An anti-corrosion spraying device for surface treatment of sucker rods

Abstract

The present invention relates to the field of spraying technology, and provides an anti-corrosion spraying device for surface treatment of sucker rods, which includes a frame, an anti-corrosion liquid tank, a horizontal pipe, a spray head and a plurality of brackets. Above each bracket, there is a triangular plate. The bottom surface of the triangular plate is a horizontal plane, and the top surface of the triangular plate is an inclined plane. A linear driving element I is installed on the frame. The telescopic end of the linear driving element I is connected to a slider. A chute is arranged on the top surface of the triangular plate, and the slider is slidably connected with the chute. The end faces of the slider and the chute are connected by a first return spring. The bottom surface of the triangular plate is connected with an upper brush cotton, the surface of the bracket is in an arc concave shape, and the surface of the bracket is connected with a lower brush cotton. The anti-corrosion liquid tank transports the anti-corrosion liquid to the lower brush cotton and the upper brush cotton through a pipeline. During use, the upper brush cotton presses on the sucker rod and pushes the sucker rod to rotate. The upper brush cotton and the lower brush cotton will brush the contact part between the sucker rod and the bracket, ensuring that the sucker rod undergoes a full-range anti-corrosion spraying operation.

Description

Technical Field

[0001] The present invention relates to the technical field of spraying, and specifically relates to an anti-corrosion spraying device for surface treatment of sucker rods. Background Art

[0002] As a core component in oil extraction, sucker rods serve in the downhole environment with high temperature, high pressure, and high corrosiveness (such as containing hydrogen sulfide and chloride ions) for a long time. Their surface anti-corrosion performance directly determines the service life and maintenance cost. In traditional anti-corrosion spraying processes, sucker rods need to be supported by brackets + rotated for spraying to achieve surface coating coverage. However, due to the characteristics of sucker rods being slender (usually with a diameter of 16 - 30 mm and a length of up to 8 - 12 m) and easily bent and deformed, the following technical bottlenecks occur: The existing process relies on multiple sets of brackets (such as arc brackets, V-shaped rollers, cantilever brackets) to fix sucker rods. However, the contact area between the brackets and the rod body (the contact area accounts for about 5% - 8% of the total surface area) cannot be covered by the spray gun due to physical occlusion, forming an anti-corrosion blind area. This anti-corrosion blind area needs to be treated by manual supplementary coating or secondary spraying. The proportion of the supplementary coating time for a single sucker rod is as high as 20% - 30%, resulting in a reduction in the overall processing efficiency. Therefore, an anti-corrosion spraying device for surface treatment of sucker rods is needed to solve the above problems. Summary of the Invention

[0003] The purpose of the present invention is to provide an anti-corrosion spraying device for surface treatment of sucker rods, aiming to solve the problems mentioned in the background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: An anti-corrosion spraying device for surface treatment of sucker rods includes a frame, an anti-corrosion liquid tank, a horizontal pipe, a spray head, and several brackets. Above each bracket, a triangular plate is provided. The bottom surface of the triangular plate is a horizontal plane, and the top surface of the triangular plate is an inclined plane. A linear driving element one is installed on the frame. The telescopic end of the linear driving element one is connected to a slider. A chute is provided on the top surface of the triangular plate. The slider is slidably connected with the chute. The end faces of the slider and the chute are connected by a first return spring. The bottom surface of the triangular plate is connected to an upper brush cotton. The surface of the bracket is in an arc concave shape, and the surface of the bracket is connected to a lower brush cotton. The anti-corrosion liquid tank transports anti-corrosion liquid to the lower brush cotton and the upper brush cotton through a pipeline.

[0005] As a further solution of the present invention, an L-shaped plate is provided on one side of each triangular plate. The L-shaped plate consists of a vertical plate and a horizontal plate. The L-shaped plate is connected to the triangular plate through a connecting plate. An installation plate is connected to the side surface of the triangular plate. A linear driving element two is fixed on the installation plate. When the telescopic end of the linear driving element two extends to a set length, it will contact one end of the horizontal plate. The linear driving element two and the L-shaped plate form a U-shaped structure.

[0006] As a further solution of the present invention, a groove is provided on the side of the L-shaped plate close to the linear drive element II, and a heating wire is installed in the groove. A plurality of heaters are fixedly installed on the frame, and the heaters are located above the triangular plate. The high end of the triangular plate is directly above the bracket, and the L-shaped plate is arranged at the low end of the triangular plate.

