Swinging Buffering Plates for Fishway Flood Impact Reduction
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Solution Overview
Problem
Existing fishways lack effective buffering mechanisms to protect fish from the impact of emergent flood discharges, leading to potential damage and low protective efficacy.
Innovation Solution
A buffering fishway design featuring a fishway body with a migration passage, rotationally connected to a fixing base and a counterweighting floating dock, equipped with swinging buffering plates driven by a crank rocker mechanism and turbine deceleration device, which adjusts the fishway's inclination to optimize buffering during flood discharges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple fishway structure without buffering device is used, then the device complexity is reduced, but the protective effect on fish during flood discharge deteriorates
Solution Approach 1:
The buffering plates are designed to swing freely within the migration passage, transforming from a static structure to a dynamic one. During flood discharge, the plates swing to absorb impact energy, providing adaptive protection without requiring complex control systems. This dynamic design resolves the contradiction by achieving effective buffering while maintaining relatively simple structural complexity.
Solution Approach 2:
The buffering plates automatically respond to flood conditions through their own weight and the force of water flow, swinging to buffer impacts without external control. The counterweighting floating dock similarly self-adjusts the fishway body inclination based on water level changes. This self-service mechanism provides effective flood protection while avoiding complex control devices.
2Object-affected harmful factors
If a buffering device with swinging buffering plates is added to the fishway, then the protective effect on fish during flood discharge is improved, but the device complexity increases
Solution Approach 1:
The buffering function is segmented into multiple independent buffering plates distributed along the migration passage. Each plate operates independently to buffer local impacts, distributing the protective function across multiple simple components rather than one complex centralized system. This segmentation reduces overall device complexity while maintaining effective protection.
Solution Approach 2:
The counterweighting floating dock uses buoyancy and counterweight principles to automatically adjust the inclination of the fishway body based on water level changes. This passive counterweight mechanism provides adaptive buffering without requiring complex active control systems, resolving the contradiction between protective effect and device complexity.
3Stability of the object's composition
If the fishway body is made fixed without rotation capability, then the structural stability is improved, but the adaptability to different flood conditions deteriorates
Solution Approach 1:
The fishway body is designed with rotational capability at its upstream end, transforming from a fixed static structure to a dynamic adjustable one. During flood discharge, the fishway body can rotate to optimize its inclination angle, adapting to different water levels and flow conditions while maintaining structural stability through controlled movement. This dynamic design resolves the contradiction between stability and adaptability.
Solution Approach 2:
The rotatable fishway body serves multiple functions: it maintains structural stability during normal operation and automatically adapts to different flood conditions during emergencies. This multi-functionality allows a single structure to provide both stability and adaptability, resolving the apparent contradiction between these two requirements.
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
The buffering fishway effectively reduces the impact of flood discharges on fish by using swinging buffering plates to absorb energy, while the adjustable inclination enhances buffering efficiency across varying flood conditions, thereby protecting fish from damage.
Implementation Method 1
a plurality of buffering plates capable of swinging are hinged inside the migration passage
Implementation Method 2
the input end of the crank rocker mechanism is connected to the output end of a turbine deceleration device, the input end of the turbine deceleration device is connected to the output end of a flood discharging turbine
Implementation Method 3
the other end of the fishway body is rotationally connected with a counterweighting floating dock
Data Source
AI summary
The present disclosure discloses a buffering fishway suitable for emergent flood discharge with reduction in damage and a buffering method thereof. The buffering fishway includes a fishway body, wherein a migration passage is arranged inside the fishway body, one end of which is rotationally connected with a fixing base, and the other end of which is rotationally connected with a counterweighting floating dock, and a plurality of buffering plates capable of swinging are hinged inside the migration passage, furthermore, the present disclosure also provides a buffering method corresponding to it. The present disclosure effectively reduces the potential energy of the flood and weakens the impact force on the fish. Therefore, the gate dam having this design effectively avoids the fish in the fishway from being fiercely impacted by the flood and easily resulting in damage during discharging flood, having a high protective effect on the fish.