Cold-mixed asphalt mixture self-leveling intelligent paving system

Abstract

This application discloses a self-leveling intelligent paving system for cold-mix asphalt mixtures, comprising: a paving box, the paving box including a first side plate assembly and a second side plate assembly arranged opposite to each other; a material placing auger mechanism disposed between the first side plate assembly and the second side plate assembly; a double roller mechanism, the double roller mechanism being vertically movably installed between the first side plate assembly and the second side plate assembly; and the double roller mechanism being located behind the material placing auger mechanism along the travel direction; and an automatic leveling system, the automatic leveling system being disposed on the paving box and linked with the double roller mechanism, used to dynamically adjust the paving thickness. This solution integrates paving, pre-compaction, and automatic leveling operations, which can improve the initial compaction and smoothness of the cold-mix asphalt mixture after paving, accelerate the demulsification speed of the cold-mix asphalt mixture, and shorten the construction cycle.

Description

Technical Field

[0001] This application relates to the field of road maintenance and construction equipment technology, and in particular to a self-leveling intelligent paving system for cold-mix asphalt mixtures. Background Technology

[0002] In preventative maintenance of highways and urban roads, microsurfacing technology is widely used due to its excellent anti-skid properties, waterproofing effect, and construction efficiency. Currently, the core paving equipment for microsurfacing construction is the "rectangular" paving box (traditional box-type paving box). This type of equipment typically consists of a box body, a spreading auger, a scraper, and a hydraulic lifting mechanism. Its working principle is as follows: the mixed emulsified asphalt mixture is fed into the box body, and the mixture is evenly distributed laterally by the built-in spreading auger. Then, the rubber or steel scraper at the rear is used to level the mixture, forming a paving layer of a certain thickness.

[0003] However, traditional rectangular pavers have the following technical defects: lack of pre-compaction function, the mixture is in a "loose" state, and the early strength formation is slow; the scraper directly contacts the road surface for leveling, which can easily cause longitudinal scratches due to oversized stones or agglomeration of the mixture; the equipment is light in weight and cannot provide initial compaction for cold-mixed and cold-laid mixtures (especially modified emulsified asphalt mixtures with a thickness of 10mm-25mm); when using slippers for leveling, uneven paving thickness is easily caused by bumps or depressions in the original road surface. Summary of the Invention

[0004] The embodiments of this application provide a self-leveling intelligent paving system for cold-mix asphalt mixtures.

[0005] To achieve the above objectives, embodiments of this application provide a self-leveling intelligent paving system for cold-mix asphalt mixtures, comprising: The paving box includes a first side panel assembly and a second side panel assembly disposed opposite to each other. A fabric spiral mechanism is disposed between the first side plate assembly and the second side plate assembly; A double roller mechanism is movably mounted between the first side plate assembly and the second side plate assembly; and the double roller mechanism is located behind the fabric auger mechanism in the direction of travel. An automatic leveling system is installed on the paving box and linked to the double roller mechanism to dynamically adjust the paving thickness.

[0006] In one embodiment, the paving box further includes an arch adjustment mechanism, which is disposed in the middle of the paving box; The fabric spiral mechanism includes a first set of fabric spiral components and a second set of fabric spiral components; one side of the first set of fabric spiral components is connected to the first side plate assembly, and the other side of the first set of fabric spiral components is connected to the camber adjustment mechanism; one side of the second set of fabric spiral components is connected to the camber adjustment mechanism, and the other side of the second set of fabric spiral components is connected to the second side plate assembly.

[0007] In one embodiment, the dual-roller mechanism includes a first roller assembly and a second roller assembly; The first roller assembly includes a first roller, a third roller, and a first drive mechanism. One side of the first roller is connected to a first side plate assembly, and the other side of the first roller is connected to one side of the third roller with an adjustable arch. The other side of the third roller is connected to a second side plate assembly. The first drive mechanism is disposed on the first side plate assembly and is used to drive the first roller and the third roller. The second roller assembly includes a second roller, a fourth roller, and a second drive mechanism. One side of the second roller is connected to the first side plate assembly, and the other side of the second roller is connected to one side of the fourth roller with an adjustable arch. The other side of the fourth roller is connected to the second side plate assembly. The second roller and the fourth roller are arranged in parallel with the first roller and the third roller, respectively. The first roller and the third roller are located on the side closer to the fabric spiral mechanism. The second drive mechanism is located on the second side plate assembly and is used to drive the second roller and the fourth roller.

[0008] In one embodiment, the first side plate assembly includes a first spiral mounting plate, a first roller mounting plate, and a second roller mounting plate. The first roller mounting plate is slidably connected to both the first spiral mounting plate and the second roller mounting plate. One side of the first set of fabric spiral components is movably mounted on the first spiral mounting plate. One side of the first roller is movably mounted on the first roller mounting plate, and one side of the second roller is movably mounted on the second roller mounting plate. The second side plate assembly includes a second spiral mounting plate, a third roller mounting plate, and a fourth roller mounting plate. The third roller mounting plate can be slidably connected to the second spiral mounting plate and the fourth roller mounting plate. One side of the second set of fabric spiral components is movably mounted on the second spiral mounting plate. One side of the third roller is movably mounted on the third roller mounting plate, and one side of the fourth roller is movably mounted on the fourth roller mounting plate.

[0009] In one embodiment, the cold-mix asphalt self-leveling intelligent paving system also includes a hydraulic height adjustment mechanism, which is used to drive the dual roller mechanism to slide up and down.

