Elastic-Weft Lining Hose for Variable-Diameter Pipe Rehabilitation
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Solution Overview
Problem
Existing lining hoses for fluid-carrying systems face challenges with gas tightness and adhesion issues, requiring complex pre-processing and being limited in use for varying diameters, leading to high costs and potential detachment due to gas pressure buildup.
Innovation Solution
A lining hose with weft threads having greater elasticity than warp threads, allowing for increased radial flexibility and diameter adaptation, along with resistance to fluids and temperatures, enabling a durable and versatile solution for rehabilitation and reinforcement of fluid lines with varying diameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the lining hose is made with standard fabric structure, then the installation process is simple, but the hose cannot adapt to varying diameters and may become detached due to gas pressure buildup
Solution Approach 1:
The fabric is designed with different thread properties in different directions: weft threads (circumferential direction) have greater elasticity to adapt to diameter variations, while warp threads (longitudinal direction) have high tensile strength to prevent detachment. This local differentiation of material properties enables both diameter adaptation and reliable adhesion simultaneously.
Solution Approach 2:
The fabric combines threads with different mechanical properties - elastic weft threads and strong warp threads - to create a composite structure that exhibits both diameter adaptability and high adhesion strength, resolving the contradiction between these two requirements.
2Reliability
If complex pre-processing is performed on the metal surface, then adhesion is improved, but the cost and installation effort increase significantly
Solution Approach 1:
The lining hose's fabric structure itself provides the adhesion mechanism through its elastic-constraining action on the pipe surface, eliminating the need for separate surface preparation steps like sandblasting or chemical treatments. The hose adapts to and secures itself on the pipe surface through its inherent mechanical properties.
Solution Approach 2:
The patent replaces chemical/mechanical surface preparation processes with a mechanical adhesion system based on the fabric's elastic-constraining action, where the weft threads' elasticity enables the hose to conform to and adhere to the pipe surface without complex pre-processing.
3Adaptability or versatility
If the weft threads have high elasticity for diameter adaptation, then the hose can accommodate varying diameters, but the longitudinal strength may be reduced
Solution Approach 1:
The fabric structure assigns different functional properties to different thread directions: weft threads provide radial elasticity for diameter adaptation, while warp threads provide longitudinal strength to prevent detachment. This directional differentiation resolves the contradiction between radial flexibility and longitudinal 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
The solution provides a lining hose that can adapt to significant diameter fluctuations, ensuring a tight fit and durability, while being resistant to various fluids and temperatures, thus reducing installation effort and extending the hose's applicability in diverse fluid-carrying systems.
Implementation Method 1
the weft threads have greater elasticity than the warp threads
Implementation Method 2
the resin-soaked outer layer sticks to the inside of the fluid line
Data Source
Figure 1~3
Figure 4~5
AI summary
The invention relates to a lining hose (2) constructed from at least three hose layers (4, 6, 8), in particular for the rehabilitation of fluid-carrying systems, comprising a) at least one inner hose layer (4), b) at least one middle hose layer (6) comprising a seamless fabric (16) formed from warp threads (12) and weft threads (10), wherein the warp threads (12) run longitudinally and the weft threads (10) circumferentially of the lining hose (2), and c) at least one outer hose layer (8), wherein the weft threads (10) have greater elasticity than the warp threads (12). The invention also relates to a pressure pipe section (18) with this lining hose (2) and to methods for rehabilitating an existing, old fluid pipeline and for supplementing a pressure pipeline using this lining hose (2).