Rotating Rotor Self-Cleaning Valve Filter
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Solution Overview
Problem
Flow control valves in irrigation systems often clog due to dirt, corrosion, and debris in the metering passage, preventing water pressure from building up and causing the valve to fail in closing, as existing solutions like longitudinally moving wiper blades are ineffective in cleaning the filter screen.
Innovation Solution
An elongated filter with a rotatably mounted rotor having a scraping surface that rotates with water flow to remove debris along the filter's length, ensuring the metering passage remains clear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a filter screen is used to prevent debris from blocking the metering passage, then the valve can close properly, but the filter screen becomes clogged with debris over time
Solution Approach 1:
The rotor assembly is driven automatically by water flow through the valve, causing it to rotate and scrape the filter screen continuously. This self-powered mechanism cleans the filter without requiring external power or manual intervention, preventing debris accumulation that would block the metering passage while maintaining reliable valve operation.
Solution Approach 2:
The rotor provides continuous cleaning action as long as water flows through the valve. The constant rotation ensures debris is continuously removed from the filter screen, preventing clogging and maintaining uninterrupted flow through the metering passage, rather than periodic or intermittent cleaning.
2Ease of operation
If a longitudinally moving wiper blade is used to clean the filter screen, then some debris removal is achieved, but the wiper blade fails to effectively clean the filter and may embed debris further
Solution Approach 1:
The cleaning mechanism transitions from linear longitudinal motion to rotational motion around the filter screen. The rotor rotates circumferentially, allowing the scraping surface to contact and remove debris from all areas of the filter screen effectively, rather than just passing over the surface in a straight line.
Solution Approach 2:
The rotor is designed to rotate dynamically with water flow rather than moving linearly. This rotational dynamics allows the scraping surface to maintain continuous contact with the filter screen circumference, effectively removing debris that would otherwise be embedded or left behind by linear wiper motion.
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 self-cleaning mechanism effectively prevents clogging, maintaining free flow through the valve by continuously scraping off debris, ensuring consistent operation and preventing blockages.
Implementation Method 1
As water enters the valve, the rotor rotates, causing the scraping surface to scrape off any debris along the length of the filter
Data Source
AI summary
An elongated filter disposed over a metering passage of a valve. A rotor is rotatably mounted over the filter and includes a scraping surface positioned along the length of the filter. As water enters the valve, the rotor rotates, causing the scraping surface to scrape off any debris along the length of the filter.