EP0187636B2 - Dispositif de connexion pour un câble chauffant - Google Patents

Dispositif de connexion pour un câble chauffant Download PDF

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Publication number
EP0187636B2
EP0187636B2 EP86100003A EP86100003A EP0187636B2 EP 0187636 B2 EP0187636 B2 EP 0187636B2 EP 86100003 A EP86100003 A EP 86100003A EP 86100003 A EP86100003 A EP 86100003A EP 0187636 B2 EP0187636 B2 EP 0187636B2
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EP
European Patent Office
Prior art keywords
housing
heating cable
cable
pressure
resistant
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP86100003A
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German (de)
English (en)
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EP0187636A1 (fr
EP0187636B1 (fr
Inventor
Reinhold Barlian
Martin Fischle
Erich Göttmann
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Individual
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Individual
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Application filed by Individual filed Critical Individual
Priority to AT86100003T priority Critical patent/ATE42885T1/de
Publication of EP0187636A1 publication Critical patent/EP0187636A1/fr
Publication of EP0187636B1 publication Critical patent/EP0187636B1/fr
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Publication of EP0187636B2 publication Critical patent/EP0187636B2/fr
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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/02—Details
    • H05B3/06—Heater elements structurally combined with coupling elements or holders
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/54—Heating elements having the shape of rods or tubes flexible
    • H05B3/56—Heating cables

