3PE anti-corrosion steel pipe

Abstract

The utility model belongs to the technical field of 3PE anti-corrosion steel pipes, and discloses a 3PE anti-corrosion steel pipe which comprises a pipe body, a protective sleeve is arranged on the outer side of the pipe body in a sleeved mode, a temperature-sensitive color-changing plate is arranged on the protective sleeve, the temperature-sensitive color-changing plate penetrates through the protective sleeve and is tightly attached to the outer wall of the pipe body, and a pressure-bearing ring assembly is arranged on the outer side of the protective sleeve. The high-temperature-resistant protective layer of the protective sleeve is made of a high-temperature-resistant material and can resist the high temperature of 200-300 DEG C, the efficient heat insulation layer is made of a high-heat-insulation material, the heat conduction efficiency is greatly reduced, the high-temperature-resistant bonding layer is tightly combined with the 3PE anti-corrosion layer through a high-temperature-resistant bonding agent, and the temperature-sensitive color-changing plate is made of a high- Stable color change can be achieved within a certain temperature range, the surface temperature of the pipeline is visually reflected through the temperature-color corresponding identification on the surface, and workers can rapidly judge the temperature state of the pipeline visually without the help of complex equipment and find potential safety hazards in time.

Description

Technical Field

[0001] This utility model belongs to the field of 3PE anti-corrosion steel pipe technology, specifically a 3PE anti-corrosion steel pipe. Background Technology

[0002] 3PE anti-corrosion steel pipe refers to a three-layer polyethylene coating external anti-corrosion steel pipe. It is a new type of anti-corrosion steel pipe coating that combines the 2PE anti-corrosion layer of Europe with the epoxy powder anti-corrosion steel pipe coating widely used in North America. In the energy, chemical and other industries, 3PE anti-corrosion steel pipe is widely used in oil and gas transportation, heat transmission and other fields due to its excellent anti-corrosion performance, which effectively isolates the steel pipe from the corrosion of water, oxygen and chemical media.

[0003] However, in practical applications, traditional 3PE anti-corrosion steel pipes still face many challenges. When transporting high-temperature media, the 3PE anti-corrosion layer itself has poor thermal insulation performance, and heat is easily lost to the outside. This not only causes the medium temperature to drop and affects the transportation efficiency, but may also cause burns or create safety hazards to the surrounding environment due to excessively high pipe surface temperature. In addition, existing technologies lack real-time and intuitive monitoring methods for abnormal pipe temperature, and cannot detect changes in pipe temperature caused by problems such as damage to the anti-corrosion layer and leakage of media in a timely manner, making it difficult to provide effective early warning for the safe operation of pipelines.

[0004] Therefore, a 3PE anti-corrosion steel pipe is proposed to address the above problems. Utility Model Content

[0005] To address the problems mentioned in the background section, this utility model provides a 3PE anti-corrosion steel pipe, which has the advantages of significantly improved thermal insulation performance and intuitive and convenient temperature monitoring.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a 3PE anti-corrosion steel pipe, comprising a pipe body, a protective sleeve fitted on the outer side of the pipe body, a temperature-sensitive color-changing plate provided on the protective sleeve, the temperature-sensitive color-changing plate penetrating the protective sleeve and closely adhering to the outer wall of the pipe body, and a pressure-bearing ring assembly provided on the outer side of the protective sleeve;

[0007] The protective sleeve is composed of a high-temperature resistant adhesive layer, a high-efficiency heat insulation layer, and a high-temperature resistant protective layer arranged sequentially from the inside to the outside.

[0008] The thermosensitive color-changing plate is composed of an adhesive layer, a thermally conductive substrate, a thermosensitive color-changing layer, and a wear-resistant coating arranged sequentially from the inside to the outside; the adhesive layer is located on the outer wall of the tube.

[0009] Preferably, the pressure-bearing ring assembly includes a circular ring disposed on the outside of the protective sleeve, and a polygonal ring is fixedly connected to the outer wall of the circular ring, with a connecting rod connecting adjacent polygonal rings.

[0010] Preferably, the thermosensitive color-changing plate is provided with fixing ears at both ends, and fixing bolts are provided on the fixing ears, with the fixing bolts passing through the fixing ears to connect the protective sleeve.

[0011] Preferably, a through groove is provided on the protective sleeve at the position corresponding to the temperature-sensitive color-changing plate, and the temperature-sensitive color-changing plate passes through the through groove.

[0012] Preferably, the two ends of the through groove are provided with positioning grooves that match the fixing ears, and the fixing ears are located in the positioning grooves.

[0013] Preferably, the inner wall of the positioning groove and the fixing ear are respectively provided with threaded grooves and through holes at positions corresponding to the fixing bolts, and the bolt of the fixing bolt passes through the through hole and is threadedly connected to the threaded groove.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. This utility model features a protective sleeve, a high-temperature resistant protective layer made of high-temperature resistant material that can withstand temperatures of 200-300℃, a high-efficiency heat insulation layer made of high-insulation material that significantly reduces heat transfer efficiency, and a high-temperature resistant adhesive layer that is tightly bonded to the 3PE anti-corrosion layer with a high-temperature resistant adhesive. This allows the outer surface temperature of the pipe to be lower than that of traditional 3PE anti-corrosion steel pipes, effectively reducing heat loss, maintaining stable medium temperature, and making it suitable for high-temperature medium transportation scenarios, thus improving energy transportation efficiency.

