Local milling, regenerating and repairing system for asphalt pavement and construction method of local milling, regenerating and repairing system

Abstract

The invention provides an asphalt pavement local planing and milling regeneration repair system and a construction method thereof. The regeneration repair system comprises planing and milling equipment; the planing and milling equipment comprises a planing and milling moving vehicle body, a cutting device, a planing and milling device, a collecting device and a dust suction device, the planing and milling device comprises a planing and milling roller and containing cavities evenly distributed in the planing and milling roller in the circumferential direction, form relieved teeth are arranged on one side of each containing cavity, small rollers are further arranged at the two ends of the planing and milling roller, and containing cavities and form relieved teeth are further arranged on the small rollers. The collecting device comprises a collecting hopper arranged on one side of the planing and milling roller and a lifting conveying mechanism arranged on one side of the collecting hopper, a large waste storage bin and a particle waste storage box are arranged on the planing and milling moving trolley body, the large waste storage bin is connected with the lifting conveying mechanism, and the particle waste storage box is connected with the dust suction device. The technical problem that equipment capable of continuously completing the process from precise planing and milling to old material recycling is lacked in existing asphalt pavement local repairing is solved.

Description

Technical Field

[0001] This invention relates to the field of asphalt pavement maintenance technology, and in particular to an asphalt pavement local milling and regeneration repair system and its construction method. Background Technology

[0002] When asphalt pavements exhibit localized ruts, potholes, or other defects, on-site recycling after partial milling is an advanced maintenance method that is efficient, environmentally friendly, and maintains material consistency. This process typically involves precisely milling the affected area, rapidly regenerating the removed old asphalt mixture (RAP) on-site by adding recycling agents and new materials, and then backfilling the damaged area with the regenerated hot-mix asphalt mixture and compacting it.

[0003] However, the equipment system currently relied upon for implementing this technology has significant shortcomings. In actual operation, the entire process is broken down into multiple discrete steps, each completed by different independent equipment and manual labor: first, small milling machines or cutting machines are used to treat and remove the boundaries of the damaged area; then, intermittent mixing equipment or mobile recycling machines are used to recycle and mix the RAP; finally, small pavers and rollers are used for paving and compaction. This model requires the combined operation of multiple specialized machines and relies heavily on manual labor for process coordination, material transfer, and quality control, resulting in complex construction organization, low efficiency, and the uniformity of the entire repair surface quality is greatly affected by human factors.

[0004] More importantly, current technologies lack a highly integrated, dedicated on-site repair equipment capable of continuously completing the entire process from precision milling, old material recycling, immediate regeneration to paving and compaction. This lack of equipment hinders the full realization of the advantages of localized milling and regeneration processes and restricts their large-scale application in the rapid maintenance of high-grade roads. Therefore, developing a dedicated on-site repair equipment capable of integrated operation, reduced manual intervention, and ensuring uniform and stable repair quality has become an urgent need to improve the technological level and construction efficiency in this field. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a local milling and recycling repair system for asphalt pavements and its construction method, which solves the technical problem of the lack of equipment capable of continuously completing the process from precise milling to old material recycling in existing local asphalt pavement repair.

[0006] An embodiment of the present invention describes a partial milling and regeneration repair system for asphalt pavement, comprising milling equipment;

[0007] The milling equipment includes a milling mobile carriage and a cutting device, a milling device, a collecting device and a dust collection device arranged sequentially at the bottom of the milling mobile carriage.

[0008] The milling device includes a milling roller and accommodating chambers evenly distributed on the milling roller. A shovel tooth is provided on one side of the accommodating chamber. The tilt angle of the shovel tooth when it contacts the ground is 20-40°. Small rollers are also provided at both ends of the milling roller. The small rollers are also provided with accommodating chambers and shovel teeth.

[0009] The collection device includes a collection hopper located on one side of the milling roller and a lifting and conveying mechanism located on one side of the collection hopper. The milling mobile vehicle is equipped with a large waste storage bin and a granular waste storage bin. The large waste storage bin is connected to the lifting and conveying mechanism, and the granular waste storage bin is connected to a dust collection device.

[0010] The technical principle of this invention is as follows: the asphalt pavement is cut by the cutting device at the bottom of the milling machine. After the cutting is completed, the subsequent milling device removes the asphalt mixture at the cut point and collects it into a large waste storage bin through a collection device. Finally, the dust removal device sucks away the small asphalt particles and dust left at the cut point. In other words, the process of cutting, milling, old material collection and foreign object removal in the local repair of asphalt pavement is completed by a single milling machine. It can also be understood as completing all the work before the repair. The milling machine is based on the milling machine, so it can be remotely operated by a single person without the need for multiple people to cooperate.

[0011] Meanwhile, the present invention is equipped with two rollers of different diameters, a milling roller and a small roller, so that a stepped structure can be formed at the cutting edge, and the stepped structure can improve the bonding strength of the new and old asphalt mixture in subsequent recycling and repair.

[0012] The present invention employs a structure in which shovel teeth cooperate with the cavity on the milling roller and the small roller, and by limiting the tilt angle of the shovel teeth when in contact with the ground to 20-40°, the present invention can peel off more complete asphalt mixture blocks compared with traditional milling or crushing technical solutions, reduce the generation of powder and debris, and thus improve the recycling rate of asphalt mixture.

