Anti-corrosion spraying device for surface treatment of sucker rod

Abstract

The invention relates to the technical field of spraying, and provides a sucker rod surface treatment anti-corrosion spraying device which comprises a rack, an anti-corrosion liquid box, a horizontal pipe, a spraying head and a plurality of supports, a triangular plate is arranged above each support, the bottom face of each triangular plate is a horizontal plane, the top face of each triangular plate is an inclined plane, and a first linear driving element is installed on the rack; the telescopic end of the first linear driving element is connected with a sliding block, a sliding groove is formed in the top face of the triangular plate, the sliding block is connected with the sliding groove in a sliding fit mode, the sliding block is connected with the end face of the sliding groove through a first reset spring, the bottom face of the triangular plate is connected with upper brush cotton, the surface of the support is in an arc concave shape, and the surface of the support is connected with lower brush cotton. The preservative liquid box conveys preservative liquid into the lower brush cotton and the upper brush cotton through pipelines. During use, the upper brush cotton presses the sucker rod and pushes the sucker rod to rotate, the upper brush cotton and the lower brush cotton can brush the contact portion of the sucker rod and the support, and it is guaranteed that the sucker rod is subjected to all-around anti-corrosion spraying operation.

Description

Technical Field

[0001] The invention relates to the technical field of spraying, and in particular to an anti-corrosion spraying device for surface treatment of a sucker rod. Background Art

[0002] As a core component in oil production, the sucker rod has been in service for a long time in a downhole environment with high temperature, high pressure and high corrosion (such as containing hydrogen sulfide and chloride ions). Its surface anti-corrosion performance directly determines the service life and maintenance cost. In the traditional anti-corrosion spraying process, the sucker rod needs to be supported by a bracket + rotary spraying to achieve surface coating coverage, but due to the slenderness of the sucker rod (usually 16-30mm in diameter and up to 8-12m in length) and the easy bending and deformation characteristics, the following technical bottlenecks are caused: the existing process relies on multiple sets of brackets (such as arc brackets, V-shaped rollers, cantilever brackets) to fix the sucker rod, but the contact area between the bracket 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 shielding, forming an anti-corrosion blind area. This anti-corrosion blind area needs to be manually re-coated or sprayed twice, and the re-coating time of a single sucker rod accounts for up to 20%-30%, resulting in a decrease in overall processing efficiency. Therefore, it is necessary to provide a sucker rod surface treatment anti-corrosion spraying device to solve the above problems. Summary of the invention

[0003] The purpose of the present invention is to provide a pumping rod surface treatment anti-corrosion spraying device, aiming to solve the problems mentioned in the background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a sucker rod surface treatment anti-corrosion spray device, comprising a frame, an anti-corrosion liquid tank, a horizontal pipe, a nozzle and a plurality of brackets, a triangular plate is arranged above each of the brackets, the bottom surface of the triangular plate is a horizontal surface, and the top surface of the triangular plate is an inclined surface, a linear drive element 1 is installed on the frame, a slider is connected to the telescopic end of the linear drive element 1, a slide groove is arranged on the top surface of the triangular plate, the slider is slidably connected to the slide groove, the slider is connected to the end surface of the slide groove by a reset spring 1, an upper brush cotton is connected to the bottom surface of the triangular plate, the surface of the bracket is an arc concave, the surface of the bracket is connected to a lower brush cotton, and the anti-corrosion liquid tank transports the 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 of the triangular plates, and the L-shaped plate is composed of a vertical plate and a horizontal plate. The L-shaped plate is connected to the triangular plate through a connecting plate. A mounting plate is connected to the side of the triangular plate, and a linear drive element 2 is fixed on the mounting plate. When the telescopic end of the linear drive element 2 is extended to a set length, it will contact one end of the horizontal plate, and the linear drive element 2 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 second linear drive element, 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 located 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 2 is fully retracted, the telescopic end of the linear drive element 2 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 antiseptic 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 scheme of the present invention, a conveying pipe is arranged in the triangular plate, and a plurality of connecting pipes are arranged on the side wall of the conveying pipe close to the upper brush cotton. The plurality of connecting pipes are distributed in a linear array. The connecting pipe connects the upper brush cotton with the conveying pipe. A top column is arranged in the connecting pipe. One end of the top column extending into the conveying pipe is connected with a blocking cover plate. The blocking cover plate is connected to the inner wall of the conveying pipe by a reset spring. The diameter of the top column is smaller than the inner diameter value of the connecting pipe. When the upper brush cotton is squeezed by the sucker rod, the top column at the corresponding position will move upward, and the top column will lift the blocking cover plate, and the preservative liquid will enter the upper brush cotton from the conveying pipe.

