EP2785968B1 - Procédé de fabrication de l'âme d'un câble, comprenant un conducteur entouré par un joint isolant, destiné à un câble, en particulier à un câble à induction, âme de câble et câble - Google Patents

Procédé de fabrication de l'âme d'un câble, comprenant un conducteur entouré par un joint isolant, destiné à un câble, en particulier à un câble à induction, âme de câble et câble Download PDF

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Publication number
EP2785968B1
EP2785968B1 EP12815990.2A EP12815990A EP2785968B1 EP 2785968 B1 EP2785968 B1 EP 2785968B1 EP 12815990 A EP12815990 A EP 12815990A EP 2785968 B1 EP2785968 B1 EP 2785968B1
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EP
European Patent Office
Prior art keywords
cable
connector
core
wire ends
cable core
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.)
Active
Application number
EP12815990.2A
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German (de)
English (en)
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EP2785968A1 (fr
Inventor
Jens MOSEBACH
Michael Dreiner
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.)
Leoni Kabel GmbH
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Leoni Kabel Holding GmbH
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Publication date
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Publication of EP2785968A1 publication Critical patent/EP2785968A1/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
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
    • E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
    • E21B43/2401—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection by means of electricity
    • 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
    • H01B7/0009—Details relating to the conductive cores
    • 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
    • H05B2214/00—Aspects relating to resistive heating, induction heating and heating using microwaves, covered by groups H05B3/00, H05B6/00
    • H05B2214/03—Heating of hydrocarbons
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y10T29/49174—Assembling terminal to elongated conductor

