Pressure Reducer Valve Seat Pressure Feedback
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Solution Overview
Problem
Existing pressure reducers exhibit suboptimal opening and closing behavior due to reliance on spring forces and pressure-dependent closing forces alone, which are not effectively influenced by flow conditions at the valve seat, leading to inefficiencies, especially in outdoor applications prone to frost and varying pressure conditions.
Innovation Solution
The pressure reducer design incorporates a pressure line branching off from the rear pressure chamber immediately adjacent to the valve seat, leveraging the Venturi effect to influence valve operation, and features an elastic sealing element with a conically contoured edge that presses against the valve seat, enhancing opening and closing behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pressure line branches off from the rear pressure chamber at a clear distance from the valve seat, then the structure is simpler and easier to manufacture, but the opening and closing behavior of the valve is suboptimal and not effectively influenced by flow conditions
Solution Approach 1:
The pressure line is positioned to tap pressure specifically at the valve seat region, creating a localized measurement point that reflects actual flow conditions. This local quality approach allows the system to respond to specific flow dynamics at the critical valve seat area without requiring complex global pressure monitoring.
Solution Approach 2:
The pressure line creates a feedback loop where pressure changes at the valve seat are transmitted to the diaphragm chamber, automatically adjusting the valve position in response to flow conditions. This feedback mechanism optimizes opening and closing behavior by continuously responding to actual valve seat pressure conditions.
2Adaptability or versatility
If only spring force and pressure-dependent closing force are used, then the device structure is simpler, but the control over opening and closing behavior is insufficient under varying pressure and environmental conditions
Solution Approach 1:
The system uses the flow conditions themselves to control the valve behavior. The pressure line taps into the flow-induced pressure changes and uses them to automatically adjust valve opening and closing, making the system self-regulating without requiring external control mechanisms or complex force dynamics.
Solution Approach 2:
The invention changes the pressure parameter measurement location from a distant point to the immediate valve seat region. This parameter change allows the system to detect and respond to actual flow conditions, enabling adaptive control of valve behavior under varying pressure and environmental conditions.
3Reliability
If the sealing element presses against the valve seat with an edge or corner, then the opening maintenance and closing behavior are improved, but the manufacturing precision requirements increase
Solution Approach 1:
The sealing element uses a conically contoured edge or corner geometry that concentrates sealing force at a specific point or line contact with the valve seat. This curved/conical geometry provides reliable sealing through point contact while being more tolerant to manufacturing variations compared to flat surface sealing.
Solution Approach 2:
The conical contour of the sealing element is designed to automatically align and concentrate sealing force as the valve closes, preparing the sealing interface in advance of full closure. This preliminary alignment action ensures reliable sealing without requiring extremely tight manufacturing tolerances.
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 configuration improves the pressure reducer's operational efficiency by adjusting the force dynamics based on flow conditions and valve seat geometry, ensuring better control over opening and closing, thus maintaining consistent performance across varying pressures and environmental conditions.
Implementation Method 1
Due to a Venturi effect of the valve seat when the valve is open, the pressure acting in the back pressure chamber immediately adjacent to the valve seat is lower than the pressure prevailing further downstream in the back pressure chamber
Data Source
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AI summary
Pressure reducer, comprising a housing (11) and a valve (12) positioned in the housing (11), which in the closed state separates a pre-pressure chamber (13) of the housing (11) from a back-pressure chamber (14) of the housing (11) and in the open state connects the pre-pressure chamber (13) and the back-pressure chamber (14), wherein the valve (12) has a diaphragm (16) acting on a valve plunger (15), on which, on the one hand, a spring force of a spring element (17) acting in the opening direction of the valve (12) and, on the other hand, a force acting in the closing direction of the valve (12) which depends on the pressure prevailing in the back-pressure chamber (14) acts, and wherein the valve (12) has a valve disc (21) attached to the valve plunger (15), which, in the closed state, presses against a valve seat (24) and, in the open state, is lifted from the valve seat (24),and wherein at least one pressure line (28) branches off from the back pressure chamber (14) immediately adjacent to the valve seat (24) in order to apply the pressure prevailing in the back pressure chamber (14) in the area of the valve seat (24) to the diaphragm (16).