Valve Closure Confirmation via Nested Piston Indicator
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Solution Overview
Problem
Existing fluid valves lack a reliable mechanism to confirm closure, which is crucial for safety purposes.
Innovation Solution
A fluid valve with a pressure chamber, piston, and control member that includes a valve position indicator, which moves from a closed to an open state as the piston extends, providing visual or mechanical confirmation of the valve's position, ensuring it remains closed until the intended position is reached.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a valve is designed without a closure confirmation mechanism, then the device complexity is reduced, but the reliability of closure confirmation is insufficient
Solution Approach 1:
The indicator mechanism is nested within the valve body structure. The indicator shaft is housed inside the valve body, with the indicator head visible through a window. The piston is nested within the pressure chamber, and the control member is integrated with the valve member. This nesting approach provides reliable closure confirmation without significantly increasing the overall valve complexity or external dimensions.
Solution Approach 2:
The indicator shaft acts as an intermediary element that translates the movement of internal components (piston and control member) into a visible indication of valve position. The indicator mechanism mediates between the closed state of the valve and the visual confirmation provided to the operator, allowing reliable closure confirmation through a separate indication system rather than directly modifying the sealing mechanism.
2Reliability
If the second distance is less than or equal to the first distance, then the valve position indicator is actuated before the valve member reaches the closed position, but this may cause the indicator to not accurately reflect the actual valve position
Solution Approach 1:
The indicator is actuated in advance of the valve member reaching its final closed position. The piston engages the control member at a first distance, and the indicator is actuated at a second distance that is less than or equal to the first distance. This preliminary action ensures the indicator provides advance warning of the approaching closed state, allowing operators to monitor valve position progression rather than only the final state.
Solution Approach 2:
The system uses dynamic staging of the indication process. The indicator has different states (intermediate and final) that correspond to different stages of valve closure. The control member engages the indicator shaft at a specific point during piston travel, creating a dynamic indication sequence that reflects the progressive closing action rather than a static binary state.
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 ensures that the valve is reliably confirmed to be in a closed state, preventing unintended fluid flow and enhancing safety by providing a clear indication of its operational status.
Implementation Method 1
A piston (26) mounted within the pressure chamber (20) biased toward a retracted position and movable to an extended position in response to pressurized fluid entering through the pressurized fluid port (22)
Implementation Method 2
A piston (26) mounted within the pressure chamber (20) biased toward a retracted position
Implementation Method 3
a valve member (18) that is biased toward a closed position
Data Source
AI summary
A valve with proof of closure includes a valve body with a first port and a second port separated by a valve member that is biased toward a closed position. A piston is mounted within a pressure chamber with a pressure fluid port for connecting to a source of pressurized fluid. Piston is biased toward a retracted position and is moved to an extended position in response to pressurized fluid entering through pressurized fluid port. A control member is attached to valve member and is engaged by piston as it is moved a first distance from retracted position toward extended position. A valve position indicator with a closed state and as open state is biased toward the closed state and is actuated by piston as piston moves a second distance from retracted position toward extended position to move valve position indicator from closed state toward open state.