Degassing Tube Bundle Structure With Protruded Ends for Sealing
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Solution Overview
Problem
The bundling strength of fluororesin tubes is limited by their cylindrical end portions, which restricts the density of the bundling structure and thus the overall strength of the tube bundle.
Innovation Solution
Incorporating protrusions on the tube wall portions that extend radially outward, allowing for denser arrangement of the tube ends and improving bundling strength, while a sealing portion reduces fluid leakage through an outer sheath.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If cylindrical end portions are used for fluororesin tubes, then the structure is simple and easy to manufacture, but the bundling strength is limited due to restricted density of the bundling structure
Solution Approach 1:
The patent applies asymmetry by changing the end portion shape from a simple cylinder to an asymmetric structure with a protrusion. The protrusion extends in the tube axial direction and has a cross-sectional area larger than the tube inner cross-section, creating an asymmetric geometry that enables denser bundling arrangement while maintaining manufacturing feasibility through molding processes
2Quantity of substance
If end portions are arranged to form a fine structure, then space utilization improves, but the density is limited by the cylindrical shape
Solution Approach 1:
The patent applies dimensionality change by adding the protrusion feature that extends in the axial direction (adding height dimension) to the end portion structure. This allows tubes to be arranged more densely in the radial direction while the protrusions interlock, achieving both higher tube density and stronger bundling strength simultaneously
3Strength
If protrusions are added to tube end portions, then bundling strength and density improve, but manufacturing complexity increases
Solution Approach 1:
The patent applies merging by combining the protrusion feature with the tube end portion itself, making the protrusion an integral part of the tube structure formed in one molding process. This eliminates the need for separate manufacturing steps for the protrusion, reducing overall manufacturing complexity while achieving improved bundling strength
Data Source
AI summary
A tube unit includes multiple tubes and bundling portions that bundle end portions of respective tubes at opposite ends of the tubes. At least one of the end portions of respective tubes has a tube wall portion that tubularly extends in an extension direction of the tubes and also has a protrusion protruding radially outward from the tube wall portion.