EP0408476A2 - Energieversorgungskabel mit innerer Fluidkühlung - Google Patents

Energieversorgungskabel mit innerer Fluidkühlung Download PDF

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Publication number
EP0408476A2
EP0408476A2 EP90420327A EP90420327A EP0408476A2 EP 0408476 A2 EP0408476 A2 EP 0408476A2 EP 90420327 A EP90420327 A EP 90420327A EP 90420327 A EP90420327 A EP 90420327A EP 0408476 A2 EP0408476 A2 EP 0408476A2
Authority
EP
European Patent Office
Prior art keywords
sleeve
sleeves
cable
cylindrical
ring
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.)
Withdrawn
Application number
EP90420327A
Other languages
English (en)
French (fr)
Other versions
EP0408476A3 (en
Inventor
Jean Claude Fuchs
Thierry Varillon
Karol Trzecinski
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Erico France SARL
Original Assignee
Erico France SARL
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 Erico France SARL filed Critical Erico France SARL
Publication of EP0408476A2 publication Critical patent/EP0408476A2/de
Publication of EP0408476A3 publication Critical patent/EP0408476A3/fr
Withdrawn legal-status Critical Current

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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
    • H05B7/00—Heating by electric discharge
    • H05B7/02—Details
    • H05B7/11—Arrangements for conducting current to the electrode terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/42—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction
    • H01B7/421—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction for heat dissipation
    • H01B7/423—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction for heat dissipation using a cooling fluid
    • H01B7/425—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction for heat dissipation using a cooling fluid the construction being bendable

