SE537939C2

SE537939C2 - Coupling device for establishing a fluid connection between a first and second container and method for such a device

Info

Publication number: SE537939C2
Application number: SE1250600A
Authority: SE
Inventors: Anders Eskilsson; Gerhard Kopplin; Per Nyberg
Original assignee: Mann Teknik Ab
Priority date: 2012-06-08
Filing date: 2012-06-08
Publication date: 2015-12-01
Also published as: SE1250600A1

Abstract

SAMMANDRAG Kopplingsanordning for fluidforbindelse mellan en forsta och en andra behallare. Kopplingsanordningen innefattar en forsta kopplingsdel (1) och en andra kopplingsdel (2) for anslutning till respektive behallare. Den forsta kopplingsdelen innefattar en forsta genomstromningskanal, och en forsta ventil (600), som är anordnad att medge fluidpassage genom den forsta genomstromningskanalen cid den forsta kopplingsdelen är forbunden med den andra kopplingsdelen. Den andra kopplingsdelen innefattar en andra genomstrOmningskanal, och en andra ventil (800), som är anordnad att medge fluidpassage genom den andra genomstromningskanalen da den andra kopplingsdelen är forbunden med den forsta kopplingsdelen. Kopplingsanord- ningen uppvisar dels ett forsta kopplingslage, dar kopplingsdelarna är frikopplade fran varandra och dar ventilerna forhindrar fluidpassage, dels ett andra kopplingslage, dar kopplingsdelarna är forbundna med varandra och dar ventilerna medger fluidkommunikation mellan behallar- na. Kopplingsanordningen uppvisar dessutom ett tredje kopplingslage, dar ventilerna forhindrar fluidpassage, men dar kopplingsdelarna är fOrbundna med varandra under bildande av en fluidlackagekanal (25, 28, 29), som är an- ordnad att leda eventuellt fluidlackage, som lacker fran nagon av kopplingsdelarna, ut fran kopplingsanordningen sá att namnda fluidlackage kan detekteras innan kopplingsdelarna frikopplas fran varandra. SUMMARY Coupling device for fluid connection between a first and a second container. The coupling device comprises a first coupling part (1) and a second coupling part (2) for connection to the respective container. The first coupling part comprises a first flow channel, and a first valve (600), which is arranged to allow fluid passage through the first flow channel and the first coupling part is connected to the second coupling part. The second coupling part comprises a second flow channel, and a second valve (800), which is arranged to allow fluid passage through the second flow channel as the second coupling part is connected to the first coupling part. The coupling device has a first coupling layer, where the coupling parts are disengaged from each other and where the valves prevent fluid passage, and a second coupling layer, where the coupling parts are connected to each other and where the valves allow fluid communication between the containers. The coupling device further has a third coupling layer, where the valves prevent fluid passage, but where the coupling parts are connected to each other to form a fluid lacquer channel (25, 28, 29), which is arranged to direct any fluid lacquer, which paints from any of the coupling parts, out. from the coupling device so that said fluid leakage can be detected before the coupling parts are disengaged from each other.

Description

Kopplingsanordning fOr upprattande av en fluidforbindelse mellan en fersta och andra behallare samt ferfarande vid en sadan anordning Foreliggande uppfinning avser en kopplingsanordning for upprattande av en fluidforbindelse mellan en forsta behallare och en andra behallare, vilken kopplingsanordning innefattar en fersta kopplingsdel fer anslutning till den forsta behallaren och en andra kopplingsdel for anslut- ning till den andra behallaren, vilken forsta kopplings- del innefattar: en forsta genomstromningskanal for fluidet, och en i den forsta genomstromningskanalen placerad forsta ventil, som Or anordnad att medge fluidpassage genom den forsta genomstromningskanalen endast da den forsta kopplingsdelen är fluidtatt forbunden med den andra kopplingsdelen, och vilken andra kopplingsdel innefattar: en andra genomstromningskanal for fluidet, och - en i den andra genomstromningskanalen placerad andra ventil, som Or anordnad att medge fluidpassage genom den andra genomstrOmningskanalen endast da den andra kopplingsdelen är fluidtatt farbunden med den forsta kopplingsdelen, vilken kopplingsanordning uppvisar dels ett forsta kopp- lingslage, dar kopplingsdelarna Or frikopplade fran varandra och dar ventilerna Or anordnade att forhindra fluidpassage genom genomstromningskanalerna, dels ett andra kopplingslage, dar kopplingsdelarna är fluidtatt forbundna med varandra och dar ventilerna är anordnade att medge fluidpassage genom genomstromningskanalerna for att medge fluidkommunikation mellan behallarna. The present invention relates to a coupling device for establishing a fluid connection between a first container and a second container, which coupling device comprises a first coupling part for connection to the first container and a second coupling part for connection to the second container, which first coupling part comprises: a first flow channel for the fluid, and a first valve placed in the first flow channel, which Or is arranged to allow fluid passage through the first flow channel only when the first coupling part is fluidly connected to the second coupling part, and which second coupling part comprises: a second flow channel for the fluid, and - a second valve located in the second flow channel, which Or is arranged to allow fluid passage through the second flow channel, a only when the second coupling part is fluidly connected to the first coupling part, which coupling device has a first coupling layer, where the coupling parts Or are disengaged from each other and where the valves Or are arranged to prevent fluid passage through the flow channels, and a second coupling layer where the coupling parts are fluid with each other and where the valves are arranged to allow fluid passage through the flow channels to allow fluid communication between the containers.

For overforing av en fluid, dvs. en vatska eller en gas eller en kombination darav, mellan tva behallare, t.ex. en stationar behallare och en mobil behallare, sasom 1 tankbilar och tankar som transporteras pa jarnvag, anvandes utrustningar, som innefattar kopplingsanordningar, som oppnas och stangs automatiskt nar en slang eller fyllningsarm kopplas in respektive kopplas bort. En sadan kopplingsanordning bestar av tva kopplingsdelar eller kopplingshalvor, vanligtvis betecknade handel och hondel, som vardera innefattar en ventilbildande kolv. De tva mot varandra vanda andarna av han- och hondelarna är utformade for att tillsammans bilda en bajonettfattning. Han- delens kolv är normalt fjaderbelastad for att inta ett sjalvstangande utgangs- eller vilolage. Handelen kan t.ex. vara anordnad i en forbindelse till den stationara behallaren, medan hondelen kan vara uppburen av en slang. Hopkopplingen av hon- och handelarna och fluidforbindel- sen mellan de stationara och mobila behallarna upprattas genom att en operator vrider hondelen i forhallande till handelen. Vid den inledande vridningen lases kopplingsdelarna forst sa att de blir axiellt fixerade till varandra och sa att ett fluidtatt forband upprattas mellan kopp- lingsdelarna. Vid fortsatt vrldning oppnas sedan respek- tive kopplingsdel mekaniskt, sa att kopplingsdelarnas genomstromningskanaler satts i forbindelse med varandra. Det mekaniska oppnandet sker genom att handelens kolv forskjuts axiellt i riktning mot handelens kolv. For detta andamal innefattar hondelen en medbringaranordning, som innefattar kamkurvor, som omvandlar namnda vridrorelse till en axiell translationsrorelse has handelens kolv. Vid denna translationsrorelse bringas handelens kolv fran ett stangt utgangslage till ett oppet lage sam- tidigt som handelens kolv kraftpaverkar handelens kolv och bringar denne fran sitt stangda utgangslage till ett oppet lage. For transferring a fluid, i.e. a liquid or a gas or a combination thereof, between two containers, e.g. A stationary container and a mobile container, such as tankers and tanks transported by rail, used equipment which included coupling devices which opened and closed automatically when a hose or filling arm was connected or disconnected. Such a coupling device consists of two coupling parts or coupling halves, usually referred to as a trade and a female part, each of which comprises a valve-forming piston. The two opposing spirits of the male and female parts are designed to form a bayonet socket together. The trade piston is normally spring-loaded to assume a self-locking output or rest position. The trade can e.g. be arranged in a connection to the stationary container, while the female part may be supported by a hose. The interconnection of the female and the traders and the fluid connection between the stationary and mobile containers is established by an operator turning the female part in relation to the trade. During the initial rotation, the coupling parts are first read so that they are axially fixed to each other and so that a fluid-tight joint is established between the coupling parts. With continued rotation, the respective coupling part is then opened mechanically, so that the flow channels of the coupling parts are connected to each other. The mechanical acquisition takes place by the trade piston being displaced axially in the direction of the trade piston. To this end, the female part comprises a carrier device, which comprises cam curves, which convert said rotational movement into an axial translational movement having the piston of the trade. In this translational movement, the piston of the trade is brought from a closed initial layer to an open layer at the same time as the commercial piston acts on the piston of the trade and brings it from its closed initial layer to an open layer.

Upprattandet av en koppling mellan kopplingsdelarna inne- fattar saledes att kopplingsdelarna forst lases axiellt 2 och fluidtatt till varandra, varefter ventilen has respektive kopplingsdel oppnas, si att en fluidpassage genom kopplingen upprattas. The establishment of a coupling between the coupling parts thus comprises that the coupling parts are first read axially 2 and fluidly tight to each other, after which the valve has the respective coupling part opened, so that a fluid passage through the coupling is established.

