JP2001112139A - Connecting method for submarine cable - Google Patents
Connecting method for submarine cableInfo
- Publication number
- JP2001112139A JP2001112139A JP28335299A JP28335299A JP2001112139A JP 2001112139 A JP2001112139 A JP 2001112139A JP 28335299 A JP28335299 A JP 28335299A JP 28335299 A JP28335299 A JP 28335299A JP 2001112139 A JP2001112139 A JP 2001112139A
- Authority
- JP
- Japan
- Prior art keywords
- reinforcing layer
- strands
- welded
- submarine
- outer conductor
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、海底ケーブルの接
続方法に関し、特に、導体を同軸状に配置した海底ケー
ブルの接続方法に関する。The present invention relates to a method for connecting a submarine cable, and more particularly to a method for connecting a submarine cable in which conductors are arranged coaxially.
【０００２】[0002]
【従来の技術】海底に長距離に亙り布設されて電力の供
給を行う海底ケーブルにおいては、予め複数のケーブル
を工場で接続することによって長尺の海底ケーブルを構
成し、これを円弧状に巻いた状態で船積みし、布設海域
に輸送することが行われている。2. Description of the Related Art In a submarine cable laid over a long distance on the seabed to supply electric power, a plurality of cables are connected in advance at a factory to form a long submarine cable, which is wound in an arc shape. Ships are transported to the laying sea area in the state where they were installed.
【０００３】電力用海底ケーブルには、単一の導体を中
心に有するものと複数の導体を同軸状に配したものとが
ある。前者のケーブルは歴史が長く、従って、その接続
部についても数多くの種類が提案され、実績を有してい
るが、後者の接続部については、実用的なものがいまだ
提案されていない。[0003] There are two types of submarine power cables: one having a single conductor at the center and one having a plurality of conductors arranged coaxially. The former cable has a long history, and therefore, many types of connection parts have been proposed and proven, but no practical one has been proposed yet for the latter connection part.
【０００４】図３は、導体を同軸状に配置した海底ケー
ブルの構成例を示す。内部導体２の上に、半導電遮蔽層
３、内部絶縁体４、半導電遮蔽層５、複数の素線を巻き
付けた外部導体６、半導電遮蔽層７、外部絶縁体８、遮
蔽層９および防食層１０を順に形成した構成を有する。FIG. 3 shows a configuration example of a submarine cable in which conductors are arranged coaxially. On the inner conductor 2, a semiconductive shielding layer 3, an inner insulator 4, a semiconductive shielding layer 5, an outer conductor 6 around which a plurality of wires are wound, a semiconductive shielding layer 7, an outer insulator 8, a shielding layer 9, and The anticorrosion layer 10 is formed in order.
【０００５】このケーブルを接続するためには、通常の
接続部の例に従うならば、まず、内部導体を接続した上
に、外部導体を退避させた状態で半導電遮蔽層と絶縁補
強層を形成し、次いで、形成された絶縁補強層の上に半
導電遮蔽層を設け、その上に退避させておいた外部導体
の素線を並べて外部導体層を形成することになる。In order to connect this cable, according to the example of a normal connecting portion, first, after connecting the inner conductor, a semiconductive shielding layer and an insulating reinforcing layer are formed while the outer conductor is retracted. Then, a semiconductive shielding layer is provided on the formed insulating reinforcing layer, and the external conductor layers which have been evacuated are arranged on the semiconductive shielding layer to form an external conductor layer.
【０００６】[0006]
【発明が解決しようとする課題】しかし、従来のこの接
続方法によると、絶縁補強層を形成するときの外部導体
の処置が難しいために作業に支障を与えることが多く、
また、絶縁補強層の上に形成される外部導体層をいかに
構成するかの問題がある。特に、後者の問題は、ケーブ
ルを船積みする際に加わる曲げ力、あるいは円弧状に巻
いたままでの布設海域への輸送等を考えるとき、軽視で
きない事柄となる。However, according to the conventional connection method, it is often difficult to treat the external conductor when forming the insulating reinforcing layer, which often hinders the work.
In addition, there is a problem how to configure the external conductor layer formed on the insulating reinforcing layer. In particular, the latter problem cannot be neglected when considering the bending force applied when the cables are loaded or the transportation to the laying sea area while being wound in an arc shape.
