Pressure-Compensating Drip Irrigation Emitter with Flexible Diaphragm
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Solution Overview
Problem
Conventional drip irrigation emitters are sensitive to pressure variations, leading to non-uniform water distribution and energy inefficiency, as they rely on pressure-dependent flow rates and are prone to plugging due to design limitations.
Innovation Solution
A pressure-compensating emitter design featuring a flexible olefin block copolymer ribbon with a unique rail system that adjusts to pressure changes, allowing for uniform water distribution and self-cleaning by disengaging debris, using a combination of precise rotary mold design and polymer properties to form a bonded flow path with tapered teeth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional pressure-dependent emitters are used, then the device structure is simple, but water distribution uniformity deteriorates and energy efficiency worsens
Solution Approach 1:
The emitter employs a flexible diaphragm that dynamically deflects in response to pressure variations, automatically adjusting the flow path opening to maintain uniform water distribution across different pressure conditions without requiring complex external control mechanisms
Solution Approach 2:
The emitter utilizes pressure-induced parameter changes in the flexible diaphragm material, where pressure differential causes the diaphragm to deflect and alter the effective flow area, thereby compensating for pressure variations and maintaining consistent flow rates
2Ease of manufacture
If conventional emitters with fixed flow paths are used, then manufacturing is easier, but plugging resistance deteriorates
Solution Approach 1:
The flexible diaphragm creates a dynamic flow path that can open and close based on pressure conditions, allowing debris to pass through when pressure increases and preventing plugging by automatically adjusting the flow path geometry in response to clogging attempts
Solution Approach 2:
The emitter performs self-cleaning by using pressure differential to deflect the diaphragm and disengage accumulated debris from the flow path, eliminating the need for external cleaning mechanisms while maintaining continuous operation
3Reliability
If pressure-compensating design is implemented, then water distribution uniformity improves, but device complexity increases
Solution Approach 1:
The emitter uses a flexible diaphragm membrane that provides pressure compensation through its elastic deformation, achieving uniform water distribution through a simple yet effective mechanism that avoids complex mechanical or electronic control systems
Solution Approach 2:
The patent replaces complex mechanical pressure control mechanisms with a passive elastic membrane system that automatically compensates for pressure variations through its inherent material properties, simplifying the overall device structure while maintaining performance
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 output across varying pressures, reduces energy consumption, and prevents plugging by allowing debris to pass through, maintaining efficient flow and uniform crop irrigation.
Implementation Method 1
The base is arranged to deflect in response to a pressure differential between a pressure in the cavity and a pressure in a fluid flow passage of the fluid conduit
Implementation Method 2
The base is arranged to deflect in response to a pressure differential
Implementation Method 3
Each of the plurality of projections has a first surface that slopes downwards from the periphery towards the center of the cavity. The plurality of projections are arranged to reduce the pressure of fluid flowing through the cavity
Data Source
AI summary
The emitter attachable to a fluid conduit comprises a fluid inlet portion capable of taking in fluid from the fluid conduit. The fluid from the inlet portion moves to the pressure compensating or reducing portion which comprises a set of teeth which are arranged in a way so as to impede the flow of liquid thereby reducing the pressure. Downstream the pressure compensating portion is the output portion which communicates with an aperture in the fluid conduit to enable distributing the fluid to the environment. The base of the emitter is flexible allowing movement of the base by virtue of the pressure gradient. When the pressure of the fluid is reduced in the pressure compensating portion, a pressure gradient is created across the base and this result in the fluid in the fluid conduit moving the base towards the fluid conduit thereby reducing the volume of the cavity of the emitter.