Backpressure-Balanced Relief Valve Failure Detection
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Solution Overview
Problem
Pressure relief valves in fluid systems that experience back pressure can be challenging to monitor for potential failures, as existing technologies do not effectively detect issues such as balancing device failures or bonnet malfunctions in real-time.
Innovation Solution
A back pressure balanced relief valve system that includes a piston, a balancing device (such as a bellows or diaphragm), and a pressure sensor, along with a control system that monitors pressure changes in defined chambers to detect potential failures and provide alerts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pressure relief valves are used in systems with back pressure, then pressure protection is provided, but monitoring for potential failures becomes difficult
Solution Approach 1:
The patent implements preliminary action by installing pressure sensors in the bonnet chamber and bellows chamber to detect potential failures before they occur. The system monitors pressure differentials and triggers alerts when abnormal conditions are detected, allowing preventive maintenance before actual valve failure happens.
Solution Approach 2:
The patent uses pressure sensors as intermediary devices to indirectly detect balancing device failures. Instead of directly monitoring the bellows or diaphragm, the system measures pressure in the chambers that interact with these components, using pressure differential as a mediator to indicate failure conditions.
2Reliability
If balancing devices like bellows or diaphragm are added to balance back pressure, then valve performance is improved, but complexity of the system increases
Solution Approach 1:
The patent applies universality by designing a monitoring system that can detect multiple failure modes using the same basic components. The pressure sensors in both chambers can identify balancing device failures, bonnet malfunctions, and other abnormalities, making the system versatile for detecting various issues without requiring separate specialized sensors for each failure mode.
3Difficulty of detecting and measuring
If pressure sensors are installed to monitor chambers, then failure detection capability is improved, but device complexity increases
Solution Approach 1:
The patent implements feedback by continuously monitoring pressure in the bonnet chamber and bellows chamber, comparing the pressure differential against expected values, and providing real-time alerts when failures are detected. This closed-loop monitoring provides ongoing feedback on valve health without requiring complex manual inspection procedures.
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 system effectively monitors pressure changes to detect potential failures in balancing devices and bonnet malfunctions, allowing for timely alerts and reducing the risk of valve failure and unintended fluid venting.
Implementation Method 1
The pressure sensor can be in fluid communication with the pressure chamber, and can be configured to monitor the pressure in the pressure chamber for indications of a potential failure of the one of the bellows or the diaphragm
Data Source
AI summary
A diaphragm assembly for a pressure relief valve can include a disc guide that is configured to receive a portion of a disc holder, a bonnet adapter, and a diaphragm that is clamped at an outer edge between the disc guide and the bonnet adapter. The diaphragm assembly can be positioned between a bonnet of the pressure relief valve and a valve body of the pressure relief valve to convert the pressure relief valve to a backpressure-balanced pressure relief valve by counterbalancing a backpressure that acts upon the disc holder.