A building material and stone sorting and crushing screen and use method thereof

Abstract

The invention belongs to the field of sorting and crushing screens, in particular to a building material and stone sorting and crushing screen. The existing stones will generate more dust when they are crushed, and the existing sorting crushers have poor dust removal effects when in use, which affects the on-site environment; outdoor plastic bags will be blown onto the stones by the wind, and traditional devices cannot remove plastic bags and other items, affecting the use of the stones. The following scheme is now proposed, which includes a frame, and a conveying roller and a magnetic roller are rotatably connected between the two sides of the frame. The invention also proposes a method for using a building material and stone sorting and crushing screen, including the following steps: S1: When in use, start a reducer, a conveying motor and an exhaust fan, and then put the raw materials into the crushing box. In the present invention, the exhaust fan can be used to draw the dust generated when the stone is crushed to one side of the nozzle, so that the dust reduction effect is better, and at the same time the raw materials can be more dispersed, which is convenient for the magnetic roller to sort the raw materials.

Description

Technical Field

[0001] The present invention relates to the technical field of sorting and crushing screens, and in particular to a building material and stone sorting and crushing screen and a use method thereof. Background Art

[0002] As the name implies, the sorting and crushing screen is a device that can perform crushing and screening. In construction projects, it is usually necessary to sort stones. When processing stones, when building materials are mixed in the stones, it is necessary to use a sorting and crushing screen to process the stones, so as to remove the building materials and prevent the subsequent use of the stones from being affected. However, the existing sorting and crushing screens still have the following problems when used:

[0003] Stones will generate a lot of dust when they are crushed. The existing sorting crushers have poor dust removal effect when in use, which affects the on-site environment.

[0004] Plastic bags outdoors will be blown onto the stones by the wind, and traditional devices cannot remove plastic bags and other items, affecting the use of the stones.

[0005] In view of the above problems, the present invention document proposes a building material and stone sorting and crushing screen and a method of using the same. Summary of the invention

[0006] The present invention provides a building material and stone sorting and crushing screen and a method for using the same, which solves the problems in the prior art that more dust is generated when stones are crushed, the existing sorting crusher has poor dust removal effect when in use, and affects the on-site environment; outdoor plastic bags are blown onto the stones by the wind, and traditional devices cannot remove items such as plastic bags, which affects the use of the stones.

[0007] The present invention provides the following technical solutions:

[0008] A building material and stone sorting and crushing screen, comprising:

[0009] A frame, wherein a conveying roller and a magnetic roller are rotatably connected between the two sides of the frame, a conveying belt is transmission-connected between the conveying roller and the magnetic roller, a conveying motor is fixedly connected to one side of the frame, and an output shaft of the conveying motor is fixed to one end of the magnetic roller;

[0010] A crushing box is fixedly connected to the top of the frame, and a crushing assembly for crushing stones is arranged in the crushing box. A first dust reduction mechanism for dust reduction is arranged on one side of the crushing box. The first dust reduction mechanism includes a water distribution pipe fixedly connected to one side of the crushing box, and a plurality of nozzles are fixedly connected to one side of the water distribution pipe. The water outlet end of the nozzle faces the discharge end at the bottom of the crushing box, and one end of the water distribution pipe is fixedly connected to a main pipe for water supply;

[0011] An auxiliary dust reduction mechanism, which is arranged on one side of the crushing box and is used in conjunction with the first dust reduction mechanism;

[0012] A cleaning mechanism, which is arranged on the top of the frame to clean the plastic products;

[0013] A lifting mechanism is arranged between two sides of the frame to lift the middle part of the conveyor belt.

[0014] Furthermore, the lifting mechanism includes a U-shaped frame and two driving rods. The U-shaped frame rotates and passes through two sides of the frame. The circumference of the U-shaped frame is fixedly connected to a top frame. The top frame is located in the conveyor belt and contacts the top inner wall of the conveyor belt. The circumference of the U-shaped frame is fixedly connected to two torsion springs, which are respectively fixed to the inner walls on both sides of the frame. The driving rods are respectively fixedly connected to the two ends of the conveyor roller and used in conjunction with the two ends of the U-shaped frame.

