DE102006034224B3 - Ventilated guide for sealed guiding of electric cable through opening in housing wall, includes outer hexagonal central component with aeration channel-forming holes and channels in lower part - Google Patents

Abstract

A ventilated cable-sheath guide has an outer hexagonal central part component (2) with aeration channel-forming holes (24) perpendicular to the introduction direction. Cylindrical hole extensions run into the central part interior, perpendicular to the holes, and enter the aeration channels of the lower part (3), which are holes running obliquely inwards. A guiding part ends in the middle part before the aeration channel outlet region. A ventilated cable-sheath guide has an outer hexagonal central part component (2) with aeration channel-forming holes (24) perpendicular to the introduction direction. Cylindrical hole extensions run into the central part interior, perpendicular to the holes, and enter the aeration channels of the lower part (3), which are holes running obliquely inwards. A guiding part ends in the middle part before the aeration channel outlet region, so that the aeration channel is shaped to retain a standard relationship between the cable diameter and the size of the guide fixing hole in a housing wall.

Description

The invention relates to a breathable cable / hose bushing for mechanically and one-sidedly hydroscopically performing a shielded or unshielded electrical cable with or without strain relief and with or without bending protection for this cable through an opening in a housing wall according to claim 2 of the main patent 'cable gland with diaphragm valve' . DE 10 2005 035 210 R1 v. Jul 28, 2005.

Cable / hose routes in closed housing, with and without strain relief, also water- and explosion-proof type and with or without electromagnetic shielding with or without Biegeschutz classified according to the protection class, are from the state of Technique known. Such cable glands are also known under other technical and commercial terms, such as cable / lead bushing, - bushing, --Durchführungsverschraubung, --Durchführungsvorrichtung, --Introduction, --Einführungseinrichtung, --Einführungsverschraubung, Introducer, --Grench, hose fitting, etc.

such Cable / hose penetrations are for different ones Applications needed and are correspondingly diverse formed. They are each intended use of plastic and / or metal made, contain additional Washers and / or seals / sealing rings / grommets and different strain reliefs as required, such as bruise or clamp. Cable glands and / or their individual parts are standardized; in the installation technology Cable glands old design under the name Panzerrohrgewinde (Pg) -Verschraubung with non-metric thread, Pg7 ... Pg48, according to new design with metric thread M12 ... M63, traded.

Cable / hose routes consist of a section cylinder with mostly double-sided thread and a stop which forms the sealing closure to a wall. For fastening either the end is screwed to the wall - the conclusion contains circumferential Drilling - or the cylinder becomes Wandungsrück- / housing side screwed with a counter / locknut. On the side of the cable entry gives it either a cable grommet with gasket and washer and / or a molded or loose cable claw, wherein the cable is squeezed by a cap nut sealing, or also a screw clamp with seal and molded cable bend protection. Accessories are known as sealing / strangulation nipple and blind plugs / plugs.

The Applications range from junction boxes, switch boxes and distribution boxes Installation / Device Technology the building system and plant engineering up to aerospace applications, the Traffic engineering as well as maritime applications. Because of the diversity The applications do not deepen the above rough description.

in the The following is the prior art related to the cable / line / hose penetrations appreciated.

Utility Model DE 91 10 007 / European patent specification EP 527,368 relates to a cable feedthrough device for electromagnetically dense passage of a shielded electrical cable through a partition opening with exposed in the implementation of a cable sheath electric screen and at least two radially attachable, electrically conductive part shells whose inner profile is adapted to the outer profile of the screen.

The Industrial property law concerns the electromagnetic shielding of cables and bushings.

According to German patent DE 102 23 198 / European patent EP 1 365 494 a metallic, at various pressure points of the cable sheath coated with plastic grommet on an electrical appliance, especially in a rail vehicle, presented, wherein the cable is passed through a cable guide tube and pressed at least on a contact surface by a pressure screw holding. The disclosure is limited to the explanation of the sealing grommet.

in the The following is the prior art related to the cable / line / hose entries appreciated.

The Austrian patent AT 266 241 envisages a cable entry with membrane push-through seal and hose clamp for tension and pressure relief. The upper part of the cable entry consists of the cable entry port and the molded, the cable sheath enclosing sealing membrane as a unit together. Furthermore, the cable entry port around the cable performed surrounded a hose clamp.

