Asphalt mixture particle grading device

Abstract

The utility model discloses an asphalt mixture particle grading device, and relates to the technical field of waste asphalt mixture screening. The vibrating screen comprises a screening box, a discharging port is formed in the lower side of the screening box, vibrating frames are fixedly connected to the left side and the right side of the screening box, a first positioning box is fixedly connected to the surface of the left side of the screening box, two screening plates are arranged in the screening box, an adjusting mechanism is arranged in the first positioning box, and the two screening plates are fixedly connected to the adjusting mechanism. The adjusting mechanisms can adjust the inclination angles of the screening plates, the two sets of supporting mechanisms are arranged on the front side of the screening box, the supporting mechanisms can play a role in supporting the corresponding screening plates, asphalt mixture particles can be fully screened on the screening plates and then discharged out of the screening box, the screening precision is higher, and the screening efficiency is improved. And therefore, the particle grading precision of the asphalt mixture is improved, and the practicability of the particle grading device of the asphalt mixture is improved.

Description

Technical Field

[0001] This utility model belongs to the field of waste asphalt mixture screening technology, and specifically relates to an asphalt mixture particle grading device. Background Technology

[0002] Asphalt concrete is a road paving material made by uniformly mixing asphalt with materials such as crushed stone, stone chips, and mineral powder. After many years of use, the asphalt concrete pavement becomes damaged due to the gradual aging of the asphalt, rendering it unusable. At this point, it is necessary to use engineering machinery to mill the damaged asphalt concrete surface layer, recycle the old asphalt concrete material, and then pave the road with new or recycled asphalt concrete material.

[0003] Screening is an essential step in the screening and reuse of waste asphalt mixtures. Asphalt mixtures of different particle sizes have different uses. Existing patent CN202420696313.4 describes a waste asphalt mixture screening device. Each layer of screen is equipped with a de-clogging device. The de-clogging device's mesh size is larger than that of the upper screen, preventing secondary clogging. The de-clogging device includes a top-mounted cleaning component and a translational component, capable of cleaning the odd-numbered and even-numbered rows of the screen sequentially. This device can promptly and quickly clear blockages on the screen, improving production efficiency.

[0004] However, in this comparative example, the asphalt mixture is poured onto a screen and screened using the vibration of the inclined screen. During the screening process, the asphalt mixture is guided by the inclined screen and falls onto a belt conveyor below the discharge port. However, in this screening method where the asphalt mixture is screened and discharged simultaneously, due to factors such as the accumulation of asphalt mixture particles on the screen, some particles may not have time to come into contact with the screen or may be discharged from the screen without being fully screened. This results in low screening accuracy of the asphalt mixture particles, which in turn reduces the grading of the asphalt mixture particles, thus making the asphalt mixture particle grading device less practical. Utility Model Content

[0005] In the comparative example, asphalt mixture is poured onto a screen and sieved using the vibration of the inclined screen. During the sieving process, the asphalt mixture is guided by the inclined screen and falls onto a belt conveyor below the discharge port. However, in this sieving method where asphalt mixture is sieved and discharged simultaneously, due to the accumulation of asphalt mixture particles on the screen, some particles may not have time to contact the screen or may be discharged before being fully sieved. This results in low sieving accuracy and reduced particle grading, thus reducing the practicality of the asphalt mixture particle grading device. To address this problem, this invention proposes an asphalt mixture particle grading device to overcome the aforementioned technical problems in existing related technologies.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to an asphalt mixture particle grading device, comprising a screening box with a discharge port on its lower side. Vibrating frames are fixedly connected to both the left and right sides of the screening box. A first positioning box is fixedly connected to the left surface of the screening box. Two screening plates are disposed inside the screening box. An adjustment mechanism is disposed inside the first positioning box, and the two screening plates are fixedly connected to the adjustment mechanism. The adjustment mechanism can adjust the tilt angle of the screening plates. Two sets of support mechanisms are disposed on the front side of the screening box, which can support the corresponding screening plates. A second positioning box is fixedly connected to the rear surface of the screening box, and a tossing mechanism is disposed inside the second positioning box. The tossing mechanism can toss the asphalt mixture particles on the screening plates, thereby accelerating the screening of the asphalt mixture particles.

