CN1220471A

CN1220471A - Optical fiber composite overhead ground wire using steel tube

Info

Publication number: CN1220471A
Application number: CN 98125606
Authority: CN
Inventors: 宋必寿
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 1997-12-19
Filing date: 1998-12-18
Publication date: 1999-06-23
Also published as: JPH11242146A

Abstract

The invention provides an optical fiber composite overhead ground wire using steel tube. Optical fibers, a steel tube to which optical fibers are collectively inserted and which protects these collected optical fibers, a filler which is charged in the steel tube to prevent moisture from penetrating the optical fibers inserted to this steel tube, and tension wires which are arranged around the steel tube and are collected to function as a center support wire which supports the load of the cable and mechanically protect this cable from the outside are provided.

Description

Use the Optical Fiber composite overhead Ground Wire of steel pipe

The present invention relates to a kind of Optical Fiber composite overhead Ground Wire, more particularly, relate to a kind of Optical Fiber composite overhead Ground Wire of using steel pipe.

Two types of electric wires are arranged: underground cable and overhead wire in the prior art.Area beyond in the big city transmits electric power by overhead wire usually.Because overhead wire is subject to thunderbolt, so a kind of electric wire as lightning rod is installed on overhead wire, this electric wire is called as overhead ground wire.Simultaneously, this electric wire also needs a kind of order wire.Specifically, transmission line must comprise order wire so that make remote monitor.Overhead wire and order wire are installed separately, and if can be integral better.

But the general conductor such as copper or aluminium uses as lightning rod can produce a kind of impedance.In other words, can produce a kind of communication impedance that causes owing to induced voltage or induced current through the power line around the order wire.Voltage or current's intensity are directly proportional in size and the power line of this communication impedance, and the distance between order wire and the power line is inversely proportional to.Especially, when being subjected to the voltage conveying high-intensity currrent of hundreds of thousands volt, transmission line can produce powerful induced voltage or induced current, so that very strong communication impedance around order wire, occurs.Yet, in transmission line, but order wire must be installed.

In order to address the above problem, people have developed a kind of Optical Fiber composite overhead Ground Wire (OPGW).

Fig. 1 shows a kind of embodiment that uses the OPGW of loosening pipe, comprises optical fiber 100, ground floor filler 110, loosening pipe 120, second layer filler 130, aluminium bar 140 and tensile strength part 150.

Optical fiber 100 is installed in the loosening pipe 120, and the middle ground floor filler 110 that injects infiltrates the optical fiber 100 that is contained in loosening pipe 120 to prevent that water from dividing.Aluminium bar 140 has a plurality of grooves, and loosening pipe 120 is put into each groove so that protection optical fiber 100 is not subjected to outside bump or extruding.Between each groove of loosening pipe 120 and aluminium bar 140, inject second layer filler 130.Tensile strength part 150 can prevent corrosion, has the electrical characteristic of optical cable and the center bearing bracket of loading as cable.

Be exposed to ultraviolet following time for a long time after the OPGW that uses loosening pipe installs, loosening pipe can produce distortion, reduces the reliability of OPGW.If OPGW is only made by loosening pipe and tensile strength part, and does not adopt aluminium bar, then when OPGW was installed, pipe and optical fiber can damage owing to the extruding bump.

In order to address the above problem, the purpose of this invention is to provide a kind of Optical Fiber composite overhead Ground Wire of using steel pipe, this kind uses the Optical Fiber composite overhead Ground Wire of steel pipe because its favorable mechanical performance is easy to the cable installation preventing the erosion of the various elements of nature, and can not occur the phenomenon of degrading of pipe because of the rising of cable temperature.

Correspondingly, to achieve these goals, the invention provides a kind of Optical Fiber composite overhead Ground Wire of using steel pipe, it comprises: optical fiber; Steel pipe inserts fiber bundle with the protection fiber bundle in each steel pipe; Be injected in the steel pipe with prevent water divide in the optical fiber that infiltrates in the steel pipe filler and around the tensile strength part of steel pipe, this tensile strength part is as also protecting cable not corroded by the external environment factor effectively because the center bearing bracket that the cable that produces loads is installed.

