Multi-Stage Strainer Assembly for Floor Drain Clogging
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Solution Overview
Problem
Existing liquid waste receptor systems, such as floor drains and troughs, often become clogged and allow unwanted debris to enter drainage systems, leading to backup issues and inefficiencies in waste management, particularly in commercial kitchen settings.
Innovation Solution
A strainer assembly comprising a grate with predetermined openings, a well drainage opening strainer assembly with a rigid support structure, and a basket strainer with a filter, designed to capture larger items and prevent smaller particles from entering the drainage system, while allowing easy removal and installation, and accommodating temperature and diameter variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a grate strainer is used to block larger items, then larger debris is prevented from entering the drain, but smaller particles like sand and coffee grinds can still pass through and clog the drainage system
Solution Approach 1:
The drainage system is segmented into multiple filtering stages: a grate strainer for large debris, a basket strainer for medium particles, and a fine mesh filter for small particles like sand and coffee grinds. Each stage handles a specific size range of debris, preventing any single filter from becoming overwhelmed and clogged.
Solution Approach 2:
The filters are nested within each other in a hierarchical structure where the grate strainer forms the outer layer, the basket strainer is positioned inside, and the fine mesh filter is nested within the basket strainer. This nested arrangement allows progressive filtration while maintaining easy access to each filtering stage for maintenance.
2Reliability
If a complex multi-layer filter system is implemented to capture all particles, then drainage reliability improves, but device complexity and maintenance difficulty increase
Solution Approach 1:
The filter system is divided into separable modules (grate strainer, basket strainer, fine mesh filter) that can be independently removed and cleaned. This segmentation maintains comprehensive filtration capability while simplifying maintenance, as each module can be accessed and serviced without disassembling the entire drainage system.
Solution Approach 2:
The filter system incorporates removable and adjustable components that allow dynamic maintenance. The basket strainer can be lifted out, and the fine mesh filter can be removed from the basket, enabling flexible cleaning schedules and easy replacement of individual filter elements based on debris accumulation patterns.
3Reliability
If the strainer assembly is made secure to prevent accidental removal, then system reliability improves, but ease of operation for maintenance decreases
Solution Approach 1:
The securing mechanism is segmented into a removable cap structure with a threaded connection to the drain pipe. This allows the strainer assembly to be securely attached during normal operation while enabling easy removal by simply unscrewing the cap, providing both security and maintenance accessibility.
Solution Approach 2:
The threaded cap connection provides dynamic security - firmly holding the strainer assembly in place during use, but allowing quick and tool-free removal when maintenance is needed. The dynamic nature of the threaded connection balances security requirements with ease of operation for routine maintenance.
Data Source
AI summary
A strainer assembly for use with a floor waste receptor having vertical walls and a floor forming a well into which liquid waste material can be collected and directed toward a well discharge opening and then into a drain pipe, the vertical walls having an outer flange extending outward from the vertical walls at a position below the top surface formed by the vertical walls, and an inner ledge formed below the top surface, and the floor shaped to form a ledge around the drain opening, comprising: a well discharge opening strainer assembly; a basket strainer sized to fit in the well and over the well discharge opening strainer assembly and sit on the floor ledge, the basket strainer provided with openings sized to permit liquid water matter of a second predetermined size to move from the floor receptor well through the basket strainer and into the well discharge opening strainer assembly, and a grate strainer sized to sit on the interior ledge.