[0013] Compared with the prior art, the present invention has the following beneficial effects: by the cooperation of the cutting device, milling device, collection device and dust collection device set at the bottom of the milling mobile vehicle, it solves the technical problem of the lack of equipment in the existing local repair of asphalt pavement that can continuously complete the process from precise milling to old material recycling.

[0014] Furthermore, the cutting device includes a cutting shaft and a cutting motor that is drivenly connected to the cutting shaft. The cutting motor is installed at the bottom of the milling moving car body. Main cutting wheels are symmetrically arranged on the cutting shaft, and auxiliary cutting wheels are also provided on one side away from each other of the two main cutting wheels.

[0015] The two main cutting wheels are respectively aligned with the two end faces of the milling roll, and the two auxiliary cutting wheels are respectively aligned with the end faces of the two small rolls that are far apart from each other. The diameter of the small rolls is less than or equal to the diameter of the auxiliary cutting wheels, the diameter of the main cutting wheels is greater than the diameter of the auxiliary cutting wheels, and the diameter of the main cutting wheels is equal to the diameter of the milling roll.

[0016] The main cutting wheel, in conjunction with the milling roller, ensures that only the asphalt mixture within the cutting area is effectively removed; the auxiliary cutting wheel, in conjunction with the small roller, removes different thicknesses of material from the edge of the main cutting wheel, ensuring that the intact asphalt pavement on the outer side is not affected.

[0017] Furthermore, a heating device is provided between the cutting device and the milling device. The heating device includes a heating cover and multiple infrared heating rods disposed inside the heating cover. The heating cover is installed at the bottom of the milling moving vehicle.

[0018] The heating cover is equipped with rolling rods on both sides near the cutting and milling devices, a protective net is provided at the bottom of the heating cover, and an insulation layer is provided at the connection between the heating cover and the milling moving vehicle.

[0019] By installing a heating device to heat the asphalt pavement after cutting, it softens and becomes easier for the milling device to remove.

[0020] Furthermore, the milling device also includes a milling motor, with two milling motors respectively located on both sides of the milling moving body. The small roller has transmission rods at both ends, which are rotatably connected to the milling moving body and connected to the gears of the milling motor.

[0021] By setting up two milling motors, the overall load capacity of the milling rollers is made more uniform.

[0022] Furthermore, the milling device also includes a universal milling mechanism, and a connecting rod is provided between the universal milling mechanism and the milling roller. One end of the connecting rod is connected to the transmission rod by a universal coupling, and the other end of the connecting rod is connected to the center of the universal milling mechanism. The universal milling mechanism includes a roller body and milling teeth evenly distributed on the roller body.

[0023] A universal milling mechanism is installed on one side of the small roller position, which can be used to remove asphalt mixture that is inclined at the edge of the road.

[0024] Furthermore, the lifting and conveying mechanism includes a lifting bucket and a lifting rod disposed at the center of the lifting bucket. The lifting rod is provided with a helical edge, and a lifting motor is drivenly connected to the top of the lifting rod. The lifting bucket is mounted on the milling moving car body.

[0025] The planer-milling mobile vehicle has a crushing channel at its bottom, which connects a lifting bucket and a collection hopper. The crushing channel is equipped with a crushing roller. The lifting bucket has a feed inlet corresponding to the crushing channel, and the top of the lifting bucket has a discharge outlet connected to a large waste storage bin.

[0026] Large pieces of asphalt mixture are crushed into smaller pieces by crushing rollers in the crushing channel. Finally, the asphalt mixture is conveyed to a large waste storage bin by a spiral edge for storage, which facilitates subsequent recycling.

[0027] Furthermore, the dust collection device includes a vacuum cleaner installed on top of the granular waste storage box and a dust collection plate installed at the bottom of the milling moving vehicle. The dust collection plate is evenly distributed with dust collection holes, and a dust collection channel connecting all the dust collection holes is provided inside the dust collection plate. The two ends of the dust collection channel are respectively connected to the vacuum cleaner, and the vacuum cleaner is connected to the granular waste storage box.

[0028] By connecting the vacuum cleaner to the suction channels on both sides, the suction force on the entire suction plate is made as uniform as possible, so as to remove small particles of asphalt and dust from the cut area and ensure the cleanliness of the road surface in the area to be repaired.

[0029] Meanwhile, the waste in the pellet waste storage bin can be centrally stored and sent to the factory, where it can be filtered for dust and then recycled.

[0030] Furthermore, the asphalt pavement partial milling and recycling repair system also includes recycling equipment used in conjunction with the milling equipment;

[0031] The recycling equipment includes a recycling mobile vehicle and an inclined conveying device disposed on one side of the recycling mobile vehicle. The recycling mobile vehicle is equipped with a mixing tank. The top of the inclined conveying device is connected to the mixing tank. The bottom of the mixing tank is provided with an openable and closable discharge port. The discharge port extends out of the bottom of the recycling mobile vehicle. The bottom of the recycling mobile vehicle is provided with a rake bar and a pressure roller on both sides of the discharge port. Both the rake bar and the pressure roller are provided with a height adjustment mechanism.

