High-solid-content emulsified asphalt fully-recycled asphalt mixture paver

Abstract

The invention belongs to the field of highway equipment, and particularly relates to a high-solid-content emulsified asphalt fully-recycled asphalt mixture paver. Comprising a rack and a scraper conveyor rotationally arranged on the rack, the scraper conveyor comprises a left conveyor and a right conveyor which are arranged left and right, the rack is further provided with a protection cover, the protection cover is arranged between the left conveyor and the right conveyor, one end of the rack is further provided with a main rack, and the other end of the main rack is provided with a baffle. According to the material conveying system of the paver, the structure of an existing material conveying system of the paver is improved, by means of the arrangement of the material distribution pipes and the auxiliary material distribution pipes, a mixture is layered, then water is sprayed into the mixture, the material conveying system of the paver has the advantages that the material conveying system of the paver is more stable, and the material conveying efficiency is improved. And then the materials are mixed through the subsequent spiral distributor, so that the supplemented water can be dispersed into the mixture, the water content of the mixture is effectively and uniformly improved, and the paving quality is ensured.

Description

Technical Field

[0001] This invention belongs to the field of highway equipment, and in particular relates to a high-solids-content emulsified asphalt fully recycled asphalt mixture paver. Background Technology

[0002] High-solids-content emulsified asphalt fully recycled asphalt is a deep cold recycling pavement technology that uses high-solids-content emulsified asphalt as the core recycled binder. It involves cold mixing, on-site paving and compaction of old asphalt pavement milled material (RAP). The entire process does not require heating of the mixture, and it relies on the adhesion and stability of high-solids-content emulsified asphalt to achieve 100% recycling of old materials. It is one of the mainstream processes in the field of asphalt pavement recycling.

[0003] In high-solids-content emulsified asphalt fully recycled asphalt mixtures, the moisture comes from the aqueous phase of the emulsified asphalt and added water. The role of moisture is to ensure the workability of the emulsified asphalt before it breaks down, making it easy to pave. However, too much moisture will delay breaking down and strength development, while too little moisture will cause the emulsified asphalt to break down prematurely, resulting in a hardened and loose mixture. The optimal moisture content is generally controlled between 3% and 5% (adjusted according to the moisture content of the recycled material and the ambient temperature). The criterion for judgment is: the mixture can be formed into a clump when squeezed in the hand, but it will easily break apart when dropped and lightly touched, with no obvious free water on the surface.

[0004] Existing road paving mainly relies on pavers. During paving, material is fed into the paver's hopper by a material truck. The mixture is then conveyed from the hopper to the distribution trough behind the main machine via a scraper conveyor at the bottom of the hopper. The auger distributor then evenly distributes the mixture along the paving width. However, during transportation, the moisture content of the mixture may decrease due to weather and other factors, leading to roughening. Adding water to the hopper or distribution trough makes it difficult to ensure uniform moisture distribution, while excessive water in some areas delays demulsification and strength development. Therefore, how to replenish a certain amount of moisture during the paving process is a problem that needs to be solved. Summary of the Invention

[0005] This invention addresses the technical problems existing in the paving of high-solids-content emulsified asphalt and fully recycled asphalt mixtures by proposing a high-solids-content emulsified asphalt and fully recycled asphalt mixture paver that is reasonably designed, simple in structure, easy to process, and can effectively improve the moisture content.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: The present invention provides a high-solids-content emulsified asphalt fully recycled asphalt mixture paver, comprising a frame and a scraper conveyor rotatably mounted on the frame. The scraper conveyor includes a left-side conveyor and a right-side conveyor arranged lateral to the left and right sides. A protective cover is also provided on the frame, and the protective cover is located between the left-side and right-side conveyors. A main frame is also provided at one end of the frame. A distribution pipe is provided on the frame, and the distribution pipe is located on both sides of the frame. An auxiliary distribution pipe is provided on the protective cover. The distribution pipe and the auxiliary distribution pipe are located below the main frame and are spaced apart along the moving direction of the scraper conveyor. The distribution pipe and the auxiliary distribution pipe are located above the scraper conveyor. Both the distribution pipe and the auxiliary distribution pipe are triangular prisms with one corner facing the moving direction of the mixture. An atomizing nozzle is provided on the side of the distribution pipe and the auxiliary distribution pipe away from the moving direction of the mixture.

[0007] Preferably, the material distribution pipes are arranged downwards at intervals along the moving direction of the scraper conveyor.

[0008] Preferably, a material distribution cone is provided at the bottom of the main frame, which is positioned above the left and right conveyors. The material distribution cone is triangular in shape with one of its edges facing the direction of material movement.

[0009] Preferably, the bottom of the main frame is also provided with a connecting column, and the connecting column and the distributing cone are spaced apart front and back. A rotating shaft is provided between the side of the distributing cone away from the direction of movement of the mixture and the connecting column. A guide plate is provided on the side plate of the rotating shaft. The guide plate is evenly distributed in a ring on the rotating shaft. The rotating shaft is rotatably disposed between the distributing cone and the connecting column.

