Undisturbed in-situ recycling device and method for aged asphalt pavement

Abstract

This invention belongs to the field of highway pavement protection technology, and particularly relates to a undisturbed in-situ regeneration device for aged asphalt pavements. It includes a vehicle body, with a pavement cracking structure, a reactive liquid spraying structure, and an asphalt wiping structure sequentially arranged at the front end of the vehicle body. The pavement cracking structure is rotatably connected to the front end of the vehicle body, with its bottom end in contact with the ground. The reactive liquid spraying structure is fixedly connected to the front end of the vehicle body, with its output end facing the pavement cracking structure. The asphalt wiping structure is vertically slidably connected to the front end of the vehicle body. Utilizing these structures, a undisturbed in-situ regeneration device for aged asphalt pavements is achieved, capable of effectively wiping away the surface layer of aged asphalt pavements, reducing asphalt consumption, protecting the environment, and conserving resources.

Description

Technical Field

[0001] This invention belongs to the field of highway pavement protection technology, and particularly relates to a device and method for undisturbed in-situ regeneration of aged asphalt pavement. Background Technology

[0002] Asphalt pavement refers to various types of road surfaces constructed by incorporating road-grade asphalt into mineral materials. Asphalt binders enhance the ability of paving aggregates to resist damage from traffic and natural factors, resulting in a smooth, dust-free, impermeable, and durable surface. Therefore, asphalt pavement is one of the most widely used high-grade road surfaces in road construction. Currently, asphalt pavement is a major component of highways. However, after a period of use, common asphalt pavements tend to age and crack, affecting road traffic safety and necessitating road repair.

[0003] In existing technologies, asphalt pavement repair mainly involves mechanically stripping the asphalt layer completely, discarding or recycling the waste asphalt, and then laying new asphalt pavement. However, during asphalt pavement aging, only the outermost layer of asphalt (approximately 10mm thick) actually ages, while the inner asphalt remains usable. Removing the outermost layer of asphalt while retaining the inner asphalt not only saves resources, protects the environment, and saves manpower, but also increases the speed of asphalt pavement repair. Therefore, there is an urgent need for a device and method that can effectively strip away the outermost layer of aged asphalt pavement. Summary of the Invention

[0004] The purpose of this invention is to provide a device and method for the undisturbed in-situ regeneration of aged asphalt pavement, so as to solve the above-mentioned problems, save resources, reduce asphalt consumption, protect the environment, and improve the speed of asphalt pavement repair.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] An undisturbed in-situ recycling device for aged asphalt pavement includes a vehicle body, wherein the front end of the vehicle body is provided with a pavement cracking structure, a reaction liquid spraying structure, and an asphalt wiping structure in a front-to-back sequence.

[0007] The road surface cracking structure is rotatably connected to the front end of the vehicle body, and the bottom end of the road surface cracking structure is in contact with the ground; the reaction liquid spraying structure is fixedly connected to the front end of the vehicle body, and the output end of the reaction liquid spraying structure faces the road surface cracking structure; the asphalt wiping structure is vertically slidably connected to the front end of the vehicle body.

[0008] Preferably, the road surface cracking structure includes a protective shell, which is rotatably connected to the vehicle body. A chainsaw assembly connecting shaft is rotatably connected to the inner side of the protective shell. A plurality of road chainsaw assemblies are fixedly connected to the chainsaw assembly connecting shaft at equal intervals along its axial direction. A road chainsaw motor is fixedly connected to the top of the protective shell, and the output shaft of the road chainsaw motor is drively connected to the chainsaw assembly connecting shaft.

[0009] Preferably, the reaction liquid spraying structure includes a reaction liquid storage cylinder, which is fixedly connected to the inside of the vehicle body. The bottom end of the reaction liquid storage cylinder is fixedly connected to the input end of a liquid pump, and the output end of the liquid pump is fixedly connected to a transverse transmission pipe. Several hoses are fixedly connected to the transverse transmission pipe at equal intervals. A liquid nozzle is fixedly connected to the end of each hose away from the transverse transmission pipe, and the liquid nozzle corresponds to the road chainsaw assembly.

