Anti-corrosion coating device for inner wall of heating furnace coil pipe

Abstract

The utility model relates to the technical field of oil field oil gas heating furnace equipment, and discloses a heating furnace coil pipe inner wall anti-corrosion coating device which comprises a first charging barrel and a second charging barrel, an upper threaded connector is fixedly installed on the upper portion of the first charging barrel and the upper portion of the second charging barrel, and the end of the upper threaded connector is in threaded connection with a first material valve and a second material valve. A first paint valve and a first air valve are fixedly installed on the lower portion of the first material barrel, and a second paint valve and a second air valve are fixedly installed on the lower portion of the second material barrel. Brushing work of the inner surface of the coil pipe is completed through the rubber ball, a traditional brushing mode is very prone to being interfered by the complex inner surface shape of the coil pipe, the thickness of a coating is uneven, the anti-corrosion effect is affected, and coating waste is caused, however, the device perfectly solves the problems, the rubber ball makes rolling contact in the coil pipe and is tightly attached to the pipe wall at each position, and the coating effect is good. The coating can be accurately covered, and the utilization rate is greatly improved.

Description

Technical Field

[0001] This utility model relates to the technical field of oilfield oil and gas heating furnace equipment, and more specifically, to a corrosion-resistant coating device for the inner wall of a heating furnace coil. Background Technology

[0002] In oilfield gas heating furnaces, coils are placed in the hot water zone of the furnace, and oil and gas are heated in the furnace through the coils. In order to reduce the corrosion of the inner wall surface of the coils by oil and gas and improve the service life of the heating furnace equipment, in recent years, oilfield green remanufacturing projects have required anti-corrosion treatment of the inner surface of the heating furnace coils: that is, coating with oil-resistant paint. At present, most coating methods adopt the cyclone method: that is, the paint is carried into the coil by gas to coat the inner wall surface. However, the coil is composed of multiple straight and bent pipes welded together, and the inner wall surface has a very irregular shape. Therefore, the coating thickness of the cyclone method is uneven, the paint utilization rate is low, and the equipment investment is large. Utility Model Content

[0003] In order to overcome the shortcomings of the existing technology, this utility model provides a corrosion-resistant coating device for the inner wall of a heating furnace coil, which has the advantage of precise coating coverage.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a corrosion-resistant coating device for the inner wall of a heating furnace coil, comprising a first material cylinder and a second material cylinder. A threaded connector is fixedly installed on the upper part of the first and second material cylinders, and a first material valve and a second material valve are threadedly connected to the end of the threaded connector. A first paint valve and a first air valve are fixedly installed on the lower part of the first material cylinder, and a second paint valve and a second air valve are fixedly installed on the lower part of the second material cylinder. Concentric reducers are welded to the rear ends of the first and second material cylinders, and a straight connecting pipe is welded to the rear end of the concentric reducer. A flange is fixedly installed at the rear end of the straight connecting pipe, and the flange at the rear end of the first material cylinder is connected to the material to be coated. The inlet of the coil is connected to the flange at the rear end of the second material cylinder, which is connected to the outlet of the coil to be coated. The ends of the flanges are fixedly connected to the coil to be coated. The front ends of the first and second material cylinders are fixedly installed with threaded connectors. The front ends of the threaded connectors are threadedly connected to the first and second directional valves. The front ends of the first directional valves are connected to a three-way connector. The front ends of the three-way connectors are fixedly installed with an air inlet valve. The front ends of the air inlet valves and the second directional valves are fixedly installed with double threaded connectors. The three-way connectors and the double threaded connectors at the front ends of the second directional valves are connected through a connecting hose. The end of the air inlet valve is fixedly connected with an air inlet hose, and the air inlet hose is connected to an air compressor.

[0005] As a preferred embodiment of this utility model, a double deflector plate and a partition plate are fixedly installed inside the first and second material cylinders. Each partition plate has a ball-blocking hole. A coating ball is placed inside the first and second material cylinders, and the spherical surface of the ball-blocking hole conforms to the shape of the coating ball. Threaded pipes are fixedly installed on both sides of the partition plates of the first and second material cylinders. An eccentric reducer is welded to the rear end of the first and second material cylinders, and the concentric reducer can be replaced with an eccentric reducer. An elbow is welded to the rear end of the concentric reducer, and the straight pipe can be replaced with an elbow.

