A mixing system and spray mixing method for asphalt mixtures

Abstract

The application discloses a kind of asphalt mixture mixing system and spraying mixing method, belong to asphalt mixing technical field.It includes successively arranged screening device, spraying device and mixing device, the screening device is used to screen aggregate, the spraying device is used to spray asphalt on aggregate, the mixing device is used to fully mix aggregate, filler and asphalt, the screening device includes symmetrically arranged fixed frame, the upper portion of fixed frame is provided with sieve plate, the four corners of sieve plate are provided with supporting spring, the supporting spring connects sieve plate on fixed frame, sieve plate is provided with a plurality of sieve holes, symmetrically provided with mounting plate on the two side surfaces of sieve plate, the mounting plate is provided with pulley mechanism, and the pulley mechanism includes driving belt.The technical scheme is used to solve the problem that sieve hole of screening device is easily blocked by aggregate during aggregate screening process, which affects the efficiency of asphalt mixing.

Description

Technical Field

[0001] This invention belongs to the field of asphalt mixing technology, specifically relating to an asphalt mixture mixing system and a spray mixing method. Background Technology

[0002] The five-step loading method for asphalt mixing plants is a common technology for asphalt mixture production. By strictly controlling and managing various aspects such as the aggregate-asphalt mixing ratio, spraying and mixing asphalt, heating and stirring the mixture, and quality control, high-performance asphalt mixtures with stable quality, long service life, and wide applicability can be produced.

[0003] Preparing the aggregate is the first step in producing high-quality asphalt mixtures. The aggregate must first be screened to ensure that particles of the same size are mixed together. The aggregate also needs to be sorted according to different sizes to ensure that the correct sized mixture is produced. For aggregates containing stones, washing and screening are necessary to ensure that no foreign matter is present in the mixture.

[0004] There are many existing aggregate screening devices, the most widely used of which is to screen aggregates through sieve holes. Although this type of device has a simple structure and high screening efficiency, the sieve holes are prone to clogging during the aggregate screening process, which in turn affects the mixing efficiency and quality of asphalt. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a mixing system and spray mixing method for asphalt mixtures, so as to solve the problem that the screen holes of the screening device are easily blocked by aggregates during the aggregate screening process, which affects the efficiency and quality of asphalt mixing.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This invention discloses an asphalt mixture mixing system, comprising a screening device, a spraying device, and a mixing device arranged sequentially. The screening device is used to screen aggregates, the spraying device is used to spray asphalt onto the aggregates, and the mixing device is used to thoroughly mix the aggregates, fillers, and asphalt. The screening device includes symmetrically arranged fixed frames, a screen plate is provided above the fixed frames, and support springs are provided at the four corners of the screen plate to connect the screen plate to the fixed frames. The screen plate has a plurality of screen holes, and mounting plates are symmetrically arranged on both sides of the screen plate. Each mounting plate is equipped with a pulley mechanism, which includes a drive belt. Each drive belt, symmetrically arranged, has mounting blocks on its lower side surface. Each mounting block has a sliding rod, and the portion of the sliding rod below the screen plate has a sleeve. The sleeve is rotatably connected to the sliding rod. Both ends of the sleeve have return springs, which are respectively connected to the sleeve and the mounting block. Several push rods are provided on the side of the sleeve facing the screen plate. The diameter of the push rods is smaller than the diameter of the screen holes. The mounting plate also has a vibration mechanism for driving the screen plate to vibrate.

[0008] Furthermore, the mounting block is provided with a slide rail perpendicular to the sieve plate, and the end of the slide rod is slidably connected to the slide rail. The mounting block is also provided with a telescopic spring, one end of which is connected to the end of the slide rod, and the other end is fixed to the mounting block.

[0009] Furthermore, the mounting plate is provided with a wavy guide plate, which is in contact with the surface of the sleeve.

[0010] Furthermore, the pulley mechanism also includes a pulley, a rotating shaft, and a drive motor. The drive belt is wound around the pulley, and the two ends of the rotating shaft are respectively connected to a pulley disposed opposite to each other. The output end of the drive motor is fixed to the rotating shaft.

[0011] Furthermore, a connecting frame is provided on the upper side of the drive belt. The connecting frame is located above the screen plate. Several first connecting blocks are provided on the side of the connecting frame facing the screen plate. One end of the first connecting block is fixed to the connecting frame. A second connecting block is provided on the other end of the first connecting block and rotatedly connected thereto. A stop block is provided on the side of the first connecting block to restrict the rotation direction of the second connecting block.

