LT4863B

LT4863B - Dead-end clamp for an isulated overhead cable, especially a bundle-assembled overhead cable

Info

Publication number: LT4863B
Application number: LT2000084A
Authority: LT
Inventors: Esko Toelkkoe; Jarmo Harttunen
Original assignee: Ensto Sekko Oy
Priority date: 1999-09-16
Filing date: 2000-09-08
Publication date: 2001-11-26
Also published as: CZ20003361A3; AT500454A1; RU2597078C2; BG104764A; AT500454B8; PL342442A1; LT2000084A; EE200000443A; CZ298159B6; RU2233523C2; BG64407B1; PL201256B1; LV12614B; RO121066B1; FI107652B; FI19991965L; LV12614A; RU2597078C9; AT500454B1

Abstract

The present invention relates to a dead-end clamp for an insulated overhead cable, especially a bundle-assembled overhead cable, wherein the dead-end clamp comprises two metallic body parts (1 and 2), between which there are arranged some plastic elements (3 and 4) having some groove-shaped cross sections (10) for receiving the ends of the wires between the plastic members (3 and 4). The dead-end clamp further comprises a fastening bolt (5) for pressing to one another the body parts (1, 2) and the plastic members (3, 4) between them in order to block the ends of wires between the plastic members (3, 4), and a tension clip (6) incorporated in the clamp, by means of which the clamp is fastened on a hook or other fastening member on a wall or pole. The dead-end clamp is characterized by the fact that some prominences (11 and 12) of the clip (6) having a blocking hole (9) of variable extent protrude from the body parts (1 and 2) and that there are some increased cross-sections (7) which are dimensioned in relation to the blocking holes (9) so that said increased sections match the blocking holes (9) only at their increased end, and the own tension of clip (6) presses the clip branches against the prominences (11 and 12), said increased sections being located to the ends of the two branches of the tension clip (6).

Description

Išradimas skirtas izoliuoto antžeminio kabelio, ypatingai daugiagyslio antžeminio kabelio, galiniam gnybtui, susidedančiam iš dviejų metalinių korpuso dalių, tarp kurių esančios plastinės dalys turi latako formos dalis, skirtas priimti laidų galus tarp plastinių dalių, gnybto varžto, skirto suspausti korpuso dalis ir tarp jų esančias plastines dalis vienas link kitos, užrakinant laidų galus tarp plastinių dalių, ir įtempimo kilpos, sujungtos su gnybtu, kurios pagalba gnybtas gali būti užkabinamas ant kablio ar kito tvirtinimo elemento, esančio sienoje ar stulpe.FIELD OF THE INVENTION The present invention relates to an end terminal for an insulated ground cable, in particular a multi-core ground cable, consisting of two metal body parts, the plastic parts of which have duct-shaped parts for receiving wire ends between the plastic parts and the terminal screw the plastic parts towards each other by locking the ends of the wires between the plastic parts, and the tensioning loops connected to the clamp, by means of which the clamp can be hooked to a hook or other fastener on the wall or post.

Yra žinomi kabelių galiniai gnybtai, aprašyti 1997 metų Suomijos firmos Ensto Sekko Oy leidinyje Accessories for Low Voltage Distribution, kuriuose plastinės dalys buvo išlietos apie kilpos galus, šioms plastinėms dalims korpuse yra padarytos priėmimo ertmės. Tokia konstrukcija yra tinkama naudoti, esant mažoms įtempimo jėgoms, pavyzdžiui, prijungti vieną mažo skersmens laidą. Tačiau norint įtvirtinti storesnius daugiagyslius laidus, tenka naudoti galinį gnybtą, kuriame įtempimo kilpos galai yra išlieti ilgesni plastinės dalies, patalpintos ertmėje tarp korpuso dalių per visą korpuso ilgį, viduje. Tokia konstrukcija padidina gnybto storį, o kilpa su tvirtinimo elementais, išlietais apie ją, sudaro brangų komponentą.There are known cable terminals described in the 1997 edition of Accessories for Low Voltage Distribution by Ensto Sekko Oy, Finland, where plastic parts were molded around the ends of the loops, and these plastic parts are provided with cavities in the housing. Such a structure is suitable for use at low tension forces, for example, to connect a single small diameter wire. However, in order to secure thicker multi-core wires, it is necessary to use a terminal clamp in which the ends of the tensioning loop are extended longer inside the plastic part enclosed in the cavity between the housing parts over the entire length of the housing. This design increases the thickness of the clamp, and the loop with fasteners cast around it forms an expensive component.

