Automatic sand blasting device for outer surface of pipeline

Abstract

The application relates to the field of pipeline processing, and relates to an automatic sand blasting device for the outer surface of a pipeline. The device comprises a movable frame, a driving mechanism and a sand blasting mechanism. The movable frame supports the movable frame on the outer surface of the pipeline. The driving mechanism is connected to the movable frame and drives the movable frame to move along the outer surface of the pipeline when the driving mechanism is driven. The sand blasting mechanism is connected to the movable frame and is used for sand blasting operation on the outer surface of the pipeline. The device directly sets and supports the movable frame on the outer surface of the pipeline. The rollers in the driving mechanism contact the pipeline and drive the movable frame to automatically move along the pipeline. The sand blasting mechanism can continuously move for sand blasting operation. The device avoids the complicated operation of repeatedly disassembling and reassembling the equipment by manual work. The continuous processing range of long pipelines is significantly expanded. The device not only improves the work efficiency and reduces the labor intensity of workers, but also effectively reduces the safety risks of dust inhalation and mechanical injury and reduces the environmental pollution caused by on-site dust.

Description

Technical Field

[0001] This application relates to the field of pipeline treatment, and specifically to an automatic sandblasting device for the outer surface of a pipeline. Background Technology

[0002] In metal pipeline corrosion protection projects, ensuring the cleanliness of the pipeline surface is a crucial step in preventing corrosion. A common method is to first perform sandblasting to remove rust, followed by the application of anti-corrosion paint. For new pipelines not yet laid, efficient operation can usually be achieved using fixed sandblasting equipment in a dedicated sandblasting room. This method is fast, produces minimal environmental pollution, and effectively ensures coating adhesion. However, for pipelines already installed in the field or in complex environments, due to their varying specifications, wide distribution, and fixed locations that are difficult to move, automated equipment is difficult to apply. Currently, most pipelines rely on manual open-field sandblasting or manual grinding for rust removal. This type of manual operation is not only slow but also leads to high labor intensity and safety risks for workers (such as dust inhalation and mechanical injuries), while generating a large amount of dust, causing serious pollution to the surrounding environment.

[0003] In the prior art, some patented solutions attempt to address the aforementioned problems, such as the compact pipe sandblasting device (application number CN201910249034) and the preheating sandblasting equipment (application number CN201710113284). These solutions achieve circumferential rotation and short-distance axial movement by fixing the device to the pipe, thus improving the level of automation to some extent. However, these solutions still have significant shortcomings: the device's movement range is limited to its own frame. Once the work area exceeds this range (such as the continuous processing of long pipes), the work must be stopped, and the equipment must be manually disassembled and reinstalled. This not only slows down the overall progress but also increases the burden on operators. In addition, its rotation and walking mechanisms rely on complex gear or roller drive systems, resulting in large equipment size and heavy weight. On-site handling and installation become time-consuming and labor-intensive, reducing portability and actual construction efficiency, and failing to truly solve the core pain points in the anti-corrosion work of laid pipelines. Utility Model Content

[0004] To solve, or at least partially solve, the above-mentioned technical problems, this application provides an automatic sandblasting device for the outer surface of a pipe, comprising: A movable frame is used to be fitted onto the outer surface of a pipe, with the inner side of the movable frame in contact with the outer surface of the pipe to support the movable frame on the outer surface of the pipe. A drive mechanism is connected to the movable frame and includes rollers for contacting the outer surface of the pipe and driving the movable frame to move along the outer surface of the pipe during driving. A sandblasting mechanism, connected to the movable frame, is used to follow the movable frame along the outer surface of the pipe to perform sandblasting operations on the outer surface of the pipe.

[0005] Optionally, the activity framework includes: Framework body; A positioning mechanism is connected to the frame body, the positioning mechanism extends to the inside of the frame body, and is movable relative to the frame body to contact the outer surface of the pipe, so as to support the frame body on the outer surface of the pipe.

