The working principle of the pneumatic valve
Using compressed air driven actuators in combination of multiple sets of pneumatic piston movement and force to beam and the characteristics of the curve track, drive tubular spindle rotation, compressed air disks to each cylinder, changed the direction of gas in and out of position to change the direction of spindle rotation, according to the load ( Valve) The requirements of rotary torque required, can adjust the cylinder number combination, driving load ( Valve) Work. Two five-way solenoid valve which is equipped with double-acting pneumatic actuators, two is two position control: open - , there are five tunnel ventilation, 45 is one connected with gas source, two external and double-acting cylinder chamber in and out of the port connection, two with the internal chamber in and out of the port in succession, you may refer to the working principle of concrete working principle of the double-acting pneumatic actuators. Because more and more control mode and means, in the actual industrial raw and industrial control, often used to control the pneumatic actuators method are many, there are several commonly used. Intelligent display is used to monitor the valve working condition and control the valve opening work of the instrument, it through two lines of position sensor to monitor the working state of the valve, the valve is in open valve or valve state, through programming records of valve switch Numbers, there are two road and valve opening and the corresponding 4 ~ 20 ma output and bipedal normally open normally closed contacts. Through these output signal, control the action of valve. Control system for the application of PLC in control system is more and more widely, because the solution is in OMRON PLC for the development of the above, so introduce by OMRON PLC. Hardware: computer, 1 set of PLC ( Including CPU, I/O module, ID212, OC224, AD003 module) , 2 relay, two solenoid valve, pneumatic valve actuator. General requirements 1, the production of pneumatic valve specifications and categories, should accord with the requirement of pipe design documents. 2, pneumatic valve type shall be marked according to gb code requirements. If the enterprise standards, should indicate the type of relevant specification. 3, pneumatic valve working pressure, the demand of pipe or work pressure, without affecting the price under the premise of the valve can withstand work pressure should be greater than pipeline of actual work; Pneumatic valve closed condition should be able to withstand any side 1. 1 times the working pressure of valve value without leakage; Open valve, the valve body shall be able to withstand 2 times the working pressure of valve requirements. 4, pneumatic valve manufacturing standards, should be according to gb code, if the enterprise standards, on the purchase order file should be attached to the enterprise.