Nonmetal waste and scrap screening device

Abstract

The invention belongs to the technical field of non-metal machining, and particularly relates to a non-metal waste and scrap screening device which comprises a screening box. One end of the top of the screening box communicates with and is fixedly connected with a feeding hopper. A pretreatment unit is arranged in the screening box and comprises two crushing rollers; the crushing rollers are rotationally connected to the screening box through first roller shafts; through cooperative use of a crushing roller and a demagnetizing rod, an output shaft of a first motor drives a first roller shaft to rotate, and two first gears are matched to drive the crushing roller to rotate reversely, so that the function of crushing waste materials is realized; the demagnetizing bar is electrified, crushed waste falls on the demagnetizing bar, the driving mechanism is started to drive the demagnetizing bar to rotate, so that metal materials in the falling waste are attracted, the waste falls on the sieve plate, and under the action of the vibrating mechanism, the waste is quickly screened through the sieve plate, and the function of pretreating the waste is achieved.

Description

Technical Field

[0001] This invention belongs to the field of non-metallic processing technology, specifically a non-metallic waste and debris screening device. Background Technology

[0002] Building materials are the various materials used in construction projects. Building materials can be divided into metallic materials and non-metallic materials. Non-metallic materials include wood, bamboo, stone, cement, concrete, bricks, tiles, ceramics, glass, engineering plastics, composite materials, etc. After the construction is completed, a large amount of solid building material waste is left on site, which needs to be recycled using waste recycling equipment.

[0003] A Chinese patent with publication number CN213855677U discloses an environmentally friendly construction waste recycling screening device, including a box, a secondary screen, and a primary screen. A base is fixedly installed below the box, and a discharge port is opened on the outer surface of the box. The secondary screen is installed inside the lower side of the box, and a lead screw is installed above the secondary screen. The primary screen is positioned above the secondary screen. A feed port is provided on the upper surface of the box, and a long rack is provided below the gear. A sliding groove is opened inside the upper side of the box. This environmentally friendly construction waste recycling screening device adopts a novel structural design, adding a baffle at the feed port. The baffle automatically opens when material is added and automatically closes when feeding stops, controlling dust dispersion and reducing environmental pollution without affecting feeding efficiency. Furthermore, the screen vibrates up and down during screening to accelerate the screening speed and discharge the screened material, preventing accumulation and affecting subsequent screening.

[0004] In current technologies, waste materials can usually be reused after screening. However, in construction, non-metallic materials are often used in conjunction with metallic materials such as nails and steel bars. While non-metallic waste can be separated from debris during screening, the metallic materials mixed in with the non-metallic materials are difficult to separate, thus affecting the reuse of non-metallic waste.

[0005] Therefore, the present invention provides a non-metallic waste and debris screening device. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: A non-metallic waste and debris screening device of the present invention includes a screening box; a feed hopper is fixedly connected to one end of the top of the screening box; a pretreatment unit is provided inside the screening box, the pretreatment unit includes two crushing rollers; the crushing rollers are rotatably connected to the screening box through a first roller shaft, both ends of the first roller shaft extend to the outside of the screening box, and a first gear is fixedly connected to one end of the first roller shaft, the two first gears meshing with each other; an L-shaped plate is fixedly connected to the outer wall of the screening box, a first motor is fixedly connected to the L-shaped plate, and the output shaft of the first motor is fixedly connected to the end of the first roller shaft away from the first gear; The pretreatment unit also includes a demagnetizing rod, which is located below the two crushing rollers. The demagnetizing rod is rotatably connected to the screening box via a rotating shaft. One end of the rotating shaft is provided with a driving mechanism for driving the demagnetizing rod to rotate. A screen plate is provided below the demagnetizing rod, and a vibration mechanism is provided below the screen plate. The vibration mechanism is connected to the driving mechanism.

[0008] Preferably, the vibration mechanism includes a cam block, which is rotatably connected to the screening box via a rotating rod. One end of the rotating rod extends to the outside of the screening box, and a second motor is fixedly connected to the outer wall of the screening box via a mounting plate. The output shaft of the second motor is fixedly connected to one end of the rotating rod.

