Raw material screening and conveying device for green and environment-friendly asphalt concrete preparation

Abstract

The utility model provides a raw material screening and conveying device for preparing green and environment-friendly asphalt concrete, belongs to the technical field of screening equipment, and solves the technical problems of non-uniform aggregate treatment, incomplete impurity separation, serious dust pollution and the like. Comprising a magnetic aggregate collecting box, a material uniformizing and vibrating mechanism, a magnetic separation conveyor, an elevator and a grading and winnowing mechanism, the magnetic aggregate collecting box is located below the magnetic separation conveyor, a scattering mechanism is arranged on the material uniformizing and vibrating mechanism, and a filtering box communicated with the grading and winnowing mechanism is arranged above the grading and winnowing mechanism; a settling box communicated with the grading winnowing mechanism is arranged below the grading winnowing mechanism, and the grading winnowing mechanism is connected with the elevator and the scattering mechanism. According to the utility model, the recycled aggregate of asphalt concrete is subjected to a series of continuous treatments such as scattering and refining, magnetic separation transportation, lifting and conveying, wind power screening and settling screening, and impurities are further separated, so that dust pollution in the process is avoided, and cyclic utilization of wind power is realized.

Description

Technical Field

[0001] This utility model belongs to the field of screening equipment technology, and relates to a green and environmentally friendly raw material screening and conveying device for asphalt concrete preparation. Background Technology

[0002] Asphalt concrete, commonly known as asphalt concrete, is a mixture made by artificially selecting mineral aggregates with a specific gradation, such as crushed stone or crushed gravel, stone chips or sand, and mineral powder, and mixing them with a certain proportion of road asphalt materials under strictly controlled conditions. Green and environmentally friendly asphalt concrete is a road construction material with significant environmental advantages and excellent performance. It extensively uses renewable, recyclable, or environmentally friendly materials. The raw materials used in its preparation often contain recycled aggregates, resulting in complex sources and numerous impurities. Traditional screening and conveying methods are insufficient to meet its high-quality and high-efficiency processing requirements.

[0003] Existing technologies are difficult to effectively separate impurities from raw materials, resulting in poor screening of agglomerated aggregates, slow screening speed, easy blockage of conveyors, and significant dust pollution during screening, which is not environmentally friendly.

[0004] A search revealed a Chinese patent document disclosing an asphalt concrete raw material screening device [Application No.: 202220989287.5; Publication No.: CN217221724U]. This asphalt concrete raw material screening device includes a base component and a dispersing component. The base component includes a support plate, a screening section, and a conveying section, both of which are mounted on the support plate. The dispersing component includes a slide rail, a slider, a threaded rod, support legs, a reaction vessel, a second motor, a connecting shaft, a horizontal shaft, a hammer, a third motor, and a plug. The slide rail is fixed to the upper surface of the support plate, and the slider is slidably mounted on the slide rail. In use, the dispersed raw material enters the feed hopper through the outlet of the reaction vessel. The first motor drives the auger to rotate, and the auger injects the dispersed raw material into the screen box through a cloth bag. The vibrator operates to screen the dispersed raw material through the screen. This screening device effectively eliminates clumps of raw material and improves the screening efficiency.

[0005] Although the asphalt concrete raw material screening device disclosed in this patent effectively eliminates clumps of raw materials and improves the screening efficiency, it does not solve the problem of dust pollution during the screening process and cannot recycle air.

[0006] Therefore, we propose a green and environmentally friendly raw material screening and conveying device for asphalt concrete preparation, which realizes a series of continuous processes such as dispersing and homogenizing recycled aggregates for asphalt concrete, magnetic separation and transportation, lifting and conveying, pneumatic screening and sedimentation screening, while further separating impurities, avoiding dust pollution during screening and realizing the recycling of wind power. Utility Model Content

[0007] The purpose of this utility model is to address the aforementioned problems in existing technologies by proposing a green and environmentally friendly raw material screening and conveying device for asphalt concrete preparation. The technical problem to be solved by this utility model is: how to achieve a series of continuous processes for recycled aggregates in asphalt concrete, including dispersing and homogenizing, magnetic separation and transportation, lifting and conveying, pneumatic screening and sedimentation screening, while further separating impurities, avoiding dust pollution during screening, and realizing the recycling of wind power.

[0008] The objective of this utility model can be achieved through the following technical solutions:

[0009] A green and environmentally friendly raw material screening and conveying device for asphalt concrete preparation includes a magnetic aggregate collection box and a material equalization vibration mechanism, a magnetic separator conveyor, an elevator, and a grading air separation mechanism arranged sequentially from front to back. The magnetic aggregate collection box is located below the magnetic separator conveyor. A dispersing mechanism is provided on the material equalization vibration mechanism. A filter box connected to the grading air separation mechanism is provided above it. A settling box connected to the grading air separation mechanism is provided below it. The grading air separation mechanism is connected to the elevator and the dispersing mechanism.

