Continuous Tubular Assembly With Resin-Impregnated Wrapped Casing
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Solution Overview
Problem
The construction of long, continuous tubular structures like pipelines is hindered by existing methods, which often result in pipes being composed of short sections joined together, creating structural weaknesses and limitations in length and diameter, particularly for transporting liquids and gases over long distances.
Innovation Solution
A method involving a prefabricated tubular assembly with an inner and outer portion, where the outer casing is wrapped around the inner tube and impregnated with a resinous binder as it is wrapped, allowing for controlled radial expansion and full impregnation of the reinforcement layers, enhancing the structural integrity and length of the pipeline.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If pipes are constructed by joining short sections together, then the pipe length can be extended, but structural weaknesses and reliability deteriorate due to multiple joints
Solution Approach 1:
The pipe construction is divided into an inner tube portion and an outer tube portion that are constructed separately and then joined together. The inner tube is constructed first, followed by the outer tube that surrounds and integrates with it, creating a multi-segment structure that achieves both extended length and maintained structural integrity through controlled segmentation rather than multiple field joints
Solution Approach 2:
The outer tube is constructed to surround and nest with the inner tube, with the outer tube's reinforcement layers wrapping around the inner tube structure. This nested configuration allows the two portions to be integrated into a single continuous pipe structure, eliminating the need for external joints while maintaining structural strength
2Reliability
If a single continuous pipe is constructed, then structural integrity is improved, but manufacturing complexity and device complexity increase
Solution Approach 1:
The inner tube is constructed completely first as a preliminary structure, including its liner and reinforcement layers. Then the outer tube is constructed around this pre-formed inner tube structure. This preliminary construction approach allows each portion to be built and cured independently before integration, simplifying the overall manufacturing process while achieving the structural integrity of a single continuous pipe
Solution Approach 2:
The inner tube serves as an intermediary structure that facilitates the construction of the outer tube. The outer tube's reinforcement layers are wrapped around the inner tube, using it as a form and structural core during construction. This intermediary role of the inner tube simplifies the manufacturing process by providing a stable base for outer tube construction, while the final integrated structure achieves the desired structural integrity
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 approach enables the construction of longer, structurally integrated pipelines with improved hoop and axial stress bearing properties, reducing the need for multiple pipe sections and minimizing structural weaknesses, thus facilitating the creation of continuous pipelines for extensive transportation networks.
Implementation Method 1
introducing resinous binder into the reinforcement as the strip is being wrapped
Implementation Method 2
full impregnation of the reinforcement layers
Implementation Method 3
allowing for controlled radial expansion
Data Source
AI summary
A method and apparatus for constructing a tubular assembly 40 comprising an inner portion (24) and a further portion (23) surrounding the inner portion. The inner portion (24) comprises reinforcement (37) and the further portion (23) being formed from a strip (50) of material comprising two opposed longitudinal marginal side portions (53). The apparatus comprises an assembly station (220) comprising a wall (253). The apparatus comprises means for advancing the inner portion (21) along a first path (231) extending passed the wall (253), and means for advancing the strip (50) along a second path (232) and causing the strip to encircle the wall (253) and thereby wrap about and surround the inner portion (21). The apparatus further comprises means (321) for introducing resinous binder into the reinforcement (37) as the strip (50) is being wrapped about the inner portion (21).