Quick Tube Coupling Seal Geometry for Low-Leak Disconnection
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Solution Overview
Problem
The quick connection coupling valve assembly experiences significant liquid leakage during disengagement due to a large space between the sealing members of the male and female connectors.
Innovation Solution
A tube coupling design featuring a male connector with a first pipe and an insertion part, and a female connector with a second pipe and an insertion receiving part. The insertion part includes a first spring, a first pressing member, a first seal member, and a first outer peripheral member, while the insertion receiving part includes a second spring, a second pressing member, a second seal member, and a second outer peripheral member. The second seal member has a smaller outer diameter than the first seal member, allowing for a tapered configuration that reduces liquid leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sealing members are positioned to ensure sealing, then sealing performance is improved, but liquid leakage occurs due to large space between sealing members during disengagement
Solution Approach 1:
The patent applies asymmetry by making the outer diameter of the second seal member smaller than that of the first seal member. This creates a tapered configuration where the sealing surfaces are not symmetric, allowing the sealing members to maintain close contact during disengagement and prevent liquid leakage while ensuring reliable sealing during connection.
Solution Approach 2:
The patent implements local quality by providing different outer diameters for the first and second seal members at different locations along the coupling assembly. The first seal member has a larger outer diameter for initial connection sealing, while the second seal member has a smaller outer diameter to reduce the gap and prevent leakage during disengagement, optimizing sealing performance at each stage.
2Object-generated harmful factors
If sealing members are positioned close to each other, then liquid leakage is reduced, but sealing reliability may be compromised
Solution Approach 1:
The asymmetric design with different outer diameters for the two seal members allows them to be positioned at different distances from each other while maintaining effective sealing. The larger first seal member provides robust sealing during connection, while the smaller second seal member positions closer to prevent leakage during disengagement, balancing both requirements.
Solution Approach 2:
The patent changes the parameter of outer diameter between the two seal members, creating a tapered geometry. This parameter variation allows the sealing members to maintain appropriate spacing for reliability while the smaller second seal member reduces the gap to minimize leakage during disengagement.
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 tube coupling effectively reduces liquid leakage during disengagement by minimizing the space between the sealing members through the use of a smaller outer diameter for the second seal member, thereby enhancing the sealing efficiency.
Implementation Method 1
a first spring (7), a first pressing member (9) having a protruding shape protruding in the axial direction, the first pressing member being biased outward in the axial direction by the first spring (7) in a state where the male connector (1) is not inserted into the female connector (2)
Implementation Method 2
a second spring (11), a second pressing member (13) having a protruding shape protruding in the axial direction, the second pressing member (13) being biased outward in the axial direction by the second spring (11)
Data Source
AI summary
A tube coupling is configured to connect and couple two tubes that are configured to cause a fluid to flow inside the two tubes. The tube coupling includes: a male connector including a first pipe configured to cause the fluid to flow inside the first pipe, and an insertion part having a protruding shape protruding in an axial direction that is an insertion direction; and a female connector including a second pipe configured to cause the fluid to flow inside the second pipe, and an insertion receiving part having a recessed shape recessed in the axial direction and coupled to the insertion part when the insertion part is inserted into the insertion receiving part. The insertion part includes a first spring, a first pressing member having a protruding shape, a first seal member having an annular shape, and a first outer peripheral member surrounding the first pressing member.