【０００７】従って、本発明の目的は、絶縁補強層を形
成するときの外部導体の処置が容易であり、しかも、曲
げに対して充分な順応性を有した外部導体層を形成する
ことのできる海底ケーブルの接続方法を提供することに
ある。Accordingly, an object of the present invention is to form an outer conductor layer which is easy to treat the outer conductor when forming the insulating reinforcing layer and has sufficient adaptability to bending. An object of the present invention is to provide a method of connecting a submarine cable.
【０００８】[0008]
【課題を解決するための手段】本発明は、上記の目的を
達成するため、内部導体の上に、内部絶縁体、複数の素
線を巻き付けた外部導体、および外部絶縁体を順に形成
した海底ケーブルの接続方法において、互いに接続され
るべき双方の海底ケーブルの段剥ぎにおいて、前記内部
導体の接続部の周囲への絶縁補強層の形成を可能にする
位置で前記双方の海底ケーブルの前記外部導体の前記複
数の素線を切断して除去し、前記内部導体の接続とこれ
に続く前記絶縁補強層の形成が完了した後、前記双方の
海底ケーブルの前記外部導体の切断された前記複数の素
線の端面と前記複数の素線と同じ外径を有する他に準備
された外部導体用素線の端面を溶接することによって第
１の溶接部を形成し、前記複数の素線に溶接された前記
外部導体用素線を前記双方の海底ケーブルのそれぞれの
側から前記外部導体における前記複数の素線の前記内部
絶縁体に対する巻き付けと同じ方向になるようにして前
記絶縁補強層に巻き付け、巻き付けられた前記外部導体
用素線を前記双方の海底ケーブルの間で互いに溶接する
ことによって第２の溶接部を形成し、前記第１の溶接部
を前記内部絶縁体の周囲において互いに位置をずらせて
配置するとともに、前記第２の溶接部を前記絶縁補強層
の周囲において互いに位置をずらせて配置することを特
徴とする海底ケーブルの接続方法を提供するものであ
る。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a seabed in which an inner insulator, an outer conductor around which a plurality of wires are wound, and an outer insulator are sequentially formed on the inner conductor. In the method for connecting cables, the outer conductors of the two submarine cables are located at a position that enables formation of an insulating reinforcing layer around the connection portion of the inner conductor in stepping off the two submarine cables to be connected to each other. After the plurality of wires are cut and removed, and after the connection of the inner conductor and the subsequent formation of the insulating reinforcing layer are completed, the plurality of cut wires of the outer conductors of the two submarine cables are cut. A first welded portion was formed by welding the end face of the wire and the end face of the other prepared external conductor wire having the same outer diameter as the plurality of wires, and was welded to the plurality of wires. The outer conductor wire The wires for the outer conductor wound around the insulating reinforcing layer in the same direction as the winding of the plurality of wires in the outer conductor with respect to the inner insulator from the respective sides of both the submarine cables. Are welded together between the two submarine cables to form a second weld, the first weld is displaced from each other around the inner insulator, and It is another object of the present invention to provide a method of connecting a submarine cable, wherein welds are arranged so as to be shifted from each other around the insulating reinforcing layer.
【０００９】第１の溶接部は、内部絶縁体の周囲に配置
する関係から、溶接部が外部導体の素線よりも大きくあ
ってはならず、従って、多くの場合、溶接後にその表面
から突出している溶接ビードを研削等によって除去する
ことが行われる。The first weld, due to its location around the inner insulator, must not be larger than the strands of the outer conductor, and therefore often protrudes from its surface after welding. The welding bead is removed by grinding or the like.
【００１０】第２の溶接部は、内部絶縁体に比べて径が
大きく、円周方向に余裕のある絶縁補強層の周囲に配置
されるため、第１の溶接部のように径の制約が少ない。
従って、第２の溶接部は、外部導体用素線の先端部の側
面同士の溶接によって形成することが可能である。溶接
の容易さおよび溶接強度を確保する意味から、多くの場
合にこの溶接方法が採用される。The second welded portion has a diameter larger than that of the inner insulator and is arranged around the insulating reinforcing layer having a margin in the circumferential direction. Therefore, the second welded portion is limited in diameter as in the first welded portion. Few.
Therefore, the second welded portion can be formed by welding the side surfaces of the distal end portion of the external conductor strand. In many cases, this welding method is adopted in order to ensure the ease of welding and the welding strength.
