Research on water hammer protection for a long-distance water supply system of a deep well pump group

This paper is based on the hydraulic characteristics of the multi-pump group, high head, and small flow of a long-distance water supply system in a deep well pump group. Fisrtly a calculation analysis model is established, and then a non-water hammer protection measure is carried out for its typical controlled working condition system. The pressure distribution characteristics of the water supply system reveal that the hydraulic transition process of the water supply system of the deep well pump group is even worse. Then, according to its hydraulic characteristics, a cost-effective water hammer protection measure-a one-way surge tank and air valve combined protection plan was selected. Finally, the calculation and analysis of the hydraulic transition process of setting the system one-way surge tank and air valve joint protection plan are carried out. The calculation results show that the one-way surge tank and air valve combined to protect water hammer have a good effect on this water supply system. It provides a new idea for the water hammer protection setting of the long-distance water supply system of the deep well pump group with high water head and small flow.