EP1234202A1 - Agencement d'elements a fibres optiques et boitiers d'epissure pour elements a fibres optiques - Google Patents

Agencement d'elements a fibres optiques et boitiers d'epissure pour elements a fibres optiques

Info

Publication number
EP1234202A1
EP1234202A1 EP00977459A EP00977459A EP1234202A1 EP 1234202 A1 EP1234202 A1 EP 1234202A1 EP 00977459 A EP00977459 A EP 00977459A EP 00977459 A EP00977459 A EP 00977459A EP 1234202 A1 EP1234202 A1 EP 1234202A1
Authority
EP
European Patent Office
Prior art keywords
splice housing
splice
fiber optic
housing
power 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Withdrawn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
EP00977459A
Other languages
German (de)
English (en)
Inventor
Uwe Amerpohl
Ole Kjaer Nielsen
Uffe Nordlander
Heinrich Zumdick
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.)
NKT Cables GmbH and Co KG
Original Assignee
NKT Cables GmbH and Co KG
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 NKT Cables GmbH and Co KG filed Critical NKT Cables GmbH and Co KG
Publication of EP1234202A1 publication Critical patent/EP1234202A1/fr
Withdrawn legal-status Critical Current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
    • G02B6/4439—Auxiliary devices
    • G02B6/444—Systems or boxes with surplus lengths
    • G02B6/4441—Boxes
    • G02B6/4446—Cable boxes, e.g. splicing boxes with two or more multi fibre cables
    • G02B6/44465—Seals
    • 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
    • G02B6/4439—Auxiliary devices
    • G02B6/4471—Terminating devices ; Cable clamps
    • G02B6/44775—Cable seals e.g. feed-through

