Pressure-resistant and corrosion-resistant prefabricated pipe

Abstract

The utility model discloses a kind of pressure-resistant corrosion-resistant prefabricated pipes, it is related to prefabricated pipe technical field, specifically a kind of pressure-resistant corrosion-resistant prefabricated pipe, including pipeline, anticorrosive layer, compression layer, the anticorrosive layer includes first anticorrosive layer and second anticorrosive layer, the inside fixed connection of pipeline has first anticorrosive layer, the outside fixed connection of pipeline has compression layer, the outside fixed connection of compression layer has second anticorrosive layer, the outside fixed connection of second anticorrosive layer has trapezoidal ring. The pressure-resistant corrosion-resistant prefabricated pipe, by the cooperation setting of compression layer and trapezoidal ring, make the pipeline have the effect of compression resistance, in the process of using, both can resist the pressure generated by internal conveying medium, also can withstand the pressure exerted by external environment, to play the role of enhancing the stability of pipeline in high-pressure environment, to reduce maintenance frequency, the purpose of guaranteeing the long-term stable operation of conveying system.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated pipeline technology, specifically a pressure-resistant and corrosion-resistant prefabricated pipeline. Background Technology

[0002] Water conservancy projects are often watershed control projects, playing a crucial role in safeguarding the stability of the basin. The construction of water conservancy projects often drives local infrastructure development, creates numerous jobs, and promotes economic and social development in reservoir areas, as well as the stable prosperity of relocated residents.

[0003] Water pipelines are an indispensable part of water conservancy projects, and are widely used in building water supply, building drainage, buried drainage pipes and other fields.

[0004] Pipeline pressure resistance and corrosion resistance are both crucial and indispensable. Pressure resistance is the foundation of safe operation, ensuring that pipelines do not burst under high pressure and preventing production stoppages, safety accidents, and environmental pollution caused by media leaks. Corrosion resistance is key to determining lifespan and economic efficiency; it effectively resists chemical erosion, preventing pipe wall thinning and perforation, thereby significantly extending service life and reducing maintenance costs and downtime losses. Existing pipelines still have some shortcomings in terms of pressure and corrosion resistance. Utility Model Content

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a pressure-resistant and corrosion-resistant prefabricated pipe, which solves the problems mentioned in the background section.

[0006] (II) Technical Solution To achieve the above objectives, this utility model is implemented through the following technical solution: a pressure-resistant and corrosion-resistant prefabricated pipe, comprising a pipe, an anti-corrosion layer, and a pressure-resistant layer, wherein the anti-corrosion layer comprises a first anti-corrosion layer and a second anti-corrosion layer, the first anti-corrosion layer is fixedly connected to the inner side of the pipe, the pressure-resistant layer is fixedly connected to the outer side of the pipe, the second anti-corrosion layer is fixedly connected to the outer side of the pressure-resistant layer, and a trapezoidal ring is fixedly connected to the outer side of the second anti-corrosion layer.

[0007] Optionally, the pipe includes a pipe body, a socket end, and a spigot end, and the thickness of the pressure-resistant layer increases near the end face of the socket end.

[0008] Optionally, an annular groove is provided on the inner side of the socket end, and a rubber sealing ring is fixedly connected in the annular groove.

[0009] Optionally, the compressive strength layer is made of fiber-reinforced polymer, the first anti-corrosion layer is made of polymer anti-corrosion coating, and the second anti-corrosion layer is made of anti-corrosion tape.

[0010] Optionally, the trapezoidal ring includes a first trapezoidal ring and a second trapezoidal ring, both of which have rectangular plates fixedly connected to their sides, and the first trapezoidal ring and the second trapezoidal ring are connected by bolts and threads.

[0011] Optionally, the trapezoidal rings are of several kinds, and the trapezoidal rings are arranged at equal intervals.

[0012] This utility model provides a pressure-resistant and corrosion-resistant prefabricated pipe, which has the following beneficial effects: 1. This pressure-resistant and corrosion-resistant prefabricated pipeline, through the combination of pressure-resistant layer and trapezoidal ring, enables the pipeline to resist pressure. During use, it can resist the pressure generated by the internal transported medium and withstand the pressure exerted by the external environment, thereby enhancing the stability of the pipeline under high pressure environment, achieving the purpose of reducing maintenance frequency and ensuring the long-term stable operation of the transport system.

[0013] 2. This pressure-resistant and corrosion-resistant prefabricated pipeline, through the combined installation of the first and second anti-corrosion layers, ensures that both the inner and outer layers of the pipeline have anti-corrosion properties. During use, it can prevent corrosive substances from eroding the inner and outer walls of the pipeline, thereby improving the pipeline's corrosion resistance and achieving the goal of extending the pipeline's lifespan and reducing operation and maintenance costs. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a top view of the present invention; Figure 3 This is a schematic cross-sectional view of the present invention. Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 This is a schematic diagram of the trapezoidal ring explosion structure of this utility model; Figure 6 This is a schematic diagram of the annular groove and rubber sealing ring structure of this utility model.