[0012] Furthermore, the spraying device includes an inclined plate disposed below the sieve plate, a plurality of spray pipes disposed above the inclined plate, the spraying direction of the spray pipes pointing towards the surface of the inclined plate, a plurality of permeation holes disposed at the lower end of the inclined plate, a heating mechanism disposed on the back of the inclined plate, an inclined guide plate disposed on the lower surface of the permeation holes, and a collection tank disposed below the guide plate.

[0013] Furthermore, the inclined plate is provided with several vertical bends.

[0014] Furthermore, a hopper is provided above the higher end of the inclined plate, the upper end of the hopper is located directly below the screen plate, and the lower end of the hopper has a rectangular cross-section and is located above the higher end of the inclined plate.

[0015] Furthermore, the following steps are included:

[0016] S1. The collecting hopper collects aggregates that meet the usage requirements screened out by the screening device;

[0017] S2. The lower part of the hopper discharges the aggregate in a straight line to the upper end of the inclined plate;

[0018] S3. Under the influence of gravity, the aggregate gradually rolls from the top of the inclined plate downwards.

[0019] S4. The spray pipe sprays asphalt onto the aggregate during the aggregate rolling process;

[0020] S5. After spraying, the aggregate is discharged from the lower end of the inclined plate into the mixing device, and the asphalt on the inclined plate that is not adhered to the aggregate is discharged from the permeation hole into the collection tank.

[0021] The beneficial effects of this invention are as follows:

[0022] (1) In the screening device, under the action of the belt pulley mechanism, the top rod can continuously circulate under the screen plate, which can clean the screen holes of the screen plate repeatedly. Moreover, the cleaning is carried out during the working process of the screen plate, which ensures the screening state of the screen plate and does not require stopping the machine to clean the screen plate, thus improving the screening efficiency.

[0023] (2) The spraying mechanism mainly utilizes the gravity of the aggregate to roll down the inclined plate, that is, spraying the aggregate with asphalt during the rolling process, so that the surface of the aggregate can be sprayed evenly and comprehensively, ensuring the effect of asphalt spraying on the aggregate.

[0024] (3) The spraying mixing method in this technical solution utilizes the rolling of aggregates under gravity to achieve spraying during rolling, which can greatly improve the coverage of asphalt on the surface of aggregates, and thus greatly improve the subsequent mixing and penetration effect of asphalt and aggregates.

[0025] Other advantages, objectives, and features of the invention will be set forth in the following description and will be apparent to those skilled in the art in some respects, or may be learned by practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0026] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration:

[0027] Figure 1 This is a three-dimensional schematic diagram of the asphalt mixture mixing system of the present invention;

[0028] Figure 2 This is a three-dimensional schematic diagram of the asphalt mixture mixing system of the present invention from another perspective;

[0029] Figure 3 This is a schematic cross-sectional view of the asphalt mixture mixing system of the present invention.

[0030] Figure 4 This is a three-dimensional schematic diagram of the screening device in the asphalt mixture mixing system of the present invention;

[0031] Figure 5 for Figure 1 A magnified view of a portion of point A in the middle.

[0032] The following labels are shown in the attached diagram:

[0033] 1. Screen plate; 2. Mounting plate; 3. Drive belt; 4. Pulley; 5. Drive motor; 6. Mounting block; 7. Slide rail; 8. Slide rod; 9. Sleeve; 10. Top rod; 11. End plate; 12. Return spring; 13. Guide plate; 14. Connecting part; 15. Support spring; 16. Fixing frame; 17. Fixing seat; 18. Vibrating motor; 19. Sealing plate; 20. Inclined plate; 21. Spray pipe; 22. Permeation hole; 23. Guide plate; 24. Collection tank; 25. Connecting frame; 26. First connecting block; 27. Second connecting block; 28. Stop block; 29. ​​Collection hopper; 30. Telescopic spring; 31. Bending part; 32. Screen hole. Detailed Implementation

