Polyurethane hose

Abstract

The utility model discloses a polyurethane hose, and relates to the technical field of pipeline repair. The polyurethane hose is characterized in that single-sided flannelette is arranged in the polyurethane hose, the single-sided flannelette is made of polyester, a polyurethane film layer is arranged outside the polyester single-sided flannelette, and the polyurethane film layer is fixedly connected with the polyester single-sided flannelette in a film casting mode. According to the polyurethane hose, firstly, polyurethane particles are heated, extruded through an extruder and fixed to the polyester single-face flannelette in a film casting mode to be used for manufacturing the lining pipe, and then the lining pipe is fixed to the polyester single-face flannelette in a film casting mode to be used for manufacturing the lining pipe. The resin material enters the to-be-repaired pipeline through water gravity overturning, air pressure overturning or traction and dragging, the resin material is promoted to be cured in the modes of normal-temperature curing, ultraviolet curing and the like, a new lining pipeline is formed, extremely high flexibility and expansibility are achieved, and lining can be achieved only by slightly generating wrinkles.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline repair, in particular to a polyurethane hose. Background Art

[0002] Trenchless repair refers to the renewal and repair of underground pipelines with minimal surface excavation. It originated in the UK and has been widely developed in Germany. The application of this technology does not impede traffic, damage green spaces or vegetation, or affect the normal life and work order of shops, hospitals, schools and residents. It solves the interference of traditional excavation construction to residents' lives, as well as the damage and adverse effects on traffic, the environment and the foundations of surrounding buildings. Polyurethane hoses are required for this purpose.

[0003] Existing polyurethane hoses may not be able to adapt to the shapes of pipelines at different angles during use. At the same time, existing hoses have certain deficiencies in corrosion resistance and abrasion resistance. Gaps are easily generated between the hoses and the inner wall of the repaired pipeline during installation, and wrinkles are easily formed on the inner wall of the pipeline during long-term use, increasing the friction of water flow and reducing the water flow capacity. Summary of the Utility Model

[0004] Based on this, the purpose of the utility model is to provide a polyurethane hose to solve the technical problems that it cannot adapt to the shapes of different pipelines and gaps are easily generated between the hose and the inner wall of the repaired pipeline during installation.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: A polyurethane hose, wherein a single-sided flannelette is arranged inside the polyurethane hose, the material of the single-sided flannelette is polyester, a polyurethane film layer is arranged outside the polyester single-sided flannelette, the polyurethane film layer is fixedly connected with the polyester single-sided flannelette by means of casting film formation, both sides of the repair mechanism are sewn by high-strength threads to form a seam, a seam strip is connected to the seam by high-temperature hot melting, both sides of the raw material of the polyurethane hose are sewn by high-strength threads to form a seam, a seam strip is connected to the seam by high-temperature hot melting, and the seam strip is a polyurethane film strip.

[0006] By adopting the above technical scheme, the polyester single-sided flannelette can provide an attachment surface for the polyurethane film layer to complete the fixation of the polyurethane film layer. The installation method of casting film formation of the polyurethane film layer can improve the structural compactness with the polyester single-sided flannelette, and the adhesion strength is stronger. It does not contain any adhesives and is formed in one step, finally achieving the best effect of engineering operations, giving full play to the characteristics of polyurethane materials. After docking, both sides are sewn by high-strength threads to form a seam, and lining repair hoses with different pipe diameters can be made according to different working pipelines, so that the composite body can form a pipeline with a specified radius. A high-temperature hot-melt seam strip is used on the seam to prevent gaps from existing after curing due to the presence of the seam, resulting in water leakage.

[0007] Furthermore, the width of the polyurethane film layer is the circumferential length of the pipeline to be repaired. The material of the polyester single-sided flannelette is made of all-polyester material, and the polyurethane film layer is made of polyurethane material.

[0008] By adopting the above technical solution, the polyester material can ensure the firm fixation of the polyester single-sided flannelette and the polyurethane film layer, with stronger bonding fastness, and no adhesives are required during connection, which is beneficial to protecting the surrounding environment and preventing harm to the workers' bodies. The polyurethane film layer made of polyurethane material has the advantages of corrosion resistance and wear resistance, with high material strength, small loss of pipeline cross-sectional area, smooth surface, reduced water flow friction, and improved pipeline flow capacity.

