DE4121058C1 - Fibre=optic cable with stress-relieving sheath - has central core with several optical fibres, and outer sheath containing helical stress relief elements - Google Patents

Fibre=optic cable with stress-relieving sheath - has central core with several optical fibres, and outer sheath containing helical stress relief elements

Info

Publication number
DE4121058C1
DE4121058C1 DE4121058A DE4121058A DE4121058C1 DE 4121058 C1 DE4121058 C1 DE 4121058C1 DE 4121058 A DE4121058 A DE 4121058A DE 4121058 A DE4121058 A DE 4121058A DE 4121058 C1 DE4121058 C1 DE 4121058C1
Authority
DE
Germany
Prior art keywords
relief elements
stress
strain relief
sheath
optical
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.)
Expired - Lifetime
Application number
DE4121058A
Other languages
German (de)
Inventor
Wilfried Dipl.-Ing. 7600 Offenburg De Boehle
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.)
Bosch Telecom GmbH
Original Assignee
ANT Nachrichtentechnik GmbH
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 ANT Nachrichtentechnik GmbH filed Critical ANT Nachrichtentechnik GmbH
Priority to DE4121058A priority Critical patent/DE4121058C1/en
Priority to DE9206636U priority patent/DE9206636U1/en
Application granted granted Critical
Publication of DE4121058C1 publication Critical patent/DE4121058C1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4401—Optical cables
    • G02B6/4429—Means specially adapted for strengthening or protecting the cables
    • G02B6/443—Protective covering
    • G02B6/4432—Protective covering with fibre reinforcements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4401—Optical cables
    • G02B6/4429—Means specially adapted for strengthening or protecting the cables
    • G02B6/44384—Means specially adapted for strengthening or protecting the cables the means comprising water blocking or hydrophobic materials

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Communication Cables (AREA)

Abstract

The optical cable includes a lateral-pressure tight optical core with optical waveguide arranged around around it. Various stress-relieving elements (4) are embedded in the sheath (1) of the core element, and have a lay length which is from 0.5 up to 10.0 times greater than the dia. of the helix formed by twisting. Glass fibre reinforced plastics, steel wire etc. can be used for the stress-relief material. USE - Optical telecommunications cables.

Description

Die Erfindung betrifft ein optisches Kabel gemäß dem Oberbegriff des Anspruchs 1 sowie ein zugehöriges Herstellungsverfahren.The invention relates to an optical cable according to the preamble of claim 1 and an associated manufacturing process.

Optische Kabel mit einem zur Zugentlastung dienenden Kernelement sind beispielsweise bekannt aus den Patentschriften DE 25 23 738, DE 30 23 398 und aus der Offenlegungsschrift DE 31 18 172.Optical cables with a core element used for strain relief are known for example from the Patents DE 25 23 738, DE 30 23 398 and from Publication DE 31 18 172.

Aus der DE-OS 37 06 677, Spalte 3, ist ein optisches Nachrichtenkabel bekannt, das als Kernelement eine optische Ader aufweist, um welche herum Lichtwellenleiter in weiteren Adern angeordnet sind und welche so fest und steif ausgebildet ist, daß sie als selbständig zu verlegendes Kabel und als Kernelement für einen Verseilvorgang verwendet werden kann. Dazu ist die Hülle der als Kernelement verwendeten Ader aus einem entsprechend harten Stoff und von der Wandstärke her entsprechend fest ausgebildet.From DE-OS 37 06 677, column 3 , an optical communication cable is known which has an optical core as the core element, around which optical fibers are arranged in further cores and which is so firm and rigid that it can be installed independently Cable and can be used as a core element for a stranding process. For this purpose, the sheath of the core used as the core element is made of a correspondingly hard material and of a correspondingly strong wall thickness.

Ausgehend von diesem Stand der Technik ist es Aufgabe der Erfindung, ein Kabel kompakter aufzubauen. Diese Aufgabe wird dadurch gelöst, daß das Kabel die im Kennzeichen des Anspruchs 1 aufgeführten Merkmale aufweist. Die erfindungsgemäß als Kernelement verwendete Ader mit in der Hülle integrierten Zugentlastungselementen ist bevorzugt eine Bündelader, bei der sich in der Hülle Lichtwellenleiter befinden, die von einem Gel umgeben sind. Based on this state of the art, it is the task of Invention to build a cable more compact. This task is solved in that the cable in the characterizing part of claim 1 Features listed. The used as core element according to the invention Core with in The casing integrated strain relief elements is preferred a loose tube, in which there are optical fibers in the sheath that are surrounded by a gel.  

