Single-Strut Pressure Regulator for Debris-Resistant Uniform Flow
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Solution Overview
Problem
Pressure regulators in irrigation systems face issues with debris collection on the valve seat and strut, leading to non-uniform pressure and flow rate, and excessive pressure losses due to the design of traditional cantilevered struts and valve configurations.
Innovation Solution
A pressure regulator design with an offset valve seat and strut, integrated with the sidewall of the inlet casing, reduces debris accumulation by providing a larger flow passage and lower frictional losses, featuring a triangular strut shape and a downstream post for enhanced support and debris deflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional cantilevered strut and valve seat configuration is used, then the valve seat is supported and positioned, but debris collects on the valve seat and strut causing clogging and non-uniform flow
Solution Approach 1:
The strut is repositioned from a central symmetric location to an asymmetric position offset from the flow passage centerline. This asymmetric positioning allows the strut to be integrated with the inlet casing sidewall, creating a more streamlined flow path that reduces debris accumulation and improves flow uniformity while maintaining structural support for the valve seat
2Strength
If the valve seat and strut are positioned in the center of the flow passage, then support is provided, but frictional pressure losses increase and flow uniformity decreases
Solution Approach 1:
The strut design incorporates a downstream post extension that projects into the flow passage from the inlet casing sidewall. This dimensional extension provides additional support leverage while positioning the main strut body outside the primary flow path, reducing frictional losses and improving flow uniformity without compromising structural support
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 design achieves reduced frictional pressure losses and minimizes debris-related clogging, ensuring a uniform flow velocity profile and consistent pressure delivery to irrigation sprinklers and nozzles.
Implementation Method 1
The tubular plunger is biased away from the valve seat in a normally open condition by a compression spring
Implementation Method 2
An increase in the inlet pressure will initially increase the pressure at the outlet and thus increase the pressure on the diaphragm. Due to the pressure increase, the diaphragm moves the tubular plunger towards the valve seat to narrow the gap and reduce the pressure at the outlet of the regulator
Implementation Method 3
Within a normal operating flow rate range, the spring force balances against the outlet pressure applied to the diaphragm. This balance sets the opening between the valve seat and the plunger to cause the desired pressure loss at the flow rate demanded by the sprinkler
Data Source
AI summary
A method to operate a pressure regulator including an inlet flow passage and an outlet flow passage; a plunger reciprocally between the inlet and outlet flow passages, wherein an axis of the plunger is offset from an axis of the inlet flow passage and the plunger moves with respect to a stationary valve seat to regulate pressure of liquid flowing through the pressure regulator.