Bituminous pavement cold-in-place recycling train

Abstract

The utility model discloses an on-site cold regeneration train for an asphalt pavement, which belongs to the technical field of asphalt pavement maintenance equipment and comprises a movable shoveling unit, a crushing unit, a stripping and screening unit, a batching unit and a mixing unit. The crushed black stone material enters the stripping and screening unit to complete stripping and screening of the stone material, then enters the batching unit to participate in batching again, a solid material and a liquid material are mixed through the mixing unit to complete cold regeneration of the asphalt mixture, and finally the asphalt mixture is conveyed to a paver to realize on-site paving. By adopting a movable structure, the cold recycling system can be conveniently transferred at any time, can finish shoveling and crushing of old pavements, stripping and screening of old stones, proportioning and mixing on site to realize cold recycling of asphalt mixtures, and can realize cold recycling and paving on site without being transferred to a factory, so that the transportation cost and the time cost are greatly reduced, and the production efficiency is improved. The construction efficiency is improved, the pavement can be quickly repaired, and the traffic pressure is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of asphalt pavement maintenance equipment, and particularly relates to an in-situ cold recycling train for asphalt pavement. Background Art

[0002] With the continuous and rapid development of China's economy, the highway mileage is getting longer and longer, and a large number of highways enter the maintenance stage every year. Since the materials such as asphalt and sand and gravel required for asphalt pavement are non-renewable resources, among the large amount of waste pavement materials generated during the major and medium repairs of highways, although their overall road performance can no longer meet the requirements of pavement use, they still have high utilization value as materials themselves.

[0003] At present, the recycling methods of waste pavement materials mostly adopt two methods: hot recycling and cold recycling. Hot recycling is to mix a certain amount of new aggregate, new asphalt, recycling agent (if necessary) etc. according to the asphalt content, asphalt aging degree, aggregate gradation etc. in the old material to carry out hot mixing to reach the specified indicators. Although the hot recycling has good recovery effect, the process is complex and the investment is high. Cold recycling is to soften, crush and screen the waste materials, and then add a certain amount of new aggregate, recycling binder, recycling agent etc. into the mixing equipment for normal temperature or slightly heated mixing to obtain recycled materials. Cold recycling has broad application prospects because it can recycle waste asphalt pavement materials. However, the existing cold recycling is mostly carried out in factories far from the highway. This will increase the transportation cost and time cost, and the failure to timely spread and repair the pavement will also increase the traffic pressure. Therefore, it is necessary to develop a continuous treatment equipment capable of in-situ cold recycling to improve the construction efficiency and reduce the impact on traffic operation. Content of the Utility Model

[0004] In order to solve the above problems, the utility model provides an in-situ cold recycling train for asphalt pavement.

[0005] To achieve the above object, the technical scheme adopted by the utility model is as follows:

[0006] An in-situ cold recycling train for asphalt pavement includes a mobile scarifying unit, a crushing unit, a stripping and screening unit, a batching unit and a mixing unit which are connected in sequence. The discharge port of the scarifying unit is connected to the feed port of the crushing unit, and is used for milling the old asphalt pavement and conveying it to the crushing unit; the discharge port of the crushing unit is connected to the feed port of the stripping and screening unit, and is used for conveying the crushed old asphalt mixture to the stripping and screening unit for stone stripping; the stone outlet of the stripping and screening unit is connected to the feed port of the batching unit, and the discharge port of the batching unit is connected to the feed port of the mixing unit, and is used for conveying the mixed solid materials to the mixing unit. The mixing unit is used for mixing the solid materials and liquid materials to complete the cold recycling of the asphalt mixture; the discharge port of the mixing unit is arranged above the feed port of the paver.

[0007] Further, the scraping unit includes a vehicle body and a scraper blade capable of scraping the old asphalt pavement at the bottom thereof. A cab is provided at the upper part of the vehicle body, and a traveling mechanism is provided at the bottom. The scraper blade is arranged at the front of the vehicle body. A recycling and conveying mechanism for collecting and conveying the old asphalt pavement materials to the crushing unit is arranged at the front side of the scraper blade. A road surface roughening mechanism and a cleaning mechanism are arranged at the rear side of the scraper blade. The scraper blade is connected to a high-frequency impact assembly for performing high-frequency impact on the old asphalt pavement. The high-frequency impact assembly is controlled by a console in the cab. The recycling and conveying mechanism includes a first conveyor belt and a second conveyor belt controlled by the console. The first conveyor belt is arranged below the vehicle body and is obliquely arranged above and in front of the scraper blade. Rows of material pushing claws are arranged on the surface of the first conveyor belt for pushing the scraped old asphalt pavement materials onto the second conveyor belt. The second conveyor belt is obliquely arranged outside the vehicle body for conveying the old asphalt pavement materials to the crushing unit for crushing.

[0008] Further, the road surface roughening mechanism includes a motor, a driving mechanism and a roller. The motor drives the roller to rotate through the driving mechanism. A plurality of rows of rolling teeth are arranged on the surface of the roller, and the rolling teeth are arranged at intervals in a circular shape along the length direction of the roller. The motor is controlled by the console. The driving mechanism includes a driving wheel, a belt, a driven wheel and a cam. The outer surfaces of both ends of the roller shaft of the roller are respectively abutted against two cams, and the two cams on both sides are coaxially fixed to two driven wheels respectively. One driven wheel is connected to the driving wheel through a belt, and the other driven wheel is connected to the driven wheel through a belt. The driving wheel is driven by the motor, and the driving wheel and the driven wheel are connected through a driving shaft. The driving shaft and the driven wheels are connected to the vehicle body through support rods, and the roller shaft is connected to the support rod through a buffer structure.

[0009] Further, the crushing unit includes a primary crushing device, a secondary crushing device and a pre-screening device arranged on a frame. The frame is arranged on a movable flat car. The primary crushing device is arranged on the top of the secondary crushing device, and the pre-screening device is arranged on the upper side of the primary crushing device. The feed inlet of the primary crushing device can be connected to the discharge outlet of the scraping unit. The discharge outlet of the primary crushing device is connected to the feed inlet of the secondary crushing device. The oversize outlet of the pre-screening device is connected to the feed inlet of the primary crushing device. The undersize of the pre-screening device is connected to the feed inlet of the secondary crushing device through a guide chute. The discharge outlet of the secondary crushing device can be connected to the stripping and screening unit. A material pushing mechanism is arranged at the end of the roller shaft of the primary crushing device for pushing the old asphalt pavement materials in the guide chute to the feed inlet of the secondary crushing device. The material pushing mechanism is a push rod with a material pushing shovel at the lower end. The guide chute is an arc-shaped chute inclined towards the secondary crushing device, and the cross section of the guide chute is U-shaped.

[0010] Further, the stripping and screening unit includes a movable base and a plurality of inner and outer sleeved screen cylinders spaced apart from each other at the top thereof. Each screen cylinder is used to define a cavity for accommodating the crushed old asphalt mixture. The screen cylinder is provided with screen holes that penetrate through the side wall of each screen cylinder. An outer shell is sleeved around the outer periphery of the plurality of screen cylinders, and the outer shell is used to protect the plurality of screen cylinders. A bracket is provided between the base and the outer shell. One end of the bracket is fixedly connected to the base, and the other end is movably connected to the outer shell. The outer shell is connected to the bracket through a rotating assembly, and the rotating assembly is driven to make the outer shell drive the plurality of screen cylinders to rotate along the circumferential direction of the outer shell.

[0011] Further, the plurality of screen cylinders are, from the inside to the outside, a first screen cylinder, a second screen cylinder, and a third screen cylinder in sequence. The first screen cylinder, the second screen cylinder, and the third screen cylinder are coaxially arranged and are all connected by connecting rods. The stirring assembly with a spiral structure is arranged in the first screen cylinder, and the first screen cylinder and the stirring assembly are of an integral structure. The third screen cylinder is fixedly connected to the outer shell. The size of the first screen holes on the first screen cylinder is larger than that of the second screen holes on the second screen cylinder, and the size of the second screen holes on the second screen cylinder is larger than that of the third screen holes on the third screen cylinder.

[0012] Further, it further includes a plurality of guiding plates. The plurality of guiding plates are of a U-shaped structure. Each guiding plate is fixed to one end of the first screen cylinder, the second screen cylinder, and the third screen cylinder. In the axial direction of the screen cylinder, the guiding plate extends towards the opposite direction inside the inner cavity. A storage box is provided at the bottom of the guiding plate. The storage box is provided with a plurality of storage cavities for accommodating different types of solid materials, and the same storage cavity is used to accommodate the same type of solid materials.