Brytningen ay kopplingen mellan kopplingsdelarna sker pi samma satt som yid ihopkopplingen, fast i omvand ordning. Operatoren vrider hondelen i forhallande till handelen i en vridriktning som är motsatt den vid ihopkopplingen. Genom denna vridrorelse bringas hondelens kolv till en translationsrorelse i riktning bort fran handelen, varvid hondelens kolv bringas fran sitt Oppna lage till sitt stangda utgingslage. Samtidigt tillits aven den fjaderbelastade handelen att atervanda fran sitt oppna lage till sitt stangda utgangslage. Vid fortsatt vridrarelse las- gars sedan den axiella fixeringen mellan kopplingsde- larna, varigenom brytningen av kopplingen fullbordas. The breaking of the coupling between the coupling parts takes place in the same way as the coupling, but in reverse order. The operator rotates the female part in relation to the trade in a direction of rotation which is opposite to that of the coupling. By this rotational movement the piston of the female part is brought to a translational movement in the direction away from the trade, whereby the piston of the female part is brought from its open bearing to its closed starting position. At the same time, the feather-laden trade is also trusted to return from its open layer to its closed starting layer. In the event of continued rotation, the axial fixation between the coupling parts is then welded, whereby the breaking of the coupling is completed.

Kopplingsanordningar av det ovan beskrivna slaget Or kanda t.ex. genom SE 507753 C2 och SE 533006 C2. Coupling devices of the type described above Or kanda e.g. by SE 507753 C2 and SE 533006 C2.

Ett problem vid denna typ av kopplingsanordning Or att operatoren inte med sakerhet kan veta att de bAda kopplingsdelarnas ventiler har Atervant till sina stangda utgangslagen innan kopplingen mellan kopplingsdelarna slut- ligen bryts. Om nagon av ventilerna av nAgon anledning inte sluter tatt di kopplingen bryts, riskerar fluidet att lacka ut. Om lOckaget Or kraftigt, kan det i detta lage vara svart att snabbt Ateruppratta kopplingsforbindelsen mellan kopplingsdelarna, varvid ett omfattande fluidlackage till omgivningen riskeras. A problem with this type of coupling device Or that the operator can not know for sure that the valves of the two coupling parts have Atervant to their closed output layers before the coupling between the coupling parts is finally broken. If any of the valves for any reason do not close when the coupling is broken, the fluid risks leaking out. If the leakage is severe, it may be difficult in this layer to quickly re-establish the coupling connection between the coupling parts, whereby an extensive fluid leakage to the surroundings is risked.

Andamalet med foreliggande uppfinning Or att losa detta problem och frambringa en kopplingsanordning, som, innan kopplingen slutligen bryts, medger saker indikering pa att kopplingsdelarnas ventiler verkligen sluter tatt. 3 Kopplingsanordningen enligt uppfinningen kannetecknas av att den uppvisar ett tredje kopplingslage, dar ventilerna är anordnade att forhindra fluidpassage genom genomstromningskanalerna, men dar kopplingsdelarna är forbundna med varandra under bildande av en fluidlackagekanal, som är anordnad att leda eventuellt fluidlackage, som lacker fran nagon av kopplingsdelarna, ut fran kopplingsanordningen sa att namnda eventuella fluidlackage kan detekteras innan kopplingsdelarna frikopplas fran varandra. The object of the present invention is to solve this problem and to produce a coupling device which, before the coupling is finally broken, allows things to indicate that the valves of the coupling parts really close. The coupling device according to the invention is characterized in that it has a third coupling layer, where the valves are arranged to prevent fluid passage through the flow channels, but where the coupling parts are connected to each other to form a fluid leaching channel, which is arranged to conduct any fluid lacquer. , out of the coupling device so that said possible fluid leakage can be detected before the coupling parts are disengaged from each other.

Uppfinningen kommer i det feljande att beskrivas narmare med hanvisning till bifogade ritningar. In the following, the invention will be described in more detail with reference to the accompanying drawings.

Figur 1 visar i genomskarning en hondel och en handel has en utforingsform av en kopplingsanordning enligt uppfin- ningen, vilken kopplingsanordning är i ett forsta kopplingslage. Figure 1 shows in cross-section a female part and a trade have an embodiment of a coupling device according to the invention, which coupling device is in a first coupling layer.

Figur 2 visar i genomskarning en svivelhylsa has hondelen enligt figur 1. Figure 2 shows in section a swivel sleeve has the female part according to figure 1.

Figur 3 visar svivelhylsan enligt figur 2 i perspektiv. Figure 3 shows the swivel sleeve according to figure 2 in perspective.

Figur 4 visar i genomskarning ett slangdelshus has honde- len enligt figur 1. Figure 4 shows in section a hose part housing has the dog part according to figure 1.

Figur 5 visar slangdelshuset enligt figur 4 i perspektiv. Figure 5 shows the hose part housing according to figure 4 in perspective.

Figur 6 visar i genomskarning en svivelring has hondelen enligt figur 1. Figure 6 shows in section a swivel ring has the female part according to figure 1.

Figur 7 visar svivelringen enligt figur 6 i perspektiv. Figure 7 shows the swivel ring according to figure 6 in perspective.

Figur 8 visar i genomskarning en medbringare has hondelen enligt figur 1. Figure 8 shows in section a carrier has the female part according to figure 1.

Figur 9 visar medbringaren enligt figur 8 i perspektiv. 4 Figur 10 visar i en sidovy ett kolvstycke has hondelen enligt figur 1. Figure 9 shows the carrier according to figure 8 in perspective. Figure 10 shows in a side view a piston piece of the female part according to figure 1.

Figur 11 visar kolvstycket enligt figur 10 i perspektiv. Figure 11 shows the piston piece according to figure 10 in perspective.

Figur 12 visar i en sidovy en kolv has hondelen enligt figur 1. Figure 12 shows in a side view a piston has the female part according to figure 1.

Figur 13 visar kolven enligt figur 12 i perspektiv. Figure 13 shows the piston according to figure 12 in perspective.

Figur 14 visar i genomskdrning ett tankdelshus has handelen enligt figur 1. Figure 14 shows in cross section a tank part house has the trade according to figure 1.

Figur 15 visar tankdelshuset enligt figur 14 i ett forsta perspektiv. Figure 15 shows the tank part housing according to figure 14 in a first perspective.

Figur 16 visar tankdelshuset enligt figur 14 i ett andra perspektiv. Figure 16 shows the tank part housing according to figure 14 in a second perspective.

Figur 17 visar i en sidovy en kolv has handelen enligt figur 1. Figure 17 shows in a side view a piston has the trade according to figure 1.

Figur 18 visar kolven enligt figur 17 i perspektiv. Figure 18 shows the piston according to figure 17 in perspective.

Figur 19 visar hondelen enligt figur 1 i en vy framifran, ddr hondelen är i det forsta kopplingsldget. Figure 19 shows the female part according to figure 1 in a front view, where the female part is in the first coupling joint.

Figur 20 visar i genomskdrning kopplingsanordningen en- ligt figur 1 vid inledningen av en kopplingsoperation. Figure 20 shows in cross section the coupling device according to figure 1 at the beginning of a coupling operation.

Figur 21 visar hondelen enligt figur 1 i en vy framifran, ddr hondelen är ett tredje kopplingsldge. Figure 21 shows the female part according to figure 1 in a front view, where the female part is a third coupling member.

Figur 22 visar i genomskdrning kopplingsanordningen en- ligt figur 1 i det tredje kopplingsldget. Figure 22 shows in cross section the coupling device according to figure 1 in the third coupling device.

Figur 23 visar hondelen enligt figur 1 i en vy framifrdn, ddr hondelen är ett andra kopplingsldge. Figure 23 shows the female part according to Figure 1 in a front view, where the female part is a second coupling member.

Figur 24 visar i genomskdrning kopplingsanordningen en- ligt figur 1 i det andra kopplingsldget. Figure 24 shows in cross section the coupling device according to figure 1 in the second coupling device.

Figur 25 visar en detaljvy av figur 20. Figure 25 shows a detail view of Figure 20.

Figur 26 visar en detaljvy av figur 22. 10 Figur 27 visar en detaljvy av figur 24. Figure 26 shows a detail view of Figure 22. Figure 27 shows a detail view of Figure 24.

Med hdnvisning till figurerna visas en kopplingsanordning for LPG (Liquefied Petroleum Gas). Kopplingsanordningen innefattar en forsta kopplingsdel eller hondel 1 och en andra kopplingsdel eller handel 2. Kopplingsdelarna 1, 2 innefattar ingreppsdon som, cid de fars samman och vrids kring kopplingsanordningens centrumaxel 3, bildar en bajonettldsning. Referring to the figures, a coupling device for LPG (Liquefied Petroleum Gas) is shown. The coupling device comprises a first coupling part or female part 1 and a second coupling part or handle 2. The coupling parts 1, 2 comprise engaging means which, when they are folded together and rotated about the central axis 3 of the coupling device, form a bayonet release.

Hondelen 1 Or anordnad att vara ansluten till en slang och kan ddrfor Oven bendmnas slangdel. Handelen 2 är anordnad att vara ansluten till en tank och kan ddrfor dven bendmnas tankdel. The female part 1 is arranged to be connected to a hose and can therefore be connected to the hose part of the bend. The handle 2 is arranged to be connected to a tank and can therefore be the tank part of the bend.

Hondelen 1 innefattar en svivelhylsa 100, ett slangdelshus 200, en svivelring 300, en medbringare 400, ett kolvstycke 500 och en slangdelskolv 600. Handelen 2 innefattar ett tankdelshus 700 och en tankdelskolv 800. The female part 1 comprises a swivel sleeve 100, a hose part housing 200, a swivel ring 300, a carrier 400, a piston piece 500 and a hose part piston 600. The trade 2 comprises a tank part housing 700 and a tank part piston 800.