[0010] In one embodiment, the paving box further includes a first rear frame and a second rear frame; one side of the first rear frame is connected to a first roller mounting plate and a second roller mounting plate, the other side of the first rear frame is connected to one side of the second rear frame with adjustable camber, and the other side of the second rear frame is connected to a third roller mounting plate and a fourth roller mounting plate. The dual-roller mechanism also includes a first manual height adjustment mechanism, which is mounted on the first rear frame and the second rear frame and connected to the first roller and the third roller to adjust the relative height between the first roller, the third roller and the second roller, and the fourth roller.

[0011] In one embodiment, the cold-mix asphalt self-leveling intelligent paving system further includes a third roller assembly; the third roller assembly is mounted on the first rear frame and / or the second rear frame; The third roller assembly includes a fifth roller and a third drive mechanism; the fifth roller is arranged parallel to the first roller; the fifth roller is used to fill the compaction gaps between the first roller and the third roller, and between the second roller and the fourth roller; The third drive mechanism is used to drive the fifth roller.

[0012] In one embodiment, the third roller assembly further includes a second manual height adjustment mechanism for adjusting the height of the fifth roller.

[0013] In one embodiment, the automatic leveling system includes an angle sensor, a slipper, and a probe. A sliding shoe is fixedly installed at the bottom of the first side panel assembly; The first side plate assembly includes a first bracket, the first bracket and the first roller remain in a fixed relative position, the first bracket is connected to an angle sensor, the angle sensor and the probe rod are connected through a first support rod, one end of the first support rod is fixedly connected to the rotating shaft of the angle sensor, and the other end is hinged to the probe rod; As the probe moves up and down, the angle sensor outputs different angle signals.

[0014] In one embodiment, the cold-mix asphalt mixture self-leveling intelligent paving system also includes a foot pedal located behind the paving box along the direction of travel.

[0015] This application has the following advantages over the prior art: The self-leveling intelligent paving system for cold-mix asphalt mixtures provided in this application uses a dual-roller mechanism to directly apply compaction to the cold-mix mixture behind the placing auger, achieving simultaneous paving and pre-compaction, and imparting initial density to the mixture. It promotes physical demulsification of emulsified asphalt (squeezing out water and promoting the fusion of asphalt particles), accelerates early strength formation, and reduces curing time before opening to traffic. It solves the early-stage problems such as rutting and loosening caused by the "loose paving" of traditional paving boxes, and is particularly suitable for the construction of ultra-thin cold-mix asphalt overlays with a thickness of 10mm to 25mm.

[0016] The self-leveling intelligent paving system for cold-mix asphalt mixtures provided in this application employs a mechanical automatic leveling system using angle sensors and slippers. It detects changes in the road surface reference in real time and dynamically adjusts the roller height via closed-loop servo control to drive hydraulic cylinders. The paving thickness accuracy can reach ±2mm, far superior to traditional slipper-type paving boxes, effectively compensating for the original road surface's longitudinal and transverse slopes and local unevenness.

[0017] The self-leveling intelligent paving system for cold-mix asphalt mixtures provided in this application replaces traditional scraper leveling with dual-roller compaction, completely avoiding longitudinal scratches caused by oversized aggregates or agglomeration of the mixture.

[0018] The self-leveling intelligent paving system for cold-mix asphalt mixtures provided in this application consists of front and rear rollers, each divided into left and right sections, hinged in the middle by an adjustable camber connector. Combined with an camber adjustment rod, the cross slope of the road surface can be flexibly set. The segmented structure shortens the length of a single roller, reducing processing difficulty and torsional deformation. The fifth roller effectively compensates for the compaction blind spots between the segmented rollers, ensuring uniform compaction across the entire width.

[0019] The self-leveling intelligent paving system for cold-mix asphalt mixture provided in this application allows for independent setting of the height difference between the front and rear rollers via a first manual height adjustment mechanism. This enables adjustment of the compaction sequence based on the characteristics of the mixture, preventing displacement or cracking.

[0020] The self-leveling intelligent paving system for cold-mix asphalt mixtures provided in this application integrates paving, pre-compaction, and automatic leveling operations, reducing the number of subsequent roller compaction passes and shortening the construction cycle. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a three-dimensional schematic diagram of the self-leveling intelligent paving system for cold-mix asphalt mixtures, as described in this application. Figure 1; Figure 2 This is a three-dimensional schematic diagram of the self-leveling intelligent paving system for cold-mix asphalt mixtures, as described in this application. Figure 2 ; Figure 3 This is a bottom view of the self-leveling intelligent paving system for cold-mix asphalt mixtures according to an embodiment of this application; Figure 4 This is a left view of the self-leveling intelligent paving system for cold-mix asphalt mixtures according to an embodiment of this application; Figure 5 This is a schematic diagram of the intermediate component in the self-leveling intelligent paving system for cold-mix asphalt mixtures according to an embodiment of this application. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection" and "joining" should be interpreted broadly, for example, they can refer to fixed connection, detachable connection, or integral connection; for those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0026] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0027] Reference Figures 1-4The embodiments of this application provide a self-leveling intelligent paving system for cold-mix asphalt mixture, including: a paving box 1, a material spreading auger mechanism 2, a double roller mechanism 3, and an automatic leveling system 4.

[0028] The paving box 1 includes a first side plate assembly 11 and a second side plate assembly 12 disposed opposite to each other. Fabric spiral mechanism 2 is disposed between the first side plate assembly 11 and the second side plate assembly 12; The double roller mechanism 3 is movably mounted between the first side plate assembly 11 and the second side plate assembly 12; and the double roller mechanism 3 is located behind the fabric spiral mechanism 2 along the travel direction. Automatic leveling system 4 is installed on the paving box 1 and linked with the double roller mechanism 3 to dynamically adjust the paving thickness.

