Cold-mixed and cold-laid ultra-thin overlay asphalt mixture preparation process and device thereof

Abstract

This invention discloses a process and apparatus for preparing cold-mixed, cold-laid, ultra-thin overlay asphalt mixtures, relating to the field of asphalt mixture preparation technology. It includes a segmented modification tank, a filter box, and a filtration mechanism. The filtration mechanism comprises a conveyor belt filter screen, a first connecting box, a second connecting box, baffles, a connecting belt, and a first synchronous belt structure. Through the segmented modification tank and filtration mechanism, the pretreatment tank, reaction tank, and maturation tank work together to process the raw materials in segments, enhancing the interfacial bonding between the modifier and the raw materials, avoiding uneven modification effects, and reducing the generation of incompletely reacted modifier particles. The filter box, conveyor belt filter screen, first connecting box, second connecting box, and baffle work together to remove incompletely reacted modifier particles. The feeding box and collecting box work together to collect the incompletely reacted modifier particles.

Description

Technical Field

[0001] This invention belongs to the field of asphalt mixture preparation technology, specifically a process and apparatus for preparing cold-mixed and cold-laid ultra-thin overlay asphalt mixture. Background Technology

[0002] Asphalt mixture is a composite material made by mixing mineral aggregates (coarse aggregates, fine aggregates, and mineral powder) with asphalt binder in a certain proportion. It is the core material of modern road pavement, and its performance can be greatly improved through material modification and process optimization. Cold-mixed cold-laid ultra-thin overlay asphalt mixture is an ultra-thin composite material that can be mixed and laid at room temperature and is specially used for functional repair or preventive maintenance of road surfaces. The fundamental difference between cold-mixed cold-laid ultra-thin overlay asphalt mixture and traditional hot-mix asphalt mixture is that it does not require high-temperature heating of asphalt and mineral aggregates, thus achieving significant energy saving, emission reduction, and construction convenience.

[0003] In the preparation process and equipment of cold-mixed and cold-laid ultra-thin overlay asphalt mixture, the raw materials are usually modified in a modification tank. However, when the modification is carried out inside the same modification tank, reaction and maturation are required, which can easily lead to uneven modification effect due to the loose bonding between the modifier and the raw materials. In addition, it can easily produce a lot of unreacted modifier particles. These unreacted modifier particles are mixed into the finished product, affecting the uniformity of the modified raw materials and reducing the effectiveness of the preparation process and equipment. Summary of the Invention

[0004] The present invention aims to solve the technical problems existing in the prior art; to this end, the present invention proposes a process and apparatus for preparing cold-mixed and cold-laid ultra-thin overlay asphalt mixture.

[0005] A cold-mix, cold-lay, ultra-thin overlay asphalt mixture preparation device includes a support frame and a segmented modification tank mounted on the support frame. A connecting frame aligned with the segmented modification tank is installed on the lower side of the support frame. A filter box is installed on the upper end of the connecting frame. A first feeding pump connecting the segmented modification tank and the filter box is located at the bottom end of the support frame. The filter box contains a filtration mechanism, which includes a conveyor belt filter screen mounted inclined on the filter box, a first connecting box located on one side of the filter box, and a second connecting box located on the other side of the filter box. The filter box, the first connecting box, and the second connecting box all have openings that connect to the conveyor belt filter screen. The filter mechanism includes a matching through-slot, with the lower end of the conveyor belt filter screen located in a first connecting box and the higher end located in a second connecting box. Inside the filter box, near the first connecting box, is a baffle that fits against the conveyor belt filter screen. The filter mechanism also includes a connecting belt aligned with the conveyor belt filter screen and a first synchronous belt structure for controlling the movement of the connecting belt. The connecting belt and the first synchronous belt structure are respectively located inside the filter box, the first connecting box, and the second connecting box. The first synchronous belt structure has a transmission roller that works in conjunction with the conveyor belt filter screen to assist the conveyor belt filter screen in its operation.

[0006] As a further aspect of the present invention: the segmented modification tank includes a pretreatment tank, a reaction tank, and a maturation tank arranged from top to bottom on a support frame. Each of the pretreatment tank, reaction tank, and maturation tank is provided with a feed pipe that is interconnected. The support frame is provided with a plurality of fixing components for fixing the pretreatment tank, reaction tank, and maturation tank. The support frame is provided with a plurality of second feed pumps, which are respectively connected to the pretreatment tank, reaction tank, and maturation tank to assist in the feeding of materials from the pretreatment tank and reaction tank.

[0007] As a further aspect of the present invention: the lower end of the connecting frame is provided with a conveying box connected to the filter box, one end of the conveying box is connected to the conveying structure, the conveying structure can be configured as a screw conveyor or a conveying pump, the bottom ends of the first connecting box and the second connecting box are both equipped with a discharge box that passes through the connecting frame, and a collection box aligned with the discharge box is provided below the connecting frame.

[0008] As a further aspect of the present invention: the filtering mechanism further includes a first cleaning component disposed inside the first connecting box for cleaning the conveyor belt filter screen. The first cleaning component is installed inside the first connecting box with a baffle box and an auxiliary strip disposed below the baffle box and aligned with the baffle box. The lower end face of the baffle box is in contact with the inner bottom face of the conveyor belt filter screen. The baffle box has a feed inlet that matches the conveyor belt filter screen. One end of the baffle box extends out of the outside of the first connecting box and has a guide box that communicates with the collection box. The baffle box is provided with a spiral conveyor rod for assisting in feeding. The first cleaning component further includes a second synchronous belt structure aligned and connected with the first synchronous belt structure and a first transmission rod disposed on the second synchronous belt structure and controlling the spiral conveyor rod to work, so that when the first synchronous belt structure is working, the spiral conveyor rod is controlled to work through the second synchronous belt structure and the first transmission rod.

[0009] As a further aspect of the present invention: the first cleaning assembly further includes a first scraper disposed inside the first connecting box and in contact with the lowest point of the lower end face of the conveyor belt filter screen, and a first rotating rod rotatably disposed at the lower end of the first scraper. The lower end face of the first connecting box has a first feeding groove communicating with a feeding box. The bottom end of the first rotating rod is coaxially provided with a rotating frame and a first scraper arranged in a circular array on the rotating frame to clean the first feeding groove. The upper vertical section of the first scraper has a triangular structure, and the upper vertical section of the first scraper has a rectangular structure. The top end of the first rotating rod extends into the interior of the first scraper and is provided with a first bevel gear structure and a first bevel gear... The first connecting rod is coaxially connected to the gear structure. The first cleaning assembly also includes a first protective box disposed on the outer side of the first connecting box, a first main gear rotatably disposed inside the first protective box and coaxially connected to one end of the second synchronous belt structure, and a first rotating gear disposed on the lower side of the first main gear and meshing with the first main gear. The first main gear is coaxially disposed with the transmission roller, and the first rotating gear is coaxially connected with the first connecting rod, so that the second synchronous belt structure controls the first rotating gear to rotate through the first main gear. The first rotating gear, through the first connecting rod and the first bevel gear structure, causes the first rotating rod to drive the first scraper to clean the first feeding groove through the rotating frame.

