An aggregate screening device for recycled ultra-high performance concrete

Abstract

This application relates to the field of concrete aggregate technology and discloses a screening device for recycled ultra-high performance concrete aggregates, including an outer shell and a box. The outer shell is located at the upper end of the box, and the outer shell and the box are connected. A screen cylinder is installed inside the outer shell. This screening device for recycled ultra-high performance concrete aggregates utilizes an industrial camera, a controller, and a replacement mechanism. The industrial camera monitors the surface blockage of the screen cylinder in real time, and combined with the controller's image processing function, intelligently identifies the degree of blockage in the screen holes. When a blockage signal is detected, the controller automatically activates an electric push rod to press down, driving an arc-shaped cleaning plate to adhere to the outer wall of the screen cylinder. As the screen cylinder rotates, the arc-shaped cleaning plate removes blockages through scraping action, achieving automated cleaning, significantly reducing downtime for cleaning, and improving production continuity. The industrial camera lens is made of diamond-coated material, which is wear-resistant and stain-resistant, adaptable to the high-dust environment of concrete aggregate screening, and ensures long-term stable monitoring.

Description

Technical Field

[0001] This application relates to the field of concrete aggregate technology, specifically to an aggregate screening device for recycled ultra-high performance concrete. Background Technology

[0002] Recycled concrete refers to new concrete made by crushing, cleaning, and grading waste concrete blocks, mixing them with aggregates in a certain proportion, and partially or completely replacing natural aggregates such as sand and gravel (mainly coarse aggregates), and then adding cement, water, etc. When using recycled concrete aggregates, screening devices are required for screening.

[0003] An existing patent (publication number: CN222369651U) discloses a screening device for aggregates in recycled ultra-high performance concrete, belonging to the field of concrete aggregate technology. It includes an outer shell, with a box connected to the bottom of the outer shell via a feeding channel. A screen cylinder is rotatably mounted inside the outer shell. Fixed discs are mounted on both sides of the outer shell, and the two ends of the screen cylinder are rotatably connected to the fixed discs on both sides. A rotating rod is rotatably mounted between the two fixed discs, and a spiral conveying blade is mounted on the rotating rod, cooperating with the inner cavity of the screen cylinder to facilitate the conveying of aggregates. A second gear is mounted on the outer wall of the screen cylinder, and a first gear meshes with the lower side of the second gear, facilitating the conveying of aggregates while simultaneously driving the screen cylinder to rotate, effectively improving the screening effect of the screen cylinder on aggregates. A secondary screening component is mounted on the box to facilitate secondary screening of the aggregates screened by the screen cylinder, further improving the device's screening effect on recycled concrete aggregates.

[0004] While the devices described in the aforementioned comparative documents improve the screening effect of recycled concrete aggregates, the screen cylinders of these devices are prone to screen hole blockage after prolonged operation, leading to a decrease in screening efficiency and requiring frequent shutdowns for cleaning, which affects production continuity. In addition, the aforementioned secondary screen plates adopt a fixed installation structure, and when it is necessary to adjust the aggregate grading specifications or perform maintenance, the disassembly and replacement process is cumbersome and cannot quickly adapt to different working conditions. Therefore, an aggregate screening device for recycled ultra-high performance concrete is provided. Utility Model Content

[0005] To address the shortcomings of existing technologies, this application provides an aggregate screening device for recycled ultra-high performance concrete, which features easy automatic cleaning of the screen cylinder, avoidance of clogging, and easy screen plate replacement.

[0006] To achieve the above objectives, this application provides the following technical solution: an aggregate screening device for recycled ultra-high performance concrete, comprising an outer shell and a box, the outer shell being disposed at the upper end of the box and connected to the box, a screen cylinder being disposed inside the outer shell, the screen cylinder having screen holes on its surface, the left and right ends of the screen cylinder extending to the outside of the outer shell and rotatably connected to the outer shell, an electric push rod being disposed at the upper end of the outer shell, an arc-shaped cleaning plate being disposed at the lower end of the electric push rod, the arc-shaped cleaning plate being movably connected inside the outer shell and matching the curvature of the screen cylinder, an industrial camera being disposed inside the outer shell, the industrial camera irradiating the surface of the screen cylinder, a controller being disposed on the upper surface of the box, the controller having a graphics processor disposed inside the controller, the industrial camera and the electric push rod being electrically connected to the controller, a replacement mechanism being disposed inside the box, the replacement mechanism having a screen plate engaged inside the replacement mechanism.

