JPH023962B2 - - Google Patents
Info
- Publication number
- JPH023962B2 JPH023962B2 JP59148407A JP14840784A JPH023962B2 JP H023962 B2 JPH023962 B2 JP H023962B2 JP 59148407 A JP59148407 A JP 59148407A JP 14840784 A JP14840784 A JP 14840784A JP H023962 B2 JPH023962 B2 JP H023962B2
- Authority
- JP
- Japan
- Prior art keywords
- optical submarine
- cable
- submarine cable
- branching device
- ground
- 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
Links
Landscapes
- Mechanical Coupling Of Light Guides (AREA)
- Light Guides In General And Applications Therefor (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、光海底ケーブルに用いる海中分岐装
置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an underwater branching device used for an optical submarine cable.
光伝送技術の進歩に伴い、海底ケーブルも光海
底ケーブルに変わりつつある。この際、３地点以
上の間に光海底ケーブルを布設する場合には、低
コスト化のため所望の個所に、光信号を分岐結合
する海中分岐装置が使用される。 With advances in optical transmission technology, submarine cables are also being replaced by optical submarine cables. At this time, when an optical submarine cable is installed between three or more points, an underwater branching device is used to branch and couple optical signals at desired locations to reduce costs.
この海中分岐装置にて分岐結合された光海底ケ
ーブルには、途中に設けられた中継器等のため
に、主光海底ケーブルの給電系とは別に、第３図
に示すように、分岐光海底ケーブルにも給電系が
必要である。 As shown in Figure 3, the optical submarine cable branched and coupled by this underwater branching device is equipped with a branch optical submarine cable, in addition to the power supply system of the main optical submarine cable, for repeaters installed on the way. The cable also requires a power supply system.
第３図ａは光海底ケーブルの布設要領図、ｂは
給電系図であつて、海を隔てた地上Ａ，地上Ｂ間
に光海底ケーブル（図では光海底ケーブル２と光
海底ケーブル３とで接続して示す）を布設した場
合に、この光海底ケーブルの中継器M1に対して
給電を行うため、第３図ｂの如く、地上Ａ，地上
Ｂのいずれか一方に、（＋）電源を、他方に（−）
電源を接続して行う。 Figure 3a is a diagram of the installation procedure for the optical submarine cable, and Figure 3b is a diagram of the power supply system.The optical submarine cable (in the figure, the optical submarine cable 2 and the optical submarine cable 3 are connected between ground A and ground B across the ocean). ) is installed, in order to supply power to repeater M1 of this optical submarine cable, connect the (+) power source to either ground A or ground B as shown in Figure 3b. , to the other (-)
Connect the power supply.
そして、地上Ａ及び地上Ｂのいずれとも、海を
隔てた離れた他の地上，例えば島Ｃと地上Ａ及び
地上Ｂとの間に光海底ケーブルを布設するには、
地上Ａ，地上Ｂ間を結ぶ光海底ケーブル２と光海
底ケーブル３の接続点に、海中分岐装置１を設け
海中分岐装置１内で、光海底ケーブル２及び光海
底ケーブル３内の光フアイバと、島Ｃ向けの分岐
光海底ケーブル４内の光フアイバとを接続する。 In order to lay an optical submarine cable between ground A and ground B and another land far away across the ocean, for example, between island C and ground A and ground B,
An underwater branching device 1 is provided at the connection point of the optical submarine cable 2 and the optical submarine cable 3 connecting between the ground A and the ground B, and within the underwater branching device 1, the optical fibers in the optical submarine cable 2 and the optical submarine cable 3 are connected to each other. The optical fiber in the branched optical submarine cable 4 destined for island C is connected.
