DK167991B1

DK167991B1 - Cable gland

Info

Publication number: DK167991B1
Application number: DK241590A
Authority: DK
Inventors: Olaf Johannsen
Original assignee: Johannsen Olaf Aps
Priority date: 1990-10-05
Filing date: 1990-10-05
Publication date: 1994-01-10
Also published as: DK241590D0; DK241590A; DE4133025A1; DE4133025C2

Description

i DK 167991 B1in DK 167991 B1

Opfindelsen angår en kabelforskruning af den i krav l's indledning angivne art. Sådanne forskruninger anvendes f.eks. til kabelgennemføringer gennem vægge og til indføring af kabler i kabelmuffer. Ved montering af en sådan 5 kabel for skruning kan det hænde, at den ikke bliver skruet langt nok ind i bøsningen eller muffen til, at løgringspakningen udvides tilstrækkeligt til at blive bragt i sikkert tætningsanlæg mod kablet og bøsningen eller muffen.The invention relates to a cable gland of the kind specified in the preamble of claim 1. Such glands are used e.g. for cable penetration through walls and for insertion of cables into cable sleeves. When mounting such a cable for screwing, it may happen that it is not screwed far enough into the sleeve or sleeve for the onion ring gasket to expand sufficiently to be placed in a secure sealing system against the cable and sleeve or sleeve.

1010

Fra DE offentliggørelsesskrift nr. 2 334 398 kendes en kabelforskruning med en elastomer løgringspakning, samt henholdsvis en sekskantet nippel og muffe, som ved sammenskruning trykker løgringspakningen tæt sammen omkring 15 det kabel, der skal monteres. Kabel for skruningen har desuden en bøjle til med to skiver at spænde kablet fast i forskruningen og en særskilt sikringsrigel, der strækker sig aksialt over niplens og muffens sekskantflader og med en skrue kan spændes ind mod disse og derved fastlåse 20 niplen og muffen mod at dreje sig i forhold til hinanden. Bøjlen og sikringsriglen virker uafhængigt af hinanden, og kabelforskruningen har ingen midler til at sikre den korrekte sammentrykning af løgringspakningen.DE Publication No. 2,334,398 discloses a cable gland with an elastomeric sealing ring gasket, as well as a hexagonal nipple and sleeve, which when screwed together press the sealing gasket tightly together around the cable to be mounted. The screw for the screw also has a bracket for securing the cable to the screw with two washers and a separate locking bolt extending axially over the hexagonal faces of the nipple and sleeve and with a screw can be tightened against them, thereby locking the nipple and sleeve against turning in relation to each other. The bracket and the locking bolt operate independently of one another, and the cable gland has no means to ensure the correct compression of the on-ring gasket.

25 Opfindelsen har til formål at angive en kabelforskruning af den omhandlede art, som afhjælper den nævnte ulempe ved at formindske risikoen for ukorrekt montering, idet de med hager forsynede arme på selve bøjlen kun tillader dennes påsætning og tilspænding, når løgringspakningen er 30 korrekt sammentrykket, hvorved denne tilstand umiddelbart indikeres for montøren.The invention has for its object to provide a cable gland of the kind in question which alleviates the disadvantage of reducing the risk of improper mounting, with the hinged arms on the bracket only allowing its attachment and tightening when the locking gasket is properly compressed, thereby immediately indicating this condition to the installer.

Dette formål opnås ved, at kabelforskruningen er udformet som angivet i krav 1's kendetegnende del.This object is achieved by the cable gland being designed as defined in the characterizing part of claim 1.

Den i krav 2 angivne udformning forøger sikkerheden ved at gøre det umuligt at fuldføre monteringen, før løg- 35 DK 167991 B1 2 ringspakningen er bragt i tætnende tilstand.The design of claim 2 increases the safety by making it impossible to complete the assembly before the onion packing is brought in sealing condition.

Andre hensigtsmæssige enkeltheder ved kabelforskruningen ifølge opfindelsen er angivet i krav 3, 4 og 5.Other suitable details of the cable gland according to the invention are given in claims 3, 4 and 5.