[0032] The mixing drum has a stirring rod at its center, a stirring motor at the top of the stirring rod, a protruding edge at the top of the mixing drum, and a weighing device between the protruding edge and the regeneration mobile vehicle body. The weighing device is wirelessly connected to a weighing calculation system.

[0033] The bottom of the mixing tank is equipped with a heating device, and a heat insulation layer is provided between the weighing device and the convex edge.

[0034] The technical principle of this invention is as follows: the asphalt mixture in the large waste storage silo is poured onto the inclined conveyor, which outputs the asphalt mixture into the mixing drum for heating. Then, the missing asphalt material and recycling agent are added, and the mixture is stirred evenly with a stirring rod before reuse.

[0035] At the same time, by setting up a weighing device in conjunction with a remote weighing and calculation system, the missing asphalt material and recycling agent can be calculated, avoiding errors caused by manual calculation.

[0036] This invention integrates a rake, a pressure roller, a mixing drum, a mixing rod, and a heating device onto a mobile recycling vehicle, thus completing the steps of mixing, discharging, rakeing, and rolling in a single recycling device, thereby completing the entire process from asphalt mixture recycling to paving.

[0037] Furthermore, the height adjustment mechanism includes a connecting frame and a support column. The support column is located at the bottom of the regeneration mobile vehicle body. The middle of the connecting frame is provided with a hinge rod that is hinged to the support column. The rake and the pressure roller are respectively located on both sides of the connecting frame. An electric push rod is provided on the connecting frame near the pressure roller. The electric push rod is installed at the bottom of the regeneration mobile vehicle body.

[0038] An electric actuator can control the extension state of the slack rod and the pressure roller; at the same time, when the pressure roller is extended, the electric actuator can also increase the downward pressure of the pressure roller, thereby improving the efficiency of roller-pressed asphalt mixture.

[0039] A construction method for a partial milling and recycling repair system for asphalt pavement according to an embodiment of the present invention includes:

[0040] S1. Cutting the asphalt layer: Cutting is carried out on the asphalt pavement using a cutting device. The cutting width is the width of the milling vehicle, and the cutting length covers the length of the damaged pavement.

[0041] S2, Large-block asphalt stripping: Using milling rollers and shovel teeth, the asphalt mixture on the asphalt pavement that has been cut on both sides is gradually shoveled up and the shoveled asphalt mixture is sent into the collection hopper; at the same time, small rollers and shovel teeth remove the asphalt pavement surface near the cut, forming a stepped structure;

[0042] S3. Asphalt mixture crushing and storage: The asphalt mixture in the collection hopper is crushed and sent to the large waste storage silo for storage by a lifting and conveying mechanism.

[0043] S4. Small particle asphalt collection: Small particles of asphalt and dust are sucked into the particle waste storage box by a dust collection device to ensure that there are no foreign objects on the ground where the asphalt has been stripped.

[0044] S5. Repeat steps S1-S4 until the damaged road surface is completely covered in the width direction, forming a rectangular structure;

[0045] S6. Perform steps S1-S5 once on both sides of the width of the rectangular structure in step S5, so that all four sides of the rectangular structure form a stepped structure.

[0046] S7. Mixed Recycling: Place or pour the asphalt mixture from the large waste storage bin onto the inclined conveyor, allowing the inclined conveyor to send the asphalt mixture into the mixing drum; then start the heating device to heat the asphalt mixture in the mixing drum;

[0047] Then the weighing device weighs the mass of the fed asphalt mixture and sends it to the weighing calculation system, which calculates the missing asphalt material and recycling agent.

[0048] Finally, add the calculated missing asphalt material and recycling agent and stir until evenly mixed to obtain recycled asphalt mixture;

[0049] S8. Laying fibers: This step is performed simultaneously with or before step S7. In the rectangular structure of step S6, crisscrossing fiber filaments are laid, with both ends of the fiber filaments located on the stepped structure.

[0050] S9. Roller-pressed asphalt paving: Move the recycled mobile vehicle to the rectangular structure and discharge the mixed recycled asphalt mixture from the outlet around the edge of the rectangular structure; then use a rake to spread the recycled asphalt mixture from the edge to the center, and finally use a roller to flatten the recycled asphalt mixture.

[0051] At the same time, the missing asphalt material and recycling agent are calculated by using a weighing device in conjunction with a weight calculation system. Compared with manual calculation, the calculation is more accurate, which can ensure zero excess material and the repaired asphalt pavement has better overall smoothness. Attached Figure Description

[0052] Figure 1 This is a schematic diagram of the milling and planing equipment according to Embodiment 1 of the present invention.

[0053] Figure 2 This is a schematic diagram of the milling device according to Embodiment 1 of the present invention.

[0054] Figure 3 This is a cross-sectional view of the small roller in Embodiment 1 of the present invention.

[0055] Figure 4 This is a schematic diagram of the cutting device according to Embodiment 1 of the present invention.

[0056] Figure 5 This is a schematic diagram of the heating device according to Embodiment 1 of the present invention.