[0029] Specifically, the paving box 1 (which can be simply referred to as the box) includes a first side plate assembly 11 and a second side plate assembly 12 arranged opposite each other on the left and right. Both the first side plate assembly 11 and the second side plate assembly 12 can be rigid components welded from steel plates. The front and rear ends of the box are respectively provided with a front frame and a rear frame, which are used to connect the two side plate assemblies (including the first side plate assembly 11 and the second side plate assembly 12) and maintain structural stability. A traction frame is provided on the front end of the box, i.e., the front frame, for connecting to the paver main unit.

[0030] The auger mechanism 2 is located between the first side plate assembly 11 and the second side plate assembly 12, in the front region of the paving body. The auger mechanism 2 includes two counter-rotating auger shafts, each welded with continuous blades. The two ends of the auger shafts are mounted to the left and right side plate assemblies via bearings and are driven to rotate by a hydraulic motor. It is understood that a speed reducer can also be connected, meaning the hydraulic motor synchronously drives the two auger shafts to rotate via the speed reducer. The output shaft of the speed reducer is connected to the mounting bearings of the two auger shafts via a chain. The auger mechanism 2 is used to evenly distribute the cold-mix asphalt mixture input from above the paving body laterally across the entire paving width.

[0031] The double roller mechanism 3 can be made of steel cylinder with a hardened surface or an added wear-resistant layer. The shaft ends of the double roller mechanism 3 are mounted to the left and right side plate assemblies via bearings. The double roller mechanism 3 is used to apply a rolling action to the mixture of material distributed by the fabric spiral mechanism 2, achieving pre-compaction.

[0032] The automatic leveling system 4 is used to drive the double roller mechanism 3 to move up and down when it detects a change in the height of the double roller mechanism 3 relative to the reference, so as to dynamically adjust the paving thickness.

[0033] In this embodiment, during operation, the paving host drives the entire system forward, and the cold-mixed asphalt mixture falls into the box from above. The spreading screw mechanism 2 spreads it laterally, and then the double roller mechanism 3 rolls and compacts the mixture. At the same time, the automatic leveling system 4 adjusts the height of the double rollers in real time according to the road surface reference to ensure uniform paving thickness.

[0034] This embodiment integrates the paving, pre-compaction, and automatic leveling of cold-mix asphalt mixtures, significantly improving construction quality and efficiency.

[0035] In one embodiment, the paving box 1 further includes an arch adjustment mechanism 13, which is disposed in the middle of the paving box 1; the fabric auger mechanism 2 includes a first set of fabric auger components 21 and a second set of fabric auger components 22; one side of the first set of fabric auger components 21 is connected to the first side plate assembly 11, and the other side of the first set of fabric auger components 21 is connected to the arch adjustment mechanism 13; one side of the second set of fabric auger components 22 is connected to the arch adjustment mechanism 13, and the other side of the second set of fabric auger components 22 is connected to the second side plate assembly 12.

[0036] Specifically, the camber adjustment mechanism 13 includes an intermediate component 131 and camber adjustment rods 132. The intermediate component 131 is arranged parallel to the first side plate assembly 11 and the second side plate assembly 12. The intermediate component 131 divides the interior of the paving box 1 into left and right parts, and the front frame and rear frame are also divided into a first front frame, a second front frame, a first rear frame 14, and a second rear frame 15. The front end of the intermediate component 131 is connected to the first front frame and the second front frame, respectively. Camber adjustment rods 132 are connected between the first front frame and the second front frame, and between the first rear frame 14 and the second rear frame 15, to adjust the camber of the entire system to form the required camber on the paving cross section.

[0037] Because camber adjustment is required, the fabric auger mechanism 2 is divided into a first set of fabric auger components 21 and a second set of fabric auger components 22, located between the first side plate assembly 11 and the middle assembly 131, and between the middle assembly 131 and the second side plate assembly 12, respectively. It is understood that the first set of fabric auger components 21 and the second set of fabric auger components 22 can each be independently driven by a set of hydraulic motors and reducers.

[0038] Understandably, intermediate component 131 can adopt the following... Figure 5The structure shown includes a central rod and a central plate. The central rod is connected to the upper end of the central plate, and one end of the central rod extends out of the central plate and connects to the first and second front frames. A pair of vertical grooves are formed along the upper edge of the central plate, and a slider is installed in each groove. The slider can move along the groove. A screw is installed on the central rod, with one end screwed onto the central rod and extending out of the central rod, and the other end extending into the groove and connecting to the slider. The other side of the first set of fabric spiral components 21 and one side of the second set of fabric spiral components 22 are slidably connected to the pair of sliders. The camber of the fabric spiral mechanism 2 can be adjusted through this intermediate component 131. This intermediate component 131 can be implemented using existing technology (such as patent application number 2025114639786), and the connection method between the intermediate component 131 and the front frame can also adopt existing technology. The specific structure of the front frame, the specific structure and implementation method of the fabric spiral mechanism 2 can also adopt existing technology, and will not be described in detail here.

[0039] In this embodiment, the camber adjustment mechanism allows for rapid adjustment of the lateral slope of the paving layer according to road design requirements, satisfying the cross-sectional shape requirements of different road sections. Furthermore, the camber adjustment mechanism serves as a longitudinal reinforcement structure for the paving box, providing overall rigidity and reducing deformation during operation.