[0006] As a preferred embodiment of this utility model, the upper part of the first material cylinder and the second material cylinder are fixedly installed with an upper threaded connector, the end of which is threadedly connected to a first material valve and a second material valve. The front end of the first material cylinder and the second material cylinder are fixedly installed with a front threaded connector, the front end of which is threadedly connected to a first reversing valve and a second reversing valve. The lower part of the first material cylinder is fixedly installed with a first paint valve and a first air valve, and the lower part of the second material cylinder is fixedly installed with a second paint valve and a second air valve, and the corresponding valves are of the same specifications and models.

[0007] As a preferred technical solution of this utility model, a double-threaded connector is fixedly installed at the front end of the intake valve and the second reversing valve, and the three-way connector is connected to the double-threaded connector at the front end of the second reversing valve through a connecting hose.

[0008] As a preferred technical solution of this utility model, a double deflector plate and a partition plate are fixedly installed inside the first and second material cylinders. Each partition plate is provided with a ball-blocking hole. A coating ball is placed inside the first and second material cylinders, and the spherical surface of the ball-blocking hole conforms to the shape of the coating ball. A threaded connector is fixedly installed on both sides of the partition plate of the first and second material cylinders.

[0009] As a preferred technical solution of this utility model, the rear end of the concentric reducer is welded with an elbow, and the straight pipe can be replaced with an elbow, and the second barrel can be the structure shown in the figure.

[0010] As a preferred technical solution of this utility model, the rear ends of the first material cylinder and the second material cylinder are welded with eccentric reducers, and the concentric reducers can be replaced with eccentric reducers. The first material cylinder and the second material cylinder can be the structure shown in the figure.

[0011] As a preferred technical solution of this utility model, the first barrel and the second barrel are welded structural components composed of pipe fittings, and the pipe fittings are composed of tees, concentric reducers, straight pipes, elbows and eccentric reducers.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model uses a rubber ball to complete the coating work on the inner surface of the coil. Traditional coating methods are easily affected by the complex inner surface shape of the coil, resulting in uneven coating thickness, which not only affects the anti-corrosion effect but also wastes paint. However, this device perfectly overcomes the problem. The rubber ball rolls and contacts inside the coil, closely adhering to every part of the tube wall, making the coating smooth and uniform, and the paint can be accurately covered, greatly improving the utilization rate.

[0014] 2. From the perspective of the overall equipment architecture, this utility model abandons the complicated structure and does not have too many precise but expensive parts. The structure is simple and clear, which greatly reduces the difficulty of production and manufacturing. For enterprises, the initial equipment investment cost is significantly reduced, and the later maintenance is more convenient. While ensuring the quality of corrosion prevention, it maximizes economic benefits. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the coating process structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the coating device of this utility model;

[0017] Figure 3 This is a schematic diagram of the threaded connector structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the elbow structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the eccentric reducer structure of this utility model;

[0020] Figure 6 This utility model Figure 3 Enlarged view at point I;

[0021] Figure 7 This utility model Figure 4 View from A in the middle.

[0022] In the diagram: 1. First feed cylinder; 2. First feed valve; 3. First paint valve; 4. First air valve; 5. First directional valve; 6. Air inlet valve; 7. Double threaded connector; 8. T-connector; 9. Connecting hose; 10. Second directional valve; 11. Second air valve; 12. Second paint valve; 13. Second feed cylinder; 14. Second feed valve; 15. Double directional plate; 16. Partition plate; 17. Concentric reducer; 18. Straight-through connector; 19. Flange; 20. Ball stop hole; 21. Coating ball; 22. Lower threaded connector; 23. Front threaded connector; 24. Upper threaded connector; 25. Elbow; 26. Eccentric reducer; 27. Coil to be coated; 28. Air inlet hose. Detailed Implementation

[0023] 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.