[0006] Optionally, the positioning mechanism includes: Several caster wheel assemblies are arranged in a ring on the inner side of the frame body for contacting the outer surface of the pipe. Each caster wheel assembly is connected to the frame body via a radial slide rail. Several clamping components, one end of which is fixedly connected to the frame body and the other end of which is connected to the caster wheel assembly; The clamping assembly and the radial slide rail are respectively arranged radially along the pipe. The clamping assembly is squeezed when the caster assembly abuts against the outer surface of the pipe to press the caster assembly against the outer surface of the pipe.

[0007] Optionally, the clamping assembly includes: The elastic telescopic rod is fixedly connected to the frame body at one end and connected to a movable bracket at the other end. The elastic telescopic rod is staggered from the radial slide rail. The movable bracket connects at least two of the aforementioned caster wheel assemblies.

[0008] Optionally, the drive mechanism and the sandblasting mechanism are respectively fixedly connected to the movable bracket to move with the movable bracket.

[0009] Optionally, the frame body includes a first frame and a second frame, which are respectively arc-shaped; One end of the first frame is connected to one end of the second frame via a first pivot, and the first frame and the second frame can rotate around the first pivot. The first frame and the second frame can open or close to surround the pipe. The first frame and the second frame are respectively provided with locking members, which are used to lock the first frame and the second frame in a closed state.

[0010] Optionally, the sandblasting mechanisms are respectively installed on the first frame and the second frame, and the two sandblasting mechanisms are arranged opposite to each other.

[0011] Optionally, a plurality of drive mechanisms are provided and arranged in a ring on the inner side of the movable frame; Each of the drive mechanisms includes: Mounting base, connected to the movable frame, and the rollers mounted on the mounting base; A drive assembly is connected to the mounting base and is connected to the roller for driving the roller to rotate.

[0012] Optionally, the mounting base includes a fixed base and a swing arm; The fixed base is fixed relative to the movable frame, the swing arm is rotatably connected to the fixed base via a second rotating shaft, and the roller is mounted on the swing arm; The drive mechanism also includes an electric push rod, one end of which is connected to the fixed base and the other end of which is connected to the swing arm; the electric push rod is used to push the swing arm to rotate relative to the fixed base around the second rotating axis, so that the roller contacts or disengages from the outer surface of the pipe.

[0013] Optionally, the roller includes a first roller and a second roller; The axis of one of the first roller and the second roller is arranged radially along the pipe, and the other is arranged along the extension direction of the pipe; As the swing arm rotates, the first roller and the second roller alternately contact the outer surface of the pipe.

[0014] The automatic sandblasting device for the outer surface of pipelines provided in this application directly mounts and supports a movable frame on the outer surface of the pipeline. Rollers in the drive mechanism are in close contact with the outer surface of the pipeline, and during operation, the movable frame moves automatically along the pipeline, while the sandblasting mechanism moves accordingly to perform the sandblasting operation. This enables continuous processing on long pipelines. Unlike existing methods, this eliminates the need for repeated pauses, manual disassembly, and reinstallation, effectively solving the inefficiency problem caused by the wide distribution and difficulty in moving existing pipelines, and significantly accelerating the construction progress. Simultaneously, workers only need to start the equipment and monitor its operation, eliminating the need for prolonged high-intensity labor such as open-air sandblasting or manual grinding, greatly reducing physical burden and significantly lowering the safety risks of dust inhalation and mechanical injury. Furthermore, because the sandblasting process is completed enclosed within the movable frame, on-site dust is greatly reduced, significantly improving the surrounding air quality and construction environment in complex environments. Overall, this device not only improves the efficiency and reliability of anti-corrosion operations but also makes operation simpler, safer, and more environmentally friendly. Attached Figure Description

[0015] To more clearly illustrate the embodiments of this application, the relevant drawings will be briefly described below. It is understood that the drawings described below are only for illustrating some embodiments of this application, and those skilled in the art can obtain many other technical features and connections not mentioned herein based on these drawings.

[0016] Figure 1This is a schematic diagram of the overall structure of the automatic sandblasting device for the outer surface of the pipeline in this application; Figure 2 This is a schematic diagram of the movable frame of the automatic sandblasting device for the outer surface of the pipe in this application; Figure 3 This is a partial structural schematic diagram of the automatic sandblasting device for the outer surface of the pipeline in this application; Figure 4 This is a schematic diagram of the drive mechanism of the automatic sandblasting device for the outer surface of the pipeline in this application.

