Composite Lining Hose Structure for Pipe Sealing and Bonding
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Solution Overview
Problem
Existing lining hoses for the rehabilitation of fluid-carrying systems do not meet all requirements satisfactorily, particularly in terms of sealing, bonding, and durability.
Innovation Solution
The development of lining hoses comprising at least one tubular layer made of fiber bands impregnated with a curable unsaturated polyester or vinyl ester resin, and another tubular layer made of fiber bands impregnated with a photochemically curable epoxy resin, along with a thermoplastic layer in contact with the fluid medium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single-layer fiber hose impregnated with curable resin is used, then the structure is simple and production is easy, but the sealing, bonding, and durability performance are insufficient
Solution Approach 1:
The fiber hose is divided into multiple functional layers: an inner film layer for sealing, intermediate fiber bands impregnated with curable resin for bonding and structural integrity, and an outer protective film for durability. This segmentation allows each layer to perform its specific function optimally while maintaining overall system reliability.
Solution Approach 2:
The invention combines different materials (film materials, fiber bands, and curable resins) into a composite structure. The film layers provide sealing and protection, while the resin-impregnated fiber bands provide bonding strength and structural support, creating a multi-material composite that achieves both ease of manufacture and high reliability.
2Object-affected harmful factors
If the outer film hose is tightly sealed to prevent resin leakage, then environmental protection is improved, but bonding between the film hose and resin-impregnated fiber hose becomes difficult
Solution Approach 1:
The hose structure is segmented into distinct functional zones: the outer film provides leakage prevention, while the inner film and resin-impregnated fiber bands create bonding interfaces. This segmentation allows the outer film to maintain tight sealing without compromising the bonding capability of internal layers.
Solution Approach 2:
The inner film layer acts as an intermediary between the outer protective film and the resin-impregnated fiber bands. It allows the outer film to seal effectively while providing a bonding surface for the resin to adhere to, thus mediating between the conflicting requirements of leakage prevention and bonding strength.
3Ease of operation
If traditional single-resin systems are used, then the system is simple to operate, but durability and resistance to fluid media are insufficient
Solution Approach 1:
The invention uses composite material systems combining film materials with resin-impregnated fiber bands. This composite structure enhances durability and resistance to fluid media while maintaining operational simplicity through integrated manufacturing processes.
Solution Approach 2:
The invention changes the material parameters by introducing curable resins that can be activated under specific conditions (heat, UV light, or chemical catalysts). This allows the system to remain simple to operate while achieving enhanced durability through controlled material transformation during installation.
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 configuration enhances the sealing, bonding, and durability of the lining hoses, allowing for improved rehabilitation of fluid-carrying systems while minimizing downtime and disruption.
Implementation Method 1
at least one further tubular layer made of fiber bands impregnated with a photochemically curable epoxy resin
Data Source
AI summary
The invention relates to a liner tube for the rehabilitation of fluid-conducting systems, comprising at least one tubular layer, which is made of fibre bands saturated with a curable acrylate resin, silicate resin, unsaturated polyester resin, or vinyl ester resin, and at least one further tubular layer made of fibre bands saturated with a photochemically curable epoxy resin, the further tubular layer being in indirect or direct contact with the first tubular layer and the liner tube having an inner tubular layer which is based on a thermoplastic and which, in the installed state, is in contact with the fluid medium.