[0007] The above solution, through the installation of an industrial camera, controller, and replacement mechanism, allows the industrial camera to monitor the surface blockage of the screen cylinder in real time. Combined with the controller's image processing function, it intelligently identifies the degree of blockage in the screen holes. When a blockage signal is detected, the controller automatically activates the electric push rod to press down, driving the arc-shaped cleaning plate to adhere to the outer wall of the screen cylinder. As the screen cylinder rotates, the arc-shaped cleaning plate removes blockages through scraping action, achieving automated cleaning, significantly reducing downtime for cleaning, and improving production continuity. The industrial camera lens uses a diamond-coated material, which is wear-resistant and stain-resistant, adapting to the high-dust environment of concrete aggregate screening, ensuring long-term stable monitoring. By engaging the left end of the screen plate inside the U-shaped limiting block, pushing the screen plate to the left moves it to the left. When the screen plate reaches its maximum left position, the right end of the screen plate is inserted into the limiting groove, and under the action of the first spring's rebound force, the screen plate is fixed. Conversely, this facilitates the removal of the screen plate, thus enabling the quick installation or removal of screen plates with different aperture sizes.

[0008] Furthermore, the replacement mechanism includes a first housing, which is disposed inside the box. A telescopic rod is fixedly connected inside the first housing, and a first spring is sleeved on the surface of the telescopic rod. The left end of the first spring is fixedly connected inside the first housing, and a U-shaped limiting block is fixedly connected to the right end of the first spring and the telescopic rod. A slider is fixedly connected to the side of the U-shaped limiting block. A sliding groove is opened inside the first housing, and the slider is slidably connected inside the sliding groove. There are two sets of sliders, which are symmetrically arranged on both sides of the U-shaped limiting block. A second housing is disposed inside the box, and a limiting groove is opened on the left side of the second housing. The sieve plate is installed between the U-shaped limiting block and the limiting groove.

[0009] The above solution uses a slider and a chute to guide the U-shaped limit block to slide along a fixed path, preventing deviation or jamming and improving the installation accuracy of the screen plate.

[0010] Furthermore, an outlet is provided on the front side of the box, and the front end of the sieve plate and the replacement mechanism are movably disposed inside the outlet. A sliding rod is fixedly connected to the upper end of both the first shell and the second shell. The upper end of the sliding rod movably passes through the upper surface of the box. A baffle is fixedly connected to the upper end of the sliding rod. A second spring is sleeved on the upper surface of the sliding rod. The upper end of the second spring is fixedly connected to the lower surface of the baffle, and the lower end of the second spring is fixedly connected to the upper surface of the box.

[0011] With the above scheme, the protrusions on the surface of the rotating shaft periodically squeeze the baffle as it rotates, compressing the second spring; when the protrusions disengage from the baffle, the second spring resets and drives the sliding rod and screen plate to move upward quickly, forming high-frequency micro-amplitude vibration, which accelerates the passage of fine aggregate through the screen plate.

[0012] Furthermore, a motor frame is fixedly connected to the right side of the housing, and a forward and reverse motor is fixedly connected inside the motor frame. A rotating shaft is fixedly connected to the output end of the forward and reverse motors, and a sprocket is fixedly connected to the surface of the rotating shaft. A rotating rod is rotatably connected inside the screen cylinder, and a spiral conveying blade is provided on the surface of the rotating rod. There are two sets of sprockets, with the other set located on the right end surface of the rotating rod. Chains are provided on the surfaces of the two sets of sprockets, and the chains drive the rotating rod and the rotating shaft to rotate synchronously.

