DE102006062609A1 - Cable feedthrough and/or insertion component for mechanical sealing and/or clamping and electrical shielding and/or conducting in e.g. breathable or non-breathable cable, has sections sealing and/or clamping, conducting and shielding cable - Google Patents

Abstract

The component (3) has sealing and/or clamping, conducting and shielding sections (31, 32, 33) for function of sealing and/or clamping, conducting and shielding, in connection with a bolting connection (1) and a cable. The component is made of an elastic material with the sections of different mechanical stability and electrical conductivity. The shielding and conducting sections are electrically connected together, where the elastic material contacts with a cable shielding in an unresistant manner.

Description

The invention relates to an element for mechanical sealing and / or clamping and electrical shielding and / or conduction in breathable and non-breathable cable, hose penetrations or cable connectors for mechanically and hydroscopically dense through or insertion of a shielded or unshielded electrical cable with / without strain relief / without bending protection for this cable according to main patent 'Cable bushing with diaphragm valve', patent application no. DE 10 2005 035 210.3 v. Jul 28, 2005.

Electric wire-, Hose penetrations or cable connectors in closed Housing, with and without strain relief, also water- and explosion-proof Type and with / without electromagnetic shielding with / without bending protection classified according to protection class, are known from the prior art. Such cable glands are also known among others technical and commercial terms, such as cable / line implementation, -Passage device, -Durchführungsverschraubung, -Passage device, introduction, introduction device, Insertion fitting, insertion device, -Crewing, hose fitting, etc.

such Cable, hose penetrations or cable connectors are needed for a wide variety of applications and are shaped accordingly diverse. you will be each intended use made of plastic and / or metal, include additional washers and / or gaskets / seals / grommets and different strain reliefs as required, such as squeezing or Clamp. Cable, hose penetrations or cable connectors and / or their individual parts are standardized; in the installation technology such bushings or connections become old Type under the name Panzerrohrgewinde (Pg) -Verschraubung with non-metric thread, Pg7 ... Pg48, according to new design with metric thread M12 ... M63, traded.

Electric wire-, Hose penetrations or cable connectors exist from a section cylinder with mostly two-sided thread and a stop that seals the seal to a wall forms. To attach either the conclusion with bolted to the wall - the conclusion contains Holes drilled - or the cylinder becomes wall back / housing side screwed with a counter / locknut. On the side of the cable / hose inlet There is either a cable grommet with gasket and washer and / or a molded or loose cable claw, wherein the cable / Hose is squeezed sealingly by a cap nut, or too a screw clamp with seal and molded Biegeschutz. These accessories are known as Sealing Nipples and Dummy plugs / screw plugs, also cable through or called insertion element.

The Applications range from connection, switching and Distribution boxes of installation / device technology of building system and plant engineering up to applications aerospace, traffic engineering and maritime applications. Due to the variety of applications, the above description not deepened.

In terms of The description of the prior art is based on the detailed Representation in the parent application referred to and in the following the description of cable entry or entry elements limited.

According to main patent 'cable bushing with diaphragm valve', patent application no. DE 10 2005 035 210.3 , a breathable cable / hose feedthrough for the mechanical and hydroscopic sealing of a shielded or unshielded electrical cable with / without strain relief with / without bending protection for this cable is presented. It has been described that cable penetrations are classed by design, according to the old type with non-metric thread Pg7 ... Pg48 and new design with metric thread M12 ... M63, whereby the measure for the mounting hole for the cable gland - dimension of the threaded connection, bottom - and the cable diameter for this cable bushing are coordinated.

The German disclosure DE 10 2004 014 512 presents a non-breathable cable gland, consisting of a connectable with a housing screw connection, a seal insertable in the interior of the nozzle and a screwed to the nozzle pressure element which exerts on the seal inwardly directed pressure acting on the cable, and a Shield contact element which is in electrical connection with the connecting piece and the cable shield freed from the cable sheath. The shield contact element consists of an elastic ring part, which is arranged within the screw connection.

By the chosen structure - pressure element, cable clamp insert, Seal, shield contact insert, screw connection - results a large variety of parts; mechanical fixation and electrical contact are given.