Be to, JAV kompanijos Reliance Comm/Tec 1981 metų leidinyje Reliable Electric/Utility Products aprašytas galinis gnybtas, kurio korpusas susideda iš dviejų, esančių vienas kitame, pleištų, tarp kurių esančioje ertmėje yra suspaudžiamas viengyslio kabelio galas. Kilpa yra pagaminta iš nerūdijančio plieno vielos, kurios abu galai įtvirtinami angose, esančiose vieno iš pleišto elementų iškyšulyje. Šis galinis gnybtas taip pat tinka suspausti viengyslio kabelio galą. Naudoti nerūdijančio plieno vielą yra naudinga todėl, kad galinis gnybtas gali būti naudojamas aplinkose, jautriose korozijai.In addition, the 1981 issue of Reliable Electric / Utility Products, published by Reliance Comm / Tec in the United States, describes a terminal clamp consisting of two spaced apart wedges between which the end of a single-core cable is compressed. The loop is made of stainless steel wire with both ends secured in openings in the protrusion of one of the wedge elements. This terminal is also suitable for pinching the end of a single core cable. The advantage of using stainless steel wire is that the end clamp can be used in environments sensitive to corrosion.

Išradimo tikslas yra pateikti galinį gnybtą, tinkantį daugiagysliam kabeliui (dažniausiai susidedančiam iš 2-4 gyslų), ir kuriame abipusis korpuso ir kilpos pritvirtinimas išsprendžiamas paprastu ir ekonomišku būdu.The object of the invention is to provide a terminal terminal suitable for a multi-core cable (usually consisting of 2 to 4 cores), in which the mutual attachment of the housing and the loop is solved in a simple and economical way.

Šis tikslas įgyvendinamas šio išradimu, remiantis charakteristikomis, pateiktomis apibrėžties 1 punkte.This object is achieved by the present invention based on the features set forth in claim 1 of the definition.

Du išradimo įgyvendinimo variantai yra aprašyti išsamiau su nuoroda į pridedamus brėžinius, kuriuose:Two embodiments of the invention are described in more detail with reference to the accompanying drawings, in which:

Fig.1, 2 ir 3 pavaizduotas galinis gnybtas pagal pirmąjį išradimo įgyvendinimo variantą iš šono, galo ir viršaus;Figures 1, 2 and 3 are side, end and top views of an end clamp according to a first embodiment of the invention;

Fig.4 ir 5 pavaizduotas galinis gnybtas pagal antrąjį išradimo įgyvendinimo variantą iš šono ir galo (vaizdas iš viršaus toks pats kaip fig.3);Figures 4 and 5 are side and end views, respectively, of the end clamp according to a second embodiment of the invention (top view as in Figure 3);

Fig.6 pavaizduota padidinta galinio gnybto apatinė korpuso plokštelė 2 išFig. 6 shows an enlarged rear terminal plate 2 of the terminal block

I šono, plokštelė yra tinkama abiejuose jgyvendinimo variantuose;Side-by-side, the plate is suitable for both embodiments;

Fig.7 ir 8 pavaizduoti plastinių dalių 3, 4, tinkamų abiejuose įgyvendinimo variantuose, daliniai pjūviai iš vidinės pusės; irFigures 7 and 8 are partial sectional views of the plastic parts 3, 4 suitable for both embodiments; and

Fig.9 pavaizduotas padidintas trečiosios plastinės dalies 14, naudojamos fig.4 ir 5 įgyvendinimo variantuose, dalinis skerspjūvis (vaizdas iš viršaus atitinka fig.8, o iš vaizdas apačios skiriasi tik tuo, kad briauna 17 ir išėma 18 yra sukeistos vietomis. Plokštelės 20, parodytos fig.8 ir skirtos padidinti atsparumą slydimui tarp laidų galų ir metalo korpuso paviršių, yra nereikalingos vidurinėje plastinėje dalyje 14).Fig. 9 is an enlarged partial cross-sectional view of the third plastic part 14 used in embodiments 4 and 5 (the top view corresponds to Fig. 8 and the bottom view differs only in that the rib 17 and the notch 18 are interchanged. 8, which are intended to increase the slip resistance between the ends of the wires and the surfaces of the metal body, are unnecessary in the middle plastic part 14).

