A local repair material for drainage pipe repair and use method thereof

Abstract

The present invention provides a local repair material for drainage pipe repair and a method of using the same, which relates to the technical field of pipe repair. The repair material comprises a photosensitive resin matrix and a water-resistant adhesive. The repair material and the repair method of the present invention not only greatly shorten the curing time, but also effectively improve the overall mechanical properties of the repair material, solving the dual problems of the traditional pipe repair material in terms of curing speed and material strength.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline repair, and in particular to a pipeline repair composition with rapid solidification and enhanced mechanical properties and a use method thereof. Background Art

[0002] In pipeline repair technology, in-situ curing is a common repair method, especially widely used in underground pipeline maintenance. However, the traditional in-situ curing method has problems such as long curing time, slow project progress and increased labor costs; secondly, due to the low mechanical properties of the material, it is easy to deform or rupture when subjected to external pressure or water flow impact, reducing the safety and service life of the repaired pipeline; thirdly, due to the uncontrollability of the curing process during construction, the repair quality is often unstable. With the acceleration of urbanization, the requirements for pipeline repair speed and quality are increasing, and the existing pipeline repair technology is difficult to meet the needs of efficient, fast and high-quality repairs.

[0003] In order to shorten the curing time and improve material performance, the industry has explored a series of improvement measures, such as using pre-cured pipes and adding reinforcing fibers, but these methods either increase the difficulty of construction or fail to significantly improve the contradiction between the curing rate and the material strength, especially when dealing with sudden damage. Therefore, the research and development of new pipeline repair materials that have both rapid curing and good mechanical properties has become a hot topic in the industry. In recent years, with the development of new materials science, especially the progress of photosensitive resin technology, new ideas have been provided to solve this technical bottleneck. Using the principle of ultraviolet light (UV) to induce rapid curing, the development of pipeline repair materials with strong adaptability, fast curing and high strength has become an important trend in the current research and development of pipeline repair technology. Summary of the invention

[0004] In order to solve the problems faced by existing curing and repair methods, such as long curing cycle, limited material strength, and low construction efficiency, the present invention provides a local repair material for drainage pipe repair that has fast curing and enhanced mechanical properties and a method for using the material. Specifically:

[0005] A local repair material for repairing a drainage pipe comprises a photosensitive resin matrix and a water-resistant adhesive.

[0006] Furthermore, the photosensitive resin matrix is ​​selected from photocurable isophenyl neopentyl glycol unsaturated polyester resin or its prepreg, and the water-resistant binder is selected from a single-component acrylic adhesive.

[0007] Furthermore, the mass ratio of the photosensitive resin matrix to the water-resistant binder is 10:(1-1.5), and the preferred ratio is 10:1.5.

[0008] The present invention also provides a method for repairing a pipeline using the above-mentioned local repair material, comprising:

[0009] Step S1, mixing the photosensitive resin matrix material and the water-resistant adhesive in proportion to form a composite repair liquid;

[0010] Step S2, uniformly covering the surface of the drainage lining hose with the base material impregnated with the composite repair liquid; or directly and uniformly coating the surface of the drainage lining hose with the composite repair liquid;

[0011] Step S3, placing the drainage lining hose obtained in the previous step at a suitable position inside the pipeline to be repaired;

[0012] Step S4: Press the drainage lining hose to the surface of the pipe to be repaired, and irradiate ultraviolet light to quickly solidify the composite repair liquid to form a solid structural layer and a repair adhesive layer.

[0013] Furthermore, in step S2, the base material is selected from glass fiber cloth.

[0014] Furthermore, in step S2, the drainage lining hose is selected from ultraviolet light (wavelength 365-420nm) curing repair lining hose (UV-CIPP), and the ultraviolet light wavelength is preferably 390nm.

[0015] Furthermore, in step S4, an air bag is used to press the drainage lining hose to the surface of the pipeline to be repaired.

[0016] Furthermore, in step S4, the ultraviolet light irradiation time is 5-15 minutes.

