A multi-stage screening device for solid waste treatment

Abstract

This invention discloses a multi-stage screening device for solid waste treatment, relating to the field of solid waste screening technology. It includes a housing, inside which are respectively arranged a first screen plate and a second screen plate for screening solid waste. The screen aperture of the second screen plate is smaller than that of the first screen plate. Both the first and second screen plates are horizontally arranged inside the housing, with the second screen plate located below the first screen plate. A support plate is arranged below the second screen plate. A baffle frame is fixedly connected to the top of both the first and second screen plates to prevent material leakage during screening. A feed inlet is fixedly connected to the top of the housing. This invention enables directional discharge of slag after screening, solving the problem of unloading from horizontal screens and avoiding interference with the screening process through indirect unloading design. The baffle frame also prevents slag leakage, reducing secondary pollution.

Description

Technical Field

[0001] This invention relates to the field of solid waste screening technology, and more specifically, to a multi-stage screening device for solid waste treatment. Background Technology

[0002] With the acceleration of urbanization and the surge in the amount of municipal solid waste generated, incineration of municipal solid waste has been widely adopted due to its significant effects in reducing volume and rendering it harmless. However, the incineration process produces a large amount of slag, which has a complex composition, including non-metallic particles such as glass and ceramics, as well as metallic impurities such as iron nails and iron sheets, and ash of different particle sizes. If the slag is not effectively screened and classified, it will not only waste recyclable resources, but also affect its resource utilization in building materials and other fields due to excessive impurities. Therefore, accurate grading and component separation of slag is of great practical significance.

[0003] Currently, screening equipment for municipal solid waste incineration slag has many limitations. Some equipment can only screen a single particle size, making it difficult to meet the needs of multi-stage resource utilization of slag for materials of different particle sizes. Furthermore, many multi-stage screening devices use inclined screens to facilitate collection of the screened slag. While this incline improves efficiency and makes collection easier, it can also lead to the slag rolling too fast on the screen, resulting in incomplete screening. In addition, most existing equipment lacks the function of simultaneously separating metallic impurities from the slag, requiring additional magnetic separation equipment, which increases the processing time and cost. Therefore, there is an urgent need for a multi-stage screening device for solid waste treatment to solve these problems. Summary of the Invention

[0004] In view of the problems in related technologies, the present invention proposes a multi-stage screening device for solid waste treatment to overcome the above-mentioned technical problems existing in the existing related technologies.

[0005] The technical solution of this invention is implemented as follows:

[0006] A multi-stage screening device for solid waste treatment includes a housing. Inside the housing, a first screen plate and a second screen plate are respectively arranged for screening solid waste. The screen aperture of the second screen plate is smaller than that of the first screen plate. Both the first and second screen plates are horizontally arranged inside the housing, with the second screen plate located below the first screen plate. A support plate is arranged below the second screen plate. A baffle frame to prevent material leakage during screening is fixedly connected to the top of both the first and second screen plates. A feed inlet is fixedly connected to the top of the housing, and a base frame is fixedly connected to the bottom of the housing. A control console is arranged on one outer wall of the housing.

[0007] The outer wall of the box is fixedly connected to a protective cover, and the inside of the protective cover is provided with a swinging component for driving the first screen plate and the second screen plate to shake.

[0008] One end of the box is equipped with a magnetic separation component for classifying metal materials in solid waste;

[0009] The inside of the box is equipped with a material unloading assembly.

[0010] Preferably, the swing assembly includes a first motor fixedly connected to one outer wall of the protective cover, a third rotating column fixedly connected to the output end of the first motor, cranks evenly distributed on the outer circumference of the third rotating column, a connecting rod rotatably connected to one end of the cranks away from the third rotating column, a rotating seat rotatably connected to the other end of the connecting rod, a connecting plate fixedly connected to one outer wall of the rotating seat, springs evenly distributed on one outer wall of the connecting plate, reinforcing plates fixedly connected to one side of each of the three baffle frames, an impact column fixedly connected to one outer wall of the reinforcing plate at the end of the spring away from the connecting plate, and an elastic column fixedly connected to the inside of the housing.

[0011] Preferably, slides are fixedly connected to both inner walls of the box body, and rolling seats are fixedly connected to both outer walls of the baffle frame. A roller is rotatably connected to one side of the rolling seat, and the roller is in rolling connection with the slide.

