Surface treatment device for concrete precast slab

Abstract

The invention relates to the technical field of concrete precast slab processing, in particular to a concrete precast slab surface treatment device which comprises a workbench, an air cylinder is horizontally and slidably connected to the bottom end of a fixing box on the workbench, a dust collection cover is fixedly installed at the output end of the air cylinder, and a step-by-step grinding mechanism is arranged in an inner cavity of the dust collection cover. The step-by-step grinding mechanism comprises a regular hexagonal prism rotationally connected to an inner cavity of the dust collection cover, six sand blocks with different mesh numbers are arranged on the outer wall of the regular hexagonal prism at equal intervals, the positions of the six sand blocks are changed by rotating the regular hexagonal prism, and the concrete prefabricated slab can be ground step by step through the six sand blocks; a cleaning assembly for cleaning the sand blocks is further arranged in the inner cavity of the dust collection cover, the cleaning assembly comprises a first annular cleaning brush which is rotationally connected to the inner cavity of the dust collection cover and abuts against the sand blocks, the positions of the six sand blocks with different mesh numbers can be changed by rotating the regular hexagonal prism, and then the concrete prefabricated slab can be polished step by step conveniently.

Description

Technical Field

[0001] The invention relates to the technical field of concrete precast slab processing, in particular to a surface treatment device for a concrete precast slab. Background Art

[0002] During the processing of precast concrete panels, a grinding device is required to grind the surface of the panels to ensure their flatness.

[0003] In the prior art, there is a utility model patent with a publication (announcement) number of CN219293495U and a name of a concrete precast panel grinder, which includes relatively arranged tracks, a gantry is slidably installed on the two tracks, a moving trolley is provided on the crossbeam of the gantry, a fixed plate is provided on the moving trolley, a cylinder is provided at the lower end of the fixed plate, a mounting plate is provided at the movable end of the cylinder, a driving motor is provided at the lower end of the mounting plate, a grinding disc is provided on the output shaft of the driving motor, a plurality of connecting rods are provided at the lower end of the mounting plate, a dust shield is provided at the lower end of the plurality of connecting rods, a dust shield is provided at the lower end of the dust shield, an air outlet is provided on the upper side wall of the dust shield, a dust collecting box is provided on the crossbeam, an air inlet is provided on the side wall of the dust collecting box, a dust removal fan is provided on the air inlet, the air inlet and the air outlet are connected by a dust removal hose, the dust shield and the dust shield limit the dust overflow during the grinding process, and under the action of the dust removal fan, the dust generated by grinding is collected into the dust collecting box via a pipeline, thereby effectively reducing the amount of dust in the working environment.

[0004] Under the action of the dust removal fan, the dust generated by grinding in the equipment of the patent is collected into the dust collection box through the pipe, which effectively reduces the amount of dust in the working environment and is beneficial to the hygiene of the working environment. However, the equipment of the patent still has the following technical defects during use: (1) Since the grinding disc in the equipment of the patent is of fixed specifications, the grinding accuracy of the equipment is limited, which is inconvenient to meet the use needs of the staff; (2) Since the debris remaining on the grinding disc in the equipment of the patent will accelerate its wear, it needs to be cleaned regularly, and the grinding disc in the equipment of the patent is not easy to clean, which brings certain inconvenience to the use of the staff. Summary of the invention

[0005] The object of the present invention is to provide a surface treatment device for a precast concrete panel.

[0006] The technical problems solved by the present invention are: (1) the grinding discs in the existing equipment are of fixed specifications, which leads to limited grinding accuracy of the equipment; (2) the existing equipment is inconvenient to clean the grinding discs.

[0007] The present invention can be implemented by the following technical scheme: a surface treatment device for a concrete precast panel comprises a workbench, a cylinder is horizontally slidably connected to the bottom end of a fixed box on the workbench, a dust collecting cover is fixedly installed on the output end of the cylinder, a step-by-step grinding mechanism is arranged in the inner cavity of the dust collecting cover, the step-by-step grinding mechanism comprises a regular hexagonal prism rotatably connected to the inner cavity of the dust collecting cover, six sand blocks with different mesh sizes are equidistantly arranged on the outer wall of the regular hexagonal prism, the regular hexagonal prism is rotated to change the positions of the six sand blocks, and the concrete precast panel can be ground step by step by the six sand blocks;

[0008] The inner cavity of the dust collecting cover is also provided with a cleaning assembly for cleaning the sand blocks, and the cleaning assembly comprises a first annular cleaning brush which is rotatably connected to the inner cavity of the dust collecting cover and abuts against the sand blocks.