[0015] Furthermore, both ends of the driving rod are provided with mounting openings, and driving wheels are rotatably connected in the mounting openings.

[0016] Furthermore, the auxiliary dust reduction mechanism includes a mounting plate fixedly connected to one side of the crushing box, a filter box and an exhaust hood, the upper surface of the mounting plate is fixedly connected to an exhaust fan, the exhaust end of the exhaust fan is fixedly connected to the top of the filter box, two springs are fixedly connected to the inner walls on both sides of the filter box, a filter screen is fixedly connected between the bottoms of the multiple springs, the bottom of the filter box is fixedly connected to the exhaust hood, the water distribution pipe and the nozzle are located in the exhaust hood, and the main pipe passes through the exhaust hood.

[0017] Furthermore, a bending frame is fixedly connected to the bottom of the filter screen, and the bending frame passes through the filter box. Both ends of the bending frame are respectively located above two driving rods. A second collecting box is inserted into one side of the filter box, and the second collecting box is located below the filter screen.

[0018] Furthermore, one side of the second collecting box and one side of the filter box are both fixedly connected with mounting seats, a threaded rod is rotatably connected in one of the mounting seats, and a nut is threadedly connected to the circumference of the threaded rod.

[0019] Furthermore, the crushing assembly includes two crushing rollers and two reducers. The two crushing rollers are rotatably connected between the inner walls on both sides of the crushing box. The two reducers are fixedly connected to the outer wall on one side of the crushing box. The output shafts of the two reducers are respectively fixed to the two crushing rollers, and the two crushing rollers rotate in opposite directions.

[0020] Furthermore, the cleaning mechanism includes a mounting shaft that rotates and passes through both sides of the frame and two pairs of transmission wheels. A plurality of hook knives are fixedly connected to the circumference of the mounting shaft. The top of the frame is fixedly connected to a material guide plate used in conjunction with the hook knives. A plurality of avoidance openings used in conjunction with the hook knives are provided on one side of the material guide plate. A first collection box for collecting plastic products is fixedly connected to the top of the frame. The two pairs of transmission wheels are respectively fixedly connected to the mounting shaft and the two ends of the magnetic roller, and the two transmission wheels on the same side are transmission connected.

[0021] Furthermore, a plurality of support rods are rotatably connected between the inner walls on both sides of the frame, and a scraper is fixedly connected to the bottom of the frame, and the scraper contacts the bottom of the conveyor belt.

[0022] The present invention also provides a method for using a building material and stone sorting and crushing screen, comprising the following steps:

[0023] S1: When in use, start the reducer, conveying motor and exhaust fan, then put the raw materials into the crushing box, the reducer drives the two crushing rollers to rotate, and the crushing rollers are used to crush the raw materials, and the crushed raw materials fall on the surface of the conveyor belt;

[0024] S2: The conveying motor drives the magnetic roller to rotate, and the conveyor belt rotates with the cooperation of the conveying roller to convey the raw materials. The main pipe is connected to the external water pipe. The tap water for dust reduction passes through the main pipe and the water distribution pipe, and then sprayed out through the nozzle, thereby reducing the dust generated when the crushed stone falls and improving the on-site environment;

[0025] S3: After the exhaust fan is started, the dust is sucked to one side of the nozzle through the filter box and the exhaust hood to improve the cleaning effect of the nozzle;

[0026] S4: When the conveying roller rotates, the driving rod is driven to rotate. After the driving rod contacts the U-shaped frame, the U-shaped frame is pushed downward. The U-shaped frame rotates to make the top frame away from the conveyor belt. Then the U-shaped frame and the top frame are reset under the action of the torsion spring, thereby lifting the conveyor belt and flattening the raw materials to prevent the raw materials from piling up. Then the raw materials are conveyed at one end of the conveyor belt, and the building materials that can be absorbed by the magnetic roller are separated from the ordinary raw materials.

