Rigid Plastic Reinforced Pipe Seal for Stable Rieber Joint Assembly
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Solution Overview
Problem
Existing pipe seals for Rieber joints lack stability and reliability due to the use of non-reinforced, flexible gaskets, which can lead to leakage and dislodgement during pipe insertion, and require special metal-based reinforcement that may contain lead and necessitate complex bonding processes.
Innovation Solution
A pipe seal comprising an annular sealing member with a completely embedded annular reinforcing member made of a rigid plastic band, featuring protrusions and/or recesses to increase contact area, providing enhanced adhesion and stability without the need for metal-based reinforcement or specialized adhesives, thus simplifying manufacturing and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a non-reinforced flexible gasket is used, then the ease of manufacture is improved, but the reliability and stability deteriorate due to leakage and dislodgement during pipe insertion
Solution Approach 1:
The patent combines a rubber sealing member with a rigid plastic reinforcing member (made of PP, PE, or PA) to create a composite seal structure. This composite design provides both the flexibility needed for sealing and the rigidity needed for stability during insertion, eliminating the need for metal reinforcement while improving reliability
Solution Approach 2:
The patent changes the material parameters by using rigid plastic (with specific hardness and modulus values) instead of metal for the reinforcing member. The rubber component maintains its elastic properties while the plastic component provides structural stability, achieving both ease of manufacture and high reliability
2Stability of the object's composition
If a metal-based reinforcing member is used, then the stability is improved, but the harmful factors increase due to lead leaks and the device complexity increases due to bonding requirements
Solution Approach 1:
The patent extracts the harmful metal component (specifically lead-containing materials) from the reinforcing member and replaces it with rigid plastic materials. This eliminates lead leakage risks while maintaining the stability function, and removes the need for special bonding adhesives between metal and rubber
Solution Approach 2:
The patent creates a composite structure using rubber and rigid plastic materials that are compatible and can be directly bonded without additional adhesives. The plastic reinforcing member embeds the rubber sealing member through direct integration, eliminating harmful metal materials and simplifying the overall structure
3Stability of the object's composition
If a metal-based reinforcing member with bonding adhesive is used, then the stability is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges the reinforcing member and sealing member into a single integrated composite component. The rigid plastic reinforcing member and rubber sealing member are directly bonded through material compatibility and structural integration, eliminating the need for separate bonding adhesive layers and simplifying manufacturing
Solution Approach 2:
The patent uses compatible rubber and plastic materials that can be directly bonded without additional adhesives. The composite structure allows direct integration of the reinforcing and sealing functions in one component, reducing device complexity and manufacturing steps
Data Source
AI summary
The invention refers to a pipe seal suitable for use in a Rieber joint, the seal (14) comprising an annular sealing member (18) and an annular reinforcing member (20) completely embedded in the sealing member (18). The reinforcing member (20) is made of a rigid plastic band and the reinforcing member (20) includes, for increasing an area of contact between the sealing member (18) and the reinforcing member (20), at least one protrusion (24) and/or at least one recess (26).