Durch den erfindungsgemäßen Aufbau wird der Kabelquerschnitt besser ausgenützt. (Die Wandstärke der Hülle der als Kernelement dienenden Ader kann kleiner als bisher sein). Es kann auch eine kostengünstige Fertigung erreicht werden, wenn als Kernelement eine zugfeste Ader benutzt wird, die für andere Kabelkonstruktionen ohnehin benötigt wird.Due to the construction according to the invention, the cable cross section better exploited. (The wall thickness of the shell of the as Core core serving core can be smaller than before). It low cost manufacturing can also be achieved if as core element a tensile wire is used, which for other cable constructions are needed anyway.

In der Zeichnung ist ein Kernelement dargestellt mit einer Hülle 1, in der Zugentlastungselemente 4 eingebettet sind. In der Hülle befindet sich Gel 2, in dem Lichtwellenleiter 3 verlaufen. Die Zugentlastungselemente können aus glasfaserverstärktem Kunststoff, Stahldraht, -litze oder aus einem anderen geeigneten zugfesten Material bestehen.In the drawing, a core element is shown with a shell 1 , in which strain relief elements 4 are embedded. Gel 2 , in which optical waveguides 3 run, is located in the envelope. The strain relief elements can be made of glass fiber reinforced plastic, steel wire or strand or of another suitable tensile material.

Die Zugentlastungselemente sind mit einer Schlaglänge verseilt, die 0,5 bis 10 mal größer ist als der Wendeldurchmesser der durch die Verseilung gebildeten Wendeln. Bevorzugt bewegt sich die Schlaglänge in einem Bereich, der 1 bis 5 mal größer ist als der Wendeldurchmesser.The strain relief elements are with a lay length stranded that is 0.5 to 10 times larger than that Coil diameter of the coils formed by the stranding. The stroke length preferably moves in a range that Is 1 to 5 times larger than the helix diameter.

Durch die Verseilung wird erreicht, daß die als Kernelement verwendete Ader eine gewisse Druckfestigkeit aufweist, damit Querdrücke nicht dazu führen, daß die Ader in sich zusammenfällt und die darin enthaltenen Lichtwellenleiter in ihrer Funktion beeinträchtigt. Daß die infolge des Verseilens wendelförmig gestalteten Zugentlastungselemente nicht wie Schraubenfedern wirken, sondern tatsächlich Zugkräften widerstehen können, liegt daran, daß die Ader querdruckfest ausgebildet ist. Insbesondere kann diese Ader mit Gel gefüllt sein, das weitgehend inkompressibel ist.The stranding ensures that the core element used wire has a certain compressive strength so Lateral pressures do not cause the vein to come in coincides and the optical fibers contained therein impaired their function. That as a result of stranding helical strain relief elements do not like Coil springs act, but actually tensile forces can resist is because the vein is designed to be cross-pressure resistant. In particular, this vein can be filled with gel that is largely incompressible.

Das gezeigte Kernelement wird bevorzugt in der Weise hergestellt, daß die Hülle mit den verseilten Zugentlastungselementen in einem einzigen Extrusionsarbeitsgang hergestellt wird, bei dem die Zugentlastungselemente verseilt mit in die Hülle einlaufen.The core element shown is preferred in the manner made that the sheath with the stranded Strain relief elements in one Extrusion operation is produced in which the Strain relief elements run into the casing stranded.

Claims (6)

