DK141519B - Explosion-proof cable entry. - Google Patents
Explosion-proof cable entry. Download PDFInfo
- Publication number
- DK141519B DK141519B DK420573A DK420573A DK141519B DK 141519 B DK141519 B DK 141519B DK 420573 A DK420573 A DK 420573A DK 420573 A DK420573 A DK 420573A DK 141519 B DK141519 B DK 141519B
- Authority
- DK
- Denmark
- Prior art keywords
- cable
- explosion
- cable entry
- proof cable
- stud
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/06—Joints for connecting lengths of protective tubing or channels, to each other or to casings, e.g. to distribution boxes; Ensuring electrical continuity in the joint
- H02G3/0616—Joints for connecting tubing to casing
- H02G3/0625—Joints for connecting tubing to casing with means for preventing disengagement of conductors
- H02G3/0683—Joints for connecting tubing to casing with means for preventing disengagement of conductors with bolts operating in a direction transverse to the conductors
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
- Installation Of Indoor Wiring (AREA)
- Connector Housings Or Holding Contact Members (AREA)
- Cable Accessories (AREA)
Description
(11) FREMLÆ66 ELSESSKRIFT 1^+1519 DANMARK mln, cl·3 H 02 0 3/22 §(21) Ansøgning nr. 4205/73 (22) Indleveret d«n 31. Jul. 1973 (23) Løbedaø 31. Jul. 1973 (44) Ansøgningen fremtogt og fremlaeggelsesskriftet offentBggjort den 8. apr . 198Ο(11) SUBMISSION 66 ELSCRIPTION 1 ^ + 1519 DENMARK mln, cl · 3 H 02 0 3/22 (21) Application No. 4205/73 (22) Filed on 31 Jul. 1973 (23) Løbedaø 31 Jul. 1973 (44) The application presented and the petition made public on 8 April. 198Ο
Dl REKTORATET FORDl THE RECTORATE FOR
PATENT-OG VAREMÆRKEVÆSENET 0°) Prioritet begreret ta de«PATENT AND TRADEMARKET 0 °) Priority limited to the «
11. aug. 1972, 11914/72, CHAug 11 1972, 11914/72, CH
<71> ALFRED GROSSAUER, 5502 Hunzenscftwil, CH.<71> ALFRED GROSSAUER, 5502 Hunzenscftwil, CH.
(72) Opfinder: Samme.(72) Inventor: Same.
(74) Fuldmægtig under sagens behandling:(74) Plenipotentiary in the proceedings:
Internationalt Patent-Bureau.International Patent Office.
(64) Eksplosions sikker kabelgennemføring.(64) Explosion-proof cable entry.
Opfindelsen angår en eksplosionssikker kabelgennemføring til en vag, indeholdende en tilslutningsstuds med udvendigt gevind i den ene ende til indskruning i en åbning i væggen og med udvendigt gevind i den anden ende, hvorpå der er skruet en sikringsstuds, hvorhos der i tilslutningsstudsen er anbragt en tætning og i sikringsstudsen midler til kablets trakaflastning og til sikring mod relativ drejning af de to studser, hvilke midler er fastholdt ved hjælp af kun med specialnøgle udløselige skruer.BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to an explosion-proof cable entry to a vague containing an external threaded connector for one end to be screwed into an opening in the wall and an external thread at the other end to which a securing connector is screwed, wherein a seal is provided in the connector. and, in the fuse slot, means for relieving the cable tension and for securing relative rotation of the two pins, which means are retained by means of specially lockable screws only.
Fra DE PS nr. 907.548 kendes en kabelgennemføring med en studs, der indskru-es i et gevind i et hus. Ved indskruningen sammenpresses en tætningsring, hvorved der skaffes den fornødne tætning. Trækaflastning opnås med et klemorgan, der fastholdes på studsen med skruer, hvis betjening kræver specialnøgle. Klemorganet har et fremspring, der i organets monterede stilling sikrer studsen mod drejning i 2 141519 forhold til haset. fra DE fxemlsggelsesskrift nr. 1.127.428 kendes desuden en kabelgennemføring, hvor der til trækaflastning på stadsen, der sikrer tætning, anbringes to skålformede klemstykker, der sammenspændes om kablet med skruer, hvis betjening kræver specialnøgle. Klemstykkerne har fremspring, der i stykkernes monterede stilling sikrer mod drejning i forhold til huset.From DE PS No. 907,548 there is known a cable feed with a stud which is screwed into a thread in a housing. At the screw-in, a sealing ring is compressed, thereby providing the necessary seal. Tensile relief is achieved with a clamping means that is retained on the plug with screws whose operation requires a special key. The clamping member has a projection which in the mounted position of the member secures the plug against rotation in relation to the can. Furthermore, from DE Application No. 1,127,428, there is known a cable feed, in which, for tension relief on the site, which ensures sealing, two bowl-shaped clamping pieces are fastened together on the cable with screws, the operation of which requires a special key. The clamps have projections which, in the mounted position of the pieces, protect against rotation with respect to the housing.
