A sandblasting device

Abstract

This utility model relates to the technical field of sandblasting equipment, specifically to a sandblasting device. The sandblasting device includes a sandblasting gun, a sandblasting robot, a connecting arm, a displacement drive assembly, and an angle adjustment assembly. The displacement drive assembly is disposed on the sandblasting robot and connected to the sandblasting gun via the connecting arm. The displacement drive assembly drives the sandblasting gun to move. The angle adjustment assembly is disposed at the end of the connecting arm near the sandblasting gun and connected to the sandblasting gun. The angle adjustment assembly drives the sandblasting gun to rotate in a vertical circumferential direction. This utility model improves the sandblasting efficiency of sandblasting guns on large-area surfaces and objects of different shapes.

Description

Technical Field

[0001] This utility model relates to the technical field of sandblasting equipment, and more specifically, to a sandblasting device. Background Technology

[0002] A sandblasting gun uses compressed air to create a high-speed jet of abrasive material (such as copper ore sand, quartz sand, iron sand, sea sand, and corundum) that is propelled at high speed onto the surface of a workpiece. This alters the workpiece's surface appearance. Due to the impact and cutting action of the abrasive on the workpiece surface, it achieves a certain level of cleanliness and varying roughness, thereby improving the workpiece's mechanical properties. Therefore, sandblasting guns are commonly used to remove stains from object surfaces, perform sandblasting, polishing, or create a uniform, finely textured surface on workpieces.

[0003] Currently, sandblasting guns are typically limited by hand-held operation, resulting in a small working area, generally limited to straight lines or small-scale curved surfaces. Sandblasting efficiency is low for larger areas and surfaces of varying shapes. Furthermore, on uneven surfaces, rebounding sand and dust generated during sandblasting can easily escape from the gaps between the sandblasting gun and the surface, polluting the environment and impacting the health and well-being of operators. Utility Model Content

[0004] To improve the sandblasting efficiency of sandblasting guns on large-area and differently shaped object surfaces, this utility model provides a sandblasting device. The sandblasting device in this utility model adopts the following technical solution:

[0005] A sandblasting device includes a sandblasting gun, a sandblasting robot, a connecting arm, a displacement drive assembly, and an angle adjustment assembly. The displacement drive assembly is disposed on the sandblasting robot and connected to the sandblasting gun via the connecting arm. The displacement drive assembly is used to drive the sandblasting gun to move. The angle adjustment assembly is disposed at one end of the connecting arm near the sandblasting gun and connected to the sandblasting gun. The angle adjustment assembly is used to adjust the sandblasting angle of the sandblasting gun.

[0006] Optionally, the displacement driving assembly includes a displacement driving component and a first rotating shaft. The first rotating shaft is connected to the displacement driving component and the connecting arm, respectively. The displacement driving component is used to drive the first rotating shaft to rotate, so as to drive the connecting arm and the sandblasting gun to rotate around the first rotating shaft in a circumferential direction in the horizontal plane.

[0007] Optionally, the displacement drive assembly includes a ball joint support, which is connected to the connecting arm.

[0008] Optionally, the angle adjustment assembly includes an angle adjustment drive and a rotating fixing member. The rotating fixing member is rotatably connected to the connecting arm and connected to the sandblasting gun. The angle adjustment drive is used to drive the rotating fixing member to rotate relative to the connecting arm, so as to drive the sandblasting gun to rotate around the end of the connecting arm in a circumferential direction in a vertical plane.

[0009] Optionally, the sandblasting device further includes a roughness detector, which is used to detect the roughness of the object surface after sandblasting. The roughness detector is connected to the rotating fixing member, which is used to drive the sandblasting gun and the roughness detector to rotate simultaneously along the vertical circumference by rotating itself.

[0010] Optionally, the sandblasting gun includes a sandblasting pipe and a return sand pipe. The sandblasting gun has a sandblasting chamber inside, which is connected to the sandblasting pipe and the return sand pipe respectively. The bottom of the sandblasting gun is provided with an opening, and the end of the sandblasting pipe is provided with a sandblasting nozzle. The sandblasting nozzle is located in the sandblasting chamber and extends toward the opening of the sandblasting gun. The inner diameter of the sandblasting pipe gradually increases from the end away from the opening to the end closer to the opening.