[0010] The working principle of this utility model is as follows: The recycled aggregate of the adhered asphalt concrete is first dispersed by a dispersing mechanism and then falls into a uniform vibrating mechanism. Under the action of vibration, it is evenly dispersed and then passes through a magnetic separator conveyor. The magnetic aggregate falls into the magnetic aggregate collection box below, while the non-magnetic aggregate continues to be conveyed to the elevator. The elevator lifts the aggregate and sends it to the grading and air-separating mechanism. Using wind power, the aggregates of different masses are separated into four types due to differences in their movement trajectories: heavier aggregates, medium-sized aggregates, lighter aggregates and mixtures of plastics, wood chips, etc., and dust-laden airflow. The lighter aggregates and mixtures of plastics, wood chips, etc. fall into the settling box, while the lighter plastics, wood chips, etc. float on the liquid surface. The aggregates settle to the bottom of the liquid for further separation. The grading and air-separating mechanism is connected to the dispersing mechanism to recover the dust-laden airflow generated during the dispersing process. The dust-laden airflow generated during the dispersing and air-separating processes enters the filter box for purification. The purified air is recycled, realizing a green and environmentally friendly raw material screening and conveying process.

[0011] The material equalization vibration mechanism includes a material equalization vibration frame, with four spring connecting rods at each of the four corners of the frame. An inclined material equalization vibration bucket is fixed below the four spring connecting rods, and a vibration motor is fixed at the lower end of the material equalization vibration bucket.

[0012] With the above structure, the vibrating motor drives the material leveling vibrating bucket to vibrate. At this time, the spring connecting rods at the four corners of the material leveling vibrating machine frame play a role in buffering and elastic support. After the recycled aggregate enters the material leveling vibrating bucket, under the dual action of tilting and vibration, it can move evenly to the lower outlet of the material leveling vibrating bucket and disperse.

[0013] The dispersing mechanism includes a dispersing box and a dispersing motor. Both the dispersing box and the dispersing motor are fixed above the uniform vibrating machine frame. A dispersing feed hopper is fixed above the dispersing box. Two dispersing shafts are provided on the dispersing box, and both shafts pass through the dispersing box. A transmission gear is fixed at one end of each shaft, and the two transmission gears mesh with each other. A pulley pair is provided between one of the dispersing shafts and the drive shaft of the dispersing motor. Dispersing rollers are provided on each shaft, and the rollers are located inside the dispersing box. A dispersing discharge hopper is fixed at the lower end of the dispersing box and is connected to it. The dispersing discharge hopper is located above the uniform vibrating hopper and extends into the uniform vibrating hopper.

[0014] With the above structure, the drive shaft of the dispersing motor drives one of the dispersing shafts to rotate through a pulley pair. The two transmission gears mesh, causing the two dispersing shafts to rotate, which in turn drives the two dispersing rollers to rotate. The recycled aggregate enters the dispersing machine box from the dispersing feed hopper. The two dispersing rollers rotate in opposite directions, breaking up the sticky aggregate and making the dispersed aggregate evenly distributed. The aggregate then falls into the uniform vibrating hopper below through the dispersing discharge hopper.

[0015] The magnetic separator conveyor includes a magnetic separator frame and a conveyor frame. Four turnbuckles are provided between the magnetic separator frame and the conveyor frame. The conveyor frame is located inside the magnetic separator frame. A vibrating motor is fixed on the conveyor frame. A conveying roller is provided at the feed end of the conveyor frame, and a magnetic roller is provided at the discharge end of the conveyor frame. A conveyor motor is fixed on the conveyor frame, and the drive shaft of the conveyor motor is connected to the magnetic roller. A conveyor belt is provided on the conveying roller and the magnetic roller. Two symmetrically arranged conveyor baffles are fixed above the conveyor frame. The conveyor baffles are located on both sides of the conveyor belt. An inclined discharge baffle is fixed at the discharge end of each conveyor baffle. A magnetic separator magnet and an adjusting scraper are provided inside the conveyor frame. The magnetic separator magnet is located inside the conveyor belt, and the adjusting scraper is located below the conveyor belt and abuts against the conveyor belt. A magnetic collection box is located below the adjusting scraper.

