Chemical pipeline with thermal insulation paint coating structure

Abstract

The utility model relates to the related technical field of pipelines, in particular to a chemical pipeline with a heat insulation paint coating structure, which comprises a plastic inner pipe, a protection mechanism is arranged outside the plastic inner pipe, and a connecting mechanism is arranged outside the plastic inner pipe. According to the chemical pipeline with the heat preservation and insulation paint coating structure, protection of the interior and the exterior of the pipeline is enhanced, the situation that the pipeline is corroded by conveyed liquid or interfered by external factors and cannot work normally is prevented, connection between the pipelines is also enhanced, and the conveyed liquid is prevented from flowing out of the pipeline.

Description

Technical Field

[0001] This utility model relates to the field of pipeline-related technology, and in particular to a chemical pipeline with a thermal insulation coating structure. Background Technology

[0002] Chemical pipelines are the "blood vessels" of chemical plants. Their scientific design and management directly affect production efficiency, safety, and environmental compliance. Chemical production involves various fluid media, such as raw materials, intermediates, products, solvents, and catalysts, which need to be transported from one piece of equipment to another through pipelines to achieve continuous production. Chemical production has complex processes, and the layout and connection of pipelines determine the flow direction and path of fluids, thereby ensuring that each production link can proceed in an orderly manner according to design requirements.

[0003] However, most existing chemical pipelines with thermal insulation coatings have a short service life, are easily corroded by the liquids transported inside, are easily damaged by external factors, and have weak connections between pipes, causing the transported liquid to leak out. Utility Model Content

[0004] The purpose of this utility model is to provide a chemical pipeline with a thermal insulation coating structure to solve the problems mentioned in the background art. Most of the existing thermal insulation coating structures of chemical pipelines have a short service life, are easily corroded by the liquid transported in the pipeline, are easily damaged by the outside, and have weak connections between pipelines, resulting in the leakage of transported liquid.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a chemical pipeline with a thermal insulation coating structure, comprising a plastic inner tube, a protective mechanism provided on the outside of the plastic inner tube, and a connecting mechanism provided on the outside of the plastic inner tube;

[0006] The protective mechanism includes an inner adhesive layer, a corrosion-resistant layer, an outer adhesive layer, a waterproof layer, a reinforcing layer, a plastic outer tube, and a thermal insulation coating. The inner wall of the plastic inner tube is fitted with the inner adhesive layer, and the inner wall of the inner adhesive layer is fixedly fitted with the corrosion-resistant layer. The outer wall of the plastic inner tube is fitted with the outer adhesive layer, and the outer wall of the outer adhesive layer is fitted with the waterproof layer. The outside of the waterproof layer is fitted with the reinforcing layer, and the outside of the reinforcing layer is fitted with the plastic outer tube. The outer wall of the plastic outer tube is fitted with the thermal insulation coating.

[0007] Preferably, the connecting mechanism includes a flange, threaded groove, bolts, a first sealing ring, a first protective outer sleeve, a second sealing ring, a second protective outer sleeve, and a filter screen. The flange is fixedly installed on the outside of the thermal insulation coating. The outer wall of the flange has a threaded groove. Bolts are installed on the outside of the flange. The first sealing ring is fixedly installed on the outer wall of the flange. The first protective outer sleeve is installed on the outer wall of the first sealing ring. The second sealing ring is installed on the outer wall of the flange. The second protective outer sleeve is fixedly installed on the outer wall of the second sealing ring. A filter screen is installed on the inner wall of the flange.

[0008] Preferably, the inner adhesive layer is made of modified epoxy phenolic coating, and the corrosion-resistant layer is made of FEP.

[0009] Preferably, the waterproof layer is made of SBS modified bitumen membrane, and the reinforcing layer is made of HDPE double-wave internal rib reinforced spiral wound pipe.

[0010] Preferably, the outer wall of the plastic outer tube is coated with a layer of thermal insulation coating, and the thermal insulation coating material is ZS-waterproof corrosion-resistant thermal insulation coating.

[0011] Preferably, the flange is provided with two sets, and the threaded grooves are equally spaced on the outer wall of the flange.

[0012] Preferably, the bolts are evenly spaced on the outside of the flange, and the outer wall size of the first sealing ring matches the inner wall size of the first protective sleeve.

[0013] Preferably, the outer wall dimensions of the second sealing ring match the inner wall dimensions of the second protective sleeve.

