A building engineering concrete prefabricated slab processing device

Abstract

The utility model discloses a building engineering concrete prefabricated slab processing device. The utility model discloses a support leg no.

Description

Technical Field

[0001] This utility model relates to the technical field of precast concrete slab processing equipment, specifically a precast concrete slab processing device for building engineering. Background Technology

[0002] In the field of construction engineering, precast concrete slabs are widely used in the construction of floor slabs, wall panels, balcony slabs, and other components due to their advantages such as high construction efficiency, stable quality, energy saving, and environmental protection. The core processing steps for precast concrete slabs include mold forming, rebar embedding, concrete pouring, vibration compaction, curing, and demolding. Among these, the forming accuracy, vibration uniformity, and ease of demolding directly determine the structural strength and installation compatibility of the precast slab. To facilitate the movement of precast slabs during production, specialized moving platforms are typically used, where the precast slab frame is placed on the moving platform for production.

[0003] However, traditional precast concrete slab production equipment usually requires manual cleaning of the moving platform. After the precast concrete slab is removed from the moving platform, some concrete blocks remain. These remaining concrete blocks need to be manually knocked off and cleaned, which is very labor-intensive and has low cleaning efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a precast concrete slab processing device for building engineering, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a precast concrete slab processing device for building engineering, comprising: a support leg, wherein multiple sets of the support leg are arranged in two rows, and a rotating wheel is rotatably connected to the side of each row of support legs that is close to each other; a fixing plate is fixedly connected to both the front and rear sides of the support leg; a screw is rotatably connected to the top surface of the fixing plate; the fixing plate is fixed to the factory floor by the screw; a connecting plate is fixedly connected to the top surface of each row of support legs; a movable platform is slidably connected between the two sets of connecting plates; the bottom surface of the movable platform is in contact with the circumferential side of the rotating wheel; a pushing mechanism is provided at the bottom of the movable platform; a precast frame is slidably connected to the top surface of the movable platform; and a platform cleaning mechanism is provided on the top surface of the two sets of connecting plates.

[0006] Furthermore, the pushing mechanism includes two support legs, a mounting frame, a rotating rod, a stepper motor, gears, a toothed belt, a lever, and a limiting frame. Two sets of support legs are provided, and their structure is identical to that of support legs one. They are fixedly installed on the factory floor in the same manner as support legs one. The mounting frame is fixedly connected to the top surfaces of the two sets of support legs. The rotating rod is rotatably connected to the inner side of the mounting frame, and two sets of rotating rods are provided. The stepper motor is fixedly installed on the right side of the mounting frame, and its output end is fixedly connected to one set of rotating rods. The gear is fixedly connected to the circumference of the rotating rod. The toothed belt is connected between the two sets of gears, and the toothed belt meshes with both sets of gears. The lever is fixedly connected to the circumference of the toothed belt. The limiting frame is slidably connected to the circumference of the lever and fixedly connected to the bottom surface of the moving platform.

[0007] Furthermore, the countertop cleaning mechanism includes columns, a second rotating rod, a second stepper motor, a fixing block, an extension plate, a third rotating rod, a crushing steel ring, another extension plate, a scraper, another extension plate, a fourth rotating rod, rollers, and a brush. Two sets of columns are provided, each fixedly connected to the top surface of an adjacent connecting plate. The second rotating rod is rotatably connected between the two sets of columns. The second stepper motor is fixedly installed on the right side of the right-side set of columns. Two fixing blocks are fixedly connected to the circumference of the second rotating rod. Two sets of extension plates are provided, each fixedly connected to the circumference of an adjacent set of fixing blocks. The rotating rod three is rotatably connected between two sets of extension plates one. The crushing steel ring is fixedly connected to the circumference of the rotating rod three, and multiple sets of crushing steel rings are provided. Two sets of extension plates two are provided, and the two sets of extension plates two are respectively fixedly connected to the circumference of adjacent fixed blocks. The scraper is fixedly connected between two sets of extension plates two. Two sets of extension plates three are provided, and the two sets of extension plates three are respectively fixedly connected to the circumference of adjacent fixed blocks. The rotating rod four is rotatably connected between two sets of extension plates three. The rollers are fixedly connected to the circumference of the rotating rod, and two sets of rollers are provided. The brushes are fixedly connected to the circumference of the rotating rod, and multiple sets of brushes are provided.