Definitions

  • the invention relates to an electrical heating cable connection device with the features of the preamble of claim 1.
  • the connecting end of the heating cable is cast in casting resin after being clamped in the housing.
  • the entire interior of the housing is filled with casting resin so that practically no cavity remains; see. DE-A-2011392.
  • Such a heating cable connection is complex and problems can arise when pouring the housing with the casting resin, especially in unfavorable weather conditions, that the casting resin can foam up if the moisture content is too high and insulation is not properly achieved.
  • Another disadvantage is that such a heating cable connection can no longer be dismantled after casting, so that no reassembly can be carried out, for example, for inspections or repair work.
  • the heating tape connections embedded in cast resin had to be approved separately in different countries due to the different national Ex regulations.
  • the object of the invention is to develop a device with the features of the preamble of claim 1 to the effect that a multinationally approved heating cable connection is achieved, which can be installed on the construction site without resin using simple means, with differently designed heating cables can be connected, and which Is accessible for inspection and further use without destruction.
  • This object is achieved by the characterizing features of claim 1.
  • Non-destructive heating cable connection devices are known per se from FR-A-1244373, but they are not explosion-proof.
  • the housing 1 shown in the drawing is essentially designed as a tube.
  • the tube wall of the housing 1 has a thickened wall part 2 (FIG. 2) on one longitudinal side, so that a projecting longitudinal web is formed which has a flat surface 3 on the outside.
  • an internal thread 4 is formed, into which a locking screw designed as a sleeve screw 5 can be screwed.
  • the sleeve screw 5 has a head 7 provided with wrench flats 6 and a recess 8 designed as a circumferential groove.
  • a locking screw 9 is provided at the end region of the housing 1, which radially in the recess 8 of the sleeve screw 5 engages.
  • the locking screw 9 is mounted in a stepped transverse hole 10, which is located in the area of the thickened wall part 2.
  • the locking screw 9 can be designed so that it can only be loosened with a special tool. In addition, it is favorable to secure the locking screw 9 in the released position on the housing 1.
  • a threaded hole 11 is also provided, into which an earth connection screw can be screwed.
  • the threaded hole 11 is also located in the thickened wall part 2 in the area between two notches 12.
  • the housing 1 can expediently have a cable entry 13 passing through the sleeve screw 5 at each of the two opposite end regions, so that a corresponding cable connection can take place from both sides.
  • the housing 1 shown in Fig. 3 has only a single cable entry 13 and is otherwise designed as a closed heating cable termination.
  • the housing 1 shown in FIGS. 4 and 5 are designed essentially like the housing 1 of FIGS. 1 and 2, but the sleeve screws 5 used here have a strain relief 14 for fixing the cable by means of a corresponding clamp fastening being achieved by means of screws.
  • the housing 1 is assigned elastomer seals 15 which can be inserted into the area of the internal thread 4 of the housing 1.
  • the elastomer seal 15 consists of a high-temperature resistant material, such as silicone or the like, and has a permanent temperature resistance, which is preferably substantially above 150 ° C.
  • the elastomer seal 15 is located between a stop washer 16 which is supported in the housing 1 and a pressure washer 17 which bears on the sleeve screw 5.
  • Fig. 7 clearly shows that in the metallic housing 1, an insulating jacket 18 is provided, which is designed as a thin-walled tubular sleeve in this embodiment.
  • the insulating jacket 18 consists of a high-temperature-resistant insulating material, which can be a thermosetting plastic, for example, and comprises an insulating body 19 which is closely enclosed by the insulating jacket 18.
  • the insulating body 19 is thus located in the interior 20 of the insulating sheath 18.
  • This interior 20 is not filled with a casting resin or the like, as is usually the case, but is completely free from casting, so that the insulating body 19 is detachably mounted. There is therefore a free volume 21 on each side of the insulating body 19, which is also delimited by the end region of the insulating sheath 18 projecting beyond the insulating body 19.
  • connection terminals 24 for electrical cable conductors and a protective conductor connection 25 to which a protective conductor 26 can be connected are connected to which a protective conductor 26 can be connected.
  • a stair-step-shaped air and creepage distance 27 is formed on the insulating body 19 on one end face 22 between the area of the connecting terminals 24 and the protective conductor connection 25.
  • the one end of the tubular insulating jacket 18 is supported on a collar 28 of the housing 1.
  • the stop disk 16 lies on the other side of the collar 28.
  • the insulating sheath 18 is supported by the stop disc 16, which is designed here in steps. 7 also shows that the insulating sheath 18 has an opening 29 in its peripheral wall, in which an electrically conductive spring clip 30 is located.
  • the spring clip 30 is arranged on the protective conductor connection 25 and is in contact with the inner surface 31 of the metallic housing 1, so that a perfect connection is established.
  • the housing 1 is so small that the total free volume 21 is extremely small and is preferably less than ten cubic centimeters.
