A mobile old asphalt pavement cold regeneration construction intelligent integrated device

Abstract

This invention discloses a mobile intelligent integrated device for cold recycling of old asphalt pavement, belonging to the field of pavement construction technology. It includes a tracked chassis and a vehicle body, with the vehicle body fixedly connected to the upper end of the tracked chassis. A mounting frame is installed at the lower end of the vehicle body, housing a crushing component. A screening component is mounted on the vehicle body. The invention utilizes a crushing component with double rollers and spirally arranged, oppositely rotating round-shank cutters to efficiently mill and crush the old pavement during the device's movement, gathering the material from both sides towards the center, achieving seamless integration of crushing and discharge. The screening component removes oversized particles and impurities before continuously conveying the material to the paver's mixing hopper, preventing damage to subsequent equipment and ensuring gradation quality. The mixing component uses a mixing shaft and mixing blades for forced mixing while simultaneously spraying binder through a conveying pipe and spray nozzle, achieving integrated operation of conveying, spraying, and mixing, simplifying the construction process and improving mixing uniformity.

Description

Technical Field

[0001] This invention relates to the field of road construction technology, and more specifically, to a mobile intelligent integrated device for cold recycling of old asphalt pavement. Background Technology

[0002] Cold recycling equipment for old asphalt pavement refers to specialized engineering machinery that recycles, processes, and reuses old asphalt pavement materials without heating. This type of equipment mills or crushes the old pavement, recycles the waste asphalt mixture, adds emulsified asphalt, foamed asphalt, and other binders, as well as water, cement, and other additives, and remixes it at room temperature to form a recycled mixture, which is then used for the paving of the base and surface layers.

[0003] Existing cold recycling equipment for old asphalt pavements often uses a single set of blades for its crushing mechanism, resulting in low crushing efficiency and uneven particle size distribution of the old material. After crushing, the material lacks an effective collection and guidance structure, easily accumulating and scattering inside the equipment. Furthermore, the equipment generally lacks a dedicated screening device for the crushed old material, allowing substandard materials containing oversized particles, metal debris, and weak particles to directly enter the mixing process. This damages the mixing blades and liners, shortens equipment lifespan, and causes the gradation of the recycled mixture to deviate significantly from design requirements, leading to decreased pavement strength, density, and durability, and early-stage defects. Simultaneously, segregation easily occurs during mixture transfer, making it difficult for the binder to fully and evenly mix with the old material, affecting the uniformity of the mixture and the quality of pavement formation. Moreover, existing equipment often uses welding to fix the longitudinal slope sensors, which is cumbersome to install and disassemble. Under continuous high-frequency vibration, the bolts are prone to loosening, causing sensor position deviation. This data deviation leads to inaccurate control of paving thickness and slope, making it difficult to meet design requirements for pavement smoothness.

[0004] Therefore, we have made improvements and proposed a mobile intelligent integrated device for cold recycling of old asphalt pavement. Summary of the Invention

[0005] To address the aforementioned problems in the existing technology, the purpose of this invention is to provide a mobile intelligent integrated device for cold recycling of old asphalt pavement.

[0006] To solve the above problems, the technical solution adopted by the present invention is as follows: A mobile intelligent integrated device for cold recycling of old asphalt pavement includes a tracked chassis and a vehicle body. The vehicle body is fixedly connected to the upper end of the tracked chassis. A mounting frame is installed at the lower end of the vehicle body. A crushing component is installed in the mounting frame. A screening component is installed on the vehicle body. A belt conveyor component is installed on one side of the vehicle body. The inlet end of the belt conveyor component is located below the outlet end of the screening component. An asphalt paver is installed at the outlet end of the belt conveyor component. A mixing hopper is installed on one side of the upper end of the asphalt paver. The outlet end of the belt conveyor component is located above the mixing hopper. A mixing component is installed in the mixing hopper. A paving component is installed on the side of the asphalt paver away from the mixing hopper. Mounting plates are fixedly connected to both sides of the asphalt paver. Fixing components are installed in both mounting plates. Longitudinal slope sensors are fixedly installed on both fixing components.

[0007] Preferably, the crushing assembly includes a rotating shaft rotatably connected to the inner wall of the mounting frame. Two symmetrically arranged rollers are fixedly sleeved on the outside of the rotating shaft. Multiple round shank cutters are fixedly connected to the outside of each of the two rollers. The multiple round shank cutters are arranged in a spiral shape. The spiral directions of the round shank cutters on the two rollers are opposite. The feed end of the screening assembly is located between the two rollers.