Below by describing most preferred embodiment in conjunction with the accompanying drawings in detail, above-mentioned purpose of the present invention and advantage will be more apparent.

Fig. 1 is a kind of cross-sectional view that uses the embodiment of the Optical Fiber composite overhead Ground Wire (OPGW) of becoming flexible pipe;

Fig. 2 A and Fig. 2 B are a kind of cross-sectional views that uses the OPGW of steel pipe according to the first embodiment of the present invention;

Fig. 1 is a kind of cross-sectional view that uses the OPGW of steel pipe according to second embodiment of the present invention;

Fig. 4 is the cross-sectional view that the steel pipe of colored optical fiber is housed.

With reference to Fig. 2 A and Fig. 2 B, comprise according to a kind of Optical Fiber composite overhead Ground Wire (OPGW) of steel pipe of using of the present invention: optical fiber 200, filler 210, steel pipe 220 and tension are held and are cut element 230.

Optical fiber 200 adopts a kind of propylene clad optical fiber with external diameter He at least one inner core of 240 to 250 μ m, also marks with circle (round dot) with colour code, and optical fiber is distinguished from each other out.Optical fiber 200 is contained in the steel pipe 220 and reserves the length surplus of 0.1-0.5%.In steel pipe 220, inject filler 210.Filler 210 adopts resin-based glue filler to infiltrate in the optical fiber 200 that is contained in the steel pipe 220 to prevent that water from dividing.

The external diameter of steel pipe 220 is not less than 1.5mm and with being difficult for oxidation and nonabradable material is made.The external diameter of steel pipe 220 is equal to or less than the external diameter of tensile strength part 230.By the extruding or the method for soldering stainless steel steel plate steel pipe 220 being manufactured thickness is 0.1 to 0.3mm.If necessary, the steel pipe 220 outer aluminium laminations that coat are to prevent grinding off aluminium when steel pipe 220 contacts with tensile strength part 230.The steel pipe of making like this 220 can prevent fully that moisture from infiltrating and ultraviolet irradiation, and degrading and being out of shape appears in Guan Buhui thus, has increased the reliability of cable.Tensile strength part 230 is as the center bearing bracket of cable load.A kind of aluminium lamination that is covered with is used as tensile strength part 230 with the steel wire that prevents to wear and tear and have an electrical characteristic of optical cable.Tensile strength part 230 has one deck at least.Have when two-layer or more multi-layered at tensile strength part 230, each layer should be installed relatively.

With being the OPGW that a kind of steel pipe 220 and tensile strength part 230 are installed together shown in the 2A.Shown in Fig. 2 B is that a kind of tensile strength part 230 is installed in steel pipe 220 OPGW on every side.

Fig. 3 is that it comprises optical fiber 300, filler 310, steel pipe 320, aluminium bar 330 and tensile strength part 340 according to the cross-sectional view of a kind of OPGW of second embodiment of the present invention.

Optical fiber 300 adopts a kind of propylene clad optical fiber with external diameter He at least one inner core of 240 to 250 μ m, and marks with face knowledge sign and with circle (round dot), and optical fiber is distinguished from each other out.Optical fiber 300 is contained in the steel pipe 320 and reserves the length surplus of 0.1%-0.5%.

In steel pipe 320, inject filler 310 and divide the optical fiber 300 that infiltrates steel pipe 320 to prevent water.With a kind of resin-based glue filler as filler 310.

The external diameter of steel pipe 320 is not less than 1.5mm and with being difficult for oxidation and nonabradable material is made.The external diameter of steel pipe 320 is equal to or less than the external diameter of tensile strength part 340.By the method for extruding or soldering stainless steel steel plate, it is 0.1-0.3mm that steel pipe 320 is manufactured thickness.If necessary, cover layer of aluminum on the steel pipe 320, to prevent wearing and tearing aluminium when steel pipe 320 contacts with aluminium bar 330.The steel pipe of making like this 320 can prevent fully that moisture from infiltrating and ultraviolet irradiation, thereby has avoided degrading and being out of shape of pipe, has increased the reliability of cable.