[0010] As a further aspect of the present invention: the filtering mechanism further includes a second cleaning component disposed inside the second connecting box for cleaning the conveyor belt filter screen. The second cleaning component further includes a rotating roller rotatably disposed on the upper inner side of the second connecting box and a plurality of striking strips offset from the outer wall of the rotating roller for striking the conveyor belt filter screen. The rotating roller is disposed on the inner side of the conveyor belt filter screen. The second cleaning component further includes a third synchronous belt structure coaxially connected to the conveyor belt filter screen and a rotating rod disposed on the third synchronous belt structure and coaxially connected to the rotating roller.

[0011] As a further aspect of the present invention: the second cleaning assembly further includes a scraper installed inside the second connecting box for cleaning the lower side of the conveyor belt filter, a lifting bar movably disposed on one side of the scraper, and cleaning scrapers symmetrically disposed on the inner side of the lifting bar. The vertical cross-section of the cleaning scraper is triangular, and it scrapes off the impurities adhering to the scraper when the lifting bar rises and falls. The second cleaning assembly also includes a second bevel gear structure disposed at both ends of the rotating roller, a first screw drive structure coaxially connected to the second bevel gear structure, and a reinforcing rod disposed on the inner side of the first screw drive structure and perpendicularly connected to the lifting bar. One of the second bevel gear structures is connected to the third synchronous belt structure, so that when the third synchronous belt structure is working, the lifting bar is controlled to reciprocate and rise and fall through the second bevel gear structure and the first screw drive structure.

[0012] As a further aspect of the present invention: the inner side of the second connecting box is provided with a second feeding groove communicating with the feeding box; the second cleaning assembly further includes a second scraper installed inside the second connecting box for scraping the lower end face of the conveyor belt filter; the second scraper has a fourth bevel gear structure rotatably mounted inside; one end of the fourth bevel gear structure is coaxially connected to a second rotating rod; the bottom end of the second rotating rod is equipped with a second scraper for cleaning the second feeding groove via a rotating frame; the other end of the fourth bevel gear structure is coaxially connected to a second transmission rod; the second cleaning assembly further includes a second protective box disposed on the outer side of the second connecting box, a second main gear rotatably disposed inside the second protective box and aligned with the first synchronous belt structure, and a second rotating gear meshing with the second main gear; one end of the second rotating gear is coaxially connected to the second transmission rod, so that when the first synchronous belt structure is working, the second main gear and the second rotating gear enable the fourth bevel gear structure to control the second scraper to clean the second feeding groove.

[0013] As a further aspect of the present invention: the height of the second connecting box is greater than that of the first connecting box. The filtering mechanism further includes an auxiliary component disposed on the second connecting box to assist impurities in entering the feed box. The auxiliary component includes several suction pipes inclinedly disposed at the lower part of the second connecting box, an air guide box disposed on the outside of the second connecting box and communicating with the suction pipes, and an air outlet pipe disposed at the lower end of the air guide box. Both the suction pipes and the air outlet pipes are equipped with one-way valves, which ensure that the suction pipes can only draw in air and the air outlet pipes can only discharge air. A lifting pipe is movably disposed on the air guide box. The interior of the box is fitted with a piston that is perpendicularly connected to the lifting tube. The interior of the second protective box is equipped with a second screw drive structure that controls the lifting tube to move up and down. The top of the second screw drive structure is equipped with a third bevel gear structure. One end of the third bevel gear structure is coaxially connected to the second main gear. When the second main gear rotates, the third bevel gear structure moves through the second screw drive structure and the lifting tube to control the piston, so that the suction pipe draws air into the interior of the second connecting box, sucking small particulate impurities from the upper side of the interior of the second connecting box to the lower side, thereby improving the cleaning efficiency of small particulate impurities.

[0014] As a further aspect of the present invention: the auxiliary component further includes a fixing ring disposed at the head of the suction pipe and a filter cover disposed outside the fixing ring, the head of the suction pipe extending into the filter cover; the auxiliary component further includes a mounting bracket disposed on the inner wall of the second connecting box and a third scraper disposed on the mounting bracket and in contact with the filter cover; the inner wall of the second connecting box is provided with a protective cover that is movably sealed with the fixing ring; the inner side of the fixing ring is provided with a rotating gear ring coaxial with the suction pipe; the auxiliary component further includes a third rotating gear disposed in contact with the rotating gear ring and a universal joint coaxially connected to the third rotating gear; the second connecting box is provided with a rotating groove for the rotation of the third rotating gear and the universal joint; the auxiliary component further includes a first transmission gear disposed inside the second protective box and coaxially connected to the universal joint, and an auxiliary gear rotatably disposed inside the second protective box and in contact with the first transmission gear; a first auxiliary bevel gear is coaxially connected to the outer side of the auxiliary gear; a third transmission rod is provided at one end of the first auxiliary bevel gear; a second auxiliary bevel gear connected to the second rotating gear is coaxially connected at one end of the third transmission rod.

[0015] As a further aspect of the present invention: the filtering mechanism further includes a sealing assembly used in conjunction with the feeding box. The sealing assembly includes a sealing block movably disposed inside the connecting frame and opening or closing the feeding box, and a first moving gear rotatably disposed inside the connecting frame and controlling the horizontal movement of the sealing block. The lower end face of the sealing block is symmetrically provided with a first groove that matches the first moving gear, and a first moving rack that meshes with the first moving gear is installed in the first groove.

[0016] As a further aspect of the present invention: the filtering mechanism further includes a third protective box symmetrically arranged on the lower end face of the connecting frame and a second transmission gear rotatably arranged inside the third protective box and meshing with the first moving gear. One end of the second transmission gear is coaxially connected to the second moving gear through a transmission block. The third protective box has a first through groove that matches the second transmission gear and the second moving gear. The filtering mechanism further includes a moving strip symmetrically arranged on the upper end face of the collection box. The upper end face of the moving strip has a second groove that matches the second moving gear. A second moving rack that meshes with the second moving gear is installed in the second groove. The lower end face of the third protective box has a second through groove that matches the moving strip.

[0017] As a further aspect of the present invention: a process for preparing cold-mixed, cold-laid ultra-thin overlay asphalt mixture, comprising the following steps: S1. After screening, the raw materials are fed into a segmented modification tank for modification treatment. S2. The modified raw material is transported to the filter box and unreacted modifier particles are removed by a conveyor belt filter. S3. The inner side of the conveyor belt filter screen is cleaned by the auxiliary strip, baffle box and spiral conveyor rod so that the guide box conveys the cleaned particles to the collection box. The bottom of the conveyor belt filter screen is cleaned by the first scraper and the first scraper guides the unreacted modifier particles into the collection box through the feeding box. S4. The upper part of the conveyor belt filter screen is cleaned by the tapping bar, scraper and second scraper. The unreacted modifier particles are introduced into the collection box through the feeding box through the second scraper and suction pipe. S5. Prepare cold-mix asphalt liquid from the raw materials after the modifier. After preparation, mix the mixture and take samples from each layer for testing.