Svivelhylsan 100 (se figurer 3 och 4) Or framstdllt i ett stycke och har en frdmre, oppen, dvs. genombruten dndyta 101 och en bakre, Oppen, dvs. genombruten dndyta 102, vilka dndytor 101, 102 Or parallella med varandra. Den frdmre dndytan 101 omsluter ddrvid en frdmre dndoppning 103, och den bakre dndytan 102 omsluter en bakre dndappning 104 hos hylsan 100. Hylsan 100 uppvisar sdledes en 6 axiellt genomgAende Oppning 105, som stracker sig mellan de tvA andeppningarna 103, 104. Den axiellt genomgdende oppningen 105 innefattar ett frOmre, cylinderformat utrymme 106, som stracker sip frAn den framre andytan 101 och som overgAr i ett inre, cylinderformat utrymme 107, som har en nagot mindre diameter an det framre utrymmet 106. Det inre utrymmet 107 overgAr i sin tur i ett bakre, cylinderformat utrymme 108, som uppvisar invandiga gangor 109 for mottagande av en slanganslutning. Vid overgAngen mellan det inre utrymmet 107 och det bakre utrymmet 108 uppvisar huset 100 en invandig, ringformig, radiell flans som har en diameter som är mindre an det inre utrymmet 107 och som darigenom bildar en ringformig stodyta som vAnder mot det inre utrymmet 107. Vid den frAmre andoppningen 103 uppvisar hylsan 100 en runtomgaende, kvartcirkelformad urtagning 112 for samverkan med ett vridlager 4 (se figur 1). PA ett kart avstAnd frAn den framre andoppningen 103 uppvisar hylsan 100 en utvandig, ringformig, radiell flans 113, som bildar en ringformig stadyta 114, som vander mot den frOmre Oppningen 103. The swivel sleeve 100 (see Figures 3 and 4) is made in one piece and has a front, open, ie. openwork surface 101 and a rear, Open, ie. perforated end surface 102, which end surfaces 101, 102 are parallel to each other. The front end face 101 thereby encloses a front end face 103, and the rear end face 102 encloses a rear end face 104 of the sleeve 100. The sleeve 100 thus has an axially through opening 105 which extends between the two end faces 103, 104. the opening 105 comprises a front, cylindrical space 106, which extends sip from the front end surface 101 and which merges into an inner, cylindrical space 107, which has a slightly smaller diameter than the front space 106. The inner space 107 in turn merges into a rear, cylindrical space 108, which has internal passages 109 for receiving a hose connection. At the transition between the inner space 107 and the rear space 108, the housing 100 has an inner, annular, radial flange which has a diameter which is smaller than the inner space 107 and which thereby forms an annular support surface which faces the inner space 107. At the front end opening 103 has the sleeve 100 with a circumferential, quarter-circular recess 112 for co-operation with a pivot bearing 4 (see figure 1). On a map spaced from the front opening 103, the sleeve 100 has an outer annular radial flange 113 which forms an annular static surface 114 which faces the front opening 103.

Mellan stodytan 114 och den framre Oppningens 103 plan uppvisar hylsan 100 en cirkularcylindrisk, utvandig yta 115, som har utvOndiga 0.1-Igor 116 far samverkan med svivelringen 300 (se figur 1). Between the standing surface 114 and the plane of the front opening 103, the sleeve 100 has a circular-cylindrical, outer surface 115, which has external 0.1-Igor 116 in cooperation with the swivel ring 300 (see Figure 1).

Slangdelshuset 200 (se figurer 4 och 5) Or Oven det framst011t i ett stycke och har en framre, Oppen, dvs. genombruten andyta 201 och en bakre, oppen, dvs. genombruten Andyta 202, vilka Oppna Ondytor 201, 202 är parallella med varandra. Den frOmre andytan 201 omsluter dOrvid en framre andoppning 203 och den bakre andytan 202 omsluter en bakre andoppning 204 has huset 200. Huset 200 uppvisar saledes en axiellt genomgaende Oppning 205, som strOcker sip mellan andOppningarna 201, 202. Den axiellt genomgd- ende oppningen 205 innefattar ett framre, cylinderformat utrymme 206, som strOcker sip fran den framre andytan 201 och som overgAr i ett inre, cylinderformat utrymme 207, 7 som har en mindre diameter an det framre utrymmet 206. Vid overgAngen mellan det framre utrymmet 206 och det inre utrymmet 207 bildas, genom namnda diameterskillnad, en ringformig, radiell stodyta 208, som vander mot det framre utrymmer 206. Det inre utrymmet 207 evergar i ett bakre, cylinderformat utrymme 209. Vid overgAngen mellan det inre utrymmet 207 och det bakre utrymmet 209 uppvisar huset 200 en ringformig, invandig, radiell flans 210, som har en mindre diameter an det inre utrymmet 207 och som darigenom bildar en ringformig stodyta 211, som vander mot det inre utrymmet 207. PA ett kart avstand frAn den framre andytan 201 uppvisar huset 200 ett forsta utvandigt, ringformigt spar eller urtagning 212 for mottagande av en stotdampande skyddsring 6 (se figur 1), som fare- tradesvis Pr av ett elastiskt material, t.ex. gummi. Mitt for den invandiga flansen 210 uppvisar huset 200 ett andra utvandigt, ringformigt spAr eller urtagning 213 far en lamplig ringtatning 7 (se figur 1), och strax framfor spAret 213 uppvisar huset 200 ett tredje utvandigt, ring- formigt spAr eller urtagning 214 for mottagande av namnda vridlager 4 (se figur 1). Vidare finns vid den bakre andytan 202 ett utvandigt, ringformigt spar 215 for ett ringformigt glidlager 8 (se figur 1). Den framre delen av huset 200, som omsluter det framre utrymmet 206, uppvisar strax bakom urtagningen 212 tre radiella hAl 216, som Pr jamnt fordelade i omkretsled och som Pr anordnade for montering av rullaxlar 9, som stracker sip in i det framre utrymmet 206 for att uppbara ingreppsrullar 10 (se figur 1). Den bakre delen av huset 200, som omsluter det bakre utrymmet 209, uppvisar tvA kamspar 217, 218, som vardera bildar en genomgAende oppning i husets 200 cylindervagg. KamspAren 217, 218 Pr symmetriska i husets 200 langd- eller centrumaxel 219, vilket innebar att det andra kamspAret 218 Pr likadant utformat som det forsta kamspAret 217, men farskjutet ett halvt vary, eller 180 grader, relativt det farsta kamspAret 217. Varje kamspAr 217, 218 definieras av en framre kamkurva 220 och en 8 bakre kamkurva 221, vilka sammanbinds med varandra genom en framre andyta 222 och en bakre andyta 223. Varje kamspar 217, 218 innefattar ett framre kamparti 224, dar den framre kamkurvan 220 loper i huvudsak rakt i husets 200 omkretsriktning och dar den bakre kamkurvan 221 loper i en konkav bana, ett mellanliggande kamparti 225, dar kamkurvorna 220, 221 loper i huvudsak parallellt med varandra i spiralbanor kring centrumaxeln 219, och ett bakre kamparti 226, dar kamkurvorna 220, 221 loper i hu- vudsak parallellt med varandra i husets 200 omkretsrikt- ning. Huset 200 innefattar aven tva utvandiga, motstaende monteringsklackar 228 for montering av handtag 11 (se figur 1). Mellan monteringsklackarna 228 uppvisar huset en genomgaende, cirkular oppning 229 far mottagande av en fjaderbelastad lassprint 22 (se figur 1), vilken oppning 229 mynnar i den inre delen av det framre utrymmet 206. The hose part housing 200 (see figures 4 and 5) Or Above it appears in one piece and has a front, Open, ie. openwork front surface 201 and a rear, open, ie. openwork face surface 202, which open face surfaces 201, 202 are parallel to each other. The front end face 201 encloses a front end opening 203 and the rear end face 202 encloses a rear end opening 204 having the housing 200. The housing 200 thus has an axially through opening 205, which extends sip between the end openings 201, 202. The axially through opening 205 comprises a front, cylindrical space 206, which extends sip from the front end surface 201 and which merges into an inner, cylindrical space 207, 7 which has a smaller diameter than the front space 206. At the transition between the front space 206 and the inner space 207, by said diameter difference, an annular, radial support surface 208 is formed, which faces the front space 206. The inner space 207 forms a rear, cylindrical space 209. At the transition between the inner space 207 and the rear space 209, the housing 200 has an annular, inner, radial flange 210, which has a smaller diameter than the inner space 207 and thereby forms an annular support surface 211, which facing the inner space 207. At a short distance from the front end surface 201, the housing 200 has a first external annular groove or recess 212 for receiving a shock-absorbing protective ring 6 (see Figure 1), which is dangerously Pr of an elastic material , e.g. rubber. In front of the inner flange 210, the housing 200 has a second outer annular groove or recess 213 having a lamp ring recess 7 (see Figure 1), and just in front of the groove 213 the housing 200 has a third outer, annular groove or recess 214 for receiving of said rotary bearing 4 (see figure 1). Furthermore, at the rear end surface 202 there is an external, annular groove 215 for an annular sliding bearing 8 (see figure 1). The front part of the housing 200, which encloses the front space 206, has just behind the recess 212 three radial holes 216, which Pr evenly distributed in circumferential direction and which Pr arranged for mounting roller shafts 9, which stretch sip into the front space 206 for to support engaging rollers 10 (see Figure 1). The rear part of the housing 200, which encloses the rear space 209, has two cam pairs 217, 218, each of which forms a through-opening in the cylinder wall of the housing 200. The cam groove 217, 218 Pr is symmetrical in the longitudinal or center axis 219 of the housing 200, which means that the second cam groove 218 Pr is similarly shaped to the first cam groove 217, but has a half shift, or 180 degrees, relative to the first cam groove 217. Each cam groove 217 , 218 is defined by a front cam curve 220 and an 8 rear cam curve 221, which are connected to each other by a front end face 222 and a rear end face 223. Each cam pair 217, 218 includes a front cam portion 224, where the front cam curve 220 runs substantially straight. in the circumferential direction of the housing 200 and where the rear cam curve 221 runs in a concave path, an intermediate cam portion 225, where the cam curves 220, 221 run substantially parallel to each other in helical paths about the center axis 219, and a rear cam portion 226 where the cam curves 220, 221 run substantially parallel to each other in the circumferential direction of the housing 200. The housing 200 also includes two external, opposing mounting lugs 228 for mounting handles 11 (see Figure 1). Between the mounting lugs 228, the housing has a continuous, circular opening 229 for receiving a spring-loaded load pin 22 (see Figure 1), which opening 229 opens into the inner part of the front space 206.

