Aeration method for repairing polyurethane composite inner liner hose

Abstract

The utility model discloses a polyurethane composite inner lining hose for air turning method repair, including the polyurethane film layer of outer layer and the double layer flannelette layer of inner layer, the double layer flannelette layer is made of the single side flannelette of two layer acrylic and polyester mixed preparation intercoupling and is made, the polyurethane film layer is compounded in the surface of double layer flannelette layer, the joint of polyurethane film layer is fixed and sealed through the hot melt of polyurethane joint batten and is pasted, the joint of double layer flannelette layer is stitched splice through high -strength line, utilize the flexibility of polyurethane, excellent scratch -resistant, corrosion -resistant and high -strength performance, can make it before unhardening flexible structure's hose, with the repaired pipeline inner wall full connection, has the advantage of corrosion -resistant and wear -resistant, material strength is big, and the area loss of break is little, and the surface is smooth, and the water flow friction drops, has improved the flow capacity of pipeline, most can change 2 diameters, and the pressure -resistant is as high as 0.8bar, and the high temperature -resistant is as high as 70 degrees, and the pressure -resistant is as high as 0.5bar, is applicable to the reducing pipe.

Description

Technical Field

[0001] This utility model relates to a flexible hose for trenchless pipeline repair, and more particularly to a polyurethane composite lined flexible hose for air-turning repair. Background Technology

[0002] Trenchless repair refers to the renewal and repair of underground pipelines with minimal surface excavation. Originating in the UK, it has seen large-scale development in Germany. This technology does not obstruct traffic, damage green spaces or vegetation, or disrupt the normal lives and work of shops, hospitals, schools, and residents. It solves the problems of traditional excavation construction, which disrupts residents' lives and causes damage and adverse effects on traffic, the environment, and the foundations of surrounding buildings. The main process involves: fabricating a fiber-lined pipe with a polymer coating on the outside, impregnating it with resin material to create the liner pipe to be overturned; then, it is inserted into the pipeline to be repaired via gravity water, air pressure, or traction. Once the entire liner pipe is installed in the main pipeline, the resin material is cured using methods such as room temperature curing, heat curing, or ultraviolet light curing. After the resin material cures, the resin-impregnated liner pipe hardens, forming a new liner pipe within the original pipeline.

[0003] Traditional polyurethane hoses used for pipe lining repair have poor flexibility, abrasion resistance, and scratch resistance. They are unsuitable for use with pipes containing too many impurities, or for pipes that are round, oval, square, or irregularly shaped. They may also be prone to scratching.

[0004] Therefore, there is a particular need for a polyurethane composite lined hose for air-puff repair to solve the aforementioned existing problems. Utility Model Content

[0005] The purpose of this invention is to provide a polyurethane composite lined hose for air-over repair, which effectively solves the technical problem of poor adaptability of traditional polyurethane hoses for pipeline lining repair, addressing the shortcomings of existing technologies. It is suitable for air-over room temperature and thermosetting repair processes and can efficiently repair pipeline damage.

[0006] The technical problem solved by this utility model can be achieved by the following technical solution: A polyurethane composite inner lining hose for air-to-air repair includes an outer polyurethane film layer and an inner double-layer fleece layer. The double-layer fleece layer is made of two layers of single-sided fleece fabric made of acrylic and polyester blended together. The polyurethane film layer is laminated on the surface of the double-layer fleece layer. The seams of the polyurethane film layer are fixed and sealed by heat fusion through polyurethane seam strips. The seams of the double-layer fleece layer are spliced ​​by high-strength thread stitching.

[0007] In a preferred embodiment of the present invention, the polyurethane film layer is made by extruding polyurethane granules through an extruder, casting them into a film, and then laminating them onto the surface of the double-layer fleece layer.

[0008] In a preferred embodiment of this utility model, two layers of single-sided fleece fabric made of acrylic and polyester are stacked with their napped sides facing each other and punched together by a high-speed needle punching machine to form the double-layer fleece fabric.

[0009] In a preferred embodiment of the present invention, the single-sided fleece fabric made of acrylic and polyester has an acrylic mass percentage of 85-90% and a polyester mass percentage of 10-15%.

[0010] In a preferred embodiment of this utility model, the polyurethane hose is cylindrical in shape.

[0011] In a preferred embodiment of this utility model, the polyurethane joint strip is made of polyurethane, and the polyurethane joint strip is bonded to the joint of the polyurethane hose by heat fusion.

[0012] This utility model discloses a polyurethane composite lined hose for air-turning repair. Compared with existing technologies, it utilizes the flexibility, excellent scratch resistance, corrosion resistance, and high strength of polyurethane. Before curing, it is a flexible hose that can fully connect with the inner wall of the pipe being repaired. It can repair bends with an angle ≤45° and pipes of different shapes: round, elliptical, square, or irregular pipes, as well as pipelines transporting media and domestic drainage. It has the advantages of corrosion resistance and wear resistance, high material strength, small cross-sectional area loss, smooth surface, reduced water flow friction, and improved pipeline flow capacity. The materials are all environmentally friendly and made of highly flexible base material. It can be changed to up to two diameters, with a pressure resistance of up to 0.8 bar and a high temperature resistance of up to 70 degrees Celsius. It is suitable for pipes with variable diameters, thus achieving the purpose of this utility model.