[0018] Compared with the prior art, the beneficial effects of the present invention are: (1) The present invention uses a segmented modification tank and a filtration mechanism, with a pretreatment tank, a reaction tank and a maturation tank working together to process the raw materials in segments, thereby enhancing the interfacial bonding force between the modifier and the raw materials, avoiding uneven modification effects and reducing the generation of unreacted modifier particles. The unreacted modifier particles are removed by the filter box, conveyor belt filter, first connecting box, second connecting box and baffle. The unreacted modifier particles can be collected by the feeding box and the collection box. The first moving gear, the first moving rack, the third protective box, the second transmission gear, the second moving gear, the moving bar and the second moving rack can control the sealing block to open or close the feeding box, which is convenient for cleaning and maintenance of the collection box, so that the filtration mechanism can work continuously and improve the use effect of the preparation device.

[0019] (2) The present invention uses a first cleaning component and a second cleaning component, a first synchronous belt structure, a second synchronous belt structure, a baffle box, an auxiliary strip, a guide box and a spiral conveyor rod to clean the inner bottom surface of the conveyor belt filter screen, a first scraper, a first rotating rod, a rotating frame and a first scraper to clean the lower part of the conveyor belt filter screen, and a rotating roller, a striking strip, a third synchronous belt structure, a scraper, a lifting strip and a cleaning scraper to clean the upper part of the conveyor belt filter screen, thereby extending the service life of the conveyor belt filter screen and improving the use effect of the preparation device.

[0020] (3) The present invention, through the auxiliary components, including the suction pipe, air guide box, air outlet pipe, one-way valve, lifting pipe and piston, can absorb the unreacted modifier particles on the upper part of the second connecting box, thereby improving the cleaning effect of the unreacted modifier particles. Through the fixed ring and filter cover, the unreacted modifier particles entering the suction pipe can be reduced. Through the protective cover, rotating gear ring, third rotating gear, universal joint, first transmission gear, auxiliary gear, first auxiliary bevel gear, third transmission rod and second auxiliary bevel gear, the third scraper cleans the filter cover, extends the service life of the filter cover and improves the auxiliary effect of the auxiliary components.

[0021] (4) The preparation process adopted in this invention pre-treats, reacts and matures the raw materials in a segmented modification tank, which significantly enhances the interfacial bonding force between the modifier and the raw materials, avoids uneven modification effect, and reduces the generation of unreacted modifier particles. Combined with the filter box and conveyor belt filter screen, the filter screen is cleaned in all directions by the first cleaning component and the second cleaning component. This not only efficiently removes unreacted modifier particles, but also extends the service life of the filter screen. At the same time, the unreacted particles are collected in a centralized manner through the feeding box and the collection box. The opening and closing of the feeding box can be controlled by the relevant transmission structure, which facilitates the cleaning and maintenance of the collection box and ensures the continuous and stable operation of the filtration mechanism. The structure of the auxiliary components such as the air intake pipe and the air guide box can further improve the cleaning effect of unreacted particles. The filter cover and the matching cleaning structure can prevent particles from clogging the air intake pipe and extend the service life of the filter cover. Attached Figure Description

[0022] Figure 1 This is an overall structural diagram of the present invention.

[0023] Figure 2 This is a partial structural diagram of the filtration mechanism in this invention.

[0024] Figure 3 This is a partial cross-sectional view of the filter box and filter mechanism in this invention.

[0025] Figure 4This is a partial structural diagram of the conveyor belt filter and the first cleaning component in this invention.

[0026] Figure 5 This is a partial structural diagram of the first cleaning component in this invention.

[0027] Figure 6 This is a partial structural diagram of the first cleaning component and the second cleaning component in this invention.

[0028] Figure 7 This is a partial structural diagram of the second cleaning component in this invention.

[0029] Figure 8 This is a partial structural diagram of the second main gear and auxiliary components in this invention.

[0030] Figure 9 This is a partial structural diagram of the auxiliary components in this invention.

[0031] Figure 10 This is a partial structural diagram of the sealing component in this invention.

[0032] Figure 11 This is a partial structural diagram of the blocking block and the moving strip in this invention.

[0033] Figure 12 This is a schematic diagram of the preparation process in this invention.

[0034] In the diagram: 1. Support frame; 2. Segmented modification tank; 3. Connecting frame; 4. Filter box; 5. Conveyor belt filter screen; 6. First connecting box; 7. Second connecting box; 8. Baffle; 9. Pretreatment tank; 10. Reaction tank; 11. Maturation tank; 12. Conveying box; 13. Discharge box; 14. Collection box; 15. Baffle box; 16. Auxiliary bar; 17. Guide box; 18. Screw conveyor; 19. First synchronous belt structure; 20. Second synchronous belt structure; 1. First scraper blade; 22. First rotating rod; 23. Rotating frame; 24. First scraper blade; 25. First bevel gear structure; 26. First connecting rod; 27. First protective box; 28. First main gear; 29. ​​First rotating gear; 30. Rotating roller; 31. Striking bar; 32. Third synchronous belt structure; 33. Scraper; 34. Lifting bar; 35. Cleaning scraper blade; 36. Second bevel gear structure; 37. First lead screw transmission structure; 38. Reinforcing rod; 3 9. Second rotating rod; 40. Second scraper; 41. Second transmission rod; 42. Second protective box; 43. Second main gear; 44. Second rotating gear; 45. Intake pipe; 46. Air guide box; 47. Exhaust pipe; 48. One-way valve; 49. Lifting pipe; 50. Piston; 51. Second lead screw transmission structure; 52. Third bevel gear structure; 53. Fixing ring; 54. Filter cover; 55. Third scraper; 56. Protective cover; 57. Rotating gear ring; 5 8. Third rotating gear; 59. Universal joint; 60. First transmission gear; 61. Auxiliary gear; 62. First auxiliary bevel gear; 63. Third transmission rod; 64. Second auxiliary bevel gear; 65. Sealing block; 66. First moving gear; 67. First moving rack; 68. Third protective box; 69. Second transmission gear; 70. Second moving gear; 71. Moving bar; 72. Second moving rack; 73. Second scraper; 74. Fourth bevel gear structure. Detailed Implementation