【００１１】上記した内部絶縁体は、架橋ポリエチレン
により構成されるのが普通であり、その場合、絶縁補強
層の形成方法としては、架橋剤を含むポリエチレンテー
プを所定の個所に巻き回し、これを加熱することによっ
て架橋と全体の一体化を行うテープ巻きモールド方式、
あるいは絶縁補強層の形成部分に金型を配置してこれに
架橋剤を含む溶融ポリエチレンを押出機を使用して注入
し、加熱することによって架橋と全体の一体化を行う押
出モールド方式等が利用される。The above-mentioned internal insulator is generally made of cross-linked polyethylene. In this case, as a method of forming the insulating reinforcing layer, a polyethylene tape containing a cross-linking agent is wound around a predetermined location, and this is wound. Tape winding mold system that performs cross-linking and overall integration by heating,
Alternatively, an extrusion mold method or the like is used in which a mold is arranged at a portion where an insulating reinforcing layer is formed, and molten polyethylene containing a crosslinking agent is injected into the mold using an extruder and heated to perform crosslinking and integration of the whole. Is done.
【００１２】本発明における海底ケーブルは、多くの場
合、高圧ケーブルであり、従って、絶縁補強層の上に
は、電界緩和のための半導電遮蔽層が形成される。この
遮蔽層をクッション性の半導電テープの巻き付けによっ
て構成することが考えられ、このようにするときには、
第２の溶接部を形成するときに、熱および外傷の作用か
ら絶縁補強層を保護することが可能となる。この保護効
果は、半導電テープの上に半導電布テープを巻き付ける
ことによって、より確実なものとなる。The submarine cable of the present invention is a high-voltage cable in many cases, and therefore, a semiconductive shielding layer for electric field relaxation is formed on the insulating reinforcing layer. It is conceivable that this shielding layer is formed by winding a semiconductive tape having cushioning properties.
When forming the second weld, it is possible to protect the insulating reinforcing layer from the effects of heat and trauma. This protective effect can be further ensured by winding the semiconductive cloth tape on the semiconductive tape.
【００１３】[0013]
【発明の実施の形態】次に、本発明による海底ケーブル
の接続方法の実施の形態を説明する。図１は、接続作業
の手順を示す。（ａ）は絶縁補強層の形成工程を示した
もので、まず、互いに接続すべき海底ケーブル１、１´
の内部導体２、２´、半導電遮蔽層３、３´、内部絶縁
体４、４´、半導電遮蔽層５、５´、外部導体６、６
´、半導電遮蔽層７、７´、外部絶縁体８、８´、遮蔽
層９、９´および防食層１０、１０´を段剥ぎする。Next, an embodiment of a method for connecting a submarine cable according to the present invention will be described. FIG. 1 shows the procedure of the connection work. (A) shows a process of forming an insulating reinforcing layer, and first, the submarine cables 1 and 1 'to be connected to each other.
Internal conductors 2, 2 ', semiconductive shielding layers 3, 3', internal insulators 4, 4 ', semiconductive shielding layers 5, 5', external conductors 6, 6
′, The semiconductive shielding layers 7 and 7 ′, the external insulators 8 and 8 ′, the shielding layers 9 and 9 ′, and the anticorrosion layers 10 and 10 ′ are peeled off.
【００１４】このとき、外部導体６、６´は、図に示さ
れる絶縁補強層１１の形成を可能にする位置、換言する
ならば絶縁補強層１１の形成作業に支障を与えない位置
でその複数の素線が切断される。この例においては、絶
縁補強層１１を形成するために使用される架橋金型１２
の長さＬ1 の近傍で切断されている。At this time, the outer conductors 6 and 6 ′ are placed at a position where formation of the insulating reinforcing layer 11 shown in the drawing is possible, in other words, at a position where the formation of the insulating reinforcing layer 11 is not hindered. Is cut off. In this example, a cross-linking mold 12 used to form the insulating reinforcement layer 11 is shown.
Of being cut in the vicinity of the length L 1.
【００１５】絶縁補強層１１は、テープ巻きモールド方
式によって形成され、内部導体２、２´の接続部から内
部絶縁体４、４´にかけて巻かれた絶縁補強層１１の前
身であるテープ層（図示せず）に巻かれたダイヤフラム
１３の作用によって均一な形状に成型される。１４は架
橋金型１２の内部の気密性を確保するために設けられた
シール、１５はガス加圧口を示す。The insulating reinforcing layer 11 is formed by a tape winding molding method, and is a tape layer which is a predecessor of the insulating reinforcing layer 11 wound from the connection between the internal conductors 2 and 2 'to the internal insulators 4 and 4' (FIG. (Not shown), it is formed into a uniform shape by the action of the diaphragm 13. Reference numeral 14 denotes a seal provided for ensuring airtightness inside the cross-linking mold 12, and reference numeral 15 denotes a gas pressurizing port.
