A recycling asphalt mixing plant

Abstract

The application relates to the technical field of asphalt processing equipment, in particular to a regenerated asphalt stirring processing equipment which comprises an inner roller for placing new asphalt and an outer roller sleeved on the inner roller and used for placing old asphalt, one end of the inner roller is provided with an inlet for the new asphalt to enter, the other end is provided with an outlet for the new asphalt to discharge, the outer roller is provided with a feeding port for the old asphalt to enter, the cavity of the outer roller is communicated with the outlet of the inner roller, and the inner roller is provided with a heating device for heating the new asphalt. The regenerated asphalt stirring processing equipment has the effect that the phenomenon that the old asphalt is prone to aging in the heating and stirring process can be reduced.

Description

Technical Field

[0001] This application relates to the technical field of asphalt processing equipment, and in particular to a recycled asphalt mixing and processing equipment. Background Technology

[0002] Asphalt is a dark brown, complex mixture composed of hydrocarbons of different molecular weights and their non-metallic derivatives. It is a high-viscosity organic liquid, mostly existing in the form of tar or asphalt, with a black surface. It is soluble in carbon disulfide. Asphalt is a waterproof, moisture-proof, and corrosion-resistant organic cementitious material, mainly divided into three types: coal tar pitch, petroleum asphalt, and natural asphalt. It is used in industries such as coatings, plastics, and rubber, as well as in road paving. Asphalt is most commonly used for road paving. Asphalt pavement is formed by spreading and compacting asphalt concrete. Asphalt concrete is a mixture made by thoroughly mixing asphalt material with a certain viscosity and appropriate amount with mineral aggregates of a certain gradation. Asphalt concrete has the characteristics of sufficient stability under high temperature environment, crack resistance under low temperature condition, good water stability, long-lasting anti-aging and skid resistance, which ensures the good service function of asphalt pavement.

[0003] Currently, asphalt pavements, under the influence of traffic and various other factors during use, gradually become brittle and age. This is actually due to the aging of the asphalt binder within the pavement material. Chemical analysis of old asphalt shows a decrease in oil content and an increase in asphaltene; its road performance indicators are characterized by decreased penetration, increased softening point, and reduced ductility. Since asphalt is not a single component but a mixture of oil, resins, and asphaltene, it can be easily modified by adding certain components or by remixing it with new asphalt materials to create new asphalt mixtures that exhibit new technical properties. In the petroleum industry, there are processes that blend hard and soft asphalt in specific proportions to produce asphalt. The recycling of old asphalt materials is based on the principles of blended asphalt production to obtain recycled asphalt.

[0004] Therefore, in order to improve the utilization efficiency of asphalt and the recycling of asphalt pavement, the old asphalt that is cut off from the old asphalt pavement is usually mixed with new asphalt and then recycled agents, mineral powder, etc. can be added before use.

[0005] The inventors believe that the existing technology has the drawback that the temperature is difficult to control during the heating and stirring of old asphalt, which easily leads to aging. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention proposes a recycled asphalt mixing and processing equipment. This equipment effectively reduces the aging phenomenon that easily occurs in old asphalt during the heating and mixing process.

[0007] This application provides a recycled asphalt mixing and processing equipment, which adopts the following technical solution:

[0008] A recycled asphalt mixing and processing device includes an inner drum for holding new asphalt and an outer drum sleeved on the inner drum for holding old asphalt. One end of the inner drum has an inlet for new asphalt to enter and the other end has an outlet for new asphalt to exit. The outer drum has a feed port for old asphalt to enter. The cavity of the outer drum is connected to the outlet of the inner drum. The inner drum is equipped with a heating device for heating the new asphalt.

[0009] By adopting the above technical solution, through the setting of inner and outer rollers, new asphalt can enter the inner roller through the inlet, and at the same time, the new asphalt in the inner roller is heated by the heating device. Meanwhile, old asphalt enters the outer roller through the feed inlet. After being heated, the new asphalt is discharged from the outlet of the inner roller. At this time, the new asphalt and the old asphalt are mixed. The heated new asphalt heats the old asphalt in the outer roller, thereby achieving the heating of the old asphalt. The heat of the two is neutralized. At the same time, the heat of the inner roller is conducted through the side wall, transferring the heat to the outer side wall of the inner roller, and reheating the mixed asphalt. This can reduce the phenomenon of aging of old asphalt during the heating and mixing process.

