A method for preparing super-durable concrete using construction waste recycled aggregate

Abstract

The application discloses the technical field of construction waste and relates to a method for preparing super-durability concrete by using construction waste recycled aggregate, which comprises a roller screener, a plurality of cylindrical screens are arranged in the roller screener through a driving mechanism, the mesh numbers of the plurality of cylindrical screens are all different, the driving mechanism is used for continuously driving the plurality of cylindrical screens to rotate, a plurality of discharge cylinders corresponding to the cylindrical screens are arranged at the bottom end of the roller screener, a detection mechanism is arranged at the bottom opening of the discharge cylinder, the detection mechanism is used for detecting the material amount discharged from the bottom end of the discharge cylinder, and a partition plate is arranged between two adjacent cylindrical screens through an opening and closing mechanism, the opening and closing mechanism is used for driving the partition plate to be opened and closed from right to left in sequence when the detection mechanism detects that no material passes through the plurality of discharge cylinders, and the method solves the problem that the existing construction waste recycled aggregate super-durability concrete preparation equipment cannot self-detect the degree of screening of the crushed materials.

Description

Technical Field

[0001] This invention relates to the field of construction waste technology, specifically to a method for preparing ultra-durable concrete using recycled aggregates from construction waste. Background Technology

[0002] Recycled concrete is a new type of concrete made by crushing, physically strengthening, and screening construction waste, then mixing it with gradation according to a certain ratio, and using it to partially or completely replace natural aggregates (mainly coarse aggregates). Concrete beams using recycled aggregates are called reinforced recycled concrete beams. Sand made from construction waste is called recycled fine aggregate in the industry. The crushed construction waste is screened by a drum screener.

[0003] In existing technologies, the interior of a drum screen is open, making it difficult to control the screening degree of construction waste fragments. This results in the fragments discharged from the tail end of the equipment not being fully screened. The repeated screening of fragments by the drum screen greatly reduces the efficiency of production and processing, while also requiring a large amount of manpower, which brings inconvenience to the treatment of construction waste. Furthermore, existing equipment for preparing ultra-durable concrete using recycled aggregates from construction waste cannot automatically detect the screening degree of the fragments. Summary of the Invention

[0004] The purpose of this invention is to provide a method for preparing ultra-durable concrete using recycled aggregates from construction waste, which has a self-detection function for the degree of crushing of aggregates, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A method for preparing ultra-durable concrete using recycled aggregates from construction waste, the specific steps of which are as follows:

[0007] Step 1: Collect construction waste and crush it using crushing equipment. The crushed debris is then pre-treated using washing equipment.

[0008] Step 2: The debris is thoroughly screened by a screening device, and the screened material is then sorted and collected.

[0009] Step 3: Mix the categorized materials and admixtures evenly according to the mixing ratio, and then put the evenly mixed materials into a concrete mixer for continuous mixing.

[0010] The screening device includes a drum screen. A plurality of cylindrical filter screens are arranged on the inner side of the drum screen via a drive mechanism. The mesh count of each of the cylindrical filter screens is different. The drive mechanism drives the cylindrical filter screens to rotate continuously. A plurality of discharge cylinders, each corresponding to a cylindrical filter screen, are arranged at the bottom end of the drum screen. A detection mechanism is provided at the bottom opening of each discharge cylinder to detect the amount of material discharged from the bottom of the discharge cylinder. A partition is provided between each adjacent cylindrical filter screen via an opening and closing mechanism. When the detection mechanism detects that no more material is passing through any of the discharge cylinders, the opening and closing mechanism drives the partitions to open and close sequentially from right to left.

[0011] As a further embodiment of the present invention, the opening and closing mechanism includes several sets of limiting frames fixedly installed inside the drum screen, and limiting rings fixedly installed on the outer side of each cylindrical filter screen. Each limiting ring is located inside two adjacent limiting frames and is slidably connected to them. Several arc-shaped supports are fixedly installed inside the drum screen. The arc-shaped supports are located between two adjacent cylindrical filter screens and are in contact with them. Several limiting boxes corresponding to the arc-shaped supports are fixedly installed at the top of the drum screen. The partition is located inside the limiting box and its bottom end is tightly in contact with the arc-shaped support. A lifting mechanism is provided at the top of the partition. The lifting mechanism is used to drive the partition to move up and down sequentially when there is no more material passing through the discharge cylinder.

