EP0107530A2 - Tragender Nulleiter für elektrische Leiterbündel Verfahren zum Herstellen und Verarbeitungsmittel - Google Patents

Tragender Nulleiter für elektrische Leiterbündel Verfahren zum Herstellen und Verarbeitungsmittel Download PDF

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Publication number
EP0107530A2
EP0107530A2 EP83401789A EP83401789A EP0107530A2 EP 0107530 A2 EP0107530 A2 EP 0107530A2 EP 83401789 A EP83401789 A EP 83401789A EP 83401789 A EP83401789 A EP 83401789A EP 0107530 A2 EP0107530 A2 EP 0107530A2
Authority
EP
European Patent Office
Prior art keywords
core
conductor
metallic
metallic core
insulating sheath
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Withdrawn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
EP83401789A
Other languages
English (en)
French (fr)
Other versions
EP0107530A3 (de
Inventor
Rémy Kowalski
Noel Demaret
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.)
THOMSON JEUMONT CABLES
Original Assignee
THOMSON JEUMONT CABLES
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
Priority claimed from FR8216155A external-priority patent/FR2533744A1/fr
Priority claimed from FR8308823A external-priority patent/FR2546658B2/fr
Application filed by THOMSON JEUMONT CABLES filed Critical THOMSON JEUMONT CABLES
Publication of EP0107530A2 publication Critical patent/EP0107530A2/de
Publication of EP0107530A3 publication Critical patent/EP0107530A3/de
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/0006—Apparatus or processes specially adapted for manufacturing conductors or cables for reducing the size of conductors or cables
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines
    • D07B7/02—Machine details; Auxiliary devices
    • D07B7/027—Postforming of ropes or strands
    • 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
    • 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
    • H01B7/02—Disposition of insulation
    • H01B7/0208—Cables with several layers of insulating material
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2015—Strands
    • D07B2201/2016—Strands characterised by their cross-sectional shape
    • D07B2201/2018—Strands characterised by their cross-sectional shape oval
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2015—Strands
    • D07B2201/2019—Strands pressed to shape
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2501/00—Application field
    • D07B2501/40—Application field related to rope or cable making machines
    • D07B2501/406—Application field related to rope or cable making machines for making electrically conductive cables