Galinis gnybtas pagal abu įgyvendinimo variantus turi dvi metalines korpuso dalis 1,2, tarp kurių yra plastinės dalys 3, 4, turinčios latako formos dalis 10, skirtas priimti neparodytus laidų galus tarp plastinių dalių 3, 4 arba tarp plastinių dalių 3, 14, 4. Variantas, pavaizduotas fig. 1-3, tinka kabeliams, turintiems tris ar daugiau laidų. Gnybto varžtas 5 praeina pro korpuso dalis 1, 2 ir tarp jų esančias plastines dalis 3, 4 (ir, galbūt, 14), siekiant suspausti dalis tarpusavyje ir sugnybti laidų galus tarp plastinių dalių. Jtempimo kilpos 6 dėka gnybtas gali būti užkabinamas ant kablio ar kito tvirtinimo elemento, esančio sienoje ar stulpe.The terminal terminal according to both embodiments has two metal housing parts 1,2, between which are plastic parts 3, 4, with gutter-shaped parts 10 for receiving non-exposed wire ends between the plastic parts 3, 4 or between the plastic parts 3, 14, 4 The variant shown in FIG. 1-3, suitable for cables with three or more wires. The terminal bolt 5 passes through housing parts 1, 2 and the plastic parts 3, 4 (and possibly 14) therebetween to clamp the parts together and clamp the ends of the wires between the plastic parts. The tensioning loop 6 allows the clamp to be attached to a hook or other fastener on a wall or post.

Iš abiejų korpuso dalių 1, 2 išsikiša kilpos 6 auselė 11, 12, turinti kintamo pločio pailgą fiksavimo angą 9. Parodytame pavyzdyje auselės 11, 12 yra tiesioginiai plokštelės pavidalo korpuso dalių 1, 2 tęsiniai ir turi rakto skylutės formos fiksavimo angas 9, kurių siauresnis galas yra nukreiptas link auselės išorinio galo. Abiejų jtempimo kilpos 6 šakų galuose yra sustorintos dalys 7, kurių matmenys fiksavimo angų 9 atžvilgiu yra parinkti taip, kad jos jeina į fiksavimo angas 9 tik ties jų platesniuoju galu. Kilpos 6 savaiminis spyruokliavimas spaudžia kilpos šakas prie auselių 11, 12 vidinių paviršių, tuo būdu kilpos 6 nuosavas svoris neturi jokios įtakos ir ji išlieka padėtyje, j kurią ji buvo jėga įstatyta, paprastai padėtyje, parodytoje fig.3, lygiagrečiai kabelio galams.A latch 6, 11, 12 of a loop 6 having a variable width elongated locking hole 9 protrudes from both housing parts 1, 2. In the example shown, lugs 11, 12 are direct extensions of plate-shaped housing parts 1, 2 and have keyhole locking holes 9 the tip is directed toward the outer end of the lug. The two ends of the tensioning loops 6 have sealed portions 7 at their ends which are dimensioned with respect to the locking openings 9 so that they enter the locking openings 9 only at their wider end. The self-springing of the loop 6 presses the loop branches against the inner surfaces of the lugs 11, 12, whereby the self-weight of the loop 6 has no effect and remains in the position it was forcefully applied to, typically in the position shown in FIG.