  • the free volume 21 is also less than a third of the total volume of the interior 20 in the housing 1.
  • This housing 1 is designed according to the invention as a pressure-resistant encapsulation for perfect explosion protection even at high operating temperatures. An explosion of an explosive mixture which may occur in the interior 20 is thus reliably resisted even at elevated heating temperatures, so that a transfer of the explosion from the interior 20 to the atmosphere surrounding the housing 1 is prevented with certainty.
  • a heating cable 32 is inserted through the upper cable entry 13 into the housing 1, the end part 33 of which is passed through the sleeve screw 5 and passes through the elastomer seal 15 as well as the pressure plate 17 and stop plate 18.
  • the elastomer seal 15 is firmly pressed against the end part 33 of the heating cable 32.
  • the temperature-resistant elastomer seal 15 is releasably fixed in the opening 35 of the housing 1 by means of the clamped sleeve screw 5, with the formation of an ignition-proof gap 34.
  • the thickness of the elastomer seal 15 and thus the length of the gap 34 which is resistant to ignition breakdown depends on the size of the free volume 21 executed in the housing 1, so that in any case a perfect explosion-proof introduction of the heating cable 32, which heats up to about 115 ° C. and more, is ensured.
  • a connection cable 36 is provided here, the conductors 37 are also releasably attached to the terminals 24 and the protective conductor connection 25 of the insulating body 19.
  • the connecting cable 36 like the heating cable 32, is inserted into the housing 1 in a manner that prevents ignition. It is within the scope of the invention to provide a second heating cable 32 instead of the connecting cable 36 on the lower cable entry 13.
  • the housing 1 of FIGS. 8 to 14 consists of a temperature-resistant insulating material, preferably of a thermosetting plastic, so that no protective conductor needs to be connected externally.
  • the housing 1 is also designed as a pressure-resistant encapsulation in such a way that reliable explosion protection is guaranteed in any case even at high operating temperatures of the heating cable 32.
  • the insulating jacket 18 in this case is formed directly by the wall of the housing 1 itself.
  • the inner surface 31 of the housing 1 thus closely encloses the insulating body 19.
  • the insulating sheath 18 is therefore a component of the pressure-resistant plastic housing 1 that is integrated in one piece from the same material.
  • FIG. 9 shows that the pressure-resistant housing 1 can also be arranged directly on a connection housing 38, for example.
  • the sleeve screw 5 of the one cable entry 13 has a threaded tube 39 which passes through the wall of the connection housing 38.
  • the threaded tube 39 is fixed with a threaded nut 41, so that here, too, an ignition-arrest-proof arrangement is made.
  • the connection cable 36 projects into the connection housing 38.
  • the anti-rotation bracket 42 which is again shown separately in FIGS. 16 and 16a, lies with a flat surface 43 on the flat surface 3 of the wall part 2.
  • a right-angled bracket end 44 is located close to one of the wrench flats 6 of the head 7.
  • the anti-rotation bracket 42 is expediently fixed to the housing 1 with the locking screw 9, the locking screw 9 advantageously being embedded in an enlarged stepped bore of the anti-rotation bracket 2.
  • the anti-rotation bracket 42 has a locking pin 45 for a perfect rotation-proof locking, which engages in a bore 46 of the wall part 2. 17 that the housing 1 has a second flat surface 3 ', which is also arranged on the thickened wall part 2 and which is oriented at an angle to it, directly next to the one flat surface 3.
  • the second plane surface 3 ' also has a transverse hole 10 for the locking screw 9 and a bore 46 for the locking pin 45, so that a second parallel anti-rotation bracket 42 can be attached.
  • the sleeve screw 5 shown separately in FIGS. 15, 15a and 15b also has a strain relief 14, which consists of a base bar 47 and two clamping bars 48, 48 ', which are braced against one another by means of screws 49, the heating cable 32 between the clamping bars 48, 48 'is held.
  • FIG. 7a The embodiment shown in FIG. 7a is essentially the same as that of FIG. 7. One difference is that in FIG. 7 a, a single-core heating cable 32 is enclosed in the heating cable entry 13. The only heating cable conductor of this single-core heating cable is attached to the connection terminal 24.
  • two single-core heating cables 32 are fastened together in the heating cable entry 13.
  • the two heating cables of the single-core heating cable 32 are connected to one or two terminals 24 of the insulating body 19.
  • the insulating body 19 in the pressure-resistant housing 1 consists of an upper plug part 58 and a lower plug part 58 ', which are plugged together.
  • the two plug parts 58, 58 ' can be plugged together during assembly outside the housing 1 or also in the housing 1.
  • This two-part connector design of the insulating body 19, in particular, makes it considerably easier to connect the heating cable 32 or the connecting cable 36.
  • the two facing ends 59 of the connector parts 58, 58 ' are designed in a stepped manner so that they engage in one another, which provides positive guidance, anti-rotation protection and a longer insulating distance in the coupling area.
  • the recess 8 in the upper and lower sleeve screw 5 is designed as an axial groove for the engagement of the locking screw.