[0008] Preferably, a diesel engine is fixedly connected to the inner wall of the mounting bracket, a main pulley is fixedly connected to the output end of the diesel engine, a driven pulley is fixedly sleeved on the outside of the rotating shaft, a transmission belt is sleeved on the outside of the main pulley and the driven pulley, and multiple tensioning pulleys are rotatably connected to the inner wall of the mounting bracket, with the transmission belt sleeved on the outside of the multiple tensioning pulleys.

[0009] Preferably, the mixing assembly includes two stirring shafts rotatably connected to the inner wall of the mixing hopper, and multiple stirring blades are fixedly connected to the outside of each of the two stirring shafts. A geared motor is fixedly installed on one side of the mixing hopper, and the output end of the geared motor rotatably passes through the mixing hopper and is fixedly connected to one end of one of the stirring shafts. A chain drive assembly is provided on the outside of the output end of the geared motor and one end of the other stirring shaft.

[0010] Preferably, two conveying pipes are fixedly connected to the inner wall of one side of the mixing hopper, and multiple spray nozzles are connected to the side walls of the two conveying pipes. The multiple spray nozzles are located on the inner wall of the mixing hopper, and the two conveying pipes pass through the mixing hopper and extend to the outside of the mixing hopper.

[0011] Preferably, the fixing component includes a slot formed on one side of the mounting plate, a plug is inserted into the slot, the longitudinal slope sensor is fixedly connected to the end of the plug away from the mounting plate, and a limit component is installed in the mounting plate.

[0012] Preferably, the limiting component includes a U-shaped cavity formed in the inner wall of the mounting plate, and slots are formed on both sides of the insert block. A bidirectional screw is rotatably connected to the inner wall of the U-shaped cavity. Two symmetrically arranged movable plates are slidably connected to the inner wall of the U-shaped cavity. Both movable plates are threaded onto the outside of the bidirectional screw. A locking block is fixedly connected to the side wall of each of the two movable plates. Both locking blocks slide through the inner wall of the U-shaped cavity, and each locking block engages with one of the two slots.

[0013] Preferably, a worm gear is fixedly sleeved at the middle of the outer side of the bidirectional screw, a worm is rotatably connected to the inner wall of the U-shaped cavity, the worm gear and the worm mesh with each other, and a knob is rotatably connected to the lower end face of the mounting plate. The output end of the knob rotates through the mounting plate and is fixedly connected to one end of the worm.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The crushing component of this invention uses double rotating drums, along with round shank cutters arranged in a spiral pattern and rotating in opposite directions, to efficiently mill and crush old asphalt pavement during the equipment's movement. The cutters on the two drums gather and cut the material from both sides towards the middle, which not only increases the crushing area and efficiency but also allows the crushed old material to converge towards the center and fall precisely onto the feed end of the screening component located between the two drums. This achieves seamless connection between crushing and discharge, avoids material accumulation and secondary transfer, ensures the uniformity of old material crushing and the continuity of discharge, and provides relatively uniform raw materials for subsequent screening and mixing processes.

[0015] 2. The screening component of this invention is installed on the vehicle body, with its discharge end located above the feed end of the belt conveyor component. The crushed recycled material is first graded and screened by the screening component to remove oversized particles and impurities, and then falls onto the belt conveyor component. The vertical layout of the screening and belt conveyor is compact and the material flow direction is clear. The qualified recycled material after screening is continuously and stably conveyed to the mixing hopper of the paver by the belt conveyor component, realizing the assembly line operation of screening first and then conveying. This ensures that the particle size of the recycled material entering the mixing hopper meets the requirements and avoids damage to the subsequent mixing components and paving equipment caused by oversized materials, significantly improving the working reliability of the whole machine and the gradation quality of the recycled mixture.

[0016] 3. The mixing component of this invention is integrated into the mixing hopper of the asphalt paver. The two mixing shafts and mixing blades are driven to rotate by a geared motor, which forcibly mixes the recycled material falling into the mixing hopper. At the same time, the conveying pipe and multiple spray nozzles set on the inner wall of the mixing hopper can simultaneously spray emulsified asphalt and binder onto the recycled material during the mixing process, so that the recycled material and binder are fully and uniformly mixed in the mixing hopper. This realizes the integrated operation of conveying, spraying and mixing at the same time, which simplifies the construction process, improves the construction efficiency, and ensures that the recycled mixture is in a uniform and stable state before paving, which is conducive to improving the final road surface quality.