[0057] Figure 6 This is a schematic diagram of the collection device according to Embodiment 1 of the present invention.

[0058] Figure 7 This is a schematic diagram of the connection structure of the dust collection plate in Embodiment 1 of the present invention.

[0059] Figure 8 This is a schematic diagram of the regeneration device according to Embodiment 1 of the present invention.

[0060] Figure 9 This is a schematic diagram of the connection structure of the inclined conveying device in Embodiment 1 of the present invention.

[0061] Figure 10 This is a schematic diagram of the connection structure between the rake bar and the pressure roller in Embodiment 1 of the present invention.

[0062] Figure 11 This is a schematic diagram of the wheel structure in Embodiment 1 of the present invention.

[0063] Figure 12 This is a schematic diagram of the wheel structure from below in Embodiment 1 of the present invention.

[0064] Figure 13 This is a schematic diagram of the fiber arrangement structure in Embodiment 1 of the present invention.

[0065] Figure 14 This is a schematic diagram of the asphalt material stacking position in Embodiment 1 of the present invention.

[0066] Figure 15 This is a schematic diagram of the installation position of the weighing device in Embodiment 2 of the present invention.

[0067] Figure 16 This is a schematic diagram of the universal milling mechanism in Embodiment 3 of the present invention.

[0068] In the above figures: 1. Milling machine moving body; 11. Cutting device; 111. Cutting shaft; 112. Cutting motor; 113. Main cutting wheel; 114. Auxiliary cutting wheel; 12. Heating device; 121. Heating cover; 122. Infrared heating rod; 123. Rolling rod; 124. Protective net; 125. Insulation layer; 13. Milling machine; 131. Milling motor; 132. Milling roller; 133. Receiving chamber; 134. Shovel teeth; 135. Small roller; 136. Transmission rod; 137. Universal milling machine. Mechanism; 138. Connecting rod; 139. Universal coupling; 14. Collection device; 141. Collection hopper; 142. Lifting bucket; 143. Lifting rod; 144. Spiral edge; 145. Lifting motor; 15. Dust collection device; 151. Dust collector; 152. Dust collection plate; 153. Dust collection hole; 154. Dust collection channel; 16. Moving mechanism; 161. Moving plate; 162. Lifting push rod; 17. Large waste storage bin; 18. Granular waste storage box; 19. Crushing channel; 191. Crushing roller;

[0069] 2. Recycling mobile vehicle body; 21. Inclined conveyor device; 211. Conveyor belt; 212. Hopper; 22. Mixing tank; 221. Discharge port; 222. Protruding edge; 223. Weighing device; 224. Weighing calculation system; 225. Insulation layer; 23. Mixing rod; 24. Mixing motor; 25. Heating wire; 26. Rake bar; 27. Pressure roller; 28. Height adjustment mechanism; 281. Connecting frame; 282. Support column; 283. Electric actuator;

[0070] 3. Wheels; 31. Drive motor; 32. Steering push rod; 33. Lifting structure;

[0071] 4. Stepped structure; 41. Fiber filaments; 42. Recycled asphalt mixture. Detailed Implementation

[0072] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0073] Example 1

[0074] like Figure 1 , 8 The asphalt pavement partial milling and recycling repair system shown includes milling equipment and recycling equipment used in conjunction with the milling equipment.

[0075] like Figure 1 As shown, the milling equipment includes a milling mobile carriage 1 and a cutting device 11, a heating device 12, a milling device 13, a collecting device 14 and a dust collection device 15 arranged sequentially at the bottom of the milling mobile carriage 1.

[0076] like Figure 2-3 As shown, the milling device 13 includes a milling motor 131, a milling roller 132, and a circumferentially distributed receiving chamber 133 on the milling roller 132. A shovel tooth 134 is provided on one side of the receiving chamber 133. The tilt angle of the shovel tooth 134 when it contacts the ground is 20-40°. Small rollers 135 are also provided at both ends of the milling roller 132. The small rollers 135 are also provided with receiving chambers 133 and shovel teeth 134. Specifically, there are two milling motors 131, which are respectively provided on both sides of the milling moving carriage 1. The small rollers 135 are provided with transmission rods 136 at both ends. The transmission rods 136 and the milling moving carriage 1 are rotatably connected by bearing seats. The transmission rods 136 are connected to the milling motor 131 by gears.

[0077] like Figure 4As shown, the cutting device 11 includes a cutting shaft 111 and a cutting motor 112 that is connected to the cutting shaft 111. The cutting motor 112 is installed at the bottom of the milling moving carriage 1. The cutting shaft 111 is installed at the bottom of the milling moving carriage 1 using a bearing seat. The cutting shaft 111 is symmetrically provided with main cutting wheels 113. The two main cutting wheels 113 are also provided with auxiliary cutting wheels 114 on the side away from each other. Specifically, the two main cutting wheels 113 are respectively aligned with the two end faces of the milling roller 132, and the two auxiliary cutting wheels 114 are respectively aligned with the end faces of the two small rollers 135 that are away from each other.