[0024] like Figures 1 to 7 As shown, this utility model provides a corrosion-resistant coating device for the inner wall of a heating furnace coil, including a first material cylinder 1 and a second material cylinder 13. A threaded connector 24 is fixedly installed on the upper part of both the first and second material cylinders 1 and 13. A first material valve 2 and a second material valve 14 are threadedly connected to the end of the threaded connector 24. A first paint valve 3 and a first air valve 4 are fixedly installed on the lower part of the first material cylinder 1. A second paint valve 12 and a second air valve 11 are fixedly installed on the lower part of the second material cylinder 13. Concentric reducers 17 are welded to the rear ends of both the first and second material cylinders 1 and 13. A straight-through pipe 18 is welded to the rear end of the concentric reducer 17. A flange 19 is fixedly installed at the rear end of the straight-through pipe 18, and the flange 19 at the rear end of the first material cylinder 1 is connected to the inlet of the coil 27 to be coated. The flange 19 at the rear end of the first and second cylinders 13 is connected to the outlet of the coil 27 to be coated. The ends of the flange 19 are fixedly connected to the coil 27 to be coated. The front ends of the first cylinder 1 and the second cylinder 13 are fixedly installed with front threaded connectors 23. The front ends of the front threaded connectors 23 are threadedly connected to the first reversing valve 5 and the second reversing valve 10. The front ends of the first reversing valve 5 are connected to the three-way connector 8. The front ends of the three-way connector 8 are fixedly installed with an air inlet valve 6. The front ends of the air inlet valve 6 and the second reversing valve 10 are fixedly installed with double threaded connectors 7. The three-way connector 8 and the double threaded connector 7 at the front end of the second reversing valve 10 are connected through a connecting hose 9. The end of the air inlet valve 6 is fixedly connected with an air inlet hose 28, and the air inlet hose 28 is connected to an air compressor.

[0025] First, connect the first material cylinder 1, first material valve 2, first paint valve 3, first air valve 4, first reversing valve 5, tee connector 8, air inlet valve 6, and double threaded connector 7 as shown in the diagram; then connect the second material cylinder 13, second material valve 14, second paint valve 12, second air valve 11, second reversing valve 10, and double threaded connector 7 as shown in the diagram; then connect the other end of the first material cylinder 1 to the coil inlet flange, and connect the other end of the second material cylinder 13 to the coil outlet flange 19; finally, connect the air inlet ends of the two material cylinders as shown in the diagram through the connecting hose 9, and connect the air compressor to the common double threaded connector 7 through the air inlet hose 28. At this point, the connection of the coil coating device is completed.

[0026] The first material cylinder 1 and the second material cylinder 13 are fixedly installed with a double deflector plate 15 and a partition plate 16. Each partition plate 16 is provided with a ball-blocking hole 20. A coating ball 21 is placed inside the first material cylinder 1 and the second material cylinder 13, and the spherical surface of the ball-blocking hole 20 matches the shape of the coating ball 21. The two sides of the partition plate 16 of the first material cylinder 1 and the second material cylinder 13 are fixedly installed with threaded pipes 22. The rear ends of the first material cylinder 1 and the second material cylinder 13 are welded with eccentric reducers 26, and concentric reducers 17 can be replaced with eccentric reducers 26. The rear ends of concentric reducers 17 are welded with elbows 25, and straight pipes 18 can be replaced with elbows 25.

[0027] The partition 16, with its ball-blocking hole 20, provides a seal by matching the shape of the coating ball 21. The oblique arrangement of the double-directional plate 15 prevents paint from the backflow air from entering the first directional valve 5 on the left. The concentric reducer 17 can be replaced with an eccentric reducer 26 to facilitate the flow of the coating liquid. Figure 5 The straight connector 18 can be replaced with an elbow 25, allowing the first and second material cylinders 1 and 13 to adapt to different coil inlet / outlet arrangements and connection requirements. (See details below) Figure 4 .

[0028] The upper part of the first material cylinder 1 and the second material cylinder 13 is fixedly installed with an upper threaded connector 24. The end of the upper threaded connector 24 is threadedly connected to the first material valve 2 and the second material valve 14. The front end of the first material cylinder 1 and the second material cylinder 13 is fixedly installed with a front threaded connector 23. The front end of the front threaded connector 23 is threadedly connected to the first reversing valve 5 and the second reversing valve 10. The lower part of the first material cylinder 1 is fixedly installed with a first paint valve 3 and a first air valve 4. The lower part of the second material cylinder 13 is fixedly installed with a second paint valve 12 and a second air valve 11, and the corresponding valves are exactly the same.