[0009] A further technical improvement of the present invention is that a matching groove matched with the dust collecting hood is provided on the top wall of the workbench and located on one side of the concrete precast plate.

[0010] A further technical improvement of the present invention is that a dust suction mechanism is arranged at the top of the dust hood, the dust suction mechanism includes a dust suction fan and a collection box fixed to the top of the dust hood, the dust hood is fixedly mounted on the inner top wall of the dust hood, the collection box and the dust hood are connected through the dust suction fan, and the inner cavity of the dust hood is also rotatably connected to a second annular cleaning brush that abuts against the precast concrete plate on the workbench.

[0011] A further technical improvement of the present invention is that the second annular cleaning brush is connected to the first annular cleaning brush by a belt member, the belt member includes two pulleys respectively sleeved on the outer peripheral walls of the second annular cleaning brush and the first annular cleaning brush, and the two pulleys are connected by a transmission belt.

[0012] A further technical improvement of the present invention is that a servo motor for driving the first annular cleaning brush to rotate is fixedly mounted on one side of the dust collecting cover.

[0013] A further technical improvement of the present invention is that the inner cavity of the dust hood is also provided with a dividing assembly that enables the regular hexagonal prism to rotate sixty degrees, the dividing assembly includes an active dial fixed to both sides of the first circular ring cleaning brush, and driven groove wheels are fixedly installed on both sides of the regular hexagonal prism, the convex locking arc of the active dial is matched with the concave locking arc of the driven groove wheel, a round pin is fixedly installed on one side of the active dial, and the outer peripheral wall of the driven groove wheel is provided with six radial grooves for the round pin to pass through.

[0014] A further technical improvement of the present invention is that the regular hexagonal prism and the six sand blocks are connected by a detachable component, the detachable component includes six mounting grooves opened on the outer wall of the regular hexagonal prism and adapted to the sand blocks, a sliding plate for mounting the sand blocks is provided on one side of the regular hexagonal prism through a telescopic member, a first positioning column and a second positioning column are fixedly installed on the sliding plate and the inner wall of the mounting groove, and positioning grooves are opened on both sides of the sand block, and the two positioning grooves correspond to the first positioning column and the second positioning column, respectively.

[0015] A further technical improvement of the present invention is that the telescopic member includes an outer sleeve fixed to the inner cavity of a regular hexagonal prism, the inner cavity of the outer sleeve is slidably connected to an inner sleeve fixedly connected to a sliding plate, and an extrusion spring fixed to the inner sleeve is fixedly installed on the inner wall of the outer sleeve.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention arranges a regular hexagonal prism in a rotatable manner in the inner cavity of the dust collecting hood, and arranges six sand blocks of different mesh sizes at equal intervals on the outer wall of the regular hexagonal prism. The positions of the six sand blocks of different mesh sizes can be changed by rotating the regular hexagonal prism, thereby facilitating the step-by-step grinding of the concrete precast panel. When the positions of the sand blocks are adjusted, the active dial is rotated. When the round pin fixed on the active dial does not enter the radial groove in the driven groove wheel, the inner concave locking arc of the driven groove wheel will be stuck by the outer convex locking arc of the active dial, so the driven groove wheel does not move. The active dial is rotated to make the round pin enter the radial groove in the driven groove wheel. The driven groove wheel rotates due to the drive of the round pin, and when the round pin leaves the radial groove on the other side, the inner concave locking arc of the driven groove wheel will be stuck again. The driven groove wheel is stuck by the convex locking arc of the active dial, and it remains stationary until the round pin enters another radial groove of the driven groove wheel again and repeats the above movement. Therefore, when the active dial rotates one circle, the driven groove wheel will rotate sixty degrees, and when the active dial rotates one circle again, the driven groove wheel will also rotate sixty degrees accordingly, so as to facilitate the conversion of the fine-mesh sand block to the position of the original coarse-mesh sand block. After the position conversion, the above operation is repeated for grinding. After grinding, the sand block with finer mesh is replaced again to grind it. By using sand blocks of different meshes to gradually grind the concrete precast panel, its surface can be treated more effectively, and finally a finer surface finish can be obtained, so as to facilitate the improvement of the overall grinding accuracy of the equipment and facilitate use.

