Floating Flap Gate Counterweight Dynamics for Overflow Control
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Solution Overview
Problem
Existing floating flap gates face issues with delayed rising action during high-speed water inflow, leading to overflow, and difficulty in lowering the door body when the water level drops, resulting in hazardous sudden falls.
Innovation Solution
A floating flap gate design with a rope and counterweight or spring mechanism, where the counterweight or spring assists in raising and lowering the door body by adjusting its angle of inclination between 10° to 80°, providing resistance to control the speed and prevent overflow and sudden falls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a counterweight is added to assist the raising operation of the door body, then the rising speed is improved, but the lowering operation becomes difficult when water level drops
Solution Approach 1:
The patent applies dynamics by making the counterweight system conditional rather than continuous. The counterweight only assists raising when the door body angle is within 10° to 80°, and automatically disengages when the angle exceeds this range, allowing easy lowering when water level drops. This dynamic activation based on angular position resolves the contradiction between assisted raising and easy lowering.
Solution Approach 2:
The patent changes the operational parameters of the counterweight system based on the door body angle. By setting the counterweight to be effective only within specific angular ranges (10° to 80°), the system adjusts its mechanical advantage dynamically, providing assistance when needed for raising while allowing free lowering when the angle exceeds the threshold.
2Speed
If the door body rises quickly to prevent overflow, then the blocking speed is improved, but the door body may fall suddenly when water level drops
Solution Approach 1:
The system dynamically adjusts the counterweight engagement based on door body angle. When rising, the counterweight provides assistance within the 10° to 80° range to ensure quick blocking. When lowering, the automatic disengagement above 80° prevents sudden falls by allowing controlled descent, thus maintaining reliability while achieving speed.
Solution Approach 2:
The system uses the door body angle as feedback to control counterweight engagement. The angular position determines whether the counterweight assists raising or allows free lowering, creating a feedback-controlled mechanism that prevents sudden falls while maintaining rapid response capability for blocking overflow.
3Loss of time
If a counterweight system is used to assist raising, then the rising action is no longer delayed, but the system complexity increases
Solution Approach 1:
The patent uses a dynamic, angle-based activation system rather than a continuously engaged counterweight mechanism. This reduces complexity by only engaging the counterweight when needed (within 10° to 80° range) while allowing passive lowering when the angle exceeds 80°, eliminating the need for complex control systems.
Solution Approach 2:
The counterweight system is designed to be self-regulating based on door body angle. The mechanism automatically engages and disengages the counterweight assistance based on the angular position, eliminating the need for external control systems or complex mechanisms, thus reducing overall system complexity while eliminating rising delays.
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 mechanism effectively prevents water overflow during initial influx and ensures safe lowering of the door body, mitigating shock and allowing it to follow the water level, thereby preventing sudden falls and ensuring smooth operation.
Implementation Method 1
the other end of the rope is attached to a counterweight or a spring via at least a fixed pulley, so that the counterweight is at its lowest point or the spring reaches its natural length when the angle of inclination of the door body with respect to a horizontal plane reaches within a range from 10° to 80° during raising or lowering of the door body
Implementation Method 2
the other end of the rope is attached to a counterweight or a spring via at least a fixed pulley, so that the counterweight is at its lowest point or the spring reaches its natural length when the angle of inclination of the door body with respect to a horizontal plane reaches within a range from 10° to 80°
Implementation Method 3
blocks the opening at the time of a rising water to prevent the rising water from flowing into living spaces or underground spaces, by raising a door body, using a buoyancy of the water which is trying to flow in
Data Source
AI summary
A floating flap gate to prevent water from overflowing into underground spaces, with ease in raising or lowering the door body when water level changes. The floating flap gate comprises a door body with a forward end which swings upwards or downwards in a same direction following a rise or a drop in water level, wherein an opposite end serves as a fulcrum. A rod is attached to the forward end of the door body. One end of a wire rope is attached to the rod, and the other end is attached to a counterweight via fixed pulleys. The fixed pulleys are arranged so that the counterweight is at its lowest point when the angle of inclination of the door body with respect to a horizontal plane reaches within a range from 10° to 80° during raising or lowering of the door body.