[0034] like Figures 1-5As shown, the present invention discloses an asphalt mixture mixing system, comprising a screening device, a spraying device, and a mixing device arranged sequentially. The screening device is used to screen aggregates, the spraying device is used to spray asphalt onto the aggregates, and the mixing device is used to fully mix aggregates, fillers, and asphalt. The screening device includes symmetrically arranged fixed frames 16, with a screen plate 1 above the fixed frames 16. Support springs 15 are provided at the four corners of the screen plate 1, and the support springs 15 fix the screen plate 1 to the fixed frames 16. The screen plate 1 has a plurality of screen holes 32, the diameter of which is set according to the size of the required aggregate (asphalt aggregate). Mounting plates 2 are symmetrically arranged on both sides of the screen plate 1. The mounting plates 2 have connecting parts 14 at the ends of the support springs 15, and the ends of the support springs 15 are fixed to the connecting parts 14. Each mounting plate 2 is provided with a pulley mechanism, which includes a drive belt 3. The symmetrically arranged drive belts 3 are located on the lower side surface. Each mounting plate 2 is equipped with a mounting block 6, which is clamped and fixed to the drive belt 3. A slide rod 8 is provided on the mounting block 6, which is parallel to the screen plate 1. The part of the slide rod 8 located below the screen plate 1 is provided with a sleeve 9, which is rotatably connected to the slide rod 8. The two ends of the sleeve 9 are provided with return springs 12, which are respectively connected to the sleeve 9 and the mounting block 2. Specifically, an end plate 11 is provided on the mounting block 2, and one end of the return spring 12 is fixed to the end plate 11, preferably at an angle. Several top rods 10 are provided on the side of the sleeve 9 facing the screen plate 1. The diameter of the top rods 10 is smaller than the diameter of the screen holes 32. The mounting plate 2 is also provided with a vibration mechanism for driving the screen plate 1 to vibrate. The vibration mechanism includes a fixed seat 17 and a vibration motor 18. The fixed seat 17 is fixed to the mounting plate 2, and the motor is fixed to the fixed seat 17. It should be noted that the screen holes 32 are arranged in multiple rows, and the number of screen holes 32 in each row is the same as the number of top rods 10.

[0035] The working principle of the above-mentioned screening device to prevent clogging is as follows:

[0036] When the screen plate 1 is screening, the belt of the pulley mechanism rotates. The rotation of the belt drives the mounting block 6 mounted on it to move from one end of the screen plate 1 to the other, which in turn drives the sleeve 9 to move, and consequently, the push rod 10 on the sleeve 9 to move. It should be noted that the preferred length of the push rod 10 is the distance between the surface of the sleeve 9 and the upper surface of the screen plate 1 (because the screen holes 32 have thickness). When the push rod 10 moves, because its length is greater than the width between the sleeve 9 and the lower surface of the screen plate 1, it will encounter resistance during movement. Under the action of force, the sleeve 9 rotates due to the force of the reset spring 12, that is, the push rod 10 will tilt to avoid it. When the push rod 10 moves to the bottom of the screen hole 32, the push rod 10 loses the force of the screen plate 1 and will reset under the action of the reset spring 12. That is, during the reset process, the push rod 10 will push the aggregate stuck in the screen hole 32 upwards, and then continue to move towards the end of the screen plate 1. When it moves to the other end, it will return to the starting position by moving in the opposite direction through the drive belt 3. This cycle solves the problem of screen hole 32 blockage.

[0037] In the above technical solution, under the action of the pulley mechanism, the top rod 10 can continuously circulate below the screen plate 1, which can reciprocate to clean the screen holes 32 of the screen plate 1. Moreover, the cleaning is carried out during the working process of the screen plate 1, which not only ensures the screening state of the screen plate 1, but also eliminates the need to stop the machine to clean the screen plate 1, thus improving the screening efficiency.

[0038] In one feasible embodiment, the mounting block 6 is provided with a slide rail 7 perpendicular to the screen plate 1. The slide rail 7 refers to a through groove provided on the mounting block 6. The end of the slide rod 8 is slidably connected to the slide rail 7. The mounting block 6 is also provided with a telescopic spring 30. One end of the telescopic spring 30 is connected to the end of the slide rod 8, and the other end is fixed to the mounting block 6. The advantage of this arrangement is that when the push rod 10 is subjected to force, it will press the telescopic spring 30 downward, that is, the telescopic spring 30 is compressed. When the push rod 10 moves to below the screen hole 32, it loses the contact with the screen plate 1. At this time, the telescopic spring 30 will quickly return to its original position, that is, give the push rod 10 an initial upward velocity. Even if the push rod 10 has a greater impact force, it can push out and clean the aggregate stuck in the screen hole 32.