[0012] As a further embodiment of the present invention, the lifting mechanism includes a mounting frame installed at the front end of the drum screen. A plurality of mounting plates corresponding one-to-one with the partitions are fixedly installed on the rear top of the mounting frame. A first mounting column is fixedly installed on the top left end of each mounting plate. A rotating rod is rotatably connected to the top of each first mounting column. A pressing plate is fixedly installed on the right side of each rotating rod. A pressing rod is fixedly installed on the front top of each partition. The right end of each pressing plate corresponds to the front end of the pressing rod. A locking mechanism is provided at the top right end of the mounting plate to limit the pressing rod. An alternating mechanism is provided at the front end of each rotating rod to control the plurality of rotating rods to rotate sequentially from right to left. The top ends of each partition are connected to the top end of the drum screen via compression springs.

[0013] As a further embodiment of the present invention, the locking mechanism includes a second mounting post fixedly mounted on the top right end of the mounting plate. A wedge-shaped rod is slidably connected to the middle of the top end of the second mounting post via a tension spring. The wedge-shaped end of the wedge-shaped rod blocks the top end of the pressing rod. A serpentine rod is provided at the front end of the second mounting post. An insert rod is fixedly mounted at the bottom end of the serpentine rod. The bottom end of the insert rod passes through the mounting plate and is slidably connected to it. A push-pull rod is fixedly mounted on the front right end of the wedge-shaped rod. The front end of the push-pull rod corresponds to the right inclined end of the serpentine rod.

[0014] As a further embodiment of the present invention, the alternating mechanism includes a drive roller rotatably connected to the top front end of a mounting frame, a first motor fixedly mounted at the top end of the mounting frame, the output end of the first motor connected to the drive roller, a plurality of third mounting posts fixedly mounted at the top end of the mounting frame, each third mounting post having a rotating shaft rotatably connected to its top end, and a transmission wheel fixedly mounted on the outer side of each rotating shaft. The lengths of the plurality of rotating rods are all different. The rear end of the rotating shaft located at the front right end is connected to the front end of the first rotating rod from right to left via a transmission belt, and the rear end of the rotating shaft located at the rear right end is connected to the front end of the second rotating rod from right to left via a transmission belt. The shaft is connected at both ends. The rear end of the shaft located at the front left end is connected to the front end of the first rotating rod from left to right via a transmission belt. The rear end of the shaft located at the middle left end is connected to the front end of the second rotating rod from left to right via a transmission belt. The rear end of the shaft located at the rear left end is connected to the front end of the third rotating rod from left to right via a transmission belt. Four sets of arc-shaped transmission blocks are fixedly installed on the outer side of the drive roller. The two arc-shaped transmission blocks at the left and right ends correspond to the transmission wheels at the front left end, rear left end, and front right end, respectively. The two arc-shaped transmission blocks at the bottom end correspond to the transmission wheels at the middle left end and rear right end, respectively.

[0015] As a further embodiment of the present invention, the detection mechanism includes mounting blocks fixedly installed on the inner walls of both the front and rear ends of the discharge cylinder. Two inclined plates are provided on the inner side of each discharge cylinder. A lifting rod is fixedly installed at the bottom end of each inclined plate. The bottom end of each lifting rod passes through the mounting block and is slidably connected to it. The bottom end of each inclined plate is connected to the mounting block by a compression spring. Adjacent inclined plates are fixedly connected to each other. A push plate is fixedly installed on the rear side of the bottom end of each lifting rod. A synchronization plate is slidably connected to the rear ends of several discharge cylinders by a tension spring. The bottom end of each push plate is in contact with the synchronization plate. A sensor is fixedly installed at the rear end of the right discharge cylinder. The top right end of the synchronization plate is in contact with the sensor.

[0016] As a further embodiment of the present invention, the driving mechanism includes toothed rings fixedly installed on the outer side of the left end of the cylindrical filter screen, a second motor fixedly installed on the rear right end of the drum screen, a synchronizing rod fixedly installed on the output end of the second motor, and a plurality of gears corresponding one-to-one with the toothed rings fixedly installed on the outer side of the synchronizing rod, and the gears meshing with the adjacent toothed rings.

