Compression Coupling Segmented Restraining Joint
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Solution Overview
Problem
Compression couplings used for connecting metallic and non-metallic pipes often lack sufficient resistance to pull-out, particularly at the end connected to the metallic pipe, which can lead to leaks and structural issues.
Innovation Solution
A compression coupling design that incorporates a separate restraining joint in addition to the sealing joint, utilizing a compression ring with radial grooves and a tapered end to securely attach the metallic pipe, enhancing the resistance to pull-out and providing a secure connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a compression coupling uses a single joint for both sealing and restraining metallic pipe, then the device complexity is reduced, but the resistance to pull-out is insufficient
Solution Approach 1:
The coupling structure is segmented into two distinct joints: a sealing joint with a seal ring for preventing leakage, and a restraining joint with a compression ring for providing mechanical restraint and pull-out resistance. This segmentation allows each joint to be optimized for its specific function, resolving the contradiction between structural simplicity and pull-out strength.
2Strength
If a compression coupling uses a separate restraining joint for metallic pipe, then the resistance to pull-out is improved, but the device complexity increases
Solution Approach 1:
The restraining joint and sealing joint are merged into a single integrated coupling body, sharing common components such as the adapter coupling and housing. This merging approach provides the benefits of enhanced pull-out resistance through the separate restraining joint while minimizing the increase in overall device complexity through component sharing and integration.
3Reliability
If a compression coupling uses a compression ring with radial grooves and tapered end, then the restraining joint effectiveness is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The compression ring incorporates specific geometric parameters including radial grooves for enhanced grip and a tapered end for progressive compression. These parameter changes improve the restraining joint effectiveness by increasing friction and mechanical interlocking, while the gradual taper allows for more tolerant manufacturing specifications compared to sharp geometric features.
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 significantly improves the resistance to pull-out of the metallic pipe, ensuring a reliable and leak-proof connection by creating a distinct restraining joint that complements the sealing joint, thus enhancing the structural integrity and durability of the pipe coupling.
Implementation Method 1
a compression ring with radial grooves and a tapered end to securely attach the metallic pipe, enhancing the resistance to pull-out
Implementation Method 2
radial grooves
Implementation Method 3
compression coupling includes a sealing joint for sealingly coupling a pipe to the compression coupling
Data Source
AI summary
A compression coupling includes a sealing joint for sealingly coupling a pipe to the compression coupling and a restraining joint separate from the sealing joint for restraining the pipe to the compression coupling.