Valve Safety Device Tangential Force Actuation
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Solution Overview
Problem
Conventional safety devices for valves generate output forces radially with respect to the actuation axis, influencing stationary friction in the bearing and affecting the actuation mechanism, which is undesirable for achieving mono-, bi-, or multi-stability.
Innovation Solution
The safety device directs the output force substantially tangentially with respect to the actuation axis, using a passive mechanical component like a spring to generate a co-force or counter-force, minimizing interference with the actuation mechanism and allowing for secure valve positioning without inadvertently setting or leaving a valve position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the output force is directed radially with respect to the actuation axis, then the safety device can generate the required co-force or counter-force for valve positioning, but the stationary friction in the bearing is influenced and the actuation mechanism is affected
Solution Approach 1:
The patent changes the direction of the output force from radial (parallel to actuation axis) to tangential (perpendicular to actuation axis). This dimensional change in force direction allows the safety device to generate the necessary co-force or counter-force for reliable valve positioning while minimizing interference with the actuation mechanism, as the tangential force does not directly load the axial actuation path
2Stability of the object's composition
If the safety device generates a co-force or counter-force that acts in the actuation direction, then valve position stability is achieved, but unwanted friction is increased and switching between valve positions becomes more difficult
Solution Approach 1:
By orienting the output force tangentially rather than radially, the patent creates a force component that is perpendicular to the actuation direction. This allows the safety device to provide stabilizing co-force or counter-force for valve positioning while the tangential orientation prevents direct addition to the axial actuation effort, reducing the complexity and force required for switching between valve positions
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
This solution reduces unwanted friction and facilitates easy manual or mechanical switching between valve positions by ensuring the co-force or counter-force acts independently of the actuation mechanism, enhancing the stability and usability of the valve system.
Implementation Method 1
the initial force is a spring force of an elastic part of the safety device
Data Source
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AI summary
The device has safety parts (32, 44) cooperating with each other, and mechanically connected with an actuating part (16) and a valve body, respectively. The device produces force or counter force e.g. friction force or shear force, depending on actuating position of the actuating part. The force is directed towards actuating directions (18, 20) or against the actuating direction. The force is generated with force generating devices (62, 63) by output forces (Fal, Far) that are directed transverse to a radial direction (59) of major axis (28) of the actuating direction. An independent claim is also included for a method for securing a valve.