Four-layer composite pipe wall structure

Abstract

The utility model relates to the technical field of building materials and pipeline engineering, and discloses a four-layer composite pipe wall structure which comprises a pipeline shell, an inner pipeline and a pipe orifice, the inner part of the pipeline shell is fixedly connected to the inner pipeline, and a four-layer composite material structure is fixedly connected between the pipeline shell and the inner pipeline. One side of the pipeline shell is fixedly connected to a pipe opening, the surface of the inner pipeline is fixedly connected to polyurethane anti-corrosion layers, the interior of the pipeline shell is fixedly connected to the polyurethane anti-corrosion layers, the interiors of the polyurethane anti-corrosion layers are fixedly connected to an HDPE waterproof layer, and the interiors of the HDPE waterproof layer are fixedly connected to an aerogel heat preservation layer. Through the arrangement of the four-layer composite material structure, the four-in-one function of heat preservation, water resistance, frost heaving resistance and corrosion resistance can be conveniently achieved, the flexible HDPE layer relieves the deformation stress of the rigid structure layer, the polyurethane layer fills micropores in the surface of aerogel, the overall compactness is improved, and through the matching of the sequence and the thickness, the temperature difference stress is remarkably reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of building materials and pipeline engineering, specifically to a four-layer composite pipe wall structure. BACKGROUND

[0002] Pipeline engineering is an important part of modern infrastructure, and is throughout in many fields such as energy transportation, water resource management, urban drainage and industrial process. As the lifeline connecting production and consumption, pipeline engineering provides strong support for social development with its characteristics of high efficiency, safety and environmental protection. From long-distance transportation of oil and natural gas, to construction of urban water supply and drainage system, to accurate transmission of fluid in the industrial field, pipeline engineering plays an irreplaceable role in ensuring resource supply, optimizing resource allocation and improving environmental quality.

[0003] However, it still has some shortcomings, for example: the pipe thermal insulation performance is insufficient, resulting in heat loss or frost damage, the waterproof layer is easy to be corroded or mechanically damaged, thereby causing leakage problems, the anticorrosion layer and the structure layer have weak bonding force, and delamination failure phenomenon may occur after long-term service, in addition, the thermal performance of the multi-layer structure is not optimized in coordination, and it is difficult to meet the demand under severe working conditions. These problems restrict the further development and application effect of the technology.

[0004] To solve the above problems, a four-layer composite pipe wall structure is proposed in the present application. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at providing a four-layer composite pipe wall structure to solve the problems of poor thermal insulation, easy corrosion of waterproof layer, weak combination of anticorrosion layer and structure layer, and uncoordinated thermal performance.

[0006] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is as follows: a four-layer composite pipe wall structure, comprising a pipeline shell, an inner pipeline and a pipe opening, the inner pipeline is fixedly connected inside the pipeline shell, the pipeline shell and the inner pipeline are fixedly connected with a four-layer composite material structure, the four-layer composite material structure is convenient for forming the functions of thermal insulation, waterproof, frost resistance and corrosion resistance, the flexible HDPE waterproof layer relieves the deformation stress of the rigid structure layer, the polyurethane anticorrosion layer fills the micropores on the surface of aerogel, and the overall compactness is improved, and the temperature difference stress is significantly reduced through the sequence and thickness ratio of layers.

[0007] Preferably, one side of the pipeline shell is fixedly connected with the pipe opening, and the surface of the inner pipeline is fixedly connected with the polyurethane anticorrosion layer.

[0008] Preferably, the inner pipeline of the pipeline shell is fixedly connected with the polyurethane anticorrosion layer, and the polyurethane anticorrosion layer is provided with two groups.

[0009] Preferably, the polyurethane anticorrosive layer is fixedly connected to the HDPE waterproof layer, and the HDPE waterproof layer is fixedly connected to the aerogel thermal insulation layer.