[0014] Compared with the prior art, the beneficial effects of this utility model are: the chemical pipeline with a thermal insulation coating structure strengthens the protection inside and outside the pipeline, preventing the pipeline from being corroded by the transported liquid or interfered with by external factors and unable to work normally. The connection between pipelines is also strengthened to prevent the transported liquid from flowing out. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall appearance and structure of the present utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the present invention, showing the combination of the inner adhesive layer and the corrosion-resistant layer.

[0017] Figure 3 This is a schematic diagram of the structure of the outer adhesive layer and the waterproof layer used in conjunction with this utility model;

[0018] Figure 4This is a schematic diagram of the structure of the flange and bolts used in this utility model.

[0019] Figure 5 This is a schematic diagram of the structure of the first sealing ring and the first protective jacket used in conjunction with this utility model.

[0020] In the diagram: 1. Inner plastic tube; 2. Protective mechanism; 21. Inner adhesive layer; 22. Corrosion-resistant layer; 23. Outer adhesive layer; 24. Waterproof layer; 25. Reinforcing layer; 26. Outer plastic tube; 27. Thermal insulation coating; 3. Connecting mechanism; 31. Flange; 32. Threaded groove; 33. Bolt; 34. First sealing ring; 35. First protective outer sleeve; 36. Second sealing ring; 37. Second protective outer sleeve; 38. Filter screen. Detailed Implementation

[0021] 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.

[0022] Please see Figure 1-5 This utility model provides a technical solution: a chemical pipeline with a thermal insulation coating structure, including a plastic inner tube 1, a protective mechanism 2 provided on the outside of the plastic inner tube 1, and a connecting mechanism 3 provided on the outside of the plastic inner tube 1.

[0023] The protective mechanism 2 includes an inner adhesive layer 21, a corrosion-resistant layer 22, an outer adhesive layer 23, a waterproof layer 24, a reinforcing layer 25, a plastic outer tube 26, and a thermal insulation coating 27. The inner wall of the plastic inner tube 1 is fitted with the inner adhesive layer 21, and the inner wall of the inner adhesive layer 21 is fixedly fitted with the corrosion-resistant layer 22. The outer wall of the plastic inner tube 1 is fitted with the outer adhesive layer 23, and the outer wall of the outer adhesive layer 23 is fitted with the waterproof layer 24. The outside of the waterproof layer 24 is fitted with the reinforcing layer 25, and the outside of the reinforcing layer 25 is fitted with the plastic outer tube 26. The outer wall of pipe 26 is coated with a thermal insulation coating 27. Through the arrangement of an inner adhesive layer 21, a corrosion-resistant layer 22, an outer adhesive layer 23, a waterproof layer 24, a reinforcing layer 25, a plastic outer pipe 26, and the thermal insulation coating 27, it is ensured that the plastic inner pipe 1 will not be corroded by the internally transported liquid and will not be damaged by external factors. An inner adhesive layer 21 is first applied to the inside of the plastic inner pipe 1, followed by a corrosion-resistant layer 22. The inner adhesive layer 21 ensures a stronger connection between the plastic inner pipe 1 and the corrosion-resistant layer 22. The inner plastic pipe 1 is sturdy, and the corrosion-resistant layer 22 ensures that it will not be corroded by the liquid transported inside. An external adhesive layer 23 is also applied to the outer wall of the inner plastic pipe 1, followed by a waterproof layer 24. This waterproof layer 24 is firmly attached to the inner plastic pipe 1 and prevents the inner plastic pipe 1 from being soaked by rainwater, which would soften the pipe and make it more susceptible to corrosion by the liquid inside. A reinforcing layer 25 is set outside the waterproof layer 24 to enhance the pipe's ability to withstand internal pressure and prevent the inner plastic pipe 1 from deforming or breaking due to high pressure. A plastic outer pipe 26 is then laid on the outside. The plastic outer pipe 26 has high toughness and impact resistance and can resist physical damage such as external pressure, soil settlement, stone crushing, and construction machinery collisions, protecting the internal pipes or cables from damage. The plastic outer pipe 26 is also easy to transport, cut, and connect, reducing construction costs. A heat-insulating coating 27 is applied to the surface of the plastic outer pipe 26 to reduce the temperature of the outer wall of the high-temperature pipe to a safe threshold for human contact, preventing burns to employees when they come into contact with the pipe.