[0016] Using the above structure, the tightness of the four turnbuckles can be adjusted to adjust the level or tilt of the conveyor frame;

[0017] Vibration motor 2 drives the conveyor frame to vibrate, so that the aggregate is evenly distributed on the conveyor belt. Turnbuckles play a role in buffering and elastic support. The aggregate enters from the feed end of the conveyor frame. The drive shaft of the conveyor motor drives the magnetic roller to rotate. Under the drive of the conveyor roller and the magnetic roller, the aggregate moves with the conveyor belt towards the discharge end. The magnetic separator on the inner side of the conveyor belt and the magnetic roller together generate a magnetic area. When the aggregate passes through the magnetic area, the magnetic aggregate is attracted to the conveyor belt, while the non-magnetic aggregate continues to move forward. When the conveyor belt with magnetic aggregate passes the adjusting scraper, the adjusting scraper abuts against the conveyor belt and scrapes off the magnetic aggregate, causing it to fall into the magnetic aggregate collection box below. The conveyor baffle can prevent the aggregate from falling from both sides of the conveyor belt. The discharge baffle at the discharge end guides the non-magnetic aggregate to be discharged smoothly.

[0018] The elevator includes an elevator body, a lifting feed hopper fixed at the lower front side of the elevator body, the lifting feed hopper being located below the discharge end of the conveyor belt, and a lifting discharge hopper fixed at the upper rear side of the elevator body.

[0019] With the above structure, the collected material output from the discharge end of the magnetic separator conveyor falls into the lifting feed hopper and enters the body of the elevator. The elevator body lifts the collected material from below and discharges it from the lifting discharge hopper, then transports it to the grading and air separation mechanism for further processing.

[0020] The grading air separation mechanism includes an air separation chamber and four air separation supports. The air separation chamber is located at the top of the four air separation supports. An air separation feed pipe is connected to the front of the top of the air separation chamber and is connected to the lifting discharge hopper. A filter box is located at the rear of the top of the air separation chamber. Two symmetrically arranged fans are located in the middle of the top of the air separation chamber. The air inlet of the fans is connected to the filter box, and the air outlet of the fans is connected to the fan outlet pipe. A material leveling inclined plate is fixed inside the air separation chamber and is located at the material drop point of the air separation feed pipe. Two symmetrically arranged air blowing pipes, a first baffle, a second baffle, and a third baffle are fixed sequentially from front to back on the bottom of the air separation chamber. The three baffles and the air blowing pipe are all located at the lower end of the uniform material inclined plate. The first baffle is flush with the discharge end of the uniform material inclined plate. The air outlet of the air blowing pipe is located between the uniform material inclined plate and the first baffle. The air blowing pipe is connected to the air outlet pipe of the blower on the same side. The lower end of the air classifier box is equipped with a first discharge pipe, a second discharge pipe and a third discharge pipe connected to it. The first discharge pipe is located between the first baffle and the second baffle. The second discharge pipe is located between the second baffle and the third baffle. The third discharge pipe is located at the rear end of the third baffle. The settling box is located below the third discharge pipe. The upper rear side of the air classifier box is equipped with a suction pipe connected to it. The suction pipe is located below the filter box and is connected to the dispersing discharge hopper.

[0021] Using the above structure, the aggregate from the lifting hopper enters the air classifier box through the air classifier feed pipe and falls onto the equalizing inclined plate, causing the aggregate to spread evenly and slide down. The blower blows air through the blower outlet pipe into the blowing pipe. Due to the different masses of the aggregates, their movement trajectories differ under the action of the wind. Heavier aggregates fall directly between the first and second baffles and are discharged from the first discharge pipe; medium-sized aggregates fall between the second and third baffles and are discharged from the second discharge pipe; lighter aggregates, such as plastics and wood chips, are discharged from the second discharge pipe. After passing the third baffle, the material exits from the third discharge pipe and falls into the settling tank below. Lighter materials such as plastics and wood chips float on the surface of the liquid, while the aggregate settles to the bottom of the liquid for further separation. The dust-laden airflow in the air classifier enters the filter box for filtration and purification. The purified air is then drawn into the fan for recycling. At the same time, the suction pipe draws the dust-laden airflow generated during the dispersion of the aggregate in the discharge hopper into the air classifier, where it enters the filter box for filtration and purification. This process is then utilized by the fan, forming a cycle and reducing dust pollution.

[0022] Compared with existing technologies, this green and environmentally friendly raw material screening and conveying device for asphalt concrete preparation has the following advantages:

[0023] 1. The agglomerated recycled aggregate is broken up and separated by a dispersing mechanism to facilitate subsequent vibration discharge;

[0024] 2. The aggregate is evenly dispersed by vibration through a material-distributing vibration mechanism.

[0025] 3. The magnetic separator conveyor is used to separate magnetic aggregates from non-magnetic aggregates;

[0026] 4. The hoist is used to lift and transport the aggregates;

[0027] 5. The graded air separation mechanism enables the screening of aggregates, solves the problem of dust pollution during the screening process, and realizes the recycling of air power.