For begge disse kendte konstruktioner gælder, at en løsning af skruerne medfører, at såvel trækaflastningen som drejningssikringen og dermed tætningen ophæves.For both of these known constructions, a solution of the screws means that both the tensile relief and the rotation protection and thus the seal are lifted.
Den foreliggende opfindelse har til opgave at tilvejebringe en eksplosions-sikker kabelgennemføring af den nævnte art, som giver større grad af sikkerhed mod utilsigtet åbning end kendte kabelgennemføringer.The object of the present invention is to provide an explosion-safe cable entry of said kind, which provides a greater degree of security against accidental opening than known cable penetrations.
Ifølge opfindelsen opnås dette ved, at midlerne til trækaflastning og midlerne til drejningssikring udgøres af to separate elementer, der er fastholdt med hver sine skruer.-Herved opnås, at hvis f.eks. trækaflastningselementet løsnes, er trækaflastningen stadig i det mindste delvis sikret ved hjælp af tætningselementet, og for at kunne afspænde dette ved relativ drejning af studserne må drejningssikringselementet først løsnes. Hvis omvendt først drejningssikringselementet løsnes, forhindrer trækaflastningselementet i sikringsstudsen og tilslutningsstudsens tætningselement, der ligeledes virker trækaflastende, og altså fastklem-mende på kablet, en lille indbyrdes drejning af de to studser og dermed, at kabelgennemføringen bliver utæt.According to the invention, this is achieved by the means for tensile relief and the means for turning protection being made up of two separate elements which are retained with each of its screws. If the tension relief element is released, the tensile relief is still at least partially secured by the sealing element, and in order to be able to relax this by the relative rotation of the studs, the rotation protection element must first be released. On the other hand, if the pivot locking element is first loosened, the tension relief element in the fuse socket and the sealing element of the connecting rod, which also acts to relieve tension, and thus clamping on the cable, prevent a small mutual rotation of the two studs and thus leakage of the cable passage.
Opfindelsen forklares nærmere i det følgende under henvisning til den skematiske tegning, hvor fig. 1 viser en kabelgennemføring set fra siden i løst monteret tilstand, delvis i aksialt snit og med visse dele fjernet, fig. 2 et i forhold til fig. 1 90° drejet sidebillede, delvis i aksialt snit og fig. 3 et tværsnit efter linjen III-III i fig. 1.The invention is explained in more detail below with reference to the schematic drawing, in which fig. 1 shows a side view of a cable feed in a loosely mounted condition, partly in axial section and with certain parts removed; FIG. 2 shows a relation to FIG. 1 90 ° turned side view, partly in axial section and fig. 3 is a cross-sectional view taken along line III-III of FIG. First
På tegningen er vist en metallisk tilslutningsstuds 1, der udvendigt, omtrent ved midten, har en sekskantet flange la, der skiller en første studsdel Ib med udvendigt gevind til indskruning i en med gevind forsynet åbning i væggen i et ikke vist apparathus fra en anden studsdel lc med udvendigt gevind. En ringformet not ved overgangen mellem studsdelen lb og den sekskantede flange la indeholder en O-ring 2. Tilslutningsstudsen 1 og dermed hele kabelgennemføringen kan på sædvanlig måde, f.eks. ved hjælp af låsemøtrikker, fikseres i husets væg. På studsdelen lc er påskruet en som sekskantet møtrikdel udformet endedel 3a af en sikkerhedsstuds 3, hvis anden ende er afsluttet i en trompetlignende udvidelse 3b af den art, som sædvanligvis benyttes til bevægelige kabeltilslutninger. I det i forhold til resten af studsens boring radialt udvi- 141519 3 dede indre rum i den med indvendigt gevind forsynede møtrikdel 3a er der ved hjælp af en udvendig endeflange 4a understøttet et metalhylster 4, hvis anden ende har en indadrettet konusflade 4b, og som rager ind i det udvidede indre rum i studsdelen lc. Den som følge af udvidelsen af det indre rum i tilslutningsstudsen 1 dannede skulder ld har en konuaflade, der er spejlvendt i forhold til endefladen 4b af metalhylsteret 4. De to flader 4b og ld danner trykflader,mellem hvilke en i det udvidede indre rum i studsdelen lc indsat tætningsbøsning 5 af gummielastisk materiale og med tilsvarende koniske endeflader sammenpresses aksialt, hvorved den trykkes radialt indad mod det ikke viste