[0027] S5: When the driving rod rotates, it will also push the bending frame upward, and the bending frame drives the filter to move upward. After the driving rod is out of contact with the bending frame, the filter is reset under the push of the spring to prevent the filter from being blocked. The filter is set in an inclined state, and the extracted dust can be shaken into the second collection box during the shaking process, which is convenient for people to handle;

[0028] S6: When the magnetic roller rotates, the driving wheel drives the mounting shaft to rotate, and the mounting shaft drives the hook knife to rotate. The hook knife hooks up the plastic product, and then cuts the plastic part after passing through the avoidance opening. The plastic part then falls into the first collection box along the inclined material guide plate.

[0029] It is to be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the invention.

[0030] In the present invention, by using the first dust reduction mechanism and the auxiliary dust reduction mechanism in coordination, the dust generated when the stone is crushed can be sucked to one side of the nozzle by the exhaust fan, and the purpose of dust reduction is achieved by using the water sprayed from the nozzle, and the dust reduction effect is better.

[0031] In the present invention, the filter screen can be moved up and down, so that the dust passing through the nozzle can also be filtered by the filter screen, and then the dust falls down during the shaking of the filter screen, thereby preventing the filter screen from being blocked, reducing people's cleaning work, and improving the continuous working time of the device;

[0032] In the present invention, the conveyor belt can be shaken when conveying materials, so that after the raw materials fall on the conveyor belt, the conveyor belt can be lifted up by using the top frame, U-shaped frame and torsion spring, so that the raw materials are more dispersed, which is convenient for the magnetic roller to sort the raw materials;

[0033] In the present invention, by installing the mounting shaft and the cutter on the top of the frame, the cutter can be used to roll up the plastic products in the raw material, and then cut them and enter the first collection box along the guide plate, thereby improving the cleanliness of the stone;

[0034] In the present invention, the dust generated when the stone is crushed can be sucked to one side of the nozzle by the exhaust fan, and the purpose of dust reduction can be achieved by the water sprayed from the nozzle, and the dust reduction effect is better. At the same time, the conveyor belt can be shaken when conveying the material, so that after the raw materials fall on the conveyor belt, the conveyor belt can be lifted up by the top frame, U-shaped frame and torsion spring, so that the raw materials are more dispersed, which is convenient for the magnetic roller to sort the raw materials. The cutter can also be used to roll up the plastic products in the raw materials, and then cut them, and enter the first collection box along the guide plate, so as to improve the cleanliness of the stone. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of the three-dimensional structure of a building material and stone sorting and crushing screen provided by an embodiment of the present invention from a first viewing angle;

[0036] Figure 2 A schematic diagram of the three-dimensional structure of a building material and stone sorting and crushing screen provided by an embodiment of the present invention from a second viewing angle;

[0037] Figure 3A schematic diagram of a cross-sectional structure of a frame of a building material and stone sorting and crushing screen provided by an embodiment of the present invention;

[0038] Figure 4 A schematic cross-sectional view of a crushing box of a building material and stone separation crushing screen provided by an embodiment of the present invention;

[0039] Figure 5 A schematic diagram of the structure of a cleaning mechanism for a building material and stone sorting and crushing screen provided by an embodiment of the present invention;

[0040] Figure 6 A schematic diagram of the structure of a first dust reduction mechanism of a building material and stone sorting and crushing screen provided by an embodiment of the present invention;

[0041] Figure 7 A schematic diagram of the structure of an auxiliary dust reduction mechanism for a building material and stone sorting and crushing screen provided by an embodiment of the present invention;

[0042] Figure 8 A building material and stone separation and crushing screen provided by an embodiment of the present invention Figure 7 Schematic diagram of the enlarged structure of point A.