[0010] As a further solution of the present invention, the cross section of the slide groove 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 mounted 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 anti-corrosion liquid tank, the output end of the liquid pump is connected to a first infusion tube, the first infusion tube is connected to a horizontal tube, and several of the nozzles are installed on the horizontal tube.

[0012] In summary, the beneficial effects of the present invention are: Through the setting of the triangle plate, linear drive element 1, lower brush cotton, upper brush cotton, slider, slide groove and return spring 1, the triangle plate will press the sucker rod downward, and the upper brush cotton will press the sucker rod and push the sucker rod to rotate, so that the nozzle can completely spray the side 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 fully sprayed with anti-corrosion without the need for re-coating, which greatly improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which: Figure 1 A schematic diagram of the structure of an anti-corrosion spraying device for surface treatment of a sucker rod according to an embodiment of the present invention Figure 1 .

[0014] Figure 2 A schematic diagram of the structure of an anti-corrosion spraying device for surface treatment of a sucker rod according to an embodiment of the present invention Figure 2 .

[0015] Figure 3 A schematic diagram of the structure of an anti-corrosion spraying device for surface treatment of a sucker rod according to an embodiment of the present invention Figure 3 .

[0016] Figure 4 The present invention is a schematic diagram of the connection of a triangular plate in an anti-corrosion spray device for surface treatment of a sucker rod according to an embodiment of the present invention.

[0017] Figure 5 for Figure 2 A local enlarged schematic diagram of point A in the middle.

[0018] Figure 6 The present invention is a schematic diagram of the connection between the upper brush cotton and the lower brush cotton in an anti-corrosion spray device for surface treatment of a sucker rod according to an embodiment of the present invention.

[0019] Figure 7 for Figure 6 A local enlarged schematic diagram of point B in the middle.

[0020] Figure markings: 1-frame, 2-anticorrosive liquid tank, 3-liquid pump, 4-first infusion tube, 5-horizontal tube, 6-nozzle, 7-bracket, 8-second infusion tube, 9-first hose, 10-second hose, 11-triangular plate, 12-linear drive element one, 13-L-shaped plate, 14-connecting plate, 15-heater, 16-lower brush cotton, 17-upper brush cotton, 18-mounting plate, 19-linear drive element two, 20-slider, 21-slide, 22-reset spring one, 23-groove, 24-heating wire, 25-delivery pipe, 26-connecting pipe, 27-top column, 28-blocking cover plate, 29-reset spring two. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention is further described in detail below 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.

[0022] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0023] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The embodiment of the present invention provides an anti-corrosion spraying device for surface treatment of sucker rods, 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, the output end of the liquid pump 3 is connected to a first liquid infusion tube 4, the first liquid infusion tube 4 is connected to the horizontal pipe 5, and a plurality of the nozzles 6 are mounted on the horizontal pipe 5. When the liquid pump 3 is started, the nozzle 6 can spray the anti-corrosion liquid. A triangle plate 11 is arranged above each of the brackets 7. Preferably, the triangle plate 11 is a right-angled triangle plate. The bottom surface of the triangle plate 11 is a horizontal surface, and the top surface of the triangle plate 11 is an inclined surface. A linear drive element 12 is installed on the frame 1. The telescopic end of the linear drive element 12 is fixedly connected with a slider 20. A slide groove 21 is arranged on the top surface of the triangle plate 11. The slider 20 is slidably connected with the slide groove 21. The end surface of the slider 20 and the slide groove 21 are connected by a reset spring 22. The cross-section of the slide groove 21 is in an inverted T shape, and the cross-section of the slider 20 is also in 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 triangle plate 11 is connected with an upper brush cotton 17. The surface of the bracket 7 is an arc concave shape. The surface of the bracket 7 is connected with a lower brush cotton 16. 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 treat the surface of the sucker rod, the linear drive element 12 will cause the triangular plate 11 to drop, 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 groove 21 and the inclined surface, the triangular plate 11 starts to move horizontally, 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-corrosive, efficient and convenient.