[0017] 4. In this solution, the longitudinal slope sensor is connected to the slot on the mounting plate via a plug, and is quickly and reliably fixed by a limiting component. This quick-release fixing structure allows for the installation and removal of the longitudinal slope sensor without the need for complex tools, facilitating on-site replacement and maintenance according to actual needs. Furthermore, the self-locking characteristics of the worm gear and knob ensure that the longitudinal slope sensor will not loosen or shift due to vibration during paving operations, guaranteeing that the longitudinal slope sensor is always in a precise working position. This enables accurate detection and control of paving thickness and longitudinal slope, effectively improving the smoothness and construction quality of the road surface. Attached Figure Description

[0018] Figure 1 A schematic diagram of the main structure of a mobile intelligent integrated device for cold recycling of old asphalt pavement provided in this application; Figure 2 A schematic diagram of the tracked chassis and body structure of a mobile intelligent integrated device for cold recycling of old asphalt pavement provided in this application; Figure 3 A schematic diagram of the mounting frame structure of a mobile intelligent integrated device for cold recycling of old asphalt pavement provided in this application; Figure 4 A schematic diagram of the crushing component structure of a mobile intelligent integrated device for cold recycling of old asphalt pavement provided in this application; Figure 5 A schematic diagram of the asphalt paver and conveying pipe structure of a mobile intelligent integrated device for cold recycling of old asphalt pavement provided in this application; Figure 6 A schematic diagram of the geared motor and chain drive assembly of a mobile intelligent integrated device for cold recycling of old asphalt pavement provided in this application; Figure 7 A schematic diagram of the slot and insert structure of a mobile intelligent integrated device for cold recycling of old asphalt pavement provided in this application; Figure 8 A schematic diagram of the worm gear and worm shaft structure of a mobile intelligent integrated device for cold recycling of old asphalt pavement provided in this application.

[0019] In the diagram: 1. Tracked chassis; 2. Vehicle body; 3. Mounting frame; 4. Crushing assembly; 401. Rotating shaft; 402. Drum; 403. Round shank cutter; 404. Diesel engine; 405. Main pulley; 406. Driven pulley; 407. Drive belt; 408. Tensioner; 5. Screening assembly; 6. Belt conveyor assembly; 7. Asphalt paver; 8. Mixing hopper; 9. Mixing assembly; 901. Mixing shaft; 902. Mixing blade; 9 03. Gear motor; 904. Chain drive assembly; 905. Conveying pipe; 906. Spray nozzle; 10. Leveling assembly; 11. Mounting plate; 12. Fixing assembly; 1201. Slot; 1202. Insert block; 1203. U-shaped cavity; 1204. Slot; 1205. Bidirectional screw; 1206. Moving plate; 1207. Locking block; 1208. Worm gear; 1209. Worm; 1210. Knob; 13. Longitudinal slope sensor. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0021] Please see Figures 1-8 As shown, the present invention provides a technical solution: a mobile intelligent integrated device for cold recycling of old asphalt pavement, including a tracked chassis 1 and a vehicle body 2. The vehicle body 2 is fixedly connected to the upper end of the tracked chassis 1. A mounting frame 3 is installed at the lower end of the vehicle body 2. A crushing component 4 is installed inside the mounting frame 3. A screening component 5 is installed on the vehicle body 2. A belt conveyor component 6 is installed on one side of the vehicle body 2. The inlet end of the belt conveyor component 6 is located below the outlet end of the screening component 5. An asphalt paver 7 is installed at the outlet end of the belt conveyor component 6. A mixing hopper 8 is installed on one side of the upper end of the asphalt paver 7. The outlet end of the belt conveyor component 6 is located above the mixing hopper 8. A mixing component 9 is installed inside the mixing hopper 8. A paving component 10 is installed on the side of the asphalt paver 7 away from the mixing hopper 8. Mounting plates 11 are fixedly connected to both sides of the asphalt paver 7. Fixing components 12 are installed inside both mounting plates 11. Longitudinal slope sensors 13 are fixedly installed on both fixing components 12.