[0035] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1 Please see Figures 1-6This application provides a cold-mixed, cold-laid, ultra-thin overlay asphalt mixture preparation device, including a support frame 1 and a segmented modification tank 2 mounted on the support frame 1. A connecting frame 3 aligned with the segmented modification tank 2 is mounted on the lower side of the support frame 1. A filter box 4 is mounted on the upper end of the connecting frame 3. A first feeding pump connecting the segmented modification tank 2 and the filter box 4 is provided at the bottom end of the support frame 1. The filter box 4 is equipped with a filtering mechanism, which includes a conveyor belt filter screen 5 mounted inclined on the filter box 4, a first connecting box 6 located on one side of the filter box 4, and a second connecting box 7 located on the other side of the filter box 4. The filter box 4, the first connecting box 6, and the second connecting box 7 are all provided with through slots that match the conveyor belt filter screen 5. The lower end of the filter 5 is located in the first connecting box 6, and the higher end of the conveyor belt filter 5 is located in the second connecting box 7. The filter box 4 has a baffle 8 that fits against the conveyor belt filter 5 on the side near the first connecting box 6. The filter mechanism also includes a connecting belt that is aligned with the conveyor belt filter 5 and a first synchronous belt structure 19 that controls the movement of the connecting belt. The connecting belt and the first synchronous belt structure 19 are respectively located inside the filter box 4, the first connecting box 6, and the second connecting box 7. The filter box 4, the first connecting box 6, and the second connecting box 7 are all provided with a moving groove that matches the first synchronous belt structure 19. The first synchronous belt structure 19 is provided with a transmission roller that works with the conveyor belt filter 5 to assist the conveyor belt filter 5 in its operation.

[0037] In this embodiment, the raw material is introduced into the segmented modification tank 2 for modification treatment, and the raw material is transported to the filter box 4 by the first feed pump. The first synchronous belt structure 19 is activated, so that the connecting belt controls the conveyor belt filter screen 5 to move in the filter box 4, the first connecting box 6 and the second connecting box 7, so that the conveyor belt filter screen 5 filters the raw material.

[0038] In this invention, the segmented modification tank 2 includes a pretreatment tank 9, a reaction tank 10, and a maturation tank 11 arranged from top to bottom on a support frame 1. Each of the pretreatment tank 9, reaction tank 10, and maturation tank 11 is provided with a feed pipe that is interconnected. The support frame 1 is provided with a number of fixing components for fixing the pretreatment tank 9, reaction tank 10, and maturation tank 11. The support frame 1 is also provided with a number of second feed pumps, which are respectively connected to the pretreatment tank 9, reaction tank 10, and maturation tank 11 to assist in the feeding of the pretreatment tank 9 and reaction tank 10.

[0039] In this embodiment, the raw materials are introduced into the pretreatment tank 9 for pretreatment. After pretreatment, the raw materials are introduced into the reaction tank 10 through the feed pipe and the second feed pump for reaction. After the reaction, the raw materials are introduced into the maturation tank 11 for maturation treatment.

[0040] In this invention, the lower end of the connecting frame 3 is provided with a conveying box 12 connected to the filter box 4. One end of the conveying box 12 is connected to the conveying structure, which can be a screw conveyor or a conveying pump. The bottom ends of the first connecting box 6 and the second connecting box 7 are both equipped with a feeding box 13 that passes through the connecting frame 3. Below the connecting frame 3, there is a collection box 14 aligned with the feeding box 13.

[0041] In this embodiment, the filter box 4 introduces the filtered raw material into the conveying box 12, and the conveying box 12 conveys the raw material through the conveying structure. The first connecting box 6 and the second connecting box 7 introduce the unqualified raw material into the collection box 14 for collection through the feeding box 13.

[0042] The filtering mechanism of this invention also includes a first cleaning component disposed inside the first connecting box 6 for cleaning the conveyor belt filter screen 5. The first cleaning component is installed inside the first connecting box 6 with a baffle box 15 and an auxiliary strip 16 disposed below and aligned with the baffle box 15. The lower end face of the baffle box 15 is in contact with the inner bottom face of the conveyor belt filter screen 5. The baffle box 15 has a feed inlet that matches the conveyor belt filter screen 5. One end of the baffle box 15 extends out of the outside of the first connecting box 6 and is provided with a guide box 17 that communicates with the collection box 14. The inside of the baffle box 15 is provided with a spiral conveyor rod 18 for assisting in feeding. The first cleaning component also includes a second synchronous belt structure 20 that is aligned and connected with the first synchronous belt structure 19 and a first transmission rod disposed in the second synchronous belt structure 20 and controlling the spiral conveyor rod 18 to work, so that when the first synchronous belt structure 19 is working, the spiral conveyor rod 18 is controlled to work through the second synchronous belt structure 20 and the first transmission rod.

[0043] In this embodiment, when the conveyor belt filter 5 is working, the feed inlet can guide the raw material on the inner bottom surface of the conveyor belt filter 5 into the baffle box 15, so that the first synchronous belt structure 19 drives the second synchronous belt structure 20 to work, the second synchronous belt structure 20 drives the first transmission rod to rotate, the first transmission rod drives the spiral conveyor rod 18 to rotate, conveying the raw material inside the baffle box 15 and conveying the raw material to the guide box 17, and then conveying the raw material to the collection box 14 through the guide box 17.

[0044] The first cleaning component of this invention further includes a first scraper 21 disposed inside the first connecting box 6 and attached to the lowest point of the lower end face of the conveyor belt filter screen 5, and a first rotating rod 22 rotatably disposed at the lower end of the first scraper 21. The lower end face of the first connecting box 6 is provided with a first feeding groove communicating with the feeding box 13. The bottom end of the first rotating rod 22 is coaxially provided with a rotating frame 23 and a first scraper 24 arranged in a circular array on the rotating frame 23 to clean the first feeding groove. The upper vertical section of the first scraper 21 is triangular and rectangular. The top end of the first rotating rod 22 extends into the interior of the first scraper 21 and is provided with a first bevel gear structure 25 and a first connecting rod 24 coaxially connected to the first bevel gear structure 25. The connecting rod 26 and the first cleaning assembly also include a first protective box 27 disposed on the outer side of the first connecting box 6, a first main gear 28 rotatably disposed inside the first protective box 27 and coaxially connected to one end of the second synchronous belt structure 20, and a first rotating gear 29 disposed on the lower side of the first main gear 28 and meshing with the first main gear 28. The first main gear 28 is coaxially disposed with the transmission roller, and the first rotating gear 29 is coaxially connected with the first connecting rod 26, so that the second synchronous belt structure 20 controls the first rotating gear 29 to rotate through the first main gear 28. The first rotating gear 29, through the first connecting rod 26 and the first bevel gear structure 25, causes the first rotating rod 22 to drive the first scraper 24 to clean the first feeding groove through the rotating frame 23.

