Describes the structure and working principle of vacuum pumping system

Vacuum coating equipment vacuum pumping system HC-- high vacuum coating machine winding winding chamber by pumping unit and the composition of the coating chamber pumping unit.

Winding chamber pumping oil booster unit by 1, 2 Roots pump, a plunger pump station and a station consisting of rotary vane pump, oil booster pump as the main pump, in order to ensure that the reach of 10-1 Pa greater pumping rate work under pressure;

Coating chamber pumping unit by 1 oil diffusion pump, a Roots pumping station, a station rotary piston pump and a rotary vane pump station composed of oil diffusion pump as the main pump, in order to ensure the required evaporation Lvsi 10-2 Pa vacuum.

Vacuum pumping system consists of a programmable PLC centralized control, to operate on the LCD touch screen is divided into automatic and manual control modes. Normal operational use automatic mode, PLC will be based on the value of the vacuum in the vacuum gauge levels set for each vacuum pump start or stop, open or close the valve for automatic control and other functions. Manual control mode is mainly used for debugging and maintenance, can open and close each individual pump and valve operation.

Road tube valves are pneumatically controlled valve and solenoid valve to control the use of their open or closed, the cylinder with the valve position signal has a switch for easy control system for monitoring the implementation of the state of the valve.

Mounted on the connecting pipe vacuum pumps and rotary piston pump inflatable pneumatic valves, rotary piston pump for filling the air with the pump chamber of the stop, the opening and closing movements and rotary piston pump linkage, controlled by a programmable PLC its time lag or advance.

Coating chamber is equipped with a pneumatic valve on the suction side of the bleed valve, before winding the car exits the vacuum chamber filled with the atmosphere of the end for winding its opening action and duration controlled by a programmable PLC.

Each equipped with a vacuum tube aisle seat regulatory measure to provide a programmable PLC and the required vacuum gauge vacuum pressure signals, while providing convenience for maintenance, testing pressure vacuum system to the pipeline.