The molded membrane of the cable entry stub encloses the cable sheath thick; But has nothing in common with the tightness of the housing.

in the The following is the state of the art related to the cable / line / hose fittings appreciated.

The German utility model DE 76 22 470 introduces a cable gland with seal, strain relief and anti-rotation, which has a special geometric design for entry and implementation, sealing and strain relief of cables, wires and other fadenför shaped Good, with anti-rotation of the intermediate nozzle and the pressure screw in the assembled state. The hollow cylindrical, one-piece stub contains coaxially arranged clamping tongues on its active collar, which slide by means of obliquely mounted slots at back pressure by the pressure screw inside and thereby span the cable gently.

The integral with the intermediate piece clamping tongues allow due to their sliding together with axial back pressure a large clamping area. The publication gives no indication of a 'breathing' gland. The German patent application DE 694 13 494 European Patent 651,486 mentions improvements to aerospace cable gland gasket assemblies when passing pressurized into pressureless spaces, or vice versa, such that the previously inserted, cable-carrying and silicone rubber pressure-sealed elastomeric plugs pass through a gasket-receiving cable gland bushing replaced with partition housing.

The Pressure differences between the dividing walls far exceed the mentioned, atmospheric pressure conditions normal, industrial applications.

A high-pressure-resistant cable feedthrough, which is also inexpensive to produce and insensitive to shocks and temperature fluctuations, eg for oil-hydraulic devices or similar, is in the German utility model DE 89 05 733 presented, wherein the insulating body consists of a glass fiber reinforced plastic disc with through holes for conductors, the insulator with press fit in the passage and the conductors are press-fitted into the through holes of the insulator and the insulator and the conductors are glued on their peripheral surfaces in addition to the interference fit in their respective recordings ,

The Pressure differences between the dividing walls far exceed the mentioned, atmospheric pressure conditions normal, industrial applications.

These Connection-, Switch and distribution boxes - so they not completely shed inside - are subject - both in indoor and outdoor applications physical laws, such as the formation of internal moisture to water due to temperature and pressure changes, keyword dew point water formation. At price-sensitive Outdoor applications becomes the hollow body of the connection, Switching and distribution box with drainage through holes Mistake. In the field of installation technology these are often dependent on protection type Drilling through filters, labyrinths, diaphragms, baffles or valves added, from outside Reject penetrating water. In applications of traffic engineering Helps the expensive, non-environmentally friendly housing interior grouting under Of air. An inexpensive, alternative solution represents the creation of semi-permeable housing openings the housing openings supplemented by filters, the opening in one direction only Having micropores, filters or diaphragm valves.

in the The following is the prior art relating to the filter or Appreciated membrane technology.

According to German disclosure DE 103 00 063 International Application WO 2004 062 318 proposes a membrane for an acoustic transducer, comprising a polymer layer having a predetermined weight per unit area, wherein the polymer layer is coated with a metal, so that the membrane of a desired surface charge density to an EI value <22 mg / μC is electrostatically chargeable, in particular <20 mg / μC, wherein the EI value is defined as the quotient of basis weight of the polymer layer to surface charge density.

The protected Arrangement does not concern cable bushings or the like.

In the German patent DE 690 05 198 / European font EP 401 486 is a selectively permeable membrane having permeability to water vapor, the property of which can be used for the separation of water vapor from the vapor of aqueous acids and for the dehumidification and separation of industrially useful gases and for the protection of instruments and sensors and has stable performance. The selectively transmissive membrane comprises a thin film of polyacrylonitrile resin containing about 0.5% to 10% sulfonic acid groups coated on a porous tetrafluoroethylene (PTFE) or polyolefin film.

The If appropriate, the invention is suitable as a membrane material over which Application reference Cable feedthrough is not specified.

The German patent DE 41 17 281 discloses a hydrophilized microporous membrane of polytetrafluoroethylene (PTFE) and a hydrophilizing agent for solid-liquid, liquid-liquid, liquid-gaseous and gas-gaseous separation processes, such as for microfiltration, reverse osmosis, dialysis, electrodialysis and gas separation, as well as a process for the preparation of the membranes. The PTFE membrane is not subject to any restrictions.

The If appropriate, the invention is suitable as a membrane material over which Application reference Cable feedthrough is not specified.

According to the main patent 'cable bushing with diaphragm valve', DE 10 2005 035 210 A1 Such a breathable cable / hose conduit is presented for the mechanical and one-sided hydroscopically impermeable passage of a shielded or unshielded electrical cable with or without strain relief with or without bending protection for this cable. 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.

