Bi-Stable Valve Actuation for Adjustable Flow and Readable Labels
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Solution Overview
Problem
Existing valve actuating devices lack flexibility in adjusting flow rates and maintaining readable orientations of manual operating elements, especially when used with instantaneous water heaters, which require varying flow rates based on temperature changes.
Innovation Solution
A valve actuating device with a bi-stable mechanism that allows for rotational adjustment of the switching position via an adjustment part relative to the manual operating element, enabling independent adjustment of the open position without altering the spatial orientation of the manual operating element, and accommodating different flow rates by varying the open position of the main valve.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the manual operating element is equipped with an additional degree of freedom of movement to set the open position, then different through-flow openings can be formed on the main valve, but the spatial orientation of the manual operating element changes, making labels unreadable
Solution Approach 1:
The device is segmented into two independent adjustment mechanisms: the manual operating element for switching between open/closed positions, and a separate adjustment part for setting the open position. This segmentation allows each component to perform its function independently without interfering with the other's orientation or readability.
Solution Approach 2:
The adjustment part is designed to rotate about the actuating direction (axial rotation) rather than moving the manual operating element laterally. This dimensional change in the adjustment mechanism allows flow rate modification without altering the spatial orientation of the manual operating element, keeping labels readable.
2Device complexity
If a fixed open position is used in the bi-stable mechanism, then the structure is simple, but the flow rate cannot be varied for different operating conditions
Solution Approach 1:
The bi-stable mechanism is enhanced with a dynamic adjustment capability. The adjustment part can rotate to different angular positions, dynamically changing the stop position and thereby varying the open position of the main valve. This allows the system to adapt to different flow rate requirements while maintaining the fundamental bi-stable structure.
Solution Approach 2:
The open position parameter of the main valve is made adjustable through the rotational movement of the adjustment part. By changing the angular position of the adjustment part, the stop position changes, which in turn adjusts the open position parameter of the main valve to achieve different flow rates.
3Device complexity
If the adjustment part is integrated with the manual operating element, then the structure is compact, but accidental adjustments of the manual operating element occur during adjustment of the adjustment part
Solution Approach 1:
The adjustment part and manual operating element are segmented as separate components with independent degrees of freedom. The adjustment part rotates about the actuating direction while the manual operating element moves in the actuating direction. This segmentation prevents accidental adjustments by decoupling the adjustment motion from the operating motion.
Solution Approach 2:
The adjustment part and manual operating element have asymmetric movement characteristics: the adjustment part rotates about the actuating direction, while the manual operating element translates in the actuating direction. This asymmetry in movement patterns ensures that adjusting the adjustment part does not inadvertently move the manual operating element.
Data Source
AI summary
In a valve actuating device (1), a bi-stable mechanism (13), by which an auxiliary valve (7) of a pressure-actuatable main valve (2) can be controlled, is set up in such a way that at least one stop point for an open position of the main valve (2) can be adjusted by a rotational movement of a valve element (10) in order to adjust a manual operating element (11) for the auxiliary valve (7).