Fluorine-lined pipeline with high acid corrosion resistance

Abstract

The utility model discloses a fluorine-lined pipeline with strong acid corrosion resistance, which comprises a steel pipe, flange plates are arranged at two ends of the steel pipe, a polytetrafluoroethylene pipe is sleeved on the inner side of the steel pipe, and the steel pipe is connected with the steel pipe through a connecting mechanism convenient for mounting and dismounting the polytetrafluoroethylene pipe. The connecting mechanism is arranged between the polytetrafluoroethylene pipe and the steel pipe, the outer ring and the inner ring of the polytetrafluoroethylene pipe are respectively provided with a reinforcing mechanism for improving the overall strength of the polytetrafluoroethylene pipe, and the outer ring of the polytetrafluoroethylene pipe and the outer ring of the steel pipe are respectively coated with a reinforced acid corrosion prevention coating. According to the polytetrafluoroethylene pipe, the overall strength of the polytetrafluoroethylene pipe can be improved, the acid corrosion resistance of the fluorine-lined pipeline can be improved through the arranged reinforced acid corrosion-resistant coating, then through the structure, the service life of the fluorine-lined pipeline is effectively prolonged, meanwhile, disassembly and assembly of the polytetrafluoroethylene pipe and the steel pipe are facilitated, replacement is facilitated, and meanwhile resource waste is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of fluorine-lined pipes, in particular to a fluorine-lined pipe with strong acid corrosion resistance. Background Art

[0002] Fluorine-lined pipes and accessories enjoy the reputation of "King of Plastics" and have excellent temperature resistance and corrosion resistance. They are ideal equipment for conveying highly corrosive media such as nitric acid, sulfuric acid, hydrofluoric acid, phosgene, chlorine, aqua regia, mixed acid, bromide and other organic solvents. With the continuous development of society and the continuous progress of science, the use of fluorine-lined pipes has become more and more extensive.

[0003] However, when used under conditions of high-temperature media and insufficient fluid flow resulting in a vacuum in the pipe, the following problems exist: if the temperature of the fluid is too high, long-term use will reduce the overall strength of the pipe and soften the entire pipe, or even cause irreversible plastic deformation, so that it must be stopped for a period of time after working for a period of time, greatly reducing its efficiency. In addition, when the fluid flow in the pipe is insufficient, a vacuum phenomenon occurs in the pipe, which will put pressure on the pipe. If it works in such an environment for a long time, the pipe is prone to deformation, thereby greatly reducing the service life of the pipe. Moreover, the polytetrafluoroethylene pipe in the existing technology is generally fixedly connected to the outer steel pipe. Although it is firm, it is difficult to disassemble. Once maintenance or replacement is required, the entire pipe needs to be replaced, which wastes resources.

[0004] Therefore, a fluorine-lined pipe with strong acid corrosion resistance is needed to solve the problems raised in the above background technology. Utility Model Content

[0005] In view of the above problems, the utility model provides a fluorine-lined pipeline with strong acid corrosion resistance.

[0006] The utility model provides the following technical solution: a fluorine-lined pipeline with strong acid corrosion resistance, comprising a steel pipe, flanges at both ends of the steel pipe, a polytetrafluoroethylene tube sleeved on the inner side of the steel pipe, and connected to the steel pipe via a connecting mechanism that facilitates the installation and removal of the polytetrafluoroethylene tube, the outer ring and the inner ring of the polytetrafluoroethylene tube are both provided with a reinforcing mechanism for improving the overall strength thereof, and the outer rings of the polytetrafluoroethylene tube and the steel pipe are both coated with a reinforced acid corrosion resistant coating.

[0007] In a further technical solution, the reinforcing mechanism includes a steel belt and a reinforcing rib mesh, the steel belt is embedded in the outer ring of the polytetrafluoroethylene tube and is arranged in a surrounding type, and the reinforcing rib mesh is embedded in the inner ring of the polytetrafluoroethylene tube.

[0008] In a further technical solution, the connecting mechanism includes two groups of fixing sleeves, and the outer rings at both ends of the polytetrafluoroethylene tube are provided with interference grooves. One end of the two groups of fixing sleeves passes through the steel pipe and the polytetrafluoroethylene tube and respectively interferes with the two groups of interference grooves. Three groups of connecting blocks are provided near the ends of the outer rings of the two groups of fixing sleeves, and three groups of grooves corresponding to the connecting blocks are provided on one side of the two groups of flanges. The connecting blocks and the grooves are connected by bolts.

[0009] In a further technical solution, a sealing groove is provided on one side of one group of the fixing sleeves, and a contact ring adapted to the sealing groove is provided on one side of the other group of the fixing sleeves.