[0078] Specifically, the diameter of the small roller 135 is less than or equal to the diameter of the auxiliary cutting wheel 114, the diameter of the main cutting wheel 113 is greater than the diameter of the auxiliary cutting wheel 114, and the diameter of the main cutting wheel 113 is equal to the diameter of the milling roller 132, to ensure accurate thickness of the asphalt pavement stripped.

[0079] like Figure 2-4 As shown, the milling mobile carriage 1 is provided with two moving mechanisms 16. Both moving mechanisms 16 include a moving plate 161 and a lifting push rod 162 disposed between the moving plate 161 and the milling mobile carriage 1. The lifting push rod 162 moves in the vertical direction. The cutting device 11 and the milling equipment are respectively installed on the two moving plates 161, so that the cutting device 11 and the milling equipment can adjust the cutting and scraping depth.

[0080] like Figure 5 As shown, the heating device 12 includes a heating cover 121 and multiple infrared heating rods 122 disposed inside the heating cover 121. The heating cover 121 is installed at the bottom of the milling moving vehicle 1 by springs. Specifically, the heating cover 121 is provided with rolling rods 123 on both sides near the cutting device 11 and the milling device 13 to ensure that the heating cover 121 is closest to the ground but does not contact the ground. The bottom of the heating cover 121 is provided with a protective net 124 to protect the infrared heating rods 122. The infrared heating rods 122 are used to generate heat to heat the asphalt pavement. The connection between the heating cover 121 and the milling moving vehicle 1 is provided with a heat insulation layer 125 for heat preservation to ensure that the temperature inside the heating cover 121 is sufficient to soften the asphalt.

[0081] like Figure 1 , 6As shown, the collection device 14 includes a collection hopper 141 disposed on one side of the milling roller 132 and a lifting and conveying mechanism disposed on one side of the collection hopper 141. The milling mobile vehicle 1 is equipped with a large waste storage bin 17 and a granular waste storage bin 18. The large waste storage bin 17 is connected to the lifting and conveying mechanism. Specifically, the lifting and conveying mechanism includes a lifting bucket 142 and a lifting rod 143 disposed at the center of the lifting bucket 142. A spiral edge 144 is welded and fixed on the lifting rod 143. A lifting motor 145 is drivenly connected to the top of the lifting rod 143. The lifting bucket 142 is mounted on the milling mobile vehicle. On the body 1, the bottom of the milling moving vehicle 1 is provided with a crushing channel 19. The crushing channel 19 is connected to the lifting bucket 142 and the collection bucket 141. The crushing channel 19 is provided with a crushing roller 191. The crushing roller 191 is evenly distributed with crushing teeth. The crushing roller 191 is driven by a crushing motor, which can crush the asphalt mixture blocks and at the same time give the asphalt mixture a force to move into the lifting bucket 142. The lifting bucket 142 is provided with a feed inlet corresponding to the crushing channel 19. The top of the lifting bucket 142 is provided with a discharge outlet, which is connected to the large waste storage bin 17, forming a complete bottom-up conveying.

[0082] like Figure 1 , 7 As shown, the pellet waste storage box 18 is connected to the dust collection device 15. The dust collection device 15 includes a dust collector 151 installed on the top of the pellet waste storage box 18 and a dust collection plate 152 installed on the bottom of the milling moving vehicle 1. The dust collection plate 152 has dust collection holes 153 evenly distributed on it. The dust collection plate 152 has a dust collection channel 154 that connects all the dust collection holes 153. The two ends of the dust collection channel 154 are respectively connected to the dust collector 151 through pipes. The dust collector 151 is connected to the pellet waste storage box 18 to form a dust collection system.

[0083] like Figure 8 As shown, the recycling equipment includes a recycling mobile vehicle body 2 and an inclined conveyor device 21 disposed on one side of the recycling mobile vehicle body 2. A mixing tank 22 is disposed inside the recycling mobile vehicle body 2. The top of the inclined conveyor device 21 is connected to the mixing tank 22. The bottom of the mixing tank 22 is provided with an openable and closable discharge port 221, which extends out of the bottom of the recycling mobile vehicle body 2. A mixing rod 23 is disposed in the center of the mixing tank 22. A mixing motor 24 is disposed at the top of the mixing rod 23 for mixing the asphalt mixture. A heating device is disposed at the bottom of the mixing tank 22 for heating. The heating device is an electric heating wire 25.

[0084] like Figure 9 As shown, the inclined conveyor device 21 is an inclined conveyor belt 211, and the bottom of the conveyor belt 211 is provided with a conical hopper 212. One side of the large waste storage bin 17 is provided with an openable structure. After it is opened, the asphalt mixture can be pushed into the conical hopper 212 by hand with a shovel.

[0085] like Figure 1, 10 As shown, at the bottom of the recycling mobile vehicle body 2, on both sides of the discharge port 221, there are rakes 26 and pressure rollers 27 respectively. The rakes 26 are evenly distributed with rake teeth. Both the rakes 26 and the pressure rollers 27 are equipped with height adjustment mechanisms 28. The specific height adjustment mechanism 28 includes a connecting frame 281 and a support column 282. The support column 282 is located at the bottom of the recycling mobile vehicle body 2. The connecting frame 281 is provided with a hinge rod in the middle and is hinged to the support column 282. The rakes 26 and the pressure rollers 27 are respectively located on both sides of the connecting frame 281. An electric push rod 283 is provided on the connecting frame 281 near the pressure rollers 27. The electric push rod 283 is installed at the bottom of the recycling mobile vehicle body 2 and can drive the entire connecting frame 281 to rotate around the support column 282, so as to realize the up and down movement of the rakes 26 and the pressure rollers 27.

