Bonded Mechanical Restraint for Pipe Joint Integrity
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Solution Overview
Problem
Current piping systems face challenges in maintaining durable connections under high hydraulic pressures and external forces, leading to potential leaks and structural damage, particularly due to the use of traditional mechanical joint fittings that apply localized stresses and require complex installation processes.
Innovation Solution
The use of mechanical restraint members bonded to the exterior surfaces of piping components to inhibit axial movement, distributing stress over a larger area and eliminating the need for penetrating fasteners, thereby enhancing the structural integrity and simplifying the installation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional mechanical joint fittings with flanges and bolts are used to connect piping components, then the connection can resist hydraulic pressure and external forces, but the installation process becomes complex and time-consuming requiring multiple steps including inserting pipe into bell, positioning gasket, inserting T-bolts, and tightening bolts in a star pattern
Solution Approach 1:
The patent extracts and eliminates the flange and bolt components from the traditional mechanical joint fitting, replacing them with a simplified push-on coupling mechanism that achieves the same connection function through direct insertion and friction-based restraint, thereby removing the complex multi-step assembly process while maintaining connection reliability
Solution Approach 2:
The patent replaces the mechanical fastening system (flanges and bolts requiring manual tightening) with a friction-based mechanical restraint system where the pipe is held in place by friction between the pipe surface and the coupling interior, eliminating the need for bolt tightening operations
2Reliability
If flange-based mechanical joint fittings are used to secure piping components, then the joint can resist forces from internal hydraulic pressure and flowing liquid, but external access to bolts becomes difficult when pipes are buried in trenches
Solution Approach 1:
The patent removes the flange and bolt components that require external access for installation and maintenance, replacing them with a push-on coupling mechanism that can be installed and inspected from above the trench, eliminating the need to reach into confined spaces to tighten or loosen fasteners
Solution Approach 2:
Instead of requiring access to the bottom of buried pipes to tighten bolts on flanges, the patent inverts the installation approach by designing a coupling that is installed from the top side, allowing all operations to be performed from above ground level where access is unrestricted
3Reliability
If push-on joint fittings with tapered pipe ends and gaskets are used to connect pipes, then the joint can provide friction-based holding, but considerable insertion force is required and the assembly process becomes complicated and time-consuming
Solution Approach 1:
The patent eliminates the tapered pipe end and complex gasket positioning steps, using instead a straight pipe end that simply pushes into the coupling where friction is generated automatically through the interaction of the pipe outer surface and the coupling interior, reducing the number of operational steps while maintaining friction-based holding
Solution Approach 2:
The coupling is pre-configured with internal friction surfaces and restraint mechanisms that automatically engage with the pipe upon insertion, eliminating the need for manual gasket positioning and bolt tightening steps that slow down the installation 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 provides a more robust and leak-resistant connection by distributing stress evenly, reducing the risk of structural damage during installation and maintaining a fluid-tight seal under hydraulic pressures, while simplifying the installation process by eliminating the need for complex bolt tightening and minimizing access issues in buried systems.
Implementation Method 1
mechanical restraint members bonded to the exterior surfaces of piping components
Data Source
AI summary
A method for joining a first conduit section having a longitudinally extending open first end and an inner surface with a second conduit section having a longitudinally extending end and an outer surface is provided. The method comprises:a) inserting a first end of the second conduit section in the open first end of the first conduit section and forming a fluid tight seal between the first and second conduit sections; and,b) bonding at least a portion of the inner surface of the first conduit section to at least a portion of the outer surface of the second conduit section.