[0010] Preferably, the asphalt wiping structure includes a wiping telescopic cylinder, the top of which is fixedly connected to the vehicle body, and a fixing plate is fixedly connected to the bottom of which. The fixing plate is longitudinally slidably connected to the vehicle body, and a brush motor is vertically fixedly connected to the inner side of the fixing plate. A circular ground brush is fixedly connected to the output shaft of the brush motor, and the circular ground brush is in contact with the ground.

[0011] Preferably, the protective shell has a movable shaft and a fixed shaft at one end near the vehicle body. The fixed shaft is rotatably connected to the vehicle body, and a slotted telescopic cylinder is rotatably connected to the movable shaft. The end of the slotted telescopic cylinder away from the movable shaft is rotatably connected to the vehicle body.

[0012] Preferably, the rear end of the vehicle body is provided with a peeling shell, and the inner side of the peeling shell is provided with a peeling structure and a sweeping structure. The peeling structure and the sweeping structure are in contact with the ground, and the sweeping structure is located behind the peeling structure. The peeling structure includes a peeling telescopic motor. The top end of the peeling telescopic motor is fixedly connected to the inner side of the peeling shell, and the bottom end of the peeling telescopic motor is fixedly connected to a stabilizing thick plate. The stabilizing thick plate and the peeling shell are vertically slidably connected through a stabilizing slide rail. The bottom end of the stabilizing thick plate is fixedly connected to a plurality of equally spaced connecting columns, and the bottom end of the connecting columns is detachably connected to a peeling steel shovel head by bolts.

[0013] Preferably, the sweeping structure includes two symmetrically arranged tracked sweepers. Each tracked sweeper includes two drive belt fixed shafts rotatably connected to the inner side of the outer shell of the cover. A drive belt is sleeved between the two drive belt fixed shafts. Sweeping brushes are fixedly connected at equal intervals to the outer side of the drive belt. One of the drive belt fixed shafts is driven to a sweeping motor via a belt. A protective plate is fixedly connected between the two sweeping motors and the two drive belts.

[0014] Preferably, a protective inner shell is fixedly connected to the top of the road saw assembly, and an anti-splash brush is fixedly connected to the bottom of the protective outer shell.

[0015] The method of using the undisturbed in-situ recycling device for aged asphalt pavement includes:

[0016] S1. Investigate the aging of the road surface and determine the sections that need to be repaired;

[0017] S2. Clean the road surface;

[0018] S3. Use an in-situ undisturbed recycling device to create cracks in the road surface, spray a reaction liquid, and wipe away the emulsified aged asphalt pavement.

[0019] S4. Lay a new thin layer of asphalt on the asphalt pavement after the surface layer has been removed.

[0020] S5. Pave and maintain the new asphalt pavement.

[0021] Compared with the prior art, the present invention has the following advantages and technical effects:

[0022] In use, the road surface cracking structure first cuts several shallow cracks into the road surface. The depth of the shallow cracks is the same as the depth of the aged road surface to be removed. The opening of the shallow cracks increases the reaction area of ​​the reactive liquid, allowing the reactive liquid to react with the asphalt road surface better and faster. The output end of the reactive liquid spraying structure is directed towards the shallow cracks cut by the road surface cracking structure, spraying the reactive liquid directly onto the shallow cracks and the surrounding asphalt road surface. As the vehicle moves forward slowly, the asphalt wiping structure behind it works on the road surface sprayed with the reactive liquid, wiping away the outermost layer of emulsified asphalt.