[0017] Explanation of reference numerals in the attached figures: 1. Movable frame; 11. First frame; 12. Second frame; 13. First pivot; 14. Locking element; 15. Caster wheel assembly; 16. Radial slide rail; 17. Elastic telescopic rod; 18. Movable bracket; 2. Drive mechanism; 21. Drive motor; 22. Gearbox; 23. First roller; 24. Second roller; 25. Motor mounting base; 26. Second shaft; 27. Fixed base; 28. Electric push rod; 29. ​​Swing arm; 3. Sandblasting mechanism; 4. Pipes. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0021] The technical solutions in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0022] This embodiment provides an automatic sandblasting device for the outer surface of a pipe, such as... Figure 1 As shown, the device includes a movable frame 1, inside which a drive mechanism 2 and a sandblasting mechanism 3 are installed. The movable frame 1 is installed on the pipe 4 as a whole. Driven by the drive mechanism 2, it can move along the axial and circumferential directions of the pipe 4, thereby driving the sandblasting mechanism 3 to perform sandblasting treatment on the surface of the pipe 4.

[0023] A movable frame 1 is fitted onto the outer surface of the pipe 4, with its inner side contacting the outer surface of the pipe 4 to support it. A drive mechanism 2 is connected to the movable frame 1 and includes at least rollers. The rollers contact the outer surface of the pipe 4 and drive the movable frame 1 along the outer surface of the pipe 4 during operation. A sandblasting mechanism 3 is connected to the movable frame 1 and follows its movement along the outer surface of the pipe 4 to perform sandblasting on the outer surface of the pipe 4.

[0024] In this embodiment, the movable frame 1 is directly fitted onto and supported on the outer surface of the pipe 4. The rollers in the drive mechanism 2 are in close contact with the outer surface of the pipe 4 to drive the movable frame 1 to move automatically, so that the sandblasting mechanism 3 can move continuously. This avoids the tedious operation of repeatedly disassembling and reassembling the equipment manually, significantly expands the continuous processing range of the long pipe 4, not only improves the efficiency of anti-corrosion operation and reduces the labor intensity of workers, but also effectively reduces the safety risks of dust inhalation and mechanical injury, and reduces the pollution of the environment by dust on site.

[0025] Furthermore, in this embodiment, the movable frame 1 includes a frame body and a positioning mechanism; the positioning mechanism is connected to the frame body, extends to the inner side of the frame body, and is movable relative to the frame body to contact the outer surface of the pipe 4, so as to support the frame body on the outer surface of the pipe 4.

[0026] The positioning mechanism is designed to adapt the frame to pipes of different diameters, ensuring stable attachment of the equipment and avoiding support failure caused by differences in pipe specifications during operation, thereby improving the versatility and reliability of the device.

[0027] In one embodiment, the positioning mechanism includes a plurality of caster wheel assemblies 15 and a plurality of clamping assemblies. The caster wheel assemblies 15 are arranged in a ring inside the frame body for contacting the outer surface of the pipe 4. Each caster wheel assembly 15 is connected to the frame body via a radial slide rail 16. One end of each clamping assembly is fixedly connected to the frame body, and the other end is connected to the caster wheel assembly 15. The clamping assemblies and the radial slide rails 16 are respectively arranged radially along the pipe 4. The clamping assemblies are squeezed when the caster wheel assemblies 15 abut against the outer surface of the pipe 4 to press the caster wheel assemblies 15 firmly against the outer surface of the pipe 4.

[0028] In this embodiment, the clamping assembly, specifically the caster assembly 15, abuts against the pipe 4, and can adapt to the operational needs of pipes 4 with varying diameters. The mating structure between the caster assembly 15 and the clamping assembly achieves a flexible fit to the surface of the pipe 4, ensuring smooth movement of the movable frame 1 while avoiding equipment vibration or displacement caused by rigid contact, effectively improving the uniformity and stability of continuous sandblasting operations on long pipes 4.