[0013] Further, the batching unit includes a bracket and a storage bin provided thereon. The bracket is arranged on a movable flat car. The storage bin is used to define a storage cavity for accommodating solid materials. A plurality of partition plates are installed on the storage bin, and the plurality of partition plates are arranged at intervals along the extending direction of the storage bin. A plurality of measuring devices are provided at the bottom of the storage bin for accommodating different types of solid materials, and each measuring device is used to accommodate the same type of solid materials. A mixing mechanism is provided below the measuring devices and is fixedly connected to the plurality of measuring devices through connecting pipes. The mixing mechanism is used to mix different types of solid materials.

[0014] Further, the mixing unit includes a horizontal tank body with a stirring mechanism. The tank body is arranged on a movable flat car. The bottom of the tank body is provided with a discharge port. Above the feed port at the top of the tank body is the discharge end of a conveyor. The conveyor is used to convey the solid materials discharged from the batching unit into the tank body. The top of the tank body is also provided with an emulsified asphalt pipe, a fusion agent pipe and a water pipe, which are used to input emulsified asphalt, fusion agent and water into the tank body. A weighing sensor is arranged at the bottom of the feeding belt of the conveyor. Flow meters are arranged on the emulsified asphalt pipe, the fusion agent pipe and the water pipe. The weighing sensor and the flow meters are both connected to a controller, which is used to control the input of solid materials, emulsified asphalt, fusion agent and water into the tank body according to a set ratio.

[0015] Further, the stirring mechanism is a continuous stirrer. The stirrer includes a driving component and two stirring shafts with opposite rotation directions. The driving component is arranged outside the tank body, and the two stirring shafts are arranged in parallel inside the tank body. A number of sections of helically arranged stirring blades are arranged at intervals on the stirring shafts. Wear-resistant blocks are arranged at the edges of the stirring blades. The driving component includes a stirring motor, a driving gear, a first driven gear and a second driven gear. The output shaft of the stirring motor is coaxially fixed with the driving gear. The first driven gear and the second driven gear are respectively coaxially fixed with the two stirring shafts. The first driven gear is a double-row gear. The driving gear meshes with one row of teeth of the first driven gear, and the second driven gear meshes with the other row of teeth of the first driven gear.

[0016] Compared with the prior art, the technical progress achieved by the present utility model lies in:

[0017] The present utility model shovels the old asphalt pavement through the shoveling unit and conveys the old asphalt pavement materials to the crushing unit for crushing. After crushing, the black stones wrapped with asphalt enter the stripping and screening unit to complete the separation of the stones and the asphalt film. The obtained stones enter the batching unit to complete metering and mixing and then participate in batching again, and are then conveyed to the mixing unit. Solid materials, emulsified asphalt, fusion agent and water are mixed in the mixing unit to complete the cold recycling of asphalt mixture. Finally, the asphalt mixture is conveyed to a paver for direct paving. By using the present utility model, the shoveling and crushing of the old pavement, the stripping and screening of the old stones, as well as batching and mixing can be completed on-site to realize the cold recycling of asphalt mixture. It can achieve on-site cold recycling and paving without being transferred to a factory, greatly reducing the transportation cost and time cost, improving the construction efficiency, being able to complete the rapid repair of the road surface, and reducing the traffic pressure. Description of the Drawings

[0018] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. They are used to explain the present utility model together with the embodiments of the present utility model, and do not constitute a limitation to the present utility model.

[0019] In the drawings:

[0020] Figure 1 Structural schematic diagram of an in-situ cold recycling train for asphalt pavement provided by an embodiment of the present utility model;

[0021] Figure 2 Structural schematic diagram of a scraping unit in an embodiment of the present utility model;

[0022] Figure 3 Structural schematic diagram of a material distributing claw in an embodiment of the present utility model;

[0023] Figure 4 Structural schematic diagram of a road surface roughening mechanism in an embodiment of the present utility model;

[0024] Figure 5 Cooperating schematic diagram of a support rod and a connecting seat in an embodiment of the present utility model.

[0025] Figure 6 Structural schematic diagram of a crushing unit in an embodiment of the present utility model;

[0026] Figure 7 Internal structural schematic diagram of a primary crushing device and a secondary crushing device in an embodiment of the present utility model;

[0027] Figure 8 Structural schematic diagram of a crushing unit in another embodiment of the present utility model.

[0028] Figure 9 External view of a stripping and screening unit in an embodiment of the present utility model;

[0029] Figure 10 For Figure 9 Structural schematic diagram of the stripping and screening unit in

[0030] Figure 11 For Figure 9 Front view of the stripping and screening unit in

[0031] Figure 12 Installation schematic diagram of multiple sieve drums in an embodiment of the present utility model;

[0032] Figure 13 For Figure 12 Structural schematic diagram of the first sieve drum in

[0033] Figure 14 For Figure 9 Top view of the stripping and screening unit in

[0034] Figure 15 For Figure 9 Usage state diagram of the stripping and screening unit in

[0035] Figure 16It is the external view of the batching unit in the embodiment of the present utility model;

[0036] Figure 17 It is the schematic internal structure diagram of the batching unit in the embodiment of the present utility model;

[0037] Figure 18 It is the side view of the batching unit in the embodiment of the present utility model;

[0038] Figure 19 It is the schematic structure diagram of the storage bin and the partition board in the embodiment of the present utility model;

[0039] Figure 20 It is the schematic structure diagram of the mixing mechanism in the embodiment of the present utility model.

[0040] Figure 21 It is the schematic structure diagram of the mixing unit in the embodiment of the present utility model;

[0041] Figure 22 It is the partial schematic structure diagram of the stirring shaft in the embodiment of the present utility model;

[0042] Figure 23 is Figure 22 the installation schematic diagram of the wear-resistant block on the stirring blade;

[0043] Figure 24 It is the schematic structure diagram of the driving component in the embodiment of the present utility model;

[0044] In the figure: 00 - paver;

[0045] 100 - scraping unit, 101 - first walking wheel, 102 - second walking wheel; 103 - vehicle body; 104 - scraper; 105 - cab; 106 - first conveyor belt; 107 - second conveyor belt; 108 - feeding claw, 1081 - rod body, 1082 - feeding head; 109 - lifting support leg; 110 - roller; 111 - hob; 112 - driving wheel; 113 - belt; 114 - driven wheel; 115 - cam driving wheel; 116 - driven wheel; 117 - driving shaft; 118 - support rod; 119 - gantry; 120 - cleaning brush; 121 - second spring; 122 - connecting seat; 123 - rotary brush; 124 - spray head;

[0046] 200 - Crushing unit, 201 - Primary crushing device, 211 - Primary housing, 212 - Primary toothed roll; 202 - Secondary crushing device, 221 - Secondary housing, 222 - Secondary toothed roll; 203 - Pre - screening device; 204 - Coarse material recycling device, 241 - Guide plate, 242 - Screw conveyor; 205 - Spray head; 206 - Wire brush; 207 - Third spring; 208 - Support base; 209 - Baffle plate; 210 - Screening device; 213 - Poking rod; 214 - Conveyor belt; 215 - Frame; 216 - Feed chute;

[0047] 300 - Stripping and screening unit, 301 - Base; 311 - Limit seat; 302 - Screen cylinder; 321 - Cavity; 322 - First screen cylinder; 323 - Second screen cylinder; 324 - Third screen cylinder; 303 - Screen holes; 331 - First screen hole; 332 - Second screen hole; 333 - Third screen hole; 304 - Outer shell; 35 - Stirring assembly; 306 - Support frame; 307 - Rotating assembly; 371 - Rotating shaft; 372 - Driving motor; 308 - Connecting rod; 309 - Guide plate; 310 - Storage box; 3101 - Storage cavity;

[0048] 400 - Batching unit, 401 - Bracket; 402 - Storage bin; 421 - Chute; 422 - First through - hole; 403 - Storage cavity; 404 - Measuring device; 441 - Baffle; 442 - Measuring cavity; 405 - Mixing mechanism; 451 - Body; 4511 - Second through - hole; 452 - Screw mechanism; 406 - Partition; 461 - Slide rail; 407 - Support shaft; 408 - Connecting pipe; 481 - Branch end; 482 - Main end; 409 - Seal; 410 - Vibration device; 411 - Cover plate; 4110 - Support arm;

[0049] 500 - Mixing unit, 501 - Tank body, 502 - Discharge port, 503 - Feed port, 504 - Conveyor, 505 - Emulsified asphalt pipe, 506 - Fusing agent pipe, 507 - Water pipe, 508 - Weighing sensor, 509 - Flowmeter, 510 - Driving component, 511 - Stirring shaft, 512 - Stirring blade, 513 - Wear - resistant block, 5131 - Fixed part, 5132 - Movable part; 514 - Fastening bolt; 515 - Stirring motor; 516 - Driving gear; 517 - First driven gear; 518 - Second driven gear. Detailed implementation manners

[0050] The following specific embodiments can be combined with each other. For the same or similar concepts or processes, they may not be repeated in some embodiments. The embodiments of the present invention will be described below with reference to the accompanying drawings.