Definitions

  • the present invention relates to a neutral carrier conductor for a bundle of electrical conductors, a method of manufacturing this neutral carrier conductor, and means for implementing this method.
  • a bundle of insulated electrical conductors from an electricity distribution network for example frequently comprises an insulated neutral conductor acting as a carrier around which are twisted insulated phase conductors or other electrical conductors of this network, for example conductors public lighting.
  • the neutral carrying conductor comprises a metallic core made up of metallic wires cabled in a strand or cord, and an outer insulating sheath.
  • the twisted beam is stretched on poles or on the facades of buildings by means of its neutral carrying conductor.
  • this neutral carrying conductor must have good mechanical resistance to support the weight of the other conductors of the bundle, and an outer insulating sheath having good sliding resistance on its metallic core under the effect of the weight of the other conductors. This sliding can cause either a rupture of the insulating sheath of this neutral conductor, or an untimely displacement of the other conductors of the bundle.
  • the neutral carrying conductor must also have an insulating sheath easily detachable from its metallic core when making a branch connection for example.
  • the neutral carrying conductor 1 illustrated in FIGS. 1 and 2 comprises a metallic core 2 constituted by metallic wires 3 wired in strand or cord, a non-sticky separating coating 4, constituted by a layer of paper, and an insulating outer sheath 5.
  • the metal wires 3 of the core 2 consist of metal or metal alloy wires whose mechanical strength and electrical conductivity correspond to the installation and operating requirements requested.
  • the metal core 2 comprises a compact non-circular cross section, preferably oval, formed of wires 3 individually having a bare metal surface condition, devoid of any trace of lubricant.
  • the non-sticky separating coating 4 intimately follows the reliefs and the hollows of the twisted profile of the metallic core 2 and the outer insulating sheath 5 tightening the separating coating 4 against this metallic core 2, penetrates into the crevices of the inequalities surface of this core 2.
  • the outer insulating sheath 5 is made of a known insulating material whose mechanical and electrical characteristics correspond to the desired characteristics.
  • the neutral carrying conductor 1 intended to produce a twisted bundle of aluminum electrical conductors, comprises a metallic core 2 consisting of seven wires made of an aluminum alloy marketed under the designation AGS, a coating separator 4 consisting of a paper tape and an outer insulating sheath 5 in crosslinked polyethylene.
  • the adhesion of the outer insulating sheath 5 on the metallic core 2 of the neutral carrying conductor 1 can be measured according to French standard NFC 33209 according to which a length of sheath 5 is maintained on the metallic core 2 of a section of neutral carrying conductor 1 stripped at both ends.
  • This conductor section is mounted in a known manner in a known type of traction machine, so that on one side one end of its metallic core 2 is firmly held by a first jaw of this machine, and on the opposite side the length of sheath is slid over this core 2 by means of a rotary assembly pulled by a second jaw of this machine.
  • the insulating material constituting the sheath 5 being separated by the separating coating 4 does not stick to the wires of the metallic core 2 like that in certain known neutral carrying conductors and therefore does not interfere with the electrical conductivity of this branch connection.
  • a method for producing the neutral carrying conductor 1 comprises at least one wire drawing without lubricating metallic wires 3 with a view to obtaining wires free from any trace of lubricant, laying lengthwise around the metallic core 2 formed of a strand of metal wires 3, devoid of lubricant, wired and subjected to compaction, of a non-stretched ribbon of non-sticky material chosen to constitute a separating coating 4 and an extrusion under high pressure of an insulating material serving of insulating sheath 5, on this separating coating 4 with a view to making this non-stretched separating coating and this insulating material penetrate into the least surface unevenness of this metallic core 2.
  • a drawing without lubricant for obtaining son 3 devoid of traces of lubricant for the constitution of the core metal 2 of the holder neutral conductor 1 is achieved by means of material in channels having a hardness greater than 9 'wide hardness of minerals known as the Mohs scale.
  • the hardened steel has a hardness equal to 6.5 and the diamond has a hardness equal to 10.
  • an absence of trace of lubricant on the core 2 indeed greatly increases the slip resistance of the sheath 5.
  • an oval cross section of the metallic core 2 greatly impedes the rotation and the sliding of the sheath 5 on this twisted metallic core 2 and thus increases the sliding resistance of the sheath 5 on this soul 2.
  • An implantation of the material of the sheath 5 in the crevices of the surface unevenness of the metallic core 2 contributes to impeding the sliding of the sheath 5 on this core 2.
  • the coating 4 is not torn during extrusion under high pressure of the sheath 5, the material constituting the sheath 5 does not stick directly to the metal core 2 and the sheath 5 is easily detachable from the latter.
  • the separating coating 4 is usually placed taut on the metal core 2 and the sheath 5 is extruded under a pressure usually applied in the insulation of the electrical conductors.
  • the stretched separating coating 4 cannot match the surface unevenness of the metal core 2 and the material constituting the sheath 5 cannot penetrate into the crevices of these surface unevenness of the core 2.
  • the sheath 5 known neutral conductors does not therefore have sufficient resistance to its sliding on the metallic core of the latter.
  • Extrusion under high pressure of the sheath 5 can advantageously be followed by a heat treatment under pressure which maintains, until the final stage of its production, the tightening of the sheath 5 on the metallic core 2.
  • An installation for the chain production of a neutral conductor carrier 1 of the first example, implementing the method of the invention mainly comprises a known type of stranding machine, a laminating device of the type with double pair of rollers, a setting device a separating coating tape, an insulation machine such as an extruder of the matrix type and punch adjustable in position, a known assembly with a tube for heat treatment of the insulating sheath 5 by pressurized steam or possible LEMENT by any other crosslinking system and a storage winder of known type.
  • the metal wires 3 devoid of lubricant are unwound and formed continuously in a strand or cord twisted in the stranding machine.
  • the strand or twisted cord of wire which constitutes the metal core 2 passes through the roller laminator to receive a compaction and according to the first embodiment, an ovalization of the cross section.
  • the twisted, compact cord with an oval cross-section passes through the separating coating installation device 4 which is in the example illustrated a paper tape, and leaves it covered with a layer of non-stretched separating paper, laid lengthwise.
  • the cord provided with its separating coating enters the extruder to receive under pressure an insulating sheath 5.
  • the neutral carrying conductor thus produced then crosses the tubular heat treatment assembly before being wound up at the end of the chain in the winding machine. storage.
  • FIG. 2 A part of this installation is schematically illustrated in FIG. 2 showing a strand or cord 6 formed from metallic wires 3 wired and assembled by passing through a die 7 of a stranding machine 8 partially shown.
  • the strand or cord 6 then passes through a laminating device 9 to be transformed, after compaction and ovalization of its cross section, a twisted metal core 2, of the neutral carrying conductor 1.
