Half-Cylinder Screen Intake for Shallow Water
Solution Overview
Problem
Existing screen intakes for water collection in shallow applications face issues with deflection, strength, and uneven flow distribution, making them prone to debris accumulation and requiring excessive clearance, which is not suitable for shallower water sources.
Innovation Solution
A screen intake apparatus with half-cylinder screens mounted on a base, featuring anchors, flow modifiers, and an air backwash system to maintain low profile operation and even flow distribution, while deflecting debris with a profiled barrier, reducing the operational depth and preventing debris buildup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If traditional flat screens are used in shallow water, then the intake can operate in shallow depths, but the screens experience deflection and strength problems under flow and debris
Solution Approach 1:
The patent applies curvature by using semi-cylindrical screens instead of flat screens. The curved geometry provides structural strength to resist flow and debris forces while maintaining a low profile for shallow water operation. The semi-cylindrical shape distributes hydraulic loads more effectively across the screen structure.
2Length of stationary object
If traditional flat screens are used, then shallow water operation is possible, but flow distribution over the screen surface becomes uneven
Solution Approach 1:
The patent incorporates flow modifiers at specific locations within the screen structure to locally adjust flow characteristics. These flow modifiers are strategically positioned to correct uneven flow distribution patterns, ensuring uniform flow across the screen surface while maintaining the shallow water operational capability.
3Reliability
If standard screen intakes are used, then proper operation is achieved, but excessive clearance above and below the intake is required
Solution Approach 1:
The semi-cylindrical configuration reduces the vertical profile of the screen intake compared to traditional flat screens. This curved geometry allows the intake to maintain structural integrity and operational reliability while requiring less clearance above and below the screen, enabling deployment in shallower water depths.
4Length of stationary object
If flat screens are used to reduce profile, then shallow water operation is enabled, but debris accumulation becomes difficult to prevent
Solution Approach 1:
The semi-cylindrical screen geometry prevents debris accumulation by eliminating flat surfaces where debris could settle. The curved surface promotes continuous flow and prevents stagnant zones, making it difficult for debris to accumulate while maintaining shallow water operational capability.
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 solution allows for efficient water intake in shallower waters with reduced operational depth, enhanced strength, and uniform flow distribution, minimizing debris accumulation and protecting aquatic life by controlling flow velocity.
Implementation Method 1
the flow velocity through the screens should be kept below a maximum peak level, which may be about 0.5 f/s. One way to reduce the flow resistance and control the flow velocity evenly across the screen's surface is to use flow modifiers inside the screen intake
Implementation Method 2
The screen intake can also have a manifold disposed in the screens for receiving a supply of air used to clear the screens of debris
Data Source
AI summary
A screen intake apparatus has a concrete platform resting on a water source floor. A screen intake anchors on the platform and forms a half cylinder thereon. A barrier at one end of the platform in divides the flow of water. The screen intake has a half-cylindrical body and half-cylindrical screens. Transition walls in the screen intake divide the body's hollow and the screens' interiors, and at least one flow modifier communicates the interior with the hollow. These flow modifiers also form a half cylinder with the platform. A manifold in the screens receives a supply of air to clear debris. Forming a half-cylinder, the screen intake on the platform can have a much lower profile for the water source than the normal cylindrical screens, which require half of its diameter in clearance above and below.