[0009] Preferably, the drive mechanism includes a third wheel fixed to one end of the rotating shaft, a fourth wheel fixed to the outer side of the rotating rod, and a second belt sleeved between the third wheel and the fourth wheel.

[0010] Preferably, two fixing plates are fixedly connected to the inner side wall of the screening box, and springs are fixedly connected between the two fixing plates and the sieve plate.

[0011] Preferably, the screening box has a housing installed inside. One end of the screen plate is rotatably connected to the housing via a rotating shaft. A conveyor belt is rotatably connected inside the housing via a second roller shaft. One end of the conveyor belt is located below the screen plate, and the other end of the conveyor belt is located above the crushing roller. Multiple scrapers are uniformly fixed to the outer wall of the conveyor belt, and the scrapers are in contact with the inner wall of the housing.

[0012] Preferably, the bottom of the screening box is connected to a hopper, and the four corners of the hopper are respectively connected to support columns; both ends of the top of the screen plate are fixed to baffles, which are inclined; one end of the baffle is engaged with the shell.

[0013] Preferably, a rotating plate is rotatably connected to the sieve plate via a rolling shaft. The rotating plate is flush with the surface of the sieve plate. A third motor is fixedly connected to the side wall of the sieve plate, and the output shaft of the third motor is fixedly connected to the rolling shaft.

[0014] Preferably, a first roller is fixedly connected to one end of the first roller shaft, a second roller is fixedly connected to one end of the second roller shaft, and a first belt is sleeved between the first roller and the second roller.

[0015] Preferably, the bottom of the housing is rotatably connected to a rotating rod via a bearing, a dust collection hood is mounted on the rotating rod, the top of the screening box is provided with a dust collection box and a fan, the air outlet of the fan is connected and fixedly connected to the dust collection box, a dust collection pipe is connected and fixedly connected to the dust collection box, one end of the dust collection pipe is connected and fixedly connected to the dust collection hood, and a rotating mechanism is provided on the rotating rod for driving the rotating rod to rotate.

[0016] Preferably, the rotating mechanism includes a second gear fixed to the rotating rod, an electric push rod fixed to the bottom of the housing, a rack fixed to the output end of the electric push rod via a connecting plate, the rack meshing with the second gear, a sliding groove being provided at the bottom of the housing, and the top of the connecting plate sliding within the sliding groove.

[0017] The beneficial effects of this invention are as follows: 1. The non-metallic waste and debris screening device of the present invention utilizes the combined use of a crushing roller and a demagnetizing rod. The output shaft of a first motor drives a first roller shaft to rotate, which in turn drives the connected crushing roller and a first gear to rotate. The first gear drives another first gear to rotate in the opposite direction, which in turn drives the connected first roller shaft and the crushing roller to rotate in the opposite direction, thus achieving the function of crushing waste. By energizing the demagnetizing rod, the crushed waste falls onto it. Activating the drive mechanism causes the demagnetizing rod to rotate, attracting metal materials from the falling waste. The waste falls onto a screen plate, where it is rapidly screened under the action of a vibration mechanism. Small particles fall, while large particles roll off the screen plate onto a conveyor belt for secondary crushing and screening. This allows the screened waste to be directly reused, achieving the function of waste pretreatment.

[0018] 2. The non-metallic waste and debris screening device of the present invention, through the combined use of scrapers and rotating plates, allows small particles of waste on the screen plate to fall into the hopper during the rolling process, while larger particles fall into the housing. The rotation of the conveyor belt drives the scraper to rotate, scraping and conveying the waste in the housing upwards, and finally outputting it from the top of the conveyor belt, falling between the crushing rollers, facilitating secondary crushing of large particles of waste, and ultimately crushing all waste into particles of a set size. After screening, the metal material on the demagnetizing rod needs to be cleaned. By turning on the third motor, the output shaft of the third motor drives the rotating plate to rotate upwards. Then, the demagnetizing rod is de-energized, the metal material loses its magnetic attraction, and falls into the hopper through the gap between the rotating plate and the screen plate, thereby achieving the cleaning of the metal material.

