361 valve and high-low bypass valve pneumatic control system for thermal power station

The utility model relates to a 361 valve and high-low bypass valve pneumatic control system for a thermal power station. A position detection device for detecting the actual opening and closing degree of a pneumatic executer is arranged on the pneumatic executer, and in addition, two control branches in mutually parallel connection are arranged between a system air inlet and the pneumatic executer, wherein a switch electromagnetic valve for controlling the pneumatic executer to operate is arranged the first control branch, a pressure reducing valve, a switching electromagnetic valve, a positioning device and a flow rate amplifier are serially connected onto the second control branch, and the positioning device is used for precisely regulating the pneumatic executer. The 361 valve and high-low bypass valve pneumatic control system for the thermal power station has the advantages that the original control principle and the system are modified, so the equipment control precision is effectively improved, the pote