Pressure Indicator Piston Mechanism for Over-Pressurization Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
It is difficult to determine if a pressure vessel has ever been over-pressurized, which hinders the evaluation of its integrity and failure investigation.
Innovation Solution
A pressure indicator with a rotatable disc and piston mechanism that visually indicates when the pressure exceeds a threshold, remaining tripped even after pressure returns to a safe level, allowing users to identify previous high-pressure events.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional pressure indicator is used, then the device complexity is low, but the measurement precision is insufficient to detect past high-pressure events
Solution Approach 1:
The indicator employs a dynamic piston that moves in response to pressure changes, transitioning between positions to trigger different visual indications. The piston's movement from retracted to extended position enables the system to detect and record past high-pressure events, improving measurement precision while maintaining mechanical simplicity
Solution Approach 2:
The indicator uses color-changing sectors on a rotatable disc to provide visual feedback about pressure states. Different sectors display different colors (e.g., green for safe pressure, red for high pressure) that are visible through windows in the body, allowing users to immediately identify current and past pressure conditions without complex electronics
2Reliability
If a simple pressure indicator is used, then the ease of operation is high, but the reliability is insufficient to indicate past over-pressurization
Solution Approach 1:
The indicator provides continuous visual feedback about both current and past pressure states through the rotatable disc and piston mechanism. The system reliably indicates when pressure has exceeded the threshold by extending the piston and rotating the disc to display appropriate colors, giving users confidence in the integrity assessment without requiring complex user interaction
Solution Approach 2:
The indicator automatically responds to pressure changes without requiring user intervention. The piston self-actuates based on pressure differential, and the disc rotates automatically to display the appropriate indication, maintaining ease of operation while ensuring reliable detection of past high-pressure events
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
Provides visual feedback on both current and past pressure states, enhancing the assessment of pressure vessel integrity without requiring complex electrical systems.
Implementation Method 1
The first biasing element is disposed between the base of the piston and the shoulder of the body, wherein a force of the first biasing element is overcome by pressure of fluid acting on the base at or above the threshold pressure
Implementation Method 2
The second biasing element is configured to urge the disc to a second rotational position when the piston is in the second axial position
Data Source
Figure 1~2
Figure 3~3A
Figure 4~4A
AI summary
A pressure indicator (28) includes a body (58), a piston (32), first (68) and second (74) biasing elements, and a rotatable disc (38). The piston (32) is disposed at least partially in a bore (82) of the body (58) at a first longitudinal axial position relative to the body (58) when pressure of fluid acting on the base (30) is below a threshold pressure. The first biasing element (68) is disposed between a base (30) of the piston (32) and a shoulder (72) of the body (58), wherein a force of the first biasing element (68) is overcome by pressure of fluid acting on the base (30) at or above the threshold pressure, thereby allowing the piston (32) to move to a second longitudinal axial position. The rotatable disc (38) has a first rotational position when the piston (32) is in the first axial position. The second biasing element (74) is configured to urge the disc (38) to a second rotational position when the piston (32) is in the second axial position.