Multi-bend Control Circuit for Pressure-regulating Valves
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Solution Overview
Problem
Traditional pressure-regulating valves experience instability and wear due to contamination and undesirable droop characteristics, requiring frequent maintenance and failing to adapt to varying flow rates effectively.
Innovation Solution
A multi-bend control circuit with a sigmoidal flow path and adjustable sense line placement to achieve tunable droop characteristics, creating low-pressure regions during high-flow scenarios and reducing backside pressure, allowing for negative, positive, or flat droop performance without increasing valve complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional pressure-regulating valves use conventional control circuits, then the valve structure remains simple, but the valve experiences instability and contamination issues leading to frequent maintenance
Solution Approach 1:
The control circuit is segmented into multiple separate legs (first circuit leg, second circuit leg, third circuit leg) that are spatially distributed and functionally independent. Each leg handles specific fluid communication paths, dividing the complex control function into manageable segments that reduce contamination risk and improve reliability without excessive complexity
Solution Approach 2:
The control circuit transitions from a traditional planar or linear configuration to a three-dimensional multi-bend arrangement. The legs extend in different directions (first direction, second direction perpendicular to first, third direction perpendicular to second), creating a spatially distributed control architecture that improves fluid dynamics and reduces contamination while maintaining structural integrity
2Adaptability or versatility
If traditional valves use fixed droop characteristics, then the valve structure remains simple, but the valve cannot adapt to varying flow rates effectively causing wear on pumping elements
Solution Approach 1:
The control circuit incorporates dynamic adaptability through the multi-bend configuration that allows the sense line tap to interact with pressure variations across different legs. This dynamic structure enables the valve to automatically adjust droop characteristics (negative, positive, or flat) based on real-time flow conditions, improving adaptability without requiring complex external control systems
Solution Approach 2:
The valve utilizes parameter changes in the control circuit geometry (multi-bend angles, leg lengths, tap positions) to achieve different droop characteristics. By varying the physical parameters of the control circuit configuration, the valve can adapt its pressure-flow relationship to match different operating scenarios and pump requirements
3Duration of action of stationary object
If traditional valves experience high droop, then the valve structure remains simple, but wear on pumping elements increases reducing component life
Solution Approach 1:
The control circuit incorporates feedback mechanisms where the sense line tap monitors pressure conditions through the multi-bend leg structure and adjusts valve operation accordingly. This feedback control prevents excessive droop that would cause pump wear, extending component life by maintaining optimal pressure relationships between pump output and valve inlet across varying flow rates
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 provides superior pressure regulation with tunable droop characteristics, reducing wear on pumping components and improving valve performance across different flow rates, thereby extending component life and simplifying maintenance.
Implementation Method 1
A portion of the second circuit leg can extend beyond the intersection of the second circuit leg and the third circuit leg. The sense line tap can be in fluid communication with at least one of the first, second or third legs at a point that has a pressure less than that of the inlet of the first circuit leg.
Implementation Method 2
A multi-bend control circuit for fluid communication with an outlet port of a valve includes a first circuit leg extending in a first direction and a second circuit leg extending at an angle from the first circuit leg in a second direction. A third circuit leg extends at an angle from the second circuit leg in a third direction different from the second direction.
Data Source
AI summary
A multi-bend control circuit for fluid communication with an outlet port of a valve includes a first circuit leg extending in a first direction and a second circuit leg extending at an angle from the first circuit leg in a second direction. A third circuit leg extends at an angle from the second circuit leg in a third direction different from the second direction. A sense line tap is in fluid communication with at least one of the first, second or third legs.