PSV Discharge Indicator Using Inductive Plunger Sensing
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Solution Overview
Problem
There is a need for an effective indicator system to reliably detect when a pressure safety valve has discharged, as existing solutions lack robustness in high-vibration environments and do not provide immediate visual or remote notification of discharge events.
Innovation Solution
A pressure safety valve indicator is secured to the discharge pipe, featuring a plunger and inductive proximity sensor that detects the displacement of fluid-induced plunger movement, providing both local visual indication and remote signal transmission of discharge occurrence, with adjustable tension control to prevent false triggers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pressure safety valve indicator system is implemented to detect discharge events, then reliability of discharge detection is improved, but device complexity increases due to additional sensors and components
Solution Approach 1:
The patent replaces complex mechanical linkages and direct mechanical sensing with an inductive proximity sensor that detects plunger position wirelessly through electromagnetic induction. This eliminates the need for mechanical connections between the indicator and discharge pipe, reducing mechanical complexity while improving reliability in high-vibration environments.
Solution Approach 2:
The patent introduces a plunger as an intermediary element that translates fluid pressure changes into positional changes detectable by the inductive sensor. This intermediary mechanism allows indirect detection of discharge events, improving reliability without requiring direct sensor contact with the high-pressure fluid or complex mechanical linkages.
2Measurement precision
If an inductive proximity sensor is used to detect plunger position, then measurement precision of discharge detection is improved, but device complexity increases due to electronic components
Solution Approach 1:
The inductive proximity sensor provides non-contact, non-mechanical detection of plunger position through electromagnetic fields. This substitution of mechanical measurement systems with electromagnetic sensing achieves high measurement precision while reducing mechanical wear and vibration sensitivity, offsetting the electronic complexity with long-term reliability gains.
3Reliability
If adjustable tension control is added to prevent false triggers, then reliability of discharge detection is improved, but device complexity increases due to additional control mechanisms
Solution Approach 1:
The patent employs adjustable tension control that modifies the mechanical parameter of spring force to prevent false triggers. By allowing adjustment of this physical parameter, the system adapts to different operating conditions and vibration levels, improving reliability without requiring complex electronic control systems or multiple sensor types.
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 ensures reliable detection and notification of pressure safety valve discharges, even in high-vibration conditions, with adjustable tension control minimizing false triggers and enabling remote monitoring of discharge events.
Implementation Method 1
an inductive proximity sensor operatively arranged to determine the position of the plunger
Data Source
AI summary
A pressure safety valve (PSV) indicator arranged to be secured to a PSV discharge pipe over a first through-bore arranged therein, the PSV indicator including a connection including a first radially inward facing surface, an indicator cylinder, including a radially outward facing surface, a first end connected to the connection, a second end, and a second radially inward facing surface extending from the first end to the second end, a plunger slidably arranged in the indicator cylinder, the plunger including a head, and a neck having a third end, and an inductive proximity sensor operatively arranged to determine the position of the plunger.