  • the laminating device 9 is a device of known type comprising two pairs of rollers tightening in their grooves the strand or cord 6: a horizontal pair of rollers 10 ( Figures 2 and 4) and a vertical pair of rollers 11 ( Figures 2 and 3).
  • the grooves of the two pairs of rollers successively form circular passages for the metal core or cable subjected to compaction.
  • the metal core or cable exiting from this rolling machine is provided with a circular cross section.
  • the apparatus to laminator 9 is provided with a first pair of rollers 10, the central zone of the bottom of the grooves having the same radius of curvature 13 is connected to the lateral zones of these grooves which have radii of curvature 14 larger than these radii of curvature 13 so that the grooves of this pair of rollers 10 form an oval passage for the strand or cord 6 and of a second pair of rollers 11 whose grooves have the same radius of curvature 12 so that these grooves form a circular passage for the strand or cord 6.
  • the cord or strand 6 by passing through the laminator 9 of FIG. 2 is first subjected to a first compaction and a simultaneous ovalization of the section transverse under the action of the rollers of the first pair 10 then a second compacting further reducing the dimensions or diameters of the cross section while retaining ovalization, under the action of the rollers of the second pair 11.
  • the difference between the spokes 13 of the central zone of the bottom of the grooves of these rollers and the larger spokes 14 of the lateral zones of these grooves is greater than or equal to 0.125 millimeter .
  • the large dimension or major axis of this oval cross section is greater than or equal to 9, 45 millimeters.
  • this metallic core 2 provided with its separating coating 4 passes first through a wire guide or punch then through a die or which are axially aligned and spaced from each other. In the extruder the insulating material is pushed through the space separating these wire guide and die to wrap the metallic core 2 which runs there.
  • the die gives its cylindrical reach a uniform external dimension to the insulating sheath 5 while the suitable wire guide maintains a constant concentricity of the metal core 2 and the die, therefore, a constant concentricity of the metal core 2 in the insulating sheath 5.
  • a high pressure of the extrusion of the sheath 5 is obtained by an increase in the extruder of the axial spacing between the wire guide and the die and an increase in the length of the cylindrical surface of the die with respect to the usual corresponding values thereof for a usual extrusion of known cable sheaths.
  • This dimensional increase allows easy entry of the insulating material onto the metal core 2 without disturbing the operation of the extruder.
  • the neutral carrying conductor 1 produced according to the method of the invention comprises an insulating sheath 5 having excellent resistance to sliding on its metallic core 2 making it capable of correctly playing the role of a good carrying conductor for a bundle of electrical conductors, this insulating sheath 5 being easily detachable from this metallic core 2 for a bypass connection for example.
  • a neutral carrier conductor 1 produced according to the first embodiment of the invention having an outer sheath 5 and a metal core 2 having an oval cross section whose major axis is equal to 9.45 millimeters and the small axis measures 9.2 millimeters
  • a tensile force greater than 270 Newtons is required to move this insulating sheath 5 on the metallic core 2.
  • a neutral carrying conductor 1 comprises a metallic core 2 constituted by metallic wires 3 wired in strand or cord, a non-sticky separator 4 constituted by a layer of paper for example, and an insulating outer sheath 5.
  • the metal wires 3 of the core 2 consist of metal or metal alloy wires whose mechanical strength and electrical conductivity correspond to the installation and operating requirements requested.
  • the metallic core 2 comprises a circular or non-circular cross section, and the metallic wires 3 constituting it individually have a bare metal surface condition, devoid of any trace of lubricant.
  • the separator 4 intimately follows the reliefs and the hollows of the twisted profile of the metallic core 2 and the external insulating sheath 5 tightening the separator 4 against this metallic core 2, penetrates into the crevices of the surface unevenness of this soul 2.
  • this conductor 1 has good resistance to sliding of its outer insulating sheath 5 on its metallic core 2.
  • At least one more or less flexible non-slip element 16 with a high coefficient of friction and not sticking to a metal surface is formed in the conductor 1, along the latter, between the metallic core 2 and the separator 4, with a view to further greatly increasing this sliding resistance of its outer insulating sheath 5 on this metallic core 2.
  • This flexible non-slip element 16 penetrates, by its internal face into the surface crevices of the metallic core 2 and by its external face into the surface unevenness of the separator 4, and clings to it so that the external insulating sheath 5, by its tightening on the separator 4 against this metallic core 2, and by its internal surface which marries the slightest surface inequalities of this separator 4 and this metallic core 2, has a high resistance to any force tending to slide it on the metallic core 2, while allowing easy detachment of these non-slip elements 16 - separator 4 - sheath 5 without leaving sticky residue on this metallic core 2 during a stripping operation of the conductor 1.
  • the non-slip element 16 placed non-stretched comprises a support made of natural or synthetic fibers arranged in the form of a ribbon, the faces of which are coated with a layer of a more or less flexible material. with a high coefficient of friction not sticky to a metal surface, and having a permanent deformation of its faces under the effect of the heat and the pressure of the insulating outer sheath 5 during the extrusion thereof on the core metallic 2 of the conductor 1.
  • the material constituting the non-slip element 16 is a non-corrosive material for the metallic core 2, the separator 4 and the outer sheath 5 of the conductor 1.
  • Fibers constituting a support in the form of a woven or braided or non-braided ribbon of an anti-slip element 16 are for example natural or synthetic fibers such as wool, cotton, linen, silk, cellulose acetate, polyvinyl chloride, polypropylene, polyamide, polyester, polyethylene terephthalate, etc.
  • a material constituting a coating of the support of the non-slip element 16 in the form of a ribbon is for example a material based on or a derivative of polyvinyl alcohols, starch, animal proteins, vegetable proteins, phenoplasts, aminoplast resins, etc.
  • the non-slip element 16 is devoid of any support made of natural or synthetic fibers.
  • This non-slip element 16 consists of a single layer of a more or less flexible material, identical to that described in the second example illustrated in FIG. 5, deposited between the metallic core 2 and the separator 4, along the conductor 1 The deposition of this layer of material can be carried out according to a known coating, soaking or spraying technique.
  • a comparison of the measurement results recalled above shows that the conductors produced according to the second example have, compared to the conductors produced according to the first example, an increase in the sliding resistance of the sheath 5 on the metallic core 2 by a value ranging from 70 to 200 newtons.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulated Conductors (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
EP83401789A 1982-09-24 1983-09-13 Tragender Nulleiter für elektrische Leiterbündel Verfahren zum Herstellen und Verarbeitungsmittel Withdrawn EP0107530A3 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR8216155 1982-09-24
FR8216155A FR2533744A1 (fr) 1982-09-24 1982-09-24 Conducteur neutre porteur pour faisceau de conducteurs electriques, procede de fabrication, et moyens de mise en oeuvre
FR8308823 1983-05-27
FR8308823A FR2546658B2 (fr) 1983-05-27 1983-05-27 Conducteur neutre porteur pour faisceau de conducteurs electriques

