A tool for live replacement of 220kv narrow base tower tension insulator strings

Abstract

The invention provides a tool for changing a 220kV narrow base tower strain insulator string with charges. The tool comprises a triangular yoke plate clamp, an insulating pull rod, a hydraulic lead screw, and a right-angled yoke plate clamp which are connected with one another detachably, wherein the triangular yoke plate clamp is connected with a triangular yoke plate, the right-angled yoke plate clamp is connected with a right-angled yoke plate, the insulating pull rod is connected to the triangular yoke plate clamp and the right-angled yoke plate clamp by means of the hydraulic lead screw, a double clamp plate structure is formed on each of one end, connected with the triangular yoke plate, of the triangular yoke plate clamp and one end, connected with the right-angled yoke plate, of the right-angled yoke plate clamp, the triangular yoke plate can be clamped and fixed between double clamp plates of the triangular yoke plate clamp, and the right-angled yoke plate can be clamped and fixed between double clamp plates of the right-angled yoke plate clamp. The tool is simple in structure, easy to install and operate, capable of lowering the difficulty of overhauling work and improving the efficiency, firm in connection, high in strength, good in balance, and capable of reducing hidden safety hazards, effectively meeting the safety requirement in the charged operation process of a narrow base tower to realize the safe charged overhauling, and greatly improving the running safety and reliability of a power grid.

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

The 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

Images