A distributed fiber-reinforced asphalt pavement laying device

Abstract

This utility model discloses a distributed fiber-reinforced asphalt pavement laying device, comprising: a vehicle body and a hopper, a fiber web providing mechanism, an oil spraying mechanism, and a cutting mechanism mounted on the vehicle body. The hopper includes a first storage bin and a second storage bin. The first storage bin is connected to a first conveying pipe for conveying materials, and the second storage bin is connected to a second conveying pipe for conveying materials. The fiber web providing mechanism provides the fiber web, the oil spraying mechanism applies liquid asphalt to the fiber web, and the cutting mechanism cuts the fiber web. In this distributed fiber-reinforced asphalt pavement laying device, the oil spraying mechanism applies liquid asphalt to the fiber web, which can adjust the asphalt-aggregate ratio and simultaneously form an oil film, reducing adhesion to asphalt, increasing the smoothness of the compaction process, and reducing the difficulty of compaction. The fiber web is an integral structure, preventing fiber clumping and dispersion, and eliminating the problem of difficult mixing and compaction of fiber-added asphalt mixtures, thus improving the crack resistance of the asphalt pavement.

Description

Technical Field

[0001] This utility model relates to the field of road engineering technology, specifically to a distributed fiber-reinforced asphalt pavement laying device. Background Technology

[0002] In cold regions, asphalt pavements are highly susceptible to cracking due to prolonged exposure to low temperatures and drastic temperature changes. The core mechanism is that the asphalt mixture shrinks and deforms at low temperatures, and the tensile stress generated by the constraint of the base layer exceeds the tensile strength of the material itself, leading to pavement fracture. This cracking often manifests as transverse cracks, block cracks, etc. Repeated freeze-thaw cycles exacerbate crack propagation, accompanied by problems such as base layer frost heave and material aging, severely impacting the structural integrity and service life of the pavement.

[0003] Adding fibers to asphalt pavements in cold regions can significantly enhance the crack resistance of the pavement structure. After being uniformly dispersed in the asphalt mixture, the fibers form a three-dimensional network system, effectively binding the aggregate and significantly improving the tensile strength and toughness of the mixture, directly resisting low-temperature shrinkage stress. Simultaneously, the fibers have a strong adsorption effect on asphalt, increasing the proportion of structural asphalt and reducing free asphalt, thereby significantly improving the viscosity and toughness of the asphalt mastic, delaying aging, and allowing the mixture to maintain good stress relaxation ability at low temperatures, avoiding excessive stress concentration. Furthermore, the toughening and crack-resistant effect of the fibers can inhibit the generation and propagation of microcracks, and by sharing and transferring stress, it makes the material shrink more uniform, thus effectively reducing the generation and development of thermal shrinkage cracks and comprehensively improving the durability of the pavement.

[0004] However, with existing asphalt pavement laying equipment, the fiber-added asphalt mixture is difficult to mix and compact during the laying of fiber-added asphalt pavement, and the added fibers are prone to clumping and are not easy to disperse, resulting in poor crack resistance of the asphalt pavement. Utility Model Content

[0005] Therefore, it is necessary to provide a distributed fiber-reinforced asphalt pavement laying device to address the problems that fiber-added asphalt mixtures are difficult to mix and compact, and that the added fibers are prone to clumping and difficult to disperse, resulting in poor crack resistance of asphalt pavements.

[0006] A distributed fiber-reinforced asphalt pavement laying device includes: a vehicle body and a hopper, a fiber web supply mechanism, an oil spraying mechanism, and a cutting mechanism disposed on the vehicle body; The silo includes a first storage silo and a second storage silo. The first storage silo is connected to a first conveying pipe for conveying materials, and the second storage silo is connected to a second conveying pipe for conveying materials. The fiber web providing mechanism is used to provide the fiber web, the oil spraying mechanism is used to apply liquid asphalt to the fiber web, and the cutting mechanism is used to cut the fiber web; The discharge ports of the first conveying pipe, the fiber web, and the second conveying pipe are arranged sequentially along the travel direction of the vehicle body, so that the fiber web is located between the first asphalt mixture provided by the first conveying pipe and the second asphalt mixture provided by the second conveying pipe.

