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Cable laying waterproof method

A cable laying and cable technology, which is applied in the direction of cable laying equipment, cable joints, cable accessories, etc., can solve the problems of insulation electrical and mechanical performance degradation, cable insulation breakdown, power loss, etc., and achieve obvious waterproof effect and good construction effect Effect

Inactive Publication Date: 2018-08-24
GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the water tree in the insulation reaches a saturated state, the electrical and mechanical properties of the insulation will drop sharply, and the conductive water tree will consume a large amount of electric energy, which will eventually cause cable insulation breakdown, thereby greatly reducing the service life of the cable.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A cable laying waterproof method, comprising the following steps;

[0014] S1: Strip the cable outer sheath, steel armor and copper shielding layer at 50-60cm from the end of the cross-linked power cable, and then strip off the inner sheath, semiconductor and cable core insulation layer at 10cm behind the cable head ;

[0015] S2: Put the stripped three-phase cable cores on the wire lugs respectively, and press them tightly with crimping pliers, and seal the end of the wire lugs, the joint between the root and the cable core insulation, and the opening of the outer sheath with waterproof glue to prevent water and moisture penetration;

[0016] S3: Put heat-shrinkable tubes on the three-phase cables with wire lugs respectively, heat-shrink and tighten them, and bind and fix the cable cores with PVC tape, put on the outer sheath of the cable head, and wrap the entire cable head with waterproof tape and PVC tape. Winding fixation and sealing;

[0017] S4: Put a steel wi...

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PUM

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Abstract

The invention belongs to the technical field of electric power safety, and particularly relates to a cable laying waterproof method. Water preventing pretreatment is performed on the cable head of thecable end part before cable waterproofing through the method so that the waterproof effect is great and the service life of the cable can be prolonged.

Description

technical field [0001] The invention belongs to the technical field of electric power safety, in particular to a cable laying waterproof method. Background technique [0002] At present, the production and application of cross-linked power cable products has a history of nearly 30 years. It has excellent electrical and mechanical properties in a dry environment, but in practical applications, due to insufficient preventive measures during cable laying, the cable will enter water or be damp, and the insulating material of the cable body will gradually absorb moisture in the environment. During operation, under the action of the electric field, a large number of water trees will be caused in the cable insulation over time, and the aging of the water trees will crack the insulating polymer. When the water tree in the insulation reaches a saturated state, the electrical and mechanical properties of the insulation will drop sharply, and the conductive water tree will consume a l...

Claims

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Application Information

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IPC IPC(8): H02G1/06H02G15/18
CPCH02G1/06H02G15/1806
Inventor 陈俊陈景达陈军华冯剑飞李智宇张易民李锦波杨达伟刘迪燊丁阳钱利宏赵国佑莫悦良陈桂洪郭志勇梁文波
Owner GUANGDONG POWER GRID CO LTD