[0011] Optionally, the end of the sandblasting gun is provided with a baffle portion, which is distributed circumferentially along the opening of the sandblasting gun.

[0012] Optionally, the sandblasting device further includes a separation cylinder, a sand supply tank, and a dust collector. The separation cylinder is connected to the sandblasting chamber through the sand return pipe. The separation cylinder is provided with a sand outlet and a gas outlet. The sand supply tank is connected to the sand outlet. The dust collector is connected to the gas outlet. The sand supply tank is connected to the sandblasting pipe.

[0013] Optionally, the dust collector includes a filter cartridge and a back-blowing assembly, the filter cartridge being located inside the dust collector and the back-blowing assembly being disposed toward the filter cartridge.

[0014] Optionally, the sandblasting device further includes an air intake assembly connected to the sandblasting pipe for introducing compressed air into the sandblasting pipe.

[0015] The advantages of this utility model compared to the prior art are:

[0016] In sandblasting operations, the sandblasting robot can move across the surface of the object to be processed, and the sandblasting gun can automatically perform sandblasting operations under the action of the sandblasting robot. The displacement drive component first drives the sandblasting gun to move, improving the sandblasting efficiency of the sandblasting gun at multiple points. After the sandblasting gun moves to a specific sandblasting point, the sandblasting angle of the sandblasting gun is further adjusted by the angle adjustment component. Thus, the coarse adjustment of the displacement drive component increases the overall sandblasting coverage area of ​​the sandblasting robot at a single fixed point, and the fine adjustment process of the angle adjustment component improves the sandblasting efficiency for object surfaces of different shapes, making the sandblasting gun fit more closely to uneven object surfaces, preventing dust and sand from flying into the air from the gaps between the sandblasting gun and the object surface, and making it more environmentally friendly. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the sandblasting robot and sandblasting gun in an exemplary embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the internal structure of a sandblasting gun in an exemplary embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the overall structure of the sandblasting device in an exemplary embodiment of the present invention.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Sandblasting gun; 11. Sandblasting chamber; 12. Sandblasting pipe; 121. Sandblasting nozzle; 13. Sand return pipe; 14. Opening; 15. Enclosure; 2. Sandblasting robot; 3. Connecting arm; 31. Horizontal section; 32. Vertical section; 4. Displacement drive assembly; 41. Displacement drive component; 42. First rotating shaft; 5. Angle adjustment assembly; 51. Angle adjustment drive component; 52. Rotating fixing component; 521. Rotating part; 522 1. Fixed part; 6. Roughness detector; 7. Separation cylinder; 8. Sand supply tank; 9. Dust collector; 91. Filter cartridge; 92. Backflush assembly; 10. Vacuum pump; 101. First air inlet valve; 102. Pressure reducing valve; 103. Second air inlet valve; 104. Air distribution tank; 105. Boost valve; 106. Air inlet pipe; 107. Sand valve; 108. Exhaust valve; 109. Safety valve; 110. Hand hole; 111. Casters. Detailed Implementation

[0022] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Although some embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this utility model. It should be understood that the drawings and embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of protection of this utility model.

[0023] This utility model provides a sandblasting device, as shown in the reference. Figure 1 As shown, the sandblasting device includes a sandblasting gun 1, a sandblasting robot 2, a connecting arm 3, a displacement drive assembly 4, and an angle adjustment assembly 5. The sandblasting robot 2 is mobile. The displacement drive assembly 4 is mounted on the sandblasting robot 2 and connected to the sandblasting gun 1 via the connecting arm 3. The displacement drive assembly 4 is used to drive the sandblasting gun 1 to move. The angle adjustment assembly 5 is located at one end of the connecting arm 3 near the sandblasting gun 1 and is connected to the sandblasting gun 1. The angle adjustment assembly 5 is used to adjust the sandblasting angle of the sandblasting gun 1.

