The structure of the self-priming pump

There are many types of self-priming pumps, including molten salt pumps, vacuum pumps, submersible pumps, metering pumps, gear pumps, corrosion-resistant pumps, acid-resistant pumps, and fire pumps. The water flows in the direction of rotation. Then it merges with the water flowing from the right return hole and flows along the volute. As the liquid continuously impacts the blades in the volute and is continuously crushed by the impeller, it is strongly stirred and mixed with the air to form a gas-water mixture, which continuously flows so that the gas and water cannot be separated. The mixture is peeled off by the tongue at the outlet of the volute and enters the separation chamber along the short pipe. In the separation chamber, the air is separated and discharged by the outlet pipe, while the water still flows to the outer edge of the impeller through the left and right return holes and mixes with the air in the suction pipe. This cycle is repeated, gradually exhausting the air in the suction pipeline, allowing water to enter the pump, and completing the self-priming process. The sewage pump, self-priming pump, oil pump, diaphragm pump, screw pump, and gear oil pump are the same, the only difference is that the return water does not flow to the outer edge of the impeller, but to the impeller inlet. When starting the internal mixing self-priming pump, the reflux valve at the lower front of the impeller must be opened to allow the liquid in the pump to flow back to the impeller inlet. Under the action of the high-speed rotation of the impeller, the water mixes with the air from the suction pipe to form an air-water mixture and is discharged to the separation chamber. Here the air is discharged and the water returns to the impeller inlet from the reflux valve. This process is repeated until the air is exhausted and the water is sucked in. The working principle of the internal mixing self-priming pump is the same as that of the external mixing self-priming pump. Jiangsu Shuanglun Pump Industry Machinery Manufacturing Co., Ltd. is a brand-new technology development-oriented limited company restructured from the former "Jingjiang Shuanglun Water Pump Factory". Founded in 1993, the company specializes in the production of various types of water pumps, especially the "Sulun" brand WFB series sealless self-priming pumps. The production capacity and scale are at the domestic advanced level. It is one of the member units of the drafting of the national standard revision of the self-priming pump of the People's Republic of China.