Stormwater Drain Insert Filtration With Adjustable Overflow Frame
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Solution Overview
Problem
Conventional stormwater drain inserts struggle to effectively filter pollutants and manage overflow conditions during rainstorms.
Innovation Solution
The stormwater drain insert assembly includes a strainer basket with adjustable frame, a flexible top bib, and a filter bag that captures sediment and contaminants while allowing water to pass through.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a water permeable fabric layer is used to capture sediment and contaminants, then filtration effectiveness is improved, but the ability to handle overflow conditions deteriorates
Solution Approach 1:
The device is divided into distinct functional segments: a filtration layer for capturing contaminants and an overflow outlet structure for managing excess water. This segmentation allows each component to specialize in its function, resolving the contradiction between effective filtration and overflow handling capability
Solution Approach 2:
The overflow outlet structure acts as an intermediary element between the filtration layer and the environment. It provides a dedicated pathway for excess water to escape while maintaining the integrity of the filtration process, enabling both filtration effectiveness and overflow management to coexist
2Ease of manufacture
If a fixed-size frame is used in the stormwater drain insert, then manufacturing simplicity is improved, but adaptability to various catch basin sizes deteriorates
Solution Approach 1:
The frame incorporates adjustable elements that allow it to dynamically adapt to different catch basin dimensions. This dynamic capability enables a single frame design to serve multiple sizes of catch basins, maintaining manufacturing simplicity while achieving versatility
Solution Approach 2:
The adjustable frame is designed as a universal component that can accommodate various catch basin sizes through mechanical adjustment. This multi-functionality allows one frame design to replace multiple fixed-size frames, simplifying manufacturing while enhancing adaptability
3Object-affected harmful factors
If the stormwater drain insert is designed to capture all pollutants, then environmental protection is improved, but water flow efficiency deteriorates
Solution Approach 1:
The filtration system employs local quality variations with different filtration intensities in different areas. The overflow outlet structure provides a localized pathway that prioritizes water flow efficiency while the filtration layer captures pollutants, allowing both objectives to be achieved simultaneously through spatial differentiation of function
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 assembly effectively reduces environmental runoff by capturing pollutants and managing overflow, ensuring that water can still pass through efficiently.
Implementation Method 1
a filter bag that captures sediment and contaminants but allows water to pass through
Implementation Method 2
at least one raised overflow port extending upwardly from a top panel of the basket
Data Source
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AI summary
The stormwater drain insert assemblies include a strainer basket (20) and filter bag (40) that capture sediment, hydrocarbons, heavy metals and other contaminants, but allow water to pass through. The stormwater drain insert assemblies include a top bib (12) of flexible sheet material such as water-impermeable fabric surrounding and supporting the strainer basket (20). The strainer basket includes at least one raised overflow port (30) extending upwardly from a top panel of the basket. The top bib has a frame that may be adjustable in size in order to fit into various sizes of catch basins, resting on the lip between the top grate and the catch basin.