【００１６】加圧口１５からガスを封入して架橋金型１
２の内部を加圧した状態でテープ層を加熱し、これを架
橋することによって絶縁補強層１１を形成する。この結
果、絶縁補強層１１は、半導電遮蔽層３、３´から内部
導体２、２´にかけて巻かれた半導電テープによる遮蔽
層（図示せず）、および内部絶縁体４、４´と一体化さ
せられる。A gas is sealed from the pressurizing port 15 to form the cross-linking mold 1.
The tape layer is heated while the inside of the tape 2 is pressurized, and this is crosslinked to form the insulating reinforcing layer 11. As a result, the insulating reinforcing layer 11 is integrated with the shielding layer (not shown) formed by the semiconductive tape wound from the semiconductive shielding layers 3 and 3 'to the internal conductors 2 and 2', and the internal insulators 4 and 4 '. It is made.
【００１７】（ｂ）は、一方の海底ケーブル１の半導電
遮蔽層５から他方の海底ケーブル１´の半導電遮蔽層５
´にかけてクッション性の半導電テープと半導電布テー
プを巻き付けることによって遮蔽層１６を形成した状態
を示す。FIG. 3B shows a case where the semiconductive shielding layer 5 of one submarine cable 1 is connected to the semiconductive shielding layer 5 of the other submarine cable 1 ′.
The state in which the shielding layer 16 is formed by winding a semiconductive tape and a semiconductive cloth tape having cushioning properties over ′.
【００１８】（ｃ）は、切断した外部導体６、６´の各
素線６ａ、６ｂに対する外部導体用素線１７のバットウ
エルド方式による溶接作業を示す。素線６ａ、６ｂとこ
れと同径の外部導体用素線１７の先端の端面同士が溶接
機１８により溶接される。(C) shows a welding operation of the outer conductor wire 17 to the cut outer conductors 6 and 6 'by using the butt-weld method. The ends of the ends of the wires 6a and 6b and the outer conductor wires 17 having the same diameter are welded by a welding machine 18.
【００１９】素線６ａ、６ｂは、Ａのように階段状に切
断されている。１９は溶接部分、即ち、第１の溶接部を
示す。この第１の溶接部は、表面に突出した溶接ビード
を研削され、外径が素線６ａ、６ｂと同じになるように
仕上げられている。The wires 6a and 6b are cut in a step shape as shown at A. Reference numeral 19 denotes a welded portion, that is, a first welded portion. The first welded portion is formed by grinding a weld bead protruding from the surface and finishing the outer diameter to be the same as the wires 6a and 6b.
【００２０】（ｄ）は、素線６ａ、６ｂに溶接された外
部導体用素線１７、１７同士の溶接状態を示したもの
で、外部導体用素線１７、１７は、海底ケーブル１、１
´の双方の側から絶縁補強層１１の上に巻き付けられ、
余長を切断された後、その先端部を溶接される。(D) shows the welding state of the outer conductor strands 17, 17 welded to the strands 6a, 6b. The outer conductor strands 17, 17 are the submarine cables 1, 1
′, Wound on the insulating reinforcing layer 11 from both sides,
After cutting the excess length, the tip is welded.
【００２１】絶縁補強層１１への外部導体用素線１７、
１７の巻き付けは、外部導体６、６´における素線６
ａ、６ｂの巻き付け方向と同じ方向となるように行わ
れ、また、その溶接は、互いに接触させた先端の側面同
士を対象として行われる。溶接には、ＴＩＧ（Ｔｕｎｇ
ｓｔｅｎ Ｉｎｅｒｔ Ｇａｓ）溶接が利用され、これ
により第２の溶接部２０が形成される。An outer conductor element wire 17 to the insulating reinforcing layer 11;
17 is wound around the wires 6 on the outer conductors 6 and 6 '.
The welding is performed so as to be in the same direction as the winding direction of a and 6b, and the welding is performed on the side surfaces of the tips that are brought into contact with each other. For welding, TIG (Tung
(stent inert gas) welding is used to form the second weld 20.
【００２２】（ｅ）は、外部導体６、６´の素線６ａ、
６ｂと外部導体用素線１７の溶接、および外部導体用素
線１７同士の溶接が完了した状態を示す。図２は、第１
の溶接部１９と第２の溶接部２０の配置の状態を示した
もので、表１に示される構成の海底ケーブルを接続した
ときの例を示す。(E) shows the wires 6a of the outer conductors 6 and 6 ',
6B shows a state in which welding of the outer conductor wires 17 and 6b and welding of the outer conductor wires 17 are completed. FIG. 2 shows the first
2 shows an arrangement state of the welded portion 19 and the second welded portion 20, and shows an example when a submarine cable having a configuration shown in Table 1 is connected.
