Double-Walled Support Ring for Polymer Pipe Sealing
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Solution Overview
Problem
The existing support rings for sealing rings in polymer pipes face challenges with manufacturing tolerances, leading to unreliable seating and increased risk of leaks or loss due to insufficient support and stiffness, making it difficult to insert and maintain the support ring within the bead.
Innovation Solution
A double-walled support ring design with an annular space open on one side, allowing radial deflection and flexibility for insertion, and a beveled surface to enhance seating, combined with webs for stability and a specific material with appropriate elasticity, ensures secure positioning and increased pull-out strength without compromising insertability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the support ring is made stiffer and more resistant to deformation, then the pull-out strength is improved, but the ease of insertion into the bead deteriorates
Solution Approach 1:
The support ring is divided into two separate walls (first wall and second wall) with an annular space between them, creating a segmented structure that allows independent deformation of each wall during insertion while maintaining overall structural integrity for pull-out resistance
Solution Approach 2:
The double-walled construction with annular space enables dynamic deformation during insertion, where the walls can flex and deflect radially to navigate the bead geometry, then stabilize to provide rigid support against pull-out forces
2Reliability
If the support ring is made stiffer to increase resistance to deformation, then the sealing ring support is improved, but the difficulty of introducing the support ring into the bead increases
Solution Approach 1:
The thin-walled construction with annular space creates a flexible structure that can deform radially during insertion to conform to the bead geometry, while maintaining sufficient stiffness to provide reliable support for the sealing ring against push-out forces
3Ease of manufacture
If the bead width has manufacturing tolerances of a few millimeters, then the manufacturing flexibility is improved, but the reliability of sealing ring seating deteriorates
Solution Approach 1:
The support ring's double-walled structure with annular space allows it to adapt to varying bead widths within tolerance ranges by deforming radially, maintaining reliable sealing ring seating across different bead dimensions without requiring precise manufacturing control
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 provides improved resistance against the sealing ring being pushed out while allowing easier insertion and maintaining a secure, leak-proof connection, optimizing the balance between insertability and pull-out strength.
Implementation Method 1
the possibility of radial deflection of the outer annular wall relative to the inner annular wall is created, so that a corresponding flexibility for introducing the support ring into the bead is achieved
Implementation Method 2
due to the possibility of inward springing of the outer annular wall a kind of jamming of the support ring in the bead is effected
Data Source
Figure 1~4
AI summary
The pipe has a coupler, which has a crimp (2) with a back-up ring (3) inserted into the crimp. The outer circumference surface of the back-up ring and the inner surface of the crimp interacting with the outer circumference surface regarding a tubing axle (14) are cylindrically formed. The outer diameter of the back-up ring and the inner diameter of crimp are coordinated in such a manner that the back-up ring is held with a radial pre-loading in the crimp. The back-up ring is made of polymer material, particularly polypropylene, polyethylene or polyvinyl chloride.