[0009] Furthermore, the polyurethane film layer and the polyester single-sided flannelette are arranged in sequence from outside to inside.

[0010] By adopting the above technical solution, the polyurethane film layer and the polyester single-sided flannelette are arranged in sequence from outside to inside, enabling the use of the flexibility, excellent scratch resistance, corrosion resistance, and high strength performance of polyurethane to achieve full connection with the inner wall of the pipeline to be repaired inside the repaired pipeline, and it can repair elbows with an angle ≤ 45°C and pipelines of different shapes: circular, oval, square, or special-shaped pipelines.

[0011] Furthermore, the joint strip is arranged in a rectangular structure, and the material of the joint strip is polyurethane material.

[0012] By adopting the above technical solution, the rectangular joint strip can effectively seal the joint. At the same time, the polyurethane material can help to fuse with the polyurethane film layer to prevent the situation of insecure connection. The joint strip extends along the length direction of the hose and fits on the joint.

[0013] In summary, the present utility model mainly has the following beneficial effects: This lining repair hose is particularly suitable for lining in the field of the house connection sewer system. The lining hose is pressurized to 0.2 bar, and the expansion coefficient of the lining hose is about 13%. The lining hose is pressurized to 0.5 bar, and the expansion coefficient of the lining hose is about 35%. The lining hose is pressurized to 0.7 bar, and the expansion coefficient of the lining hose is about 50%. It has extremely high flexibility and expansibility, and can achieve lining with only slight wrinkles.

[0014] 1. The utility model fixes polyurethane particles to a polyester single-sided flannelette by extruding and casting them into a film through heating by an extruder for making a lining pipe. When installation is required later, the butt edges of the lining pipe are butted and sewn together with a high-strength thread, and then a polyurethane joint strip is used to complete the sealing of the joint through high-temperature hot pressing to make a lining pipe to be inverted. Then, it is turned into the pipe to be repaired through water gravity inversion, air pressure inversion or traction dragging. After the lining pipe to be inverted is completely installed in the pipe, resin materials are cured by means of normal temperature curing, heating curing or ultraviolet light curing, etc. After the resin materials are cured, the lining pipe impregnated with the resin materials hardens, and a new lining pipe will be formed in the original pipe. This trenchless lining repair polyurethane hose is particularly suitable for lining in the field of the sewer system connecting houses, has extremely high flexibility and expansibility, and can realize lining only by slightly generating wrinkles, solving the problem that gaps are easily generated between the lining pipe during installation and the inner wall of the repaired pipe.

[0015] 2. When the utility model is inverted by air pressure or hot water, the internal single-sided flannelette is closely attached to the inner wall of the pipe, realizing the close attachment to the pipe and preventing gaps from being generated between the cured pipe and the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of the raw material of the polyurethane hose of the utility model;

[0017] Figure 2 It is a three-dimensional structure schematic diagram of the polyurethane hose of the utility model;

[0018] Figure 3 It is a cross-sectional view of the pipe after the construction of the polyurethane hose of the utility model;

[0019] In the figure: 1. Joint strip; 2. Polyurethane film layer; 3. Polyester single-sided flannelette; 4. Pipe to be repaired; 5. Material butt joint. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and cannot be understood as a limitation to the present utility model.

[0021] The embodiments of the present utility model will be described below according to the overall structure of the present utility model.

[0022] A polyurethane lining hose, as Figures 1 - 3As shown in the figure, a polyester single-sided flannelette 3 is arranged inside the polyurethane-lined hose. A polyurethane film layer 2 is arranged on the polyester single-sided flannelette 3. The polyurethane film layer 2 is fixedly connected to the polyester single-sided flannelette 3 by means of casting film formation, without any adhesive in the middle, and is formed in one step, finally achieving the best effect of engineering operations, giving full play to the characteristics of the polyurethane material. The two sides are sewn with high-strength threads to form a material docking seam 5. A seam pressing strip 1 is hot-melt bonded to the material docking seam 5 at high temperature to prevent gaps from occurring after curing due to the existence of the seam, resulting in water leakage. Non-excavation lining repair hoses with different diameters are made according to different working pipes, so that the composite body can form a lining hose with a specified radius. The material of the polyester single-sided flannelette 3 is composed of all-polyester material, and the polyurethane film layer 2 is made of polyurethane material. The polyester material can ensure the firm fixation of the polyester single-sided flannelette 3 and the polyurethane film layer 2, with stronger adhesion fastness, and no adhesive is required during connection, which is beneficial to protecting the surrounding environment and preventing harm to the workers' bodies. The polyurethane film layer 2 made of polyurethane material has the advantages of corrosion resistance and wear resistance, with high material strength, small loss of pipeline cross-sectional area, smooth surface, reduced water flow friction, and improved pipeline flow capacity.

