Water leakage protecting device

A water leakage protecting device, comprising a ratchet, a pawl and an auxiliary floater, the ratchet being formed on an outer wall of a floater of a water inlet valve, the auxiliary floater having a floating cavity and a weight cavity therein, the weight cavity having a water drain hole at a bottom thereof, the auxiliary floater being coupled to the water inlet valve through a rotating shaft, the pawl corresponding in position to the ratchet and being connected to one side of the auxiliary floater close to the floater of the water inlet valve;

• wherein when the water inlet valve is activated for inflow of water, the auxiliary floater is pivoted upward through the rotating shaft by buoyancy and approaches the water container of the water inlet valve, the floater rises in the water container by buoyancy, and the pawl engages with the ratchet;
• wherein when the water is drained normally, the auxiliary floater is pivoted downward through the rotating shaft by gravity, the pawl disengages from the ratchet, and the water inlet valve starts inflow of water;
• wherein when a drain valve or other parts of a water tank of a toilet malfunctions to cause water leakage, the pawl engages with the ratchet to stop drop of the floater through cooperation of the ratchet and the pawl so as to stop inflow of water.