Self-Cleaning Filter Assembly for Irrigation Pressure Regulation
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Solution Overview
Problem
Existing irrigation systems lack an efficient self-cleaning filter assembly that can clean both control water and irrigation water filters on each on and off cycle of a control valve, leading to inconvenient and costly manual cleaning and potential pressure drops due to particulate matter accumulation.
Innovation Solution
A self-cleaning filter assembly is integrated upstream of both the solenoid-actuated valve and pressure regulating valve, featuring a wiper assembly that scrapes the filter screen during transitions between flow 'on' and 'off' conditions, ensuring both control water and irrigation water are filtered and debris is removed automatically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If filters are placed upstream of control valves and irrigation devices, then particulate matter is removed from water flow, but pressure drop across the filter increases and water flow is reduced due to material aggregation on the upstream side
Solution Approach 1:
The filter assembly incorporates an automatic cleaning mechanism that uses the existing control water flow to activate a wiper blade, which mechanically removes accumulated material from the filter screen without requiring external power sources or manual intervention. This self-service approach maintains filter performance while preventing significant pressure drops.
Solution Approach 2:
The cleaning mechanism operates periodically based on the on/off cycles of the control valve. Each time the control valve actuates, control water flow triggers the wiper blade to clean the filter screen, ensuring regular maintenance without continuous energy consumption. This periodic action prevents material aggregation that would cause pressure drops.
2Reliability
If manual cleaning of filters is performed, then filter performance is maintained, but labor costs and maintenance time increase
Solution Approach 1:
The automatic cleaning mechanism eliminates the need for manual filter cleaning by using the system's own control water flow to activate the wiper blade. This self-service feature maintains filter performance continuously without requiring operator intervention, thereby eliminating maintenance time loss and labor costs.
Solution Approach 2:
The invention replaces manual mechanical cleaning operations with an automated mechanical cleaning system. The wiper blade is actuated automatically by control water pressure rather than manual operation, substituting human labor with an automated mechanical process that operates whenever the control valve actuates.
3Reliability
If separate filters are used for control water and irrigation water, then both streams are filtered effectively, but device complexity and cost increase
Solution Approach 1:
The filter assembly is designed as a single multi-functional unit that filters both control water and irrigation water streams simultaneously. The filter screen is positioned to intercept particulate matter in both water flows, and the cleaning mechanism serves both filtration functions, thereby reducing device complexity while maintaining effective filtration for both streams.
Solution Approach 2:
The invention merges the filtration functions for control water and irrigation water into a single integrated filter assembly. Rather than using separate filters for each stream, the design combines both filtration functions in one unit with a shared filter screen and cleaning mechanism, reducing overall system complexity and component count while maintaining filtration effectiveness for both water streams.
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 effectively maintains water flow stability by automatically cleaning the filter assembly on each cycle, reducing manual maintenance costs and preventing pressure drops, thus enhancing the performance and efficiency of the irrigation system.
Implementation Method 1
a wiper assembly (36) positioned within the filter assembly (6) and in wiping engagement with the filter screen (40)
Implementation Method 2
a filter screen (40) positioned within the fluid flow passage (52) of the filter assembly (6)
Data Source
AI summary
A method of operating an irrigation system includes providing a flow of irrigation water, forming a flow of filtered water by removing particulate matter from the flow of irrigation water by using a filter, and directing a first portion of the flow of filtered water to a control valve. The method also includes directing a second portion of the flow of filtered water to a pressure regulator, delivering a flow of water from the pressure regulator to one or more irrigation devices, and automatically cleaning the surface of a filter upon activation or deactivation of the irrigation system.