A device for roughening the processing surface of precast concrete slabs

Abstract

The present invention discloses a device for roughening the surface of precast concrete slabs, which relates to the technical field of concrete roughening treatment. The present invention includes a base, and electric guides are arranged on the outer surface of the upper end of the base near both sides. A support frame including an electric sliding seat is arranged between the two groups of electric guides, and a cylinder is arranged on the outer surface of the upper end of the support frame near the middle. When the present invention rotates the roughening column by setting a rotating rod to perform automatic roughening on the precast slab, it can also drive the movable rod by the rotating rod to drive the cleaning brush to move left and right to clean the concrete adhered to the surface of the corresponding roughening column, which can avoid the concrete on the surface of the roughening column falling into the scraped gully to cause blockage, and can also avoid the uneven surface roughness of the precast slab caused by the different thicknesses of the concrete adhered to the surfaces of different roughening columns, thereby improving the roughening quality of the precast slab.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete roughening treatment, and particularly to a device for surface roughening treatment of precast concrete slabs. Background Art

[0002] In recent years, with the increasing strictness of environmental protection, the demand for prefabricated buildings has been growing day by day. During the production of precast concrete slabs, it is necessary to roughen the upper surface by brooming before the precast floor slab is completely solidified. The purpose is to strengthen the adhesion between the new and old concrete interfaces or between the concrete and other structural layers, so as to better combine with the concrete during the later construction process and form an integral slab for each precast slab.

[0003] Brooming is the most commonly used method in the production of precast slabs. Traditionally, a simple tool such as a rake is used to sweep across the upper surface of the precast slab before it is completely solidified, pulling out grooves to form a rough surface.

[0004] In the prior art (publication number: CN115723234A), a lapping device for a composite floor slab is provided with a cleaning mechanism outside multiple lapping knives. It can not only automatically clean the surface of the precast composite floor slab before lapping treatment to remove surface floating slurry and air bubbles, but also cooperate with a detection piece between two guide shells after the lapping treatment to remove the concrete on its own and outside multiple lapping knives.

[0005] Although the above technical content uses an automated device to perform lapping treatment on precast slabs, there are still some technical defects in actual operation:

[0006] 1. During the process of lapping the precast slab with a lapping column, since the concrete is not completely compacted, a certain amount of concrete will adhere to the surface of the lapping column at this time. Due to different adhesion situations of concrete on the surfaces of different lapping columns, the lapping depth and width on the surface of the precast slab will be affected, thus affecting the lapping quality.

[0007] In addition, the concrete on the surface of the lapping column is likely to fall off during its movement and block the grooves scraped out, further affecting the uniformity of the rough surface.

[0008] 2. During the lapping process of the lapping column, some of the concrete scraped out from the grooves will accumulate on both sides of the grooves. If it is not cleaned in time, concrete protrusions of different sizes will be formed on both sides of the grooves, affecting the overall flatness and strength of the precast slab.

[0009] Therefore, it is very necessary for us to propose a device for surface roughening treatment of precast concrete slabs. Summary of the Invention

[0010] The object of the present invention is to provide a device for roughening the surface of precast concrete slabs to solve the technical defects proposed in the background art.

[0011] To achieve the above object, the present invention adopts the following technical solution: A device for roughening the surface of precast concrete slabs includes a base. Electric guides are provided on both sides of the upper outer surface of the base. A support frame including an electric slide is provided between the two groups of electric guides. A cylinder is provided at the position near the middle of the upper outer surface of the support frame, and the output end of the cylinder penetrates into the interior of the support frame and is fixedly connected to a telescopic rod. One end of the telescopic rod is fixedly connected to a mounting plate, and there is a first motor on the lower outer surface of the mounting plate. The output end of the first motor is fixedly connected to a fixed frame;