[0008] Furthermore, the adjustment mechanism includes two positioning grooves, which are formed on the front surface of the screening box and communicate with the interior of the screening box. The front sides of the two screening plates extend out of the front surface of the screening box through the two positioning grooves. The screen holes of the two screening plates are different in size, with the screen hole diameter of the upper screening plate being larger than that of the lower screening plate. The outer surfaces of the left and right sides of the screening plates are slidably connected to the inner walls of the left and right sides of the screening box. The screening plates are slidably connected to the corresponding positioning grooves. A vibration motor is fixedly installed on the outer surface of the screening box.

[0009] Furthermore, two rotating inner grooves are provided on the rear inner wall of the screening box. The rotating inner grooves extend out of the left and right outer surfaces of the screening box. A support rod is rotatably sleeved in each of the rotating inner grooves. The rear ends of the two screening plates are fixedly connected to the outer surfaces of the two support rods. The left ends of the support rods are rotatably inserted into the first positioning box. The left ends of the support rods are rotatably connected to the left inner wall of the first positioning box.

[0010] Furthermore, a first motor is fixedly connected to the upper surface of the first positioning box, and a first positioning rod is fixedly connected to the rotation output shaft of the first motor. The lower end of the first positioning rod rotatably penetrates into the first positioning box and is rotatably connected to the bottom wall of the first positioning box. Two worm gears are fixedly sleeved on the outer surface of the first positioning rod, and worm wheels are fixedly sleeved on the outer surfaces of the two support rods. The two worm wheels are meshed with the two worm gears, and the worm gears and worm wheels are all located inside the first positioning box.

[0011] Furthermore, the support mechanism includes two support blocks, which are fixedly connected to the outer surfaces of the left and right sides of the screening box. A bidirectional threaded rod is rotatably connected between the two support blocks. The left end of the bidirectional threaded rod rotatably passes through the left side surface of the support block located on the left side. Two vertical blocks are threadedly fitted on the outer surface of the bidirectional threaded rod. The rear surface of the vertical blocks is slidably connected to the front surface of the screening box. The two vertical blocks are located at the two opposite threads of the bidirectional threaded rod.

[0012] Furthermore, the actuating mechanism includes a second motor, which is fixedly connected to the upper surface of the second positioning box. The rotation output shaft of the second motor rotatably penetrates into the corresponding second positioning box. The rotation output shaft of the second motor is fixedly connected to a second positioning rod. The lower end of the second positioning rod is rotatably connected to the bottom wall of the second positioning box. Two first bevel gears are fixedly sleeved on the outer surface of the second positioning rod. Two threaded rods are rotatably connected between the inner walls of the front and rear sides of the screening box. The rear ends of the threaded rods rotatably penetrate into the second positioning box. The rear ends of the threaded rods are fixedly connected to a second bevel gear. The first bevel gears mesh with the corresponding second bevel gears.

[0013] Furthermore, two baffles are fixedly connected between the inner walls of the front and rear sides of the screening box. The baffles are in the shape of a "V" and are located above the corresponding threaded rods. Two limiting rods are fixedly connected between the inner walls of the front and rear sides of the screening box. An installation block is threadedly fitted on the outer surface of the threaded rod. The installation block is slidably fitted on the outer surface of the corresponding limiting rod. A connecting block is fixedly connected to the lower surface of the installation block. Multiple dispersing columns are fixedly connected to the lower surface of the connecting block.

[0014] The utility model has the following beneficial effects:

[0015] 1. The utility model can make the asphalt mixture particles be fully screened on the screening plate and then discharged from the screening box, so that the screening accuracy is higher, and then the accuracy of grading the asphalt mixture particles is improved, and further the practicability of the asphalt mixture particle grading device is increased.