  • two opposing axial grooves are provided on the circumference of the sleeve screw 5. Starting from the head 7, the axial grooves can extend over the entire length of the sleeve or, as shown, can be made somewhat shorter. With the help of the axial grooves 8, any tolerances (cable circumference or diameter, elastomer seal 15) in the area of the heating cable entry 13 can be perfectly compensated, since a finely graduated securing of the sleeve screw 5 can be achieved over a larger adjustment range in the axial direction.
  • FIGS. 13a, 13b and 13c are designed approximately like the examples of FIGS. 7a, 7b and 7c, except that here a pressure-resistant plastic housing is provided instead of the pressure-resistant metallic housing.
  • 13a a single-core heating cable 32 is connected.
  • a two-core connecting cable 36 is provided on the opposite side.
  • two single-core heating cables 32 are fixed together in the upper heating cable entry 13 and connected to the insulating body 19.
  • the insulating body 19 has two plug parts 58, 58 'which are plugged together and whose mutually facing end faces 59 are of stepped design and engage with one another.
  • the passage in the elastomer seal 15 of the heating cable entry 13 is preferably essentially formed as a narrow slot, so that a tight seal is ensured.
  • the pressure-resistant housing 1 is fastened to the product tube 50 with a clamp band 51 and is thereby located within an insulation 52 which surrounds the product tube 50.
  • the connecting cable 36 which is inserted into the housing 1 on the other side relative to the heating cable 32, is guided outwards from the insulation 52 in a bushing 53.
  • the bushing 53 is screwed to a bracket 54, which is fixed to the product tube 50 with a collar 55.
  • the bushing 53 is sealed on the outside of an outer shell 56 of the insulation 52 with an elastic seal 57 on its circumference.
  • FIG. 19 shows an arrangement in which the pressure-resistant housing 1 is provided essentially outside the insulation 52.
  • the housing 1 is also attached to the product tube 50 with a bracket 54.
  • the lower cable entry 13 passes through the outer casing 56 and projects into the insulation 52, the housing on the outer circumference being sealed to the outer casing 56 with the elastic seal 57.
  • the heating cable 32 likewise embodied here as a flat heating tape, lies directly against the product tube 50 for good heat transfer.
  • a major advantage of the heating tape connection device according to the invention is that no separate national approvals have to be obtained in the different countries, but that with this flameproof encapsulated heating tape connection an explosion protection permit that is effective in many countries is ensured.
  • the explosion-proof heating tape connection according to the invention is easily accessible at any time if necessary, for example for an inspection or the like.
  • heating cables 32 can be connected, which are designed, for example, as self-regulating parallel heating tapes, as parallel resistance heating tapes or as single-core plastic heating cables. It is also possible to use differently designed insulation materials, such as silicone, Teflon, polyolefins or the like, which is not possible with the known heating tape terminations to be filled with casting resin, because a sealing connection between a casting resin system and different cable insulation cannot be carried out uniformly .
  • a heating cable 32 which has no protective braid on the outside.
  • the use of such a braid-free heating cable 32 is particularly advantageous in the device according to the invention if, for example, the heating cable 32 is mechanically protected in a pipe or the like, or if a protective low voltage (less than 42 volts) is used.
  • a single-core heating cable 32 can also advantageously be laid as a loop such that the two end parts of the heating cable 32 can be connected in one and the same heating cable connection housing or heating cable connection housing.
  • the two end parts of the heating cable 32 are advantageously connected to one side of the housing 1 (FIGS. 7b and 7c), while the connecting cable 36 is located on the other side. This has the advantage that no feedback conductor or a second connection is required.
  • FIGS. 20 and 21 has a housing 101, preferably made of temperature-resistant plastic, which is tubular and has an internal thread 104 at each of the opposite end regions.
  • a sleeve screw 105 can be screwed into the two internal threads 104 on both ends of the housing 101.
  • Each sleeve screw 105 has a head 107 which is provided with flats 106 designed as flats.
  • the sleeve screw 105 also has an external thread 108 which extends up to the head 107 and which engages in the internal thread 104 of the housing 101.
  • the housing 101 shown here has at the opposite end regions each a cable entry 113 passing through the sleeve screw 105, through which a heating cable 132 is inserted in the housing 101 in such a way that it is flame-proof so that an extension of the heating cable corresponding to the respective requirements is possible with simple means .
  • the housing 101 not to be provided with two, but only with an internal thread 104 and only one sleeve screw 105, so that only a single cable entry 113 is provided on one end face of the housing 101. Otherwise, that is to say also on the end face opposite the single cable entry 113, the housing 101 is then completely closed, as a result of which a so-called heating cable termination is formed.
  • Each of the two cable entries 113 has an elastomer seal 115, a stop disc 116 and a pressure disc 117.
  • the elastomer seal 115 is located between the stop washer 116 and the pressure washer 117.
