Pumping system of printing machine

The utility model provides a pumping system of printing machine, including the gas holder, the gas - water separation water tank, vacuum pump mechanism and electrically controlled device, be equipped with an overflow mouth on the lateral wall of gas - water separation water tank, the top is equipped with a moisturizing pipe, still be equipped with a liquid -level sensor in the gas - water separation water tank, vacuum pump mechanism includes first vacuum pump and second vacuum pump, electrically controlled device includes power and PLC controller, the gas holder, first vacuum pump and gas - water separation water tank loop through the pipe connection, liquid -level sensor, vacuum pump mechanism is passing signal line and the hookup of PLC controller respectively. The utility model discloses still be equipped with heat abstractor, the utility model discloses an automatic adding water is realized to liquid -level sensor monitoring gas - water separation water tank water level to can adopt the heat dissipation of cooling water interchanger to reduce the temperature, reduce the cavitation erosion of vacuum pump blade, adopt the PLC controller, realize that one division one 2 pump of atmospheric pressure automatic setting is equipped with control, thereby effective the reduction maintained cost reduction and induced draft the fault rate effectively.