[0039] In one feasible embodiment, the mounting plate 2 is provided with a wavy guide plate 13, which is in contact with the surface of the sleeve 9. The guide plate 13 is provided with several grooves and protrusions, and the grooves correspond to the positions of the through holes in each row of through holes. That is, when the sleeve 9 moves into the groove, it can move upward and abut against the groove under the action of the telescopic spring 30, thereby realizing the upward movement of the push rod 10 and acting on the screen hole 32. When the sleeve 9 moves to the protrusion, the position of the sleeve 9 is lowered, and the push rod 10 will disengage from the screen hole 32. The setting of the guide plate 13 limits the up and down movement path of the sleeve 9, so that even if the movement trajectory of the push rod 10 is more precise, the problem of the push rod 10 tilting due to shaking or other reasons and failing to accurately enter the screen hole 32 will not be solved.

[0040] Of course, the depth of the groove and the height of the protrusion can be set according to the actual situation. Preferably, when the sleeve 9 is on the protrusion, the push rod 10 is disengaged from the lower surface of the screen plate 1. When the sleeve 9 is in the groove, the push rod 10 enters the screen hole. It should be noted that when the gap between the push rod 10 and the lower surface of the screen plate 1 enters the aggregate, it is easy to be stuck by the aggregate. The setting of the sleeve 9 and the return spring 12 here will cause the sleeve 9 to rotate to avoid the position of the aggregate and prevent the movement from getting stuck. Of course, if the problem of getting stuck is ignored and the guiding accuracy is further improved (under the action of friction, the sleeve 9 may rotate with the guide plate 13, which will cause the position of the push rod 10 to deflect to a certain extent), then the slide rod 8 can be in contact with the guide plate 13, or the sleeve 9 and the return spring 12 can be directly removed, and the push rod 10 can be directly set on the slide rod 8. The slide rod 8 slides on the mounting block 6. At this time, the slide rod 8 only slides up and down and does not rotate.

[0041] In one feasible embodiment, the pulley mechanism further includes a pulley 4, a rotating shaft, and a drive motor 5. The drive belt 3 is wound around the pulley 4, and the two ends of the rotating shaft are respectively connected to a pulley 4 disposed opposite to each other. The output end of the drive motor 5 is fixed to the rotating shaft. The structure of the pulley 4 is prior art and will not be described in detail here. Of course, the side surface of the drive belt 3 located below refers to the part located below the pulley 4, and the same applies to the side surface located below.

[0042] In one feasible embodiment, a connecting frame 25 is provided on the upper side of the drive belt 3, and the connecting frame 25 is located above the screen plate 1. Several first connecting blocks 26 are provided on the side of the connecting frame 25 facing the screen plate 1. One end of each first connecting block 26 is fixed to the connecting frame 25, and a second connecting block 27 is rotatably connected to the other end of each first connecting block 26. A stop block 28 is provided on the side of each first connecting block 26 to restrict the rotation direction of the second connecting block 27. The movement of the drive belt 3 will drive the mounting frame to move, thus causing the second connecting block 27 to sweep across the screen plate 1. It should be noted that there is a certain distance between the end of the second connecting block 27 and the screen plate 1. The distance can be adjusted according to the particle size of the standard aggregate. That is, during the movement, only a small amount of standard aggregate will be pushed to the end of the screen plate 1 for discharge, while the larger aggregate will contact the end of the second connecting plate and be discharged from the surface of the screen plate 1 under the push of the second connecting plate. The function of the stop block 28 is to restrict the rotation direction of the second connecting block 27. That is, the second connecting block 27 cannot rotate when pushing the aggregate, forming a rigid push for the aggregate to move. During the return stroke, it can rotate and avoid the aggregate by contacting it, thus preventing the aggregate from being pushed to the other end of the screen plate 1 (because in this technical solution, a spray device is provided below the other end, making it difficult to set up a collection structure for the aggregate).

[0043] In the asphalt mixing process, spraying the mixed asphalt is also involved. This mainly involves evenly spraying the mixed asphalt onto the aggregates, ensuring that the asphalt is sprayed onto all surfaces of the aggregates. This allows the asphalt to penetrate into the aggregates or adhere to their surfaces, guaranteeing the adhesion between the aggregates during later mixing. The quality of the mixed asphalt and the uniformity of the spraying are key factors affecting the quality and service life of the mixture. Therefore, this technical solution's mixing system also includes a spraying device for spraying.

