Staggered Nut Fastening for Uniform Pipe Segment Coupling
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Solution Overview
Problem
Existing pipe rehabilitation methods face challenges in achieving uniform coupling strength in the pipe length direction due to insufficient linking member distribution, leading to increased man-hours and costs.
Innovation Solution
The method involves securing nuts along the circumferential direction of pipe segments and using offset nut positions to stagger fastening members, ensuring uniform connection strength in the pipe length direction by screwing fastening members into these nuts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If linking members are used to connect segments in the pipe length direction, then segments can be coupled together, but the coupling strength becomes non-uniform in the circumferential direction at locations where no linking member exists
Solution Approach 1:
The linking members are divided into multiple segments along the circumferential direction, with each segment having linking members positioned at different circumferential locations. This segmentation allows the coupling strength to be distributed uniformly around the circumference rather than concentrated at single points.
Solution Approach 2:
Multiple linking members are combined to form a single integrated structure that spans across multiple segments. The linking members extend over both side plates of adjacent segments and are mutually linked to create a continuous connection that provides uniform coupling strength throughout the circumferential direction.
2Stability of the object's composition
If many segments are used in the circumferential direction to increase coupling strength uniformity, then coupling strength becomes more uniform, but man-hours and costs increase
Solution Approach 1:
The linking members are designed to serve multiple functions simultaneously: they provide coupling strength across segments, distribute load uniformly in the circumferential direction, and can be installed as a single integrated component rather than multiple separate components. This multi-functionality reduces the number of segments needed while maintaining uniform coupling strength.
Data Source
AI summary
Segments are linked in the circumferential and pipe length directions to assemble a rehabilitating pipe inside an existing pipe in order to rehabilitate the existing pipe. A plurality of nuts are secured to the segments along the circumferential direction thereof. A fastening member having a screw part is provided which is screwed into the nut to fasten a first segment to a second segment to which the nut is secured, thereby linking the first and second segments in the pipe length direction thereof. The position of the nut in the first segment is offset as viewed in the circumferential direction from the nut position of the second segment. The arrangement of the fastening members and the nuts is staggered as viewed in its entirety. This allows the connection strength of the segments in the pipe length direction to be made uniform.