[0016] 2. This utility model, by setting up a temperature-sensitive color-changing plate and using a high-molecular polymer thermosensitive material, can achieve stable color changes within a certain temperature range. Through the temperature-color correspondence markings on the surface, it can intuitively reflect the surface temperature of the pipeline. When the pipeline experiences abnormal temperature due to reasons such as damage to the anti-corrosion layer or media leakage, the temperature-sensitive color-changing plate quickly changes color. Workers can quickly judge the pipeline temperature status visually without the need for complex equipment, promptly detect potential safety hazards, and achieve real-time, visual monitoring of the pipeline's operating status, providing strong protection for the safe operation of the pipeline. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the protective sleeve of this utility model;

[0019] Figure 3 This is a schematic diagram of the installation structure of the thermochromic plate of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the thermosensitive color-changing plate of this utility model;

[0021] Figure 5This is a schematic diagram of the pressure ring assembly of this utility model.

[0022] In the diagram: 1. Pipe body;

[0023] 2. Protective sleeve; 201. High-temperature resistant adhesive layer; 202. High-efficiency heat insulation layer; 203. High-temperature resistant protective layer;

[0024] 3. Thermosensitive color-changing plate; 301. Adhesive layer; 302. Thermally conductive substrate; 303. Thermosensitive color-changing layer; 304. Wear-resistant coating;

[0025] 4. Pressure ring assembly; 401. Circular ring; 402. Polygonal ring; 403. Connecting rod;

[0026] 5. Fixing lug; 6. Fixing bolt; 7. Through groove; 8. Positioning groove; 9. Threaded groove; 10. Through hole. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] like Figures 1 to 5 As shown, this utility model provides a 3PE anti-corrosion steel pipe, including a pipe body 1, a protective sleeve 2 sleeved on the outside of the pipe body 1, a temperature-sensitive color-changing plate 3 on the protective sleeve 2, the temperature-sensitive color-changing plate 3 penetrating the protective sleeve 2 and closely attached to the outer wall of the pipe body 1, and a pressure-bearing ring assembly 4 on the outside of the protective sleeve 2.

[0029] The protective sleeve 2 consists of a high-temperature resistant adhesive layer 201, a high-efficiency heat insulation layer 202, and a high-temperature resistant protective layer 203 arranged sequentially from the inside out. The high-temperature resistant protective layer 203 can be made of silicone rubber coated fiberglass cloth or ceramicized silicone rubber composite material. Silicone rubber can withstand temperatures up to 200-300℃, and ceramicized silicone rubber forms a ceramic layer at high temperatures, blocking flames and heat to meet fire protection standards. Fiberglass cloth enhances structural strength and prevents the coating from cracking and peeling off. The high-efficiency heat insulation layer 202 can be made of aerogel insulation felt or vacuum insulation board. Aerogel felt is wound or vacuum board is spliced, and the outer layer is sealed with aluminum foil tape to prevent moisture, which greatly reduces the heat conduction efficiency and makes the outer surface temperature of the pipeline 30-50℃ lower than that of traditional insulation layers (e.g., when the medium temperature is 150℃, the outer surface temperature can be controlled below 50℃). The high-temperature resistant adhesive layer 201 can be made of silicone modified epoxy resin or phenolic resin adhesive, which maintains adhesion in high-temperature environments and ensures that the heat insulation layer and the 3PE anti-corrosion layer are tightly bonded.

[0030] The thermosensitive color-changing plate 3 is composed of an adhesive layer 301, a thermally conductive substrate 302, a thermosensitive color-changing layer 303, and a wear-resistant coating 304 arranged sequentially from the inside to the outside. The adhesive layer 301 is disposed on the outer wall of the pipe body 1. The adhesive layer 301 can be made of silicone glue or acrylic glue, which is resistant to high temperature and ensures the bonding strength under long-term service. The thermally conductive substrate 302 is made of metal substrate (such as aluminum-magnesium alloy) or graphite thermal conductive film to ensure that the heat of the pipe is quickly conducted to the color-changing layer. The thermosensitive color-changing layer 303 can be designed with gradient color bands to correspond to different temperature ranges. The wear-resistant coating 304 can be made of polyurethane or epoxy resin to prevent dirt and stones from rubbing and damaging the color-changing layer.

[0031] Specifically, the pressure-bearing ring assembly 4 includes a circular ring 401 located on the outside of the protective sleeve 2. A polygonal ring 402 is fixedly connected to the outer wall of the circular ring 401. A connecting rod 403 connects adjacent polygonal rings 402. The circular ring 401 is made of Q345B steel or aluminum alloy, and its inner diameter matches the outer diameter of the protective sleeve. The ring structure has a large contact area with the protective sleeve, which can evenly transfer the external load to the entire pipeline and avoid local stress concentration. When the polygonal vertices of the polygonal ring 402 come into contact with the surrounding soil or structure, a "tooth-like" interlocking effect is formed, which improves the anti-slip ability. Adjacent polygonal rings 402 are connected by circumferentially distributed connecting rods 403, which can construct a "ring-rod" cooperative force-bearing system, which significantly improves the integrity, stability and deformation resistance of the pipeline system.