  • the pressure washer 117 bears against the thread-side end of the sleeve screw 105, while the step-like shouldered stop washer 116 is supported on a collar 128 formed on the inner wall of the housing 101.
  • the elastomer seal 115 consists of a high temperature resistant material, such as. As silicone or the like, and has a permanent temperature resistance, which is preferably substantially above 150 ° C.
  • the housing 101 which is preferably made of a thermosetting plastic, is designed to be temperature-resistant as a pressure-resistant encapsulation in such a way that perfect explosion protection is guaranteed even at high operating temperatures of the heating cables 132. Since the housing 101 consists entirely of an electrically insulating material, no additional insulating sheath is required in the interior 120, in which an insulating body 119 is located. The inner surface 131 of the housing 101 designed as an insulating sheath 118 surrounds the insulating body 119. The inner space 120 is not filled with a casting resin or the like as is customary, but is completely free from casting, so that the insulating body 119 is detachably mounted in the inner space 120. Thus, in the interior 120 on both end faces 122 of the insulating body 119 there is a free volume 121 which is not filled with potting compound or the like and which is also delimited on the opposite side by the pressure disk 116.
  • the insulating body 119 has protective conductor connections 125 to which the protective conductors 126 of the heating cables 132 inserted into the housing 101 from both sides are connected.
  • the insulating body 119 has terminals 124 to which the end parts 133 of the two heating cables 132 are connected.
  • it can also be expedient to insert a heating cable 132 in such a way that it cannot ignite against ignition and only on one of the two cable entries 113 and to clamp it on the insulating body 119, while no heating cable but an electrical connecting cable is introduced in the other opposite cable entry 113 so that it cannot ignite and can be connected to the insulating body 119.
  • an air and creepage distance 127 is provided on each of the two opposite end faces 122 of the insulating body 119, which is designed as a step-like gradation.
  • the insulating body 119 is supported with its right end face 122 in the drawing on a shoulder 123 formed on the inner surface 131 of the housing 101.
  • the housing 101 itself is designed to be relatively small in order to keep the total free volume 121 as small as possible and below ten cubic centimeters, the free volume 121 also being less than a third of the entire interior 120.
  • the housing 101 designed as a pressure-resistant encapsulation, is made of a high-temperature-resistant insulating material, so that even at high operating temperatures of e.g. A perfect explosion protection is guaranteed at 130 ° C and more. An explosion of an explosive mixture that may occur in the interior 120 is thus reliably resisted even at high heating temperatures. A transfer of the explosion from the interior 120 to the atmosphere surrounding the housing 101 is thereby reliably prevented.
  • the heating cable 132 passed through the sleeve screw 105, the thrust washer 117, the elastomer seal 115 and the stop disk 116 is firmly clamped in the cable entry 113, the elastomer seal 115 being pressed firmly against the circumference of the heating cable 132 via the pretensioning force of the sleeve screw 105.
  • the temperature-resistant elastomer seal 115 is detachably fixed in the opening 135 of the housing 101 via the tightened sleeve screw 105, a gap 134 being formed in the area of the circumferential surfaces of the pressure plate 117 and the stop plate 116 in.
  • the length of the explosion-proof gap 134 is designed in accordance with the size of the free volume 121 in the housing 101, so that a high explosion protection corresponding to the respective requirements is ensured in any case.
  • the two sleeve screws 105 are each assigned an anti-rotation bracket 142, which ensure that the two sleeve screws 105 of the fully assembled cable entries 113 are secured against unintentional loosening.
  • this anti-rotation bracket 142 can have a fastening part 109, a securing web 110, a holding web 111 and a nose 112.
  • the anti-rotation bracket 142 is made in one piece from the same material as a stamped and bent part made from sheet metal, as a result of which very simple and economical manufacture is possible.
  • the fastening part 109 of the anti-rotation bracket 142 is advantageously designed here as a circular ring part which surrounds the external thread 108 of the sleeve screw 105 and abuts the head 107 thereof.
  • the ring-shaped fastening part 109 and the holding web 111 which is rectangular in cross section are approximately at right angles to one another aligned, the retaining web 111 with its one surface 143 abuts the flat surface 103 formed on the outer circumference of the housing 101.
  • the nose 112 is formed, which is bent at right angles from the holding web 111 in the direction of the housing 101 and engages in a hole 146 in the housing 101.
  • the securing web 110 is formed on the side of the annular fastening part 109 opposite the holding web 111 and extends in the non-final assembly position transversely to the axis 160 of the housing 101.
  • the securing web 110 of the two anti-rotation brackets 142 is bent so that it extends approximately parallel to the axis 160 and lies flat against the wrench surface 106 of the sleeve screw 105, whereby the sleeve screw 105 is secured against unintentional rotation.
  • the securing web 110 is bent back approximately into the plane of the fastening part 109, so that the sleeve screw 105 can be loosened.