[0012] A rotating rod is rotatably connected to the position near the bottom of the interior of the fixed frame, and a number of fixed rings are fixedly connected to the outer surface of the rotating rod at equal intervals. The fixed rings penetrate to the outside of the fixed frame. A number of hair-raising columns are fixedly connected to the outer surface of each fixed ring at equal intervals, and the hair-raising columns are conical;

[0013] A second motor is provided on the outer surface of one side of the fixed frame, and the output end of the second motor penetrates into the interior of the fixed frame and is fixedly connected to the rotating rod. A cleaning mechanism for removing the concrete on the surface of the hair-raising columns is provided between the rotating rod and the fixed frame. A scraping mechanism for cleaning the excess concrete on the surface of the precast slab is provided on the lower outer surface of the fixed frame.

[0014] Further, the cleaning mechanism includes a movable rod, a cleaning plate, a cleaning brush and a limiting block; A movable rod is movably connected to the position near the top of the interior of the fixed frame, and a number of cleaning plates are fixedly connected to the outer surface of the movable rod at equal intervals. The cleaning brush is fixedly connected to the lower outer surface of the cleaning plate, and the cleaning plates correspond to the fixed rings one by one. The cleaning plate is located on one side of the corresponding fixed ring. Both ends of the movable rod penetrate to the outside of the fixed frame and are movably connected thereto, and a limiting block is fixedly connected to one end of the movable rod.

[0015] Further, one end of the rotating rod is fixedly connected to a rotating shaft, and one end of the rotating shaft penetrates to the outside of the fixed frame and is fixedly connected to a connecting block. A traction rod is rotatably connected to one end of the outer surface of the connecting block away from the rotating shaft, and one end of the traction rod away from the connecting block is hinged to a push rod that can move up and down. A limiting rod is fixedly connected to the outer surface of the fixed frame at the position corresponding to the push rod, and one end of the push rod penetrates through the limiting rod and is movably connected thereto.

[0016] Further, a fixed block is fixedly connected to one end of the movable rod away from the limit block. The outer surface of the fixed block on the side away from the fixed frame is inclined downward from top to bottom towards the fixed frame. A first spring is arranged at the position between the limit block and the fixed frame on the outer surface of the movable rod. One end of the first spring is fixedly connected to the limit block, and the other end is fixedly connected to the fixed frame. A ball is embedded and rollingly connected to the top of the limit rod, and the outer surface of the ball is in contact with the outer surface of the fixed block.

[0017] Further, a collection box is fixedly connected at the position between adjacent two groups of fixed rings inside the fixed frame, and the collection box is located above the rotating rod. The bottom end of the inner surface of the collection box is arc-shaped and inclined towards both sides, and the inner surface of the collection box penetrates to the outside of the fixed frame. Baffles are arranged at the positions on the outer surfaces of both sides of the fixed frame corresponding to a plurality of collection boxes.

[0018] Further, the scraping mechanism includes a connection box fixedly connected to the outer surface of the lower end of the fixed frame. A scraping plate is fixedly connected to the outer surface of the connection box close to the hair-raising column, and the outer surface of the scraping plate is inclined at 15 degrees away from the connection block. A plurality of blocking pieces are fixedly connected at equal intervals on the outer surface of the lower end of the scraping plate, and the positions of the blocking pieces correspond to those of the fixed rings.

[0019] Further, a connecting rod is rotatably connected inside the connection box, and one end of the connecting rod penetrates to the outside of the connection box and is fixedly connected to a transmission wheel. A driving wheel is fixedly connected to the outer surface of the rotating shaft. A conveyor belt is connected in transmission between the driving wheel and the transmission wheel. A plurality of scraping components are arranged at equal intervals in a ring shape at the position of the outer surface of the connecting rod inside the connection box.

[0020] Further, the scraping component includes a fixing plate, a scraping plate and a second spring. A plurality of fixing plates are fixedly connected at equal intervals in a ring shape on the outer surface of the connecting rod, and a scraping plate is arranged outside the fixing plate. An activity groove is opened at the position of the outer surface of the scraping plate corresponding to the fixing plate, and the fixing plate penetrates into the activity groove and is movably connected therewith. A second spring is arranged inside the activity groove. One end of the second spring is fixedly connected to the activity groove, and the other end is fixedly connected to the fixing plate.

