Water-storage tank cleaning apparatus

A water-storage tank cleaning apparatus wherein a pivoting axle equipped with inlet passages is mounted to a drain vent disposed at the bottom of a water tank to fluidly connect to a drainpipe;

• the pivoting axle has a freely-rotatable movement element mounted thereto, and the movement element has multiple suction tubes annularly extending at the outer periphery thereon to fluidly connect to the inlet passages of the pivoting axle respectively;
• besides, the suction tube has multiple suction orifices drilled at one side thereon;
• the drainpipe also has the appropriate position equipped with a water-control valve that is switched periodically on and off via an IC control panel and set to multi-staged and intermittent draining cycles in an automatic or manual operation;
• therefore, when the water-control valve is rapidly shut off in seconds, the hydrodynamics is utilized to cause the rotation of the suction tubes so that the mud deposited at the bottom of the water tank can be disturbed to float upwards;
• then, the disturbed mud can be immediately carried off and discharged outwards there-from when the water-control valve is reopened for drainage thereof;
• therefore, depending on the periodical on/off switch of the water-control valve, the suction tubes are naturally actuated to revolve in intermittent rotation for stirring up the mud deposited at the bottom of the water tank rather than to spin in rapid rotation;
• whereby, fresh running water can still be transported outwards via a higher water supply pipe without being interrupted by the cleaning process thereof, and the water supply for users can be kept to run in a normal state without being completely drained off for the cleaning as found in the conventional water cleaning apparatus, economically saving the precious water resource thereby.