[0024] Specifically, such as Figure 1 As shown, the sandblasting robot 2 can be a four-wheeled robot. During sandblasting operations, the sandblasting robot 2 can walk on the surface of the object to be processed, and the sandblasting gun 1 can achieve automatic sandblasting under the action of the sandblasting robot 2. The displacement drive component 4 can first drive the sandblasting gun 1 to move, improving the sandblasting efficiency of the sandblasting gun 1 for multiple points. After the sandblasting gun 1 moves to a specific sandblasting point, the sandblasting angle of the sandblasting gun 1 is further adjusted by the angle adjustment component 5. Thus, the coarse adjustment of the displacement drive component 4 increases the overall sandblasting coverage area of ​​the sandblasting robot 2 at a single fixed point, and the fine adjustment process of the angle adjustment component 5 improves the sandblasting efficiency for object surfaces of different shapes, making the sandblasting gun 1 fit more closely to the uneven object surface, preventing dust and sand from flying into the air from the gap between the sandblasting gun 1 and the object surface, making it more environmentally friendly.

[0025] like Figure 1 As shown, the connecting arm 3 may include a horizontal section 31 and a vertical section 32. The horizontal section 31 extends the sandblasting gun 1 horizontally beyond the sandblasting robot 2, while the vertical section 32 extends the sandblasting gun 1 to the surface of the object to be sandblasted. The angle adjustment component 5 is specifically installed on the vertical section 32 near the surface of the object to be sandblasted. By adjusting the orientation of the sandblasting gun 1 through the angle adjustment component 5, it is possible to adjust the sandblasting angle of the sandblasting gun 1 over a wide range, making the sandblasting gun 1 more suitable for sandblasting uneven surfaces, such as right-angle plates and curved surfaces.

[0026] In some alternative embodiments, refer to Figure 1As shown, the displacement drive assembly 4 includes a displacement drive component 41 and a first rotating shaft 42. The first rotating shaft 42 is connected to the displacement drive component 41 and the connecting arm 3 respectively. The displacement drive component 41 is used to drive the first rotating shaft 42 to rotate, so as to drive the connecting arm 3 and the sandblasting gun 1 to rotate around the first rotating shaft 42 in a horizontal circumferential direction.

[0027] like Figure 1 As shown, the main structure of the sandblasting robot 2 may include a mounting base and four drive wheels connected to the mounting base. The displacement drive assembly 4 is mounted on the mounting base. Specifically, the displacement drive component 41 may be a motor, which can drive the first rotating shaft 42 to rotate via a gear set or directly drive the first rotating shaft 42 to rotate. The first rotating shaft 42 is fixedly connected to the end of the connecting arm 3. Therefore, when the first rotating shaft 42 rotates, it drives the connecting arm 3 and the sandblasting gun 1 to rotate together in a horizontal circumferential direction around the first rotating shaft 42. By adopting this displacement drive method, the working area of ​​the sandblasting gun 1 is expanded from a single straight line area to an arc-shaped or circular area centered on the first rotating shaft 42, which is beneficial to improving the convenience of sandblasting the surface of circular or annular objects.

[0028] In some alternative embodiments, the displacement drive assembly 4 may also include a ball joint support connected to the connecting arm 3. Specifically, the ball joint support may be mounted on the mounting plate of the sandblasting robot 2, and may be driven by hydraulics or an electric motor. In this partial embodiment, the rotation of the ball joint support drives the connecting arm 3 and the sandblasting gun 1 to rotate along multiple planes and directions, further expanding the coarse adjustment range.

[0029] In some alternative embodiments, refer to Figure 1 As shown, the angle adjustment assembly 5 includes an angle adjustment drive 51 and a rotating fixing member 52. The rotating fixing member 52 is rotatably connected to the connecting arm 3 and is connected to the sandblasting gun 1. The angle adjustment drive 51 is used to drive the rotating fixing member 52 to rotate relative to the connecting arm 3, so as to drive the sandblasting gun 1 to rotate around the end of the connecting arm 3 in the circumferential direction in the vertical plane.