Definitions

  • the invention relates to a method for producing a cable core with a conductor surrounded by an insulation for a cable, in particular for an induction cable.
  • the invention further relates to such a cable core and a cable, in particular an induction cable with a plurality of such cable cores.
  • the cable cores each have a conductor surrounded by an insulation and are interrupted in the cable longitudinal direction at predetermined length positions at separation points.
  • Such a cable is used in particular for use as a so-called induction cable for forming one or more induction fields.
  • the cable is intended in particular for inductive heating of oil sands and / or heavy oil deposits.
  • Such an application of such an induction cable is for example from the EP 2 250 858 B1 refer to. The technical boundary conditions resulting from this application are fulfilled by the cable described below.
  • the individual wires of the cable are separated at defined separation points in a grid with a defined length of for example several 10 m.
  • a plurality of wires are preferably combined into conductor groups, wherein the separation points or interruptions of the wires of a respective conductor group is located at the same length position.
  • Such a cable is laid in the ground (oil sands) and is used for inductive heating of the oil sand, in order to liquefy the oil bound in the oil sand and suitably catch.
  • a device for "in situ" promotion of bitumen or heavy oil from oil sands deposits described as a reservoir, wherein at least one electrical / electromagnetic heating is provided to reduce the viscosity of the bitumen or heavy oil.
  • At a given depth of the reservoir at least two linearly extended conductors are guided in parallel in a horizontal orientation and the ends of the conductors are electrically conductively connected inside or outside the reservoirs. Together, the conductors form a conductor loop that realizes a given complex resistance. Outside the reservoir, the conductors are connected to an external AC generator for electrical power, the inductance of the conductor loop being partially compensated.
  • the present invention has the object to enable a process-technically safe and reliable production of such a cable and specify a corresponding cable.
  • the object is achieved according to the invention by a method for manufacturing a cable core having the features of claim 1.
  • the cable core comprises a conductor surrounded by an insulation and is designed for use in an induction cable.
  • the cable core is interrupted in the cable longitudinal direction at predetermined length positions at separation points.
  • a raw core is first fed continuously, ie in a continuous process, to a processing machine.
  • the raw wire is in the processing machine recurring, especially regularly at predetermined length positions, separated at a respective separation point, so that there are two wire ends.
  • the free wire ends are gripped by a gripping element of the processing machine and pulled apart in the cable longitudinal direction.
  • the connector has an insulating, in particular made of a solid material intermediate piece, which is arranged between the two wire ends and these separated by a predetermined distance from each other.
  • This refinement enables a process-reliable and automated production method for such a cable core. From the thus prepared cable cores, the actual cable is produced in a subsequent process step.
  • an encapsulation of the wire ends to form the connector is provided.
  • an injection mold is provided as part of the processing machine, which encloses the two separate wire ends at the separation point during the continuous process.
  • the injection molding compound is injected from a suitable plastic insulating material, so that the connector is formed with the insulating intermediate piece between the wire ends and with the wire ends surrounding sleeve sections.
  • the wire ends are enclosed tightly enclosed within the connector, in particular airtight and moreover also evacuated.
  • the wire ends are therefore embedded within the material of the connector completely and without gas inclusions. This is achieved in a particularly simple manner by the preferred spraying method.
  • a connector which is preferably likewise embodied as an injection molded part, is fed to the processing machine as a prefabricated component, and the wire ends are introduced into opposite sleeve sections of the connector, and then these sleeve sections are connected to the wire ends.
  • this is preferably materially connected to the material of the connector. This is done in particular by a heat treatment and the use of suitable materials which at least soften or partially melt when heated.
  • a thermoplastic material is preferably used as a material for both the connector and for the at least outermost layer of the insulation of the cable core.
  • a similar and in particular a same material used is in particular a high-temperature-resistant plastic, preferably PFA (perfluoroalkoxy polymer).
  • the connector and at least adjacent sections of the wire, preferably the entire wire, are surrounded with a banding, in particular made of PTFE (polytetrofluoroethylene).
  • a banding in particular made of PTFE (polytetrofluoroethylene).
  • PTFE polytetrofluoroethylene
  • This is preferably in turn subjected to a temperature treatment, in particular a sintering process, in order to connect them as materially as possible to the insulation of the wire and the connector.
  • a torsion-resistant cable core is generated in total, which is electrically interrupted at defined separation points.
  • the respective wire ends are coupled to each other via the respective connector with the release of the insulating intermediate piece, whereby a window is virtually formed. Due to the melting of the wire ends in the sleeve, in particular also in connection with the PTFE lining, a high tensile strength, in particular in the area of the connector, is achieved in addition to the high torsional rigidity.
  • the production of the cable core takes place in the course of a rewinding operation.
  • the Rohader is hereby provided on a supply reel as an endless product and unwound from this, passed through the processing machine and then rolled up again after attaching the individual connectors of a take-up reel.
  • the cable core is subjected to an online quality control in an appropriate further development, i. the quality of the connections at the separation points is continuously checked.
  • an electrical check of the connectors is made.
  • a mechanical (tensile) testing device is integrated into the process chain.
  • a mechanical (tensile) testing device is integrated into the process chain.
  • Integrated processing units in the process chain such as an additional welding unit or a Bandierü.
  • an additional tempering unit is arranged in particular for the thermal treatment (sintering process) of the applied banding.
  • the individual cable cores are then used to produce the actual cable. This has at the end of several such cable cores, which are surrounded by a common cable sheath.
  • the individual cable cores are preferably optionally stranded together several times.
  • the individual cable cores are positioned relative to each other in such a way that the individual separation points of at least one group of cable cores are arranged at the same length position.
