Plastic Exhaust Socket Pipe with Plug-In Ring for Tight Sealing
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Solution Overview
Problem
Existing plastic exhaust sleeve pipes for building heating systems face challenges in manufacturing complexity and high costs due to difficult demouldability in injection molding, and they often suffer from poor sealing efficiency and centricity issues, leading to compromised tightness and assembly difficulties.
Innovation Solution
A multi-part plastic exhaust sleeve pipe design featuring a plug-in ring with a circumferentially closed state secured by latching means, which supports the lip seal radially outside the groove base, preventing flexing and enhancing centricity, and includes a labyrinth seal for improved tightness, with lugs and additional sealing lips to secure the connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the inner peripheral groove is formed entirely by a one-piece tubular body, then the structure is simple, but the manufacturing complexity and cost increase due to difficult demouldability in injection molding
Solution Approach 1:
The exhaust sleeve pipe is divided into two separate components: a tubular body and a plug-in ring. The plug-in ring is inserted into the tubular body to form the complete socket section, allowing each part to be manufactured separately with easier demouldability while maintaining structural functionality.
Solution Approach 2:
The plug-in ring is nested within the tubular body, where the plug-in ring is inserted into the tubular body to form the socket section. This nested structure allows both components to work together as a unified system while enabling separate manufacturing processes.
2Ease of manufacture
If a plug-in ring is used to simplify manufacturing, then demouldability improves, but assembly work increases and centricity/roundness deteriorates
Solution Approach 1:
The plug-in ring is pre-formed with a slightly enlarged insertion end section that facilitates automatic centering and alignment during insertion. This preliminary preparation of the insertion geometry eliminates the need for complex assembly operations while ensuring proper centricity.
Solution Approach 2:
The insertion end section of the plug-in ring is designed to self-center during insertion into the tubular body. The enlarged geometry automatically guides alignment and ensures proper positioning without requiring external alignment tools or complex assembly procedures.
3Ease of operation
If the plug-in ring is positioned without exact positioning, then assembly is easier, but the sealing effect deteriorates
Solution Approach 1:
The plug-in ring is pre-formed with a slightly enlarged insertion end section that facilitates automatic centering and alignment during insertion. This preliminary preparation of the insertion geometry eliminates the need for complex assembly operations while ensuring proper centricity.
Solution Approach 2:
The insertion end section of the plug-in ring is designed to self-center during insertion into the tubular body. The enlarged geometry automatically guides alignment and ensures proper positioning without requiring external alignment tools or complex assembly procedures.
4Quantity of substance
If the wall thickness in the groove base area is reduced, then material usage decreases, but the structural strength and sealing support deteriorate
Solution Approach 1:
The exhaust sleeve pipe is divided into two separate components: a tubular body and a plug-in ring. The plug-in ring is inserted into the tubular body to form the complete socket section, allowing each part to be manufactured separately with easier demouldability while maintaining structural functionality.
Solution Approach 2:
The socket section is formed as a composite structure combining the tubular body and the plug-in ring. This composite design provides enhanced structural strength and sealing support at the groove base area while optimizing material distribution and reducing overall material usage.
Data Source
Figure 1~2
Figure 3~4
Figure 5~7
AI summary
The invention relates to a plastic exhaust gas socket pipe for the exhaust gas routing of building heating systems, comprising a pipe body (2) and an end socket section (4) for receiving a pipe section of a further exhaust gas pipe to produce an exhaust gas socket pipe connection, wherein in the socket section (4) a ring seal designed as a lip seal (6) for sealing contact on the outer circumference of the pipe section which can be inserted into the socket section (4) in an insertion direction (E) is received in a groove base formed by a groove base section of the pipe body (20) and a first and a second groove wall (21, 25) extending at an angle thereto, an inner circumferential groove (5) open radially inwards.