[0010] Optionally, the inner roller is provided with a conveying device, which includes a conveying assembly for conveying new asphalt and a drive assembly disposed on the outer roller for driving the conveying assembly to move.

[0011] By adopting the above technical solution, the conveying device is set up, the drive component is started, and the conveying component is driven to move. The conveying component can realize the conveying of new asphalt to the inner drum, thus making the conveying of new asphalt more convenient.

[0012] Optionally, the conveying assembly includes a rotating rod rotatably fitted onto an outer drum and a spiral blade mounted on the outer circumferential surface of the rotating rod for conveying new asphalt.

[0013] By adopting the above technical solution, when the rotating rod rotates, it can drive the spiral blades to rotate. When the spiral blades rotate, they can transport the new asphalt, thus realizing the transportation operation of the new asphalt.

[0014] Optionally, the drive assembly includes a worm gear mounted on a rotating rod, a worm meshing with the worm gear, and a drive component mounted on an outer drum for driving the worm to rotate.

[0015] By adopting the above technical solution, the starting drive component can drive the worm to rotate, which in turn drives the worm wheel to rotate. When the worm wheel rotates, the rotating rod can be rotated.

[0016] Optionally, the heating device includes a heating cylinder sleeved on the inner drum and a liquid supply assembly for supplying heating liquid into the heating cylinder, wherein a chamber for liquid storage is provided between the inner wall of the heating cylinder and the outer peripheral surface of the inner drum.

[0017] By adopting the above technical solution, the liquid supply component delivers heating liquid into the chamber, thereby heating the inner drum, making operation convenient.

[0018] Optionally, the rotating rod is provided with a stirring device, which includes a rotating frame mounted on the rotating rod and a stirring assembly mounted on the rotating frame for mixing new and old asphalt.

[0019] By adopting the above technical solution, and through the setting of the mixing device, when the rotating rod rotates, it can drive the rotating frame to rotate, and then drive the mixing component to rotate. This allows the new asphalt to be transported while the new asphalt and the old asphalt are mixed and stirred, resulting in a more uniform mixture of the new and old asphalt and a more efficient heating of the asphalt.

[0020] Optionally, the stirring assembly includes a plurality of stirring shafts rotatably fitted on a rotating frame and a plurality of stirring blades mounted on the stirring shafts.

[0021] By adopting the above technical solution, when the rotating frame rotates, it can drive multiple mixing shafts to rotate, which in turn drives multiple mixing blades to rotate. When the mixing blades rotate, it can realize the mixing operation of new asphalt and old asphalt.

[0022] Optionally, a scraper for scraping asphalt off the inner wall of the outer drum is installed on the stirring blade near the inner wall of the outer drum.

[0023] By adopting the above technical solution, the scraper is designed so that when the mixing blades rotate, the scraper can rotate simultaneously. When the scraper rotates, it can fully mix the new and old asphalt, and at the same time scrape off the asphalt on the inner wall of the outer roller, reducing the tendency of asphalt to stick to the inner wall of the outer roller, which would otherwise result in low asphalt utilization efficiency.

[0024] Optionally, the outer drum is provided with a rotating device, which includes a large gear ring mounted on the outer drum, a driving gear mounted on the rotating frame, and a driven gear mounted on the stirring shaft. The driven gear is located between the driving gear and the large gear ring, and one end of the driven gear meshes with the driving gear, while the other end meshes with the large gear ring.

[0025] By adopting the above technical solution, and through the setting of the rotating device, when the rotating frame rotates, it can drive the driving gear to rotate. When the driving gear rotates, it can drive the driven gear to rotate, which in turn drives the mixing shaft to rotate. This causes the mixing shaft to revolve around the central axis of the rotating rod while rotating on its own axis, driving the mixing blades to rotate. This makes the mixing of new and old asphalt more uniform.

[0026] Optionally, both the driving gear and the driven gear are provided with clearance grooves for new asphalt and old asphalt to pass through respectively.