[0012] Preferably, a discharge trough is provided at one end of the baffle frame, and a rotating shaft is fixedly connected to both outer walls of the baffle frame. A sealing plate is rotatably connected to the baffle frame through the rotating shaft, and a counterweight is fixedly connected to the bottom end of the sealing plate. A fixing groove is provided at one end of the box body, and a second unloading hopper is fixedly connected inside the fixing groove. The second unloading hopper is located below the discharge trough.

[0013] Preferably, one end of the third rotating column is fixedly connected to a first rotating column, a rotating disk is fixedly connected to the outer circumference of the first rotating column, a sector-shaped toothed plate is fixedly connected to the outer circumference of the rotating disk, the first rotating column is rotatably connected to the protective cover, a second rotating column is rotatably connected to one inner wall of the protective cover, and a gear disk is fixedly connected to the outer circumference of the second rotating column, the gear disk meshing with the sector-shaped toothed plate.

[0014] Preferably, a first helical gear is fixedly connected to the outer circumference of the second rotating column, a second helical gear meshes with the outer circumference of the first helical gear, a rotating rod is fixedly connected to the inner circumference of the second helical gear, a stabilizing plate is fixedly connected to one side of the inner wall of the protective cover, the rotating rod is rotatably connected to the stabilizing plate, a first transmission wheel is fixedly connected to the end of the rotating rod away from the second helical gear, a transmission belt is drivenly connected to the outer circumference of the first transmission wheel, and the first transmission wheel is drivenly connected to the second transmission wheel through the transmission belt.

[0015] Preferably, a threaded screw is fixedly connected to the inner circumference of the second transmission wheel, the threaded screw is rotatably connected to the inner walls of both sides of the protective cover, a threaded sleeve is threadedly connected to the outer circumference of the threaded screw, a horizontal column is fixedly connected to the outer circumference of the threaded sleeve, a ramp is fixedly connected to the top of the horizontal column, and a rectangular groove is formed on the inner bottom wall of the slide block, the rectangular groove cooperating with the ramp.

[0016] Preferably, a second curved column is fixedly connected to the outer circumference of the horizontal column, the other end of the second curved column is fixedly connected to another horizontal column, a guide cylinder is fixedly connected to one end of the other horizontal column, a protective shell is fixedly connected to one side of the outer wall of the box, guide columns are fixedly connected to both sides of the inner wall of the protective shell, the guide cylinder is slidably connected to the outer circumference of the guide column, a first through groove is opened on both sides of the inner wall of the box, and one end of the horizontal column passes through the inside of the first through groove.

[0017] Preferably, the unloading assembly includes a connecting column fixedly connected to the outer circumferential wall of the guide cylinder and the threaded sleeve, a second toothed rod fixedly connected to the other end of the connecting column, a reversing gear meshing on one side of the second toothed rod, a first toothed rod meshing on the outer circumferential wall of the reversing gear, a horizontal plate fixedly connected to one side of the first toothed rod, a first bent column fixedly connected to the bottom outer wall of the horizontal plate, an elastic rod fixedly connected to the outer circumferential wall of the first bent column, the elastic rod being located on one side of the sealing plate, and the horizontal plate passing through the inside of the first through groove.

[0018] Preferably, the magnetic separation assembly includes a first discharge hopper fixedly connected to one end of the housing, a second motor fixedly connected to one outer wall of the first discharge hopper, a magnetic separation roller fixedly connected to the output end of the second motor, the magnetic separation roller being located below the end of the second discharge hopper, the first discharge hopper being located below the second discharge hopper, and scrapers for cleaning the metal adsorbed on the outer wall of the magnetic separation roller being fixedly connected to both inner walls of the magnetic separation roller.

[0019] The beneficial effects of this invention are:

[0020] This invention provides a multi-stage screening device for solid waste treatment. In terms of screening and unloading efficiency, the first and second horizontally arranged screen plates complete the screening process under the action of a swing assembly. Simultaneously, a first motor drives a third rotating column to rotate, which in turn drives the baffle frame and screen plates to reciprocate left and right via a crank and connecting rod. Compared to traditional inclined screens, the horizontal arrangement allows the slag to remain on the screen surface for a longer time, avoiding insufficient screening caused by excessive rolling. Furthermore, during the movement of the baffle frame, the impact columns on the reinforcing plate continuously impact the elastic columns inside the housing. Combined with the elastic action of the springs between the connecting plate and the reinforcing plate, this generates high-frequency vibration, effectively preventing slag from clogging the screen holes. Significantly improving screening accuracy, during the unloading stage, the third rotating column, in conjunction with the first rotating column, gear disk, and other structures, ultimately drives the threaded screw to rotate. This causes the threaded sleeve to lift the inclined platform from the rectangular groove into the slide. As the rollers on both sides of the baffle frame roll along the inclined platform, the screen plate is tilted. Simultaneously, the threaded sleeve drives the second rack and reversing gear through the connecting column, causing the first rack to move the elastic rod down to one side of the sealing plate. During the reciprocating motion of the baffle frame, the sealing plate is pushed open by the elastic rod, achieving directional discharge of the slag after screening. This not only solves the problem of unloading horizontal screens but also avoids affecting the screening process through indirect unloading design. The baffle frame also prevents slag leakage and reduces secondary pollution.