[0007] As a further solution of the present invention, the distance between the surface of the horizontal plate in the L-shaped plate and the bottom surface of the triangular plate is greater than the diameter of the sucker rod; when the linear drive element II is fully retracted, the telescopic end of the linear drive element II is not lower than the bottom surface of the triangular plate.

[0008] As a further solution of the present invention, a second infusion tube is connected to the anticorrosive liquid tank. The second infusion tube is connected to the upper brush cotton through the first hose, and the second infusion tube is connected to the lower brush cotton through the second hose.

[0009] As a further solution of the present invention, a delivery pipe is arranged in the triangular plate. A plurality of communication pipes are arranged on the side wall of the delivery pipe close to the upper brush cotton, and the plurality of communication pipes are distributed in a linear array. The communication pipes connect the upper brush cotton with the delivery pipe. A top column is arranged in the communication pipe. One end of the top column extending into the delivery pipe is connected with a plug cover plate, and the plug cover plate is connected with the inner wall of the delivery pipe through a second return spring. The diameter of the top column is smaller than the inner diameter value of the communication pipe; when the upper brush cotton is squeezed by the sucker rod, the corresponding top column will move upward, and the top column will push up the plug cover plate, and the anticorrosive liquid will enter the upper brush cotton from the delivery pipe.

[0010] As a further solution of the present invention, the cross section of the chute is in an inverted T shape, and the cross section of the slider is also in an inverted T shape; a plurality of the brackets are distributed in a linear array, and the brackets are fixedly installed on the frame.

[0011] As a further solution of the present invention, a liquid pump is fixedly installed on the frame. The input end of the liquid pump is connected to the anticorrosive liquid tank, the output end of the liquid pump is connected to a first infusion tube, and the first infusion tube is connected to the horizontal tube. A plurality of the nozzles are installed on the horizontal tube.

[0012] In summary, the beneficial effects of the present invention are as follows:

[0013] Through the arrangement of the triangular plate, the linear drive element I, the lower brush cotton, the upper brush cotton, the slider, the chute and the first return spring, the triangular plate will press downward against the sucker rod, and the upper brush cotton will press on the sucker rod and push the sucker rod to rotate, which is convenient for the nozzle to completely spray the side surface of the sucker rod. In addition, during the rotation of the sucker rod, the upper brush cotton and the lower brush cotton will brush the contact part between the sucker rod and the bracket, ensuring that the sucker rod is subjected to a full range of anticorrosive spraying operations without the need for supplementary coating, greatly improving the work efficiency. Description of the Drawings

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings, where:

[0015] Figure 1 Structural schematic of an anti-corrosion spraying device for surface treatment of sucker rods in an embodiment of the present invention Figure 1 。

[0016] Figure 2 Structural schematic of an anti-corrosion spraying device for surface treatment of sucker rods in an embodiment of the present invention Figure 2 。

[0017] Figure 3 Structural schematic of an anti-corrosion spraying device for surface treatment of sucker rods in an embodiment of the present invention Figure 3 。

[0018] Figure 4 Connection schematic of the triangular plate in an anti-corrosion spraying device for surface treatment of sucker rods in an embodiment of the present invention.

[0019] Figure 5 For Figure 2 Partial enlarged schematic diagram at position A in

[0020] Figure 6 Connection schematic of the upper brush cotton and the lower brush cotton in an anti-corrosion spraying device for surface treatment of sucker rods in an embodiment of the present invention.

[0021] Figure 7 For Figure 6 Partial enlarged schematic diagram at position B in

[0022] Reference numerals: 1 - frame, 2 - anti-corrosion liquid tank, 3 - liquid pump, 4 - first infusion pipe, 5 - horizontal pipe, 6 - nozzle, 7 - support, 8 - second infusion pipe, 9 - first hose, 10 - second hose, 11 - triangular plate, 12 - linear driving element one, 13 - L-shaped plate, 14 - connecting plate, 15 - air heater, 16 - lower brush cotton, 17 - upper brush cotton, 18 - mounting plate, 19 - linear driving element two, 20 - slider, 21 - chute, 22 - first reset spring, 23 - groove, 24 - heating wire, 25 - conveying pipe, 26 - communicating pipe, 27 - ejector post, 28 - plug cover plate, 29 - second reset spring. Detailed implementation manners

[0023] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further elaborates on the present invention in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] The following describes in detail the specific implementation of the present invention in conjunction with specific embodiments.

