What is the difference between the work of a self-priming pump and a deep well pump?

What is the difference between the work of a self-priming pump and a deep well pump?

Ordinary centrifugal pump, if the suction liquid level is under the impeller, it should be pre-filled when starting, which is very inconvenient. In order to store water in the pump, the inlet of the suction pipe requires a bottom valve. When the pump is working, the bottom valve causes a large hydraulic loss. The so-called self-priming pump does not need to be filled before starting (the first time after installation, it still needs watering). After a short time of operation, the pump itself can suck up the water and put it into normal work. Self-priming pumps are classified according to their principle of action: gas-liquid hybrid (including internal and external mixing), water ring and jet (including liquid jet)

And gas jets) three categories.

Working process of gas-liquid hybrid self-priming pump: Due to the special structure of the self-priming pump body, after the pump stops, there is a certain amount of water in the pump body. After the pump is started again, the air and water in the pipeline are sucked in due to the rotation of the impeller. Fully mixed and discharged to the gas-water separation chamber. The gas in the upper part of the gas-water separation chamber overflows. The lower water returns to the impeller and is re-mixed with the remaining air in the suction pipe until the gas in the pump and the suction pipe is completely excluded from the body. Suction, and normal pumping, the water ring wheel self-priming pump combines the water ring wheel and the impeller in a casing, and discharges the gas through the water ring to achieve self-priming. When the pump is working properly, the passage of the water ring wheel and the impeller can be cut through the valve and the liquid in the water ring can be drained. The jet self-priming pump is composed of a centrifugal pump and a jet pump (or an ejector). By means of the spraying device, a vacuum is created at the nozzle to achieve pumping.

Working principle of deep well pump: The vane pump that extracts water from the well is called deep: Among them, the long shaft deep well pump is a kind of pump pump well. The deep well pump consists of three parts: the top is the electric motor, and the middle of the ground is the water pipe and the lower end of the drive shaft is the work of the well pump { submerged below the well water surface. Due to the depth of the well, the head is required to be large, and the head range of the Changxuan pump is 15 to 17 meters. Deep well pumps are generally segmented mist centrifugal pumps. According to the structural characteristics of the deep well pump, it is very important to correct the failure of the deep well pump to ensure the safe operation of the deep well pump. Stainless steel multi-stage deep well pump belongs to the technical field of water pump

Take water from a deep well. The pump body and impeller are made of silica sol lost wax mold precision material is stainless steel. The structure comprises a pump body and an impeller in the pump body, the pump body and the impeller are respectively mounted on the shaft, the pump body and the shaft clearance are matched, the impeller and the shaft are fixedly matched with the pump bodies of the various stages, and the pump body is smoothly assembled into the shaft. The lower end of the water pump driven by the motor has a motor seat. When working, each set of pump body and impeller can have a lift of about 7 meters, multi-stage series, can meet some special needs, it has the characteristics of corrosion resistance, long life, high processing precision, etc.