Nozzle connecting structure, arc extinguish chamber and circuit breaker

Abstract

The invention provides a nozzle connection structure, an arc extinguish chamber and a circuit breaker, the nozzle connection structure comprises a fixed seat, the fixed seat is internally provided with an assembly groove used for installing a convex ring at the front end of a nozzle, the assembly groove is U-shaped as a whole and comprises a semi-arc groove section and two straight groove sections, and a loading port is formed between the end parts of the two straight groove sections; each of the semi-arc groove section and the straight groove section comprises a first groove side wall in stop fit with the front side end surface of the convex ring, a second groove side wall in stop fit with the rear side end surface of the convex ring, and a groove bottom wall connected between the first groove side wall and the second groove side wall and in stop fit with the outer peripheral surface of the convex ring; the nozzle connecting structure further comprises a blocking piece which is fixedly connected with the fixing base and blocks the loading opening, and the blocking piece is provided with a first blocking wall matched with the peripheral face of the protruding ring in a blocking mode. According to the nozzle connecting structure, reliable connection of the nozzle can be achieved, the nozzle is prevented from loosening, the structure is simple, assembling is convenient, meanwhile, the production and manufacturing cost of parts can be reduced, the product assembling efficiency is improved, and the product reliability is high.

Description

technical field [0001] The invention relates to the technical field of high-voltage switchgear, in particular to a circuit breaker, an arc extinguishing chamber in the circuit breaker, and a spout connection structure in the arc extinguishing chamber. Background technique [0002] In the circuit breaker interrupter, there are generally two ways to assemble the nozzle. One is to install it directly on the moving contact through threaded connection. During use, the threaded connection is not only prone to loosening or even falling off, but also under severe force The nozzle is easy to break during the operation of the product, and the transmission reliability is low. [0003] Another spout connection structure disclosed in patent literature with application publication number CN105977073A and an arc extinguishing chamber and a circuit breaker using the structure, the spout connection structure includes a spout and a moving contact, and a guide ring is set outside the spout, an...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a spout connection structure to solve the problem that the existing spout connection structure easily causes the spout to loosen or even fall off; The connection structure easily leads to the problem that the nozzle is loose or even falls off; the purpose of the present invention is to provide a circuit breaker to solve the problem that the nozzle connection structure of the existing circuit breaker interrupter easily causes the nozzle to loosen or even fall off

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