[0025] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5An embodiment of the present invention provides an anti-corrosion spraying device for treating the surface of a sucker rod, comprising a frame 1, an anti-corrosion liquid tank 2, a horizontal pipe 5, a nozzle 6, and a plurality of brackets 7. The anti-corrosion liquid tank 2 is fixedly mounted on the top surface of the frame 1, the bracket 7 is used to place the sucker rod, and the nozzle 6 is used to spray anti-corrosion liquid to perform anti-corrosion treatment on the surface of the sucker rod. A liquid pump 3 is fixedly mounted on the frame 1, the input end of the liquid pump 3 is connected to the anti-corrosion liquid tank 2, and the output end of the liquid pump 3 is connected to a first liquid infusion pipe 4, which is connected to the horizontal pipe 5. A plurality of nozzles 6 are mounted on the horizontal pipe 5. Starting the liquid pump 3 causes the nozzle 6 to spray the anti-corrosion liquid. A triangular plate 11 is provided above each of the brackets 7. Preferably, the triangular plate 11 is a right-angled triangular plate, the bottom surface of the triangular plate 11 is a horizontal surface, and the top surface of the triangular plate 11 is an inclined surface. A linear drive element 12 is installed on the frame 1, and the telescopic end of the linear drive element 12 is fixedly connected to a slider 20. A slide groove 21 is provided on the top surface of the triangular plate 11, and the slider 20 is slidably matched with the slide groove 21. The slider 20 is connected to the end surface of the slide groove 21 by a return spring 22. The cross-section of the slide groove 21 is an inverted T shape, and the cross-section of the slider 20 is also an inverted T shape. In this way, the slider 20 will not separate from the slide groove 21; several of the brackets 7 are distributed in a linear array, and the brackets 7 are fixedly installed on the frame 1. The bottom surface of the triangular plate 11 is connected to the upper brush cotton 17, and the surface of the bracket 7 is an arc concave. The surface of the bracket 7 is connected to the lower brush cotton 16, and the antiseptic liquid tank 2 transports the antiseptic liquid to the lower brush cotton 16 and the upper brush cotton 17 through a pipeline. When in use, place the sucker rod on the bracket 7, then start the linear drive element 12 and the liquid pump 3, the nozzle 6 will spray the anti-corrosion liquid to perform anti-corrosion treatment on the surface of the sucker rod, the linear drive element 12 will cause the triangular plate 11 to drop, and when the upper brush cotton 17 contacts the surface of the sucker rod, the triangular plate 11 cannot continue to drop, and the slider 20 will continue to drop. Under the action of the slide 21 and the inclined surface, the triangular plate 11 starts to move horizontally, and the upper brush cotton 17 presses the sucker rod and pushes the sucker rod to rotate one circle, so that the nozzle 6 can completely spray the side of the sucker rod. In addition, during the rotation of the sucker rod, the upper brush cotton 17 and the lower brush cotton 16 will brush the contact part of the sucker rod and the bracket 7 to ensure that the sucker rod is fully anti-corroded, which is efficient and convenient.

[0026] In an embodiment of the present invention, an L-shaped plate 13 is provided on one side of each triangular plate 11. The L-shaped plate 13 is composed of a vertical plate and a horizontal plate. The L-shaped plate 13 is connected to the triangular plate 11 through a connecting plate 14. An installation plate 18 is connected to the side surface of the triangular plate 11. A linear driving element II 19 is fixed on the installation plate 18. When the telescopic end of the linear driving element II 19 extends to a certain length, it will contact one end of the horizontal plate. The linear driving element II 19 and the L-shaped plate 13 form a U-shaped structure. By providing the L-shaped plate 13 and the linear driving element II 19, the sucker rod coated with the anticorrosive liquid can be conveniently lifted. The linear driving element II 19 and the linear driving element I 12 are hydraulic cylinders, air cylinders or electric push rods.