Medbringaren 400 (se figurer 8 och 9) Or framstalld i ett stycke och uppvisar en framre, oppen, dvs. genombruten andyta 401 och en bakre, oppen, dvs. genomhruten andyta 402, vilka Oppna andytor 401, 402 Or parallella med varandra. Den framre andytan 401 omsluter darvid en framre andappning 403 och den bakre andytan 402 omsluter en bakre andoppning 404 hos medbringaren 400. Medbringa- rens 400 axiellt genomgaende oppning 405 stracker sig sa- ledes mellan andappningarna 403, 404 och bildar ett cylinderformat utrymme 406. Den framre andytan 401 uppvisar en runtomgaende urtagning 407 for mottagande av en ringtatning 12 (se figur 1), som Or anordnad att samverka och bilda ett tatt farband med handelen 2 da kopplingsanord- ningen Or i sitt oppna lage. Medbringaren 400 är pa sin utsida utformad med en runtomgaende, stodbildande, radiell flans 408, som Or belagen pa ett forutbestamt litet avstand fran den framre andytan 401. Flansen 408 uppvisar tre radiella forsta urtagningar 409, som Or jamnt forde- lade i omkretsled, och tre axiella klackar 410, som Or 9 jamnt fordelade i omkretsled och forskjutna ca 0 i forhallande till urtagningarna 409 rdknat fran deras cent-rum. Klackarna 410 utskjuter fran den sida av flansen 408 som är belagen narmast den frdmre andytan 401 och slutar strax fore den frdmre andytans 401 plan. Det fria dndpar- tiet 411 av varje klack 410 har en radiell urtagning 412, som uppvisar en konkav bottenyta. Flansen uppvisar aven en radiell andra urtagning 413, som stracker sig fran en av de forsta urtagningarna 409a och moturs till den an- gransande klacken 410a, vilken urtagning 413 uppvisar en bottenyta 419. Mellan flansen 408 och den bakre andytan 402 uppvisar medbringaren 400 ett utvandigt, ringformigt spar 414 for en ringtdtning 13, som är anordnad att samverka och bilda ett tdtt forband med huset 200 (se fi- gur 1). Utrymmets 406 invandiga begransningsyta 415 upp- visar tva motstaende, axiella styrspar 416 for mottagande och styrning av kolvstycket 500 (se figur 1). Vid den framre andoppningen 403 uppvisar den invandiga begransningsytan 415 ett avfasat parti 417, vilket parti 417 är anordnat att samverka med kolven 600 da hondelen 1 är i sitt stangda lage (se figur 1). The carrier 400 (see Figures 8 and 9) is made in one piece and has a front, open, i.e. openwork front surface 401 and a rear, open, ie. pierced face surfaces 402, which open face surfaces 401, 402 or parallel to each other. The front end face 401 thereby encloses a front end opening 403 and the rear end face 402 encloses a rear end opening 404 of the driver 400. The axially through opening 405 of the driver 400 thus extends between the breath openings 403, 404 and forms a cylindrical space 406. It the front end face 401 has a circumferential recess 407 for receiving a ring socket 12 (see figure 1), which Or is arranged to co-operate and form a tight connection with the trade 2 when the coupling device Or is in its open position. The carrier 400 is formed on its outside with a circumferential, pillar-forming, radial flange 408, which is coated at a predetermined small distance from the front end face 401. The flange 408 has three radial first recesses 409, which are evenly distributed circumferentially, and three axial lugs 410, which Or 9 are evenly distributed circumferentially and offset about 0 in relation to the recesses 409 extending from their center. The lugs 410 project from the side of the flange 408 which is coated closest to the front end face 401 and terminate just before the plane of the front end face 401. The free end portion 411 of each lug 410 has a radial recess 412 which has a concave bottom surface. The flange also has a radial second recess 413 which extends from one of the first recesses 409a and counterclockwise to the adjacent lug 410a, which recess 413 has a bottom surface 419. Between the flange 408 and the rear end surface 402 the carrier 400 has an external , annular groove 414 for a ring seal 13, which is arranged to cooperate and form a tight connection with the housing 200 (see figure 1). The inner boundary surface 415 of the space 406 has two opposing, axial guide pairs 416 for receiving and guiding the piston piece 500 (see Figure 1). At the front opening 403, the inner delimiting surface 415 has a chamfered portion 417, which portion 417 is arranged to cooperate with the piston 600 when the female part 1 is in its closed position (see figure 1).

Kolvstycket 500 (se figurer 10 och 11) innefattar ett forsta parti 501, som är i huvudsak rektanguldrt, och ett andra parti 502, som är i huvudsak rorformigt. Det forsta partiet 501 stracker sig mellan en forsta, frdmre ande 503 och en andra, bakre ande 504 has partiet 501, vilka dndar är i huvudsak parallella med varandra. Det forsta partiet 501 har en tjocklek som är nagot mindre an bred- den has medbringarens 400 styrspar 416 (se figurer 8 och 9), vilket mojliggor en axiell rorelse has kolvstycket 500 relativt medbringaren 400. Vid sin forsta ande 503 uppvisar det forsta partiet 501 en centralt placerad, genomgaende oppning 505, som är anordnad att inga i ett forband mellan kolvstycket 500 och kolven 600. Det andra partiet 502 är fast forbundet, foretrddesvis svetsat, vid det forsta partiets 501 andra ande 504 och uppvisar en 10 genomgdende, axiell kanal eller oppning 506, som är anordnad att bilda ett sate for en kamaxel. Kamaxeln, i sin tur, Or anordnad att uppbdra kamrullar 14 vid sina dndar (se figur 1, ddr dock endast en av kamrullarna visas), vilka kamrullar 14 är anordnade att lopa i ndmnda kamspAr 217, 218 under samverkan med ndmnda kamkurvor 220, 221 (se figurer 4 och 5). The piston piece 500 (see Figures 10 and 11) comprises a first portion 501, which is substantially rectangular in gold, and a second portion 502, which is substantially tubular. The first portion 501 extends between a first, front spirit 503 and a second, rear spirit 504 having the portion 501, the ends of which are substantially parallel to each other. The first portion 501 has a thickness which is slightly less than the width of the guide pair 416 of the carrier 400 (see Figures 8 and 9), which allows an axial movement of the piston piece 500 relative to the carrier 400. At its first spirit 503, the first portion 501 has a centrally located, through-opening 505, which is arranged to be in a connection between the piston piece 500 and the piston 600. The second portion 502 is fixedly connected, preferably welded, to the second end 504 of the first portion 501 and has a through-going, axial channel. or aperture 506, which is arranged to form a sate for a camshaft. The camshaft, in turn, is arranged to support cam rollers 14 at its ends (see Figure 1, where only one of the cam rollers is shown), which cam rollers 14 are arranged to run in said cam grooves 217, 218 in cooperation with said cam curves 220, 221. (see Figures 4 and 5).

Slangdelskolven 600 (se figurer 12 och 13) har en i hu- vudsak rotationssymmetrisk form och innefattar en frdmre kolvkropp 601 och ett bakre anslutningsparti 602. Anslutningspartiet 602 uppvisar en axiell urtagningen eller skdra 603 for mottagande av den frdmre dnden 503 av kolstyckets 500 forsta parti 501. Anslutningspartiet 602 uppvisar dven en tvargaende, genomgaende oppning 604, som har samma diameter som oppningen 505 has kolvstycket 500 och som Or anordnad for mottagande av en lAssprint 15 (se figur 1) for fOrbindning av kolvstycket 500 och kolven 600. Kolvkroppen 601 uppvisar ett runtomgdende spar 60 for en ringtdtning 16 (se figur 1), som är anordnad att bilda ett tdtt far-band med medbringarens 400 avfasade parti 417 dd hondelen 1 Or i sitt stdngda ldge. The hose member piston 600 (see Figures 12 and 13) has a generally rotationally symmetrical shape and includes a front piston body 601 and a rear connecting portion 602. The connecting portion 602 has an axial recess or groove 603 for receiving the front portion 503 of the front piece piece of carbon piece 501. The connecting portion 602 also has a transverse, through-opening 604, which has the same diameter as the opening 505 having the piston piece 500 and which is arranged to receive a locking pin 15 (see Figure 1) for connecting the piston piece 500 and the piston 600. The piston body 601 has a circumferential groove 60 for a ring seal 16 (see Figure 1), which is arranged to form a tight conveyor belt with the chamfered portion 417 of the carrier 400 dd female portion 1 Or in its closed length.

