Tool and operation method for live replacement of 220kv narrow base tower tension insulator string

Abstract

The invention discloses a tool for live change of a 220KV narrow base tower strain insulator string. The tool is formed by detachably connecting a triangular yoke plate clamp for connecting a triangular yoke plate, an insulating pull rod, a hydraulic lead screw, and a right-angle yoke plate clamp for connecting a right-angle yoke plate, wherein the triangular yoke plate clamp is used for connecting one end of the triangular yoke plate and the right-angle yoke plate clamp is used for connecting one end of the right-angle yoke plate to form a dual-clamping plate structure; the triangular yoke plate can be clamped and fixed between the two clamping plates of the triangular yoke plate clamp, and the right-angle yoke plate can be clamped and fixed between the two clamping plates of the right-angle yoke plate clamp. The tool disclosed by the invention is simple in structure, and easy to mount and operate; the live working method can reduce maintenance difficulty and improve efficiency, and is firmer to connect, high in strength, good in balance, capable of reducing potential safety hazard, effectively satisfying safety requirement in a narrow base tower live working process, realizing safe live maintenance and greatly improving safety and reliability of power grid operation.

Description

technical field [0001] The invention relates to the technical field of live operation of power grids and transmission lines, in particular to a tool for live replacement of 220KV narrow base tower tension insulator strings. Background technique [0002] With the development of society and economy, the society's demand for electric power is increasing, which promotes the continuous expansion of the grid scale. As the current main mode of power transmission, overhead line transmission is also increasing the scale of the line. With the acceleration of urbanization, the land resources are becoming more and more tense. The commonly used typical angle steel towers occupy a wide line channel and the towers are large, which cannot adapt to the current situation of land resources shortage in economically developed areas. However, if steel pipe poles are used, although it can meet the requirements of reducing the occupied area, the steel pipe pole lines have higher requirements than i...

AI Technical Summary

Problems solved by technology

However, due to the compact body and short arm span of the narrow-base steel pipe tower, the working clearance required by the conventional live-line working method cannot be satisfied; it can be said that the non-stop maintenance of the narrow-base tower is almost a blank field

[0005] At present, the use of new narrow base towers is accompanied by a new type of insulation configuration, that is, double insulators, one end of which is a triangular joint plate, and the other end is a right-angle joint plate. use

Existing devices for live replacement of tension insulator strings generally require at least two sets of devices to be installed between the same group of connecting plates, the structure is complex, the assembly and disassembly is cumbersome, and the connection structure is connected to the connecting plates by screws, so the strength is relatively low, and it is easy to cause damage. Loose screws cause potential safety hazards, low safety reliability, and some narrow base towers cannot meet the safety requirements during operation

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