[0010] Preferably, the connecting column is spaced apart from the left and right conveyors.

[0011] Compared with the prior art, the advantages and positive effects of the present invention are as follows: This invention provides a high-solids-content emulsified asphalt fully recycled asphalt paver. By improving the structure of the existing paver's material conveying system, and utilizing the setting of a distribution pipe and an auxiliary distribution pipe, the mixture is layered, allowing water to be sprayed into the interior of the mixture. Then, it is mixed by a subsequent auger distributor, so that the added water can be dispersed throughout the mixture, thereby effectively and uniformly increasing the moisture content of the mixture and ensuring paving quality. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of the high-solids-content emulsified asphalt and fully recycled asphalt mixture paver provided in Example 1; Figure 2 This is a rear view of the high-solids-content emulsified asphalt and fully recycled asphalt mixture paver provided in Example 1; Figure 3 This is a structural schematic diagram of the rack portion provided in Example 1; Figure 4 This is a schematic diagram of the structure at the bottom of the mainframe provided in Example 1; In the above figures, 1. Frame; 11. Left conveyor; 12. Right conveyor; 13. Holding cover; 14. Distributor pipe; 15. Auxiliary distributor pipe; 16. Atomizing nozzle; 2. Main frame; 21. Distributor cone; 22. Connecting column; 23. Rotating shaft; 24. Guide plate. Detailed Implementation

[0014] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0015] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0016] Example 1, as Figures 1-4 As shown, this embodiment aims to solve the problem that high solids content emulsified asphalt fully recycled asphalt mixtures cannot effectively replenish moisture content when insufficient moisture is present during paving (especially in summer when temperatures are high).

[0017] Considering that the only area where moisture can be replenished on the entire paver is the conveying stage, and that existing pavers include a frame 1 and a scraper conveyor rotatably mounted on the frame 1, with a left-side conveyor 11 and a right-side conveyor 12 positioned to the left and right respectively, the frame 1 is also equipped with a protective cover 13. The protective cover 13 primarily protects the chain in the middle of the left-side conveyor 11 and right-side conveyor 12, while ensuring the mixture moves towards the left-side and right-side conveyors 11 and 12. Therefore, the protective cover 13 is positioned between the left-side and right-side conveyors 11 and 12. The protective cover 13 is shaped like a triangular prism, with one corner facing outwards. Of course, in this embodiment, the corner of the triangular prism is rounded, mainly because the aggregate will also rub against the edges. A main frame 2 is also provided at one end of the frame 1; thus, the part of the frame 1 without the main frame 2 is the hopper area. This structure is common in existing pavers, and therefore, it will not be described in detail in this embodiment.

[0018] Considering that the main problem with effectively replenishing moisture at the hopper and auger distributor is the inability to disperse the moisture, leading to excessive localized moisture and affecting paving quality, this embodiment includes a distribution pipe 14 on the frame 1, located on both sides of the frame 1, and an auxiliary distribution pipe 15 on the protective cover 13. Both the distribution pipe 14 and the auxiliary distribution pipe 15 are positioned below the main frame 2. Since the mixture at the hopper is in a stacked state, the distribution pipe 14 and the auxiliary distribution pipe 15 have no function there; therefore, they are both positioned below the main frame 2. Furthermore, the distribution pipe 14 and the auxiliary distribution pipe 15 are spaced apart along the direction of movement of the scraper conveyor. Currently, the length of the main frame 2 of existing pavers is approximately 2 meters, so four are sufficient. The distribution pipe 14 and the auxiliary distribution pipe 15 are positioned above the scraper conveyor, specifically above the left conveyor 11 and the right conveyor 12 on either side.

[0019] To facilitate material distribution, in this embodiment, both the distribution pipe 14 and the auxiliary distribution pipe 15 are arranged in a triangular prism shape with one corner facing the direction of material movement. That is, the portion of the distribution pipe 14 and the auxiliary distribution pipe 15 facing the hopper has one corner. Thus, when the mixture is conveyed, it can be divided into upper and lower layers as it passes through the distribution pipe 14 and the auxiliary distribution pipe 15. Atomizing nozzles 16 are provided on the side of the distribution pipe 14 and the auxiliary distribution pipe 15 away from the direction of material movement. Because of the layering of the mixture, the atomizing nozzles 16 have a spraying space, which is located inside the mixture. Therefore, after spraying, and then mixing through the spiral distributor, the moisture distribution is more uniform compared to spraying water on the surface and then mixing through the spiral distributor.