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  • Cable Accessories (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Processing Of Terminals (AREA)

Claims (21)

  1. Dispositif de connection d'un câble électrique chauffant, notamment d'un câble chauffant à auto-régulation (32, 132), dispositif dans lequel au moins une partie terminale de câble (33, 133) est mise en place dans un boîtier (1, 101) de façon à pouvoir être utilisée dans une atmosphère explosive, tandis qu'au moins un conducteur électrique est raccordé à un contact d'un corps isolant (19, 119), dispositif caractérisé en ce que le corps isolant (19, 119) est monté de façon amovible, en étant étroitement entouré, dans un espace interne non complètement rempli (20, 120) d'une enveloppe isolante (18, 118) résistant à la température de chauffage, la partie terminale (33, 133) du câble chauffant (32, 132) étant serrée, en étant protégée contre un claquage disruptif, dans une traversée d'un joint d'étanchéité en élastomère (15, 115) résistant à la température de chauffage, tandis que le câble chauffant (32, 132) remplit, avec le joint d'étanchéité en élastomère (15, 115) qui lui est associé, l'espace interne (20, 120) de l'enveloppe isolante (18, 118), et est fixé de façon amovible, avec un interstice protégé contreun claquage desruptif (34, 134) dans une ouverture (35, 135) d'une entrée de câble (13, 113) et le boîtier (1, 101) se présente comme un encapsulage résistant à la pression pour la température de chauffage du câble chauffant (32, 132), pour résister à la pression d'une explosion d'un mélange détonant dans l'espace interne (20, 120) de l'enveloppe isolante (18, 118), et empêcher la transmission de cette explosion à l'atmosphère entourant le boîtier (1, 101), caractérisé par les caractéristiques en partie connues en soi, à savoir :
    - l'enveloppe isolante (18, 118) et le boîtier (1, 101) forment un encapsulage tubulaire résistant à la pression,
    - une seconde entrée de câble (13, 113) est prévue à une extrémité frontale du boîtier (1, 101) tubulaire résistant à la pression, opposée à celle de la première entrée de câble (13, 113),
    - l'interstice (34, 134) protégé contre un claquage destructif est prévu à la périphérie du joint d'étanchéité en élastomère (15, 115) dans l'ouverture (35, 135) du boîtier (1, 101) tubulaire, résistant à la pression,
    - le corps isolant (19, 119) est étroitement entouré par l'enveloppe isolante (18, 118) tubulaire résistant à la pression,
    - l'enveloppe isolante (18, 118) tubulaire résistant à la pression dépasse frontalement, dans la direction axiale, le corps isolant (19, 119), et
    - un volume (21, 121) non complètement rempli de l'espace intérieur (20, 120) est prévu dans la zone de l'enveloppe isolante (18, 118) tubulaire résistant à la pression, qui prolonge la face frontale, et est délimité également par au moins l'une des faces frontales (22, 122) du corps isolant (19, 119).
  2. Dispositif selon la précédente revendication, caractérisé en ce que le volume libre non rempli (21, 121) dans l'espace interne de l'enveloppe isolante (18, 118) entourant étroitement le corps isolant (19, 119) représente au plus un tiers du volume total de l'espace interne (20, 120) et est, de préférence, inférieur à dix centimètres-cubes, l'enveloppe isolante (18, 118) dépassant frontalement en direction axiale le corps isolant (19, 119) et, dans cette zone se raccordant frontalement, est prévu le volume libre non rempli (21, 121) de l'espace interne (20, 120).
  3. Dispositif selon une des précédentes revendications, caractérisé en ce que le corps isolant (19, 119) prend appui, par une de ses faces frontales (22, 122), contre un épaulement (23, 123) de l'enveloppe isolante (18, 118), et ce corps isolant (19, 119) comporte, au moins sur l'une de ses faces frontales (22, 122) délimitant ensemble le volume libre (21, 121) et entre un raccordement de conducteur de protection (25, 125) et les bornes de raccordement (24, 124) du conducteur électrique, une ligne d'air et de fuite (27, 127), de préférence en forme de marche d'escalier.
  4. Dispositif selon une des précédentes revendications, caractérisé en ce que le joint d'étanchéité en élastomère (15, 115) associé à la partie terminale (33, 133) du câble chauffant (32, 132) est serré entre une rondelle de butée (16, 116), tournée vers le volume libre (21, 121) de l'espace interne (20, 120) et prenant appui sur un bandeau (28, 128) du boîtier (1, 101) et une rondelle de poussée (17, 117) placée en face, qui est pressée contre le joint d'étanchéité (15, 115) au moyen d'une douille filetée (5, 105), laquelle est vissée dans un filetage (4, 104) du boîtier (1,101).
  5. Dispositif selon une des précédentes revendications, caractérisé en ce que la douille filetée (5) fixant le câble chauffant (32) est bloquée par une vis de sécurité (9) pouvant être manoeuvrée avec un outil spécial et qui vient radialement en prise dans un évidement (8) se présentant de préférence, sous la forme d'une gorge axiale sur la périphérie de la douille filetée (5), tandis que le boîtier (1) résistant à la pression est essentiellement de forme tubulaire et comporte une partie (2) de paroi épaissie dans laquelle la vis de sécurité (9) est montée, de préférence imperdable, dans un trou transversal (10).
  6. Dispositif selon une des précédentes revendications, caractérisé en ce qu'à la douille filetée (5, 105) est associé un étrier de blocage en rotation (42, 142) qui est fixé sur une partie (2, 102) du boîtier (1, 101) résistant à la pression, tandis qu'une extrémité (44, 110) de cet étrier s'applique contre un méplat de la douille filetée (5, 105) réalisé de préférence sous la forme de surface-clé.
  7. Dispositif selon une des précédentes revendications, caractérisé en ce que l'étrier (42) de blocage en rotation comporte un téton d'arrêt (45) venant en prise dans un perçage (46) du boîtier (1), et cet étrier est fixé à la partie (2) de la paroi par la vis de sécurité (9), tandis que la partie de paroi épaissie (2) du boîtier (1) comporte extérieurement une surface plane (3, 3'), contre laquelle l'étrier de blocage en rotation (42) s'applique par une surface (43) et à côté de l'une (3) des surfaces extérieures planes du boîtier (1), il est prévu, formant un angle avec celle-ci, une seconde surface plane (3') avec, dans la partie de paroi (2), un trou transversal supplémentaire (10) pour une seconde vis de sécurité (9) et un perçage (46) pour le téton d'arrêt (45) d'un second étrier de blocage en rotation (42), et la douille filetée (5) fixant le câble chauffant (32) comportant un soulagement de traction (14), dans lequel la partie terminale (33) du câble chauffant (32) est serrée entre deux mâchoires de serrage (48, 48').
