Asphalt pavement aggregate surface adhesion enhancing equipment

Abstract

The utility model discloses asphalt pavement aggregate surface adhesion enhancing equipment which comprises a lime mixing system, an aggregate mixing system, a feeding system, a lime slurry recycling system and an aggregate drying bin, and the discharging end of the lime mixing system is communicated with the feeding end of the aggregate mixing system; the discharging end of the aggregate mixing system is communicated with the feeding end of the aggregate drying bin; the discharging end of the feeding system is communicated with the feeding end of the aggregate mixing system; and the lime slurry recovery system is arranged on a conveying line between the aggregate mixing system and the aggregate drying bin. The mixed slaked lime slurry is conveyed into the aggregate mixing system through the lime mixing system, and the effect of covering the surface of the aggregate with slaked lime is achieved in the aggregate mixing process, so that the adhesion of the aggregate and an asphalt cement material can be effectively improved, the stripping resistance and water damage resistance of the asphalt mixture are improved, and the service life of the asphalt mixture is prolonged. Therefore, the service life of the asphalt pavement is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of asphalt pavement construction, in particular to a device for enhancing the surface adhesion of asphalt pavement aggregates. Background Art

[0002] A large amount of aggregates are required during the construction of asphalt pavement projects, and their performance seriously affects the performance of asphalt pavement. In order to save transportation costs, local materials are often used to save project costs, but the mechanical properties of local stones may not meet the requirements. For example, although aggregates such as limestone have good adhesion to asphalt binders, they have poor wear resistance and are not easy to fully exert the interlocking effect between aggregates. On the other hand, acidic aggregates such as granite and quartzite have good mechanical properties, but due to their high SiO2 content, they are prone to poor adhesion to asphalt binders. During the long-term use of asphalt pavement, it is easy to peel off and drop particles. In addition, the influence of environmental factors such as precipitation can easily lead to further development of looseness, potholes and other diseases, which seriously affects the service life of asphalt pavement. Therefore, there is an urgent need for an asphalt mixing equipment that can improve the adhesion between asphalt binders. Utility Model Content

[0003] The utility model aims to provide a device for enhancing the surface adhesion of asphalt pavement aggregates. By setting up a lime mixing system, a layer of slaked lime can be coated on the surface of road aggregates during the asphalt production process, thereby improving the adhesion between the aggregates and the asphalt binder.

[0004] The utility model is realized by the following technical solutions:

[0005] An asphalt pavement aggregate surface adhesion enhancement device includes a lime mixing system, an aggregate mixing system, a feeding system, a lime slurry recovery system and an aggregate drying bin, wherein the discharge end of the lime mixing system is connected to the feed end of the aggregate mixing system, and the discharge end of the aggregate mixing system is connected to the feed end of the aggregate drying bin; the discharge end of the feeding system is connected to the feed end of the aggregate mixing system; and the lime slurry recovery system is arranged on the conveying route between the aggregate mixing system and the aggregate drying bin. In order to solve the above technical problems and achieve the corresponding technical effects, the utility model conveys the mixed slaked lime slurry to the aggregate mixing system through the lime mixing system, and realizes the effect of slaked lime coating on the aggregate surface during the aggregate mixing process, thereby effectively improving the adhesion between the aggregate and the asphalt binder, enhancing the asphalt mixture's ability to resist peeling and water damage, significantly improving the performance of the asphalt pavement, and thus extending its service life.

[0006] Further technical solutions:

[0007] The lime mixing system comprises a lime mixing cylinder, a ash storage bin and a water storage bin, wherein lime is stored in the ash storage bin, and a discharge end of the ash storage bin is connected to a feed end of the lime mixing cylinder;

[0008] Furthermore: water is stored in the water storage bin, and the discharge end of the water storage bin is connected to the feed end of the lime mixing tank.