At the Main patent is believed to be when using cable glands with diaphragm valve with fixed cable diameter, the dimension for the mounting hole because of the air duct increased by one class. As with standard installation housings already Breakout aids and pre-cuts for cable penetrations are provided according to the number and size of the intended use of the housing could be appropriate the use of such cable penetrations adversely affect.

Of the The invention is therefore based on the object, a device according to the preamble of claim 1, a breathable cable / hose feedthrough to mechanically and unilaterally hydroscopically dense implementation of a shielded or unshielded electrical cable with or without Strain relief with or without bending protection for this cable through an opening in a housing wall circumventing the above disadvantage, so that the leadership of the Air duct of the cable / hose leadthrough is so pronounced that the known commercial Relation of feasible cable diameter to measure for the mounting hole the cable entry preserved.

These Task is according to the invention with the help the characterizing features of claim 1 solved.

advantageous Embodiments of the invention will become apparent from the dependent claims.

The achieved with the invention advantages - in addition to the prevention of Formation of moisture precipitation within closed spaces - in particular in that commercial, on the installation market known parts are installed by the installer and no extra Precautions must be taken Such applications often rely on minimal physical and weight dimensions are designed.

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

1 Perspective view of the multi-piece cable entry

2 Partially disassembled cable grommet in perspective

3 Perspective view of the multi-piece cable gland, half lengthwise cut

4 Partially disassembled cable gland in perspective, half lengthwise cut.

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

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

How out 1 can be seen, there is the multi-piece, breathable cable / hose passage from top 1 , Middle part 2 and lower part 3 ,

In the variant A 'material metal' - eg brass - is the upper part 1 made of plastic; in variant B 'material plastic', upper 1 and middle part 2 also be in one piece.

The upper part consists of a hollow cylinder in a molded cable claw 12 opens, the prepared for the corresponding cable outer diameter cable sealing ring 13 and the cap seal causing the cable seal and strain relief by cable pinching 14 , The hollow cylinder forms the cable guide on the inside 15 and on the outside a wedge-shaped tapered press connection 18 to the middle part (variant A); in variant B, the Preßverbindung can be omitted. In the groove 19 can be an additional seal 191 - O-ring, or similar - be introduced.

Furthermore, this is between upper and lower terteil, in the middle section 2 , fixed semipermeable filter / diaphragm valve 21 shown in the form of a cylinder ring. In such filters / membranes is usually a plastic material made of polymer / polypropylene or expanded polytetrafluoroethylene, which has hydrophobic character by its symmetrical pore structure, has a wide chemical compatibility, applicable for temperatures between -40 ° C ... + 125 ° C. and at a temperature of 23 ° C has a filter / membrane permeability of> 10 ml / [min × cm ² × bar].

The the filter / diaphragm valve 21 holding parts - supporting and sealing ring 22 - between middle and 2 and lower part 3 may also be so pronounced that the semipermeable filter / diaphragm valve is designed interchangeable.

Filter / diaphragm valve 21 and support and sealing ring 22 can also form a firmly joined assembly.

The shape of the filter / diaphragm valve 21 is with the shape of the ventilation duct to be sealed 25 . 32 in accordance.

Furthermore, there is the middle part 2 from the cable guide 23 , the holes of the ventilation duct external hex 24 as well as the inside circumferential ventilation duct 25 , Upwards, towards the upper part, the middle part closes with the threaded connection 26 for receiving the strain relief forming cap nut.

In addition, an embodiment of the lower part 3 the breathable cable / hose passage shown. This consists of a hollow cylindrical threaded connector 31 , the inside with the inner cylinder 34 concludes. The lower part closes to the middle part by a flange 36 from, whose obliquely fitting holes 32 Continue the air duct / ventilation path into the housing interior.

The dense metal connection between sub- 3 and middle part 2 can be done by pressing or compressing the projecting beyond the flange cylindrical edges of the middle part (variant A). Also, the tightness of the two parts can be produced by a screw connection. In the event that the cable / hose feedthrough is made of plastic, the lower and middle part can be glued or welded together (variant B).

The seal of the lower part 3 in the housing usually takes place through a threaded connector 31 inverted O-ring 35 and screw connection in thread or with locknut.

