JPH069543Y2 - Submersible electrode structure for electricity - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is an energizing undersea device that is installed in the sea to supply electric power to a device such as a repeater connected to a submarine cable by using seawater as a return route. The present invention relates to an electrode structure.

[Conventional technology]

For equipment such as repeaters connected to the cable section from the submarine branch point of the submarine cable route to the landing station on the ground,
In order to supply electric power using seawater as a return route, it is necessary to install electrodes for energization near the branch point.

As a method that can be easily estimated from conventional techniques, there is a structure in which a rod-shaped, linear, or strip-shaped insoluble metal electrode is caught and wound around a submarine cable.

[Problems to be solved by the invention]

However, in the case of a rod-shaped metal electrode, there are many drawbacks such that the submarine cable portion to which it is attached becomes rigid and difficult to bend, and it becomes difficult to wind it around the installation drum.

In the case of a linear or strip-shaped metal electrode, its flexibility is not impaired and it can be easily wound around the installation drum, but it is weak against mechanical external force, so it can be pulled up for installation or repair / inspection. Sometimes there is a risk of fragmentation. Since these are made long to secure the required water contact area, if the vicinity of the connection point with the equipment is divided, the performance is remarkably deteriorated.

Furthermore, since metals that corrode due to an electrolytic reaction during energization cannot be used as electrode materials, very expensive materials such as Ti, Nb, Ta or Pt-plated materials thereof are usually used.

The present invention has been made in view of the above problems, and provides an undersea electrode structure for electricity which does not impair the flexibility of the submarine cable, is less affected by partial damage due to mechanical external force, and can be further reduced in cost. The purpose is to provide.

[Means and Actions for Solving Problems]

In order to achieve the above object, the present invention is characterized in that a metal conductor cored conductive plastic is coated on a submarine cable to be an energizing electrode, and the energizing electrode is used to connect to the undersea cable. The electric power is supplied to the equipment such as the relay device that is returned by using seawater as a return path.

〔Example〕

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an external view of an underwater electrode structure for conducting electricity according to an embodiment of the present invention, and FIG. 2 is a schematic view of a cross section thereof. That is, in the section corresponding to the required water contact area on the outer circumference of the submarine cable 1,
For example, a metal conductor such as copper, stainless steel, or steel wire is used as the core wire 2, and a conductive plastic electrode 4 molded with a conductive plastic 3 such as polyethylene containing carbon black is coated. At the connecting portion 5 of the electrode 4, the metal conductor core wire 2
Is connected to a normal power line 6 taken out of the equipment.
The conductive plastic electrode 4 is fixed to the submarine cable 1 with an adhesive or in the form of a tube having heat shrinkability, and is heated and brought into close contact. The metal conductor core wire 2
Is for reducing the voltage drop in the length direction of the cable 1 because the conductive plastic 3 has a relatively high resistivity, and is formed into a linear shape or a net shape.

The conductive plastic electrode 4 does not impair the flexibility of the submarine cable 1 since the electrode material is a conductive plastic containing a metal conductor core wire. Furthermore, although it may be partially damaged by mechanical external force, unless the entire surface of the submarine cable 1 in the circumferential direction is damaged, the water contact area is reduced by a minute amount of the damaged part. , There is no effective effect.

Further, since the electrolytic reaction accompanying the energization of the conductive plastic electrode 4 occurs only on the surface of the conductive plastic 3 in contact with seawater, the core wire 2 of the metal conductor is an ordinary material and does not cause a corrosion problem.

[Effect of device]

As described above, in the electrode structure of the present invention, the outer circumference of the submarine cable is covered with the metal conductor cored conductive plastic,
By energizing from there, there is a great advantage that the flexibility of the cable is not lost and the influence of partial damage due to a mechanical external force is small.

Further, in the case of a normal metal electrode, an expensive material such as Ti, Ta, Nb or a Pt-plated one must be selected in order to avoid electrolysis of the metal electrode when energized, whereas the present invention In that case, the material cost is less than 1/100 depending on the conditions, which is a great advantage in terms of economy.

[Brief description of drawings]

FIG. 1 is an external view of an embodiment of the present invention, and FIG. 2 is a schematic sectional view thereof. 1 ... Submarine cable, 2 ... Metal conductor core wire, 3 ... Conductive plastic, 4 ... Conductive plastic electrode, 5 ...
… Connector, 6 …… Power line.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masatoshi Onishi Inventor, Masatoshi 1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (56) Reference JP-A-56-114221 (JP, A) Showa 62-29719 (JP, U) Showa 36-1873 (JP, Y1) Showa 39-13257 (JP, Y1)

Claims (1)

[Scope of utility model registration request] 1. A submersible electrode structure for energizing, wherein a conductive plastic layer containing a metal conductor core wire coated on the outer periphery of a submarine cable is used as an electrode for energizing.