[0010] Preferably, the aerogel thermal insulation layer is fixedly connected to the reinforced concrete structure layer, and the reinforced concrete structure layer is fixedly connected to the polyurethane anticorrosive layer.

[0011] Preferably, the reinforced concrete structure layer is fixedly connected to the steel mesh, and the four-layer composite material structure realizes the functions of thermal insulation, waterproofing, frost heaving resistance and corrosion resistance through the synergistic design of the aerogel thermal insulation layer, the HDPE waterproof layer, the reinforced concrete structure layer and the polyurethane anticorrosive layer, and the polyurethane anticorrosive layer is formed by spraying and molding, the reinforced concrete structure layer is internally provided with a steel mesh and is formed by pouring concrete, the HDPE waterproof layer is formed by hot melt welding into a continuous film, the aerogel thermal insulation layer is made of a silica aerogel composite material which has extremely low thermal conductivity and can effectively prevent heat transfer, the HDPE waterproof layer and the aerogel thermal insulation layer are transitioned by using an epoxy resin adhesive, the welding process for the HDPE waterproof layer is performed at a hot melt temperature of 200-230 DEG C and a pressure of 0.2-0.5 MPa, and the overlap width at the connection position needs to meet certain width requirements to ensure the firmness and sealing performance of the connection, the hardness of the four-layer composite material structure reaches a high hardness standard measured by a Shore D hardness tester, the overall performance of the four-layer composite material structure has a compressive strength of not less than 30 MPa, a water vapor permeability of not more than 0.1 g / m2 / day, and no cracking after 100 freeze-thaw cycles at minus 40 DEG C, and the material surface has no corrosion after being soaked in a 10% sulfuric acid solution for 30 days, which fully proves the excellent chemical corrosion resistance of the material.

[0012] Compared with the prior art, the four-layer composite material structure has the following advantages:

[0013] This invention utilizes a four-layer composite material structure to integrate heat preservation, waterproofing, frost resistance, and corrosion resistance into a single function. The flexible HDPE layer alleviates the deformation stress of the rigid structural layer, while the polyurethane layer fills the micropores on the aerogel surface, improving the overall density. Through the layer sequence and thickness ratio, thermal stress is significantly reduced. Attached Figure Description

[0014] Fig. 1 This is a schematic diagram of the overall structure of a four-layer composite pipe wall structure according to the present invention;

[0015] Fig. 2 This is a schematic diagram of the cross-sectional structure of a four-layer composite material structure of a four-layer composite pipe wall according to the present invention;

[0016] Fig. 3 This is a schematic diagram of the internal structure of a four-layer composite material structure of a four-layer composite pipe wall structure according to the present invention.

[0017] In the diagram: 1. Pipe outer shell; 2. Inner pipe; 3. Pipe opening; 4. Four-layer composite material structure; 5. Polyurethane anti-corrosion layer; 6. HDPE waterproof layer; 7. Aerogel insulation layer; 8. Reinforced concrete structural layer; 81. Steel mesh. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Please see Figs. 1-3 A four-layer composite pipe wall structure includes a pipe shell 1, an inner pipe 2, and a pipe opening 3. The inner pipe 2 is fixedly connected to the pipe shell 1. The pipe shell 1 and the inner pipe 2 are fixedly connected to a four-layer composite material structure 4. The four-layer composite material structure 4 facilitates the integration of heat preservation, waterproofing, frost resistance, and corrosion resistance into a single function. The flexible HDPE waterproof layer 6 relieves the deformation stress of the rigid structural layer. The polyurethane anti-corrosion layer 5 fills the micropores on the aerogel surface and improves the overall density. Through the layer sequence and thickness ratio, the thermal stress is significantly reduced.

