EP0778634A1 - Strahlendes Kabel mit Feuerbeständigkeit - Google Patents

Strahlendes Kabel mit Feuerbeständigkeit Download PDF

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Publication number
EP0778634A1
EP0778634A1 EP96402558A EP96402558A EP0778634A1 EP 0778634 A1 EP0778634 A1 EP 0778634A1 EP 96402558 A EP96402558 A EP 96402558A EP 96402558 A EP96402558 A EP 96402558A EP 0778634 A1 EP0778634 A1 EP 0778634A1
Authority
EP
European Patent Office
Prior art keywords
conductor
external conductor
layer
thermal protection
cable
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Withdrawn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
EP96402558A
Other languages
English (en)
French (fr)
Inventor
Claire Guery
Philippe Cheron
Jean Gombert
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.)
Sagem SA
Original Assignee
Societe Anonyme de Telecommunications SAT
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 Societe Anonyme de Telecommunications SAT filed Critical Societe Anonyme de Telecommunications SAT
Publication of EP0778634A1 publication Critical patent/EP0778634A1/de
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/20—Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/203—Leaky coaxial lines

Definitions

  • the present invention relates to a radiating cable having fire resistance.
  • a radiating cable generally comprises an internal conductor, a dielectric layer usually made of non-halogenated and non-crosslinked cellular foam, and an external conductor surrounding the dielectric layer and comprising openings.
  • a thermal protection layer in particular by winding around it a mineral ribbon, for example made of mica, which has the advantage of being easily installed, inert with respect to mold and insensitive to vibrations and which retains the flexibility of the cable.
  • the mineral ribbon is especially useful for cables comprising a non-halogenated dielectric material, the mineral ribbon having the function of maintaining the dielectric layer around the conductor even when it is charred, and of preventing premature oxidation of the dielectric, thus ensuring a complementary function of improving the resistance to flame propagation.
  • a radiating cable of the aforementioned type is proposed in which an intermediate layer of plastic material is disposed between the external conductor and the thermal protection layer.
  • a mattress is produced between the external conductor and the thermal protection layer which prevents deterioration of the thermal protection layer by the external conductor and which by deformation is anchored both with the external conductor and with the thermal protection layer and keeps the thermal protection layer in place and ensures its integrity during a significant rise in temperature.
  • the intermediate layer is made of crosslinked material. It has in fact been found that the structure according to the invention, the fire resistance properties of the crosslinked material made it possible to produce the intermediate layer with a small thickness minimizing the cost of the cable and not affecting its flexibility.
  • the outer sheath is itself made of crosslinked material.
  • the radiating cable comprises an internal conductor 1, a dielectric layer 2 surrounding the internal conductor 1, and an external conductor 3 surrounding the dielectric layer 2 and having openings 4.
  • the internal conductor can be made of copper, aluminum, or made of a complex of copper and aluminum.
  • the internal conductor can be made of a solid core or with divided strands and its surface can be smooth or wavy.
  • the dielectric layer 2 is preferably made of non-halogenated and non-crosslinked cellular foam.
  • the external conductor 3 is made of copper, aluminum or a complex of aluminum and copper. In the embodiment of the figure, the external conductor is formed from a punched ribbon to make openings 4.
  • the external conductor is formed from one or more strips wound in a helix or laid lengthwise and held by welding or adhesive tape, or by extrusion.
  • the external conductor can be smooth in appearance or have radial or longitudinal undulations.
  • the openings can have various shapes, dimensions and spacings, and are produced by milling, stamping, or by a spacing between the turns during a taping.
  • the radiating cable also comprises an intermediate layer 5 disposed between the external conductor 3 and a thermal protection layer 6.
  • the thermal protection layer is produced conventionally by a ribbon or an assembly of mineral ribbons reinforced with fibers. glass or glass ribbon.
  • the intermediate layer 6 is a plastic layer which can be placed on the external conductor 3 by extrusion or by helical winding of a ribbon or an assembly of plastic ribbons.
  • the intermediate layer preferably comprises a crosslinked material, whether this crosslinking is done by means of a crosslinking agent or by electron irradiation or bombardment.
  • the cable according to the invention comprises an outer sheath 7 preferably extruded and made of crosslinked halogen-free flame retardant material.
  • thermal protection layer has been illustrated in the form of a single layer, provision may be made for it in the form of a double layer by making a cross wrapping ensuring a better seal while retaining good flexibility of the cable obtained.