Auselės 11, 12 turi išėmas 13 (fig.6), skirtas priimti sustorintas kilpos galų dalis 7 fiksavimo angų 9 šiauresniame gale. Auselės 12, 13, išėmos 13 ir fiksavimo angos 9 yra išdėstyti ir suformuoti vieni kitų atžvilgiu tokiu būdu, kad, visiškai surinkus galinį gnybtą, kilpa 6 negali būti išimta iš jos vietos. Išėmus gnybto varžtą 5, korpuso dalys 1, 2 gali būti pasuktos tokiu būdu, kad kilpos 6 sustorintos galinėsThe tabs 11, 12 have recesses 13 (Fig. 6) for receiving the thickened parts of the loop ends 7 at the north end of the locking openings 9. The tabs 12, 13, the recesses 13 and the locking openings 9 are arranged and formed with respect to each other such that when the terminal clip is fully assembled, the loop 6 cannot be removed from its place. After removing the terminal bolt 5, the housing parts 1, 2 can be rotated such that the loops 6 are thickened at the rear

I dalys 7 gali būti įstatytos j vietą arba išimtos iš jų vietos, perkeliant sustorintą dalį 7 virš išėmos 13 briaunos link platesniojo angos 9 galo, kur ji gali praeiti pro angą.The I parts 7 may be inserted or removed from their position by moving the thickened part 7 over the rib 13 of the recess 13 towards the wider end 9 of the opening 9 where it may pass through the opening.

Aprašytaisiais atvejais kilpos 6 galiniai užlenkimai yra padaryti tokiu būdu, kad kilpos galai yra nukreipti vienas nuo kito. Alternatyviai, jie galėtų būti nukreipti vienas j kitą, šiuo atveju kilpos 6 šakų galai remtųsi j auselių 11, 12 išorinius paviršius. Be to, kilpos 6 galai gali būti ir tiesūs be jokių užlenkimų 8, šiuo atveju auselės 11,12 turėtų turėti būtinas užkabinimui dalis ar užlenkimus.In the cases described, the end folds of the loop 6 are made such that the ends of the loop are directed away from each other. Alternatively, they could be directed toward each other, in this case the ends of the loops 6 would rest on the outer surfaces of the tabs 11, 12. In addition, the ends of the loop 6 may also be straight without any folds 8, in which case the lugs 11,12 should have the necessary parts or folds for hooking.

Abiem jgyvendinimo atvejais plastinės dalys 3, 4, kurios remiasi į korpuso dalis 1, 2, yra suformuotos pleišto, nukreipto galinio gnybto traukimo kryptimi, pavidalu tokiu būdu, kad plastinės dalys 3, 4 platėja link įtempimo kilpos 6. Gnybto varžto kiaurymės 16 plastinėse dalyse 3, 4 ir galimoje trečioje plastinėje dalyje 14 yra pailgos traukimo kryptimi. Visos kiaurymės 16 plastinėse dalyse 3, 4, 14 turi skersinius kakliukus 19, kurie išlaiko gnybto varžtą 5 viename kiaurymės 16 gale iki to momento, kuomet kakliukas lūžta, veikiamas suspaudimo jėgos, ir leidžia korpuso dalims 1, 2 slysti link storesniojo pleištinių plastinių dalių 3, 4 galo. Be šio pleišto efekto, suspaudimas gali būti dar labiau efektyvesnis, jei latakuose 10 yra padaryti grioveliai ar dantukai. Trečioji plastinė dalis 14 tarp plastinių dalių 3, 4 turi dvi latako formos dalis 10 abiejuose priešinguose paviršiuose.In both embodiments, the plastic parts 3, 4 which rest on the housing parts 1, 2 are formed in the form of a wedge directed in the pulling direction of the terminal clamp, such that the plastic parts 3, 4 expand towards the tensioning loop 6. 3, 4 and possibly the third plastic part 14 are elongated in the pull direction. All the holes 16 in the plastic parts 3, 4, 14 have transverse pins 19 which retain the clamp bolt 5 at one end of the hole 16 up to the moment the pin breaks under the force of compression and allow the body parts 1, 2 to slide towards the thicker wedge plastic parts 3 , 4 ends. In addition to this wedge effect, compression can be even more effective if grooves or teeth are made in the gutter 10. The third plastic part 14 has, between the plastic parts 3, 4, two gutter-shaped parts 10 on both opposite surfaces.