[0021] This invention provides a multi-stage screening device for solid waste treatment. Through the synchronous operation of magnetic separation components, it achieves efficient separation of metals and non-metals, simplifying the processing flow. When the screened slag is discharged from the second discharge hopper, the magnetic separation roller driven by the second motor is located directly below the discharge path. Its strong magnetism can quickly adsorb metal impurities such as iron nails and iron pieces mixed in the slag. As the magnetic separation roller rotates, the adsorbed metal is carried to the scraper position and is forcibly scraped off and collected by the scraper, while the non-metallic slag falls directly into the first discharge hopper below. No additional magnetic separation equipment is required, reducing equipment investment and operating costs. At the same time, the three sets of magnetic separation rollers correspond to the discharge ports of different screening stages, which can specifically adsorb metals in slag of different particle sizes, improving the comprehensiveness and accuracy of metal separation and facilitating subsequent resource recycling. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall front structure of the present invention.

[0024] Figure 2 This is a schematic diagram of the overall rear structure of the present invention.

[0025] Figure 3 This is a schematic diagram of the internal structure of the protective cover of the present invention.

[0026] Figure 4 For the present invention Figure 3 A magnified structural diagram of point A in the middle.

[0027] Figure 5 This is a schematic diagram of the disassembled protective shell structure of the present invention.

[0028] Figure 6 This is a schematic diagram of the overall half-sectional structure of the present invention.

[0029] Figure 7 For the present invention Figure 6 A magnified structural diagram at point B in the middle.

[0030] Figure 8 This is a schematic diagram showing the internal structure of the box of the present invention.

[0031] Figure 9 For the present invention Figure 8 A magnified structural diagram at point C.

[0032] Figure 10 This is a schematic diagram of the slide block structure of the present invention.

[0033] Figure 11 For the present invention Figure 10 A magnified structural diagram at point D.

[0034] In the picture:

[0035] 1. Housing; 2. First motor; 3. Feed inlet; 4. Protective cover; 5. Control console; 6. Base frame; 7. First discharge hopper; 8. Second discharge hopper; 9. Second motor; 10. Magnetic separator roller; 11. Protective shell; 12. Connecting column; 13. First through slot; 14. First gear; 15. Fixed slot; 16. Rotating disk; 17. Sector-shaped gear plate; 18. First rotating column; 19. Transmission belt; 20. First transmission wheel; 21. Second transmission wheel; 22. Threaded screw; 23. Threaded sleeve; 24. Gear disk; 25. First helical gear; 26. Second rotating column; 27. Second helical gear; 28. Stabilizer 29. Plate; 30. Guide cylinder; 31. Guide column; 32. First screen plate; 33. Second screen plate; 34. Bearing plate; 35. Material stop frame; 36. Sealing plate; 37. Elastic rod; 38. First curved column; 39. Horizontal plate; 40. Third rotating column; 41. Crank; 42. Connecting rod; 43. Rotating seat; 44. Connecting plate; 45. Spring; 46. Impact column; 47. Elastic column; 48. Slide seat; 59. Discharge chute; 50. Rotating shaft; 51. Roller; 52. Rolling seat; 53. Rectangular groove; 54. Inclined platform; 55. Horizontal column; 56. Second curved column; 57. Reversing gear; 58. Second toothed rod. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0037] Please see Figures 1-11 A multi-stage screening device for solid waste treatment includes a housing 1. Inside the housing 1, a first screen plate 31 and a second screen plate 32 are respectively provided for screening solid waste. The screen aperture of the second screen plate 32 is smaller than that of the first screen plate 31. The first screen plate 31 and the second screen plate 32 are both horizontally arranged inside the housing 1. The second screen plate 32 is located below the first screen plate 31. A support plate 33 is provided below the second screen plate 32. A baffle frame 34 to prevent material leakage during screening is fixedly connected to the top of the first screen plate 31 and the second screen plate 32. A feed inlet 3 is fixedly connected to the top of the housing 1. A base frame 6 is fixedly connected to the bottom of the housing 1. A control console 5 is provided on one side of the outer wall of the housing 1.