[0013] With the above scheme, the rotating shaft drives the rotating rod and the spiral conveyor blade to rotate synchronously through the sprocket and chain.

[0014] Furthermore, the rotating shaft is rotatably connected to the inside of the upper end of the housing, and the surface of the rotating shaft is provided with protrusions, which are located on the upper end of the baffle.

[0015] The above design facilitates the replacement mechanism and the vertical movement of the sieve plate.

[0016] Furthermore, the outer shell is fixedly connected to the left and right sides with fixing members, and the lower ends of the two sets of fixing members are fixedly connected to fixing discs. The left and right ends of the screen cylinder are rotatably connected to the opposite surfaces of the two sets of fixing discs.

[0017] The above solution ensures structural stability through the rotating connection between the fixed plate and the screen cylinder.

[0018] Furthermore, the surface of the fixed plate at the right end is connected to a feed inlet, the surface of the fixed plate at the left end is connected to a discharge outlet, and a sealing door is provided on the right side of the box.

[0019] With the above solution, coarse aggregate is discharged after being conveyed by the screw conveyor blades throughout the process, avoiding residue; the sealed door facilitates cleaning of accumulated material inside the box.

[0020] Furthermore, a first gear is provided on the surface of the rotating shaft, and a second gear is provided on the surface of the screen cylinder. The first gear and the second gear mesh with each other, and the lens surface material of the industrial camera is diamond coated.

[0021] Through the above scheme, the first gear and the second gear mesh to accurately transmit power, driving the screen cylinder and the spiral conveyor blade to move in opposite directions, thereby enhancing the tumbling and screening effect of aggregates.

[0022] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0023] This aggregate screening device for recycled ultra-high performance concrete incorporates an industrial camera, controller, and replacement mechanism. The industrial camera monitors the clogging status of the screen cylinder surface in real time, and combined with the controller's image processing function, intelligently identifies the degree of clogging in the screen holes. When a clogging signal is detected, the controller automatically activates an electric push rod to press down, driving an arc-shaped cleaning plate to adhere to the outer wall of the screen cylinder. As the screen cylinder rotates, the arc-shaped cleaning plate removes the clogging material through scraping action, achieving automated cleaning, significantly reducing downtime for cleaning, and improving production continuity. The industrial camera lens is made of diamond-coated material, which is wear-resistant and stain-resistant, adapting to the high-dust environment of concrete aggregate screening and ensuring long-term stable monitoring. By engaging the left end of the screen plate inside the U-shaped limiting block, pushing the screen plate to the left moves it to the left. When the screen plate reaches its maximum leftward position, the right end of the screen plate is inserted into the limiting groove, and under the rebound force of the first spring, the screen plate is fixed. Conversely, this facilitates the removal of the screen plate, enabling the rapid installation or disassembly of screen plates with different aperture sizes. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure in frontal three-dimensional cross-section of this application;

[0025] Figure 2 This is a three-dimensional structural diagram of the present application.

[0026] Figure 3 This is a schematic diagram of the structure viewed from the left side of this application;

[0027] Figure 4 This is a structural schematic diagram showing the cross-section of the replaced mechanism in this application;

[0028] Figure 5 For this application Figure 1 A schematic diagram of the structure at point A in the middle.

[0029] In the picture:

[0030] 1. Outer shell; 2. Box body; 3. Screen cylinder; 4. Electric push rod; 5. Arc-shaped cleaning plate; 6. Controller; 7. Replacement mechanism; 701. First shell; 702. Telescopic rod; 703. First spring; 704. U-shaped limit block; 705. Slider; 706. Slide groove; 707. Second shell; 708. Limiting groove; 8. Screen plate; 9. Fixing component; 10. Fixing plate; 11. Motor frame; 12. Forward and reverse motor; 13. Rotating shaft; 14. Sprocket; 15. Chain; 16. Rotating rod; 17. Spiral conveyor blade; 18. Screen hole; 19. Feed inlet; 20. Discharge outlet; 21. First gear; 22. Second gear; 23. Protrusion; 24. Sliding rod; 25. Second spring; 26. Baffle; 27. Outlet; 28. Sealing door; 29. ​​Industrial camera. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] Please see Figure 1 , Figure 2 and Figure 5This embodiment of an aggregate screening device for recycled ultra-high performance concrete includes an outer shell 1 and a box 2. The outer shell 1 is located on the upper end of the box 2 and is connected to the box 2. A screen cylinder 3 is installed inside the outer shell 1, and the surface of the screen cylinder 3 is provided with screen holes 18. Both ends of the screen cylinder 3 extend to the outside of the outer shell 1 and are rotatably connected to the outer shell 1. An electric push rod 4 is installed at the upper end of the outer shell 1, and an arc-shaped cleaning plate 5 is installed at the lower end of the electric push rod 4. The arc-shaped cleaning plate 5 is movably connected inside the outer shell 1 and matches the curvature of the screen cylinder 3. An industrial camera 29 is installed inside the housing 1, illuminating the surface of the screen cylinder 3. A controller 6 is installed on the upper surface of the housing 2, and a graphics processor is installed inside the controller 6. The industrial camera 29 and the electric push rod 4 are both electrically connected to the controller 6. A replacement mechanism 7 is installed inside the housing 2, and a screen plate 8 is snapped into place inside the replacement mechanism 7. By setting up the industrial camera 29, the controller 6, and the replacement mechanism 7, the industrial camera 29 monitors the clogging status of the surface of the screen cylinder 3 in real time. Combined with the graphics processing function of the controller 6, the degree of clogging of the screen holes 18 is intelligently identified. When a clogging signal is detected, the controller 6 automatically activates the electric push rod 4 to press down, driving the arc-shaped cleaning plate 5 to adhere to the outer wall of the screen cylinder 3. When the screen cylinder 3 rotates, the arc-shaped cleaning plate 5 removes blockages through scraping action, achieving automated cleaning, significantly reducing the frequency of downtime for cleaning, and improving production continuity. The industrial camera 29 lens is made of diamond-coated material, which is wear-resistant and stain-resistant, adapting to the high dust environment of concrete aggregate screening, and ensuring long-term stable monitoring. By engaging the left end of the screen plate 8 inside the U-shaped limiting block 704, the screen plate 8 is pushed to the left, thereby moving the screen plate 8 to the left. When the screen plate 8 moves to the maximum position to the left, the right end of the screen plate 8 is inserted into the limiting groove 708. Under the rebound force of the first spring 703, the screen plate 8 is fixed. Conversely, it is easy to remove the screen plate 8, thus facilitating the quick installation or disassembly of screen plates 8 with different aperture sizes.