[0040] In one embodiment, the dual-roller mechanism 3 includes a first roller assembly and a second roller assembly, which are arranged side by side along the travel direction; The first roller assembly includes a first roller 31, a third roller 32, and a first drive mechanism 35. One side of the first roller 31 is connected to the first side plate assembly 11, and the other side of the first roller 31 is connected to one side of the third roller 32 with adjustable camber. The other side of the third roller 32 is connected to the second side plate assembly 12. The first drive mechanism 35 is disposed on the first side plate assembly 11 and is used to drive the first roller 31 and the third roller 32. The second roller assembly includes a second roller 33, a fourth roller 34, and a second drive mechanism 36. One side of the second roller 33 is connected to the first side plate assembly 11, and the other side of the second roller 33 is connected to one side of the fourth roller 34 with adjustable arch. The other side of the fourth roller 34 is connected to the second side plate assembly 12. The second roller 33 and the fourth roller 34 are arranged in parallel with the first roller 31 and the third roller 32, respectively. The first roller 31 and the third roller 32 are arranged on the side closer to the fabric spiral mechanism 2. The second drive mechanism 36 is arranged on the second side plate assembly 12 and is used to drive the second roller 33 and the fourth roller 34.

[0041] Specifically, the first roller 31 and the third roller 32 can be connected with adjustable camber via an adjustable camber connector, which can be a universal joint or a universal shaft. This allows the first roller 31 and the third roller 32 to form a certain angle in the vertical plane, thereby adapting to changes in the camber of the paving cross section. The first roller 31 and the third roller 32 are both mounted on the first side plate assembly 11 and the second side plate assembly 12 respectively via bearings.

[0042] The first drive mechanism 35 is mounted on the first side plate assembly 11. This drive mechanism includes a hydraulic motor and may also include a reducer. The output shaft of the hydraulic motor is connected to the input shaft of the reducer, and the output shaft of the reducer is connected to the bearing of the first roller 31 via a chain, driving the first roller 31 to rotate. Simultaneously, since the first roller 31 and the third roller 32 are connected via an adjustable arch connector, the rotational torque of the first roller 31 can be transmitted to the third roller 32, thereby driving the third roller 32 to rotate synchronously. It is understood that a drive mechanism can also be provided for each of the first roller 31 and the third roller 32, respectively mounted on the first side plate assembly 11 and the second side plate assembly 12.

[0043] The second roller assembly is similar to the first roller assembly, and will not be described again.

[0044] The first roller 31 and the third roller 32 together constitute the front roller, which is located near the fabric spiral mechanism 2. The second roller 33 and the fourth roller 34 together constitute the rear roller, which is located behind the front roller and is parallel to and side by side with the front roller. The first drive mechanism 35 and the second drive mechanism 36 are respectively arranged on the left and right side plate assemblies, realizing a balanced distribution of driving force and avoiding the problem of uneven torque caused by unilateral drive of the long roller shaft.

[0045] When the camber adjustment mechanism 13 changes the lateral tilt angle of the left and right side plates, the adjustable camber connectors between the first roller 31 and the third roller 32, and between the second roller 33 and the fourth roller 34, will automatically adapt to the angle change, ensuring that the rollers can still fit tightly against the paving layer surface with a transverse slope, and achieve uniform compaction across the entire width.

[0046] In this embodiment, the rollers are segmented and connected with adjustable camber, allowing the paving system to flexibly adapt to construction needs ranging from flat roads to large cross slopes. The rollers maintain linear contact with the road surface at all times, ensuring uniform compaction. The front and rear rollers are driven independently from the left and right sides, avoiding the torsional deformation and uneven wear problems caused by unilateral drive of a long roller shaft, making it particularly suitable for wide-width paving. The segmented rollers are shorter, making processing and heat treatment easier, and replacing worn sections is more economical than replacing the entire long roller. The front and rear rollers compact the mixture twice, equivalent to an "initial compaction + secondary compaction" effect, further improving the initial density and surface smoothness of the cold mix.

[0047] In one embodiment, the first side plate assembly 11 includes a first spiral mounting plate 111, a first roller mounting plate 112, and a second roller mounting plate 113. The first roller mounting plate 112 is slidably connected to both the first spiral mounting plate 111 and the second roller mounting plate 113. One side of the first set of fabric spiral components 21 is movably mounted on the first spiral mounting plate 111. One side of the first roller 31 is movably mounted on the first roller mounting plate 112, and one side of the second roller 33 is movably mounted on the second roller mounting plate 113. The second side plate assembly 12 includes a second spiral mounting plate, a third roller mounting plate, and a fourth roller mounting plate. The third roller mounting plate can be slidably connected to the second spiral mounting plate and the fourth roller mounting plate. One side of the second set of fabric spiral components 22 is movably mounted on the second spiral mounting plate. One side of the third roller 32 is movably mounted on the third roller mounting plate, and one side of the fourth roller 34 is movably mounted on the fourth roller mounting plate.

[0048] Specifically, the first side plate assembly 11 includes a first spiral mounting plate 111, a first roller mounting plate 112, and a second roller mounting plate 113. All three can be rigid plates welded or cast from steel plates and are arranged sequentially along the direction of advance of the paving box 1.

[0049] The first spiral mounting plate 111 is used to install the left end of the first set of fabric spiral components 21. The plate is fixedly connected to the main frame of the paving box 1 and does not move up and down with the roller.

[0050] The first roller mounting plate 112 is used to mount the left end of the first roller 31. This plate can slide up and down relative to both the first spiral mounting plate 111 and the second roller mounting plate 113. Specifically, lugs can be provided on both sides of the first roller mounting plate 112 near the first spiral mounting plate 111 and the second roller mounting plate 113. Correspondingly, lugs are also provided on the side of the first spiral mounting plate 111 and the second roller mounting plate 113 near the first roller mounting plate 112. The lugs of the first roller mounting plate 112 have elongated holes extending vertically. Pins are fixed at corresponding positions on the lugs of the first spiral mounting plate 111 and the second roller mounting plate 113. The pins pass through the elongated holes and can slide freely within them. It is understandable that the vertical sliding connection can also be achieved using methods such as guide rail slider pairs or guide posts + linear bearings. The first roller mounting plate 112 can slide up and down relative to the first spiral mounting plate 111 to adjust the height of the first roller 31 above the ground; the first roller mounting plate 112 can slide up and down relative to the first roller mounting plate 112 to adjust the height difference between the first roller 31 and the second roller 33.

