Drain Pipe Sealing Ring Geometry for Stable Insertion Sealing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing pipe connection assemblies with circular sealing rings are prone to displacement during insertion, leading to faulty seals due to the lack of a stable sealing mechanism.
Innovation Solution
A pipe connection assembly featuring a sealing ring with a non-circular cross-sectional shape, including longitudinal ribs and a curved flange, where the slanting surface ends in a tip and the abutment surface has a smaller angle, facilitating easy insertion and compression to ensure a secure seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a circular sealing ring is used in prior art connections, then the sealing ring can be easily inserted into the groove, but the sealing ring may be displaced before or during insertion, causing a faulty seal
Solution Approach 1:
The sealing ring is designed with an asymmetric cross-sectional shape featuring a slanting surface that ends in a tip. This asymmetric geometry prevents rotational displacement during insertion while the tip facilitates easy insertion into the groove, resolving the contradiction between ease of operation and sealing reliability
Solution Approach 2:
The sealing ring incorporates different surface geometries at different locations: a slanting surface with a tip for insertion, an abutment surface for compression, and a curved surface for groove engagement. This local differentiation of properties ensures both easy insertion and reliable sealing without displacement
2Reliability
If a non-circular cross-sectional shape is used for the sealing ring, then displacement is prevented and sealing is stabilized, but the manufacturing complexity increases
Solution Approach 1:
The sealing ring uses a non-circular cross-sectional shape with specific geometric parameters (slanting surface angle, tip geometry, abutment surface configuration) that can be controlled during manufacturing. This parameter optimization achieves stable sealing while maintaining manufacturability through precise dimensional control rather than complex multi-component design
3Reliability
If the sealing ring is compressed during insertion, then a tight seal is achieved, but stiffer materials like silicone require higher compression forces
Solution Approach 1:
The sealing ring incorporates a curved surface that engages with the curved groove, distributing compression forces more evenly. The curved geometry allows gradual compression of stiffer materials like silicone during insertion, reducing peak forces while achieving reliable sealing
Data Source
Figure 1
Figure 2a~3d
Figure 4a~4c
AI summary
A pipe assembly for a drainage system comprises a pipe (10) with a wall (10a) having an inner surface with a circumferential groove (10c). A sealing ring (14) is provided in a plane (P) and being arranged in the circumferential groove (10c), wherein the sealing ring (14) has a cross-sectional shape comprising an essentially planar, slanting surface (14b) facing away from circumferential groove (10c), the slanting surface being at a first angle (α) to the plane (P) of the sealing ring (14). By providing the sealing ring (14) with an abutment surface (14e) adjacent to the slanting surface (14b), the abutment surface (14e) having a surface being at a second angle (β) to the plane (P) that is smaller than the first angle (α), insertion of a connection pipe (20) into the pipe (10) is facilitated. A water trap with a pipe assembly and a sealing ring are also provided.