NO131139B

NO131139B -

Info

Publication number: NO131139B
Application number: NO03013/71A
Authority: NO
Inventors: F It Garzotto
Original assignee: Rimar Spa
Priority date: 1970-08-22
Filing date: 1971-08-12
Publication date: 1974-12-30
Also published as: US3782003A; NL7111356A; NO131139C; ES198112Y; FR2104549A5; SE385922B; ES198112U; DE2140808A1; GB1368099A; BE771521A

Description

Avstengningsventil fortrinsvis bestemt for ventilasjonstromler og grovere gassledninger med høye krav til tetning. Shut-off valve preferably intended for ventilation drums and coarser gas lines with high requirements for sealing.

Denne oppfinnelse vedrører en avstengningsventil, fortrinsvis bestemt for-ventilasjonstromler og grovere gassledninger med høye krav til tetning, bestående This invention relates to a shut-off valve, preferably intended for ventilation drums and coarser gas lines with high sealing requirements, consisting of

av en i en ledning innsatt mellomvegg forsynt med en gjennomstrømningsåpning of an intermediate wall inserted in a line provided with a through-flow opening

utformet som sete for en ventiltallerken designed as a seat for a valve plate

båret av en på en dreibar aksel festet carried by one on a pivoting shaft attached

bærearm, samt organer for ventiltallerkenens manøvrering. support arm, as well as organs for the valve plate's maneuvering.

De fleste av hittil kjente avstengnings-ventiler som tjener dette formål har den Most of the previously known shut-off valves that serve this purpose have it

mangel at der kreves et relativt stort trykk lack that a relatively large pressure is required

for å oppnå tilstrekkelig tetning, hvorved to achieve adequate sealing, whereby

ventilelementene løper risiko før de defor-meres, hvorved den ønskede tetning brin-ges i fare. En ytterligere mangel ved disse the valve elements are at risk before they are deformed, thereby jeopardizing the desired seal. A further shortcoming of these

kjente konstruksjoner er at glidning mellom tetningsflatene lett oppstår, når ventiltallerkenen presses mot setet. En slik known constructions is that sliding between the sealing surfaces easily occurs when the valve plate is pressed against the seat. One like that

glidning kan skade tetningsflaten. Denne sliding can damage the sealing surface. This

mangel beror på vanskeligheten ved med shortage is due to the difficulty of with

kjente konstruksjoner å fordele jevnt det for tetningen nødvendige trykk på ventiltallerkenens anleggsflater. known constructions to evenly distribute the pressure required for the seal on the contact surfaces of the valve disc.

Foreliggende oppfinnelse går ut på å The present invention is based on

oppnå en enkel og robust konstruksjon, achieve a simple and robust construction,

hvorved de omtalte mangler elimineres. whereby the mentioned defects are eliminated.

Avstengningsventilen ifølge oppfinnelsen utmerker seg ved at ventiltallerkenen The shut-off valve according to the invention is distinguished by the fact that the valve disc

er bevegelig festet til den nevnte bærearm is movably attached to the aforementioned support arm

ved hjelp av en i ventiltallerkenens sentrum leddbart anbragt stang forsynt med by means of a rod in the center of the valve plate which is articulated and provided with

en mellom stangens festepunkt og den one between the rod's attachment point and it

nevnte bærearm innlagt trykkfjær, som — når ventiltallerkenen har nådd sin endestilling — ved å sammenpresses ved bære- said support arm embedded with a compression spring, which — when the valve plate has reached its end position — by being compressed by the support

