EP0171920A2 - Ein langes mit Bleischicht versehenes Starkstromseekabel, und ein Verfahren, dasselbe Herzustellen - Google Patents

Ein langes mit Bleischicht versehenes Starkstromseekabel, und ein Verfahren, dasselbe Herzustellen Download PDF

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Publication number
EP0171920A2
EP0171920A2 EP85304895A EP85304895A EP0171920A2 EP 0171920 A2 EP0171920 A2 EP 0171920A2 EP 85304895 A EP85304895 A EP 85304895A EP 85304895 A EP85304895 A EP 85304895A EP 0171920 A2 EP0171920 A2 EP 0171920A2
Authority
EP
European Patent Office
Prior art keywords
welding
lead
sheathed
cable
torch
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Withdrawn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
EP85304895A
Other languages
English (en)
French (fr)
Other versions
EP0171920A3 (de
Inventor
Hisao Koga
Hidehisa Nishihara
Shigekazu Fukuzono
Susumi Mitsi
Hiroshi Kubo
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.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries Ltd
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 Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Publication of EP0171920A2 publication Critical patent/EP0171920A2/de
Publication of EP0171920A3 publication Critical patent/EP0171920A3/de
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/14—Submarine cables

Definitions

  • This invention concerns a long, lead-sheathed, submarine power cable manufactured by joining a number of separate cable units or lengths in a factory by welding, and a process for producing the same.
  • an oil-filled submarine power cable is made up, concentrically from the inside to the outside, of an oil passage 11, a layer of conductive wires 12, a layer of oil- impregnated insulating paper 13, a lead-sheath 14, bedding 15, a layer of winding iron wires 16 and a protective layer 17.
  • the present inventors have keenly felt that the mechanization or automation of welding is of paramount importance in stabilizing the quality of cable joints sufficiently so as to prevent them from breaking. Accordingly, they made an extensive comparative study of the MIG welding process and the TIG welding process as well as of various conventional welding processes utilizing a gas torch. As a result, they found that conventional welding processes are generally unsuitable for the mechanization or automation of welding cables because it is very difficult to control a lot of related factors, such as the amount of a gas to be fed into a torch, the intensity of a torch flame, its ignition cycles, etc. in a well specified condition. From the above, they felt the necessity of adopting an electric welding technique, such as the MIG or the TIG welding process, for the purpose of the automation. However, the MIG welding process requires such a high electric current that it proved unsuitable for joining lead-sheathed units at low temperatures. Eventually they keenly advanced their study on the TIG welding process because it requires a comparatively small electric current.
  • the TIG welding process had been employed entirely in welding steel materials at high temperatures fcr a short time. For this, an electric current of more than 50 arperes is usually used. The situation was that no one had any idea at all that the TIG welding process could be applicable to welding lead-sheathed cable units. The present inventors carefully examined the application of the TIG welding process in many ways, repeated experiments to create a new process, and finally accomplished it.
  • the most important of all conditions is to control a welding electric current in the range 10 to 30 amperes, provided that the optimum welding electric current is 16 amperes.
  • the TIG welding process commonly requires a large electric current of more than 50 amperes.
  • a low electric current is applied to welding.
  • the welding electric current is greater than 30 amperes, holes are apt to form ir. the lead-sheath of cables, or molten lead drops from joints being welding because too much lead melts.
  • the welding electric current is less than 10 amperes, both the lead-sheath of cables and the welding rod are difficult to melt. From these, it is very important to use a welding electric current in the range of 10 to 30 amperes.
  • welding In order to melt lead well and make a good joint, it is desirable to effect the welding, in terms of the cross-sectional view of the cable 14, from its bottom (lowest point) to its top (highest point), in the direction indicated by the arrows in Fig. 4.
  • welding may be effected in such a way that the circumference of a cable is divided into two parts as shown in Fig. 4 (A), or into four parts as shown in Fig. 4 (B). The more the circumference is divided, the easier it becomes to Held, because the curvature that a torch follows becomes stricte.
  • the welders have to wear a mask because they cannot directly look at an arc with their naked eyes. Therefore, before an arc is struck, it is difficult for them to place the welding torch in the right position, because they are hindered by the darkness caused by the mask.
  • the combined use of robotics and the TIG welding process is very practical to achieve because, for example, the intensity of the torch flame is kept-constant by adjusting the electric current.
  • the torch flame can be ignited or extinguished automatically according to the distance between the weld and the torch. If the torch flame goes out by itself, the feed of the welding rod can be stopped by means of an interlocking mechanism. In this way, various control means may be put together so as to bring out their combined effect to the maximum extent.
  • Fig. 1 is a schematic illustration showing an apparatus comprising, in combination, a TIG welding device 34, and a multiarticulated robot 31 which is usually composed of five or more functional arms. Actually, it is preferable for the robot to have six articulated functional arms, namely, five common functional arms and one pneumatic 180° rotatable arm.
  • the apparatus also includes a robot control panel 32; a panel 33 through which various welding conditions are input; a control panel 35 for the TIG welding device; an automatic feeding device 36 fcr a welding rod, provided with a control panel 36a; and a weliding torch 37.
  • The.apparatus also includes a portion 38 where twc cable units meet each other in such a way that their lead-sheath 14 can be subjected to welding; a roller 39 for supporting a cable in the horizontal position; a welding rod 40 which is fed from, a reel 40a; and a grounding wire 41.
  • the welded joints are also quite free from pinholes, even if welding is effected manually.
  • the TIG welding process is combined with robotics, it is possible to put the distance between the welding torch and the base material, the distance between a welding torch and the welding rod, the welding speed, the welding temperature, etc. under such strict control that the joint quality is stabilized to a greater extent, and training workers to make them experts becomes unnecessary.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulated Conductors (AREA)
  • Arc Welding In General (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
  • Manufacturing Of Electric Cables (AREA)
  • Communication Cables (AREA)
  • Processing Of Terminals (AREA)
EP85304895A 1984-07-10 1985-07-09 Ein langes mit Bleischicht versehenes Starkstromseekabel, und ein Verfahren, dasselbe Herzustellen Withdrawn EP0171920A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP59143876A JPS6122510A (ja) 1984-07-10 1984-07-10 長尺鉛被海底電力ケーブルの製造方法
JP143876/84 1984-07-10