[0022] Furthermore, the tracked chassis 1 serves as a walking support platform, supporting the vehicle body 2 and driving the entire machine on the old asphalt road surface, providing stable movement and operational support for the equipment. It also possesses good road adaptability and passability. The vehicle body 2 is fixedly connected to the upper end of the tracked chassis 1, integrating and installing the crushing component 4, screening component 5, and core working parts, providing a rigid mounting foundation and working platform for each component. The mounting frame 3 is installed at the lower end of the vehicle body 2, providing installation space and support structure for the crushing component 4, ensuring that the crushing component 4 can stably maintain close proximity to the ground for milling operations. The crushing component 4 is installed within the mounting frame 3, used for milling and crushing the old asphalt road surface, breaking the old road material into smaller fragments for subsequent screening. The crushing process provides a raw material base for recycling and simultaneously achieves the initial demolition and material recycling of the old road surface through crushing. Screening component 5, installed on the vehicle body 2, is used to grade and screen the crushed old material, separating qualified particles from oversized particles and impurities. This ensures that the particle size of the old material entering subsequent processes meets requirements, preventing oversized materials from damaging subsequent equipment and guaranteeing the gradation quality of the recycled mixture. A belt conveyor is installed at the feed end of screening component 5, located in the middle of crushing component 4, to transport the crushed material to the screening component 5 for screening. A belt conveyor component 6 is installed on one side of the vehicle body 2, with its feed end located below the discharge end of screening component 5. This continuously and stably transports the screened qualified old material from one side of the vehicle body 2 to the asphalt pavement. In the mixing hopper 8 of the asphalt paver 7, material is transferred and lifted across equipment, ensuring continuous material supply and conveying efficiency. The asphalt paver 7 is located at the discharge end of the belt conveyor assembly 6 to receive the recycled mixture from the belt conveyor assembly 6 and complete the road paving operation, spreading the mixture evenly on the road surface to be constructed. The mixing hopper 8 is located on one side of the upper end of the asphalt paver 7 and below the discharge end of the belt conveyor assembly 6. It is used to temporarily contain and store the old material conveyed by the belt conveyor assembly 6, providing mixing space for the mixing assembly 9. The mixing assembly 9 is installed inside the mixing hopper 8 and is used to forcibly mix the old material in the mixing hopper 8. During the mixing process, the old material is fully mixed with the sprayed emulsified asphalt and binder to form a uniform recycled mixture. The asphalt paver 7 is equipped with a leveling component 10, which is installed on the side of the asphalt paver 7 away from the mixing hopper 8. This component is used to level, shape, and initially vibrate and compact the recycled mixture after paving, ensuring the smoothness, cross slope, and initial density of the new pavement layer. The mounting plate 11 is fixedly connected to both sides of the asphalt paver 7, providing a mounting base and support for the fixing component 12 and the longitudinal slope sensor 13. The fixing component 12 is installed inside the mounting plate 11, allowing for quick and reliable fixation of the longitudinal slope sensor 13 to the mounting plate 11. This ensures that the longitudinal slope sensor 13 will not loosen or shift due to vibration during operation, and also facilitates the quick installation, disassembly, and maintenance of the longitudinal slope sensor 13. The longitudinal slope sensor 13 is fixedly installed on the fixing component 12.This system is used to monitor the paving thickness and longitudinal slope of the asphalt paver 7 in real time, and feeds the monitoring signals back to the control system. This enables precise detection and control of the paving thickness and longitudinal slope, thereby ensuring the smoothness and construction quality of the paved road.

[0023] In the preferred embodiment of this technical solution, please refer to Figures 2-4 As shown, the crushing assembly 4 includes a rotating shaft 401 rotatably connected to the inner wall of the mounting frame 3. Two symmetrically arranged rollers 402 are fixedly sleeved on the outside of the rotating shaft 401. Multiple round shank cutters 403 are fixedly connected to the outside of each roller 402. The multiple round shank cutters 403 are arranged in a spiral shape, and the spiral directions of the round shank cutters 403 on the two rollers 402 are opposite. The feed end of the screening assembly 5 is located between the two rollers 402. A diesel engine 404 is fixedly connected to the inner wall of the mounting frame 3. A main pulley 405 is fixedly connected to the output end of the diesel engine 404. A driven pulley 406 is fixedly sleeved on the outside of the rotating shaft 401. A transmission belt 407 is sleeved on the outside of the main pulley 405 and the driven pulley 406. Multiple tensioning pulleys 408 are rotatably connected to the inner wall of the mounting frame 3. The transmission belt 407 is sleeved on the outside of the multiple tensioning pulleys 408.