[0045] In this embodiment, when the conveyor belt filter 5 is working, the first scraper 21 cleans the raw material adhering to the outer surface of the conveyor belt filter 5 and guides the cleaned raw material into the first feeding groove on the lower side. When the second synchronous belt structure 20 is working, the second synchronous belt structure 20 drives the first main gear 28 to rotate, the first main gear 28 drives the first rotating gear 29 to rotate, the first rotating gear 29 drives the first connecting rod 26 to rotate, the first connecting rod 26 drives the first bevel gear structure 25 to rotate, the first bevel gear structure 25 drives the first rotating rod 22 to rotate, the first rotating rod 22 drives the rotating frame 23 to rotate, and the rotating frame 23 drives the first scraper 24 to rotate, so that the first scraper 24 cleans the raw material adhering to the first feeding groove.

[0046] Example 2 Based on Example 1, referring to Figures 3-8In the second embodiment of the present invention, the filtering mechanism further includes a second cleaning component disposed inside the second connecting box 7 and used to clean the conveyor belt filter 5. The second cleaning component also includes a rotating roller 30 rotatably disposed on the upper inner side of the second connecting box 7 and several striking strips 31 offset from the outer wall of the rotating roller 30 and used to strike the conveyor belt filter 5. The rotating roller 30 is disposed on the inner side of the conveyor belt filter 5. The second cleaning component also includes a third synchronous belt structure 32 coaxially connected to the conveyor belt filter 5 and a rotating rod disposed on the third synchronous belt structure 32 and coaxially connected to the rotating roller 30.

[0047] In this embodiment, when the first synchronous belt structure 19 drives the conveyor belt filter 5 to work, the transmission roller drives the third synchronous belt structure 32 to work, the third synchronous belt structure 32 drives the rotating rod to rotate, the rotating rod drives the rotating roller 30 to rotate, and the rotating roller 30 drives the striking strip 31 to rotate, so that the striking strip 31 strikes and cleans the conveyor belt filter 5.

[0048] The second cleaning component of this invention also includes a scraper 33 installed inside the second connecting box 7 to clean the lower side of the conveyor belt filter screen 5, a lifting bar 34 movably disposed on one side of the scraper 33, and cleaning scrapers 35 symmetrically disposed on the inner side of the lifting bar 34. The vertical cross-section of the cleaning scraper 35 is triangular, and it scrapes off the impurities adhering to the scraper 33 when the lifting bar 34 rises and falls. The second cleaning component also includes a second bevel gear structure 36 disposed at both ends of the rotating roller 30, a first lead screw transmission structure 37 coaxially connected to the second bevel gear structure 36, and a reinforcing rod 38 disposed on the inner side of the first lead screw transmission structure 37 and perpendicularly connected to the lifting bar 34. The outer side of the first lead screw transmission structure 37 is fitted with a telescopic sleeve. The first lead screw transmission structure 37 is configured as a reciprocating lead screw. One of the second bevel gear structures 36 is connected to the third synchronous belt structure 32, so that when the third synchronous belt structure 32 is working, the lifting bar 34 is controlled to reciprocate and rise through the second bevel gear structure 36 and the first lead screw transmission structure 37.

[0049] In this embodiment, when the conveyor belt filter 5 moves, the scraper 33 scrapes off the raw material adhering to the lower side of the conveyor belt filter 5 and guides the scraped raw material into the second feeding groove. When the third synchronous belt structure 32 rotates, the rotating roller 30 rotates. Both the rotating roller 30 and the third synchronous belt structure 32 drive the second bevel gear structure 36 to rotate. The second bevel gear structure 36 drives the first lead screw transmission structure 37 to work, causing the first lead screw transmission structure 37 to drive the reinforcing rod 38 to move. The reinforcing rod 38 drives the lifting bar 34 to move up and down, causing the lifting bar 34 to drive the cleaning scraper 35 to clean the outer surface of the scraper 33, preventing raw material from adhering to the scraper 33.

[0050] In this invention, the inner side of the second connecting box 7 is provided with a second feeding groove communicating with the feeding box 13. The second cleaning assembly also includes a second scraper 73 installed inside the second connecting box 7 to scrape the lower end face of the conveyor belt filter screen 5. A fourth bevel gear structure 74 is rotatably provided inside the second scraper 73. One end of the fourth bevel gear structure 74 is coaxially connected to a second rotating rod 39. The bottom end of the second rotating rod 39 is equipped with a second scraper 40 for cleaning the second feeding groove through a rotating frame 23. The other end of the fourth bevel gear structure 74 is coaxially connected to a second transmission rod 41. The second cleaning assembly also includes a second protective box 42 disposed on the outer side of the second connecting box 7, a second main gear 43 rotatably disposed inside the second protective box 42 and aligned with the first synchronous belt structure 19, and a second rotating gear 44 meshing with the second main gear 43. One end of the second rotating gear 44 is coaxially connected to the second transmission rod 41, so that when the first synchronous belt structure 19 is working, the second main gear 43 and the second rotating gear 44 enable the fourth bevel gear structure 74 to control the second scraper 40 to clean the second feeding groove.

[0051] In this embodiment, when the first synchronous belt structure 19 drives the conveyor belt filter 5 to move, the second scraper 73 scrapes off the raw material adhering to the lower side of the conveyor belt filter 5. The first synchronous belt structure 19 drives the second main gear 43 to rotate, the second main gear 43 drives the second rotating gear 44 to rotate, the second rotating gear 44 drives the second transmission rod 41 to rotate, the second transmission rod 41 drives the fourth bevel gear structure 74 to rotate, and the fourth bevel gear structure 74 drives the second rotating rod 39 to rotate. The second rotating rod 39 drives the second scraper 40 to clean the second feeding groove through the rotating frame 23.

[0052] Example 3 Based on Example 2, referring to Figure 4 and Figures 6-11This is the third embodiment of the present invention, wherein the height of the second connecting box 7 is greater than the height of the first connecting box 6. The filtering mechanism further includes an auxiliary component disposed on the second connecting box 7 to assist impurities in entering the feed box 13. The auxiliary component includes several suction pipes 45 inclinedly disposed at the lower part of the second connecting box 7, an air guide box 46 disposed on the outside of the second connecting box 7 and communicating with the suction pipes 45, and an air outlet pipe 47 disposed at the lower end of the air guide box 46. One-way valves 48 are installed on both the suction pipes 45 and the air outlet pipe 47. The one-way valves 48 ensure that the suction pipes 45 can only draw in air and the air outlet pipes 47 can only discharge air. A lifting pipe 49 is movably disposed on the air guide box 46, and a piston 50 perpendicularly connected to the lifting pipe 49 is fitted inside the air guide box 46. The second protective box 42 is equipped with a second lead screw transmission structure 51 that controls the lifting tube 49 to move up and down. The second lead screw transmission structure 51 is a reciprocating lead screw that can control the lifting tube 49 to move up and down. The top of the second lead screw transmission structure 51 is equipped with a third bevel gear structure 52. A telescopic sleeve is fitted on the outside of the second lead screw transmission structure 51. One end of the third bevel gear structure 52 is coaxially connected to the second main gear 43. When the second main gear 43 rotates, the third bevel gear structure 52 controls the piston 50 to move through the second lead screw transmission structure 51 and the lifting tube 49, so that the suction pipe 45 sucks air into the second connecting box 7, sucking small particulate impurities from the upper side of the second connecting box 7 to the lower side, thereby improving the cleaning efficiency of small particulate impurities.

