Crack filling device for asphalt pavement and pavement repairing vehicle

Abstract

The utility model provides a kind of asphalt pavement crack filling device and pavement repair vehicle, belong to road maintenance field, it includes mixing mechanism and leveling mechanism, mixing mechanism includes mixing box and discharge hopper, mixing box includes box main body and stirring frame, stirring frame is rotatably arranged in mixing box, discharge hopper top and the bottom of mixing box are communicated, bottom is equipped with the discharge port of output material;Leveling mechanism includes scraper and compression roller sequentially arranged downstream of discharge hopper, gap redundancy is formed between scraper and pavement, gap redundancy makes material protrude on pavement, compression roller is used to make material flush with pavement.Compared with prior art, the utility model integrates mixing mechanism and leveling mechanism, solves the technical problem that existing asphalt pavement crack repair is prone to defects.

Description

Technical Field

[0001] This utility model belongs to the field of road maintenance, and more specifically, it relates to a crack filling device for asphalt pavement. This utility model also relates to a road repair vehicle equipped with the aforementioned crack filling device for asphalt pavement. Background Technology

[0002] Asphalt pavement is one of the most widely used high-grade pavements in road construction. With the increasing volume of highway traffic, heavy vehicles and overloading are becoming increasingly serious problems. Coupled with the influence of various environmental factors such as pavement structure, climate, topography, geological conditions, and traffic load, the base layer, whether flexible or semi-rigid, will develop cracks of varying degrees and shapes. Effectively treating various pavement cracks, preventing surface water from entering the base layer through the cracks, and also preventing groundwater from entering the pavement surface through the cracks, can significantly extend the service life of the pavement.

[0003] Generally, cracks in asphalt concrete pavements can be broadly classified into two types. The first type is load-induced cracks: these are cracks primarily caused by traffic loads. Under vehicle loads, tensile stress is generated at the bottom of the semi-rigid base layer. If this tensile stress exceeds the tensile strength of the base layer material, the bottom of the base layer will quickly crack, eventually affecting the asphalt surface layer. The second type is non-load-induced cracks: these are mainly temperature cracks, including low-temperature shrinkage cracks and temperature fatigue cracks; these are cracks caused by improper construction techniques or the use of substandard materials.

[0004] In existing technologies, cracks in asphalt pavements are generally repaired using an oil-filling repair method. Specifically, the crack walls are heated to a viscous state, then asphalt or asphalt mortar is sprayed into the crack, followed by a layer of dry, clean stone chips or coarse sand for protection. Finally, a light roller is used to compact the aggregate. For small cracks, they are first widened with a disc milling cutter before being treated as described above, and a small amount of low-viscosity asphalt is applied along the crack.

[0005] Existing repair methods, due to the complex internal structure of cracks, make it difficult to control the flow of fluid repair materials (such as asphalt, asphalt mortar, epoxy mortar, etc.) within the cracks. This can easily lead to cavities within the cracks, and cracks with repair defects are prone to reforming during subsequent use, requiring rework and repair. The construction effect cannot meet the needs of road use and urgently needs improvement. Utility Model Content

[0006] The purpose of this invention is to provide a crack filling device for asphalt pavement to solve the technical problem that existing asphalt pavement crack repair methods are prone to defects.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a crack filling device for asphalt pavement, comprising: A mixing mechanism includes a mixing tank and a discharge hopper. The mixing tank includes a tank body and a mixing frame. The mixing frame is rotatably disposed inside the mixing tank. The top of the discharge hopper is connected to the bottom of the mixing tank, and the bottom is provided with a discharge port for discharging materials. The leveling mechanism includes a scraper and a pressure roller arranged sequentially downstream of the discharge hopper. The scraper has a redundant gap with the road surface, which allows the material to protrude from the road surface. The pressure roller is used to make the material flush with the road surface.

[0008] In one possible implementation, the stirring rack includes a stirring main shaft, stirring arms, and stirring blades all disposed within the main body of the tank. The stirring main shaft is rotatably disposed within the main body of the tank, and the rotation axis of the stirring main shaft extends horizontally. One end of each stirring arm is connected to the stirring main shaft, and the other end is provided with the stirring blade. There are multiple stirring arms, and each stirring arm is evenly arranged around the axis of the stirring main shaft.