Publications (2)

Publication Number Publication Date
EP0107530A2 true EP0107530A2 (de) 1984-05-02
EP0107530A3 EP0107530A3 (de) 1984-07-25

Family

ID=26223078

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83401789A Withdrawn EP0107530A3 (de) 1982-09-24 1983-09-13 Tragender Nulleiter für elektrische Leiterbündel Verfahren zum Herstellen und Verarbeitungsmittel

Country Status (2)

Country Link
EP (1) EP0107530A3 (de)
OA (1) OA07543A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110681046A (zh) * 2018-07-06 2020-01-14 索林Crm联合股份公司 用于连接隔离微导体的连接方法
CN116732798A (zh) * 2023-06-01 2023-09-12 江苏亘联科技有限公司 框篮式捻股设备

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1232628B (de) * 1961-02-10 1967-01-19 Comp Generale Electricite Elektrisches Kabel mit einer Armierung aus Metalldraehten
FR1299075A (fr) * 1961-06-08 1962-07-20 Prec Mecanique Labinal Perfectionnements apportés aux conducteurs électriques
FR2174663A1 (en) * 1972-03-06 1973-10-19 Cables De Lyon Geoffroy Delore Electric cable insulation - with a polyolefin sleeve between the metal conductors and reagents in the surrounding insulati
DE2431669A1 (de) * 1974-07-02 1976-01-29 Monette Kabel & Elektro Isolierter leiter
DE2733782C2 (de) * 1977-07-27 1983-03-24 Philips Kommunikations Industrie AG, 8500 Nürnberg Zugfestes elektrisches Kabel mit Kabelseele, Innenmantel und tragenden Bewehrungselementen
US4210012A (en) * 1979-02-21 1980-07-01 Aluminum Company Of America Roll compacting of stranded conductor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110681046A (zh) * 2018-07-06 2020-01-14 索林Crm联合股份公司 用于连接隔离微导体的连接方法
CN110681046B (zh) * 2018-07-06 2023-06-23 索林Crm联合股份公司 用于连接隔离微导体的连接方法
CN116732798A (zh) * 2023-06-01 2023-09-12 江苏亘联科技有限公司 框篮式捻股设备

Also Published As

Publication number Publication date
OA07543A (fr) 1985-03-31
EP0107530A3 (de) 1984-07-25

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Inventor name: KOWALSKI, REMY