The diesel driven pump integrates self-priming and non-clogging sewage. It adopts the axial backflow external mixing type, and through the unique design of the pump body and the impeller flow path, the diesel driven pump can be installed like a self-priming clean water pump without the need to install bottom valves and tanks. Diversion of water and suction and discharge of liquids containing large particles of solids and long-fiber impurities are ideal diesel pumps for municipal sewage, flood control, drought relief, mountain farmland irrigation, and river channel pumping.
There are many types of diesel pumps. Among them, the external mixing type, on the other hand, the water discharged by the impeller into the gas-water separation chamber flows back to the outer edge of the impeller through the left and right return water holes. Under the action of pressure difference and gravity, the water flowing back from the left return hole is shot into the impeller channel and crushed by the impeller. After mixing with the air from the suction pipe, it is thrown to the volute and the vacuum pump is metered by the submerged pump. Pump gear pump corrosion-resistant pump acid-resistant pump fire pump flows in the direction of rotation. Then it merges with the water from the right return hole and flows along the volute. Because the liquid of the diesel driven pump continuously impinges on the cascade in the volute and is crushed by the impeller, it is vigorously stirred and mixed with the air to form a gas-water mixture, and continuously flows so that the gas and water cannot be separated. The mixture was peeled off by the tongue at the outlet of the volute and entered the separation chamber along the short tube. The air in the separation chamber is separated and discharged by the outlet pipe, and the water still flows to the outer edge of the impeller through the left and right return water holes, and is mixed with the air in the suction pipe. Such repeated circulation gradually exhausts the air in the suction pipe, so that the water enters the pump and completes the self-priming process.
Internally mixed diesel driven pumps have the same working principle as externally mixed self-priming pumps. The difference between diesel pumps is that the return water does not flow to the outer edge of the impeller, but to the inlet of the impeller. When the internal-mixing self-priming pump is started, the return valve at the front and bottom of the impeller must be opened to return the liquid in the pump to the inlet of the impeller. Under the action of high-speed rotation of the impeller, the water is mixed with the air from the suction pipe to form a gas-water mixture and discharged to the separation chamber. Here the air is discharged and the water returns from the return valve to the impeller inlet. This is repeated until the air is exhausted and water is absorbed.