Mixing and heating device for recycled asphalt concrete
By designing a regenerated asphalt concrete mixing heating device using independent heating and mixing technology, the problems of uneven heating and uneven mixing of raw materials in traditional production processes are solved, and efficient production, cost reduction and quality improvement are achieved.
Patent Information
- Application Number
- CN202422198734.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-09-09
AI Technical Summary
During the production process of traditional recycled asphalt concrete, it is difficult to accurately control the optimal heating temperature and mixing uniformity of different types of raw materials, resulting in poor quality, waste of energy and high production costs.
A mixing heating device for regenerated asphalt concrete is designed, using independent heating methods and mixing and stirring technology. By setting multiple heating zones and stirrers in the mixing barrel, the rapid and uniform heating and mixing of raw materials can be achieved.
It realizes rapid and uniform heating and mixing of raw materials, improves production efficiency, ensures stability and consistency of raw material performance, reduces energy waste and production costs, and facilitates mixing and processing at the construction site.
Smart Images
Figure CN222990523U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of recycled asphalt concrete, and particularly relates to a mixing and heating device for recycled asphalt concrete. Background Technique
[0002] Recycled asphalt concrete is a building material that realizes resource reuse by recycling and processing old asphalt pavement materials. This material is made by excavating, recycling, crushing, and screening old asphalt pavements, and then remixing and stirring them with a regenerant, new asphalt materials, new aggregates, etc. in a certain proportion.
[0003] Among them, the heating temperature of ordinary asphalt should be strictly controlled between 150°C and 170°C. This range is determined based on the standard regulations for asphalt heating in road construction. Within this temperature range, asphalt exhibits good fluidity, facilitating construction operations, and ensuring that the performance of asphalt will not be damaged due to excessive heating. If the heating temperature exceeds this range, asphalt is prone to aging, which will affect its service performance and lifespan. For recycled asphalt, its regeneration temperature range varies depending on the asphalt regenerant, usually between 120°C and 140°C. In addition, the heating temperature of aggregates needs to be controlled between 160°C and 180°C, and the ex-factory temperature of the mixture needs to be maintained between 140°C and 165°C. When transported to the construction site, the temperature should be kept between 120°C and 150°C to ensure construction quality and the effectiveness of asphalt materials.
[0004] In the traditional production process of recycled asphalt concrete, the heating and mixing of raw materials are often treated in a unified manner. This method is difficult to accurately control the optimal heating temperature and mixing uniformity of different types of raw materials, which has an adverse impact on the final quality of recycled asphalt concrete. At the same time, uneven heating may also cause energy waste and increase production costs. In addition, due to the large volume of general mixers, they are not conducive to transportation. Usually, after processing at the factory, the recycled asphalt concrete needs to be transported out by a transporter, which further increases the transportation cost.
[0005] In view of this, the utility model proposes an innovative mixing and heating device for recycled asphalt concrete. This device adopts an independent heating method, effectively avoiding the energy waste problem that may be brought by the traditional unified heating method, thus significantly reducing production costs. Its structure is compact and convenient for transportation, and it can be directly mixed and processed at the construction site, further reducing transportation costs and ensuring the efficient progress of the mixing and heating process of recycled asphalt concrete.
[0006] Regarding the problems in the related technology, no effective solutions have been proposed yet. Content of the Utility Model
[0007] To achieve the above object, the present utility model provides the following technical solutions: A mixed heating device for recycled asphalt concrete, comprising a mixing cylinder. Inside the mixing cylinder, there are respectively arranged a first asphalt heating zone, a second asphalt heating zone, and a mixed heating zone. At both ends of the second asphalt heating zone inside the mixing cylinder, there are welded partitions. The first asphalt heating zone, the second asphalt heating zone, and the mixed heating zone are separated by the partitions. A top cover is installed on the top of the mixing cylinder. On the surfaces of the first asphalt heating zone and the second asphalt heating zone of the top cover, there are fixed asphalt pumps. At the inlet and outlet of the asphalt pump, there are connected conveying pipes. The conveying pipe connected to the inlet of the asphalt pump penetrates through the top cover and extends into the first asphalt heating zone and the second asphalt heating zone. The pipe body of the conveying pipe connected to the outlet of the asphalt pump is evenly connected with branch pipes. The branch pipes penetrate through the top cover at the mixed heating zone and are placed inside the mixed heating zone. A stirring shaft is installed inside the mixing cylinder. The shaft body of the stirring shaft is rotationally connected to the partitions and the side wall of the mixing cylinder. On the shaft body of the stirring shaft located in the first asphalt heating zone, the second asphalt heating zone, and the mixed heating zone, there are fixed stirrers. One end of the stirring shaft is installed with a driving member.