Definitions

  • Installations requiring high currents such as electric, art or induction ovens or magnet coils, are supplied by electrically conductive cables cooled by a fluid, such as water or air.
  • These cables are composed of one or more electrically conductive bundles, distributed in a ring around a tubular core or an axial bundle, and an external, flexible sheath, enveloping the bundles, forming with them, an annular passage for the cooling fluid, a fluid also circulating between the bundles and possibly between the strands of the bundles.
  • the cable ensuring the supply of the electrodes is placed between the articulated gantry and a fixed electrical supply station, forming an open "U" upwards, as shown in Figure 1 attached.
  • the power cable is subjected to bending then twisting stresses, which are exerted on the beams conductors and on the envelope.
  • the external envelope made of flexible and elastically deformable material, twists around its axis, forming helical folds causing, over time, localized wear and formation holes allowing the coolant to leak and leading to the cable being rejected.
  • one of the cable fixing lugs by including to this lug means promoting the pivoting of the sheath relative to it such as a rotary joint eliminating any formation of folds on the sheath during rotational movements of the cable, when the oven is opened and closed.
  • This solution has the drawback of adding a function to the terminal which, in addition to its normal functions of fixing and electrical conduction, already has a function of connecting the sheath to the cooling circuit. In other words, this solution complicates the production of the stock and increases its cost significantly.
  • the object of the present invention is to remedy this by providing an electrical supply cable insensitive to torsional movement which is simple to produce, inexpensive, resistant and reliable.
  • the rotary joint is disposed at a distance from the terminal connecting to the mobile device which must be supplied, but on one of the two parts of the cable which are substantially vertical, when this cable is in the position of use, and in the interval between two sections of sheath, namely a long section, of constant length, and a short section of adjustment to the total length of the cable, this rotary joint being composed of two sleeves tubular each having a part for connection to the section of the sheath, and a reciprocal junction part with, on the one hand, fluid and dust seals, and on the other hand, means of connection in longitudinal translation .
  • the junction part of one of the sleeves of the rotary joint comprises externally and going from its free end in the direction of its connection part to the sheath, a cylindrical sealing surface , a threaded area of larger diameter than the aforementioned bearing and a cylindrical bearing of larger diameter than the threaded area with a circular groove for an O-ring sealing against dust
  • the joining part of the other sleeve comprises , internally and going from its free end towards its connection zone to the sheath, on the one hand, a cylindrical zone capable of cooperating with the aforementioned O-ring, on the other hand, a threaded zone capable of being screwed on that mentioned above by constituting with it means for wedging in translation the two sleeves and means for guiding in rotation, and finally, a cylindrical zone of smaller diameter than the threaded zone and com carrying a groove for a fluid-tight O-ring capable of cooperating with the outer cylindrical face of smaller diameter of the other sleeve.
  • the rotational and translational connections between the two sleeves are provided by the two threads, that is to say by simple means, inexpensive to produce and easy assembly.
  • FIG. 1, 2 designates, in general, the cable according to the invention, comprising at each of its ends, a terminal 3a-3b allowing its fixing.
  • the terminal 3a is connected to the fixed supply station such as a transformer while that 3b is connected to the mobile device which must be supplied with power such as the electrode holder of an oven.
  • this cable is composed of a conductive part 4 constituted by one and preferably several bundles of electrically conductive cables arranged in a ring around another bundle or a tubular core 5.
  • 6 generally designates a flexible tubular sheath, made of rubber or elastomer and delimiting with the conductive part of the cable 4 an annular chamber 7, visible in FIG. 2, serving for the passage of the cooling fluid, such as water or air.
  • the cable is provided with a rotary joint generally designated by 8 which is arranged at a distance from the thimble 3b, and on the part of the cable which is substantially vertical in the position of use, position in which the cable forms a "U", as shown in FIG. 1.
  • This rotary joint is arranged at the junction of two sheath sections, namely a section A said to be long, and a short section B for length adjustment.
  • the section A has a length making it possible to use, without cutting, a sheath 6 of length commonly marketed, while the section B has a length D whose minimum value is defined to give a total length of the cable equal to the shortest length requested for the type of installation concerned.
  • this length D is defined according to the needs of the installation. It should be noted here that the use of two sections, one A of constant length, the other B of variable length, makes it possible to make the best use of the sheaths available on the market but also the numerous falls which, up to present, were not usable and were stored for disposal. In other words, this mode of constitution of the cable avoids the additional costs consecutive to the use of a sheath longer than the needs and the excess of which was not used.
  • This rotary joint can be produced in many ways provided that it comprises two sleeves each comprising means for connecting the ends 6a or 6b of the sheath sections, reciprocal joining means and sealing means.
  • the rotary joint is composed of two sleeves 9 and 10 respectively having on their opposite ends means for connecting the ends 6a-6b of the sheath sections. These means consist of grooves 12 for anchoring the sheath when the latter is tightened by collars 13.
  • the sleeve 10 comprises successively, going from its free end towards its connection zone to the sheath, on the one hand, an external cylindrical surface 14, on the other hand an external threaded zone 15 of larger diameter than the surface 14 and, finally, a cylindrical surface 16 of larger diameter than the threaded zone 15 and provided with a groove for an O-ring 18.
  • the sleeve 9 comprises, going from its free end in the direction of its connection zone to the sheath and successively, an internal cylindrical zone 19, capable of constituting sealing for the seal 18, an internal thread 20 of smaller diameter than the aforementioned zone 19, and an internal cylindrical zone 22 of smaller diameter than the thread, but comprising a groove for a seal 24 capable of coming into contact i on the cylindrical face 14 of the other sleeve.
  • the seal 24 seals the junction device with the water flowing in the cooled cable, while the seal 18 seals against dust.
  • the embodiment shown in FIG. 7 differs from the previous one by the shape of the means of connection in translation between the two sleeves 9 and 10.
  • the sleeve 10 comprises, from its end to its connection zone, a cylindrical seat 14 connected by a shoulder 24 to an external cylindrical zone 16 of larger diameter similar to that of the previous embodiment.
  • the sleeve 9 comprises between the internal bore 22, of smaller diameter and the internal bore 19 of larger diameter, a bore 27, of intermediate diameter, connecting to the bore 22 by an internal circular groove 28 .
  • connection between the two sleeves and provided by a discontinuous circular flange 29 being housed in the groove 28 and projecting externally from fragments of circular crown 30 bonded to the bore 14 of the sleeve 10 during the assembly of the two sleeves 9 and 10.
  • the rotary joint is composed of two identical sleeves, generally designated by 32, and by a common connecting piece 33.
  • Each of the sleeves has a part with grooves 12, allowing its connection with the end 6a or 6b of the sheath, and a bell-shaped part 34 comprising an internal shouldered housing 35.
  • the connecting piece 33 is constituted by a socket in which a groove 36 delimits two shoulders 37 each comprising a circular groove for an external O-ring 39.
  • the sleeves 32 and the sleeve 33 can pivot relatively with respect to each other to remove in the section A of the sheath 6 all torsional stresses, during the rotation of the cable.
  • the sleeves 43 are identical and associated with a common connecting piece 44.
  • Each of the sleeves is provided, opposite its connection end on the sheath, with a shoulder external 45 forming a collar provided with a peripheral groove for an O-ring 47.
  • the connecting piece 44 is constituted by a cylindrical sleeve provided near its ends with circular grooves 48 for positioning stop rings 49.
  • the embodiment shown in Figure 5 is a combination of the embodiments shown in Figures 3 to 4.
  • one of the sleeves is identical to that shown at 32 in Figure 3, that is to say comprises a bell-shaped part 34 with internal shouldered housing 35, into which opens a groove 42 for a stop ring 40.
  • the other sleeve it is identical to that 43 shown in FIG. 4, dire has, in the junction zone, a shoulder 45 with external circular groove for an O-ring 47.
  • the shoulder 45 forming a sort of flange, is mounted to rotate freely in the internal housing 35 of the other sleeve 32 and is wedged in translation in this sleeve by the stop ring 42.
  • the seal provided by the seal 47 is completed by another seal 50 interposed between the faces opposite the two sleeves.
  • each of the sleeves 60 are identical and each comprise a notched external face 62 and a cylindrical and smooth internal face 63.
  • One end of each sleeve is provided with a straight end face 64, while the the other end is internally chamfered at 65.
  • each of the sleeves 62 is provided with an internal groove for an O-ring 66.
  • these two sleeves are wedged in translation, by a common junction piece constituted by a cylindrical sleeve 67 on which they are arranged. The ends 66a of this socket are folded back against their chamfers 65.
  • the water tightness is ensured by the seals 66, while the dust tightness is ensured by elastic ring 65 which extends below the ends of the sheaths 6a and 6b and which is compressed between the end faces 64 of the sleeves.
  • this rotary joint performs well the function assigned to it by using inexpensive parts to produce, easy to assemble and by forming a thin structure. not disturbing the circulation of the cooling fluid which can be water, as described above, but which can also be air.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Cable Accessories (AREA)
  • Joints Allowing Movement (AREA)
EP19900420327 1989-07-13 1990-07-10 Power-supply cable with internal fluid cooling Withdrawn EP0408476A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8909949A FR2649837B1 (fr) 1989-07-13 1989-07-13 Cable d'alimentation electrique a refroidissement par fluide interne
FR8909949 1989-07-13

