Elastomeric Drip Emitter Pressure Compensation and Root Inhibition
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current irrigation drip emitters face challenges such as inconsistent water output due to pressure fluctuations, clogging from particulates, and interference with fluid flow, which leads to inefficient water distribution and potential plant damage, especially in subsurface applications where root growth and debris pose additional issues.
Innovation Solution
A unitary elastomeric drip emitter design with a pressure-reducing flow channel and pressure compensating mechanism, featuring a tapered inner baffle wall and moveable baffle portions, deflects particulates and adjusts flow channel cross-section to maintain constant output, while a root inhibitor member prevents root interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional drip emitter design is used, then water distribution is provided, but pressure fluctuations cause inconsistent water output
Solution Approach 1:
The emitter incorporates a flexible diaphragm that dynamically adjusts the flow passage cross-sectional area in response to pressure fluctuations. When pressure increases, the diaphragm deflects to reduce the opening, maintaining constant flow rate. This dynamic adaptation resolves the contradiction between reliability of water output and resistance to pressure variations.
Solution Approach 2:
The emitter changes the physical state of the flow passage by using a flexible diaphragm that alters the opening area based on pressure conditions. This parameter change allows the emitter to maintain consistent water output despite pressure fluctuations, improving reliability while adapting to varying pressure stress.
2Productivity
If the inlet flow through area is increased to allow proper emitter functioning, then water flow is improved, but particulate matter can enter and clog flow passages
Solution Approach 1:
The emitter introduces a flow passage design with specific geometric features that act as an intermediary mechanism between the inlet and the internal flow channels. The passage includes a reduced cross-sectional area section that functions as a natural filter, allowing water to pass while intercepting and redirecting particulate matter away from critical flow passages, thus maintaining productivity while preventing clogging.
Solution Approach 2:
The flow passage is segmented into multiple sections with varying cross-sectional areas. The inlet section has a larger area to accommodate high flow rates, while internal sections have optimized areas that prevent particulate accumulation. This segmentation allows the emitter to maintain high water flow productivity while creating zones that prevent clogging.
3Ease of manufacture
If a multi-piece housing structure is used, then assembly flexibility is provided, but misalignment of parts causes malfunction
Solution Approach 1:
The emitter merges multiple components (housing, diaphragm, flow passages, and sealing elements) into a single integrated unit. This unification eliminates alignment issues between separate parts while maintaining the functional benefits of a multi-component design. The merged structure ensures reliable operation by preventing misalignment, while still allowing for manufacturing flexibility through modular molding techniques.
Solution Approach 2:
The integrated emitter design performs multiple functions within a single structure: it provides housing, creates flow passages, incorporates pressure compensation through the diaphragm, and includes sealing mechanisms. This multi-functionality reduces the number of separate parts that need alignment, thereby maintaining ease of manufacture while improving reliability through reduced assembly complexity.
4Reliability
If in-line emitters are used, then emitters are less susceptible to being knocked loose, but they interfere with fluid flow through the conduit
Solution Approach 1:
The emitter uses a flexible diaphragm that dynamically adjusts the flow passage area to compensate for pressure changes caused by the emitter's presence in the conduit. This dynamic adjustment minimizes the energy loss from flow interference while maintaining secure in-line retention, resolving the contradiction between reliability of retention and energy efficiency of fluid flow.
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 ensures consistent water distribution, reduces clogging and root interference, and maintains efficient fluid flow, even under varying pressure conditions, enhancing the reliability and longevity of irrigation systems.
Implementation Method 1
The body defines a flow channel between the inlet and the outlet area and having a floor. The body further defines a pressure compensating member moveable between a first position and a second position in response to an increase in pressure of the pressurized supply line fluid
Implementation Method 2
pressure compensating member moveable between a first position and a second position in response to an increase in pressure of the pressurized supply line fluid, wherein the pressure compensating member reduces a cross-section of the flow channel when viewed from a top view
Implementation Method 3
Another aspect of the invention provides a housingless irrigation drip emitter made of an elastomeric material
Data Source
AI summary
An irrigation drip emitter, and methods relating to same, are provided for delivering irrigation water from a supply tube to an emitter outlet at a reduced and relatively constant flow rate. The emitter having at least one moveable member for compensating for fluctuations in supply line fluid pressure. In one form the emitter further includes a root growth inhibiting member for hindering roots from obstructing fluid flow through the emitter. In another form, the emitter includes an inlet protrusion so that fluid entering the emitter comes from a position closer to the central or center portion of the conduit in order to avoid larger obstructions that may be located near the periphery of the conduit. In another form, the emitter includes a carrier for assisting in mounting the emitter into conduit. In another form, more than one of the above features are present.