[0021] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present invention are as follows:

[0022] 1. In the present invention, while the rotating rod drives the hair-raising column to rotate to automatically raise the hair of the precast slab, the rotating rod can also drive the movable rod to drive the cleaning brush to move left and right, so as to clean the concrete adhered to the surface of the corresponding hair-raising column. The removed concrete falls into the interior of the collection box during the shaking of the cleaning brush, which is convenient for collection. Furthermore, it can avoid the concrete on the surface of the hair-raising column from falling into the scraped gully and causing blockage, and can also avoid the uneven surface roughness of the precast slab caused by different thicknesses of concrete adhered to the surfaces of different hair-raising columns, thereby improving the roughening quality of the precast slab;

[0023] 2. In the present invention, by arranging a scraping mechanism at the rear of the hair-raising column, the baffle enters the interior of the gully pulled out by the hair-raising column, which can prevent the concrete pushed out from entering the gully again and causing blockage. And during the movement of the shovel plate along with the fixed frame, the excess concrete on both sides of the gully after hair-raising is scraped. During the rotation of the driving wheel along with the rotating rod, the scraping plate rotates along with the connecting rod, and the concrete on the surface of the shovel plate is brought into the interior of the connecting frame for collection, avoiding some of the concrete brought out by some hair-raising columns from falling on both sides of the gully and affecting the overall flatness of the precast slab, and improving the hair-raising quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is the overall structural schematic diagram of the present invention;

[0025] Figure 2 is the combined view of the fixed frame and the hair-raising column of the present invention;

[0026] Figure 3 is the combined view of the fixed frame and the cleaning mechanism of the present invention;

[0027] Figure 4 is the combined view of the scraping mechanism and the cleaning mechanism of the present invention;

[0028] Figure 5 is the combined view of the scraping mechanism and the hair-raising column of the present invention;

[0029] Figure 6 is the combined view of the scraping plate and the fixed plate of the present invention;

[0030] Figure 7 is the combined view of the collection box and the fixed frame of the present invention.

[0031] Reference numerals: 1, base; 2, electric guide rail; 3, support frame; 4, cylinder; 5, mounting plate; 6, fixed frame; 7, cleaning mechanism; 701, movable rod; 702, cleaning plate; 703, cleaning brush; 704, limit block; 705, rotating shaft; 706, connecting block; 707, traction rod; 708, push rod; 709, limit rod; 710, fixed block; 711, first spring; 712, collection box; 713, baffle; 8, scraping mechanism; 801, connecting frame; 802, scraping plate; 803, retaining piece; 804, connecting rod; 805, driving wheel; 806, driving pulley; 807, conveyor belt; 808, fixing plate; 809, scraper; 810, second spring; 9, rotating rod; 10, fixed ring; 11, roughening post; 12, second motor. Detailed implementation mode

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] Embodiment 1: As Figure 1-3 shown, a device for surface roughening treatment of precast concrete slabs proposed by the present invention includes a base 1. Electric guide rails 2 are arranged on the outer surface of the upper end of the base 1 near both sides. A support frame 3 including an electric slide is arranged between the two electric guide rails 2. A cylinder 4 is arranged on the outer surface of the upper end of the support frame 3 near the middle, and the output end of the cylinder 4 penetrates into the inside of the support frame 3 and is fixedly connected with a telescopic rod;

[0034] One end of the telescopic rod is fixedly connected with a mounting plate 5, and there is a first motor on the outer surface of the lower end of the mounting plate 5. The output end of the first motor is fixedly connected with a fixed frame 6. The precast slab is placed inside the base 1, and the precast slab is directly below the fixed frame 6. According to the moving direction of the support frame 3, the cylinder 4 is controlled to operate. The fixed frame 6 moves downward under the push of the telescopic rod, and the roughening post 11 enters the concrete surface layer of the precast slab. Then, the support frame 3 is controlled to move along the electric guide rail 2 to roughen the surface of the precast slab;