[0043] Reference numerals:

[0044] 1. Frame; 2. Cleaning mechanism; 3. Crushing box; 4. First dust reduction mechanism; 5. Auxiliary dust reduction mechanism; 6. Conveying roller; 7. Magnetic roller; 8. Conveying belt; 9. U-shaped frame; 10. Torsion spring; 11. Top frame; 12. Scraper; 13. Driving rod; 14. Support rod; 15. Crushing roller; 16. Speed ​​reducer; 17. Mounting shaft; 18. Hook knife; 19. Transmission wheel; 20. Guide plate; 21. Avoidance port; 22. First collecting box; 23. Water distribution pipe; 24. Nozzle; 25. Main pipe; 26. Mounting plate; 27. Exhaust fan; 28. Filter box; 29. ​​Filter; 30. Spring; 31. Bending frame; 32. Second collecting box; 33. Exhaust hood; 34. Mounting seat; 35. Threaded rod; 36. Nut. Implementation

[0045] The embodiments of the present invention are described below in conjunction with the accompanying drawings in the embodiments of the present invention. Example

[0046] Reference Figure 1-Figure 8A building material and stone sorting and crushing screen comprises: a frame 1, a conveying roller 6 and a magnetic roller 7 are rotatably connected between the two sides of the frame 1, the magnetic roller 7 is a prior art and is used to remove iron-based building materials, a conveying belt 8 is transmission-connected between the conveying roller 6 and the magnetic roller 7, a conveying motor is fixedly connected to one side of the frame 1, the output shaft of the conveying motor is fixed to one end of the magnetic roller 7, the conveying motor is started, the conveying motor drives the magnetic roller 7 to rotate, and the conveying belt 8 rotates with the cooperation of the conveying roller 6 to convey the raw materials;

[0047] A crushing box 3 is fixedly connected to the top of the frame 1. A crushing assembly for crushing stones is arranged in the crushing box 3. A first dust reduction mechanism 4 for dust reduction is arranged on one side of the crushing box 3. The first dust reduction mechanism 4 includes a water distribution pipe 23 fixedly connected to one side of the crushing box 3. A plurality of nozzles 24 are fixedly connected to one side of the water distribution pipe 23. The water outlet end of the nozzle 24 faces the discharge end at the bottom of the crushing box 3. A main pipe 25 for water supply is fixedly connected to one end of the water distribution pipe 23. The main pipe 25 is connected to an external water pipe. Tap water for dust reduction passes through the main pipe 25 and the water distribution pipe 23, and then is sprayed out through the nozzle 24, thereby reducing dust generated when the crushed stones fall.

[0048] Auxiliary dust reduction mechanism 5, the auxiliary dust reduction mechanism 5 is arranged on one side of the crushing box 3 and is used in conjunction with the first dust reduction mechanism 4;

[0049] A cleaning mechanism 2, which is arranged on the top of the frame 1 to clean the plastic products;

[0050] The lifting mechanism is arranged between the two sides of the frame 1 to lift the middle part of the conveyor belt 8.

[0051] Reference Figure 3 The lifting mechanism includes a U-shaped frame 9 and two driving rods 13. The U-shaped frame 9 rotates and runs through the two sides of the frame 1. The circumference of the U-shaped frame 9 is fixedly connected with a top frame 11. The top frame 11 is located in the conveyor belt 8 and contacts the top inner wall of the conveyor belt 8. The circumference of the U-shaped frame 9 is fixedly connected with two torsion springs 10. The two torsion springs 10 are respectively fixed to the inner walls of the two sides of the frame 1. The driving rods 13 are respectively fixedly connected to the two ends of the conveyor roller 6 and used in conjunction with the two ends of the U-shaped frame 9. After the driving rod 13 contacts the U-shaped frame 9, the U-shaped frame 9 is pushed downward, and the U-shaped frame 9 rotates to make the top frame 11 away from the conveyor belt 8. Then the U-shaped frame 9 and the top frame 11 are reset under the action of the torsion spring 10, thereby lifting the conveyor belt 8 and shaking the raw materials flat. Example

[0052] Reference Figure 1-Figure 8 , a building material and stone sorting and crushing screen, comprising:

[0053] A frame 1, a conveying roller 6 and a magnetic roller 7 are rotatably connected between the two sides of the frame 1, the magnetic roller 7 is a prior art, and is used to remove iron-type building materials, a conveying belt 8 is drivingly connected between the conveying roller 6 and the magnetic roller 7, a conveying motor is fixedly connected to one side of the frame 1, and the output shaft of the conveying motor is fixed to one end of the magnetic roller 7, the conveying motor is started, the conveying motor drives the magnetic roller 7 to rotate, and the conveying belt 8 rotates with the cooperation of the conveying roller 6 to convey the raw materials;