[0019] 3. The non-metallic waste and debris screening device of the present invention, through the cooperation of a dust suction hood, a rack and pinion, and a second gear, activates a fan, which generates negative pressure at one end of the dust suction hood. This negative pressure adsorption absorbs impurities from the screening box, which are then ultimately drawn into the dust suction box through a suction pipe. During dust collection, an electric push rod is activated, its output end driving a connecting plate, which in turn drives a rack, which in turn drives a second gear, which in turn drives a rotating rod. This rotating rod then drives the dust suction hood to rotate, expanding the absorption range through the reciprocating rotation of the dust suction hood, thereby quickly absorbing dust from the screening box. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a first perspective view of the present invention; Figure 2 This is a second perspective view of the present invention; Figure 3 This is a sectional view of the present invention; Figure 4 This is a schematic diagram of the structure of the crushing roller and the first gear in this invention; Figure 5 This is a schematic diagram of the structure of the shell and sieve plate in this invention; Figure 6 This is a schematic diagram of the structure of the second gear and rack in this invention; Figure 7 This is a schematic diagram of the structure of the baffle and the rotating plate in this invention; In the diagram: 1. Screening box; 2. Feed hopper; 3. Crushing roller; 31. L-shaped plate; 32. First motor; 33. First gear; 34. First impeller; 35. First belt; 36. Second impeller; 4. Demagnetizing rod; 41. Cam block; 42. Third impeller; 43. Fourth impeller; 44. Second belt; 45. Second motor; 46. Screen plate; 461. Baffle; 462. Rotating plate; 463. Third motor; 47. Rotating rod; 48. Fixed plate; 49. Spring; 5. Housing; 51. Conveyor belt; 52. Scraper; 53. Dust hood; 54. Rotating rod; 55. Rack; 56. Electric push rod; 57. Dust collection box; 58. Dust collection pipe; 59. Fan; 510. Second gear; 6. Feed hopper. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments. Example

[0023] like Figures 1 to 7 As shown in the embodiment of the present invention, a non-metallic waste and debris screening device includes a screening box 1; a feed hopper 2 is fixedly connected to one end of the top of the screening box 1; a pretreatment unit is provided inside the screening box 1, the pretreatment unit including two crushing rollers 3; the crushing rollers 3 are rotatably connected to the screening box 1 through a first roller shaft, both ends of the first roller shaft extending to the outside of the screening box 1, and a first gear 33 is fixedly connected to one end of each first roller shaft, the two first gears 33 meshing with each other; a [missing information - likely a device name] is fixedly connected to the outer wall of the screening box 1. L-shaped plate 31, the L-shaped plate 31 is fixedly connected to a first motor 32, the output shaft of the first motor 32 is fixedly connected to the end of the first roller shaft away from the first gear 33; the pretreatment unit also includes a demagnetizing rod 4, the demagnetizing rod 4 is disposed below the two crushing rollers 3; the demagnetizing rod 4 is rotatably connected to the screening box 1 through a rotating shaft, one end of the rotating shaft is provided with a driving mechanism for driving the demagnetizing rod 4 to rotate; a screen plate 46 is provided below the demagnetizing rod 4, and a vibration mechanism is provided below the screen plate 46, the vibration mechanism is connected to the driving mechanism.

[0024] Building materials are the various materials used in construction projects. They can be divided into metallic and non-metallic materials. Non-metallic materials include wood, bamboo, stone, cement, concrete, bricks, tiles, ceramics, glass, engineering plastics, and composite materials. After construction is completed, a large amount of waste such as cement and lime is left on site, requiring the use of waste recycling equipment to collect the solid waste. Currently, in existing technologies, waste materials can usually be reused after screening. However, during construction, non-metallic materials are often used in conjunction with metallic materials such as nails and reinforcing bars. While the non-metallic waste can be separated from debris during screening, the metallic materials mixed in with the non-metallic materials are difficult to separate, thus affecting the reuse of the non-metallic waste.

