Triple Eccentric Valve Symmetric Drain-Proof Ring Design
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Solution Overview
Problem
The existing triple eccentric valve with an asymmetric drain-proof ring faces manufacturing difficulties due to precise shape requirements and alignment issues, leading to potential fluid leakage and sealing failures, especially when dirt accumulates.
Innovation Solution
A triple eccentric valve design featuring a symmetric drain-proof ring that applies only tangent force to the valve seat, allowing for easier installation and manufacturing, and enabling self-cleaning by rotating the ring to remove dirt without disrupting the seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an asymmetric drain-proof ring is used to tightly seal the valve seat, then sealing effectiveness is improved, but manufacturing precision and installation alignment become extremely difficult
Solution Approach 1:
The patent applies asymmetry in reverse - it uses a symmetric drain-proof ring design to eliminate the manufacturing and installation difficulties caused by asymmetric rings. The symmetric ring with its uniform cross-section and consistent radius allows for easy manufacturing and installation without requiring precise alignment, while still achieving effective sealing through the eccentric valve disk design and flexible seal engagement with the valve seat.
2Reliability
If an asymmetric drain-proof ring is used to tightly seal the valve seat, then sealing effectiveness is improved, but installation alignment becomes extremely difficult
Solution Approach 1:
The patent resolves the installation alignment difficulty by employing a symmetric drain-proof ring design. The ring's symmetry about its center axis allows it to be installed in any rotational position without compromising sealing effectiveness, eliminating the need for precise angular alignment during installation while maintaining reliable sealing performance.
3Reliability
If the drain-proof ring resists against the valve seat to maintain seal, then sealing effectiveness is improved, but the valve seat distorts over time
Solution Approach 1:
The patent uses a flexible drain-proof ring made of elastomeric material that can deform and conform to the valve seat surface. This flexibility allows the ring to maintain sealing effectiveness through elastic deformation rather than rigid resistance, thereby preventing distortion of the valve seat while ensuring reliable sealing performance.
4Object-generated harmful factors
If the drain-proof ring pushes dirt material to compress the valve seat, then dirt removal is achieved, but the sealing effect is destroyed
Solution Approach 1:
The patent enables the drain-proof ring to self-clean by rotating with the eccentric valve disk. The rotational motion allows the flexible ring to scrape and remove dirt and debris from its sealing surface automatically during valve operation, maintaining sealing effectiveness without requiring external cleaning mechanisms or compromising the seal.
Data Source
AI summary
A triple eccentric valve with a symmetric drain-proof ring includes a valve body, a stem, a valve disk, a waterproof washer, and a drain-proof ring. The valve disk is formed as an asymmetric conical shape. The drain-proof ring is an O ring and is arranged in a stepped recess of the valve disk to seal the waterproof washer; the drain-proof ring is symmetric to the axis of the ring. In assembly state, a periphery of the drain-proof ring resists against an inner wall of the annular seat. The drain-proof ring is symmetrical. Furthermore, an inner side or a part of the valve seat has a shape matched to a sweeping track of an outermost point of the drain-proof ring so that when the drain-proof ring moves along the valve seat, only force tangent to the inner side of the valve seat is applied from the drain-proof ring to the valve seat.