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Tool for electrified replacement of 500kV strain insulator string

A tension-resistant insulator string, live replacement technology, applied in the direction of overhead lines/cable equipment, etc., can solve the problem of difficult live operation of insulators, and achieve the effect of ensuring reliable power supply, good versatility, and safe and reliable use.

Inactive Publication Date: 2014-07-23
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a tool for live replacement of 500kV tension insulator strings, which solves the difficult problem of live operation for replacing the entire string of insulators at 500kV

Method used

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  • Tool for electrified replacement of 500kV strain insulator string
  • Tool for electrified replacement of 500kV strain insulator string

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Embodiment 1

[0022] From Figure 1 ~ Figure 2 As can be seen, the present invention includes front clamp 5, rear clamp 2, front clamping pulley 18, rear clamping pulley 9, insulating pull rod 14, tightening wire screw 11, bottle holder 1, pretensioning device; Insulating pull rod 14 is The multi-section rod body is composed of threaded connections, and a row of evenly spaced adjustment screw holes is provided on the insulating pull rod. The distance between the adjustment screw holes is the same as the height of the insulator porcelain bottle, so as to adapt to the maintenance work of insulator strings of different lengths;

[0023] Both the front clamp 5 and the rear clamp 2 are composed of two opposite clamping arms. The inner ends of the clamping arms of the front clamping tool 5 and the rear clamping tool 2 (the corresponding side ends of the two clamping arms) are provided with clamping grooves. The card slot is matched with the connecting hardware at both ends of the insulator string...

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Abstract

The invention relates to the technical field of power sector overhead power transmission line equipment maintenance, in particular to a tool for electrified replacement of a 500kV strain insulator string. The power transmission line 500kV strain insulator string is provided with many pieces and is high in weight, the difficulty in electrified replacement of the whole strain insulator string is high, the power failure influence range is wide, and the requirements of device state overhaul are not met. The tool comprises a front clamp, a rear clamp, pulleys, insulating pull rods, a wire tightening screw rod, a supporting bottle frame and a pre-tightening device. The front clamp and the rear clamp are a pair of oppositely arranged clamping arms and are connected through the two insulating pull rods and the wire tightening screw rod, a front clamping pulley and a rear clamping pulley are respectively fixed on the front clamp and the rear clamp, the supporting bottle frame is lifted under the insulating pull rods through the front clamping pulley and the rear clamping pulley, and the lower portion of the supporting bottle frame is hinged to the pre-tightening device. The tool is simple and reasonable in structure, high in mechanical strength, good in insulating performance, light in weight, safe and reliable to use, good in universality and convenient to operate, improves working efficiency and guarantees that power is supplied reliably.

Description

technical field [0001] The invention relates to the technical field of equipment maintenance equipment for overhead transmission lines in the electric power industry, in particular to a tool for live replacement of 500kV tension insulator strings. Background technique [0002] With the widespread application of 500kV transmission lines, most of the regional power grids in my country have formed a grid structure with 500kV power grids as the backbone network. In order to reduce the number and time of power outages of transmission lines, live work is often used for maintenance and repair; 500kV transmission lines have long wires, heavy weight, and long and heavy insulator strings, so it is very difficult to replace insulator strings during live work. The structure of live work tools Complex and bulky, especially the tension insulator strings, each string weighs 300kg, length is about 5m, and the tension of the wire is about 3-5t. Therefore, it is very difficult to replace the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G1/02
Inventor 马进王勇丁斌李安琪葛伟焦敏铭梁晓东
Owner STATE GRID CORP OF CHINA
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