[0035] A rotating rod 9 is rotatably connected to a position near the bottom inside the fixed frame 6, and a number of fixed rings 10 are fixedly connected to the outer surface of the rotating rod 9 at equal intervals. The fixed rings 10 penetrate to the outside of the fixed frame 6. A number of roughening columns 11 are fixedly connected to the outer surface of each group of fixed rings 10 at equal intervals, and the roughening columns 11 are conical. A second motor 12 is arranged on the outer surface of one side of the fixed frame 6, and the output end of the second motor 12 penetrates to the inside of the fixed frame 6 and is fixedly connected to the rotating rod 9. During the movement of the fixed frame 6, the second motor 12 drives the rotating rod 9 to rotate, so that the roughening columns 11 in contact with the precast slab rotate, and the surface of the precast slab is automatically roughened.

[0036] Embodiment 2: As Figure 2-7 shown, the difference between this embodiment and Embodiment 1 is that a cleaning mechanism 7 for removing the concrete on the surface of the roughening column 11 is arranged between the rotating rod 9 and the fixed frame 6. The cleaning mechanism 7 includes a movable rod 701, a cleaning plate 702, a cleaning brush 703 and a limiting block 704;

[0037] A movable rod 701 is movably connected to a position near the top inside the fixed frame 6, and a number of cleaning plates 702 are fixedly connected to the outer surface of the movable rod 701 at equal intervals. A cleaning brush 703 is fixedly connected to the lower outer surface of the cleaning plate 702, and the cleaning plates 702 correspond to the fixed rings 10 one by one. The cleaning plates 702 are located on one side of the corresponding fixed rings 10. Both ends of the movable rod 701 penetrate to the outside of the fixed frame 6 and are movably connected thereto, and a limiting block 704 is fixedly connected to one end of the movable rod 701.

[0038] One end of the rotating rod 9 is fixedly connected to a rotating shaft 705, and one end of the rotating shaft 705 penetrates to the outside of the fixed frame 6 and is fixedly connected to a connecting block 706. One side of the connecting block 706 is rotatably connected to a traction rod 707 at one end far from the rotating shaft 705, and one end of the traction rod 707 far from the connecting block 706 is hinged to a push rod 708 that can move up and down.

[0039] During the rotation of the rotating rod 9, the rotating shaft 705 rotates with it. Due to the change in the height of the connecting block 706, the traction rod 707 pushes and pulls the push rod 708 up and down. A limiting rod 709 is fixedly connected to the outer surface of the fixed frame 6 at a position corresponding to the push rod 708, and one end of the push rod 708 penetrates through the limiting rod 709 and is movably connected thereto.

[0040] A ball is embedded and rollingly connected to the top of the limiting rod 709, and the outer surface of the ball is in contact with the outer surface of the fixed block 710. The thickness of the fixed block 710 gradually decreases from top to bottom, and the outer surface of the fixed block 710 is inclined towards the fixed frame 6 from top to bottom on the side far from the fixed frame 6. Therefore, the fixed block 710 pushes the movable rod 701 to the other side during the upward movement of the push rod 708.

[0041] One end of the movable rod 701 away from the limit block 704 is fixedly connected with a fixed block 710. A first spring 711 is arranged on the outer surface of the movable rod 701 between the limit block 704 and the fixed frame 6. One end of the first spring 711 is fixedly connected with the limit block 704, and the other end is fixedly connected with the fixed frame 6. When the push rod 708 moves downward, the movable rod 701 returns to its original state under the action of the first spring 711. Therefore, during the roughening process of the precast slab by the hair-raising column 11, the movable rod 701 drives the cleaning plate 702 and the cleaning brush 703 to reciprocate and clean the concrete adhered to the surface of the corresponding hair-raising column 11.

