WO2011151265A2 - Passe-câble pour un blindage résistant à la pression - Google Patents

Passe-câble pour un blindage résistant à la pression Download PDF

Info

Publication number
WO2011151265A2
WO2011151265A2 PCT/EP2011/058749 EP2011058749W WO2011151265A2 WO 2011151265 A2 WO2011151265 A2 WO 2011151265A2 EP 2011058749 W EP2011058749 W EP 2011058749W WO 2011151265 A2 WO2011151265 A2 WO 2011151265A2
Authority
WO
WIPO (PCT)
Prior art keywords
opening
feedthrough
cable bushing
passage
bushing according
Prior art date
Application number
PCT/EP2011/058749
Other languages
German (de)
English (en)
Other versions
WO2011151265A3 (fr
Inventor
Bernd Limbacher
Werner Krippner
Original Assignee
R. Stahl Schaltgeräte GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by R. Stahl Schaltgeräte GmbH filed Critical R. Stahl Schaltgeräte GmbH
Publication of WO2011151265A2 publication Critical patent/WO2011151265A2/fr
Publication of WO2011151265A3 publication Critical patent/WO2011151265A3/fr

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
    • H02G3/22—Installations of cables or lines through walls, floors or ceilings, e.g. into buildings
    • 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
    • H02G15/00—Cable fittings
    • H02G15/013—Sealing means for cable inlets
    • 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
    • H02G3/08—Distribution boxes; Connection or junction boxes
    • H02G3/088—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings or inlets