[0024] Furthermore, the rotating shaft 401 is rotatably connected to the inner wall of the mounting frame 3, used to drive the two drums 402 to rotate synchronously, providing rotational power and transmission support for the crushing operation, and transmitting the power output from the diesel engine 404 to the drums 402. The two drums 402 are symmetrically fixedly sleeved on the outside of the rotating shaft 401, used to carry the round shank cutters 403 and rotate synchronously under the drive of the rotating shaft 401. Through rotational motion, the old asphalt pavement is milled and crushed. The round shank cutters 403 are fixedly connected to the outside of the drums 402, and multiple round shank cutters 403 are arranged in a spiral shape. The spiral directions of the round shank cutters 403 on the two drums 402 are opposite, used to directly cut and crush the old asphalt pavement during the rotation of the drums 402, and at the same time, the crushed old material is gathered from both sides to the middle, ensuring that the crushed old material falls accurately into the feed end of the screening component 5 located between the two drums 402. The diesel engine 404 is fixedly connected to the inner wall of the mounting frame 3, serving as a power source to provide driving force for the entire crushing component 4, outputting stable mechanical energy to drive rotation. Shaft 401 rotates, and main pulley 405 is fixedly connected to the output end of diesel engine 404. It transmits the rotational power output by diesel engine 404 to driven pulley 406 via transmission belt 407, achieving long-distance power transmission and speed matching. Transmission belt 407 is sleeved on the outside of both main pulley 405 and driven pulley 406, transmitting the rotational power of main pulley 405 to driven pulley 406, thus realizing power transmission from diesel engine 404 to rotating shaft 401. Driven pulley 406 is fixedly sleeved... Located outside the rotating shaft 401, it receives power from the main pulley 405 and drives the rotating shaft 401 to rotate, transmitting power to the drum 402 to complete the crushing operation. The tensioning wheel 408 is rotatably connected to the inner wall of the mounting frame 3, and the transmission belt 407 is sleeved on the outside of the multiple tensioning wheels 408 to tension the transmission belt 407 to maintain the friction between the transmission belt 407 and the main pulley 405 and the driven pulley 406, preventing the transmission belt 407 from slipping and loosening during power transmission, and ensuring the stability and reliability of power transmission.

[0025] In the preferred embodiment of this technical solution, please refer to Figure 5 and Figure 6As shown, the mixing component 9 includes two stirring shafts 901 rotatably connected to the inner wall of the mixing hopper 8. Multiple stirring blades 902 are fixedly connected to the outside of each of the two stirring shafts 901. A geared motor 903 is fixedly installed on one side of the mixing hopper 8. The output end of the geared motor 903 rotatably passes through the mixing hopper 8 and is fixedly connected to one end of one of the stirring shafts 901. A chain drive assembly 904 is provided on the outside of the output end of the geared motor 903 and one end of the other stirring shaft 901. Two conveying pipes 905 are fixedly connected to the inner wall of one side of the mixing hopper 8. Multiple spray nozzles 906 are connected to the side walls of the two conveying pipes 905. The multiple spray nozzles 906 are all located on the inner wall of the mixing hopper 8. Both conveying pipes 905 pass through the mixing hopper 8 and extend to the outside of the mixing hopper 8.

[0026] Furthermore, two mixing shafts 901 are rotatably connected to the inner wall of the mixing hopper 8, supporting the mixing blades 902 and driving them to rotate within the hopper 8. This provides mixing power and rotational support for the mixing of recycled materials and binders. Multiple mixing blades 902 are fixedly connected to the outside of the mixing shafts 901, forcibly mixing and turning the recycled materials within the mixing hopper 8 under the drive of the mixing shafts 901. This ensures that the recycled materials fully contact and uniformly mix with the sprayed emulsified asphalt and binders, guaranteeing the uniformity and stability of the recycled mixture. A geared motor 903 is fixedly installed on one side of the mixing hopper 8, outputting low-speed, high-torque rotational power to the mixing shafts 901, providing a stable and strong driving force for the mixing operation. This ensures that the mixing shafts 901 can rotate continuously and smoothly under heavy load conditions. A chain drive assembly 904 is located outside the output end of the geared motor 903 and another mixing shaft assembly. One end of shaft 901 is used to transmit the output power of geared motor 903 to both mixing shafts 901 simultaneously, ensuring that the two mixing shafts 901 rotate synchronously and realize dual-shaft linkage mixing to improve mixing efficiency and uniformity. Two conveying pipes 905 are fixedly connected to the inner wall of one side of mixing hopper 8. Both conveying pipes 905 penetrate the mixing hopper 8 and extend to the outside of the mixing hopper 8. They are used to convey emulsified asphalt and other binders from the outside of the mixing hopper 8 to the inside of the mixing hopper 8, providing a continuous binder supply channel for spray head 906. Multiple spray heads 906 are connected to the side wall of conveying pipe 905 and are located on the inner wall of mixing hopper 8. They are used to evenly spray the emulsified asphalt and binder conveyed by conveying pipe 905 into the old material in mixing hopper 8, ensuring that the binder can be evenly distributed in the old material during the mixing process, improving mixing efficiency and the quality of recycled mixture.