[0008] Furthermore, the countertop cleaning mechanism also includes an extension plate four, a rotating rod five, a rotating ring, and a stainless steel sheet. There are two sets of extension plates four, and the two sets of extension plates four are respectively fixedly connected to the peripheral side of adjacent fixed blocks. The rotating rod five is rotatably connected between the two sets of extension plates four. The rotating ring is rotatably connected to the peripheral side of the rotating rod five, and there are multiple sets of rotating rings. The stainless steel sheet is fixedly connected to the peripheral side of the rotating ring.

[0009] Furthermore, two sets of support columns are fixedly connected to the top surface of each of the two sets of connecting plates, and hoppers are fixedly connected between the four sets of support columns.

[0010] Furthermore, a feeding pipe is fixedly connected to the bottom of the hopper, and a rotating roller is rotatably connected inside the feeding pipe. Four sets of baffles are fixedly connected to the circumferential side of the rotating roller, and the four sets of baffles are arranged in a ring on the circumferential side of the rotating roller. A stepper motor is fixedly installed on the right side of the feeding pipe, and the output end of the stepper motor is fixedly connected to the rotating roller.

[0011] Furthermore, limit rods are fixedly connected to both the left and right sides of the feeding tube, and limit plates are slidably connected to the periphery of the limit rods. A baffle is fixedly connected to the bottom surface of the limit plate, and the baffle is slidably connected to the bottom end of the feeding tube.

[0012] Furthermore, two sets of side plates are fixedly connected to the front of the feed pipe, and positive and negative threaded rods are rotatably connected between the two sets of side plates. A stepper motor four is fixedly installed on the right side of the right set of side plates. The output end of the stepper motor four is fixedly connected to the positive and negative threaded rods. Two sets of moving plates are threadedly connected to the circumferential side of the positive and negative threaded rods. The two sets of moving plates are respectively fixedly connected to the adjacent baffles.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention utilizes a stepper motor to drive a rotating rod, which in turn drives a gear-driven toothed belt transmission. The rotation of the toothed belt, via a lever and a limiting frame, moves the moving platform. A stepper motor drives a forward and reverse threaded rod to adjust the distance between two sets of moving plates. These moving plates move baffles, and by moving the two sets of baffles closer together or further apart, the discharge width of the feeding pipe can be adjusted to precisely match the width of the precast frame, preventing concrete spillage. A stepper motor drives a rotating roller to control the amount of material discharged from the bottom of the feeding pipe. This structure allows for controlled feeding and ensures the feeding width matches the width of the precast frame. A stepper motor drives a rotating roller... Rotating rod two allows the fixed block to rotate synchronously. When rotating rod five rotates to the bottom, the concrete inside the precast frame passes under the stainless steel plate, which scratches anti-slip lines on the top surface of the concrete. When rotating rod three rotates to the bottom, the moving platform passes under the crushing steel ring, which crushes the concrete blocks remaining on the top surface of the moving platform. When the scraper rotates to the bottom, it scrapes the top surface of the moving platform that the bottom passes through. When rotating rod four is at the bottom, the brush cleans the concrete powder on the top surface of the moving platform that the bottom passes through. This structure facilitates the cleaning of concrete blocks remaining on the top surface of the moving platform and has high cleaning efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the front view structure in one embodiment of the present invention;

[0016] Figure 2 for Figure 1 Schematic diagram of the intermediate rotating wheel;

[0017] Figure 3 for Figure 1 Schematic diagram of the countertop cleaning mechanism;

[0018] Figure 4 for Figure 1 A schematic diagram of the central propulsion mechanism;

[0019] Figure 5 for Figure 1 Schematic diagram of the bottom components of the intermediate hopper;

[0020] Figure 6 for Figure 5 Schematic diagram of the right-side cross-sectional structure of the feed pipe.