[0010] In a further technical solution, the reinforced acid-corrosion resistant coating is sequentially provided from the inside out with a primer, degreased glass fiber cloth, a first coat of topcoat and a second coat of topcoat.

[0011] The beneficial effects of the utility model are:

[0012] 1. The utility model can improve the overall strength of the polytetrafluoroethylene pipe by the surrounding steel belt and the embedded reinforcing rib net, and further avoid the deformation of the pipe due to pressure through the arrangement, thereby increasing the service life of the pipe.

[0013] 2. The utility model can fix the polytetrafluoroethylene tube to the inner side of the steel pipe by providing two sets of fixing sleeves. Under the action of the provided connecting blocks and bolts, the two sets of fixing sleeves can be fixedly connected to the two sets of flanges respectively, thereby facilitating the installation and fixation of the polytetrafluoroethylene tube. When the polytetrafluoroethylene tube needs to be disassembled, the polytetrafluoroethylene tube can be pulled out by removing multiple sets of bolts and then removing the two sets of fixing sleeves, which facilitates the replacement of the pipeline. Furthermore, the setting facilitates the disassembly and assembly of the polytetrafluoroethylene pipe and the steel pipe, facilitates replacement, and avoids waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a side view of the utility model;

[0016] Figure 3 This is a side sectional view of the utility model;

[0017] Figure 4 This is a cross-sectional view of the end face of the polytetrafluoroethylene tube;

[0018] Figure 5 for Figure 3 A magnified view of part A in FIG;

[0019] Figure 6 for Figure 4 Enlarged view of part B in .

[0020] In the figure: 1. Steel pipe, 2. Flange, 3. Polytetrafluoroethylene tube, 4. Contact groove, 5. Fixing sleeve, 6. Connecting block, 7. Groove, 8. Sealing groove, 9. Contact ring, 10. Steel belt, 11. Reinforcement mesh, 12. Reinforced anti-acid corrosion coating, 13. Primer, 14. Degreased glass fiber cloth, 15. Topcoat. DETAILED DESCRIPTION

[0021] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0022] Example:

[0023] Reference Figures 1-6 A fluorine-lined pipeline with strong acid corrosion resistance includes a steel pipe 1. Flanges 2 are provided at both ends of the steel pipe 1. A polytetrafluoroethylene tube 3 is provided on the inner side of the steel pipe 1 and is connected to the steel pipe 1 through a connecting mechanism that facilitates the installation and disassembly of the polytetrafluoroethylene tube 3. The outer ring and inner ring of the polytetrafluoroethylene tube 3 are provided with a reinforcing mechanism to improve its overall strength. The outer ring of the polytetrafluoroethylene tube 3 and the outer ring of the steel pipe 1 are coated with a reinforced anti-acid corrosion coating.

[0024] Specifically, the connection mechanism provided can facilitate the installation and disassembly between the polytetrafluoroethylene tube 3 and the steel pipe 1, the reinforcement mechanism provided can improve the overall strength of the polytetrafluoroethylene tube 3, and the reinforced anti-acid corrosion coating provided can improve the acid corrosion resistance of the fluorine-lined pipe. Furthermore, the above structure effectively improves the service life of the fluorine-lined pipe. At the same time, it facilitates the disassembly and assembly of the polytetrafluoroethylene pipe 3 and the steel pipe 1, facilitates replacement, and avoids waste of resources.

[0025] Among them, the reinforcement mechanism includes a steel belt 10 and a reinforcing rib net 11. The outer ring of the polytetrafluoroethylene tube 3 is embedded with the steel belt 10 and is arranged in a surrounding type. The inner ring of the polytetrafluoroethylene tube 3 is embedded with the reinforcing rib net 11. The surrounding steel belt 10 and the embedded reinforcing rib net 11 can improve the overall strength of the polytetrafluoroethylene tube 3. Furthermore, through the arrangement, the pipeline can be prevented from being deformed due to pressure, thereby increasing the service life of the pipeline.

[0026] Among them, the connection mechanism includes two sets of fixing sleeves 5, and the outer rings of both ends of the polytetrafluoroethylene tube 3 are provided with a conflict groove 4. One end of the two sets of fixing sleeves 5 passes through between the steel pipe 1 and the polytetrafluoroethylene tube 3, and conflicts with the two sets of conflict grooves 4 respectively. The outer rings of the two sets of fixing sleeves 5 are provided with three sets of connecting blocks 6 near the end. One side of the two sets of flanges 2 is provided with three sets of grooves 7 that are compatible with the connecting blocks 6. The connecting blocks 6 and the grooves 7 are connected by bolts. By setting the two sets of fixing sleeves 5, the polytetrafluoroethylene can be The tube 3 is fixed to the inner side of the steel pipe 1, and with the help of the provided connecting block 6 and bolts, the two sets of fixing sleeves 5 can be fixedly connected to the two sets of flanges 2 respectively, so as to facilitate the installation and fixation of the polytetrafluoroethylene tube 3. When the polytetrafluoroethylene tube 3 needs to be disassembled, the polytetrafluoroethylene tube 3 can be pulled out by removing multiple sets of bolts and then removing the two sets of fixing sleeves 5, which facilitates the replacement of the pipeline. Furthermore, the setting facilitates the disassembly and assembly of the polytetrafluoroethylene pipe 3 and the steel pipe 1, facilitates replacement, and avoids waste of resources.