[0042] A collection box 712 is fixedly connected inside the fixed frame 6 between two adjacent fixing rings 10, and the collection box 712 is located above the rotating rod 9. The removed concrete falls into the interior of the collection box 712 for collection during the shaking of the cleaning brush 703. The bottom end of the inner surface of the collection box 712 is arc-shaped and inclined to both sides, and the inner surface of the collection box 712 penetrates to the outside of the fixed frame 6. Baffles 713 are arranged at the positions corresponding to several groups of collection boxes 712 on the outer surfaces of both sides of the fixed frame 6. The concrete collected inside the collection box 712 is uniformly processed by opening the baffle 713.

[0043] Embodiment 3: As Figure 3-6 shown, the difference between this embodiment and Embodiment 1 and Embodiment 2 is that the scraping mechanism 8 includes a connection frame 801 fixedly connected to the outer surface of the lower end of the fixed frame 6. Before hair-raising, according to the moving direction of the support frame 3, the first motor is controlled to drive the connection frame 801 to rotate so that the connection frame 801 is located behind the hair-raising column 11;

[0044] A scraping plate 802 is fixedly connected to one side of the outer surface of the connection frame 801 close to the hair-raising column 11, and the outer surface of the scraping plate 802 is inclined 15 degrees away from the connection block 706. The scraping plate 802 scrapes the excess concrete on both sides of the gully after hair-raising. A number of groups of blocking pieces 803 are fixedly connected at equal intervals on the lower outer surface of the scraping plate 802, and the positions of the blocking pieces 803 correspond to those of the fixing rings 10. The blocking pieces 803 are always located behind the hair-raising column 11. Therefore, during the movement of the fixed frame 6, the blocking pieces 803 enter the gully pulled out by the hair-raising column 11 to prevent the pulled-out concrete from entering the gully again and causing blockage.

[0045] A connecting rod 804 is rotatably connected inside the connection frame 801, and one end of the connecting rod 804 penetrates to the outside of the connection frame 801 and is fixedly connected with a transmission wheel 805. A driving wheel 806 is fixedly connected to the outer surface of the rotating shaft 705. A conveyor belt 807 is connected between the driving wheel 806 and the transmission wheel 805. A number of groups of scraping components are arranged in an annular and equidistant manner on the outer surface of the connecting rod 804 inside the connection frame 801.

[0046] The scraping component includes a fixing plate 808, a scraping plate 809, and a second spring 810. A plurality of groups of fixing plates 808 are fixedly connected to the outer surface of the connecting rod 804 at equal intervals in a circular shape. A scraping plate 809 is arranged outside the fixing plate 808. An activity groove is formed at a position corresponding to the outer surface of the scraping plate 809 and the fixing plate 808. The fixing plate 808 penetrates into the interior of the activity groove and is movably connected thereto. A second spring 810 is arranged inside the activity groove. One end of the second spring 810 is fixedly connected to the activity groove, and the other end is fixedly connected to the fixing plate 808;

[0047] Under the action of the second spring 810, the scraping plate 809 is always in contact with the shoveling plate 802. During the rotation of the driving wheel 806 following the rotating rod 9, the transmission wheel 805 drives the connecting rod 804 to rotate behind the hair-raising column 11 under the drive of the conveyor belt 807. The bottom end of the inner surface of the connecting frame 801 inclines away from the shoveling plate 802. The scraping plate 809 brings the concrete scraped from the surface of the shoveling plate 802 into the interior of the connecting frame 801 for collection.