[0023] By incorporating a road surface cracking structure, creating several shallow cracks effectively increases the emulsification speed of the reactant on the asphalt pavement. Aging pavement surfaces are typically difficult to emulsify; the shallow cracks disrupt the overall hard surface of the aging pavement, allowing the reactant to emulsify more quickly. This reduces the resistance encountered by the asphalt removal structure in removing aging pavement. Utilizing these structures, a undisturbed in-situ regeneration device for aging asphalt pavements is achieved, effectively removing the surface layer, reducing asphalt consumption, protecting the environment, and conserving resources. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of the present invention;

[0026] Figure 2 for Figure 1 Cross-sectional view of section AA;

[0027] Reference numerals: 1. Vehicle body; 2. Road surface cracking structure; 3. Reaction liquid spraying structure; 4. Asphalt wiping structure; 5. Layer removal structure; 6. Sweeping structure; 201. Protective outer shell; 202. Road saw motor; 203. Road saw assembly; 204. Protective inner shell; 205. Anti-splash brush; 206. Electric saw motor output shaft; 207. Electric saw assembly connecting shaft; 208. Moving shaft; 209. Fixed shaft; 210. Cracking telescopic cylinder; 302. Liquid pump; 303. Horizontal 304. Transfer pipe; 305. Liquid nozzle; 406. Reaction liquid storage tank; 407. Wiping telescopic cylinder; 408. Fixing plate; 409. Brush motor; 4000. Circular ground brush; 501. Layer-scraping telescopic motor; 502. Stabilizing thick plate; 503. Connecting column; 504. Layer-scraping steel shovel head; 505. Stabilizing slide rail; 506. Layer-scraping shell; 601. Sweeping motor; 602. Drive belt; 603. Sweeping brush; 604. Protective plate; 605. Drive belt fixing shaft. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 are within the scope of protection of the present invention.

[0029] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Reference Figure 1-2 As shown, the present invention provides an in-situ undisturbed regeneration device for aged asphalt pavement, including a vehicle body 1, and a road surface cracking structure 2, a reaction liquid spraying structure 3, and an asphalt wiping structure 4 arranged sequentially at the front end of the vehicle body 1.

[0031] The road surface cracking structure 2 is rotatably connected to the front end of the vehicle body 1, and the bottom end of the road surface cracking structure 2 is in contact with the ground; the reaction liquid spraying structure 3 is fixedly connected to the front end of the vehicle body 1, and the output end of the reaction liquid spraying structure 3 faces the road surface cracking structure 2; the asphalt wiping structure 4 is vertically slidably connected to the front end of the vehicle body.

[0032] In use, the road surface cracking structure 2 first cuts several shallow cracks into the road surface. The depth of the shallow cracks is the same as the depth of the aged road surface to be removed. The opening of the shallow cracks increases the reaction area of ​​the reaction liquid, allowing the reaction liquid to react with the asphalt road surface better and faster. The output end of the reaction liquid spraying structure 3 is directed towards the shallow cracks cut by the road surface cracking structure 2, and the reaction liquid is sprayed directly onto the shallow cracks and the asphalt road surface around the shallow cracks. While the vehicle body 1 moves forward slowly, the asphalt wiping structure 4 at the rear performs work on the road surface sprayed with the reaction liquid, wiping away the outermost layer of emulsified asphalt.

[0033] By setting up a road surface cracking structure 2, several shallow cracks can be created, effectively increasing the emulsification speed of the reactant on the asphalt pavement. Aging pavement surfaces are typically difficult to emulsify; the shallow cracks can disrupt the overall hard surface of the aging pavement, allowing the reactant to emulsify it more quickly. This reduces the resistance of the asphalt removal structure 4 in removing the aging pavement. Utilizing these structures, a undisturbed in-situ regeneration device for aging asphalt pavements is achieved, effectively removing the surface layer, reducing asphalt consumption, protecting the environment, and conserving resources.