[0017] The present invention not only greatly shortens the curing time but also effectively improves the overall mechanical properties of the repair material by adding a water-resistant adhesive additive to the photosensitive resin matrix, thereby solving the dual problems of traditional pipeline repair materials in terms of curing speed and material strength.

[0018] The technical solution of the present invention has the following beneficial effects:

[0019] The photosensitive resin matrix material and the water-resistant adhesive additive in the present invention have a synergistic effect. Firstly, both the photosensitive resin and the water-resistant adhesive are ultraviolet light-initiated, and the ultraviolet light initiation wavelength is similar, which belongs to long-wave ultraviolet light (365-420nm for the photosensitive resin and 390nm for the water-resistant adhesive); secondly, the curing rate of the water-resistant adhesive is faster than that of the photosensitive resin (the curing rate of the water-resistant adhesive is 1-10s, and that of the photosensitive resin is about 1min). Under the condition of a mass ratio of 10:1.5 and under the initiation of ultraviolet light with a wavelength of 365-420nm, the water-resistant adhesive is cured before the photosensitive resin, and a water-proof layer and an adhesive layer are formed between the outer layer of the material and the pipeline to be repaired, thereby achieving the ability of bonding and water blocking. The technical solution of the present invention significantly shortens the curing time of pipeline repair materials and improves construction efficiency; improves the mechanical properties of the repair materials, enhances the stability and pressure-bearing capacity of the repaired parts, and extends the service life of the repaired pipeline; realizes the controllability of the curing process, improves the consistency of the repair quality, and reduces the quality risks caused by poor curing. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clear, the technical solution of the present invention will be described in detail below in conjunction with specific embodiments.

[0021] Example 1

[0022] Using isophenyl neopentyl glycol unsaturated polyester resin as the base material, 15% mass fraction of acrylic adhesive was added to the base material, and after stirring evenly, it was applied to the UV-CIPP drainage lining hose, and then irradiated under ultraviolet light for 15 minutes to form a cured layer with excellent adhesion and mechanical strength. The bending elastic modulus of the lining pipe and the bonding layer is 10000MPa, and the bonding strength to the original pipe is greater than 2MPa.

[0023] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A local repair material for drainage pipe repair, characterized in that: include: Photosensitive resin matrix and water-resistant binder.

2. The local repair material according to claim 1, characterized in that: The photosensitive resin matrix is ​​selected from photocurable isophenyl neopentyl glycol unsaturated polyester resin or its prepreg, and the water-resistant binder is selected from single-component acrylic adhesive.

3. The local repair material according to claim 1, characterized in that: The mass ratio of the photosensitive resin matrix to the water-resistant binder is 10:(1-1.5), and the preferred ratio is 10:1.

5.

4. A method for repairing a pipeline using the local repair material according to any one of claims 1 to 3, characterized in that: include: Step S1, mixing the photosensitive resin matrix material and the water-resistant adhesive in proportion to form a composite repair liquid; Step S2, uniformly covering the surface of the drainage lining hose with the base material impregnated with the composite repair liquid; or directly and uniformly coating the surface of the drainage lining hose with the composite repair liquid; Step S3, placing the drainage lining hose obtained in the previous step at a suitable position inside the pipeline to be repaired; Step S4: Press the drainage lining hose to the surface of the pipe to be repaired, and irradiate ultraviolet light to quickly solidify the composite repair liquid to form a solid structural layer and a repair adhesive layer.

5. The method according to claim 4, characterized in that In step S2, the base material is selected from glass fiber cloth.

6. The method according to claim 4, characterized in that In step S2, the drainage lining hose is selected from a UV-curing repair lining hose.

7. The method according to claim 4, characterized in that In step S4, an air bag is used to press the drainage lining hose to the surface of the pipeline to be repaired.

8. The method according to claim 4, characterized in that The ultraviolet light irradiation time in step S4 is 5-15 minutes.