[0018] 2. In the process of replacing the position of the sand block of the present invention, the driven rotating rod drives the linkage rotating rod to rotate synchronously through the action of the belt part. At this time, the first circular ring-shaped cleaning brush and the second circular ring-shaped cleaning brush fixedly mounted on the outer peripheral wall of the driven rotating rod and the linkage rotating rod will rotate accordingly. The rotation of the first circular ring-shaped cleaning brush facilitates cleaning of the sand block, and the coordinated rotation of the second circular ring-shaped cleaning brush facilitates lifting of dust in the dust collecting hood, thereby facilitating the collection of the raised dust into the collection box through the dust collecting hood, and further facilitating subsequent use by the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the side structural connection of the dust collecting hood of the present invention;

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure connection of the dust collecting hood of the present invention;

[0023] Figure 4 For the present invention Figure 3 A partial enlarged view of the middle A;

[0024] Figure 5 It is a schematic diagram of the local structural connection of the present invention;

[0025] Figure 6 It is a schematic diagram of the internal structure connection of the telescopic member of the present invention;

[0026] Figure 7 It is a schematic diagram of the internal structural connection of the mounting block of the present invention.

[0027] In the figure:

[0028] 1. Workbench; 11. Inner groove; 12. Fixed box; 13. Screw rod; 14. Screw sleeve; 15. Driving motor; 16. Cylinder; 17. U-shaped mounting bracket; 18. Matching groove;

[0029] 2. Dust collecting cover; 21. Dust collecting slot; 22. Isolation slot; 23. Active rotating rod; 24. Driven rotating rod; 25. Active dial; 26. Driven groove wheel; 27. Round pin; 28. Radial slot; 29. ​​Servo motor;

[0030] 3. First circular ring cleaning brush; 31. Linked rotating rod; 32. Second circular ring cleaning brush; 33. Belt member;

[0031] 4. Dust hood; 41. Dust fan; 42. Collection box;

[0032] 5. Regular hexagonal prism; 51. Mounting groove; 52. Mounting block; 53. Sand block; 531. Connecting plate; 532. Sliding groove; 533. Connecting spring assembly; 54. Sliding plate; 55. Auxiliary groove; 56. Telescopic member; 561. Outer sleeve; 562. Inner sleeve; 563. Extrusion spring; 57. First positioning column; 58. Second positioning column; 59. Ring-shaped magnetic sheet. DETAILED DESCRIPTION

[0033] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0034] See also Figure 1 As shown, the surface treatment device of the concrete precast panel comprises a workbench 1 for placing the concrete precast panel, the top wall of the workbench 1 is provided with an inner groove 11, and the inner cavity of the inner groove 11 is provided with a rubber pad to prevent the concrete precast panel from sliding during grinding.

[0035] See also Figure 1 As shown, a support plate is fixedly installed on the back of the workbench 1, and a grinding mechanism is arranged at one end of the support plate away from the workbench 1, the grinding mechanism comprises a fixed box 12 fixed to the support plate, a screw rod 13 is rotatably connected between the two inner side walls of the fixed box 12 through a bearing, a driving motor 15 for rotating the screw rod 13 is fixedly installed on one side of the fixed box 12, a threaded sleeve on the outer peripheral wall of the screw rod 13 is provided with a screw sleeve 14 horizontally slidably connected to the inner cavity of the fixed box 12, a cylinder 16 fixedly connected to the screw sleeve 14 is horizontally slidably connected to the bottom wall of the fixed box 12, a U-shaped mounting bracket 17 is fixedly installed on the output end of the cylinder 16, a dust hood 2 is fixedly installed on the end of the U-shaped mounting bracket 17 away from the cylinder 16, a matching groove 18 matched with the dust hood 2 is provided on the top wall of the workbench 1 and on one side of the inner groove 11, and the matching groove 18 is used to transfer dust generated in the dust hood 2 due to grinding;