  • Several groups of cable cores can be provided (for example 2 or 3) whose separation points are each oriented at the same length position, wherein the separation points of the cable cores of different groups are arranged offset to one another.
  • the distance between the connectors and thus the separation points is typically several meters, especially several tens of meters.
  • the separation points are arranged in a predetermined, in particular constant grid.
  • the cable expediently comprises several stranded elements, which consist on the one hand of several stranded together cable cores and in turn are stranded together.
  • the cable thus produced has a length of typically at least several 100m to several km.
  • it is altogether high temperature resistant formed for a temperature greater than 200 ° C. Accordingly, the materials used are designed for such a high temperature.
  • the object is further achieved according to the invention by a cable core having the features of claim 8 and by a cable having the features of claim 15.
  • the advantages and preferred embodiments cited with regard to the manufacturing method are analogous to the cable core and the cable transferable.
  • a cable core 2 which extends in the cable longitudinal direction 4, and at periodically recurring separation points 6 each have a connector 8.
  • the separation points 6 are formed in a predetermined pitch a.
  • the cable core 2 comprises a central electrical conductor 10, which is surrounded by an insulation 12.
  • the insulation 10 is preferably a multi-layer insulation 12 made of different insulating materials, which are each resistant to high temperatures.
  • the insulation consists of only one insulating layer, preferably of PFA.
  • the insulation 12 consists of two layers, preferably one layer of PFA and another of a PTFE, which is applied in particular as banding.
  • three layers are provided, wherein preferably a PTFE tape is sandwiched between two PFA insulation layers.
  • a total of four-layer construction is provided, in which, in a preferred embodiment, two intermediate layers are embedded between two PFA coatings.
  • the two intermediate layers are preferably a banded PTFE and a banded mica.
  • a wire in particular a copper wire and preferably a nickel-plated copper wire is used.
  • a stranded wire for example, a copper or a nickel-plated copper stranded wire consisting of a plurality of individual wires can be used.
  • the cable core 2 is formed from a Rohader 14 consisting of the conductor 10 and the insulation 12, the cable core 2 is formed.
  • the green core 14 is interrupted at the separation points 6, so that two opposite wire ends 16 are formed. These are connected to each other via the connector 8.
  • the connector 8 enters into a cohesive connection with the insulation 12 of the wire ends 16.
  • the connector 8 is formed in both cases by a solid intermediate piece 20, to which in each case opposite sleeve sections 22 connect, in which the wire ends 16 gas-free and gas-tight eintru.
  • Both connectors 8 are injection molded parts.
  • the material used is preferably the same material as the outermost shell of the insulation 12, in particular PFA. Due to the use of a thermoplastic, the desired cohesive connection can be achieved in a simple manner by the introduction of heat.
  • a prefabricated connector 8 is provided, into which the wire ends 16 are respectively inserted, and then the sleeve sections 22 are materially connected to the wire ends 16, for example by pressing and / or heat treatment.
  • the connector 8 has a total length of preferably several cm, for example in the range of 5 cm to 15 cm.
  • the length of the intermediate piece 20 is in the range of 5 mm to 20 mm.
  • the diameter of the green core 14 and thus approximately the inner diameter of the sleeve sections 22 is preferably approximately in the range of 1 mm to 3 mm.
  • the wall thickness of the sleeve sections 22 is preferably in the range of 0.3 mm to 1 mm.
  • the connector 8 is symmetrical.
  • the pitch a between the connectors 8 is in the range of several 10 m.
  • FIG Fig. 4 An exemplary conductor structure of an induction cable 24 is shown in FIG Fig. 4 shown.
  • the induction cable 24 then has a total of three elements 26, each formed of a plurality of stranded cable cores 2.
  • each element 26 has a central optical waveguide fiber 28, which is surrounded concentrically by a first core layer with six cable cores 2. This first core layer is then surrounded by a second core layer in the embodiment consisting of twelve individual cable cores 2. The individual core layers are produced in a stranding process.
  • a filling element 30 is arranged in particular glass fiber or aramid.
  • the first layer with the six stranded cable cores 2 can - as shown in the embodiment - be surrounded by an intermediate casing 32, for example made of silicone.
  • the three elements 26 thus constructed are in turn stranded together and then surrounded with a cable sheath 34, in particular made of silicone.
  • the elements 26 each have, for example, a diameter of about 10 mm.
  • the entire cable 24 has a diameter of, for example, about 25 mm.
  • this induction cable 24 is also suitable for other applications, eg. B. for installation in a hall floor of a production workshop for controlling industrial robots, which proceed on the hall floor. Or for heating, for example, oil-carrying pipes (pipeline).
  • the method for producing the cable core 2 is based on the Fig. 5 explained in more detail.
  • the rough core 14 is provided on a supply reel 36 and guided by this on various pulleys a machine 38 and therethrough, then passed through several partially optional further processing and monitoring stations 40 and at the end of the manufacturing process immediately from a take-up reel 42 as finished cable core 2 wound up.
  • This cable core 2 is then available for the actual manufacturing process of the cable 24 by stranding processes.
  • the production of the cable core 2 from the rough core 14 is therefore carried out in total in a continuous, ongoing process during a rewinding operation.
  • the raw core 14 is severed and subsequently bonded to the connector 8.
  • the processing machine 38 includes an injection molding tool for on-line forming the connector 8 by an injection molding process.
  • the raw core 14 is first held at the intended separation point 6 of two gripping elements, then separated, in which case the two wire ends 16 are pulled apart by a desired distance of 1 cm to 2 cm.
  • the wire ends 16 are inserted into the injection mold.
  • this preferably has two shell halves, which moves perpendicular to the cable longitudinal direction 4 to the wire ends 16 and encloses them.
  • the injection molding compound is introduced. After a certain cooling time, the injection mold opens again and the cable core 2 is continued.
  • the prefabricated connector 8 is provided here in the processing machine 38.
  • the wire ends 16 are inserted into the sleeve sections 22 with the aid of the gripping elements.
  • the cohesive bonding of the wire ends 16 within the connector 8 takes place, for example, by tempering and pressing.
  • the entire production process as described in US Pat Fig. 5 is controlled by a control unit 44, for example.