The German patent DE 103 56 386 provides a - also not breathable - screw for sealed cable glands in front. A pressure screw with axial passage opening is screwed to a double nipple, wherein within the resulting hollow cylindrical volume, a sealing insert with at least one cable gland and an electrically conductive membrane or disc made of plastic and / or metal - also with at least one cable gland - is.

The variety of parts is also large - pressure screw, sealing insert, membrane / disc, double nipple; according to 2 In the application, the mechanical fixation of the membrane / disc and the electrical contacting made by the same difficult and unsafe.

The German disclosure DE 196 15 602 / European patent specification EP 803 953 also provides a non-breathable, sealing cable gland, the cable entry side consisting of an insertable into the interior of the nozzle seal and a screwed with the nozzle pressure element which acts on the seal on an imported cable, and a housing side latched metallic shield contact element whose finger-like V -shaped contacts lie on the screen of a stripped cable.

The Carrier part with its finger-shaped contacts is very expensive to produce and builds quite large, which refers to the structure of the cable gland. Due to the finger-like structure of the contact is not enveloping SMV shielding given.

The German utility model DE 297 17 440 describes a cable bushing for electrical cable with a feedthrough housing and a passage channels for cable / lines having sealing unit of an electrically non-conductive elastic molded part, which is insertable into the bushing housing. Stripped shielded cables are guided with jacket so through the molding that the cable sheath is flush with the molding, the shield is bent outwards around the molding and plugged the molding and the cable strand in the bushing housing. In this case, the cable shield between the outer surface molding and inner surface metal bushing housing forms a conductive connection.

It remains unclear what forces on the sealing unit when applying the screw nut act; continue to be no information about it given how the molding seals when the assembly of the same done by cable incomplete and / or unbalanced.

All shown and / or presented solutions are suitable not or only conditionally for use as a cable duct or -einführungselement for mechanical sealing and / or clamping and electrical shielding and / or directing; in the prior art are the functions sealing, clamping, shielding and routing to multiple components inside the cable, hose leadthrough or cable plug connection distributed.

Of the The invention is therefore based on the object, a device according to the preamble of claim 1, an element for sealing, clamping, shields and conduct in breathable or non-breathable cable, tube feedthroughs or cable connectors for mechanical and hydroscopic sealing Passing or inserting a shielded or unshielded electrical cable with / without strain relief with / without bending protection to create for this cable.

These The object is achieved by an easy Handleable cable entry or entry element for sealing and / or terminals and screens and / or conduct of the type mentioned solved with the characterizing features of claim 1. In advantageous embodiments, the dependent claims Reference.

According to the present invention is a passage / introduction element for cable, hose feedthroughs or cable plug connections proposed, which consists of several materials with sections different strengths and Leiffähigkeiten in one piece is made.

One Another embodiment of the invention provides that the Pass-through / insertion element for cable and hose feedthroughs or cable connectors is designed so that it as universal component is used.

A Another form of the inventive novelty is in that the cable passage / insertion element for breathable and non-breathable cable and hose feedthroughs or cable connectors can be used.

A Another form of the inventive novelty is given by the fact that the passage / introduction element for cable, hose feedthroughs or cable plug connections is suitable for shielded and unshielded cables.

The advantages achieved by the invention consist in the cost-effective manufacturability of the cable passage / - introduction element, associated with lower storage costs and in the ease of handling and assembly of the same in connection with cable, hose penetrations or cable connectors as components as well as in applications within the installati onstechnik.

preferred Embodiments of the subject invention are in shown in the drawings and will be closer in the following described. Show it

1 Example of a cable entry / insertion in perspective

2 Cut through cable entry / entry, wireless, unloaded

3 Section through the cable entry / entry, cable - tipped, loaded.

Same and equivalent components of the embodiments are each provided with the same reference numerals in the figures.

The Description of the device according to the invention will continue based on the explanations of the pictures.

How out 1 As can be seen, the cable entry / inlet consists of a screw connection piece, which can be screwed on one side into a housing bore with a non - threaded seal / O - ring with counter / lock nut or thread, and a pressure element resembling a cap nut pierced for the cable entry.

2 shows an example of a section through the wireless and thereby unloaded cable through - / - introduction.

The cable entry / entry is made up of a screw connection 1 , a printing element 2 and a cable penetrating / introducing element 3 together.

