Special tool for disassembling and assembling static contact spring of disconnecting switch

Abstract

The invention discloses a special tool for disassembling and assembling a static contact spring of a disconnecting switch. The special tool comprises a motion arm, a front hook and a pressing block, wherein the rear end of the front hook is hinged on the front end of the motion arm, and a hook point on the front end of the front hook is inwards formed; the upper end of the pressing block is hinged on the front part of the motion arm, and the middle part of the lower end plane is outwards protruded to form a rectangular boss. The width of the boss is equal to a distance between two adjacent contact fingers on the static contact of the isolating switch. According to the special tool for disassembling and assembling the static contact spring of the disconnecting switch provided by the invention through a lever principle, a worker can save more energy while performing the work and finishing the work independently, and the working time is short, most importantly, the tensile strength on the spring by the special tool is smaller, and the fatigue deformation of the spring cannot easily be caused by the excessive deformation of the spring.

Description

technical field [0001] The invention belongs to the technical field of electric power maintenance tools, in particular to a special tool for disassembling and assembling a static contact spring of a disconnector switch. Background technique [0002] In the power system, when it is necessary to overhaul the high-voltage disconnector such as GW7-220 / 1250A, one of the contents is to disassemble and overhaul its static contacts. figure 1 and figure 2 The side view and top view of this static contact structure are respectively. like figure 1 and figure 2 As shown, this static contact mainly includes a support frame 1, a plurality of contact fingers 2, a spring 3 and a cylindrical pin 4; wherein the support frame 1 is a rectangular parallelepiped box structure with openings at both ends, and a plurality of contact fingers 2 are arranged side by side at a distance It is arranged on both sides of the support frame 1; the middle part of the spring 3 is located inside the suppor...

AI Technical Summary

Problems solved by technology

Since there is no special tool for disassembling the spring 3 at present, the usual method is to use a steel wire to elongate the spring 3 forcefully. However, in order to ensure that the contact finger 2 has sufficient clamping force, a spring 3 with a relatively large compression force is usually selected. , so at this time it is necessary for a staff member to use a large force to stretch the spring 3, but this is easy to cause fatigue deformation of the spring 3 due to excessive stretching, thereby weakening the clamping force of the contact finger 2

During operation, if there is a gap between the contact finger 2 and the moving contact due to insufficient clamping force, overheating will easily occur, which will not only affect the service life of the equipment, but also affect the stable operation of the power system. kind of hazard

In addition, this work needs to be completed by two staff members, and it is very laborious, so the work efficiency is relatively low

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