JPS6257963B2 - - Google Patents
Info
- Publication number
- JPS6257963B2 JPS6257963B2 JP54161605A JP16160579A JPS6257963B2 JP S6257963 B2 JPS6257963 B2 JP S6257963B2 JP 54161605 A JP54161605 A JP 54161605A JP 16160579 A JP16160579 A JP 16160579A JP S6257963 B2 JPS6257963 B2 JP S6257963B2
- Authority
- JP
- Japan
- Prior art keywords
- cable
- submarine optical
- optical cable
- repeater
- tensile strength
- 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
Links
- 230000003287 optical effect Effects 0.000 claims description 54
- 239000000835 fiber Substances 0.000 claims description 10
- 230000001012 protector Effects 0.000 claims description 7
- 238000004873 anchoring Methods 0.000 claims description 2
- 230000000452 restraining effect Effects 0.000 claims 1
- 239000013307 optical fiber Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000005452 bending Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Mechanical Coupling Of Light Guides (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Description
【発明の詳細な説明】
本発明はドラム,シーブに巻き付いた中継器端
部のケーブルが極端に屈曲しても安全であると共
にケーブルの布設、引揚工事を安全に行うことが
できる海底光ケーブル引留装置に関する。
最近、光フアイバの出現によつて光フアイバを
用いたエネルギ伝送や情報伝送の技術開発が活発
に行なわれているが、光フアイバによる情報伝送
等の一態様として海底光ケーブルを使用する場
合、海底光ケーブルとそれを中継する海底光中継
器間における引留装置に関しては未だ具体的装置
例が示されていない。
このため本発明は、海底光ケーブルと海底光中
継器との接続部の許容曲率半径を本ケーブルの許
容曲率半径より小さくすることにより、布設工事
におけるドラム,シーブへの巻付き特性の良好な
作業性,安全性の高い海底光ケーブル引留装置を
提供することを目的とし、海底光ケーブルを海底
光中継器に引留める装置において、本ケーブルと
海底光中継器との間に、可撓型光ケーブルを用
い、本ケーブル外周に沿わせた抗張力体を介して
ケーブル張力を本ケーブルから直接中継器に伝達
することを特徴とする。
以下、本発明の一実施例を図面について説明す
ると、第1図は本発明の実施例の基本構造であつ
て、1は海底に係留され海底光ケーブル2を連結
し中継する海底光中継器で、この海底光中継器1
に接続部4を介して可撓型光ケーブル3が導かれ
ている。海底光ケーブル2の構造は第2図に示す
ように、ポリエチレン等よりなる外皮2aの内側
に抗張力線を取り巻いた抗張力体2bを配設し、
抗張力体2bの内側に耐水圧および給電を兼用す
るフアイバ収納パイプ2cを配設し、更にこのフ
アイバ収納パイプ2cの内側にフアイバ集合用中
心線2dを中心に多数撚り合わせた光フアイバ2
eを配設して構成されている。
また、海底光ケーブル2の許容屈曲半径が直管
状のフアイバ収納パイプ2cの座屈で決定される
ため大きいのに対し、可撓型光ケーブル3では、
コルゲートパイプ3bの断面形状および薄肉に起
因して許容曲率半径が小さいためケーブルとして
の許容曲率半径も小さい。
したがつて海底光中継器1が、自圧継手部のな
い硬直型であつて、ドラム,シーブに巻き付いた
時の中継器端部ケーブルが極端に屈曲した場合
も、ケーブルの安全を保つことが可能であり、海
底光中継器1を硬直型とすることは、中継器1の
小型軽量化,経済化,方式の信頼性向上などの点
で極めて有利となる。
また、可撓型光ケーブル3は海底光ケーブル2
と同径に形成され、PE被覆の外皮3aの内側に
可撓性を奏する断面が波目状の薄肉のコルゲート
パイプ3bを配設し、このコルゲートパイプ3b
の内側にピアノ線をコイル状に密巻きした耐水圧
保護体3cを配設し、この耐水圧保護体3c内に
光フアイバ2eを貫挿させている。そして、海底
光ケーブル2と可撓型光ケーブル3とは、それぞ
れの端面を突き合わせて接合し、かつフアイバ収
納パイプ2cを可撓型光ケーブル3の内側に突出
させ、前記保護体3cと溶接または接着しまたコ
ルゲートパイプ3bとフアイバ収納パイプ2cと
を溶接または接着することによつて両者の気密を
強力に図るべく接続されている。したがつて、海
底光ケーブル2と可撓型光ケーブル3は、内部に
配設したフアイバ収納パイプ2cおよびコルゲー
トパイプ3bに相応して屈曲可能な曲率半径を相
違させている。この他、5は海底光ケーブル2お
よび可撓型光ケーブル3の周面に抗張力線を捲回
してなる外装抗張力体で、その外装長さを海底光
ケーブル2に沿つて充分長く構成しており、6は
外装抗張力体5上に捲回したバインド線、7は海
底光中継器1の端部に配設された引留金具であ
る。
このように本発明の海底光ケーブルの引留装置
は構成されているから、海底光ケーブルの一端か
ら電気的光変換された情報は、光フアイバ2eの
光路を形成するコア内部を伝搬して光伝送路を移
行し、海底ケーブルの他端において光電気変換さ
れ再現される。
一方、海底光ケーブル2に加わるケーブル張力
は、バインド線6によつて海底光ケーブル2の外
周に固定された外装抗張力体5に移行し、海底光
ケーブル2に沿つた、外装抗張力体5を充分長く
とつてあるから、可撓型光ケーブル3と海底光ケ
ーブル2との接続部4では、ケーブル張力が外装
抗張力体5に全て移行し終つている。また、外装
抗張力体5の張力は、引留金具7によつて海底光