Definitions

  • the present invention relates to flameproof enclosures used in explosive environments.
  • pressure-resistant capsules it is necessary to lead electrical leads or cables from the outside into the interior of the housing while maintaining the flameproof enclosure.
  • these almost hermetically sealed housing which often consist of metal, electrical consumers are operated. By heating them, the air pressure in the housing interior may rise, with an air pressure equalization with the environment being very slow because of the pressure-resistant encapsulation.
  • the pressure inside the pressure-resistant housing is lower than that of the surroundings. This is the case, for example, when the electrical consumers inside the flameproof enclosure are switched off and the air temperature in the interior of the housing drops rapidly, which can occur, for example, when the housing comes into contact with rain or splash water and is thus additionally cooled becomes.
  • pressure equalization openings are already introduced into the flameproof enclosures.
  • a flameproof enclosure is known, for example, from DE 10 2004 006 988 A1. known.
  • a spark gap with two main electrodes is described in a flameproof enclosure.
  • pressure equalization constructively existing channels small cross-section or to use porous gas-permeable housing materials such as porous polymers.
  • existing housing opening for pressure equalization can not be readily used because they usually have a high degree of equipment protection (> IP66). In that regard, there is the need to provide separate pressure equalization openings and to design this additional ignition breakdown.
  • the present invention provides a workaround for this problem. It is inventively provided to integrate the pressure compensation device, in particular in the form of a pressure compensation opening, in a line bushing for a flameproof enclosure. Because of the provided inside the flameproof enclosure electrical components, the ignition penetration proof passage of electrical cables or cables is required anyway. The existing for the cable bushing in the wall of the flameproof enclosure wall opening can therefore be used simultaneously by the pressure compensation device.
  • the cable feedthrough has a passage body with a passage opening. The through hole completely penetrates the passage body from one outer end to an opposite inner end. The passage opening is used to pass one or more electrical lines from the outside into the interior of the flameproof enclosure when the line feedthrough is inserted in the use position in the wall opening of the flameproof enclosure.
  • a pressure compensation opening is provided in the lead-through body.
  • a pressure compensation device for the flameproof enclosure is created.
  • the available space is optimally utilized and the assembly time in the production of flameproof enclosures reduced.
  • a single wall opening, in which the cable bushing is in particular releasably secured is sufficient.
  • An additional opening of the wall of the flameproof enclosure for a pressure compensation device is not necessary.
  • the pressure compensation device has a pressure equalization opening separated from the passage opening by a partition wall.
  • the pressure compensation opening is preferably formed within a channel.
  • the channel can be formed as a bore in the feedthrough body or by inserting a tube in the through hole.
  • a rod is preferably used there, so that a gap is formed between the channel wall and the rod, which serves as a pressure equalization opening.
  • Such Druckaus GmbHsöff ung can be produced inexpensively and easily.
  • a sufficient length of the pressure equalization opening can be achieved, so that any ignition ken or flames within the flameproof enclosure do not enter the potentially explosive environment of the enclosure.
  • a fastening means is provided on the feedthrough body, which serves for the releasable attachment of the cable bushing to the flameproof enclosure.
  • the feedthrough body has a cylindrical portion. On the outside it is provided with a defined diameter or with a thread. With the designed as a counterpart wall opening a flameproof connection is formed.
  • the length of the pressure equalization opening corresponds at least to the length of the feedthrough body from its outer end to its inner end.
  • the passage opening preferably has a cylindrical shape and is therefore very easy to manufacture.
  • the longitudinal axis of the cylindrical passage opening may be offset relative to the longitudinal axis of the cylindrical portion of the passage body.
  • the pressure compensation opening is arranged at a distance from the passage opening in the feedthrough body.
  • the passage opening between the at least one duct and the housing part is preferably sealed with a sealing compound.
  • This sealant can also be used in an embodiment in the passage opening pipe Seal against the lead-through body, wherein the passage opening is provided in the channel of the tube.
  • casting resin can be used as sealing compound, which is poured into the passage opening and then cured.
  • a positioning means is arranged in the pressure equalization opening in one embodiment.
  • the positioning means are used to position the at least one electrical lead and / or tube relative to each other and relative to the feedthrough body.
  • a sealing plate can be used, which rests close to the pressure equalization opening on the one hand and on the electrical line or the pipe on the other. At the same time, the sealing plate serves to seal off the passage opening before the filling of the sealing compound, in particular of the casting resin.
  • a water-impermeable membrane may be provided at the outer end of the feedthrough body.
  • the water-impermeable membrane can cover the Druckaus GmbHsöff waterproof.
  • the outer end of the cable feedthrough can also be arranged protected elsewhere on the flameproof enclosure.
  • an outer housing which completely encloses the cable bushing.
  • the outer end of the cable feedthrough is thus arranged in the outer housing.
  • outer housing for example, a terminal housing of the type Ex-e can be used.
  • a so-called Ex-e-breathing nozzle for pressure equalization between the interior of the outer housing and the environment may be arranged.
