How to make a centrifugal pump automatically draw water?

Use the engine exhaust to draw vacuum and fill water method remove the silencer of the small engine, install a special exhaust water device, use the exhaust gas discharged by the engine during operation to draw away the air in the pump, so the pump produces a certain vacuum. When operating, start the engine first, then press the handle of the exhaust water device down to close the exhaust port, and the exhaust gas discharged the engine is discharged through the exhaust nozzle. Due to the large flow rate and low pressure of the exhaust gas jet, it produces a suction effect. When you see a stream of air and water bubbles appear, the pump begins to draw water. Then close the water filling and exhaust hole on the pump body, and immediately lift the handle to open the port, and the pump will switch to normal operation. This method of filling water is more suitable for small-caliber water pumps with gasoline or diesel engines as power.

Selfpriming centrifugal pumps are a new type of agricultural water pump that has been designed, manufactured and promoted in recent years. It does not use a bottom valve. Before starting pour a small amount of water into the pump. At startup, it can automatically draw vacuum and draw water. After stopping the machine, there is no need to fill water again for next startup. It is very convenient to use. In recent years, SS-type self-priming centrifugal pumps developed in our province are available in 2, , and 4-inch sizes and are suitable for orchards and farmland irrigation. In order to develop sprinkler irrigation technology, China has jointly designed and produced six specifications self-priming sprinkler irrigation pump series products. This type of pump can not only be used in agriculture but also plays a very high role in construction sites and other fields.

The water tank in front of the centrifugal pump is installed in front of the water pump, and a cylindrical water tank is installed, with a hemispherical protrusion the top of the tank, and a suction pipe is installed in the middle of the tank, with its pipe mouth lower than the height of the cylinder. The lower outlet of tank is connected to the water suction pipe of the pump. Before the next use of the water tank, fill the water tank with water from the water filling port, and then the water filling port. Start the water pump running, and the water pump will instantly draw away the water in the water tank, the water level gradually drops, the volume gradually increases and a vacuum state is formed, which produces suction, so that the water from the water suction pool is sucked into the water tank, and the centrifugal pump continues to operate, and the water is continuously drawn out.