[0027] In the preferred embodiment of this technical solution, please refer to Figure 7 and Figure 8As shown, the fixing component 12 includes a slot 1201 opened on one side of the mounting plate 11, a plug 1202 is inserted into the slot 1201, the longitudinal slope sensor 13 is fixedly connected to the end of the plug 1202 away from the mounting plate 11, and a limit component is installed in the mounting plate 11. The limiting component includes a U-shaped cavity 1203 formed in the inner wall of the mounting plate 11. The two side walls of the insert block 1202 are provided with slots 1204. The inner wall of the U-shaped cavity 1203 is rotatably connected to a bidirectional screw 1205. The inner wall of the U-shaped cavity 1203 is slidably connected to two symmetrically arranged movable plates 1206. The two movable plates 1206 are threaded onto the outside of the bidirectional screw 1205. The side walls of the two movable plates 1206 are fixedly connected to a locking block 1207. The two locking blocks 1207 slide through the inner wall of the U-shaped cavity 1203, and the two locking blocks 1207 respectively engage with the two slots 1204. A worm gear 1208 is fixedly sleeved at the middle of the outer side of the bidirectional screw 1205. A worm 1209 is rotatably connected to the inner wall of the U-shaped cavity 1203. The worm gear 1208 and the worm 1209 mesh with each other. A knob 1210 is rotatably connected to the lower end face of the mounting plate 11. The output end of the knob 1210 rotates through the mounting plate 11 and is fixedly connected to one end of the worm 1209.

[0028] Furthermore, a slot 1201 is formed on one side of the mounting plate 11 to accommodate the insert block 1202 and to guide and position the insertion of the insert block 1202, ensuring that the installation position of the longitudinal slope sensor 13 is accurate and stable. The insert block 1202 is inserted into the slot 1201 and the longitudinal slope sensor 13 is fixedly connected to the end of the insert block 1202 away from the mounting plate 11, for detachably connecting the longitudinal slope sensor 13 to the mounting plate 11, realizing the rapid assembly and separation of the longitudinal slope sensor 13 from the asphalt paver 7. A U-shaped cavity 1203 is formed on the inner wall of the mounting plate 11 to accommodate the moving parts of the limiting assembly and to provide them with movement space, ensuring that the moving plate 1206 and the locking block 1207 can be in the U-shaped cavity. The U-shaped cavity 1202 slides freely within the U-shaped cavity 1203 to achieve locking and unlocking actions. Slots 1204 are formed on both sides of the insert block 1202 to engage with the insert block 1207 to lock the insert block 1202 and prevent it from dislodging from the slot 1201. A bidirectional screw 1205 is rotatably connected to the inner wall of the U-shaped cavity 1203, driving two movable plates 1206 to move in opposite directions along the axial direction of the bidirectional screw 1205 during rotation, converting rotational motion into linear motion of the movable plates 1206. Two movable plates 1206 are slidably connected to the inner wall of the U-shaped cavity 1203, and both are threaded onto the outside of the bidirectional screw 1205 for operation under the drive of the bidirectional screw 1205. The moving plate 1206 drives the locking block 1207 to move, providing it with the power and support for movement. The locking block 1207 is fixedly connected to the side wall of the moving plate 1206 and slides through the inner wall of the U-shaped cavity 1203. It is used to extend and retract the U-shaped cavity 1203 under the drive of the moving plate 1206. When extended, it engages with the slot 1204 to lock the insert 1202. When retracted, it disengages from the slot 1204 to unlock the insert 1202, achieving quick disassembly. The worm gear 1208 is fixedly sleeved on the outside of the double-acting screw 1205 and meshes with the worm 1209. It is used to transmit the rotational power of the worm 1209 to the double-acting screw 1205. At the same time, the worm gear 1208 and the worm 1209 utilize their self-rotation mechanism. The locking feature prevents the bidirectional screw 1205 from accidentally reversing due to vibration during operation. The worm gear 1209 is rotatably connected to the inner wall of the U-shaped cavity 1203 and meshes with the worm wheel 1208. It is used to transmit the rotational motion of the knob 1210 to the worm wheel 1208 and drive the bidirectional screw 1205 to rotate, thereby realizing the conversion of the power transmission direction. The knob 1210 is rotatably connected to the lower end face of the mounting plate 11, and its output end rotates through the mounting plate 11 and is fixedly connected to one end of the worm gear 1209. It is used for the operator to manually rotate to drive the worm gear 1209 to rotate. It provides a convenient external control interface for locking and unlocking operations, and the longitudinal slope sensor 13 can be quickly installed and removed without the need for complicated tools.

