Stabilized Check Valve Hinge Structure for Dynamic Flow Wear
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Solution Overview
Problem
Check valves experience dynamic loads due to turbulent flow conditions, leading to rapid opening and closing, chattering, vibrations, instability, and premature wear of components, particularly the pin and valve body, under dynamic flow conditions.
Innovation Solution
A check valve design featuring a hanger and clapper with increased surface area mating interfaces and setting members to restrict pin movement, stabilizing the clapper position and reducing wear by distributing stress to replaceable components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the check valve operates under dynamic flow conditions, then the valve can handle turbulent flow and rapid pressure changes, but the dynamic loads cause rapid opening and closing, chattering, and vibrations
Solution Approach 1:
A damping element is introduced as an intermediary component between the clapper and the valve body. This damping element absorbs and dissipates the dynamic loads and vibrations generated during operation, mediating the interaction between the moving clapper and the fixed valve body, thereby reducing chattering and vibrations while maintaining the ability to handle dynamic flow conditions
2Productivity
If the check valve is exposed to dynamic loads, then it can function under turbulent flow, but the dynamic loads cause premature wear of components, particularly the pin and valve body
Solution Approach 1:
A damping element is pre-installed in the valve body to provide cushioning protection before damage occurs. This element is positioned to absorb and dissipate dynamic loads and vibrations during operation, protecting the pin and valve body from premature wear and fatigue failures before they can occur
Solution Approach 2:
The damping element is designed as a replaceable component that can be easily replaced when worn. By making this protective element disposable and replaceable, the expensive valve body and pin are protected from wear, and only the inexpensive damping element needs periodic replacement, maintaining reliability while enabling continuous operation under turbulent flow conditions
3Ease of operation
If the clapper is rotatably connected to the hanger, then the clapper can move between open and closed positions, but the pin enabling movement experiences additional stresses and premature wear
Solution Approach 1:
The damping element acts as an intermediary that absorbs and dissipates the dynamic loads and vibrations transmitted through the pin during clapper movement. By placing this damping element in the load path, the pin experiences reduced cyclic stresses and vibrations, thereby extending its service life while maintaining full clapper movement capability between open and closed positions
Data Source
AI summary
In some implementations, a check valve may include a valve body, a hanger configured in the valve body and including a bore, a clapper rotatably connected to the hanger, wherein the clapper is configured to rotate between a closed position and an open position, a pin configured within the bore to rotatably connect the hanger and the clapper, wherein the pin is configured parallel to an axis of the bore, and first and second setting members configured at respective first and second opposite ends of the pin, wherein the first and second setting members are configured to at least partially restrict movement of the pin in respective first and second opposite directions parallel to the axis of the bore.