[0017] As a further embodiment of the present invention, a disc is rotatably connected to the bottom left side of the partition, the bottom end of the disc is in contact with the inner wall of the cylindrical filter screen, and two levers are fixedly installed on the left end of the disc.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. By setting up a detection mechanism, the present invention enables the opening and closing mechanism to transfer materials only when no more material is screened down in each layer. This ensures that the material in each layer can be fully screened by the cylindrical filter screen, greatly improving the quality of the screened material, saving the steps of repeated screening, saving labor, and improving the efficiency of production and processing.

[0020] 2. By setting up an opening and closing mechanism, this invention allows the material in the left layer to be conveyed to the right only after the material in the first layer has been completely discharged. This enables batch conveying of materials, avoiding the mixing of materials that have not been screened in this layer with those that have been screened in this layer, further improving screening efficiency. This brings convenience to the production of recycled concrete from construction waste and solves the problem that existing equipment for preparing ultra-durable concrete using recycled aggregate from construction waste cannot self-detect the degree of crushed material screening. Attached Figure Description

[0021] Figure 1 This is a flowchart of the method of the present invention;

[0022] Figure 2 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the rear view structure of the present invention;

[0024] Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A in the middle;

[0025] Figure 5 This is a schematic diagram of the structure from a side-down perspective of the present invention;

[0026] Figure 6 This is a partial structural diagram from the front view of the present invention;

[0027] Figure 7 For the present invention Figure 6 Enlarged structural diagram at point B;

[0028] Figure 8 For the present invention Figure 6 Enlarged structural diagram at point C;

[0029] Figure 9 This is a schematic diagram of the connection structure between the drive roller and the arc-shaped transmission block in this invention;

[0030] Figure 10 This is a schematic diagram of the connection structure between the partition plate and the arc-shaped support in this invention;

[0031] Figure 11 This is a schematic diagram of the internal structure of the present invention from a side view.

[0032] Figure 12 This is a schematic diagram of the internal structure of the present invention from a frontal perspective.

[0033] Figure 13 For the present invention Figure 12 Enlarged structural diagram at point D;

[0034] Figure 14 This is a schematic diagram of the stepped cross-section of the internal structure of the present invention from a side view.

[0035] Figure 15 For the present invention Figure 14 Enlarged structural diagram at point E in the middle.

[0036] The attached diagram lists the components represented by each number as follows:

[0037] 1. Rotary drum screen; 2. Cylindrical filter screen; 3. Discharge cylinder; 4. Partition plate; 5. Limiting frame; 6. Limiting ring; 7. Arc-shaped support; 8. Limiting box; 9. Mounting frame; 10. Mounting plate; 11. First mounting column; 12. Rotating rod; 13. Pressing plate; 14. Pressing rod; 15. Second mounting column; 16. Wedge rod; 17. Serpentine rod; 18. Insert rod; 19. Push-pull rod; 20. Drive drum; 21. First motor; 22. Third mounting column; 23. Rotating shaft; 24. Transmission wheel; 25. Transmission belt; 26. Arc-shaped transmission block; 27. Mounting block; 28. Inclined plate; 29. ​​Lifting rod; 30. Push plate; 31. Synchronizing plate; 32. Sensor; 33. Gear ring; 34. Second motor; 35. Synchronizing rod; 36. Gear; 37. Disc; 38. Pulley. Detailed Implementation

[0038] Please see Figures 1-15 The present invention provides a technical solution:

[0039] A method for preparing ultra-durable concrete using recycled aggregates from construction waste, the specific steps of which are as follows:

[0040] Step 1: Collect construction waste and crush it using crushing equipment. The crushed debris is then pre-treated using washing equipment.

[0041] Step 2: The debris is thoroughly screened by a screening device, and the screened material is then sorted and collected.

[0042] Step 3: Mix the categorized materials and admixtures evenly according to the mixing ratio, and then put the evenly mixed materials into a concrete mixer for continuous mixing.

[0043] The screening device includes a drum screen 1. Several cylindrical filter screens 2 are installed on the inner side of the drum screen 1 via a drive mechanism. The mesh count of the cylindrical filter screens 2 is different. The drive mechanism is used to drive the cylindrical filter screens 2 to rotate continuously. Several discharge cylinders 3 corresponding to the cylindrical filter screens 2 are installed at the bottom of the drum screen 1. A detection mechanism is installed at the bottom opening of the discharge cylinder 3. The detection mechanism is used to detect the amount of material discharged from the bottom of the discharge cylinder 3. A partition 4 is installed between two adjacent cylindrical filter screens 2 via an opening and closing mechanism. The opening and closing mechanism is used to drive the partition 4 to open and close sequentially from right to left when the detection mechanism detects that there is no more material passing through the discharge cylinders 3.