中継器1に伝達される。
またケーブル及び中継器の接続部に大きな曲げ
力が加わる状況は、布設又は引き揚げ中に中継器
が敷設船上にあるときのみ生じる。当然このとき
には接続部に水圧は加わつていない。従つてスパ
イラルに密巻された耐圧力保護体が曲げられてそ
の部分に間隙が生じても、薄肉水密パイプの損傷
はなく問題無い。一方中継器が海底に着底した後
はケーブルに張力や曲げ力は印加されていないの
で耐圧力保護体はその弾性で直線状に戻つて間隙
のない密巻された状態となる。その結果外周のコ
ルゲート上の薄肉水密パイプが水圧によつて座
屈、変形するのを内部から支えるようにして防止
し、総合して耐水圧、水密の機能を発揮し内部の
信号線を保護することができる。
第3図は本発明の他の実施例であつて、海底光
ケーブル2および可撓型光ケーブル3の周面に抗
張力線をスパイラル状に巻き付けた外装抗張力体
5a,5b上に、更にバインド線6を捲装し、ケ
ーブルの張力によるトルクの発生を強固に防止す
るようにした点を特徴とする。
第4図は本発明の更に他の実施例であつて、海
底光ケーブル2および可撓型光ケーブル3の周面
に炭素繊維等の高張力繊維よりなる編組外装抗張
力体5cを配設し、この外装抗張力体5c上にバ
インド線6を捲装し、中継器端部ケーブルの屈曲
剛性を軽減しドラム,シーブへの中継器の巻付き
特性を向上させたことを特徴とする。
本発明は以上のように、海底光ケーブルと海底
光中継器との間を薄肉コルゲートパイプを内包す
る可撓性の良好で許容曲率半径の小さなケーブル
を用いて電気的,光学的に接続し、前記コルゲー
トパイプ内に光フアイバ集合体を収容し、ケーブ
ル張力を海底光ケーブルの外周に巻き付けた抗張
力体により中継器に伝達する構造であるからドラ
ム,シーブに巻き付いた中継器端部のケーブルが
極端に屈曲してもケーブルを安全に維持すること
ができ、したがつてケーブルの布設・引揚工事を
安全に行なうことができる。またこのような構成
により中継器を硬直一体型とすることも可能とな
り、中継器の小型・軽量化,経済化,方式の信頼
性向上などの点で極めて有利な効果が得られる。 DETAILED DESCRIPTION OF THE INVENTION The present invention is a submarine optical cable tying device that is safe even when the cable at the end of the repeater wrapped around a drum or sheave is bent to an extreme extent, and also allows cable laying and hauling work to be carried out safely. Regarding. Recently, with the advent of optical fibers, technology development for energy transmission and information transmission using optical fibers has been actively conducted. No specific example of a device has been shown yet regarding the anchorage device between the submarine optical repeater and the submarine optical repeater that relays it. For this reason, the present invention improves the workability of wrapping around drums and sheaves during installation work by making the allowable radius of curvature of the connection part between the submarine optical cable and the submarine optical repeater smaller than the allowable radius of curvature of the cable. , aims to provide a highly safe submarine optical cable tying device, in which a submarine optical cable is tied to a submarine optical repeater, using a flexible optical cable between the cable and the submarine optical repeater. It is characterized by transmitting cable tension directly from the cable to the repeater via a tensile strength member placed along the outer circumference of the cable. Hereinafter, one embodiment of the present invention will be explained with reference to the drawings. Fig. 1 shows the basic structure of the embodiment of the present invention, in which 1 is a submarine optical repeater moored to the seabed and connects and relays submarine optical cables 2 ; This submarine optical repeater 1
A flexible optical cable 3 is guided through a connecting portion 4 . As shown in FIG. 2, the structure of the submarine optical cable 2 is such that a tensile strength body 2b surrounding a tensile strength wire is disposed inside an outer skin 2a made of polyethylene or the like.