[0023] Refer to Figure 2 , the polyurethane film layer 2 and the polyester single-sided flannelette 3 are arranged in sequence from the outside to the inside, so as to utilize the flexibility, excellent scratch resistance, corrosion resistance and high strength performance of polyurethane to make it fully connected with the inner wall of the pipeline to be repaired in the repaired pipeline, and the elbow angle that can be repaired is ≤ 45 °C and pipelines of different shapes: circular, oval, square or special-shaped pipelines.

[0024] Refer to Figure 2 , the seam pressing strip 1 is arranged in a rectangular structure, and the material of the seam pressing strip 1 is made of polyurethane material. The rectangular seam pressing strip 1 can effectively seal the seam, and at the same time, the polyurethane material can help to fuse with the polyurethane film layer 2 to prevent the situation of insecure connection.

[0025] The implementation principle of this embodiment is as follows: First, the polyurethane film layer 2 is fixed to the polyester single-sided flannelette 3 by means of casting film formation for making the lining hose. The docking edges of the hose raw materials are butted and sewn with high-strength threads, and then the polyurethane seam pressing strip 1 is used to complete the sealing of the material docking seam 5 by high-temperature hot pressing to form this lining repair hose; then it is turned over into the pipeline 4 to be repaired through water gravity inversion, air pressure inversion or traction dragging. After the inverted lining pipe is completely installed in the pipeline, methods such as normal temperature curing, heating curing or ultraviolet light curing are used to promote the curing of the resin material. After the resin material is cured, the lining pipe impregnated with the resin material hardens, and a new lining pipeline will be formed in the original pipeline.

[0026] Parts not involved in the present utility model are the same as or can be implemented by using the prior art, and will not be elaborated here too much.

[0027] Although the embodiments of the present utility model have been shown and described, the specific embodiments are only explanations of the present utility model and are not limitations thereof. The specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art can, without departing from the principles and purposes of the present utility model, make modifications, substitutions and variations that do not contribute creatively to the embodiments as needed, but as long as they are within the scope of the claims of the present utility model, they are protected by the patent law.

Claims

1. A polyurethane hose, characterized in that: The inside of the polyurethane hose is provided with a polyester single-sided flannelette (3), the material of the polyester single-sided flannelette (3) is polyester, an outer side of the polyester single-sided flannelette (3) is provided with a polyurethane film layer (2), the polyurethane film layer (2) is fixedly connected with the polyester single-sided flannelette (3) by a casting film forming method, both sides of the raw material of the polyurethane hose are sewn by high-strength threads to form a material butt joint seam (5), and a seam pressing strip (1) is connected to the material butt joint seam (5) by high-temperature hot melting, and the seam pressing strip (1) is a polyurethane film strip.

2. The polyurethane hose according to claim 1, wherein: The width of the polyurethane film layer (2) is the circumference of the pipeline to be repaired (4).

3. The polyurethane hose according to claim 1, wherein: The material of the polyester single-sided flannelette (3) is composed of all-polyester material, and the polyurethane film layer (2) is made of polyurethane material.

4. The polyurethane hose according to claim 1, characterized in that: The polyurethane film layer (2) and the polyester single-sided flannelette (3) of the hose are arranged in sequence from inside to outside.

5. The polyurethane hose according to claim 1, characterized in that: The seam pressing strip (1) is arranged in a rectangular structure, and the material of the seam pressing strip (1) is polyurethane material.

6. The polyurethane hose according to claim 1, wherein: The seam pressing strip (1) extends along the length direction of the hose and fits on the joint.

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