The type and structure of the intake valve of the screw air compressor

The type and structure of the intake valve of the screw air compressor

Nowadays, people’s requirements for screw air compressors are getting higher and higher, and their performance will follow. From components to the whole machine, everyone wants to understand its use and how to maintain it. The following introduces the intake valve of screw air compressors. Some basic common sense:

　　1. Piston-type intake valve: Use the up and down movement of the piston in the intake valve of the air compressor to control the work of the air compressor.

When the air compressor is started, stopped and idling, the relief solenoid valve uses the air inlet to supply air to the piston to close the piston upward; when the air compressor is working at full load, the relief solenoid valve is energized to stop the discharge, and the piston chamber The exhaust port is discharged, the intake valve piston drops due to the difference in intake pressure, the intake valve is fully opened, and the air compressor works at full load; when the pressure reaches the set pressure upper limit, the discharge solenoid valve loses power and starts to discharge. And push the intake valve piston up, so that the intake valve is closed. At this time, the air compressor is in an empty state.

　　 The structure of the piston type air inlet valve is composed of an air inlet, a valve upper cover, a piston, a base, and a relief solenoid valve.

　　2. Butterfly-type intake control valve: When the screw air compressor starts, the intake valve is in the closed state to ensure that it starts without load. When the electric motor is running under heavy load, the three-phase solenoid valve is opened after being energized. The servo cylinder of the gas intake valve from this pushes the valve stem of the servo cylinder to drive the intake butterfly valve to fully open and start to reload. Load operation. The single pendulum check valve inside the butterfly intake control valve comes with a counterweight and a fluorine rubber sealing ring. When the screw air compressor is turned on, the main body of the screw air compressor sucks in. Due to the pressure difference, the check valve can be closed tightly in time and quickly , To ensure that there is no shutdown of spitting oil.

　　The opening and closing of the butterfly valve is manually controlled by the cylinder. According to the received pressure signal, the inverse proportional valve can control the depth of the piston rod of the cylinder. The butterfly valve opens or closes, thereby adjusting the air intake of the screw air compressor. The structure of the butterfly intake control valve is composed of a valve body, a single pendulum check valve, a butterfly valve and a servo cylinder.