【００２３】[0023]
【表１】 [Table 1]
【００２４】図１（ｃ）における素線６ａ、６ｂの階段
状の切断構造Ａをケーブルの円周方向に４セグメント設
け（素線数８本と９本を２セグメントずつ）、さらに、
このときの階段状の切断構造における各素線の長さを隣
接間で１０ｍｍずつずらして設定する。In FIG. 1 (c), a step-shaped cutting structure A for the wires 6a and 6b is provided in four segments in the circumferential direction of the cable (the number of wires is eight and nine, two segments each).
At this time, the length of each element wire in the step-like cutting structure is set so as to be shifted by 10 mm between adjacent wires.
【００２５】従って、これにより、図２のＢの第１の溶
接部１９の間隔Ｌ2 は１０ｍｍとなる。これらの溶接部
１９は、もともと内部絶縁体４、４´の周囲に巻き付け
られた素線６ａ、６ｂとこれと同径の外部導体用素線１
７を接続したものであるから、各溶接部１９は内部絶縁
体４、４´の円周方向に無理なく納まることになる。Accordingly, the distance L 2 between the first welded portions 19 shown in FIG. 2B becomes 10 mm. These welds 19 are composed of the wires 6a and 6b originally wound around the inner insulators 4 and 4 'and the wire 1 for the outer conductor having the same diameter as the wires 6a and 6b.
7 are connected, each welded portion 19 fits comfortably in the circumferential direction of the internal insulators 4, 4 '.
【００２６】一方、絶縁補強層１１を内部絶縁体４、４
´の外径よりも５ｍｍ厚く設定したとすると、絶縁補強
層１１の外周は、内部絶縁体４、４´よりも５×π＝１
５．７ｍｍ大きくなる。この値は、外部導体用素線１７
の２本（６．３ｍｍ×２＝１２．６ｍｍ）以上となり、
２本の外部導体用素線１７を並列させて溶接した第２の
溶接部２０を充分に吸収できる寸法となる。On the other hand, the insulating reinforcing layer 11 is
Assuming that the outer diameter of the insulating reinforcing layer 11 is 5 mm thicker than the outer diameter of the internal insulators 4, 4 ', the outer circumference of the insulating reinforcing layer 11 is 5 × π = 1.
5.7 mm larger. This value is equal to the external conductor strand 17.
More than (6.3mm × 2 = 12.6mm)
The dimensions are such that the second welded portion 20 obtained by welding the two outer conductor wires 17 in parallel is sufficiently absorbed.
【００２７】Ｃに示される第２の溶接部２０の長さＬ3
を充分な機械的強度と充分に低い電気抵抗を得るために
２５ｍｍの長さに設定する。図１（ａ）および図２にお
いて、絶縁補強層１１の全長Ｌ4 を８００ｍｍに設定
し、両側の立ち上がり部Ｌ5 を１００ｍｍに設定したと
すると、第２の溶接部２０を配置するための長さＬ6 は
６００ｍｍとなる。The length L 3 of the second welded portion 20 shown at C
Is set to a length of 25 mm to obtain sufficient mechanical strength and sufficiently low electric resistance. In FIG. 1 (a) and FIG. 2, the overall length L 4 of the insulating reinforcing layer 11 was set to 800 mm, assuming that sets the rising portion L 5 on both sides to 100 mm, the length for placing the second weld portion 20 is L 6 becomes 600mm.
【００２８】第２の溶接部２０は３４個有り、これを３
セグメント（１１個、１２個、１１個）に分けると、１
セグメントの長さＬ7 は２５ｍｍ×１１〜１２個＝２７
５〜３００ｍｍとなり、各セグメントＳ1 、Ｓ2 、Ｓ3
を図のように配置すれば、長さＬ6 、即ち、絶縁補強層
１１の上に無理なく配置することができる。There are 34 second welds 20 and 3
When divided into segments (11, 12, 11), 1
The length of the segment L 7 is 25 mm × 11 to 12 pieces = 27
5 to 300 mm, and each segment S 1 , S 2 , S 3
Is arranged as shown in the figure, the length L 6 , that is, the insulating reinforcement layer 11 can be arranged without difficulty.
