Opening and closing device of vacuum arc-extinguishing chamber

Abstract

The invention aims to provide an opening and closing device of a vacuum arc-extinguishing chamber, which has the advantages of small size, high rigidity, high temperature resistance, aging prevention,ability of assisting heat dissipation and conductivity. The opening and closing device comprises a buffer upper cover, a buffer lower cover, springs, a metal pull rod and a fixing pin, wherein the springs are arranged between the buffer upper cover and the buffer lower cover in a pairwise manner, the upper end of the metal pull rod vertically and movably passes through the middle part of the buffer lower cover, the lower end of the metal pull rod is used for being connected with the arc-extinguishing chamber, the middle of the buffer upper cover is provided with a hollow part for the metal pull rod to pass through, and the fixing pin transversely passes through two side surfaces and the hollow part of the buffer upper cover and is hinged with the upper end of the metal pull rod.

Description

technical field [0001] The invention belongs to the technical field of electrical equipment, and in particular relates to an opening and closing device for a vacuum interrupter. Background technique [0002] Vacuum interrupters are widely used in my country's power system, and many domestic manufacturers are developing vacuum interrupters. However, the current opening and closing devices of the vacuum interrupter are all insulating pull rods, which are large in size, low in strength, poor in workmanship, not resistant to high temperature, easy to age, have no heat dissipation, and have no conductivity; the overtravel springs are all compression springs , the contact requirements of the high value of the vacuum interrupter make the size of the compression force spring large, and when the spring force is adjusted, it is necessary to replace a new spring with a different yield strength coefficient, thus causing a waste of resources. At the same time, the spring is exposed and a...

AI Technical Summary

Problems solved by technology

However, the current opening and closing devices of the vacuum interrupter are all insulating pull rods, which are large in size, low in strength, poor in workmanship, not resistant to high temperature, easy to age, have no heat dissipation, and have no conductivity; the overtravel springs are all compression springs , the contact requirements of the high value of the vacuum interrupter make the size of the compression force spring large, and when the spring force is adjusted, it is necessary to replace a new spring with a different yield strength coefficient, thus causing a waste of resources. At the same time, the spring is exposed and assembled on the insulating rod. There is no external sheath for heat dissipation, and it is susceptible to environmental factors and accelerates aging, resulting in poor appearance, unstable mechanical properties and short service life.

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