Den bakre delen av medbringaren 400 har en utvdndig, i huvudsak rotationssymmetrisk yta 418 (se figur 8), som har en diameter som Or nagot mindre On den invdndiga diametern has husets 200 inre utrymme 207 (se figur 4) sa att medbringaren 400 med sin bakre dndyta 402 med glidpassning kan foras in i husets 200 inre utrymme 207 via husets 200 frdmre dndoppning 203 och lAsas i denna posit- ion genom kolvstyckets 500 och kolvens 600 samverkan med kamspdren 217 och 218. En tryckfjdder 17, som Or anordnad mellan husets 200 stOdyta 211 (se figur 4) och medbringarens 400 bakre dndyta 402 (se figur 8), pdverkar med- bringaren 400 med en axiell kraft relativt huset 200 och sdkerstdller att kolven 600 bildar ett tdtt forband med medbringaren 400 da medbringaren 400, kolvstycket 500 och 11 kolven 600 lases axiellt mot kamrullarna 14 (se figur 1) di hondelen 1 är i sitt stangda ldge. Ringtatningen 13 sakerstaller att ett tatt forband bildas mellan medbringarens 400 yta 418 och den motstaende, inre, rotationssym- metriska ytan 227 has husets 200 inre utrymme 207 (se fi- gur 4). Namnda arrangemang medger att huset 200 kan vridas kring centrumaxeln 3 i forhallande till medbringaren 400. The rear part of the carrier 400 has an outer, substantially rotationally symmetrical surface 418 (see figure 8), which has a diameter which is slightly smaller. On the inner diameter, the inner space 207 of the housing 200 has ( Rear end face 402 with sliding fit can be inserted into the inner space 207 of the housing 200 via the front end face 203 of the housing 200 and locked in this position by the engagement of the piston piece 500 and the piston 600 with the cam springs 217 and 218. A compression spring 17 disposed between the housing 200 support surface 211 (see Figure 4) and the rear end face 402 of the carrier 400 (see Figure 8), the carrier 400 acts with an axial force relative to the housing 200 and ensures that the piston 600 forms a tight connection with the carrier 400 when the carrier 400, the piston piece 500 and The piston 600 is loaded axially against the cam rollers 14 (see figure 1) in which the female part 1 is in its closed length. The ring socket 13 ensures that a tight joint is formed between the surface 418 of the carrier 400 and the opposite, inner, rotationally symmetrical surface 227 has the inner space 207 of the housing 200 (see Figure 4). Said arrangement allows the housing 200 to be rotated about the center axis 3 in relation to the carrier 400.

Den bakre delen av huset 200 har en utvdndig diameter som är nagot mindre an den invandiga diametern has svivelhylsans 100 inre utrymme 107, sa att huset 200 med monterad medbringare 400, kolvstycke 500 och kolv 600 kan foras in i det inre utrymmet 107 och i axiell riktning fixeras i denna position med hjalp av svivelringen 300 genom att svivelringen 300 bildar ett gdngforband med svivelhylsan 100, sasom visas i figur 1. Svivelringens 300 gangfarband med svivelhyslan 100 fixerar svivelringen 300 och svivelhylsan 100 axiellt relativt vridlagret 4, och ddrigenom dven relativt huset 200. Genom vridlagrets 4 och glidlag- rets 8 (se figur 1) forsorg ar dock huset 200 vridbart relativt svivelhylsan 100 och svivelringen 300. The rear part of the housing 200 has an outer diameter which is slightly smaller than the inner diameter of the inner space 107 of the swivel sleeve 100, so that the housing 200 with mounted carrier 400, piston piece 500 and piston 600 can be inserted into the inner space 107 and into axial direction is fixed in this position by means of the swivel ring 300 by the swivel ring 300 forming a threaded connection with the swivel sleeve 100, as shown in Figure 1. The swivel ring 300 of the swivel ring with the swivel sleeve 100 fixes the swivel ring 300 and the swivel sleeve 100 axially relative to the pivot bearing 4, Through the pivot bearing 4 and the sliding bearing 8 (see figure 1), however, the housing 200 is rotatable relative to the swivel sleeve 100 and the swivel ring 300.

Svivelhylsans 100 bakre utrymme 108, husets 200 bakre ut- rymme 209, medbringarens 400 oppning 405 och husets 200 frdmre utrymme 206 bildar suedes tillsammans en genomstromningskanal fir gasen, i vilken genomstromningskanal kolven 600 dr anordnad fir att bilda en oppnings- och stdngningsbar ventil has hondelen 1. The rear space 108 of the swivel sleeve 100, the rear space 209 of the housing 200, the opening 405 of the carrier 400 and the front space 206 of the housing 200 together form a flow channel for the gas, in which the flow channel piston 600 is arranged to form an opening and closing valve. 1.

Tankdelshuset 700 (se figurer 14, 15 och 16) är framstdllt i ett cylinderformat stycke. Det har en frdmre, oppen, dvs. genombruten andyta 701 och en bakre, oppen, dvs. genombruten dndyta 702, vilka dndytor 701, 702 dr parallella med varandra och avgrdnsar var sin andoppning 703, 704. Huset 700 har en axiellt genomgaende Oppning 12 706, som saledes stracker sig mellan de tva andoppningarna 703, 704, och innefattar ett framre utrymme 707, ett inre utrymme 708 och ett bakre utrymme 709. Det framre utrymmet 707 uppvisar en rotationssymmetrisk, cylindrisk yta 710 och en rotationssymmetrisk, konisk yta 711 for samverkan med kolven 800. Det bakre utrymmet 709 uppvisar en svagt konisk yta 712, som har en ganga 713 for bildande av ett gangforband med en tankanslutning. Ett ringformigt spar 714 är utformat i huset 700 pa dess ut- sida pa ett forutbestamt litet avstand fran den framre andytan 701 och med ett fOrutbestamt djup, varvid en radiell flans 715 bildas mellan den framre andytan 701 och ringsparet 714. Denna flans 715 uppvisar tre i omkretsled jamnt fardelade, radiella och axiellt genomgaende Opp- ningar 716, som bildar axiella passager mellan den framre andytan 701 och sparet. Mellan oppningarna 716 uppvisar flansen 715 stOdytor 717, som vander bort frail andoppningen 703 och som Or anordnade att samverka med hondelens 1 ingreppsrullar 10. Vid varje oppning 716 uppvisar flansen 715 i stodytorna 717 en urtagning 718, som har ett forutbestamt djup, som kan vara i intervallet ca 1-5 mm, foretradesvis ca 2-3 mm, och en form och en krakningsradie som motsvarar formen och krokningsradien has ingreppsrullarna 10. Funktionen has dessa urtagningar 718 kommer att beskrivas narmare nedan. Mellan tatningsy- tan 710 och andoppningen 703 finns en ringformig stodyta 719, som vOnder mot Ondappningen 703 och som är anordnad att mottaga det fria andpartiet av hondelens 1 medbringare 400 for att tatande samverka med dess tatning 12. The tank part housing 700 (see figures 14, 15 and 16) is produced in a cylindrical piece. It has an early, open, ie. openwork front surface 701 and a rear, open, ie. perforated end surface 702, which end surfaces 701, 702 are parallel to each other and each delimits its own opening 703, 704. The housing 700 has an axially through opening 12 706, which thus extends between the two opening openings 703, 704, and comprises a front space 707. , an inner space 708 and a rear space 709. The front space 707 has a rotationally symmetrical, cylindrical surface 710 and a rotationally symmetrical conical surface 711 for cooperating with the piston 800. The rear space 709 has a slightly conical surface 712, which has a passage 713 for forming a gangway with a tank connection. An annular groove 714 is formed in the housing 700 on its outside at a predetermined small distance from the front end face 701 and at a predetermined depth, a radial flange 715 being formed between the front end face 701 and the ring pair 714. This flange 715 has three circumferentially evenly spaced, radial and axially through openings 716, which form axial passages between the front end face 701 and the recess. Between the openings 716, the flange 715 has support surfaces 717 which extend away from the opening 703 and which are arranged to co-operate with the engaging rollers 10 of the female part 1. At each opening 716 the flange 715 has in the support surfaces 717 a recess 718 in the range of about 1-5 mm, preferably about 2-3 mm, and a shape and a radius of curvature corresponding to the shape and the radius of curvature have the engaging rollers 10. The function of these recesses 718 will be described in more detail below. Between the sealing surface 710 and the duct opening 703 there is an annular support surface 719, which faces the unlocking 703 and which is arranged to receive the free duck portion of the carrier part 400 of the female part 1 in order for the sawing member to co-operate with its sealing 12.

Mellan det inre utrymmet 706 och det bakre utrymmet 709 uppvisar huset 700 ett kolvsate 720 (se Oven figur 1), som Or anordnat att stodja och styra kolven 800. Between the inner space 706 and the rear space 709, the housing 700 has a piston seat 720 (see Figure 1 above), which Or is arranged to support and guide the piston 800.

Tankdelskolven 800 (se figurer 17 och 18) innefattar en kolvstang 801 och en kolvskiva 802, som Or fast forbunden vid kolvstangens 801 ena ande, sasom framgar av figurer 17 och 18. Kolvskivan 802 uppvisar ett runtomgaende spar 13 803 for en ringtOtning 18 (se figur 1), som är anordnad att bilda ett tatt fOrband med husets 700 yta 710 da handelen 2 Or i sitt stOngda lOge. The tank part piston 800 (see Figures 17 and 18) comprises a piston rod 801 and a piston disc 802, which are fixedly connected to one end of the piston rod 801, as shown in Figures 17 and 18. The piston disc 802 has a circumferential groove 13 803 for a ring ring 18 (see figure 1), which is arranged to form a tight joint with the surface 700 of the housing 710 da trade 2 Or in its closed position.