[0044] The opening and closing mechanism includes several sets of limiting frames 5 fixedly installed inside the drum screen 1, and limiting rings 6 fixedly installed on the outer side of the cylindrical filter screen 2. The limiting rings 6 are located inside two adjacent limiting frames 5 and are slidably connected to them. Several arc-shaped supports 7 are fixedly installed inside the drum screen 1. The arc-shaped supports 7 are located between two adjacent cylindrical filter screens 2 and are in contact with them. Several limiting boxes 8 corresponding to the arc-shaped supports 7 are fixedly installed at the top of the drum screen 1. The partition plate 4 is located inside the limiting box 8 and its bottom end is tightly in contact with the arc-shaped support 7. A lifting mechanism is provided at the top of the partition plate 4. The lifting mechanism is used to drive the partition plate 4 to move up and down sequentially when there is no more material passing through the discharge cylinder 3.

[0045] During operation, construction waste fragments are slowly fed into the top left end of the drum screen 1. The operator only needs to open the left end partition 4 when screening begins. When a certain amount of fragments are stored in the left end cylindrical filter screen 2, the left end partition 4 is reset, and then the drive mechanism is started. The drive mechanism drives several cylindrical filter screens 2 to rotate synchronously in the drum screen 1. At this time, the first partition 4 from left to right blocks the subsequently fed construction waste fragments, and the second partition 4 from left to right blocks the construction waste fragments in the left end cylindrical filter screen 2, so that the fragments continue to tumble in the left end cylindrical filter screen 2. As the fragments tumble, some fragments that match the aperture slowly fall into the left end discharge cylinder 3 and are discharged downwards until the detection mechanism detects that no more fragments are passing through the left end discharge cylinder 3. At this time, the material in the left end cylindrical filter screen 2 is fully screened and separated. At the same time, the detection mechanism drives the lifting mechanism to start.

[0046] The lifting mechanism starts and drives the first partition 4 from right to left to move upward. After the first partition 4 is open for a certain period of time, it moves downward to reset. When the partition 4 has reset, the lifting mechanism drives the second partition 4 from right to left to move upward, and so on, repeating the operation until the fourth partition 4 from right to left moves upward. At this time, the material in the cylindrical filter screen 2 slides into the cylindrical filter screen 2 on the right side and is blocked again by the third partition 4 from right to left, at which point the material is screened again. When the fourth partition 4 from right to left resets downward, the first partition 4 from left to right moves upward. At this time, the crushed material accumulated at the left end of the drum screen 1 falls into the first cylindrical filter screen 2 at the left end. This repeated operation achieves layer-by-layer filtration of construction waste crushed material. By setting a detection mechanism, when The opening and closing mechanism can only be activated to transfer materials when no more material is screened down from each layer. This ensures that the material in each layer can be fully screened by the cylindrical filter screen 2, greatly improving the quality of the screened material, saving the steps of repeated screening, saving labor, and improving production efficiency. By setting up a lifting mechanism, the material in the left layer can only be conveyed to the right after the material in the first layer is completely discharged, realizing batch conveying of materials and avoiding the mixing of materials that have not been screened in this layer with those that have been screened in this layer. This further improves screening efficiency and brings convenience to the production of recycled concrete from construction waste. It also solves the problem that existing equipment for preparing ultra-durable concrete using recycled aggregate from construction waste cannot self-detect the degree of crushed material screening.

[0047] As a further embodiment of the present invention, the lifting mechanism includes a mounting frame 9 installed at the front end of the drum screen 1. Several mounting plates 10 corresponding one-to-one with partitions 4 are fixedly installed on the rear side of the top end of the mounting frame 9. A first mounting column 11 is fixedly installed on the top left end of each mounting plate 10. A rotating rod 12 is rotatably connected to the top end of the first mounting column 11. A pressing plate 13 is fixedly installed on the right side of each rotating rod 12. A pressing rod 14 is fixedly installed on the front side of the top end of each partition 4. The right end of each pressing plate 13 corresponds to the front end of each pressing rod 14. A locking mechanism is provided at the top right end of the mounting plate 10. The locking mechanism is used to limit the pressing rod 14. An alternation mechanism is provided at the front end of each rotating rod 12. The alternation mechanism is used to control several rotating rods 12 to rotate sequentially from right to left. The top end of each partition 4 is connected to the top end of the drum screen 1 through a compression spring.

