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

Abstract

The invention belongs to the technical field of oil field oil gas heating furnace equipment, and discloses a heating furnace coil 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. The coating work of the inner surface of the coil pipe is completed through the rubber balls, a traditional coating 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 balls make rolling contact in the coil pipe and are tightly attached to the pipe wall of 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] The invention belongs to the technical field of oil and gas heating furnace equipment in oil fields, and in particular relates to an anti-corrosion coating device for the inner wall of a heating furnace coil. Background Art

[0002] In the oil and gas heating furnace of the oil field, the coil is placed in the hot water area of ​​the furnace, and the oil and gas are heated in the furnace through the coil. In order to reduce the corrosion of the inner wall surface of the coil by oil and gas and improve the service life of the heating furnace equipment, the green remanufacturing project of the oil field in recent years requires the anti-corrosion treatment of the inner surface of the heating furnace coil: that is, coating with oil-resistant paint; the current coating method mostly adopts the cyclone coating method: that is, the paint is brought into the coil through the gas to coat the inner wall surface, and the coil is welded by multiple straight pipes and bent pipes, and the shape of the inner wall surface is extremely irregular. Therefore, the coating thickness of the cyclone method is uneven, the coating utilization rate is not high, and the equipment investment is large. Summary of the invention

[0003] The object of the present invention is to provide an anti-corrosion coating device for the inner wall of a heating furnace coil to solve the problems raised in the above-mentioned background technology.

[0004] In order to achieve the above-mentioned purpose, the present invention provides the following technical scheme: an anti-corrosion coating device for the inner wall of a heating furnace coil, comprising a first barrel and a second barrel, the upper parts of the first barrel and the second barrel are fixedly installed with an upper threaded joint, the ends of the upper threaded joint are threadedly connected with a first material valve and a second material valve, the lower part of the first barrel is fixedly installed with a first paint valve and a first air valve, the lower part of the second barrel is fixedly installed with a second paint valve and a second air valve, the rear ends of the first barrel and the second barrel are fixedly installed with concentric reducers, the rear ends of the concentric reducers are welded with a straight-through pipe, the rear end of the straight-through pipe is fixedly installed with a flange, and the flange at the rear end of the first barrel is connected to the coil to be coated. The pipe inlet is connected, and the flange at the rear end of the second barrel is connected to the coil outlet to be coated, and the ends of the flanges are fixedly connected to the coil to be coated, and the front ends of the first and second barrels are fixedly installed with a front threaded joint, and the front end of the front threaded joint is threadedly connected with the first reversing valve and the second reversing valve, the front end of the first reversing valve is connected with a three-way joint, and the front end of the three-way joint is fixedly installed with an air intake valve, and the front ends of the air intake valve and the second reversing valve are fixedly installed with a double threaded joint, the three-way joint is connected to the double threaded joint at the front end of the second reversing valve through a connecting hose, and the end of the air intake valve is fixedly connected with an air intake hose, and the air intake hose is connected to the air compressor.

[0005] Preferably, a double deflection plate and a partition are fixedly installed inside the first barrel and the second barrel, and a ball blocking hole is opened on the partition. A brush ball is placed inside the first barrel and the second barrel, and the spherical surface of the ball blocking hole conforms to the shape of the brush ball. Lower threaded connecting pipes are fixedly installed on both sides of the partitions of the first barrel and the second barrel, and an eccentric reducer is welded at the rear end of the first barrel and the second barrel, and the concentric reducer can be replaced with an eccentric reducer, and an elbow is welded at the rear end of the concentric reducer, and the straight connecting pipe can be replaced with an elbow.

[0006] Preferably, an upper threaded joint is fixedly installed on the upper part of the first barrel and the second barrel, and the end of the upper threaded joint is threadedly connected with the first material valve and the second material valve, the front end of the first barrel and the second barrel is fixedly installed with a front threaded joint, and the front end of the front threaded joint is threadedly connected with the first reversing valve and the second reversing valve, the lower part of the first barrel is fixedly installed with the first paint valve and the first air valve, and the lower part of the second barrel is fixedly installed with the second paint valve and the second air valve, and the corresponding valve specifications and models are exactly the same.