[0029] like Figure 2 and Figure 3 As shown, specifically, the clamping assembly includes an elastic telescopic rod 17 and a movable bracket 18. The elastic telescopic rod 17 is arranged radially along the pipe 4 and is also staggered from the radial slide rail 16. One end of the elastic telescopic rod 17 is fixedly connected to the frame body, and the other end is connected to the movable bracket 18. The end of the movable bracket 18 is connected to the universal wheel assembly 15. The elastic telescopic rod 17 enables the adjustment of the position of the universal wheel assembly 15 along the pipe 4 radially, and the length can be adjusted according to the extension and retraction of the universal wheel assembly 15.

[0030] In this embodiment, the movable support 18 can be understood as a synchronous support. The movable support 18 connects at least two caster wheel assemblies 15. Since the caster wheel assemblies 15 are arranged around the periphery of the pipe 4, the movable support 18 connects at least two caster wheel assemblies 15, realizing the synchronous movement of multiple caster wheel assemblies 15. In this way, when one caster wheel assembly 15 moves radially along the pipe 4, the other caster wheel assemblies 15 also move accordingly, improving the flexibility of the movable frame 1 and its adaptability to different pipes 4.

[0031] In this embodiment, the universal wheel assembly 15, the drive mechanism 2 and the sandblasting mechanism 3 are connected by the movable bracket 18, so that they can move synchronously along the radial slide rail 16 and adaptively clamp the pipe 4 under the pressure of the elastic telescopic rod 17.

[0032] The combined design of the elastic telescopic rod 17 and the movable bracket 18 enhances the dynamic adaptability of the positioning mechanism, enabling the caster wheel assembly 15 to automatically adjust the contact pressure according to the curvature change of the pipe 4, avoiding frame shaking caused by local stress concentration, and further ensuring the continuity of sandblasting operations and surface treatment quality.

[0033] In one embodiment, the elastic telescopic rod 17 may be a spring, or a pneumatic or hydraulic telescopic mechanism, to adjust the position of the caster wheel assembly 15 manually or automatically.

[0034] Optionally, the drive mechanism 2 and the sandblasting mechanism 3 are fixedly connected to the movable bracket 18 to move with the movable bracket 18. This integrated layout enables the drive and sandblasting components to move in tandem, reducing energy loss in the transmission links, improving the synchronization of equipment operation, simplifying the structure and improving the overall efficiency of long pipeline operations.

[0035] like Figure 2 and Figure 3 As shown, in this embodiment, the frame body includes a first frame 11 and a second frame 12 that are respectively arc-shaped; the first frame 11 and the second frame 12 can be two arc-shaped plates, which are connected by a connecting rod to form a frame structure. The positioning mechanism, the driving mechanism 2 and the sandblasting mechanism 3 mentioned above are respectively disposed inside the frame.

[0036] One end of the first frame 11 is connected to one end of the second frame 12 via a first pivot 13. The first frame 11 and the second frame 12 can rotate around the first pivot 13 and can open or close to surround the pipe 4. Locking elements 14 are respectively provided on the first frame 11 and the second frame 12, which are used to lock the closed state of the first frame 11 and the second frame 12.

[0037] In other words, a first pivot 13 is installed on the top of the movable frame 1. The first frame 11 and the second frame 12 serve as the left and right halves of the movable frame 1, respectively, and the left and right halves of the movable frame 1 can open and close along the first pivot 13. The caster wheel assembly 15, the radial slide rail 16, the elastic telescopic rod 17, and the movable bracket 18 are all installed inside the first frame 11 and the second frame 12. The caster wheel assembly 15 is installed on the radial slide rail 16 and can slide along the radial slide rail 16. The movable bracket 18 connects multiple sets of caster wheel assemblies 15 and elastic telescopic rods 17. Under the pressure of the elastic telescopic rods 17, the multiple sets of caster wheel assemblies 15 press the pipe 4 inward along the radial slide rail 16. The locking member 14 is installed on the side of the movable frame 1 opposite to the first pivot 13 and can lock the left and right halves of the movable frame 1.

[0038] This split-frame structure enables rapid installation and disassembly, solving the problem of difficult equipment placement in complex environments and significantly shortening auxiliary operation time. At the same time, the locking element 14 ensures a rigid connection after closure, avoiding the risk of frame loosening caused by sandblasting vibration.

