Friction-Free Replaceable Check Valve Insert Assembly
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Solution Overview
Problem
Existing check valves require overcoming friction between the valve assembly and seals, making inspection and replacement cumbersome and often necessitating specialized tools.
Innovation Solution
The insert check assembly is designed to be freely inserted or removed from the inlet body without friction, featuring a self-aligning mechanism and seals that can be easily replaced, allowing for tool-free inspection and replacement without lubricant, utilizing a poppet with a coil spring and annular seals for axial movement between open and closed positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the valve assembly uses seals within the valve body to ensure sealing, then sealing reliability is improved, but friction between the valve assembly and seals increases making inspection and replacement cumbersome
Solution Approach 1:
The valve assembly is divided into a stationary valve body and a movable insert check assembly. The insert check assembly can be independently removed from the valve body without disturbing the seals that remain in the valve body, allowing easy inspection and replacement while maintaining sealing reliability.
Solution Approach 2:
The sealing function is extracted from the movable valve assembly and retained in the stationary valve body. The insert check assembly is designed to be removable without the seals, eliminating friction between moving parts and seals while maintaining the sealing interface in the fixed body.
2Reliability
If the valve assembly uses friction-based sealing between the valve assembly and seals, then sealing effectiveness is improved, but specialized tools are required for replacement
Solution Approach 1:
The valve assembly is segmented into a stationary sealed body and a removable insert check assembly. The seals remain in the valve body and do not move with the insert assembly, allowing the insert to be replaced without specialized tools while maintaining effective sealing through the stationary seal interface.
3Reliability
If the valve assembly requires overcoming friction for insertion and removal, then sealing contact is improved, but maintenance time increases
Solution Approach 1:
The valve system is divided into a stationary valve body containing the seals and a removable insert check assembly. This segmentation allows the insert assembly to be quickly inserted and removed without overcoming friction with seals, significantly reducing maintenance time while maintaining reliable sealing contact through the stationary seal interface.
Solution Approach 2:
The friction-generating interaction between moving parts and seals is extracted by keeping the seals stationary in the valve body while allowing the insert check assembly to move independently. This eliminates the time-consuming friction-overcoming process during maintenance while preserving effective sealing contact.
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
Facilitates fast and tool-free inspection and replacement of the insert check assembly, ensuring self-alignment during field installation and eliminating the need for lubricants, thereby simplifying maintenance and reducing contamination risks.
Implementation Method 1
a first seat on a poppet having a coil spring engaging the bottom side of a second seat allowing the first seat to move axially
Data Source
AI summary
A check valve has a friction-free replaceable valve insert check assembly. The check assembly includes a poppet on which a spring is mounted engaging an axially moveable seat which in turn engages a seat on the inner end of the poppet biased into engagement by the spring. Upon separation of the inner and outer valve bodies the insert check assembly will freely separate from the valve body for inspection or replacement.