Serrated Pipe-Flange Joint for Weld-Free Compact Connections
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Solution Overview
Problem
Existing pipe connection devices require welding, leading to increased size and potential quality issues due to welding dispersion, and necessitate additional space and time for serration formation.
Innovation Solution
A pipe connection device design featuring a pipe with perpendicular extensions and a flange with a serrated coupling hole, allowing secure joining without welding, reducing size and eliminating welding-related issues while enhancing joining force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If welding is used to join the pipe and pipe joint, then the joining strength is improved, but the device size increases and quality problems occur due to welding dispersion
Solution Approach 1:
The patent replaces the welding process with a mechanical interference fit system. The coupling hole includes a serration portion with teeth that engage with corresponding teeth on the pipe, creating a mechanical interlocking connection instead of relying on thermal welding processes. This substitution eliminates the need for large welding areas while maintaining joining strength.
Solution Approach 2:
The patent changes the joining mechanism from thermal-welding-based to mechanical-fit-based. By modifying the coupling hole geometry to include serrations and changing the joining method from fusion to interference fit, the patent achieves strong connections without the size penalties and quality issues associated with welding dispersion.
2Strength
If welding is used to join the pipe and pipe joint, then the joining strength is improved, but quality problems occur due to welding dispersion
Solution Approach 1:
The patent replaces the welding process with a mechanical interference fit system. The coupling hole includes a serration portion with teeth that engage with corresponding teeth on the pipe, creating a mechanical interlocking connection instead of relying on thermal welding processes. This substitution eliminates the need for large welding areas while maintaining joining strength.
Solution Approach 2:
The patent changes the joining mechanism from thermal-welding-based to mechanical-fit-based. By modifying the coupling hole geometry to include serrations and changing the joining method from fusion to interference fit, the patent achieves strong connections without the size penalties and quality issues associated with welding dispersion.
3Volume of moving object
If the pipe is extended perpendicularly, then the space occupation is reduced, but the structural complexity increases
Solution Approach 1:
The patent utilizes perpendicular extension of the pipe to optimize spatial arrangement. By extending the pipe in a direction perpendicular to the flange rather than linearly, the device achieves compact three-dimensional configuration, reducing overall space occupation while the modular design keeps structural complexity manageable.
4Productivity
If the serration is included only in part of the joining hole, then the manufacturing time and cost are reduced, but the joining force may be insufficient
Solution Approach 1:
The patent applies the serration structure selectively only in the first part of the coupling hole rather than the entire circumference. This localized serration design provides sufficient joining force at the critical engagement zone while significantly reducing the time and cost required to form the serration compared to creating it around the entire hole perimeter.
Data Source
AI summary
A pipe connection device may include a pipe and a flange. The pipe may include a first region and a second region extended perpendicularly to the first region. The flange may include a coupling hole into which at least a portion of the second region of the pipe is joined. The coupling hole may include a first part and a second part. The first part may include a serration and be extended in parallel with a thickness direction of the flange. The second part may include an inclined surface formed to be inclined based on the thickness direction of the flange, and be extended from the first part to one side surface of the flange.