Conductive Pipe Joint Seal With Ridge-Groove Installation Lock
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Solution Overview
Problem
Existing pipe joints face challenges in preventing the incorrect installation of non-conductive O-ring seals, which can lead to insufficient compression and compromised sealing performance, especially in systems requiring electrical conductivity.
Innovation Solution
A pipe joint design featuring a recess with a ridge and a groove that fits around the seal's radial periphery, ensuring that only an electrically conductive seal can be properly installed, with complementary partially-toroidal shapes and a wide groove for easy fitting, providing a conductive path with low electrical resistance and enhanced sealing capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a standard non-conductive O-ring seal is used, then the seal can be easily installed, but it cannot provide electrical conductivity and may be incorrectly installed leading to insufficient compression
Solution Approach 1:
The seal is given an asymmetric cross-sectional profile with a groove on one side and a ridge on the other, making it incompatible with symmetric O-ring grooves. This asymmetric design ensures the seal can only be installed in the correct orientation and position, preventing incorrect installation while maintaining ease of installation for the correct seal type.
Solution Approach 2:
The groove and ridge features act as intermediary elements that mediate between the seal and the groove housing. These features ensure proper positioning and orientation of the seal, providing a mechanical interface that guarantees correct installation and sufficient compression for reliable sealing and electrical conductivity.
2Reliability
If a groove and ridge design is implemented, then correct seal installation is ensured, but the design complexity increases
Solution Approach 1:
The seal structure is segmented into distinct functional zones: a groove region, a ridge region, and a sealing region. This segmentation allows each feature to perform its specific function independently while maintaining overall simplicity. The groove and ridge are integrated into the seal body as continuous features rather than separate components, reducing assembly complexity.
Solution Approach 2:
The groove and ridge features are merged into a single integrated seal component rather than being separate parts. This combining of features into one piece reduces the number of components, simplifies manufacturing, and eliminates the need for additional assembly steps while still providing the necessary installation guidance and positioning.
3Ease of manufacture
If the groove and ridge have sharp corners and straight walls, then manufacturing is simpler, but stress concentration increases reducing seal reliability
Solution Approach 1:
The groove and ridge features incorporate curved transitions with rounded corners and arc-shaped profiles instead of sharp corners and straight walls. This curvature distributes stress more evenly across the seal structure, eliminating stress concentration points while maintaining manufacturability through standard molding or machining processes that can easily produce curved 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 design effectively prevents the installation of non-conductive O-ring seals, ensures a conductive path with low electrical resistance, and provides a liquid-tight seal with improved resistance to twisting and axial forces, reducing the risk of mal-installation and enhancing sealing performance.
Implementation Method 1
the seal is resiliently flexible so that it provides a liquid-tight seal between the first and second pipes
Implementation Method 2
the seal is electrically conductive so that it permits electrical currents to flow between the first and second pipes via the seal member
Data Source
AI summary
A pipe joint with a socket, and a pipe fitted into the socket. An annular seal is compressed between the socket and the pipe. The seal is electrically conductive and resiliently flexible. The socket or the pipe has a recess which houses the seal. The recess has a ridge in a base of the recess and the seal has a groove which extends around a radial periphery of the seal. The ridge fits into the groove to fool proof the installation, such that a standard non-conductive O-ring seal is more difficult to install in error.