[0053] In this embodiment, when the second main gear 43 rotates, it drives the third bevel gear structure 52 to rotate, causing the third bevel gear structure 52 to drive the second lead screw transmission structure 51 to work inside the second protective box 42. The second lead screw transmission structure 51 drives the lifting pipe 49 to move in the air guide box 46. When the lifting pipe 49 drives the piston 50 to move upward, the one-way valve 48 causes the suction pipe 45 to suck in air, generating a negative pressure airflow inside the second connecting box 7, which sucks in the raw material particles on the upper side, causing the raw material particles to fall into the second feeding groove on the lower side of the second connecting box 7. When the second lead screw transmission structure 51 controls the piston 50 to move downward through the lifting pipe 49, the one-way valve 48 causes the air outlet pipe 47 to discharge the gas in the air guide box 46.

[0054] The auxiliary component of this invention also includes a fixing ring 53 disposed at the head of the suction pipe 45 and a filter cover 54 disposed outside the fixing ring 53. The head of the suction pipe 45 extends into the filter cover 54. The auxiliary component also includes a mounting bracket disposed on the inner wall of the second connecting box 7 and a third scraper 55 disposed on the mounting bracket and in contact with the filter cover 54. The inner wall of the second connecting box 7 is provided with a protective cover 56 that is movably sealed with the fixing ring 53. A rotating toothed ring 57 coaxial with the suction pipe 45 is vertically disposed on the inner side of the fixing ring 53. The auxiliary component also includes a third rotating gear 58 that meshes with the rotating toothed ring 57 and a third rotating gear 58 that meshes with the rotating toothed ring 57. The universal joint 59 is coaxially connected, and the second connecting box 7 has a rotating groove for the rotation of the third rotating gear 58 and the universal joint 59. The auxiliary assembly also includes a first transmission gear 60 disposed inside the second protective box 42 and coaxially connected to the universal joint 59, and an auxiliary gear 61 rotatably disposed inside the second protective box 42 and meshing with the first transmission gear 60. A first auxiliary bevel gear 62 is coaxially connected to the outside of the auxiliary gear 61. A third transmission rod 63 is provided at one end of the first auxiliary bevel gear 62, and a second auxiliary bevel gear 64 connected to the second rotating gear 44 is coaxially connected to one end of the third transmission rod 63.

[0055] In this embodiment, when the second rotating gear 44 rotates, it drives the second auxiliary bevel gear 64 to rotate, which in turn drives the third transmission rod 63 to rotate. The third transmission rod 63 drives the first auxiliary bevel gear 62 to rotate, which in turn drives the auxiliary gear 61 to rotate. This causes the auxiliary gear 61 to drive the two first transmission gears 60 to rotate, which in turn drives the universal joint 59 to rotate. The universal joint 59 then drives the third rotating gear 58 to rotate, which in turn drives the rotating gear ring 57 to rotate. This causes the rotating gear ring 57 to drive the fixed ring 53 to rotate, which in turn drives the filter cover 54 to rotate. This allows the third scraper 55 to clean the raw material adhering to the filter cover 54 and guide the cleaned raw material into the second feeding groove.

[0056] The filtering mechanism of the present invention also includes a sealing assembly used in conjunction with the feeding box 13. The sealing assembly includes a sealing block 65 that is movably disposed inside the connecting frame 3 and opens or closes the feeding box 13, and a first moving gear 66 that is rotatably disposed inside the connecting frame 3 and controls the horizontal movement of the sealing block 65. The lower end face of the sealing block 65 is symmetrically provided with a first groove that matches the first moving gear 66, and a first moving rack 67 that meshes with the first moving gear 66 is installed in the first groove.

[0057] In this embodiment, when the first moving gear 66 rotates, it causes the first moving gear 66 to drive the first moving rack 67 to move, and the first moving rack 67 drives the sealing block 65 to move, so that the sealing block 65 opens or closes the feeding box 13.

[0058] The filtering mechanism of the present invention further includes a third protective box 68 symmetrically arranged on the lower end face of the connecting frame 3 and a second transmission gear 69 rotatably arranged inside the third protective box 68 and meshing with the first moving gear 66. One end of the second transmission gear 69 is coaxially connected to the second moving gear 70 through a transmission block. The third protective box 68 is provided with a first through groove that matches the second transmission gear 69 and the second moving gear 70. The filtering mechanism also includes a moving strip 71 symmetrically arranged on the upper end face of the collection box 14. The upper end face of the moving strip 71 is provided with a second groove that matches the second moving gear 70. A second moving rack 72 that meshes with the second moving gear 70 is installed in the second groove. The lower end face of the third protective box 68 is provided with a second through groove that matches the moving strip 71.

[0059] In this embodiment, when the collection box 14 is moved below the feeding box 13, the moving bar 71 drives the second moving rack 72 to move. When the second moving rack 72 meshes with the second moving gear 70, the second moving rack 72 continues to move, causing the second moving rack 72 to drive the second moving gear 70 to rotate. The second moving gear 70 drives the second transmission gear 69 to rotate through the transmission block. The second transmission gear 69 drives the first moving gear 66 to rotate, causing the first moving gear 66 to drive the sealing block 65 to move through the first moving rack 67. This causes the sealing block 65 to open the feeding box 13. When it is necessary to process the raw materials in the collection box 14, the collection box 14 is removed from the feeding box 13. The moving bar 71 causes the second moving rack 72, the second moving gear 70, the second transmission gear 69, and the first moving gear 66 to drive the sealing block 65 through the first moving gear 66 and the first moving rack 67 to close the feeding box 13.

[0060] Example 4 Based on Example 3, referring to Figures 1-12 This is the fourth embodiment of the present invention, wherein a process for preparing a cold-mixed, cold-laid ultra-thin overlay asphalt mixture includes the following steps: S1. After screening, the raw materials are introduced into the segmented modification tank 2 for modification treatment; S2. The modified raw material is transported to the filter box 4 and the unreacted modifier particles are removed by the conveyor belt filter screen 5. S3. The inner side of the conveyor belt filter screen 5 is cleaned by the auxiliary bar 16, the baffle box 15 and the spiral conveyor rod 18 so that the guide box 17 conveys the cleaned particles to the collection box 14. The bottom of the conveyor belt filter screen 5 is cleaned by the first scraper 21. The first scraper 24 guides the unreacted modifier particles into the collection box 14 through the feed box 13. S4. The upper part of the conveyor belt filter screen 5 is cleaned by the tapping bar 31, scraper 33 and second scraper 73, and the unreacted modifier particles are introduced into the collection box 14 through the feeding box 13 by the second scraper 40 and the suction pipe 45. S5. Prepare cold-mix asphalt liquid from the raw materials after the modifier. After preparation, mix the mixture and take samples from each layer for testing.