  • the cable feedthrough can be made very easily.
  • the at least one electrical line is guided through the passage opening into the interior of the flameproof enclosure.
  • the pipe optionally used to form the pressure equalization opening is also inserted into the passage opening.
  • the passage opening is sealed by filling a sealant, wherein resin can be poured and cured.
  • a sealant wherein resin can be poured and cured.
  • the pressure compensation opening is formed in a channel
  • a cylindrical rod is finally inserted into the channel and secured against slipping out of the channel. Between the rod and the channel wall then the pressure compensation opening is formed in the form of a gap.
  • the bushing body is inserted into a wall opening of the flameproof enclosure and preferably screwed.
  • FIG. 1 shows a schematic cross-sectional view of a first embodiment of a cable feedthrough
  • FIG. 2 shows a schematic cross-sectional view of a second embodiment of the cable feedthrough
  • Figure 3 is a perspective view of the first Embodiment of the cable bushing according to FIG. 1,
  • FIG. 4 shows a perspective sectional view of the line bushing from FIG. 3,
  • FIG. 5 is a perspective view of the second embodiment of the cable bushing according to Figure 2,
  • Figure 7 is a flameproof enclosure with a cable feedthrough and an outer housing.
  • FIGS. 1, 3 and 4 show a first exemplary embodiment of a cable bushing 10 for a flameproof enclosure 11.
  • the cable feedthrough 10 has a feedthrough body 12 with a cylindrical portion 13.
  • the cylindrical portion 13 has on its outer periphery an external thread 14, which serves as a fastening means for releasably securing the cable bushing 10 to a wall opening 15 of a wall 16 of the flameproof enclosure 11.
  • an internal thread 17 is provided around the wall opening 15.
  • the external thread 14 extends from the free end of the cylindrical portion 13 to a flange 18 of the feedthrough body 12, which adjoins the cylindrical portion 13.
  • the free end of the cylindrical portion 13 forms the inner end 19 of the grommet body 12.
  • the inner end opposite outer end 20 of the grommet body is provided on the flange 18.
  • bushing body 12 of the flange 18 is located on the outside of the wall 16 of the flameproof enclosure 11, so that the inner end 19 is within the flameproof enclosure 11.
  • the flange 18 is used, for example, at the same time for mounting the feedthrough body 12 to the flameproof enclosure 11. For this purpose, it is designed as a hexagon head, whereby other forms for positive coupling with a tool are possible.
  • the feedthrough body 12 consists of. a single part and is made without seams or joints of a single material in one piece. The execution is to be regarded as an example.
  • the lead-through body 12 can also be screwed in from the inside.
  • the flange 18 then abuts against the inside of the wall 16 of the flameproof enclosure 11.
  • the bushing body becomes from its outer end 20 completely penetrated to its inner end 19 of an exemplary cylindrical through hole 23.
  • the passage opening 23 serves to pass through one or more electrical lines 24, which may each have one or more wires.
  • the passage opening 23 is provided concentrically to the axial portion 13 in the first embodiment of the cable feedthrough 10.
  • the wall thickness of the axial portion 13 around the passage opening 23 around is therefore everywhere the same size in the circumferential direction.
  • the line bushing 10 also has a pressure compensation device 25 with a pressure compensation opening 26.
  • the pressure compensation opening 26 serves in the position of use of the line bushing 10 to connect the interior of the flameproof enclosure 11 with the environment of the flameproof enclosure 11 to produce a pressure equalization. This is achieved, for example, by the pressure equalization opening 26, the inner mouth 27 is in use in the housing interior of the flameproof enclosure 11 and the outer orifice 28 outside the housing inner region of the flameproof enclosure 11 is arranged. To achieve this, the inner orifice 27 is arranged in the region of the inner end 19 and the outer orifice 28 in the region of the outer end 20 of the bushing body 12.
  • the pressure compensation opening 26 passes completely through the feedthrough body 12, wherein the length of the pressure compensation opening 26 corresponds at least to the length of the pressure compensation body 12. The length of the pressure balance body 12 is measured from the inner end 19 to the outer end 20.
  • the Druckausticiansöff opening 26 is formed in the embodiments described herein in a channel 30.
  • the channel 30 has a cylindrical shape and extends
  • the channel 30 is provided in the first embodiment according to Figures 1, 3 and 4 in a tube 31 which is inserted through the through-hole 23 through and fully enforced ⁇ this is parallel to the axial direction of the cylindrical portion 13 of the implementing body.
  • the tube ends are located outside the passage opening 23.
  • a cylindrical rod 32 is used, whose outer diameter is slightly smaller than the inner diameter of the channel 30. In this way, a gap between the lateral surface of the rod and the channel wall. This gap forms the pressure equalization opening 26.
  • the pressure compensation opening 26 is formed by a hollow cylindrical gap.
  • a positioning means 35 is arranged, which serves for positioning of the tube 32 and the at least one electrical line 24 in the through hole 23.
  • the positioning means 35 is formed, for example, by a sealing washer 36 which rests against the passage opening 23 over its entire circumference. Through holes 34 in the gasket 36, the tube 31 and the at least one electrical line 24 is inserted therethrough.
  • the sealing disc 36 is located closer to the inner end 19 within the passage opening 23 than to the outer end 20 of the passage body 12. It also serves as a closure of the passage opening 23 for filling a sealant 37, as described in more detail below.
  • the bushing body 12 is in the area of his
  • the ribs 38 are arranged on the inside of the axial section 13 and in the axial direction according to the example arranged regularly spaced.