[0029] Working principle: The device is supported by a tracked chassis 1 and the vehicle body 2 moves forward. The crushing component 4 in the mounting frame 3 starts to work. The diesel engine 404 outputs power and drives the rotating shaft 401 to rotate through the main pulley 405, the transmission belt 407 and the secondary pulley 406. The rotating shaft 401 drives two symmetrically arranged rollers 402 to rotate. The round shank cutters 403 on the outside of the two rollers 402 are arranged in a spiral shape and rotate in opposite directions. During the rotation, the old asphalt pavement is milled and crushed, and the crushed old material is gathered from both sides to the middle. The crushed waste material falls into the feed end of the screening component 5 located between the two rollers 402. The crushed waste material then enters the screening component 5 and is screened by the grading screen. Waste material with qualified particle size passes through the screen and is discharged from the discharge end of the screening component 5. Oversized particles and impurities are intercepted by the screen and separated from the discharge outlet of the screening component 5 to prevent them from entering subsequent processes and damaging the equipment. The discharge end of the screening component 5 is located above the feed end of the belt conveyor component 6. Qualified waste material falls directly onto the belt conveyor component 6 by gravity. The belt conveyor assembly 6 continuously and stably conveys the qualified old material after screening upwards from one side of the vehicle body 2 until its discharge end. The discharge end of the belt conveyor assembly 6 is located above the mixing hopper 8 at the top of the asphalt paver 7. The old material falls into the mixing hopper 8 under the action of gravity, ready for mixing. After the old material enters the mixing hopper 8, the mixing assembly 9 starts to work. The geared motor 903 starts and drives the two mixing shafts 901 to rotate synchronously through the chain drive assembly 904. The mixing blades 902 outside the two mixing shafts 901 forcefully mix the old material in the mixing hopper 8. During the mixing process, emulsified asphalt and other binders are transported into the mixing hopper 8 through two conveying pipes 905 and evenly sprayed into the old material by multiple spray nozzles 906 connected to the side wall of the conveying pipes 905. The old material and binder are fully mixed under the forced mixing of the mixing blades 902 to form a uniform recycled mixture. The uniformly mixed recycled mixture is discharged from the mixing hopper 8 and paved and initially compacted by the paving assembly 10 on the rear side of the asphalt paver 7 to form a new road surface layer. During the paving process, the fixing assembly 12 and the longitudinal slope sensor 13 installed on the mounting plate 11 work together. The mechanical longitudinal slope sensor 13 is fixedly connected to the insert 1202, which is inserted into the slot 1201 on one side of the mounting plate 11. Rotating the knob 1210 drives the worm gear 1209 to rotate, which in turn drives the worm wheel 1208 to rotate. The bidirectional screw 1205 is driven to rotate, which in turn drives the two moving plates 1206 to move towards each other. This causes the locking blocks 1207 on the two moving plates 1206 to be inserted into the locking slots 1204 on both sides of the insert block 1202, thereby quickly locking the longitudinal slope sensor 13 in a precise position. The longitudinal slope sensor 13 detects the paving thickness and longitudinal slope in real time and feeds the detection signal back to the control system. The control system adjusts the leveling device of the asphalt paver 7 according to the feedback signal, thereby achieving precise closed-loop control of the paving thickness and slope to ensure the smoothness of the road surface.

[0030] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0031] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.

Claims

1. A mobile intelligent integrated device for cold recycling of old asphalt pavement, comprising a tracked chassis (1) and a vehicle body (2), characterized in that, The vehicle body (2) is fixedly connected to the upper end of the tracked chassis (1). A mounting frame (3) is installed at the lower end of the vehicle body (2). A crushing component (4) is installed inside the mounting frame (3). A screening component (5) is installed on the vehicle body (2). A belt conveyor component (6) is installed on one side of the vehicle body (2). The inlet end of the belt conveyor component (6) is located below the outlet end of the screening component (5). An asphalt paver (7) is installed at the outlet end of the belt conveyor component (6). The asphalt paver (7) is mounted on the asphalt paver (7). A mixing hopper (8) is provided on one side of the asphalt paver (7). The discharge end of the belt conveyor assembly (6) is located above the mixing hopper (8). A mixing assembly (9) is installed inside the mixing hopper (8). A paving assembly (10) is installed on the side of the asphalt paver (7) away from the mixing hopper (8). Mounting plates (11) are fixedly connected to both sides of the asphalt paver (7). Fixing assemblies (12) are installed inside both mounting plates (11). A longitudinal slope sensor (13) is fixedly installed on both fixing assemblies (12).