[0048] The working process and principle of the present invention are as follows:

[0049] Step 1: Place the precast slab inside the base 1. The precast slab is located directly below the fixing frame 6. According to the moving direction of the support frame 3, control the first motor to drive the connecting frame 801 to rotate so that the connecting frame 801 is located behind the hair-raising column 11. Then control the cylinder 4 to operate. The fixing frame 6 moves downward under the push of the telescopic rod, and the hair-raising column 11 enters the concrete surface layer of the precast slab. Then control the support frame 3 to move along the electric guide rail 2 to roughen the surface of the precast slab;

[0050] Step 2: During the movement of the fixing frame 6, the second motor 12 drives the rotating rod 9 to rotate, so that the hair-raising column 11 in contact with the precast slab rotates from below the fixing ring 10 towards the connecting frame 801, thereby realizing automatic hair-raising of the surface of the precast slab;

[0051] Step 3: During the rotation of the rotating rod 9, the rotating shaft 705 rotates with it. The traction rod 707 pushes and pulls the push rod 708 up and down due to the change in the height of the connecting block 706. Since the thickness of the fixing block 710 gradually decreases from top to bottom and the side of the outer surface of the fixing block 710 close to the push rod 708 is an inclined surface, the fixing block 710 pushes the movable rod 701 to the other side during the upward movement of the push rod 708;

[0052] Step 4: When the push rod 708 moves downward, the movable rod 701 returns to its original state under the action of the first spring 711. Therefore, during the roughening process of the precast slab by the roughening column 11, the movable rod 701 drives the cleaning plate 702 and the cleaning brush 703 to reciprocate, and cleans the concrete adhered to the surface of the corresponding roughening column 11. The cleaned concrete falls into the interior of the collection box 712 during the shaking of the cleaning brush 703 for collection. Finally, the baffle 713 is opened to uniformly process the concrete collected inside the collection box 712. By automatically roughening the precast slab using the roughening column 11, it is also possible to use the left and right movement of the cleaning brush 703 to clean the concrete on the surface of the roughening column 11 after roughening, avoiding uneven surface roughness of the precast slab caused by different thicknesses of concrete adhered to the surfaces of different roughening columns 11, thereby affecting the overall performance of the precast slab;

[0053] Step 5: The retaining piece 803 enters the gully pulled out by the roughening column 11 to prevent the pulled-out concrete from re-entering the gully and causing blockage. The shovel plate 802 shovels the excess concrete on both sides of the gully after roughening. During the rotation of the driving wheel 806 with the rotating rod 9, the transmission wheel 805 drives the connecting rod 804 to rotate behind the roughening column 11 under the drive of the conveyor belt 807, and the scraping plate 809 brings the shoveled concrete on the surface of the shovel plate 802 into the interior of the connecting frame 801 for collection.

[0054] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A device for roughening the processing surface of precast concrete slabs, comprising a base, wherein electric guide rails are arranged on the outer surface of the upper end of the base near both sides, and a support frame including an electric sliding seat is arranged between the two groups of electric guide rails, characterized in that, A cylinder is provided at a position near the middle on the outer surface of the upper end of the support frame, and the output end of the cylinder penetrates into the interior of the support frame and is fixedly connected to a telescopic rod. One end of the telescopic rod is fixedly connected to a mounting plate, and there is a first motor on the lower outer surface of the mounting plate. The output end of the first motor is fixedly connected to a fixed frame; A rotating rod is rotatably connected at a position near the bottom inside the fixed frame, and a number of fixed rings are fixedly connected to the outer surface of the rotating rod at equal intervals. The fixed rings penetrate to the outside of the fixed frame. A number of hair-raising columns are fixedly connected to the outer surface of each group of fixed rings at equal intervals, and the hair-raising columns are conical; A second motor is provided on the outer surface of one side of the fixed frame, and the output end of the second motor penetrates into the interior of the fixed frame and is fixedly connected to the rotating rod. A cleaning mechanism for removing the concrete on the surface of the hair-raising columns is provided between the rotating rod and the fixed frame. A scraping mechanism for cleaning the excess concrete on the surface of the precast slab is provided on the lower outer surface of the fixed frame; The cleaning mechanism includes a movable rod, a cleaning plate, a cleaning brush and a limiting block; a movable rod is movably connected at a position near the top inside the fixed frame, and a number of cleaning plates are fixedly connected to the outer surface of the movable rod at equal intervals. A cleaning brush is fixedly connected to the lower outer surface of the cleaning plate. The scraping mechanism includes a connecting frame fixedly connected to the lower outer surface of the fixed frame, and a scraping plate is fixedly connected to the outer surface of the connecting frame on one side close to the hair-raising column.