[0020] In this embodiment, as shown... Figs. 1-2 As shown, the outer shell 1 of the pipe is fixedly connected to the pipe port 3 on one side, the surface of the inner pipe 2 is fixedly connected to the polyurethane anti-corrosion layer 5, and the inner shell 1 is fixedly connected to the polyurethane anti-corrosion layer 5. The polyurethane anti-corrosion layer 5 is provided in two sets. One set of the polyurethane anti-corrosion layer 5 is fixedly connected to the HDPE waterproof layer 6, the HDPE waterproof layer 6 is fixedly connected to the aerogel insulation layer 7, the aerogel insulation layer 7 is fixedly connected to the reinforced concrete structure layer 8, and the reinforced concrete structure layer 8 is fixedly connected to the polyurethane anti-corrosion layer 5.

[0021] As shown in the embodiment Fig. 3 The steel reinforced concrete layer 8 is fixedly connected to the steel mesh 81 inside the four-layer composite material structure 4. In use, through the four-layer collaborative design of the aerogel thermal insulation layer 7, the HDPE waterproof layer 6, the steel reinforced concrete layer 8, and the polyurethane corrosion-resistant layer 5, the four-layer composite material structure 4 realizes the functions of thermal insulation, waterproofing, frost heaving resistance, and corrosion resistance. In terms of structure, the polyurethane corrosion-resistant layer 5 is spray-formed and resistant to acid, alkali, and microbial erosion. The steel reinforced concrete layer 8 has the steel mesh 81 embedded inside and is poured with concrete. The HDPE waterproof layer 6 is a continuous film formed by hot melt welding, with high joint strength. The aerogel thermal insulation layer 7 uses silica aerogel composite material, which has extremely low thermal conductivity and can effectively prevent heat transfer. In terms of process, the HDPE waterproof layer 6 and the aerogel thermal insulation layer 7 are transitioned using epoxy resin adhesive with high bonding strength. The welding process used for the HDPE waterproof layer 6 has a hot melt temperature of 200 to 230 degrees Celsius and a pressure of 0.2 to 0.5 megapascals. The overlap width at the connection needs to meet certain width requirements to ensure the firmness and sealing of the connection. The hardness reaches a high hardness standard measured by a Shore D hardness tester. The overall performance of the four-layer composite material structure 4 has a compressive strength of not less than 30 megapascals, excellent pressure-bearing capacity, a water vapor permeability of less than 0.1 grams per square meter per day, excellent moisture resistance, no cracking after 100 freeze-thaw cycles under extreme conditions of minus 40 degrees Celsius, excellent cold resistance and structural stability, and no corrosion on the material surface after soaking in 10% sulfuric acid solution for 30 days, fully demonstrating its excellent chemical corrosion resistance. These characteristics together ensure the reliability and durability of the composite material structure in various harsh environments. The advantages of the four-layer composite material structure 4 are: first, its life cycle cost can be reduced by 30%, effectively reducing maintenance frequency and saving long-term expenses for users; second, the structure design can adapt to extreme environments such as high cold and strong corrosion, ensuring stability and durability under various harsh conditions; and third, through modular construction, the on-site assembly efficiency is improved by 400%, not only shortening the construction period but also improving the construction quality and safety. These advantages make the four-layer composite material structure 4 an ideal choice for modern engineering construction.

