EP1343178A1 - Electrical cable - Google Patents

Electrical cable Download PDF

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Publication number
EP1343178A1
EP1343178A1 EP02290563A EP02290563A EP1343178A1 EP 1343178 A1 EP1343178 A1 EP 1343178A1 EP 02290563 A EP02290563 A EP 02290563A EP 02290563 A EP02290563 A EP 02290563A EP 1343178 A1 EP1343178 A1 EP 1343178A1
Authority
EP
European Patent Office
Prior art keywords
central element
core
electrical cable
cable
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.)
Granted
Application number
EP02290563A
Other languages
German (de)
French (fr)
Other versions
EP1343178B1 (en
Inventor
Uwe Dr. Rudorf
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.)
Nexans SA
Original Assignee
Nexans SA
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 Nexans SA filed Critical Nexans SA
Priority to DE50201094T priority Critical patent/DE50201094D1/en
Priority to EP02290563A priority patent/EP1343178B1/en
Priority to ES02290563T priority patent/ES2225734T3/en
Priority to AT02290563T priority patent/ATE277412T1/en
Publication of EP1343178A1 publication Critical patent/EP1343178A1/en
Application granted granted Critical
Publication of EP1343178B1 publication Critical patent/EP1343178B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/1895—Internal space filling-up means
    • 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
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/1875—Multi-layer sheaths
    • H01B7/1885—Inter-layer adherence preventing means

Definitions

  • the invention relates to an electrical cable according to the preamble of claim 1.
  • cables are required that can withstand high mechanical loads.
  • the present invention has for its object to provide an electrical cable that gives the individual wires freedom of movement both in the longitudinal direction and in the radial direction, and thus the cable of everything but the wires that form the electrical circuit gives a higher tear resistance.
  • the cable should also be flexible.
  • the main advantage of the invention is the fact that the compressible central element allows the insulated conductors to deflect inwards in the radial direction when subjected to tensile loads.
  • the extremely short lay length of the electrically insulated conductors and the dummy elements results in an excess length of the stranding elements.
  • Both the compressible central element and the extremely short lay length of the stranding elements increase the tear resistance of the wires considerably.
  • the wrapping of the cable core with a film of lubricious plastic ensures that the cable core and the jacket are decoupled from one another by force, so that the cable core can move in the event of the cable being laid in concrete or asphalt relative to the cable jacket, which is then fixed.
  • the electrical cable shown in section has a central element 1, which consists of a compressible core 1a and a plastic winding 1b.
  • a tensile core can be provided in a manner not shown, which has an outer layer made of a compressible material. It is essential that the central element 1 is able to withstand the forces occurring during the stranding.
  • the blind elements 3 are, for example, strands of polypropylene, polyethylene, polyamide or other suitable plastics.
  • the central element 1, the cores 2 and the blind elements 3 preferably have the same diameter, so that in the illustrated embodiment 1 + 6 there is an optimal arrangement of the stranding elements.
  • the lay length of the stranding elements should be as short as possible and less than 10 D, preferably less than 8 D.
  • D is the outer diameter of the cable core consisting of central element 1 and the stranding elements.
  • the cable core is provided with a winding 4, which consists of a plastic film with good sliding properties.
  • a film made of polytetrafluoroethylene is particularly advantageous.
  • the plastic film can be applied as wrapping or in a longitudinal direction.
  • the wrapping 4 is surrounded by an extruded plastic jacket 5, which can be made of polyethylene, polyamide or polyurethane, for example.
  • the cable according to the invention is extremely flexible and can absorb high longitudinal forces without the wires 2 tearing. In the event of an external force, the wires 2 can deflect inwards in the radial direction, since the central element 1 is compressible.
  • the cable core can slide almost unhindered in the jacket 5 in both the longitudinal and circumferential directions. This is particularly advantageous if the cable sheath z. B. is fixed in a layer of concrete or asphalt and the cable is subjected to a tensile load.
  • the cable according to the teaching of the invention is distinguished by a low weight and low production costs.

Abstract

The cable has a cable core (1-3) with one or more insulated conductors and a sheath (5) enclosing the core. The core has a central element (1) of compressible material, at least two insulated wires (2) and one or more dummy elements (3) arranged with the insulated wires about the central element with a short length of twist of less than 10 D, whereby D is the core diameter. The core is wound with sliding material (4).

Description

Die Erfindung betrifft ein elektrisches Kabel nach dem Oberbegriff des Anspruchs 1.The invention relates to an electrical cable according to the preamble of claim 1.

