Spring Seat Grooves for PRVC Diaphragm Burst Prevention
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Solution Overview
Problem
Conventional pressure relief valve controllers (PRVCs) experience diaphragm failure due to bursting under excessive air pressure, leading to rupture and the need for frequent replacements.
Innovation Solution
Incorporation of annular or conical grooves in the spring seat with a keyed interface formed by heating and conforming the diaphragm to these grooves, secured by a fastener, enhances diaphragm retention and prevents stretching over the piston.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the diaphragm is squeezed between the spring seat and piston in a conventional PRVC, then the PRVC can regulate pressure, but the diaphragm bursts under excessive air pressure causing failure
Solution Approach 1:
The spring seat is segmented with multiple annular grooves that divide the diaphragm into distinct retention zones. These grooves create multiple contact points and mechanical interlocks between the diaphragm and spring seat, preventing the diaphragm from stretching over the piston under excessive pressure.
Solution Approach 2:
The diaphragm is heated to a temperature where it becomes pliable before assembly, allowing it to be pre-formed into the grooves of the spring seat. This preliminary shaping creates a mechanical keyway effect that locks the diaphragm in place before service, preventing future bursting failures.
2Duration of action of stationary object
If the diaphragm is retained by squeezing between components, then assembly is simple, but the diaphragm requires frequent replacement due to rupture
Solution Approach 1:
The diaphragm is pre-heated and pre-formed into the spring seat grooves during assembly, creating a permanent mechanical interlock. This preliminary action ensures long-term retention and extends service life, while the heating process itself is a straightforward manufacturing step that does not significantly complicate assembly.
3Shape
If conventional diaphragm retention methods are used, then the structure is simple, but excessive pressure causes the diaphragm to stretch over the piston
Solution Approach 1:
Multiple annular grooves are cut into the spring seat, creating segmented retention zones that physically constrain the diaphragm at multiple locations. This segmentation prevents the diaphragm from stretching continuously over the piston, instead confining it within the groove boundaries.
Solution Approach 2:
The grooves are positioned at specific locations on the spring seat to provide localized retention points. This local quality enhancement concentrates the retention function at critical areas where the diaphragm is most susceptible to stretching, rather than relying on uniform compression alone.
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
Prevents diaphragm rupture and extends service life, maintaining PRVC calibration without replacement, reducing costs and weight while improving diaphragm retention.
Implementation Method 1
The heating can conform the diaphragm to at least one groove disposed in the spring seat. The heating of the PRVC assembly can occur for between about 30 minutes and about 120 minutes. In some embodiments, the heating of the PRVC assembly can occur at a temperature of between about 37 degrees Celsius and about 177 degrees Celsius.
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
A pressure relief valve controller (PRVC) (100) includes a housing (102) having a spring (104), a spring seat (106) connected to the spring (104), a piston (108), and a portion of which is disposed between the spring seat (106) and the piston, wherein one or more grooves and/or protrusions are disposed on at least one of the spring seat (106) or the piston (108). The diaphragm (110) can conform to the one or more grooves (116) of the spring seat (106) thus preventing diaphragm rupture due to excess pressure without affecting calibrations of current PRVCs.