Working principle and operation method of pneumatic valve
Pneumatic valve is a kind of hardware pneumatic valve with the help of air compression to control the valve, its appearance greatly facilitates the engineering work of related industries, but also saves a lot of energy costs for enterprises.
Useful to the pneumatic valve enterprise staff must understand its working principle, as well as the correct method of operation, in order to accurately carry out the operation.
Pneumatic piston actuator USES compressed air as power source, through the movement of the piston to drive the arm for 90 degrees of rotation, to make the valve automatically open and close.
Its components are: adjusting bolts, actuator box, curved arm, cylinder block, cylinder shaft, piston, connecting rod, universal shaft.
Working principle of pneumatic control valve: pneumatic control valve is composed of the executive body and the regulating body.
The actuator is the thrust part of the regulating valve. It produces the corresponding thrust according to the pressure of the control signal and pushes the regulating mechanism to move.
The valve body is the pneumatic control valve regulating parts, it directly with the regulating medium contact, regulate the flow of the fluid.
Pneumatic valve operation when the opening and closing direction, all should be closed clockwise.
As a result of the network of pneumatic valves, often artificial open and close, open and close revolutions should not be too much, that is, large diameter valves should also be in 200-600 revolutions.
In order to facilitate the opening and closing operation of one person, the maximum opening and closing torque should be 240N-m under the condition of plumber's pressure.
The operating end of pneumatic valve shall be square tenon, standardized in size and facing the ground so that people can operate directly from the ground.
Valves with roulette wheels are not suitable for underground piping.
Display panel of opening and closing degree of pneumatic valve:
(1) pneumatic valve opening and closing degree of the scale, should be cast in the gearbox cover or change direction after the display plate on the shell, all face to the ground, the scale brush on the phosphor, to show eye-catching;
(2) indicator dial needle material in good management of the available stainless steel plate, otherwise for paint steel plate, do not use aluminum;
(3) indicating disc needle eye-catching, fixed firm, once the opening and closing adjustment is accurate, should be locked with the rivet.
If the pneumatic valve is buried deep, the operating mechanism and display plate should be equipped with an extension rod when the distance from the ground is ≥1.5m, and fixed firmly, so that people can observe and operate from the ground.
That is to say, the valve in the pipe network open and close operation, not down the well.