[0034] Further optimizing the design, the road surface cracking structure 2 includes a protective shell 201, which is rotatably connected to the vehicle body 1. A chainsaw assembly connecting shaft 207 is rotatably connected to the inner side of the protective shell 201. Several road surface chainsaw assemblies 203 are fixedly connected to the chainsaw assembly connecting shaft 207 at equal intervals along its axial direction. A road surface chainsaw motor 202 is fixedly connected to the top of the protective shell 201. The output shaft 206 of the road surface chainsaw motor 202 is drively connected to the chainsaw assembly connecting shaft 207. The road surface chainsaw assemblies 203 directly cut the aged asphalt pavement, creating cracks of a certain depth. The selection of the model of the road surface chainsaw assemblies 203 is based on conventional technology and will not be elaborated upon here.

[0035] Further optimizing the scheme, the reaction liquid spraying structure 3 includes a reaction liquid storage cylinder 305, which is fixedly connected to the inside of the vehicle body 1. The bottom end of the reaction liquid storage cylinder 305 is fixedly connected to the input end of the liquid pump 302, and the output end of the liquid pump 302 is fixedly connected to the transverse transmission pipe 303. Several hoses are fixedly connected to the transverse transmission pipe 303 at equal intervals. The end of the hose away from the transverse transmission pipe 303 is fixedly connected to the liquid nozzle 304, which corresponds to the road electric saw assembly 203. The reaction liquid in the reaction liquid storage tank 305 is preferably an asphalt cleaning agent disclosed in CN104263565B, which includes the following components by mass percentage: 6-10 parts surfactant, 55-65 parts petroleum ether, 8-14 parts trichloroethylene, 4-8 parts isopropanol, 3-7 parts water, 3-7 parts diethylene glycol ethyl ether, and 3-7 parts triethanolamine, totaling 100 parts. The asphalt is emulsified by the physical properties of asphalt dissolving in organic solvents. The reaction liquid in the reaction liquid storage tank 305 is pumped into the transverse transmission pipe 303 by the liquid pump 302 and then sprayed out through the liquid nozzle 304.

[0036] The asphalt wiping structure 4 is further optimized by including a wiping telescopic cylinder 401. The top of the wiping telescopic cylinder 401 is fixedly connected to the vehicle body 1, and a fixing plate 402 is fixedly connected to the bottom of the wiping telescopic cylinder 401. The fixing plate 402 is longitudinally slidably connected to the vehicle body 1. A brush motor 403 is vertically fixedly connected to the inner side of the fixing plate 402. A circular ground brush 404 is fixedly connected to the output shaft of the brush motor 403. The circular ground brush 404 is set to contact the ground.

[0037] The asphalt removal structure 4 can not only remove the cut residue and fragments, but also spread the reaction liquid evenly and remove the surface asphalt that has been partially emulsified, so that the reaction liquid can effectively emulsify the asphalt under the emulsified asphalt, thereby improving the emulsification effect.

[0038] In a further optimized design, the protective outer shell 201 has a movable shaft 208 and a fixed shaft 209 at the end near the vehicle body 1. The fixed shaft 209 is rotatably connected to the vehicle body 1. A slit-telescopic cylinder 210 is rotatably connected to the movable shaft 208, and the end of the slit-telescopic cylinder 210 away from the movable shaft 208 is rotatably connected to the vehicle body 1. The raising and lowering of the protective outer shell 201 can be achieved by extending and retracting the slit-telescopic cylinder 210.

[0039] Further optimizing the design, the rear end of the vehicle body 1 is equipped with a peeling shell 506. Inside the peeling shell 506 are a peeling structure 5 and a sweeping structure 6. The peeling structure 5 and sweeping structure 6 are in contact with the ground, with the sweeping structure 6 located behind the peeling structure 5. The peeling structure 5 includes a peeling telescopic motor 501. The top of the telescopic motor 501 is fixedly connected to the inside of the peeling shell 506, and the bottom of the telescopic motor 501 is fixedly connected to a stabilizing plate 502. The stabilizing plate 502 and the peeling shell 506 are vertically slidably connected via a stabilizing slide rail 505. Several equally spaced connecting posts 503 are fixedly connected to the bottom of the stabilizing plate 502. A peeling steel shovel head 504 is detachably connected to the bottom of each connecting post 503 via bolts. The peeling steel shovel head 504 experiences significant wear and tear, therefore it is designed to be detachably connected. The material and model of the peeling steel shovel head 504 are selected using conventional techniques and will not be elaborated upon here.