[0007] Preferably, a double threaded joint is fixedly mounted on the front end of the air intake valve and the second reversing valve, and the three-way joint is connected to the double threaded joint at the front end of the second reversing valve via a connecting hose.

[0008] Preferably, double deflection plates and partitions are fixedly installed inside the first barrel and the second barrel, and ball blocking holes are opened on the partitions. Brush balls are placed inside the first barrel and the second barrel, and the spherical surface of the ball blocking holes conforms to the shape of the brush balls. Lower threaded connecting pipes are fixedly installed on both sides of the partitions of the first barrel and the second barrel.

[0009] Preferably, an elbow is welded at the rear end of the concentric reducer, and the straight-through pipe can be replaced with an elbow, and the second barrel can be the structure of the figure.

[0010] Preferably, the rear ends of the first barrel and the second barrel are welded with eccentric reducers, and the concentric reducers can be replaced with eccentric reducers, and the first barrel and the second barrel can be the structure of the figure.

[0011] Preferably, the first barrel and the second barrel are welded structural parts composed of pipe fittings, and the pipe fittings are composed of tees, concentric reducers, straight-through pipes, elbows and eccentric reducers.

[0012] The beneficial effects of the present invention are as follows:

[0013] 1. The present invention uses rubber balls to complete the painting work on the inner surface of the coil. The traditional painting method is easily disturbed by the complex inner surface shape of the coil, resulting in uneven coating thickness, which not only affects the anti-corrosion effect, but also causes paint waste. However, this device perfectly overcomes the problem. The rubber balls roll and contact in the coil, tightly fitting every pipe wall, making the coating smooth and uniform, the paint can be accurately covered, and the utilization rate is greatly improved.

[0014] 2. From the perspective of the overall equipment architecture, the present invention abandons complicated structures, does not have too many precise but expensive parts, and has a simple and clear structure, which greatly reduces the difficulty of production and manufacturing. For enterprises, the initial equipment investment cost is significantly reduced, and later maintenance is more convenient. While ensuring the anti-corrosion quality, it achieves maximum economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the coating process structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the structure of the coating device of the present invention;

[0017] Figure 3 It is a schematic diagram of the connection structure of the present invention;

[0018] Figure 4 This is a schematic diagram of the elbow structure of the present invention;

[0019] Figure 5 This is a schematic diagram of the eccentric reducer structure of the present invention;

[0020] Figure 6 For the present invention Figure 3 The enlarged image at point I in the middle;

[0021] Figure 7 For the present invention Figure 4 Center A view.

[0022] In the figure: 1. first barrel; 2. first material valve; 3. first paint valve; 4. first air valve; 5. first reversing valve; 6. air inlet valve; 7. double threaded joint; 8. three-way joint; 9. connecting hose; 10. second reversing valve; 11. second air valve; 12. second paint valve; 13. second barrel; 14. second material valve; 15. double change-over plate; 16. partition; 17. concentric reducer; 18. straight-through pipe; 19. flange; 20. ball-blocking hole; 21. paint ball; 22. lower threaded pipe; 23. front threaded joint; 24. upper threaded joint; 25. elbow; 26. eccentric reducer; 27. coil to be painted; 28. air inlet hose. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] like Figures 1 to 7 As shown, an embodiment of the present invention provides an anti-corrosion coating device for the inner wall of a heating furnace coil, comprising a first barrel 1 and a second barrel 13, an upper threaded joint 24 is fixedly installed on the upper part of the first barrel 1 and the second barrel 13, and a first material valve 2 and a second material valve 14 are threadedly connected to the end of the upper threaded joint 24, a first paint valve 3 and a first air valve 4 are fixedly installed on the lower part of the first barrel 1, a second paint valve 12 and a second air valve 11 are fixedly installed on the lower part of the second barrel 13, a concentric reducer 17 is welded to the rear end of the first barrel 1 and the second barrel 13, a straight-through pipe 18 is welded to the rear end of the concentric reducer 17, a flange 19 is fixedly installed on the rear end of the straight-through pipe 18, and the flange 19 at the rear end of the first barrel 1 is connected to the coil 27 to be coated. The flange 19 at the rear end of the second barrel 13 is connected to the outlet of the coil 27 to be coated, and the ends of the flange 19 are fixedly connected to the coil 27 to be coated. The front ends of the first barrel 1 and the second barrel 13 are fixedly installed with a front threaded joint 23, and the front end of the front threaded joint 23 is threadedly connected with the first reversing valve 5 and the second reversing valve 10. The front end of the first reversing valve 5 is connected with a three-way joint 8, and the front end of the three-way joint 8 is fixedly installed with an intake valve 6. The intake valve 6 and the front end of the second reversing valve 10 are fixedly installed with a double threaded joint 7. The three-way joint 8 is connected to the double threaded joint 7 at the front end of the second reversing valve 10 through a connecting hose 9. The end of the intake valve 6 is fixedly connected with an intake hose 28, and the intake hose 28 is connected to the air compressor bag.