[0051] As Figure 1As shown in the figure, an in-situ cold recycling train for asphalt pavement includes a mobile scarifying unit 100, a crushing unit 200, a stripping and screening unit 300, a batching unit 400, and a mixing unit 500 that are connected in sequence. The discharge port of the scarifying unit 100 is connected to the feed port of the crushing unit 200, which is used to mill the old asphalt pavement and transport it to the crushing unit 200 for crushing. The discharge port of the crushing unit 200 is connected to the feed port of the stripping and screening unit 300, which is used to transport the crushed old asphalt mixture to the stripping and screening unit 300 for stone stripping. The stone outlet of the stripping and screening unit 300 is connected to the feed port of the batching unit 400, and the discharge port of the batching unit 400 is connected to the feed port of the mixing unit 500, which is used to transport the mixed solid materials to the mixing unit 500. The mixing unit is used to mix the solid materials and liquid materials to complete the cold recycling of the asphalt mixture. The discharge port of the mixing unit 500 is arranged above the feed port of the paver 00.

[0052] In a specific embodiment of the present invention, as Figure 2 shown, the scarifying unit 100 includes a vehicle body 103 and a scraper blade 104 at the bottom that can scarify the old asphalt pavement. A cab 105 is provided on the upper part of the vehicle body 103, and a traveling mechanism is provided at the bottom. The scraper blade 104 is arranged at the front of the vehicle body 103. A recycling and conveying mechanism for collecting and transporting the old asphalt pavement materials to the crushing unit 200 is provided on the front side of the scraper blade 104. A surface roughening mechanism and a cleaning mechanism are provided on the rear side of the scraper blade 104. The scraper blade 104 is connected to a high-frequency impact component for performing high-frequency impact on the old asphalt pavement. The high-frequency impact component is controlled by the console in the cab. The recycling and conveying mechanism includes a first conveyor belt 106 and a second conveyor belt 107 controlled by the console. The first conveyor belt 106 is arranged below the vehicle body 103 and is inclined and arranged above the front side of the scraper blade 104. A row of material pushing claws 108 are provided on the surface of the first conveyor belt 106 for pushing the scarified old asphalt pavement materials onto the second conveyor belt 107. The second conveyor belt 107 is inclined and arranged outside the vehicle body 103 for transporting the old asphalt pavement materials to the crushing unit 200 for crushing. Among them, the high-frequency impact component is a hydraulic impactor or a pneumatic impactor. The old asphalt pavement is peeled and preliminarily crushed by the high-frequency vibrating scraper blade, which can meet the requirements of recycling and reduce resource waste. At the same time, the first conveyor belt and the second conveyor belt transport the scarified and preliminarily crushed old asphalt pavement materials to the crushing unit for timely recycling. Then, the surface roughening mechanism and the cleaning mechanism are used to roughen and clean the road surface, which is convenient for in-situ paving, reduces the subsequent cleaning workload, and further improves the construction efficiency.

[0053] In specific applications, the material separating claws 108 on the first conveyor belt 106 can sequentially separate the crushed old asphalt pavement materials onto the second conveyor belt 107, and the old asphalt pavement materials are conveyed into the crushing unit 200 through the inclined second conveyor belt 107, realizing the continuous processing of the old asphalt pavement materials. In addition, shields are installed around the vehicle body to enclose the shovel, the first conveyor belt, the road surface roughening mechanism, and the cleaning mechanism inside. At the same time, a spray head is installed at the discharge port of the first conveyor belt for spray dust reduction. The spray head is connected to the water tank on the vehicle body through a spray pipe with a water pump, and the start and stop of the water pump are controlled through the console.

[0054] In addition, the traveling mechanism at the bottom of the vehicle body 103 includes the first traveling wheels 101 at the rear and the second traveling wheels 102 at the front. The outer diameter of the first traveling wheels 101 is larger than that of the second traveling wheels 102. The second traveling wheels 102 are connected to the vehicle body 103 through hydraulic rods. When traveling on a normal road surface, the second traveling wheels 102 are lowered to the same plane as the first traveling wheels 101 through the hydraulic rods; during operation, the height of the second traveling wheels 102 is adjusted through the hydraulic rods so that they are on the unshoveled road surface and the first traveling wheels 101 are on the shoveled road surface to ensure that the vehicle body maintains a balanced state; at the same time, lifting legs 109 are provided on both sides of the vehicle body 103 to facilitate the support of the vehicle body 103 during maintenance.

[0055] In the specific design, as Figure 3 shown, the material separating claws 108 are connected to the first conveyor belt 106. The material separating claws 108 include a rod body 1081 and a material separating head 1082. The connecting end of the rod body 1081 is fixedly connected to the first conveyor belt 106. The other end of the rod body 1081 is provided with a wedge-shaped hole for accommodating the material separating head 1082. The wedge-shaped hole is large on the outside and small on the inside. The material separating head is in a tight fit with the wedge-shaped hole. One end of the material separating head that fits with the wedge-shaped hole is wedge-shaped, and the other end is an arc-shaped shovel. The material separating claws with this structure can shovel the crushed old asphalt pavement materials to the second conveyor belt 107 outside the machine body one by one.

[0056] In a specific embodiment of the present invention, as Figure 4As shown, the road surface roughening mechanism includes a motor (not shown in the figure), a driving mechanism, and a roller 110. The motor drives the roller 110 to rotate through the driving mechanism. A number of rows of rolling teeth 111 are provided on the surface of the roller 110. The rolling teeth 111 are arranged at intervals along the length direction of the roller 110 in a circular shape. The motor is controlled by a console. Among them, the driving mechanism includes a driving wheel 112, a belt 113, a driven wheel 114, and a cam 115. The outer surfaces of both ends of the roller shaft of the roller 110 are respectively abutted against two cams 115. The two cams 115 are respectively coaxially fixed with two driven wheels 114. One driven wheel 114 is connected to the driving wheel 112 through a belt 113, and the other driven wheel 114 is connected to a driven wheel 116 through a belt 113. The driving wheel 112 is driven by the motor, and the driving wheel 112 is connected to the driven wheel 116 through a driving shaft 117. The driving shaft 117 and the driven wheel 114 are both connected to the vehicle body 103 through a support rod 118, and the roller shaft is connected to the support rod 118 through a buffer structure. The cam is rotated by belt drive, and then the roller is driven to lift. The rotating rolling teeth continuously mill the road surface, thereby realizing the roughening treatment of the road surface.

[0057] Further optimize the above solution. As Figure 4 shown, the inner sides of the rotating shafts of the two cams 115 are connected to a gantry 119. The driven wheels 114 are arranged outside the cams 115. A row of cleaning brushes 120 is provided at the bottom of the cross beam of the gantry 119. The cleaning brushes 120 are arranged downward for cleaning the rolling teeth 111 on the surface of the roller 110. During construction, spray heads are installed at the bottom and side discharge ports of the roller to achieve dust reduction treatment. At the same time, the rolling teeth are intermittently cleaned by the cleaning brushes at the top to avoid an increase in resistance caused by too much carried slag.

[0058] During specific production, as Figure 5 shown, the buffer structure includes a second spring 121 and a connecting seat 122. The lower end of the connecting seat 122 is rotationally matched with the roller shaft. A blind hole for slidingly matching with the lower end of the support rod 118 is provided at the top of the connecting seat 122. The second spring 121 is arranged in the blind hole. The upper and lower ends of the second spring 121 are respectively connected to the support rod 118 and the bottom of the blind hole. With the help of this buffer structure, the roller can generate a buffer when contacting the road surface during rotation, avoiding direct rigid contact with the road surface and damaging the bearings at both ends.

[0059] In a specific embodiment of the present invention, as Figure 2 shown, the cleaning mechanism is a rolling brush 123 controlled by a console for cleaning the concrete slag on the road surface after roughening. The rolling brush can be inclined to sweep the concrete slag during the roughening process to the outlet on one side of the vehicle body. At the same time, a spray head 124 is installed above the outlet to avoid serious dust pollution of the surrounding environment.