[0032] Furthermore, the thermosensitive color-changing plate 3 is provided with fixing ears 5 at both ends, and fixing bolts 6 are provided on the fixing ears 5. The fixing bolts 6 pass through the fixing ears 5 and connect to the protective sleeve 2.

[0033] Furthermore, a through groove 7 is provided on the protective sleeve 2 at the position corresponding to the temperature-sensitive color-changing plate 3, through which the temperature-sensitive color-changing plate 3 passes.

[0034] It is worth noting that positioning grooves 8 that match the fixing ears 5 are provided at both ends of the through groove 7, and the fixing ears 5 are located in the positioning grooves 8.

[0035] It is worth noting that threaded grooves 9 and through holes 10 are respectively provided on the inner wall of the positioning groove 8 and on the fixing ear 5 at the positions corresponding to the fixing bolt 6. The screw of the fixing bolt 6 passes through the through hole 10 and is threaded to the threaded groove 9.

[0036] Working principle and process: The high-temperature resistant protective layer 203 of the protective sleeve 2 is made of high-temperature resistant material and can withstand high temperatures of 200-300℃. The high-efficiency heat insulation layer 202 is made of high heat insulation material, which greatly reduces the heat conduction efficiency. The high-temperature resistant adhesive layer 201 is tightly bonded to the pipe body 1 through a high-temperature resistant adhesive, which can reduce the outer surface temperature of the pipe body 1 compared with traditional 3PE anti-corrosion steel pipes, effectively reduce heat loss, maintain the stability of medium temperature, and is suitable for high-temperature medium transportation scenarios, improving energy transmission efficiency. The temperature-sensitive color-changing plate 3 is made of high-molecular polymer thermosensitive material, which can achieve stable color change within a certain temperature range. The temperature-color correspondence mark on the surface directly reflects the surface temperature of the pipeline. When the temperature of the pipeline is abnormal due to damage to the anti-corrosion layer, medium leakage, etc., the temperature-sensitive color-changing plate 3 quickly changes color. The staff can quickly judge the temperature status of the pipeline by visual inspection without the need for complicated equipment, and promptly detect safety hazards. It realizes real-time and visual monitoring of the pipeline operation status, and provides strong protection for the safe operation of the pipeline.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A 3PE anti-corrosion steel pipe, comprising a pipe body (1), characterized in that: The outer side of the tube body (1) is fitted with a protective sleeve (2), and a temperature-sensitive color-changing plate (3) is provided on the protective sleeve (2). The temperature-sensitive color-changing plate (3) penetrates the protective sleeve (2) and is closely attached to the outer wall of the tube body (1). A pressure-bearing ring assembly (4) is provided on the outer side of the protective sleeve (2). The protective sleeve (2) is composed of a high-temperature resistant adhesive layer (201), a high-efficiency heat insulation layer (202), and a high-temperature resistant protective layer (203) arranged sequentially from the inside to the outside; The thermosensitive color-changing plate (3) is composed of an adhesive layer (301), a thermally conductive substrate (302), a thermosensitive color-changing layer (303), and a wear-resistant coating (304) arranged sequentially from the inside to the outside; the adhesive layer (301) is disposed on the outer wall of the tube body (1).

2. The 3PE anti-corrosion steel pipe according to claim 1, characterized in that: The pressure-bearing ring assembly (4) includes a circular ring (401) disposed on the outside of the protective sleeve (2), and a polygonal ring (402) is fixedly connected to the outer wall of the circular ring (401), and a connecting rod (403) is connected between adjacent polygonal rings (402).

3. The 3PE anti-corrosion steel pipe according to claim 1, characterized in that: The thermosensitive color-changing plate (3) is provided with fixing ears (5) at both ends, and fixing bolts (6) are provided on the fixing ears (5). The fixing bolts (6) pass through the fixing ears (5) and connect to the protective sleeve (2).

4. The 3PE anti-corrosion steel pipe according to claim 3, characterized in that: A through groove (7) is provided on the protective sleeve (2) at the position corresponding to the temperature-sensitive color-changing plate (3), and the temperature-sensitive color-changing plate (3) passes through the through groove (7).

5. The 3PE anti-corrosion steel pipe according to claim 4, characterized in that: The through groove (7) has positioning grooves (8) at both ends that match the fixing ears (5), and the fixing ears (5) are located in the positioning grooves (8).

6. The 3PE anti-corrosion steel pipe according to claim 5, characterized in that: The inner wall of the positioning groove (8) and the fixing ear (5) are respectively provided with threaded grooves (9) and through holes (10) at the positions corresponding to the fixing bolts (6). The screw of the fixing bolts (6) passes through the through holes (10) and is threadedly connected to the threaded grooves (9).

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