[0048] During operation, when the detection mechanism detects that no more material is passing through the inside of the discharge cylinder 3, the alternating mechanism starts to drive the rotating rod 12 at the right end to rotate. The rotation of the rotating rod 12 at the right end causes the right end of the pressing plate 13 to flip downward. At this time, the unlocking mechanism unlocks the pressing rod 14, and the partition 4 at the right end moves upward under the push of the compression spring. The rotating rod 12 continues to drive the pressing plate 13 to rotate. When the pressing plate 13 is about to rotate one full turn, the pressing plate 13 moves and pushes the pressing rod 14 and the partition 4 downward. When the partition 4 returns to its initial position, the locking mechanism locks the pressing rod 14 again. At this time, the end of the pressing plate 13 passes over the surface of the pressing rod 14, thereby realizing the opening and resetting of the partition 4.

[0049] As a further embodiment of the present invention, the locking mechanism includes a second mounting post 15 fixedly mounted on the top right end of the mounting plate 10. A wedge rod 16 is slidably connected to the middle of the top end of the second mounting post 15 via a tension spring. The wedge end of the wedge rod 16 blocks the top end of the pressing rod 14. A serpentine rod 17 is provided at the front end of the second mounting post 15. An insertion rod 18 is fixedly mounted at the bottom end of the serpentine rod 17. The bottom end of the insertion rod 18 passes through the mounting plate 10 and is slidably connected to it. A push-pull rod 19 is fixedly mounted on the front right end of the wedge rod 16. The front end of the push-pull rod 19 corresponds to the right inclined end of the serpentine rod 17.

[0050] During operation, the right end of the pressing plate 13 flips downward to press the left end of the serpentine rod 17 downward. The downward movement of the left end of the serpentine rod 17 pushes the push-pull rod 19 to the right through the right inclined end. The push-pull rod 19 moves to the right, pushing the wedge rod 16 to the right, thereby unlocking the pressing rod 14. When the end of the pressing plate 13 passes the left end of the serpentine rod 17, the wedge rod 16 is no longer subjected to external force and resets under the action of the tension spring. At this time, the serpentine rod 17 resets under the action of the push-pull rod 19, preparing for the next unlocking.

[0051] As a further embodiment of the present invention, the alternating mechanism includes a drive roller 20 rotatably connected to the top of the front end of the mounting frame 9, a first motor 21 fixedly mounted on the top end of the mounting frame 9, the output end of the first motor 21 being connected to the drive roller 20, a plurality of third mounting posts 22 fixedly mounted on the top end of the mounting frame 9, each third mounting post 22 having a rotating shaft 23 rotatably connected to its top end, and a transmission wheel 24 fixedly mounted on the outer side of each rotating shaft 23. The lengths of the plurality of rotating rods 12 are all different. The rear end of the rotating shaft 23 located at the front right end is connected to the front end of the first rotating rod 12 from right to left via a transmission belt 25, and the rear end of the rotating shaft 23 located at the rear right end is connected to the front end of the second rotating rod 12 from right to left via a transmission belt 25. The two ends are connected. The rear end of the rotating shaft 23 located at the front of the left end is connected to the front end of the first rotating rod 12 from left to right via the transmission belt 25. The rear end of the rotating shaft 23 located at the middle of the left end is connected to the front end of the second rotating rod 12 from left to right via the transmission belt 25. The rear end of the rotating shaft 23 located at the rear of the left end is connected to the front end of the third rotating rod 12 from left to right via the transmission belt 25. Four sets of arc-shaped transmission blocks 26 are fixedly installed on the outer side of the drive roller 20. The two arc-shaped transmission blocks 26 at the left and right ends correspond to the transmission wheels 24 at the front, rear, and front of the left end, respectively. The two arc-shaped transmission blocks 26 at the bottom end correspond to the transmission wheels 24 at the middle of the left end and the rear of the right end, respectively.