[0060] In a specific embodiment of the present utility model, as Figure 6 shown, the crushing unit 200 includes a primary crushing device 201, a secondary crushing device 202, and a pre-screening device 203 provided on a frame 215. The frame 215 is provided on a movable flatbed (not shown in the figure). The primary crushing device 201 is disposed on top of the secondary crushing device 202, and the pre-screening device 203 is disposed on the upper side of the primary crushing device 201. The feed inlet of the primary crushing device 201 is disposed below the discharge outlet of the second conveyor belt 107 of the scraping unit 100. The discharge outlet of the primary crushing device 201 is connected to the feed inlet of the secondary crushing device 202. The oversize outlet of the pre-screening device 203 is connected to the feed inlet of the primary crushing device 201. The undersize of the pre-screening device 203 is connected to the feed inlet of the secondary crushing device 201 through a guide chute 216. The discharge outlet of the secondary crushing device 202 can be connected to the stripping and screening unit 300. A feeding mechanism is provided at the end of the roller shaft of the primary crushing device 201 for feeding the old asphalt pavement materials in the guide chute 216 to the feed inlet of the secondary crushing device 202. The pre-screening device can screen out small particles in the scraped old asphalt pavement materials and directly feed them into the secondary crushing device, while large particles enter the primary crushing device, which can reduce the crushing amount of the primary crushing device and lower the energy consumption. By using the power of the primary crushing device to drive the feeding mechanism, the old asphalt pavement materials in the guide chute can smoothly enter the secondary crushing device.

[0061] During specific design, as Figure 7 shown, the primary crushing device 201 includes a primary housing 211 and two first toothed rollers 212 driven to rotate relatively inside by a first motor (not shown in the figure). The gap between the two first toothed rollers 212 is 40 - 50 mm. The secondary crushing device 202 includes a secondary housing 221 and two second toothed rollers 222 driven to rotate relatively inside by a second motor (not shown in the figure). The gap between the two second toothed rollers 222 is 20 - 30 mm. The two first toothed rollers 212 are used for primary crushing of large particles, and then the two second toothed rollers 222 are used for secondary crushing, meeting the feeding requirements of the subsequent stripping equipment. Compared with using a single crushing device, it can avoid excessive energy consumption and equipment damage caused by too large a one-time crushing amount, and can effectively protect the crushing device.

[0062] As a preferred structure, a feed hopper with a larger upper part and a smaller lower part is provided at the top feed port of the secondary housing 221, and a spray head 205 is provided at the bottom of the feed hopper; two steel wire brushes 206 are symmetrically provided on both sides of the lower part of the secondary housing 221, which are used to brush off the asphalt mixture adhered to the surface of the second gear roller 222. In specific production, the steel wire brush 206 is fixed to the upper end of the brush handle, and the brush handle is connected to the support seat 208 through the third spring 207. The support seat 208 is tilted at the bottom of the inner wall of the secondary housing 221. With the help of the third spring, the root of the steel wire brush can be reduced from excessive deflection and breakage. At the same time, the lower end of the feed hopper extends into the secondary housing 222, and baffle plates 209 are symmetrically provided on both sides of the lower end of the feed hopper, and the spray head 205 is provided on the baffle plates 209. The use of a spray head can reduce dust during the crushing process, and the baffle plate can ensure that the old asphalt pavement material enters the gap between the two second tooth rollers; a wire brush can be used to promptly remove the asphalt mixture adhered to the surface of the second tooth roller 222 to ensure the crushing effect.

[0063] Further optimize the above scheme, such as Figure 8 As shown, a screening device 210 is provided below the secondary crushing device 202, and a coarse material recovery device 204 is provided between the screening device 210 and the secondary crushing device 202; the coarse material recovery device 204 includes a guide plate 241 and a screw conveyor 242, the guide plate 241 is obliquely arranged between the coarse material outlet of the screening device 210 and the feed port of the screw conveyor 242, the guide plate 241 is connected to the screening device 210; the discharge port of the screw conveyor 242 is connected to the side wall of the feed hopper. The screening device is used to screen out the larger particles in the old asphalt mixture after the secondary crushing, and returns to the secondary crushing device through the screw conveyor for further crushing.

[0064] In the specific design, the material-dispensing mechanism is a lever 213 with a material-dispensing shovel at the lower end, and the material-guiding trough 216 is an arc-shaped trough inclined toward the secondary crushing device 202; at the same time, the pre-screening device 203 and the screening device 210 are both vibrating screening machines, and the cross-sections of the material-guiding trough 216 and the material-guiding plate 241 are both U-shaped with the opening upward, and the material-guiding plate 241 is obliquely arranged on the side of the screw conveyor 242 and connected to the frame 215, and the discharge end of the material-guiding plate 241 is an arc-shaped slideway for connecting to the feed port of the screw conveyor 242. The material-guiding plate with this structure can guide the screened old asphalt mixture to the feed port of the screw conveyor, completing the recovery and transportation of the old asphalt mixture with larger particles.

[0065] If the quantity of the old asphalt mixture is large, a conveyor belt 214 is arranged below the fine material outlet of the screening device 210 to convey the crushed asphalt mixture to the stripping and screening unit 300 of the stripping process for stone stripping. Using the conveyor belt to batch-convey the old asphalt mixture to the stripping process can improve the conveying efficiency.

[0066] In a specific embodiment of the present utility model, as Figure 9 shown, the stripping and screening unit 300 includes a movable base 301 and a plurality of inner and outer sleeved screen cylinders 302 spaced apart from each other at the top thereof. Among them, the base 1 is arranged on a movable flat car, and the plurality of screen cylinders 302 are spaced apart from each other on the base 301, so that the base 301 provides stable support for the screen cylinder 02, and enables the whole device to maintain balance during operation; each of the screen cylinders 302 is used to define a cavity 321, and the cavity 321 is used to accommodate the crushed old asphalt mixture. During the operation of the device, the number of the plurality of screen cylinders 302 can be set according to the required screening fineness, so as to be able to efficiently perform the screening operation of the asphalt mixture and ensure that the asphalt mixture can be effectively classified after screening; a screen hole 303 is arranged on the screen cylinder 302, and the screen hole 302 penetrates through the side wall of each screen cylinder 302. The screen hole 303 is used to screen the particles of the asphalt mixture according to the particle size. The size and density of the screen hole 303 can be adjusted according to specific application requirements to ensure the screening effect; an outer shell 304 is sleeved around the outer periphery of the plurality of screen cylinders 302, and the outer shell 304 is coaxially arranged with the plurality of screen cylinders 302. The outer shell 304 can not only protect the plurality of screen cylinders 302 from being impacted and affected by the external environment, but also prevent the leakage of the asphalt mixture during the working process. A support frame 306 is arranged between the base 301 and the outer shell 304. One end of the support frame 306 is fixedly connected to the base 301, and the other end is movably connected to the outer shell 304; the outer shell 304 is connected to the support frame 306 through a rotating assembly 307. By driving the rotating assembly 307, the outer shell 304 can drive the plurality of screen cylinders 302 to rotate along the circumferential direction of the outer shell 304.

[0067] During specific design, the plurality of screen cylinders 302 are in a cylindrical structure, and the side wall of the cylindrical screen cylinder 302 is smooth without an included angle, so that the asphalt mixture rotates smoothly in the cylinder. The number of the screen cylinders 302 can be set to three, five, etc., and can be adaptively set according to the number of required classifications of the asphalt mixture. As Figures 9 to 15As shown, from the inside to the outside of the multiple screening cylinders 302 are the first screening cylinder 322, the second screening cylinder 323, and the third screening cylinder 324 in sequence. The first screening cylinder 322, the second screening cylinder 323, and the third screening cylinder 324 are coaxially arranged and are all connected by connecting rods 308 so as to be able to rotate synchronously, facilitating the screening of asphalt mixtures. The structure of mutual nesting is compact, effectively saving the occupied space of the device, and at the same time ensuring the improvement of screening efficiency. A stirring component 305 with a spiral structure is arranged in the first screening cylinder 322, and the first screening cylinder 322 and the stirring component 305 are of an integral structure. The third screening cylinder 324 is fixedly connected to the outer shell 304. The size of the first screening holes 331 on the first screening cylinder 322 is larger than that of the second screening holes 332 on the second screening cylinder 323, and the size of the second screening holes 332 on the second screening cylinder 323 is larger than that of the third screening holes 333 on the third screening cylinder 324.