55

Opfindelsen skal forklares nærmere i det følgende under henvisning til tegningen, hvor fig. 1 i dimetrisk afbildning viser en udførelsesform for 10 kabelforskruningen ifølge opfindelsen med de enkelte be standdele trukket bort fra hverandre, og fig. 2 viser kabelforskruningen anvendt til gennemføring af et kabel gennem en væg, dels i vandret snit, dels set 15 fra oven.The invention will be explained in greater detail below with reference to the drawing, in which 1 in a diagrammatic view shows an embodiment of the cable gland according to the invention with the individual components pulled apart, and fig. 2 shows the cable gland used for passing a cable through a wall, partly in horizontal section and partly seen from above.

• Den på tegningen viste kabelforskruning består af en nip-pel 10, en bøsning 11, en trækaflastningsbøjle 12 med fastspændingsskruer 13, en løgringspakning 14 og en mel- 20 lemlægsring 15.The cable gland shown in the drawing consists of a nipple 10, a bushing 11, a tension relief bracket 12 with clamping screws 13, an onion ring gasket 14 and an intermediate ring 15.

Niplen 10 har et sekskantet hoved 16 og et gevindstykke • 17, som kan skrues ind i bøsningen 11's gevindhul 18, samt et gennemgående hul 19 til optagelse af et kabel 20, 25 fig. 2. Nippelhovedet 16 er udformet med en tværkanal 21, som begrænses af to på nippelaksen vinkelrette flader 22 og to i det væsentlige i et aksialplan beliggende bundflader 23. Kun den ene af hvert af disse fladepar ses i fig. 1.The nipple 10 has a hexagonal head 16 and a threaded piece 17 which can be screwed into the threaded hole 18 of the sleeve 11, as well as a through hole 19 for receiving a cable 20, 25 fig. 2. The nipple head 16 is formed with a cross channel 21, which is limited by two faces 22 perpendicular to the nipple axis and two substantially bottom faces 23 located in an axial plane. Only one of each of these surface pairs is seen in FIG. First

30 I tværkanalen 21 kan aflastningsbøjlen 12 anbringes med glidepasning mellem bøjlens sidevægge 24 og kanalvæggene 22. Bøjlens underside kan derved spændes fast mod et i niplen anbragt kabel 20 ved hjælp af de to skruer 13, som 35 går gennem huller 25 i bøjlen ned i gevindhuller 26 i niplen.30 In the transverse channel 21, the relief hanger 12 can be fitted with a sliding fit between the side walls 24 of the hanger and the channel walls 22. The underside of the hanger can thereby be clamped against a cable 20 arranged in the nipple by means of the two screws 13 which pass through holes 25 in the hanger into threaded holes. 26 in the nipple.

3 DK 167991 B1 Bøsningen 11 har ligesom niplen et sekskantet hoved 27, der omslutter gevindhullet 18, og et gevindstykke 28, hvorpå der som vist i fig. 2 kan skrues en møtrik 29 til fastspænding af kabelforskruningen på en væg 30. Ved bun-5 den af det indvendige gevind 18 findes en ringformet, indadgående anlægsflade 31 for løgringspakningen 14, som således på almindelig kendt måde kan trykkes sammen mellem denne anlægsflade og enden af niplen 10's gevindstykke 17, når dette skrues ind i gevindhullet 18. Til over-10 . føring af trykket fra gevindstykket 17 til løgringspak ningen er der mellem disse anbragt mellemlægsringen 15 f.eks. af nylon med en glat overflade.3 DK 167991 B1 The sleeve 11 has, like the nipple, a hexagonal head 27 enclosing the threaded hole 18 and a threaded piece 28 on which, as shown in FIG. 2, a nut 29 can be screwed to clamp the cable gland on a wall 30. At the bottom of the internal thread 18 there is an annular, inward abutment surface 31 of the onion gasket 14, which can thus be compressed in a generally known manner between this abutment surface and the end. of the thread piece 17 of the nipple 10 as it is screwed into the thread hole 18. For over-10. passing the pressure from the thread piece 17 to the on-ring gasket, there are arranged between them the spacer ring 15 e.g. of nylon with a smooth surface.