[0033] Please see Figure 1 , Figure 3 and Figure 4The replacement mechanism 7 includes a first housing 701, which is located inside the housing 2. A telescopic rod 702 is fixedly connected inside the first housing 701. A first spring 703 is sleeved on the surface of the telescopic rod 702. The left end of the first spring 703 is fixedly connected inside the first housing 701. A U-shaped limiting block 704 is fixedly connected to the right end of the first spring 703 and the telescopic rod 702. A slider 705 is fixedly connected to the side of the U-shaped limiting block 704. A sliding groove 706 is formed inside the first housing 701. The slider 705 is slidably connected inside the sliding groove 706. There are two sets of sliders 705. Symmetrically arranged on both sides of the U-shaped limiting block 704, a second housing 707 is provided inside the housing 2. A limiting groove 708 is opened on the left side of the second housing 707. The sieve plate 8 is installed between the U-shaped limiting block 704 and the limiting groove 708. An outlet 27 is opened on the front side of the housing 2. The front ends of the sieve plate 8 and the replacement mechanism 7 are movably disposed inside the outlet 27. A sliding rod 24 is fixedly connected to the upper end of both the first housing 701 and the second housing 707. The upper end of the sliding rod 24 movably passes through the upper surface of the housing 2. A baffle 26 is fixedly connected to the upper end of the sliding rod 24. A second spring 25 is sleeved on the upper surface of the sliding rod 24. The upper end of the second spring 25 is fixedly connected to the lower surface of the baffle 26, and the lower end of the second spring 25 is fixedly connected to the upper surface of the housing 2. A motor frame 11 is fixedly connected to the right side of the housing 2. A forward and reverse motor 12 is fixedly connected inside the motor frame 11. A rotating shaft 13 is fixedly connected to the output end of the forward and reverse motor 12. A sprocket 14 is fixedly connected to the surface of the rotating shaft 13. A rotating rod 16 is rotatably connected inside the screen cylinder 3. A spiral conveyor blade 17 is provided on the surface of the rotating rod 16. Two sets of sprockets 14 are provided, with the other set located on the right end surface of the rotating rod 16. A chain 15 is provided on the surfaces of the two sets of sprockets 14. The chain 15 carries... The rotating rod 16 and the rotating shaft 13 rotate synchronously. The slider 705 cooperates with the slide groove 706 to guide the U-shaped limit block 704 to slide along a fixed path to prevent deviation or jamming and improve the installation accuracy of the screen plate 8. The protrusion 23 on the surface of the rotating shaft 13 periodically squeezes the baffle 26 as it rotates, compressing the second spring 25. When the protrusion 23 disengages from the baffle 26, the second spring 25 resets and drives the sliding rod 24 and the screen plate 8 to move upward quickly, forming a high-frequency micro-amplitude vibration, which accelerates the passage of fine aggregate through the screen plate 8. The rotating shaft 13 drives the rotating rod 16 and the spiral conveyor blade 17 to rotate synchronously through the sprocket 14 and the chain 15.

[0034] Please see Figure 1 , Figure 3 and Figure 4The rotating shaft 13 is rotatably connected to the upper interior of the housing 2. A protrusion 23 is provided on the surface of the rotating shaft 13, and the protrusion 23 is located on the upper end of the baffle 26. Fixing members 9 are fixedly connected to both sides of the outer housing 1. Fixing plates 10 are fixedly connected to the lower ends of both sets of fixing members 9. The left and right ends of the screen cylinder 3 are rotatably connected to the opposite faces of the two sets of fixing plates 10. A feed inlet 19 is connected to the surface of the right-end fixing plate 10, and a discharge outlet 20 is connected to the surface of the left-end fixing plate 10. A sealing door 28 is provided on the right side of the housing 2. A first gear 21 is provided on the surface of the rotating shaft 13. The screen cylinder 3... The surface is equipped with a second gear 22, which meshes with the first gear 21 and the second gear 22. The lens surface of the industrial camera 29 is made of diamond coating. The protrusion 23 facilitates the replacement of the mechanism 7 and the screen plate 8. The rotating connection between the fixed plate 10 and the screen cylinder 3 ensures structural stability. Coarse aggregate is discharged after being conveyed by the spiral conveyor blade 17 throughout the process to avoid residue. The sealing door 28 facilitates the cleaning of the material accumulated inside the box 2. The meshing of the first gear 21 and the second gear 22 accurately transmits power, driving the screen cylinder 3 and the spiral conveyor blade 17 to move in opposite directions, enhancing the tumbling and screening effect of the aggregate.

[0035] In this embodiment, by setting up an industrial camera 29, a controller 6, and a replacement mechanism 7, the industrial camera 29 monitors the surface blockage of the screen cylinder 3 in real time. Combined with the image processing function of the controller 6, it intelligently identifies the degree of blockage in the screen holes 18. When a blockage signal is detected, the controller 6 automatically starts the electric push rod 4 to press down, driving the arc-shaped cleaning plate 5 to fit against the outer wall of the screen cylinder 3. When the screen cylinder 3 rotates, the arc-shaped cleaning plate 5 removes blockages through scraping action, achieving automated cleaning, significantly reducing the frequency of downtime for cleaning, and improving production continuity. The industrial camera 29 lens is made of diamond-coated material, which is wear-resistant and stain-resistant, adapting to the high dust environment of concrete aggregate screening, and ensuring long-term stable monitoring. By engaging the left end of the screen plate 8 inside the U-shaped limiting block 704, the screen plate 8 is pushed to the left, thereby moving the screen plate 8 to the left. When the screen plate 8 moves to the maximum position to the left, the right end of the screen plate 8 is inserted into the limiting groove 708. Under the rebound force of the first spring 703, the screen plate 8 is fixed. Conversely, it is easy to remove the screen plate 8, thus facilitating the quick installation or disassembly of screen plates 8 with different aperture sizes.