[0038] A protective cover 4 is fixedly connected to the outer wall of the housing 1. The inside of the protective cover 4 is provided with a swinging component for driving the first screen plate 31 and the second screen plate 32 to shake.

[0039] One end of the housing 1 is equipped with a magnetic separation component for classifying metal materials in solid waste;

[0040] The interior of housing 1 is equipped with a discharge assembly.

[0041] Furthermore, the swing assembly includes a first motor 2 fixedly connected to one side of the outer wall of the protective cover 4. A third rotating column 39 is fixedly connected to the output end of the first motor 2. Cranks 40, evenly distributed, are fixedly connected to the outer circumference of the third rotating column 39. A connecting rod 41 is rotatably connected to one end of the cranks 40 away from the third rotating column 39. A rotating seat 42 is rotatably connected to the other end of the connecting rod 41. A connecting plate 43 is fixedly connected to one side of the outer wall of the rotating seat 42. Springs 44, evenly distributed, are fixedly connected to one side of the connecting plate 43. Reinforcing plates are fixedly connected to one side of each of the three baffle frames 34. The end of each spring 44 away from the connecting plate 43 is fixedly connected to one side of the reinforcing plate. An impact column 45 is fixedly connected to one side of the reinforcing plate. An elastic column 46 is fixedly connected inside the housing 1. The first motor 2 can drive the third rotating column 39 to rotate. During the rotation of the third rotating column 39, it can... The crank 40 rotates, and the connecting rod 41 connected to the other end of the crank 40 rotates together. At this time, the rotation of the crank 40 can drive multiple baffle frames 34, the first screen plate 31, the second screen plate 32 and the bearing plate 33 to move back and forth, thereby effectively screening the slag inside the baffle frame 34. Since the first screen plate 31 and the second screen plate 32 are both horizontally set, it is ensured that the slag can be screened evenly during the reciprocating motion, avoiding the situation in traditional inclined screening where the slag rolls and falls too fast, resulting in insufficient screening. During the horizontal movement of the baffle frame 34, the impact column 45 on one side will collide with the elastic column 46 inside the box 1. At the same time, with the help of multiple sets of springs 44 on one side of the connecting plate 43, vibration can be effectively generated, thereby improving the screening efficiency of the first screen plate 31 and the second screen plate 32 for slag.

[0042] Furthermore, slide blocks 47 are fixedly connected to both inner walls of the box 1, and rolling blocks 52 are fixedly connected to both outer walls of the baffle frame 34. A roller 51 is rotatably connected to one side of the rolling block 52. The roller 51 is rotatably connected to the slide block 47. The roller 51 rolls inside the rolling block 52, which effectively ensures the stability of the reciprocating motion and vibration process of the baffle frame 34.

[0043] Furthermore, a discharge trough 49 is provided at one end of the baffle frame 34, and a rotating shaft 50 is fixedly connected to both outer walls of the baffle frame 34. A sealing plate 35 is rotatably connected to the baffle frame 34 through the rotating shaft 50. A counterweight is fixedly connected to the bottom end of the sealing plate 35. A fixing groove 15 is provided at one end of the box body 1. A second unloading hopper 8 is fixedly connected inside the fixing groove 15. The second unloading hopper 8 is located below the discharge trough 49.

[0044] Furthermore, a first rotating column 18 is fixedly connected to one end of the third rotating column 39. A rotating disk 16 is fixedly connected to the outer circumference of the first rotating column 18. A sector-shaped toothed plate 17 is fixedly connected to the outer circumference of the rotating disk 16. The first rotating column 18 is rotatably connected to the protective cover 4. A second rotating column 26 is rotatably connected to the inner wall of one side of the protective cover 4. A gear disk 24 is fixedly connected to the outer circumference of the second rotating column 26. The gear disk 24 meshes with the sector-shaped toothed plate 17. During the process of the first motor 2 driving the third rotating column 39 to rotate, the third rotating column 39 will drive the first rotating column 18 at its end to rotate together. When the first rotating column 18 rotates, it will drive the rotating disk 16 fixed to its outer wall to rotate together. At the same time, the sector-shaped toothed plate 17 that meshes with the gear disk 24 is fixedly connected to the outer circumference of the rotating disk 16. Therefore, when the rotating disk rotates to the point where the sector-shaped toothed plate 17 meshes with the gear disk 24, it can drive the gear disk 24 to rotate together.