[0036] See also Figure 2-5 As shown, the inner cavity of the dust collecting hood 2 is provided with a dust collecting groove 21, and the inner cavity of the dust collecting hood 2 and the two sides of the dust collecting groove 21 are provided with isolation grooves 22. An active rotating rod 23, a driven rotating rod 24, and a linkage rotating rod 31 are rotatably connected between the two inner side walls of the dust collecting groove 21. Both ends of the active rotating rod 23 and the driven rotating rod 24 successively penetrate the dust collecting groove 21 and the isolation groove 22 and extend to the inner cavity of the isolation groove 22. One end of the driven rotating rod 24 extending to the inner cavity of the isolation groove 22 is rotatably connected to the inner wall of the isolation groove 22 through a bearing. A servo drive for driving the active rotating rod 23 to rotate is fixedly installed on one side of the dust collecting hood 2 The motor 29 and the outer peripheral wall fixed sleeve of the driven rotating rod 24 are provided with a regular hexagonal prism 5, and the outer wall of the regular hexagonal prism 5 is provided with six mounting grooves 51, and the six mounting grooves 51 are evenly distributed in a circular array on the outer wall of the regular hexagonal prism 5. The inner cavity of the mounting groove 51 is provided with a mounting block 52 adapted thereto, and a sand block 53 is provided on the mounting block 52. The mesh numbers and specifications of the six sand blocks 53 are different. The outer peripheral wall fixed sleeve of the active rotating rod 23 is provided with a first annular cleaning brush 3 abutting against the sand block 53, and the outer peripheral wall fixed sleeve of the linkage rotating rod 31 is provided with a second annular cleaning brush 32 abutting against the concrete precast plate;

[0037] The driven rotating rod 24 and the linkage rotating rod 31 are connected by a belt member 33. The belt member 33 includes two pulleys respectively sleeved on the outer peripheral walls of the driven rotating rod 24 and the linkage rotating rod 31. The two pulleys are connected by a transmission belt.

[0038] See also Figure 2-3 As shown, the top wall of the dust hood 2 is provided with a dust suction assembly, and the dust suction assembly includes a dust suction fan 41 fixed to the top wall of the dust hood 2, the dust hood 4 is fixedly installed on the inner top wall of the dust hood 2, and a collection box 42 is also fixedly installed on the top wall of the dust hood 2, and the collection box 42 and the dust hood 4 are connected through the dust suction fan 41.

[0039] See also Figure 2 , 4 As shown, the inner cavity of each isolation groove 22 is provided with an indexing assembly that drives the driven rotating rod 24 to rotate intermittently, and the indexing assembly includes an active dial 25 fixedly sleeved on the outer peripheral wall of the active rotating rod 23 and located in the inner cavity of the isolation groove 22, and a driven groove wheel 26 is fixedly sleeved on the outer peripheral wall of the driven rotating rod 24 and located in the inner cavity of the isolation groove 22, and the outer convex locking arc of the active dial 25 is matched with the inner concave locking arc of the driven groove wheel 26, and a round pin 27 is fixedly installed on the side of the active dial 25 away from the inner cavity of the isolation groove 22, and the outer peripheral wall of the driven groove wheel 26 is provided with six radial grooves 28 for the round pin 27 to pass through. When the round pin 27 fixed on the active dial 25 does not enter the radial groove 28 in the driven groove wheel 26, the driven groove wheel 26 The concave locking arc will be caught by the convex locking arc of the active dial 25, so the driven groove wheel 26 does not move. The active dial 25 is rotated to make the round pin 27 enter the radial groove 28 in the driven groove wheel 26. The driven groove wheel 26 rotates due to the drive of the round pin 27, and when the round pin 27 leaves the radial groove 28 on the other side, the concave locking arc of the driven groove wheel 26 will be caught by the convex locking arc of the active dial 25 again. The driven groove wheel 26 is stationary again until the round pin 27 enters another radial groove 28 of the driven groove wheel 26 again and repeats the above movement. Therefore, when the active dial 25 rotates one circle, the driven groove wheel 26 will rotate sixty degrees, and when the active dial 25 rotates one circle again, the driven groove wheel 26 will also rotate sixty degrees again.

[0040] See also Figure 5-6As shown, the outer peripheral wall of the driven rotating rod 24 is slidably connected with a sliding plate 54 adapted to the regular hexagonal prism 5, and the sliding plate 54 and the regular hexagonal prism 5 are connected by at least two telescopic members 56, and the telescopic member 56 includes an outer sleeve 561 fixed to the inner cavity of the regular hexagonal prism 5, and the inner cavity of the outer sleeve 561 is slidably connected with an inner sleeve 562 fixedly connected to the sliding plate 54, and the inner wall of the outer sleeve 561 is fixedly installed with an extrusion spring 563 fixed to the inner sleeve 562, and the outer wall of the sliding plate 54 is provided with an auxiliary groove 55 corresponding to the mounting groove 51, and the mounting block 5 2 is provided with positioning grooves on both sides, and the inner walls of the auxiliary groove 55 and the mounting groove 51 are respectively fixedly installed with a first positioning column 57 and a second positioning column 58, and the two positioning grooves correspond to the first positioning column 57 and the second positioning column 58 respectively. A circular ring-shaped magnetic sheet 59 that is magnetically attracted to the sliding plate 54 is fixedly installed on the edge of the regular hexagonal prism 5 close to the sliding plate 54. The sliding sliding plate 54 is convenient for installing and removing the sand block 53. The detachable design of the sand block 53 and the regular hexagonal prism 5 is convenient for the staff to regularly replace the sand block 53, thereby facilitating the use needs of the staff.

