Steel flap gates are hydraulic structures that combine steel construction with the flap principle, primarily used for river regulation, reservoir control, and urban flood protection projects. Their key features include:
Structural Composition
Comprising a gate body frame, drive shaft, hydraulic system, and civil structure, they utilize steel materials with the main frame welded from high-quality steel for high strength and stability. The gate plates are typically made of steel, with thickness and material selected based on project requirements, and surface anti-corrosion treatment to extend service life.
Functional Characteristics
Bidirectional Water Retention: Adjustable water levels to create artificial waterfall landscapes;
Stepless Water Regulation: Achieves 0-90 degree free adjustment via the hydraulic system;
Aging Resistance: Steel structure design outperforms traditional rubber dams;
Automatic Control: Maintains set water level ranges by integrating hydraulic self-control principles.
Technical Parameters
Suitable for river widths of 10-100 meters and water level differences of 1-7 meters, with faster opening/closing speeds than rubber dams and excellent sealing performance (forward leakage ≤0.72 liters/minute·meter). Modern improved versions employ crank-arm structures to reduce bottom shaft torque, supporting single-span applications exceeding 60 meters.