[0029] The intake valve 6 and the front end of the second reversing valve 10 are fixedly installed with a double threaded connector 7, and the three-way connector 8 is connected to the double threaded connector 7 at the front end of the second reversing valve 10 through a connecting hose 9.

[0030] The first material cylinder 1 and the second material cylinder 13 are fixedly installed with a double deflector plate 15 and a partition plate 16. Each partition plate 16 is provided with a ball-blocking hole 20. A coating ball 21 is placed inside the first material cylinder 1 and the second material cylinder 13, and the spherical surface of the ball-blocking hole 20 matches the shape of the coating ball 21. A threaded pipe 22 is fixedly installed on both sides of the partition plate 16 of the first material cylinder 1 and the second material cylinder 13.

[0031] Among them, the rear end of the concentric reducer 17 is welded with an elbow 25, and the straight pipe 18 can be replaced with an elbow 25.

[0032] Among them, the rear ends of the first material cylinder 1 and the second material cylinder 13 are welded with eccentric reducers 26, and the concentric reducers 17 can be replaced with eccentric reducers 26.

[0033] Among them, the first material cylinder 1 and the second material cylinder 13 are welded structural components composed of pipe fittings, and the pipe fittings are composed of tees, concentric reducers 17, straight pipes 18, elbows 25 and eccentric reducers 26.

[0034] Working principle and usage process of this utility model:

[0035] Before coating, first close the first air valve 4 and the first paint valve 3, and open the first material valve 2 and the first reversing valve 5. Add a measured amount of internal anti-corrosion coating to the first material cylinder 1 through the first material valve 2. Then, put the appropriate coating ball 21 into the material cylinder. After that, close the first material valve 2, the second material valve 14, and the second reversing valve 10. Then, open the second air valve 11 and the second paint valve 12, and then slowly open the air inlet valve. The gas pressure pushes the ball and thus pushes the internal anti-corrosion coating along the inner wall of the pipe. The air in the pipe is discharged through the second air valve 11 and the second paint valve 12. When the coating begins to enter the second material cylinder 13, coating is discharged from the gas in the second paint valve 12. At this time, the second paint valve 12 is closed. Finally, when the ball reaches the second material cylinder 13, it is blocked by the ball-blocking hole 20 on its inner partition 16. No more gas is discharged from the second air valve 11. At this time, the air inlet valve 6 is closed, and then the second air valve 11 is closed. This completes one coating of the inner surface of the pipe.

[0036] Afterwards, open the second material valve 14, check the remaining paint and replenish it, then remove the previous paint ball 21 and replace it with a new paint ball 21. Repeat the above steps to apply a second coat of paint to the inner surface of the pipe in the opposite direction until the amount of paint is appropriate.

[0037] Open the first material valve 2, the first paint valve 3, the first air valve 4, the second material valve 14, the second paint valve 12, and the second air valve 11 to drain the remaining coating liquid in the first material cylinder 1 and the second material cylinder 13. Take out the coating ball 21 and disassemble the flange 19 at the connection between the first material cylinder 1 and the second material cylinder 13 and the coil. Use special equipment to heat and keep the coil warm. The anti-corrosion coating on the inner surface of the coil is then completed.

[0038] 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.

[0039] 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 heating furnace coil inner wall anticorrosion coating device, comprising a first barrel (1) and a second barrel (13), characterized in that: The upper part of the first barrel (1) and the second barrel (13) is fixedly installed with an upper threaded joint (24), the end of the upper threaded joint (24) is threadedly connected with a first material valve (2) and a second material valve (14), the lower part of the first barrel (1) is fixedly installed with a first paint valve (3) and a first gas valve (4), the lower part of the second barrel (13) is fixedly installed with a second paint valve (12) and a second gas valve (11), the rear end of the first barrel (1) and the second barrel (13) is welded with a concentric reducing head (17), the rear end of the concentric reducing head (17) is welded with a straight-through connecting pipe (18), the rear end of the straight-through connecting pipe (18) is fixedly installed with a flange (19), the flange (19) at the rear end of the first barrel (1) is connected with the inlet of a coil pipe (27) to be coated, the flange (19) at the rear end of the second barrel (13) is connected with the outlet of the coil pipe (27) to be coated, the end of the flange (19) is fixedly connected with the coil pipe (27) to be coated, the front end of the first barrel (1) and the second barrel (13) is fixedly installed with a front threaded joint (23), the front end of the front threaded joint (23) is threadedly connected with a first reversing valve (5) and a second reversing valve (10), the front end of the first reversing valve (5) is connected with a three-way joint (8), the front end of the three-way joint (8) is fixedly installed with an air inlet valve (6), the front end of the air inlet valve (6) and the second reversing valve (10) is fixedly installed with a double-threaded joint (7), the three-way joint (8) and the double-threaded joint (7) at the front end of the second reversing valve (10) are connected through a connecting hose (9), the end of the air inlet valve (6) is fixedly connected with an air inlet hose (28), and the air inlet hose (28) is connected with an air compressor pack.