[0016] 2. By discharging the asphalt mixture particles in three particle size grades respectively, the utility model helps to perform targeted treatment or use on asphalt mixtures with different particle sizes subsequently, meets different engineering requirements, and improves the practicability and flexibility of the asphalt mixture particle grading device.

[0017] 3. The utility model moves the dispersing column back and forth to stir the asphalt mixture particles on the screening plate, thereby driving the asphalt mixture particles to turn over. On the one hand, it avoids the accumulation of asphalt mixture particles, and on the other hand, it can accelerate the efficiency of grading the asphalt mixture particles, and further increase the practicability of the asphalt mixture particle grading device and improve the working efficiency of the asphalt mixture particle grading device.

[0018] 4. The "person" - shaped baffle of the utility model has a protective effect on the threaded rod, preventing asphalt mixture particles from directly falling on the outer surface of the threaded rod, and thus ensuring the stability of the threaded connection between the mounting block and the threaded rod.

[0019] Of course, it is not necessary for any product implementing the utility model to achieve all the above - mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following will briefly introduce the drawings required for describing the embodiments. Obviously, the drawings in the following description are only some embodiments of the utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 is the overall structural schematic diagram of the utility model;

[0022] Figure 2 is the structural schematic diagram of the second positioning rod of the utility model;

[0023] Figure 3 is the cross - sectional view of the screening box of the utility model;

[0024] Figure 4 is the structural schematic diagram of the second positioning box of the utility model;

[0025] Figure 5This is a vertical cross-sectional view of the screening box of this utility model;

[0026] Figure 6 This is a schematic diagram of the baffle structure of this utility model;

[0027] Figure 7 This is a schematic diagram of the sieve plate structure of this utility model.

[0028] The attached diagram lists the components represented by each number as follows:

[0029] 1. Screening box; 2. Vibrating frame; 3. Vibrating motor; 4. First positioning box; 5. Second positioning box; 6. Support rod; 7. Rotating inner groove; 8. Worm gear; 9. First positioning rod; 10. Worm; 11. First motor; 12. Screening plate; 13. Positioning groove; 14. Support block; 15. Bidirectional threaded rod; 16. Vertical block; 17. Second motor; 18. Second positioning rod; 19. First bevel gear; 20. Second bevel gear; 21. Baffle; 22. Threaded rod; 23. Limiting rod; 24. Connecting block; 25. Dispersing column; 26. Mounting block. Detailed Implementation

[0030] The technical solutions of the utility model embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, and not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the utility model.

[0031] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0032] Please see Figures 1-7As shown, this utility model is an asphalt mixture particle grading device, including a screening box 1. A discharge port is provided on the lower side of the screening box 1. Vibrating frames 2 are fixedly connected to both the left and right sides of the screening box 1. A first positioning box 4 is fixedly connected to the left surface of the screening box 1. Two screening plates 12 are provided inside the screening box 1. An adjustment mechanism is provided inside the first positioning box 4. The two screening plates 12 are fixedly connected to the adjustment mechanism, which can adjust the tilt angle of the screening plates 12. Two sets of support mechanisms are provided on the front side of the screening box 1, which can support the corresponding screening plates 12. A second positioning box 5 is fixedly connected to the rear surface of the screening box 1. A tossing mechanism is provided inside the second positioning box 5, which can toss the asphalt mixture particles on the screening plates 12, thereby accelerating the screening of the asphalt mixture particles.