Publications (2)

Publication Number Publication Date
EP0171920A2 true EP0171920A2 (de) 1986-02-19
EP0171920A3 EP0171920A3 (de) 1988-07-20

Family

ID=15349059

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85304895A Withdrawn EP0171920A3 (de) 1984-07-10 1985-07-09 Ein langes mit Bleischicht versehenes Starkstromseekabel, und ein Verfahren, dasselbe Herzustellen

Country Status (3)

Country Link
EP (1) EP0171920A3 (de)
JP (1) JPS6122510A (de)
NO (1) NO852754L (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PT2312591T (pt) * 2009-08-31 2020-04-23 Nexans Barreira metálica anti-humidade resistente à fadiga em cabo elétrico submarino

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB361021A (en) * 1929-12-06 1931-11-19 Siemens Ag Improvements in or relating to submarine telephone cables
GB856069A (en) * 1958-05-08 1960-12-14 Standard Telephones Cables Ltd Improvements in or relating to the manufacture of electric cables
FR2254120A1 (en) * 1973-12-10 1975-07-04 Gates Rubber Co Welding lead battery component parts - without use of a flux to form a corro-sion resistant weld
JPS5842453U (ja) * 1981-09-16 1983-03-22 三菱重工業株式会社 油圧シリンダのシ−ル装置
JPS58192695A (ja) * 1982-04-20 1983-11-10 Furukawa Electric Co Ltd:The 鉛被ケ−ブルにおける鉛被の溶接方法

Also Published As

Publication number Publication date
JPH0349668B2 (de) 1991-07-30
JPS6122510A (ja) 1986-01-31
NO852754L (no) 1986-01-13
EP0171920A3 (de) 1988-07-20

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Inventor name: MITSI, SUSUMI

Inventor name: KOGA, HISAO

Inventor name: KUBO, HIROSHI

Inventor name: NISHIHARA, HIDEHISA

Inventor name: FUKUZONO, SHIGEKAZU