Pressure Reducing Valve Plunger With Integral Venturi Feedback
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Solution Overview
Problem
Conventional pressure reducing valves fail to compensate for changes in outlet fluid pressure due to fluctuations in outlet fluid flow rate, leading to undesirable pressure drops and requiring bulky external venturi designs that are prone to leaks.
Innovation Solution
An integrally formed venturi and channel within the plunger of the pressure reducing valve, which senses changes in outlet fluid flow rate and adjusts the force on the plunger to maintain stable outlet pressure, eliminating or reducing pressure drops while maintaining a compact design and avoiding exposed pipe conduits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If an external venturi with pipe conduit is used to compensate for outlet pressure changes, then pressure stability is improved, but device complexity and susceptibility to leaks increase
Solution Approach 1:
The venturi and channel are merged into a single integrated component formed within the plunger body, eliminating the need for separate external venturi and pipe conduit components. This integration maintains pressure compensation functionality while reducing system complexity and eliminating leak-prone connections.
Solution Approach 2:
The integrated channel within the plunger serves as an intermediary pathway that delivers pressure feedback from the venturi constriction to the pressure sensing cavity, replacing the need for external pipe conduits while maintaining the same functional role in pressure compensation.
2Stability of the object's composition
If an external venturi with pipe conduit is used to provide pressure feedback, then pressure compensation is improved, but reliability decreases due to exposed connections
Solution Approach 1:
By merging the venturi and channel into the plunger component, all pressure feedback pathways are contained within sealed internal passages, eliminating exposed external connections that could fracture or leak, thereby improving reliability while maintaining pressure compensation functionality.
3Stability of the object's composition
If an external venturi design is used, then pressure feedback is achieved, but volume and space requirements increase
Solution Approach 1:
The venturi and channel are combined into a single integrated component within the plunger, eliminating the need for separate external venturi housing and pipe conduit, thereby reducing overall system volume while maintaining pressure feedback functionality.
Solution Approach 2:
The channel and venturi features are nested within the plunger component structure, utilizing the existing component volume efficiently to house pressure feedback pathways without requiring additional external space.
4Device complexity
If conventional pressure reducing valve design is used, then simplicity is maintained, but outlet pressure stability deteriorates under flow fluctuations
Solution Approach 1:
The venturi and channel are merged into the plunger component, adding pressure compensation functionality without requiring separate external components, thus maintaining relative simplicity while improving pressure stability under flow fluctuations.
Solution Approach 2:
The integrated venturi and channel within the plunger enable the valve to automatically sense outlet pressure changes and self-adjust the opening degree to compensate for flow rate fluctuations, providing active pressure stabilization without external control systems.
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 integrated venturi and channel effectively stabilize outlet pressure by adjusting the biasing force in response to flow rate changes, reducing pressure losses and minimizing the risk of leaks, thus maintaining a compact and reliable pressure reducing system.
Implementation Method 1
a venturi is integrally formed within the plunger. The venturi has a venturi inlet and a venturi outlet with a venturi constriction therebetween
Implementation Method 2
a plunger positioned between the inlet and the outlet in which the plunger is coupled to a biasing member including a diaphragm and/or piston having a pressure sensing cavity
Data Source
AI summary
A pressure reducing valve includes a valve housing, plunger, pressure sensing cavity, and biasing member. The valve housing includes a valve inlet and valve outlet in selective fluid communication with each other. The plunger is in the valve housing and movable between a closed position and open position. The plunger is positioned downstream from the valve inlet and upstream from the valve outlet. The plunger includes a venturi and a channel. The venturi is within the plunger and has a venturi inlet and venturi outlet. The channel is within the plunger and is in fluid communication with the venturi. The pressure sensing cavity is in fluid communication with the channel. The biasing member exerts a biasing force on the plunger toward the open position. The channel is in fluid communication with the pressure sensing cavity to provide a fluid pressure that is lower than the outlet pressure during flow.