[0086] like Figure 1 , 8 As shown in Figures 11-12, the recycling mobile vehicle body 2 and the milling mobile vehicle body 1 are symmetrically equipped with three wheels 3 on both sides of the bottom, for a total of six wheels 3. Each wheel 3 is individually connected to a drive motor 31 and a steering push rod 32. Each wheel 3 is connected to the recycling mobile vehicle body 2 or the milling mobile vehicle body 1 by a lifting structure 33. The lifting structure 33 can drive the wheel 3, drive motor 31 and steering push rod 32 to descend or rise synchronously. The lifting structure 33 can be an electric push rod. The lifting can ensure that the bottom of the recycling mobile vehicle body 2 and the milling mobile vehicle body 1 is parallel to the road surface to be repaired. With the six wheels 3, even if one wheel 3 encounters a sunken road surface and becomes suspended, the recycling mobile vehicle body 2 or the milling mobile vehicle body 1 will not tilt.

[0087] The construction method of the asphalt pavement partial milling and recycling repair system of this application includes:

[0088] S1. Cutting the asphalt layer: The cutting device 11 is used to cut the asphalt pavement. The cutting width is the width of the milling moving vehicle 1, and the cutting length covers the length of the damaged pavement. Of course, the cutting depth needs to be determined before cutting. Then, the position of the moving mechanism 16 at the cutting device 11 is adjusted to ensure the accuracy of the cutting depth.

[0089] Once the cutting length covers the length of the damaged road surface, the cutting device 11 needs to be retracted via the moving mechanism 16.

[0090] Then, the heating device 12 heats the road surface at the cut point to between 90°C and 110°C, so that the asphalt road surface is in a softened but not easily sticky state, thus preventing it from sticking to the shovel teeth 134 later.

[0091] S2, Large-scale asphalt stripping: The asphalt mixture on the asphalt pavement cut on both sides is gradually shoveled up by the milling roller 132 and the shovel teeth 134, and the shoveled asphalt mixture is sent into the collection hopper 141; at the same time, the small roller 135 and the shovel teeth 134 remove the asphalt pavement surface near the cut, forming a stepped structure 4; similarly, the position of the moving mechanism 16 at the milling device 13 needs to be adjusted to ensure the accuracy of the milling depth.

[0092] Once the milling length covers the length of the damaged road surface, the milling device 13 needs to be retracted via the moving mechanism 16.

[0093] S3. Asphalt mixture crushing and storage: First, the large pieces of asphalt mixture in the collection hopper 141 are crushed into smaller pieces by crushing rollers. Finally, the crushed asphalt mixture is sent to the large waste storage bin 17 for storage by a lifting and conveying mechanism.

[0094] S4. Small particle asphalt collection: The small particles of asphalt and dust are sucked into the particle waste storage box 18 by the dust suction device 15 to ensure that there are no foreign objects on the ground where the asphalt is stripped.

[0095] S5. Repeat steps S1-S4 until the damaged road surface is completely covered in the width direction, forming a rectangular structure. During this cycle, the wheel 3 on one side of the milling moving vehicle 1 is located on the milled road surface. Therefore, there will be a height difference between the two sides of the road surface, so the height position of the wheel 3 needs to be adjusted.

[0096] Similarly, in steps S1-S4, when wheel 3 needs to pass through a damaged road surface, depending on whether it will cause the milling machine body 1 to tilt, if it will, wheel 3 needs to be raised or lowered.

[0097] S6. Perform steps S1-S4 on both sides of the width of the rectangular structure in step S5, so that the four sides of the rectangular structure form a stepped structure 4. Similarly, in this step, the wheel 3 on one side of the milling moving car body 1 is located on the milled road surface, so there will be a height difference on both sides of the road surface, so the height position of the wheel 3 needs to be adjusted.

[0098] S7. Mixed Recycling: The asphalt mixture in the large waste storage bin 17 is placed or poured onto the inclined conveyor 21, which then sends the asphalt mixture into the mixing drum 22. The heating wire 25 is then activated to heat the asphalt mixture in the mixing drum 22. After manually calculating the missing asphalt material and recycling agent content, the missing asphalt material and sufficient recycling agent are added and stirred until the mixture is uniform, thus obtaining recycled asphalt mixture.

[0099] S8. Laying Fibers; This step is performed simultaneously with or before step S7. Interlaced fiber filaments 41 are laid within the rectangular structure of step S6, with both ends of the fiber filaments 41 located on the stepped structure 4. The fiber filaments 41 can be carbon fiber filaments 41, polyester fiber filaments 41, etc. Figure 13 As shown.