2 shows the partially opened cable / hose leadthrough in perspective. The assembly of the parts can be done differently, such as by gluing, ultrasonic welding, as injection-molded insert, etc. Furthermore, can also 3 and middle part 2 be integrated by appropriate pre-assembly and treatment.

Wireless cable / hose feedthroughs can be achieved through the unprepared, closed sealing ring 13 and the bolt-on cap nut 14 be sealed - and act as sealing / choke nipple and / or blind plug / screw plug - so that the wireless cable / hose passage also or additionally as a semi-permeable housing ventilation with diaphragm valve - such as a pressure compensation element (DAE) - can be used.

3 shows the perspective view of the multi-part cable / hose feedthrough, if it is half cut longitudinally in the middle. The spatial surface of the inner cylinder 34 , the outer sheath of the cable passed, detached from the holes of the ventilation duct 32 of the flange 36 of the lower part 3 opening into the semipermeable filter / membrane valve 21 with support and sealing ring 22 , the surrounding internal ventilation duct 25 as well as the bore holes of the hexagon 24 of the middle section 2 form the vent of the cable gland and determine its volume flow rate as a function of pressure and temperature.

4 shows the partially opened cable / hose feedthrough in perspective, if it is half cut longitudinally in the middle.

Cable / hose penetrations are usually after the metric thread of the attachment 31 traded specifying the possible cable diameter 15 . 23 and the wrench size of the hexagon 24 , Advantageous compared to the grommet of the main patent is the consideration of the cross-sectional area of the air duct in the presented breathable cable / hose feedthrough of new design, so that for a given cable diameter 15 . 23 no larger neck size 31 is to be set, which depends on the required volume / dimension of the ventilation duct.

A Another embodiment of the invention provides that it is in the thread of the threaded neck not necessarily metric Thread trade must - taken into account is Panzerrohrgewinde (Pg) - so that the inventive novelty is also used as a replacement / supplementary component.

A further form of expression the inventive novelty is given by the fact that the threaded neck of the lower part not screwed, but holding fast, through additional O-ring is sealingly connected to the wall of the housing.

When alternative strain relief of the invention is the use of an am Upper part laterally guided grub screw with seal / protection arranged between connection piece and cable sheath given; Threaded connector and cable claw become a nozzle shortened, Sealing ring and cap nut omitted.

One upper part shortened by the threaded connection also arises when the strain relief on the sealing ring and through a correspondingly shaped cable claw made with cable ties or clamp becomes; the cap nut is omitted.

According to one further characteristic the cable / hose leadthrough the strain relief is over the sealing ring and a correspondingly shaped cable claw and hat cap resting.

According to one Another embodiment of the invention, the ventilation duct also unbalanced pronounced and arranged be, accordingly also the semipermeable filter / diaphragm valve.

A further characteristic the invention provides that the ventilation duct the cable / hose leadthrough can be created multiple times and accordingly by multiple filtering is completed.

One Another application of multichannel ventilation is that the semipermeable filter / membranes different porosity / passage numbers exhibit and thus for different substances become effective.

A further advantageous embodiment of the invention results from that the breathable cable / hose lead-through in their assembly none Laying instructions are subject. Protection against the penetration of dirt particles or water is given; even with over-head mounting is through beveled Edges the drain of water possible.

A Another embodiment of the invention provides that the breathable Cable / hose guide as a stackable cable entry module in Schaltschrankbau Use finds.

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

1

top Cable / hose guide

12

cable claw

13

seal (not shown)

14

Hutmutter (not shown)

15

cable management

18

compression joint

19

ring groove

191

O-ring (not shown)

2

midsection Cable / hose guide

21

semipermeable Filter / diaphragm valve

22

Support and support seal

23

cable management

24

ventilation duct External hexagon

25

Ventilation duct, Inside

26

Threaded connector, above

3

lower part Cable / hose guide

31

Threaded connector, below

32

drilling ventilation duct

34

inner cylinder

35

O- / Flat sealing ring (not shown)

36

Flange, pierced

Claims (10)