[0027] Among them, a sealing groove 8 is provided on one side of one group of fixing sleeves 5, and a contact ring 9 adapted to the sealing groove 8 is provided on one side of the other group of fixing sleeves 5. The sealing groove 8 and the contact ring 9 can improve the sealing performance of the connection between the two groups of fluorine-lined pipes.

[0028] Among them, the reinforced anti-acid corrosion coating is arranged from the inside to the outside in sequence as a primer 13, a degreased glass fiber cloth 14, a first coat of topcoat 15 and a second coat of topcoat 15. By setting the primer 13, the degreased glass fiber cloth 14, the first coat of topcoat 15 and the second coat of topcoat 15, the acid corrosion resistance of the pipeline can be greatly improved.

[0029] Working principle: First, pass the polytetrafluoroethylene tube 3 through the inner side of the steel pipe 1, and then fix the polytetrafluoroethylene tube 3 to the inner side of the steel pipe 1 through two sets of fixing sleeves 5, and then with the action of the provided connecting blocks 6 and bolts, the two sets of fixing sleeves 5 can be fixedly connected to the two sets of flanges 2 respectively, so as to facilitate the installation and fixation of the polytetrafluoroethylene tube 3. When the polytetrafluoroethylene tube 3 needs to be disassembled, the polytetrafluoroethylene tube 3 can be pulled out by removing multiple sets of bolts and then removing the two sets of fixing sleeves 5, so as to facilitate the replacement of the pipeline. The surrounding steel belt 10 and the embedded reinforcing rib mesh 11 can improve the overall strength of the polytetrafluoroethylene tube 3, and can avoid the deformation of the pipeline due to pressure. The provided primer 13, degreased glass fiber cloth 14, first coat of topcoat 15 and second coat of topcoat 15 can greatly improve the acid corrosion resistance of the pipeline, effectively extend the service life of the fluorine-lined pipeline, and then complete the entire operation process.

[0030] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0031] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fluorine-lined pipe with strong acid corrosion resistance, comprising a steel pipe, characterized in that: Both ends of the steel pipe are provided with flanges, the inner side of the steel pipe is provided with a polytetrafluoroethylene tube, and is connected to the steel pipe through a connecting mechanism that facilitates the installation and removal of the polytetrafluoroethylene tube. The outer ring and inner ring of the polytetrafluoroethylene tube are provided with a reinforcing mechanism to improve its overall strength, and the outer ring of the polytetrafluoroethylene tube and the steel pipe are coated with a reinforced anti-acid corrosion coating.

2. The fluorine-lined pipe with strong acid corrosion resistance according to claim 1, characterized in that: The reinforcing mechanism includes a steel belt and a reinforcing rib net. The steel belt is embedded in the outer ring of the polytetrafluoroethylene tube and is arranged in a surrounding type. The reinforcing rib net is embedded in the inner ring of the polytetrafluoroethylene tube.

3. The fluorine-lined pipe with strong acid corrosion resistance according to claim 2, characterized in that: The connecting mechanism includes two groups of fixing sleeves, and the outer rings at both ends of the polytetrafluoroethylene tube are provided with interference grooves. One end of the two groups of fixing sleeves passes through the steel tube and the polytetrafluoroethylene tube and respectively interferes with the two groups of interference grooves. Three groups of connecting blocks are provided near the ends of the outer rings of the two groups of fixing sleeves, and three groups of grooves corresponding to the connecting blocks are provided on one side of the two groups of flanges. The connecting blocks and the grooves are connected by bolts.

4. The fluorine-lined pipe with strong acid corrosion resistance according to claim 3, characterized in that: One side of one group of the fixing sleeves is provided with a sealing groove, and one side of the other group of the fixing sleeves is provided with a contact ring matched with the sealing groove.

5. The fluorine-lined pipe with strong acid corrosion resistance according to claim 1, characterized in that: The reinforced acid-corrosion resistant coating is sequentially provided with a primer, degreased glass fiber cloth, a first coat of topcoat and a second coat of topcoat from the inside out.

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