[0028] 6. The plastic, wood chips and lighter aggregates are further screened by using a grading air separation mechanism and a settling box.

[0029] 7. By combining the graded air separation mechanism with the dispersing mechanism, the smoke and dust generated during the dispersing process are sucked away, which solves the problem of excessive dust-laden airflow during the dispersing process and avoids dust pollution. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of this utility model.

[0031] Figure 2 This is a three-dimensional structural diagram of the dispersing mechanism and the material equalization vibration mechanism in this utility model.

[0032] Figure 3This is a three-dimensional structural diagram of the magnetic separator conveyor and the magnetic aggregate collection box in this utility model.

[0033] Figure 4 This is a three-dimensional structural diagram of the elevator in this utility model.

[0034] Figure 5 This is a three-dimensional structural diagram of the filter box, settling box, and grading air separation mechanism in this utility model.

[0035] Figure 6 This is a side view of the filter box, settling box, and grading air separation mechanism in this utility model.

[0036] In the diagram, 1. Dispersing mechanism; 2. Material equalization vibration mechanism; 3. Elevator; 4. Grading and air separation mechanism; 5. Magnetic separation conveyor; 6. Dispersing roller; 7. Dispersing motor; 8. Pulley pair; 9. Dispersing discharge hopper; 10. Material equalization vibration machine frame; 11. Vibration motor one; 12. Material equalization vibration hopper; 13. Spring connecting rod; 14. Dispersing shaft; 15. Dispersing feed hopper; 16. Magnetic separator frame; 17. Conveyor frame; 18. Conveyor baffle; 19. Magnetic separator magnet; 20. Magnetic collection box; 21. Adjusting scraper; 22. 23. Turnbuckle; 24. Magnetic roller; 25. Discharge baffle; 26. Vibrating motor II; 27. Elevator body; 28. Elevating discharge hopper; 29. ​​Elevating feed hopper; 30. Air classifier feed pipe; 31. Material leveling inclined plate; 32. Air blowing pipe; 33. Blower outlet pipe; 34. Blower; 35. Filter box; 36. Suction pipe; 37. First baffle; 38. Second baffle; 39. Third baffle; 40. Air classifier box; 41. First discharge pipe; 42. Second discharge pipe; 43. Third discharge pipe; 44. Settling box. Detailed Implementation

[0037] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0038] like Figures 1-6 As shown, this green and environmentally friendly asphalt concrete preparation raw material screening and conveying device includes a magnetic aggregate collection box 20 and a material equalization vibration mechanism 2, a magnetic separation conveyor 5, an elevator 3, and a grading air separation mechanism 4 arranged sequentially from front to back. The magnetic aggregate collection box 20 is located below the magnetic separation conveyor 5. The material equalization vibration mechanism 2 is equipped with a dispersing mechanism 1. The grading air separation mechanism 4 is equipped with a filter box 34 connected to it above, and a settling box 43 connected to it below. The grading air separation mechanism 4 is connected to the elevator 3 and the dispersing mechanism 1.

[0039] In this embodiment, the recycled aggregate of the adhered asphalt concrete is first dispersed by the dispersing mechanism 1 and then falls into the uniform vibrating mechanism 2. Under the action of vibration, it is evenly dispersed and then passes through the magnetic separator conveyor 5. The magnetic aggregate falls into the magnetic aggregate collection box 20 below, while the non-magnetic aggregate continues to be conveyed to the elevator 3. The elevator 3 lifts the aggregate and sends it to the grading air separation mechanism 4. The air force is used to separate the aggregates of different masses into four types due to the difference in their movement trajectories: heavier aggregates, medium-sized aggregates, lighter aggregates and mixtures of plastics, wood chips, etc., and dust-laden airflow. The lighter aggregates and mixtures of plastics, wood chips, etc. fall into the settling box 43, while the lighter plastics, wood chips, etc. float on the liquid surface. The aggregates settle to the bottom of the liquid for further separation. The grading air separation mechanism 4 is connected to the dispersing mechanism 1 to recover the dust-laden airflow generated during the dispersing process. The dust-laden airflow generated during the dispersing and air separation processes enters the filter box 34 for purification. The purified air is recycled to achieve a green and environmentally friendly raw material screening and conveying process.

[0040] The material equalization vibration mechanism 2 includes a material equalization vibration frame 10. Four spring connecting rods 13 are provided at the four corners of the material equalization vibration frame 10. A material equalization vibration bucket 12 is fixed below the four spring connecting rods 13 and is inclined. A vibration motor 11 is fixed at the lower end of the material equalization vibration bucket 12.

[0041] In this embodiment, the vibration motor 11 drives the material leveling vibration bucket 12 to vibrate. At this time, the spring connecting rods 13 at the four corners of the material leveling vibration frame 10 play a buffering and elastic support role. After the recycled aggregate enters the material leveling vibration bucket 12, under the dual action of tilting and vibration, it can move evenly to the lower outlet of the material leveling vibration bucket 12 and disperse.

