The flameproof electric device series consists of a motor, a reducer, a torque controller, a stroke controller, an opening indicator, a hand-electric switching mechanism, a hand wheel and an electric part, and adopts a round mouth, an O-ring seal, and a partition. Explosive surface structure, explosion-proof junction box and special valve motor with coal safety certificate. Its specific components are as follows:

Motor: A special motor for valves with coal safety.

Reducer: It consists of a pair of spur gears and worm gear pairs. The power of the motor is transmitted to the output shaft via the reducer.

Torque controller: a full range of common components. When a certain torque is applied to the output shaft, the worm generates an axial displacement in addition to the rotation, which drives the crank to cause angular displacement of the collision block, thereby touching the micro switch. When the torque on the output shaft increases to the setting torque, until the micro switch operates, the motor power is cut off, and the motor is stopped, thereby realizing the control of the output torque of the electric actuator to achieve the purpose of protecting the electric valve.

Stroke controller: It adopts the decimal counter principle and has high control precision. It is a full range of common components. The working principle is as follows: a pair of large and small bevel gears in the reduction gear box drive the driving pinion (Z=8), and then drive the stroke controller to work. If the stroke controller has been adjusted according to the position where the valve is opened and closed, when the controller rotates to the pre-adjusted position (number of turns) with the output shaft, the cam will rotate 90°, forcing the micro switch to operate and cutting off the motor power. , the motor is stopped, so as to control the electric actuator stroke (number of revolutions).