[0007] The aforementioned distributed fiber-reinforced asphalt pavement laying device involves the following steps: First asphalt mixture stored in the first storage bin is conveyed to the pavement through the outlet of the first conveying pipe. Then, a fiber mesh provided by a fiber mesh supply mechanism, after being coated with liquid asphalt by an oil spraying mechanism, is laid on the first asphalt mixture through its outlet. Finally, second asphalt mixture stored in the second storage bin is conveyed to the fiber mesh through the outlet of the second conveying pipe. After compaction, a fiber-reinforced asphalt pavement is formed. The oil spraying mechanism applies liquid asphalt to the fiber mesh, adjusting the asphalt-aggregate ratio and forming an oil film, reducing adhesion to the asphalt, increasing the smoothness of the compaction process, and reducing compaction difficulty. The fiber mesh is an integral structure, preventing fiber clumping and ensuring proper dispersion. It also eliminates the problem of difficult mixing and compaction of fiber-reinforced asphalt mixtures, thus improving the crack resistance of the asphalt pavement.

[0008] In one embodiment, the fiber web providing mechanism includes a material rack, a drive roller, and a conveying roller mounted on the vehicle body. The material rack is rotatably equipped with a material roller for winding the fiber web. The drive roller receives the fiber web and conveys the fiber web to the conveying roller, which guides the fiber web to the fiber web outlet.

[0009] In one embodiment, the vehicle body is provided with a carrying platform, the hopper and the material rack are mounted on the carrying platform, the first conveying pipe, the second conveying pipe, the drive roller and the conveying roller are located inside the carrying platform, and the outlet of the first conveying pipe, the fiber web and the second conveying pipe is located at the rear of the vehicle body.

[0010] In one embodiment, the oil spraying mechanism includes an oil storage tank, an oil outlet pipe, and an oil coating roller. The oil storage tank is installed on the vehicle body, and the oil outlet pipe connects the oil storage tank and the oil coating roller. Liquid asphalt in the oil storage tank enters the inner cavity of the oil coating roller through the oil outlet pipe. The side wall of the oil coating roller is provided with an oiling port that communicates with the inner cavity of the oil coating roller.

[0011] In one embodiment, the oiling nozzle of the oiling roller is equipped with an applicator block, which extends out of the oiling roller and abuts against the fiber web.

[0012] In one embodiment, the cutting mechanism includes a base plate, a mounting frame, a telescopic member, and a cutter. The base plate is mounted on the vehicle body, the mounting frame is mounted on the base plate, the fiber web passes through the base plate, the telescopic member is mounted on the mounting frame, the cutter is connected to the telescopic member, and the telescopic member drives the cutter to move up and down to cut the fiber web on the base plate.

[0013] In one embodiment, the mounting bracket is provided with a guide post, and the end of the cutter is slidably sleeved on the guide post.

[0014] In one embodiment, an elastic element is sleeved on the guide post, and the elastic element is located between the cutter and the base plate.

[0015] In one embodiment, the elastic element is a return spring, and the telescopic element is a hydraulic cylinder.

[0016] In one embodiment, the rear of the vehicle body is equipped with a compaction mechanism for compacting the road surface formed by the layering of the first asphalt mixture, the fiber mesh, and the second asphalt mixture. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 This is a schematic diagram of a distributed fiber-reinforced asphalt pavement laying device in one embodiment. Figure 2 for Figure 1 A partial cross-sectional view of the distributed fiber-reinforced asphalt pavement laying device shown. Figure 3 for Figure 2 Cross-sectional view of the intermediate coating roller; Figure 4 A schematic diagram of the cutting mechanism.

[0019] Figure label: 10-Car body, 11-Bearing platform, 21-First storage compartment, 22-Second storage compartment, 23-First conveying pipe, 24-Second conveying pipe, 30-Fiber web providing mechanism, 31-Material rack, 32-Drive roller, 33-Conveying roller, 34-Material roller, 40-Oil spraying mechanism, 41-Oil storage tank, 42-Oil outlet pipe, 43-Oil coating roller, 431-Inner cavity, 432-Oil coating port, 44-Oil coating block, 50-Cutting mechanism, 51-Base plate, 52-Mounting frame, 521-Column, 522-Crossbeam, 53-Telescopic component, 54-Cutter, 55-Guide column, 56-Elastic component, 60-Compacting mechanism, 61-Frame, 62-Pressure roller. Detailed Implementation

[0020] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0023] Please see Figure 1 and Figure 2 One embodiment of the distributed fiber-reinforced asphalt pavement laying device includes a vehicle body 10, a hopper, a fiber web providing mechanism 30, an oil spraying mechanism 40, and a cutting mechanism 50.

