Do you know the classification of self-priming sewage pump

Sewage pump is a kind of pump product which is connected with pump and motor and works underwater at the same time. Compared with general horizontal pump or vertical sewage pump, sewage pump has compact structure and small floor area. The installation and maintenance are convenient. Large sewage pumps are generally equipped with automatic coupling devices, which can be installed automatically. The installation and maintenance are quite convenient.
According to different sewage discharge modes, sewage pumps can be divided into Self-priming sewage pump, submerged sewage pump, knife type sewage pump and automatic mixing sewage pump. The vertical sewage pump adopts a unique single blade or double blade impeller structure, which greatly improves the sewage passing capacity, and can effectively pass through the fiber material 5 times the diameter of the pump and the solid particles with a diameter of about 50% of the diameter of the pump. The vertical sewage pump, which can be moved or fixed, is used for the sewage, suction and discharge in construction, farmland drainage and irrigation, enterprises and institutions. In addition to conveying sewage, it is also suitable for drainage pump, pulp pump, irrigation, etc.
However, the self-priming sewage pump can also be classified according to the action principle, which can be divided into the following categories:
1. Gas liquid mixing type (including internal mixing type and external mixing type)
Working process of gas-liquid mixed Self-priming sewage pump: due to the special structure of the pump body of the self-priming sewage pump, there is a certain amount of water in the pump body after the pump stops running. After the pump is started again, due to the rotation of the impeller, the air and water in the suction pipeline are fully mixed and discharged to the gas-water separation chamber. The gas in the upper part of the gas-water separation chamber overflows and the water in the lower part returns to the impeller, Re mix with the remaining air in the suction pipeline until all the gas in the pump and suction pipe is discharged, complete self suction and pump water normally.
2. Water ring wheel type
The water ring wheel type self-priming sewage pump combines the water ring wheel and the water pump impeller in a shell to discharge the gas with the help of the water ring wheel to realize self-priming. When the pump works normally, the passage between the water ring wheel and the pump impeller can be cut off through the valve, and the liquid in the water ring wheel can be discharged.
3. Jet type (including liquid jet and gas jet)
The jet type self-priming sewage pump is composed of a centrifugal pump and a jet pump (or ejector). It relies on the injection device to create a vacuum at the nozzle to realize suction.

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