Connection structure for solving bouncing of vacuum circuit breaker and design method

Abstract

The invention relates to a connection structure for solving bouncing of a vacuum circuit breaker. The connection structure is used for connecting an arc extinguishing chamber and a flange and comprises a connection unit and a buffer unit, wherein the connection unit comprises a connection bolt group for connecting an end part of the arc extinguishing chamber and the flange, the connection bolt group comprises a plurality of connection bolts and locking nuts, the plurality of connection bolts are arranged along the circumferential direction of the flange, the locking nuts are in one-to-one correspondence to the connection bolts, the connection bolts sequentially penetrate through the end part of the arc extinguishing chamber and the flange and then are locked by the locking nuts, the buffer unit comprises buffer springs, the buffer springs sleeve outer ends of the connection bolts in one-to-one correspondence, and two ends of each buffer spring respectively prop against the end part of the arc extinguishing chamber and an end part of the flange. The invention also relates to a design method of the connection structure. The connection structure has the advantages that the arc extinguishing chamber and the flange can move relative to each other and can reset by the effects of the buffer springs, and damage and breakage caused by rigid connection are prevented.

Description

technical field [0001] The invention relates to a circuit breaker, in particular to a connection structure for solving the problem of bouncing of a vacuum circuit breaker, and a design method for the connection structure of the vacuum circuit breaker. Background technique [0002] Vacuum interrupter, also known as vacuum switch tube, is the core component of medium and high voltage power switch. Its main function is to quickly extinguish the arc and suppress the current after the medium and high voltage circuit is cut off through the excellent insulation of the vacuum inside the tube, so as to avoid accidents and The occurrence of accidents is mainly used in the power transmission and distribution control system of electric power, and also used in power distribution systems such as metallurgy, mining, petroleum, chemical industry, railway, broadcasting, communication, and industrial high-frequency heating. It has the characteristics of energy saving, material saving, fire pr...

AI Technical Summary

Problems solved by technology

[0003] At present, for the circuit breakers in use in the market, the traditional method for the connection between the arc extinguishing chamber and the flange is a rigid connection, that is, a direct connection through bolts. When the gate is turned on, since the gap between the two contacts is small to large during the process from contact to separation of the contacts, under the action of high voltage, the insulating medium in the gap will be ionized and broken down to form an arc. After the arc is formed, a The heat will further aggravate the ionization of the medium, expand the arc, and make the circuit breaker unable to break the circuit. In order to prevent this process, when designing the circuit breaker, two contacts are installed in an arc extinguishing chamber. There are many arc extinguishing chambers. Channel, one is to divide the arc, and the other is to use the high-pressure airflow generated by the high temperature of the arc to blow out the arc through a certain channel nozzle in the arc extinguishing chamber

Therefore, using the above-mentioned connection method, it is easy to bounce and be hit during use, which will easily lead to damage and breakage of the connection between the arc extinguishing chamber and the flange after long-term use, affecting normal use.

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