Kiekviena plastinė dalis 3, 4, 14 turi išsikišančią briauną 17 gnybto varžto vienoje kiaurymės 16 pusėje, o atitinkamoje kiaurymės priešingos pusės vietoje išėmą 18, kuri priima gretimos plastinės dalies briauną 17. Dėl šios priežasties plastinėse dalyse 3,4,14, kurios yra viena virš kitos, esančios briaunos 17 padidina atsparumą slydimui tarp laidų galų, įeinančių į latakus 10, ir varžto, įeinančio j kiaurymę 16. Tuo pat metu plastinės dalys 3, 14, 4 yra nukreipiamos j tikslią padėtj viena prieš kitą.Each plastic part 3, 4, 14 has a protruding edge 17 on one side of the clamp bolt and a recess 18 at a corresponding position on the opposite side of the hole, which receives the edge 17 of the adjacent plastic part. the ribs 17 above the other increase the slip resistance between the ends of the wires entering the gutter 10 and the screw entering the gutter 16. At the same time, the plastic parts 3, 14, 4 are guided to one another in their exact position.

Turint aprašytosios konstrukcijos galinj gnybtą, įtempimo kilpa 6 gali būti pagaminta iš viengyslės nerūdijančio plieno vielos, kuri yra ilgaamžė net ir aplinkose, jautriose korozijai.With a terminal clamp of the design described, the tensioning loop 6 can be made of a single-wire stainless steel wire that is durable even in environments susceptible to corrosion.

Aprašytuose jgyvendinimo variantuose korpuso dalys ir plastinės dalys yra sujungtos tarpusavyje gnybto varžtu 5, kurio sriegis kontaktuoja su korpuso dalies 2 sriegine kiauryme 15 (fig.6) ir kurio galvutė remiasi j kitą korpuso dalį 1. Dalyse, kurios yra ilgesnės traukimo kryptimi, gali būti panaudoti ir du vienas po kito einantys gnybto varžtai 5.In the embodiments described, the housing parts and the plastic parts are interconnected by a clamping screw 5 having a thread contacting the screw hole 15 of the housing part 2 (Fig. 6) and having its head resting on the other housing part 1. two successive terminal screws were used 5.

Kaip matyti fig.7-9, ypač - fig.8, latako formos dalių 10 dugne yra skersiniai išlenkti ar V formos grioveliai, kurie yra pakreipti latako išilgine kryptimi ir sudaro smailų kampą su normalia plokštuma, statmena latako išilginei ašiai. Griovelių briaunos yra aštrios, siekiant suformuoti dantytą suspaudimą, o griovelių gylis mažėja, slenkant nuo latako 10 centro link latako kraštų.As shown in Figs. 7-9, in particular in Fig. 8, the bottom of the gutter portions 10 has transverse curved or V-shaped grooves which are inclined in the longitudinal direction of the gutter and form a pointed angle with a normal plane perpendicular to the longitudinal axis of the gutter. The groove edges are sharp to form a serrated compression, and the groove depth decreases as it slides from the center of the gutter 10 toward the gutter edges.

įgaubta griovelių šoninė briauna ar V formos elemento vidinė briauna yra įtempimo kilpos pusėje (fig.8 - plokštelių 20 pusėje), o tai reiškia, kad šios briaunos priims traukimo jėgą, kurią joms perduos laidas. Laido paviršius yra spaudžiamas link centrinės srities, t.y. link latakų 10 dugno, ir įsiskverbia j griovelių vidų. Tai ne tik pailgina griovelių sukabinimo linijų ilgį, bet ir užtikrina iš esmės geresnį sukabinimą, nei vertikalūs grioveliai, išdėstyti normalioje plokštumoje, statmenoje latako išilginei ašiai. Optimalus smailus kampas tarp griovelių išlinkio plokštumos ir normalios latako plokštumos yra 30-50°, tinkamiausias - apie 45°. Grioveliai gali būti suformuoti, pavyzdžiui, frezavimu, pakreipiant frezavimo jrankj j padėtį, atitinkančią šj kampą.the concave side edge of the grooves or the inside edge of the V-shaped member is on the side of the tensioning loop (Fig. 8 on the side of the plates 20), which means that these ribs will receive the pulling force transmitted to them by the wire. The surface of the wire is pressed toward the central region, i.e. towards the bottom of gutter 10, and penetrates into the interior of the grooves. Not only does this extend the length of the groove coupling lines, but it also provides substantially better coupling than vertical grooves located in a normal plane perpendicular to the longitudinal axis of the gutter. The optimum acute angle between the curvature of the grooves and the normal plane of the gutter is 30-50 °, most preferably about 45 °. The grooves may be formed, for example, by milling by tilting the milling tool to a position corresponding to this angle.