[0022] Working principle

[0023] The four-layer composite material structure 4 is convenient for forming the functions of heat preservation, waterproofing, frost heaving resistance and corrosion resistance, the flexible HDPE waterproof layer 6 relieves the deformation stress of the rigid structure layer, the polyurethane corrosion-resistant layer 5 fills the micropores on the surface of the aerogel and improves the overall compactness, the temperature difference stress is significantly reduced through the layer sequence and thickness ratio, and the four-layer composite material structure 4, in use, through the four-layer collaborative design of the aerogel heat preservation layer 7, the HDPE waterproof layer 6, the reinforced concrete structure layer 8 and the polyurethane corrosion-resistant layer 5, realizes the functions of heat preservation, waterproofing, frost heaving resistance and corrosion resistance by the low thermal conductivity of the aerogel, the high barrier property of the HDPE, the high strength of the reinforced concrete and the chemical inertness of the polyurethane, on the structure, the polyurethane corrosion-resistant layer 5 is formed by spraying, is resistant to acid and alkali and microbial erosion, the reinforced concrete structure layer 8 is internally provided with a steel mesh 81 and is poured with concrete, the HDPE waterproof layer 6 is formed into a continuous film through hot melting welding, has high joint strength, the aerogel heat preservation layer 7 uses a silica aerogel material, the material has extremely low thermal conductivity and can effectively prevent heat transfer, on the process, the HDPE waterproof layer 6 and the aerogel heat preservation layer 7 are transitioned by using an epoxy resin adhesive, the adhesive strength is relatively high, the welding process used by the HDPE waterproof layer 6 is that the hot melting temperature is two hundred to two hundred and thirty degrees Celsius, the pressure is zero point two to zero point five megapascals, and the overlap width of the connection part needs to meet certain width requirements, so as to ensure the firmness and sealing performance of the connection, the hardness reaches a relatively high hardness standard measured by a Shore D type hardness tester, the overall performance of the four-layer composite material structure 4 has a compressive strength of not less than thirty megapascals, has excellent pressure bearing capacity, the water vapor permeability is controlled to be less than or equal to zero point one gram per square meter per day, and excellent moisture resistance is exhibited, after one hundred freeze-thaw cycles under the extreme condition of minus forty degrees Celsius, there is no cracking phenomenon, and excellent cold resistance and structural stability are exhibited, in addition, after being soaked in a ten percent sulfuric acid solution for thirty days, there is no any corrosion on the material surface, and the excellent chemical corrosion resistance is fully proved, these characteristics jointly ensure the reliability and durability of the composite material structure in various harsh environments, the advantages brought by the four-layer composite material structure 4 are that, firstly, the life cycle cost can be reduced by thirty percent, the maintenance frequency is effectively reduced, long-term expenses of users are saved, secondly, the structure design can adapt to extremely cold and highly corrosive environments and ensure stability and durability under various adverse conditions, and finally, through the modular construction mode, the on-site assembly efficiency is greatly improved by fourty percent, the construction period is shortened, and the construction quality and safety are improved, these advantages make the four-layer composite material structure 4 become an ideal choice in modern engineering construction

[0024] Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

Claims

1. A four-layer composite pipe wall structure comprising a pipe shell (1), an inner pipe (2) and a pipe mouth (3), characterized in that: The pipeline shell (1) is fixedly connected to the inner pipeline (2) inside, and a four-layer composite material structure (4) is fixedly connected between the pipeline shell (1) and the inner pipeline (2).

2. A four-layer composite pipe wall structure according to claim 1, characterized in that: One side of the pipeline shell (1) is fixedly connected to the pipe opening (3), and the surface of the inner pipeline (2) is fixedly connected to a polyurethane corrosion-proof layer (5).

3. A four-layer composite pipe wall structure according to claim 2, wherein: The pipeline shell (1) is fixedly connected to the polyurethane corrosion-proof layer (5) inside, and the polyurethane corrosion-proof layer (5) is provided with two groups.

4. A four-layer composite pipe wall structure according to claim 3, wherein: One group of the polyurethane corrosion-proof layer (5) is fixedly connected to an HDPE waterproof layer (6) inside, the HDPE waterproof layer (6) is fixedly connected to an aerogel thermal insulation layer (7) inside.

5. A four layer composite pipe wall structure according to claim 4, wherein: The aerogel thermal insulation layer (7) is fixedly connected to a reinforced concrete structure layer (8) inside, and the reinforced concrete structure layer (8) is fixedly connected to the polyurethane corrosion-proof layer (5) inside.

6. A four layer composite pipe wall structure according to claim 5, wherein: The reinforced concrete structure layer (8) is fixedly connected to a steel mesh (81) inside.

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