Definitions

  • the invention relates to an arrangement of optical waveguide elements and a splice housing for optical waveguide elements for high-voltage cables, in particular submarine cables, with optical waveguides preferably carried outside.
  • connecting sleeves for plastic-insulated high and medium voltage cables with optical fibers integrated in the cable shield (DE 40 12 183 A1; DE 39 05 090 A1), which have a separate splice housing in their structure for accommodating splices and excess lengths of the optical fiber, which depend on the number of fiber optic cables integrated in the cable shield is tubular or box-shaped and is arranged parallel to the socket pipe and in the area between the latter and a shrink hose enclosing the entire socket.
  • the fiber optic elements are inserted directly on the end faces of the splice housing.
  • the end faces are perpendicular to the axis of the high-voltage cable, so that the fiber optic elements maintain their stretched position in the transition from the cable to the splice housing.
  • the splice With permanently installed high-voltage cables, fiber optic elements located outside the splice housing are not a problem because there are no more bends after the installation. With other high-voltage cables, especially submarine cables, the splice is usually made before the laying process. During the laying process, the high-voltage cable is passed over at least one laying roller and bent. If there is a splice with a splice housing on the high-voltage cable, the splice housing must easily undergo the bends, it must not reduce the bendability of the high-voltage cable and still have to provide full protection for the fiber-optic elements during stress.
  • the fiber-optic elements would be compressed or stretched if they were inserted straight into the front of the splice housing, since there is no compensation length which could deflect stresses on the fiber-optic elements during bending. If you wanted to assign compensation lengths to the fiber optic elements, they would have to be taken into the splice housing, which increases the overall length and creates bulky housing sizes.
  • the invention is based on the fact that fiber optic elements are preferably, but not exclusively, located in the outer region (cable shield, reinforcement, outer gusset) of the high-voltage cable.
  • One or more stainless steel tubes in which one or more fiber optics are guided are considered, for example, as fiber optic elements.
  • the fiber optic elements are laid out from their position in the power cable with a 180 ° bend on the surface of the cable and then preferably inserted pressure-tight into the fiber optic splice housing through a stuffing box.
  • the FO elements are located in the reinforcement area.
  • the only stainless steel tube with fiber optic cables is thickened with a plastic cable sheath (made of PE) to approximately the diameter of one of the reinforcement wires and replaces one or more reinforcement wires.
  • the fiber optic fibers must each have an additional length of approximately one meter. If a factory splice is required, the extra length can be made available in the reinforcement machine. In the case of a fiber optic splice in the immediate vicinity of a power cable splice, the required additional length can also be provided.
  • the fiber optic elements must be inserted into the power cable structure and connected to each other via two fiber optic splice housings.
  • the fiber optic elements are led out of their position in the cable in an area outside the splice housing, are deflected there by about 180 ° with a large radius and are guided into the splice housing from below.
  • This arrangement of the fiber optic elements prevents compression and expansion of the elements under bending stress.
  • This type of fiber optic arrangement does not extend the fiber optic splice housing.
  • the splice housing is fixed on the cable and pressed onto the cable at the ends with two half rings working as clamps.
  • To increase the security against tensile stress it is possible to cut two of the reinforcement wires (if possible not those in the immediate vicinity of fiber optic elements), bend them up and screw them onto the inner end faces of the half rings with brackets. This additional locking offers both effective tensile fastening in the longitudinal direction and in the direction of rotation. Since the total number of armoring wires is usually not required for the forces of an energy cable during the laying process, cutting through two wires is unproblematic.
  • the stainless steel tube is inserted from the outside through the stuffing box into the bottom of the grooves in the side spaces and cut to length there.
  • the stuffing boxes are preferably at right angles to the base in the splice housing.
  • the FO fibers run without protection in the splice room.
  • the fiber optic fibers are spliced using conventional technology and provided with a splice protector. The splice protection can be clamped into a glued-in splice holder, glued in place or placed in the base of the groove.
  • the splice chamber in the splice housing consists of a flat space in the longitudinal direction of the splice housing and two deep grooves arranged lengthways (side spaces).
  • the fiber optic fibers can be inserted on one side, the extra length can be laid and removed on the other side (diagonally opposite). This gives the advantage of turning the direction of the fiber optic cables for splicing, so that there is more maneuverability.
  • the size of the splice chamber is so large that the minimum bending diameter of fiber optic fibers is not less than approx. 60 mm.
  • the depth of the side spaces and the width of the flat part of the splice chamber create a very good use of space.
  • the fiber optic cable entries consist of a metallic seal to the stainless steel tube and a gland seal.
  • the stuffing box seals against the PE jacket.
  • the cover of the splice case is closed pressure-tight. Welding technology is preferably provided for this purpose. High quality material (preferably stainless steel) is used for the welding technology and because of the desired corrosion resistance. Alternatively, the cover can be screwed on and sealed with an O-ring.
  • Fig. 1 is a side view of the splice housing and Fig. 2 is a section through cable and splice housing.
  • the FO splice housing 10 comprises two quarters of the circumference of the power cable 8 (above) and thus has the shape of a tube with a thick wall halved in the longitudinal direction. dung. In the lower two quarters of the power cable, the fiber optic elements are removed from the power cable for insertion into the splice housing.
  • the cable is reinforced on the outside with armoring wires 6 (6 'in FIG. 2).
  • the fiber optic splice housing 10 is detachably fastened on the energy cable, a half ring 20, 21 comprising the energy cable being used on both end faces 120 of the fiber optic splice housing 10.
  • the half rings 20, 21 are screwed onto the splice housing with screws 22.
  • the splice chamber consists of a flat space in the longitudinal direction and two deep grooves or side spaces 12, 12 'of approximately the same length arranged alongside it.
  • the space 13 for the splice chamber is preferably formed in the cover 101 of the splice housing.
  • the side spaces 12, 12 ' enlarge the splice space laterally and thereby allow the optical waveguide to be arched.
  • the outer edges of the splice housing are widened in a funnel shape wherever possible and provided with radii in order not to hinder the bending of the fiber optic elements and to prevent damage to the outer structural elements of the high-voltage cable.
  • the curvatures allow the protection to be applied smoothly e.g. in the form of a shrink tube or a shrink sleeve and facilitate the movements when laying.
  • a stuffing box 150 is provided on each lower longitudinal side of the FO splice housing for the pressure-tight insertion of the FO elements 30.
  • the stuffing box is screwed in and is pressure-tight with an O-ring seal against the surface of the optical fiber element 30.
  • a metallic seal is provided, in which a lead cone (or a comparable soft metal alloy) with an outer cone and an inner bore through which the stainless steel tube is guided is screwed into the inner cone of the stuffing box with a union nut.
  • the advantage of a metallic seal is its resistance to diffusion over a long period of time; a property that an O-ring seal does not necessarily bring with it.
  • the insertion bores 141 in the splice housing run at a relatively flat angle against the axis of the cable or splice housing - preferably in the angle range from 15 ° to 400 in the illustration in FIG. 1, the angle is approximately 250.
  • reference number 32 is 32 FO splice indicated with splice protection.
  • the stainless steel tube 30 is inserted from the outside through the stuffing box 150 into the base of the side spaces 12, 12 '(see reference number 141 in FIG. 2) and cut to length there. From this point on, the optical fibers 33 run without protection.
  • the optical fibers 33 are spliced using conventional technology and provided with a splice protection 32.
  • the extra length of fiber optic Fibers are placed in a circle or in the form of an 8 in the splice room.
  • the splice protection can be clamped into a glued-in splice holder, glued on yourself or placed in the bottom of one of the side rooms.
  • the FO splice housing 10 is closed with the lid 101.
  • Circumferential profiles 102, 103, on which a weld seam can be applied, are arranged on the cover and assigned at the edge of the cover opening.
  • the FO splice housing 10 and its parts are made of stainless steel for use under water.
  • a reinforcing wire 6 is bent out on each end face 120 of the FO splice housing 10 and clamped in a tensile manner with a screw clamp 24 on the half ring 20, 21. From the figures it can be seen that a reinforcing wire 6 'is attached to the half rings with brackets and screws (24).
  • the space between the half rings 20, 21 can be closed with a cover 210 (as a sheet in the form of a half cylinder). Grooves 27 are provided in the half rings, where the cover 210 can be glued or screwed. The space under cover 210 is otherwise unsealed.
  • the splice chamber 12, 13 is preferably filled with a gel, preferably not beyond the volume of the side spaces.
  • a filling bore 160 with a closure can therefore be provided on the splice housing.
  • the splice chamber can be filled with a slight excess gas pressure.
  • a leak test should also be possible. If a silicone mass vulcanizable to the gel is used, the gas can be prevented from penetrating into or into the stainless steel tubes.
  • the filling bore 160 or a test opening is closed using the same technique as for the entries (stuffing boxes 150 and O-rings, or with lead plugs) for the stainless steel tubes.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Coupling Of Light Guides (AREA)
  • Cable Accessories (AREA)