[0025] Based on this, when the pretreatment unit provided in this embodiment is in use, waste materials such as cement and lime are input into the screening box 1 through the feed hopper 2. Then, by turning on the first motor 32, the output shaft of the first motor 32 drives the first roller shaft to rotate. The first roller shaft drives the connected crushing roller 3 and the first gear 33 to rotate. The first gear 33 drives another first gear 33 to rotate in the opposite direction. The first gear 33 drives the connected first roller shaft and the crushing roller 3 to rotate in the opposite direction, thereby realizing the function of crushing the waste materials. By energizing the demagnetizing rod 4, the crushed waste falls onto the demagnetizing rod 4. By activating the drive mechanism, the demagnetizing rod 4 rotates, thereby attracting the metal material in the falling waste. The waste falls onto the screen plate 46, and under the action of the vibration mechanism, it is quickly screened through the screen plate 46. Small particles of waste fall down, while large particles of waste roll off the screen plate 46 onto the conveyor belt 51 for secondary crushing and screening. This allows the screened waste to be directly reused, realizing the function of waste pretreatment. Example

[0026] like Figure 6 As shown, the vibration mechanism includes a cam block 41, which is rotatably connected to the screening box 1 via a rotating rod 47. One end of the rotating rod 47 extends to the outside of the screening box 1. A second motor 45 is fixedly connected to the outer wall of the screening box 1 via a mounting plate. The output shaft of the second motor 45 is fixedly connected to one end of the rotating rod 47. Two fixing plates 48 are fixedly connected to the inner side wall of the screening box 1. Springs 49 are fixedly connected between the two fixing plates 48 and the sieve plate 46.

[0027] In use, the vibration mechanism provided in this embodiment works by turning on the second motor 45, which drives the rotating rod 47 to rotate via the output shaft of the second motor 45. The rotating rod 47 then drives the cam block 41 to rotate. The continuous rotation of the cam block 41 periodically lifts the screen plate 46 upward, causing the screen plate 46 to vibrate. Under the action of the spring 49, the screen plate 46 can be quickly reset, and the vibration process also protects the screen plate 46, thus achieving the function of rapid screening of waste materials.

[0028] like Figure 1 and Figure 5 As shown, the drive mechanism includes a third wheel 42 fixed to one end of the rotating shaft, a fourth wheel 43 fixed to the outer side of the rotating rod 47, and a second belt 44 sleeved between the third wheel 42 and the fourth wheel 43.

[0029] The drive mechanism provided in this embodiment is used to achieve synchronous vibration and demagnetization. During the rotation of the second motor 45 driving the rotating rod 47, the rotating rod 47 drives the fourth rotating wheel 43 to rotate, the fourth rotating wheel 43 drives the second belt 44 to rotate, and the second belt 44 drives the rotating shaft of the demagnetizing rod 4 to rotate, thereby driving the demagnetizing rod 4 to rotate. This facilitates the falling of metal materials to different positions and prevents them from accumulating together. In addition, during the rotation, it is easy for waste materials on the demagnetizing rod 4 to fall off, thereby achieving continuous vibration and demagnetization. Example

[0030] like Figure 3As shown, a housing 5 is installed inside the screening box 1. One end of the screen plate 46 is rotatably connected to the housing 5 via a rotating shaft. A conveyor belt 51 is rotatably connected inside the housing 5 via a second roller shaft. One end of the conveyor belt 51 is located below the screen plate 46, and the other end of the conveyor belt 51 is located above the crushing roller 3. Multiple scrapers 52 are uniformly fixed to the outer wall of the conveyor belt 51, and the scrapers 52 are in contact with the inner wall of the housing 5.

[0031] In this embodiment, when the conveyor belt 51 and scraper 52 are in use, large particles of waste on the screen plate 46 roll into the housing 5. At this time, the rotation of the conveyor belt 51 drives the scraper 52 to rotate, and the scraper 52 scrapes the waste in the housing 5 upward and conveys it. Finally, it is output from the top of the conveyor belt 51 and falls between the crushing rollers 3, which facilitates the secondary crushing of large particles of waste and finally crushes the waste into particles of a set size.

[0032] like Figure 3 As shown, the bottom of the screening box 1 is connected to a hopper 6, and the four corners of the hopper 6 are respectively connected to support columns; both ends of the top of the screen plate 46 are fixed with baffles 461, and the baffles 461 are inclined; one end of the baffles 461 is engaged with the shell 5.

