Actuator for control valve and control mechanism

The utility model discloses an actuator for a control valve and a control mechanism, and belongs to the technical field of actuators. The actuator for the control valve comprises a first valve body, a valve set, a medium conveying path and a fireproof cover, the first valve body and the valve set are both arranged in the fireproof cover, the medium conveying path penetrates through the fireproof cover, the first end of the medium conveying path is used for being connected with an air source, and the second end of the medium conveying path is used for being connected with the control valve; the first valve body is arranged on the medium conveying path to control on-off of the medium conveying path, and the valve set is connected with the first valve body to control opening and closing of the first valve body. The fireproof cover is provided with a first opening, the first opening is used for exposing at least one of the first valve body and the valve set, the fireproof cover is movably connected with a first d