Comprehensive technical analysis of gates, combined with application scenarios in water conservancy engineering:
1、 Definition and Function
A gate is a critical hydraulic facility used to close/open drainage channels, with core functions including:
Intercept water flow, regulate water level and flow rate
Discharge of sediment and floating debris
Ensure flood control safety (for example, Jinan Hongyuan Gate dynamically adjusts the gate five times within 17 hours to cope with rainstorm)
2、 Classification system
By material
Cast iron gate (HT250/ductile iron, corrosion-resistant)
Steel gate (welded structure, suitable for large-span)
Composite material gate (such as fiberglass)
According to work status
Working gate: Conventional dynamic water opening and closing (such as Xihe control gate)
Accident gate: emergency quick closure (such as power station diversion channel)
Maintenance gate: static water operation
Special type
Cylindrical gate (specifically designed for vertical shaft pressure tunnels, prone to vibration requiring model verification)
Radial gate (water pressure self reinforced seal)
3、 Typical structural components
Example application of component function description
Gate leaf water retaining body (steel/cast iron/concrete) flat gate, arch gate
The embedded parts are fixed around the hole opening (gate pier/bottom plate), and the installation base of the waterproof rubber strip is installed
Opening and closing machine drive device (screw/winch/hydraulic) 500kN screw opening and closing machine
4、 Application Cases of Water Conservancy Engineering
Flood control regulation: The Hongyuan gate of the Xiaoqing River in Jinan has passed the precise control of the gate five times within 17 hours to maintain the low water level of the river in response to rainstorm.
Cross basin water diversion: The Xihe control gate is linked with six gates to achieve safe diversion of the Ziya River and Zhongting River water systems.