Cage Valve Seat Fastening Ring to Prevent Screw Loosening
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Solution Overview
Problem
Cage valve screw connections are unreliable under vibration and temperature fluctuations, leading to potential loosening and loss of screws.
Innovation Solution
The use of non-round or angular screw means with a securing element that forms a ring-like structure, resting on the head contour of screws connecting the valve seat to the housing, prevents twisting and loosening, utilizing a hexagonal or multi-edged contour for secure rotation-proof locking, and a Z-shaped design with preload force to prevent screw head detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional round screw means are used to fasten the valve seat to the valve housing, then the assembly is simple and easy to manufacture, but the screw connection becomes unreliable under vibration and temperature fluctuations
Solution Approach 1:
The screw means are designed with a non-round, angular outer contour (preferably hexagonal) instead of a conventional round shape. This asymmetric geometry prevents rotational movement of the screws under vibration and temperature fluctuations, thereby preventing loosening while maintaining structural simplicity
Solution Approach 2:
A securing element in the form of a ring structure is introduced as an intermediary component. This ring element rests on the head contour of all screw means and provides additional mechanical constraint against twisting forces, enhancing the reliability of the screw connection without significantly increasing overall device complexity
2Reliability
If the valve seat is screwed to the valve housing using conventional screws, then the fastening process is simple, but the screws may loosen and be lost under vibration conditions
Solution Approach 1:
The angular outer contour of the screw means (hexagonal or multi-edged) inherently prevents rotation and loosening, eliminating the need for additional anti-loosening mechanisms while maintaining ease of assembly
Solution Approach 2:
The securing element ring acts as a mediator that distributes and counteracts twisting forces across all screw heads, providing collective protection against loosening and potential loss under vibration conditions
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to a cage valve (10), comprising a valve housing (14), a valve cage (30), a valve seat (20) and a valve element (12), which cooperates with the valve seat (20) and with the valve cage (30) in order to set the flow cross-section between a valve inlet and a valve outlet, the valve seat (20) having fastening holes (24), through which the valve seat (20) is screwed to the valve housing (14) by means of screwing elements (26). The invention is characterized in that the screwing elements (26) have a non-round or angular outer contour, a securing element (40) being provided, which is designed in such a way that the securing element forms a ring element, which ring element lies at least partly against the head contour of all screwing elements (26) that connect the valve seat (20) to the valve housing (14) and thus prevents rotation of the screwing elements (26).