An arc steel gate is a type of steel gate that opens and closes by rotating around a support hinge, primarily used for flow regulation and flood discharge in hydraulic engineering. Its structural features and advantages are as follows:
Structural Composition
The arc steel gate consists of an arc-shaped panel, support arms, support hinges, and a sealing device. The panel is made of steel structure, the support arms transmit radial forces, the support hinges serve as the rotation center, and the sealing device ensures watertightness.
Classification Methods
Based on water depth, it is classified as a crest gate (reservoir water level does not exceed the gate top) and a submerged gate (reservoir water level is above the gate top); based on support arm type, it is classified as straight-arm type (for openings with a small width-to-height ratio) and inclined-arm type (for openings with a large width-to-height ratio).
Advantages
Effortless Operation: The support hinge is located above the water surface, and the force is transmitted through the centroid, requiring only overcoming self-weight and frictional resistance for operation.
Good Flow Conditions: No gate slot structure, resulting in low flow resistance, making it suitable for scenarios with high sediment content or abundant floating debris.
Material Savings: Compared to flat gates, the gate pier thickness is thinner, and fewer embedded parts are required.
Potential Disadvantages
Large Space Occupation: Requires substantial gate pier support structures, and maintenance and inspection cannot be performed by lifting the gate out of the opening.
High Installation Requirements: Strict precision requirements for civil engineering, ensuring the support hinge position is not impacted by sediment.
Arc steel gates are widely used in large hydraulic structures such as hydro-junctions and hydropower stations, playing a critical role in flow regulation, flood control, and drainage.
A steel gate is an movable water-retaining device composed of three parts: the gate leaf structure, embedded components, and hoisting machinery, primarily used for flow regulation and water pressure control at hydraulic engineering water passages. Its gate leaf structure includes a load-bearing frame, travel supports, and a rubber sealing device, achieving vertical lifting or rotational operation through coordination with the gate slot. Modern steel gates can be classified into three main types based on structure: fixed-wheel flat gates, arc gates, and integrated machine-gate units, with materials mostly made of low-carbon steel plates treated with sandblasting rust removal and hot-dip zinc anti-corrosion coating. The forward seepage rate of this equipment can be controlled within 0.03-0.72 liters per minute per meter, and it is widely used in river management, hydropower station water diversion, urban flood control, and other fields.