The
cavitation jet flow self-cleaning non-negative pressure
water supply system comprises a water tank, a water inlet
pipe and a water outlet
pipe are inserted into the side wall of the water tank in a penetrating mode, a blow-off
pipe is inserted into the bottom of the water tank in a penetrating mode, and a water supplementing pipe communicated with the water inlet pipe is inserted into the upper end of the water tank in a penetrating mode; a sliding sleeve is connected to the inner wall of the water supplementing pipe through a
suspension spring, a rotating box is rotationally connected to the side wall of the lower portion of the sliding sleeve in a sealed mode, a rotating water spraying mechanism is arranged in the rotating box, and a
hydraulic cylinder is fixed to the upper end of the water tank. The self-cleaning device has the advantages that the whole self-cleaning process is carried out only when the
water supply pressure is sufficient, the cleaning action is not triggered if the
water supply pressure is insufficient, a
water source in the water tank is ensured to be used for supplying water,
water flow sprayed by the spray head cannot clean the inner wall of the water tank when the water supply pressure is insufficient, water supply is preferentially carried out, and then cleaning is carried out; and shutdown operation is not needed, and online descaling can be achieved.