Airflow partition type arc extinguishing mechanism of power circuit breaker

Abstract

The invention belongs to the technical field of power circuit breakers, and particularly relates to an airflow partition type arc extinguishing mechanism of a power circuit breaker. The airflow partition type arc extinguishing mechanism comprises a cylinder, a push rod, an oscillating bar, an arc guide vane, an electric power fixed end, a toothed bar, a piston, a fixed shaft, an oscillating plate, a fixed plate and a gas outlet groove, wherein when arc is generated by the oscillating bar and the electric power fixed end, the arc arrives to the upper end of the oscillating plate; after the oscillating bar drives the oscillating plate to oscillate at an appointed position, a gap is maintained with the lower end of the fixed plate; the oscillating bar drives air compressed by the piston to enter into a main ventilation passage and a side ventilation pipe, and gas in the main ventilation passage flows to generate negative pressure at the position of the gap, so that air between the oscillating plate and the concave surface of the fixed plate flows into the main passage; gas in the side ventilation pipe flows upwards from the gas outlet groove through an airflow cavity, the arc is divided into three sections, and the divided arc sections enter into the main passage along with the flowing of air, so that the energy accumulation of the arc is reduced until the arc is extinguished. The arc is blocked by using airflow, and the arc is guided through the airflow, so that a preferable arc-extinguishing effect can be achieved.

Description

[0001] Technical field [0002] The invention belongs to the technical field of electric circuit breakers, and in particular relates to an airflow interruption type arc extinguishing mechanism of an electric circuit breaker. Background technique [0003] A power circuit breaker is a switch that protects the short circuit, overload and leakage of the circuit in the electric power. It can cut off the circuit when the circuit short circuit, overload and leakage occur. The circuit is connected or closed. A high-temperature and high-heat arc will be generated between the moving contact and the static contact. If the arc cannot be quickly exported and extinguished, it will ablate the contact point between the two contacts and cause serious damage to the power circuit breaker shell. Large damage, more importantly, the arc will delay the disconnection of the circuit, causing irreparable losses; Short circuit is very important. In order to further increase the extinguishing effect on...

AI Technical Summary

Problems solved by technology

[0003] A power circuit breaker is a switch that protects the short circuit, overload and leakage of the circuit in the electric power. It can cut off the circuit when the circuit short circuit, overload and leakage occur. The circuit is connected or closed. A high-temperature and high-heat arc will be generated between the moving contact and the static contact. If the arc cannot be exported quickly and extinguished, it will ablate the contact point between the two contacts and cause serious damage to the housing of the power circuit breaker. Large damage, more importantly, the arc will delay the disconnection of the circuit, causing irreparable losses; Short circuit is very important

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