Valve Core Stop Structure to Reduce Seal Impact Wear
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Solution Overview
Problem
The sealing effectiveness of valve devices deteriorates over time due to wear caused by the valve core striking the valve port portion during closure.
Innovation Solution
A valve device design that includes a screw rod assembly with a first abutting portion and a valve core assembly with a second abutting portion, where the first abutting portion abuts against the second abutting portion in the axial or circumferential direction to limit the lowermost position of the valve core assembly, preventing impact with the valve port portion and reducing wear on the sealing portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the valve core assembly directly strikes the valve port portion to close the valve, then the valve closure function is achieved, but the sealing portion wears over time compromising sealing effectiveness
Solution Approach 1:
The patent introduces an intermediary mechanism (the abutting portion interaction between screw rod assembly and valve core assembly) that mediates the closure action. Instead of direct impact between the sealing portion and valve port portion, the abutting portions engage first to limit the valve core assembly's position, preventing direct striking and reducing wear on the sealing portion while still achieving effective valve closure.
2Ease of operation
If the valve core assembly is allowed to move freely to close the valve, then the valve closure function is achieved, but impact damage occurs to the sealing portion
Solution Approach 1:
The patent implements preliminary action by providing abutting portions that engage before the valve core assembly reaches its final closed position. The first abutting portion on the screw rod assembly and the second abutting portion on the valve core assembly interact in advance to limit the lowermost position of the valve core assembly, preventing the harmful impact from occurring in the first place while still allowing complete valve closure.
Data Source
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AI summary
A valve device (100). A sealing portion (21) of a valve core assembly (20) abuts against a valve port portion (40) when the valve core assembly (20) is at a first working position, and a first abutting portion (12) of a screw assembly (10) abuts against a second abutting portion (22) of the valve core assembly (20) in the axial direction or the circumferential direction so as to limit the impact between the valve core assembly (20) and the valve port portion (40).