Tri-eccentric Valve Symmetric Drain-Proof Ring
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Prior art tri-eccentric valves with asymmetric drain-proof rings are difficult to manufacture and require precise alignment for sealing, leading to manufacturing challenges and potential leaks due to slight rotations.
Innovation Solution
A tri-eccentric valve design featuring a symmetric drain-proof ring that can be easily installed without specific angular alignment, allowing for machine-based manufacturing and easy dirt removal through rotation, utilizing a valve body with a trapezoidal annular seat and an asymmetric conical valve disk with a stepped recess for the ring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an asymmetric drain-proof ring is used in prior art tri-eccentric valves, then the sealing performance is improved, but the manufacturing difficulty and installation complexity increase significantly
Solution Approach 1:
The patent applies asymmetry to the valve disk (making it tri-eccentric with three different eccentricities) while maintaining symmetry in the drain-proof ring. This resolves the contradiction by achieving reliable sealing through the asymmetric valve disk geometry without requiring the drain-proof ring to be asymmetric, thereby simplifying its manufacturing while maintaining sealing performance.
2Reliability
If an asymmetric drain-proof ring is used to match the annular seat shape, then the sealing is improved, but the installation precision requirement increases
Solution Approach 1:
The asymmetric sealing function is achieved through the tri-eccentric valve disk geometry rather than through an asymmetric drain-proof ring. The symmetric ring combined with the asymmetric valve disk creates effective sealing while allowing the ring to be installed without precise angular alignment, thus reducing installation precision requirements.
3Ease of manufacture
If a symmetric drain-proof ring is used, then the ease of manufacture and installation is improved, but the sealing performance may be compromised
Solution Approach 1:
The patent compensates for the symmetry of the drain-proof ring by implementing tri-eccentric asymmetry in the valve disk. The three different eccentricities (radial shift, axial shift, and taper angle) create asymmetric sealing surfaces that ensure reliable sealing performance even with a symmetric, easily manufactured drain-proof ring.
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
The symmetric drain-proof ring ensures tight sealing without the need for precise alignment, simplifies manufacturing, and allows for easy maintenance by rotating to remove dirt, while maintaining effective sealing performance.
Implementation Method 1
the drain-proof ring has preferred flexibility, which can compensate the gap due to the deformation
Data Source
AI summary
A tri-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 and thus is easy to be installed to the valve disk without to align the drain-proof ring to a specific angle. Furthermore, it can be designed by computers and is manufactured by machines. When dirt accumulates on the drain-proof ring, it can remove the dirt by directly rotating the drain-proof ring.