What is the principle of self - priming pump? Ordinary centrifugal pump, if the suction surface of the impeller under the impeller, the start of water should be pre - irrigation, very inconvenient. Memory in order to pump water, inhalation of imported equipment required valve, pump work, valve caused great losses. The so-called self priming pump does not need to be irrigated before startup. After installation, it needs to be irrigated for the first time. After a short time operation, it can suck up the water and put it into normal operation by the action of the pump itself.
The self-priming pump is divided into the following categories according to the principle of action:
1. gas-liquid mixing type (including internal mixing type and outer mixing type);
2. water ring wheel;
3. jet type (including liquid jets and gas jets). The gas-liquid mixing type self-priming pump working process: the special structure of the self sucking pump, the pump stops after the pump body has a certain amount of water, the pump starts up again due to the rotation of the impeller and the suction pipe of the air and water are mixed, and is discharged to the gas water separation chamber, gas gas overflow water separation chamber at the upper part, the lower part of the water return to the suction line and the impeller, the remaining air mixture until the pump and the gas inhalation tube completely discharged, the self suction, and normal pumping. The water ring wheel type self-priming pump combines the water ring wheel and the pump impeller in a shell, and the gas is discharged with the aid of the water ring wheel to realize self absorption. When the pump is working normally, the water ring wheel and the pump impeller can be cut through the valve, and the liquid in the water ring wheel can be released. The jet type self-priming pump, composed of a centrifugal pump and a jet pump (or a jet), relies on a jet device to cause vacuum pumping at the nozzle.
1) suitable for urban environmental protection, building, fire fighting, chemical industry, pharmaceuticals, dyestuff, printing and dyeing, brewing, electricity, electroplating, papermaking, mining and washing, equipment cooling, etc.
2) it is a good machine for farm, nursery, orchard and vegetable garden when it is installed with a rocker type sprinkler, and water can be washed into the air.
3) it is suitable for clear water, seawater and chemical medium liquid with acid and alkalinity and paste with general paste (medium viscosity <100%, solid content up to 30% or less).
4) it can be used with any type and specification filter press, and the best matching pump for filter press when the slurry is sent to the filter press.
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