[0033] In use, first activate the adjustment mechanism, which drives the screening plate 12 to rotate, thus adjusting the tilt angle of the screening plate 12. When the screening plate 12 rotates until its upper surface contacts the top wall of the positioning groove 13, and the front end of the screening plate 12 tilts slightly upward, rotate the support mechanism so that its upper surface contacts the lower surface of the screening plate 12. At this time, the support mechanism supports the front end of the screening plate 12, increasing its load-bearing capacity. Then, pour the asphalt mixture particles into the screening box 1 and use the two screening plates 12 for screening. Then, you can start the rotary switch. The mechanism uses a tossing mechanism to move back and forth to agitate the asphalt mixture particles, thereby causing the asphalt mixture particles to tumble and accelerating the efficiency of asphalt mixture particle grading. After the asphalt mixture particles on the screening plate 12 are screened, the support mechanism is rotated to release the support on the screening plate 12. Then, the adjustment mechanism is activated to drive the screening plate 12 to rotate until its lower surface contacts the bottom wall of the positioning groove 13. At this time, the front end of the screening plate 12 tilts downward, and the asphalt mixture particles can be discharged from the screening box 1 from the positioning groove 13, realizing the discharge of the screened asphalt mixture particles.

[0034] In one embodiment, the adjustment mechanism includes two positioning grooves 13, which are formed on the front surface of the screening box 1 and communicate with the interior of the screening box 1. The front sides of the two screening plates 12 extend out of the front surface of the screening box 1 through the two positioning grooves 13. The screen holes of the two screening plates 12 are different in size, with the screen hole diameter of the upper screening plate 12 being larger than that of the lower screening plate 12. The outer surfaces of the left and right sides of the screening plates 12 are slidably connected to the inner walls of the left and right sides of the screening box 1. The screening plates 12 are slidably connected to the corresponding positioning grooves 13. A vibration motor 3 is fixedly installed on the outer surface of the screening box 1.

[0035] The rear inner wall of the screening box 1 has two rotating inner grooves 7, which extend out of the left and right outer surfaces of the screening box 1. Each rotating inner groove 7 is fitted with a support rod 6. The rear ends of the two screening plates 12 are fixedly connected to the outer surfaces of the two support rods 6. The left ends of the support rods 6 are rotatably inserted into the first positioning box 4, and the left ends of the support rods 6 are rotatably connected to the left inner wall of the first positioning box 4.

[0036] A first motor 11 is fixedly connected to the upper surface of the first positioning box 4. A first positioning rod 9 is fixedly connected to the rotation output shaft of the first motor 11. The lower end of the first positioning rod 9 rotatably penetrates into the first positioning box 4 and is rotatably connected to the bottom wall of the first positioning box 4. Two worm gears 10 are fixedly sleeved on the outer surface of the first positioning rod 9. Worm wheels 8 are fixedly sleeved on the outer surfaces of the two support rods 6. The two worm wheels 8 are meshed with the two worm gears 10. The worm gears 10 and worm wheels 8 are both located inside the first positioning box 4.

[0037] Furthermore, in specific applications, when the vibration motor 3 is started, the vibration frame 2 and the vibration motor 3 work together to drive the screening box 1 to vibrate, thereby driving the screening plate 12 inside the screening box 1 to vibrate. When asphalt mixture particles are poured into the screening box 1, they will be graded and screened by the two screening plates 12, separating the asphalt mixture particles into three grades for screening. First, the asphalt mixture particles will undergo initial screening by the screening plate 12 located on the upper side, and then the asphalt mixture particles falling on the screening plate 12 located on the lower side will undergo secondary screening. Finally, the particle size of the asphalt mixture particles will be divided into three grades and discharged separately. This helps to carry out targeted treatment or use of asphalt mixtures with different particle sizes in the future, meet different engineering needs, and improve the practicality and flexibility of the asphalt mixture particle grading device.

[0038] When the first motor 11 is started, it drives the first positioning rod 9 to rotate. The rotation of the first positioning rod 9 synchronously drives the two worm gears 10 to rotate. The rotation of the worm gears 10 synchronously drives the corresponding worm wheel 8 and support rod 6 to rotate. During the rotation of the support rod 6, the screening plate 12 fixed on it rotates around the support rod 6 to adjust the tilt angle of the screening plate 12. In the initial state, the upper surface of the screening plate 12 is in contact with the top wall of the positioning groove 13. At this time, the front end of the screening plate 12 is slightly tilted upward. Because the front end of the screening plate 12 is tilted upward, the asphalt mixture particles falling on the screening plate 12 will not move forward and will be discharged from the positioning groove 13 into the screening box 1. Thus, they can be fully screened on the screening plate 12 before being discharged into the screening box 1, which makes the screening accuracy higher, thereby improving the accuracy of asphalt mixture particle grading and increasing the practicality of the asphalt mixture particle grading device.