[0100] S9. Roller-compacted asphalt paving: The recycled mobile vehicle 2 is moved to the rectangular structure, and the mixed recycled asphalt mixture 42 is discharged from the outlet 221 around the edge of the rectangular structure, forming a... Figure 14 As shown; then the recycled asphalt mixture 42 is raked from the edge to the center using the raking bar 26, and finally the recycled asphalt mixture 42 is flattened using the pressure roller 27.

[0101] Example 2

[0102] like Figure 15 As shown, the difference between this embodiment and embodiment 1 is that: the top of the mixing tank 22 is provided with a protruding edge 222, a weighing device 223 is provided between the protruding edge 222 and the regeneration mobile vehicle body 2, and a heat insulation layer 225 is provided between the weighing device 223 and the protruding edge 222 to ensure that the weighing device 223 will not overheat. Specifically, the weighing device 223 includes multiple weighing sensors, and the weighing device 223 is wirelessly connected to a weighing calculation system 224 to transmit weight data to the weighing calculation system 224. The weighing calculation system 224 can be a computer or a mobile phone.

[0103] The method in this embodiment differs from that in embodiment 1 in that: in step S7, the mass of the fed asphalt mixture is weighed by the weighing device 223 and sent to the weighing calculation system 224. Before the weighing calculation system 224 calculates, it is necessary to manually measure the length, width, and depth of the rectangular structure planed in steps S1-S6, as well as the length, width, and depth of the steps, i.e. the missing volume of asphalt mixture. Finally, it is also necessary to input the mix proportion data of the asphalt mixture. Combining these values ​​with the weight values ​​weighed by the weighing device 223, the missing asphalt material and recycling agent are calculated. Finally, the calculated missing asphalt material and recycling agent are added and stirred until they are mixed evenly to obtain recycled asphalt mixture.

[0104] Example 3

[0105] like Figure 16 As shown, the difference between this embodiment and embodiment 1 is that the milling device 13 further includes a universal milling mechanism 137. A connecting rod 138 is provided between the universal milling mechanism 137 and the milling roller 132. One end of the connecting rod 138 is connected to the transmission rod 136 by a universal coupling 139, and the other end of the connecting rod 138 is connected to the center of the universal milling mechanism 137. The universal milling mechanism 137 includes a roller body and milling teeth evenly distributed on the roller body, which can mill the inclined parts of the asphalt pavement edge.

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A partial milling and regeneration repair system for asphalt pavement, characterized in that: Including milling and planing equipment; The milling equipment includes a milling mobile carriage and a cutting device, a milling device, a collecting device and a dust collection device arranged sequentially at the bottom of the milling mobile carriage. The milling device includes a milling roller and accommodating chambers evenly distributed on the milling roller. A shovel tooth is provided on one side of the accommodating chamber. The tilt angle of the shovel tooth when it contacts the ground is 20-40°. Small rollers are also provided at both ends of the milling roller. The small rollers are also provided with accommodating chambers and shovel teeth. The collection device includes a collection hopper located on one side of the milling roller and a lifting and conveying mechanism located on one side of the collection hopper. The milling mobile vehicle is equipped with a large waste storage bin and a granular waste storage bin. The large waste storage bin is connected to the lifting and conveying mechanism, and the granular waste storage bin is connected to a dust collection device.

2. The asphalt pavement partial milling and recycling repair system as described in claim 1, characterized in that: The cutting device includes a cutting shaft and a cutting motor that is drivenly connected to the cutting shaft. The cutting motor is installed at the bottom of the milling moving car body. Main cutting wheels are symmetrically arranged on the cutting shaft. Auxiliary cutting wheels are also provided on one side away from each other of the two main cutting wheels. The two main cutting wheels are respectively aligned with the two end faces of the milling roll, and the two auxiliary cutting wheels are respectively aligned with the end faces of the two small rolls that are far apart from each other. The diameter of the small rolls is less than or equal to the diameter of the auxiliary cutting wheels, the diameter of the main cutting wheels is greater than the diameter of the auxiliary cutting wheels, and the diameter of the main cutting wheels is equal to the diameter of the milling roll.

3. The asphalt pavement partial milling and recycling repair system as described in claim 2, characterized in that: A heating device is provided between the cutting device and the milling device. The heating device includes a heating cover and multiple infrared heating rods disposed inside the heating cover. The heating cover is installed at the bottom of the milling moving vehicle. The heating cover is equipped with rolling rods on both sides near the cutting and milling devices, a protective net is provided at the bottom of the heating cover, and an insulation layer is provided at the connection between the heating cover and the milling moving vehicle.

4. The asphalt pavement partial milling and recycling repair system as described in claim 1, characterized in that: The milling device also includes a milling motor. Two milling motors are respectively located on both sides of the milling moving body. The small roller has transmission rods at both ends. The transmission rods are rotatably connected to the milling moving body and are connected to the gears of the milling motors.

5. The asphalt pavement partial milling and recycling repair system as described in claim 4, characterized in that: The milling device also includes a universal milling mechanism. A connecting rod is provided between the universal milling mechanism and the milling roller. One end of the connecting rod is connected to the transmission rod by a universal coupling, and the other end of the connecting rod is connected to the center of the universal milling mechanism. The universal milling mechanism includes a roller body and milling teeth evenly distributed on the roller body.

