Abstract: In this paper, a new type of water flow switch structure is designed, in which a protective sleeve is added to the target to prevent impurities from entering the water flow switch shell. At the same time, the anti-fatigue strength of the target can be increased by increasing the maximum chamfering Angle of the target and increasing the reinforcing bars on the target. Experiments show that the new water flow switch can effectively prevent impurities from entering and increase the fatigue strength of the target.

Key words: Water flow switch, Target slices, Impurities, Fatigue strength