Sasom framgar av figur 1 uppbar kolvsatet 720 axiella, koncentriska stodskenor 19, som Or jamt fordelade runt handelens 2 centrumaxel 3. Stodskenorna 19 uppbar i sin tur en stodskiva 20, scm uppvisar en axiell Oppning for kolvens 800 kolvstang 801. En tryckfjOder 21 Or anordnad mellan stodskivan 20 och kolvskivan 802 for att paverka kolven 800 med en axiell tryckkraft, som stravar efter att upprOtthalla kolvens 800 anliggning mot tankdelshuset 700 och pa sa satt bibehalla handelen 2 i sitt stangda lage. As can be seen from Figure 1, the piston set 720 carried axial, concentric support rails 19, which were evenly distributed around the center axis 3 of the trade 2. between the support plate 20 and the piston plate 802 to actuate the piston 800 with an axial compressive force which strives to maintain the abutment of the piston 800 against the tank part housing 700 and thus maintain the trade 2 in its closed position.

Tankdelshusets 700 genomgaende Oppning 706 bildar saledes en genomstramningskanal for gasen, i vilken genomstramningskanal kolven 800 Or anordnad for att bilda en Oppnings- och stangningsbar ventil has handelen 2. The through opening 706 of the tank part housing 700 thus forms a flow channel for the gas, in which flow passage the piston 800 Or arranged to form an opening and closing valve has the trade 2.

Hondelen 1 innefattar en lasanordning 23, som innefattar namnda lassprint 22 (se figur 1) och som är monterad, foretradesvis genom ett gangfarband, i husets 200 Oppning 229. Lasanordningen 23 innefattar en ej visad fjader, som paverkar lassprinten 22 med en kraft, som stravar efter att fora lassprinten 22 mat, i riktning mot hondelens 1 centrumaxel 3. Lasanordningen 23 innefattar Oven ett manoverdon i form av en vridbar spak 24, med vilken operatoren kan overvinna fjaderns kraft och fora lassprinten utat, bort fran hondelens 1 centrumaxel 3. Sasom framgar av figurerna 1, 4, 5, 8 och 9 Or medbringarens 400 flans 408 anordnad mitt for husets 200 Oppning 229 cid medbringaren 400 är monterad i huset 200 och lassprinten 22 Or foljaktligen anordnad att samverka med flansen 408. The female part 1 comprises a welding device 23, which comprises said welding pin 22 (see figure 1) and which is mounted, preferably by a gangway, in the opening 229 of the housing 200. The welding device 23 comprises a spring (not shown) which acts on the welding pin 22 with a force which efforts to feed the load pin 22 food, in the direction of the center axis 3 of the female part 1. The welding device 23 also comprises an actuator in the form of a rotatable lever 24, with which the operator can overcome the force of the spring can be seen from Figures 1, 4, 5, 8 and 9 Or the flange 408 of the carrier 400 is arranged in the middle of the housing 200.

Kopplingsanordningens funktion kommer i det foljande att beskrivas narmare med hanvisning till figurerna 1 och 14 19-27. Utgangslaget for en kopplingsoperation är att hondelen 1 och handelen 2 är isarkopplade och att delarna 1, 2 befinner sig i sina stangda lagen, sasom visas i figur 1. The function of the coupling device will be described in more detail below with reference to Figures 1 and 14 19-27. The starting point for a coupling operation is that the female part 1 and the trade 2 are ice-coupled and that the parts 1, 2 are in their closed layers, as shown in figure 1.

Da hondelen 1 är i sitt stangda lage är husets 200 ingreppsrullar 10 anordnade mitt for medbringarens 400 klackar 410, sAsom visas i figur 19, och kamrullarna 14 befinner sig i kamsparens 217, 218 bakre kampartier 226 i kontakt med de bakre andytorna 223. I detta lage vilar lassprinten 22 pA flansen 408 strax medurs am urtagningen 409a, sasom visas i figur 8. When the female part 1 is in its closed bearing, the engaging rollers 10 of the housing 200 are arranged opposite the lugs 410 of the carrier 400, as shown in Fig. 19, and the cam rollers 14 are in the rear cam portions 226 of the cam pair 217, 218 in contact with the rear face surfaces 223. The load pin 22 rests on the flange 408 just clockwise at the recess 409a, as shown in Figure 8.

DA handelen 2 är i sitt stangda lage är kolven 800 i tat- ande kontakt med huset 700, sasom visas i figur 1. When the trade 2 is in its closed position, the piston 800 is in contact with the housing 700, as shown in Figure 1.

InfOr kopplingsoperaticnen for operatoren hondelen 1 sa att dess framre ande 26 vander mot handelens 2 framre ande 27, sasom visas i figur 1. Med hondelen 1 i sitt stangda lage far opera-Laren sedan hondelen 1 i axiell riktning mot handelen 1 sá att hondelens 1 ingreppsrullar 10 fors in genom husets 700 oppningar 716 och in i sparet 714 under det att klackarna 410 samtidigt fars in i Oppningarna 716. Under denna axiella rarelse bringas med- bringarens 400 framre andyta 401 i kontakt med husets 700 framre andyta 701 och kolven 600 bringas i kontakt med kolven 800, sasom visas i figur 20 och mera detaljerat i figur 25. The coupling operator for the operator female part 1 said that its front end 26 faces the front end 27 of the trade 2, as shown in Figure 1. engagement rollers 10 are inserted through the openings 716 of the housing 700 and into the recess 714 while the lugs 410 are simultaneously inserted into the openings 716. During this axial movement, the front end face 401 of the carrier 400 is brought into contact with the front end face 701 of the housing 700 and the piston 600 is brought in contact with the piston 800, as shown in Figure 20 and in more detail in Figure 25.

Genom att vrida handtagen 11 kring hondelens 1 och hande- lens 2 gemensamma axel 3 bringar sedan operatoren huset 200 att vrida sig relativt medbringaren 400 i en forsta, kopplande vridrarelse, varvid ingreppsrullarna 10 bringas att lamna sina positioner framfor klackarna 410, som i vridriktningen är fixerade i oppningarna 716, och fors in bakom flansen 715, dar de forst bringas att samverka med urtagningarna 718 och sedan med stodytorna 717 under det att ett bajonettforband eller bajonettkoppling bildas mellan hondelen 1 och handelen 2. Under inverkan av en axiell kraft, som genereras genom ingreppsrullarnas 10 samverkan med stOdytorna 717, bringas andytan 401 och stedytan 719 att gastatt samverka med varandra. By rotating the handles 11 about the common axis 3 of the female part 1 and the handle 2, the operator 200 then causes the housing 200 to rotate relative to the carrier 400 in a first, coupling rotational movement, causing the engaging rollers 10 to leave their positions in front of the lugs 410, which are fixed in the openings 716, and forced in behind the flange 715, where they are first brought into engagement with the recesses 718 and then with the support surfaces 717 while a bayonet joint or bayonet coupling is formed between the female part 1 and the trade 2. Under the influence of an axial force generated by the engagement of the engaging rollers 10 with the support surfaces 717, the face surface 401 and the location surface 719 are caused to co-operate with each other.

Under den inledande fasen av den kopplande vridrorelsen kommer den fjaderbelastade lissprinten 22 att tvingas ned i urtagningen 409a (se figur 9), sisom visas i figur 21, samtidigt som ingreppsrullarna 10 bringas att passera ur- tagningarna 718. I riktning mot den narmaste lisklacken begransas urtagningen 409a av en i huvudsak radiell kant 420. DA lissprinten 22 har tvingats ned i urtagningen 409a farhindrar lassprintens 22 samverkan med kanten 4 (se figur 9) en iterforande och losgorande vridning av huset 200 relativt medbringaren 400. During the initial phase of the coupling rotational movement, the spring-loaded lashing pin 22 will be forced down into the recess 409a (see Figure 9), as shown in Figure 21, while the engaging rollers 10 are caused to pass the recesses 718. In the direction of the nearest slip lug, the recess 409a of a substantially radial edge 420. The lash pin 22 has been forced down into the recess 409a preventing the interaction of the load pin 22 with the edge 4 (see Figure 9) an iterating and loosening rotation of the housing 200 relative to the carrier 400.

Under fortsatt vridrorelse intrader lassprinten 22 i urtagningen 413 och kamrullarna 14, som foljer kamspdren 217, 218, intrader i det mellanliggande kampartiet 225, varvid kamsparens 217, 218 bakre kamkurvor 221 bringas att pdverka kamrullarna 14 sd att en del av operatorens applicerade vridkraft pa handtagen 11 overfars via huset 200 och kolvstycket 500 till en axiell, framitriktad tryckkraft pi kolven 600. Under inverkan av denna framdt- riktade tryckkraft tvingas kolven 600 att rora sig relativt medbringaren 400 i riktning mot handelen 2. Under denna rorelse kommer foljaktligen en gaspassage mellan kolven 600 och medbringaren 400 att oppna sig, varvid hondelens 1 genomstrOmningskanal oppnas. Samtidigt kommer kolven 600 att piverka kolven 800 med en axiell tryckkraft, som, di den overvinner tryckkraften frin tryckfjadern 21, bringar aven en gaspassage mellan kolven 800 och huset 700 att oppna sig, varvid aven genomstromningska- nalen genom handelen 2 oppnas. I detta lage kan sdledes gas passera genom kopplingsanordningen. Den gaspassageoppnande rorelsen fortsatter till dess att kamrullarna 16 14, genom vridrorelsens forsorg, kommer i kontakt med kamsparens 217, 218 frdmre andytor 222, i vilket ldge kopplingsanordningen är i sitt maximalt oppna ldge, sasom visas i figur 24 och mera detaljerat i figur 27. During continued rotation, the load pin 22 enters the recess 413 and the cam rollers 14 following the cam grooves 217, 218 enter the intermediate cam portion 225, causing the cam cam 217, 218 rear cam curves 221 to actuate the cam rollers 14 so that some of the operator's applied torque to the handles 11 is transferred via the housing 200 and the piston piece 500 to an axial, forward thrust force on the piston 600. Under the influence of this forward thrust force, the piston 600 is forced to move relative to the carrier 400 in the direction of trade 2. During this movement, a gas passage between the piston 600 and the carrier 400 to open, whereby the flow channel of the female part 1 is opened. At the same time, the piston 600 will actuate the piston 800 with an axial compressive force, which, in overcoming the compressive force of the compression spring 21, also causes a gas passage between the piston 800 and the housing 700 to open, whereby also the flow channel through the trade 2 is opened. In this layer, gas can thus pass through the coupling device. The gas passage opening movement continues until the cam rollers 16 14, through the rotation of the cam, come into contact with the front end faces 222 of the cam spare 217, 218, in which the coupling device is in its maximum open length, as shown in Fig. 24 and in more detail in Fig. 27.