  • the resulting annular recess 39 between the ribs is used to support the sealing washer 36 on the feedthrough body 12.
  • the thickness of the sealing washer 36 corresponds to the distance between two adjacent ribs 38 and thus the measured axial length of the recess 39.
  • the sealing disc 36 may be made of elastic material and therefore in one of the recesses 39 of the rigid bushing body 12 are used.
  • the outside of the tube 31 is designed ribbed. For this purpose, a plurality of axially spaced annular radial projections 40 are present.
  • the production of the first embodiment of the cable feedthrough 10 takes place as follows:
  • the seal plate 36 is inserted into one of the recesses 39 within the passage opening 23.
  • the tube 31 and the necessary number of electrical lines 24 are passed.
  • the passage opening in a region between the sealing disc 36 and the outer end 20 of the feedthrough body 12 is filled with the sealant 38.
  • the filling height at right angles to the sealing disc 36 depends on the compressive strength requirements.
  • a sealant 37 is used, for example, a casting resin, which is filled into the through hole 23 and then cured. Curing may take place under conventional environmental conditions or alternatively irradiation of the resin, for example, be carried out with UV light.
  • the cylindrical rod 32 is inserted into the channel 30 of the tube 31 and secured against slipping out.
  • grooved pins 41 are inserted into securing holes of the rod 32 for this purpose.
  • the securing holes pass through each ⁇ wells a tube 31 protruding from the tip of the rod 32 transverse to its longitudinal axis. In this way, an explosion-proof line bushing 10 is achieved, which has a pressure compensation device 25 in the form of a pressure compensation opening 26.
  • the tube 31 is longer than the passage body 12.
  • the pressure compensation opening 26 is therefore longer than the passage opening 23.
  • the required length of the pipe or the pressure compensation opening 26 depends on the actual explosion protection conditions.
  • the ignition breakdown safety can be increased by making the pipe 31 or the pressure compensation opening 26 longer, so that a spark gap or a pilot flame within the flameproof enclosure 11 is provided with a sufficiently long cooling zone within the pressure compensation opening 26.
  • FIGS. 2, 5 and 6 illustrate a second embodiment of the cable feedthrough 10.
  • FIGS. 2, 5 and 6 illustrate a second embodiment of the cable feedthrough 10.
  • the channel 30 is arranged directly in the feedthrough body 12 in the second embodiment.
  • the channel 30 is parallel to the longitudinal axis of the cylindrical portion 13 with Distance to the passage opening 23.
  • the wall of the tube 31 serves as a partition 44.
  • the partition 44 is of a wall portion the passage opening 23 is formed.
  • the cylindrical manufactorsöff tion 23 is provided eccentrically to the cylindrical portion 13 in the lead-through body 12 in the second embodiment.
  • the wall thickness of the cylindrical portion 13 changes in the circumferential direction around the through hole 23 around. In the region of its maximum wall thickness, this provides sufficient space for the introduction of the channel 30.
  • the passage opening 23 and the channel 30 are thus parallel to each other extending cylindrical through holes, which are provided eccentrically to the cylindrical portion in the feedthrough body 12.
  • one component is less present since the tube 31 can be dispensed with.
  • only the electrical lines are passed.
  • the positioning means 35 formed by the sealing washer 36 therefore only have to position the electrical leads 24. Otherwise, the design and manufacture correspond to the first embodiment as described above.
  • a suppression can form in relation to the environment in certain operating situations.
  • the pressure compensation opening 26 may be closed in the region of the outer end 20 of the feedthrough body 12 by a water-repellent membrane 45, as shown only schematically dash-dotted lines in Figures 1 and 2.
  • a water-repellent membrane 45 as shown only schematically dash-dotted lines in Figures 1 and 2.
  • other protective measures can be taken to prevent the ingress of moisture and water into the housing interior of the flameproof enclosure 11.
  • an outer housing 46 can be flanged to the flameproof enclosure 11, as illustrated in FIG. The outer housing 46 encloses the line bushing 10 completely.
  • the outer end 20 of the conduit bushing 10 and the bushing body 12 are arranged inside the outer housing 46 and thus protected.
  • the pressure equalization between the housing interior of the flameproof enclosure 11 and the environment takes place via the pressure compensation device 25 of the conduit bushing 10 and via a breathing nozzle 47 in the outer housing 46.
  • a breathing nozzle 47 here is a so-called Ex-e-breathing nozzle.
  • the breathing nozzle 47 is disposed at a location inaccessible to water, for example, a bottom of the outer housing 46.
  • a so-called Ex-e-connection housing can be used as outer housing. The penetration of water into the interior of the flameproof enclosure 11 is effectively avoided in this way.
  • the invention relates to a line feedthrough 10 for a flameproof enclosure 11.
  • the line feedthrough 10 has a feedthrough body 12 for fastening in a wall opening 15 of the flameproof enclosure 11.
  • a passage opening 23 for the passage of at least one electrical line 24 is provided in the feedthrough body 12.
  • the line bushing 19 also has a pressure compensation device 25, which is preferably formed by a 26 Zündausschlagtechniktechnikeren Druckausreteff.
  • the pressure compensation device 25 is an integral part of the cable feedthrough 10. In this way, via the wall opening 15 of the flameproof enclosure 11 not only a line feedthrough for electrical lines 24, but also achieved a pressure equalization between the pressure within the enclosure 11 and the environment of the enclosure 11 at the same time. Additional, separate pressure compensation means of the flameproof enclosure 11 can therefore be omitted.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Installation Of Indoor Wiring (AREA)
  • Cable Accessories (AREA)