[0021] Attached reference numerals: 1. Support leg one; 2. Rotary wheel; 3. Fixing plate; 4. Screw; 5. Connecting plate; 6. Moving platform; 7. Pushing mechanism; 71. Support leg two; 72. Mounting frame; 73. Rotating rod one; 74. Stepper motor one; 75. Gear; 76. Toothed belt; 77. Pulley; 78. Limiting frame; 8. Prefabricated frame; 9. Tabletop cleaning mechanism; 91. Column; 92. Rotating rod two; 93. Stepper motor two; 94. Fixing block; 95. Extension plate one; 96. Rotating rod three; 97. Crushing steel ring; 98. Extension plate two; 99. Scraper; 910. Extension plate three; 911. Rotating rod four; 912. Roller; 913. Brush; 914. Extension plate four; 915. Rotating rod five; 916. Rotary ring; 917. Stainless steel sheet; 10. Support column; 11. Hopper; 12. Feed pipe; 13. Rotating roller; 14. Baffle plate; 15. Stepper motor three; 16. Limiting rod; 17. Limiting plate; 18. Baffle plate; 19. Side plate; 20. Positive and negative threaded rod; 21. Stepper motor four; 22. Moving plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please refer to the following: Figures 1-6 ,in Figure 1 This is a schematic diagram of the front view structure in one embodiment of the present invention; Figure 2 for Figure 1 Schematic diagram of the intermediate rotating wheel; Figure 3 for Figure 1 Schematic diagram of the countertop cleaning mechanism; Figure 4 for Figure 1 A schematic diagram of the central propulsion mechanism; Figure 5for Figure 1 Schematic diagram of the bottom components of the intermediate hopper; Figure 6 for Figure 5 A schematic diagram of the right-side cross-sectional structure of the feed pipe, a precast concrete slab processing device for building engineering, includes: support legs 1, multiple sets of support legs 1 arranged in two rows, with a rotating wheel 2 rotatably connected to the side of each row of support legs 1 that is close to each other, fixing plates 3 fixedly connected to the front and rear sides of support legs 1, screws 4 rotatably connected to the top surface of fixing plates 3, fixing plates 3 to the factory floor by screws 4, connecting plates 5 fixedly connected to the top surface of each row of support legs 1, a movable platform 6 slidably connected between the two sets of connecting plates 5, the bottom surface of the movable platform 6 fitting against the circumference of the rotating wheel 2, a pushing mechanism 7 provided at the bottom of the movable platform 6, a precast frame 8 slidably connected to the top surface of the movable platform 6, a platform cleaning mechanism 9 provided on the top surface of the two sets of connecting plates 5, the precast frame 8 being spliced ​​from four side plates, the side plates being detachably connected by bolts, and the precast frame 8 being disassembled and removed after the precast concrete slab has dried and formed.

[0024] The driving mechanism 7 includes two sets of support legs 71, a mounting frame 72, a rotating rod 73, a stepper motor 74, a gear 75, a toothed belt 76, a lever 77, and a limiting frame 78. Two sets of support legs 71 are provided, and their structure is identical to that of support leg 1. They are also fixedly installed on the factory floor in the same manner as support leg 1. The mounting frame 72 is fixedly connected to the top surface of the two sets of support legs 71. Two sets of rotating rods 73 are rotatably connected to the inner side of the mounting frame 72. The stepper motor 74 is fixedly mounted... Mounted on the right side of the mounting frame 72, the output end of the stepper motor 74 is fixedly connected to a set of rotating rods 73, the gear 75 is fixedly connected to the circumferential side of the rotating rod 73, the toothed belt 76 is driven between the two sets of gears 75 and meshes with the two sets of gears 75, the toggle block 77 is fixedly connected to the circumferential side of the toothed belt 76, the limiting frame 78 is slidably connected to the circumferential side of the toggle block 77, and the limiting frame 78 is fixedly connected to the bottom surface of the moving platform 6. The toggle block 77 drives the limiting frame 78 to move, so that the moving platform 6 can move synchronously on the top surface of the rotating wheel 2.