[0027] By adopting the above technical solution and setting up the clearance trough, the transportation of new and old asphalt can be carried out through the clearance trough, making the transportation of new and old asphalt more efficient.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] With the inner and outer rollers, new asphalt enters the inner roller through the inlet and is heated by a heating device. Meanwhile, old asphalt enters the outer roller through the feed inlet. The heated new asphalt is discharged from the outlet of the inner roller, where it mixes with the old asphalt. The heated new asphalt then heats the old asphalt in the outer roller, thus neutralizing the heat. Simultaneously, the heat from the inner roller is conducted through its side walls to the outer wall, further heating the mixed asphalt. This process reduces the aging of the old asphalt during the heating and mixing process.

[0030] By setting up the conveying device, the drive component is activated, which drives the conveying component to move. The conveying component enables the conveying of new asphalt to the inner drum, thus making the conveying of new asphalt more convenient.

[0031] With the liquid supply component in place, the heating liquid is delivered into the chamber, thereby heating the inner drum, making operation convenient;

[0032] By setting up a mixing device, when the rotating rod rotates, it can drive the rotating frame to rotate, which in turn drives the mixing components to rotate. This allows the new asphalt to be transported while the new and old asphalt are mixed and stirred, resulting in a more uniform mixture of the new and old asphalt and more efficient heating of the asphalt.

[0033] By setting up the scraper, the rotation of the mixing blade can drive the scraper to rotate at the same time. When the scraper rotates, it can fully mix the new and old asphalt, and at the same time scrape off the asphalt on the inner wall of the outer drum, reducing the asphalt from sticking to the inner wall of the outer drum and causing low asphalt utilization efficiency.

[0034] By setting up a rotating device, when the rotating frame rotates, it can drive the driving gear to rotate. When the driving gear rotates, it can drive the driven gear to rotate, which in turn drives the mixing shaft to rotate. This causes the mixing shaft to revolve around the central axis of the rotating rod and rotate on its own axis, driving the mixing blades to rotate. This makes the mixing of new and old asphalt more uniform. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of this application;

[0036] Figure 2 This is a schematic diagram showing the connection relationship between the rotating rod and the stirring device;

[0037] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0038] Explanation of reference numerals in the attached drawings: 1. Inner drum; 2. Outer drum; 21. Feed inlet; 3. Heating device; 31. Heating cylinder; 311. Chamber; 4. Conveying device; 41. Conveying assembly; 411. Rotating rod; 412. Spiral blade; 42. Drive assembly; 421. Worm gear; 422. Worm; 423. Drive component; 5. Stirring device; 51. Rotating frame; 52. Stirring assembly; 521. Stirring shaft; 522. Stirring blade; 6. Scraper; 7. Rotating device; 71. Large gear ring; 72. Drive gear; 721. Relief groove; 73. Driven gear. Detailed Implementation

[0039] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0040] This application discloses a recycled asphalt mixing and processing equipment. (Refer to...) Figure 1 and Figure 2The system includes an inner roller 1 for holding new asphalt and an outer roller 2 fitted onto the inner roller 1 for holding old asphalt. Both the inner roller 1 and the outer roller 2 are hollow cylindrical structures. One end of the inner roller 1 has an inlet for new asphalt to enter, and the other end has an outlet for new asphalt to exit. The length of the outer roller 2 is greater than the length of the inner roller 1. The outer roller 2 has an outlet near the outlet of the inner roller 1 for discharging the mixed asphalt. A mixing cavity for mixing new and old asphalt is provided between one end of the outlet of the outer roller 2 and one end of the outlet of the inner roller 1. Both ends of the outer roller 2 in the length direction are provided with sealing plates for sealing the cavity between the inner side wall of the outer roller 2 and the outer side wall of the inner roller 1. The outer roller 2 has an inlet 21 for old asphalt to enter. The cavity of the outer roller 2 is connected to the outlet of the inner roller 1. A conveying mechanism (not shown in the figure) for conveying old asphalt can be provided inside the outer roller 2. A heating device 3 for heating new asphalt is provided on the inner roller 1.