In der Robotertechnik werden elektrische Kabel benötigt, die hochflexibel sind, um den ständigen Hin- und Herbewegungen der Roboterarme standhalten zu können.In robot technology, electrical cables that are highly flexible are required to withstand the constant back and forth movements of the robot arms.

Für die Beleuchtung von Flugplätzen und anderen befestigten Flächen werden Kabel benötigt, die hohe mechanische Belastungen aushallen.For the lighting of airfields and other paved areas, cables are required that can withstand high mechanical loads.

Für die Spannungsversorgung der Leuchtmittel der Flugplatzbefeuerung ist es bekannt, zwei Einzeladern, d. h. zwei isolierte elektrische Leiter in einen Schlitz im Beton oder Asphalt einzulegen. Der mit den Einzeladern belegte Schlitz wird anschließend mit einem Zwei-Komponenten-Beton oder mit Teer ausgegossen. Bei starken Belastungen kann sich der Beton oder der Asphalt verbiegen, so daß dann die in dem Teer eingegossenen Einzel-Adern reißen.For the voltage supply of the illuminants of the aerodrome lighting, it is known to use two single wires, i. H. insert two insulated electrical conductors into a slot in the concrete or asphalt. The slot covered with the single wires is then poured with a two-component concrete or with tar. With heavy loads, the concrete or the asphalt can bend, so that the individual veins cast in the tar then tear.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein elektrisches Kabel bereitzustellen, welches den einzelnen Adern Bewegungsfreiraum sowohl in Längsrichtung als auch in radialer Richtung gibt, und damit dem Kabel von allem jedoch den Adern, die den elektrischen Stromkreis bilden eine höhere Reißfestigkeit verleiht. Darüberhinaus soll das Kabel flexibel sein.The present invention has for its object to provide an electrical cable that gives the individual wires freedom of movement both in the longitudinal direction and in the radial direction, and thus the cable of everything but the wires that form the electrical circuit gives a higher tear resistance. The cable should also be flexible.

Diese Aufgabe wird durch die im Kennzeichen des Anspruchs 1 erfaßten Merkmale gelöst.This object is achieved by the features recorded in the characterizing part of claim 1.

Der wesentliche Vorteil der Erfindung ist darin zu sehen, daß durch das kompressible zentrale Element die isolierten Leiter bei Zugbelastung in radialer Richtung nach innen ausweichen können. Durch die extrem kurze Schlaglänge der elektrisch isolierten Leiter und der Blindelemente ergibt sich eine Überlange der Verseilelemente. Sowohl das kompressible Zentralelement als auch die extrem kurze Schlaglänge der Verseilelemente erhöhen die Reißfestigkeit der Adern erheblich. Die Bewicklung der Kabelseele mit einer Folie aus gleitfähigem Kunststoff gewährleistet, daß die Kabelseele und der Mantel kräftemäßig voneinander entkoppelt sind, so daß sich die Kabelseele im Falle der Verlegung des Kabels im Beton oder Asphalt gegenüber dem Kabelmantel, der dann fixiert ist, bewegen kann.The main advantage of the invention is the fact that the compressible central element allows the insulated conductors to deflect inwards in the radial direction when subjected to tensile loads. The extremely short lay length of the electrically insulated conductors and the dummy elements results in an excess length of the stranding elements. Both the compressible central element and the extremely short lay length of the stranding elements increase the tear resistance of the wires considerably. The wrapping of the cable core with a film of lubricious plastic ensures that the cable core and the jacket are decoupled from one another by force, so that the cable core can move in the event of the cable being laid in concrete or asphalt relative to the cable jacket, which is then fixed.

Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen erfaßt.Further advantageous embodiments of the invention are covered in the subclaims.

Ein Ausführungsbeispiel der Erfindung ist anhand des in der Figur schematisch dargestellten Schnittes durch ein Kabel näher beschrieben.An embodiment of the invention is described in more detail with reference to the section through a cable shown schematically in the figure.

Das im Schnitt dargestellte elektrische Kabel weist ein Zentralelement 1 auf, welches aus einem kompressiblen Kern 1a sowie einer Kunststoffbewicklung 1b besteht. Alternativ kann auch in nicht dargestellter Weise ein zugfester Kern vorgesehen sein, welcher eine äußere Schicht aus einem kompressiblen Werkstoff aufweist. Wesentlich ist, daß das Zentralelement 1 den bei der Verseilung auftretenden Kräften gewachsen ist.The electrical cable shown in section has a central element 1, which consists of a compressible core 1a and a plastic winding 1b. Alternatively, a tensile core can be provided in a manner not shown, which has an outer layer made of a compressible material. It is essential that the central element 1 is able to withstand the forces occurring during the stranding.