[0009] In one possible implementation, the mixing mechanism further includes an outer casing, the main casing being disposed within the outer casing, the two ends of the stirring shaft being rotatably adapted to the casing wall of the outer casing, the discharge port of the discharge hopper protruding from the outer wall of the outer casing, a first inlet being provided at the top of the outer casing, and a second inlet being provided at the top of the main casing, with the first inlet and the second inlet corresponding vertically.

[0010] In one possible implementation, the mixing mechanism further includes a flip cover with a first feed inlet located on the top of the outer casing, the flip cover having a handle on the side opposite to the first feed inlet.

[0011] In one possible implementation, the leveling mechanism includes a swing shaft and a tension spring, the scraper being detachably connected to the swing shaft, the scraper extending along the length of the swing shaft, and the tension spring being configured to have a preload that brings the scraper close to the road surface.

[0012] In one possible implementation, the leveling mechanism further includes a mounting plate and a stabilizer bar. The surface of the mounting plate is perpendicular to the swing axis, the length direction of the mounting plate is perpendicular to the swing axis, and the bottom of the mounting plate is rotatably adapted to the swing axis. The bottom of the stabilizer bar is fixedly connected to the swing axis, and the top of the mounting plate is elastically connected to the top of the stabilizer bar via a tension spring. The tension spring is configured to have a preload force that moves the top of the stabilizer bar and the top of the mounting plate away from each other.

[0013] In one possible implementation, the leveling mechanism further includes a support wheel, which is rotatably coaxially sleeved on the outer periphery of the swing shaft, and the radius of the support wheel is greater than the width of the scraper.

[0014] In one possible implementation, the main body of the tank is cylindrical and coaxial with the stirring shaft.

[0015] Compared with existing technologies, the beneficial effects of the asphalt pavement crack filling device provided by this utility model are as follows: First, the mixing mechanism provides uniformly mixed filling material and outputs it through the outlet. In the leveling mechanism, the redundant gap between the scraper and the road surface causes the output material to form a slightly raised bulge above the crack. Then, the pressure roller follows closely to roll the raised material, realizing the filling process of pre-shaping the material into a slightly raised state before compaction. This makes the material more compact and deeper into the crack, reducing internal voids and forming a more stable connection structure with the original road surface structure. This helps to solve the technical problems that may exist in traditional filling methods, such as incomplete filling, poor bonding between the material and the crack wall, and susceptibility to falling off or cracking due to vehicle rolling and temperature changes.

[0016] Secondly, this invention utilizes a horizontal main shaft to drive evenly distributed stirring arms / blades to thoroughly stir the material within a cylindrical chamber. Combined with the inlet and flip-top design, this ensures uniform composition, stable temperature, and protection from contamination of the filling material, laying the foundation for high-quality filling. After the material is discharged through the hopper, the elastically supported scraper and support wheel, with a pre-set elastic gap redundancy, form a uniformly raised material band slightly higher than the road surface above the crack. The material raised by the scraper is then tightly compacted by the pressure roller, causing the material to deeply embed itself into the crack and level with the road surface, improving filling density and interfacial bonding, and effectively preventing detachment and cracking.

[0017] Another objective of this invention is to provide a road repair vehicle, including the asphalt pavement crack filling device mentioned above.

[0018] Compared with the prior art, the road repair vehicle of this utility model has all the advantages of the above-mentioned crack filling device for asphalt pavement, which will not be elaborated here. Moreover, the road repair vehicle of this utility model also realizes the organic combination of crack filling operation and vehicle mobile platform, integrating the functions of mixing, conveying, scraping and compaction and being able to move with the vehicle. This achieves the technical effect of greatly improving the mobility, continuity and construction efficiency of crack repair operation, and solves the technical problem that traditional small handheld or fixed equipment is inefficient and unable to meet the needs of long-distance or large-area crack repair. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, 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 utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1 A schematic diagram of the overall structure of the crack filling device for asphalt pavement provided by this utility model; Figure 2 A schematic diagram showing the positional relationship between the main body of the box and the outer box in the asphalt pavement crack filling device provided by this utility model; Figure 3 A schematic diagram of the leveling mechanism in the asphalt pavement crack filling device provided by this utility model.

