The basic structure and working principle of electric butterfly valve

The basic structure and working principle of electric butterfly valve

Electric butterfly valve is a modern fluid control device, widely used in pipeline, chemical, metallurgy, construction, environmental protection and other industries. It is composed of valve body, valve seat, valve plate, motor, reducer, limiter, controller, etc., simple and convenient operation, good internal sealing, long service life, with high precision, strong stability, and gradually replace the traditional manual and pneumatic butterfly valve.

1. Basic structure

1. Valve body: usually cast or forged method, including carbon steel, stainless steel, alloy steel, copper alloy and so on.

2. Valve seat: generally use rubber or polytetrafluoroethylene material, with good corrosion resistance, wear resistance, to ensure the sealing effect.

3. Valve plate: It is a key part of the valve, which can be rotated to adjust the medium flow rate and cut off the pipeline. The material is generally cast iron, ductile iron, stainless steel, etc.

4. Motor: to provide driving force for the disc, so that the valve open or close, according to different use needs can choose three-phase AC asynchronous motor, DC brush motor or brushless motor.

5. Reducer: play a role in slowing down, so that the output torque and speed reach the appropriate value, the material is generally steel or cast iron.

6. Limit device: limit the stroke of the valve to ensure the accuracy of the operating position of the valve, and can achieve automatic control under specific working conditions.

7. Controller: control the opening and closing of the actuator, abnormal signal feedback, etc.

Second, the working principle

The fluid control principle of the electric butterfly valve is to drive the reducer through the motor, and the gear drives the valve plate to rotate clockwise or counterclockwise, so as to change the flow rate of the pipeline medium, so as to adjust and cut off the pipeline. At the same time, the use of the internal limiter for stroke verification, to achieve accurate and reliable flow control purposes.

In the actual use process, according to different requirements to complete the port Settings and strictly select the quality of key components to ensure the reliability of the connection with the pipeline; It also needs to be noted that heavy objects should be avoided when installing the valve, which will seriously damage the normal service life of the valve. In addition, the use of electric butterfly valve should also pay attention to the preservation of the manual, timely maintenance, to avoid the mechanical properties of the valve degradation and leakage.

In short, the electric butterfly valve, as a highly automated flow control drive, can perfectly replace the traditional manual or pneumatic butterfly valve. It not only greatly reduces the cost of manual operation, but also improves the production efficiency, which is worth being widely used and is expected to play a greater advantage in a variety of fluid control fields in the future.