A fiber storage pipe 2c for both water pressure resistance and power supply is arranged inside the tensile strength member 2b, and a large number of optical fibers 2 are twisted around the fiber assembly center line 2d inside the fiber storage pipe 2c.
It is configured by arranging e. In addition, while the allowable bending radius of the submarine optical cable 2 is large because it is determined by the buckling of the straight fiber storage pipe 2c, in the flexible optical cable 3 ,
Since the allowable radius of curvature is small due to the cross-sectional shape and thin wall of the corrugated pipe 3b, the allowable radius of curvature as a cable is also small. Therefore, even if the submarine optical repeater 1 is a rigid type without a self-pressure joint and the end cable of the repeater is extremely bent when wrapped around a drum or sheave, the safety of the cable cannot be maintained. It is possible, and making the submarine optical repeater 1 a rigid type is extremely advantageous in terms of making the repeater 1 smaller and lighter, making it more economical, and improving the reliability of the system. In addition, the flexible optical cable 3 is the submarine optical cable 2.
A thin-walled corrugated pipe 3b with a corrugated cross section that exhibits flexibility is arranged inside a PE-coated outer skin 3a, and this corrugated pipe 3b is formed to have the same diameter as
A water pressure resistant protector 3c made of piano wire tightly wound into a coil is disposed inside the water pressure resistant protector 3c, and an optical fiber 2e is inserted through the water pressure resistant protector 3c. The submarine optical cable 2 and the flexible optical cable 3 are joined by butting their respective end faces, and the fiber housing pipe 2c is made to protrude inside the flexible optical cable 3 , and is welded or bonded to the protector 3c. The corrugated pipe 3b and the fiber storage pipe 2c are connected by welding or bonding to ensure strong airtightness between the two. Therefore, the submarine optical cable 2 and the flexible optical cable 3 have different bendable radii of curvature corresponding to the fiber storage pipe 2c and the corrugated pipe 3b disposed inside. In addition, 5 is an exterior tensile strength body formed by winding a tensile strength wire around the circumferential surface of the submarine optical cable 2 and the flexible optical cable 3 , and the exterior length is configured to be sufficiently long along the submarine optical cable 2 ; A binding wire 7 is wound on the exterior tensile strength member 5, and a retaining metal fitting 7 is provided at the end of the submarine optical repeater 1. Since the submarine optical cable anchoring device of the present invention is configured as described above, information converted into electrical light from one end of the submarine optical cable propagates inside the core forming the optical path of the optical fiber 2e and travels through the optical transmission path. The signal is then converted to electricity and reproduced at the other end of the submarine cable. On the other hand, the cable tension applied to the submarine optical cable 2 is transferred to the outer tensile strength member 5 fixed to the outer circumference of the submarine optical cable 2 by the binding wire 6, and if the outer tensile strength member 5 along the submarine optical cable 2 is made sufficiently long. Therefore, at the connection portion 4 between the flexible optical cable 3 and the submarine optical cable 2 , all cable tension has been transferred to the exterior tensile strength member 5. Further, the tension of the exterior tensile strength member 5 is transmitted to the submarine optical repeater 1 by the retaining fitting 7. Also, situations where large bending forces are applied to the cable and repeater connections only occur when the repeater is on board the laying vessel during installation or salvage. Naturally, no water pressure is applied to the connection at this time. Therefore, even if the pressure-resistant protector tightly wound in a spiral is bent and a gap is created at that portion, the thin-walled watertight pipe will not be damaged and there will be no problem. On the other hand, after the repeater reaches the bottom of the seabed, no tension or bending force is applied to the cable, so the pressure protector returns to a straight line due to its elasticity, becoming tightly wound with no gaps. As a result, the thin-walled watertight pipe on the corrugated outer periphery is prevented from buckling or deforming due to water