The screw connection 1 has an approximately centrally located - with respect to its longitudinal extent - stop 11 for case mounting - often knurled or hexagonal; the attachment in the housing can by means of through-hole and counter / lock nut 15 or housing thread - each with sealing / O-ring 13 provided - done.

Furthermore, the screw connection 1 on the opposite side of the housing attachment over another external thread 14 , which serves to receive a printing element. The hollow cylindrical body tapers towards the cable entry; in the place of rejuvenation 16 the nozzle has a locking ring 17 , Often, this threaded half radially distributed over the circumference extending in the axial direction longitudinal cuts on that of the nose 18 give a degree of elasticity. The thread outlet 14 the nose 18 closes with the chamfer 19 from.

The pressure element 2 - resembling a head-pierced cap nut - has an internal thread 21 , a cable entry / entry 22 and an inside, above the thread running chamfer 23 ,

The one-piece cable entry / entry element 3 has a sectional structure and begins - seen from the Kabeleinföhrung - with a hollow cylindrical body - the sealing / clamping section 31 - Is on the outside with the tapered inner diameter of the fitting in accordance, its transition to the next section, a catch 34 as a counterpart to the detent ring 17 having the neck; the cable feed / insertion element 3 is so in the fitting 1 fixed. The inner diameter of the sealing / clamping section 31 is sized so that the resulting hollow cylinder the cable 4 including cable sheath 41 receives.

The sealing and clamping section 31 closes the ladder section 32 on, a likewise hollow cylindrical body whose outer diameter coincides with the inner diameter of the nozzle in place. The inner diameter or the inner cylinder of this section is dimensioned so that it from the cable sheath 41 freed cables 4 can record. The ladder section 32 is at least on its outer surface to the inner surface of the nozzle 1 towards electrically conductive and has with this outgoing to zero electrical surface resistance. The subsequent elastic shield section 33 of the cable feed / insertion element 3 is conical with tapered wall thickness towards the cable outlet, with the aim that the screen section 33 lip-like around the braid 42 of the shielded and cut to length cable. The screen section 33 is formed electrically conductive.

The one-piece cable entry / entry element 3 points in the section 31 a sealing and clamping function, in the section 32 the function of electric conduction and in the section 33 the electric screen function. The element 3 may be a one-piece, but multi-component molded plastic part; an electrical conductivity in the section 31 is not important.

3 shows a section through the cable through - / - introduction, equipped with a cable, loaded.

The cable 4 has an outer shell - a cable sheath 41 - between this and another insulation layer 43 conduct one electrically the screen 42 - Usually designed as a screen braid - and within the inner hollow cylindrical insulation a number of cable strands 44 , consisting of electrical conductors 46 each with basic insulation 45 ,

When screwing the pressure element 2 with the fitting 1 with prefabricated inserted cable 4 With each additional - corresponding to the direction of rotation - a rotational force over the chamfer 23 of the pressure element on the chamfer 19 of the screw connection 1 exercised, reducing the power over the nose 18 on the sealing / clamping section 31 of the cable feed / insertion element 3 is transmitted, which causes the elastic cable sheath 41 of the cable 4 clamped and sealed.

The elastically shaped hollow cone of the umbrella section 33 of the cable feed / insertion element 3 nestles flush with the braided shield 42 of the cable 4 and thus forms an electrically conductive lead over the conductor section 32 on the electrically conductive screw connection 1 or the grounded electrical enclosure.

The cable feed-through element 3 with its sections and functions is a universal component and so it can equally be introduced into cable, Schlauchdurchföhrungen or cable connectors, with the use as a shielded conductive cable hose an additional support ring with sealing and clamping function in the region of the section 31 of the element 3 is to be provided.

A Another embodiment of the invention provides that it is in the thread of the threaded neck not necessarily metric Thread must act - to be considered is Panzerrohrgewinde (Pg) - so that the inventive Novelty also as spare / supplementary component use place.

A Another form of the inventive novelty is given that the pressure element is not screwed, but holding fast, sealing by additional O-ring is connected to the screw connection.

A Another innovation is given by the fact that the housing side Threaded connector of the screw connection not screwed, but holding fast, by additional O-ring sealing with the Wall of the housing is connected.

A further advantageous embodiment of the invention results from that with the cable through / - introduction element formed cable, hose leadthrough or cable plug connection in their assembly no situation installation regulation is subject.

