Triple strain insulator string replacement method

Abstract

The invention provides an insulator chain replacement method, which comprises the following steps of: removing a grading ring at a lead end of an insulator chain, carrying out transposition and anchoring the grading ring, and installing a lead end clamp and a cross arm end clamp; tightening the hydraulic screw rod to pre-tighten the insulating pull rod; respectively hoisting the front card and the rear card of the auxiliary closed card; then the hydraulic tightener is tightened until the insulator string is loosened, and the load is transferred to the insulating pull rod; tightening the lengthened double-end screw rod, and sequentially removing the five insulators at the wire end; the socket tackle is connected with a corresponding insulator, the cross plate tackle is matched with the cross hanging plate, and an insulating rope penetrates through the steering tackle and is guided to the ground; then, the pulley block insulating rope is tightened, and the lengthened double-end lead screw and the auxiliary closed clamp rear clamp are dismounted; disconnecting the insulator string from the cross arm, and placing the insulator string on the ground by using an insulating rope and a pulley block; after the zero-value insulator and the low-value insulator are replaced, reverse operation is carried out, the whole string replacement work of the triple strain insulator string is completed, the operation is simple, and the replacement efficiency is high.

Description

technical field [0001] The invention relates to the technical field of overhauling of UHV transmission lines, and more specifically, to a method for replacing triple tension insulator strings. Background technique [0002] The safe and stable operation of UHV transmission lines is related to the safety of the power grid. When the power grid is in normal operation, it is inevitable to have low-value and zero-value insulators. The replacement of low-value and zero-value insulators is an important part of the safety maintenance work of the unit, and the insulator replacement fixtures and working methods are particularly important. [0003] At present, for the strain strings of UHV transmission lines, because the insulator strings are too long, each string of insulator strings has 74 pieces of insulators, the length of which is 15170 mm, and the total length is 17100 mm with connection fittings. When low-value and zero-value insulators appear, the operation method of replacing ...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defects existing in the prior art, the present invention proposes a replacement method for triple tension insulator strings, which solves the technical problem that the entire string of insulators in triple tension insulator strings cannot be replaced

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