pressure by supporting it from the inside, and overall exhibits water pressure resistant and watertight functions and protects the internal signal line. be able to. FIG. 3 shows another embodiment of the present invention, in which a binding wire 6 is further provided on exterior tensile strength members 5a and 5b in which tensile strength wires are spirally wound around the peripheral surfaces of a submarine optical cable 2 and a flexible optical cable 3 . It is characterized by being wrapped to strongly prevent the generation of torque due to cable tension. FIG. 4 shows still another embodiment of the present invention, in which a braided exterior tensile strength member 5c made of high tensile strength fibers such as carbon fiber is disposed on the circumferential surface of the submarine optical cable 2 and the flexible optical cable 3 . It is characterized in that the binding wire 6 is wrapped around the tensile strength member 5c to reduce the bending rigidity of the cable at the end of the repeater and improve the winding characteristics of the repeater around the drum and sheave. As described above, the present invention electrically and optically connects a submarine optical cable and a submarine optical repeater using a cable with good flexibility and a small allowable radius of curvature that includes a thin-walled corrugated pipe, and Since the optical fiber assembly is housed in a corrugated pipe and the cable tension is transmitted to the repeater by a tensile strength member wrapped around the outer circumference of the submarine optical cable, the cable at the end of the repeater wrapped around the drum and sheave is extremely bent. The cable can be maintained safely even when the cable is in use, and therefore the cable installation and pulling work can be carried out safely. Further, such a configuration allows the repeater to be made into a rigid integrated type, which is extremely advantageous in terms of making the repeater smaller and lighter, making it more economical, and improving the reliability of the system.
第1図は本発明の実施例の基本構造を示す正面
図、第2図は本発明の実施例のうち、海底光ケー
ブルと可撓型光ケーブル及び両者の接続構造を拡
大して示す断面図、第3図は本発明の他の実施例
で、外装抗張力体の構造を示す正面図、第4図は
本発明の更に他の実施例で外装抗張力体の構造を
示す正面図である。
1……海底光中継器、2……海底光ケーブル、
2e……光フアイバ、3……可撓型光ケーブル、
3b……コルゲートパイプ、5……外装抗張力
体。
FIG. 1 is a front view showing the basic structure of an embodiment of the present invention, FIG. FIG. 3 is a front view showing the structure of an exterior tensile strength member according to another embodiment of the present invention, and FIG. 4 is a front view showing the structure of an exterior tensile strength member according to still another embodiment of the present invention. 1... Submarine optical repeater, 2 ... Submarine optical cable,
2e...Optical fiber, 3 ...Flexible optical cable,
3b...corrugated pipe, 5...exterior tensile strength body.
Claims (1)
において、内部に海底光ケーブルを収納するフア
イバ収納パイプの端部に、スパイラル状に密巻さ
れた耐圧保護体の端部を結合し、さらに前記の保
護体の外周に断面が波目状の薄肉水密コルゲイト
パイプを配設し、かつ前記のコルゲイトパイプの
端部を前記のフアイバ収納パイプの端部に結合し
たことを特徴とする海底光ケーブル引留装置。1. In a restraining device for a submarine optical cable and a submarine optical repeater, the end of a pressure-resistant protector tightly wound in a spiral shape is connected to the end of a fiber storage pipe that stores the submarine optical cable inside, and the above-mentioned protection is A submarine optical cable anchoring device, characterized in that a thin-walled watertight corrugated pipe with a wavy cross section is arranged around the outer circumference of the body, and an end of the corrugated pipe is connected to an end of the fiber storage pipe. .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16160579A JPS5685706A (en) | 1979-12-14 | 1979-12-14 | Submarine optical cable anchoring device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16160579A JPS5685706A (en) | 1979-12-14 | 1979-12-14 | Submarine optical cable anchoring device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5685706A JPS5685706A (en) | 1981-07-13 |
JPS6257963B2 true JPS6257963B2 (en) | 1987-12-03 |
Family
ID=15738329
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16160579A Granted JPS5685706A (en) | 1979-12-14 | 1979-12-14 | Submarine optical cable anchoring device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5685706A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6045212A (en) * | 1983-08-23 | 1985-03-11 | Sumitomo Electric Ind Ltd | Optical fiber cable |
-
1979
- 1979-12-14 JP JP16160579A patent/JPS5685706A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS5685706A (en) | 1981-07-13 |
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