[0042] The dispersing mechanism 1 includes a dispersing box and a dispersing motor 7. Both the dispersing box and the dispersing motor 7 are fixed above the uniform vibrating machine frame 10. A dispersing feed hopper 15 is fixed above the dispersing box. Two dispersing shafts 14 are provided on the dispersing box. Both dispersing shafts 14 pass through the dispersing box. A transmission gear is fixed at one end of each dispersing shaft 14. The two transmission gears mesh with each other. A pulley pair 8 is provided between one of the dispersing shafts 14 and the drive shaft of the dispersing motor 7. A dispersing roller 6 is provided on each dispersing shaft 14. The dispersing roller 6 is located inside the dispersing box. A dispersing discharge hopper 9 is fixed at the lower end of the dispersing box and is connected to it. The dispersing discharge hopper 9 is located above the uniform vibrating hopper 12 and extends into the uniform vibrating hopper 2.

[0043] In this embodiment, the drive shaft of the dispersing motor 7 drives one of the dispersing shafts 14 to rotate via the pulley pair 8. The two transmission gears mesh, causing the two dispersing shafts 14 to rotate, which in turn drives the two dispersing rollers 6 to rotate. The recycled aggregate enters the dispersing machine box from the dispersing feed hopper 15. The two dispersing rollers 6 rotate in opposite directions to disperse the sticky aggregate, making the dispersed aggregate evenly distributed. The aggregate falls into the uniform vibrating hopper 12 below through the dispersing discharge hopper 9.

[0044] The magnetic separator conveyor 5 includes a magnetic separator frame 16 and a conveyor frame 17. Four turnbuckles 22 are provided between the magnetic separator frame 16 and the conveyor frame 17. The conveyor frame 17 is located inside the magnetic separator frame 16. A vibrating motor 25 is fixed on the conveyor frame 17. A conveying roller is provided at the feed end of the conveyor frame 17, and a magnetic roller 23 is provided at the discharge end of the conveyor frame 17. A conveying motor is fixed on the conveyor frame 17, and the drive shaft of the conveying motor is connected to the magnetic roller 23. The conveying roller and the magnetic roller... 23 is equipped with a conveyor belt. Two symmetrically arranged conveyor baffles 18 are fixed above the conveyor frame 17. The conveyor baffles 18 are located on both sides of the conveyor belt. An inclined discharge baffle 24 is fixed on the discharge end of each conveyor baffle 18. A magnetic separator 19 and an adjusting scraper 21 are provided on the inner side of the conveyor frame 17. The magnetic separator 19 is located on the inner side of the conveyor belt. The adjusting scraper 21 is located below the conveyor belt and abuts against the conveyor belt. The magnetic collection box 20 is located below the adjusting scraper 21.

[0045] In this embodiment, the tightness of the four turnbuckles 22 is adjusted to adjust the horizontal or tilted position of the conveyor frame 17.

[0046] Vibration motor 25 drives the conveyor frame 17 to vibrate, so that the aggregate is evenly distributed on the conveyor belt. Turnbuckle 22 plays a role in buffering and elastic support. The aggregate enters from the feed end of the conveyor frame 17. The drive shaft of the conveyor motor drives the magnetic roller 23 to rotate. Under the drive of the conveyor roller and the magnetic roller 23, the aggregate moves towards the discharge end with the conveyor belt. The magnetic separator 19 on the inner side of the conveyor belt and the magnetic roller 23 together generate a magnetic area. When the aggregate passes through the magnetic area, the magnetic aggregate is attracted to the conveyor belt, while the non-magnetic aggregate continues to move forward. When the conveyor belt with magnetic aggregate passes the adjusting scraper 21, the adjusting scraper 21 abuts against the conveyor belt and scrapes off the magnetic aggregate, so that it falls into the magnetic aggregate collection box 20 below. The conveyor baffle 18 can prevent the aggregate from falling from both sides of the conveyor belt. The discharge baffle 24 at the discharge end guides the non-magnetic aggregate to be discharged smoothly.

[0047] The elevator 3 includes an elevator body 26, a lifting feed hopper 28 fixedly located on the lower front side of the elevator body 26, the lifting feed hopper 28 being located below the discharge end of the conveyor belt, and a lifting discharge hopper 27 fixedly located on the upper rear side of the elevator body 26.

[0048] In this embodiment, the collected material output from the discharge end of the magnetic separator conveyor 5 falls into the lifting feed hopper 28 and enters the elevator body 26. The elevator body 26 lifts the collected material from below and discharges it from the lifting discharge hopper 27, which then transports it to the grading air separation mechanism 4 for further processing.