[0044] Specifically, the spraying device includes an inclined plate 20 positioned below the sieve plate 1. Two sealing plates 19 are provided on both sides of the inclined plate 20, fixed to the sides of the inclined plate 20. Preferably, the sealing plates 19 are fixed to a fixing frame 16. Several spray pipes 21 are positioned above the inclined plate 20, preferably at equal heights to the surface of the inclined plate 20. The spraying direction of the spray pipes 21 points towards the surface of the inclined plate 20. Several permeation holes 22 are provided at the lower end of the inclined plate 20. An inclined guide plate 23 is provided on the lower surface of the permeation holes 22. A collection tank 24 is located below the guide plate 23. The spraying mechanism primarily utilizes the gravity of the aggregate to roll downwards on the inclined plate 20, spraying asphalt onto the aggregate during its rolling process. This ensures uniform and comprehensive spraying of the aggregate surface, guaranteeing the effectiveness of the asphalt spraying on the aggregate (if the aggregate does not roll, it can only be sprayed on the upper surface, and the lower surface cannot be sprayed). (Spraying), while the asphalt on the inclined plate 20 flows downward and is discharged from the permeation hole 22 into the collection tank 24, which is convenient for subsequent treatment and recycling. Of course, it should be noted that other spraying structures should also be set at the end of the spray pipe 21, such as liquid pumps and asphalt heating devices, which are existing technologies and will not be elaborated on here. In order to further explain this solution, it should also be noted that in the existing technology, liquid petroleum asphalt has low viscosity and good fluidity. When applied to concrete, mortar or wood substrates, it can quickly penetrate into the pores of the base layer. After the solvent evaporates, it will firmly bond with the base surface. Therefore, there will be no problem of aggregate not being able to move after spraying liquid asphalt on the screen plate 1. Of course, if the liquid asphalt will solidify on the inclined plate 20, it is preferable to set a heating mechanism on the inclined plate 20. The heating mechanism can be a heating element such as an electric heating wire to avoid the problem of the asphalt solidifying and increasing viscosity, which would prevent the aggregate from rolling.

[0045] In one feasible method, the inclined plate 20 is provided with several vertical bends 31. The vertical bends 31 are provided so that the aggregate falls from a higher position to a lower position. During the falling process, not only can some of the accumulated aggregate be dispersed, but also some flat aggregate that can slide on the inclined plate 20 but cannot roll on the inclined plate 20 can be flipped over, thereby further improving the spraying coverage effect on the aggregate.

[0046] In one feasible embodiment, a hopper 29 is provided above the higher end of the inclined plate 20. The upper end of the hopper 29 is located directly below the screen plate 1. The lower end of the hopper 29 has a rectangular cross-section and is located above the higher end of the inclined plate 20. The lower part of the hopper 29 is provided with a rectangular outlet. The width of the rectangular outlet can be slightly larger than the particle size of the aggregate to be used by 1-2 cm. This allows the aggregate to be discharged slowly and evenly onto the inclined plate 20 to a certain extent, avoiding the problem of large accumulation thickness of discharged aggregate. At the same time, under the action of the vibrating motor, the discharge of the hopper 29 will not be blocked, and it can also help the movement of the aggregate on the inclined plate 20 to a certain extent.

[0047] In one feasible embodiment, a spraying method for asphalt mixtures is also disclosed, which is based on a spraying device and includes the following steps:

[0048] S1, hopper 29 collects aggregates that meet the usage requirements screened out by the screening device;

[0049] S2. The lower part of the collecting hopper 29 discharges the aggregate in a straight line to the upper end of the inclined plate 20;

[0050] S3. Under the influence of gravity, the aggregate gradually rolls from the top of the inclined plate 20 downwards.

[0051] S4, spray pipe 21 sprays asphalt onto the aggregate during the aggregate rolling process;

[0052] S5. After spraying, the aggregate is discharged from the lower end of the inclined plate 20 into the mixing device, and the asphalt that is not adhered to the aggregate on the inclined plate 20 is discharged from the permeation hole 22 into the collection pool 24.

[0053] This spraying method utilizes the rolling of aggregates under gravity to achieve spraying during rolling, which can greatly improve the coverage of asphalt on the surface of aggregates, thereby greatly improving the subsequent mixing and penetration effect of asphalt and aggregates.