armens fortsatte bevegelse bygger opp en sentralt virkende kraft, som på grunn av stangens bevegelige feste skaffer en jevnt fordelt tetningskraft langs ventiltallerkenens omkrets, samt at kraften til bærearmen overføres gjennom en på samme aksel festet hevarm, leddbart forbundet med en i sitt midtpunkt leddet styrearm, hvis annen ende er lagret i et fast punkt således plasert at de to deler av den i midtpunktet leddede styrearm ved ventiltallerkenens åpne stilling danner vinkel med hverandre og i ventiltallerkenens stengte stilling i hovedsaken ligger i rett linje med hverandre, hvorved den for ventiltallerkens omstilling nødvendige kraft omsettes i det leddede midtpunkt. the continued movement of the arm builds up a centrally acting force, which, due to the rod's movable attachment, provides an evenly distributed sealing force along the circumference of the valve plate, as well as the force being transferred to the support arm through a lifting arm attached to the same axle, articulately connected to a control arm articulated at its centre, whose other end is stored in a fixed point so positioned that the two parts of the control arm articulated at the center point form an angle with each other in the open position of the valve plate and in the closed position of the valve plate are essentially in a straight line with each other, whereby the force necessary for the adjustment of the valve plate is traded in the articulated midpoint.

Ved en fordelaktig utførelsesform for avstengningsventilen er en fjær på i og for seg kjent måte innspent mellom ventiltallerkenen og bærearmen, og denne fjær holder ventiltallerkenen i en sådan stilling, at glidning forhindres, når ventiltallerkenen går i sin anleggsstilling. In an advantageous embodiment of the shut-off valve, a spring is clamped in a manner known per se between the valve plate and the support arm, and this spring holds the valve plate in such a position that sliding is prevented when the valve plate moves into its installation position.

Setets tetningsflate er hensiktsmessig på kjent måte forsynt med en rundt setets tetningsflate forløpende opphøyet kam mot hvilken ligger an en på ventiltallerkenen anbragt elastisk tetning. The seat's sealing surface is appropriately provided in a known manner with a continuous raised ridge around the seat's sealing surface, against which an elastic seal placed on the valve plate rests.

Oppfinnelsen skal nu forklares nær-mere i tilslutning til tegningen, som viser et snitt gjennom en ventilasjonstrommel forsynt med en avstengningsventil ifølge oppfinnelsen. The invention will now be explained in more detail in connection with the drawing, which shows a section through a ventilation drum provided with a shut-off valve according to the invention.

På tegningen betegner 1 en ventilasjonstrommel forsynt med en mellomvegg 2 i hvilken er dannet en gjennomstrøm-ningsåpning 3. 3a betegner et sete for en In the drawing, 1 denotes a ventilation drum provided with an intermediate wall 2 in which a through-flow opening 3 is formed. 3a denotes a seat for a

ventiltallerken 4, som er båret av en på en the valve plate 4, which is carried by one on one

dreibar aksel 5 festet bærearm 6. 7 betegner en i ventiltallerkenens sentrum ved rotatable shaft 5 attached support arm 6. 7 denotes one in the center of the valve disc at

hjelp av et feste 8 leddbart anbragt stang. with the help of an attachment 8 articulated rod.

Stangen er svingbar i det nevnte feste om The rod is pivotable in the aforementioned attachment

en tapp 9. 10 betegner en mellom stangens a pin 9. 10 denotes an intermediate rod

7 festepunkt 9 og bærearmen 6 innlagt 7 attachment point 9 and support arm 6 inserted

trykkfjær, som i det viste tilfelle tenkes ut-ført som skivefjær. Når denne fjær sammenpresses ved bærearmens fortsatte bevegelse, frembringer den en sentral virkende kraft, som på grunn av stangens compression spring, which in the case shown is designed as a disc spring. When this spring is compressed by the continued movement of the support arm, it produces a central acting force, which, due to the rod's

bevegelige feste fremkaller en jevnt fordelt virkningskraft langs ventiltallerkenens movable fasteners induce an evenly distributed impact force along the valve plate

4 omkrets. 11 betegner en på akselen 5 festet hevarm, som er leddforbundet med en 4 circumference. 11 denotes a lifting arm attached to the shaft 5, which is articulated with a

i sitt midtpunkt 12 leddet styrearm 13. at its midpoint 12 joint control arm 13.