[0027] In an embodiment of the present invention, a groove 23 is provided on the side surface of the L-shaped plate 13 close to the linear driving element II 19. An electric heating wire 24 is installed in the groove 23. A plurality of warm air blowers 15 are fixedly installed on the frame 1. The warm air blowers 15 are located above the triangular plate 11. The high end of the triangular plate 11 is directly above the support 7. The L-shaped plate 13 is arranged at the low end of the triangular plate 11. When the triangular plate 11 descends, the L-shaped plate 13 will not touch the sucker rod on the support 7. The distance between the surface of the horizontal plate in the L-shaped plate 13 and the bottom surface of the triangular plate 11 is greater than the diameter of the sucker rod. When the linear driving element II 19 is fully contracted, the telescopic end of the linear driving element II 19 is not lower than the bottom surface of the triangular plate 11, so as to avoid the telescopic end of the linear driving element II 19 touching the sucker rod during the horizontal movement of the triangular plate 11. When the triangular plate 11 moves horizontally, the horizontal plate of the L-shaped plate 13 is located below the sucker rod, and the L-shaped plate 13 will slowly approach the sucker rod. Finally, the L-shaped plate 13 will form a semi-surrounding of the sucker rod. Start the linear driving element II 19 to make the telescopic end of the linear driving element II 19 contact one end of the horizontal plate to form a full surrounding of the sucker rod. Then start the electric heating wire 24 to quickly dry the anticorrosive liquid on the surface of the surrounded sucker rod. After the anticorrosive liquid at this part is dried, start the linear driving element I 12 to make the slider 20 move upward. Under the action of the L-shaped plate 13, the entire sucker rod will also move upward. Finally, start the warm air blower 15 to comprehensively dry the anticorrosive liquid on the surface of the sucker rod, which is very efficient.

[0028] Please refer to Figures 1 to 7, in the embodiment of the present invention, a second infusion tube 8 is connected to the anti-corrosion liquid tank 2. The second infusion tube 8 is communicated with the upper brush cotton 17 through a first hose 9, and the second infusion tube 8 is communicated with the lower brush cotton 16 through a second hose 10. A delivery pipe 25 is arranged in the triangular plate 11. The delivery pipe 25 is horizontally arranged. A plurality of communicating pipes 26 are arranged on the side wall of the delivery pipe 25 close to the upper brush cotton 17. The plurality of communicating pipes 26 are distributed in a linear array. The communicating pipes 26 communicate the upper brush cotton 17 with the inside of the delivery pipe 25. A top column 27 is arranged in the communicating pipe 26. One end of the top column 27 extending into the delivery pipe 25 is connected with a plug cover plate 28. The plug cover plate 28 is connected with the inner wall of the delivery pipe 25 through a second return spring 29. The diameter of the top column 27 is smaller than the inner diameter value of the communicating pipe 26. The anti-corrosion liquid can enter the upper brush cotton 17 through the gap between the top column 27 and the inner wall of the communicating pipe 26. When the upper brush cotton 17 is squeezed by the sucker rod, the corresponding top column 27 will move upward. The top column 27 will push up the plug cover plate 28, and the anti-corrosion liquid will enter the upper brush cotton 17 from the delivery pipe 25. When the top column 27 is not under extrusion force, under the action of the second return spring 29, the plug cover plate 28 is closely attached to the end face of the communicating pipe 26, and the communicating pipe 26 is blocked. Similarly, there is a similar structure at the position of the lower brush cotton 16, which will not be elaborated here.

[0029] The working process of the embodiment of the present invention is as follows: First, place the sucker rod on the bracket 7, and then start the first linear driving element 12 and the liquid pump 3. The first linear driving element 12 will cause the triangular plate 11 to descend. When the upper brush cotton 17 contacts the surface of the sucker rod, the triangular plate 11 is blocked and cannot continue to descend, while the slider 20 will continue to descend. The triangular plate 11 starts to move horizontally. The upper brush cotton 17 presses on the sucker rod and pushes the sucker rod to rotate. In this way, the nozzle 6 can completely spray the side surface of the sucker rod. In addition, during the rotation of the sucker rod, the upper brush cotton 17 and the lower brush cotton 16 will brush the contact part between the sucker rod and the bracket 7 to ensure that the sucker rod is subjected to a full range of anti-corrosion operations. In addition, during the horizontal movement of the triangular plate 11, the L-shaped plate 13 will slowly approach the sucker rod. Finally, the L-shaped plate 13 will form a semi-surrounding of the sucker rod. Start the second linear driving element 19 to form a full surrounding of the sucker rod, and then start the heating wire 24 to quickly dry the anti-corrosion liquid on the surface of the surrounded sucker rod. After the anti-corrosion liquid at this part is dried, start the first linear driving element 12 to make the slider 20 move upward, and the sucker rod will also move upward. Finally, start the warm air blower 15 to completely dry the anti-corrosion liquid on the surface of the sucker rod. After complete drying, remove the processed sucker rod. Under the action of the first return spring 22, the triangular plate 11 will be horizontally reset to facilitate the next operation.

[0030] For those skilled in the art, although several embodiments and examples of the present invention have been described, these embodiments and examples are presented as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. These embodiments and their variations are included in the scope and gist of the invention and are included in the scope of the invention described in the claims and its equivalents.

