Threaded nozzle for high voltage SF6 circuit breaker

A threaded nozzle for a high voltage SF6 circuit breaker is disclosed in the invention and relates to the field of power transmission and transformation equipment, including a large nozzle, a small nozzle and a moving-arc contact, the surface of the large nozzle, the small nozzle and the movable-arc contact is provide with a threaded area, the threaded area of the large nozzle is located on the surface of the port of a channel formed by the large nozzle and the small nozzle, the threaded area of the movable-arc contact is located on the end of the movable-arc contact close to the surface of the small nozzle, the threaded area of the small nozzle is located on the surface of the port of the channel formed by the small nozzle and the large nozzle and the surface of the small nozzle is closeto the end of the movable-arc contact. A threaded nozzle for a high voltage SF6 circuit breaker is provided for changing the shape of the nozzle and kneading in the small arc-extinguishing space, thegas flow is no longer a si