[0051] The left end of the first set of fabric auger components 21 is movably mounted on the first auger mounting plate 111 via a bearing seat, allowing the auger shaft to rotate while the mounting plate remains stationary. The left end of the first roller 31 is movably mounted on the first roller mounting plate 112 via a bearing seat, allowing the roller to rotate, and the mounting plate can drive the roller to slide up and down. The left end of the second roller 33 is movably mounted on the second roller mounting plate 113 via a bearing seat, allowing the roller to rotate, and the mounting plate can drive the roller to slide up and down.

[0052] The second side panel assembly 12 is symmetrical to the first side panel assembly 11 and has the same function, which will not be described in detail here.

[0053] Understandably, protective covers can also be installed on the outer side of each mounting plate of the first side plate assembly 11 and the second side plate assembly 12 to prevent dust from contaminating bearings, chains and other accessories.

[0054] In this embodiment, the fabric auger, front roller, and rear roller are each mounted on an independent mounting plate. If any component is damaged, only the corresponding mounting plate needs to be removed for replacement, without disassembling the entire side panel assembly. The front and rear rollers, as well as the mounting plates on the left and right sides, can slide independently up and down, adapting to the longitudinal and transverse slopes and local unevenness of the original road surface, achieving a paving thickness accuracy of ±2mm. When the camber adjustment mechanism 13 changes the inclination angle of the left and right side panels, the mounting plates of each roller shaft can adaptively adjust along the sliding surface without interference. Decomposing the integral large side panel into multiple smaller plates reduces the difficulty of casting or welding, resulting in high material utilization and lower costs.

[0055] In one embodiment, the cold-mix asphalt self-leveling intelligent paving system further includes a hydraulic height adjustment mechanism 5, which is used to drive the double roller mechanism 3 to slide up and down.

[0056] Specifically, the hydraulic height adjustment mechanism 5 is used to adjust the height of the double roller mechanism 3 as a whole, at which time the height difference between the front roller and the rear roller is constant.

[0057] The hydraulic height adjustment mechanism 5 includes hydraulic cylinders, one on each side. Taking the left hydraulic cylinder as an example, this hydraulic cylinder is fixedly mounted on the bracket of the paving box 1. The lower end of the piston rod of the hydraulic cylinder is hinged to the upper end of the first rear frame 14 through a connecting lug. The first rear frame 14 is connected to the first roller mounting plate 112 and the second roller mounting plate 113. When the hydraulic cylinder extends, the piston rod pushes the first rear frame 14 to slide downward, causing the first roller mounting plate 112 and the second roller mounting plate 113 to lower, thereby causing the first roller 31 and the second roller 33 to lower. When the cylinder retracts, it pulls the rear frame to slide upward, causing the first roller mounting plate 112 and the second roller mounting plate 113 to rise, thereby causing the first roller 31 and the second roller 33 to rise.

[0058] The hydraulic height adjustment mechanism 5 is the actuator of the automatic leveling system 4. Specifically, when the automatic leveling system 4 detects a sudden increase in ground height, it controls the hydraulic height adjustment mechanism 5 to raise the double-roller mechanism 3; conversely, when it detects a sudden decrease in ground height, it controls the hydraulic height adjustment mechanism 5 to lower the double-roller mechanism 3. The hydraulic height adjustment mechanism 5 works in conjunction with the automatic leveling system 4 to achieve a complete closed loop of detection-calculation-execution-feedback.

[0059] In one embodiment, the paving box 1 further includes a first rear frame 14 and a second rear frame 15; one side of the first rear frame 14 is connected to the first roller mounting plate 112 and the second roller mounting plate 113, the other side of the first rear frame 14 is connected to one side of the second rear frame 15 with adjustable camber, and the other side of the second rear frame 15 is connected to the third roller mounting plate and the fourth roller mounting plate. The dual-roller mechanism 3 also includes a first manual height adjustment mechanism 37, which is mounted on the first rear frame 14 and the second rear frame 15 and connected to the first roller 31 and the third roller 32 to adjust the relative height between the first roller 31, the third roller 32 and the second roller 33 and the fourth roller 34.

[0060] Specifically, a first rear frame 14 and a second rear frame 15 are provided at the rear of the paving box 1, i.e., the area behind the twin-roller mechanism 3, to enhance structural rigidity and provide a mounting base for the manual adjustment mechanism. The first rear frame 14 and the second rear frame 15 are connected by an adjustable camber connection, including lugs installed on both the first and second rear frames, with a camber adjustment rod 132 connecting between the two lugs. This allows the left and right rear frames to rotate relative to each other at a certain angle in the vertical plane, thereby adapting to changes in the camber of the paving cross-section and cooperating with the aforementioned camber adjustment mechanism 13. Simultaneously, this connection maintains rigidity in the horizontal direction, ensuring that the left and right rear frames do not separate.

[0061] The first rear frame 14 is rigidly connected to the second roller mounting plate 113 and connected to the first roller mounting plate 112 via a threaded rod, so that the first roller mounting plate 112 can move up and down relative to the first rear frame 14. The second rear frame 15 is symmetrical to the first rear frame 14.