[0061] In step S1, the raw materials are screened using a grading and screening mechanism, and the qualified raw materials are sent to the segmented modification tank 2 via a sealed screw conveyor. First, they enter the pretreatment tank 9, where the temperature is controlled at 50-60℃ for drying and preheating to remove surface moisture and prevent moisture from interfering with the modification reaction. After preheating, the raw materials enter the reaction tank 10, and the high-frequency stirring component is started to adjust the stirring rate according to the modified material. At the same time, the ultrasonic dispersion device is turned on, and functional additives such as modified basalt fiber and modified graphene oxide are added. The mixture is stirred and dispersed until there are no lumps, ensuring that the additives and raw materials are evenly mixed. The reacted raw materials enter the curing tank 11, where the curing section's insulation layer extends the modification reaction time and enhances the interfacial bonding force between the modifier and the raw materials under a 30-40℃ heat preservation environment, thus completing the modification treatment.

[0062] In step S5, the base asphalt is fed into the heating tank, and the dual temperature control system is activated. The outer side of the heating tank has a double-layer insulation layer to reduce heat loss, and the inner layer of the double-layer heating chamber is circulated with heat transfer oil for precise heating. Multiple temperature sensors inside the heating tank monitor the asphalt temperature in real time at the top, middle, and bottom, transmitting the data to the intelligent control system. When the temperature deviates from the set range of 120-130℃, the system automatically adjusts the heating power, and coolant is circulated into the outer heating chamber to balance the temperature, preventing localized overheating, aging, or incomplete melting. The asphalt temperature is maintained stable at 120-130℃ to ensure uniform melting and good fluidity. A diluent is added to the melted asphalt, and the optimized multi-layer staggered stirring device is activated. The bottom spiral blades agitate the asphalt at the bottom of the tank, the middle inclined blades promote lateral mixing, and the top scraper blades remove asphalt liquid adhering to the tank wall, preventing raw material waste and clumping. The mixing process is adjusted according to the viscosity of the asphalt and diluent. The intelligent control system adjusts the power, speed, and time of the mixing motor, monitors the mixing state in real time, and ensures thorough integration of the two components. A bottom vibration device in the mixing tank is activated to reduce asphalt sedimentation, while a scraper removes asphalt adhering to the tank wall to prevent prolonged adhesion and hardening, further improving mixing uniformity. The mixed cold-mix asphalt is then transferred to a storage tank, where a stirring and insulation structure periodically agitates at low speed to prevent asphalt stratification. A heat-conducting oil heater insulates the storage tank and connecting pipes. The asphalt is then transported to the mixing module via insulated pipelines. A temperature compensation device on the pipeline monitors the temperature in real time; when the asphalt temperature drops below 110℃, the heating function is automatically activated to maintain fluidity and ensure effective subsequent mixing. A thin-walled stainless steel spiral electronic scale is activated to accurately measure the pretreated modified raw materials, curing agents, functional additives, and other components, with an error controlled within ±0.Within 5%, each component is equipped with an independent metering hopper to avoid mixing and metering deviations; the powder system has an online calibration function to calibrate metering accuracy in real time; emulsified asphalt is delivered through a variable frequency metering pump, and the amount of asphalt liquid is quantitatively matched according to the aggregate delivery volume to achieve dynamic adjustment of the mix ratio; after metering, each component is synchronously fed into the primary mixing tank according to the design ratio to solve the problem of feeding lag; a two-stage staged mixing and coating is adopted; the primary mixing tank starts a twin-shaft synchronous gear drive structure and is equipped with high wear-resistant chromium alloy multi-blade to pre-mix the aggregate, curing agent, and functional additives, control the temperature at 20-25℃, and mix for 3-5 minutes to ensure that the materials are initially mixed evenly; The pre-mixed material is fed into the secondary mixing tank, and simultaneously, insulated cold-mix asphalt is introduced. A high-speed mixing scheme with densely packed small-bladed impellers is initiated, and mixing continues for 5-8 minutes. Simultaneously, an ultrasonic-assisted mixing device is activated to promote uniform coating of the aggregate surface with asphalt, preventing white aggregate and exposed aggregate. During mixing, the curved tank bottom reduces material residue. After mixing, an anti-segregation device at the tank outlet prevents secondary segregation during discharge, thus preventing premature demulsification of the emulsified asphalt. When the mixture is discharged from the secondary buffer silo, a three-layer sampling structure is used to sample the surface, middle, and bottom layers of the mixture, simulating on-site construction conditions, and simultaneously testing key indicators such as demulsification time, bond strength, and uniformity of each layer.

[0063] The above embodiments are only used to illustrate the technical methods of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of the present invention without departing from the spirit and scope of the technical methods of the present invention.

Claims

1. A device for preparing cold-mixed, cold-laid, ultra-thin overlay asphalt mixture, characterized in that, include: Support frame; The segmented modification tank is equipped with a second feed pump and a feed pipe to transport raw materials. A filter box, which is connected to a segmented modification tank, is equipped with a conveyor belt filter screen that is installed at an incline to filter unreacted modifier particles. The filter box is mounted on a connecting frame. The first connecting box and the second connecting box are respectively connected and disposed on both sides of the outer surface of the filter box. Both the first connecting box and the second connecting box are connected to the collection box through the feeding box. The first synchronous belt structure is inclinedly arranged in the first connecting box, the filter box and the second connecting box, and controls the movement of the conveyor belt filter screen.

2. The cold-mixed, cold-laid, ultra-thin overlay asphalt mixture preparation device according to claim 1, characterized in that, The connecting frame is equipped with a sealing block inside to open or close the feeding box; The connecting frame is equipped with a first moving gear that controls the horizontal movement of the sealing block. The sealing block is provided with a first movable rack that meshes with the first movable gear; The lower end face of the connecting frame is symmetrically provided with a third protective box; The third protective box is internally equipped with a second transmission gear that meshes with the first moving gear; One end of the second transmission gear is coaxially connected to a second moving gear via a transmission block; The upper end of the collection box is symmetrically provided with movable strips; The moving bar is provided with a second moving rack that meshes with the second moving gear.

3. The cold-mixed, cold-laid, ultra-thin overlay asphalt mixture preparation device according to claim 1, characterized in that, The filter box has a baffle that fits against the conveyor belt filter screen on the side near the first connecting box. One side of the conveyor belt filter screen is attached to the inner side of the filter box; The first connecting box is equipped with a baffle box that fits against the inner bottom surface of the conveyor belt filter screen. The bottom of the baffle box is provided with an auxiliary strip that fits against the lower end face of the conveyor belt filter screen; The baffle box is provided with a feed inlet that matches the conveyor belt filter screen; One end of the baffle box extends out of the outside of the first connecting box and is provided with a guide box that communicates with the collection box; The material box is equipped with a spiral conveyor rod for assisting material feeding; A second synchronous belt structure is installed on the outer side of the first synchronous belt structure to control the operation of the spiral conveyor rod.