この際、分岐光海底ケーブル４の途中に設けた
中継器M2、及び海中分岐装置１内に設けた制御
装置への給電のため、海中分岐装置１の近傍Ｄ点
にアース電極を設置し、島Ｃに（＋）電極を接続
する。このアース電極を流れる電流により、アー
ス電極の近辺に金属物、例えば海中分岐装置の筐
体等が存在すると、該金属物は電蝕を起こす。し
たがつて、電蝕防止のため、アース電極は、海中
分岐装置１より少なくとも数百米離れた海底位置
に設けなければならない。 At this time, in order to supply power to the repeater M 2 installed in the middle of the branched optical submarine cable 4 and the control device installed in the underwater branching device 1, a ground electrode was installed at point D near the underwater branching device 1, Connect the (+) electrode to island C. If a metal object, such as a casing of an underwater branching device, exists near the earth electrode, the current flowing through the earth electrode causes electrolytic corrosion of the metal object. Therefore, in order to prevent galvanic corrosion, the earth electrode must be provided on the seabed at least several hundred meters away from the underwater branching device 1.
この海中分岐装置には、低コストで、且つ布設
時の作業が容易なことが要望されている。 This underwater branching device is required to be low cost and easy to install.
従来の海中分岐装置は、第４図の一部破断平面
図の如く構成されている。
A conventional underwater branching device is constructed as shown in a partially cutaway plan view of FIG.
海中分岐装置１の本体の、円筒状の筐体の一方
の端面には、一方の光海底ケーブル２及びアース
ケーブル５が並列して導入され、他方の対面に
は、他方の光海底ケーブル３と、分岐光海底ケー
ブル４とが並列して導入されている。 One end surface of the cylindrical casing of the main body of the underwater branching device 1 has one optical submarine cable 2 and a ground cable 5 introduced in parallel, and the other optical submarine cable 3 and the other optical submarine cable 5 are introduced in parallel on the other side. , branch optical submarine cable 4 are installed in parallel.
これらの光海底ケーブル２，３、分岐光海底ケ
ーブル４及びアースケーブル５は、それぞれケー
ブル引留部１０，１１，１２及び１３を介して、
海中分岐装置本体の筐体に固着されている。 These optical submarine cables 2, 3, branch optical submarine cable 4, and ground cable 5 are connected to each other via cable retaining parts 10, 11, 12, and 13, respectively.
It is fixed to the casing of the underwater branching device main body.
また、それぞれのケーブルは、それぞれ気密封
止部８，９を通して、分岐装置筐体内部の分岐部
７に引き込まれている。 Moreover, each cable is drawn into the branch part 7 inside the branch device housing through the airtight seal parts 8 and 9, respectively.
光海底ケーブル２と同構造のアースケーブル５
は、長さがほぼ1000米で、内部の電源線が海中分
岐装置１内で、制御装置等に給電するとともに、
分岐光海底ケーブル４の電源線に接続されてい
る。 Ground cable 5 with the same structure as optical submarine cable 2
is approximately 1,000 meters long, and the internal power line supplies power to the control equipment, etc. within the underwater branch unit 1, and
It is connected to the power line of the branched optical submarine cable 4.
このアースケーブル５の端末を封止し、外被を
剥離して電源線を裸出せしめ、この裸出部の外周
面に導体金属，例えばチタン合金よりなるアース
電極６を接続装着し、海中にアースしている。 The terminal of this ground cable 5 is sealed, the jacket is peeled off to expose the power line, and a ground electrode 6 made of a conductive metal, for example, a titanium alloy, is connected to the outer peripheral surface of this exposed part, and then placed in the sea. It is grounded.
しかしながら上記従来の海中分岐装置は、光海
底ケーブルが２本、分岐光海底ケーブル及びアー
スケーブルがそれぞれ１本、計４本のケーブルが
筐体に導入され、それぞれにケーブル引留部が構
成されて構造が複雑で、コスト高であるばかりで
なく、高価のチタン合金よりなるアース電極を多
量に使用するという問題点がある。
However, the above-mentioned conventional underwater branching device has a structure in which a total of four cables, two optical submarine cables, one branch optical submarine cable and one ground cable each, are introduced into the housing, and a cable retention section is configured for each. This method is not only complicated and expensive, but also requires a large amount of earth electrodes made of expensive titanium alloy.