[0054] A crushing box 3 is fixedly connected to the top of the frame 1, and a crushing assembly for crushing stones is arranged in the crushing box 3. A first dust reduction mechanism 4 for dust reduction is arranged on one side of the crushing box 3. The first dust reduction mechanism 4 includes a water distribution pipe 23 fixedly connected to one side of the crushing box 3, and a plurality of nozzles 24 are fixedly connected to one side of the water distribution pipe 23. The water outlet end of the nozzle 24 faces the discharge end at the bottom of the crushing box 3. One end of the water distribution pipe 23 is fixedly connected to a main pipe 25 for water supply, and the main pipe 25 is connected to an external water pipe. The tap water for dust reduction passes through the main pipe 25 and the water distribution pipe 23, and then is sprayed out through the nozzle 24, thereby reducing the dust generated when the crushed stones fall. A plurality of support rods 14 are rotatably connected between the inner walls on both sides of the frame 1. The support rods 14 increase the supporting force of the conveyor belt 8 to prevent it from stretching. A scraper 12 is fixedly connected to the bottom of the frame 1. The scraper 12 contacts the bottom of the conveyor belt 8, and the scraper 12 is used to scrape the mud residue on the conveyor belt 8.

[0055] Auxiliary dust reduction mechanism 5, the auxiliary dust reduction mechanism 5 is arranged on one side of the crushing box 3 and is used in conjunction with the first dust reduction mechanism 4;

[0056] A cleaning mechanism 2, which is arranged on the top of the frame 1 to clean the plastic products;

[0057] The lifting mechanism is arranged between the two sides of the frame 1 to lift the middle part of the conveyor belt 8.

[0058] Reference Figure 3 The lifting mechanism includes a U-shaped frame 9 and two driving rods 13. The U-shaped frame 9 rotates and runs through the two sides of the frame 1. The circumference of the U-shaped frame 9 is fixedly connected with a top frame 11. The top frame 11 is located in the conveyor belt 8 and contacts the top inner wall of the conveyor belt 8. The circumference of the U-shaped frame 9 is fixedly connected with two torsion springs 10. The two torsion springs 10 are respectively fixed to the inner walls of the two sides of the frame 1. The driving rod 13 is respectively fixedly connected to the two ends of the conveyor roller 6 and used in conjunction with the two ends of the U-shaped frame 9. After the driving rod 13 contacts the U-shaped frame 9, the U-shaped frame 9 is pushed downward, and the U-shaped frame 9 rotates to make the top frame 11 away from the conveyor belt 8. Subsequently, the U-shaped frame 9 and the top frame 11 are reset under the action of the torsion spring 10, thereby lifting the conveyor belt 8 and shaking the raw materials flat. Both ends of the driving rod 13 are provided with mounting openings, and the mounting openings are rotatably connected with driving wheels.

[0059] Reference Figure 7 The auxiliary dust reduction mechanism 5 includes a mounting plate 26, a filter box 28 and an exhaust hood 33 fixedly connected to one side of the crushing box 3. The upper surface of the mounting plate 26 is fixedly connected with an exhaust fan 27. The exhaust end of the exhaust fan 27 is fixedly connected to the top of the filter box 28. Two springs 30 are fixedly connected to the inner walls on both sides of the filter box 28. A filter screen 29 is fixedly connected between the bottoms of the multiple springs 30. The bottom of the filter box 28 is fixedly connected to the exhaust hood 33. The water distribution pipe 23 and the nozzle 24 are located in the exhaust hood 33. The main pipe 25 passes through the exhaust hood 33. After the exhaust fan 27 is started, the dust is sucked to one side of the nozzle 24 through the filter box 28 and the exhaust hood 33, thereby improving the cleaning effect of the nozzle 24.

