Self priming pump according to the effect of the principle is divided into the following categories:
1. Gas-liquid mixing type (including internal and external mixing);
2. Water ring wheel;
3. Jet type (including liquid jet and gas jet).
Gas-liquid mixed type self-priming pump operation process: because the self-priming pump body of the special distribution, after the pump stops running, memory of the pump body has a certain amount of water, pump starts up again because of the effects of impeller rotation, inhalation pipe air and water are fully mixed, and is discharged into the gas water separation chamber, gas water separation chamber and the upper part of the gas overflow, the lower part of the water return impeller, re and suction pipe residual air mixed until the pump and suction tube gas fully discharged, the self-priming is completed, and the normal pumping. The water ring wheel type self priming pump is a water ring wheel and a water pump impeller in a shell body, and the gas is discharged by the water ring. When the pump is normal after the operation, can cut off the water through the valve and pump impeller ring round channel, and release the water within the liquid ring round. The jet type self suction pump is composed of a centrifugal pump and a jet pump (or injector), which is formed by the injection device, and a vacuum suction is formed at the nozzle.