[0068] As Figures 9 to 13 shown, the stirring component 305 has a spiral structure and can rotate synchronously during the process of processing asphalt mixtures. The stirring component 305 stirs the asphalt mixtures through rotational motion, effectively increasing the fluidity of the asphalt mixtures, promoting full contact between the asphalt mixtures, and colliding and rubbing against each other, so as to thoroughly separate the stones from the asphalt. The support frame 306 is located between the base 301 and the outer shell 304, playing a role of connection and support. One end of the support frame 306 is fixedly connected to the base 301 to ensure the stability of the entire device, and the other end is movably connected to the outer shell 304. In the assembled state, the outer shell 304 is connected to the support frame 306 through a rotating component 307. By driving the rotating component 307, the outer shell 304 drives the multiple screening cylinders 302 to rotate along the circumferential direction of the outer shell 304, making the screening process of the materials more flexible, being able to adjust the rotation speed of the screening cylinders according to actual needs, and achieving different degrees of screening effects, thereby improving the working efficiency.

[0069] In a specific embodiment of the present utility model, as Figures 9 to 13 , the asphalt material is put into the cavity 321 of the screening cylinder 302. After starting the device, the stirring component 305 drives the screening cylinder 302 to start rotating, while stirring the asphalt material and promoting the separation of the asphalt from the aggregates. With the synchronous rotation of the outer shell 304 and the screening cylinder 302, the outer shell 304 can prevent the leakage of the asphalt material, ensuring the high efficiency and cleanliness of the asphalt material processing process. The asphalt material is pressed against the side wall of the screening cylinder 302 under the action of centrifugal force, and the asphalt material is screened according to the size of the screening holes 303. The stripped asphalt material is centrally stored according to the screening grades for subsequent use or processing.

[0070] In an example, as Figure 9As shown, in the assembled state, a stirring assembly 305 is provided in the first sieve cylinder 322. The stirring assembly 305 fully stirs the asphalt mixture through rotational movement to help separate the asphalt from the stones, thereby ensuring the fluidity and uniform distribution of the asphalt mixture and accelerating the screening speed of the asphalt mixture. It can also effectively avoid the accumulation and caking of the asphalt mixture in the sieve cylinder 302, improving work efficiency. The main function of the second sieve cylinder 323 is to further subdivide the asphalt mixture screened by the first sieve cylinder 322, enabling more precise separation of asphalt mixtures of different particle sizes. The third sieve cylinder 324 is fixedly connected to the outer shell 304 to ensure that it does not displace or shake during operation, enhancing the overall safety of the device. At the same time, the outer shell 304 effectively protects the sieve cylinder 302, reducing the influence of the external environment on the sieve cylinder 302 and further extending the service life of the sieve cylinder 302.

[0071] In some embodiments, as Figure 12 and Figure 13 shown, the sieve holes 303 can be any one or more of square, circular, and polygonal structures, as long as they can screen the asphalt mixture into different grades. There is no further limitation in this application. Among them, the first sieve cylinder 322 has first sieve holes 331, the second sieve cylinder 323 has second sieve holes 332, and the third sieve cylinder 324 has third sieve holes 333. The size of the first sieve holes 331 is larger than that of the second sieve holes 332, and the size of the second sieve holes 332 is larger than that of the third sieve holes 333. For example, when the aperture of the first sieve holes 331 is 10 - 15 mm, coarse-grained stones can be screened out; when the aperture of the second sieve holes 332 is 4 - 10 mm, medium-grained stones can be screened out; when the aperture of the third sieve holes 333 is 0 - 4 mm, fine-grained stones can be screened out. During the operation of the device, the first sieve cylinder 322 is mainly used to screen out large-grained stones. The stirring assembly 305 of the first sieve cylinder 322 can also strip the initial asphalt mixture and assist the first sieve cylinder 322 to complete the preliminary screening function. The remaining stones fall into the second sieve cylinder 23. The second sieve cylinder 323 is mainly responsible for screening out medium-sized stone particles from the already stripped asphalt mixture to further improve the screening accuracy. The third sieve cylinder 324 screens out the remaining fine-grained stones and drops the powder or finer stones onto the outer shell. The setting of multiple sieve cylinders provides a multi-stage screening function, which can classify stones of different particle sizes, improve the screening accuracy, and make the stripping and screening process more efficient, avoiding the phenomena of material retention and uneven screening.

[0072] In some embodiments, as Figure 9As shown, it further includes a plurality of guide plates 309 to enhance the separation and collection efficiency of the stones. The plurality of guide plates 309 are in a U-shaped structure. The U-shaped guide plates 309 not only increase the flow channels of the stones but also effectively reduce the leakage of the stones. Each guide plate 309 is fixed to one end of the first sieve cylinder 322, the second sieve cylinder 323, and the third sieve cylinder 324, thus forming an effective guiding system. In the axial direction of the sieve cylinder 302 (such as Figure 9 the y direction shown in

[0073] In some embodiments, continuing to refer to Figure 9 and Figure 10 , a storage box 310 is provided at the bottom of the guide plate 309. The storage box 310 is provided with a plurality of storage cavities 3101. The partitions between the plurality of storage cavities 3101 are obvious. The plurality of storage cavities 101 are used to accommodate stones of different grades, and the same storage cavity is used to accommodate stones of the same gradation, so that stones of different gradations can be stored independently, avoiding the risks of mixing and damage, thus facilitating centralized processing and subsequent use.

[0074] In some embodiments, as Figures 9 to 15 shown, the rotating assembly 307 includes a rotating shaft 371 and a driving motor 372. The output end of the driving motor 372 is connected to the rotating shaft 371. The rotating shaft 371 is installed on the support seat of the base 301 to have good stability and support force during operation. And the outer shell 304 is in tooth connection with the rotating shaft 371 to ensure the smooth progress of the screening process. The driving motor 372 is turned on so that the rotating shaft 371 drives the first sieve cylinder 322, the second sieve cylinder 323, and the third sieve cylinder 324 to rotate along the circumferential direction of the rotating shaft 371 at the same time, so as to be able to strip and screen the asphalt, thereby improving the working efficiency and accuracy.

[0075] In some embodiments, as Figure 9 and Figure 15 shown, the support frames 306 are located at both ends of the outer shell 304. In the assembled state, when the asphalt mixture is screened and stripped, the heights of the support frames 306 at both ends are adjusted so that the support frames 306 simultaneously move along the thickness direction of the base 301 (such as Figure 15extends or contracts up and down in the z - direction (as shown), at this time, the axis of the outer shell 304 is parallel to the extended length of the base 301. Start the driving motor, so that the sieve cylinder 302 drives the stirring assembly 305 to rotate. At the same time, under the action of the stirring assembly 305, the asphalt mixture is peeled off and falls into the corresponding sieve cylinder 302 according to grades for screening. When different - grade stones are screened out from the asphalt mixture, adjust the positions of the sieve cylinder 302 and the outer shell 304 so that the outer shell 304 is inclined relative to the base 301, facilitating the screened stones to fall into the corresponding storage cavity 3101 through the guiding plate 309 for subsequent use and processing.

[0076] In some embodiments, continuing to refer to Figure 9 and Figure 15 , a limit seat 311 is provided on the base 301. The limit seat 311 is rotatably connected to the outer shell 304 through a bearing, enabling the limit seat 311 to rotate freely relative to the outer shell 304 within a certain range, thus realizing flexible structural adjustment. In the assembled state, there is a preset angle between the outer shell 304 and the limit seat 311. The preset angle is 0° - 60°. When screening asphalt materials, the preset angle is 0°, making the outer shell 304 and the sieve cylinder 302 parallel to the base 301 to facilitate screening and prevent asphalt material leakage. When centralized storage is required after screening, the preset angle is 50°, making the outer shell 304 and the sieve cylinder 302 inclined relative to the base 301, facilitating the stones in the sieve cylinder 302 to flow into the corresponding storage cavity 3101 of the storage box 310 through the guiding plate 309, thus ensuring the stability and reliability of the device, and further enhancing the overall operation flexibility and adaptability.

[0077] The working principle of the above - mentioned peeling and screening unit is as follows:

[0078] As Figures 9 to 15As shown in the figure, first, the asphalt mixture is put into the cavity 321 of the first sieve cylinder 322. After starting the device, the sieve cylinder 302 and the stirring assembly 305 rotate simultaneously, causing the asphalt mixture to rotate and stir, and promoting the separation of asphalt and stone. The outer shell 304 outside the sieve cylinder 302 can prevent the leakage of the asphalt mixture, ensuring the efficiency and cleanliness of the screening process. With the synchronous rotation of multiple sieve cylinders 302, the asphalt mixture is pressed against the side wall of the sieve cylinder 302 under the action of centrifugal force. While stirring, larger stone particles begin to be screened and stripped through the first sieve holes 331 of the first sieve cylinder 322. The preliminarily stripped stones are then sent into the second sieve cylinder. After entering the second sieve cylinder 323, the remaining stone particles are further screened. The second sieve holes 332 of the second sieve cylinder 323 are relatively small, which can effectively separate medium-sized aggregates. Finally, the remaining particles enter the third sieve cylinder 324 to screen out fine stones again. The third sieve holes 333 of the third sieve cylinder 324 are the finest, mainly used for screening the smallest stone particles or powders. Since the third sieve cylinder 324 is fixedly connected to the outer shell 304, the smallest stone particles or powders fall into the outer shell 304. During the rotation process, the entire device can maintain stability. At the same time, the protection function of the outer shell 304 can also ensure the safety and smooth progress of the screening process. Finally, by adjusting the inclination angle of the sieve cylinder 302, the stones sorted by the sieve cylinder are collected by the guide plate 309 into the corresponding storage cavity 3101 in the storage box 310 for subsequent use or centralized treatment.