[0020] In the picture: 1. Mixing mechanism; 11. Mixing tank; 111. Tank body; 112. Mixing frame; 12. Discharge hopper; 13. Outer casing; 14. Flip-top; 2. Leveling mechanism; 21. Scraper; 22. Pressure roller; 23. Swing shaft; 24. Tension spring; 25. Mounting plate; 26. Support wheel; 27. Stabilizer bar. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] In the description of this utility model, it should be noted that if terms such as "upper", "lower", "inner", "back" or indicating orientation or positional relationship appear, they are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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 utility model.

[0023] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0024] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0025] Please refer to the following: Figures 1 to 3 The present invention provides a crack filling device for asphalt pavement. This crack filling device includes a mixing mechanism 1 and a leveling mechanism 2. The mixing mechanism 1 includes a mixing tank 11 and a discharge hopper 12. The mixing tank 11 includes a main body 111 and a mixing frame 112, which is rotatably disposed within the mixing tank 11. The top of the discharge hopper 12 is connected to the bottom of the mixing tank 11, and the bottom has a discharge port for discharging material. The leveling mechanism 2 includes a scraper 21 and a pressure roller 22 sequentially disposed downstream of the discharge hopper 12. The scraper 21 has a redundant gap with the pavement, allowing the material to protrude beyond the pavement. The pressure roller 22 is used to make the material flush with the pavement.

[0026] In the specific implementation process of the above embodiments, the mixing mechanism 1 provides uniformly mixed filling material and outputs it through the discharge port; the gap between the scraper 21 in the leveling mechanism 2 and the road surface is redundant, so that the output material forms a bulge slightly higher than the road surface above the crack. Then, the pressure roller 22 follows closely to roll the bulge material, realizing the filling process of the material being pre-shaped into a slightly convex state and then compacted. This makes the material more compact and deeper into the crack, reduces the internal voids, and forms a more stable connection structure with the original road surface structure. This helps to solve the technical problems that may exist in traditional filling methods, such as incomplete filling, poor bonding between the material and the crack wall, and easy detachment or cracking due to vehicle rolling and temperature changes.

[0027] In addition to the feasible implementations described above, in a preferred embodiment, the mixing frame 112 includes a mixing main shaft, mixing arms, and mixing blades all disposed within the main body 111. The mixing main shaft is rotatably disposed within the main body 111, and the axis of rotation of the mixing main shaft extends horizontally. One end of each mixing arm is connected to the mixing main shaft, and the other end is provided with a mixing blade. There are multiple mixing arms, and each mixing arm is evenly arranged around the axis of the mixing main shaft. As configured above, the horizontally disposed mixing main shaft drives multiple mixing arms and mixing blades evenly arranged around its axis to rotate within the main body 111 during rotation, driving the material to move towards the discharge hopper 12. This provides thorough and uniform three-dimensional mixing of the material (such as asphalt mixture) within the main body 111, effectively preventing material segregation and agglomeration, ensuring uniform composition and temperature of the filling material, and solving the technical problem of inconsistent filler strength, easy loosening or cracking caused by uneven material mixing, which affects the quality and durability of crack repair.

[0028] In a preferred embodiment, the mixing mechanism 1 further includes an outer casing 13, with the main casing 111 disposed within the outer casing 13. The two ends of the stirring spindle are rotatably adapted to the casing wall of the outer casing 13. The discharge port of the discharge hopper 12 protrudes from the outer wall of the outer casing 13. A first feed port is provided at the top of the outer casing 13, and a second feed port is provided at the top of the main casing 111. The first and second feed ports are vertically aligned. The outer casing 13 provides stable support for the stirring spindle and forms a certain degree of enclosed protection for the stirring process. This achieves the technical effects of improving the overall structural rigidity and operational stability of the equipment, reducing material splashing losses during the feeding process, and improving the working environment. It is beneficial to solve the technical problems of large equipment vibration affecting the mixing quality, inconvenient feeding, and material waste.

[0029] In a preferred embodiment, the mixing mechanism 1 further includes a flip cover 14, which is foldable and has a first feed inlet on the top of the outer casing 13. The flip cover 14 has a handle on the side opposite to the first feed inlet to facilitate opening and closing of the feed inlet. It is easy to open when adding materials and can effectively close the feed inlet during mixing and operation to prevent dust and foreign objects from entering or materials from splashing out.