[0041] Reference Figure 1 and Figure 2 New asphalt enters the inner drum 1 through the inlet and is heated by the heating device 3. Meanwhile, old asphalt enters the outer drum 2 through the feed inlet 21. After being heated, the new asphalt is discharged from the outlet of the inner drum 1. At this time, the new and old asphalts enter the mixing cavity and are mixed. The heated new asphalt heats the old asphalt in the outer drum 2, thus heating the old asphalt. The heat of the two is neutralized. At the same time, the heat of the inner drum 1 is conducted through the side wall to the outer wall of the inner drum 1, which heats the mixed asphalt again. This can reduce the aging phenomenon that the old asphalt is prone to during the heating and mixing process.

[0042] Reference Figure 2 and Figure 3 The inner roller 1 is provided with a conveying device 4 for conveying new asphalt. The conveying device 4 includes a conveying assembly 41 for conveying new asphalt and a driving assembly 42 provided on the outer roller 2 for driving the conveying assembly 41 to move. The conveying assembly 41 includes a rotating rod 411 rotatably coupled to the outer roller 2 and a spiral blade 412 fixedly installed on the outer circumference of the rotating rod 411 for conveying new asphalt. A plate is fixedly installed on the outer roller 2 to support the rotation of the rotating rod 411. The rotating rod 411 is arranged along the length of the outer roller 2, and the spiral blade 412 is arranged in a spiral shape along the length of the rotating rod 411.

[0043] Reference Figure 1 and Figure 2The drive assembly 42 includes a worm gear 421 fixedly mounted on the rotating rod 411, a worm 422 meshing with the worm gear 421, and a drive component 423 fixedly mounted on the outer roller 2 for driving the worm 422 to rotate. A plate supporting the rotation of the worm 422 is fixedly mounted on the outer roller 2. An mounting plate is fixedly mounted on the outer roller 2. The drive component 423 can be directly an electric motor. The housing of the drive component 423 is fixedly mounted on the mounting plate. The output shaft of the drive component 423 is coaxially and fixedly connected to the worm 422.

[0044] Reference Figure 2 and Figure 3 When the drive unit 423 is activated, it can drive the worm gear 422 to rotate, which in turn drives the worm wheel 421 to rotate, which in turn drives the rotating rod 411 to rotate. When the rotating rod 411 rotates, it can drive the spiral blade 412 to rotate, and the spiral blade 412 can be used to transport the new asphalt in the inner drum 1, thereby making the transportation of the new asphalt more convenient.

[0045] Reference Figure 2 and Figure 3 The heating device 3 includes a heating cylinder 31 sleeved on the inner roller 1 and a liquid supply assembly for supplying heating liquid into the heating cylinder 31. The heating cylinder 31 has a hollow cylindrical structure, and both ends of the heating cylinder 31 are fixedly connected to the inner roller 1. Both ends of the heating cylinder 31 are sealed ends. A chamber 311 for liquid storage is provided between the inner wall of the heating cylinder 31 and the outer circumference of the inner roller 1. A liquid supply hole and a liquid drain hole can be opened on the heating cylinder 31. The liquid supply assembly can directly adopt a liquid supply pipe, a liquid supply pump and a liquid return pipe. The liquid supply pump draws hot water or hot oil and delivers it into the chamber 311 through the liquid supply pipe and the liquid supply hole to heat the inner roller 1. The water or oil after heating is discharged through the liquid drain hole and the liquid return pipe and then reused, making the use of water or oil more energy-saving and environmentally friendly.

[0046] Reference Figure 2 and Figure 3A mixing device 5 for mixing asphalt is provided on the rotating rod 411. The mixing device 5 includes a rotating frame 51 fixedly installed on the rotating rod 411 and a mixing component 52 set on the rotating frame 51 for mixing new and old asphalt. The rotating frame 51 is located outside the inner drum 1 and has a cross-shaped structure. The mixing component 52 is located on the end of the rotating frame 51 away from the rotating rod 411. The stirring assembly 52 includes multiple stirring shafts 521 rotatably fitted on a rotating frame 51 and multiple stirring blades 522 fixedly installed on the stirring shafts 521. The stirring shafts 521 are arranged along the length of the outer drum 2. The rotating frame 51 provides rotatable support for the stirring shafts 521. There are four stirring shafts 521 in total, and the four stirring shafts 521 are evenly arranged around the central axis of the rotating rod 411. Three stirring blades 522 are arranged on one stirring shaft 521. The three stirring blades 522 are spirally arranged along the length of the stirring shaft 521, and the three stirring blades 522 are angled to the stirring shaft 521.

