Vacuum circuit breaker with air cushioning

Abstract

The invention relates to a vacuum circuit breaker with air cushioning, comprising an energy storage motor, an energy storage shaft, a closing release device, a closing spring, a tripping release device, a connecting rod, a lever and a mainshaft, wherein the output end of the energy storage motor is connected with the energy storage shaft through a transmission mechanism, the energy storage shaft is connected with one end of the closing spring, and the other end of the closing spring is connected with the mainshaft; the closing release device is arranged below the energy storage shaft and can drive a crank arm on the energy storage shaft to rotate when the energy storage shaft is rotated so that the crank arm is matched with the closing release device; the vacuum circuit breaker also comprises a tripping air-cushioning device which comprises a tripping spring, a piston rod, a piston and a cylinder, wherein one end of the piston rod is connected with the main shaft, the piston is positioned in the cylinder and fixed on the piston rod, and the tripping spring is positioned outside the cylinder and sleeved on the piston rod. The invention aims at providing the vacuum circuit breaker with air cushioning, which has more smooth and stable tripping characteristics.

Description

technical field [0001] The invention relates to a vacuum circuit breaker, in particular to a vacuum circuit breaker with air buffer which uses an air buffer device to improve the opening characteristics of the vacuum circuit breaker during the opening process of the circuit breaker. Background technique [0002] At present, vacuum circuit breakers generally use oil buffer devices, because the vacuum circuit breakers using oil buffer devices only play a role when the main shaft moves at a certain angle and reach the corresponding position. The opening characteristics of the vacuum circuit breaker of the oil buffer device are not smooth, which affects the smooth operation of the equipment; in addition, the oil is greatly affected by the environment, and the state of the oil will change when the temperature changes, such as high temperature in summer and high temperature in winter. When the temperature is low, the state of the oil changes relative to normal temperature, and thi...

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Problems solved by technology

[0002] At present, vacuum circuit breakers generally use oil buffer devices, because the vacuum circuit breakers using oil buffer devices only play a role when the main shaft moves at a certain angle and reach the corresponding position. The opening characteristics of the vacuum circuit breaker of the oil buffer device are not smooth, which affects the smooth operation of the equipment; in addition, the oil is greatly affected by the environment, and the state of the oil will change when the temperature changes, such as high temperature in summer and high temperature in winter. Low, the state of the oil changes relative to normal temperature, this change will definitely affect the characteristics of the oil buffer device, thus affecting the opening characteristics of the vacuum circuit breaker

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