[0036] The working principle of the above embodiment is as follows: Recycled concrete aggregate enters the rotating screen cylinder 3 through the feed inlet 19 and is pushed to the left by the screw conveyor blade 17. During this process, small aggregate particles fall into the lower box 2 through the screen holes 18 for secondary screening; coarse aggregate particles are intercepted by the screen cylinder 3 and finally discharged through the discharge port 20. The rotation of the screen cylinder 3 is driven by the meshing of the first gear 21 and the second gear 22, forming a reverse motion with the screw conveyor of the rotating rod 16, enhancing the aggregate tumbling effect and improving the primary screening efficiency. The industrial camera 29 captures images of the surface of the screen cylinder 3 in real time, and the graphics processor of the controller 6 analyzes the degree of blockage of the screen holes 18. When the detected blockage area exceeds the preset threshold, the controller 6 triggers the electric push rod 4 to press down. The electric push rod 4 drives the arc-shaped cleaning plate 5 to press against the outer wall of the screen cylinder 3. When the screen cylinder 3 rotates, the arc-shaped cleaning plate 5 removes the blockage. After cleaning, the electric push rod 4 resets. The diamond-coated lens ensures that the industrial camera 29 can work stably for a long time in a dusty environment. The rotating shaft 13 drives the rotating rod 16 and the spiral conveyor blade 17 to rotate synchronously through the sprocket 14 and chain 15. Simultaneously, the protrusions 23 on the surface of the rotating shaft 13 periodically press the baffle 26 as it rotates, compressing the second spring 25. When the protrusions 23 disengage from the baffle 26, the second spring 25 resets, causing the sliding rod 24 and the screen plate 8 to move rapidly upward, forming a high-frequency micro-amplitude vibration, accelerating the passage of fine aggregate through the screen plate 8. By engaging the left end of the screen plate 8 inside the U-shaped limiting block 704, the screen plate 8 is pushed to the left, thereby moving the screen plate 8 to the left. When the screen plate 8 moves to the maximum position to the left, the right end of the screen plate 8 is inserted into the limiting groove 708. Under the rebound force of the first spring 703, the screen plate 8 is fixed. Conversely, it is easy to remove the screen plate 8, thus facilitating the quick installation or disassembly of screen plates 8 with different apertures. The sealing door 28 on the right side of the housing 2 facilitates the cleaning of internal accumulated material. The rotational connection between the fixed plate 10 and the screen cylinder 3 ensures structural stability.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0038] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An aggregate screening device for recycling ultra-high performance concrete, comprising an outer housing (1) and a box (2), characterized in that: The outer shell (1) is located on the upper end of the box (2), and the outer shell (1) and the box (2) are connected. A sieve cylinder (3) is provided inside the outer shell (1), and sieve holes (18) are provided on the surface of the sieve cylinder (3). Both ends of the sieve cylinder (3) extend to the outside of the outer shell (1) and are rotatably connected to the outer shell (1). An electric push rod (4) is provided on the upper end of the outer shell (1), and an arc-shaped cleaning plate (5) is provided on the lower end of the electric push rod (4). The arc-shaped cleaning plate (5) is movably connected to the outer shell. The body (1) is inside and matches the curvature of the screen cylinder (3). An industrial camera (29) is installed inside the outer shell (1). The industrial camera (29) illuminates the surface of the screen cylinder (3). A controller (6) is installed on the upper surface of the box (2). A graphics processor is installed inside the controller (6). The industrial camera (29) and the electric push rod (4) are both electrically connected to the controller (6). A replacement mechanism (7) is installed inside the box (2). A screen plate (8) is snapped into the replacement mechanism (7).