[0062] The first manual height adjustment mechanism 37 includes a first mounting base and a second mounting base, which are fixedly mounted on the first rear frame 14 and the second rear frame 15, respectively. A connecting plate is installed between the first mounting base and the second mounting base. A threaded hole is opened in the center of the connecting plate, through which a height adjustment screw passes. The upper end of the height adjustment screw is connected to a turntable, and the lower end of the height adjustment screw is connected to both the first roller 31 and the third roller 32 via a connector. It cooperates with the threaded rods connecting the first rear frame 14 and the first roller shaft mounting plate 112, and the threaded rods connecting the second rear frame 15 and the third roller shaft mounting plate, so that the first manual height adjustment mechanism 37 can adjust the height of the front roller to adjust the relative height between the front roller and the rear roller. For example, for a thinner cold mix, the front roller is adjusted to be 2-5 mm higher than the rear roller, so that the front roller initially flattens the mixture, and the rear roller then compacts it, avoiding displacement. For a drier mixture, the front and rear rollers can be adjusted to the same height to achieve simultaneous strong compaction by both rollers. When it is necessary to change the paving thickness, the double roller mechanism 3 is first raised and lowered as a whole by the hydraulic height adjustment mechanism 5, and then the height difference between the front and rear rollers is finely adjusted by the first manual height adjustment mechanism 37.

[0063] Before or during construction, operators manually rotate the turntable to adjust the height difference between the front and rear rollers according to the characteristics of the mixture, paving thickness, and compaction process. During paving, the relative height between the front and rear rollers is locked by the first manual height adjustment mechanism 37 and remains constant. When the road surface suddenly becomes higher or lower, the automatic leveling system 4, in conjunction with the hydraulic height adjustment mechanism 5, can dynamically adjust the overall height of the front and rear rollers.

[0064] In this embodiment, a manual height adjustment mechanism is used, which does not require hydraulic or electrical control, is low in cost, not easily damaged, and is suitable for harsh construction environments; the left and right rear frames are connected by an adjustable camber, which allows the manual height adjustment mechanism to still work normally while the camber is adjusted; operators can quickly adjust without tools and adapt to different working conditions.

[0065] The front roller is composed of a first roller 31 (left section) and a third roller 32 (right section) connected by an adjustable camber connector. The rear roller is composed of a second roller 33 (left section) and a fourth roller 34 (right section) connected by an adjustable camber connector. Because the left and right sections need to be hinged to achieve angle changes, a certain axial gap inevitably exists between the two roller sections; otherwise, they cannot rotate relative to each other. The road surface area corresponding to this gap cannot be compacted during dual-roller compaction, forming a longitudinal loose band that affects the overall density and waterproofing performance of the road surface.

[0066] In one embodiment, the cold-mix asphalt mixture self-leveling intelligent paving system further includes a third roller assembly 6; the third roller assembly 6 is mounted on the first rear frame 14 and / or the second rear frame 15; The third roller assembly 6 includes a fifth roller 61 and a third drive mechanism 62; the fifth roller 61 is arranged parallel to the first roller 31; the fifth roller 61 is used to fill the compaction gap between the first roller 31 and the third roller 32, and between the second roller 33 and the fourth roller 34. The third drive mechanism 62 is used to drive the fifth roller 61.

[0067] Specifically, the fifth roller 61 is a short cylinder that covers the gaps of the front roller and the rear roller. The axis of the fifth roller 61 is parallel to the axes of the first roller 31, the second roller 33, the third roller 32, and the fourth roller 34. The fifth roller 61 is positioned behind the rear roller along the travel direction and covers the gaps of the front roller and the rear roller.

[0068] The third drive mechanism 62 can be a hydraulic motor, which, together with a reducer, drives the fifth roller 61.

[0069] The third roller assembly 6 can be installed on the first rear frame 14 alone, or on the second rear frame 15 alone, or on a bracket spanning the first rear frame 14 and the second rear frame 15; when installed on a bracket spanning the first rear frame 14 and the second rear frame 15, the bracket must be able to adjust the camber.

[0070] During the paving operation, the front roller performs the initial compaction of the mixture, the rear roller performs the second compaction, and the fifth roller 61 further compacts the mixture between the front roller and the rear roller.

[0071] In this embodiment, the third roller assembly 6 effectively fills the longitudinal gap caused by the adjustable arch connection of the segmented rollers, ensuring that the paving layer is dense and uniform throughout its entire width, without any loose zones.

[0072] Understandably, when the third roller assembly 6 is not set, the gap between the front roller and the rear roller can be misaligned to compensate for the defects caused by the gap.

[0073] In one embodiment, the third roller assembly 6 further includes a second manual height adjustment mechanism 63 for adjusting the height of the fifth roller 61.

[0074] Specifically, the second manual height adjustment mechanism 63 includes a mounting bracket fixed to the first rear frame 14 or the second rear frame 15. The mounting bracket has a threaded hole through which a threaded rod passes. One end of the threaded rod is connected to a mounting frame, which is used to mount the fifth roller 61 and the third drive mechanism 62. The other end of the threaded rod is connected to a turntable. By rotating the turntable, the mounting frame can be moved up and down, thereby adjusting the height of the fifth roller 61 relative to the ground. Normally, the height of the fifth roller 61 relative to the ground is the same as the height of the rear roller relative to the ground.

[0075] When the automatic leveling system 4 adjusts the height of the double roller mechanism 3, it will simultaneously adjust the height of the third roller assembly 6.

[0076] In paving construction, to obtain a uniform paving thickness, it is necessary to monitor the height change of the dual rollers relative to a reference (such as the original road surface or paved layer) in real time and automatically adjust the roller height. This application adopts a mechanical height measurement scheme using an angle sensor 41 and a slipper 42, which has the advantages of simple structure, strong anti-pollution ability, and low cost.