Aflastningsbøjlen 12, som på almindelig kendt måde har to 15 med ribber udformede kabelanlægsflader, hvoraf den opad vendende i fig. 1 er betegnet med 32, til brug ved forskellige kabeltykkelser, har desuden ved hver ende en mod bøsningen vendende arm 33 med en hage 34 ved den frie ende. I færdigmonteret tilstand griber disse hager om bag 20 en sekskantet flange 35 på den indre ende af bøsningen 11's hoved 27. Hagens beliggenhed er således afpasset ef-' ter kabeldimension og løgringspakning, at aflastningsbøjlen ikke kan sættes på plads, før niplen er skruet så langt ind, at der opnås effektivt tætningsanlæg mellem 25 løgringspakningen, kablet og bøsningen.The relief bracket 12, which in the conventional manner has two 15 rib-shaped cable laying surfaces, the upward facing of FIG. 1 is indicated by 32, for use with various cable thicknesses, furthermore at each end has an arm 33 facing the bush with a hook 34 at the free end. When fully assembled, these hooks rear 20 engage a hexagonal flange 35 on the inner end of the sleeve head 11. The location of the hose is so adapted to the cable dimension and sealing gasket that the relief bar cannot be put in place until the nipple is screwed so far in that effective sealing system is obtained between the onion gasket, the cable and the bushing.

Ud over at sikre korrekt montering har armene 33 med hagerne 34 også den virkning at modvirke drejning af niplen 10 i forhold til bøsningen 11.In addition to ensuring proper mounting, the arms 33 with the hooks 34 also have the effect of counteracting the rotation of the nipple 10 relative to the bushing 11.

30 I den på tegningen viste udførelse anvendes kabelforskru-ningen som sagt i forbindelse med en kabelgennemføring gennem en væg, hvorfor bøsningen 11 har et gevindstykke 28 til optagelse af en møtrik 29. Kabelforskruningen kan 35 imidlertid også anvendes til andre formål, f.eks. til kabelindføring i en kabelmuffe, som så erstatter gevindstykket 28.30 In the embodiment shown in the drawing, as mentioned above, the cable gland is used in connection with a cable passage through a wall, therefore the sleeve 11 has a threaded piece 28 for receiving a nut 29. However, the cable gland 35 can also be used for other purposes, e.g. for cable insertion into a cable sleeve which then replaces the threaded piece 28.

Claims

1. Cable gland for tension relief and sealing around an electric cable (20) by means of a shackle (12) arranged in an upwardly open transverse channel (21) in a nipple (10), as with screws (13), which cooperates with threaded holes (26) in the nipple, can be clamped against the cable, partly a compression ring gasket (14) which can be compressed and thereby expand radially between an inner annular abutment surface (31) in a sleeve (11) or sleeve and the end of one to 15 screws into an internal thread (18) of the bushing or sleeve defined thread (17) on the nipple, the bracket being formed with one or more arms (33) facing the bushing or sleeve cooperating with the bushing or sleeve for preventing or at least limiting its rotation with respect to the nipple after the mounting of the bracket (12), characterized in that the arm (s) (33) is formed at the free end with a hook (34). , which is arranged to grip one on the bush (11) or sleeve a formed radial flange (35) when 25 and only when the onion gasket (14) is compressed to a predetermined desired degree.

Cable gland according to claim 1, characterized in that the bracket (12) is so guided in the cross-channel (21) 30 and so rigidly connected to the hook (s) (34) that it cannot be put in place before the bushing (11) or the sleeve is screwed so far over the nipple (10) that the chin (s) can engage the flange (35) of the bushing (11) or the sleeve. 35

Cable gland according to claim 1 or 2, characterized in that an arm (33) with a hook (34) is provided on each end of the hanger (12) and that the surfaces limiting the hooks are substantially parallel to the bracket clamping screws (13).

Cable gland according to claim 1, 2 or 3, characterized in that the flange (35) of the bushing (11) or the sleeve by which the chin (s) (34) engages is hexagonal.

The details of the embodiment shown and described can be changed in several ways within the scope of the invention. 5 --------------------

Cable gland according to any one of the preceding claims, characterized in that the hook or hooks (34) and the bushing (11) or sleeve have a set of flat, opposing faces at a sufficiently small spacing between the rotation of the nipple (10) relative to the bushing or sleeve after mounting the bracket (12) is substantially prevented. 20 25 30 35