What are Floodgates?
The gate is used to close and open the control facilities of the drain (discharge) water channel. An important part of hydraulic structures can be used to intercept water flow, control water level, regulate flow, discharge sediment and floats, etc.
- Chinese name
- Gate
- Foreign name
- gate
- The gate is used to close and open the control facilities of the drain (discharge) water channel. An important part of hydraulic structures can be used to intercept water flow, control water level, regulate flow, discharge sediment and floats, etc.
Gate gate gate classification
- (1) Divided by production materials. There are mainly wooden gates, wooden panel steel frame gates, cast iron gates, reinforced concrete gates and steel gates. (2) Divided by the relative position of the top of the gate and the horizontal plane. There are mainly open-top gates and submerged gates. (3) Divided by the nature of work. There are working gates, accident gates and maintenance gates. (4) Divided by gate opening and closing method. Mainly used to operate the opening and closing gates and hydraulic automatic gates to control the opening and closing by utilizing the changes in the water pressure of the gates when the water level fluctuates. (5) Divided according to the different support forms of the door leaf. Mainly supported by fixed-wheel support gates, hinge-supported gates, slide-supported gates, sprocket gates, string roller gates, round roller gates, etc.
Gate structure composition
- The gate is mainly composed of three parts:
- The movable part of the main body is used to close or open the orifice, commonly known as the gate and the leaf;
- buried part;
- opening and closing equipment.
- The moving part includes weighing structures such as panel beams, supporting walking components, guiding and water stopping devices and lifting eyes. The embedded parts include main rails, guide rails, hinges, lintels, bottom sills, water stops, etc. They are buried around the orifice, and are firmly connected to the concrete of the hydraulic structure with anchor ribs, which are respectively formed to support the door leaves Components and water-stop surface, in order to transfer the loads such as water pressure on the door leaf structure to the hydraulic structure, and obtain good water-stop performance of the gate. The opening and closing machinery is connected with the door leaf lifting ears to control the position of the moving part, but there are also a few gates that are automatically opened and closed by hydraulic control.
Gate type selection
- When selecting the gate type, it is necessary to determine it through technical and economic comparison according to the gate's working nature, installation location, operating conditions, gate hole span, opening and closing force, and engineering cost, etc., taking into account the characteristics of the gate and referring to existing operating practices. Among them, the plane gate and the arc gate are the most commonly used gate shapes. Large, medium-sized open-top and submerged working gates are mostly arc-shaped gates, and high-head and deep-hole working gates are particularly commonly used arc-shaped gates. When used as accident gates and maintenance gates, plane gates are mostly used. Maintenance gates and accident gates are often set before the working gates. For high-head water-discharge working gates, due to frequent hydraulic operation or partial opening, efforts should be made to reduce gate vibration and cavitation, improve gate hydraulic conditions, consider the impact of dynamics according to different components, and conduct stiffness and dynamic characteristics of the gate body. Analysis. The manufacturing and installation accuracy of door leaf and embedded parts should be strictly controlled. When the flow pattern of the door groove boundary is complex or the shape is special, in addition to the successful test of the existing operation, the possible vibration, Cavitation problem to select the appropriate door slot shape. [1]