[0015] In the diagram: 1. Pipe; 101. Pipe body; 102. Socket end; 103. Spiral end; 2. Anti-corrosion layer; 201. First anti-corrosion layer; 202. Second anti-corrosion layer; 3. Pressure-resistant layer; 4. Trapezoidal ring; 401. First trapezoidal ring; 402. Second trapezoidal ring; 403. Rectangular plate; 404. Bolt; 5. Annular groove; 6. Rubber sealing ring. Detailed Implementation

[0016] 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.

[0017] Please see Figures 1 to 6 The present invention provides a technical solution: a pressure-resistant and corrosion-resistant prefabricated pipe, including a pipe 1, an anti-corrosion layer 2, and a pressure-resistant layer 3. The anti-corrosion layer 2 includes a first anti-corrosion layer 201 and a second anti-corrosion layer 202. The first anti-corrosion layer 201 is fixedly connected to the inner side of the pipe 1, the pressure-resistant layer 3 is fixedly connected to the outer side of the pipe 1, the second anti-corrosion layer 202 is fixedly connected to the outer side of the pressure-resistant layer 3, and a trapezoidal ring 4 is fixedly connected to the outer side of the second anti-corrosion layer 202. Pipe 1 includes a pipe body 101, a socket end 102, and a spigot end 103. The thickness of the pressure-resistant layer 3 increases near the end face of the socket end 102. An annular groove 5 is provided on the inner side of the socket end 102, and a rubber sealing ring 6 is fixedly connected in the annular groove 5. The main body of the pipe 101 is a smooth cylinder, while there are usually steps, grooves or thickness changes at the joint. These sudden changes in geometry can lead to stress concentration. At the socket end 102, by gradually increasing the thickness of the pressure-resistant layer 3, the pressure resistance at the pipe joint can be improved to resist the additional pressure caused by stress concentration at the joint. The pressure-resistant layer 3 is made of fiber-reinforced polymer, the first anti-corrosion layer 201 is made of polymer anti-corrosion coating, and the second anti-corrosion layer 202 is made of anti-corrosion tape. Fiber-reinforced polymers (FRPs) are a new type of material composed of high-performance fiber materials and polymer matrices through specific processes. This material combines the high strength of fibers with the good processability of polymer matrices, exhibiting excellent comprehensive performance. Commonly used reinforcing fibers include carbon fiber, glass fiber, and aramid fiber, which have advantages such as high strength, high modulus, and lightweight. Commonly used polymer matrices include epoxy resin, polyester resin, and unsaturated polyester, which have good adhesion, corrosion resistance, and processability. Due to the addition of high-performance fibers, fiber-reinforced polymers have extremely high strength and modulus, far exceeding that of general metal and plastic materials. The polymer matrix has good corrosion resistance, enabling fiber-reinforced polymers to be used for a long time in harsh environments. Fiber-reinforced polymers have good plasticity and can be processed and molded through various processes to meet different application requirements. Polymer anti-corrosion coatings are anti-corrosion coatings with polymers as the film-forming component. Their main performance requirements are resistance to acid, alkali, salt, water, and some reagents. These coatings can be classified into four categories based on the film-forming polymer: Oxygen resin coatings have excellent alkali resistance and adhesion, but poor weather resistance, and are mostly used as primers; polyphenol coatings have low-temperature curing characteristics and are resistant to sunlight, but have weak water resistance; chlorinated polymer coatings include chlorinated rubber and perchlorinated vinyl, which have good resistance to water, salt, acid, and alkali, but are not resistant to high temperatures and organic solvents; acrylic resin coatings are polymerized from monomers such as acrylates, have excellent weather resistance and are resistant to photodegradation, and are mainly used as topcoats. Anti-corrosion tape is an adhesive tape used for wrapping around surfaces with a coating of anti-corrosion adhesive, using polyethylene, polypropylene fiber, or aluminum foil as the base material. Anti-corrosion tape products include polypropylene cold-applied tape, polyethylene cold-applied tape, and polyethylene tape. Polypropylene cold-applied tape uses high-strength polypropylene fiber fabric as the base material and butyl rubber modified asphalt as the anti-corrosion adhesive layer. Its excellent tensile strength and strong adhesion effectively resist soil stress, external forces, impacts, and thermal expansion, preventing deformation and peeling of the anti-corrosion layer. Aging tests have proven its corrosion resistance lifespan to be over 40-50 years. Polyethylene cold-applied tape is made from polyethylene sheets... The material is made by coating the surface with a layer of rubber-modified asphalt for bonding. Its design principle is to meet the corrosion protection requirements of humid geological areas and small-diameter pipelines. This product has excellent impact resistance, good toughness and tensile strength, and features resistance to moisture, thermal expansion, and wear. Polyethylene tape is made of polyethylene as the base material and butyl rubber as the adhesive layer, which are compounded under heat capacity. It is divided into inner tape, outer tape, and joint tape. The inner tape plays a role in corrosion protection, the outer tape plays a role in protection, and the joint tape is suitable for pipeline joints. It has good toughness and tensile strength, and features excellent resistance to moisture and thermal expansion. By combining the first anti-corrosion layer 201 and the second anti-corrosion layer 202, both the inner and outer layers of the pipeline 1 have anti-corrosion properties. During use, this prevents corrosive substances from eroding the inner and outer walls of the pipeline 1, thereby improving the pipeline's corrosion resistance and achieving the goal of extending the pipeline's lifespan and reducing maintenance costs. The trapezoidal ring 4 includes a first trapezoidal ring 401 and a second trapezoidal ring 402. Rectangular plates 403 are fixedly connected to the sides of both the first trapezoidal ring 401 and the second trapezoidal ring 402. The first trapezoidal ring 401 and the second trapezoidal ring 402 are connected by bolts 404. There are several trapezoidal rings 4, and the several trapezoidal rings 4 are arranged at equal intervals. When pipeline 1 is subjected to external pressure (e.g., deep burial, submarine pipeline, vacuuming conditions), its failure mode is instability, that is, the pipeline is crushed. This failure is not determined by the material strength, but by the stiffness (bending capacity) and geometry of the structure. The trapezoidal ring 4 is a ring-shaped rib with a trapezoidal cross section, which is equivalent to a circumferential reinforcing rib. They greatly increase the moment of inertia of the pipeline section at this part and enhance the stability of the pipeline structure. By combining the pressure-resistant layer 3 and the trapezoidal ring 4, the pipeline 1 achieves a pressure-resistant effect. During use, it can resist the pressure generated by the internal transported medium and withstand the pressure exerted by the external environment, thereby enhancing the stability of the pipeline under high pressure conditions and achieving the goal of reducing maintenance frequency and ensuring the long-term stable operation of the transport system.