[0079] In a specific embodiment of the present utility model, as Figure 16 shown, the batching unit 400 includes a bracket 401 and a storage bin 402 provided thereon. The bracket 401 is arranged on a movable flat car (not shown in the figure). The storage bin 402 is used to define a storage cavity 403. The storage cavity 403 can accommodate solid materials. A plurality of partition plates 406 are installed on the storage bin 402. The plurality of partition plates 406 are arranged at intervals along the extending direction of the storage bin 402 (as Figure 16in the y - direction shown; at the bottom of the storage bin 402, there are multiple measuring devices 404. The multiple measuring devices 404 are used to hold different types of solid materials, and each measuring device 404 is used to hold the same type of solid material; below the measuring device 404, there is a mixing mechanism 405, which is fixedly connected to the multiple measuring devices 404 through a connecting pipe 408; the mixing mechanism 405 is used to mix different types of solid materials. Among them, the bracket 401 is used to support the structural stability of the entire device, ensuring that there will be no tilting or shaking during operation. The bracket 401 is usually made of high - strength materials, so as to be able to withstand weight and vibration, such as steel frames, aluminum alloy frames, etc. Multiple partitions 406 can divide the storage cavity 403 into multiple independent areas, so that different types of solid materials can be accommodated simultaneously. The solid materials can be any one or a combination of multiple types, such as stone materials (aggregates) with different gradations, mineral powder, etc., to ensure that various solid materials are independently accommodated without mixing with each other, facilitating subsequent accurate weighing and mixing.

[0080] Multiple measuring devices 404 are installed at the bottom of the storage bin 402. The multiple measuring devices 404 are used to hold different types of solid materials, and each measuring device 404 is used to hold the same type of solid material, so that different types of solid materials can be accurately quantified in a certain proportion. The mixing mechanism 405 is located below the measuring device 404 and is fixedly connected to the multiple measuring devices 404 through a connecting pipe 408. In the assembled state, the drive system will operate the measuring device 404 to collect different types of solid materials in proportion to the mixing mechanism 405. The mixing mechanism 405 has strong stirring and can quickly and evenly mix different types of solid materials, facilitating subsequent processing and use.

[0081] In some embodiments, as Figures 16 to 19 shown, there are multiple sliding grooves 421 provided on the inner wall of the storage bin 402. The multiple sliding grooves 21 extend along the height direction of the storage bin 402 (in the z - direction shown Figure 16 ). The number of sliding grooves 421 can be adaptively set according to requirements, such as four, six, etc. In this regard, there are no excessive restrictions in this application. On both sides of the multiple partitions 406, there are sliding rails 461. The sliding rails 461 are matched with the sliding grooves 421, so that the multiple partitions 406 are slidably connected to the storage bin 402, enabling the partitions 406 to freely slide inside the storage bin 402 to be divided into multiple independent areas. Operators can set the number of different partitions 6 to change the space and number of independent areas of the storage bin 402, so as to meet the requirements of the types and quantities of ingredients, and further make the storage bin 402 flexible and practical.

[0082] In some embodiments, continue to refer to Figures 16 to 20The measuring device 404 is rotatably connected to the bracket 401 through the support shaft 407 so that the measuring device 404 is rotatably connected to the bracket 401 along the circumferential direction of the support shaft 407 (such as Figure 17 The measuring device 404 is rotated in the direction (as shown in FIG1 ), thereby enhancing the convenience of operation and the measurement accuracy of the device, wherein a seal 409 is provided on the bottom of the measuring device 404 or the storage bin 402. In one example, in order to ensure the sealing between the measuring device 404 and the storage bin 402 and avoid the influence of external factors on the ingredients, a seal 409 is provided on the bottom of the storage bin 402. The seal 409 not only effectively prevents the intrusion of impurities such as dust and moisture, but also reduces the wear of the device. During the operation of the device, different types of solid materials in the storage bin 402 are placed in the measuring device 404, and the solid materials can be directly placed in the measuring device 404. According to the proportion of the solid materials, the rotation angle of the measuring device 404 is adjusted, and a small amount of solid materials are transported to the connecting pipe 408 for multiple times and mixed, so that the measuring device 404 and the storage bin 402 can form an efficient, accurate and reliable measurement system.

[0083] In some embodiments, Figure 17 As shown, the measuring device 404 is cross-arranged by baffles 441 to form a plurality of metering chambers 442, and the size of the metering chambers 442 can be adaptively set as required to meet the quantitative requirements of the ingredients. Each metering chamber 442 is connected to the storage bin 402 or the connecting pipe 408. In one example, the measuring device 404 is divided into four metering chambers 442 by a baffle 441, and each metering chamber 442 serves as a metering unit, that is, the measuring device 404 is rotated, and several metering chambers 442 are rotated according to the required ratio. The metering chamber 442 above the measuring device 404 is connected to the first through hole 422 of the storage bin 402, and the metering chamber 442 below the measuring device 404 is connected to the connecting pipe 408. For example, the solid material is aggregate and mineral powder of different grades in a ratio of 3:1:2. The measuring device 404 containing the solid material rotates three metering chambers 442, the measuring device 404 containing stones of different grades rotates one metering chamber 442, and the measuring device 404 containing mineral powder ingredients rotates two metering chambers 442, and the three ingredients are directly dropped into the mixing mechanism 405 through the connecting pipe 408 for mixing.

[0084] In some embodiments, Figures 16 to 18 As shown, the measuring device 404 is connected to the inside of the mixing mechanism 405 through a connecting pipe 408. The connecting pipe 408 has multiple branch ends 481 and a main end 482. The branch end 481 is connected to the metering chamber 442 of the measuring device 404, and the main end 482 is connected to the mixing mechanism 405, so that different types of ingredients in the storage bin 402 can be accurately transported by the measuring device 404 to the connecting pipe 408 in a certain proportion, and then fall into the mixing mechanism 405 through the main end 482 again for stirring and mixing.

[0085] In some embodiments, such as Figures 16 to 20 shown, the mixing mechanism 405 includes a body 451 and a screw mechanism 452. The body 451 can withstand the pressure and friction under different working conditions, and at the same time provide a stable operating environment. The screw mechanism 452 is placed inside the body 451. The screw mechanism 452 is responsible for promoting the uniform distribution of different types of ingredients during the mixing process. The top of the body 451 has a second through hole 4511, and the second through hole 4511 matches the total end 482 of the connecting pipe 408, facilitating the direct transportation of solid materials into the mixing mechanism 405, avoiding omission and external environmental interference, and thus ensuring the quality of the asphalt mixture.

[0086] In the assembled state, the drive system of the mixing mechanism 405 is started to drive the screw mechanism 452 to rotate. The screw mechanism 452, through its unique geometric shape and rotational movement, enables the uniform mixing of different types of solid materials. At the same time, the operator only needs to monitor the operating state of the device to ensure that the ingredients are accurately transported in accordance with the predetermined ratio, and adjust the mixing speed and time as needed to achieve the ideal mixing effect.

[0087] In some embodiments, such as Figure 17 and Figure 18 shown, it further includes a vibration device 410. The vibration device 410 effectively assists in the transportation and mixing of solid materials, avoids the adhesion of ingredients to the device during transportation, causing blockage of the device, and at the same time can uniformly mix the ingredients to ensure the quality of the asphalt mixture. The vibration device 410 is located between the connecting pipe 408 and the mixing mechanism 405. In one example, the vibration device 410 is located on the connecting pipe 408 to prevent the adhesion of ingredients to the side wall of the connecting pipe 408. In another example, the vibration device 410 is located on the mixing mechanism 405 to assist the mixing mechanism to mix more uniformly. The vibration device 410 can be a vibrator, a pneumatic arch breaking device, etc., as long as it can solve the problems of ingredient transportation and mixing. In this regard, this application does not impose too many restrictions.