[0047] Reference Figure 2 and Figure 3 A scraper 6 is fixedly installed on the mixing blade 522 near the inner wall of the outer roller 2 for scraping off the asphalt on the inner wall of the outer roller 2. The scraper 6 is an arc plate that fits against the inner wall of the outer roller 2.

[0048] Reference Figure 2 and Figure 3 When the rotating rod 411 rotates, it drives the rotating frame 51 to rotate. When the rotating frame 51 rotates along the central axis of the rotating rod 411, it drives the four stirring shafts 521 to rotate along the central axis of the rotating rod 411. When the stirring shafts 521 rotate, they drive the stirring blades 522 to rotate. The stirring shafts 521 and the stirring blades 522 mix the new asphalt and the old asphalt. After the heated new asphalt and the old asphalt are fully mixed in the mixing cavity, they are discharged from the outlet of the outer drum 2 for subsequent processing.

[0049] Reference Figure 2 and Figure 3 The outer drum 2 is equipped with a rotating device 7 for driving the stirring shaft 521 to rotate. The rotating device 7 includes a large gear ring 71 fixedly installed on the outer drum 2, a driving gear 72 fixedly installed on the rotating frame 51, and a driven gear 73 fixedly installed on the stirring shaft 521. The central axes of the driving gear 72 and the large gear ring 71 coincide. The large gear ring 71 is fitted on the driving gear 72. There are four driven gears 73 in total. The driven gears 73 are adapted to the stirring shaft 521. The four driven gears 73 are evenly arranged around the central axis of the driving gear 72. The driven gears 73 are located between the driving gear 72 and the large gear ring 71. One end of the driven gear 73 meshes with the driving gear 72, and the other end meshes with the large gear ring 71.

[0050] Reference Figure 2 and Figure 3 When the rotating rod 411 rotates, it can drive the rotating frame 51 to rotate, which in turn drives the driving gear 72 to rotate. When the driving gear 72 rotates, it can drive the driven gear 73 to rotate along the central axis of the driven gear 73. At the same time, the rotating frame 51 drives the driven gear 73 to rotate along the central axis of the rotating rod 411, which in turn drives the mixing shaft 521 to rotate. This causes the mixing shaft 521 to revolve around the central axis of the rotating rod 411 and rotate on its own axis, driving the mixing blade 522 to rotate, thus fully mixing the new asphalt and the old asphalt.

[0051] Reference Figure 2 and Figure 3 Both the driving gear 72 and the driven gear 73 are provided with relief grooves 721 for the passage of new asphalt and old asphalt, respectively. Multiple relief grooves 721 are provided on both the driving gear 72 and the driven gear 73, and these grooves are evenly spaced and spaced apart. When new and old asphalt are conveyed into the mixing cavity, they can be conveyed through the relief grooves 721, making the conveying of new and old asphalt more efficient.

[0052] Reference Figures 1-3 When it is necessary to process new asphalt and old asphalt, the new asphalt is first put into the inner roller 1 through the inlet of the inner roller 1. At the same time, hot water or hot oil is drawn out by the liquid supply pump and transported into the chamber 311 through the liquid supply pipe and liquid supply hole to heat the inner roller 1, thereby heating the new asphalt in the inner roller 1.

[0053] Meanwhile, old asphalt enters the outer drum 2 through the feed inlet 21. Activating the drive unit 423 drives the worm gear 422 to rotate, which in turn drives the worm wheel 421 to rotate, and the rotating rod 411 to rotate. When the rotating rod 411 rotates, it drives the spiral blades 412 to rotate, thus conveying the new asphalt in the inner drum 1. The heated new asphalt is conveyed by the spiral blades 412 and discharged from the outlet of the inner drum 1. At this point, the new and old asphalts enter the mixing cavity and mix. The heated new asphalt further heats the old asphalt in the outer drum 2, thus heating the old asphalt. The heat from both is neutralized. Simultaneously, the heat from the inner drum 1 is conducted through the side wall, transferring heat to the outer wall of the inner drum 1, further heating the mixed asphalt. This reduces the aging phenomenon that easily occurs in the old asphalt during the heating and mixing process.

