Hinged Flap Sluice Gate for Leak-Tight Sediment Discharge

The patent replaces the conventional sliding mechanical structure with a rotational flap gate mechanism. The gate rotates around a hinge shaft instead of sliding, eliminating the sliding structure that causes foreign matter fixation and sealing difficulties. This mechanical substitution resolves the contradiction by maintaining operational smoothness through rotation while improving sealing through the flap gate's geometry and water pressure action.

The patent employs a self-service mechanism where water pressure from the reservoir itself provides the driving force to open the flap gate. When water level rises, the pressure automatically pushes the gate open without requiring external hydraulic apparatus. This eliminates complex hydraulic systems and associated leakage risks while maintaining operational capability through the gate's hinge mechanism and buoyancy effects.

The patent converts the harmful effect of water pressure (which can cause leakage in sliding gates) into a beneficial sealing force. The flap gate design allows water pressure to press the gate against the sealing surface, enhancing the seal. The hinge mechanism and gate geometry are designed so that water pressure naturally improves sealing rather than compromising it, resolving the contradiction between structural simplicity and sealing reliability.

The patent utilizes the rotational motion of the flap gate as a form of mechanical action to disturb and move precipitated sand and slurry. When the gate rotates open, it creates turbulence and flow patterns that prevent blockage by keeping sediments in motion. The gate's movement stirs up settled materials, ensuring smooth discharge without blockages while maintaining efficient water storage during closed periods.