また、布設船上で４本のケーブルを海中分岐装
置に接続するという煩わしさがある。 Additionally, there is the hassle of connecting four cables to the underwater branching device on the laying ship.
上記従来の問題点は、少なくとも１つの光海底
ケーブルの外周に、さらに絶縁被覆されたアース
導体を該海中分岐装置より所望の長さ設け、該ア
ース導体の端部において、導電性外装体にて固着
された分割形のアース電極と接続してなる、本発
明の海中分岐装置によつて解決される。
The above-mentioned conventional problem is that an insulated ground conductor is further provided on the outer periphery of at least one optical submarine cable to a desired length from the underwater branching device, and a conductive outer sheath is attached to the end of the ground conductor. This problem is solved by the underwater branching device of the present invention, which is connected to a fixed split-type earth electrode.
上記本発明の手段によれば、光海底ケーブルの
海中分岐装置側の一部が、アース用ケーブルを構
成しているので、海中分岐装置に導入するケーブ
ルを３本にすることができ、ケーブルの接続作業
が容易である。
According to the above means of the present invention, since a part of the optical submarine cable on the underwater branching device side constitutes the grounding cable, the number of cables introduced into the underwater branching device can be reduced to three, and the number of cables can be reduced to three. Connection work is easy.
また、ケーブル引留部がそれなりに少なく、構
造が簡易であり、高価の材料は外装線のみに少量
使用することにより低コストである。 In addition, the number of cable anchoring parts is relatively small, the structure is simple, and a small amount of expensive material is used only for the outer wire, resulting in low cost.
さらにまた、アース電極が分割型であるので、
光海底ケーブルを切断することなくアース用ケー
ブルの端末に、アース電極を装着することができ
低コストである。 Furthermore, since the earth electrode is of a split type,
A grounding electrode can be attached to the terminal of a grounding cable without cutting the optical submarine cable, resulting in low cost.
以下図示実施例により、本発明の要旨を具体的
に説明する。なお、全図を通じて同一符号は同一
対象物を示す。
The gist of the present invention will be specifically explained below with reference to illustrated examples. Note that the same reference numerals indicate the same objects throughout the figures.
第１図は、本発明の１実施例の一部破断断面図
であり、第２図は、アース用ケーブルの断面図で
ある。 FIG. 1 is a partially cutaway sectional view of one embodiment of the present invention, and FIG. 2 is a sectional view of a grounding cable.
第１図及び第２図において、海中分岐装置４０
の本体４１の一方の端面には、光海底ケーブル２
０が導入され、他方の端面には光海底ケーブル３
と分岐光海底ケーブル４とが導入されている。 In FIGS. 1 and 2, the underwater branching device 40
The optical submarine cable 2 is attached to one end surface of the main body 41.
0 is introduced, and the optical submarine cable 3 is installed on the other end face.
and a branch optical submarine cable 4 have been introduced.
光海底ケーブル２０は、第３図ａにおいて、地
上Ａに接続される光海底ケーブル２に相当する。 The optical submarine cable 20 corresponds to the optical submarine cable 2 connected to the ground A in FIG. 3a.
光海底ケーブル２０の外周には、詳細を第２図
に示すようなアース用ケーブル３０が、海中分岐
装置４０の本体４１よりほぼ500米にわたり設け
られている。 On the outer periphery of the optical submarine cable 20, a grounding cable 30, the details of which are shown in FIG.
光海底ケーブル２０の心線の周囲に、螺旋状に
複数の光フアイバ２１が並設され、その外周に
は、絶縁層を介して抗張力体２２が螺旋状に並設
されている。抗張力体２２の外周には、例えば銅
パイプよりなる電源線２３が設けられ、電源線２
３の外周面は、外被となる絶縁体層２４（材料
は、例えばポリエチレン）が設けられている。 A plurality of optical fibers 21 are spirally arranged in parallel around the core wire of the optical submarine cable 20, and tensile strength members 22 are spirally arranged in parallel on the outer periphery of the fibers with an insulating layer interposed therebetween. A power line 23 made of, for example, a copper pipe is provided around the outer periphery of the tensile strength body 22.