  8. Dispositif selon une des précédentes revendications, caractérisé en ce que, dans le cas où le boîtier (1) résistant à la pression est réalisé en métal, un trou fileté (11) pour une vis de raccordement à la terre est disposé extérieurement sur la partie (2) de paroi épaissie, l'enveloppe isolante (18) entourant étroitement le corps isolant (19) dans le boîtier métallique (1) se présentant sous la forme d'une gaine tubulaire à paroi mince, et au moins une pièce recourbée élastique (30), reliée au raccordement (25) du conducteur de protection du corps isolant (19) travers un ajour (29) dans la paroi périphérique de l'enveloppe isolante (18) et s'applique contre la surface interne (21) du boîtier métallique (1) résistant à la pression.
  9. Dispositif selon une des précédentes revendications, caractérisé en ce que l'enveloppe isolante (18, 118) entourant étroitement le corps isolant (19, 119) est réalisée sous la forme d'une partie constitutive intégrée, venue d'une seule pièce dans un matériau homogène avec la paroi, constituée de matière plastique, du boîtier (1, 101) résistant à la pression.
  10. Dispositif selon une des précédentes revendications, caractérisé en ce qu'à l'extrémité frontale, opposée au guidage de câble (13,113) du câble chauffant (32, 132) à une des extrémités frontales du boîtier tubulaire (1, 101) il est prévu une seconde entrée de câble (13, 113) avec un second joint d'étanchéité en élastomère (15, 115) entre une rondelle de butée (16, 116) et une rondelle de poussée (17, 117) à laquelle est associée une douille filetée (5, 105).
  11. Dispositif selon une des précédentes revendications, caractérisé en ce que le boîtier résistant à la pression (1, 101) fermé tout autour, comporte exclusivement une unique entrée (13, 113) de câble chauffant, et constitue une terminaison de câble chauffant fermant, de façon étanche, l'extrémité du câble chauffant (32, 132).
  12. Dispositif selon une des précédentes revendications, caractérisé en ce que la douille filetée (5) de l'une des entrées de câble (13) est susceptible, sur son côté opposé au boîtier (1) résistant à la pression, d'être fixée, par l'intermédiaire d'un tube fileté (39) et en étant protégée contre un claquage disruptif, à la paroi d'un boîtier de raccordement (38) par un écrou (41) placé contre la face interne (40) de cette paroi.
  13. Dispositif selon une des précédentes revendications, caractérisé en ce que la partie terminale (33) d'un câble chauffant (32) à un seul conducteur est fixée dans l'entrée de câble (13) du boîtier (1) résistant à la pression, tandis que l'unique conducteur du câble chauffant est raccordé à la borne (24) du corps isolant (19) (figures 7a et 13a).
  14. Dispositif selon une des précédentes revendications, caractérisé en ce que les parties terminales (33) de deux câbles chauffants (32) à un seul conducteur sont fixées ensemble dans l'une des entrées (13) de câble chauffant du boîtier (1) résistant à la pression, tandis que les deux conducteurs de câbles chauffants sont raccordés à la borne (24) du corps isolant (19) (figures 7a et 13b).
  15. Dispositif selon une des précédentes revendications, caractérisé en ce que le corps isolant (19) avec les bornes de raccordement (24) pour les conducteurs de câble chauffant dans le boîtier (1) résistant à la pression, comporte deux parties enfichables (58, 58') susceptibles d'être enfichées l'une dans l'autre, et qui, sur leurs extrémités frontales (59) en regard l'une de l'autre, revêtent de préférence la forme de gradins venant en prise l'un dans l'autre (figures 7c et 13c).
  16. Aménagement du dispositif selon une des précédentes revendications, sur un tube de production devant être chauffé par le câble chauffant, et qui est enveloppé avec un isolant, aménagement caractérisé en ce que le boîtier (1) résistant à la pression est fixé à l'intérieur de l'isolant (52), directement contre le tube de production (50), de préférence avec une bande de fixation (51), tandis qu'un câble de raccordement (36) est amené à l'extérieur au moyen d'une traversée (53) pourvue d'un étanchement élastique (57) sur une gaine externe (56) de l'isolant (52).
  17. Aménagement du dispositif selon une des précédentes revendications, sur un tube de production devant être chauffé par le câble chauffant et qui est enveloppé par un isolant, aménagement caractérisé en ce que le boîtier (1) résistant à la pression est disposé en dehors de l'isolant (52), pénètre avec l'entrée de câble (13) dans l'isolant (52), est pourvu d'un étanchement élastique (57) sur la gaine externe (56), et est fixé sur le tube de production (50) par l'intermédiaire d'un étrier de maintien (54) traversant l'isolant (52).
  18. Dispositif selon une des précédentes revendications, caractérisé en ce que l'étrier de blocage en rotation (142) comporte une partie de fixation qui revêt, de préférence, la forme d'une pièce annulaire, enserrant au moins partiellement la douille filetée (105) sur laquelle elle est maintenue, et comporte au moins une barrette de blocage (110), qui peut être repliée contre le méplat (106) de la douille filetée (105).
  19. Dispositif selon une des précédentes revendications, caractérisé en ce que l'étrier de blocage en rotation (142) comporte une barrette de maintien (111) qui part de la partie de fixation (109) et s'applique par sa surface (143) tournée vers le boîtier (101) contre la surface plane (103) de ce boîtier (101), et qui, par une bec (112) prévu à son extrémité éloignée de la partie de fixation (109) et dirigé transversalement, vient en prise dans un trou (146) du boîtier (101), cependant que la barrette de blocage (110) et la barrette de maintien (111) de l'étrier de blocage en rotation (142) sont, de préférence, disposées sur des côtés diamétralement opposés de la partie de fixation (109).
  20. Dispositif selon une des précédentes revendications, caractérisé en ce que l'étrier de blocage en rotation (142), avec sa partie de fixation (109), sa barrette de blocage (110), sa barrette de maintien (111), et son bec (112), est réalisé d'une seule pièce en un matériau homogène, de préférence sous la forme d'une pièce en tôle estampée et pliée.
  21. Dispositif selon une des précédentes revendications, caractérisé en ce qu'au moins un câble chauffant (132) est introduit, en étant protégé contre un claquage disruptif, dans le boîtier (101) aux deux entrées de câble opposées (113), tandis que le corps isolant (119) dans le boîtier (101), pour permettre le raccordement du câble (132) amené par les deux entrées de câble opposées (113), comporte, sur chacun de ses deux côtés frontaux (122) placés l'un en face de l'autre, de préférence une ligne d'air et de fuite (127) en forme de gradin.
EP86100003A 1985-01-05 1986-01-02 Dispositif de connexion pour un câble chauffant Expired - Lifetime EP0187636B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86100003T ATE42885T1 (de) 1985-01-05 1986-01-02 Elektrische heizkabelanschlubvorrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3500232 1985-01-05
DE3500232A DE3500232C1 (de) 1985-01-05 1985-01-05 Einrichtung fuer ein elektrisches Heizkabel