[0024] In the embodiment of the present invention, an L-shaped plate 13 is provided on one side of each triangular plate 11, and 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. The side of the triangular plate 11 is connected to a mounting plate 18, and a linear drive element 2 19 is fixed on the mounting plate 18. When the telescopic end of the linear drive element 2 19 is extended to a certain length, it will contact one end of the horizontal plate, and the linear drive element 2 19 and the L-shaped plate 13 form a U-shaped structure. By providing the L-shaped plate 13 and the linear drive element 2 19, the sucker rod sprayed with the anticorrosive liquid can be easily lifted. The linear drive element 2 19 and the linear drive element 1 12 are hydraulic cylinders, air cylinders or electric push rods.

[0025] In the embodiment of the present invention, a groove 23 is provided on the side of the L-shaped plate 13 close to the linear drive element 2 19, and a heating wire 24 is installed in the groove 23. A plurality of heaters 15 are fixedly installed on the frame 1, and the heaters 15 are located above the triangular plate 11. The high end of the triangular plate 11 is located directly above the bracket 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 bracket 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 drive element 2 19 is fully retracted, the telescopic end of the linear drive element 2 19 is not lower than the bottom surface of the triangular plate 11, so as to avoid the telescopic end of the linear drive element 2 19 from touching the sucker rod during the horizontal movement of the triangular plate 11. When the triangle 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, and finally the L-shaped plate 13 will semi-enclose the sucker rod, and the linear drive element 19 will be started so that the telescopic end of the linear drive element 19 will contact one end of the horizontal plate to fully surround the sucker rod, and then the heating wire 24 will be started to make the preservative liquid on the surface of the surrounded sucker rod dry quickly, and after the preservative liquid in this part is dried, the linear drive element 12 will be started to make the slider 20 move upward, and under the action of the L-shaped plate 13, the entire sucker rod will also move upward, and finally the heater 15 will be started to fully dry the preservative liquid on the surface of the sucker rod, which is very efficient.

[0026] See also Figures 1 to 7In the embodiment of the present invention, the antiseptic liquid tank 2 is connected with a second infusion tube 8, which is connected to the upper brush cotton 17 through the first hose 9, and is connected to the lower brush cotton 16 through the second hose 10. A delivery tube 25 is provided in the triangular plate 11, and the delivery tube 25 is arranged horizontally. A plurality of connecting tubes 26 are arranged on the side wall of the delivery tube 25 close to the upper brush cotton 17, and the plurality of connecting tubes 26 are distributed in a linear array. The connecting tube 26 connects the upper brush cotton 17 with the interior of the delivery tube 25. A top column 27 is provided in the connecting tube 26, and a plugging cover plate 28 is connected to one end of the top column 27 extending into the delivery tube 25. The plugging cover plate 28 is connected to the inner wall of the delivery tube 25 through a reset spring 29. The diameter of the top column 27 is smaller than the inner diameter of the connecting tube 26, and the antiseptic liquid can enter the upper brush cotton 17 through the gap between the top column 27 and the inner wall of the connecting tube 26. When the upper brush cotton 17 is squeezed by the sucker rod, the top column 27 at the corresponding position will move upward, and the top column 27 will lift the plugging cover 28, and the antiseptic liquid will enter the upper brush cotton 17 from the delivery pipe 25. When the top column 27 is not squeezed, under the action of the return spring 29, the plugging cover 28 and the end surface of the connecting pipe 26 are tightly fitted, and the connecting pipe 26 is blocked. Similarly, the position of the lower brush cotton 16 also has a similar structure, which will not be repeated here.

[0027] The working process of the embodiment of the present invention is: first, place the sucker rod on the bracket 7, and then start the linear drive element 12 and the liquid pump 3. The linear drive 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, and the triangular plate 11 begins to move horizontally. The upper brush cotton 17 presses the sucker rod and pushes the sucker rod to rotate, 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-corrosive. In addition, during the horizontal movement of the triangular plate 11, the L-shaped plate 13 will slowly approach the sucker rod, and finally the L-shaped plate 13 will form a semi-encirclement of the sucker rod, and the linear drive element 2 19 will be started to form a full encirclement of the sucker rod, and then the electric heating wire 24 will be started to make the anti-corrosion liquid on the surface of the surrounded sucker rod dry quickly. After the anti-corrosion liquid in this part is dried, the linear drive element 12 will be started to make the slider 20 move upward, and the sucker rod will also move upward. Finally, the heater 15 will be started to fully dry the anti-corrosion liquid on the surface of the sucker rod. After full drying, the processed sucker rod is removed, and under the action of the reset spring 1 22, the triangular plate 11 will be reset horizontally to facilitate the next operation.