[0060] Reference Figure 7 The bottom of the filter 29 is fixedly connected with a bending frame 31, which passes through the filter box 28. The two ends of the bending frame 31 are respectively located above the two driving rods 13. A second collecting box 32 is inserted into one side of the filter box 28. The second collecting box 32 is located below the filter 29. When the driving rod 13 rotates, the bending frame 31 will be lifted up, and the bending frame 31 will drive the filter 29 to move upward. After that, after the driving rod 13 is out of contact with the bending frame 31, the filter 29 is reset under the push of the spring 30, thereby preventing the filter 29 from being blocked.

[0061] Reference Figure 8 One side of the second collection box 32 and one side of the filter box 28 are fixedly connected with a mounting seat 34, in which a threaded rod 35 is rotatably connected, and the circumferential thread of the threaded rod 35 is connected with a nut 36, which is used to quickly connect and fix the second collection box 32 to the filter box 28.

[0062] Reference Figure 4 The crushing assembly includes two crushing rollers 15 and two reducers 16. The two crushing rollers 15 are rotatably connected between the inner walls on both sides of the crushing box 3. The two reducers 16 are fixedly connected to the outer wall of one side of the crushing box 3. The output shafts of the two reducers 16 are respectively fixed to the two crushing rollers 15. The two crushing rollers 15 rotate in opposite directions. The crushing rollers 15 are driven to rotate by the reducers 16 to crush the raw materials.

[0063] Reference Figure 5The cleaning mechanism 2 includes a mounting shaft 17 and two pairs of transmission wheels 19 that rotate and pass through the two sides of the frame 1. A plurality of hook knives 18 are fixedly connected to the circumference of the mounting shaft 17. The top of the frame 1 is fixedly connected to a guide plate 20 used in conjunction with the hook knife 18. A plurality of avoidance openings 21 used in conjunction with the hook knife 18 are provided on one side of the guide plate 20. A first collection box 22 for collecting plastic products is fixedly connected to the top of the frame 1. The two pairs of transmission wheels 19 are respectively fixedly connected to the mounting shaft 17 and the two ends of the magnetic roller 7. The two transmission wheels 19 on the same side are transmission-connected. The mounting shaft 17 drives the hook knife 18 to rotate. The hook knife 18 hooks up the plastic product, and then cuts the plastic part after passing through the avoidance opening 21. The plastic part then falls into the first collection box 22 along the inclined guide plate 20.

[0064] The present invention also provides a method for using a building material and stone sorting and crushing screen, comprising the following steps:

[0065] S1: When in use, the reducer 16, the conveying motor and the exhaust fan 27 are started, and then the raw materials are put into the crushing box 3, the reducer 16 drives the two crushing rollers 15 to rotate, and the crushing rollers 15 are used to crush the raw materials, and the crushed raw materials fall on the surface of the conveyor belt 8;

[0066] S2: The conveying motor drives the magnetic roller 7 to rotate, and the conveyor belt 8 rotates in cooperation with the conveying roller 6, thereby conveying the raw materials. The main pipe 25 is connected to the external water pipe, and the tap water for dust reduction passes through the main pipe 25 and the water distribution pipe 23, and then is sprayed out through the nozzle 24, thereby reducing the dust generated when the crushed stones fall, and improving the on-site environment;

[0067] S3: After the exhaust fan 27 is started, the dust is sucked toward one side of the nozzle 24 through the filter box 28 and the exhaust hood 33, thereby improving the cleaning effect of the nozzle 24;

[0068] S4: When the conveying roller 6 rotates, the driving rod 13 is driven to rotate. After the driving rod 13 contacts the U-shaped frame 9, the U-shaped frame 9 is pushed downward. The U-shaped frame 9 rotates to make the top frame 11 away from the conveyor belt 8. Then the U-shaped frame 9 and the top frame 11 are reset under the action of the torsion spring 10, so as to lift up the conveyor belt 8 and shake the raw materials flat to prevent the raw materials from piling up. Then the raw materials are conveyed at one end of the conveyor belt 8, and the building materials that can be absorbed by the magnetic roller are separated from the ordinary raw materials.

