Swing Check Valve Flapper Hinge for Airtight Sealing
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Solution Overview
Problem
Traditional swing check valve designs face challenges with hinged connections that are impractical for smaller sizes, leading to difficulties in creating an airtight seal and potential leaks due to machining complexities and reliance on separate rivets for connecting the flapper door assembly.
Innovation Solution
A unique spring clip design provides a hinged connection between the flapper door assembly and valve body, replacing machined pin holes, and an integrated sealing gasket with a metal core and integrated stem, eliminating the need for separate rivets and allowing for easier assembly and airtight sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional hinged connection with separate rivets is used, then the flapper door assembly can be connected to the valve body, but the sealing reliability deteriorates and leaks occur due to machining complexities and connection reliability issues
Solution Approach 1:
The patent combines the hinge pin and sealing gasket into a single integrated component. The hinge pin includes an integrated sealing gasket formed as one piece, eliminating the need for separate rivets to connect the flapper door assembly to the valve body. This integration resolves the sealing reliability issues caused by multiple separate components and their complex connections.
Solution Approach 2:
The patent extracts the sealing function from the separate rivet connection and integrates it directly into the hinge pin itself. The sealing gasket is formed as an integral part of the hinge pin, removing the need for separate sealing components and their associated machining complexities.
2Ease of operation
If pin holes are machined directly into the valve body for hinged connection, then the flapper door assembly can be hinged, but manufacturing difficulty increases particularly for smaller valves due to the need for elongated pin holes
Solution Approach 1:
Instead of machining pin holes into the valve body and then attaching separate components, the patent inverts the approach by making the hinge pin itself the mounting component that attaches directly to the valve body. The integrated sealing gasket on the hinge pin provides the connection and sealing function simultaneously, eliminating the need for complex elongated pin hole machining.
3Reliability
If separate rivets are used to buck the hinge to the sealing gasket, then the flapper door assembly can be constructed, but connection reliability deteriorates as valve size is reduced due to compact design requirements
Solution Approach 1:
The patent merges the hinge pin and sealing gasket into a single integrated component. This eliminates the need for separate rivets to connect these parts, which becomes increasingly unreliable as valve size decreases. The integrated design maintains connection reliability in compact valves by removing the intermediate connection step that is prone to failure in small-scale applications.
Data Source
AI summary
The disclosure relates generally to the field of valves, and, more particularly, to a unique swinging door check valve having an improved swinging flapper door and sealing gasket design.