Breathable cable / hose conduit for mechanically and unilaterally hydroscopically impermeable passage of a shielded or unshielded electrical cable with or without strain relief with or without bending protection for this cable through an opening in a housing wall according to claim 2 of the main patent, no. DE 10 2005 035 210 A1 , characterized in that an external hexagon part of the central part ( 2 ) and the ventilation duct ( 24 ) on the hexagon socket as bores, which run perpendicular to the direction of execution of the cable / hose passage, is formed, in extension of the holes of the ventilation duct ( 25 ) inside the middle part ( 2 ) runs cylindrical and perpendicular to the holes and there on the ventilation duct ( 32 ) of the lower part ( 3 ), whereby the ventilation duct ( 32 ) of the lower part ( 3 ) is formed as obliquely inwardly directed bores and a cable guide ( 23 ) at the middle part ( 2 ) in front of the exit area of the ventilation duct ( 32 ) ends, so that so that the leadership of the air duct ( 24 . 25 . 32 ) of the cable / hose leadthrough is so pronounced that the known commercial relation feasible cable diameter is maintained to measure for the mounting hole of the cable / hose passage on the housing wall. Breathable cable / hose leadthrough according to claim 1, characterized in that the multi-piece, breathable cable / hose lead-through from the upper part ( 1 ), the middle part ( 2 ) and the lower part ( 3 ), wherein - due to material or by appropriate pre-assembly - even several parts can be made in one piece. Breathable cable / hose conduit according to at least one of claims 1 and 2, characterized in that the upper part ( 1 ) consists of a hollow cylinder in a molded cable claw ( 12 ), a prepared for the corresponding cable outer diameter sealing ring ( 13 ) and a cap nut causing the cable seal and strain relief by cable squeezing ( 14 ), wherein the hollow cylinder inside the cable guide ( 15 ) and on the outside a hollow tapered press connection ( 18 ) to the middle part ( 2 ). Breathable cable / hose leadthrough according to at least one of claims 1 to 3, characterized in that between the densely joined middle ( 2 ) and lower part ( 3 ) a semi-permeable filter / membrane valve ( 21 ) in the form of a cylindrical ring in a cylindrical, stepped and to the lower part ( 3 ) opening of the middle part ( 2 ), which is the upper part ( 1 ) to the circumferential ventilation duct ( 25 ) and to the lower part ( 3 ) over the flange ( 36 ) of the same is sealed, and which in the other direction a threaded connector ( 26 ) for receiving the cap nut ( 14 ) contributes to the strain relief. Breathable cable / hose conduit according to at least one of claims 1 to 4, characterized in that a support and sealing ring ( 22 ) provided as part of the middle section ( 2 ) the filter / membrane valve ( 21 ) to the cylindrical inner ventilation duct ( 29 ) and that the support and sealing ring ( 22 ) and the filter / membrane valve ( 21 ) may be one or more pieces. Breathable cable / hose conduit according to at least one of claims 1 to 5, characterized in that the lower part ( 3 ) from a hollow cylindrical threaded neck ( 31 ), which is provided with an O-ring ( 35 ) sealed by means of screwing in thread or with counter / lock nut in the housing seals, and the inside with the inner cylinder ( 34 ) and one to the middle part ( 2 ) flared flange ( 36 ), whose inclined bores ( 32 ) the ventilation duct from the filter / membrane valve ( 21 ) with supporting and sealing ring ( 22 ) into the housing interior and with the cylindrical receptacle of the central part ( 2 ) is tightly joined. Breathable cable / hose conduit according to at least one of claims 1 to 6, characterized in that the filter / membrane valve ( 21 ) holding parts are formed so that a semi-permeable filter / membrane valve ( 21 ) is exchangeable / / exchangeable and / or also in connection with the support and sealing ring ( 22 ). Breathable cable / hose conduit according to at least one of claims 1 to 7, characterized in that the shape of the filter / membrane valve ( 21 ) is adapted to the shape of the ventilation duct to be sealed. Breathable cable / hose conduit according to at least one of claims 1 to 8, characterized in that the spatial surface of the inner cylinder ( 34 ), the outer jacket of the cable passed - detached from the holes ( 32 ) of the ventilation duct of the flange ( 36 ) of the lower part ( 3 ), opening in the semipermeable filter / membrane valve ( 21 ) with supporting and sealing ring ( 22 ) - the circumferential inner ventilation duct ( 25 ) as well as the bore holes ( 24 ) of the hexagon of the middle part ( 2 ) form the ventilation / venting of the cable / hose feedthrough and determine their volume flow rate as a function of pressure and temperature. Breathable cable / hose conduit according to at least one of claims 1 to 9, characterized in that the assembly of the parts ( 1 . 2 . 3 ) of the breathable cable / hose feedthrough can be independent of direction of rotation.