What are the Types of Electric Devices?
- KEPLER TEAM
- Dec 13, 2021
- 2 min read
At present, there are many types of explosion-proof valve electric devices on the market, and the common ones are the following types:
Angle stroke valve electric device, straight stroke valve electric device, electric control valve, PID electric control actuator and solenoid valve. The first four belong to the DDZ type. The following briefly introduces the linear stroke valve electric device (DKJ) and the quarter stroke valve electric device (DKZ).
Design requirements for electric devices of explosion-proof valves
The function of the linear and quarter-stroke explosion-proof valve electric device is to receive the standard value galvanic signal of 0~10, 4~20 mA or 1~5 volts from the regulator or other instruments, and it will become a displacement after the actuator Thrust or corner torque is used to operate switches, valves, etc., to complete the task of automatic adjustment. These two types of actuators were previously composed of servo amplifiers and actuators. Nowadays, the structure, working principle and use method of organic-electric integrated intelligent structure are similar. The only difference is that one output displacement (thrust) and one output rotation angle (torque).
Explosion-proof valve electric device is also called electric actuator. It is a driving device that can provide linear or rotary motion, it uses a certain driving energy and works under the action of a certain control signal.
The main disadvantages of the explosion-proof valve electric device are:
The structure is more complex and more prone to failure, and because of its complexity, the technical requirements for field maintenance personnel are relatively higher; the motor runs to generate heat, if the adjustment is too frequent, it is easy to cause the motor to overheat and generate thermal protection. At the same time It will also increase the wear on the reduction gear; in addition, the operation is slower. It takes a long time from the output of a signal from the regulator to the movement of the regulating valve to the corresponding position in response. This is because the explosion-proof valve electric device is not as good as the pneumatic, Place for hydraulic actuator.
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