Offset Valve Seat Pressure Regulator for Debris and Pressure Loss
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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 variations, 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, featuring a triangular shape and downstream post, which reduces debris accumulation and frictional losses by creating a larger hydraulic diameter and smoother flow passage, and is formed as a single plastic injection molded component.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional cantilevered strut and valve seat configuration is used, then the valve seat can be positioned to control flow, but debris collects on the valve seat and strut causing flow obstruction and pressure variation
Solution Approach 1:
The patent positions the valve seat offset from the central flow axis and uses a single strut angled relative to the flow direction, creating an asymmetric configuration that prevents debris from settling on horizontal surfaces. The strut is positioned and angled such that debris is swept along by the flow rather than accumulating on support structures.
Solution Approach 2:
The patent extracts the strut support from the traditional vertical configuration and repositions it as a single angled strut integrated with the offset valve seat, removing the multiple horizontal surfaces that would otherwise collect debris. This simplification eliminates the debris collection problem while maintaining structural support.
2Object-affected harmful factors
If the valve seat is offset from the flow passage, then debris collection is reduced, but pressure losses increase due to extreme turns in the water passage
Solution Approach 1:
The patent positions the offset valve seat and single strut in a configuration that utilizes three-dimensional space more efficiently. The angled strut and offset seat create a flow path that moves debris in multiple dimensions rather than requiring sharp turns, reducing pressure losses while maintaining debris suppression.
3Strength
If multiple struts are used to support the valve seat, then structural support is improved, but debris collection increases on the struts and valve seat
Solution Approach 1:
The patent uses a single integrated strut structure rather than multiple separate struts, effectively segmenting the support function into one continuous element that is angled to prevent debris accumulation. This single strut provides sufficient structural support while eliminating the multiple surfaces that would collect debris.
Solution Approach 2:
The patent merges the valve seat and strut into an integrated offset configuration where the strut is directly attached to the offset seat, creating a unified structure that reduces the number of separate components and minimizes debris collection surfaces.
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
This design reduces frictional pressure losses, minimizes debris collection, and maintains a uniform flow velocity profile, enhancing the performance and reliability of pressure regulators in irrigation systems.
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
The pressure of the flow at the outlet of the regulator acts on a diaphragm in the regulator. The diaphragm is attached to and moves with the plunger
Implementation Method 3
Pressure loss through the regulator is controlled by a gap between a valve seat and a tubular plunger
Data Source
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AI summary
A pressure regulator (10, 90) including: a housing (12, 14, 100) including an inlet flow passage (24, 106) and an outlet flow passage (26); a plunger (30, 92) reciprocally mounted in the housing and including a plunger flow passage (34); and a valve seat (32, 102) fixed to the housing and positioned between the inlet flow passage and an inlet to the flow passage of the plunger, wherein the valve seat is configured to receive and abut the inlet to the flow passage of the plunger.