[0049] The grading air separation mechanism 4 includes an air separation box 39 and four air separation supports. The air separation box 39 is located at the top of the four air separation supports. An air separation feed pipe 29 is connected to the front of the top of the air separation box 39. The air separation feed pipe 29 is connected to the lifting discharge hopper 27. A filter box 34 is located at the rear of the top of the air separation box 39. Two symmetrically arranged fans 33 are located in the middle of the top of the air separation box 39. The air inlet of the fans 33 is connected to the filter box 34, and the air outlet of the fans 33 is connected to the fan outlet pipe 32. A material leveling inclined plate 30 is fixed inside the air separation box 39. The material leveling inclined plate 30 is located at the material drop point of the air separation feed pipe 29. Two symmetrically arranged air blowing pipes 31, a first baffle 36, a second baffle 37, and a third baffle 38 are fixed sequentially from front to back on the inner bottom of the air separation box 39. All pipes 31 are located at the lower end of the uniform material inclined plate 30. The first baffle 36 is flush with the discharge end of the uniform material inclined plate 30. The air outlet of the blowing pipe 31 is located between the uniform material inclined plate 30 and the first baffle 36. The blowing pipe 31 is connected to the blower outlet pipe 32 on the same side. The lower end of the air classifier box 39 is provided with a first discharge pipe 40, a second discharge pipe 41 and a third discharge pipe 42 connected thereto. The first discharge pipe 40 is located between the first baffle 36 and the second baffle 37. The second discharge pipe 41 is located between the second baffle 37 and the third baffle 38. The third discharge pipe 42 is located at the rear end of the third baffle 38. The settling box 43 is located below the third discharge pipe 42. The upper rear side of the air classifier box 39 is provided with a suction pipe 35 connected thereto. The suction pipe 35 is located below the filter box 34 and is connected to the dispersing discharge hopper 9.

[0050] In this embodiment, the aggregate exiting from the lifting hopper 27 enters the air classifier box 39 via the air classifier feed pipe 29 and falls onto the uniform distribution inclined plate 30, causing the aggregate to spread evenly and slide down. The blower 33 blows air through the blower outlet pipe 32 into the blowing pipe 31. Due to the different masses of the aggregates, their movement trajectories differ under the action of the wind. Heavier aggregates fall directly between the first baffle 36 and the second baffle 37 and are discharged from the first discharge pipe 40; medium-sized aggregates fall between the second baffle 37 and the third baffle 38 and are discharged from the second discharge pipe 41; lighter aggregates are discharged along with plastics, etc. Wood chips and other materials pass over the third baffle 38, exit from the third discharge pipe 42, and fall into the settling tank 43 below. Lighter materials such as plastics and wood chips float on the liquid surface, while the aggregate settles to the bottom of the liquid for further separation. The dust-laden airflow in the air classifier box 39 enters the filter box 34 for filtration and purification. The purified air is then drawn into the fan 33 for recycling. At the same time, the suction pipe 35 draws the dust-laden airflow generated in the dispersing hopper 9 during the dispersing process into the air classifier box 39, and then into the filter box 34 for filtration and purification. This airflow is then utilized by the fan 33, forming a cycle and reducing dust pollution.

[0051] The working principle of this utility model is as follows: Adjusting the tightness of the four basket screws 22, thereby adjusting the horizontal or inclined position of the conveyor frame 17;

[0052] Recycled aggregate for asphalt concrete enters the dispersing chamber from the dispersing hopper 15. The drive shaft of the dispersing motor 7 drives one of the dispersing shafts 14 to rotate via the pulley pair 8. The two transmission gears mesh, causing both dispersing shafts 14 to rotate, which in turn drives two dispersing rollers 6 to rotate. The recycled aggregate enters the dispersing chamber from the dispersing hopper 15, and the two dispersing rollers 6 rotate in opposite directions, breaking up the adhering aggregate and making the dispersed aggregate evenly distributed. It falls into the uniform vibrating hopper 12 below through the dispersing outlet hopper 9. At this time, the vibrating motor 11 drives the uniform vibrating hopper 12 to vibrate. The spring connecting rods 13 at the four corners of the uniform vibrating frame 10 play a role in buffering and elastic support. After entering the uniform vibrating hopper 12, the recycled aggregate can move evenly towards the lower outlet of the uniform vibrating hopper 12 and disperse under the dual action of inclination and vibration, and then reach the magnetic separator conveyor 5.