[0030] Specifically, such as Figure 1As shown, the angle adjustment drive 51 can also be a motor. The rotating fixing member 52 includes a rotating part 521 and fixing parts 522 connected to the two ends of the rotating part 521. The two fixing parts 522 are arranged parallel to each other and perpendicular to the rotating part 521. The rotating part 521 is rotatably connected to the end of the connecting arm 3 through a second rotating shaft (not shown in the figure), specifically rotating around the rotating part 521 in a vertical circumferential direction. Correspondingly, by connecting each fixing part 522 to the outer wall of the sandblasting gun 1, the sandblasting gun 1 is fixed between the two fixing parts 522. Specifically, each fixing part 522 and the sandblasting gun 1 can be connected by any detachable connection method such as bolt connection or snap connection. By firmly connecting the sandblasting gun 1 to the rotating fixing member 52, the orientation of the sandblasting gun 1 can be changed under the rotation of the rotating fixing member 52, thereby realizing angle adjustment and further improving the working efficiency of the sandblasting gun 1 relative to the bending plane.

[0031] In other alternative embodiments, the rotating fixing member 52 may also be connected to the connecting arm 3 via a universal joint (not shown in the figure), which can further improve the flexibility of the angle adjustment of the sandblasting gun 1 and is more suitable for sandblasting surfaces with slight curvature.

[0032] In some alternative embodiments, refer to Figure 1 As shown, the sandblasting device also includes a roughness detector 6, which is used to detect the roughness of the object surface after sandblasting. The roughness detector 6 is connected to the rotating fixing member 52, which is used to drive the sandblasting gun 1 and the roughness detector 6 to rotate simultaneously in the circumferential direction in the vertical plane by rotating itself.

[0033] like Figure 1 As shown, the roughness detector 6 is spaced apart from the sandblasting gun 1 and connected to both sides of the rotating part 521. In the actual sandblasting process, taking the un-sandblasted area as the front and the sandblasted area as the rear as an example, the sandblasting gun 1 is located in front, and the roughness detector 6 is located in the rear. This facilitates timely detection of the sandblasting degree of the object surface. It should be understood that the maximum inner diameter of the sandblasting gun 1 and the maximum length of the roughness detector 6 are both smaller than the gap within the connecting arm 3, so that both the sandblasting gun 1 and the roughness detector 6 can pass through the gap in the connecting arm 3.

[0034] Specifically, the roughness detector 6 uses a high-precision laser to scan the surface of the object to be tested, and the output result is the surface roughness (Ra value). Before the sandblasting operation, the roughness detector 6 can be set to perform detection at fixed time intervals or distance intervals during the movement of the sandblasting robot 2. Furthermore, the roughness detector 6 can also be electrically connected to the robot motion control system to provide real-time feedback of the surface roughness to the robot motion control system. After receiving the electrical signal of the surface roughness, the robot motion control system can issue a control signal to control the robot's movement. Specifically, for surfaces with severe rust and inherently high roughness, if the roughness detected on the surface after sandblasting exceeds the upper limit of the specified value, the robot motion control system will instruct the sandblasting robot 2 to retreat to the previous sandblasting point for a second sandblasting, repeating the above process until the roughness is within the required range. In other working conditions, for surfaces that are inherently smooth and require sandblasting to increase surface adhesion, if the roughness detected after the operation is less than the lower limit of the specified value, the robot motion control system will similarly instruct the sandblasting robot 2 to retreat to the previous sandblasting point for a second sandblasting, repeating the above process until the roughness is within the required range.

[0035] In this invention, a rotating fixing member 52 is used to connect the roughness detector 6 and the sandblasting gun 1. When the rotating fixing member 52 rotates, the roughness detector 6 can change its angle together with the sandblasting gun 1, thereby achieving the effect of detecting the surface of the object at any time.