A Another embodiment of the invention provides that the cable formed with the cable feed / insertion element, Hose feedthrough or cable connector as a stackable cable entry module used in control cabinet construction.

The numerous possibilities and advantages of the design The invention is reflected in the number of property rights claims contrary.

1

fitting body

11

attack

12

external thread casing

13

Sealing / O-ring (not shown)

14

external thread pressure element

15

Counter / locknut (not shown)

16

rejuvenation

17

locking ring

18

nose

19

chamfer

2

pressure element

21

inner thread

22

Cable - / - introduction

23

chamfer

3

Transit / inserter

31

Sealing / clamping section

32

conductor section

33

screen section

34

latching

4

electric wire

41

cable sheath

42

braided shield

43

isolation

44

cable strand

45

isolation

46

ladder

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 102005035210 [0001, 0007]
• - DE 102004014512 A [0008]
• - DE 10356386 [0010]
• - DE 19615602 A [0012]
• - EP 803953 [0012]
• DE 29717440 U [0014]

Claims (10)

Element for mechanical sealing and / or clamping and electrical shielding and / or conduction in breathable or non-breathable cable, hose penetrations or cable connectors for mechanically and hydroscopically dense through or insertion of a shielded or unshielded electrical cable with / without strain relief with / without bending protection for this Cable according to our main patent 'Cable bushing with diaphragm valve', patent application no. DE 10 2005 035 210.3 v. Jul 28, 2005, characterized in that the cable penetrating / introducing element ( 3 ) made of several materials with sections ( 31 . 32 . 33 ) of different mechanical strengths and electrical conductivities is made in one piece. Element for sealing, clamping, shielding and / or conducting in cable, hose feedthroughs or cable plug connections according to claim 1, characterized in that the cable feed-through element ( 3 ) at least one section each for the functions sealing / clamping ( 31 ), Umbrellas ( 33 ) and conducting ( 32 ) in conjunction with the screw connection ( 1 ) and the cable ( 4 ), wherein the sections screens and conductors are also electrically connected to each other. Element for sealing, clamping, shielding and / or conducting in cable, hose feedthroughs or cable plug connections according to at least one of Claims 1 and 2, characterized in that the cable feed-through element ( 3 ) at least one electrically conductive portion ( 33 ) made of elastic material, with the cable shield ( 42 ) contacted almost without resistance. Element for sealing, clamping, shielding and / or conducting in cable, hose feedthroughs or cable plug connections according to at least one of Claims 1 to 3, characterized in that the cable feed-through element ( 3 ) at least one electrically conductive portion ( 32 . 31 ) made of a material, which with the screwed connection ( 1 ) contacted almost without resistance. Element for sealing, clamping, shielding and / or conducting in cable, hose feedthroughs or cable plug connections according to at least one of Claims 1 to 4, characterized in that the cable feed-through element ( 3 ) at least one section ( 31 ) made of a material which is in contact with the cable sheath ( 41 ) mechanically clamps and seals. Element for sealing, clamping, shielding and / or conducting in cable, hose feedthroughs or cable plug connections according to at least one of Claims 1 to 5, characterized in that the cable feed-through element ( 3 ) at least one additional cable sheath ( 41 ) comprises a hollow cylindrical ring which performs the functions of sealing and clamping. Element for sealing, clamping, shielding and / or conducting in cable, hose penetrations or cable plug connections according to at least one of claims 1 to 6, characterized in that the threads ( 12 . 14 . 21 ) of the cable, hose leadthrough or cable connector are not metric. Element for sealing, clamping, shielding and / or conducting in cable, hose penetrations or cable plug connections according to at least one of claims 1 to 7, characterized in that the mechanical connections of the screw connection ( 1 ) not screwing ( 12 . 15 . 14 . 21 ), but are executed latching, with additional seal by sealing / O-ring ( 13 ). Element for sealing, clamping, shielding and / or conducting in cable, hose feedthroughs or cable plug connections according to at least one of claims 1 to 8, characterized in that the cable entry / exit element ( 3 ) formed cable, hose feedthrough or cable connector in their assembly is not subject to any installation instructions. Element for sealing, clamping, shielding and / or conducting in cable, hose feedthroughs or cable plug connections according to at least one of Claims 1 to 9, characterized in that the cable entry / exit element ( 3 ) formed cable, hose feedthrough or cable connector is lined up.