[0041] See also Figure 7 As shown, the inner cavity of the mounting block 52 is provided with a sliding groove 532 , the inner cavity of the sliding groove 532 is slidably connected with a connecting plate 531 fixed to the sand block 53 , and the inner wall of the sliding groove 532 is fixedly installed with a connecting spring group 533 fixed to the connecting plate 531 .

[0042] When the present invention is in use, the servo motor 29 is first driven to rotate the sand block 53 installed in the regular hexagonal prism 5 and to rotate the coarse-mesh sand block 53 to the working position. After adjustment, the concrete precast panel is placed in the inner groove 11 of the workbench 1. After the concrete precast panel is placed, the cylinder 16 is driven to make the coarse-mesh sand block 53 abut against the concrete precast panel, and then the driving motor 15 is operated. The driving motor 15 rotates the screw rod 13, and the rotation of the screw rod 13 can drive the screw sleeve 14 provided with a thread sleeve on its outer peripheral wall to slide horizontally. The screw sleeve 14 moves, and the coarse-mesh sand block 53 in the inner cavity of the dust hood 2 is driven by the dust hood 2 to grind the precast concrete panel. After the precast concrete panel is initially ground, the dust hood 2 will cover the matching groove 18 provided on the top wall of the workbench 1. In the process of grinding the precast concrete panel, the first annular cleaning brush 3 abuts against the precast concrete panel to drive the dust generated during the grinding process into the inner cavity of the matching groove 18. At this time, whether to replace the fine-mesh sand block 53 is selected according to the grinding condition of the precast concrete panel.

[0043] When there is no need to replace the sand block 53 with fine mesh, first drive the air cylinder 16 to raise the dust collecting cover 2 and then operate the driving motor 15 to reverse the screw rod 13. The sand block 53 with coarse mesh can be returned to the initial position by reversing the screw rod 13, and the above operation can be repeated.

[0044] When it is necessary to replace the sand block 53 with a fine mesh number, the dust suction fan 41 is first operated, and then the servo motor 29 is driven to rotate the active rotating rod 23. The rotation of the active rotating rod 23 drives the active dial 25 to rotate. When the round pin 27 fixed on the active dial 25 does not enter the radial groove 28 in the driven groove wheel 26, the concave locking arc of the driven groove wheel 26 will be stuck by the convex locking arc of the active dial 25, so the driven groove wheel 26 does not move. The active dial 25 is rotated to make the round pin 27 enter the radial groove 28 in the driven groove wheel 26. The driven groove wheel 26 rotates due to the drive of the round pin 27, and when the round pin 27 leaves the radial groove 28 on the other side, the concave locking arc of the driven groove wheel 26 will be stuck by the active dial 25 again. The outer convex locking arc of 5 is stuck, and the driven groove wheel 26 is stationary again until the round pin 27 enters another radial groove 28 of the driven groove wheel 26 again and repeats the above movement. Therefore, when the active dial 25 rotates one circle, the driven groove wheel 26 will rotate sixty degrees. When the active dial 25 rotates one circle again, the driven groove wheel 26 will also rotate sixty degrees accordingly, thereby facilitating the conversion of the fine mesh sand block 53 to the position of the original coarse mesh sand block 53. After the position conversion, the above operation is repeated for grinding. After grinding, the sand block 53 with a finer mesh is replaced again to grind it. By using sand blocks 53 with different meshes to gradually grind the concrete precast panel, its surface can be treated more effectively and a finer surface finish can be finally obtained.

[0045] During the process of replacing the position of the sand block 53, the driven rotating rod 24 drives the linkage rotating rod 31 to rotate synchronously through the action of the belt part 33. At this time, the first circular ring cleaning brush 3 and the second circular ring cleaning brush 32 fixedly mounted on the outer peripheral wall of the driven rotating rod 24 and the linkage rotating rod 31 will rotate accordingly. The rotation of the first circular ring cleaning brush 3 facilitates the cleaning of the sand block 53, and the coordinated rotation of the second circular ring cleaning brush 32 facilitates the dust in the dust collecting cover 2 to be raised, and then facilitates the dust to be collected into the collection box 42 through the dust collection cover 4.

