Storm Water Drain Pit Filter with Segmented Rigid Frame

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Solution Overview

Problem

Existing storm water drain filters require frequent removal and replacement, are prone to clogging, and lack efficient maintenance processes, leading to time-consuming maintenance and potential blockages in drainage systems.

Innovation Solution

A self-supporting, rigid filter with a cylindrical body made of coherent man-made vitreous fibres bonded with a cured binder composition, featuring a hollow centre and outer wall, allowing for easy maintenance without removal, improved filtration capacity, and hydrophilic properties to enhance water flow.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If existing filters are used in storm water drain pits, then filtration of particulates and debris is achieved, but the filters require frequent removal and replacement, increasing maintenance time and labor

Engineering Contradiction:
Improvefiltration efficiencyVSAvoidmaintenance time
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The filter assembly is divided into separable components: the reusable rigid frame structure and the replaceable filter bag. This allows the filter bag to be removed and replaced without removing the entire assembly from the drain pit, reducing maintenance time while maintaining filtration efficiency

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The filter bag is nested within the rigid frame structure, which remains permanently installed in the drain pit. The nested configuration allows the inner filter bag to be accessed and replaced independently, minimizing disruption to the drainage system during maintenance

Inventive Principle:
Principle #7Nested doll (Nesting)

2Quantity of substance

If existing filters are used to remove large amounts of particulates and debris, then filtration capacity is achieved, but the filters are prone to clogging and require frequent maintenance

Engineering Contradiction:
Improveparticulates removedVSAvoidresistance to clogging
Core Design Contradiction:
Quantity of substanceVSReliability

Solution Approach 1:

The filter bag material specifications and frame structural parameters are optimized to handle high volumes of particulates without clogging. The rigid frame maintains proper spacing and structural integrity under heavy debris loads, preventing collapse and clogging while allowing continuous operation

Inventive Principle:
Principle #35Parameter changes

3Strength

If existing filters are secured in place within the storm water drain pit, then the filters can withstand heavy storm water flows, but the entire filter assembly must be removed for maintenance

Engineering Contradiction:
Improveholding strengthVSAvoidease of maintenance
Core Design Contradiction:
StrengthVSEase of operation

Solution Approach 1:

The filter assembly is segmented into a permanently installed rigid frame that provides holding strength, and a removable filter bag for maintenance. This segmentation allows the frame to remain secured in the drain pit while the bag is easily accessible for replacement

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The filter bag is extracted as a separate, removable component from the rigid frame assembly. This extraction design allows maintenance workers to remove and replace the bag without disturbing the frame's secure installation, combining strong anchoring with easy maintenance

Inventive Principle:
Principle #2Taking out (Extraction)

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 filter maintains efficiency in removing particulates and debris, reduces maintenance time, and extends lifespan while preventing clogging, ensuring effective filtration and easy cleaning without disrupting the drainage system.

Implementation Method 1

a filter for removing particles from the storm water, comprising a cylindrical body comprising coherent man-made vitreous fibres (MMVF) bonded with a cured binder composition

Methodology Applied
Scientific EffectPhysical adsorption: Adsorption

Implementation Method 2

the filter maintains efficiency in removing particulates and debris

Methodology Applied
Scientific EffectMechanical filtration: Filter (physical)

Implementation Method 3

hydrophilic properties to enhance water flow

Methodology Applied
Scientific EffectCapillary action: Capillary Action

Implementation Method 4

a sedimentation chamber for sedimentation of particles from the storm water

Methodology Applied
Scientific EffectSedimentation: Sedimentation

Data Source

PatentUS20220282471A1Storm water drain pit
Publication Date: 2022.09.08 ROCKWOOL AS
  • US20220282471A1 patent drawing
  • US20220282471A1 patent drawing
  • US20220282471A1 patent drawing

AI summary

The invention relates to a storm water drain pit comprising: an inlet for storm water; a filter for removing particles from the storm water, comprising a cylindrical body comprising coherent man-made vitreous fibres (MMVF) bonded with a cured binder composition; wherein the cylindrical body has a hollow centre and an outer wall; a guide element for guiding water from the inlet into the cylindrical body; a sedimentation chamber for sedimentation of particles from the storm water, wherein the cylindrical body is positioned below the inlet and above the sedimentation chamber; an outlet for filtered water; wherein the outlet is positioned above the sedimentation chamber and below the inlet; and a separation element for separating the sedimentation chamber from the outlet; wherein the cylindrical body has a density in the range of 50 to 200 kg/m3, a binder content in the range of 2 to 5 wt % and the outer wall has a circumferential thickness in the range of 2 cm to 20 cm.