[0039] After the asphalt mixture particles on the screening plate 12 are fully screened, the first motor 11 is started to drive the screening plate 12 to rotate around the support rod 6. This causes the front end of the screening plate 12 to tilt downwards. When the screening plate 12 rotates to the point where its lower surface contacts the bottom wall of the positioning groove 13, the asphalt mixture particles on the screening plate 12 will move from back to front during vibration until they are discharged from the screening box 1 through the positioning groove 13. This achieves the discharge of the graded asphalt mixture particles, which is convenient, quick, labor-saving, and more practical, thereby increasing the practicality of the asphalt mixture particle grading device.

[0040] In one embodiment, the support mechanism includes two support blocks 14, which are fixedly connected to the outer surfaces of the left and right sides of the screening box 1. A bidirectional threaded rod 15 is rotatably connected between the two support blocks 14. The left end of the bidirectional threaded rod 15 rotatably passes through the left side surface of the support block 14 located on the left side. Two vertical blocks 16 are threadedly fitted on the outer surface of the bidirectional threaded rod 15. The rear surface of the vertical blocks 16 is slidably connected to the front surface of the screening box 1. The two vertical blocks 16 are located at the two opposite threads of the bidirectional threaded rod 15.

[0041] When the bidirectional threaded rod 15 is rotated, it drives the two corresponding vertical blocks 16 to move in opposite or opposite directions. When the two vertical blocks 16 move in opposite directions to contact the two support blocks 14, the vertical blocks 16 will not obstruct the rotation of the screening plate 12. When the screening plate 12 rotates to contact the top wall of the positioning groove 13, the bidirectional threaded rod 15 is rotated to drive the two screening plates 12 to move relative to each other. During the relative movement of the two screening plates 12, they contact the lower surface of the positioning groove 13. At this time, the screening plate 12 supports the front side of the positioning groove 13, thereby ensuring the load-bearing capacity of the screening plate 12 and improving the practicality of the asphalt mixture particle grading device.

[0042] In one embodiment, the actuating mechanism includes a second motor 17, which is fixedly connected to the upper surface of the second positioning box 5. The rotation output shaft of the second motor 17 rotatably penetrates into the corresponding second positioning box 5. A second positioning rod 18 is fixedly connected to the rotation output shaft of the second motor 17. The lower end of the second positioning rod 18 is rotatably connected to the bottom wall of the second positioning box 5. Two first bevel gears 19 are fixedly sleeved on the outer surface of the second positioning rod 18. Two threaded rods 22 are rotatably connected between the inner walls of the front and rear sides of the screening box 1. The rear ends of the threaded rods 22 rotatably penetrate into the second positioning box 5. A second bevel gear 20 is fixedly connected to the rear ends of the threaded rods 22. The first bevel gears 19 mesh with the corresponding second bevel gears 20.

[0043] Both inner walls on the front and rear sides of the screening box 1 are fixedly connected with two baffles 21. The baffles 21 are in a "human" shape and are located above the corresponding threaded rods 22. Both inner walls on the front and rear sides of the screening box 1 are fixedly connected with two limiting rods 23. The outer surface of the threaded rod 22 is threadedly sleeved with an installation block 26. The installation block 26 is slidably sleeved on the outer surface of the corresponding limiting rod 23. The lower surface of the installation block 26 is fixedly connected with a connecting block 24. The lower surface of the connecting block 24 is fixedly connected with a plurality of dispersing columns 25.