[0009] Further: the lime mixing system also includes a spiral scale and a water flow meter, the spiral scale is arranged between the lime mixing cylinder and the ash storage bin, and one end of the spiral scale is connected to the discharge end of the ash storage bin, and the other end of the spiral scale is connected to the feed end of the lime mixing cylinder;

[0010] Further: the water flow meter is arranged at the discharge end of the water storage bin.

[0011] Further: the aggregate mixing system includes an aggregate mixing cylinder and a mixing lime feeding pump, the mixing lime feeding pump is arranged between the aggregate mixing cylinder and the lime mixing cylinder, and the feed end of the mixing lime feeding pump is connected to the lime mixing cylinder, and the discharge end of the mixing lime feeding pump is connected to the aggregate mixing cylinder.

[0012] Furthermore: the feeding system includes a feeding conveyor belt and an aggregate bin, one end of the feeding conveyor belt is arranged below the discharge end of the aggregate bin, and the other end of the feeding conveyor belt is arranged above the feed end of the aggregate mixing cylinder.

[0013] Further: a plurality of the collecting bins are arranged above the horizontal section of the feeding conveyor belt, and different mixing raw materials are stored in the plurality of collecting bins respectively;

[0014] Furthermore: a plurality of material blocking partitions are evenly and equidistantly arranged on the feeding conveyor belt.

[0015] Further: the lime slurry recovery system comprises a lime slurry recovery conveyor belt and a lime slurry collecting tank, the lime slurry recovery conveyor belt is arranged between the aggregate mixing system and the aggregate drying bin, and one end of the lime slurry recovery conveyor belt is arranged at the discharge end of the aggregate mixing system, and the other end of the lime slurry recovery conveyor belt is arranged at the feed end of the aggregate drying bin;

[0016] Furthermore: the lime slurry collecting tank is connected below the lime slurry recovery conveyor belt.

[0017] Furthermore: a conveying grid belt is arranged on the lime slurry recovery conveyor belt, and a discharge port is connected to one end of the conveying grid belt close to the aggregate drying bin, and the discharge port is connected to the feed port of the aggregate drying bin.

[0018] Further: the lime slurry recovery system also includes a lime slurry recovery circulation pump and a lime slurry storage tank, the feed end of the lime slurry recovery circulation pump is connected to the lime slurry collecting tank, and the discharge end of the lime slurry recovery circulation pump is connected to the lime slurry storage tank;

[0019] Furthermore: the discharge end of the lime slurry storage tank is connected to the feed end of the lime mixing system.

[0020] Furthermore: a lime slurry flowmeter for monitoring the flow of lime slurry is provided at the discharge end of the lime slurry storage tank.

[0021] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0022] 1. The utility model provides an asphalt pavement aggregate surface adhesion enhancement device, which transports the mixed slaked lime slurry to the aggregate mixing system through the lime mixing system, and achieves the effect of coating the aggregate surface with slaked lime during the aggregate mixing process, thereby effectively improving the adhesion between the aggregate and the asphalt binder, improving the asphalt mixture's ability to resist peeling and water damage, significantly improving the performance of the asphalt pavement, and thus extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present utility model, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0024] Figure 1 It is a schematic diagram of the structure of the utility model;

[0025] Figure 2 Assemble the structural diagram of the lime mixing system and aggregate mixing system;

[0026] Figure 3 It is a schematic diagram of the feeding system structure;

[0027] Figure 4 Schematic diagram of the lime slurry recovery system Figure 1 ;

[0028] Figure 5 Schematic diagram of the lime slurry recovery system Figure 2 .

[0029] Marks and corresponding parts names in the attached drawings:

[0030] 1-lime mixing system, 2-aggregate mixing system, 3-feeding system, 4-lime slurry recovery system, 5-aggregate drying bin, 11-lime mixing cylinder, 12-ash storage bin, 13-water storage bin, 14-screw scale, 15-water flow meter, 21-aggregate mixing cylinder, 22-mixing lime feeding pump, 31-feeding conveyor belt, 32-aggregate bin, 33-material baffle, 41-lime slurry recovery conveyor belt, 42-lime slurry collecting tank, 43-transmission grid belt, 44-discharge port, 45-lime slurry recovery circulation pump, 46-lime slurry storage tank, 47-lime slurry flow meter. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

[0032] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is apparent to those skilled in the art that these specific details are not necessary to implement the present invention. In other embodiments, in order to avoid confusing the present invention, well-known structures, circuits, materials or methods are not specifically described.

