Valve Cock Seal Insert for Leak-Tight Small Valves
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Solution Overview
Problem
Existing valve cocks, especially in small-sized valves, face issues with maintaining fluid-tightness due to loosening of external members, leading to potential leakage and compromised sealing functions.
Innovation Solution
A cock design featuring a body with a movably mounted seat, equipped with a seal fastened by an insert that holds the seal under compression, ensuring reliable fastening and prevention of leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an external member is used to hold the gasket in position, then the sealing function is improved, but the external member may loosen after prolonged use, compromising the sealing reliability
Solution Approach 1:
The invention extracts the problematic external member from the sealing assembly and replaces it with an integrated insert that is part of the cock body. The insert is designed with a geometry that automatically retains the gasket through compression and geometric constraints, eliminating the loosening issue of external members while maintaining sealing reliability.
Solution Approach 2:
The insert is merged with the cock body as an integrated component, combining the functions of gasket retention and structural support. This integration ensures that the retention mechanism cannot loosen independently, as it is structurally unified with the body, thereby resolving the position stability issue.
2Reliability
If the clearance between valve body and rotatable cock is minimized, then fluid-tightness is improved, but the sealing function is compromised in small-sized valves due to loosening
Solution Approach 1:
The insert acts as an intermediary component between the cock body and the gasket, providing a reliable retention mechanism that does not require complex external members. The insert's design allows for simple integration while effectively maintaining the gasket in position, thus improving fluid-tightness without significantly increasing device complexity.
3Reliability
If a gasket is provided on the cock to prevent leakage, then sealing is improved, but the gasket position may change or the external member may protrude radially, affecting long-term sealing
Solution Approach 1:
The invention extracts the gasket retention function from the external member and transfers it to the insert integrated in the cock body. This design prevents gasket position changes and radial protrusion by providing a stable, integrated retention mechanism, thereby improving long-term sealing reliability and ease of maintenance.
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 solution effectively prevents leakage by ensuring the seal is reliably fastened to the body, maintaining fluid-tightness even in small-sized valves, and allowing for easy replacement of worn seals.
Implementation Method 1
the insert holds at least a portion of the seal under compression load
Data Source
Figure 1
Figure 2A~2B
Figure 3~4
AI summary
A cock (100) for a valve having at least one opening for passage of fluid, the cock comprising a body (110) configured to be movably mounted in a seat of the valve, at least one seal (130) fastened to the body (110) and configured to variably open or close the opening according to a position of the cock within the valve seat, wherein the seal (130) is fastened to the body (110) by an insert (140) fitted between the seal (130) and the body (110). A valve, in particular a three-way valve and/or a changeover valve, comprising such a cock.