[0036] Furthermore, Figure 2 This is a schematic diagram of the sandblasting gun 1 in an exemplary embodiment of the present invention. (Refer to...) Figure 2 As shown, in this embodiment, the sandblasting gun 1 is connected to a sandblasting pipe 12 and a return sand pipe 13. The sandblasting gun 1 has a sandblasting chamber 11 inside, which is connected to the sandblasting pipe 12 and the return sand pipe 13 respectively. The bottom of the sandblasting gun 1 is provided with an opening 14, and the end of the sandblasting pipe 12 is provided with a sandblasting nozzle 121. The sandblasting nozzle 121 is located in the sandblasting chamber 11 and extends toward the opening 14 of the sandblasting gun 1. The diameter of the sandblasting pipe 12 gradually increases from the end away from the opening 14 to the end closer to the opening 14. The diameter of the sandblasting nozzle 121 of the sandblasting pipe 12 is smaller than the diameter of the opening 14 of the sandblasting gun 1, and the sandblasting nozzle 121 is located in the middle of the opening 14 of the sandblasting gun 1.

[0037] Depend on Figure 2 As shown, during sandblasting, the sand and high-pressure airflow enter the sandblasting chamber 11 through the sandblasting pipe 12, and are then sprayed sequentially onto the surface of the steel structure through the sandblasting nozzles 121 of the sandblasting pipe 12 to sandblast the surface of the steel structure. After sandblasting is completed, under the action of negative pressure, the rebounded sand enters the area of ​​the sandblasting chamber 11 above the sandblasting nozzles 121, and is finally recovered through the sand return pipe 13.

[0038] Compared to a single-diameter sandblasting pipe 12, this invention features a gradually expanding structure for the sandblasting pipe 12, meaning the inner diameter gradually increases from top to bottom. This gradually reduces the mixing velocity of the sand and airflow, thereby slowing down the dispersion speed of sand particles and dust, guiding the airflow to diffuse smoothly, avoiding the formation of turbulence or local high-pressure zones in narrow channels, reducing secondary pollution caused by disordered sand rebound, and minimizing spillage losses. Furthermore, this, combined with a negative pressure system, allows for more efficient sand recovery. In addition, the expanded lower end of the sandblasting pipe 12 increases the coverage area of ​​the sandblasting nozzle 121 with the increased diameter, allowing for the treatment of a wider surface area in a single spray. This is particularly suitable for sandblasting large-area flat or curved surfaces, improving operational efficiency. Simultaneously, the gradually expanding structure of the sandblasting pipe 12 maximizes the volume of the recovery area above the sandblasting nozzle 121, ensuring that the mixture of sand, rust, and dust is recovered to the greatest extent possible via the return sand pipe 13. This prevents blockage of the mixture between the sandblasting pipe 12 and the inner wall of the sandblasting gun 1, further improving recovery efficiency.

[0039] Furthermore, referring to Figure 2 As shown, the end of the sandblasting gun 1 is provided with a baffle portion 15, which is distributed circumferentially along the opening 14 of the sandblasting gun 1. The baffle portion 15 at the end of the sandblasting gun 1 can fit against the surface of the object to be sandblasted, so that the sandblasting chamber 11 is relatively sealed. Specifically, the baffle portion 15 can be a brush, and a flexible brush is more conducive to fitting against uneven surfaces.

[0040] This utility model provides a baffle 15 at the end of the sandblasting gun 1. The baffle 15 is in close contact with the surface of the object to be sandblasted during the sandblasting process, forming a relatively sealed space. This helps to prevent the sprayed sand and dust generated during the sandblasting process from flying into the air, so that most of the sand and dust can be recycled through the sand return pipe 13.

[0041] In some alternative embodiments, refer to Figure 3 As shown, the sandblasting device also includes a separation cylinder 7, a sand supply tank 8, and a dust collector 9. The separation cylinder 7 is connected to the sandblasting chamber 11 via a sand return pipe 13, and the sand supply tank 8 is connected to the sandblasting chamber 11 via a sandblasting pipe 12. The separation cylinder 7 has a sand outlet and a gas outlet. The sand supply tank 8 is connected to the sand outlet, and the dust collector 9 is connected to the gas outlet. The dust collector 9 is connected to a vacuum pump 10, which generates negative pressure in the system to recover dust and fine particles generated during the sandblasting process, and collect waste and impurities after sandblasting. This allows for sand recovery and dust removal when working outdoors.