[0020] To further improve the uniformity of moisture distribution, in this embodiment, the distribution pipes 14 are spaced downwards along the moving direction of the scraper conveyor. This ensures that the layers are at different locations, further ensuring uniform moisture distribution. The downward spacing is to reduce obstruction. Since the mixture is more abundant when it first enters the lower part, the obstruction is greater. Therefore, the uppermost distribution pipe 14 can easily distribute the material. As the mixture becomes looser thereafter, the distribution pipes 14 are spaced downwards along the moving direction of the scraper conveyor.

[0021] Considering that even the distribution pipe 14 on the side of the frame 1 can only make half of the mixture uniform, in order to make the mixture on the side of the protective cover 13 uniform as well, in this embodiment, a distribution cone 21 is provided at the bottom of the main frame 2. The distribution cone 21 is located above the left conveyor 11 and the right conveyor 12. The distribution cone 21 is triangular prism shaped with one edge facing the direction of mixture movement. In this embodiment, although the distribution cone 21 is located near the hopper, there is still a certain distance. This is because the main frame 2 itself has the function of obstructing materials. If the distribution cone 21 is located close to the end, it will affect the amount of mixture entering the scraper conveyor. Thus, after passing through the distribution cone 21, the mixture will move to both sides, and the part of the material in the protective cover 13 will move towards the protective cover 13. After moving a certain distance, it will move behind the distribution cone 21. In this way, the mixture separated by each auxiliary distribution pipe 15 will change again, and the mixture in all four parts will not be separated into the same layer.

[0022] To further ensure even distribution, in this embodiment, a connecting column 22 is also provided at the bottom of the main frame 2. The connecting column 22 and the distributing cone 21 are spaced apart. A rotating shaft 23 is provided between the side of the distributing cone 21 away from the direction of material movement and the connecting column 22. A guide plate 24 is provided on the side plate of the rotating shaft 23, and the guide plate 24 is evenly distributed in a ring on the rotating shaft 23. The rotating shaft 23 is rotatably positioned between the distributing cone 21 and the connecting column 22. The rotation of the rotating shaft 23 can be actively driven or driven by the movement of the mixture. Active drive is preferred, that is, a sprocket is provided on the spiral distributor to drive its rotation. Of course, the rotating shaft 23 should be positioned close to the main frame 2 so that it can play a certain role in distributing material. That is, the rotating shaft 23 is located in the upper part of the distributing cone 21.

[0023] To avoid hindering the movement of the mixture, in this embodiment, the connecting column 22 is spaced apart from the left conveyor 11 and the right conveyor 12. This allows the gap between the connecting column 22 and the left and right conveyors 11 to be used for the movement of the mixture.

[0024] With the above settings, the water replenishment of high solids content emulsified asphalt and fully recycled asphalt mixtures was completed without affecting the transport of the mixture, so that it could meet the construction needs in high-temperature weather.

[0025] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A high-solids-content emulsified asphalt fully recycled asphalt mixture paver, comprising a frame and a scraper conveyor rotatably mounted on the frame, the scraper conveyor including a left-side conveyor and a right-side conveyor arranged laterally, a protective cover being provided on the frame, the protective cover being disposed between the left-side and right-side conveyors, and a main frame being provided at one end of the frame, characterized in that... The frame is equipped with a distribution pipe, which is located on both sides of the frame. The protective cover is equipped with an auxiliary distribution pipe. The distribution pipe and the auxiliary distribution pipe are located below the main frame and are spaced apart along the moving direction of the scraper conveyor. The distribution pipe and the auxiliary distribution pipe are located above the scraper conveyor. Both the distribution pipe and the auxiliary distribution pipe are triangular prisms with one corner facing the moving direction of the mixture. The side of the distribution pipe and the auxiliary distribution pipe away from the moving direction of the mixture is equipped with an atomizing nozzle.

2. The high-solids-content emulsified asphalt and fully recycled asphalt mixture paver according to claim 1, characterized in that, The distribution pipes are arranged downwards at intervals along the moving direction of the scraper conveyor.

3. The high-solids-content emulsified asphalt and fully recycled asphalt mixture paver according to claim 2, characterized in that, The bottom of the main frame is provided with a material distribution cone, which is located above the left and right conveyors. The material distribution cone is triangular in shape with one of its edges facing the direction of material movement.

4. The high-solids-content emulsified asphalt and fully recycled asphalt mixture paver according to claim 3, characterized in that, The bottom of the main frame is also provided with a connecting column, and the connecting column and the distributing cone are spaced apart front and back. A rotating shaft is provided between the side of the distributing cone away from the direction of movement of the mixture and the connecting column. A guide plate is provided on the side plate of the rotating shaft. The guide plate is evenly distributed in a ring on the rotating shaft. The rotating shaft is rotatably disposed between the distributing cone and the connecting column.

5. The high-solids-content emulsified asphalt fully recycled asphalt mixture paver according to claim 4, characterized in that, The connecting column is spaced apart from the left and right conveyors.

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