Pressure Relief Valve Opening Detection With Magnetic Indicator
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Solution Overview
Problem
Existing pressure relief valve systems in refrigeration systems face challenges in accurately identifying which valve has discharged during an over-pressure event, often requiring labor-intensive investigations and can provide false signals due to proximity of valves.
Innovation Solution
A pressure relief valve monitoring device that includes a striker and an indicator assembly separated by a diaphragm, where the striker is connected to a relief valve disk that releases under high pressure, and movement of the striker is detected by contact with the diaphragm or sensors, triggering the indicator assembly to provide an external indication of valve opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple pressure relief valves are installed in a refrigeration system, then the system's pressure protection capability is improved, but the difficulty of identifying which valve has discharged increases
Solution Approach 1:
The system divides the monitoring function into individual indicators for each relief valve. Each valve assembly includes its own unique indicator mechanism that can be independently activated, allowing operators to identify which specific valve has discharged without having to investigate multiple valves collectively.
Solution Approach 2:
A magnetic indicator assembly acts as an intermediary between the valve stem movement and the visual indication system. The magnetic coupling transmits motion from the valve stem to the indicator without direct mechanical connection, enabling reliable signal transmission while isolating the indication mechanism from the high-pressure valve environment.
2Measurement precision
If complex valve position sensors are used to detect relief valve discharge, then the detection accuracy is improved, but the system cost and complexity increase significantly
Solution Approach 1:
The system replaces complex electronic position sensors with a simple magnetic coupling mechanism. The magnetic indicator assembly uses magnetic fields to transmit valve position information without requiring wires, electronics, or complex sensor assemblies, thereby reducing system complexity while maintaining detection accuracy.
Solution Approach 2:
The magnetic indicator creates a visual copy or representation of the valve stem's position state. Instead of using complex sensors to measure and interpret valve position, the system creates a simplified magnetic copy of the valve state that can be easily observed and interpreted by operators.
3Ease of operation
If traditional monitoring systems are used to detect relief valve discharge, then false signals may occur from valves in proximity, but simpler systems require labor-intensive investigation to determine which valve has discharged
Solution Approach 1:
Each relief valve is equipped with its own dedicated magnetic indicator assembly that provides independent visual feedback. This segmentation allows operators to immediately identify which specific valve has discharged without having to systematically investigate multiple valves, thereby reducing investigation time while eliminating false signals from adjacent valves.
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 allows for easy identification of which relief valve has discharged, reducing the need for labor-intensive investigations and providing a non-intrusive, wireless attachment to the refrigeration system, minimizing false signals and increasing operational efficiency.
Implementation Method 1
movement of the striker is detected by contact with the diaphragm or sensors
Data Source
AI summary
Systems and methods described herein provide for pressure relief valve detection and monitoring. A valve assembly includes a valve body, having an inlet and an outlet, and a valve seat insert attached to the valve body between the inlet and the outlet. The valve body also includes an indicator assembly, a disk positioned within the valve seat insert; and a stem extending between the disk and the indicator assembly. The stem includes a magnet. A magnetic sensor is operable to identify proximity of the magnet. The valve seat insert is operable to release the disk when pressure at the inlet exceeds a threshold value. The disk, when released, moves the stem and magnet into a position that is detected by the magnetic sensor, and the indicator assembly indicates a valve opening event when the position is detected.