[0054] Simultaneously, when the rotating rod 411 rotates, it drives the rotating frame 51 to rotate. When the rotating frame 51 rotates along the central axis of the rotating rod 411, it drives the four stirring shafts 521 to rotate along the central axis of the rotating rod 411. When the stirring shafts 521 rotate, they drive the stirring blades 522 to rotate. The stirring shafts 521 and the stirring blades 522 mix the new asphalt and the old asphalt. The rotation of the rotating frame 51 drives the drive gear 72 to rotate. When the drive gear 72 rotates, it drives the driven gear 73 to rotate along the central axis of the driven gear 73. This causes the rotating frame 51 to drive the driven gear 73 to rotate along the central axis of the rotating rod 411, which in turn drives the stirring shaft 521 to rotate. The stirring shaft 521 revolves around the central axis of the rotating rod 411 and rotates on its own axis, driving the stirring blades 522 to rotate. After the heated new asphalt and old asphalt are fully mixed in the mixing cavity, they are discharged from the outlet of the outer drum 2 for subsequent processing.

[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A recycled asphalt mixing and processing equipment, characterized in that: It includes an inner roller (1) for placing new asphalt and an outer roller (2) sleeved on the inner roller (1) for placing old asphalt. One end of the inner roller (1) is provided with an inlet for new asphalt to enter and the other end is provided with an outlet for new asphalt to exit. The outer roller (2) is provided with a feed port (21) for old asphalt to enter. The cavity of the outer roller (2) is connected to the outlet of the inner roller (1). The inner roller (1) is provided with a heating device (3) for heating the new asphalt. The inner roller (1) is provided with a conveying device (4), which includes a conveying component (41) for conveying new asphalt and a driving component (42) provided on the outer roller (2) for driving the conveying component (41) to move. The conveying assembly (41) includes a rotating rod (411) rotatably fitted on the outer drum (2) and a spiral blade (412) mounted on the outer circumferential surface of the rotating rod (411) for conveying new asphalt. The rotating rod (411) is provided with a stirring device (5), which includes a rotating frame (51) installed on the rotating rod (411) and a stirring assembly (52) installed on the rotating frame (51) for mixing new and old asphalt. The stirring assembly (52) includes a plurality of stirring shafts (521) rotatably fitted on a rotating frame (51) and a plurality of stirring blades (522) mounted on the stirring shafts (521). The outer roller (2) is provided with a rotating device (7). The rotating device (7) includes a large gear ring (71) installed on the outer roller (2), a driving gear (72) installed on the rotating frame (51), and a driven gear (73) installed on the stirring shaft (521). The driven gear (73) is located between the driving gear (72) and the large gear ring (71). One end of the driven gear (73) meshes with the driving gear (72), and the other end meshes with the large gear ring (71). Both the driving gear (72) and the driven gear (73) are provided with clearance grooves (721) for new asphalt and old asphalt to pass through respectively.

2. The recycled asphalt mixing and processing equipment according to claim 1, characterized in that: The drive assembly (42) includes a worm wheel (421) mounted on a rotating rod (411), a worm (422) meshing with the worm wheel (421), and a drive member (423) mounted on the outer roller (2) for driving the worm (422) to rotate.

3. The recycled asphalt mixing and processing equipment according to claim 2, characterized in that: The heating device (3) includes a heating cylinder (31) sleeved on the inner roller (1) and a liquid supply assembly for supplying heating liquid into the heating cylinder (31). A chamber (311) for liquid storage is provided between the inner wall of the heating cylinder (31) and the outer peripheral surface of the inner roller (1).

4. The recycled asphalt mixing and processing equipment according to claim 1, characterized in that: The stirring blade (522) is equipped with a scraper (6) near the inner wall of the outer drum (2) for scraping the asphalt on the inner wall of the outer drum (2).

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