[0053] Vibrating motor 25 drives the conveyor frame 17 to vibrate, causing the aggregate to be evenly distributed on the conveyor belt. Turnbuckle 22 acts as a buffer and provides elastic support. The aggregate enters from the feed end of the conveyor frame 17. The drive shaft of the conveyor motor drives the magnetic roller 23 to rotate. Under the drive of the conveyor roller and the magnetic roller 23, the aggregate moves towards the discharge end with the conveyor belt. The magnetic separator 19 on the inner side of the conveyor belt and the magnetic roller 23 together create a magnetic area. When the aggregate passes through the magnetic area, the magnetic aggregate is attracted to the conveyor belt, while the non-magnetic aggregate continues to move forward. The magnetic aggregate... When the conveyor belt passes the adjusting scraper 21, the adjusting scraper 21 abuts against the conveyor belt, scraping off the magnetic aggregate and causing it to fall into the magnetic aggregate collection box 20 below. The conveyor baffle 18 prevents the aggregate from falling from both sides of the conveyor belt, and the discharge baffle 24 at the discharge end guides the non-magnetic aggregate to be discharged smoothly. The aggregate output from the discharge end of the magnetic separator conveyor 5 falls into the lifting feed hopper 28 and enters the elevator body 26. The elevator body 26 lifts the aggregate from below and discharges it from the lifting discharge hopper 27, which then transports it to the grading and air separation mechanism 4 for further processing.

[0054] The aggregate exiting from the lifting hopper 27 enters the air classifier box 39 through the air classifier feed pipe 29 and falls onto the uniform distribution inclined plate 30, causing the aggregate to spread evenly and slide down. The blower 33 blows air through the blower outlet pipe 32 into the blowing pipe 31. Due to the different masses of the aggregates, their movement trajectories differ under the action of the wind. Heavier aggregates fall directly between the first baffle 36 and the second baffle 37 and are discharged from the first discharge pipe 40; medium-sized aggregates fall between the second baffle 37 and the third baffle 38 and are discharged from the second discharge pipe 41; lighter aggregates, such as plastics and wood chips, pass over the third baffle 38. Material is discharged from the third discharge pipe 42 and falls into the settling box 43 below. Lighter materials such as plastics and wood chips float on the surface of the liquid, while the aggregate settles to the bottom of the liquid for further separation. The dust-laden airflow in the air classifier box 39 enters the filter box 34 for filtration and purification. The purified air is then drawn into the fan 33 for recycling. At the same time, the suction pipe 35 draws the dust-laden airflow generated in the dispersing hopper 9 during the dispersing process into the air classifier box 39, and then into the filter box 34 for filtration and purification. This airflow is then utilized by the fan 33, forming a cycle that reduces dust pollution and achieves a green and environmentally friendly raw material screening and conveying process.

[0055] In summary, the dispersing mechanism 1 breaks up and separates the clumps of recycled aggregate, making it easier for subsequent vibration discharge.

[0056] The material is evenly dispersed by vibration through the material distribution vibration mechanism 2.

[0057] The magnetic separator conveyor 5 is used to separate magnetic aggregates from non-magnetic aggregates.

[0058] The hoist 3 is used to lift and transport the aggregate.

[0059] The graded air separation mechanism 4 is used to screen the aggregates, which solves the problem of dust pollution during the screening process and also realizes the recycling of air power.

[0060] The plastic, wood chips and lighter aggregates are further screened by the combination of the grading air separation mechanism 4 and the settling box 43.

[0061] By combining the graded air separation mechanism 4 with the dispersing mechanism 1, the smoke and dust generated during the dispersing process are sucked away, which solves the problem of excessive dust-laden airflow during the dispersing process and avoids dust pollution.

[0062] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A green and environmentally friendly raw material screening and conveying device for asphalt concrete preparation, comprising a magnetic aggregate collection box (20) and a material equalization vibration mechanism (2), a magnetic separator conveyor (5), an elevator (3), and a grading air separation mechanism (4) arranged sequentially from front to back, characterized in that, The magnetic aggregate collection box (20) is located below the magnetic separator conveyor (5). The material equalization vibration mechanism (2) is equipped with a dispersing mechanism (1). The grading air separation mechanism (4) is equipped with a filter box (34) connected to it above the grading air separation mechanism (4). The grading air separation mechanism (4) is equipped with a settling box (43) connected to it below the grading air separation mechanism (4). The grading air separation mechanism (4) is connected to the elevator (3), and the grading air separation mechanism (4) is connected to the dispersing mechanism (1).

2. The green and environmentally friendly asphalt concrete preparation raw material screening and conveying device according to claim 1, characterized in that, The material equalization vibration mechanism (2) includes a material equalization vibration frame (10), and four spring connecting rods (13) are provided at the four corners of the material equalization vibration frame (10). A material equalization vibration bucket (12) is fixed below the four spring connecting rods (13) and a vibration motor (11) is fixed at the lower end of the material equalization vibration bucket (12).