Claims (15)

  1. Procédé de fabrication d'un brin de câble (2) comprenant un conducteur entouré d'une isolation (12) pour un câble, notamment pour un câble à induction (24),
    caractérisé
    en ce qu'un brin brut (14) est mené de manière continue à une machine de traitement (38) et, de manière répétitive,
    - y est sectionné en des positions longitudinales prédéterminées, au niveau d'une zone de sectionnement (6) respective, de sorte que deux extrémités de brin (16) sont formées au niveau de la zone de sectionnement (6),
    - les extrémités de brin (16) sont espacées mutuellement par étirement dans la direction longitudinale de câble (4),
    - les deux extrémités de brin (16) sont à nouveau raccordées à l'aide d'un élément de raccordement (8), celui-ci présentant une partie intermédiaire isolante (20), qui sépare les extrémités de brin (16) d'une distance d'espacement prédéterminée.
  2. Procédé selon la revendication 1,
    caractérisé
    en ce que les extrémités de brin (16) mutuellement séparées sont surmoulées par injection pour former l'élément de raccordement (8).
  3. Procédé selon l'une des revendications précédentes,
    caractérisé
    en ce qu'en complément, un bandage (18) est appliqué sur le brin de câble (2) et l'élément de raccordement (8).
  4. Procédé selon l'une des revendications précédentes,
    caractérisé
    en ce que le sectionnement et le raccordement du brin brut (14) s'effectuent lors d'un processus de rembobinage.
  5. Procédé selon l'une des revendications précédentes,
    caractérisé
    en ce que plusieurs brins de câble (2) ainsi préparés sont regroupés par un processus de toronnage, et entourés par une enveloppe de câble (34) commune.
  6. Brin de câble (2) pour un câble s'étendant dans une direction longitudinale de câble (4), notamment pour un câble à induction (24), comprenant plusieurs brins de câble (2) de ce type, qui présentent chacun un conducteur (10) entouré d'une isolation, le brin de câble (2) respectivement considéré étant interrompu dans la direction longitudinale de câble (4) en des zones de sectionnement (6), au niveau de positions longitudinales prédéterminées, en formant à chaque fois des extrémités de brin (16),
    caractérisé
    en ce que pour assurer le raccordement des extrémités de brin (16), un élément de raccordement (8) s'étendant dans la direction longitudinale de câble (4) et comportant une partie intermédiaire isolante (20) est agencé entre lesdites extrémités, et les extrémités de brin (16) sont fixées à l'élément de raccordement (8) de part et d'autre de la partie intermédiaire (20) en se référant à la direction longitudinale de câble (4).
  7. Brin de câble (2) selon la revendication 6,
    caractérisé
    en ce que l'élément de raccordement (8) présente, de part et d'autre de la partie intermédiaire (20), respectivement un tronçon de manchon (22) s'étendant dans la direction longitudinale de câble (4), tronçons de manchon dans lesquels viennent se loger les extrémités de brin (16).
  8. Brin de câble (2) selon la revendication 6 ou la revendication 7,
    caractérisé
    en ce que l'élément de raccordement (8) est réalisé sous la forme d'une pièce de moulage par injection.
  9. Brin de câble (2) selon l'une des revendications 6 à 8,
    caractérisé
    en ce que l'élément de raccordement (8) est réalisé par surmoulage des extrémités de brin (16).
  10. Brin de câble (2) selon l'une des revendications 6 à 9,
    caractérisé
    en ce que les zones de sectionnement (6) se répètent selon une dimension modulaire (a) prédéterminée, la dimension modulaire (a) se situant dans un domaine de plusieurs mètres.
  11. Brin de câble (2) selon l'une des revendications 6 à 10,
    caractérisé
    en ce que l'isolation (12) est liée par continuité de matière avec l'élément de raccordement (8).
  12. Brin de câble (2) selon l'une des revendications 6 à 11,
    caractérisé
    en ce que l'élément de raccordement (8) ainsi que l'isolation (12) sont constitués d'un matériau similaire et notamment du même matériau.
  13. Brin de câble (2) selon l'une des revendications 6 à 12,
    caractérisé
    par un bandage périphérique (18) en une matière plastique résistant aux hautes températures, qui entoure l'élément de raccordement (8) ainsi qu'au moins des parties partielles avoisinantes du brin de câble (2).
  14. Brin de câble (2) selon l'une des revendications 6 à 13,
    caractérisé
    en ce que le bandage (18) est lié par continuité de matière avec l'élément de raccordement (8) et/ou avec l'isolation (12).
  15. Câble, notamment câble à induction (24), dans lequel plusieurs brins de câble (2) selon l'une des revendications 6 à 14 sont toronnés mutuellement et entourés par une enveloppe de câble (34).
EP12815990.2A 2011-12-02 2012-11-29 Procédé de fabrication de l'âme d'un câble, comprenant un conducteur entouré par un joint isolant, destiné à un câble, en particulier à un câble à induction, âme de câble et câble Active EP2785968B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011087680 2011-12-02
PCT/EP2012/004929 WO2013079201A1 (fr) 2011-12-02 2012-11-29 Procédé de fabrication de l'âme d'un câble, comprenant un conducteur entouré par un joint isolant, destiné à un câble, en particulier à un câble à induction, âme de câble et câble