[0045] Furthermore, a first helical gear 25 is fixedly connected to the outer circumference of the second rotating column 26, and a second helical gear 27 meshes with the outer circumference of the first helical gear 25. A rotating rod is fixedly connected to the inner circumference of the second helical gear 27. A stabilizing plate 28 is fixedly connected to one side of the inner wall of the protective cover 4. The rotating rod is rotatably connected to the stabilizing plate 28. A first transmission wheel 20 is fixedly connected to the end of the rotating rod away from the second helical gear 27. A transmission belt 19 is driven to the outer circumference of the first transmission wheel 20. The first transmission wheel 20 is driven to the second transmission wheel 20 via the transmission belt 19. When the gear disk 24 rotates, the driving wheel 21 can drive the second rotating column 26 fixed on its inner circumference to rotate together. When the second rotating column 26 rotates, it can drive the first helical gear 25 to rotate together. At the same time, the first helical gear 25 and the second helical gear 27 mesh with each other, thereby driving the second helical gear 27 and the rotating rod to rotate together. During the rotation of the rotating rod, the first transmission wheel 20 fixed on its outer wall will also rotate together. Meanwhile, the first transmission wheel 20 can drive the second transmission wheel 21 to rotate through the transmission belt 19.

[0046] Furthermore, a threaded screw 22 is fixedly connected to the inner circumference of the second transmission wheel 21. The threaded screw 22 is rotatably connected to the inner walls of both sides of the protective cover 4. A threaded sleeve 23 is threadedly connected to the outer circumference of the threaded screw 22. A horizontal column 55 is fixedly connected to the outer circumference of the threaded sleeve 23. A ramp 54 is fixedly connected to the top of the horizontal column 55. A rectangular groove 53 is provided on the inner bottom wall of the slide block 47. The rectangular groove 53 cooperates with the ramp 54. When the second transmission wheel 21 rotates, the threaded screw 22 fixed to its inner circumference will also rotate with it, thereby enabling the threaded sleeve 23 threadedly connected to its outer wall to drive the horizontal column 55 to rotate vertically. As the horizontal column 55 moves vertically upward, it applies an upward lifting force to the inclined platform 54, allowing the inclined platform 54 to rise through the rectangular groove 53 into the interior of the slide block 47. As the inclined platform 54 rises, the baffle frame 34 reciprocates, and the rollers 51 on both sides rise along the inclined platform 54. This causes the baffle frame 34 and its internal first screen plate 31, second screen plate 32, and bearing plate 33 to be tilted and shaken, effectively discharging the fully screened slag from the first screen plate 31 and second screen plate 32 to the end of the discharge chute 49 for rapid subsequent discharge.

[0047] Furthermore, a second bent column 56 is fixedly connected to the outer circumference of the horizontal column 55, and the other end of the second bent column 56 is fixedly connected to another horizontal column 55. A guide cylinder 29 is fixedly connected to one end of the other horizontal column 55. A protective shell 11 is fixedly connected to one side of the outer wall of the box body 1. Guide columns 30 are fixedly connected to both sides of the inner wall of the protective shell 11. The guide cylinder 29 is slidably connected to the outer circumference of the guide column 30. A first through groove 13 is opened on both sides of the inner wall of the box body 1. One end of the horizontal column 55 passes through the inside of the first through groove 13.

[0048] Furthermore, the unloading assembly includes a connecting post 12 fixedly connected to the outer circumferential wall of the guide cylinder 29 and the threaded sleeve 23. A second toothed rod 58 is fixedly connected to the other end of the connecting post 12. A reversing gear 57 meshes with one side of the second toothed rod 58, and a first toothed rod 14 meshes with the outer circumferential wall of the reversing gear 57. A horizontal plate 38 is fixedly connected to one side of the first toothed rod 14, and a first bent post 37 is fixedly connected to the bottom outer wall of the horizontal plate 38. An elastic rod 36 is fixedly connected to the outer circumferential wall of the first bent post 37. The elastic rod 36 is located on one side of the sealing plate 35. The horizontal plate 38 passes through the inside of the first through groove 13. During the vertical movement of the threaded sleeve 23, the material is discharged through the connecting post... 12 can drive the second toothed rod 58 at its other end to move upward together. During the vertical movement of the second toothed rod 58, it can drive the reversing gear 57 to rotate. When the reversing gear 57 rotates, it will drive the first toothed rod 14 on its other side to move vertically downward, thereby driving the horizontal plate 38, the first bent column 37, and the elastic rod 36 to move vertically downward together until the elastic rod 36 moves to one side of the sealing plate 35. At this time, during the reciprocating motion of the baffle frame 34, the sealing plate 35 will contact the elastic column, thereby pushing the sealing plate 35 open through the elastic column, thus realizing the indirect unloading of the slag after screening and improving the screening efficiency of the slag.