Abstract

L'invention concerne un passe-câble (10) pour un blindage (11) résistant à la pression. Le passe-câble (10) comporte un corps de traversée (12) pour la fixation dans une ouverture de paroi (15) du blindage (11) résistant à la pression. Dans le corps de traversée (12) est prévue une ouverture (23) permettant le passage d'au moins un câble électrique (24). Le passe-câble (10) comporte, en outre, un compensateur de pression (25) formé, de préférence, par une ouverture de compensation de pression (26) résistante au claquage d'amorçage. Le compensateur de pression (25) est une partie intégrante du passe-câble (10). Ainsi, par l'intermédiaire de l'ouverture de paroi (15) du blindage (11) résistant à la pression, on obtient non seulement un passe-câble pour câbles électriques (24), mais en même temps aussi une compensation de pression entre la pression à l'intérieur du blindage (11) et à l'extérieur du blindage (11). Il est donc possible de supprimer des moyens de compensation de pression séparés supplémentaires du blindage (11) résistant à la pression.
PCT/EP2011/058749 2010-05-31 2011-05-27 Passe-câble pour un blindage résistant à la pression WO2011151265A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010017153.0 2010-05-31
DE102010017153.0A DE102010017153B4 (de) 2010-05-31 2010-05-31 Leitungsdurchführung für eine druckfeste Kapselung, druckfeste Kapselung und Verfahren zum Herstellen einer Leitungsdurchführung

Publications (2)

Publication Number Publication Date
WO2011151265A2 true WO2011151265A2 (fr) 2011-12-08
WO2011151265A3 WO2011151265A3 (fr) 2013-04-18

Family

ID=44626619

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/058749 WO2011151265A2 (fr) 2010-05-31 2011-05-27 Passe-câble pour un blindage résistant à la pression

Country Status (2)

Country Link
DE (1) DE102010017153B4 (fr)
WO (1) WO2011151265A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108054714A (zh) * 2018-01-12 2018-05-18 浙江大元泵业股份有限公司 一种新型电缆线密封结构
US11374390B2 (en) * 2015-07-28 2022-06-28 R. Stahl Schaltgeräte GmbH Explosion-proof assembly and method for producing same
US20230304635A1 (en) * 2022-03-24 2023-09-28 EnerVenue, Inc Feedthrough for a Pressure Vessel

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012105113A1 (de) 2012-06-13 2013-12-19 R. Stahl Schaltgeräte GmbH Durchführungsvorrichtung für ein explosionsgeschütztes Gehäuse
DE102014225511B4 (de) * 2014-12-11 2022-04-28 Vitesco Technologies Germany Gmbh Gehäuse für ein KFZ-Steuergerät, ein Verfahren zu dessen Herstellung und zur Prüfung der Dichtigkeit des Gehäuses
DE102016112076B3 (de) 2016-07-01 2017-12-14 R. Stahl Schaltgeräte GmbH Prüfanordnung für ein explosionsgeschütztes Gehäuse, explosionsgeschütztes Gehäuse mit einer Prüfanordnung sowie Verfahren zur Herstellung und Prüfung eines explosionsgeschützten Gehäuses
DE102018116397A1 (de) * 2018-07-06 2020-01-09 R. Stahl Schaltgeräte GmbH Explosionsgeschütztes Gehäuse mit Druckentlastung

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DE102004006988A1 (de) 2003-11-28 2005-06-30 Dehn + Söhne Gmbh + Co. Kg Überspannungsschutzeinrichtung auf Funkenstreckenbasis, umfassend mindestens zwei in einem druckdichten Gehäuse befindliche Hauptelektroden
DE202008001972U1 (de) 2008-02-13 2008-05-29 Fhf Funke + Huster Fernsig Gmbh Gehäuse für eine elektrische Schaltungsanlage in explosionsgeschützter Bauart

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11374390B2 (en) * 2015-07-28 2022-06-28 R. Stahl Schaltgeräte GmbH Explosion-proof assembly and method for producing same
CN108054714A (zh) * 2018-01-12 2018-05-18 浙江大元泵业股份有限公司 一种新型电缆线密封结构
CN108054714B (zh) * 2018-01-12 2024-03-26 浙江大元泵业股份有限公司 一种新型电缆线密封结构
US20230304635A1 (en) * 2022-03-24 2023-09-28 EnerVenue, Inc Feedthrough for a Pressure Vessel

Also Published As

Publication number Publication date
DE102010017153B4 (de) 2017-03-30
WO2011151265A3 (fr) 2013-04-18
DE102010017153A1 (de) 2011-12-01

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