Pressure Reducer Valve Body for Small Leakage Detection
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Solution Overview
Problem
Existing pressure reducers struggle to detect small leakages downstream, as they cause only minor movements of the valve tappet, making detection difficult and labor-intensive.
Innovation Solution
The pressure reducer features a valve body with a cylindrical or hollow-cylindrical contour, incorporating a flow channel that interrupts the sealing surface, allowing for greater movement of the valve tappet in response to pressure drops, facilitating easier detection of leakages by a sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional valve body with planar sealing surface is used, then the structure is simple, but small leakages cause only small movements of the valve tappet making detection difficult
Solution Approach 1:
The sealing surface is changed from a planar two-dimensional surface to a radially extending three-dimensional surface on the valve body. This radial sealing surface extends from the valve tappet outward, creating a sealing geometry that amplifies the relationship between leakage flow and tappet movement, thereby enhancing detection capability while maintaining structural simplicity.
2Ease of operation
If the sealing surface is interrupted by flow channels, then the valve tappet moves more significantly in response to pressure drops, but the sealing complexity increases
Solution Approach 1:
The radial sealing surface is segmented by one or more flow channels that extend radially outward from the valve tappet. These flow channels divide the sealing surface into separate sealing zones, allowing the sealing element to maintain contact with the segmented radial surface. This segmentation enables the sealing element to respond more significantly to pressure drops while keeping the sealing structure manageable through systematic division.
3Reliability
If a radial sealing surface is used, then leakage detection is enhanced, but the manufacturing complexity increases
Solution Approach 1:
The valve body is designed with a universal radial sealing surface geometry that serves multiple functions: it provides the sealing surface, defines the flow channels, and creates the pressure distribution necessary for tappet movement amplification. This multi-functional design reduces the need for separate manufacturing steps and specialized components, thereby improving ease of manufacture while maintaining high leakage detection reliability.
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 enables reliable and effortless detection of even small leakages, as the valve tappet moves significantly in response to pressure changes, allowing for accurate sensing and compensation of pressure drops.
Implementation Method 1
A spring force, which is provided by a spring element, acts on the diaphragm in the opening direction of the valve
Implementation Method 2
a force dependent on a pressure in the downstream pressure chamber and directed in the closing direction of the valve acts on the diaphragm
Data Source
AI summary
A pressure reducer includes a housing, defining upstream and downstream pressure chambers. A valve is positioned in the housing and includes a diaphragm acting on a valve tappet. The valve includes a valve body fastened to the valve tappet and cooperating with a sealing element. The valve body has a cylindrical, hollow-cylindrical, or conical contour and forms a sealing surface effective in the radial direction. The sealing surface is interrupted at at least one circumferential position by a flow channel, such that, depending on a pressure drop in the downstream pressure chamber, either the sealing element lies against the sealing surface and completely closes a flow region between the sealing element and the sealing surface or the sealing element is removed from the sealing surface and completely opens the flow region or the sealing element lies against the sealing surface and partly opens the flow region exclusively by the respective flow channel.