[0039] In this embodiment, the sandblasting mechanisms 3 are respectively mounted on the first frame 11 and the second frame 12, with the two sandblasting mechanisms 3 arranged opposite each other. The two sandblasting mechanisms 3 and several drive mechanisms 2 are all mounted on the radial slide rail 16 or the movable bracket 18, and together with the caster wheel assembly 15, move synchronously towards the center under the pressure of the elastic telescopic rod 17. This symmetrically arranged dual sandblasting mechanism 3 can simultaneously cover the circumferential surface of the pipe 4, achieving uniform and efficient rust removal, avoiding the blind spots caused by traditional single-sided sandblasting, and improving the adhesion consistency of the anti-corrosion coating.

[0040] In this embodiment, several drive mechanisms 2 are provided and arranged in a ring inside the first frame 11 and the second frame 12. Each drive mechanism 2 includes a mounting base and a drive assembly. The mounting base is connected to the first frame 11 and the second frame 12, and a roller is mounted on the mounting base. The drive assembly is connected to the mounting base and to the roller, and is used to drive the roller to rotate.

[0041] The drive assembly includes a drive motor 21 and a gearbox 22. The drive motor 21 and the gearbox 22 are respectively mounted on the motor mounting base 25. The drive motor 21 can be remotely controlled by an external controller. The drive motor 21 and the gearbox 22 are used to drive the roller to rotate, so that the device moves along the surface of the pipe 4.

[0042] The ring-shaped multi-drive mechanism 2 provides balanced driving force, solves the problem of slippage caused by single-point drive, ensures that the movable frame 1 moves smoothly and continuously on the long pipeline, and effectively expands the coverage of a single operation.

[0043] like Figure 4 As shown, specifically, the mounting base includes a fixed base 27 and a swing arm 29. The fixed base 27 is fixed relative to the movable frame 1, and the swing arm 29 is rotatably connected to the fixed base 27 via a second rotating shaft 26. One end of the swing arm 29 is connected to a motor mounting base 25, and a roller is mounted on the swing arm 29 or the motor mounting base 25. The drive mechanism 2 also includes an electric push rod 28, one end of which is connected to the fixed base 27, and the other end is connected to the swing arm 29. The electric push rod 28 is used to push the swing arm 29 to rotate relative to the fixed base 27 around the second rotating shaft 26, so that the roller contacts or disengages from the outer surface of the pipe 4.

[0044] The adjustment mechanism of the swing arm 29 and the electric push rod 28 enables the roller to actively engage with or disengage from the pipe 4, solving the problem of motion interference when the equipment crosses the pipe fitting 4 or obstacles, avoiding work interruptions caused by manual intervention, and significantly improving adaptability to complex field conditions.

[0045] Furthermore, such as Figure 4 As shown, the rollers include a first roller 23 and a second roller 24; the axis of one of the first roller 23 and the second roller 24 is arranged radially along the pipe 4, and the other is arranged along the extension direction of the pipe 4. Under the rotation of the swing arm 29, the first roller 23 and the second roller 24 alternately contact the outer surface of the pipe 4.

[0046] In other words, the first roller 23 and the second roller 24 of the drive mechanism 2 can be a circumferential roller and an axial roller, respectively. Driven by the electric push rod 28, the drive motor 21, the reduction gearbox 22, and the first roller 23 and the second roller 24 as a whole can rotate along the second rotating shaft 26 to control the circumferential roller or the axial roller to press the surface of the pipe 4.

[0047] For example, when rotated to one side, the circumferential rollers press against the surface of pipe 4, and the entire device moves along the circumferential direction of pipe 4 to achieve circumferential sandblasting of pipe 4; when rotated to the other side, the axial rollers press against the surface of pipe 4, and the entire device moves along the axial direction of pipe 4 to achieve axial sandblasting of pipe 4. In this way, the drive component drives the entire sandblasting device to move along the axial and circumferential directions of pipe 4 through the rollers, thereby driving the sandblasting mechanism 3 to move and complete the sandblasting work on the surface of pipe 4. This is particularly suitable for automated sandblasting operations on long pipes.