[0044] When the second motor 17 is started, it can drive the second positioning rod 18 to rotate. The rotation of the second positioning rod 18 synchronously drives the two first bevel gears 19 to rotate. The rotation of the first bevel gears 19 synchronously drives the two second bevel gears 20 and the threaded rod 22 to rotate. The rotation of the threaded rod 22 drives the installation block 26 to move back and forth. During the back-and-forth movement of the installation block 26, the connecting block 24 and the dispersing columns 25 are synchronously driven to move back and forth. The back-and-forth movement of the dispersing columns 25 stirs the asphalt mixture particles on the screening plate 12, thereby driving the asphalt mixture particles to turn over. On the one hand, it avoids the accumulation of asphalt mixture particles. On the other hand, it can accelerate the efficiency of the classification of asphalt mixture particles, and further increase the practicability of the asphalt mixture particle classification device and improve the working efficiency of the asphalt mixture particle classification device.

[0045] In this solution, the limiting rod 23 has a limiting effect on the installation block 26, so that the installation block 26 can only move back and forth, avoiding shaking when the installation block 26 moves back and forth, and further ensuring the stability of the dispersing columns 25.

[0046] In this solution, the dispersing columns 25 can only turn over the asphalt mixture particles when the screening plate 12 rotates to make its upper surface contact with the top wall of the positioning groove 13.

[0047] In this solution, the support block 14 supports the screening plate 12 before the screening plate 12 performs screening.

[0048] In this solution, the "human" shape of the baffle 21 protects the threaded rod 22, preventing asphalt mixture particles from directly falling on the outer surface of the threaded rod 22, and further ensuring the stability of the threaded connection between the installation block 26 and the threaded rod 22.

[0049] In this solution, when the screening plate 12 rotates to make its upper surface contact with the top wall of the positioning groove 13, the inclination angle of the screening plate 12 is also relatively small, usually about ten degrees, and the specific inclination angle varies according to the actual situation.

[0050] In summary, with the help of the above-mentioned technical solution of this utility model, when the vibration motor 3 is started, the vibration frame 2 and the vibration motor 3 work together to drive the screening box 1 to vibrate, thereby also driving the screening plates 12 inside the screening box 1 to vibrate. When the asphalt mixture particles are poured into the screening box 1, they will be graded and screened by the two screening plates 12, separating the asphalt mixture particles into three grades for screening. First, the asphalt mixture particles will undergo initial screening by the upper screening plate 12, and then the asphalt mixture particles falling on the lower screening plate 12 will undergo secondary screening, finally separating the particle size of the asphalt mixture particles into three grades and discharging them separately. When the first motor 11 is activated, it drives the first positioning rod 9 to rotate. The rotation of the first positioning rod 9 synchronously drives the two worm gears 10 to rotate. The rotation of the worm gears 10 synchronously drives the corresponding worm wheels 8 and support rods 6 to rotate. During the rotation of the support rods 6, the screening plate 12 fixed to it rotates around the support rods 6, adjusting the tilt angle of the screening plate 12. Initially, the upper surface of the screening plate 12 is in contact with the top wall of the positioning groove 13. At this time, the front end of the screening plate 12 is slightly tilted upwards. Because the front end of the screening plate 12 is tilted upwards, the asphalt mixture particles falling onto the screening plate 12 will not move forward and will not be discharged from the positioning groove 13 into the screening box 1. The asphalt mixture particles are fully screened on the screening plate 12 before being discharged into the screening box 1, resulting in higher screening accuracy and improved grading precision. After the asphalt mixture particles on the screening plate 12 are fully screened, the first motor 11 is started to drive the screening plate 12 to rotate around the support rod 6, causing the front end of the screening plate 12 to tilt downwards. When the screening plate 12 rotates until its lower surface contacts the bottom wall of the positioning groove 13, the asphalt mixture particles on the screening plate 12 will move from back to front during vibration until they are discharged from the positioning groove 13 into the screening box 1, thus realizing the discharge of the graded asphalt mixture particles. The second motor 17 can drive the second positioning rod 18 to rotate. The rotation of the second positioning rod 18 synchronously drives the two first bevel gears 19 to rotate. The rotation of the first bevel gears 19 synchronously drives the two second bevel gears 20 and the threaded rod 22 to rotate. The rotation of the threaded rod 22 drives the mounting block 26 to move back and forth. During the back and forth movement of the mounting block 26, the connecting block 24 and the dispersing column 25 are synchronously moved back and forth. The back and forth movement of the dispersing column 25 moves the asphalt mixture particles on the screening plate 12, thereby causing the asphalt mixture particles to turn over. On the one hand, this avoids the accumulation of asphalt mixture particles, and on the other hand, it can accelerate the efficiency of asphalt mixture particle grading.