【００２９】以上により第１の溶接部１９と第２の溶接
部２０は整然と配置され、この結果、船積み時あるいは
輸送時の曲げに対して充分な順応性を備えた外部導体層
２１を形成することができる。なお、この例の場合の図
１（ａ）のＬ0 とＬ8 は、たとえば、２８００ｍｍと９
００ｍｍに設定され、Ｌ1 は約１，０００ｍｍに設定さ
れる。As described above, the first welded portion 19 and the second welded portion 20 are arranged in an orderly manner, and as a result, the outer conductor layer 21 having sufficient flexibility for bending during shipping or transportation is formed. be able to. In this case, L 0 and L 8 in FIG. 1A are, for example, 2800 mm and 9
It is set to 00 mm and L 1 is set to about 1,000 mm.
【００３０】外部導体層２１が形成された後、図示は省
略するが、外部導体層２１の上に図１の半導電遮蔽層７
から７´にかけて半導電テープが巻き付けられることに
よって外部導体層２１の表面の凹凸形状が緩和され、そ
の後、外部絶縁体８から８´にかけての外部絶縁層、遮
蔽層９から９´にかけての遮蔽層、および防食層１０か
ら１０´にかけての防食層が順次形成され、これによっ
て、所定の接続部が形成される。なお、防食層の上に
は、鉄線鎧装、座床層等が必要に応じて設けられる。After the outer conductor layer 21 is formed, the semiconductive shielding layer 7 of FIG.
The semi-conductive tape is wound from the outer conductor layer 7 to 7 ′, so that the unevenness on the surface of the outer conductor layer 21 is reduced. Then, the outer insulating layer from the outer insulator 8 to 8 ′ and the shielding layer from the shielding layer 9 to 9 ′ , And the anticorrosion layers from the anticorrosion layers 10 to 10 ′ are sequentially formed, thereby forming a predetermined connection portion. In addition, an iron wire armor, a seat bed layer, and the like are provided on the anticorrosion layer as necessary.
【００３１】外部絶縁体８と８´の間に設けられる外部
絶縁層は、外部絶縁体８の構成材によって形成方法が異
なり、本例のように外部絶縁体８がポリエチレンによっ
て構成される場合には、たとえば、エチレンプロピレン
ゴムテープの巻き付けによって形成され、一方、外部絶
縁体８が架橋ポリエチレンによって構成される場合に
は、前述したテープ巻きモールド方式あるいは押出モー
ルド方式等が適用される。The method of forming the external insulating layer provided between the external insulators 8 and 8 'is different depending on the constituent material of the external insulator 8, and when the external insulator 8 is made of polyethylene as in this embodiment. Is formed, for example, by winding an ethylene propylene rubber tape. On the other hand, when the external insulator 8 is made of crosslinked polyethylene, the above-described tape winding molding method or extrusion molding method is applied.
【００３２】[0032]
【発明の効果】以上説明したように、本発明による海底
ケーブルの接続方法によれば、互いに接続されるべき海
底ケーブルの段剥ぎにおいて、内部導体の接続部の周囲
への絶縁補強層の形成を可能にする位置で双方の海底ケ
ーブルの外部導体を構成する複数の素線を切断して除去
するため、絶縁補強層の形成を容易に行うことができ、
また、外部導体を除去した部分に絶縁補強層を形成した
後、切断された素線の端面とこれと同じ径の外部導体用
素線の端面を溶接して第１の溶接部を形成し、さらに、
双方の海底ケーブルのそれぞれの側から溶接した外部導
体用素線を外部導体の素線の巻き付け方向と同じ方向に
なるようにして絶縁補強層の上に巻き付け、巻き付けた
外部導体用素線を双方の海底ケーブルの間において相互
に溶接して第２の溶接部を形成し、以上により形成され
た第１の溶接部と第２の溶接部を内部絶縁体と絶縁補強
層の周囲にそれぞれ位置をずらせて配置するため、第１
および第２の溶接部の配置が整然とし、従って、接続部
に曲げが作用したとき、これに対して充分に順応するこ
とのできる外部導体層を形成することができる。As described above, according to the method of connecting a submarine cable according to the present invention, the formation of the insulating reinforcing layer around the connection portion of the inner conductor when the submarine cables to be connected to each other are stepped off. In order to cut and remove a plurality of wires constituting the outer conductor of both submarine cables at a position where it is possible to form, it is possible to easily form an insulating reinforcing layer,
Further, after forming the insulating reinforcing layer on the portion where the outer conductor is removed, the first welded portion is formed by welding the end surface of the cut wire and the end surface of the outer conductor wire having the same diameter as the cut end wire, further,
The outer conductor wires welded from each side of both submarine cables are wound on the insulating reinforcing layer in the same direction as the winding direction of the outer conductor wires, and the wound outer conductor wires are wound on both sides. Are welded to each other between the submarine cables to form a second weld, and the first weld and the second weld thus formed are respectively located around the inner insulator and the insulation reinforcing layer. The first to displace
And the arrangement of the second welds is orderly, so that it is possible to form an outer conductor layer which is sufficiently adaptable to bending when acting on the connection.