[0042] like Figure 3As shown, the abrasive material after grinding enters the separation cylinder 7 through the return sand pipe 13 under negative pressure. Inside the separation cylinder 7, the abrasive material and impurities such as rust are separated, specifically by screening through a filter screen. The separated abrasive material enters the sand supply tank 8 through the abrasive outlet for secondary use. The gas stream containing waste material enters the dust collector 9 through the gas outlet for dust removal before being discharged. In this embodiment, the length of the sandblasting pipe 12 and the recovery pipe is designed to be greater than 20 meters, and both can be corrugated pipes, thus facilitating sandblasting of different angles by the sandblasting gun 1.

[0043] In some alternative embodiments, refer to Figure 3 As shown, the dust collector 9 includes a filter cartridge 91 and a back-blowing assembly 92. The filter cartridge 91 is located inside the dust collector 9, and the back-blowing assembly 92 is positioned facing the filter cartridge 91. The lower part of the dust collector 9 is a dust storage hopper. The back-blowing assembly 92 may specifically include a back-blowing valve, a back-blowing air pipe, and a back-blowing nozzle. During the unloading process of the filter cartridge 91, the back-blowing valve opens, and high-pressure gas enters the back-blowing nozzle through the back-blowing air pipe. The high-pressure gas is then sprayed onto the filter cloth through the back-blowing nozzle, and the high-pressure gas quickly removes the residue on the filter cloth.

[0044] Furthermore, in some optional embodiments, reference is made to... Figure 3 As shown, the sandblasting device also includes an air intake assembly, which is connected to the sandblasting pipe 12 and is used to introduce compressed air into the sandblasting pipe 12. The air intake assembly includes a first air intake valve 101, a pressure reducing valve 102, a second air intake valve 103, an air distribution tank 104, a booster valve 105, and an air intake pipe 106 arranged sequentially. The first air intake valve 101 regulates or cuts off airflow, cutting off the airflow in abnormal conditions to ensure the equipment operates within a suitable pressure range. The pressure reducing valve 102 regulates the airflow pressure to ensure a constant output pressure. The second air intake valve 103 controls the opening and closing of the air intake channel, allowing airflow to further enter the air distribution tank 104. The gas diffuses within the air distribution tank 104, balancing the pressure. A pressure relief valve (not shown in the figure) is also provided at the lower end of the air distribution tank 104. This valve senses system pressure through an internal spring or diaphragm; when the system pressure exceeds a set value, it automatically releases excess pressure to prevent equipment damage or accidents. The gas in the gas distribution tank 104 then enters the air intake pipe 106 through the booster valve 105, thereby enhancing the sandblasting airflow and improving sandblasting efficiency by introducing additional compressed air.

[0045] Reference Figure 3As shown, the sand supply tank 8 is equipped with a sand valve 107 at its bottom. The air inlet pipe 106 and the sand valve 107 are connected in sequence to the sandblasting pipe 12. The sand valve 107 is used to control the falling of the sand. Under the action of compressed air, the sand is transported to the sandblasting gun 1 through the sandblasting pipe 12. The side of the sand supply tank 8 is equipped with an exhaust valve 108 and a safety valve 109. After the sandblasting operation is completed, opening the exhaust valve 108 can restore the air pressure inside the tank to a normal state. The safety valve 109 is used to automatically release pressure when the internal pressure of the sand supply tank 8 is too high, so as to avoid the sandblasting tank explosion or other dangerous accidents. In addition, the side of the sand supply tank 8 is also equipped with a handhole 110 for equipment maintenance, inspection and cleaning.

[0046] In addition, refer to Figure 3 As shown, the separator 7, sand supply tank 8 and dust collector 9 can all be installed on the integrated mobile platform. The bottom of the integrated mobile platform is equipped with casters 111, which facilitates the transportation of the entire system.