[0033] When the baffle 461 provided in this embodiment is in use, the waste on the screen plate 46 rolls down, small particles of waste fall into the hopper 6, and large particles of waste roll along the screen plate 46 and the baffle 461 into the housing 5. The baffle 461 is provided to prevent large particles of waste from overflowing from the edge and falling into the hopper 6.

[0034] like Figure 7 As shown, a rotating plate 462 is rotatably connected to the sieve plate 46 via a rolling shaft. The rotating plate 462 is flush with the surface of the sieve plate 46. A third motor 463 is fixedly connected to the side wall of the sieve plate 46, and the output shaft of the third motor 463 is fixedly connected to the rolling shaft.

[0035] In this embodiment, the rotating plate 462 needs to be rotated to be flush with the screen plate 46 during the screening process to facilitate the screening of waste materials. After screening, the metal material on the demagnetizing rod 4 needs to be cleaned. By turning on the third motor 463, the output shaft of the third motor 463 drives the rotating plate 462 to rotate. The rotating plate 462 rotates upward, and then the demagnetizing rod 4 is de-energized. The metal material loses its magnetic attraction and finally falls onto the screen plate 46. Because the rotating plate 462 rotates upward, it not only prevents the metal material from continuing to roll down, but also creates a gap with the screen plate 46. The metal material falls directly into the discharge hopper 6, thereby achieving the cleaning of the metal material.

[0036] like Figure 4As shown, a first roller 34 is fixedly connected to one end of the first roller shaft, and a second roller 36 is fixedly connected to one end of the second roller shaft. A first belt 35 is sleeved between the first roller 34 and the second roller 36.

[0037] In this embodiment, when the first roller 34 and the second roller 36 are in use, the first roller shaft rotates, which drives the first roller 34 to rotate, which in turn drives the first belt 35 to rotate, which in turn drives the second roller 36 to rotate, which in turn drives the second roller shaft to rotate, which in turn drives the conveyor belt 51 to convey materials, thereby achieving synchronous crushing and material conveying. Example

[0038] like Figure 4 and Figure 6 As shown, the bottom of the housing 5 is rotatably connected to a rotating rod 54 via a bearing. A dust collection hood 53 is mounted on the rotating rod 54. The top of the screening box 1 is provided with a dust collection box 57 and a fan 59. The air outlet of the fan 59 is connected and fixedly connected to the dust collection box 57. A dust collection pipe 58 is connected and fixedly connected to the dust collection box 57. One end of the dust collection pipe 58 is connected and fixedly connected to the dust collection hood 53. A rotating mechanism is provided on the rotating rod 54 for driving the rotating rod 54 to rotate.

[0039] The dust hood 53 provided in this embodiment is used to absorb dust in the screening box 1. During crushing and screening, a large amount of dust is generated. If it is not removed in time, the dust will fall on some transmission parts of the device, affecting the operation of the transmission parts and easily causing wear. Therefore, during crushing and screening, the fan 59 needs to be turned on. The fan 59 generates negative pressure at one end of the dust hood 53. The impurities in the screening box 1 are absorbed by the negative pressure adsorption and finally absorbed into the dust collection box 57 through the dust collection pipe 58. During dust collection, the rotating mechanism is turned on to drive the rotation of the dust hood 53, thereby expanding the dust collection area of ​​the dust hood 53.

[0040] like Figure 6 As shown, the rotating mechanism includes a second gear 510 fixedly connected to the rotating rod 54, an electric push rod 56 fixedly connected to the bottom of the housing 5, and a rack 55 fixedly connected to the output end of the electric push rod 56 through a connecting plate. The rack 55 meshes with the second gear 510. A sliding groove is provided at the bottom of the housing 5, and the top of the connecting plate slides in the sliding groove.

[0041] In use, the rotating mechanism provided in this embodiment works by activating the electric push rod 56, which in turn drives the connecting plate to move. The connecting plate then drives the rack 55 to move, which in turn drives the second gear 510 to rotate. The second gear 510 then drives the rotating rod 54 to rotate, which in turn drives the dust collection hood 53 to rotate. The reciprocating rotation of the dust collection hood 53 expands the absorption range, thereby quickly absorbing the dust in the screening box 1. During the movement, the connecting plate slides within the groove, thus limiting the movement of the connecting plate and the rack 55 in the horizontal direction.