[0049] Furthermore, the magnetic separation assembly includes a first discharge hopper 7 fixedly connected to one end of the housing 1. A second motor 9 is fixedly connected to one outer wall of the first discharge hopper 7. A magnetic separation roller 10 is fixedly connected to the output end of the second motor 9. The magnetic separation roller 10 is located below the end of the second discharge hopper 8, and the first discharge hopper 7 is located below the second discharge hopper 8. Scrapers for cleaning the metal adsorbed on the outer wall of the magnetic separation roller 10 are fixedly connected to both inner walls of the magnetic separation roller 10. When the screened slag falls from the second discharge hopper 8 onto the first discharge hopper 7, the metal slag in the slag will be adsorbed by the magnetic separation roller 10, which facilitates the unified recycling of the metal slag by subsequent staff. Moreover, the three sets of magnetic separation rollers 10 correspond to the discharge ports of different screening layers, which can specifically adsorb metals in slags of different particle sizes, improving the comprehensiveness and accuracy of metal separation and facilitating subsequent resource recycling.

[0050] In summary, with the aid of the above-mentioned technical solution of the present invention, during use, the worker adds the slag produced after the combustion of domestic waste into the box 1 through the feed inlet 3, and then starts the first motor 2. The first motor 2 drives the third rotating column 39 to rotate. During the rotation of the third rotating column 39, the crank 40 is driven to rotate. At the same time, the other end of the crank 40 is rotatably connected to the connecting rod 41 and rotates together. At this time, the rotation of the crank 40 can drive multiple baffle frames 34, the first screen plate 31, the second screen plate 32 and the bearing plate 33 to move back and forth, thereby enabling the baffle frames 34 to move back and forth. The internal slag is effectively screened, and since the first screen plate 31 and the second screen plate 32 are both horizontally set, it is ensured that the slag can be screened evenly during the reciprocating motion. This avoids the situation in traditional inclined screens where the slag rolls and feeds too quickly, resulting in insufficient screening. During the horizontal movement of the baffle frame 34, the impact column 45 on one side will collide with the elastic column 46 inside the box 1. At the same time, with the help of multiple sets of springs 44 on one side of the connecting plate 43, vibration can be effectively generated, thereby improving the screening efficiency of the first screen plate 31 and the second screen plate 32 for slag.

[0051] Furthermore, during the rotation of the third rotating column 39 driven by the first motor 2, the third rotating column 39 will drive the first rotating column 18 at its end to rotate together. When the first rotating column 18 rotates, it will drive the rotating disk 16 fixed on its outer wall to rotate together. At the same time, a sector-shaped toothed plate 17 that meshes with the gear disk 24 is fixedly connected to the outer circumference of the rotating disk 16. Therefore, when the disk rotates to the point where the sector-shaped toothed plate 17 meshes with the gear disk 24, it can drive the gear disk 24 to rotate together. When the gear disk 24 rotates, it can drive the second rotating column 26 fixed on its inner circumference to rotate together. When the second rotating column 26 rotates, it can drive the first helical gear 25 to rotate together. At the same time, the first helical gear 25 and the second helical gear 27 mesh with each other, thereby driving the second helical gear 27 and the rotating rod to rotate together. During the rotation of the rotating rod, the first transmission wheel 20 fixed on its outer wall will also rotate together with it. The first drive wheel 20 can drive the second drive wheel 21 to rotate through the drive belt 19. When the second drive wheel 21 rotates, the threaded screw 22 fixed on its inner circumference will also rotate with it, so that the threaded sleeve 23 threaded on its outer wall can drive the horizontal column 55 to move vertically upward together. When the horizontal column 55 moves vertically upward, it will apply an upward lifting force to the inclined platform 54, so that the inclined platform 54 can rise through the rectangular groove 53 to the inside of the slide block 47. When the inclined platform 54 rises, the baffle frame 34 will reciprocate again, and the rollers 51 on both sides will rise along the inclined platform 54, which will cause the baffle frame 34 and the first screen plate 31, the second screen plate 32 and the bearing plate 33 inside it to be tilted and shaken, so that the slag after being fully screened on the first screen plate 31 and the second screen plate 32 can be effectively discharged to the end of the discharge chute 49.