Publications (2)

Publication Number Publication Date
EP0408476A2 true EP0408476A2 (de) 1991-01-16
EP0408476A3 EP0408476A3 (en) 1991-04-10

Family

ID=9384080

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900420327 Withdrawn EP0408476A3 (en) 1989-07-13 1990-07-10 Power-supply cable with internal fluid cooling

Country Status (2)

Country Link
EP (1) EP0408476A3 (de)
FR (1) FR2649837B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0511609A1 (de) * 1991-04-29 1992-11-04 BRAR ELETTROMECCANICA S.r.l. Stromzuführungskabel für Lichtbogenöfen
EP1179824A3 (de) * 2000-08-11 2004-05-12 Alcatel Temperatur beständiges Nachrichtenkabel
US7592546B2 (en) 2002-11-05 2009-09-22 Volvo Lastvagnar Ab Cable duct for a vehicle
CN115954701A (zh) * 2023-03-10 2023-04-11 广州市信征汽车零件有限公司 一种电动汽车用高压线束总成

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3917898A (en) * 1971-10-22 1975-11-04 Showa Electric Wire & Cable Co Water-cooled cable

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0511609A1 (de) * 1991-04-29 1992-11-04 BRAR ELETTROMECCANICA S.r.l. Stromzuführungskabel für Lichtbogenöfen
EP1179824A3 (de) * 2000-08-11 2004-05-12 Alcatel Temperatur beständiges Nachrichtenkabel
US7592546B2 (en) 2002-11-05 2009-09-22 Volvo Lastvagnar Ab Cable duct for a vehicle
CN115954701A (zh) * 2023-03-10 2023-04-11 广州市信征汽车零件有限公司 一种电动汽车用高压线束总成
CN115954701B (zh) * 2023-03-10 2023-05-05 广州市信征汽车零件有限公司 一种电动汽车用高压线束总成

Also Published As

Publication number Publication date
EP0408476A3 (en) 1991-04-10
FR2649837A1 (fr) 1991-01-18
FR2649837B1 (fr) 1991-10-25

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