Hydraulic Automatic Flap Gate

Hydraulic self-regulating flap gates are facilities that utilize the balance between hydraulic force and self-weight to automatically regulate water levels. They are widely used in water conservancy projects such as reservoirs, rivers, and irrigation systems, featuring simple structure and reliable operation.
Core Principle
Employing a lever balance and rotation mechanism, the gate's tilt angle is controlled by changes in the moment of water pressure and gate gravity. When the upstream water level rises, the dynamic water pressure increases, causing the gate to open automatically for discharge; when the water level drops, it closes on its own to maintain the set water level range.
Structural Components
Mainly includes panels, legs, piers, rollers, connecting rods, and other components. Taking the roller connecting rod type as an example, the double-pivot structure reduces vibration and optimizes flow control through pre-tilt angle design and trapezoidal practical weirs.
Development History
China began research and development in the 1960s, undergoing four generations of technological iterations:
First Generation: Horizontal-axis double-pivot hinge type
Second Generation: Multi-pivot hinge type
Third Generation (1982): Roller connecting rod type, addressing the issue of minor opening slapping
Fourth Generation (after 1990): Slider-type optimization, improving the flow coefficient
Main Functions
Automatically regulate water levels to prevent flooding or drought-induced water shortages
Optimize water resource utilization to meet irrigation, power generation, flood control, and other needs
Eco-friendly, reducing environmental impact
Advantages and Features
Automation: No manual operation required, reducing operational costs
Durability: Made of steel or composite materials, capable of withstanding immense water pressure and wave impact
Applicability: Suitable for small to medium-sized water conservancy projects, with low civil engineering and maintenance costs