[0052] During operation, when no more material passes through the inner sides of several discharge cylinders 3, the first motor 21 starts to drive the drive drum 20 to rotate. Figure 8 and Figure 9As shown, the drive roller 20 rotates, causing several arc-shaped transmission blocks 26 to rotate counterclockwise. The third arc-shaped transmission block 26 moves from front to back, causing the transmission wheel 24 at the right front end to rotate. The rotation of the right front transmission wheel 24 drives the first rotating rod 12 from right to left to rotate via the transmission belt 25. When the third arc-shaped transmission block 26 passes over the surface of the transmission wheel 24, the fourth arc-shaped transmission block 26 moves from front to back, simultaneously driving the transmission wheel 24 at the right rear end to rotate. The rotation of the right rear end transmission wheel 24 drives the second rotating rod 12 from right to left to rotate via the transmission belt 25. When the fourth arc-shaped transmission block 26 stops driving, the third arc-shaped transmission block 26 moves from front to back... 6. While moving, it drives the transmission wheel 24 at the left rear end to rotate. The rotation of the transmission wheel 24 at the left rear end drives the third transmission wheel 24 from right to left to rotate via the conveyor belt. When the third arc-shaped transmission block 26 from front to back stops driving, the second arc-shaped transmission block 26 from front to back drives the transmission wheel 24 in the middle of the left side to rotate, thereby driving the fourth rotating rod 12 from right to left to rotate. When the second arc-shaped transmission block 26 from front to back stops driving, the arc-shaped transmission block 26 at the front end drives the first rotating rod 12 on the left side to rotate. When the arc-shaped transmission block 26 at the front end stops driving, the drive roller 20 and several arc-shaped transmission blocks 26 all return to their initial positions, thus preparing for the next group of drives.

[0053] As a further embodiment of the present invention, the detection mechanism includes mounting blocks 27 fixedly installed on the inner walls of both the front and rear ends of the discharge cylinder 3. Two inclined plates 28 are provided on the inner side of the discharge cylinder 3. A lifting rod 29 is fixedly installed at the bottom end of each inclined plate 28. The bottom end of each lifting rod 29 passes through the mounting block 27 and is slidably connected to it. The bottom end of each inclined plate 28 is connected to the mounting block 27 by a compression spring. Two adjacent inclined plates 28 are fixedly connected to each other. A push plate 30 is fixedly installed on the rear side of the bottom end of each rear lifting rod 29. A synchronization plate 31 is slidably connected to the rear end of several discharge cylinders 3 by a tension spring. The bottom end of the push plate 30 is in contact with the synchronization plate 31. A sensor 32 is fixedly installed at the rear end of the right discharge cylinder 3. The top right end of the synchronization plate 31 is in contact with the sensor 32.

[0054] During operation, when material falls into the discharge cylinder 3, it lands on the surface of the inclined plate 28. The inclined plate 28 is compressed and moves downward. The material slides across the surface of the inclined plate 28 and is discharged downward. The downward movement of the inclined plate 28, compressed by the lifting rod 29 and the push plate 30, pushes the synchronous plate 31 downward. When there is no more material on the surface of all the inclined plates 28, the synchronous plate 31 is no longer compressed and returns to its initial position under the action of the tension spring. At this time, the top right end of the synchronous plate 31 contacts the sensor 32 again. The sensor 32 drives the first motor 21 to run, thereby realizing the self-detection of the screening degree.

[0055] As a further embodiment of the present invention, the driving mechanism includes toothed rings 33 fixedly installed on the outer side of the left end of the cylindrical filter screen 2, a second motor 34 fixedly installed on the rear side of the right end of the drum screen 1, a synchronizing rod 35 fixedly installed at the output end of the second motor 34, and a plurality of gears 36 corresponding one-to-one with the toothed rings 33 fixedly installed on the outer side of the synchronizing rod 35, and the gears 36 meshing with the adjacent toothed rings 33.

[0056] During operation, the second motor 34 starts and drives the synchronous rod 35 to rotate. The rotation of the synchronous rod 35 drives several gears 36 to rotate synchronously. The rotation of the gears 36 drives several cylindrical filter screens 2 to rotate synchronously through the gear ring 33, thus providing power for the rotation of the cylindrical filter screens 2. The rotation of the cylindrical filter screens 2 drives the limiting ring 6 to rotate between two adjacent limiting frames 5. At this time, the limiting frame 5 supports the limiting ring 6 and the cylindrical filter screens 2.