[0042] Working principle: Waste materials such as cement and lime are fed into the screening box 1 through the feed hopper 2. Then, the first motor 32 is turned on, and the output shaft of the first motor 32 drives the first roller shaft to rotate. The first roller shaft drives the connected crushing roller 3 and the first gear 33 to rotate. The first gear 33 drives another first gear 33 to rotate in the opposite direction. This first gear 33 drives the connected first roller shaft and the crushing roller 3 to rotate in the opposite direction, thereby realizing the function of crushing the waste material. When the demagnetizing rod 4 is energized, the crushed waste falls onto the demagnetizing rod 4. When the drive mechanism is turned on, the demagnetizing rod 4 rotates, thereby attracting the metal materials in the falling waste. The waste falls onto the screen plate 46. Under the action of the vibration mechanism, it is quickly screened through the screen plate 46. Small particles of waste fall down, and large particles of waste roll off the screen plate 46 onto the conveyor belt 51 for secondary crushing and screening. Thus, the screened waste can be directly used for secondary use, realizing the function of waste pretreatment.

[0043] Large waste particles on screen plate 46 roll into the housing 5. At this time, the rotation of conveyor belt 51 drives scraper 52 to rotate, scraping and conveying the waste particles upwards from the top of conveyor belt 51. The waste particles finally exit between crushing rollers 3, facilitating secondary crushing of the large particles and ultimately breaking them into particles of a set size. During the rolling process, small waste particles fall into the hopper 6, while large waste particles roll along screen plate 46 and baffle 461 into the housing 5. The baffle 461 prevents large waste particles from overflowing from the edge and falling into the hopper 6. During the screening process, the rotating plate 462 needs to be rotated to be flush with the screen plate 46 to facilitate the screening of waste materials. After screening, the metal material on the demagnetizing rod 4 needs to be cleaned. By turning on the third motor 463, the output shaft of the third motor 463 drives the rotating plate 462 to rotate. The rotating plate 462 rotates upward, and then the demagnetizing rod 4 is de-energized. The metal material loses its magnetic attraction and finally falls onto the screen plate 46. Because the rotating plate 462 rotates upward, it not only prevents the metal material from continuing to roll down, but also creates a gap with the screen plate 46. The metal material falls directly into the discharge hopper 6, thereby achieving the cleaning of the metal material.

[0044] During crushing and screening, a large amount of dust is generated. If it is not removed in time, the dust will fall on some transmission components of the device, affecting the operation of the transmission components and easily causing wear. Therefore, during crushing and screening, the blower 59 needs to be turned on. The blower 59 generates negative pressure at one end of the dust suction hood 53. The impurities in the screening box 1 are absorbed by the negative pressure adsorption and finally absorbed into the dust suction box 57 through the dust suction pipe 58. During dust suction, the electric push rod 56 is turned on. The output end of the electric push rod 56 drives the connecting plate to move. The connecting plate drives the rack 55 to move. The rack 55 drives the second gear 510 to rotate. The second gear 510 drives the rotating rod 54 to rotate. The rotating rod 54 drives the dust suction hood 53 to rotate. The reciprocating rotation of the dust suction hood 53 expands the absorption range, thereby quickly absorbing the dust in the screening box 1.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A non-metallic waste and debris screening device, comprising a screening box (1); a feed hopper (2) is fixedly connected to the top end of the screening box (1); a pretreatment unit is provided inside the screening box (1), characterized in that: The pretreatment unit includes two crushing rollers (3); each crushing roller (3) is rotatably connected to the screening box (1) via a first roller shaft, both ends of which extend to the outside of the screening box (1), and one end of each first roller shaft is fixedly connected to a first gear (33), and the two first gears (33) mesh with each other; an L-shaped plate (31) is fixedly connected to the outer wall of the screening box (1), and a first motor (32) is fixedly connected to the L-shaped plate (31), and the output shaft of the first motor (32) is fixedly connected to the end of the first roller shaft away from the first gear (33); The pretreatment unit also includes a demagnetizing rod (4), which is located below the two crushing rollers (3); the demagnetizing rod (4) is rotatably connected to the screening box (1) via a rotating shaft, and a driving mechanism is provided at one end of the rotating shaft to drive the demagnetizing rod (4) to rotate; a screen plate (46) is provided below the demagnetizing rod (4), and a vibration mechanism is provided below the screen plate (46), which is connected to the driving mechanism.