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  • Insulated Conductors (AREA)
EP96402558A 1995-12-06 1996-11-27 Strahlendes Kabel mit Feuerbeständigkeit Withdrawn EP0778634A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9514407 1995-12-06
FR9514407A FR2742259B1 (fr) 1995-12-06 1995-12-06 Cable rayonnant ayant une tenue au feu

Publications (1)

Publication Number Publication Date
EP0778634A1 true EP0778634A1 (de) 1997-06-11

Family

ID=9485187

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96402558A Withdrawn EP0778634A1 (de) 1995-12-06 1996-11-27 Strahlendes Kabel mit Feuerbeständigkeit

Country Status (2)

Country Link
EP (1) EP0778634A1 (de)
FR (1) FR2742259B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2920918A1 (fr) * 2007-09-06 2009-03-13 Nexans Sa Cable rayonnant.
EP2345535A1 (de) 2010-01-18 2011-07-20 Armacell Enterprise GmbH Brandschutzsystem für expandierte Polymere
CN104377413A (zh) * 2014-11-18 2015-02-25 中天日立射频电缆有限公司 自融冰漏泄同轴电缆及其制作方法
CN110189857A (zh) * 2019-06-18 2019-08-30 海盐九里电子有限公司 一种新型割草机信号线

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986003329A1 (fr) * 1984-11-29 1986-06-05 Habia Cable Sa Revetement isolant souple resistant au feu pour conduites, fils cables electriques et fibres optiques
FR2594601A1 (fr) * 1986-02-12 1987-08-21 Hitachi Cable Cable coaxial rayonnant, notamment pour les radiocommunications dans les zones enfermees, dote de proprietes de resistance au feu
EP0428026A2 (de) * 1989-11-16 1991-05-22 Andrew A.G. Abstrahlendes Koaxialkabel mit verbesserter Wasserabschirmcharakteristik
US5422614A (en) * 1993-02-26 1995-06-06 Andrew Corporation Radiating coaxial cable for plenum applications

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986003329A1 (fr) * 1984-11-29 1986-06-05 Habia Cable Sa Revetement isolant souple resistant au feu pour conduites, fils cables electriques et fibres optiques
FR2594601A1 (fr) * 1986-02-12 1987-08-21 Hitachi Cable Cable coaxial rayonnant, notamment pour les radiocommunications dans les zones enfermees, dote de proprietes de resistance au feu
EP0428026A2 (de) * 1989-11-16 1991-05-22 Andrew A.G. Abstrahlendes Koaxialkabel mit verbesserter Wasserabschirmcharakteristik
US5422614A (en) * 1993-02-26 1995-06-06 Andrew Corporation Radiating coaxial cable for plenum applications

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MORGAN: "COMMUNICATIONS IN THE ENGLISH CHANNEL TUNNEL", ELECTRO CONFERENCE RECORD, vol. 16, 16 April 1991 (1991-04-16) - 18 April 1991 (1991-04-18), NEW YORK,NY,US, pages 514 - 518, XP000288427 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2920918A1 (fr) * 2007-09-06 2009-03-13 Nexans Sa Cable rayonnant.
EP2345535A1 (de) 2010-01-18 2011-07-20 Armacell Enterprise GmbH Brandschutzsystem für expandierte Polymere
CN104377413A (zh) * 2014-11-18 2015-02-25 中天日立射频电缆有限公司 自融冰漏泄同轴电缆及其制作方法
CN104377413B (zh) * 2014-11-18 2017-05-03 中天日立射频电缆有限公司 自融冰漏泄同轴电缆及其制作方法
CN110189857A (zh) * 2019-06-18 2019-08-30 海盐九里电子有限公司 一种新型割草机信号线

Also Published As

Publication number Publication date
FR2742259A1 (fr) 1997-06-13
FR2742259B1 (fr) 1998-01-02

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