2. The aggregate screening device for recycled ultra-high performance concrete according to claim 1, wherein: The replacement mechanism (7) includes a first housing (701), which is disposed inside the box (2). A telescopic rod (702) is fixedly connected inside the first housing (701). A first spring (703) is sleeved on the surface of the telescopic rod (702). The left end of the first spring (703) is fixedly connected inside the first housing (701). A U-shaped limiting block (704) is fixedly connected to the right end of the first spring (703) and the telescopic rod (702). A slider (705) is fixedly connected to the side. A groove (706) is provided inside the first housing (701). The slider (705) is slidably connected inside the groove (706). There are two sets of sliders (705), which are symmetrically arranged on both sides of the U-shaped limiting block (704). A second housing (707) is provided inside the box (2). A limiting groove (708) is provided on the left side of the second housing (707). The sieve plate (8) is installed between the U-shaped limiting block (704) and the limiting groove (708).

3. The aggregate screening device for recycled ultra-high performance concrete according to claim 2, wherein: The box (2) has an outlet (27) on the front side. The front ends of the sieve plate (8) and the replacement mechanism (7) are movably arranged inside the outlet (27). The upper ends of the first shell (701) and the second shell (707) are fixedly connected to a sliding rod (24). The upper end of the sliding rod (24) is movably inserted through the upper surface of the box (2). The upper end of the sliding rod (24) is fixedly connected to a baffle (26). The upper surface of the sliding rod (24) is sleeved with a second spring (25). The upper end of the second spring (25) is fixedly connected to the lower surface of the baffle (26), and the lower end of the second spring (25) is fixedly connected to the upper surface of the box (2).

4. The aggregate screening device for recycled ultra-high performance concrete according to claim 3, wherein: A motor frame (11) is fixedly connected to the right side of the box (2). A forward and reverse motor (12) is fixedly connected inside the motor frame (11). A rotating shaft (13) is fixedly connected to the output end of the forward and reverse motor (12). A sprocket (14) is fixedly connected to the surface of the rotating shaft (13). A rotating rod (16) is rotatably connected inside the screen cylinder (3). A spiral conveying blade (17) is provided on the surface of the rotating rod (16). There are two sets of sprockets (14). The other set is provided on the right end surface of the rotating rod (16). A chain (15) is provided on the surface of the two sets of sprockets (14). The chain (15) drives the rotating rod (16) and the rotating shaft (13) to rotate synchronously.

5. The aggregate screening device for recycled ultra-high performance concrete according to claim 4, wherein: The rotating shaft (13) is rotatably connected to the upper end of the housing (2). The surface of the rotating shaft (13) is provided with a protrusion (23), which is located on the upper end of the baffle (26).

6. The aggregate screening device for recycled ultra-high performance concrete of claim 1, wherein: The outer shell (1) is fixedly connected to the left and right sides with fixing parts (9), and the lower ends of the two sets of fixing parts (9) are fixedly connected to fixing discs (10). The left and right ends of the screen cylinder (3) are rotatably connected to the opposite sides of the two sets of fixing discs (10).

7. The aggregate screening device for recycled ultra-high performance concrete according to claim 6, wherein: The surface of the fixed plate (10) at the right end is connected to the feed inlet (19), the surface of the fixed plate (10) at the left end is connected to the discharge outlet (20), and the right side of the box body (2) is provided with a sealing door (28).

8. The aggregate screening device for recycled ultra-high performance concrete of claim 4, wherein: The rotating shaft (13) is provided with a first gear (21), and the screen cylinder (3) is provided with a second gear (22). The first gear (21) and the second gear (22) mesh with each other. The lens surface of the industrial camera (29) is made of diamond coating.

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