Zwei Adern 2, die jede aus einem elektrischen Leiter 2a und einer Isolierschicht 2b besteht, sind gemeinsam mit vier Blindelementen 3 auf das Zentralelement 1 aufgeseilt. Die Blindelemente 3 sind beispielsweise Stränge aus Polypropylen, Polyefhylen, Polyamid oder anderen geeigneten Kunststoffen. Das Zentralelement 1, die Adern 2 sowie die Blindelemente 3 haben vorzugsweise den gleichen Durchmesser, so daß sich bei der dargestellten Ausführung 1 + 6 eine optimale Anordnung der Verseilelemente ergibt.Two wires 2, each consisting of an electrical conductor 2a and an insulating layer 2b, are roped together with four blind elements 3 onto the central element 1. The blind elements 3 are, for example, strands of polypropylene, polyethylene, polyamide or other suitable plastics. The central element 1, the cores 2 and the blind elements 3 preferably have the same diameter, so that in the illustrated embodiment 1 + 6 there is an optimal arrangement of the stranding elements.

Die Schlaglänge der Verseilelemente (Adern 2 und Blindelemente 3) sollte möglichst kurz sein und weniger als 10 D vorzugsweise weniger als 8 D betragen. D ist der Außendurchmesser der aus Zentralelement 1 und den Verseilelementen bestehenden Kabelseele.The lay length of the stranding elements (wires 2 and dummy elements 3) should be as short as possible and less than 10 D, preferably less than 8 D. D is the outer diameter of the cable core consisting of central element 1 and the stranding elements.

Die Kabelseele ist mit einer Bewicklung 4 versehen, die aus einer Kunststoffolie mit guten Gleiteigenschaften besteht. Besonders vorteilhaft ist eine Folie aus Polytetrafluorethylen. Die Kunststoffolie kann als Bewicklung oder aber längseinlaufend aufgebracht sein.The cable core is provided with a winding 4, which consists of a plastic film with good sliding properties. A film made of polytetrafluoroethylene is particularly advantageous. The plastic film can be applied as wrapping or in a longitudinal direction.

Die Bewicklung 4 ist von einem extrudierten Kunststoffmantel 5 umgeben, der beispielsweise aus Polyethylen, Polyamid oder Polyurethan bestehen kann.The wrapping 4 is surrounded by an extruded plastic jacket 5, which can be made of polyethylene, polyamide or polyurethane, for example.

Das erfindungsgemäße Kabel ist äußerst flexibel und kann hohe Längskräfte aufnehmen, ohne daß die Adern 2 reißen. Im Falle einer äußeren Krafteinwirkung können die Adern 2 in radialer Richtung nach innen ausweichen, da das Zentralelement 1 kompressibel ist.The cable according to the invention is extremely flexible and can absorb high longitudinal forces without the wires 2 tearing. In the event of an external force, the wires 2 can deflect inwards in the radial direction, since the central element 1 is compressible.

Aufgrund der Bewicklung 3 kann die Kabelseele nahezu ungehindert in dem Mantel 5 sowohl in Längs- als auch in Umfangsrichtung gleiten. Dies ist dann von besonderem Vorteil, wenn der Kabelmantel z. B. in einer Schicht aus Beton oder Asphalt festgelegt ist und das Kabel einer Zugbelastung ausgesetzt wird.Due to the winding 3, the cable core can slide almost unhindered in the jacket 5 in both the longitudinal and circumferential directions. This is particularly advantageous if the cable sheath z. B. is fixed in a layer of concrete or asphalt and the cable is subjected to a tensile load.

Das Kabel gemäß der Lehre der Erfindung zeichnet sich neben den oben bereits erwähnten Vorteilen durch ein geringes Gewicht und niedrige Fertigungskosten aus.In addition to the advantages already mentioned above, the cable according to the teaching of the invention is distinguished by a low weight and low production costs.