[0077] In one embodiment, the automatic leveling system 4 includes an angle sensor 41, a slipper 42, and a probe 44; A sliding shoe 42 is fixedly installed at the bottom of the first side panel assembly 11; The first side plate assembly 11 includes a first bracket 114, the first bracket 114 and the first roller 31 remain in a fixed relative position, the first bracket 114 is connected to the angle sensor 41, the angle sensor 41 and the probe rod 44 are connected through a first support rod 43, one end of the first support rod 43 is fixedly connected to the rotating shaft of the angle sensor 41, and the other end is hinged to the probe rod 44. As the probe rod 44 moves up and down, the angle sensor 41 outputs different angle signals.

[0078] Specifically, the sliding shoe 42 can be installed at the bottom of the first side plate assembly 11, the bottom of the second side plate assembly 12, and the middle bottom as needed. The sliding shoe 42 slides along the ground, supporting the weight of the entire system. Multiple installations make the entire system more stable. Furthermore, the sliding shoe 42 serves as a reference for automatic leveling.

[0079] The relative position of the first support 114 and the first roller 31 remains unchanged, and they can be driven by the same hydraulic cylinder. Specifically, the first support 114 includes a transverse support and a longitudinal support that are perpendicularly connected to each other. The other end of the longitudinal support is connected to the angle sensor 41, and the other end of the transverse support is connected to the piston rod of the hydraulic cylinder. It is understood that other connection methods can also be used, as long as the relative position of the first support 114 and the first roller 31 remains unchanged.

[0080] The first support rod 43 is a rigid connecting rod, one end of which is fixedly connected to the rotating shaft of the angle sensor 41, and the other end is hinged to the detection rod 44 (e.g., through a ball joint or pin).

[0081] Understandably, the automatic leveling system 4 also includes a controller, which can be a standalone unit or integrated into the main control system of the paving system.

[0082] As the paving system moves forward, the slipper 42 slides on the ground, and the bottom surface of the probe 44 contacts the ground. If a bump or depression appears on the ground, the probe 44 is forcibly lifted upwards or lowered downwards, while the slipper 42 continues to slide on the reference ground. Since the probe 44 is connected to the rotation shaft of the angle sensor 41 via the first support rod 43, the up-and-down movement of the probe 44 causes the first support rod 43 to swing around the rotation shaft of the angle sensor 41, thereby changing the angle between the first support rod 43 and the reference, i.e., the slipper 42. The angle sensor 41 detects this angle change in real time. The angle sensor 41 transmits the angle signal to the controller. The controller calculates the lifting height of the first roller 31, i.e., the difference between the actual paving thickness and the set value, based on a preset trigonometric function relationship (known support rod length, sensor installation position, etc.). The controller outputs a control signal to the hydraulic height adjustment mechanism 5, driving the first roller 31 to move up and down until the signal fed back by the angle sensor 41 returns to the angle value corresponding to the set thickness. At this time, the height of the first roller 31 is adjusted so that the paving thickness equals the set value. The above detection-calculation-adjustment process is carried out continuously to achieve dynamic automatic leveling.

[0083] Understandably, slippers 42, angle sensors 41, a second bracket, a second support rod, and a second probe rod can be symmetrically installed on the right side of the paving box 1 to achieve independent automatic leveling on the right side. It is also understandable that the automatic leveling systems 4 on the left and right sides can work independently or collaboratively control the overall cross slope via a controller.

[0084] In this embodiment, a slipper 42 is used as a road surface reference following element, in conjunction with a mechanical linkage and an angle sensor 41, eliminating the need for complex components; the angle sensor 41 has high resolution, meeting the construction accuracy requirements of micro-surfacing and ultra-thin overlay.

[0085] In one embodiment, the cold-mix asphalt self-leveling intelligent paving system further includes a foot pedal 7, which is located behind the paving box 1 along the direction of travel.

[0086] Specifically, the foot pedal 7 can be connected to the first rear frame 14 and the second rear frame 15 by welding or bolting. The foot pedal 7 is used for the operator to stand or walk.

[0087] In this embodiment, the operator stands or walks on the foot pedal 7, facilitating observation of the paved layer surface quality, the compaction of the twin rollers, and the distribution of the mixture. The operator can stand on the foot pedal 7 to easily clean the mixture adhering to the twin rollers or scraper, and to perform routine inspections and maintenance. The foot pedal 7 itself and the person standing on it increase the weight at the rear of the paving box 1, which helps improve the compaction effect of the twin rollers (especially when paving thicker or harder mixtures). When the automatic leveling system 4 is working, the operator can stand on the foot pedal 7 to observe the contact between the slipper 42 and the reference surface, and whether the roller height adjustment is timely.

[0088] Understandably, each of the aforementioned first roller 31, second roller 33, third roller 32, fourth roller 34, and fifth roller 61 is equipped with scrapers on both the front and rear sides along the travel direction. The length of the scrapers covers the entire working width of the rollers. The scrapers are used to remove the mixture adhering to the roller surface and prevent material accumulation from affecting the compaction quality.

[0089] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A self-leveling intelligent paving system for cold-mix asphalt mixtures, characterized in that, include: The paving box (1) includes a first side plate assembly (11) and a second side plate assembly (12) disposed opposite to each other. Fabric spiral mechanism (2), the fabric spiral mechanism (2) is disposed between the first side plate assembly (11) and the second side plate assembly (12); A double roller mechanism (3) is movably mounted between the first side plate assembly (11) and the second side plate assembly (12); and the double roller mechanism (3) is located behind the fabric spiral mechanism (2) along the travel direction. Automatic leveling system (4), which is set on the paving box (1) and linked with the double roller mechanism (3), is used to dynamically adjust the paving thickness.