[0008] As a preferred technical solution of the present utility model, the mixing cylinder comprises an inner cylinder and an outer cylinder. Electric heating wires are evenly installed between the inner cylinder and the outer cylinder. A heat insulation layer is arranged on the outer side of the outer cylinder.
[0009] As a preferred technical solution of the present utility model, on the surfaces of the first asphalt heating zone, the second asphalt heating zone, and the mixed heating zone of the top cover, there are respectively arranged feeding ports. On the top of the feeding ports of the top cover, there are installed flip covers.
[0010] As a preferred technical solution of the present utility model, at the bottom of the mixing cylinder located in the mixed heating zone, there is arranged a discharge port. A baffle is installed at the discharge port.
[0011] As a preferred technical solution of the present utility model, the mixing cylinder and the top cover are tightly connected by bolts.
[0012] Compared with the prior art, the beneficial effects of the present utility model are:
[0013] By adopting the technologies of independent heating and mixing stirring, the utility model realizes the rapid and uniform heating and mixing process of raw materials, thereby significantly improving the production efficiency. During the heating process, various raw materials can be heated under their optimal temperature conditions, ensuring the stability and consistency of the raw material properties. At the same time, the sufficiency of mixing and stirring also greatly improves the overall quality of the recycled asphalt concrete. In addition, the utility model adopts an independent heating method, effectively avoiding the energy waste problem that may be caused by the traditional unified heating method, thereby reducing the production cost. The utility model has a reasonable design and a compact structure, which is convenient for transportation and mixing processing at the construction site, reduces the transportation cost, and ensures that the mixing and heating process of the recycled asphalt concrete can be efficiently realized, demonstrating its excellent technical performance and practical value. Description of the Drawings
[0014] The drawings are used to provide a further understanding of the utility model and constitute a part of the specification. Together with the embodiments of the utility model, they are used to explain the utility model and do not constitute a limitation to the utility model. In the drawings:
[0015] Figure 1 is a schematic diagram of the overall structure of the utility model;
[0016] Figure 2 is a schematic sectional structure diagram of the utility model;
[0017] In the figure: 1, mixing drum; 2, first asphalt heating area; 3, second asphalt heating area; 4, mixing and heating area; 5, partition board; 6, top cover; 7, asphalt pump; 8, conveying pipe; 9, branch pipe; 10, stirring shaft; 11, stirrer; 12, driving part; 13, inner cylinder; 14, outer cylinder; 15, heat insulation layer; 16, feed inlet; 17, flip cover; 18, discharge outlet; 19, electric heating wire. Detailed Embodiment
[0018] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the utility model.
[0019] Embodiment
[0020] Please refer to Figure 1-2, the present utility model provides the following technical solutions: A mixed heating device for recycled asphalt concrete, which consists of a mixing cylinder 1, inside which there are respectively arranged a first asphalt heating zone 2, a second asphalt heating zone 3 and a mixed heating zone 4. Inside the mixing cylinder 1, at both ends of the second asphalt heating zone 3, there are firmly welded partitions 5, effectively separating the above three heating zones. A top cover 6 is installed on the top of the mixing cylinder 1. Above the first asphalt heating zone 2 and the second asphalt heating zone 3, an asphalt pump 7 is fixedly installed on the top cover 6. Both the inlet and outlet of the asphalt pump 7 are connected through a delivery pipe 8. The delivery pipe 8 at the inlet penetrates the top cover 6 and extends into the first asphalt heating zone 2 and the second asphalt heating zone 3. For the delivery pipe 8 at the outlet, branch pipes 9 are evenly arranged on its pipe body, and these branch pipes 9 also penetrate the top cover 6 and enter the mixed heating zone 4. Inside the mixing cylinder 1, there is also installed a stirring shaft 10, which is rotatably connected to the partition 5 and the side wall of the mixing cylinder 1. On the shaft body of the stirring shaft 10 in the first asphalt heating zone 2, the second asphalt heating zone 3 and the mixed heating zone 4, there are fixed stirrers 11 to ensure uniform mixing in each zone. At one end of the stirring shaft 10, there is also installed a driving member 12 to provide the power required for stirring.
[0021] In order to make the heating operation more convenient, in this embodiment, as a preferred technical solution of the present utility model, the mixing cylinder 1 includes an inner cylinder 13 and an outer cylinder 14. Electric heating wires 19 are evenly installed between the inner cylinder 13 and the outer cylinder 14, and a heat insulation layer 15 is arranged on the outer side of the outer cylinder 14.
[0022] In order to facilitate feeding, in this embodiment, as a preferred technical solution of the present utility model, the top cover 6 is provided with feeding ports 16 on the surfaces of the first asphalt heating zone 2, the second asphalt heating zone 3 and the mixed heating zone 4, and a flip cover 17 is installed on the top of the top cover 6 at the feeding ports 16.
