The invention relates to an energy-saving environment-friendly multiple-stage
centrifugal pump. The energy-saving environment-friendly multiple-stage
centrifugal pump comprises a rack, a pump body, amotor and a
water pipe. A first
turbine is connected into the
water pipe in a rotary manner. A first
cam is connected to the
water pipe in a rotary manner. The first
turbine is coaxially connected with the first
cam. The rack is provided with an inflator. A
piston is connected into the inflator in a sliding manner and provided with a ventilating hole. A seal plate is hinged to the portion, at theposition of the ventilating hole, of the
piston. A
piston rod is fixed to the piston. The first
cam abuts against the
piston rod. The inflator communicates with an air bag. An air jetting
pipe is arranged at the position, at one side of the motor, on the rack, wherein air is jetted to the motor through the air jetting
pipe. A communicating
pipe is arranged between the air bag and the air jetting pipe in a communicating manner and provided with a valve. The rack is further provided with a switching-on / off mechanism used for switching on and switching off the valve. Compared with the prior art,according to the energy-saving environment-friendly multiple-stage
centrifugal pump, water in the water pipe flows to drive the inflator to inflate the air bag, the valve is switched on and switched off intermittently through the switching-on / off mechanism, and the good motor heat dissipation effect is achieved;
electric energy does not need to be consumed; and the
energy conservation and environment protection purposes are achieved.