[0051] Through the above technical solution, 1. the asphalt mixture particles can be fully screened on the screening plate 12 before being discharged into the screening box 1, which makes the screening accuracy higher, thereby improving the accuracy of asphalt mixture particle grading and increasing the practicality of the asphalt mixture particle grading device.

[0052] 2. By classifying asphalt mixture particles into three grades and discharging them separately, it is helpful to carry out targeted treatment or use of asphalt mixtures with different particle sizes in the subsequent process, meet different engineering needs, and improve the practicality and flexibility of the asphalt mixture particle grading device.

[0053] 3. The asphalt mixture particles on the screening plate 12 are agitated by the back-and-forth movement of the dispersion column 25, thereby causing the asphalt mixture particles to turn over. On the one hand, this avoids the accumulation of asphalt mixture particles, and on the other hand, it can speed up the grading efficiency of asphalt mixture particles, thereby increasing the practicality of the asphalt mixture particle grading device and improving the working efficiency of the asphalt mixture particle grading device.

[0054] 4. The baffle 21, in a "V" shape, protects the threaded rod 22, preventing asphalt mixture particles from falling directly onto the outer surface of the threaded rod 22, thereby ensuring the stability of the threaded connection between the mounting block 26 and the threaded rod 22.

[0055] 5. During the relative movement of the two screening plates 12, they come into contact with the lower surface of the positioning groove 13. At this time, the screening plates 12 support the front side of the positioning groove 13, thereby ensuring the load-bearing capacity of the screening plates 12 and improving the practicality of the asphalt mixture particle grading device.

[0056] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0057] The preferred embodiments of the utility model disclosed above are merely illustrative of the utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the utility model, thereby enabling those skilled in the art to better understand and utilize it. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An asphalt mixture particle grading device, comprising a screening box (1), characterized in that, The screening box (1) has a discharge port on its lower side. Vibration frames (2) are fixedly connected to both the left and right sides of the screening box (1). A first positioning box (4) is fixedly connected to the left side surface of the screening box (1). Two screening plates (12) are provided inside the screening box (1). An adjustment mechanism is provided inside the first positioning box (4). The two screening plates (12) are fixedly connected to the adjustment mechanism. The adjustment mechanism can adjust the tilt angle of the screening plates (12). Two sets of support mechanisms are provided on the front side of the screening box (1). The support mechanisms can support the corresponding screening plates (12). A second positioning box (5) is fixedly connected to the rear surface of the screening box (1). A toggle mechanism is provided inside the second positioning box (5). The toggle mechanism can toggle the asphalt mixture particles on the screening plates (12), thereby accelerating the screening of asphalt mixture particles.

2. The asphalt mixture particle grading device according to claim 1, characterized in that, The adjustment mechanism includes two positioning grooves (13), which are formed on the front surface of the screening box (1). The positioning grooves (13) communicate with the interior of the screening box (1). The front sides of the two screening plates (12) extend out of the front surface of the screening box (1) through the two positioning grooves (13). The screen holes of the two screening plates (12) are different in size. The screen hole diameter of the upper screening plate (12) is larger than that of the lower screening plate (12). The outer surfaces of the left and right sides of the screening plates (12) are slidably connected to the inner walls of the left and right sides of the screening box (1). The screening plates (12) are slidably connected to the corresponding positioning grooves (13). A vibration motor (3) is fixedly installed on the outer surface of the screening box (1).