kabel. Den således sammentrykkede tætningsbøsning 5 virker som følge af klemae-virkningen trækaflastende på kablet. Sikkerhedsstudsen 3 har et segmentformet udsnit 3f, der strækker sig ind til studsens akse, og i hvis område studsen 3 er forsynet med en vulst 3c , udformet som en halv ring* På den diametralt over for udsnittet 3f liggende bagside af vulsten 3c har denne en forsænket flad del 3e, som er parallel med aksialfladen af endefladen 3d af denne vulst, og soa flugter med en af fladerne på den sekskantede møtrikdel 3a. I forsænkningen i den flade del 3e ligger en sikkerhedsrigel 6, der over den tilhørende flade på møtrikdelen 3a griber ind over en passende flade på den sekskantede flange la, der ved rigtigt sammenskruede studser 1 og 3 er koncentrisk med møtrikdelen 3a. Ved hjælp af en skrue 7, hvis trekantede hoved 7a ligger forsænket i et udtag 6a i rigelen 6, er denne sikret mod drejning på studsen 3. Herved er de to studser 1 og 3 sikret mod relativ drejning. I udsnittet 3f på studsen 3 er der desuden indsat en tværrigel 8, hvis indre flade, der rager ind i lysningen af studsens indre rum, og som i en tværflade er konkavt hvælvet, danner to aksialt oven over hinanden liggende klemvulste 8a, som fastklemmer kablet i studsen og bevirker en træksikring. Tværrigelen 8 er ved hjælp af to skruer 9, hvis trekantede hoveder 9a ligger forsænket i udtag 8b i rigelen 8, fastgjort til vulsten 3c og dermed til studsen 3.In the drawing, a metallic connector nozzle 1 is shown, which exteriorly, approximately at the center, has a hexagonal flange 1a separating a first stud portion 1b with an external thread for screwing into a threaded opening in the wall of a second housing portion not shown. lc with external thread. An annular groove at the junction between the stud portion 1b and the hexagonal flange 1a contains an O-ring 2. The connector nozzle 1 and thus the entire cable entry can be used in a conventional manner, e.g. by means of locking nuts, fix in the wall of the house. On the stud portion 1c is screwed an end portion 3a formed of a hexagonal nut portion of a safety stud 3, the other end of which is terminated in a trumpet-like extension 3b of the kind usually used for moving cable connections. In relation to the radially expanded inner space relative to the rest of the bore of the stud in the internally threaded nut part 3a, a metal casing 4 is supported by an outer end flange 4, the other end of which has an inwardly directed cone surface 4b and which protrudes into the expanded interior space of the stud portion lc. The shoulder ld formed as a result of the expansion of the inner compartment in the connecting stud 1 has a cone surface which is flush with the end surface 4b of the metal casing 4. The two surfaces 4b and ld form pressure surfaces between which one in the expanded inner compartment of the stud part 1c, sealing sleeve 5 of rubber elastic material and with corresponding tapered end faces is axially compressed thereby pressing it radially inwardly against the cable not shown. The sealed sleeve 5 thus compressed causes tension relief on the cable due to the clamping effect. The safety spigot 3 has a segment-shaped cutout 3f which extends to the axis of the stud and in whose area the cutter 3 is provided with a bead 3c, formed as a half ring * On the diametrically opposite side of the cutout 3f, this has a recessed flat portion 3e which is parallel to the axial surface of the end surface 3d of this bead, and so flush with one of the surfaces of the hexagonal nut portion 3a. In the recess in the flat part 3e lies a safety latch 6, which engages over the corresponding surface of the nut part 3a over a suitable surface of the hexagonal flange 1a, which, by properly screwed-in studs 1 and 3, is concentric with the nut part 3a. By means of a screw 7, the triangular head 7a of which is recessed in a socket 6a in the bolt 6, this is secured against rotation of the plug 3. Hereby the two studs 1 and 3 are secured against relative rotation. In addition, in section 3f of the plug 3, a transverse bolt 8 is inserted, the inner surface of which protrudes into the illumination of the inner space of the studs and which is concave in a transverse surface, forming two axially superposed clamping beads 8a which clamp the cable in the bounce and causes a pull-down. The transverse shaft 8 is secured to the bead 3c and thus to the socket 3 by means of two screws 9, the triangular heads 9a of which are recessed in recess 8b in the shaft 8.
