Flow-Guiding Bypass Tunnel Gate Opening for High-Concentration Sediment
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Solution Overview
Problem
Existing sediment bypass tunnel gates lack self-adaptive control measures to match their openness with the vertical positions of water flows containing high sediment concentrations, leading to inefficient sediment discharge and potential blockages.
Innovation Solution
A flow guiding sediment bypass tunnel gate structure with self-adaptive inlet adjustment, utilizing a second regulator, revolution wheel, braking rims, and a monitor system to automatically adjust the gate's openness based on sediment concentration profiles, ensuring the gate aligns with the inflection point of sediment distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the gate opening is increased to discharge more sediments, then sediment discharge capacity is improved, but water discharge increases unnecessarily causing waste of water and reduced efficiency
Solution Approach 1:
The gate opening degree is made dynamically adjustable rather than fixed, allowing it to be optimized for each operating condition. The regulator can adjust the gate opening to match the actual sediment concentration and flow conditions, ensuring the gate is neither too open (wasting water) nor too closed (insufficient sediment discharge).
Solution Approach 2:
The system changes the gate opening parameter based on varying sediment concentration and flow conditions. By monitoring sediment concentration and adjusting the gate opening degree accordingly, the system optimizes the balance between sediment discharge capacity and water conservation under different hydrological conditions.
2Loss of energy
If the gate opening is decreased to reduce water discharge, then water waste is reduced, but sediment discharge capacity becomes insufficient during high sediment periods
Solution Approach 1:
The system incorporates sediment concentration monitoring and feedback control mechanisms. The regulator receives information about actual sediment concentration and flow conditions, then adjusts the gate opening degree accordingly. This feedback loop ensures the gate opening is optimized for each condition, preventing both water waste and insufficient sediment discharge.
Solution Approach 2:
The gate opening is made dynamically responsive to changing sediment concentration and flow conditions. Rather than being fixed, the opening degree can be adjusted in real-time to match actual operating conditions, ensuring adequate sediment discharge capacity is maintained while minimizing water waste.
3Device complexity
If a single sediment bypass tunnel is used to reduce engineering complexity, then construction cost and complexity are reduced, but scheduling flexibility and sediment discharge efficiency are limited
Solution Approach 1:
The single tunnel is equipped with a dynamically adjustable regulator that can modify the gate opening degree based on sediment concentration and flow conditions. This dynamic adjustment capability compensates for the lack of multiple tunnels, allowing the single tunnel to adapt its discharge capacity to match varying sediment transport requirements, thereby maintaining high sediment discharge efficiency without requiring multiple tunnels.
4Reliability
If the gate opening is optimized for high water head pressure safety, then flow safety is improved, but sediment discharge efficiency is reduced due to mismatched opening degree
Solution Approach 1:
The gate opening degree is made dynamically adjustable to accommodate varying operating conditions. The regulator can optimize the opening degree for each specific condition, ensuring flow safety under high water head pressure while simultaneously maximizing sediment discharge efficiency. This dynamic adjustment allows the system to adapt to different hydrological conditions rather than being constrained by a fixed opening optimized only for safety.
Solution Approach 2:
The system changes the gate opening parameter based on actual sediment concentration and flow conditions rather than using a fixed opening optimized only for safety. By monitoring conditions and adjusting the opening degree accordingly, the system maintains flow safety while optimizing sediment discharge efficiency under varying hydrological conditions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances sediment discharge efficiency by guiding high-concentration sediment flows into the tunnel and adapting the gate's opening to match sediment layering, thereby improving discharge precision and reducing blockages.
Implementation Method 1
a second braking rim (5), wherein a second regulator (2) is provided at a front side of the sediment bypass tunnel (1), the second revolution wheel (3) is provided on a top portion of the second regulator (2)... a bottom portion of the second valve lever (4) is rotatably connected with a top portion of the second braking rim (5)
Implementation Method 2
adapting the gate's opening to match sediment layering
Data Source
AI summary
A gate structure of flow guiding sediment bypass tunnel with self-adaptive inlet adjustment the gate structure comprises a sediment bypass tunnel main body, wherein: the sediment bypass tunnel main body comprises a second revolution wheel, a second braking rim, a top water stopper plate and a weir, a second regulator is provided at a front side of the sediment discharge tunnel, the second revolution wheel is provided at a top portion of the second regulator, a top portion of the second revolution wheel is welded with the second valve lever, the second valve lever is connected with the top portion of the second regulator, and by providing the flow guiding structure at the bottom portion bottom water flows with higher sediment concentrations can be guided into the tunnel; and the altitude of the flow guiding inlet at the bottom portion can be automatically controlled with the gate structure.