Self-energy dual-acting arc extinguishing chamber

Abstract

The invention relates to a self-energy dual-acting arc extinguishing chamber, and belongs to the technical field of a high-voltage switch. The automatic arc extinguishing chamber comprises a movable end part and a static end part, wherein the movable end part comprises a movable end pull rod, an air cylinder, an expansion chamber and an auxiliary nozzle, the static end part comprises a static arccontact, an arc extinguishing nozzle and a connection rod structure, the auxiliary nozzle is fixedly connected with the arc extinguishing nozzle, the static arc contact can be driven to achieve equal-speed deviation motion during the motion process of the movable end pull rod, the static arc contact is provided with a piston, an outer wall of the piston is matched with an inner wall profile of thearc extinguishing nozzle, a gap is formed between the outer wall of the piston and the inner wall profile, an air guide passage is formed in the static arc contact and communicates with a surface ofthe piston from an axis, high-voltage gas generated by an arc flows into an enclosed region formed between the piston and the arc extinguishing nozzle through the air guide passage, and the capacity of the expansion chamber is equivalently expanded. The self-energy dual-acting arc extinguishing chamber is provided with the air cylinder, the expansion chamber and an auxiliary piston, a three-air chamber structure is formed during the breaking process, the arc extinguishing speed is rapid, and an effect is good.

Description

technical field [0001] The invention belongs to the technical field of high-voltage switches, and in particular relates to a self-energy double-action interrupter. Background technique [0002] SF since 1920 6 Since the discovery of the excellent insulating properties of the gas, it has been widely used in the high-voltage field. In 1953, the Westinghouse Company of the United States took the lead in introducing SF 6 Gas is used in circuit breakers, following the arc extinguishing principle of high-pressure air circuit breakers, a double-compressed gas type SF is developed 6 breaker. With the SF 6 With the gradual understanding of gas properties, the dual-pressure arc extinguishing method was quickly replaced by the single-pressure type, resulting in the single-pressure SF 6 breaker. This circuit breaker is simple in structure, small in size and low in cost. After long-term use and further improvement, its reliability is greatly improved. However, single-pressure SF 6...

AI Technical Summary

Problems solved by technology

However, single-pressure SF 6 The circuit breaker needs to provide a lot of operating work during the short-circuit current breaking process, so a hydraulic operating mechanism or a pneumatic operating mechanism with a large operating work must be used.

Images