[0069] S5: When the driving rod 13 rotates, it will also push the bending frame 31 upward, and the bending frame 31 drives the filter 29 to move upward. Then, after the driving rod 13 is out of contact with the bending frame 31, the filter 29 is reset under the push of the spring 30, thereby preventing the filter 29 from being blocked. The filter 29 is set in an inclined state, and can shake the extracted dust into the second collection box 32 during the shaking process, so that people can handle it conveniently;

[0070] S6: When the magnetic roller 7 rotates, it drives the installation shaft 17 to rotate through the transmission wheel 19, and the installation shaft 17 drives the hook knife 18 to rotate. The hook knife 18 hooks up the plastic product, and then cuts the plastic part after passing through the avoidance opening 21. The plastic part then falls into the first collection box 22 along the inclined guide plate 20.

Claims

1. A building material and stone sorting and crushing screen, characterized in that: include: A frame (1), wherein a conveying roller (6) and a magnetic roller (7) are rotatably connected between the two sides of the frame (1), a conveying belt (8) is transmission-connected between the conveying roller (6) and the magnetic roller (7), and a conveying motor is fixedly connected to one side of the frame (1), and an output shaft of the conveying motor is fixed to one end of the magnetic roller (7); A crushing box (3) is fixedly connected to the top of the frame (1), a crushing assembly for crushing stones is provided in the crushing box (3), a first dust reduction mechanism (4) for reducing dust is provided on one side of the crushing box (3), the first dust reduction mechanism (4) comprises a water distribution pipe (23) fixedly connected to one side of the crushing box (3), a plurality of nozzles (24) are fixedly connected to one side of the water distribution pipe (23), the water outlet end of the nozzle (24) faces the material outlet end at the bottom of the crushing box (3), and one end of the water distribution pipe (23) is fixedly connected to a main pipe (25) for water supply; An auxiliary dust reduction mechanism (5), the auxiliary dust reduction mechanism (5) being arranged on one side of the crushing box (3) and used in conjunction with the first dust reduction mechanism (4); A cleaning mechanism (2), wherein the cleaning mechanism (2) is arranged on the top of the frame (1) to clean the plastic products; A lifting mechanism, the lifting mechanism being arranged between two sides of the frame (1) to lift the middle part of the conveyor belt (8); The lifting mechanism comprises a U-shaped frame (9) and two driving rods (13). The U-shaped frame (9) rotates and penetrates between two sides of the frame (1). The circumference of the U-shaped frame (9) is fixedly connected to a lifting frame (11). The lifting frame (11) is located inside the conveyor belt (8) and contacts the top inner wall of the conveyor belt (8). The circumference of the U-shaped frame (9) is fixedly connected to two torsion springs (10). The two torsion springs (10) are respectively fixed to the inner walls of two sides of the frame (1). The driving rods (13) are respectively fixedly connected to the two ends of the conveyor roller (6) and used in conjunction with the two ends of the U-shaped frame (9). The auxiliary dust reduction mechanism (5) comprises a mounting plate (26) fixedly connected to one side of the crushing box (3), a filter box (28) and an exhaust hood (33); the upper surface of the mounting plate (26) is fixedly connected to an exhaust fan (27); an exhaust end of the exhaust fan (27) is fixedly connected to the top of the filter box (28); two springs (30) are fixedly connected to the inner walls of both sides of the filter box (28); a filter screen (29) is fixedly connected between the bottoms of the plurality of springs (30); the bottom of the filter box (28) is fixedly connected to the exhaust hood (33); the water distribution pipe (23) and the nozzle (24) are located in the exhaust hood (33); and the main pipe (25) passes through the exhaust hood (33); The cleaning mechanism (2) comprises a mounting shaft (17) which rotates and passes through two sides of the frame (1) and two pairs of transmission wheels (19); a plurality of hook knives (18) are fixedly connected to the circumference of the mounting shaft (17); the top of the frame (1) is fixedly connected to a material guide plate (20) used in conjunction with the hook knives (18); a plurality of avoidance openings (21) used in conjunction with the hook knives (18) are provided on one side of the material guide plate (20); a first collection box (22) for collecting plastic products is fixedly connected to the top of the frame (1); the two pairs of transmission wheels (19) are respectively fixedly connected to the mounting shaft (17) and the two ends of the magnetic roller (7); and the two transmission wheels (19) on the same side are transmission-connected.