【図１】本発明による海底ケーブルの接続方法の実施の
形態を示す説明図であり、（ａ）（ｅ）は接続作業の手
順を示す。FIG. 1 is an explanatory view showing an embodiment of a method of connecting a submarine cable according to the present invention, wherein (a) and (e) show a procedure of a connection operation.
【図２】第１の溶接部と第２の溶接部の配置状態を示す
説明図。FIG. 2 is an explanatory diagram showing an arrangement state of a first welded portion and a second welded portion.
【図３】海底ケーブルの構成を示す断面図。FIG. 3 is a sectional view showing a configuration of a submarine cable.
１、１´ 海底ケーブル ２、２´ 内部導体 ３、３´、５、５´、７、７´ 半導電遮蔽層 ４、４´ 内部絶縁体 ６ａ、６ｂ 素線 ６、６´ 外部導体 ８、８´ 外部絶縁体 ９、９´、１６ 遮蔽層 １０、１０´ 防食層 １１ 絶縁補強層 １７ 外部導体層構成用素線 １８ 溶接機 １９ 第１の溶接部 ２０ 第２のの溶接部 ２１ 外部導体層 1, 1 'submarine cable 2, 2' inner conductor 3, 3 ', 5, 5', 7, 7 'semiconductive shielding layer 4, 4' inner insulator 6a, 6b strand 6, 6 'outer conductor 8, 8 'external insulator 9, 9', 16 shielding layer 10, 10 'anticorrosion layer 11 insulation reinforcing layer 17 strand for external conductor layer formation 18 welding machine 19 first welded part 20 second welded part 21 external conductor layer
フロントページの続き (71)出願人 000005120 日立電線株式会社 東京都千代田区大手町一丁目６番１号 (72)発明者 寺島 一希 東京都中央区銀座６丁目15番１号 電源開 発株式会社内 (72)発明者 今村 英生 東京都中央区銀座６丁目15番１号 電源開 発株式会社内 (72)発明者 関 雄次郎 東京都江東区木場一丁目５番１号 株式会 社フジクラ内 (72)発明者 武藤 秀二 東京都千代田区丸の内２丁目６番１号 古 河電気工業株式会社内 (72)発明者 加藤 幸一 茨城県日立市日高町５丁目１番１号 日立 電線株式会社パワーシステム研究所内 (72)発明者 水津 亮 茨城県日立市日高町５丁目１番１号 日立 電線株式会社日高工場内 (72)発明者 佐々木 勉 茨城県日立市日高町５丁目１番１号 日立 電線株式会社日高工場内 Ｆターム(参考） 5G355 AA03 AA10 BA04 BA11 CA15 CA23 5G375 AA02 AA04 AA20 CA03 CA12 CB05 CD17 EA08 Continued on the front page (71) Applicant 000005120 Hitachi Cable Co., Ltd. 1-6-1, Otemachi, Chiyoda-ku, Tokyo (72) Inventor Kazuki Terashima 6-15-1, Ginza, Chuo-ku, Tokyo Power Development Co., Ltd. (72) Inventor Hideo Imamura 6-15-1, Ginza, Chuo-ku, Tokyo Power Supply Development Co., Ltd. (72) Inventor Yujiro Seki 1-5-1, Kiba, Koto-ku, Tokyo Fujikura Co., Ltd. (72 Inventor Shuji Muto 2-6-1 Marunouchi, Chiyoda-ku, Tokyo Furukawa Electric Co., Ltd. (72) Inventor Koichi Kato 5-1-1 Hidakacho, Hitachi City, Ibaraki Prefecture Power Systems Hitachi Cable, Ltd. Inside the laboratory (72) Inventor Ryo Mizuzu 5-1-1, Hidaka-cho, Hitachi City, Ibaraki Prefecture Inside the Hidaka Plant, Hitachi Cable Co., Ltd. (72) Inventor Tsutomu Sasaki 5-1-1, Hidaka-cho, Hitachi City, Ibaraki Prefecture F-term in the Hidaka factory of Hitachi Cable, Ltd. (reference) 5G355 AA03 AA10 BA04 BA11 CA15 CA23 5G375 AA02 AA04 A A20 CA03 CA12 CB05 CD17 EA08
Claims (5)
を巻き付けた外部導体、および外部絶縁体を順に形成し
た海底ケーブルの接続方法において、 互いに接続されるべき双方の海底ケーブルの段剥ぎにお
いて、前記内部導体の接続部の周囲への絶縁補強層の形
成を可能にする位置で前記双方の海底ケーブルの前記外
部導体の複数の素線を切断して除去し、 前記内部導体の接続とこれに続く前記絶縁補強層の形成
が完了した後、前記双方の海底ケーブルの前記外部導体
の切断された前記複数の素線の端面と前記複数の素線と
同じ外径を有する他に準備された外部導体用素線の端面
を溶接することによって第１の溶接部を形成し、 前記複数の素線に溶接された前記外部導体用素線を前記
双方の海底ケーブルのそれぞれの側から前記外部導体に
おける前記複数の素線の前記内部絶縁体に対する巻き付
けと同じ方向になるようにして前記絶縁補強層に巻き付
け、 巻き付られた前記外部導体用素線を前記双方の海底ケー
ブルの間で互いに溶接することによって第２の溶接部を
形成し、 前記第１の溶接部を前記内部絶縁体の周囲において互い
に位置をずらせて配置するとともに、前記第２の溶接部
を前記絶縁補強層の周囲において互いに位置をずらせて