4. The cold-mixed, cold-laid, ultra-thin overlay asphalt mixture preparation device according to claim 3, characterized in that, The first connecting box is equipped with a first scraper strip that fits against the lowest point of the lower end face of the conveyor belt filter screen. A first rotating rod is rotatably mounted on the first scraper; The bottom end of the first rotating rod is provided with a rotating frame; The rotating frame is equipped with several first scrapers for cleaning the first feeding groove of the first connecting box; The first scraper bar has a first bevel gear structure that is coaxially connected to the first rotating rod; The first bevel gear structure extends out of the first connecting box via a first connecting rod; A first rotating gear, coaxially connected to the first connecting rod, is installed on the outside of the first connecting box; The outer side of the first connecting box is provided with a first main gear that meshes with the first rotating gear; The first main gear is coaxially connected to one end of the second synchronous belt structure; When the second synchronous belt structure controls the first rotating gear to rotate through the first main gear, the first rotating gear, through the first connecting rod and the first bevel gear structure, causes the first rotating rod to drive the first scraper to clean the first feeding groove through the rotating frame.

5. The cold-mixed, cold-laid, ultra-thin overlay asphalt mixture preparation device according to claim 1, characterized in that, The second connecting box is equipped with a rotating roller for rotation. The rotating roller is provided with several striking strips that are staggered to strike the inner bottom surface of the conveyor belt filter screen. The outer side of the conveyor belt filter screen is provided with a third synchronous belt structure for controlling the rotation of the rotating rollers. The third synchronous belt structure is connected to the conveyor belt filter screen transmission; The second connecting box is equipped with a scraper for cleaning the underside of the conveyor belt filter screen; One side of the scraper is provided with a lifting bar that is connected to the third synchronous belt structure for transmission. The inner side of the lifting bar is symmetrically provided with cleaning scrapers for cleaning the scraper.

6. The apparatus for preparing cold-mixed, cold-laid, ultra-thin overlay asphalt mixture according to claim 5, characterized in that, The rotating roller is provided with a second bevel gear structure at both ends; The lower end of the second bevel gear structure is coaxially connected to the first lead screw transmission structure; The outer surface of the lifting bar is vertically provided with reinforcing rods on both sides, which are connected to the first lead screw transmission structure. A second bevel gear structure is connected to a third synchronous belt structure; When the third synchronous belt structure is working, the lifting bar is controlled to reciprocate up and down through the second bevel gear structure and the first lead screw transmission structure.

7. The apparatus for preparing cold-mixed, cold-laid, ultra-thin overlay asphalt mixture according to claim 6, characterized in that, The interior of the second connecting box is equipped with a second scraper for scraping the lower end face of the conveyor belt filter screen; The second scraper has a fourth bevel gear structure for internal rotation; One end of the fourth bevel gear structure is coaxially connected to a second rotating rod. The bottom end of the second rotating rod is equipped with a second scraper for cleaning the second feeding groove of the second connecting box via a rotating frame; The other end of the fourth bevel gear structure is coaxially connected to the second transmission rod. One end of the second transmission rod extends out of the second connecting box and is connected to the second rotating gear; The outer side of the second connecting box is provided with a second main gear that is aligned and connected to the first synchronous belt structure; The second main gear meshes with the second rotary gear; When the first synchronous belt structure is working, the second main gear and the second rotary gear enable the fourth bevel gear structure to control the second scraper to clean the second feeding groove.

8. The apparatus for preparing cold-mixed, cold-laid, ultra-thin overlay asphalt mixture according to claim 7, characterized in that, The lower part of the second connecting box is provided with an air suction pipe that works in conjunction with the second scraper; The outer side of the second connecting box is provided with an air guide box that communicates with the air intake pipe; The bottom of the air guide box is provided with an air outlet pipe; Both the intake pipe and the exhaust pipe are equipped with one-way valves. A lifting pipe is movably provided on the air guide box; The air guide box is fitted with a piston component that is perpendicularly connected to the lifting pipe; The outer side of the second connecting box is equipped with a second lead screw transmission structure for controlling the lifting tube to move up and down; The top of the second lead screw transmission structure is provided with a third bevel gear structure; One end of the third bevel gear structure is coaxially connected to the second main gear. When the second main gear rotates, the third bevel gear structure moves through the second lead screw transmission structure and the lifting pipe to control the piston, causing the suction pipe to draw air into the second connecting box and suck the cleaned particles into the second discharge groove.

9. The apparatus for preparing cold-mixed, cold-laid, ultra-thin overlay asphalt mixture according to claim 8, characterized in that, The head of the suction tube is provided with a retaining ring; The outer side of the fixing ring is provided with a filter cover that works in conjunction with the suction pipe; The inner wall of the second connecting box is equipped with a third scraper that fits into the filter cover; The inner wall of the second connecting box is provided with a protective cover that is movably sealed with the fixing ring; The fixed ring is vertically provided with a rotating toothed ring coaxial with the air intake pipe on the side near the protective cover. The second connecting box is provided with a third rotating gear that meshes with the rotating gear ring; The third rotating gear is coaxially connected to a universal joint; The outer side of the second connecting box is provided with a first transmission gear that is coaxially connected to the universal joint; The outer side of the second connecting box is provided with an auxiliary gear that meshes with the first transmission gear; The auxiliary gear is coaxially connected to the outer side of the auxiliary gear; A third transmission rod is provided at one end of the first auxiliary bevel gear; One end of the third transmission rod is coaxially connected to a second auxiliary bevel gear, which is connected to the second rotating gear.

10. A process for preparing cold-mixed, cold-laid, ultra-thin overlay asphalt mixture, and an apparatus for preparing cold-mixed, cold-laid, ultra-thin overlay asphalt mixture according to claims 1-9, characterized in that, Includes the following steps: S1. After screening, the raw materials are fed into a segmented modification tank for modification treatment. S2. The modified raw material is transported to the filter box and unreacted modifier particles are removed by a conveyor belt filter. S3. The inner side of the conveyor belt filter screen is cleaned by the auxiliary strip, baffle box and spiral conveyor rod so that the guide box conveys the cleaned particles to the collection box. The bottom of the conveyor belt filter screen is cleaned by the first scraper and the first scraper guides the unreacted modifier particles into the collection box through the feeding box. S4. The upper part of the conveyor belt filter screen is cleaned by the tapping bar, scraper and second scraper. The unreacted modifier particles are introduced into the collection box through the feeding box through the second scraper and suction pipe. S5. Prepare cold-mix asphalt liquid from the raw materials after the modifier. After preparation, mix the mixture and take samples from each layer for testing.

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