[0024] Furthermore, the connecting mechanism 3 includes a flange 31, a threaded groove 32, bolts 33, a first sealing ring 34, a first protective sleeve 35, a second sealing ring 36, a second protective sleeve 37, and a filter screen 38. The flange 31 is fixedly installed on the outside of the thermal insulation coating 27. The outer wall of the flange 31 has a threaded groove 32. Bolts 33 are installed on the outside of the flange 31. The first sealing ring 34 is fixedly installed on the outer wall of the flange 31. The first protective sleeve 35 is installed on the outer wall of the first sealing ring 34. The second sealing ring 36 is installed on the outer wall of the flange 31. The second protective sleeve 37 is fixedly installed on the outer wall of the second sealing ring 36. A filter screen 38 is installed on the inner wall of the flange 31. The connection mechanism 3 connects the flange 31, threaded groove 32, bolts 33, first sealing ring 34, and first protective sleeve 37. 5. The arrangement of the second sealing ring 36, the second protective sleeve 37, and the filter screen 38 allows for easy, quick, and stable connection between pipes. First, the two flanges 31 are placed on the pipes to be connected, and then the two flanges 31 are connected with bolts 33, thus connecting the two pipes. In this process, the first sealing ring 34 prevents the liquid in the pipe from flowing out from the upper and lower positions of the flange 31, the first protective sleeve 35 protects the first sealing ring 34 from external damage, the second sealing ring 36 prevents the liquid in the pipe from flowing out between the two flanges 31, and the second protective sleeve 37 protects the second sealing ring 36 from external damage. There is also a filter screen 38 between the two flanges 31 to filter out impurities in the liquid.

[0025] Furthermore, the inner adhesive layer 21 is made of modified epoxy phenolic coating, and the corrosion-resistant layer 22 is made of FEP. The inner adhesive layer 21 makes the connection between the plastic inner tube 1 and the corrosion-resistant layer 22 tighter.

[0026] Furthermore, the waterproof layer 24 is made of SBS modified bitumen membrane, and the reinforcing layer 25 is made of HDPE double-wave internal rib reinforced spiral wound pipe. By setting the reinforcing layer 25, the pipe's ability to withstand internal pressure is improved, preventing the plastic inner pipe 1 from deforming or cracking due to high pressure.

[0027] Furthermore, the outer wall of the plastic outer pipe 26 is coated with a layer of thermal insulation coating 27. The thermal insulation coating 27 is made of ZS-111 waterproof and corrosion-resistant thermal insulation coating. With the thermal insulation coating 27, the surface temperature of the pipe will not be too high even when exposed to the sun, and people can touch it directly.

[0028] Furthermore, the flange 31 is provided with two sets of threaded grooves 32, which are equally spaced on the outer wall of the flange 31. The flange 31 allows for connection between pipes, and the flange 31 is easy to disassemble and assemble, making the installation and disassembly process extremely convenient.

[0029] Furthermore, the bolts 33 are evenly distributed on the outside of the flange 31, and the outer wall size of the first sealing ring 34 matches the inner wall size of the first protective sleeve 35. The setting of the first sealing ring 34 prevents the liquid in the pipeline from flowing out from the top and bottom of the flange 31.

[0030] Furthermore, the outer wall dimensions of the second sealing ring 36 match the inner wall dimensions of the second protective sleeve 37. The second sealing ring 36 fills the connection between the two flanges 31, preventing liquid in the pipeline from flowing out between the two flanges 31.

[0031] Working Principle: An inner adhesive layer 21 is first applied to the inside of the inner plastic tube 1, followed by a corrosion-resistant layer 22. The inner adhesive layer 21 ensures a stronger connection between the inner plastic tube 1 and the corrosion-resistant layer 22, while the corrosion-resistant layer 22 prevents the inner plastic tube 1 from being corroded by the liquid being transported inside. An outer adhesive layer 23 is also applied to the outer wall of the inner plastic tube 1, followed by a waterproof layer 24. This waterproof layer 24 is firmly attached to the inner plastic tube 1, preventing it from being soaked by rainwater, which would soften the pipe and make it more susceptible to corrosion by the internal liquid. A reinforcing layer 25 is then installed outside the waterproof layer 24 to enhance the pipe's ability to withstand internal pressure, preventing deformation or cracking of the inner plastic tube 1 due to high pressure. Finally, an outer plastic tube 26 is laid on top. The outer plastic tube 26 has high toughness and impact resistance, resisting physical damage from external pressure, soil settlement, stone crushing, and construction machinery collisions, protecting the internal pipes or cables. The cable is protected from damage, and the plastic outer tube 26 is easy to transport, cut, and connect, reducing construction costs. A layer of heat-insulating coating 27 is applied to the surface of the plastic outer tube 26 to reduce the temperature of the outer wall of the high-temperature pipe to a safe threshold for human contact, preventing burns to employees when they come into contact with the pipe. If pipes need to be connected, first put two flanges 31 on the pipes to be connected, and then connect the two flanges 31 with bolts 33. In this way, the two pipes to be connected are connected. The first sealing ring 34 prevents the liquid in the pipe from flowing out from the upper and lower positions of the flange 31. The first protective sleeve 35 protects the first sealing ring 34 from being damaged by the outside. The second sealing ring 36 prevents the liquid in the pipe from flowing out between the two flanges 31. The second protective sleeve 37 protects the second sealing ring 36 from being damaged by the outside. There is also a filter screen 38 between the two flanges 31 to filter out impurities in the liquid.