2. The non-metallic waste and debris screening device according to claim 1, characterized in that: The vibration mechanism includes a cam block (41), which is rotatably connected to the screening box (1) via a rotating rod (47). One end of the rotating rod (47) extends to the outside of the screening box (1). A second motor (45) is fixed to the outer wall of the screening box (1) via a mounting plate. The output shaft of the second motor (45) is fixed to one end of the rotating rod (47).

3. The non-metallic waste and debris screening device according to claim 2, characterized in that: The drive mechanism includes a third wheel (42) fixed to one end of the shaft, a fourth wheel (43) fixed to the outer side of the rotating rod (47), and a second belt (44) sleeved between the third wheel (42) and the fourth wheel (43).

4. The non-metallic waste and debris screening device according to claim 3, characterized in that: Two fixing plates (48) are fixedly connected to the inner side wall of the screening box (1), and springs (49) are fixedly connected between the two fixing plates (48) and the sieve plate (46).

5. The non-metallic waste and debris screening device according to claim 4, characterized in that: The screening box (1) is equipped with a housing (5). One end of the screen plate (46) is rotatably connected to the housing (5) via a rotating shaft. A conveyor belt (51) is rotatably connected inside the housing (5) via a second roller shaft. One end of the conveyor belt (51) is located below the screen plate (46), and the other end of the conveyor belt (51) is located above the crushing roller (3). Multiple scrapers (52) are uniformly fixed on the outer wall of the conveyor belt (51), and the scrapers (52) are in contact with the inner wall of the housing (5).

6. The non-metallic waste and debris screening device according to claim 5, characterized in that: The bottom of the screening box (1) is connected to a hopper (6), and the four corners of the hopper (6) are respectively connected to support columns; both ends of the top of the screen plate (46) are connected to baffles (461), and the baffles (461) are inclined; one end of the baffle (461) is engaged with the shell (5).

7. The non-metallic waste and debris screening device according to claim 6, characterized in that: A rotating plate (462) is rotatably connected to the sieve plate (46) via a rolling shaft. The rotating plate (462) is flush with the surface of the sieve plate (46). A third motor (463) is fixedly connected to the side wall of the sieve plate (46), and the output shaft of the third motor (463) is fixedly connected to the rolling shaft.

8. The non-metallic waste and debris screening device according to claim 7, characterized in that: A first roller (34) is fixedly connected to one end of the first roller shaft, and a second roller (36) is fixedly connected to one end of the second roller shaft. A first belt (35) is sleeved between the first roller (34) and the second roller (36).

9. A non-metallic waste and debris screening device according to claim 8, characterized in that: The bottom of the housing (5) is rotatably connected to a rotating rod (54) via a bearing. A dust collection hood (53) is installed on the rotating rod (54). The top of the screening box (1) is provided with a dust collection box (57) and a fan (59). The air outlet of the fan (59) is connected to and fixedly connected to the dust collection box (57). A dust collection pipe (58) is connected to and fixedly connected to the dust collection box (57). One end of the dust collection pipe (58) is connected to and fixedly connected to the dust collection hood (53). A rotating mechanism is provided on the rotating rod (54) for driving the rotating rod (54) to rotate.

10. A non-metallic waste and debris screening device according to claim 9, characterized in that: The rotating mechanism includes a second gear (510) fixed to the rotating rod (54), an electric push rod (56) fixed to the bottom of the housing (5), a rack (55) fixed to the output end of the electric push rod (56) through a connecting plate, the rack (55) meshing with the second gear (510), a sliding groove is provided at the bottom of the housing (5), and the top of the connecting plate slides in the sliding groove.

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