[0054] The screening device, spraying device, and mixing device (common mixing devices in existing technologies) arranged sequentially in this technical solution can work simultaneously to screen, spray, and mix asphalt mixtures, thereby greatly improving the mixing efficiency of asphalt mixtures.

[0055] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. An asphalt mixture mixing system, comprising a screening device, a spraying device, and a mixing device arranged sequentially, wherein the screening device is used to screen aggregates, the spraying device is used to spray asphalt onto the aggregates, and the mixing device is used to thoroughly mix the aggregates, fillers, and asphalt; characterized in that: The screening device comprises symmetrically arranged fixing frames, a screen plate is arranged above the fixing frames, supporting springs are arranged at the four corners of the screen plate, the supporting springs connect the screen plate to the fixing frames, a plurality of screen holes are arranged on the screen plate, symmetrically arranged installation plates are arranged on the two side surfaces of the screen plate, a belt pulley mechanism is arranged on each installation plate, the belt pulley mechanism comprises a driving belt, symmetrically arranged driving belts are arranged on the lower side surfaces of the installation plates, an installation block is arranged on each driving belt, a sliding rod is arranged on the installation block, a sleeve is arranged on the part of the sliding rod below the screen plate, the sleeve is rotationally connected to the sliding rod, reset springs are arranged at the two ends of the sleeve, the two ends of the reset springs are respectively connected to the sleeve and the installation block, a plurality of jacks are arranged on the side surface of the sleeve facing the screen plate, the diameters of the jacks are smaller than the diameters of the screen holes, and a vibrating mechanism for driving the screen plate to vibrate is further arranged on the installation plate. A slide is arranged on the installation block and is perpendicular to the screen plate, the end of the sliding rod is slidingly connected to the slide, an extension spring is further arranged on the installation block, one end of the extension spring is connected to the end of the sliding rod, and the other end of the extension spring is fixed to the installation block; a wave-shaped guide plate is arranged on the installation plate and is in contact with the surface of the sleeve; the belt pulley mechanism further comprises a belt pulley, a rotating shaft and a driving motor, the driving belt is wound around the belt pulley, the two ends of the rotating shaft are respectively connected to the belt pulleys arranged opposite to each other, and the output end of the driving motor is fixed to the rotating shaft; a connecting frame is arranged on the side of the driving belt above the screen plate, the connecting frame is above the screen plate, a plurality of first connecting blocks are arranged on the side of the connecting frame facing the screen plate, one end of each first connecting block is fixed to the connecting frame, a second connecting block is rotationally connected to the other end of each first connecting block, and a stop block is arranged on the side surface of each first connecting block to limit the rotation direction of the second connecting block.

2. An asphalt mixture mixing system according to claim 1, characterized in that: The spraying device comprises an inclined plate arranged below the screen plate, a plurality of spraying pipes are arranged above the inclined plate, the spraying directions of the spraying pipes are directed to the surface of the inclined plate, a plurality of permeation holes are arranged at the end of the lower part of the inclined plate, a heating mechanism is arranged on the back surface of the inclined plate, an inclined flow guide plate is arranged on the lower surface of the permeation hole, and a collection pool is arranged below the flow guide plate.

3. An asphalt mixture mixing system according to claim 2, wherein: A plurality of vertical bending parts are arranged on the inclined plate.

4. An asphalt mixture mixing system according to claim 2, wherein: A material collecting hopper is arranged above the end of the higher part of the inclined plate, the upper end of the material collecting hopper is directly below the screen plate, and the lower end of the material collecting hopper is in a rectangular cross section and is above the end of the higher part of the inclined plate.

5. A spray mix method of an asphalt mixture according to any one of claims 1 to 4, characterized in that: The method comprises the following steps: S1, the material collecting hopper collects the aggregate meeting the use requirements screened by the screening device; S2, the lower part of the material collecting hopper discharges the aggregate in a straight line to the upper end of the inclined plate; S3, the aggregate gradually rolls from the upper end to the lower end of the inclined plate under the action of gravity; S4, the spraying pipes spray asphalt on the aggregate during the rolling process of the aggregate; S5, the aggregate after the spraying is discharged from the lower end of the inclined plate to the mixing device, and the asphalt not adhered to the aggregate on the inclined plate is discharged from the permeation holes to the collection pool.

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