Publications (2)

Publication Number Publication Date
EP2785968A1 EP2785968A1 (fr) 2014-10-08
EP2785968B1 true EP2785968B1 (fr) 2016-05-04

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Application Number Title Priority Date Filing Date
EP12815990.2A Active EP2785968B1 (fr) 2011-12-02 2012-11-29 Procédé de fabrication de l'âme d'un câble, comprenant un conducteur entouré par un joint isolant, destiné à un câble, en particulier à un câble à induction, âme de câble et câble

Country Status (7)

Country Link
US (1) US10219326B2 (fr)
EP (1) EP2785968B1 (fr)
CN (1) CN103987916B (fr)
CA (1) CA2857698C (fr)
EA (1) EA025554B1 (fr)
ES (1) ES2585106T3 (fr)
WO (1) WO2013079201A1 (fr)

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US8607862B2 (en) 2008-05-05 2013-12-17 Siemens Aktiengesellschaft Method and device for in-situ conveying of bitumen or very heavy oil
FR2947587A1 (fr) 2009-07-03 2011-01-07 Total Sa Procede d'extraction d'hydrocarbures par chauffage electromagnetique d'une formation souterraine in situ

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Publication number Priority date Publication date Assignee Title
WO2021021037A1 (fr) 2019-07-30 2021-02-04 Üntel Kablolari Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ Système de production de câble

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CN103987916A (zh) 2014-08-13
WO2013079201A1 (fr) 2013-06-06
CA2857698A1 (fr) 2013-06-06
ES2585106T3 (es) 2016-10-03
CA2857698C (fr) 2019-10-15
US20140263289A1 (en) 2014-09-18
US10219326B2 (en) 2019-02-26
EA025554B1 (ru) 2017-01-30
EA201491076A1 (ru) 2014-09-30
CN103987916B (zh) 2017-01-18
EP2785968A1 (fr) 2014-10-08

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