[0057] As a further embodiment of the present invention, a disc 37 is rotatably connected to the bottom left side of the partition 4. The bottom end of the disc 37 is in contact with the inner wall of the cylindrical filter screen 2. Two levers 38 are fixedly installed on the left end of the disc 37.

[0058] During operation, the rotation of the cylindrical filter screen 2 drives the rotation of the disc 37, and the rotation of the disc 37 drives the lever 38 to move the material inside the cylindrical filter screen 2, thereby speeding up the filtering of the material from the bottom of the cylindrical filter screen 2. When the partition 4 moves upward, the partition 4 drives the disc 37 and the lever 38 to move upward synchronously, so as not to obstruct the transfer of the material.

Claims

1. A screening device for preparing ultra-durable concrete using recycled aggregate from construction waste, characterized in that: The drum screen includes a drum screen with several cylindrical filter screens (2) installed on the inner side of the drum screen via a drive mechanism. The mesh count of the several cylindrical filter screens (2) is different. The drive mechanism is used to drive the several cylindrical filter screens (2) to rotate continuously. The bottom end of the drum screen is provided with several discharge cylinders (3) corresponding to the cylindrical filter screens (2). A detection mechanism is provided at the bottom opening of the discharge cylinder (3). The detection mechanism is used to detect the amount of material discharged from the bottom end of the discharge cylinder (3). A partition (4) is provided between two adjacent cylindrical filter screens (2) via an opening and closing mechanism. The opening and closing mechanism is used to drive the partition (4) to open and close sequentially from right to left when the detection mechanism detects that there is no more material passing through the several discharge cylinders (3). The opening and closing mechanism includes several sets of limiting frames (5) fixedly installed inside the drum screen. Several arc-shaped supports (7) are fixedly installed inside the drum screen. The arc-shaped supports (7) are located between two adjacent cylindrical filter screens (2) and are in close contact with them. Several limiting boxes (8) corresponding to the arc-shaped supports (7) are fixedly installed at the top of the drum screen. The partition (4) is located inside the limiting box (8) and its bottom end is in close contact with the arc-shaped support (7). The top of the partition (4) is provided with a lifting mechanism. The lifting mechanism is used to drive the partition (4) to move up and down sequentially when there is no more material passing through the discharge cylinder (3). The lifting mechanism includes a mounting frame (9) installed at the front end of the drum screen. Several mounting plates (10) corresponding to the partition (4) are fixedly installed on the rear side of the top of the mounting frame (9). A first mounting column (11) is fixedly installed on the top left end of each mounting plate (10). A rotating rod (12) is rotatably connected to the top of the first mounting column (11). A pressing plate (13) is fixedly installed on the right side of each rotating rod (12). A pressing rod (14) is fixedly installed on the front side of the top of each partition (4). The right end of the pressing plate (13) corresponds to the front end of the pressing rod (14). A locking mechanism is provided on the top right end of the mounting plate (10). The locking mechanism is used to limit the pressing rod (14). An alternation mechanism is provided on the front end of the rotating rod (12). The alternation mechanism is used to control several rotating rods (12) to rotate sequentially from right to left. The top of each partition (4) is connected to the top of the drum screen through a compression spring. The pressing plate (13) flips downwards, the locking mechanism unlocks the pressing rod (14), the rotating rod (12) continues to drive the pressing plate (13) to rotate, when the pressing plate (13) is about to rotate one full turn, the pressing plate (13) moves and pushes the pressing rod (14) and the partition (4) to move downwards, when the partition (4) returns to the initial position, the locking mechanism locks the pressing rod (14) again; The locking mechanism includes a second mounting post (15) fixedly mounted on the top right end of the mounting plate (10). A wedge rod (16) is slidably connected to the middle of the top end of the second mounting post (15) via a tension spring. The wedge end of the wedge rod (16) blocks the top end of the pressing rod (14). A serpentine rod (17) is provided at the front end of the second mounting post (15). An insert rod (18) is fixedly mounted at the bottom end of the serpentine rod (17). The bottom end of the insert rod (18) passes through the mounting plate (10) and is slidably connected to it. A push-pull rod (19) is fixedly mounted on the front right end of the wedge rod (16). The front end of the push-pull rod (19) corresponds to the right inclined end of the serpentine rod (17). The alternating mechanism includes a drive roller (20) rotatably connected to the top of the front end of the mounting frame (9). Several third mounting columns (22) are fixedly mounted on the top of the mounting frame (9). Each of the third mounting columns (22) is rotatably connected to a rotating shaft (23). A transmission wheel (24) is fixedly mounted on the outer side of each rotating shaft (23). Several rotating rods (12) have different lengths. The rear end of the rotating shaft (23) located on the front right end is connected to the front end of the first rotating rod (12) from right to left via a transmission belt (25). The rear end of the rotating shaft (23) located on the rear right end is connected to the front end of the second rotating rod (12) from right to left via a transmission belt (25). The rear end of the rotating shaft (23) located on the front left end is connected to the front end of the second rotating rod (12) from right to left via a transmission belt (25). The belt (25) is connected to the front end of the first rotating rod (12) from left to right. The rear end of the rotating shaft (23) located in the middle of the left end is connected to the front end of the second rotating rod (12) from left to right via the transmission belt (25). The rear end of the rotating shaft (23) located on the rear side of the left end is connected to the front end of the third rotating rod (12) from left to right via the transmission belt (25). Four sets of arc-shaped transmission blocks (26) are fixedly installed on the outside of the drive roller (20). The two arc-shaped transmission blocks (26) at the left and right ends correspond to the transmission wheels (24) on the front side of the left end, the rear side of the left end, and the front side of the right end, respectively. The two arc-shaped transmission blocks (26) at the bottom end correspond to the transmission wheels (24) on the middle of the left end and the rear side of the right end, respectively.