1. Optisches Kabel mit einem zur Zugentlastung dienenden, als querdruckfeste optische Ader ausgebildeten Kernelement, um das herum Lichtwellenleiter angeordnet sind, dadurch gekennzeichnet, daß in die Rolle (1) des Kernelementes Zugentlastungselemente (4) verseilt eingebettet sind.1. Optical cable with a strain relief serving as a cross-pressure-resistant optical core element around which optical fibers are arranged, characterized in that in the role ( 1 ) of the core element strain relief elements ( 4 ) are embedded stranded. 2. Kabel nach Anspruch 1, dadurch gekennzeichnet, daß die Ader mit einem Gel (2) gefüllt ist.2. Cable according to claim 1, characterized in that the wire is filled with a gel ( 2 ). 3. Kabel nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die das Kernelement bildende Ader eine Bündelader ist.3. Cable according to claim 1 or 2, characterized in that the core forming the core element is a loose tube. 4. Kabel nach Anspruch 3, dadurch gekennzeichnet, daß die Zugentlastungselemente mit einer Schlaglänge verseilt sind, die 0,5 bis 10 mal größer ist als der Wendeldurchmesser.4. Cable according to claim 3, characterized in that the Strain relief elements stranded with a lay length are 0.5 to 10 times larger than that Spiral diameter. 5. Kabel nach Anspruch 4, dadurch gekennzeichnet, daß die Zugentlastungselemente mit einer Schlaglänge verseilt sind, die 1 bis 5 mal größer ist als der Wendeldurchmesser.5. Cable according to claim 4, characterized in that the Strain relief elements stranded with a lay length are 1 to 5 times larger than the helix diameter. 6. Verfahren zur Herstellung eines Kabels nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Hülle mit den verseilten Zugentlastungselementen in einem einzigen Extrusionsarbeitsgang hergestellt wird, bei dem die Zugentlastungselemente verseilt mit in die Hülle einlaufen.6. Method for producing a cable according to one of the preceding claims, characterized in that the Cover with the stranded strain relief elements in one only extrusion step is produced, in which the Strain relief elements run into the casing stranded.
DE4121058A 1991-06-26 1991-06-26 Fibre=optic cable with stress-relieving sheath - has central core with several optical fibres, and outer sheath containing helical stress relief elements Expired - Lifetime DE4121058C1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE4121058A DE4121058C1 (en) 1991-06-26 1991-06-26 Fibre=optic cable with stress-relieving sheath - has central core with several optical fibres, and outer sheath containing helical stress relief elements
DE9206636U DE9206636U1 (en) 1991-06-26 1992-05-15 Cable with optical fibers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4121058A DE4121058C1 (en) 1991-06-26 1991-06-26 Fibre=optic cable with stress-relieving sheath - has central core with several optical fibres, and outer sheath containing helical stress relief elements

Publications (1)

Publication Number Publication Date
DE4121058C1 true DE4121058C1 (en) 1992-10-29

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ID=6434761

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Application Number Title Priority Date Filing Date
DE4121058A Expired - Lifetime DE4121058C1 (en) 1991-06-26 1991-06-26 Fibre=optic cable with stress-relieving sheath - has central core with several optical fibres, and outer sheath containing helical stress relief elements

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Country Link
DE (1) DE4121058C1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7816605B2 (en) 2008-05-13 2010-10-19 Bennex As Seismic cable connection device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2631538A1 (en) * 1975-08-14 1977-02-24 Int Standard Electric Corp OVERLAND LINE AND ITS LAYING
DE3118172A1 (en) * 1981-05-08 1982-11-25 Philips Kommunikations Industrie AG, 8500 Nürnberg Longitudinally watertight optical communication cable
DE2523738C2 (en) * 1974-05-31 1986-12-18 The Post Office, London Optical communication cable
DE3706677A1 (en) * 1987-03-02 1988-09-15 Siemens Ag OPTICAL NEWS CABLE
DE3023398C2 (en) * 1979-06-28 1989-11-16 Les Cables De Lyon S.A., Lyon, Fr

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2523738C2 (en) * 1974-05-31 1986-12-18 The Post Office, London Optical communication cable
DE2631538A1 (en) * 1975-08-14 1977-02-24 Int Standard Electric Corp OVERLAND LINE AND ITS LAYING
DE3023398C2 (en) * 1979-06-28 1989-11-16 Les Cables De Lyon S.A., Lyon, Fr
DE3118172A1 (en) * 1981-05-08 1982-11-25 Philips Kommunikations Industrie AG, 8500 Nürnberg Longitudinally watertight optical communication cable
DE3706677A1 (en) * 1987-03-02 1988-09-15 Siemens Ag OPTICAL NEWS CABLE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7816605B2 (en) 2008-05-13 2010-10-19 Bennex As Seismic cable connection device

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Date Code Title Description
8100 Publication of patent without earlier publication of application
D1 Grant (no unexamined application published) patent law 81
8363 Opposition against the patent
8330 Complete renunciation