Moisture-Sensitive Irrigation Valve Assembly With Swellable Piston Control
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Solution Overview
Problem
Existing irrigation systems are complex, expensive, and require skilled operators, with a need for cost-effective and simple solutions that can efficiently regulate water supply based on moisture levels in the irrigation surface.
Innovation Solution
A self-regulating moisture-sensitive valve assembly that uses a swellable material housed within a porous body, coupled with an elastic diaphragm and piston, to control water flow based on moisture levels in the irrigation surface, preventing leakage and requiring minimal maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If electronic sensors and controllers are used to control irrigation based on moisture measurements, then irrigation control precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces electronic sensors and controllers with a purely mechanical moisture-sensitive valve system. The valve uses moisture-absorbing material that physically expands when exposed to moisture, mechanically actuating the valve to close and stop water flow. This eliminates the need for electronic circuitry, sensors, and controllers while maintaining moisture-based control functionality.
Solution Approach 2:
The valve assembly is self-regulating and automatically responds to moisture conditions without requiring external control systems. The moisture-absorbing material directly interacts with environmental moisture and mechanically actuates the valve based on moisture levels, making the system self-sufficient and eliminating complex electronic control infrastructure.
2Ease of operation
If swellable material is used to control valve operation based on moisture, then ease of operation is improved, but material leakage may occur reducing reliability
Solution Approach 1:
The patent uses a flexible membrane to contain the swellable material within the valve body. The membrane acts as a barrier that prevents the material from leaking while allowing it to expand and contract in response to moisture. This flexible enclosure maintains the integrity of the sealing mechanism while permitting the mechanical action needed for valve operation.
Solution Approach 2:
The patent changes the physical state and volume of the swellable material in response to moisture parameters. The material transitions from a contracted state (low moisture) to an expanded state (high moisture), which mechanically actuates the valve. This parameter change is contained within the flexible membrane structure that prevents leakage.
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 valve assembly effectively regulates water supply based on moisture levels, preventing water wastage and ensuring efficient irrigation, while being cost-effective and simple to operate, thus addressing the limitations of existing systems.
Implementation Method 1
The cylinder is charged with a water-absorptive expanding material. Further, the cylinder is thrusted into soil so that the water-absorptive expanding material absorbs moisture in the soil to expand
Implementation Method 2
an elastic diaphragm disposed between the swellable material and the piston
Data Source
AI summary
A valve assembly (300) is adapted to be coupled with a flexible pipe (200). The valve assembly (300) includes a hollow body (310) defining a first end (320) and a second end (330). A porous body (350) partially encloses the hollow body (310) proximate to the first end (320) and houses a swellable material (344). The hollow body (310) further defines a hollow chamber (340) between the first and second ends (320, 330). A piston (346) is disposed within the hollow chamber (340). The piston (346) is adapted to move between a first position (P1) and a second position (P2) corresponding to a contraction and an expansion of the swellable material (344). The valve assembly (300) selectively allows passage of water through the flexible pipe (200) based on the positions (P1. P2) of the piston (346). The irrigation system (100) is characterized in that the valve assembly (300) further includes an elastic diaphragm (380) disposed between the swellable material (344) and the piston (346). The elastic diaphragm (380) includes an annular bead (382).