[0025] The countertop cleaning mechanism 9 includes columns 91, a second rotating rod 92, a second stepper motor 93, a fixing block 94, an extension plate 95, a third rotating rod 96, a crushing steel ring 97, an extension plate 98, a scraper 99, an extension plate 910, a fourth rotating rod 911, a roller 912, and a brush 913. Two sets of columns 91 are provided, each fixedly connected to the top surface of an adjacent connecting plate 5. The second rotating rod 92 is rotatably connected between the two sets of columns 91. The second stepper motor 93 is fixedly installed on the right side of the right set of columns 91. The fixing block 94 is fixedly connected to the circumference of the second rotating rod 92, and two sets of fixing blocks 94 are provided. Two sets of extension plates 95 are provided, each fixedly connected to the circumference of an adjacent set of fixing blocks 94. The third rotating rod 96 is rotatably connected between the two sets of extension plates 95. The crushing steel ring 97 is fixedly connected to the circumference of the third rotating rod 96. Multiple sets of crushing steel rings 97 are provided, two sets of extension plates 2 98 are provided, and the two sets of extension plates 2 98 are respectively fixedly connected to the circumferential side of adjacent fixed blocks 94. Scraper 99 is fixedly connected between the two sets of extension plates 2 98. Two sets of extension plates 3 910 are provided, and the two sets of extension plates 3 910 are respectively fixedly connected to the circumferential side of adjacent fixed blocks 94. Rotating rod 4 911 is rotatably connected between the two sets of extension plates 3 910. Roller 912 is fixedly connected to the circumferential side of rotating rod 4 911, and two sets of roller 912 are provided. Brush 913 is fixedly connected to the circumferential side of rotating rod 4 911, and multiple sets of brush 913 are provided. Brush 913 is made of nylon filament material with moderate hardness and wear resistance. The end of brush 913 away from rotating rod 4 911 extends 5 mm beyond the circumferential side of roller 912, which can ensure that when roller 912 rolls along the top surface of moving platform 6, brush 913 is in contact with the top surface of moving platform 6.

[0026] The countertop cleaning mechanism 9 also includes an extension plate 914, a rotating rod 915, a rotating ring 916, and a stainless steel sheet 917. There are two sets of extension plates 914, which are fixedly connected to the sides of adjacent fixed blocks 94. The rotating rod 915 is rotatably connected between the two sets of extension plates 914. The rotating ring 916 is rotatably connected to the sides of the rotating rod 915, and there are multiple sets of rotating rings 916. The stainless steel sheet 917 is fixedly connected to the sides of the rotating ring 916. When the stainless steel sheet 917 is not in contact with an obstacle, it hangs down naturally.

[0027] Two sets of support columns 10 are fixedly connected to the top surfaces of the two sets of connecting plates 5, and hoppers 11 are fixedly connected between the four sets of support columns 10.

[0028] A feeding pipe 12 is fixedly connected to the bottom of the hopper 11. A rotating roller 13 is rotatably connected inside the feeding pipe 12. Four sets of baffles 14 are fixedly connected to the side of the rotating roller 13. The four sets of baffles 14 are arranged in a ring around the side of the rotating roller 13. A stepper motor 3 15 is fixedly installed on the right side of the feeding pipe 12. The output end of the stepper motor 3 15 is fixedly connected to the rotating roller 13.

[0029] Limiting rods 16 are fixedly connected to both the left and right sides of the feeding pipe 12. Limiting plates 17 are slidably connected to the sides of the limiting rods 16. A baffle 18 is fixedly connected to the bottom surface of the limiting plate 17. The baffle 18 is slidably connected to the bottom end of the feeding pipe 12 and can block the bottom opening of the feeding pipe 12.

[0030] Two sets of side plates 19 are fixedly connected to the front of the feed pipe 12. A positive and negative threaded rod 20 is rotatably connected between the two sets of side plates 19. A stepper motor 21 is fixedly installed on the right side of the right set of side plates 19. The output end of the stepper motor 21 is fixedly connected to the positive and negative threaded rod 20. Two sets of moving plates 22 are threadedly connected to the circumference of the positive and negative threaded rod 20. The two sets of moving plates 22 are fixedly connected to the adjacent baffles 18 respectively.