[0023] In order to facilitate discharging, in this embodiment, as a preferred technical solution of the present utility model, the mixing cylinder 1 is provided with a discharge port 18 at the bottom of the mixed heating zone 4, and a baffle is installed at the discharge port 18.
[0024] In order to facilitate opening the top cover 6 in the later stage to clean the inside of the mixing cylinder 1, in this embodiment, as a preferred technical solution of the present utility model, the mixing cylinder 1 and the top cover 6 are tightly connected by bolts.
[0025] In summary, by implementing the technical solution of the present utility model, during use, the inner cylinder 13 is heated by the electric heating wire 19. In particular, for the first asphalt heating zone 2 and the second asphalt heating zone 3 in the mixing cylinder 1, an intermittent heating method is adopted to ensure that the temperature is controlled within a reasonable range and to avoid the denaturation of asphalt caused by excessive temperature. Subsequently, according to the process requirements, recycled asphalt and recycling agent, new asphalt, and new aggregates are sequentially added at the feed ports 16 of the top cover 6 corresponding to the first asphalt heating zone 2, the second asphalt heating zone 3, and the mixing heating zone 4. In each heating zone, heating is performed according to the set appropriate temperature, and the driving member 12 is used to drive the rotation of the stirring shaft 10, thereby driving the rotation of the stirrer 11 on the shaft body to achieve sufficient stirring of the materials. During this process, the contact area between the materials and the inner cylinder 13 is continuously updated, ensuring uniform heating of the materials. After the heating process is completed, the asphalt pump 7 is used to pump the recycled asphalt and new asphalt in the first asphalt heating zone 2 and the second asphalt heating zone 3 into the mixing heating zone 4 through the delivery pipe 8 and the branch pipe 9. In this zone, these asphalts are fully mixed with the aggregates previously heated in the mixing heating zone 4 under the action of the corresponding stirrer 11, completing the entire process flow.
[0026] Finally, it should be noted that in the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "setting", "connection", "fixation", "swivel connection", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0027] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A mixing and heating device for recycled asphalt concrete, comprising a mixing drum (1), characterized in that: The mixing cylinder (1) is provided with a first asphalt heating zone (2), a second asphalt heating zone (3) and a mixing heating zone (4) respectively. Partition plates (5) are welded at both ends of the second asphalt heating zone (3) in the mixing cylinder (1). The first asphalt heating zone (2), the second asphalt heating zone (3) and the mixing heating zone (4) are separated by the partition plates (5). A top cover (6) is installed on the top of the mixing cylinder (1). An asphalt pump (7) is fixed on the surface of the top cover (6) located in the first asphalt heating zone (2) and the second asphalt heating zone (3). The inlet and outlet of the asphalt pump (7) are both connected to a delivery pipe (8). The delivery pipe (8) connected to the inlet of the asphalt pump (7) passes through The top cover (6) extends into the first asphalt heating zone (2) and the second asphalt heating zone (3); the delivery pipe (8) connected to the outlet of the asphalt pump (7) is evenly connected with a branch pipe (9); the branch pipe (9) passes through the top cover (6) at the mixing heating zone (4) and is placed inside the mixing heating zone (4); a stirring shaft (10) is installed inside the mixing barrel (1); the shaft body of the stirring shaft (10) is rotatably connected to the partition (5) and the side wall of the mixing barrel (1); the shaft bodies of the stirring shaft (10) located in the first asphalt heating zone (2), the second asphalt heating zone (3) and the mixing heating zone (4) are all fixed with a stirrer (11); one end of the stirring shaft (10) is installed with a driving member (12).
2. The mixing and heating device for regenerated asphalt concrete according to claim 1, characterized in that: The mixing cylinder (1) comprises an inner cylinder (13) and an outer cylinder (14), electric heating wires (19) are evenly installed between the inner cylinder (13) and the outer cylinder (14), and a heat-insulating layer (15) is arranged on the outside of the outer cylinder (14).
3. The mixing and heating device for regenerated asphalt concrete according to claim 1, characterized in that: The top cover (6) is provided with feed ports (16) on the surfaces of the first asphalt heating zone (2), the second asphalt heating zone (3) and the mixing heating zone (4), and a flap (17) is installed on the top of the feed port (16).
4. The mixing and heating device for regenerated asphalt concrete according to claim 3 is characterized in that: The mixing barrel (1) is provided with a discharge port (18) at the bottom of the mixing and heating zone (4), and a baffle is installed at the discharge port (18).
5. The mixing and heating device for regenerated asphalt concrete according to claim 4, characterized in that: The mixing cylinder (1) and the top cover (6) are fastened together by bolts.