[0048] The dual-roller alternating contact design optimizes the travel trajectory, enabling axial movement via the radial roller and circumferential adjustment via the extended directional roller. This effectively avoids path deviation caused by the traditional single drive direction, ensuring a uniform treatment effect on the sandblasted surface.

[0049] In some embodiments, a steering mechanism can be provided for the roller to control the direction of the roller. In this way, the direction of the roller can be adjusted arbitrarily, including radial and axial movement, and the roller can also move in a spiral along the surface of the pipe 4, further improving the work efficiency.

[0050] The specific workflow of this embodiment is as follows: During operation, the elastic telescopic rod 17 is opened, and the first frame 11 and the second frame 12 open along the first rotating shaft 13, allowing the sandblasting device to be installed on the pipe 4 as a whole.

[0051] During the closing process of the first frame 11 and the second frame 12, the caster wheel assembly 15 contacts the surface of the pipe 4. As the closing continues, the caster wheel assembly 15 compresses the spring of the elastic telescopic rod 17 through the movable bracket 18 until the frame is fully closed.

[0052] Multiple sets of caster wheel assemblies 15 are arranged symmetrically along the circumference to ensure that the preload of each set of casters is average. Within the elastic range of the elastic telescopic rod 17, it can automatically adapt to different pipe diameters, and the adaptability range can be increased by replacing the spring.

[0053] The movable bracket 18 connects the sandblasting mechanism 3 and the drive mechanism 2 together. When the universal wheel contacts the surface of the pipe 4 and moves outward radially, the sandblasting mechanism 3 and the drive mechanism 2 move outward synchronously.

[0054] After being fully closed, the elastic telescopic rod 17 is locked. Under the pressure of the spring, the caster assembly 15 and the drive mechanism 2 are pressed against the surface of the pipe 4. The sandblasting mechanism 3 faces the surface of the pipe 4 and is fixed relative to the surface of the pipe 4.

[0055] In control mode, when the electric push rod 28 extends, it drives the motor mounting base 25 to rotate clockwise along the second rotating shaft 26 via the swing arm 29, causing the circumferential roller (first roller 23) to contact the surface of the pipe 4, while the axial roller (second roller 24) is suspended in the air. At this time, the drive motor 21 drives the circumferential roller to rotate the entire sandblasting device circumferentially along the pipe 4. When the electric push rod 28 retracts, it drives the motor mounting base 25 to rotate counterclockwise along the second rotating shaft 26 via the swing arm 29, causing the axial roller to contact the surface of the pipe 4, while the circumferential roller is suspended in the air. At this time, the drive motor 21 drives the axial roller to move the entire sandblasting device axially along the pipe.

[0056] By controlling the electric push rod 28, the device can switch between rotation and walking states, and a single drive motor 21 is used to drive both dimensions.

[0057] The sandblasting mechanism 3 is arranged in opposite directions. It can complete the circular sandblasting of the pipeline 4 by rotating 180 degrees with the sandblasting device. Then, it switches the motion state and the sandblasting device moves forward. The distance traveled is equal to the effective cleaning width of the sandblasting component. It rotates again to perform the sandblasting operation. This process is repeated to complete the automatic sandblasting operation of long-distance pipelines.

[0058] In summary, this embodiment, through its structural design where the movable frame 1 directly supports the outer surface of the pipe 4, combined with the continuous movement mechanism driven by rollers and the adaptive fitting capability of the positioning mechanism, systematically solves the core problems of low efficiency due to repeated disassembly and installation, high safety risks of manual operation, and serious environmental pollution in the prior art. Its split frame and ring-driven layout significantly improve the equipment's portability and operational continuity, while the dual sandblasting mechanism 3 and the alternating dual roller mechanism further ensure the uniformity and reliability of surface treatment, ultimately achieving comprehensive optimization of anti-corrosion operation efficiency, operational safety, and environmental performance.

[0059] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0060] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An automatic sandblasting device for the outer surface of a pipe, characterized in that, include: A movable frame (1) is used to be fitted onto the outer surface of the pipe (4). The inner side of the movable frame (1) is in contact with the outer surface of the pipe (4) to support the movable frame (1) on the outer surface of the pipe (4). The drive mechanism (2) is connected to the movable frame (1) and includes rollers for contacting the outer surface of the pipe (4) and driving the movable frame (1) to move along the outer surface of the pipe (4) during driving. The sandblasting mechanism (3) is connected to the movable frame (1) and is used to follow the movable frame (1) along the outer surface of the pipe (4) to perform sandblasting on the outer surface of the pipe (4).

