Textile Hose Pipe Lining for Smooth Wastewater Pipe Repair
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Solution Overview
Problem
Existing methods for mending damaged wastewater pipes are costly, time-consuming, and often result in new blockages and leaks due to the inability of current liners to absorb radial or axial forces, leading them to copy the damaged contour of the pipe.
Innovation Solution
The proposed solution involves an arrangement comprising a first textile hose woven in a single piece, a felt hose wetted with a curable synthetic resin mixture inside the first hose, and a second textile hose coated with silicone for calibration, allowing for easier installation and a smoother inner surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional liners (felt hose, film tube) are used for pipe mending, then installation is relatively simple, but the liner copies the damaged contour of the pipe inner wall, creating new blockages and leaks
Solution Approach 1:
The system is divided into three functional segments: preliner (film tube) for forming permanent mold, main liner (felt hose) for resin carrier function, and calibration hose for radial expansion. Each segment performs a specific function, allowing the system to achieve both simple installation and reliable contour correction without requiring complex integrated components.
Solution Approach 2:
The calibration hose enables dynamic change of radial pressure parameters during installation. By controlling the inflation pressure of the calibration hose, the system can apply sufficient radial force to force the main liner away from damaged pipe contours, creating a smooth inner surface that prevents blockages and leaks.
2Strength
If hybrid liner with glass-fibre reinforcement is used, then resistance and bending tensile strength are higher, but the inversion method cannot be used and installation becomes more complex and costly
Solution Approach 1:
The reinforcement function is separated from the installation flexibility function. The felt hose provides sufficient structural strength when saturated with resin, while the film tube and calibration hose handle the complex installation tasks. This segmentation allows use of simpler materials that maintain flexibility during inversion installation.
Solution Approach 2:
The system enables inversion installation by using the film tube as a permanent mold that the felt hose can be inverted into. The calibration hose then expands the assembly radially to achieve proper fit. This inversion capability simplifies installation in pipelines with multiple bends compared to rigid hybrid liners.
3Ease of operation
If felt hose is used as main liner, then it can be installed by inversion method, but it cannot absorb radial or axial forces
Solution Approach 1:
Force absorption functions are distributed to appropriate components: the film tube absorbs radial forces during installation and maintains structural shape, while the calibration hose provides controlled radial expansion force. The felt hose focuses on its primary function of resin saturation and adhesion to the pipe inner wall, enabling inversion installation without requiring high structural strength.
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 method enables the production of stable, durable liners that can be installed in pipes with multiple bends, reducing the risk of new blockages and leaks, and providing a more cost-effective and efficient mending process.
Implementation Method 1
a felt hose arranged in the interior of the first textile hose and wetted with a curable synthetic resin mixture
Implementation Method 2
a second textile hose, woven in a single piece and coated on its outer wall with a release agent, preferably silicone, not adhering to the synthetic resin mixture
Data Source
AI summary
An arrangement for mending a pipe, particularly a waste water pipe, which arrangement comprises the following elements: a first textile hose (ALg) woven in a single piece preferably laminated on the outer wall thereof, a felt hose (FS) arranged in the interior of the first textile hose (ALg) and wetted with a curable synthetic resin mixture, and a second textile hose (ALs), woven in a single piece and coated on its outer wall with a release agent, preferably silicon, not adhering to the synthetic resin mixture, for introduction into the felt hose (FS). A method for mending a pipe, particularly a waste water pipe, preferably uses the arrangement described.