Claims (6)

Elektrisches Kabel mit einer ein oder mehrere isolierte Leiter aufweisenden Kabelseele sowie einem die Kabelseele umhüllenden Mantel, dadurch gekennzeichnet, daß die Kabelseele ein zentrales Element (1) aus einem kompressiblen Material, zumindest zwei isolierte Adern (2) sowie ein oder mehrere Blindelemente (3) aufweist, daß die isolierten Adern (2) und die Blindelemente (3) um das zentrale Element (1) mit einer kurzen Schlaglänge von weniger als 10 D herumgeseilt sind, wobei D der Durchmesser der Kabelseele ist und daß die Kabelseele (1,2,3) mit einer Bewicklung (4) aus gleitfähigem Werkstoff versehen ist.Electrical cable with a cable core having one or more insulated conductors and a sheath enveloping the cable core, characterized in that the cable core has a central element (1) made of a compressible material, at least two insulated wires (2) and one or more blind elements (3) has that the insulated wires (2) and the dummy elements (3) are roped around the central element (1) with a short lay length of less than 10 D, D being the diameter of the cable core and that the cable core (1,2, 3) is provided with a winding (4) made of slidable material. Elektrisches Kabel nach Anspruch 1, dadurch gekennzeichnet, daß das zentrale Element (1) aus einem kompressiblen Kern (1a) und einer elastisch verformbaren Umhüllung (1b) besteht.Electrical cable according to claim 1, characterized in that the central element (1) consists of a compressible core (1a) and an elastically deformable sheath (1b). Elektrisches Kabel nach Anspruch 2, dadurch gekennzeichnet, daß das zentrale Element (1) eine Kordel (1a) aus Baumwolle ist, die mit einer Umwicklung (1b) aus einem Kunststoffband versehen ist.Electrical cable according to claim 2, characterized in that the central element (1) is a cord (1a) made of cotton, which is provided with a wrapping (1b) made of a plastic band. Elektrisches Kabel nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Adern (2), das zentrale Element (1) sowie die Blindelemente (3) den gleichen Außendurchmesser aufweisen.Electrical cable according to one of claims 1 to 3, characterized in that the wires (2), the central element (1) and the blind elements (3) have the same outer diameter. Elektrisches Kabel nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Bewicklung (4) aus einer Folie aus Polytetrafluorethylen oder einem ähnlichen Werkstoff besteht.Electrical cable according to one of claims 1 to 4, characterized in that the winding (4) consists of a film made of polytetrafluoroethylene or a similar material. Elektrisches Kabel nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Mantel (5) ein extrudierter Mantel aus thermoplastischem oder vernetztem Kunststoff oder Gummi ist.Electrical cable according to one of claims 1 to 5, characterized in that the sheath (5) is an extruded sheath made of thermoplastic or cross-linked plastic or rubber.
EP02290563A 2002-03-06 2002-03-06 Electrical cable Expired - Lifetime EP1343178B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE50201094T DE50201094D1 (en) 2002-03-06 2002-03-06 Electric cable
EP02290563A EP1343178B1 (en) 2002-03-06 2002-03-06 Electrical cable
ES02290563T ES2225734T3 (en) 2002-03-06 2002-03-06 ELECTRIC CABLE.
AT02290563T ATE277412T1 (en) 2002-03-06 2002-03-06 ELECTRICAL CABLE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02290563A EP1343178B1 (en) 2002-03-06 2002-03-06 Electrical cable

Publications (2)

Publication Number Publication Date
EP1343178A1 true EP1343178A1 (en) 2003-09-10
EP1343178B1 EP1343178B1 (en) 2004-09-22

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Family Applications (1)

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EP02290563A Expired - Lifetime EP1343178B1 (en) 2002-03-06 2002-03-06 Electrical cable

Country Status (4)

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EP (1) EP1343178B1 (en)
AT (1) ATE277412T1 (en)
DE (1) DE50201094D1 (en)
ES (1) ES2225734T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105070358A (en) * 2015-08-14 2015-11-18 昆山信昌电线电缆有限公司 High flexibility wear resisting flame retardation industrial chain cable

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3144743A1 (en) * 1981-11-11 1983-05-19 U.I. Lapp Kg, 7000 Stuttgart Electric, flexible line with particular resistance to torsional stress
US5313020A (en) * 1992-05-29 1994-05-17 Western Atlas International, Inc. Electrical cable

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3144743A1 (en) * 1981-11-11 1983-05-19 U.I. Lapp Kg, 7000 Stuttgart Electric, flexible line with particular resistance to torsional stress
US5313020A (en) * 1992-05-29 1994-05-17 Western Atlas International, Inc. Electrical cable

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105070358A (en) * 2015-08-14 2015-11-18 昆山信昌电线电缆有限公司 High flexibility wear resisting flame retardation industrial chain cable

Also Published As

Publication number Publication date
EP1343178B1 (en) 2004-09-22
DE50201094D1 (en) 2004-10-28
ES2225734T3 (en) 2005-03-16
ATE277412T1 (en) 2004-10-15

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