A manufacturing method of pneumatic actuator for check valve
Check valve refers to the valve that automatically opens and closes according to the flow of the medium itself, and is used to prevent the backflow of the medium. It is also called check valve, check valve, backflow valve and back pressure valve. The check valve is an automatic valve, whose main function is to prevent backflow of medium, reverse rotation of pump and drive motor, and release of container medium. Pneumatic actuator is an actuator driven by air pressure or regulating valve, also called pneumatic actuator or pneumatic device, but generally called pneumatic head, sometimes equipped with certain auxiliary devices. The valve positioner and handwheel mechanism are commonly used. The function of the valve positioner is to improve the performance of the actuator by using the feedback principle, so that the actuator can achieve accurate positioning according to the control signal of the controller.
At present, there are many deficiencies in pneumatic actuators. For example, the control accuracy is poor, the sealing effect is poor, and the valve stem floating range cannot be adjusted.
The purpose of the utility model is that the check valve provides a pneumatic actuator to solve the problems of poor control accuracy, poor sealing effect, and inability to adjust the floating range of the valve stem.
To achieve the above purposes, the utility model provides the following technical solutions: a check valve pneumatic actuator, including an actuator body, a fixed cover is installed on the top of the actuator body, two sides of the fixed cover are installed with adjustment handles, a piston cover is installed inside the fixed cover, one end of the piston cover is installed with a connector, one end of the connector is installed with a connector, and one end of the connector is installed with a pointer, The indicator rod is installed at the top of the piston rod, the piston rod plate is installed at the top of the piston rod, the lower piston plate is installed at the top of the piston rod, the middle fixed plate is installed in the middle of the actuator body, the air inlet is installed at one end of the middle fixed plate, and the second air inlet is installed at the other end of the middle fixed plate. The solenoid valve is installed at one side of the actuator body, the filter is installed at one side of the solenoid valve, the lower end cover is installed at the bottom of the actuator body, the valve rod is installed at the bottom of the piston rod, the valve plate is installed at one end of the valve rod, and the valve body is installed at the bottom of the actuator body.
Working principle: when using the equipment, the air source is supplied to the filter 18 through the air tank, the air source is transmitted to the solenoid valve 17 through the filter 18, the gas is transmitted to the second air inlet 16 through the solenoid valve 17, and the gas is transmitted to the middle fixed plate 15 and the upper piston plate 14 through the second air inlet 16, so that the gas controls the upper piston plate 14, thus driving the piston rod 5 liters. The valve rod 19 is driven to rise by the piston rod 5, the valve plate 9 is opened by the valve rod 19, the control valve is opened, and the gas is delivered to the air inlet at 6 o'clock. The gas is transmitted between the middle fixed plate 15 and the lower piston plate 7 through the air inlet 6. The lower piston plate 7 drops. The lower piston plate 7 drives the piston rod 5 to drop. The piston rod 5 controls the valve rod 19 to drop. The valve closes the valve plate 9 through the valve rod 19.