[0046] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A surface treatment device for a precast concrete panel, comprising a workbench (1), wherein a cylinder (16) is horizontally slidably connected to the bottom end of a fixed box (12) on the workbench (1), and a dust collecting hood (2) is fixedly installed at the output end of the cylinder (16), characterized in that: The inner cavity of the dust collecting cover (2) is provided with a step-by-step grinding mechanism, the step-by-step grinding mechanism comprises a regular hexagonal prism (5) rotatably connected to the inner cavity of the dust collecting cover (2), the outer wall of the regular hexagonal prism (5) is equidistantly provided with six sand blocks (53) of different mesh sizes, the regular hexagonal prism (5) is rotated to change the positions of the six sand blocks (53), and the concrete precast slab can be ground step by step by the six sand blocks (53); The inner cavity of the dust collecting hood (2) is also provided with a cleaning assembly for cleaning the sand block (53), and the cleaning assembly comprises a first annular cleaning brush (3) which is rotatably connected to the inner cavity of the dust collecting hood (2) and abuts against the sand block (53).

2. The surface treatment device of the precast concrete panel according to claim 1, characterized in that: A matching groove (18) adapted to the dust collecting hood (2) is provided on the top wall of the workbench (1) and located on one side of the precast concrete slab.

3. The surface treatment device of the precast concrete panel according to claim 2, characterized in that: A dust suction mechanism is arranged at the top of the dust collecting hood (2), and the dust suction mechanism comprises a dust suction fan (41) and a collection box (42) fixed to the top of the dust collecting hood (2). A dust suction hood (4) is fixedly mounted on the inner top wall of the dust collecting hood (2), and the collection box (42) and the dust suction hood (4) are connected via the dust suction fan (41). The inner cavity of the dust collecting hood (2) is also rotatably connected to a second annular cleaning brush (32) that abuts against a concrete precast plate on the workbench (1).

4. The surface treatment device of the precast concrete panel according to claim 3, characterized in that: The second annular cleaning brush (32) is connected to the first annular cleaning brush (3) via a belt member (33), wherein the belt member (33) comprises two pulleys respectively sleeved on the outer peripheral walls of the second annular cleaning brush (32) and the first annular cleaning brush (3), and the two pulleys are connected via a transmission belt.

5. The surface treatment device of the precast concrete panel according to claim 1, characterized in that: A servo motor (29) for driving the first annular cleaning brush (3) to rotate is fixedly mounted on one side of the dust collecting cover (2).

6. The surface treatment device of the precast concrete panel according to claim 1, characterized in that: The inner cavity of the dust collecting hood (2) is also provided with a dividing assembly for rotating the regular hexagonal prism (5) sixty degrees, and the dividing assembly includes an active dial (25) fixed to both sides of the first annular cleaning brush (3), and a driven groove wheel (26) is fixedly installed on both sides of the regular hexagonal prism (5), and the outer convex locking arc of the active dial (25) is matched with the inner concave locking arc of the driven groove wheel (26), and a round pin (27) is fixedly installed on one side of the active dial (25), and the outer peripheral wall of the driven groove wheel (26) is provided with six radial grooves (28) for the round pin (27) to pass through.

7. The surface treatment device of the precast concrete panel according to claim 1, characterized in that: The regular hexagonal prism (5) and the six sand blocks (53) are connected via a detachable component, the detachable component comprising six mounting grooves (51) opened on the outer wall of the regular hexagonal prism (5) and adapted to the sand blocks (53); a sliding plate (54) for mounting the sand blocks (53) is provided on one side of the regular hexagonal prism (5) via a telescopic member (56); a first positioning column (57) and a second positioning column (58) are fixedly mounted on the sliding plate (54) and the inner wall of the mounting groove (51), respectively; positioning grooves are opened on both sides of the sand block (53), and the two positioning grooves correspond to the first positioning column (57) and the second positioning column (58), respectively.

8. The surface treatment device of the precast concrete panel according to claim 7, characterized in that: The telescopic member (56) comprises an outer sleeve (561) fixed to the inner cavity of the regular hexagonal prism (5); the inner cavity of the outer sleeve (561) is slidably connected to an inner sleeve (562) fixedly connected to the sliding plate (54); and an extrusion spring (563) fixed to the inner sleeve (562) is fixedly mounted on the inner wall of the outer sleeve (561).

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