配置することを特徴とする海底ケーブルの接続方法。1. A method of connecting a submarine cable in which an inner insulator, an outer conductor around which a plurality of wires are wound, and an outer insulator are sequentially formed on an inner conductor. In step stripping, a plurality of wires of the outer conductor of both the submarine cables are cut and removed at a position that enables formation of an insulating reinforcing layer around a connection portion of the inner conductor, After the connection and the subsequent formation of the insulating reinforcing layer are completed, in addition to having the same outer diameter as the end faces of the plurality of cut wires of the outer conductors of the two submarine cables and the plurality of wires. A first weld is formed by welding an end face of the prepared outer conductor strand, and the outer conductor strand welded to the plurality of strands is formed from each side of the two submarine cables. To the outer conductor And wound around the insulating reinforcing layer in the same direction as the winding of the plurality of strands around the inner insulator, and the wound outer conductor strands are welded to each other between the two submarine cables. Thereby forming a second welded portion, wherein the first welded portion is displaced from each other around the inner insulator, and the second welded portion is located on the periphery of the insulation reinforcing layer. A method of connecting a submarine cable, wherein the submarine cable is arranged so as to be shifted.
に、前記複数の素線の外径から突出した部分が研削等に
より除去されることを特徴とする請求項１項記載の海底
ケーブルの接続方法。2. The seabed according to claim 1, wherein, after welding is completed, portions of the first welded portions protruding from outer diameters of the plurality of strands are removed by grinding or the like. How to connect the cable.
の先端部の側面同士の溶接によって形成されることを特
徴とする請求項１項記載の海底ケーブルの接続方法。3. The method of connecting a submarine cable according to claim 1, wherein the second welded portion is formed by welding side surfaces of the distal end portion of the external conductor strand.
にクッション性の半導電テープを巻き付けた状態で形成
されることを特徴とする請求項１項記載の海底ケーブル
の接続方法。4. The method of connecting a submarine cable according to claim 1, wherein said second welded portion is formed in a state in which a semiconductive tape having a cushioning property is wound on said insulating reinforcing layer. .
導電テープを巻き付けた上に半導電布テープの巻き付け
層を有することを特徴とする請求項４項記載の海底ケー
ブルの接続方法。5. The method for connecting a submarine cable according to claim 4, wherein the insulating reinforcing layer has a winding layer of a semiconductive cloth tape on which the cushioning semiconductive tape is wound.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28335299A JP3690948B2 (en) | 1999-10-04 | 1999-10-04 | Submarine cable connection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28335299A JP3690948B2 (en) | 1999-10-04 | 1999-10-04 | Submarine cable connection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001112139A true JP2001112139A (en) | 2001-04-20 |
| JP3690948B2 JP3690948B2 (en) | 2005-08-31 |
Family
ID=17664382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28335299A Expired - Fee Related JP3690948B2 (en) | 1999-10-04 | 1999-10-04 | Submarine cable connection method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3690948B2 (en) |
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