2. A device for roughening the processing surface of precast concrete slabs according to claim 1, characterized in that, The cleaning plates correspond to the fixed rings one by one. The cleaning plates are located on one side of the corresponding fixed rings. Both ends of the movable rod penetrate to the outside of the fixed frame and are movably connected thereto, and a limiting block is fixedly connected to one end of the movable rod.

3. A device for roughening the processing surface of precast concrete slabs according to claim 2, characterized in that, One end of the rotating rod is fixedly connected to a rotating shaft, and one end of the rotating shaft penetrates to the outside of the fixed frame and is fixedly connected to a connecting block. A traction rod is rotatably connected to one end of the outer surface of the connecting block away from the rotating shaft, and one end of the traction rod away from the connecting block is hinged to a push rod that can move up and down. A limiting rod is fixedly connected to the outer surface of the fixed frame at a position corresponding to the push rod, and one end of the push rod penetrates through the limiting rod and is movably connected thereto.

4. A device for roughening the processing surface of precast concrete slabs according to claim 3, characterized in that, A fixed block is fixedly connected to the end of the movable rod away from the limiting block. The outer surface of the fixed block is inclined from top to bottom towards the fixed frame. A first spring is provided at a position between the limiting block and the fixed frame on the outer surface of the movable rod. One end of the first spring is fixedly connected to the limiting block, and the other end is fixedly connected to the fixed frame. A ball is embedded and rotatably connected to the top of the limiting rod, and the outer surface of the ball is attached to the outer surface of the fixed block.

5. A surface roughening treatment device for processing concrete precast slabs according to claim 1, characterized in that, A collection box is fixedly connected at a position between two adjacent groups of fixed rings inside the fixed frame, and the collection box is located above the rotating rod. The bottom end of the inner surface of the collection box is arc-shaped and inclined towards both sides, and the inner surface of the collection box penetrates to the outside of the fixed frame. Baffles are provided on the outer surfaces of both sides of the fixed frame at positions corresponding to a number of collection boxes.

6. A device for roughening the processing surface of precast concrete slabs according to claim 1, characterized in that, The outer surface of the scraping plate is inclined at 15 degrees in the direction away from the connecting block. A number of blocking pieces are fixedly connected to the lower outer surface of the scraping plate at equal intervals, and the blocking pieces correspond to the positions of the fixed rings.

7. A device for roughening the processing surface of precast concrete slabs according to claim 6, characterized in that, A connecting rod is rotatably connected inside the connecting frame, and one end of the connecting rod penetrates to the outside of the connecting frame and is fixedly connected with a driving wheel. A driving wheel is fixedly connected to the outer surface of the rotating shaft. A conveyor belt is connected between the driving wheel and the driving wheel. A plurality of groups of scraping components are arranged at equal intervals in a ring shape on the outer surface of the connecting rod at a position inside the connecting frame.

8. A device for surface roughening treatment of precast concrete slabs according to claim 7, characterized in that, The scraping component includes a fixing plate, a scraping plate and a second spring. A plurality of groups of fixing plates are fixedly connected to the outer surface of the connecting rod at equal intervals in a ring shape, and a scraping plate is arranged outside the fixing plate. An activity groove is formed at a position corresponding to the outer surface of the scraping plate and the fixing plate, and the fixing plate penetrates into the inside of the activity groove and is movably connected with it. A second spring is arranged inside the activity groove, and one end of the second spring is fixedly connected to the activity groove, and the other end is fixedly connected to the fixing plate.

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