2. A building material and stone separation and crushing screen according to claim 1, characterized in that: Both ends of the driving rod (13) are provided with mounting openings, and driving wheels are rotatably connected in the mounting openings.

3. A building material and stone separation and crushing screen according to claim 2, characterized in that: A bending frame (31) is fixedly connected to the bottom of the filter screen (29), the bending frame (31) passes through the filter box (28), two ends of the bending frame (31) are respectively located above the two driving rods (13), and a second collecting box (32) passing through is inserted into one side of the filter box (28), the second collecting box (32) is located below the filter screen (29).

4. A building material and stone separation and crushing screen according to claim 3, characterized in that: One side of the second collection box (32) and one side of the filter box (28) are both fixedly connected to a mounting seat (34), wherein a threaded rod (35) is rotatably connected inside one of the mounting seats (34), and a nut (36) is threadedly connected to the circumference of the threaded rod (35).

5. A building material and stone sorting and crushing screen according to claim 4, characterized in that: The crushing assembly comprises two crushing rollers (15) and two reducers (16); the two crushing rollers (15) are rotatably connected between two inner walls of a crushing box (3); the two reducers (16) are fixedly connected to one outer wall of the crushing box (3); the output shafts of the two reducers (16) are respectively fixed to the two crushing rollers (15); and the two crushing rollers (15) rotate in opposite directions.

6. A building material and stone separation and crushing screen according to claim 5, characterized in that: A plurality of support rods (14) are rotatably connected between the inner walls on both sides of the frame (1), and a scraper (12) is fixedly connected to the bottom of the frame (1), and the scraper (12) is in contact with the bottom of the conveyor belt (8).

7. The method for using a building material and stone separation and crushing screen according to claim 6, characterized in that: The following steps are involved: S1: When in use, the reducer (16), the conveying motor and the exhaust fan (27) are started, and then the raw materials are put into the crushing box (3). The reducer (16) drives the two crushing rollers (15) to rotate, and the crushing rollers (15) are used to crush the raw materials. The crushed raw materials fall onto the surface of the conveyor belt (8); S2: The conveying motor drives the magnetic roller (7) to rotate, and the conveyor belt (8) rotates in cooperation with the conveying roller (6), thereby conveying the raw materials. The main pipe (25) is connected to an external water pipe, and tap water for dust reduction passes through the main pipe (25) and the water distribution pipe (23), and then is sprayed out through the nozzle (24), thereby reducing the dust generated when the crushed stones fall, thereby improving the on-site environment; S3: After the exhaust fan (27) is started, the dust is sucked toward one side of the nozzle (24) through the filter box (28) and the exhaust hood (33), thereby improving the cleaning effect of the nozzle (24); S4: When the conveying roller (6) rotates, the driving rod (13) is driven to rotate. After the driving rod (13) contacts the U-shaped frame (9), the U-shaped frame (9) is pushed downward, and the U-shaped frame (9) rotates to make the top frame (11) away from the conveyor belt (8). Then, the U-shaped frame (9) and the top frame (11) are reset under the action of the torsion spring (10), thereby lifting the conveyor belt (8) and flattening the raw materials to prevent the raw materials from piling up. Then, the raw materials are conveyed at one end of the conveyor belt (8), and the building materials that can be absorbed by the magnetic roller are separated from the ordinary raw materials. S5: When the driving rod (13) rotates, it also pushes the bending frame (31) upwards, and the bending frame (31) drives the filter (29) to move upwards. After the driving rod (13) is out of contact with the bending frame (31), the filter (29) is reset under the push of the spring (30), thereby preventing the filter (29) from being blocked. The filter (29) is set in an inclined state, so that the extracted dust can be shaken into the second collection box (32) during the shaking process, so that people can handle it conveniently; S6: When the magnetic roller (7) rotates, it drives the installation shaft (17) to rotate through the transmission wheel (19), and the installation shaft (17) drives the hook knife (18) to rotate. The hook knife (18) hooks up the plastic product, and then cuts the plastic piece after passing through the avoidance opening (21). The plastic piece then falls into the first collection box (22) along the inclined material guide plate (20).

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