[0030] In a preferred embodiment, the leveling mechanism 2 includes a swing shaft 23 and a tension spring 24. A scraper 21 is detachably connected to the swing shaft 23, extending along the length of the swing shaft 23. The tension spring 24 is configured to have a preload force that brings the scraper 21 close to the road surface. In this structure, the scraper 21 is swingably connected via the swing shaft 23, and the tension spring 24 provides a preload force that brings the scraper 21 close to the road surface. Under the action of the tension spring 24, the scraper 21 can adaptively conform to the uneven road surface. Simultaneously, the reference gap between the scraper 21 and the road surface can be set by adjusting or utilizing the preload force of the tension spring 24. Furthermore, the preload force of the scraper 21 can also initially compact the material, working in conjunction with the subsequent pressure roller 22 to improve the compaction effect.

[0031] In a preferred embodiment, the leveling mechanism 2 further includes a mounting plate 25 and a stabilizing rod 27. The surface of the mounting plate 25 is perpendicular to the swing shaft 23, and the length direction of the mounting plate 25 is perpendicular to the swing shaft 23. The bottom of the mounting plate 25 is rotatably adapted to the swing shaft 23. The bottom of the stabilizing rod 27 is fixedly connected to the swing shaft 23. The top of the mounting plate 25 is elastically connected to the top of the stabilizing rod 27 via a tension spring 24. The tension spring 24 is configured to have a preload force that moves the top of the stabilizing rod 27 and the top of the mounting plate 25 away from each other. In this embodiment, under the action of the mounting plate 25, the force of the tension spring 24 is more effectively transmitted to the scraper 21 through the lever action of the stabilizing rod 27, making the swing and ground pressure of the scraper 21 more stable and controllable, optimizing the force state of the scraper 21, improving its sensitivity and stability in following road undulations, and providing a certain amount of redundancy for the scraper 21 to level the material.

[0032] In a preferred embodiment, the leveling mechanism 2 further includes a support wheel 26, which is rotatably coaxially sleeved on the outer periphery of the swing shaft 23, and the radius of the support wheel 26 is greater than the width of the scraper 21. During the movement of the equipment, the support wheel 26 contacts the protruding obstacles on the road surface before the scraper 21, and drives the swing shaft 23 and the scraper 21 to be lifted as a whole over the obstacle. The fact that the radius of the support wheel 26 is greater than the width of the scraper 21 provides redundant clearance for the leveling of the scraper 21, making the structural arrangement of the entire leveling mechanism 2 more reasonable.

[0033] In a preferred embodiment, the main body 111 of the mixing tank is cylindrical and coaxial with the mixing spindle. This allows the mixing spindle to drive the mixing arms and mixing blades to perform the smoothest and least resistant rotational mixing within the cylindrical space, optimizing the mixing flow field, reducing dead zones, improving mixing efficiency and uniformity, and solving the problems of uneven mixing, high energy consumption, or material accumulation in corners that may exist in non-circular mixing tanks 11.

[0034] In summary, compared to existing technologies, in the specific implementation process of this utility model, the mixing mechanism 1 provides uniformly mixed filling material and outputs it through the discharge port; in the leveling mechanism 2, the redundant gap between the scraper 21 and the road surface causes the output material to form a slightly higher bulge above the road surface above the crack, which is then tightly compacted by the pressure roller 22. The horizontal main shaft drives the evenly distributed stirring arms / plates to fully stir within the cylindrical box. Combined with the design of the inlet and the flip cover 14, this ensures that the filling material has uniform composition, stable temperature, and is free from contamination, laying the foundation for high-quality filling. After the material is output through the discharge hopper 12, the elastically supported scraper 21 and the support wheel 26, with their pre-set elastic redundant gap, form a uniformly raised material band slightly higher than the road surface above the crack. The material bulge formed by the scraper 21 is then tightly compacted by the pressure roller 22, causing the material to deeply embed into the crack and level with the road surface, improving the filling density and interfacial bonding force, and effectively preventing detachment and cracking.

[0035] Based on the same inventive concept, this utility model also proposes a road repair vehicle, which includes the asphalt pavement crack filling device mentioned above.