[0033] Throughout the specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment," "an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily all refer to the same embodiment or example. In addition, particular features, structures, or characteristics may be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. In addition, it will be appreciated by those of ordinary skill in the art that the figures provided herein are for illustrative purposes and that the figures are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] In the description of the present invention, the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the scope of protection of the present invention.

[0035] Example:

[0036] like Figure 1 to Figure 5 As shown, the utility model is an asphalt pavement aggregate surface adhesion enhancement device, comprising a lime mixing system 1, an aggregate mixing system 2, a feeding system 3, a lime slurry recovery system 4 and an aggregate drying bin 5, the discharge end of the lime mixing system 1 is connected with the feed end of the aggregate mixing system 2, the discharge end of the aggregate mixing system 2 is connected with the feed end of the aggregate drying bin 5; the discharge end of the feeding system 3 is connected with the feed end of the aggregate mixing system 2; the lime slurry recovery system 4 is arranged on the conveying route between the aggregate mixing system 2 and the aggregate drying bin 5. In this embodiment, during the production of asphalt paving aggregate, slaked lime slurry is first prepared through the lime mixing system 1, and then the slaked lime and asphalt aggregate are mixed through the aggregate mixing system 2, so that the surface of the aggregate is effectively coated with a layer of slaked lime, thereby effectively improving the adhesion between the aggregate and the asphalt binder, enhancing the asphalt mixture's resistance to spalling and water damage, significantly improving the performance of the asphalt pavement, and thereby extending its service life.

[0037] In this embodiment, the following specific lime mixing system 1 is provided, but it is not limited to the following system, and any system structure capable of achieving lime mixing can be equivalent to replace the lime mixing system 1 in this embodiment. Specifically, the lime mixing system 1 includes a lime mixing cylinder 11, an ash storage bin 12, and a water storage bin 13. The ash storage bin 12 stores lime, and the discharge end of the ash storage bin 12 is connected to the feed end of the lime mixing cylinder 11; the water storage bin 13 stores water, and the discharge end of the water storage bin 13 is connected to the feed end of the lime mixing cylinder 11. Furthermore, the lime mixing system 1 further includes a spiral scale 14 and a water flow meter 15. The spiral scale 14 is arranged between the lime mixing cylinder 11 and the ash storage bin 12, and one end of the spiral scale 14 is connected to the discharge end of the ash storage bin 12, and the other end of the spiral scale 14 is connected to the feed end of the lime mixing cylinder 11; the water flow meter 15 is arranged at the discharge end of the water storage bin 13. The arrangement of the spiral scale 14 and the water flow meter 15 can accurately control the proportion of the slaked lime slurry. At the same time, the ash storage bin 12 should also be used with a bin cover to isolate the lime in the bin from the external humid air, so as to prevent the lime from reacting with water.

[0038] The aggregate mixing system 2 includes an aggregate mixing cylinder 21 and a mixing lime feeding pump 22, wherein the mixing lime feeding pump 22 is disposed between the aggregate mixing cylinder 21 and the lime mixing cylinder 11, and the feeding end of the mixing lime feeding pump 22 is connected to the lime mixing cylinder 11, and the discharging end of the mixing lime feeding pump 22 is connected to the aggregate mixing cylinder 21. In this embodiment, the lime slurry prepared in the lime mixing cylinder 11 is transported to the aggregate mixing cylinder 21 by the mixing lime feeding pump 22 to be mixed with the aggregate, thereby achieving the effect of coating the surface of the asphalt aggregate with slaked lime.