Aluminium bar 330 has a plurality of grooves, and the steel pipe that optical fiber 300 is housed is put into groove, is not subjected to external impact and extruding with protection optical fiber 300.Steel pipe 320 so that have sufficient length surplus, thereby can not be had influence on optical fiber 300 by in the suitable groove of twisting in curved and the aluminium bar 330 of packing into when cable shortening or elongation.The groove of aluminium bar 330 is designed to external diameter greater than steel pipe 320.For increasing the inner core number of optical fiber 300, the optical fiber 300 more inner cores of in steel pipe 320, packing into, and the groove number of increase aluminium bar 330.According to need, can in the space between the groove of steel pipe 320 and aluminium bar 330, insert filler 310.

Tensile strength part 340 is a kind ofly to be covered with the steel wire of aluminium to prevent to wear and tear, and has the electric property of optical cable, and as the center bearing bracket of cable load.

Fig. 4 is a kind of steel pipe that comprises the optical fiber with different colours and circle (round dot) mark, and color and mark are for optical fiber is distinguished from each other out.

According to the present invention, cable is easy to install owing to its favorable mechanical performance and can prevents the erosion that it is not subjected to the nature factor, and owing to use steel pipe, can prevent fully that moisture from infiltrating and ultraviolet irradiation.Therefore, avoid degrading and being out of shape of pipe, improved the reliability of cable.

Claims

1, a kind of Optical Fiber composite overhead Ground Wire of using steel pipe has order wire simultaneously, and overhead ground wire and power line three's function is characterized in that it comprises:

Optical fiber;

Steel pipe for the protection fiber bundle, inserts fiber bundle in each steel pipe;

Inject steel pipe and divide the filler of the optical fiber that infiltrates steel pipe to prevent water; With

Around the tensile strength part of steel pipe, the center bearing bracket of the cable load that produces during as the installation cable, and protect cable to avoid extraneous erosion effectively.

2, the Optical Fiber composite overhead Ground Wire of use steel pipe as claimed in claim 1 is characterized in that, it also comprises the aluminium bar with a plurality of grooves, avoiding external impact and extruding with the protection steel pipe in the steel pipe insertion groove.

3, the Optical Fiber composite overhead Ground Wire of use steel pipe as claimed in claim 1 is characterized in that, it is equipped with the tensile strength part that is no less than one deck, and when two-layer or more multi-layered tensile strength part was housed, each layer installed relatively.

4, the Optical Fiber composite overhead Ground Wire of use steel pipe as claimed in claim 1 or 2 is characterized in that, optical fiber is a kind of propylene clad optical fiber with at least one inner core.

5, the Optical Fiber composite overhead Ground Wire of use steel pipe as claimed in claim 1 or 2 is characterized in that, optical fiber, and is marked with circle (round dot) being distinguished from each other with colour code.

6, the Optical Fiber composite overhead Ground Wire of use steel pipe as claimed in claim 1 or 2 is characterized in that, optical fiber has the length surplus of 0.1-0.5% and is loaded in the steel pipe.

7, the Optical Fiber composite overhead Ground Wire of use steel pipe as claimed in claim 1 or 2 is characterized in that, steel pipe has 1.5mm or bigger external diameter, and with being difficult for oxidation and wear-resisting material is made.

8, the Optical Fiber composite overhead Ground Wire of use steel pipe as claimed in claim 1 or 2 is characterized in that, is covered with aluminium on the steel pipe, to prevent the wearing and tearing of aluminium when steel pipe contacts with the tensile strength part.

9, the Optical Fiber composite overhead Ground Wire of use steel pipe as claimed in claim 1 or 2 is characterized in that, filler is a kind of resin-based glue compound.

10, the Optical Fiber composite overhead Ground Wire of use steel pipe as claimed in claim 1 or 2 is characterized in that, the tensile strength part is a kind of steel wire that is covered with aluminium.

11, the Optical Fiber composite overhead Ground Wire of use steel pipe as claimed in claim 2 is characterized in that, injects filler in steel pipe and between the groove of aluminium bar of steel pipe and protection steel pipe, divides in the optical fiber that infiltrates in the steel pipe to prevent water.

12, the Optical Fiber composite overhead Ground Wire of use steel pipe as claimed in claim 2 is characterized in that, the groove of aluminium bar is bigger than the external diameter of steel pipe.