Abstract

L'invention concerne un agencement d'éléments à fibres optiques et un boîtier d'épissure pour des éléments à fibres optiques (30) qui sont guidés dans un câble de puissance (8). Le boîtier d'épissure (10) entoure le câble de puissance (8) sur environ deux tiers de sa périphérie et est fixé sur celui-ci de sorte qu'une demi-bague (20, 21) entourant ledit câble de puissance (8) soit présente sur au moins une face (120) du boîtier d'épissure (10), ce dernier étant fixé de manière libérable avec ladite demi-bague. Les éléments à fibres optiques (30) sont extraits du câble de puissance (8) et introduits de manière étanche à la pression dans le boîtier d'épissure (10) en formant un arc de 180 DEG .
EP00977459A 1999-11-29 2000-11-02 Agencement d'elements a fibres optiques et boitiers d'epissure pour elements a fibres optiques Withdrawn EP1234202A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19957405 1999-11-29
DE19957405A DE19957405A1 (de) 1999-11-29 1999-11-29 Anordnung von Lichtwellenleiterelementen und Spleißgehäuse für Lichtwellenleiterelemente
PCT/EP2000/010787 WO2001040840A1 (fr) 1999-11-29 2000-11-02 Agencement d'elements a fibres optiques et boitiers d'epissure pour elements a fibres optiques

Publications (1)

Publication Number Publication Date
EP1234202A1 true EP1234202A1 (fr) 2002-08-28

Family

ID=7930727

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00977459A Withdrawn EP1234202A1 (fr) 1999-11-29 2000-11-02 Agencement d'elements a fibres optiques et boitiers d'epissure pour elements a fibres optiques

Country Status (6)

Country Link
EP (1) EP1234202A1 (fr)
AU (1) AU1517001A (fr)
BR (1) BR0012115A (fr)
CA (1) CA2389675A1 (fr)
DE (1) DE19957405A1 (fr)
WO (1) WO2001040840A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2929717B1 (fr) * 2008-04-08 2010-09-10 Draka Comteq France Boitier optique

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4841103A (en) * 1987-08-07 1989-06-20 Siemens Aktiengesellschaft Arrangement for the connection of an intermediate repeater for submarine cables
DE4012183A1 (de) * 1989-04-21 1990-10-25 Felten & Guilleaume Energie Aufschiebbare garnitur fuer kunststoffisolierte mittelspannungskabel mit mehreren integrierten lichtwellenleitern
NO178279C (no) * 1993-09-30 1996-02-21 Alcatel Kabel Norge As Skjöteanordning
DE29800885U1 (de) * 1998-01-20 1998-03-05 Rehau Ag + Co, 95111 Rehau Formteil zum Abdecken von Öffnungen
US6226435B1 (en) * 1999-05-03 2001-05-01 Terrance D. Hunsinger Bulbous configured fiber optic splice closure and associated methods

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0140840A1 *

Also Published As

Publication number Publication date
BR0012115A (pt) 2002-03-12
CA2389675A1 (fr) 2001-06-07
WO2001040840A1 (fr) 2001-06-07
AU1517001A (en) 2001-06-12
DE19957405A1 (de) 2001-06-13

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