Stepped Pipe Sealing Groove for Chamfer-Free Joint Assembly
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Solution Overview
Problem
Current sealing technologies for pipe joints in the pipeline industry are cumbersome, time-consuming, and costly due to the need for pre-chamfering and chamfering of pipe ends, which can lead to poor sealing performance and leakage when not done correctly, especially with high-pressure fluids.
Innovation Solution
A sealing structure featuring an inner pipe with sealing grooves and a sealing ring that includes a lip and a main body, where the sealing ring is nested in the grooves and compressed to create a tight seal without requiring pre-chamfering of the pipe ends, utilizing a guide surface to facilitate smooth insertion and prevent the ring from being squeezed out, ensuring effective sealing regardless of fluid flow direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pre-chamfering and rounding of pipe ends are performed to ensure proper sealing ring installation, then sealing performance is improved, but installation complexity and time increase
Solution Approach 1:
The sealing groove is pre-formed with a rounded bottom and chamfered edges during manufacturing, eliminating the need for field preparation of pipe ends. The sealing ring is pre-installed in the prepared groove before pipe assembly, ensuring proper positioning without requiring complex field operations.
Solution Approach 2:
The sealing groove geometry automatically guides and positions the sealing ring during installation. The rounded bottom and chamfered edges of the groove self-align the sealing ring, eliminating the need for manual chamfering or rounding operations on pipe ends by installation workers.
2Reliability
If pre-chamfering and rounding of pipe ends are performed to ensure proper sealing ring installation, then sealing performance is improved, but installation time increases
Solution Approach 1:
The sealing groove is pre-formed with a rounded bottom and chamfered edges during manufacturing, eliminating the need for field preparation of pipe ends. The sealing ring is pre-installed in the prepared groove before pipe assembly, ensuring proper positioning without requiring complex field operations.
Solution Approach 2:
The sealing groove geometry automatically guides and positions the sealing ring during installation. The rounded bottom and chamfered edges of the groove self-align the sealing ring, eliminating the need for manual chamfering or rounding operations on pipe ends by installation workers.
3Reliability
If pre-chamfering and rounding of pipe ends are performed to ensure proper sealing ring installation, then sealing performance is improved, but installation cost increases
Solution Approach 1:
The sealing groove is pre-formed with a rounded bottom and chamfered edges during manufacturing, eliminating the need for field preparation of pipe ends. The sealing ring is pre-installed in the prepared groove before pipe assembly, ensuring proper positioning without requiring complex field operations.
Solution Approach 2:
The sealing groove geometry automatically guides and positions the sealing ring during installation. The rounded bottom and chamfered edges of the groove self-align the sealing ring, eliminating the need for manual chamfering or rounding operations on pipe ends by installation workers.
4Device complexity
If pipe ends are not properly chamfered and rounded, then installation process is simplified, but sealing performance deteriorates and leakage occurs
Solution Approach 1:
The sealing groove is pre-formed with a rounded bottom and chamfered edges during manufacturing, eliminating the need for field preparation of pipe ends. The sealing ring is pre-installed in the prepared groove before pipe assembly, ensuring proper positioning without requiring complex field operations.
Solution Approach 2:
The sealing groove geometry automatically guides and positions the sealing ring during installation. The rounded bottom and chamfered edges of the groove self-align the sealing ring, eliminating the need for manual chamfering or rounding operations on pipe ends by installation workers.
5Reliability
If the sealing ring is compressed during pipe insertion, then sealing performance is improved, but the sealing ring may be squeezed out of the sealing groove, damaging the seal
Solution Approach 1:
The sealing groove is pre-formed with a rounded bottom and chamfered edges during manufacturing, eliminating the need for field preparation of pipe ends. The sealing ring is pre-installed in the prepared groove before pipe assembly, ensuring proper positioning without requiring complex field operations.
Solution Approach 2:
The rounded bottom and chamfered edges of the sealing groove act as protective features that cushion and guide the sealing ring during compression. These pre-formed geometric features prevent the sealing ring from being squeezed out of the groove by distributing compression forces evenly and maintaining proper ring positioning during the sealing process.
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
This solution simplifies the installation process, reduces costs, and ensures a reliable, leak-proof seal for high-pressure fluids by allowing smooth pipe insertion and maintaining sealing performance without pre-chamfering, thus preventing damage to the sealing ring and ensuring effective sealing in both directions of fluid flow.
Implementation Method 1
the inner pipe can be sealingly connected, through a compressive deformation of the sealing ring, to the pipe inserted outside the inner pipe
Implementation Method 2
a peripheral wall of the sealing ring is provided with a guide surface for guiding insertion of the pipe
Data Source
Figure 1~3
Figure 4~6
Figure 7~9
AI summary
The present disclosure relates to the field of sealing technologies, and provides a sealing structure. The sealing structure includes an inner pipe, an outer pipe, and a sealing ring, where the outer pipe is detachably sleeved on the inner pipe, a slot for inserting a pipe is formed between an inner wall of the outer pipe and an outer wall of the inner pipe, and the outer wall of the inner pipe is provided with a sealing groove for placing the sealing ring; the sealing ring includes a main body provided with a lip; the sealing groove includes a first sealing groove and a second sealing groove, the first sealing groove and the second sealing groove are stepped, and a depth of the first sealing groove is less than that of the second sealing groove; the bottom of the lip fits the bottom of the first sealing groove, a thickness of the lip in a non-compressed state is greater than the depth of the first sealing groove, and a width of the lip in the non-compressed state is less than that of the first sealing groove; and the bottom of the main body fits the bottom of the second sealing groove, and a thickness of the main body in the non-compressed state is less than or equal to the depth of the second sealing groove.