[0088] In some embodiments, such as Figures 16 to 18As shown, a cover plate 411 is flip - set at the top of the storage bin 402. A support arm 4110 is bent at the free end of the cover plate 411. When the cover plate 411 is opened, the support arm 4110 provides additional support and stability, ensuring that the cover plate 411 will not move randomly under the influence of external wind force or other factors, thereby enhancing the safety and convenience of use of the storage bin 402. In one example, the operator adjusts the appropriate position through the support arm 4110 to adapt to different opening angles. When in use, the operator only needs to give a gentle push, and the cover plate 411 will smoothly flip open, facilitating the inspection of the interior of the storage bin 402 or the addition of ingredients. When not in use, the cover plate 411 is closed to ensure that the interior of the storage bin 402 is not affected by the outside, and at the same time, it also avoids the spread of dust into the air, effectively ensuring the environment.

[0089] The working principle of the above - mentioned batching unit is as follows:

[0090] As Figures 16 to 20 shown, first, according to the types of different solid materials, the corresponding partition plates 406 are slidably connected to the storage bin 402 to create independent areas. At the same time, the number of independent areas can meet the quantity of different types of solid materials. Then, the cover plate 411 is opened, and different types of solid materials are placed into the storage bin 402. The cover plate 411 is closed to ensure that the dust generated during the operation of the device is not easily scattered into the air, causing environmental pollution. After that, the solid materials in the storage bin 402 are distributed to each measuring device 404. Before starting the device, the proportion of each solid material is set, that is, according to the proportion, the measuring device 404 rotates a corresponding number of measuring cavities 442 around the circumferential direction of the support shaft 407. For example, the ratio is 1:2, where 1 means rotating one measuring cavity 442 and 2 means rotating two measuring cavities 442, so as to ensure the accuracy of batching. Then, different types of ingredients are transported to the connecting pipe 408 through the branch end 481 according to the ratio for collection. During operation, the vibration device 410 between the connecting pipe 408 and the mixing mechanism 405 can help the ingredients to be smoothly transported and can avoid the blockage of the device by the ingredients, thus ensuring the normal operation and safety of the device. Finally, it flows into the mixing mechanism 405 through the main end 482 of the connecting pipe 408, and the spiral mechanism 452 of the mixing mechanism 405 is used for uniform mixing to form asphalt mixture, ensuring the quality and practicability of the asphalt mixture. Finally, the asphalt mixture is transported to the storage area for subsequent use and processing.

[0091] In a specific embodiment of the present invention, as Figure 21As shown in the figure, the mixing unit 500 includes a horizontal tank body 501 with a stirring mechanism. The tank body 501 is arranged on a movable flat car (not shown in the figure). A discharge port 502 is provided at the bottom of the tank body 501. Above the feed inlet 503 at the top of the tank body 501 is the discharge end of a conveyor 504, and the conveyor 504 is used to convey the solid materials discharged from the batching unit 400 into the tank body 501. An emulsified asphalt pipe 505, a fusion agent pipe 506, and a water pipe 507 are also provided at the top of the tank body 501 for inputting emulsified asphalt, fusion agent, and water into the tank body 501. A weighing sensor 508 is provided at the bottom of the feeding belt of the conveyor 504, and flow meters 509 are provided on the emulsified asphalt pipe 505, the fusion agent pipe 506, and the water pipe 507. The weighing sensor 508 and the flow meters 509 are both connected to a controller (not shown in the figure) for controlling the input of solid materials, emulsified asphalt, fusion agent, and water into the tank body 501 in a set proportion. The addition proportions of solid materials, emulsified asphalt, fusion agent, and water are as follows:

[0092] 85 - 100 parts of solid materials, 0.3 - 2.5 parts of emulsified asphalt, 0.02 - 0.3 parts of fusion agent, and 1.0 - 4.5 parts of water. The fusion agent includes the following components: 25 - 40 parts of aromatic oil, 1 - 10 parts of silane coupling agent, 15 - 35 parts of light oil, 1 - 8 parts of petroleum resin, and 5 - 16 parts of asphalt emulsifier. The fusion agent can be used to age and restore the original asphalt coated on the surface of the old stones, which can improve the compatibility between the new and old asphalt and produce asphalt mixtures meeting the technical requirements.

[0093] Among them, the silane coupling agent can be selected as n-octyltriethoxysilane, and the asphalt emulsifier can be selected as cetyltrimethylammonium bromide. Of course, other silane coupling agents and asphalt emulsifiers can also be selected.

[0094] As a preferred structure, as Figure 21 、 22 shown, the stirring mechanism is a continuous stirrer; the stirrer includes a driving component 510 and two stirring shafts 511 with opposite rotation directions. The driving component 510 is arranged outside the tank body 501, and the two stirring shafts 511 are arranged in parallel inside the tank body 501; a number of sections of helically arranged stirring blades 512 are provided at intervals on the stirring shafts 511, and wear-resistant blocks 513 are provided at the edges of the stirring blades 512 to effectively protect the stirring blades. Through the uniform and continuous stirring of the two stirring shafts, the internal materials can be fully mixed, thus ensuring the cold recycling quality of the asphalt mixture.

[0095] During specific production, as Figure 23As shown, the wear-resistant block 513 includes a fixed part 5131 and a detachable movable part 5132. The fixed part 5131 is welded and fixed to the edge of the stirring blade 512. One end of the fixed part 5131 is provided with a wedge-shaped groove for installing the movable part 5132. The movable part 5132 is a wedge-shaped block matching the wedge-shaped groove. One end of the movable part 5132 extends to the outside of the wedge-shaped groove of the fixed part 5131 and has the same rotation direction as the stirring blade 512. The arrow in the figure indicates the rotation direction of the stirring shaft. During the rotation of the stirring shaft, the movable part can be more and more tightly embedded in the wedge-shaped groove of the fixed part. During installation, the bottom of the fixed part 5131 and the movable part 5132 are connected and fixed by a fastening bolt 514, further improving the firmness of the movable part during stirring. During specific production, the length of the wear-resistant block is not limited to that shown in the figure. It can be selected to be slightly smaller than the arc edge length of the corresponding stirring blade to protect the stirring blade as much as possible and avoid serious wear on its edge.

[0096] Since there are stones in the asphalt mixture in the tank body, the stones will cause serious wear to the edge of the stirring blade during the rotation of the stirring shaft. After installing the wear-resistant block, the wear-resistant block will contact the material first, which can effectively protect the stirring blade and extend the service life of the stirring blade. When the movable part is severely worn, the fastening bolt can be removed, and a special rod can be used to pass through the bolt hole at the bottom of the fixed part to push the movable part out of the wedge-shaped groove of the fixed part, and then the movable part can be replaced. The wear-resistant block with this structure plays a protective role for the stirring blade, and at the same time, it is convenient and fast to replace the movable part.

[0097] In a specific embodiment of the present invention, as Figure 24 shown, the driving component 510 includes a stirring motor 515, a driving gear 516, a first driven gear 517 and a second driven gear 518. The output shaft of the stirring motor 515 is coaxially fixed with the driving gear 516. The first driven gear 517 and the second driven gear 518 are respectively coaxially fixed with two stirring shafts 511. The first driven gear 517 is a double-row gear. The driving gear 516 meshes with one row of teeth of the first driven gear 517, and the second driven gear 518 meshes with the other row of teeth of the first driven gear 517. Among them, the number of teeth in the two rows of the double-row gear can be adjusted according to actual needs. Using a double-row gear can obtain a larger transmission ratio, high strength, low noise, smooth transmission, can withstand a large torque and load, and has a long service life. By driving the driving gear to rotate by the stirring motor, the driving gear then drives the first driven gear to rotate, and the first driven gear then drives the second driven gear to rotate in the opposite direction, thereby driving the two stirring shafts to rotate in the opposite direction.

[0098] In summary, the utility model has the advantages of compact structure and rapid construction. Each unit adopts a mobile structure, which is flexible and convenient to apply. It can be transferred at any time according to different working locations, realizing the cleaning of the old asphalt pavement, the on-site treatment of the old asphalt pavement materials, and the reuse of the stripped stones in the mixing process to achieve cold recycling. The prepared asphalt mixture can be directly paved on-site without curing, realizing the in-situ cold recycling of the asphalt pavement, which can be completed without transfer, improving the construction efficiency and greatly reducing the traffic pressure during the opening to traffic. Using the utility model can reduce the consumption of new road construction materials, reduce pollution and energy consumption, improve the construction efficiency, and realize the in-situ cold recycling of the asphalt pavement. It is an important means and urgent need to achieve the sustainable development of highway transportation.

[0099] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the scope of protection of the claims of the present utility model.