2. A screening device for preparing ultra-durable concrete using recycled aggregate from construction waste according to claim 1, characterized in that: Limiting rings (6) are fixedly installed on the outer side of each cylindrical filter screen (2). The limiting rings (6) are located inside the two adjacent limiting frames (5) and are slidably connected to them.

3. A screening device for preparing ultra-durable concrete using recycled aggregate from construction waste according to claim 1, characterized in that: The detection mechanism includes mounting blocks (27) fixedly installed on the inner walls of both ends of the discharge cylinder (3). Two inclined plates (28) are provided on the inner side of the discharge cylinder (3). A lifting rod (29) is fixedly installed at the bottom end of each inclined plate (28). The bottom end of each lifting rod (29) passes through the mounting block (27) and is slidably connected to it. The bottom end of each inclined plate (28) is connected to the mounting block (27) by a compression spring. Two adjacent inclined plates (28) are fixedly connected to each other. A push plate (30) is fixedly installed on the rear side of the bottom end of the rear lifting rod (29). A synchronization plate (31) is slidably connected to the rear end of several discharge cylinders (3) by a tension spring. The bottom end of the push plate (30) is in contact with the synchronization plate (31). A sensor (32) is fixedly installed at the rear end of the right discharge cylinder (3). The top right end of the synchronization plate (31) is in contact with the sensor (32).

4. A screening device for preparing ultra-durable concrete using recycled aggregate from construction waste according to claim 1, characterized in that: The drive mechanism includes toothed rings (33) fixedly installed on the outer side of the left end of the cylindrical filter screen (2), a second motor (34) fixedly installed on the rear right end of the drum screen (1), a synchronizing rod (35) fixedly installed at the output end of the second motor (34), and several gears (36) corresponding one-to-one with the toothed rings (33) fixedly installed on the outer side of the synchronizing rod (35), and the gears (36) mesh with the adjacent toothed rings (33).

5. A screening device for preparing ultra-durable concrete using recycled aggregate from construction waste according to claim 1, characterized in that: The top of the mounting bracket (9) is fixedly mounted with a first motor (21), and the output end of the first motor (21) is connected to the drive roller (20).

6. A screening device for preparing ultra-durable concrete using recycled aggregate from construction waste according to claim 1, characterized in that: A disc (37) is rotatably connected to the left side of the bottom end of the partition (4). The bottom end of the disc (37) is in contact with the inner wall of the cylindrical filter screen (2). Two levers (38) are fixedly installed on the left end of the disc (37).

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