Introduction to ZH Series Pneumatic Actuator Company Classification and Description of Pneumatic Actuator
Pneumatic actuator is an indispensable structure in industrial production automation process. Electric, pneumatic and hydraulic are the power of the actuator, but here mainly introduces the failure and maintenance management methods of the pneumatic actuator system. The analysis results are as follows.
Faults of the pneumatic actuator include blockage, leakage and combustion of the control coil. Here, we will briefly analyze the problems in the maintenance method according to these three basic conditions. The pneumatic actuator is stuck. Dismantle the engine, check the adhesion, analyze and reassemble. Check the pneumatic actuator and valve rod for air leakage and the sealing cover for damage. If it is damaged, it shall be replaced in time. If it directly affects the function of the element, it must be replaced, otherwise the seal damage will lead to leakage. Check the piston or impurities. The piston rings and lubricating parts can be replaced. The coil also has the problem of aging and deterioration, which can be judged with a multimeter after power on.
Pneumatic actuator is an actuator used to open, close or adjust the pneumatic drive valve. It is also called pneumatic actuator or pneumatic device, but it is usually called pneumatic head. The actuator and regulator of the pneumatic actuator are integrated, including diaphragm actuator, piston actuator, fork actuator and rack and pinion actuator. The piston type has a long stroke, so it is suitable for situations requiring large thrust. On the other hand, the diaphragm travel is very small and can only directly drive the valve stem. Fork type pneumatic actuator has the characteristics of large torque and small space. The torque curve matches the torque curve of the valve, but it is not beautiful. It is commonly used for high torque valves. The rack and pinion pneumatic actuator has the advantages of simple structure, stable and reliable operation, safety and explosion-proof. It is widely used in power plants, chemical industry, oil refining and other production processes with high safety requirements. Diaphragm pneumatic actuator: Diaphragm pneumatic actuator is commonly used and can be used as a general control valve driver to form a pneumatic diaphragm actuator. The diaphragm acts on the signal pressure P of the pneumatic diaphragm actuator to deform the diaphragm, drive the diaphragm push rod to move the valve core and change the valve opening. The utility model has the advantages of simple structure, low price, convenient maintenance, wide application range, etc.
There are two types of pneumatic actuators: direct acting and reverse acting. The signal pressure of the forward actuator is transmitted to the membrane gas chamber above the corrugated film, and the signal pressure of the reaction actuator is transmitted to the membrane gas chamber below the corrugated film. They can be modified by replacing individual components
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