Fireproof valve actuator

The fireproof valve actuator comprises a shell, a bottom plate is arranged in the shell, a main shaft is arranged on the bottom plate in a penetrating mode, the end of the main shaft is connected with a first driving device, the output end of the first driving device is connected with a reduction gear set, and the main shaft is coaxially connected with a limiting piece; the main shaft is coaxially and fixedly connected with a hook cam, the two sides of the hook cam are provided with a second driving device and a first hook correspondingly, the motor rotation control device is additionally arranged, the motor is controlled to be delayed for a certain time when switching forward and reverse rotation, and the time can be adjusted according to actual requirements; therefore, product part errors or product assembly accumulative errors can be ignored, a time difference is artificially made between the interlocking action of the first hook and the second hook and the reset action of the driving gear, and the situati