Check Valve Ball Stop for Controlled Gasket Compression
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Solution Overview
Problem
Positive displacement pumps used in sanitary applications face challenges with easy disassembly and reassembly to minimize maintenance downtime, as existing check valves can lead to over-compression of gaskets, distorting their sealing function and potentially damaging them.
Innovation Solution
A check valve design featuring a ball stop that limits gasket compression, preventing over-tightening by engaging the valve cover and housing to stop further tightening, thus protecting the gasket from damage and ensuring proper sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the valve cover is tightened to ensure proper sealing, then the sealing function is improved, but the gasket may be over-compressed and distorted, compromising the sealing function and potentially damaging the gasket
Solution Approach 1:
The ball stop acts as an intermediary element between the valve cover and valve housing, providing a mechanical stop that prevents over-compression of the gasket while allowing sufficient compression for sealing. The ball stop engages with the valve housing to limit the maximum compression distance.
Solution Approach 2:
The invention changes the physical state of the system by introducing a mechanical stop that alters the compression parameter of the gasket. The ball stop ensures the gasket is compressed to the optimal degree without exceeding it, transforming the sealing process from one risking over-compression to one with controlled compression.
2Reliability
If the valve cover is tightened to ensure proper sealing, then the sealing function is improved, but maintenance downtime increases due to difficulty in disassembly and reassembly
Solution Approach 1:
The ball stop serves as a mechanical indicator that clearly signals when proper tightness is achieved. This eliminates guesswork during assembly and disassembly operations, allowing maintenance personnel to quickly determine when the valve cover is properly secured without requiring complex tools or procedures.
Solution Approach 2:
The ball stop provides self-indicating functionality, automatically showing when the gasket is properly compressed and when further tightening would be harmful. This self-service feature eliminates the need for external measurement tools or specialized knowledge during maintenance operations.
3Object-affected harmful factors
If a ball stop is added to prevent over-compression of the gasket, then the gasket protection is improved, but the device complexity increases
Solution Approach 1:
The ball stop serves multiple functions simultaneously: it acts as a mechanical stop to prevent over-compression, provides a clear visual and tactile indicator of proper tightness, and engages with existing components in the valve assembly. This multi-functionality justifies the addition with minimal increase in overall complexity.
Solution Approach 2:
The ball stop is a simple, inexpensive component that can be easily manufactured and replaced if necessary. Its simplicity and low cost mean that even if it wears or becomes damaged, replacement is straightforward and does not require specialized tools or procedures.
Data Source
AI summary
This disclosure concerns a check valve that prevents over compression of a gasket. The check valve comprises a valve housing, a valve cover, and a gasket that seals between the valve housing and the valve cover. A ball fits within the valve housing. The check valve further comprises a ball stop that limits compression of the gasket as the valve cover is tightened with respect to the valve housing. The ball stop serves as a standoff between the valve housing and the valve cover that allows some compression of the gasket as the valve cover is tightened with respect to the valve housing, but at some degree of tightening the incompressible engages both the valve cover and the valve housing to prevent further tightening. Over-compression distorts the gaskets, possibly compromising its sealing function and possibly damaging the gasket.