[0052] Meanwhile, during the vertical movement of the threaded sleeve 23, the connecting column 12 can drive the second toothed rod 58 at its other end to move upward together. During the vertical movement of the second toothed rod 58, the reversing gear 57 can be driven to rotate. When the reversing gear 57 rotates, it will drive the first toothed rod 14 on its other side to move vertically downward, thereby driving the horizontal plate 38, the first bent column 37, and the elastic rod 36 to move vertically downward together until the elastic rod 36 moves to one side of the sealing plate 35. At this time, during the reciprocating motion of the baffle frame 34, the sealing plate 35 will come into contact with the elastic column, thereby pushing the sealing plate 35 open through the elastic column, thus realizing the indirect unloading of the slag after screening and improving the screening efficiency of the slag.

[0053] When the screened slag falls from the second discharge hopper 8 onto the first discharge hopper 7, the metal slag in the slag will be adsorbed by the magnetic separation roller 10, which facilitates the unified recycling of the metal slag by the subsequent staff. The three sets of magnetic separation rollers 10 correspond to the discharge ports of different screening layers, and can specifically adsorb metals in slags of different particle sizes, improving the comprehensiveness and accuracy of metal separation and facilitating subsequent resource recycling.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-stage screening device for solid waste treatment, comprising a housing (1), characterized in that, The box (1) is equipped with a first screen plate (31) and a second screen plate (32) for screening solid waste. The first screen plate (31) and the second screen plate (32) are both horizontally arranged inside the box (1). A bearing plate (33) is arranged below the second screen plate (32). A baffle frame (34) to prevent material leakage during screening is fixedly connected to the top of the first screen plate (31) and the second screen plate (32). A feed inlet (3) is fixedly connected to the top of the box (1). A rotating shaft (50) is fixedly connected to the outer walls on both sides of the baffle frame (34). A sealing plate (35) is rotatably connected to the baffle frame (34) through the rotating shaft (50). The outer wall of the box (1) is fixedly connected to a protective cover (4), and the inside of the protective cover (4) is provided with a swinging component for driving the first screen plate (31) and the second screen plate (32) to shake. One end of the box (1) is provided with a magnetic separation component for classifying metal materials in solid waste; The box (1) is equipped with a discharge assembly. A second rotating column (26) is rotatably connected to the inner wall of one side of the protective cover (4). A first helical gear (25) is fixedly connected to the outer circumference of the second rotating column (26). A second helical gear (27) meshes with the outer circumference of the first helical gear (25). A rotating rod is fixedly connected to the inner circumference of the second helical gear (27). A first transmission wheel (20) is fixedly connected to the end of the rotating rod away from the second helical gear (27). A second transmission wheel (21) is driven by the first transmission wheel (20). A threaded screw (22) is fixedly connected to the inner circumference of the second transmission wheel (21). A threaded sleeve (23) is threadedly connected to the outer circumference of the threaded screw (22). A horizontal column (55) is fixedly connected to the outer circumference of the threaded sleeve (23), and a guide cylinder (29) is fixedly connected to one end of another horizontal column (55). The unloading assembly includes a connecting column (12) fixedly connected to the outer circumference of the guide cylinder (29) and the threaded sleeve (23). A second toothed rod (58) is fixedly connected to the other end of the connecting column (12). A reversing gear (57) meshes with one side of the second toothed rod (58). A first toothed rod (14) meshes with the outer circumference of the reversing gear (57). A horizontal plate (38) is fixedly connected to one side of the first toothed rod (14). A first bent column (37) is fixedly connected to the bottom outer wall of the horizontal plate (38). An elastic rod (36) is fixedly connected to the outer circumference of the first bent column (37).