[0031] In summary, the precast concrete slab processing device for building engineering provided by this utility model first rotates the rotating rod 92 via stepper motor 2 93, keeping the extension plate 95 at a 45° angle to the ground. Then, the precast frame 8 is manually assembled and placed upright on the top surface of the moving platform 6. Stepper motor 1 74 rotates the rotating rod 73, which drives the toothed belt 76 via gear 75. The toothed belt 76, through the cooperation of the lever 77 and the limiting frame 78, can move the moving platform 6 between the two sets of connecting plates 5, thereby moving the precast frame 8 below the feeding pipe 12. Stepper motor 4 21 rotates the forward and reverse threaded rod 20, which can move the two sets of moving plates 22 along the forward and reverse directions. The threaded rods 20 are brought closer together, thereby bringing the two sets of baffles 18 closer together. By moving the two sets of baffles 18 closer together or further apart, the discharge width of the discharge pipe 12 can be adjusted to match the width of the precast frame 8, preventing concrete spillage. The stepper motor 15 rotates, which drives the rotating roller 13 to rotate. The rotating roller 13 drives the baffle plate 14 to rotate, which controls the concrete inside the hopper 11 to be discharged from the bottom of the discharge pipe 12. The moving platform 6 moves the precast frame 8 backward at a uniform speed, which allows the concrete to flow evenly into the inside of the precast frame 8. After the concrete inside the precast frame 8 is poured, the precast frame 8 is moved behind the platform cleaning mechanism 9, and then the concrete is manually vibrated with a vibrator. The vibrated concrete is then left to stand. Half an hour later, stepper motor 293 drives rotating rod 292 to rotate rotating rod 5915 to the lowest position. At this time, moving platform 6 forward allows the precast frame 8 and the concrete inside the precast frame 8 to move forward synchronously. When the concrete inside the precast frame 8 passes the bottom of stainless steel plate 917, the bottom of stainless steel plate 917 can scratch a thin line on the top surface of the not-completely-dry concrete inside the precast frame 8. This thin line can increase the friction of the precast concrete slab. When the precast concrete slab is completely dry, the precast frame 8 can be disassembled and the precast concrete slab can be lifted away by a crane. At this time, rotating rod 396 is rotated to the bottom, and moving platform 6 is moved backward again. When moving platform 6 moves to the broken steel ring 97... When the platform is at its lowest position, the crushing steel ring 97 can contact the top surface of the moving platform 6. At this time, the rolling and squeezing of the crushing steel ring 97 can crush the concrete blocks remaining on the surface of the moving platform 6. When the moving platform 6 moves to the last position, the scraper 99 is rotated to the bottom. At this time, the moving platform 6 is moved forward so that the scraper 99 can scrape the top surface of the moving platform 6, and the concrete on the top surface of the moving platform 6 can be scraped off. When the rotating rod 4 911 is rotated to the bottom, the moving platform 6 passes under the rotating rod 4 911 so that the roller 912 contacts the top surface of the moving platform 6. At this time, the moving platform 6 drives the roller 912 to rotate, and the roller 912 drives the rotating rod 4 911 to rotate. The rotation of the rotating rod 4 911 can drive the brush 913 to clean the top surface of the moving platform 6.

Claims

1. A processing device for precast concrete slabs in building construction, characterized in that, include: Support leg 1 (1), the support leg 1 (1) is provided in multiple sets, the multiple sets of support leg 1 (1) are arranged in two rows, and the two rows of support leg 1 (1) are rotatably connected to the side of each other. The support leg 1 (1) is fixedly connected to the front and rear sides with fixed plates (3). The top surface of the fixed plate (3) is rotatably connected with screws (4). The fixed plate (3) is fixed to the factory floor by screws (4). The top surface of the two rows of support leg 1 (1) is fixedly connected with connecting plates (5). The two sets of connecting plates (5) are slidably connected with a moving platform (6). The bottom surface of the moving platform (6) is in contact with the side of the rotating wheel (2). The bottom of the moving platform (6) is provided with a pushing mechanism (7). The top surface of the moving platform (6) is slidably connected with a prefabricated frame (8). The top surface of the two sets of connecting plates (5) is provided with a table cleaning mechanism (9).

2. The precast concrete slab processing device for building engineering according to claim 1, characterized in that, The pushing mechanism (7) includes two sets of support legs (71), a mounting frame (72), a rotating rod (73), a stepper motor (74), a gear (75), a toothed belt (76), a lever (77), and a limiting frame (78). Two sets of support legs (71) are provided. The structure of support legs (71) is the same as that of support legs (1), and they are fixedly installed on the factory floor in the same manner as support legs (1). The mounting frame (72) is fixedly connected to the top surface of the two sets of support legs (71). The rotating rod (73) is rotatably connected to the inside of the mounting frame (72), and the rotating rod (73) is provided with… Two sets are provided. The first stepper motor (74) is fixedly installed on the right side of the mounting frame (72), and the output end of the first stepper motor (74) is fixedly connected to a set of rotating rods (73). The gear (75) is fixedly connected to the circumferential side of the rotating rod (73). The toothed belt (76) is driven between the two sets of gears (75), and the toothed belt (76) meshes with the two sets of gears (75). The paddle block (77) is fixedly connected to the circumferential side of the toothed belt (76). The limiting frame (78) is slidably connected to the circumferential side of the paddle block (77). The limiting frame (78) is fixedly connected to the bottom surface of the moving platform (6).

