Water hammer pump is an advanced water lifting device which is driven by running water and produces water hammer effect through mechanical action, and converts low-head energy into high-head energy.
Water hammer pump mainly consists of six parts: water inlet pipe, pump body, drain valve, central valve, pressure tank and water outlet pipe.
A pump that uses the energy generated when flowing water suddenly brakes to raise part of the water pressure to a certain height. The picture shows the working principle diagram of the water hammer pump. When the water flowing down the water inlet pipe reaches the one-way valve A (dead load valve), the impulse of the water flow (as long as the flow speed is large enough, there is enough impulse) makes the valve close quickly. When the water suddenly stops flowing, the kinetic energy of water is converted into pressure energy, so the pressure of water in the pipe rises, the one-way valve B opens, and some water enters the air chamber and rises to a certain height along the outlet pipe. Subsequently, due to the pressure reduction in the water inlet pipe, the valve A automatically falls under the static gravity and returns to the open state. At the same time, the compressed air in the air chamber urges the valve B to close, and the whole process is repeated. Using water hammer pump, the water flowing in the inlet pipe can be increased to about 15%, which is equivalent to 5 times of the drop of the inlet pipe. Efficiency of water hammer pump η = ε. Where is the ratio of the flow rate of pressurized water to the flow rate of working water flowing downwards; ε is the pressure rise height plus the ratio of the head loss in the outlet pipeline to the working water drop. Good water hammer pump efficiency can reach 86%. The installation inclination of the water inlet pipe is between 1:9 and 1:4, so as to make the water flow braking effect best. The water hammer pump has no moving working parts, and its structure is simple, and it does not need external power source or special person to take care of it. When designing a pump, the strength of pump components should be considered to avoid cracking due to water hammer.