Segmented Pipe Coupling for Flange-Free Polymer Pipe Sealing
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Solution Overview
Problem
Existing methods for joining non-flanged polymer pipe elements to flanged pipe elements require multiple parts, a fusing operation, and specialized equipment, which is inefficient and weather-dependent, especially under low-pressure conditions.
Innovation Solution
A preassembled coupling comprising segments, fasteners, and a flexible sealing ring that allows for direct axial insertion and secure attachment of non-flanged pipe elements to flanged pipe elements without the need for additional adapters or fusing, using a split ring and sealing ring to create a fluid-tight seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a butt flange adapter and backing ring are used to join non-flanged polymer pipe to flanged pipe, then a fluid-tight seal can be achieved, but the device complexity increases due to multiple parts and assembly steps
Solution Approach 1:
The patent combines the butt flange adapter and backing ring into a single integrated coupling device. The coupling includes a body with a first end for receiving the non-flanged polymer pipe and a second end for engaging the flanged pipe, eliminating the need for separate adapter and backing ring components while maintaining fluid-tight sealing capability.
Solution Approach 2:
The single coupling device performs multiple functions: it provides a fluid-tight seal between the polymer pipe and flanged pipe, mechanically connects the two pipe types, and interfaces with both insertion-type and threaded connections. This multi-functional design replaces the need for multiple specialized components.
2Strength
If a fusing operation is used to join the butt flange adapter to the non-flanged polymer pipe, then a secure connection is achieved, but the loss of time increases due to the fusing process and weather dependence
Solution Approach 1:
The patent replaces the thermal fusing process with a mechanical insertion and engagement system. The non-flanged polymer pipe is inserted into the coupling body and secured through mechanical means at the second end, eliminating the need for heat-based fusing operations and associated weather constraints.
Solution Approach 2:
The coupling body is pre-configured with receiving features and engagement mechanisms that allow for quick assembly. The pipe insertion and securing steps can be performed rapidly without requiring preliminary heating or fusing operations, significantly reducing installation time.
3Strength
If a fusing machine with power source is used to perform the fusing operation, then the butt flange adapter can be joined to the polymer pipe, but the device complexity increases due to specialized equipment requirements
Solution Approach 1:
The patent eliminates the need for thermal fusing machinery by implementing a purely mechanical connection system. The coupling device uses insertion receptacles and engagement mechanisms that require no external power sources or specialized equipment, simplifying the installation process to basic manual operations.
4Ease of operation
If the soft polymer flange deforms to form a seal under low pressure, then a fluid-tight connection is achieved, but the reliability decreases under higher pressure applications
Solution Approach 1:
The patent employs different sealing mechanisms for different pressure conditions. The coupling body includes both a deformable polymer flange section for low-pressure sealing and a rigid metal flange with face seal capability for high-pressure applications, allowing the system to adapt to varying pressure requirements.
Solution Approach 2:
The coupling device utilizes composite construction combining soft polymer materials for sealing surfaces with rigid metal structures for structural support and high-pressure containment. This composite approach allows the single device to reliably seal across a wide range of pressure conditions.
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 reduces the number of parts needed, eliminates the requirement for a fusing machine, and enhances installation efficiency by providing a reliable fluid-tight seal across varying pressure conditions, independent of weather constraints.
Implementation Method 1
A flexible, resilient sealing ring is positioned in the channel. The sealing ring comprises first and second lobes that each extend radially inwardly to define first and second ring inner seal surfaces
Implementation Method 2
a plurality of segments attached to one another end to end by fasteners to form a loop around a central space
Implementation Method 3
the fasteners can be tightened so as to draw the plurality of segments toward one another and the central space and thereby cause (1) the first ring inner seal surface to sealingly engage the sealing surface of the tube, and (2) the second ring inner seal surface to sealingly engage a sealing surface of the first pipe element
Data Source
AI summary
A combination includes a plurality of segments attached to one another end to end around a central space. A channel is disposed between the sides of the segments. A sealing ring is positioned in the channels. A tube has a first end disposed within the central space. A first protrusion extends radially outwardly from the tube and limits the extent to which the tube can extend into the central space. The combination is configured such that an end of a pipe element may be axially inserted into the central space and fasteners can be tightened to draw the segments toward one another.