[0047] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. A sandblasting device, characterized in that, The system includes a sandblasting gun (1), a sandblasting robot (2), a connecting arm (3), a displacement drive assembly (4), and an angle adjustment assembly (5). The sandblasting robot (2) is mobile. The displacement drive assembly (4) is disposed on the sandblasting robot (2). The displacement drive assembly (4) is connected to the sandblasting gun (1) through the connecting arm (3). The displacement drive assembly (4) is used to drive the sandblasting gun (1) to move. The angle adjustment component (5) is located at one end of the connecting arm (3) near the sandblasting gun (1). The angle adjustment component (5) is connected to the sandblasting gun (1) and is used to adjust the sandblasting angle of the sandblasting gun (1).

2. The sandblasting device according to claim 1, characterized in that The displacement drive assembly (4) includes a displacement drive component (41) and a first rotating shaft (42). The first rotating shaft (42) is connected to the displacement drive component (41) and the connecting arm (3) respectively. The displacement drive component (41) is used to drive the first rotating shaft (42) to rotate, so as to drive the connecting arm (3) and the sandblasting gun (1) to rotate around the first rotating shaft (42) in a circumferential direction in the horizontal plane.

3. The sandblasting device of claim 1, wherein, The displacement drive assembly (4) includes a ball joint support, which is connected to the connecting arm (3).

4. The sandblasting device of claim 1, wherein, The angle adjustment assembly (5) includes an angle adjustment drive (51) and a rotating fixing member (52). The rotating fixing member (52) is rotatably connected to the connecting arm (3) and connected to the sandblasting gun (1). The angle adjustment drive (51) is used to drive the rotating fixing member (52) to rotate relative to the connecting arm (3) so as to drive the sandblasting gun (1) to rotate around the end of the connecting arm (3) in a circumferential direction in a vertical plane.

5. The sandblasting device of claim 4, wherein, It also includes a roughness detector (6), which is used to detect the roughness of the object surface after sandblasting. The roughness detector (6) is connected to the rotating fixing member (52), which is used to drive the sandblasting gun (1) and the roughness detector (6) to rotate simultaneously in the circumferential direction in the vertical plane by rotating itself.

6. The sandblasting device of claim 1, wherein, The sandblasting gun (1) includes a sandblasting pipe (12) and a return sand pipe (13). The sandblasting gun (1) has a sandblasting chamber (11) inside. The sandblasting chamber (11) is connected to the sandblasting pipe (12) and the return sand pipe (13) respectively. The bottom of the sandblasting gun (1) is provided with an opening (14). The end of the sandblasting pipe (12) is provided with a sandblasting nozzle (121). The sandblasting nozzle (121) is located in the sandblasting chamber (11) and extends toward the opening (14) of the sandblasting gun (1). The inner diameter of the sandblasting pipe (12) gradually increases from the end away from the opening (14) to the end closer to the opening (14).

7. The sandblasting device of claim 6, wherein The end of the sandblasting gun (1) is provided with a baffle (15), which is distributed circumferentially along the opening (14) of the sandblasting gun (1).

8. The sandblasting device of claim 6, wherein, It also includes a separation cylinder (7), a sand supply tank (8), and a dust collector (9). The separation cylinder (7) is connected to the sandblasting chamber (11) through the sand return pipe (13). The separation cylinder (7) is provided with a sand outlet and a gas outlet. The sand supply tank (8) is connected to the sand outlet. The dust collector (9) is connected to the gas outlet. The sand supply tank (8) is connected to the sandblasting pipe (12).

9. The sandblasting device of claim 8, wherein, The dust collector (9) includes a filter cartridge (91) and a back-blowing assembly (92). The filter cartridge (91) is located inside the dust collector (9), and the back-blowing assembly (92) is arranged facing the filter cartridge (91).

10. The sandblasting device of claim 6, wherein, It also includes an air intake assembly, which is connected to the sandblasting pipe (12) and is used to introduce compressed air into the sandblasting pipe (12).

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