[0040] Further optimizing the design, the sweeping structure 6 includes two symmetrically arranged tracked sweepers. Each tracked sweeper includes two drive belt fixing shafts 605 rotatably connected to the inner side of the outer shell 506. A drive belt 602 is sleeved between the two drive belt fixing shafts 605. Sweeping brushes 603 are fixedly connected at equal intervals to the outer side of the drive belt 602. One of the drive belt fixing shafts 605 is connected to a sweeping motor 601 via a belt. A protective plate 604 is fixedly connected between the two sweeping motors 601 and the two drive belts 602. The two drive belts 602 rotate in opposite directions, which can sweep away the stripped asphalt residue and emulsified asphalt clumps.

[0041] In a further optimized design, a protective inner shell 204 is fixedly connected to the top of the road chainsaw assembly 203, and an anti-splash brush 205 is fixedly connected to the bottom edge of the protective outer shell 201 along its perimeter. The anti-splash brush 205 and the protective inner shell 204 can protect the inside of the device, protect it from external impacts by gravel, and reduce noise.

[0042] The method of using the undisturbed in-situ recycling device for aged asphalt pavement includes:

[0043] S1. Investigate the aging of the road surface and determine the sections that need to be repaired;

[0044] S2. Clean the road surface;

[0045] S3. Use an in-situ undisturbed recycling device to create cracks in the road surface, spray a reaction liquid, and wipe away the emulsified aged asphalt pavement.

[0046] S4. Lay a new thin layer of asphalt on the asphalt pavement after the surface layer has been removed.

[0047] S5. Pave and maintain the new asphalt pavement.

[0048] This method of maintaining asphalt pavement and repairing aging asphalt pavement effectively reduces waste generation and asphalt usage. Furthermore, the thinner asphalt layer hardens more easily, requiring less maintenance time and allowing for faster commissioning.

[0049] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "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, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0050] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. An in-situ undisturbed regeneration device for aged asphalt pavement, characterized in that, Includes a vehicle body (1), and the front end of the vehicle body (1) is provided with a road surface cracking structure (2), a reaction liquid spraying structure (3), and an asphalt wiping structure (4) in a front-to-back sequence; The road surface cracking structure (2) is rotatably connected to the front end of the vehicle body (1), and the bottom end of the road surface cracking structure (2) is in contact with the ground; the reaction liquid spraying structure (3) is fixedly connected to the front end of the vehicle body (1), and the output end of the reaction liquid spraying structure (3) faces the road surface cracking structure (2); the asphalt wiping structure (4) is vertically slidably connected to the front end of the vehicle body (1); The road surface cracking structure (2) includes a protective shell (201), which is rotatably connected to the vehicle body (1). A chainsaw assembly connecting shaft (207) is rotatably connected to the inner side of the protective shell (201). A number of road chainsaw assemblies (203) are fixedly connected to the chainsaw assembly connecting shaft (207) at equal intervals along its axial direction. A road chainsaw motor (202) is fixedly connected to the top of the protective shell (201). The chainsaw motor output shaft (206) of the road chainsaw motor (202) is connected to the chainsaw assembly connecting shaft (207) for transmission.