[0031] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An anti-corrosion spraying device for the surface treatment of sucker rods, comprising a frame (1), an anti-corrosion liquid tank (2), a horizontal pipe (5), a spray head (6) and a plurality of brackets (7), characterized in that, Above each of the brackets (7), a triangular plate (11) is provided. The bottom surface of the triangular plate (11) is a horizontal plane, and the top surface of the triangular plate (11) is an inclined surface. A linear drive element I (12) is installed on the frame (1). The telescopic end of the linear drive element I (12) is connected to a slider (20). A chute (21) is provided on the top surface of the triangular plate (11). The slider (20) is slidably connected to the chute (21). The end faces of the slider (20) and the chute (21) are connected by a first return spring (22). The bottom surface of the triangular plate (11) is connected to an upper brush cotton (17). The surface of the bracket (7) is in an arc concave shape, and a lower brush cotton (16) is connected to the surface of the bracket (7). The anticorrosive liquid tank (2) transports anticorrosive liquid to the lower brush cotton (16) and the upper brush cotton (17) through a pipeline; on one side of each triangular plate (11), an L-shaped plate (13) is provided. The L-shaped plate (13) is composed of a vertical plate and a horizontal plate. The L-shaped plate (13) is connected to the triangular plate (11) through a connecting plate (14). An installation plate (18) is connected to the side surface of the triangular plate (11). A linear drive element II (19) is fixed on the installation plate (18). When the telescopic end of the linear drive element II (19) extends to a set length, it will contact one end of the horizontal plate. The linear drive element II (19) and the L-shaped plate (13) form a U-shaped structure; a groove (23) is provided on the side surface of the L-shaped plate (13) close to the linear drive element II (19). An electric heating wire (24) is installed in the groove (23). A plurality of warm air blowers (15) are fixedly installed on the frame (1). The warm air blowers (15) are located above the triangular plate (11). The high end of the triangular plate (11) is directly above the bracket (7), and the L-shaped plate (13) is arranged at the low end of the triangular plate (11).

2. The surface treatment and anti-corrosion spraying device for sucker rods according to claim 1, characterized in that, The distance between the surface of the horizontal plate in the L-shaped plate (13) and the bottom surface of the triangular plate (11) is greater than the diameter of the sucker rod; when the linear drive element II (19) is fully retracted, the telescopic end of the linear drive element II (19) is not lower than the bottom surface of the triangular plate (11).

3. The anti-corrosion spraying device for the surface treatment of sucker rods according to claim 1, wherein A second infusion pipe (8) is connected to the anticorrosive liquid tank (2). The second infusion pipe (8) is communicated with the upper brush cotton (17) through a first hose (9), and the second infusion pipe (8) is communicated with the lower brush cotton (16) through a second hose (10).

4. The surface treatment and anti-corrosion spraying device for sucker rods according to claim 3, wherein, A delivery pipe (25) is provided in the triangular plate (11). A number of communicating pipes (26) are provided on the side wall of the delivery pipe (25) close to the upper brush cotton (17). The number of communicating pipes (26) are distributed in a linear array. The communicating pipes (26) connect the upper brush cotton (17) with the delivery pipe (25). A top column (27) is provided in the communicating pipe (26). One end of the top column (27) extending into the delivery pipe (25) is connected with a plug cover plate (28). The plug cover plate (28) is connected with the inner wall of the delivery pipe (25) through a second return spring (29). The diameter of the top column (27) is smaller than the inner diameter value of the communicating pipe (26). When the upper brush cotton (17) is squeezed by the sucker rod, the corresponding top column (27) will move upward. The top column (27) will push up the plug cover plate (28), and the antiseptic liquid will enter the upper brush cotton (17) from the delivery pipe (25).

5. The surface treatment and anti-corrosion spraying device for sucker rods according to claim 1, characterized in that, The cross-section of the chute (21) is in an inverted T shape, and the cross-section of the slider (20) is also in an inverted T shape. A number of the brackets (7) are distributed in a linear array, and the brackets (7) are fixedly installed on the frame (1).

6. The anti-corrosion spraying device for the surface treatment of sucker rods according to claim 1, characterized in that, A liquid pump (3) is fixedly installed on the frame (1). The input end of the liquid pump (3) is connected with an antiseptic liquid tank (2). The output end of the liquid pump (3) is connected with a first infusion pipe (4). The first infusion pipe (4) is connected with a horizontal pipe (5). A number of the spray heads (6) are installed on the horizontal pipe (5).

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