An insulating layer 24 (made of polyethylene, for example) serving as an outer covering is provided on the outer circumferential surface of No. 3 .
アース用ケーブル３０は、この光海底ケーブル
２０の絶縁体層２４の外周に、例えば銅編組線よ
りなるアース導体２５が設けられ、アース導体２
５の外周面は、例えばポリエチレンよりなる外被
２６で覆われている。 The grounding cable 30 is provided with a grounding conductor 25 made of, for example, a copper braided wire, on the outer periphery of the insulating layer 24 of the optical submarine cable 20.
The outer peripheral surface of 5 is covered with a jacket 26 made of polyethylene, for example.
このように、光海底ケーブル２０の外周面に設
けられたアース用ケーブル３０のアース導体２５
は、分岐部７内で分岐側の光海底ケーブル４の電
源線に接続されている。 In this way, the ground conductor 25 of the ground cable 30 provided on the outer peripheral surface of the optical submarine cable 20
is connected to the power line of the optical submarine cable 4 on the branch side within the branch section 7 .
アース用ケーブル３０の端末は、外被２６が剥
離され、低価の導電性金属，例えばベリリウム銅
合金よりなる円筒状の導体を、軸方向に２分割し
た分割型のアース電極３１が、アース導体２５の
外周面に密着して装着されている。両端の外径が
小径の段付き半円筒形のアース電極３１の両端部
は、外被２６と同時にモールド成形された外被２
６Ａにより覆われ、光海底ケーブル２０の外被２
４とともに一体に固着されている。 At the end of the grounding cable 30, the jacket 26 is peeled off, and a split-type grounding electrode 31 is formed by dividing a cylindrical conductor made of a low-cost conductive metal such as a beryllium copper alloy into two in the axial direction. It is attached in close contact with the outer peripheral surface of 25. Both ends of the stepped semi-cylindrical earth electrode 31 with a small outer diameter at both ends are connected to the outer sheath 26, which is molded at the same time as the outer sheath 26.
6A, the outer sheath 2 of the optical submarine cable 20
It is fixed together with 4.
アース電極３１及び外被２６Ａの外周面は、硬
質で耐電蝕性あるいは導電性金属板、例えばチタ
ン合金フープ材よりなる外装線３２が、オーバー
ラツプ工法により巻着され、外装線３２の両端部
は、同材質の線材よりなる固着線３３を、巻着し
固着している。 An exterior wire 32 made of a hard galvanic corrosion-resistant or conductive metal plate, such as a titanium alloy hoop material, is wrapped around the outer peripheral surface of the earth electrode 31 and the outer sheath 26A by an overlap method, and both ends of the exterior wire 32 are A fixed wire 33 made of the same material is wound and fixed.
このようなアース用ケーブル３０の制作、及び
アース電極３１の装着は、光海底ケーブル２０を
切断することなく、予め工場内で容易にを実施す
ることができる。したがつて、高品質、且つ充分
な信頼性が得られる。 The production of such a grounding cable 30 and the attachment of the grounding electrode 31 can be easily carried out in advance in a factory without cutting the optical submarine cable 20. Therefore, high quality and sufficient reliability can be obtained.
また、アース電極３１及び外被２６Ａは、硬質
の外装線３２により保護されているので、布設時
に損傷することがない。 Moreover, since the earth electrode 31 and the outer sheath 26A are protected by the hard outer wire 32, they will not be damaged during installation.
なお、海中分岐装置４０は、実際に必要とする
ケーブルが３本のみで、構造が簡単で、低コスト
である。 Note that the underwater branching device 40 actually requires only three cables, has a simple structure, and is low in cost.
以上説明したように本発明は、光海底ケーブル
の外周部にアース用ケーブルを設けたもので、構
成が簡単で低コストであり、ケーブルの接続作業
が容易である等、実用上で優れた効果がある。
As explained above, the present invention provides a grounding cable on the outer periphery of an optical submarine cable, and has excellent practical effects such as a simple configuration, low cost, and easy cable connection work. There is.