[0024] The vehicle body 10 is used to carry other components of the asphalt pavement laying device, and the vehicle body 10 can travel along the road surface to complete the spreading of asphalt mixture and fiber mesh. The hopper is installed on the vehicle body 10 and includes a first storage bin 21 and a second storage bin 22. The first storage bin 21 stores the first asphalt mixture, and the second storage bin 22 stores the second asphalt mixture.

[0025] The first asphalt mixture and the second asphalt mixture can be the same or different, depending on actual needs. The first storage bin 21 is connected to a first conveying pipe 23, which is used to convey the first asphalt mixture out of the first storage bin 21. The second storage bin 22 is connected to a second conveying pipe 24, which is used to convey the second asphalt mixture out of the second storage bin 22.

[0026] In one embodiment, a support platform 11 is provided on the vehicle body 10. A first storage compartment 21 and a second storage compartment 22 are disposed on the support platform 11. A first conveying pipe 23 and a second conveying pipe 24 pass through the support platform 11 and extend to the rear of the vehicle body 10. The support platform 11 can support the first storage compartment 21 and the second storage compartment 22, and also spatially separates the storage compartments and the conveying pipes, which facilitates the layout of the conveying pipes and the subsequent fiber web supply mechanism 30.

[0027] A fiber mesh supply mechanism 30, an oil spraying mechanism 40, and a cutting mechanism 50 are mounted on the vehicle body 10. The fiber mesh supply mechanism 30 is used to supply fiber mesh, the oil spraying mechanism 40 is used to apply liquid asphalt to the fiber mesh, and the cutting mechanism 50 is used to cut the fiber mesh. The outlets of the first conveying pipe 23, the fiber mesh, and the second conveying pipe 24 are arranged sequentially along the travel direction of the vehicle body 10, so that the fiber mesh is located between the first asphalt mixture provided by the first conveying pipe 23 and the second asphalt mixture provided by the second conveying pipe 24.

[0028] In other words, the outlets of the first conveying pipe 23, the fiber mesh, and the second conveying pipe 24 are arranged in sequence. During the movement of the vehicle body 10, the first asphalt mixture conveyed by the first conveying pipe 23 is first laid on the road surface, then the fiber mesh is laid on the first asphalt mixture, and finally the second asphalt mixture is laid on the fiber mesh.

[0029] In one embodiment, the fiber web providing mechanism 30 includes a material rack 31, a drive roller 32, and a conveying roller 33, all mounted on the vehicle body 10. Specifically, the material rack 31 is mounted on a support platform 11, and the drive roller 32 and conveying roller 33 are mounted inside the support platform 11. A material roller 34 for winding the fiber web is rotatably mounted on the material rack 31. The fiber web is wound around the material roller 34, and by rotating the material roller 34, the fiber web is released. The fiber web passes through the top surface of the support platform 11 and enters the support platform 11. The drive roller 32 receives the fiber web and conveys it to the conveying roller 33, which guides the fiber web to the rear of the vehicle body 10. Then, the fiber web is discharged from the fiber web outlet.

[0030] In one embodiment, the conveying rollers 33 are designed in pairs, with multiple pairs spaced apart along the conveying path of the fiber web. The paired conveying rollers 33 clamp the conveyed fiber web, ensuring the stability and speed of the conveying path. The drive roller 32 and the conveying rollers 33 can be connected to a power source, such as a rotary motor, to drive the fiber web under active rotational power.

[0031] Please refer to the following: Figure 3 In one embodiment, the oil spraying mechanism 40 includes an oil reservoir 41, an oil outlet pipe 42, and an oil coating roller 43. The oil reservoir 41 is mounted on the vehicle body 10. Specifically, the oil reservoir 41 is mounted on the support platform 11, one end of the oil outlet pipe 42 is connected to the oil reservoir 41, and the other end of the oil outlet pipe 42 passes through the top surface of the support platform 11 and is connected to the oil coating roller 43 inside the support platform 11. The side wall of the oil coating roller 43 is provided with an oiling port 432 that communicates with the inner cavity 431 of the oil coating roller 43.