Publications (3)

Publication Number Publication Date
EP0187636A1 EP0187636A1 (fr) 1986-07-16
EP0187636B1 EP0187636B1 (fr) 1989-05-03
EP0187636B2 true EP0187636B2 (fr) 1993-12-29

Family

ID=6259317

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86100003A Expired - Lifetime EP0187636B2 (fr) 1985-01-05 1986-01-02 Dispositif de connexion pour un câble chauffant

Country Status (3)

Country Link
EP (1) EP0187636B2 (fr)
AT (1) ATE42885T1 (fr)
DE (2) DE3500232C1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3639485A1 (de) * 1986-11-18 1988-05-26 Karl Kapfer Explosionsgeschuetztes elektrisches geraet
US4883945A (en) * 1988-12-08 1989-11-28 Raychem Corporation Connector for electrical heater
DE4108901C2 (de) * 1991-03-19 1994-12-01 Reinhold Barlian Einrichtung zum Anschließen und Verbinden einer elektrischen Leitung
DE19726419A1 (de) * 1997-06-23 1999-01-28 Daimler Benz Aerospace Airbus Heizleiter-Verbindungssystem in einem Flugzeug
DE19726418A1 (de) * 1997-06-23 1999-01-28 Daimler Benz Aerospace Airbus Heizleiter-Verbindungssystem
DE19751844C2 (de) * 1997-11-22 2001-03-22 Reinhold Barlian Einrichtung zum Anschließen und Verbinden einer Leitung
DE19948819C2 (de) 1999-10-09 2002-01-24 Airbus Gmbh Heizleiter mit einem Anschlußelement und/oder einem Abschlußelement sowie ein Verfahren zur Herstellung desselben
EP1313351A1 (fr) * 2001-11-16 2003-05-21 Thermon Europe B.V. Manchon de jonction pour câbles chauffants
DE10219019B3 (de) * 2002-04-27 2004-01-15 Bartec Componenten Und Systeme Gmbh Einrichtung zur Verbindung zweier elektrischer Kabel
DE102012216383A1 (de) * 2012-09-14 2014-03-20 Phoenix Contact Gmbh & Co. Kg Hülsendichtung
CN108593698B (zh) * 2018-03-20 2020-11-20 浙江启博知识产权运营有限公司 一种地热电缆制造用加热装置
CN110416936B (zh) * 2019-08-08 2024-06-25 常州市沃科科技有限公司 一种防火防爆隔热毯、电缆、电缆接头及电缆铺设结构
CN115021196B (zh) * 2022-06-06 2023-07-25 国网河南省电力公司邓州市供电公司 一种应用于电缆连接处的防火爆装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2046102A (en) * 1931-07-30 1936-06-30 Gen Electric Electric terminal connection
US2269194A (en) * 1939-12-19 1942-01-06 Gen Electric Electric heater
FR1244373A (fr) * 1959-09-14 1960-10-28 Nec Perfectionnements aux systèmes de raccordement électrique des éléments chauffants blindés
DE1440855A1 (de) * 1963-10-15 1968-11-14 Oskar Biegel Gmbh Wasser- und gasdichte Schnellverbindungsmuffe fuer elektrische Kabel
DE2011392A1 (de) * 1970-03-11 1971-09-23 Karl Henning & Co Elektrische Heizkabelanordnung
FR2221061A7 (en) * 1973-03-07 1974-10-04 Thermo Controle Connections to ground resistance heating elements - have junction box and ground contact area used to dissipate heat
CH584310A5 (fr) * 1974-11-06 1977-01-31 Elcalor Ag
US4388523A (en) * 1981-06-10 1983-06-14 Multistress, Inc. Electrical heating cable connector

Also Published As

Publication number Publication date
ATE42885T1 (de) 1989-05-15
DE3500232C1 (de) 1986-08-14
EP0187636A1 (fr) 1986-07-16
EP0187636B1 (fr) 1989-05-03
DE3663222D1 (en) 1989-06-08

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