2. The undisturbed in-situ regeneration device for aged asphalt pavement according to claim 1, characterized in that, The reaction liquid spraying structure (3) includes a reaction liquid storage cylinder (305), which is fixedly connected to the inside of the vehicle body (1). The bottom end of the reaction liquid storage cylinder (305) is fixedly connected to the input end of a liquid pump (302), and the output end of the liquid pump (302) is fixedly connected to a transverse transmission pipe (303). The transverse transmission pipe (303) is fixedly connected to several hoses at equal intervals. The end of the hose away from the transverse transmission pipe (303) is fixedly connected to a liquid nozzle (304), and the liquid nozzle (304) corresponds to the road electric saw assembly (203).

3. The undisturbed in-situ regeneration device for aged asphalt pavement according to claim 1, characterized in that, The asphalt wiping structure (4) includes a wiping telescopic cylinder (401), the top of which is fixedly connected to the vehicle body (1), and a fixing plate (402) is fixedly connected to the bottom of which is longitudinally slidably connected to the vehicle body (1). A brush motor (403) is vertically fixedly connected to the inner side of the fixing plate (402), and a circular ground brush (404) is fixedly connected to the output shaft of the brush motor (403). The circular ground brush (404) is in contact with the ground.

4. The undisturbed in-situ regeneration device for aged asphalt pavement according to claim 1, characterized in that, The protective shell (201) is provided with a movable shaft (208) and a fixed shaft (209) at one end near the vehicle body (1). The fixed shaft (209) is rotatably connected to the vehicle body (1). A slotted telescopic cylinder (210) is rotatably connected on the movable shaft (208). The end of the slotted telescopic cylinder (210) away from the movable shaft (208) is rotatably connected to the vehicle body (1).

5. The undisturbed in-situ regeneration device for aged asphalt pavement according to claim 1, characterized in that, The rear end of the vehicle body (1) is provided with a peeling shell (506). The peeling shell (506) is provided with a peeling structure (5) and a sweeping structure (6) on the inner side. The peeling structure (5) and the sweeping structure (6) are in contact with the ground. The sweeping structure (6) is located behind the peeling structure (5). The peeling structure (5) includes a peeling telescopic motor (501). The top of the peeling telescopic motor (501) is fixedly connected to the inner side of the peeling shell (506). The bottom end of the peeling telescopic motor (501) is fixedly connected to a stabilizing thick plate (502). The stabilizing thick plate (502) and the peeling shell (506) are vertically slidably connected through a stabilizing slide rail (505). The bottom end of the stabilizing thick plate (502) is fixedly connected to a number of equally spaced connecting columns (503). The bottom end of the connecting column (503) is detachably connected to a peeling steel shovel head (504) by bolts.

6. The undisturbed in-situ regeneration device for aged asphalt pavement according to claim 5, characterized in that, The sweeping structure (6) includes two symmetrically arranged tracked sweepers. Each tracked sweeper includes two drive belt fixing shafts (605) rotatably connected to the inner side of the outer shell (506) of the cover. A drive belt (602) is sleeved between the two drive belt fixing shafts (605). Sweeping brushes (603) are fixedly connected at equal intervals on the outer side of the drive belt (602). One of the drive belt fixing shafts (605) is connected to the sweeping motor (601) via a belt. A protective plate (604) is fixedly connected between the two sweeping motors (601) and the two drive belts (602).

7. The undisturbed in-situ regeneration device for aged asphalt pavement according to claim 1, characterized in that, The top of the road saw assembly (203) is fixedly connected to a protective inner shell (204), and the bottom of the protective outer shell (201) is fixedly connected to an anti-splash brush (205).

8. The method of using the undisturbed in-situ recycling device for aged asphalt pavement according to any one of claims 1-7, comprising: S1. Investigate the aging of the road surface and determine the sections that need to be repaired; S2. Clean the road surface; S3. Use an in-situ undisturbed recycling device to create cracks in the road surface, spray a reaction liquid, and wipe away the emulsified aged asphalt pavement. S4. Lay a new thin layer of asphalt on the asphalt pavement after the surface layer has been removed. S5. Pave and maintain the new asphalt pavement.

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