2. The heating furnace coil inner wall anticorrosion coating device according to claim 1, characterized in that: The inside of the first barrel (1) and the second barrel (13) is fixedly installed with a double-direction changing plate (15) and a partition plate (16), the partition plate (16) is provided with a ball blocking hole (20), the first barrel (1) and the second barrel (13) are placed with a coating ball (21), and the surface of the ball blocking hole (20) is consistent with the shape of the coating ball (21), the two sides of the partition plate (16) of the first barrel (1) and the second barrel (13) are fixedly installed with a lower threaded connecting pipe (22), the rear end of the first barrel (1) and the second barrel (13) is welded with an eccentric reducing head (26), and the concentric reducing head (17) can be replaced with the eccentric reducing head (26), the rear end of the concentric reducing head (17) is welded with an elbow (25), and the straight-through connecting pipe (18) can be replaced with the elbow (25).

3. The heating furnace coil inner wall anticorrosion coating device according to claim 1, characterized in that: The upper part of the first barrel (1) and the second barrel (13) is fixedly installed with an upper threaded joint (24), the end of which is threadedly connected with a first material valve (2) and a second material valve (14), the front end of the first barrel (1) and the second barrel (13) is fixedly installed with a front threaded joint (23), the front end of which is threadedly connected with a first reversing valve (5) and a second reversing valve (10), the lower part of the first barrel (1) is fixedly installed with a first paint valve (3) and a first gas valve (4), the lower part of the second barrel (13) is fixedly installed with a second paint valve (12) and a second gas valve (11), and the corresponding valve specifications are completely the same.

4. The heating furnace coil inner wall anticorrosion coating device according to claim 1, characterized in that: The front end of the air inlet valve (6) and the second reversing valve (10) is fixedly installed with a double-threaded joint (7), the tee joint (8) is connected with the double-threaded joint (7) at the front end of the second reversing valve (10) through a connecting hose (9).

5. The heating furnace coil inner wall anticorrosion coating device according to claim 1, characterized in that: The inside of the first barrel (1) and the second barrel (13) is fixedly installed with a double-changing-direction plate (15) and a partition plate (16), the partition plate (16) is provided with a ball blocking hole (20), the first barrel (1) and the second barrel (13) are placed with a brushing ball (21), and the surface of the ball blocking hole (20) is consistent with the shape of the brushing ball (21), the two sides of the partition plate (16) of the first barrel (1) and the second barrel (13) are fixedly installed with a lower threaded joint (22).

6. The heating furnace coil inner wall anticorrosion coating device according to claim 1, characterized in that: The rear end of the concentric reducer (17) is welded with an elbow (25), and the straight-through connecting pipe (18) can be replaced with the elbow (25).

7. The heating furnace coil inner wall anticorrosion coating device according to claim 1, characterized in that: The rear end of the first barrel (1) and the second barrel (13) is welded with an eccentric reducer (26), and the concentric reducer (17) can be replaced with the eccentric reducer (26).

8. The heating furnace coil inner wall anticorrosion coating device according to claim 1, characterized in that: The first barrel (1) and the second barrel (13) are welded structural members composed of pipe fittings, and the pipe fittings are composed of tees, concentric reducers (17), straight-through connecting pipes (18), elbows (25) and eccentric reducers (26). The first barrel (1) and the second barrel (13) are welded structural members composed of pipe fittings, and the pipe fittings are composed of tees, concentric reducers (17), straight-through connecting pipes (18), elbows (25) and eccentric reducers (26).

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