2. The automatic sandblasting device for the outer surface of a pipe according to claim 1, characterized in that, The activity framework (1) includes: Framework body; A positioning mechanism is connected to the frame body, the positioning mechanism extends to the inside of the frame body, and is movable relative to the frame body to contact the outer surface of the pipe (4) so ​​as to support the frame body on the outer surface of the pipe (4).

3. The automatic sandblasting device for the outer surface of a pipe according to claim 2, characterized in that, The positioning mechanism includes: Several caster wheel assemblies (15) are arranged in a ring on the inner side of the frame body for contacting the outer surface of the pipe (4). Each caster wheel assembly (15) is connected to the frame body by a radial slide rail (16). Several clamping components, one end of which is fixedly connected to the frame body and the other end is connected to the caster wheel assembly (15). The clamping assembly and the radial slide rail (16) are respectively arranged radially along the pipe (4). The clamping assembly is squeezed when the universal wheel assembly (15) abuts against the outer surface of the pipe (4) to press the universal wheel assembly (15) against the outer surface of the pipe (4).

4. The automatic sandblasting device for the outer surface of a pipe according to claim 3, characterized in that, The clamping assembly includes: The elastic telescopic rod (17) is fixedly connected to the frame body at one end and connected to a movable bracket (18) at the other end. The elastic telescopic rod (17) is staggered from the radial slide rail (16). The movable bracket (18) connects at least two of the said caster wheel assemblies (15).

5. The automatic sandblasting device for the outer surface of a pipe according to claim 4, characterized in that, The drive mechanism (2) and the sandblasting mechanism (3) are respectively fixedly connected to the movable bracket (18) to follow the movement of the movable bracket (18).

6. The automatic sandblasting device for the outer surface of a pipe according to claim 2, characterized in that, The frame body includes a first frame (11) and a second frame (12) that are respectively arc-shaped. One end of the first frame (11) is connected to one end of the second frame (12) via a first pivot (13) and rotates around the first pivot (13). The first frame (11) and the second frame (12) can open or close to surround the pipe (4). The first frame (11) and the second frame (12) are respectively provided with locking members (14), which are used to lock the closed state of the first frame (11) and the second frame (12).

7. The automatic sandblasting device for the outer surface of a pipe according to claim 6, characterized in that, The sandblasting mechanisms (3) are respectively installed on the first frame (11) and the second frame (12), and the two sandblasting mechanisms (3) are arranged opposite to each other.

8. The automatic sandblasting device for the outer surface of a pipe according to any one of claims 1 to 7, characterized in that, The drive mechanism (2) is provided in several parts and arranged in a ring on the inner side of the movable frame (1); Each of the drive mechanisms (2) includes: Mounting base, connected to the movable frame (1), and the rollers are mounted on the mounting base; A drive assembly is connected to the mounting base and is connected to the roller for driving the roller to rotate.

9. The automatic sandblasting device for the outer surface of a pipe according to claim 8, characterized in that, The mounting base includes a fixed base (27) and a swing arm (29); The fixed base (27) is fixed relative to the movable frame (1), the swing arm (29) is rotatably connected to the fixed base (27) through the second rotating shaft (26), and the roller is installed on the swing arm (29). The drive mechanism (2) further includes an electric push rod (28), one end of which is connected to the fixed base (27) and the other end is connected to the swing arm (29). The electric push rod (28) is used to push the swing arm (29) to rotate relative to the fixed base (27) around the second rotating shaft (26) so that the roller contacts or disengages from the outer surface of the pipe (4).

10. The automatic sandblasting device for the outer surface of a pipe according to claim 9, characterized in that, The rollers include a first roller (23) and a second roller (24); The axis of one of the first roller (23) and the second roller (24) is arranged radially along the pipe (4), and the other is arranged along the extension direction of the pipe (4); As the swing arm (29) rotates, the first roller (23) and the second roller (24) alternately contact the outer surface of the pipe (4).

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