Claims

DEFINITION OF INVENTION

An end terminal of an insulated ground cable, in particular a multi-core ground cable, having two metal housing parts (1,2), including plastic parts (3, 4) with duct-shaped parts (10) for receiving wire ends between plastic parts (3, 4), a clamping screw (5) for clamping the housing parts and the plastic parts between them to lock the ends of the wires between the plastic parts, and a tensioning loop (6) connected to the clamp hooked to a hook or other fastener on a wall or post, characterized in that the two tabs (11, 12) having elongated variable-width locking openings (9) protrude from both parts of the housing (1, 2) at the ends of the branches of the loop (6) there are thickened portions (7) whose dimensions with respect to the locking openings (9) are selected such that they can enter the locking openings (9) only at their wider end; lobe branches at the ears (11,12).

End terminal according to Claim 1, characterized in that the locking openings (9) taper towards the outer ends of the lugs (11, 12) and the ends of the branches of the loop (6) are curved in the direction of each other or towards each other.

3. Terminal clamp according to claim 1 or 2, characterized in that the plastic parts (3, 4) which rest on the housing parts (1, 2) are formed in the form of a wedge directed in the direction of pulling the terminal clamp so that the plastic parts (3, 4) extends towards the tensioning loop (6) and that the holes (16) of the clamp bolt (5) are elongated in the pulling direction.

End terminal according to any one of claims 1 to 3, characterized in that the housing parts (1, 2) and the plastic parts (3, 4) are interconnected by a terminal screw (5) having a thread contacting the thread of the housing part (2). in the hole (15) and the head resting on the other part of the housing (1).

End terminal according to any one of claims 1 to 4, characterized in that one side of the hole (16) made in the plastic parts (3, 4) for passing the terminal bolt (5) has a protruding edge (17) and a corresponding hole (16). ) on the opposite side, a recess (18) which receives the edge (17) of the adjacent plastic part.

6. End terminal according to claim 1 or 2, characterized in that the tensioning loop (6) is a single-strand stainless steel wire.

End terminal according to any one of claims 1 to 6, characterized in that between the two plastic parts (3,4) there is a third plastic part (14) having on both sides two duct-shaped parts (10) and an elongated part therebetween. in the pulling direction, a hole (16) for passing the terminal bolt (5).

8. Terminal clamp according to claim 3 or 7, characterized in that the clamp screw bore (16) has a transverse pin (19) which retains the clamp screw (5) at one end of the bore (16) until the pin (19) breaks, is subjected to compression forces and allows the housing parts (1, 2) to slide towards the thicker end of the wedge-shaped plastic parts (3,4).

End terminal according to claim 1, 2 or 6, characterized in that the tabs (11, 12) have recesses (13) for receiving thicker loop end portions (7) in the area of the north end of the locking openings (9), 12), the recesses (13) and the locking openings (9) are arranged and formed with respect to each other such that when the terminal clip is fully assembled, the loop 6 cannot be removed from its place.

End terminal according to any one of claims 1 to 9, characterized in that the bottom of the gutter portions (10) has transverse curved or V-shaped grooves having a curved or V-shaped tilt in the longitudinal direction of the gutter and forming an acute angle with the normal plane. , perpendicular to the longitudinal axis of the gutter.

11. End terminal according to claim 10, characterized in that the groove edges are sharp to form a serrated compression and the depth of the grooves decreases as it slides from the center of the gutter (10) towards the gutter edges.

12. Terminal clamp according to claim 10 or 11, characterized in that the concave side edge of the grooves or the inner edge of the V-shaped element is on the side of the tensioning loop (6) and receives the pulling force transmitted to them by the wire.

13. End terminal according to any one of claims 10 to 12, characterized in that the optimum angular angle between the curvature of the grooves and the normal plane of the gutter (10) is 30-50 °, most preferably about 45 °.