Pressure Chamber Flow Regulator for Constant Irrigation Discharge
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Solution Overview
Problem
Conventional irrigation drippers fail to maintain a constant discharge flow rate due to varying pressure conditions, leading to water and energy loss in irrigation systems.
Innovation Solution
A flow regulating device with a pressure chamber and pressure release mechanism that ensures a constant flow rate by accumulating fluid until a predetermined pressure threshold is reached, allowing fluid to flow only when the pressure difference exceeds this threshold, thereby preventing discharge at low pressures and maintaining a consistent flow rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional aperture-based drippers are used, then the structure is simple and easy to manufacture, but the discharge flow rate varies with pressure changes
Solution Approach 1:
The dripper is segmented into distinct functional components: a pressure chamber for accumulating water, a flow regulation chamber with a flow regulator, and an outlet. This segmentation allows independent optimization of pressure accumulation and flow regulation functions, enabling constant flow rate maintenance while keeping each component structurally simple and easy to manufacture.
Solution Approach 2:
A flow regulator acts as an intermediary element between the pressure chamber and the outlet. This intermediary component actively responds to pressure changes by adjusting the flow aperture, thereby decoupling the relationship between inlet pressure and discharge flow rate, and maintaining constant flow despite pressure variations.
2Loss of energy
If pressure-independent flow regulation is implemented, then water loss is reduced, but the device complexity increases
Solution Approach 1:
The flow regulating device is designed to be self-regulating through the flow regulator mechanism that automatically responds to pressure changes. The device uses its own internal pressure conditions to control the flow aperture, eliminating the need for external control systems, sensors, or power sources, thereby reducing overall system complexity while maintaining constant flow and minimizing water loss.
Solution Approach 2:
Multiple functions are merged into a single integrated device: pressure accumulation in the pressure chamber, pressure sensing by the flow regulator, and flow control through the same regulatory mechanism. This functional integration achieves pressure-independent flow regulation without requiring separate components for each function, thus limiting the increase in device complexity.
3Ease of operation
If fluid is discharged at low pressure, then the outlet remains active, but water is lost at suboptimal flow rates
Solution Approach 1:
The flow regulator implements a feedback mechanism where the pressure conditions at the outlet are continuously sensed and used to adjust the flow aperture. When pressure is insufficient, the regulator reduces or closes the aperture to prevent wasteful discharge; when pressure is adequate, the aperture opens to allow optimal flow. This feedback control maintains outlet activity only under appropriate conditions, eliminating water loss at suboptimal pressures.
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 device ensures a pressure-independent flow rate, reducing water loss and enhancing the performance of irrigation systems by maintaining a consistent discharge even under varying pressure conditions.
Implementation Method 1
a pressure chamber connected via a fluid inlet channel to the inlet for accumulating fluid from the inlet
Implementation Method 2
allowing a fluid flow from the chamber through the outlet channel to the outlet when a pressure difference between the pressure chamber and the outlet channel exceeds a predetermined nonzero threshold
Implementation Method 3
the pressure release means is arranged to limit said fluid flow when the pressure difference is below the threshold
Data Source
Figure 1~2
Figure 3
Figure 4A~4B
AI summary
Flow regulating device (1) for regulating a flow of fluid therethrough, comprising an inlet (11) arranged to be coupled to a fluid supply (21), a pressure chamber (12) connected via a fluid inlet channel to the inlet (11) for accumulating fluid from the inlet (11), an outlet (14) for the fluid to flow out of the flow regulating device (1), and a fluid outlet channel extending between the chamber (12) and the outlet (14), wherein the fluid outlet channel and the fluid inlet channel have cross-sectional areas smaller than a cross-sectional flow area of the pressure chamber (12) for forming a pressure release means arranged to allow a fluid flow from the chamber (12) through the outlet channel to the outlet (14) when a pressure difference between the pressure chamber (12) and the outlet channel exceeds a predetermined nonzero threshold, and wherein the pressure release means is arranged to limit said fluid flow when the pressure difference is below the threshold.