3. The green and environmentally friendly asphalt concrete preparation raw material screening and conveying device according to claim 2, characterized in that, The dispersing mechanism (1) includes a dispersing box and a dispersing motor (7). The dispersing box and the dispersing motor (7) are both fixed above the uniform vibrating machine frame (10). A dispersing feed hopper (15) is fixed above the dispersing box. Two dispersing shafts (14) are provided on the dispersing box. The dispersing shafts (14) pass through the dispersing box. A transmission gear is fixed at one end of each dispersing shaft (14). The two transmission gears mesh with each other. A pulley pair (8) is provided between one of the dispersing shafts (14) and the drive shaft of the dispersing motor (7). A dispersing roller (6) is provided on each dispersing shaft (14). The dispersing roller (6) is located inside the dispersing box. A dispersing discharge hopper (9) is fixed at the lower end of the dispersing box and communicates with it. The dispersing discharge hopper (9) is located above the uniform vibrating hopper (12) and extends into the uniform vibrating hopper (12).

4. The green and environmentally friendly asphalt concrete preparation raw material screening and conveying device according to claim 3, characterized in that, The magnetic separator conveyor (5) includes a magnetic separator frame (16) and a conveyor frame (17). Four turnbuckles (22) are provided between the magnetic separator frame (16) and the conveyor frame (17). The conveyor frame (17) is located inside the magnetic separator frame (16). A second vibrating motor (25) is fixed on the conveyor frame (17). A conveying roller is provided on the feed end of the conveyor frame (17), and a magnetic roller (23) is provided on the discharge end of the conveyor frame (17). A conveying motor is fixed on the conveyor frame (17), and the drive shaft of the conveying motor is connected to the magnetic roller (23) for transmission. The conveying roller and the magnetic roller are connected to the magnetic roller (23). A conveyor belt is provided on the magnetic roller (23). Two symmetrically arranged conveyor baffles (18) are fixed above the conveyor frame (17). The conveyor baffles (18) are located on both sides of the conveyor belt. An inclined discharge baffle (24) is fixed on the discharge end of the conveyor baffles (18). A magnetic separator (19) and an adjusting scraper (21) are provided on the inner side of the conveyor frame (17). The magnetic separator (19) is located on the inner side of the conveyor belt. The adjusting scraper (21) is located below the conveyor belt and abuts against the conveyor belt. The magnetic collection box (20) is located below the adjusting scraper (21).

5. The green and environmentally friendly asphalt concrete preparation raw material screening and conveying device according to claim 4, characterized in that, The elevator (3) includes an elevator body (26), a lifting feed hopper (28) is fixed on the lower front side of the elevator body (26), the lifting feed hopper (28) is located below the discharge end of the conveyor belt, and a lifting discharge hopper (27) is fixed on the upper rear side of the elevator body (26).

6. The green and environmentally friendly asphalt concrete preparation raw material screening and conveying device according to claim 5, characterized in that, The grading air separation mechanism (4) includes an air separation box (39) and four air separation supports. The air separation box (39) is located at the top of the four air separation supports. An air separation feed pipe (29) is provided on the front side of the top of the air separation box (39) and is connected to it. The air separation feed pipe (29) is connected to the lifting discharge hopper (27). The filter box (34) is located on the rear side of the top of the air separation box (39). Two symmetrically arranged fans (33) are provided in the middle of the top of the air separation box (39). The air inlet of (33) is connected to the filter box (34), and the air outlet of the blower (33) is connected to the blower outlet pipe (32). The inside of the air classifier box (39) is fixed with a material leveling plate (30). The material leveling plate (30) is set at the material drop point of the air classifier feed pipe (29). On the bottom of the air classifier box (39), two symmetrically arranged air blowing pipes (31), a first baffle (36), a second baffle (37) and a third baffle (38) are fixed from front to back. All are located at the lower end of the uniform material inclined plate (30). The first baffle (36) is flush with the discharge end of the uniform material inclined plate (30). The air outlet of the blowing pipe (31) is located between the uniform material inclined plate (30) and the first baffle (36). The blowing pipe (31) is connected to the air outlet pipe (32) of the blower on the same side. The lower end of the air classifier box (39) is provided with a first discharge pipe (40), a second discharge pipe (41) and a third discharge pipe (42) connected to it. The first discharge pipe (40) is located at the lower end of the first baffle. (36) and the second baffle (37), the second discharge pipe (41) is located between the second baffle (37) and the third baffle (38), the third discharge pipe (42) is located at the rear end of the third baffle (38), the settling box (43) is located below the third discharge pipe (42), the upper rear side of the air classifier box (39) is provided with a suction pipe (35) connected to it, the suction pipe (35) is located below the filter box (34), and the suction pipe (35) is connected to the dispersing discharge hopper (9).

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