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Heterogeneous conductor of submarine cable, processing method of heteroconductor, submarine cable and preparation method of submarine cable

A technology of submarine cables and processing methods, which is applied in the directions of submarine cables, conductors, insulated conductors, etc., can solve problems such as poor welding quality, and achieve the effect of improving welding quality.

Active Publication Date: 2022-02-01
ZHONGTIAN TECH SUBMARINE CABLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a submarine cable heterogeneous conductor and its processing method, submarine cable and its preparation method, to solve the problem of poor welding quality of submarine cable heterogeneous conductors in the prior art

Method used

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  • Heterogeneous conductor of submarine cable, processing method of heteroconductor, submarine cable and preparation method of submarine cable
  • Heterogeneous conductor of submarine cable, processing method of heteroconductor, submarine cable and preparation method of submarine cable
  • Heterogeneous conductor of submarine cable, processing method of heteroconductor, submarine cable and preparation method of submarine cable

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preparation example Construction

[0056] In yet another typical embodiment of the present application, a preparation method of the above-mentioned submarine cable is provided, the preparation method includes sequentially performing conductor shielding layer recovery, insulation layer recovery, insulation shielding layer recovery, The recovery of the metal shielding layer and the recovery of the non-metallic sheath layer, wherein the recovery of the insulating layer includes: performing stress cone peeling, extrusion molding, and vulcanization of the insulating layer in sequence. When the submarine cable heterogeneous conductor of the present application is used as the submarine cable conductor, it can be prepared by the conventional preparation method of the submarine cable, which expands the industrial applicability of the submarine cable heterogeneous conductor of the present application.

[0057] In some embodiments, the vulcanization described above is performed in a vulcanization mold with an induction coi...

Embodiment 1

[0061] The first step, cleaning (first conductor 1) copper monofilament and (fourth conductor 4) aluminum monofilament:

[0062] For copper power cable core a and aluminum power cable core b (the radial cross-sectional areas of copper power cable core a and aluminum power cable core b are equal and less than 120mm 2 ) after alignment pretreatment, place it on a special support, and use alcohol wipe and air shower to clean the surface before operation. After cleaning, the two power cores are dissected according to the predetermined size, and the layers are arranged in a T-shape from the outside to the inside, and the order is: non-metallic sheath layer, metal shielding layer, insulating shielding layer, insulating layer, conductor shielding layer, conductor, Among them, the insulating layer is longer than other component layers (stress cone peeling is required). After the stripping of each layer structure, the surface cleaning is carried out again:

[0063] The surface treatm...

Embodiment 2

[0095] The difference between embodiment 2 and embodiment 1 is that

[0096] In the first step, the radial cross-sectional areas of copper power cable core a and aluminum power cable core b are equal and greater than 120mm 2 .

[0097] In the second step, a cylindrical copper conductor (second conductor core 21 ) and an aluminum conductor (third conductor core 31 ) with a length of 15 mm and equal radial cross-sectional areas are respectively taken.

[0098] Form the first welding layer on the second conductor core 21 by friction welding three first circular welding segments to obtain the second conductor 2, one end of the first welding layer is flush with one end of the second conductor core 21, the first The other end of the welding layer protrudes from the second conductor core 21 by 15 mm, and the radial cross-sectional area of ​​the second conductor 2 is equal to that of the copper power cable core a.

[0099] Form the second welding layer on the third conductor core 31...

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Abstract

The invention provides a heterogeneous conductor of a submarine cable, a processing method of the heterogeneous conductor, the submarine cable and a preparation method of the submarine cable. The heterogeneous conductor of the submarine cable comprises a first conductor, a second conductor, a third conductor and a fourth conductor which are sequentially connected, wherein the second conductor comprises a second conductor core, the third conductor comprises a third conductor core, the second conductor and the third conductor are made of different materials, the first conductor and the second conductor are made of the same material, the third conductor and the fourth conductor are made of the same material, the first conductor is formed by twisting and pressing first conductor metal wires, and the fourth conductor is formed by twisting and pressing second conductor metal wires. The second conductor and the third conductor which are made of different materials are in friction welding, and an alloy structure made of two materials is formed at a joint, so electrochemical reaction between the second conductor and the third conductor can be restrained, and the strength of the copper-aluminum welding joint can be effectively controlled; and therefore, the welding quality of the heterogeneous conductor of the submarine cable is improved on the whole.

Description

technical field [0001] The invention relates to the technical field of submarine cables, in particular to a submarine cable heterogeneous conductor and a processing method thereof, a submarine cable and a preparation method thereof. Background technique [0002] The laying conditions of the submarine cable landing section are harsh, and it is the bottleneck section of the submarine cable ampacity. For this reason, most current submarine cable conductor cross-section designs are based on the landing ampacity, which inevitably leads to large ampacity margins and high costs in the submarine section. The common solution is to increase the cross-section of the submarine cable conductor after landing, and use factory joints or maintenance joints to connect unequal diameter submarine cables. However, whether it is engineering joints or maintenance joints, this technology is limited to copper conductors and cannot be used on aluminum It is implemented on conductor submarine cables,...

Claims

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Application Information

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IPC IPC(8): H01B7/00H01B7/14H01R4/62
CPCH01B7/009H01B7/14H01R4/625Y02A30/14B23K20/12
Inventor 聂影薛驰胡明张洪亮王丽媛赵囿林王海洋王文超杜强孙艳雨蔡华曹俊杰邱兴宇
Owner ZHONGTIAN TECH SUBMARINE CABLE CO LTD
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