Claims

1. An in-situ cold recycling train for asphalt pavement, characterized in that: It includes a mobile milling unit, a crushing unit, a stripping and screening unit, a batching unit, and a mixing unit connected in sequence. The discharge port of the milling unit is connected to the feed port of the crushing unit, which is used for milling the old asphalt pavement and transporting it to the crushing unit; the discharge port of the crushing unit is connected to the feed port of the stripping and screening unit, which is used for transporting the crushed old asphalt mixture to the stripping and screening unit for stone stripping; the stone outlet of the stripping and screening unit is connected to the feed port of the batching unit, and the discharge port of the batching unit is connected to the feed port of the mixing unit, which is used for transporting the mixed solid materials to the mixing unit. The mixing unit is used for mixing the solid materials with liquid materials to complete the cold recycling of asphalt mixture; the discharge port of the mixing unit is arranged above the feed port of the paver.

2. The in-situ cold recycling train for asphalt pavement according to claim 1, characterized in that: The milling unit includes a vehicle body and a milling cutter at the bottom capable of milling the old asphalt pavement. A cab is provided at the upper part of the vehicle body, and a traveling mechanism is provided at the bottom. The milling cutter is arranged at the front of the vehicle body. A recycling and conveying mechanism for collecting and transporting the old asphalt pavement materials to the crushing unit is provided on the front side of the milling cutter. A road surface roughening mechanism and a cleaning mechanism are provided on the rear side of the milling cutter; the milling cutter is connected to a high-frequency impact assembly for performing high-frequency impact on the old asphalt pavement; the high-frequency impact assembly is controlled by a console in the cab; the recycling and conveying mechanism includes a first conveyor belt and a second conveyor belt controlled by the console. The first conveyor belt is arranged below the vehicle body and is inclined and arranged above the front side of the milling cutter. Rows of material pushing claws are provided on the surface of the first conveyor belt for pushing the milled old asphalt pavement materials onto the second conveyor belt; the second conveyor belt is inclined and arranged outside the vehicle body for transporting the old asphalt pavement materials to the crushing unit for crushing.

3. The in-situ cold recycling train for asphalt pavement according to claim 2, characterized in that: The road surface roughening mechanism includes a motor, a driving mechanism, and a roller. The motor drives the roller to rotate through the driving mechanism; a number of rows of rolling teeth are provided on the surface of the roller, and the rolling teeth are arranged at intervals in a circular shape along the length direction of the roller; the motor is controlled by the console; the driving mechanism includes a driving wheel, a belt, a driven wheel, and a cam. The outer surfaces of both ends of the roller shaft are respectively abutted against two cams. The two cams on both sides are coaxially fixed to two driven wheels respectively. One driven wheel is connected to the driving wheel through a belt, and the other driven wheel is connected to the driven wheel through a belt; the driving wheel is driven by the motor, and the driving wheel and the driven wheel are connected through a driving shaft; the driving shaft and the driven wheel are both connected to the vehicle body through support rods, and the roller shaft is connected to the support rod through a buffer structure.

4. A kind of in-situ cold recycling train for asphalt pavement according to claim 1, characterized in that: The crushing unit includes a primary crushing device, a secondary crushing device, and a pre-screening device provided on a frame. The frame is provided on a movable flatbed. The primary crushing device is arranged on the top of the secondary crushing device, and the pre-screening device is arranged on the upper side of the primary crushing device. The feed inlet of the primary crushing device can be connected to the discharge outlet of the scraping unit. The discharge outlet of the primary crushing device is connected to the feed inlet of the secondary crushing device. The oversize outlet of the pre-screening device is connected to the feed inlet of the primary crushing device. The undersize of the pre-screening device is connected to the feed inlet of the secondary crushing device through a guiding chute. The discharge outlet of the secondary crushing device can be connected to the feed inlet of the stripping and screening unit. A feeding mechanism is provided at the end of the roller shaft of the primary crushing device for feeding the old asphalt pavement materials in the guiding chute to the feed inlet of the secondary crushing device. The feeding mechanism is a lever with a feeding shovel at the lower end. The guiding chute is an arc-shaped chute inclined towards the secondary crushing device, and the cross-section of the guiding chute is U-shaped.

5. A kind of in-situ cold recycling train for asphalt pavement according to claim 1, characterized in that: The stripping and screening unit includes a movable base and a plurality of concentrically arranged inner and outer screen cylinders spaced apart at the top. Each screen cylinder is used to define a cavity for accommodating the crushed old asphalt mixture. Screen holes are provided on the screen cylinder, and the screen holes penetrate through the side walls of each screen cylinder. An outer shell is sleeved around the outer periphery of the plurality of screen cylinders for protecting the plurality of screen cylinders. A bracket is provided between the base and the outer shell. One end of the bracket is fixedly connected to the base, and the other end is movably connected to the outer shell. The outer shell is connected to the bracket through a rotating assembly, and the rotating assembly is driven to cause the outer shell to drive the plurality of screen cylinders to rotate along the circumferential direction of the outer shell.

6. The in-situ cold recycling train for asphalt pavement according to claim 5, characterized in that: The first screen cylinder, the second screen cylinder, and the third screen cylinder are arranged in sequence from the inside to the outside of the plurality of screen cylinders. The first screen cylinder, the second screen cylinder, and the third screen cylinder are coaxially arranged and are all connected by connecting rods. A stirring assembly with a spiral structure is provided in the first screen cylinder, and the first screen cylinder and the stirring assembly are an integral structure. The third screen cylinder is fixedly connected to the outer shell. The size of the first screen holes on the first screen cylinder is larger than that of the second screen holes on the second screen cylinder, and the size of the second screen holes on the second screen cylinder is larger than that of the third screen holes on the third screen cylinder.

7. The in-place cold recycling train for asphalt pavement according to claim 6, characterized in that: It also includes a plurality of guiding plates. The plurality of guiding plates are in a U-shaped structure. Each guiding plate is fixed to one end of the first screen cylinder, the second screen cylinder, and the third screen cylinder. In the axial direction of the screen cylinder, the guiding plate extends towards the opposite direction inside the cavity. A storage box is provided at the bottom of the guiding plate. The storage box is provided with a plurality of storage cavities for accommodating different types of solid materials, and the same storage cavity is used to accommodate the same type of solid materials.

8. The in-situ cold recycling train for asphalt pavement according to claim 1, characterized in that: The batching unit includes a bracket and a storage bin provided thereon. The bracket is arranged on a movable flat car. The storage bin is used to define a storage cavity which can accommodate solid materials. A plurality of partitions are installed on the storage bin, and the plurality of partitions are arranged at intervals along the extending direction of the storage bin. A plurality of measuring devices are provided at the bottom of the storage bin, and the plurality of measuring devices are used to accommodate different types of solid materials, and each measuring device is used to accommodate the same type of solid materials. A mixing mechanism is provided below the measuring devices and is fixedly connected to the plurality of measuring devices through connecting pipes. The mixing mechanism is used to mix different types of solid materials.

9. A kind of in-situ cold recycling train for asphalt pavement according to any one of claims 1-8, characterized in that: The mixing unit includes a horizontal tank body with a stirring mechanism. The tank body is arranged on a movable flat car. An outlet is provided at the bottom of the tank body. Above the inlet at the top of the tank body is the discharge end of a conveyor, and the conveyor is used to convey the solid materials discharged from the batching unit into the tank body. An emulsified asphalt pipe, a fluxing agent pipe and a water pipe are further provided at the top of the tank body for inputting emulsified asphalt, fluxing agent and water into the tank body. A weighing sensor is provided at the bottom of the feeding belt of the conveyor, and flow meters are provided on the emulsified asphalt pipe, the fluxing agent pipe and the water pipe. The weighing sensor and the flow meters are both connected to a controller for controlling the input of solid materials, emulsified asphalt, fluxing agent and water into the tank body according to a set ratio.

10. A kind of in-situ cold recycling train for asphalt pavement according to claim 9, characterized in that: The stirring mechanism is a continuous stirrer. The stirrer includes a driving component and two stirring shafts with opposite rotation directions. The driving component is arranged outside the tank body, and the two stirring shafts are arranged in parallel inside the tank body. A plurality of sections of helically arranged stirring blades are provided at intervals on the stirring shafts, and wear-resistant blocks are provided at the edges of the stirring blades. The driving component includes a stirring motor, a driving gear, a first driven gear and a second driven gear. The output shaft of the stirring motor is coaxially fixed to the driving gear, and the first driven gear and the second driven gear are respectively coaxially fixed to the two stirring shafts. The first driven gear is a double-row gear, the driving gear meshes with one row of teeth of the first driven gear, and the second driven gear meshes with the other row of teeth of the first driven gear.

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