第１図は本発明の１実施例の一部破断断面図、
第２図はアース用ケーブルの断面図、第３図ａは
光海底ケーブルの布設要領図、ｂは給電系図、第
４図は従来の海中分岐装置の一部破断平面図であ
る。
図において、１，４０は海中分岐装置、２，
３，２０は光海底ケーブル、４は分岐光海底ケー
ブル、５はアースケーブル、６，３１はアース電
極、８，９は気密封止部、１０，１１，１２，１
３はケーブル引留部、２１は光フアイバ、２３は
電源線、２５はアース導体、２６，２６Ａは外
被、３０はアース用ケーブル、３２は外装線、３
３は固着線、４１は本体をそれぞれ示す。
FIG. 1 is a partially cutaway sectional view of one embodiment of the present invention;
FIG. 2 is a sectional view of a grounding cable, FIG. 3a is a diagram of the installation procedure of an optical submarine cable, b is a diagram of a power supply system, and FIG. 4 is a partially cutaway plan view of a conventional underwater branching device. In the figure, 1, 40 are underwater branching devices, 2,
3 and 20 are optical submarine cables, 4 is a branch optical submarine cable, 5 is a ground cable, 6 and 31 are ground electrodes, 8 and 9 are hermetic sealing parts, 10, 11, 12, 1
3 is a cable retention part, 21 is an optical fiber, 23 is a power line, 25 is a ground conductor, 26, 26A is an outer jacket, 30 is a grounding cable, 32 is an exterior wire, 3
3 indicates a fixing line, and 41 indicates a main body.
Claims (1)
中分岐装置を介して、海底と接続される構成にお
いて、少なくとも１つの光海底ケーブルの外周
に、さらに絶縁被覆されたアース導体を該海中分
岐装置より所望の長さ設け、該アース導体の端部
において、導電性外装体にて固着された分割形の
アース電極と接続してなることを特徴とする光海
底ケーブルの海中分岐装置。1. In a configuration in which a ground conductor installed in an optical submarine cable is connected to the seabed via an underwater branching device, an insulated ground conductor is further connected to the outer periphery of at least one optical submarine cable from the underwater branching device. 1. An underwater branching device for an optical submarine cable, characterized in that the ground conductor has a desired length and is connected at the end thereof to a split-type ground electrode fixed by a conductive exterior body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14840784A JPS6127510A (en) | 1984-07-17 | 1984-07-17 | Undersea branching device of optical submarine cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14840784A JPS6127510A (en) | 1984-07-17 | 1984-07-17 | Undersea branching device of optical submarine cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6127510A JPS6127510A (en) | 1986-02-07 |
| JPH023962B2 true JPH023962B2 (en) | 1990-01-25 |
Family
ID=15452093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14840784A Granted JPS6127510A (en) | 1984-07-17 | 1984-07-17 | Undersea branching device of optical submarine cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6127510A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0282350U (en) * | 1988-06-07 | 1990-06-26 | ||
| JPH03121958U (en) * | 1990-03-27 | 1991-12-12 |
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|---|---|---|---|---|
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| US7349605B2 (en) | 2005-04-19 | 2008-03-25 | Adc Telecommunications, Inc. | Fiber breakout with radio frequency identification device |
| EP2380673A4 (en) | 2008-11-25 | 2016-12-21 | Nippon Steel & Sumitomo Metal Corp | DEVICE FOR CORRECTING A PIPE END FORM OF A UOE METALLIC PIPE |
| US8915659B2 (en) | 2010-05-14 | 2014-12-23 | Adc Telecommunications, Inc. | Splice enclosure arrangement for fiber optic cables |
-
1984
- 1984-07-17 JP JP14840784A patent/JPS6127510A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0282350U (en) * | 1988-06-07 | 1990-06-26 | ||
| JPH03121958U (en) * | 1990-03-27 | 1991-12-12 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6127510A (en) | 1986-02-07 |
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