[0039] This embodiment provides the following specific structure of a feeding system 3, wherein the feeding system 3 includes a feeding conveyor belt 31 and a collection bin 32, wherein one end of the feeding conveyor belt 31 is arranged below the discharge end of the collection bin 32, and the other end of the feeding conveyor belt 31 is arranged above the feed end of the aggregate mixing cylinder 21. Furthermore, a plurality of collection bins 32 are arranged above the horizontal section of the feeding conveyor belt 31, and different mixing raw materials are stored in the plurality of collection bins 32 respectively; by storing different mixing raw materials in the plurality of collection bins 32 respectively, the effect of adding a plurality of different raw materials at the same time can be achieved, and at the same time, a plurality of material blocking baffles 33 are evenly and evenly spaced on the feeding conveyor belt 31, and the material blocking baffles 33 can be used to more effectively transport the raw materials.

[0040] The lime slurry recovery system 4 includes a lime slurry recovery conveyor belt 41 and a lime slurry collecting tank 42. The lime slurry recovery conveyor belt 41 is arranged between the aggregate mixing system 2 and the aggregate drying bin 5, and one end of the lime slurry recovery conveyor belt 41 is arranged at the discharge end of the aggregate mixing system 2, and the other end of the lime slurry recovery conveyor belt 41 is arranged at the feed end of the aggregate drying bin 5; the lime slurry collecting tank 42 is connected to the bottom of the lime slurry recovery conveyor belt 41. In this embodiment, the aggregate surface discharged from the discharge end of the aggregate mixing system 2 is still adhered to excess lime slurry. If it is directly introduced into the aggregate drying bin 5, it will not only increase the difficulty of drying the aggregate by the aggregate drying bin 5, but also cause waste of slaked lime. Therefore, the excess slaked lime slurry is collected by setting the lime slurry collecting tank 42 between the aggregate mixing system 2 and the aggregate drying bin 5. Specifically, when the lime slurry recovery conveyor belt 41 is used for aggregate transportation, the slaked lime slurry falls to the lime slurry collecting tank 42 for collection under the action of its own gravity. In order to improve the separation effect of excess lime slurry, in this embodiment, a conveying grid belt 43 is provided on the lime slurry recovery conveyor belt 41, and the conveying grid belt 43 is connected to a discharge port 44 near one end of the aggregate drying bin 5, and the discharge port 44 is connected to the feed port of the aggregate drying bin 5. Further, in order to realize the recycling of the collected excess slurry, in this embodiment, the lime slurry recovery system 4 also includes a lime slurry recovery circulation pump 45 and a lime slurry storage tank 46, the feed end of the lime slurry recovery circulation pump 45 is connected to the lime slurry collection tank 42, and the discharge end of the lime slurry recovery circulation pump 45 is connected to the lime slurry storage tank 46; the discharge end of the lime slurry storage tank 46 is connected to the feed end of the lime mixing system 1. And in order to effectively control the amount of lime slurry, the discharge end of the lime slurry storage tank 46 is provided with a lime slurry flowmeter 47 for monitoring the flow of lime slurry.

[0041] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A device for enhancing the surface adhesion of asphalt pavement aggregate, characterized in that: It comprises a lime mixing system (1), an aggregate mixing system (2), a feeding system (3), a lime slurry recovery system (4) and an aggregate drying bin (5), wherein the discharge end of the lime mixing system (1) is connected to the feed end of the aggregate mixing system (2), and the discharge end of the aggregate mixing system (2) is connected to the feed end of the aggregate drying bin (5); The discharge end of the feeding system (3) is in communication with the feed end of the aggregate mixing system (2); The lime slurry recovery system (4) is arranged on the conveying route between the aggregate mixing system (2) and the aggregate drying bin (5).

