Intelligent electric pneumatic valve has PI regulating function adjustment

Intelligent electric regulating pneumatic valve is a kind of pressure balance type pneumatic valve, with RQM series intelligent electric actuators, the overall structure is compact, light weight, good stability, high protection grade, therefore widely used in large thermal power plants, chemical plants, water treatment and sewage disposal, gas, oil fields, steel mills such as automatic adjustment system.
when intelligent electric control pneumatic valve to accept transducer signal which can adjust the PI, microcomputer first compares the transducer signal with a given signal, and according to the preset law of PI parameters calculation, then send control signal to the actuator, and adjust, pneumatic valve until signal balance. PI regulating function is a low cost and good performance of sampling control system, and don't need to use the conventional PID controller, and directly to the transducer signal, analog continuous control system is not easy to do. Some industrial object lag time is very long, Such as control stove temperature) , this will cause big, slow, error of the system using a microcomputer sampling and to control, can raise the control performance of the low pass. Fixed flow characteristic when the intelligent electric adjusting flow curve correction, pneumatic valve, servo amplifier in the microcomputer, according to the preset parameters to signal is calculated, the input signal and the displacement of the pneumatic valve to achieve the required digital function relation, and nonlinear adjustments, this makes the choice of flow characteristics and is simple and easy to change, the more important for the control system. Using the pneumatic valve core to change shape or change the shape of CAM to change the flow characteristic of method appears behind. And angular travel like pneumatic valve, pneumatic valve, can't change the shape of the pneumatic valve core way to change the flow characteristic. Intelligent type actuator with can change this situation, because it is the intelligent type pneumatic valve.
intelligent electric control characteristics of pneumatic valve products
1, pneumatic valve body according to the fluid mechanics principle design of cross section, such as low flow resistance of fluid, rated flow coefficient is increased by 30%;
2, wide adjustable range, adjustable ratio of 50, inherent flow characteristics such as straight lines and percentage;
3, electric two-seater adjust unbalanced force small pneumatic valve, pneumatic valve has good stability, using the large pressure difference;
4, adjust the cutting type pneumatic valve core with soft sealing structure, not easy to leak;
5, electrical power regulating pneumatic valve can be directly controlled by the current signal of pneumatic valve opening, the servo amplifier;
6, bellows seal type pneumatic valve adjustment of mobile pneumatic valve stem form a good seal, closed fluid leakage.