3. The asphalt mixture particle grading device according to claim 2, characterized in that, The rear inner wall of the screening box (1) has two rotating inner grooves (7). The rotating inner grooves (7) extend out of the left and right outer surfaces of the screening box (1). A support rod (6) is rotatably sleeved in each of the rotating inner grooves (7). The rear ends of the two screening plates (12) are fixedly connected to the outer surfaces of the two support rods (6). The left ends of the support rods (6) are rotatably inserted into the first positioning box (4). The left ends of the support rods (6) are rotatably connected to the left inner wall of the first positioning box (4).

4. The asphalt mixture particle grading device according to claim 3, characterized in that, A first motor (11) is fixedly connected to the upper surface of the first positioning box (4). A first positioning rod (9) is fixedly connected to the rotation output shaft of the first motor (11). The lower end of the first positioning rod (9) rotates through into the first positioning box (4) and rotates to connect with the bottom wall of the first positioning box (4). Two worm gears (10) are fixedly sleeved on the outer surface of the first positioning rod (9). Worm wheels (8) are fixedly sleeved on the outer surfaces of the two support rods (6). The two worm wheels (8) mesh with the two worm gears (10). The worm gears (10) and worm wheels (8) are both located inside the first positioning box (4).

5. The asphalt mixture particle grading device according to claim 1, characterized in that, The support mechanism includes two support blocks (14), and the two support blocks (14) are fixedly connected to the outer surfaces on the left and right sides of the screening box (1). A bidirectional threaded rod (15) is rotatably connected between the two support blocks (14). The left end of the bidirectional threaded rod (15) rotatably penetrates through the left surface of the support block (14) on the left side. Two vertical blocks (16) are threadedly sleeved on the outer surface of the bidirectional threaded rod (15). The rear surface of the vertical block (16) is slidably connected to the front surface of the screening box (1). The two vertical blocks (16) are located at two opposite threaded portions of the bidirectional threaded rod (15).

6. The asphalt mixture particle grading device according to claim 1, characterized in that, The拨动机构 includes a second motor (17). The second motor (17) is fixedly connected to the upper surface of the second positioning box (5). The rotating output shaft of the second motor (17) rotatably penetrates into the corresponding second positioning box (5). The rotating output shaft of the second motor (17) is fixedly connected to a second positioning rod (18). The lower end of the second positioning rod (18) is rotatably connected to the bottom wall of the second positioning box (5). Two first bevel gears (19) are fixedly sleeved on the outer surface of the second positioning rod (18). Two threaded rods (22) are rotatably connected between the front and rear inner walls of the screening box (1). The rear ends of the threaded rods (22) rotatably penetrate into the second positioning box (5). Second bevel gears (20) are fixedly connected to the rear ends of the threaded rods (22). The first bevel gear (19) is meshed with the corresponding second bevel gear (20).

7. The asphalt mixture particle grading device according to claim 6, characterized in that, Two baffles (21) are fixedly connected between the front and rear inner walls of the screening box (1). The baffle (21) is in the shape of a "person". The baffle (21) is located above the corresponding threaded rod (22). Two limiting rods (23) are fixedly connected between the front and rear inner walls of the screening box (1). An installation block (26) is threadedly sleeved on the outer surface of the threaded rod (22). The installation block (26) is slidably sleeved on the outer surface of the corresponding limiting rod (23). A connecting block (24) is fixedly connected to the lower surface of the installation block (26). A plurality of dispersion columns (25) are fixedly connected to the lower surface of the connecting block (24). It should be noted that there is an unclear term "拨动机构" in the original text. I have translated it as "拨动机构" for now. You may need to clarify this term for a more accurate translation.

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