2. The multi-stage screening device for solid waste treatment according to claim 1, characterized in that, The swing assembly includes a first motor (2) fixedly connected to the outer wall of one side of the protective cover (4). The output end of the first motor (2) is fixedly connected to a third rotating column (39). The outer circumferential wall of the third rotating column (39) is fixedly connected to cranks (40) distributed at equal intervals. The end of the cranks (40) away from the third rotating column (39) is rotatably connected to a connecting rod (41). The other end of the connecting rod (41) is rotatably connected to a rotating seat (42). The outer wall of one side of the rotating seat (42) is fixedly connected to a connecting plate (43). The outer wall of one side of the connecting plate (43) is fixedly connected to springs (44) distributed at equal intervals. One side of each of the three baffle frames (34) is fixedly connected to a reinforcing plate. The end of the spring (44) away from the connecting plate (43) is fixedly connected to the outer wall of one side of the reinforcing plate. The outer wall of one side of the reinforcing plate is fixedly connected to an impact column (45). The inside of the housing (1) is fixedly connected to an elastic column (46).

3. The multi-stage screening device for solid waste treatment according to claim 2, characterized in that, The inner walls of both sides of the box (1) are fixedly connected with slides (47), and the outer walls of both sides of the baffle frame (34) are fixedly connected with rollers (52). A roller (51) is rotatably connected to one side of the roller (52). The roller (51) is rotatably connected to the slide (47). The screen hole size of the second screen plate (32) is smaller than that of the first screen plate (31). The second screen plate (32) is located below the first screen plate (31). A base frame (6) is fixedly connected to the bottom of the box (1). A control console (5) is provided on one side of the outer wall of the box (1).

4. The multi-stage screening device for solid waste treatment according to claim 3, characterized in that, The baffle frame (34) has a discharge trough (49) at one end, the bottom end of the sealing plate (35) is fixedly connected with a counterweight strip, the box body (1) has a fixing groove (15) at one end, and a second unloading hopper (8) is fixedly connected inside the fixing groove (15). The second unloading hopper (8) is located below the discharge trough (49).

5. A multi-stage screening device for solid waste treatment according to claim 4, characterized in that, One end of the third rotating column (39) is fixedly connected to the first rotating column (18), the outer circumference of the first rotating column (18) is fixedly connected to the rotating disk (16), the outer circumference of the rotating disk (16) is fixedly connected to the fan-shaped toothed plate (17), the first rotating column (18) is rotatably connected to the protective cover (4), the outer circumference of the second rotating column (26) is fixedly connected to the gear disk (24), and the gear disk (24) meshes with the fan-shaped toothed plate (17).

6. A multi-stage screening device for solid waste treatment according to claim 5, characterized in that, A stabilizing plate (28) is fixedly connected to one side of the inner wall of the protective cover (4), and the rotating rod is rotatably connected to the stabilizing plate (28). A transmission belt (19) is connected to the outer circumference of the first transmission wheel (20).

7. A multi-stage screening device for solid waste treatment according to claim 6, characterized in that, The threaded screw (22) is rotatably connected to the inner walls of both sides of the protective cover (4). The top of the horizontal column (55) is fixedly connected to the ramp platform (54). The bottom inner wall of the slide (47) is provided with a rectangular groove (53), which cooperates with the ramp platform (54).

8. A multi-stage screening device for solid waste treatment according to claim 7, characterized in that, The outer circumferential wall of the horizontal column (55) is fixedly connected to a second curved column (56), and the other end of the second curved column (56) is fixedly connected to another horizontal column (55). A protective shell (11) is fixedly connected to one side of the outer wall of the box (1). Guide columns (30) are fixedly connected to both sides of the inner wall of the protective shell (11). The guide cylinder (29) is slidably connected to the outer circumferential wall of the guide column (30). A first through groove (13) is opened on both sides of the inner wall of the box (1). One end of the horizontal column (55) passes through the inside of the first through groove (13).

9. A multi-stage screening device for solid waste treatment according to claim 8, characterized in that, The elastic rod (36) is located on one side of the sealing plate (35), and the cross plate (38) passes through the inside of the first through groove (13).

10. A multi-stage screening device for solid waste treatment according to claim 9, characterized in that, The magnetic separation assembly includes a first discharge hopper (7) fixedly connected to one end of the housing (1), a second motor (9) fixedly connected to one side of the outer wall of the first discharge hopper (7), a magnetic separation roller (10) fixedly connected to the output end of the second motor (9), the magnetic separation roller (10) being located below the end of the second discharge hopper (8), the first discharge hopper (7) being located below the second discharge hopper (8), and scrapers for cleaning the metal adsorbed on the outer wall of the magnetic separation roller (10) being fixedly connected to both sides of the inner wall of the magnetic separation roller (10).

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