Interrupter assembly and porcelain knob-type sulphur hexafluoride circuit breaker

The invention provides an interrupter assembly and a porcelain knob-type sulphur hexafluoride circuit breaker. The interrupter assembly comprises more than two interrupter monomers; each interrupter monomer comprises a moving support arranged at the head end and a static support arranged at the tail end; a moving contact is assembled in a guiding and sliding mode on the moving support; the static support is fixedly provided with a static contact coaxially opposite to the moving contact; the interrupter monomers are in end-to-end serial connection on the same axis; the moving contact of one interrupter monomer of each adjacent two interrupter monomers is in transmission connection with an insulated connection piece in transmission connection with the moving contact of the other interrupter monomer; and the static support at the tail end of the former interrupter monomer of each adjacent two interrupter monomers is in conductive connection with the moving support of the other interrupter monomer connected onto the tail end of the interrupter monomer. Synchronous opening and closing can be carried out when the interrupter assembly is used, and the voltage grade borne by the interrupter of the circuit breaker can be greatly improved.