Method for replacing insulator chains in 220 kV long-span high tower in live working

Abstract

The invention relates to an operating tool for replacing insulator chains in live working, particularly to a method for replacing insulator chains in a 220 kV long-span high tower in live working. The key point is that the technology bias is overcome in a way that arcing horns and grading rings on a yoke plate for connecting the insulator chains are temporarily dismantled on a cross arm of the 220 kV long-span high tower to reserve screw holes for connecting fixtures on the yoke plate; the upper fixture and the lower fixture are connected with the yoke plate to lift the insulator chains, and the stress borne by the entire tool is half of that in the prior art, so that bearing and operation on the big-load insulator chains can be realized; and an equipotential electrician is borne by a chairlift to enter and go out of the electric field at the cross arm, so that the safety and controllability are stronger, the operating method is simple, the operating tool can be directly obtained from the existing tools, time and labor saving as well as economy are realized, and the replacement of the insulator chains on a steel pipe pole high tower comes true.

Description

technical field [0001] The invention relates to an operating tool for live replacement of insulator strings, in particular to a live replacement method for 220kV large-span high-tower suspension insulator strings. Background technique [0002] With the development of technology, on high-voltage transmission lines, especially on some high-span transmission lines, the equipment used is heavy-load operation equipment. Due to the special type of high-tower equipment and heavy load, it is difficult to use conventional operation tools. Make a replacement. [0003] For example, the large-span high towers of 220kV Songhe I and II roads are designed with steel pipe poles in a tension-straight-line-straight-line-straight-line-tension spanning manner. The maximum vertical span is 2157m, and the total height of the tower is 118m, 145m, 181m, 162m respectively. The engineering conductor adopts double-split extra-strength steel-cored aluminum alloy wire (medium anti-corrosion), with a cr...

AI Technical Summary

Problems solved by technology

Because these heavy-loaded equipment are several times that of ordinary lines, ordinary live-line tensioners are too stressed and difficult to operate, which makes it impossible to operate the equipment effectively, which greatly increases the labor intensity of operators, but the work efficiency is low. extremely low; and because the height of the tower is extremely high, the tower shape formed needs to consider the environment, wind load and other factors, so the cross-arm structure is complicated, especially the installation of insulator strings, each phase of the tower is installed with a set of suspension insulator strings The arc angle and a set of voltage equalizing rings cannot find an effective space for installing work tools, so the long-span high-tower suspension insulator string cannot be used for live work.

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