[0025] First, connect the first barrel 1, the first material valve 2, the first paint valve 3, the first air valve 4, the first reversing valve 5, the three-way joint 8, the air inlet valve 6 and the double threaded joint 7 as shown in the figure; connect the second barrel 13, the second material valve 14, the second paint valve 12, the second air valve 11, the second reversing valve 10 and the double threaded joint 7 as shown in the figure; then connect the other end of the first barrel 1 to the coil inlet flange, and connect the other end of the second barrel 13 to the coil outlet flange 19; then connect the air inlet ends of the two barrels through the connecting hose 9 as shown in the figure, and connect the air compressor bag to the common double threaded joint 7 through the air inlet hose 28, and now the connection of the coil coating device is completed.

[0026] Among them, a double changing plate 15 and a partition 16 are fixedly installed inside the first barrel 1 and the second barrel 13, and a ball blocking hole 20 is opened on the partition 16. A brush ball 21 is placed inside the first barrel 1 and the second barrel 13, and the spherical surface of the ball blocking hole 20 conforms to the shape of the brush ball 21. Lower threaded connecting pipes 22 are fixedly installed on both sides of the partition 16 of the first barrel 1 and the second barrel 13. Eccentric reducers 26 are welded at the rear ends of the first barrel 1 and the second barrel 13, and the concentric reducers 17 can be replaced with eccentric reducers 26. An elbow 25 is welded at the rear ends of the concentric reducers 17, and the straight connecting pipe 18 can be replaced with an elbow 25.

[0027] The baffle plate 16 is provided with a ball-blocking hole 20, whose spherical surface is in accordance with the shape of the brush ball 21 to seal, and the double-direction-changing plate 15 is arranged obliquely to prevent the paint in the return air from entering the first reversing valve 5 at the left end; the concentric reducer 17 can be replaced with an eccentric reducer 26 to facilitate the flow of the coating liquid. Figure 5 The straight pipe 18 can be replaced with an elbow 25, so that the first barrel 1 and the second barrel 13 can adapt to different coil inlet and outlet layouts and connection requirements. Figure 4 .

[0028] Among them, an upper threaded joint 24 is fixedly installed on the upper part of the first barrel 1 and the second barrel 13, and the end of the upper threaded joint 24 is threadedly connected with the first material valve 2 and the second material valve 14, and a front threaded joint 23 is fixedly installed on the front end of the first barrel 1 and the second barrel 13, and the front end of the front threaded joint 23 is threadedly connected with the first reversing valve 5 and the second reversing valve 10, and the first paint valve 3 and the first air valve 4 are fixedly installed on the lower part of the first barrel 1, and the second paint valve 12 and the second air valve 11 are fixedly installed on the lower part of the second barrel 13, and the corresponding valve specifications and models are exactly the same.

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

[0030] Among them, a double changing plate 15 and a partition 16 are fixedly installed inside the first barrel 1 and the second barrel 13, and a ball blocking hole 20 is opened on the partition 16. A brush ball 21 is placed inside the first barrel 1 and the second barrel 13, and the spherical surface of the ball blocking hole 20 is consistent with the shape of the brush ball 21. Lower threaded connecting pipes 22 are fixedly installed on both sides of the partition 16 of the first barrel 1 and the second barrel 13.