2. The device for enhancing the surface adhesion of asphalt pavement aggregate according to claim 1, characterized in that: The lime mixing system (1) comprises a lime mixing cylinder (11), a ash storage bin (12) and a water storage bin (13), wherein lime is stored in the ash storage bin (12), and a discharge end of the ash storage bin (12) is connected to a feed end of the lime mixing cylinder (11); The water storage bin (13) stores water, and the discharge end of the water storage bin (13) is connected to the feed end of the lime mixing tank (11).

3. The device for enhancing the surface adhesion of asphalt pavement aggregate according to claim 2, characterized in that: The lime mixing system (1) further comprises a spiral scale (14) and a water flow meter (15), wherein the spiral scale (14) is arranged between the lime mixing cylinder (11) and the ash storage bin (12), and one end of the spiral scale (14) is connected to the discharge end of the ash storage bin (12), and the other end of the spiral scale (14) is connected to the feed end of the lime mixing cylinder (11); The water flow meter (15) is arranged at the discharge end of the water storage bin (13).

4. The device for enhancing the surface adhesion of asphalt pavement aggregate according to claim 2, characterized in that: The aggregate mixing system (2) comprises an aggregate mixing cylinder (21) and a mixing lime feeding pump (22), wherein the mixing lime feeding pump (22) is arranged on the aggregate mixing cylinder (21) and the lime mixing cylinder (11), and the feeding end of the mixing lime feeding pump (22) is connected to the lime mixing cylinder (11), and the discharging end of the mixing lime feeding pump (22) is connected to the aggregate mixing cylinder (21).

5. The device for enhancing the surface adhesion of asphalt pavement aggregate according to claim 4, characterized in that: The feeding system (3) comprises a feeding conveyor belt (31) and an aggregate bin (32), one end of the feeding conveyor belt (31) being arranged below the discharge end of the aggregate bin (32), and the other end of the feeding conveyor belt (31) being arranged above the feed end of the aggregate mixing cylinder (21).

6. The device for enhancing the surface adhesion of asphalt pavement aggregate according to claim 5, characterized in that: A plurality of material collection bins (32) are arranged above the horizontal section of the loading conveyor belt (31), and different mixing raw materials are respectively stored in the plurality of material collection bins (32); A plurality of material blocking partitions (33) are evenly and equidistantly arranged on the loading conveyor belt (31).

7. The device for enhancing the surface adhesion of asphalt pavement aggregate according to claim 1, characterized in that: The lime slurry recovery system (4) comprises a lime slurry recovery conveyor belt (41) and a lime slurry collecting tank (42), wherein the lime slurry recovery conveyor belt (41) is arranged between the aggregate mixing system (2) and the aggregate drying bin (5), and one end of the lime slurry recovery conveyor belt (41) is arranged at the discharge end of the aggregate mixing system (2), and the other end of the lime slurry recovery conveyor belt (41) is arranged at the feed end of the aggregate drying bin (5); The lime slurry collecting tank (42) is connected below the lime slurry recovery conveyor belt (41).

8. The device for enhancing the surface adhesion of asphalt pavement aggregate according to claim 7, characterized in that: The lime slurry recovery conveyor belt (41) is provided with a conveying grid belt (43), and one end of the conveying grid belt (43) close to the aggregate drying bin (5) is connected to a discharge port (44), and the discharge port (44) is connected to a feed port of the aggregate drying bin (5).

9. The device for enhancing the surface adhesion of asphalt pavement aggregate according to claim 7, characterized in that: The lime slurry recovery system (4) further comprises a lime slurry recovery circulation pump (45) and a lime slurry storage tank (46), wherein a feed end of the lime slurry recovery circulation pump (45) is connected to the lime slurry collecting tank (42), and a discharge end of the lime slurry recovery circulation pump (45) is connected to the lime slurry storage tank (46); The discharge end of the lime slurry storage tank (46) is connected to the feed end of the lime mixing system (1).

10. The device for enhancing the surface adhesion of asphalt pavement aggregate according to claim 9, characterized in that: A lime slurry flow meter (47) for monitoring the flow of lime slurry is provided at the discharge end of the lime slurry storage tank (46).

Images