[0036] Compared with the prior art, the road repair vehicle of this utility model has all the advantages of the above-mentioned crack filling device for asphalt pavement, which will not be elaborated here. Moreover, the road repair vehicle of this utility model also realizes the organic combination of crack filling operation and vehicle mobile platform, integrating the functions of mixing, conveying, scraping and compaction and being able to move with the vehicle. This achieves the technical effect of greatly improving the mobility, continuity and construction efficiency of crack repair operation, and solves the technical problem that traditional small handheld or fixed equipment is inefficient and unable to meet the needs of long-distance or large-area crack repair.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A crack filling device for asphalt pavement, characterized in that, include: The mixing mechanism (1) includes a mixing tank (11) and a discharge hopper (12). The mixing tank (11) includes a tank body (111) and a mixing frame (112). The mixing frame (112) is rotatably disposed inside the mixing tank (11). The top of the discharge hopper (12) is connected to the bottom of the mixing tank (11), and the bottom is provided with a discharge port for discharging materials. The leveling mechanism (2) includes a scraper (21) and a pressure roller (22) arranged sequentially downstream of the discharge hopper (12). The scraper (21) has a gap redundancy with the road surface, which allows the material to protrude from the road surface. The pressure roller (22) is used to make the material flush with the road surface.

2. The asphalt pavement crack filling device as described in claim 1, characterized in that, The stirring rack (112) includes a stirring spindle, stirring arms and stirring blades, all disposed within the main body (111). The stirring spindle is rotatably disposed within the main body (111), and the axis of rotation of the stirring spindle extends horizontally. One end of the stirring arm is connected to the stirring spindle, and the other end is provided with the stirring blade. There are multiple stirring arms, and each stirring arm is evenly arranged around the axis of the stirring spindle.

3. The crack filling device for asphalt pavement as described in claim 2, characterized in that, The mixing mechanism (1) also includes an outer box (13), the main body (111) is located in the outer box (13), the two ends of the stirring shaft are rotatably adapted to the box wall of the outer box (13), the discharge port of the discharge hopper (12) protrudes out of the outer wall of the outer box (13), the top of the outer box (13) is provided with a first feed port, the top of the main body (111) is provided with a second feed port, and the first feed port and the second feed port are vertically corresponding.

4. The asphalt pavement crack filling device as described in claim 3, characterized in that, The mixing mechanism (1) also includes a flip cover (14), which is foldable and has a first feed inlet on the top of the outer casing (13). The flip cover (14) has a handle on the side opposite to the first feed inlet.

5. The asphalt pavement crack filling device as described in claim 1, characterized in that, The leveling mechanism (2) includes a swing shaft (23) and a tension spring (24). The scraper (21) is detachably connected to the swing shaft (23). The length direction of the scraper (21) extends along the length direction of the swing shaft (23). The tension spring (24) is configured to have a preload force that brings the scraper (21) close to the road surface.

6. The crack filling device for asphalt pavement as described in claim 5, characterized in that, The leveling mechanism (2) further includes a mounting plate (25) and a stabilizing rod (27). The surface of the mounting plate (25) is perpendicular to the swing shaft (23), the length direction of the mounting plate (25) is perpendicular to the swing shaft (23), and the bottom of the mounting plate (25) is rotatably adapted to the swing shaft (23). The bottom of the stabilizing rod (27) is fixedly connected to the swing shaft (23). The top of the mounting plate (25) is elastically connected to the top of the stabilizing rod (27) through the tension spring (24). The tension spring (24) is configured to have a preload force that causes the top of the stabilizing rod (27) and the top of the mounting plate (25) to move away from each other.

7. The crack filling device for asphalt pavement as described in claim 5, characterized in that, The leveling mechanism (2) also includes a support wheel (26), which is rotatably and coaxially sleeved on the outer periphery of the swing shaft (23), and the radius of the support wheel (26) is greater than the width of the scraper (21).

8. The asphalt pavement crack filling device as described in claim 2, characterized in that, The main body of the tank (111) is cylindrical and coaxial with the stirring shaft.

9. A road repair vehicle, characterized in that, Includes a crack filling device for asphalt pavement as described in any one of claims 1 to 8.

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