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

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

[0033] The first barrel 1 and the second barrel 13 are welded structural parts composed of pipe fittings, and the pipe fittings are composed of a tee, a concentric reducer 17 , a straight pipe 18 , an elbow 25 and an eccentric reducer 26 .

[0034] Working principle and usage process:

[0035] Before painting, 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 certain amount of internal anti-corrosion paint into the first barrel 1 through the first material valve 2, put the applicable brush ball 21 into the barrel, then 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 rubber ball and then pushes the internal anti-corrosion paint along the inner wall of the pipeline, and the air in the pipeline is discharged through the second air valve 11 and the second paint valve 12; when the paint begins to enter the second barrel 13, the gas in the second paint valve 12 is discharged, and the second paint valve 12 is closed at this time, and finally when the rubber ball reaches the second barrel 13, it is blocked by the ball blocking hole 20 on the inner partition 16 thereof, and the gas is no longer discharged from the second air valve 11, and the air inlet valve 6 is closed at this time, and then the second air valve 11 is closed; thus, one painting of the inner surface of the pipeline is completed;

[0036] Then open the second material valve 14, check the remaining paint and refill it, take out the previous painting ball 21, and replace it with a new one, repeat the above steps to paint the inner surface of the pipeline twice in the opposite direction; until the paint amount is appropriate.

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

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

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

2. The device for anti-corrosion coating the inner wall of a heating furnace coil according to claim 1, characterized in that: A double deflection plate (15) and a partition (16) are fixedly installed inside the first barrel (1) and the second barrel (13), and a ball blocking hole (20) is opened on the partition (16). A brush ball (21) is placed inside the first barrel (1) and the second barrel (13), and the spherical surface of the ball blocking hole (20) conforms to the shape of the brush ball (21). Lower threaded pipes (22) are fixedly installed on both sides of the partition (16) of the first barrel (1) and the second barrel (13). An eccentric reducer (26) is welded at the rear end of the first barrel (1) and the second barrel (13), and the concentric reducer (17) can be replaced with an eccentric reducer (26). An elbow (25) is welded at the rear end of the concentric reducer (17), and the straight pipe (18) can be replaced with an elbow (25).

3. The device for anti-corrosion coating the inner wall of a heating furnace coil according to claim 1, characterized in that: An upper threaded joint (24) is fixedly installed on the upper part of the first barrel (1) and the second barrel (13), and the end of the upper threaded joint (24) is threadedly connected to the first material valve (2) and the second material valve (14). A front threaded joint (23) is fixedly installed on the front end of the first barrel (1) and the second barrel (13), and the front end of the front threaded joint (23) is threadedly connected to the first reversing valve (5) and the second reversing valve (10). A first paint valve (3) and a first air valve (4) are fixedly installed on the lower part of the first barrel (1), and a second paint valve (12) and a second air valve (11) are fixedly installed on the lower part of the second barrel (13), and the corresponding valve specifications and models are exactly the same.

4. The device for anti-corrosion coating the inner wall of a heating furnace coil according to claim 1, characterized in that: A double threaded joint (7) is fixedly mounted at the front end of the air intake valve (6) and the second reversing valve (10), and the three-way joint (8) is connected to the double threaded joint (7) at the front end of the second reversing valve (10) via a connecting hose (9).

5. The device for anti-corrosion coating the inner wall of a heating furnace coil according to claim 1, characterized in that: A double deflection plate (15) and a partition (16) are fixedly installed inside the first barrel (1) and the second barrel (13), and a ball blocking hole (20) is opened on the partition (16). A brush ball (21) is placed inside the first barrel (1) and the second barrel (13), and the spherical surface of the ball blocking hole (20) is consistent with the shape of the brush ball (21). Lower threaded pipes (22) are fixedly installed on both sides of the partition (16) of the first barrel (1) and the second barrel (13).

6. The device for anti-corrosion coating the inner wall of a heating furnace coil 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 pipe (18) can be replaced with the elbow (25).

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

8. The device for anti-corrosion coating the inner wall of a heating furnace coil according to claim 1, characterized in that: The first barrel (1) and the second barrel (13) are welded structural parts composed of pipe fittings, and the pipe fittings are composed of a tee, a concentric reducer (17), a straight pipe (18), an elbow (25) and an eccentric reducer (26).

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