2. The self-leveling intelligent paving system for cold-mix asphalt mixtures according to claim 1, characterized in that, The paving box (1) also includes an arch adjustment mechanism (13), which is located in the middle of the paving box (1); The fabric spiral mechanism (2) includes a first set of fabric spiral components (21) and a second set of fabric spiral components (22); one side of the first set of fabric spiral components (21) is connected to the first side plate assembly (11), and the other side of the first set of fabric spiral components (21) is connected to the arch adjustment mechanism (13); one side of the second set of fabric spiral components (22) is connected to the arch adjustment mechanism (13), and the other side of the second set of fabric spiral components (22) is connected to the second side plate assembly (12).

3. The self-leveling intelligent paving system for cold-mix asphalt mixtures according to claim 2, characterized in that, The dual-roller mechanism (3) includes a first roller assembly and a second roller assembly; The first roller assembly includes a first roller (31), a third roller (32), and a first drive mechanism (35). One side of the first roller (31) is connected to the first side plate assembly (11), and the other side of the first roller (31) is connected to one side of the third roller (32) with adjustable camber. The other side of the third roller (32) is connected to the second side plate assembly (12). The first drive mechanism (35) is disposed on the first side plate assembly (11) and is used to drive the first roller (31) and the third roller (32). The second roller assembly includes a second roller (33) and a fourth roller (34) and a second drive mechanism (36). One side of the second roller (33) is connected to the first side plate assembly (11), and the other side of the second roller (33) is connected to one side of the fourth roller (34) with adjustable arch. The other side of the fourth roller (34) is connected to the second side plate assembly (12). The second roller (33) and the fourth roller (34) are arranged in parallel with the first roller (31) and the third roller (32), respectively. The first roller (31) and the third roller (32) are arranged on the side close to the fabric spiral mechanism (2). The second drive mechanism (36) is arranged on the second side plate assembly (12) and is used to drive the second roller (33) and the fourth roller (34).

4. The self-leveling intelligent paving system for cold-mix asphalt mixtures according to claim 3, characterized in that, The first side plate assembly (11) includes a first spiral mounting plate (111), a first roller mounting plate (112), and a second roller mounting plate (113). The first roller mounting plate (112) can be slidably connected to the first spiral mounting plate (111) and the second roller mounting plate (113). One side of the first set of fabric spiral components (21) is movably mounted on the first spiral mounting plate (111). One side of the first roller (31) is movably mounted on the first roller mounting plate (112), and one side of the second roller (33) is movably mounted on the second roller mounting plate (113). The second side plate assembly (12) includes a second spiral mounting plate, a third roller mounting plate and a fourth roller mounting plate. The third roller mounting plate can be slidably connected to the second spiral mounting plate and the fourth roller mounting plate. One side of the second set of fabric spiral components (22) is movably mounted on the second spiral mounting plate. One side of the third roller (32) is movably mounted on the third roller mounting plate, and one side of the fourth roller (34) is movably mounted on the fourth roller mounting plate.

5. The self-leveling intelligent paving system for cold-mix asphalt mixtures according to claim 4, characterized in that, It also includes a hydraulic height adjustment mechanism (5), which is used to drive the double roller mechanism (3) to slide up and down.

6. The self-leveling intelligent paving system for cold-mix asphalt mixtures according to claim 4, characterized in that, The paving box (1) also includes a first rear frame (14) and a second rear frame (15); one side of the first rear frame (14) is connected to the first roller mounting plate (112) and the second roller mounting plate (113), the other side of the first rear frame (14) is connected to one side of the second rear frame (15) with adjustable camber, and the other side of the second rear frame (15) is connected to the third roller mounting plate and the fourth roller mounting plate; The dual-roller mechanism (3) further includes a first manual height adjustment mechanism (37), which is mounted on the first rear frame (14) and the second rear frame (15) and connected to the first roller (31) and the third roller (32) to adjust the relative height between the first roller (31), the third roller (32) and the second roller (33) and the fourth roller (34).

7. The self-leveling intelligent paving system for cold-mix asphalt mixtures according to claim 6, characterized in that, It also includes a third roller assembly (6); the third roller assembly (6) is mounted on the first rear frame (14) and / or the second rear frame (15); The third roller assembly (6) includes a fifth roller (61) and a third drive mechanism (62); the fifth roller (61) is arranged parallel to the first roller (31); the fifth roller (61) is used to fill the compaction gap between the first roller (31) and the third roller (32), and between the second roller (33) and the fourth roller (34); The third drive mechanism (62) is used to drive the fifth roller (61).

8. The self-leveling intelligent paving system for cold-mix asphalt mixtures according to claim 7, characterized in that, The third roller assembly (6) further includes a second manual height adjustment mechanism (63) for adjusting the height of the fifth roller (61).

9. The self-leveling intelligent paving system for cold-mix asphalt mixtures according to claim 8, characterized in that, The automatic leveling system (4) includes an angle sensor (41), a slipper (42), and a probe (44). The first side plate assembly (11) is fixedly provided with the slipper (42) at its bottom; The first side plate assembly (11) includes a first bracket (114), the first bracket (114) and the first roller (31) remain in the same relative position, the first bracket (114) is connected to the angle sensor (41), the angle sensor (41) and the probe rod (44) are connected through a first support rod (43), one end of the first support rod (43) is fixedly connected to the rotating shaft of the angle sensor (41), and the other end is hinged to the probe rod (44); As the probe rod (44) moves up and down, the angle sensor (41) outputs different angle signals.

10. The self-leveling intelligent paving system for cold-mix asphalt mixtures according to claim 1, characterized in that, It also includes a foot pedal (7), which is located behind the paving box (1) in the direction of travel.

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