Valve Bonnet Spindle Automatic Closure via Spring Prestress
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Solution Overview
Problem
Existing upper valve parts lack automatic closure functionality and optimal space utilization, often experiencing material fatigue due to frequent impacts and requiring additional space for stop profiles.
Innovation Solution
The spindle is prestressed in the closing direction by a spring element, allowing the control disc to automatically return to its original closed position, with features like a double torsion spring and inclined central axis to enhance force introduction and space efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the valve is designed with stop profiles to limit spindle rotation, then the maximum rotation angle is controlled, but material fatigue occurs due to frequent impacts and additional space is required
Solution Approach 1:
The spring element is pre-tensioned to exert a closing force on the spindle before operation. This preliminary action ensures that the spindle is constantly pushed toward the closed position, eliminating the need for stop profiles to limit rotation and preventing material fatigue from impact forces.
Solution Approach 2:
The valve design transitions from a static system with fixed stop profiles to a dynamic system where the spring element continuously applies force. The spindle can rotate freely within the spring's elastic range, converting the rigid stop mechanism into a flexible, fatigue-free dynamic system.
2Reliability
If the valve is designed without stop profiles to eliminate material fatigue, then reliability improves, but the maximum rotation angle cannot be controlled and the valve occupies more space
Solution Approach 1:
The spring element is pre-tensioned during assembly to establish a predetermined closing force. This preliminary action defines the operational range of the spindle without requiring physical stops, eliminating the need for additional space while maintaining reliability.
Solution Approach 2:
The design changes the controlling parameter from geometric stops to spring force characteristics. By adjusting spring parameters (stiffness, pre-tension), the maximum rotation angle is controlled through force balance rather than physical constraints, reducing the valve's overall volume.
3Device complexity
If a single-leg spring is used to prestress the spindle, then the structure is simpler, but the force introduction is not linear and guidance is poor
Solution Approach 1:
The spring system is divided into two identical legs that work in parallel. Each leg contributes equally to the closing force, creating a balanced, linear force application. This segmentation also provides inherent guidance as the two legs constrain the spindle's movement path.
Solution Approach 2:
The double-leg spring configuration creates a symmetric force system where the two legs act as counterbalancing elements. This symmetry ensures linear force introduction and stable guidance of the spindle throughout its rotation range.
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
Enables automatic closure with increased pivoting angle and minimal installation space, reducing material fatigue and improving the valve's operational reliability and aesthetics.
Implementation Method 1
the spindle is prestressed in the closing direction of the control disc via at least one spring element
Implementation Method 2
the at least one spring element comprises a torsion spring, which is preferably designed as a double torsion spring
Implementation Method 3
the spindle has a spherical portion on which the pin is arranged
Implementation Method 4
The sealing rings are preferably designed as O-rings
Data Source
Figure 1a~1b
Figure 2a~2c
Figure 3a~4b
AI summary
The invention relates to a valve bonnet having a head piece (1) in which a spindle (2) is arranged and which rests on a disk guide (3) and engages, via a pin (28), a control disk (4) guided in the disk guide (3). Said control disk is in contact with a rotationally fixed passage disk (5) that has at least one passage opening (52). The spindle (2) has a spherical portion (23) on which the pin (28) is arranged, the spindle (2) being pretensioned in the closing direction of the control disk (4) by at least one spring element.