2. The mobile intelligent integrated device for cold recycling of old asphalt pavement according to claim 1, characterized in that, The crushing component (4) includes a rotating shaft (401) rotatably connected to the inner wall of the mounting frame (3). Two symmetrically arranged rollers (402) are fixedly sleeved on the outside of the rotating shaft (401). Multiple round shank cutters (403) are fixedly connected to the outside of the two rollers (402). The multiple round shank cutters (403) are arranged in a spiral shape. The spirals of the round shank cutters (403) on the two rollers (402) are opposite. The feed end of the screening component (5) is located between the two rollers (402).

3. The mobile intelligent integrated device for cold recycling of old asphalt pavement according to claim 2, characterized in that, A diesel engine (404) is fixedly connected to the inner wall of the mounting bracket (3). A main pulley (405) is fixedly connected to the output end of the diesel engine (404). A secondary pulley (406) is fixedly sleeved on the outside of the rotating shaft (401). A transmission belt (407) is sleeved on the outside of the main pulley (405) and the secondary pulley (406). A plurality of tensioning pulleys (408) are rotatably connected to the inner wall of the mounting bracket (3). The transmission belt (407) is sleeved on the outside of the plurality of tensioning pulleys (408).

4. The mobile intelligent integrated device for cold recycling of old asphalt pavement according to claim 1, characterized in that, The mixing component (9) includes two stirring shafts (901) rotatably connected to the inner wall of the mixing hopper (8). Multiple stirring blades (902) are fixedly connected to the outside of the two stirring shafts (901). A geared motor (903) is fixedly installed on one side of the mixing hopper (8). The output end of the geared motor (903) rotatably passes through the mixing hopper (8) and is fixedly connected to one end of one of the stirring shafts (901). A chain drive component (904) is provided on the outside of the output end of the geared motor (903) and one end of the other stirring shaft (901).

5. The mobile intelligent integrated device for cold recycling of old asphalt pavement according to claim 1, characterized in that, Two conveying pipes (905) are fixedly connected to the inner wall of one side of the mixing hopper (8). The side walls of the two conveying pipes (905) are connected to multiple spray nozzles (906). The multiple spray nozzles (906) are located on the inner wall of the mixing hopper (8). The two conveying pipes (905) penetrate the mixing hopper (8) and extend to the outside of the mixing hopper (8).

6. The mobile intelligent integrated device for cold recycling of old asphalt pavement according to claim 5, characterized in that, The fixing component (12) includes a slot (1201) opened on one side of the mounting plate (11), a plug (1202) is inserted into the slot (1201), the longitudinal slope sensor (13) is fixedly connected to the end of the plug (1202) away from the mounting plate (11), and a limit component is installed in the mounting plate (11).

7. The mobile intelligent integrated device for cold recycling of old asphalt pavement according to claim 6, characterized in that, The limiting component includes a U-shaped cavity (1203) formed on the inner wall of the mounting plate (11). The two side walls of the insert block (1202) are provided with slots (1204). The inner wall of the U-shaped cavity (1203) is rotatably connected to a bidirectional screw (1205). The inner wall of the U-shaped cavity (1203) is slidably connected to two symmetrically arranged movable plates (1206). The two movable plates (1206) are threaded onto the outside of the bidirectional screw (1205). The side walls of the two movable plates (1206) are fixedly connected to a locking block (1207). The two locking blocks (1207) slide through the inner wall of the U-shaped cavity (1203) and engage with the two slots (1204) respectively.

8. The mobile intelligent integrated device for cold recycling of old asphalt pavement according to claim 7, characterized in that, A worm gear (1208) is fixedly sleeved at the middle of the outside of the bidirectional screw (1205). A worm (1209) is rotatably connected to the inner wall of the U-shaped cavity (1203). The worm gear (1208) and the worm (1209) mesh with each other. A knob (1210) is rotatably connected to the lower end face of the mounting plate (11). The output end of the knob (1210) rotates through the mounting plate (11) and is fixedly connected to one end of the worm (1209).

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