[0028] For those skilled in the art, although several embodiments and examples of the present invention are 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 scope of the subject matter of the invention. These embodiments and their variations are included in the scope and subject matter of the invention, and are included in the invention described in the claims and the scope of their equivalents.

[0029] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A pump rod surface treatment anti-corrosion spraying device, 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: A triangular plate (11) is arranged above each of the brackets (7), 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 connected with a slider (20). A slide groove (21) is arranged on the top surface of the triangular plate (11), and the slider (20) is connected to the slide groove (21) in a sliding cooperation manner. The end surfaces of the slider (20) and the slide groove (21) are connected through a reset spring (22). The bottom surface of the triangular plate (11) is connected with an upper brush cotton (17). The surface of the bracket (7) is in an arc concave shape. The surface of the bracket (7) is connected with a lower brush cotton (16). The antiseptic liquid tank (2) transports the antiseptic liquid to the lower brush cotton (16) and the upper brush cotton (17) through a pipeline.

2. The anti-corrosion spraying device for surface treatment of sucker rod according to claim 1, characterized in that: An L-shaped plate (13) is arranged on one side of each triangular plate (11), the L-shaped plate (13) being composed of a vertical plate and a horizontal plate, the L-shaped plate (13) being connected to the triangular plate (11) via a connecting plate (14), a mounting plate (18) being connected to the side of the triangular plate (11), a linear drive element 2 (19) being fixed on the mounting plate (18), when the telescopic end of the linear drive element 2 (19) is extended to a set length, it will contact one end of the horizontal plate, and the linear drive element 2 (19) and the L-shaped plate (13) form a U-shaped structure.

3. The anti-corrosion spraying device for surface treatment of sucker rod according to claim 2, characterized in that: A groove (23) is provided on the side of the L-shaped plate (13) close to the second linear drive element (19), and a heating wire (24) is installed in the groove (23). A plurality of heaters (15) are fixedly installed on the frame (1), and the heaters (15) are located above the triangular plate (11). The high end of the triangular plate (11) is located directly above the bracket (7), and the L-shaped plate (13) is arranged at the low end of the triangular plate (11).

4. The anti-corrosion spraying device for surface treatment of sucker rod according to claim 2, 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 2 (19) is fully retracted, the telescopic end of the linear drive element 2 (19) is not lower than the bottom surface of the triangular plate (11).

5. The anti-corrosion spraying device for surface treatment of sucker rod according to claim 1, characterized in that: The antiseptic liquid tank (2) is connected to a second infusion tube (8), the second infusion tube (8) is connected to the upper brush cotton (17) through a first hose (9), and the second infusion tube (8) is connected to the lower brush cotton (16) through a second hose (10).

6. The anti-corrosion spraying device for surface treatment of sucker rod according to claim 5, characterized in that: The triangle plate (11) is provided with a delivery pipe (25), and a plurality of connecting pipes (26) are provided on the side wall of the delivery pipe (25) near the upper brush cotton (17). The plurality of connecting pipes (26) are distributed in a linear array. The connecting pipe (26) connects the upper brush cotton (17) with the delivery pipe (25). A top column (27) is provided in the connecting pipe (26). One end of the top column (27) extending into the delivery pipe (25) is connected with a blocking cover plate (28). The blocking cover plate (28) is connected to 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 of the connecting pipe (26). When the upper brush cotton (17) is squeezed by the sucker rod, the top column (27) at the corresponding position moves upward, and the top column (27) lifts the blocking cover plate (28), so that the antiseptic liquid enters the upper brush cotton (17) from the delivery pipe (25).

7. The anti-corrosion spraying device for surface treatment of sucker rod according to claim 1, characterized in that: The cross section of the slide groove (21) is in an inverted T shape, and the cross section of the slider (20) is also in an inverted T shape; a plurality of the brackets (7) are distributed in a linear array, and the brackets (7) are fixedly mounted on the frame (1).

8. The anti-corrosion spraying device for surface treatment of sucker rod according to claim 1, characterized in that: A liquid pump (3) is fixedly mounted on the frame (1); the input end of the liquid pump (3) is connected to the antiseptic liquid tank (2); the output end of the liquid pump (3) is connected to a first liquid infusion tube (4); the first liquid infusion tube (4) is connected to a horizontal tube (5); and a plurality of nozzles (6) are mounted on the horizontal tube (5).

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