[0032] 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 chemical pipeline with a thermal insulation coating structure, comprising a plastic inner tube (1), characterized in that: The plastic inner tube (1) is provided with a protective mechanism (2) on the outside, and the plastic inner tube (1) is provided with a connecting mechanism (3) on the outside; The protective mechanism (2) includes an inner adhesive layer (21), a corrosion-resistant layer (22), an outer adhesive layer (23), a waterproof layer (24), a reinforcing layer (25), a plastic outer tube (26), and a thermal insulation coating (27). The inner wall of the plastic inner tube (1) is provided with an inner adhesive layer (21), the inner wall of the inner adhesive layer (21) is fixedly provided with a corrosion-resistant layer (22), the outer wall of the plastic inner tube (1) is provided with an outer adhesive layer (23), the outer wall of the outer adhesive layer (23) is provided with a waterproof layer (24), the outer side of the waterproof layer (24) is provided with a reinforcing layer (25), the outer side of the reinforcing layer (25) is provided with a plastic outer tube (26), and the outer wall of the plastic outer tube (26) is provided with a thermal insulation coating (27).

2. The chemical pipeline with a thermal insulation coating structure according to claim 1, characterized in that: The connecting mechanism (3) includes a flange (31), a threaded groove (32), bolts (33), a first sealing ring (34), a first protective sleeve (35), a second sealing ring (36), a second protective sleeve (37), and a filter screen (38). The flange (31) is fixedly installed on the outside of the thermal insulation coating (27). The outer wall of the flange (31) is provided with a threaded groove (32). Bolts (33) are installed on the outside of the flange (31). The first sealing ring (34) is fixedly installed on the outer wall of the flange (31). The first protective sleeve (35) is installed on the outer wall of the first sealing ring (34). The second sealing ring (36) is installed on the outer wall of the flange (31). The second protective sleeve (37) is fixedly installed on the outer wall of the second sealing ring (36). A filter screen (38) is installed on the inner wall of the flange (31).

3. The chemical pipeline with a thermal insulation coating structure according to claim 1, characterized in that: The inner adhesive layer (21) is made of modified epoxy phenolic coating, and the corrosion resistant layer (22) is made of FEP.

4. The chemical pipeline with a thermal insulation coating structure according to claim 1, characterized in that: The waterproof layer (24) is made of SBS modified bitumen roll material, and the reinforcing layer (25) is made of HDPE double-wave internal rib reinforced spiral pipe.

5. The chemical pipeline with a thermal insulation coating structure according to claim 1, characterized in that: The outer wall of the plastic outer tube (26) is coated with a layer of heat-insulating coating (27), and the heat-insulating coating (27) is made of ZS-111 waterproof corrosion-resistant heat-insulating coating.

6. The chemical pipeline with a thermal insulation coating structure according to claim 2, characterized in that: The flange (31) is provided with two sets of threaded grooves (32) which are equally spaced on the outer wall of the flange (31).

7. The chemical pipeline with a thermal insulation coating structure according to claim 2, characterized in that: The bolts (33) are evenly spaced on the outside of the flange (31), and the outer wall size of the first sealing ring (34) matches the inner wall size of the first protective sleeve (35).

8. The chemical pipeline with a thermal insulation coating structure according to claim 2, characterized in that: The outer wall dimensions of the second sealing ring (36) match the inner wall dimensions of the second protective jacket (37), and a filter screen (38) is provided between the two sets of flanges (31).

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