Pipeline Lining Element With Multi-Layer Barrier Coating
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Solution Overview
Problem
Existing pipeline lining elements face challenges in being flexible enough to adapt to curves and bends while maintaining sufficient thickness and tightness, often requiring a calibrating tube for inversion and hardening, which can be cumbersome and less effective.
Innovation Solution
A lining element with a substrate layer of resin-absorbing material and a multi-layer fluid-tight barrier coating system that is flexible and expansible, allowing for vapor and water pressure resistance without a calibrating tube, and featuring an anti-friction layer for easier inversion and protection against resin washout.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lining element is made thicker to maintain sufficient thickness in curves and bends, then the tightness and structural integrity are improved, but the reduction of pipe cross section increases and installation flexibility deteriorates
Solution Approach 1:
The coating system is divided into multiple functional layers (fluid-tight barrier layer, anti-friction layer, adhesive layer) that work together to provide both tightness and flexibility. Each layer contributes specific properties that collectively resolve the contradiction between thickness and adaptability.
Solution Approach 2:
The lining element uses composite material construction with a resin-absorbing substrate layer combined with a multi-layer coating system. This composite structure provides both the structural integrity needed for tightness and the flexibility required for installation in curves and bends.
2Ease of manufacture
If a calibrating tube is used for inversion and hardening, then the installation process is standardized, but the device complexity increases and the process becomes more cumbersome
Solution Approach 1:
The invention extracts and eliminates the calibrating tube from the installation process. The coating system's inherent fluid-tight barrier layer allows the lining element to maintain its shape and provide sufficient pressure resistance without requiring an external calibrating tube, thereby simplifying the overall system.
Solution Approach 2:
The coating system provides self-service functionality by maintaining the necessary pressure resistance and shape stability through its own multi-layer structure. The fluid-tight barrier layer enables the lining element to function as its own calibrating structure, eliminating the need for separate calibration equipment.
3Adaptability or versatility
If the lining element is made more flexible to adapt to curves and bends, then the adaptability is improved, but the formation of creases increases which compromises tightness
Solution Approach 1:
The invention uses flexible thin film structures in the coating system that can adapt to curves and bends without forming damaging creases. The multi-layer construction provides flexibility while maintaining fluid-tightness, allowing the lining element to conform to pipeline geometry without compromising 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
The solution enables the lining element to adapt to pipeline curves and bends without crease formation, maintains sufficient thickness and tightness, and eliminates the need for a calibrating tube by providing high vapor and water pressure resistance, ensuring effective rehabilitation of pipelines with improved installation ease.
Implementation Method 1
the coating system has a high vapor impermeability. Thus, a calibrating tube can be dispensed with. Furthermore, water can also be used for inversion, pressing and hardening because the coating system of the lining element according to the invention is configured to be fluid-tight. Thus, the lining element also has a high water pressure resistance in addition to its high vapor pressure resistance.
Implementation Method 2
The lining element comprises a substrate layer including a resin-absorbing material, in particular a non-woven or a fiber material. Prior to the insertion of the lining element, the layer including the resin-absorbing material is impregnated with the resin
Implementation Method 3
By inserting the lining elements, leaking and defective sections of pipelines, and in particular of pipeline joint portions, can be rehabilitated. To this end, the lining element is permanently bonded to the inner wall of the pipe to be rehabilitated by providing the lining element with an adhesive, with a hardenable resin, in particular, being used as the adhesive.
Implementation Method 4
After the resin has hardened, the lining element rests against the inner pipe wall in a positive and frictional engagement.
Data Source
AI summary
A lining element for the rehabilitation of a pipeline, the lining element having a substrate layer including a resin-absorbing material and a coating system, the coating system including a fluid-tight barrier layer system formed from several layers.