6. The asphalt pavement partial milling and recycling repair system as described in claim 1, characterized in that: The lifting and conveying mechanism includes a lifting bucket and a lifting rod disposed at the center of the lifting bucket. The lifting rod is provided with a spiral edge, and a lifting motor is drivenly connected to the top of the lifting rod. The lifting bucket is mounted on the milling moving car body. The planer-milling mobile vehicle has a crushing channel at its bottom, which connects a lifting bucket and a collection hopper. The crushing channel is equipped with a crushing roller. The lifting bucket has a feed inlet corresponding to the crushing channel, and the top of the lifting bucket has a discharge outlet connected to a large waste storage bin.

7. The asphalt pavement partial milling and recycling repair system as described in claim 1, characterized in that: The dust collection device includes a vacuum cleaner installed on top of the granular waste storage box and a dust collection plate installed at the bottom of the milling moving vehicle. The dust collection plate has dust collection holes evenly distributed on it, and a dust collection channel connecting all the dust collection holes is provided inside the dust collection plate. The two ends of the dust collection channel are respectively connected to the vacuum cleaner, and the vacuum cleaner is connected to the granular waste storage box.

8. A partial milling and regeneration repair system for asphalt pavement as described in any one of claims 1-7, characterized in that: The asphalt pavement partial milling and recycling repair system also includes recycling equipment used in conjunction with the milling equipment; The recycling equipment includes a recycling mobile vehicle and an inclined conveying device disposed on one side of the recycling mobile vehicle. The recycling mobile vehicle is equipped with a mixing tank. The top of the inclined conveying device is connected to the mixing tank. The bottom of the mixing tank is provided with an openable and closable discharge port. The discharge port extends out of the bottom of the recycling mobile vehicle. The bottom of the recycling mobile vehicle is provided with a rake bar and a pressure roller on both sides of the discharge port. Both the rake bar and the pressure roller are provided with a height adjustment mechanism. The mixing drum has a stirring rod at its center, a stirring motor at the top of the stirring rod, a protruding edge at the top of the mixing drum, and a weighing device between the protruding edge and the regeneration mobile vehicle body. The weighing device is wirelessly connected to a weighing calculation system. The bottom of the mixing tank is equipped with a heating device, and a heat insulation layer is provided between the weighing device and the convex edge.

9. The asphalt pavement partial milling and recycling repair system as described in claim 8, characterized in that: The height adjustment mechanism includes a connecting frame and a support column. The support column is located at the bottom of the recycling mobile vehicle. The middle of the connecting frame is provided with a hinge rod that is hinged to the support column. The rake and pressure roller are respectively located on both sides of the connecting frame. An electric push rod is provided on the connecting frame near the pressure roller. The electric push rod is installed at the bottom of the recycling mobile vehicle.

10. The construction method of the asphalt pavement partial milling and recycling repair system as described in claim 8, characterized in that: include: S1. Cutting the asphalt layer: Cutting is carried out on the asphalt pavement using a cutting device. The cutting width is the width of the milling vehicle, and the cutting length covers the length of the damaged pavement. S2, Large-block asphalt stripping: Using milling rollers and shovel teeth, the asphalt mixture on the asphalt pavement that has been cut on both sides is gradually shoveled up and the shoveled asphalt mixture is sent into the collection hopper; at the same time, small rollers and shovel teeth remove the asphalt pavement surface near the cut, forming a stepped structure; S3. Asphalt mixture crushing and storage: The asphalt mixture in the collection hopper is crushed and sent to the large waste storage silo for storage by a lifting and conveying mechanism. S4. Small particle asphalt collection: Small particles of asphalt and dust are sucked into the particle waste storage box by a dust collection device to ensure that there are no foreign objects on the ground where the asphalt has been stripped. S5. Repeat steps S1-S4 until the damaged road surface is completely covered in the width direction, forming a rectangular structure; S6. Perform steps S1-S5 once on both sides of the width of the rectangular structure in step S5, so that all four sides of the rectangular structure form a stepped structure. S7. Mixed Recycling: Place or pour the asphalt mixture from the large waste storage bin onto the inclined conveyor, allowing the inclined conveyor to send the asphalt mixture into the mixing drum; then start the heating device to heat the asphalt mixture in the mixing drum; Then the weighing device weighs the mass of the fed asphalt mixture and sends it to the weighing calculation system, which calculates the missing asphalt material and recycling agent. Finally, add the calculated missing asphalt material and recycling agent and stir until evenly mixed to obtain recycled asphalt mixture; S8. Laying fibers: This step is performed simultaneously with or before step S7. In the rectangular structure of step S6, crisscrossing fiber filaments are laid, with both ends of the fiber filaments located on the stepped structure. S9. Roller-pressed asphalt paving: Move the mobile recycling vehicle to the rectangular structure and discharge the mixed recycled asphalt mixture from the outlet around the edge of the rectangular structure. Then, a rake is used to spread the recycled asphalt mixture from the edge to the center, and finally, a roller is used to flatten the recycled asphalt mixture.

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