Adjustable Fixed Pressure Relief Assembly with Retention Stops
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Solution Overview
Problem
Traditional pressure relief assemblies in regulators either lack adaptability (fixed assemblies) or reliability (adjustable assemblies), as adjustable assemblies are prone to unexpected movement of the relief spring seat due to loose compression nuts, posing safety risks and regulatory restrictions.
Innovation Solution
An adjustable-fixed pressure relief assembly with retention stops and a spring guide section on the actuator stem, which securely fixes the relief spring seat, allowing for adjustable set points without risking inadvertent movement, combining the adaptability of adjustable and reliability of fixed assemblies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an adjustable relief spring seat is used, then adaptability to different relief pressures is improved, but reliability deteriorates due to potential movement of the relief spring seat
Solution Approach 1:
The actuator stem is segmented into multiple discrete positions defined by retaining grooves, with retention stops that can be positioned in different grooves to provide predetermined relief pressure settings. This segmentation allows adjustment while preventing continuous movement.
Solution Approach 2:
Retention stops serve as intermediary elements between the adjustable relief spring seat and the actuator stem, mechanically preventing the relief spring seat from moving beyond designated positions while allowing intentional adjustment between positions.
2Reliability
If a fixed relief spring seat is used, then reliability is improved, but adaptability to different relief pressures deteriorates
Solution Approach 1:
The relief spring seat is designed to be dynamically adjustable between multiple fixed positions rather than being permanently fixed, allowing the system to adapt to different relief pressure requirements while maintaining the stability of fixed positions through retention stops.
3Reliability
If retention stops are added to prevent movement, then reliability is improved, but device complexity increases
Solution Approach 1:
The retention stops are merged with the actuator stem structure, with retaining grooves directly formed on the stem and retention stops integrated into the assembly, reducing the need for separate components and simplifying manufacturing.
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 a reliable and adaptable pressure relief mechanism that is easy to manufacture and install, ensuring secure operation in regulators, enhancing safety and compliance with regulations by preventing unintended movement of the relief spring seat.
Implementation Method 1
a relief spring disposed between a relief spring seat and the relief plate, the relief spring biasing the relief plate towards the diaphragm plate
Data Source
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AI summary
A pressure relief assembly may include an actuator stem (62) having a plurality of retaining grooves (92a, 92b, 92c). A relief plate (78) may be operatively connected to the actuator stem (62) and a diaphragm plate (76)may be operatively connected to the actuator stem (62). A diaphragm (72)may be least partially disposed between the relief plate (78) and the diaphragm plate (76). A relief spring seat (86) may be releasably attached to the actuator stem (62) at one of the plurality of retaining grooves (92a, 92b, 92c). The relief spring (84) may be adjusted by moving the attachment point from one retaining groove to another retaining groove.