[0013] The features of this utility model can be clearly understood by referring to the drawings and the following detailed description of the preferred embodiments. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of the cross-section of the polyurethane composite liner hose used for air-over repair according to this utility model. Figure 2 This is a cross-sectional schematic diagram of the polyurethane composite lining hose used for air-over repair of this utility model before construction. Figure 3 This is a schematic diagram of the cross-section of the polyurethane composite lining hose used for air-to-repair method of this utility model after construction.

[0015] In the diagram: 1. Polyurethane membrane; 2. First single-sided fleece; 3. Second single-sided fleece; 4. Polyurethane joint strip; 5. Old pipe to be repaired. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below with reference to specific illustrations. Example

[0017] like Figures 1 to 3 As shown, the polyurethane composite inner lining hose for air-turnover repair of this utility model includes an outer polyurethane film layer 1 and an inner double-layer fleece layer. The double-layer fleece layer is made of a first single-sided fleece 2 and a second single-sided fleece 3 made of two layers of acrylic and polyester mixed together. The polyurethane film layer 1 is composited on the surface of the double-layer fleece layer. The seam of the polyurethane film layer 1 is fixed and sealed by heat fusion through a polyurethane seam strip 4. The seam of the double-layer fleece layer is spliced ​​by high-strength thread sewing.

[0018] In this invention, the polyurethane film layer 1 is made by extruding polyurethane granules through an extruder, casting them into a film, and then laminating them onto the surface of the double-layer fleece layer.

[0019] In this invention, the napped side of the first single-sided fleece 2 and the napped side of the second single-sided fleece 3 are stacked opposite each other and punched together by a high-speed needle punching machine to form a double-layer fleece.

[0020] In this invention, the mass percentage of acrylic fiber in the first single-sided fleece 2 and the second single-sided fleece 3 is 85-90%, and the mass percentage of polyester fiber is 10-15%.

[0021] In this invention, the polyurethane hose is cylindrical in shape.

[0022] In this invention, the polyurethane joint strip 4 is made of polyurethane, and the polyurethane joint strip 4 is bonded to the joint of the polyurethane hose by heat fusion.

[0023] The polyurethane composite lined hose for air-turnover repair of this utility model has a double-layer fleece fabric inside, which is made of a mixture of acrylic and polyester. The polyurethane granules are extruded and cast into a polyurethane film layer 1, which is then laminated onto the surface of the acrylic-polyester double-layer fleece fabric layer. This results in stronger adhesion, contains no adhesive, and is formed in one step, ultimately achieving the best effect in completing the engineering operation and fully utilizing the characteristics of polyurethane materials. The joint edges of the polyurethane composite lined hose for air-turnover repair of this utility model are sewn with high-strength thread and then hot-pressed with polyurethane joint strips at high temperature. Finally, trenchless lined repair hoses of different diameters are made according to different working pipes.

[0024] The polyurethane composite lined flexible tube for air-return repair of this utility model is manufactured through the following steps: Step 1: After extruding and casting polyurethane granules into polyurethane film layer 1, the polyurethane granules are laminated onto the surface of a double-layer fleece fabric layer made of acrylic and polyester blend. Step 2: Cut the raw materials according to the different diameters of the pipes to be repaired; Step 3: Use high-strength thread and stitching material to form a pipe by joining the edges; Step 4: Heat the polyurethane joint strip 4 at high temperature and attach it to the joint of the polyurethane hose to form the polyurethane composite inner lining hose for air-turning repair of this utility model.

[0025] By adopting the above technical solution, the inner-lined hose has the advantages of corrosion resistance and wear resistance, high material strength, small pipe cross-sectional area loss, smooth surface, reduced water flow friction, and improved pipe flow capacity. All materials are environmentally friendly and made of highly flexible base material. It can be changed to a maximum of 2 diameters, with a pressure resistance of up to 0.8 bar and a high temperature resistance of up to 70 degrees Celsius. Under these conditions, the pressure resistance can reach up to 0.5 bar, making it suitable for variable diameter pipes.

[0026] All parts not covered in this utility model are the same as or can be implemented using existing technologies, and will not be described in detail here.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A polyurethane composite lined flexible tube for air-to-air repair, characterized in that, It includes an outer polyurethane film layer and an inner double-layer fleece layer. The double-layer fleece layer is made of two layers of single-sided fleece made of acrylic and polyester blended together. The polyurethane film layer is laminated on the surface of the double-layer fleece layer. The seams of the polyurethane film layer are fixed and sealed by heat fusion through polyurethane seam strips. The seams of the double-layer fleece layer are spliced ​​by high-strength thread sewing.

2. The polyurethane composite liner hose for air-lift repair as described in claim 1, characterized in that, The polyurethane film layer is made by extruding polyurethane granules through an extruder, casting them into a film, and then laminating them onto the surface of the double-layer fleece layer.

3. The polyurethane composite liner hose for air-lift repair as described in claim 1, characterized in that, Two layers of single-sided fleece fabric made of acrylic and polyester are stacked with their napped sides facing each other and punched together by a high-speed needle punching machine to form the double-layer fleece fabric.

4. The polyurethane composite liner hose for air-lift repair as described in claim 1, characterized in that, The polyurethane composite liner hose used for the air-over repair method is cylindrical in shape.

5. The polyurethane composite liner hose for air-lift repair as described in claim 1, characterized in that, The polyurethane joint strip is made of polyurethane, and the polyurethane joint strip is bonded to the joint of the polyurethane composite inner lining hose used for air-turn repair by hot melting.

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