Dennes andre ende er lagret i et fast punkt Its other end is stored in a fixed point

14. Punktet 14 er således plasert at ved 14. Point 14 is thus placed that by

ventiltallerkens åpne stilling A danner de the valve disc's open position A forms them

to deler av den 1 sitt midtpunkt leddede two parts of the 1's midpoint articulated

styrearm 13 en spiss vinkel med hverandre control arm 13 an acute angle with each other

og i ventiltallerkens stengte stilling B i and in the valve plate's closed position B i

hovedsaken ligger i rett linje med hverandre. Den nødvendige kraft fremkalles i the main case lies in a straight line with each other. The necessary force is induced in

det viste tilfelle ved en leddbar opphengt the case shown in the case of an articulated suspension

trykkluftsylinder 15, hvis stempelstang 15a compressed air cylinder 15, whose piston rod 15a

er forbundet med styrearmens 13 leddede is connected to the steering arm's 13 joints

midtpunkt 12. Slaglengden av stempelstan-gen 15a er best således avpasset at styrearmens midtpunkt ved ventiltallerkens center point 12. The stroke length of the piston rod 15a is best adjusted so that the control arm's center point at the valve plate's

stengte stilling vil forskyve noe over den closed position will shift slightly above it

stilling den har når de to leddarmer ligger position it has when the two articulated arms lie

på en rett linje. Derved fremkalles en fordelaktig selvlåsning av styrearmen. 16 betegner en mellom ventiltallerkenen 4 og in a straight line. Thereby, an advantageous self-locking of the steering arm is induced. 16 denotes one between the valve disc 4 and

bærearmen 6 innspent fjær. Denne er bestemt til å holde ventiltallerkenen i en slik the support arm 6 clamped spring. This is intended to hold the valve disc in such a way

stilling, at glidning forhindres, når ventiltallerkenen går til sin anleggsstilling B. 17 position, that sliding is prevented when the valve plate moves to its installation position B. 17

betegner en opphøyet kam på setets tetningsflate 3a. Mot denne kam ligger an en denotes a raised ridge on the seat's sealing surface 3a. Against this ridge lies a

på ventiltallerkenen anbragt elastisk tetning 18. elastic seal 18 placed on the valve disc.

I stedet for den. foran nevnte trykkluftsylinder kan andre krefter utnyttes for Instead of it. in front of said compressed air cylinder, other forces can be utilized for

ventilens stengning f. eks. tyngdekraften the closing of the valve, e.g. gravity

eller motordrift. Også øvrige elementer kan or engine operation. Other elements can also

varieres innenfor rammen for beskyttelsen. is varied within the scope of the protection.

Claims

1. Shut-off valve preferably intended for ventilation drums and rougher

gas lines with high sealing requirements, consisting of an intermediate wall inserted in a line provided with a through-flow opening designed as a seat for a valve plate which is carried by a support arm attached to a rotatable shaft, as well as organs for the valve plate's maneuvering, characterized in that the valve plate ( 4) is movably attached to the aforementioned support arm (6) by means of a rod (7) articulated in the center of the valve disc (4) provided with a compression spring (10) inserted between the rod's attachment point (9) and the aforementioned support arm (6), which — when the valve disc (4) has reached its end position — by being compressed by the continued movement of the support arm (6) builds up a centrally acting force, which, due to the movable attachment (9) of the rod (7), provides an evenly distributed sealing force along the circumference of the valve disc and that the power to the support arm (6) is transmitted through a lifting arm (11) attached to the same axle (5) articulatedly connected to a control arm (13) articulated at its center point (12) whose other end is layer straight at a fixed point (14) positioned in such a way that the two parts of the control arm (13) articulated at the center point form an angle with each other in the open position (A) of the valve plate and in the closed position (B) of the valve plate are essentially in a straight line with each other , whereby the force required for the adjustment of the valve plate is converted into the articulated center point (12).

2. Shut-off valve according to claim 1, characterized by a spring (16) which is clamped in a known manner between the valve disc (4) and the support arm (6) and holds the valve disc in such a position that sliding is prevented when the valve disc moves to its installation position.

3. Shut-off valve according to claim 1, characterized in that the sealing surface (3a) of the seat is provided in a known manner with a raised ridge (17) extending around the sealing surface of the seat against which an elastic seal (18) placed on the valve plate (4) rests.