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Switching method and mould for crosslinked polyethylene insulated power cable

A cross-linked polyethylene and power cable technology, which is applied in the direction of connecting/terminating cables, etc., can solve the problems of serious economic losses, unqualified withstand voltage and damage of finished or semi-finished products of cross-linked polyethylene insulated power cables. Achieve obvious economic and social benefits

Inactive Publication Date: 2007-03-14
圣安电缆有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the cable manufacturing plant, whether it is in the manufacturing process or in the operation process, there will inevitably be manufacturing defects or due to collisions, the finished or semi-finished XLPE insulated power cables will fail to withstand voltage (breakdown) ) or damage
Under the current circumstances, the manufacturer can only saw it into sections, and those finished or semi-finished products whose length does not meet the requirements can only be scrapped, and the economic loss is very serious.

Method used

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  • Switching method and mould for crosslinked polyethylene insulated power cable
  • Switching method and mould for crosslinked polyethylene insulated power cable
  • Switching method and mould for crosslinked polyethylene insulated power cable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1, the length of the cable is not enough, the connection method of the cross-linked polyethylene insulated power cable connecting two cables into one:

[0034] 1) Conductor connection

[0035] The conductors are connected by layered silver soldering, and the solder points of each layer are staggered from each other. When welding, the two ends of the conductor are cooled with cooling water, and the diameter of the welding part is equal to that of the cable conductor;

[0036] 2) Conductor shielding and pre-vulcanization

[0037] Borrowing a special mold, the conductor shield vulcanization mold is composed of an upper mold 11 and a lower mold 12 to form a cylinder. The diameter of the round hole formed by the upper and lower mold bodies is slightly larger than the outer diameter of the conductor shield. The operation is as follows:

[0038] a. Clean the surface of the conductor, wrap it on the cable conductor in two layers with a semi-conductive tape, and over...

Embodiment 2

[0056] Embodiment 2, partial splicing, when the cable is bumped or damaged during transportation, there is no need to carry out the overall splicing of the cable, only a few steps in the splicing method are needed.

[0057] Insulation damage, referring to Example 1, starting from the third step, that is, insulation extrusion, and completing the subsequent steps;

[0058] Conductor shielding is damaged. Referring to Example 1, start from the second step, that is, conductor shielding and pre-vulcanization, and complete the subsequent steps.

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Abstract

This invention relates to cross polyethylene insulation power cable connection method in electricity industry, which comprises following steps: conductor connecting; conductor shielding and previous fulguration; insulation pressing; insulation fulguration; shield mask and repairing. The invention can connect two sections of cable or repair damaged part to ensure backward cable property standards.

Description

technical field [0001] The invention relates to a splicing method for cross-linked polyethylene (XLPE) insulated power cables and a special mold for the splicing method, belonging to the field of electrical engineering. technical background [0002] XLPE insulated wires and cables are popular due to their excellent electrical properties, high allowable operating temperature of conductors (90°C), large transmission capacity, simple structure, convenient installation and laying, no drop limit, and especially no risk of fire caused by oil leakage. The majority of users are welcome. [0003] In the cable manufacturing plant, whether it is in the manufacturing process or in the operation process, there will inevitably be manufacturing defects or due to collisions, the finished or semi-finished XLPE insulated power cables will fail to withstand voltage (breakdown) ) or damage. In the current situation, the manufacturer can only saw it into sections, and those finished or semi-fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G1/14
Inventor 马正厚闫永万孙萍孙永军凌鸿
Owner 圣安电缆有限公司
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