3. The precast concrete slab processing device for building engineering according to claim 1, characterized in that, The countertop cleaning mechanism (9) includes a column (91), a second rotating rod (92), a second stepper motor (93), a fixing block (94), an extension plate (95), a third rotating rod (96), a crushing steel ring (97), an extension plate (98), a scraper (99), an extension plate (910), a fourth rotating rod (911), a roller (912), and a brush (913). Two sets of columns (91) are provided, and the two sets of columns (91) are fixedly connected to the top surfaces of adjacent connecting plates (5). The second rotating rod (92) is rotatably connected between the two sets of columns (91). The second stepper motor (93) is fixedly installed on the right side of the right set of columns (91). The fixing block (94) is fixedly connected to the circumferential side of the second rotating rod (92), and two sets of fixing blocks (94) are provided. Two sets of extension plates (95) are provided, and the two sets of extension plates (95) are fixedly connected to two adjacent sets of fixing blocks (94). On the circumferential side, the rotating rod three (96) is rotatably connected between two sets of extension plates one (95), the crushing steel ring (97) is fixedly connected to the circumferential side of the rotating rod three (96), and multiple sets of crushing steel rings (97) are provided. Two sets of extension plates two (98) are provided, and the two sets of extension plates two (98) are respectively fixedly connected to the circumferential side of adjacent fixed blocks (94). The scraper (99) is fixedly connected between the two sets of extension plates two (98), and the extension plate three... (910) is provided in two sets, and the two sets of extension plates (910) are respectively fixedly connected to the side of the adjacent fixed block (94). The rotating rod (911) is rotatably connected between the two sets of extension plates (910). The roller (912) is fixedly connected to the side of the rotating rod (911), and there are two sets of rollers (912). The brush (913) is fixedly connected to the side of the rotating rod (911), and there are multiple sets of brushes (913).

4. The precast concrete slab processing device for building engineering according to claim 3, characterized in that, The countertop cleaning mechanism (9) further includes an extension plate four (914), a rotating rod five (915), a rotating ring (916), and a stainless steel sheet (917). The extension plate four (914) is provided in two sets, and the two sets of extension plates four (914) are respectively fixedly connected to the periphery of adjacent fixed blocks (94). The rotating rod five (915) is rotatably connected between the two sets of extension plates four (914). The rotating ring (916) is rotatably connected to the periphery of the rotating rod five (915), and multiple sets of rotating rings (916) are provided. The stainless steel sheet (917) is fixedly connected to the periphery of the rotating ring (916).

5. The precast concrete slab processing device for building engineering according to claim 1, characterized in that, Two sets of support columns (10) are fixedly connected to the top surface of the two sets of connecting plates (5), and hoppers (11) are fixedly connected between the four sets of support columns (10).

6. The precast concrete slab processing device for building engineering according to claim 5, characterized in that, The bottom of the hopper (11) is fixedly connected to a feeding pipe (12), and a rotating roller (13) is rotatably connected inside the feeding pipe (12). Four sets of baffle plates (14) are fixedly connected to the circumference of the rotating roller (13). The four sets of baffle plates (14) are arranged in a ring around the circumference of the rotating roller (13). A stepper motor (15) is fixedly installed on the right side of the feeding pipe (12), and the output end of the stepper motor (15) is fixedly connected to the rotating roller (13).

7. The precast concrete slab processing device for building engineering according to claim 6, characterized in that, Limiting rods (16) are fixedly connected to both the left and right sides of the feeding tube (12). A limiting plate (17) is slidably connected to the periphery of the limiting rod (16). A baffle (18) is fixedly connected to the bottom surface of the limiting plate (17). The baffle (18) is slidably connected to the bottom end of the feeding tube (12).

8. A precast concrete slab processing device for building engineering according to claim 6, characterized in that, The feed tube (12) is fixedly connected to two sets of side plates (19) on the front. A positive and negative threaded rod (20) is rotatably connected between the two sets of side plates (19). A stepper motor (21) is fixedly installed on the right side of the set of side plates (19). The output end of the stepper motor (21) is fixedly connected to the positive and negative threaded rod (20). Two sets of moving plates (22) are threadedly connected to the circumferential side of the positive and negative threaded rod (20). The two sets of moving plates (22) are fixedly connected to the adjacent baffle (18) respectively.

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