For att stdnga gaspassagen mellan hondelen 1 och handelen 2 och bryta kopplingen, vrider operatoren huset 200 i en andra, kopplingslosgbrande vridrerelse, som är motsatt den forsta, kopplande vridrorelsen, varvid kamrullarna 14 initialt bringas frdn de frdmre kampartierna 224 till de mellanliggande kampartierna 225 och varvid kamsparens 217, 218 frdmre kamkurvor 220 bringas att paverka kamrullarna 14 sa att den applicerade vridkraften overfors till en axiell, bakatriktad tryckkraft pa kolven 600 via kolv- stycket 500. Denna bakatriktade tryckkraft tvingar kolven 600 att rora sig relativt medbringaren 400 i riktning bort fran handelen 2. Under denna rarelse kommer foljaktligen gaspassagen mellan kolven 600 och medbringaren 400 att sluta sig, och under paverkan av tryckkraften frdn tryckfjddern 21 kommer samtidigt dven gaspassagen mellan kolven 800 och huset 700 att sluta sig, varvid genomstromningskanalen genom hondelen 1 och genomstromningskanalen genom handelen 2 stdngs. To stop the gas passage between the female part 1 and the trade 2 and break the coupling, the operator rotates the housing 200 in a second, coupling-releasing rotational movement, which is opposite the first, coupling rotational movement, the cam rollers 14 being initially brought from the front cam portions 224 to the intermediate cam portions 225 and the front cam curves 220 of the cam spare 217, 218 are caused to actuate the cam rollers 14 so that the applied torque is transmitted to an axial, rearward thrust on the piston 600 via the piston piece 500. This rearward thrust forces the piston 600 to move relative to the carrier 400 in the direction away from Accordingly, during this operation, the gas passage between the piston 600 and the carrier 400 will close, and under the influence of the compressive force from the compression spring 21, the gas passage between the piston 800 and the housing 700 will also close, the flow channel through the female part 1 and the flow channel through the trade 2 stdngs.

Denna andra vridrorelse fortsdtter till dess att kamrul- larna 14 intrdder i de bakre kampartierna 217, 218, ingreppsrullarna 10 intrdder i urtagningarna 718 och lassprinten 22 bringas i kontakt med kanten 420, varvid en fortsatt vridrorelse forhindras genom lassprintens 22 samverkan med denna kant 420. I detta ldge ska kolven 600 bilda ett gastdtt forband med medbringaren 400 och kolven 800 ska pa samma sdtt bilda ett gastdtt forband med huset 700. Det kan dock intrdffa att ndgot av dessa forband inte sluter helt tdtt. T.ex. kan nagot frdmmande foremal hamna mellan kolven 600 och medbringaren 400 eller mellan kolven 600 och huset 800, eller sd kan ndgon av ringtdt- ningarna 16 och 18 vara skadade. I sddana fall är det 17 onskvart att kopplingen mellan handelen 1 och handelen 2 uppratthalls, eftersom en lesgaring av kopplingen kan in- nebara ett okontrollerat gaslackage till omgivningen. This second rotational movement continues until the cam rollers 14 enter the rear cam portions 217, 218, the engaging rollers 10 enter the recesses 718 and the load pin 22 is brought into contact with the edge 420, a further rotational movement being prevented by the load pin 22 cooperating with this edge 420. In this case, the piston 600 should form a gas-tight connection with the carrier 400 and the piston 800 should in the same way form a gas-tight connection with the housing 700. However, it may happen that some of these connections do not close completely tightly. For example. some damaging object may end up between the piston 600 and the carrier 400 or between the piston 600 and the housing 800, or some of the ring seals 16 and 18 may be damaged. In such cases, it is unfortunate that the connection between the trade 1 and the trade 2 is maintained, since a reading of the connection can involve an uncontrolled gas leakage to the surroundings.

Sasom har beskrivits ovan har urtagningarna 718 ett for- utbestamt djup. Da ingreppsrullarna 10 Or i urtagningarna 718 kommer foljaktligen en spalt 25 att bildas mellan andytan 401 och stadytan 719 (se figurer 9, 15 och 26) och saledes mellan medbringaren 400 och huset 700, sasom vi- sas i figur 26, vilken spalt 25 har en bredd som motsva- rar djupet has urtagningarna 718. Detta, i sin tur, innebar att eventuell gas, som lacker fran forbandet mellan kolven 600 och medbringaren 400 eller fran forbandet mellan kolven 800 och huset 700, kommer att stramma ut genom spalten 25, vidare ut genom utrymmet 28 mellan huset 200 och huset 700 och slutligen ut genom utrymmet 29 mellan skyddsringen 6 och huset 700 (se figur 26), vilken stromningspassage saledes bildar en lackagekanal for fluidet, dvs. for gasen i det har fallet. Detta gor det mojligt for opera-Laren att upptacka ett eventuellt gaslackage in- nan kopplingen mellan handelen 1 och handelen slutgiltigt bryts. Laget da ingreppsrullarna 10 vilar i urtagningarna 718 bildar saledes ett gaslackageindikerande lage has kopplingsanordningen och lassprintens 22 samverkan med kanten 420 sakerstaller att den kopplingslosgorande vrid- rorelsen inte automatiskt kan passera detta gaslackageindikerande lage. As described above, the recesses 718 have a predetermined depth. Accordingly, when the engaging rollers 10or in the recesses 718 form a gap 25 between the face surface 401 and the city surface 719 (see Figures 9, 15 and 26) and thus between the carrier 400 and the housing 700, as shown in Figure 26, the gap 25 has a width corresponding to the depth of the recesses 718. This, in turn, means that any gas which leaks from the joint between the piston 600 and the carrier 400 or from the joint between the piston 800 and the housing 700 will flow out through the gap 25, further out through the space 28 between the housing 200 and the housing 700 and finally out through the space 29 between the protective ring 6 and the housing 700 (see figure 26), which flow passage thus forms a lacquer channel for the fluid, i.e. for the gas in it has fallen. This makes it possible for the operator to detect any gas leakage before the connection between the trade 1 and the trade is finally broken. The layer when the engaging rollers 10 rest in the recesses 718 thus form a gas leakage indicating layer has the coupling device and the interaction of the load pin 22 with the edge 420 ensures that the coupling detaching rotary movement cannot automatically pass this gas leakage indicating layer.

Da operatoren har forsakrat sig am att inget gaslackage foreligger, hojer han lassprinten 22 genom att manovrera spaken 24, varvid lassprinten 22 bringas att ga fri fran kanten 420. Operatarens kopplingslosgorande vridrorelse av huset 200 relativt handelen 1 kan sedan fortga till dess att ingreppsrullarna 10 hamnar mitt for klackarna 410, varvid bajonettkopplingen mellan handelen 1 och han- 1 8 delen 2 upphor, varefter operatoren kan losgora kopplingen mellan hondelen 1 och handelen 2 genom att fera hondelen 1 bort fran handelen 2 i axiell riktning. Since the operator has ensured that there is no gas leakage, he raises the loading pin 22 by maneuvering the lever 24, causing the loading pin 22 to release from the edge 420. The operator's disengaging rotational movement of the housing 200 relative to the handle 1 can then continue until opposite the lugs 410, the bayonet coupling between the trade 1 and the male part 2 ceases, after which the operator can detach the coupling between the female part 1 and the trade 2 by moving the female part 1 away from the trade 2 in the axial direction.

Kopplingsanordningen uppvisar saledes dels ett fersta, stangt kopplingslage, dar kopplingsdelarna 1, 2 är frikopplade fran varandra och dar ventilerna, dvs. kolvarna 600, 800, är anordnade att ferhindra fluidpassage genom kopplingsdelarnas 1, 2 genomstromningskanaler, dels ett andra, oppet kopplingslage, dar kopplingsdelarna 1, 2 är fluidtatt ferbundna med varandra och dar ventilerna 600, 800 är anordnade att medge fluidpassage genom genomstromningskanalerna. Enligt uppfinningen uppvisar kopplingsanordningen dessutom ett tredje kopplingslage, dar venti- lerna 600, 800 är anordnade att forhindra fluidpassage genom genomstramningskanalerna, men dar kopplingsdelarna 1, 2 är forbundna med varandra under bildande av en fluidlackagekanal, som är anordnad att styra och kontrollerat leda eventuellt fluidlackage, som lacker fran flagon av kopplingsdelarna 1, 2, ut fran kopplingsanord- ningen sa att enkel detektering av namnda eventuella fluidlackage medges under det att kopplingsdelarna 1, 2 fortfarande är forbundna med varandra. Om opera-Laren upptacker att ett lackage fareligger kan han enkelt aterfora kopplingsanordningen till det andra kopplingslaget, sa att fluidlackaget till omgivningen stoppas. The coupling device thus has a first, rod coupling type, where the coupling parts 1, 2 are disengaged from each other and where the valves, ie. the pistons 600, 800, are arranged to prevent fluid passage through the flow channels of the coupling parts 1, 2, and a second, open coupling layer, where the coupling parts 1, 2 are fluidly connected to each other and where the valves 600, 800 are arranged to allow fluid passage through the flow channels. According to the invention, the coupling device further has a third coupling layer, where the valves 600, 800 are arranged to prevent fluid passage through the flow-through channels, but where the coupling parts 1, 2 are connected to each other to form a fluid leaching channel, which is arranged to control and control any fluid leakage. , which paints from the flake of the coupling parts 1, 2, out of the coupling device so that easy detection of said possible fluid leakage is allowed while the coupling parts 1, 2 are still connected to each other. If the operator discovers that a leak is dangerous, he can easily return the coupling device to the second coupling layer, so that the fluid coating to the surroundings is stopped.

