Sheathed Retainer Pipe Joint for Fast Irreversible Spline Locking
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Solution Overview
Problem
Conventional spline-type, restrained pipe joint systems face issues with lost splines during transportation or disassembly, and there is a need for a quicker installation method that does not require reversibility while maintaining robustness.
Innovation Solution
A sheathed spline locking pipe joint system where a tubular member has a spline groove covered by a sheath, and the spline expands into a second spline groove upon assembly, providing a secure and irreversible connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional spline-type restrained pipe joint systems are used, then the pipe joint can be assembled, but the spline can be lost during transportation or disassembly
Solution Approach 1:
The spline is nested within the sheath during transportation, with the sheath acting as a protective container. Upon assembly, the spline is released from the sheath to engage with the pipe joint. This nesting approach prevents spline loss during handling while maintaining a relatively simple overall joint structure.
Solution Approach 2:
The sheath is pre-installed over the spline before assembly, providing preliminary protection and containment. This preliminary action ensures the spline remains secured during transportation and positioning, then allows controlled release during the assembly process to engage the joint.
2Productivity
If a reversible pipe joint system is used, then the joint can be disassembled, but the installation time is increased
Solution Approach 1:
The joint system transitions from a static protected state (spline contained in sheath) to a dynamic engaged state (spline expanded and locked in groove). This dynamic transformation occurs automatically during assembly, providing quick installation without requiring reversible mechanisms for disassembly.
Solution Approach 2:
The spline undergoes a parameter change from a compressed/contained configuration within the sheath to an expanded configuration that engages the groove. This parameter change enables rapid assembly while the irreversible nature of the expansion provides structural integrity without requiring disassembly capability.
Data Source
AI summary
Provided are pipe systems and methods for assembling the same. A pipe system includes two pipes, each having an axis, an exterior surface, a retainer groove formed in the exterior surface, and a sheath mounted to a respective pipe such that the sheath at least partially covers the retainer groove prior to assembly. A retainer is also located in the each retainer groove, disposed radially beneath the sheath relative to the axis, prior to assembly. The system further includes a coupling having a bell configured to receive each of the two pipes. Each bell may have a retainer groove formed in an inner surface thereof and the bell configured to receive at least a portion of a respective retainer after assembly of the pipe system. When assembled, the sheaths are configured to uncover the retainer grooves such that the retainers expand into the retainer grooves of the coupling inner surface.