[0032] The liquid asphalt stored in the oil storage tank 41 is transported to the inner cavity 431 of the oiling roller 43 through the oil outlet pipe 42. The oiling roller 43 is fixed. When the fiber web passes through the oiling roller 43, the liquid asphalt fine coating port 432 in the inner cavity 431 of the oiling roller 43 applies the liquid asphalt to the fiber web. This can adjust the oil-aggregate ratio and form an oil film, reducing adhesion to asphalt, increasing the smoothness of the compaction process, and reducing the difficulty of compaction.

[0033] In one embodiment, an application block 44 is installed on the application port 432 of the application roller 43. The application block 44 extends out and abuts against the fiber web outside the application roller 43. The application block 44 has an array of through holes to allow liquid petroleum to flow out from the holes and be applied to the fiber web, and the array of through holes ensures uniform application of the liquid petroleum. The application roller 43 is arranged opposite to the drive roller 32, and the application roller 43 and the drive roller 32 clamp and convey the fiber web. On the one hand, this can stabilize the fiber web conveying process, and on the other hand, it can ensure close contact between the fiber web and the application roller 43, ensuring the effectiveness of liquid asphalt application.

[0034] Please refer to the following: Figure 4 In one embodiment, the cutting mechanism 50 is located between the conveying roller 33 and the fiber web outlet. After the fiber web is laid, the cutting mechanism 50 can cut the fiber web. Specifically, the cutting mechanism 50 includes a base plate 51, a mounting frame 52, a telescopic member 53, and a cutter 54. The base plate 51 is mounted on the vehicle body 10, the mounting frame 52 is mounted on the base plate 51, and the fiber web passes over the base plate 51. The telescopic member 53 is mounted on the mounting frame 52, and the cutter 54 is connected to the telescopic member 53. The telescopic member 53 drives the cutter 54 to rise and fall to cut the fiber web on the base plate 51.

[0035] In one embodiment, the mounting frame 52 is U-shaped and includes two uprights 521 and a crossbeam 522. The two uprights 521 are spaced apart, and a fiber mesh passes between them. The crossbeam 522 connects the tops of the two uprights 521, and a telescopic member 53 is mounted on the crossbeam 522. In one embodiment, the telescopic member 53 can be a hydraulic cylinder. It is understood that in other embodiments, the telescopic member 53 can also be a pneumatic cylinder or an electric telescopic rod, etc.

[0036] In one embodiment, the mounting bracket 52 is provided with guide posts 55, and the end of the cutter 54 is slidably sleeved on the guide post 55. The guide post 55 can guide the movement of the cutter 54 and ensure the stability of the movement of the cutter 54. Specifically, the guide post 55 is mounted on the uprights 521 of the mounting bracket 52, and both uprights 521 are provided with guide posts 55. Both ends of the cutter 54 are sleeved on the guide posts 55.

[0037] Furthermore, an elastic element 56 is sleeved on the guide post 55, and the elastic element 56 is located between the cutter 54 and the base plate 51. During the downward movement of the cutter 54 to cut the fiber web, the elastic element 56 is compressed. After the cutter 54 completes the cutting, the elastic element 56 extends to assist the cutter 54 in returning to its original position. Specifically, the elastic element 56 is a return spring.

[0038] Please refer to it again. Figure 1 In one embodiment, a compaction mechanism 60 is installed at the rear of the vehicle body 10. The compaction mechanism 60 is used to compact the road surface layered with a first asphalt mixture, a fiber mesh, and a second asphalt mixture. Specifically, the compaction mechanism 60 includes a frame 61 and pressure rollers 62. The frame 61 is hinged to the rear of the vehicle body 10, and the pressure rollers 62 are mounted on the frame 61. Two pressure rollers 62 are provided and arranged along the front and rear of the frame 61 to achieve two-stage compaction of the road surface.

[0039] In the aforementioned distributed fiber-reinforced asphalt pavement paving device, the first asphalt mixture in the first storage bin 21 is conveyed to the outlet through the first conveying pipe 23 and laid onto the road surface. The fiber mesh on the material roller 34 is conveyed to the outlet through the drive roller 32 and the conveying roller 33, and liquid asphalt is applied during the conveying process before it is laid onto the first asphalt mixture. The second asphalt mixture in the second storage bin 22 is conveyed to the outlet through the second conveying pipe 24 and laid onto the fiber mesh. During the movement of the vehicle body 10, two pressure rollers 62 compact the road surface layered with the first asphalt mixture, fiber mesh, and second asphalt mixture. After the road surface is laid, the first conveying pipe 23 and the second conveying pipe 24 stop conveying materials, and the cutting mechanism 50 cuts the fiber mesh.