Af foranstående ses at afsikringen eller åbningen af den beskrevne eksplosionssikre kabelgennemføring kræver en speciel trekantnøgle, og at løsgørelsen af kun den ene af de to rigeler 6 og 8 ikke er tilstrækkeligt til at ophæve trækaflastningen eller til at muliggøre en brydning af tætningen, dvs. den relative drejning af de to studser 1 og 3.From the foregoing it will be seen that the securing or opening of the described explosion-proof cable entry requires a special triangle key and that the release of only one of the two ridges 6 and 8 is not sufficient to cancel the strain relief or to allow a break of the seal, ie. the relative rotation of the two studs 1 and 3.
Det beskrevne eksempel er takket være den trompetformede udvidelse af sikkerhedsstudsen 3 egnet til bevægelige kabeltilslutninger. Hvis kabelgennemføringen er bestemt til faste kabeltilslutninger, kan den del af studsen 3, der. rager ud over tværrigelen 8, udelades.The example described is suitable for moving cable connections thanks to the trumpet-shaped extension of the safety pin 3. If the cable entry is intended for fixed cable connections, the part of the socket 3 may be. projecting beyond the transverse bolt 8 is omitted.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1191472A CH548125A (en) | 1972-08-11 | 1972-08-11 | CABLE ENTRY DEVICE. |
CH1191472 | 1972-08-11 |
Publications (2)
Publication Number | Publication Date |
---|---|
DK141519B true DK141519B (en) | 1980-04-08 |
DK141519C DK141519C (en) | 1980-09-29 |
Family
ID=4378107
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK420573A DK141519B (en) | 1972-08-11 | 1973-07-31 | Explosion-proof cable entry. |
Country Status (6)
Country | Link |
---|---|
AT (1) | AT342687B (en) |
BE (1) | BE803487A (en) |
CH (1) | CH548125A (en) |
DE (2) | DE7241019U (en) |
DK (1) | DK141519B (en) |
SE (1) | SE394552B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994018734A1 (en) * | 1993-02-12 | 1994-08-18 | Olaf Johannsen Aps | A cable lead-in |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2539456C3 (en) * | 1975-09-04 | 1982-05-27 | Martin 4352 Herten Hamacher | Cable entry |
DE3329388C2 (en) * | 1983-08-13 | 1987-04-02 | Elektro-Apparate KG Gothe & Co, 4330 Mülheim | Cable entry nozzles for explosion-proof electrical equipment |
NL8303796A (en) * | 1983-11-03 | 1985-06-03 | Wavin Bv | PLASTIC CABLE COVER. |
DE3340649A1 (en) * | 1983-11-10 | 1985-05-23 | Elektro-Apparate KG Gothe & Co, 4330 Mülheim | Cable entry gland for explosion-protected electrical devices |
DE3409958A1 (en) * | 1984-03-17 | 1985-09-26 | Fernsprech- und Signalbaugesellschaft mbH Schüler & Vershoven, 4300 Essen | Device for strain relief of a lead |
DE10105544A1 (en) | 2001-02-06 | 2003-01-09 | Endress & Hauser Gmbh & Co Kg | Grommet |
-
1972
- 1972-08-11 CH CH1191472A patent/CH548125A/en not_active IP Right Cessation
- 1972-11-09 DE DE19727241019 patent/DE7241019U/en not_active Expired
-
1973
- 1973-07-02 AT AT581373A patent/AT342687B/en active
- 1973-07-06 DE DE19732334398 patent/DE2334398C3/en not_active Expired
- 1973-07-31 DK DK420573A patent/DK141519B/en not_active IP Right Cessation
- 1973-08-10 BE BE134471A patent/BE803487A/en not_active IP Right Cessation
- 1973-08-10 SE SE7310999A patent/SE394552B/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994018734A1 (en) * | 1993-02-12 | 1994-08-18 | Olaf Johannsen Aps | A cable lead-in |
Also Published As
Publication number | Publication date |
---|---|
DE2334398C3 (en) | 1977-12-03 |
DE7241019U (en) | 1973-04-12 |
SE394552B (en) | 1977-06-27 |
BE803487A (en) | 1973-12-03 |
AT342687B (en) | 1978-04-10 |
DE2334398B2 (en) | 1977-04-21 |
DK141519C (en) | 1980-09-29 |
CH548125A (en) | 1974-04-11 |
DE2334398A1 (en) | 1974-02-21 |
ATA581373A (en) | 1977-08-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PBP | Patent lapsed |