[0018] In use, firstly, according to the required external pressure of the pipeline 1, a suitable number of trapezoidal rings 4 are installed on the outside of the pipeline body 101. During installation, the first trapezoidal ring 401 and the second trapezoidal ring 402 are fitted onto the outside of the pipeline body 101 and the bolts 404 are tightened to complete the installation. Then, the pipeline 1 is hoisted to the predetermined position, and the spigot end 103 of the pipeline 1 is inserted into the socket end 102 to complete the pipeline assembly. After assembly, it can be used. The trapezoidal rings 4 installed on the outside of the pipeline body 101 can resist external pressure. The pressure-resistant layer 3 can resist pressure from both the outside and inside of the pipeline 1. The increased thickness of the pressure-resistant layer 3 at the socket end 102 can resist additional pressure caused by stress concentration at the joint. The first anti-corrosion layer sprayed on the inside of the pipeline 1 and the second anti-corrosion layer 202 wrapped around the outside of the pressure-resistant layer 3 can prevent corrosion of the inner and outer layers of the pipeline. The rubber sealing ring 6 inside the socket end 102 ensures a seal at the joint, preventing leakage of the medium inside the pipeline.

[0019] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A pressure-resistant and corrosion-resistant prefabricated pipe, comprising a pipe (1), an anti-corrosion layer (2), and a pressure-resistant layer (3), characterized in that: The anti-corrosion layer (2) includes a first anti-corrosion layer (201) and a second anti-corrosion layer (202). The first anti-corrosion layer (201) is fixedly connected to the inner side of the pipe (1), and a pressure-resistant layer (3) is fixedly connected to the outer side of the pipe (1). The second anti-corrosion layer (202) is fixedly connected to the outer side of the pressure-resistant layer (3), and a trapezoidal ring (4) is fixedly connected to the outer side of the second anti-corrosion layer (202).

2. The pressure-resistant and corrosion-resistant prefabricated pipe according to claim 1, characterized in that: The pipe (1) includes a pipe body (101), a socket end (102), and a spigot end (103), and the thickness of the pressure-resistant layer (3) increases at the position near the end face of the socket end (102).

3. The pressure-resistant and corrosion-resistant prefabricated pipeline according to claim 2, characterized in that: An annular groove (5) is provided on the inner side of the socket end (102), and a rubber sealing ring (6) is fixedly connected in the annular groove (5).

4. The pressure-resistant and corrosion-resistant prefabricated pipeline according to claim 1, characterized in that: The pressure-resistant layer (3) is made of fiber-reinforced polymer, the first anti-corrosion layer (201) is made of polymer anti-corrosion coating, and the second anti-corrosion layer (202) is made of anti-corrosion tape.

5. The pressure-resistant and corrosion-resistant prefabricated pipeline according to claim 1, characterized in that: The trapezoidal ring (4) includes a first trapezoidal ring (401) and a second trapezoidal ring (402). The sides of the first trapezoidal ring (401) and the second trapezoidal ring (402) are fixedly connected with rectangular plates (403). The first trapezoidal ring (401) and the second trapezoidal ring (402) are connected by bolts (404) threaded connection.

6. The pressure-resistant and corrosion-resistant prefabricated pipeline according to claim 5, characterized in that: The trapezoidal rings (4) are of several kinds, and the trapezoidal rings (4) are arranged at equal intervals.

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