[0040] The aforementioned distributed fiber-reinforced asphalt pavement laying device uses an oil spraying mechanism 40 to apply liquid asphalt onto the fiber mesh. This allows for adjustment of the asphalt-aggregate ratio and the formation of an oil film, reducing adhesion to the asphalt, increasing the smoothness of the compaction process, and reducing compaction difficulty. The fiber mesh is an integral structure, preventing fiber clumping and ensuring proper dispersion. It also eliminates the problem of fiber-reinforced asphalt mixtures being difficult to mix and compact, thus improving the crack resistance of the asphalt pavement.

[0041] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A distributed fiber reinforced asphalt pavement laying device, characterized by, include: The vehicle body and the hopper, fiber web supply mechanism, oil spraying mechanism and cutting mechanism provided on the vehicle body; The silo includes a first storage silo and a second storage silo. The first storage silo is connected to a first conveying pipe for conveying materials, and the second storage silo is connected to a second conveying pipe for conveying materials. The fiber web providing mechanism is used to provide the fiber web, the oil spraying mechanism is used to apply liquid asphalt to the fiber web, and the cutting mechanism is used to cut the fiber web; The discharge ports of the first conveying pipe, the fiber web, and the second conveying pipe are arranged sequentially along the travel direction of the vehicle body, so that the fiber web is located between the first asphalt mixture provided by the first conveying pipe and the second asphalt mixture provided by the second conveying pipe.

2. The distributed fiber reinforced asphalt paving apparatus of claim 1, wherein, The fiber web providing mechanism includes a material rack, a drive roller, and a conveying roller mounted on the vehicle body. The material rack is rotatably equipped with a material roller for winding the fiber web. The drive roller receives the fiber web and conveys it to the conveying roller. The conveying roller is used to guide the fiber web to the fiber web outlet.

3. The distributed fiber reinforced asphalt paving apparatus of claim 2, wherein, The vehicle body is provided with a carrying platform, the hopper and the material rack are mounted on the carrying platform, the first conveying pipe, the second conveying pipe, the drive roller and the conveying roller are located inside the carrying platform, and the outlet of the first conveying pipe, the fiber web and the second conveying pipe is located at the rear of the vehicle body.

4. The distributed fiber reinforced asphalt paving apparatus of claim 1, wherein, The oil spraying mechanism includes an oil storage tank, an oil outlet pipe, and an oil coating roller. The oil storage tank is installed on the vehicle body. The oil outlet pipe connects the oil storage tank and the oil coating roller. Liquid asphalt in the oil storage tank enters the inner cavity of the oil coating roller through the oil outlet pipe. The side wall of the oil coating roller is provided with an oiling port that communicates with the inner cavity of the oil coating roller.

5. The distributed fiber reinforced asphalt paving apparatus of claim 4, wherein, The oiling nozzle of the oiling roller is equipped with an applicator block, which extends out of the oiling roller and abuts against the fiber web.

6. The distributed fiber reinforced asphalt paving apparatus of claim 1, wherein, The cutting mechanism includes a base plate, a mounting frame, a telescopic component, and a cutter. The base plate is mounted on the vehicle body, the mounting frame is mounted on the base plate, the fiber web passes through the base plate, the telescopic component is mounted on the mounting frame, the cutter is connected to the telescopic component, and the telescopic component drives the cutter to move up and down to cut the fiber web on the base plate.

7. The distributed fiber reinforced asphalt paving apparatus of claim 6, wherein, The mounting bracket is provided with guide posts, and the end of the cutter is slidably sleeved on the guide posts.

8. The distributed fiber reinforced asphalt paving apparatus of claim 7, wherein, An elastic element is sleeved on the guide post, and the elastic element is located between the cutter and the base plate.

9. The distributed fiber reinforced asphalt paving apparatus of claim 8, wherein, The elastic element is a return spring, and the telescopic element is a hydraulic cylinder.

10. The distributed fiber reinforced asphalt paving apparatus of claim 1, wherein, The rear of the vehicle body is equipped with a compaction mechanism for compacting the road surface formed by the layering of the first asphalt mixture, the fiber mesh, and the second asphalt mixture.

Images