Uppfinningen har ovan beskrivits utifran en specifik utforingsform. Det inses emellertid att andra utforingsfor- mer ryms mom uppfinningens ram. Det inses t.ex. att det tredje kopplingslaget kan astadkommas pa en mangd olika satt mom ramen for uppfinningen. Ett exempel pa en annan typ av kopplingsanordning, som skulle kunna forses med det tredje kopplingslaget, visas i SE 507753 C2. Det in- ses aven att kopplingsanordningen inte nodvandigtvis maste vara utrustad med en lasanordning motsvarande la- 19 sanordningen 23, men att en sadan lasanordning är foredragen, eftersom det sakerstaller att kopplingsanordningen inte kan foras direkt Iran det andra kopplingslaget till det forsta kopplingslaget utan ett mellanlig- gande stopp i det tredje kopplingslaget. Det inses dessu- tom att en sadan lasanordning kan realiseras pa en mangd olika satt. The invention has been described above on the basis of a specific embodiment. It will be appreciated, however, that other embodiments fall within the scope of the invention. It is realized e.g. that the third coupling layer can be achieved in a variety of ways within the scope of the invention. An example of another type of coupling device, which could be provided with the third coupling layer, is shown in SE 507753 C2. It is also understood that the coupling device does not necessarily have to be equipped with a welding device corresponding to the welding device 23, but that such a welding device is preferred, since it is obvious that the coupling device cannot be fed directly to the second coupling layer to the first coupling layer without an intermediate - stopping in the third coupling layer. It is also understood that such a reading device can be realized in a variety of ways.

Claims

A bayonet coupling type coupling device for establishing a fluid connection between a first container and a second container, which coupling device comprises a first coupling part (1) for connection to the first container and a second coupling part (2) for connection to the second container, which first coupling part (1) comprises: 1. a first flow channel for the fluid, and - a first valve (600) placed in the first flow channel, which is arranged to allow fluid passage through the first flow channel only if the first coupling part (1) is fluid-tight connected to the second coupling part (2), and which second coupling part (2) comprises: 2. a second flow channel for the fluid, and 3. a second valve (800) located in the second flow channel, which is arranged to allow fluid passage through the second the flow channel only when the second coupling part (1) is fluidly connected to the first coupling the part (2), which coupling device has a first coupling layer, where the coupling parts (1, 2) are disengaged from each other and where the valves (600, 800) are arranged to prevent fluid passage through the flow channels, and a second coupling layer, where the coupling parts (1, 2) are fluidly connected to each other and the valves (600, 800) are arranged to allow fluid passage through the flow channels to allow fluid communication between the containers, characterized in that the coupling device is designed to ensure that a coupling-releasing rotational movement can not automatically pass between for the rotational movement, and that this ldge constitutes a third coupling layer (at 718), where the valves (600, 800) are arranged to prevent fluid passage through the flow channels, but where the coupling parts (1, 2) are connected to each other to form a fluid lacquer channel (25). , 28, 29), which is arranged to conduct optionally 21 fluid lacquers, which varnishes from any of the coupling parts (1, 2), out of the coupling device so that said possible fluid leakage can be detected before the coupling parts (1, 2) are disengaged from each other. Coupling device according to claim 1, characterized by a welding device (23), which prevents the coupling device from being moved from the second coupling layer to the first coupling layer without an intermediate stop in the third coupling layer. Coupling device according to claim 2, characterized in that the first coupling part (1) comprises: 1. a carrier (400), which has partly an axially through opening (405), which forms the front part of said first flow channel, and partly a front end surface (401) enclosing a front end opening (403) has said first flow channel, and 2. a predetermined plurality of circumferentially evenly distributed engaging rollers (10) for co-operation with the second coupling part (2), and by the second coupling part ( 2) comprises: 3. a housing (700), having on the one hand an axially through opening (706), which forms said second flow channel, and on the other hand a front end face (701), which encloses a front end opening (703) having said second flow channel, which housing (700) further has a support surface (719) facing the front opening (703) and an annular groove (714) formed in the housing (700) on its outside at a predetermined small distance from the housing (700) ) front an surface (701), so that a radial flange (715) is formed between the front end face (701) of the housing (700) and the groove (714), which flange (715) has a predetermined plurality of circumferentially evenly distributed radial and axially continuous flange openings. (716) for receiving engaging rollers (10) of the first coupling part (1) in the event of an axial movement between the coupling parts (1, 2), between which flange openings (716) the flange (715) has supporting surfaces 22 (717) which face away from the front end surface (701) of the housing (700) and which there are arranged to co-operate with the engaging rollers (10) during the first rotational movement of a joint between the coupling parts (1, 2) while forming a bayonet joint between the coupling parts (1, 2), partly a predetermined plurality and circumferentially evenly spaced recesses (718) provided therein in the support surfaces (717) for receiving the engaging rollers (10) during a portion of said first rotation, the engaging rollers (10), during said second coupling length, being arranged to cooperate a with the support surfaces (717) so that under the influence of an axial force generated by the engagement of the engagement rollers (10) with the support surfaces (717), cause the end surface (401) and the support surface (719) to fluidly cooperate with each other, and the engagement rollers (10 ), during said third coupling day, are arranged to cooperate with the recesses (718) to form a gap (25) between the end surface (401) and the support surface (719), which gap (25) forms a part of said fluid cover channel. Coupling device according to Claim 3, characterized in that the recesses (718) have a shape and a radius of curvature which correspond to the shape and the radius of curvature have the engaging rollers (10) and a depth in the range 1-5 mm. Coupling device according to any one of claims 3 and 4, characterized in that the recesses (718) are arranged in adjacent to the flow openings (716). Coupling device according to any one of claims 3-5, characterized in that the first coupling part (1) comprises a piston (600), which is arranged in the front end opening (403) of the first coupling part (1) for forming said first valve, and in that the second coupling part (2) comprises a piston (800), which is arranged in the front dowel (703) of the housing (700) to form said second valve. Coupling device according to any one of claims 2-6, characterized in that the lead device (23) comprises a manually operable lead pin (22), which load pin (22) is arranged to automatically enter a load lead at the beginning of the establishment of the fluid connection, and which load pin (22) must be manually brought from the oldest layer to an open layer before the coupling device can be brought from the third to the first coupling layer. A method of transferring a fluid between a first container and a second container by means of a coupling device comprising a first coupling part (1) connected to the first container and a second coupling part (2) for connection to the second container, which the first coupling part (1) comprises: 1. a first flow channel for the fluid, and 2. a first valve (600) located in the first flow channel, which is arranged to allow fluid passage through the first flow channel only if the first coupling part (1) is fluid. connected to the second coupling part (2), and which second coupling part (2) comprises: 3. a second flow channel for the fluid, and 4. a second valve (800) located in the second flow channel, which is arranged to allow fluid passage through the second the flow channel only when the second coupling part (1) is fluidly connected to the first coupling part (2), which method comprises steps a: 5. that the coupling device, from a first coupling day, where the coupling parts (1, 2) are disengaged from each other and where the valves (600, 800), in closed 1 days, are arranged to prevent fluid passage through the flow channels, are brought to a second coupling layer, where the coupling parts (1, 2) are fluidly connected to each other and where the valves (600, 800), in the open, are arranged to allow fluid passage through the flow channels to allow fluid communication between the containers, the coupling device, from the second coupling layer, brought to a third coupling position, where the valves (600, 800) are arranged to prevent fluid passage through the flow channels, but day. the coupling parts (1, 2) are connected to each other to form a fluid leaching channel (25, 28, 29), which is arranged to guide any fluid lacquer, which paints from any of the coupling parts (1, 2), out of the coupling device so that said possible fluid leakage can be detected, and - that the coupling device, if no fluid leakage is detected in the third coupling layer, is brought from the third coupling layer to the first coupling layer. A method according to claim 8, wherein bringing the coupling device from the first coupling layer to the second coupling layer comprises the steps: 1. that the coupling parts (1, 2) are brought into contact with each other by an inboard axial movement, and 2. that the coupling parts (1, 2) fluidly connected to each other and the valves (600, 800) are caused to be opened by an initial rotation of an inlet between the coupling parts (1, 2). The method of claim 9, wherein bringing the coupling device from the second coupling layer to the third coupling layer comprises the step of:

1. that the fluid-tight connection between the coupling parts (1, 2) is broken and the valves (600, 800) are brought to their closed layers by an inboard second rotational movement between the coupling parts (1, 2), which second rotational movement has a direction of rotation opposite to the direction of rotation. the first twisting motion. 7

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