High-voltage cable single-phase dry-packaging repair method

Abstract

The invention relates to the technical field of high-voltage cable repair, particularly a high-voltage cable single-phase dry-packaging repair method. The repair method is characterized by comprisingthe following steps of 1) performing earlier stage processing on a single-phase faulty cable: stripping off a faulty cable outer sheath, reserving a part of steel armor at the two ends of the faulty cable, reserving a part of inner sheath at the two ends of the faulty cable, reserving a part of copper shielding part at the two ends of the faulty cable, reserving a part of semi-conductive layer atthe two ends of the faulty cable, stripping out a cable wire core, and cutting the two ends of a main insulating layer to form chamfers; and 2) performing recovery on the processed faulty cable: performing crimping on the single-phase faulty cable by a copper connecting pipe, wrapping the copper connecting pipe with a layer of semiconductor band in a half-overlaying manner, recovering the main insulating part, recovering the semiconductor, winding the cable by an armored band to recover the outer sheath, and performing high-voltage holding test and insulation resistance test on the recovered cable. By virtue of the repair method, manpower and material resources are saved, the flexible and rigid cables can be combined more tightly, the service life of the recovered cable can be prolonged, and the cable is more durable.

Description

technical field [0001] The invention relates to the technical field of high-voltage cable repair, in particular to a method for repairing a single coherent packet of a high-voltage cable. Background technique [0002] When the existing high-voltage cables are damaged and faulty, the demand for power supply is seriously affected. How to quickly repair and prolong the service life of the repaired part is an urgent problem to be solved. In the prior art, when a single-phase grounding or other damage occurs to a 6 to 10kv high-voltage cable, the damaged part is sawed off, and a section of intermediate cable is added to connect with both ends of the original cable. The skin of the original high-voltage cable hardens after being used for a period of time, and the newly added cable is relatively softer than the original cable. The connection size of the new cable has strict requirements and is difficult to determine. The stress at the junction of the new and old cables is too larg...

AI Technical Summary

Problems solved by technology

The skin of the original high-voltage cable hardens after being used for a period of time, and the newly added cable is relatively softer than the original cable. The connection size of the new cable has strict requirements and is difficult to determine

The stress at the junction of the new and old cables is too large, and there are defects such as unstable overall quality of the repaired cable, low service life, high cost of the added new cable, and low repair efficiency.

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