Direct-acting circuit breaker

The invention provides a direct-acting circuit breaker, and belongs to the technical field of switch equipment. The direct-acting circuit breaker comprises a circuit breaker body and an operating mechanism directly installed on the circuit breaker body, an insulating pull rod is arranged in the circuit breaker body, an output shaft and an output inner crank arm installed on the output shaft are arranged in the operating mechanism, and a guide rod is connected between the output inner crank arm and the insulating pull rod. The guide rod penetrates through the circuit breaker body, and a sealing structure is arranged between the guide rod and the circuit breaker body. The circuit breaker body is directly connected with the operating mechanism, a connecting lever box and a transmission connecting lever are omitted, the structure and the installation process of the circuit breaker are simplified, and the manufacturing cost of GIS equipment is effectively reduced. The circuit breaker adopts a direct-acting sealing