Asphalt mixture heating regeneration stirring cylinder and stirring equipment

Abstract

The utility model relates to the technical field of asphalt stirring processing, in particular to an asphalt mixture heating regeneration stirring cylinder and stirring equipment. The stirring device comprises a cylinder body, wherein a stirring cavity is formed in the cylinder body; the stirring assembly is arranged in the stirring cavity, the stirring assembly comprises a stirring shaft, the stirring shaft penetrates through the cylinder body and the stirring cavity, a plurality of stirring arms are evenly distributed on the part, located in the stirring cavity, of the stirring shaft, and stirring blades are arranged on the stirring arms; the cover plate is arranged on the stirring cavity, and a microwave heating magnetron is arranged on the cover plate. The microwave heating magnetron is arranged on the cover plate at the top of the stirring cylinder, and microwave energy is converted into heat energy, so that an asphalt mixture in the stirring cylinder is uniformly heated, the flowability of the asphalt mixture is improved, the bonding phenomenon of the inner wall of the stirring cylinder and the stirring shaft is reduced, and the uniform stirring condition of the asphalt mixture is greatly improved; the stirring quality and the production efficiency of the stirring shaft equipment are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of asphalt mixing and processing, and particularly relates to an asphalt mixture heating and regenerating mixing cylinder and mixing equipment. Background Technique

[0002] Asphalt mixture is an essential material in the construction of urban and rural roads, highways and airports. It is composed of various materials such as aggregates, powders, asphalt and additives, and is made by stirring and mixing. Asphalt mixture mixing equipment is one of the most important production and processing equipment in the preparation of asphalt mixture. Usually, the asphalt mixture is heated to the construction temperature and then added into the mixing cylinder of the asphalt mixture mixing equipment, and the mixing components are used to stir and mix the asphalt raw materials. The working performance of the asphalt mixture mixing equipment directly determines the operation quality and operation efficiency of the entire mixing equipment. However, in actual use, due to different mixing ratios according to the process requirements of hot mix asphalt mixture, high-viscosity asphalt materials are easily attached to the inner wall of the mixing cylinder, and the accumulated residual asphalt mixture will cause the use effect of the mixing equipment to gradually decline. For example, during the RAP (Recycled Asphalt Pavement) regeneration process, problems such as adhesion of the inner wall of the mixing cylinder, mixing shaft and mixing blades are more likely to occur, resulting in an increase in the actual filling rate in the mixing cylinder and an increase in mixing unevenness, seriously affecting product quality and equipment production efficiency; it will not only bring risks to the safe operation of the asphalt mixture mixing equipment, but also increase the working intensity of equipment cleaning, maintenance and maintenance.

[0003] To solve the above problems, heating the asphalt to increase its fluidity is an effective solution, but due to the special structure of the mixing cylinder, it is difficult to implement conventional heating methods. Therefore, providing an asphalt mixture mixing equipment with a new heating method is a problem that needs to be solved by those skilled in the art. Summary of the Utility Model

[0004] In order to solve the problem that it is difficult to implement the conventional heating method for asphalt mixing equipment in the above background technique, the utility model provides an asphalt mixture heating and regenerating mixing cylinder and mixing equipment, which can effectively heat the asphalt mixture and improve the conditions for uniform mixing of the asphalt mixture.

[0005] To achieve the above object, the utility model provides an asphalt mixture heating and regenerating mixing cylinder, comprising:

[0006] A cylinder body, in which a mixing cavity is provided;

[0007] A mixing component, arranged in the mixing cavity, the mixing component includes a mixing shaft, the mixing shaft penetrates through the cylinder body and the mixing cavity, and a plurality of mixing arms are evenly arranged on the part of the mixing shaft located in the mixing cavity, and mixing blades are arranged on the mixing arms;

[0008] The cover plate is arranged above the stirring cavity, and a microwave heating magnetron is provided on the cover plate.

[0009] Preferably, the number of the microwave heating magnetrons is multiple, and the long side directions and short side directions of two adjacent microwave heating magnetrons are arranged staggeredly.

[0010] Preferably, a cavity is arranged inside the stirring shaft, and heat-conducting oil rotary joints communicated with the cavity are arranged at both ends of the stirring shaft.

[0011] Preferably, the number of the stirring assemblies is multiple, and the rotation directions of the stirring shafts on adjacent stirring assemblies are opposite to each other.

[0012] Preferably, the cylinder body includes a U-shaped middle shell and end face support plates arranged at both ends of the middle shell, and the U-shaped middle shell and the two end face support plates enclose a U-shaped stirring cavity.

[0013] Preferably, a first inner lining plate attached to the middle shell and a second inner lining plate attached to the end face support plates are arranged in the stirring cavity.

[0014] Preferably, heat-conducting oil pipes are evenly arranged on the outer side of the cylinder body.

[0015] Preferably, a discharge port is arranged at the bottom of the cylinder body, and a discharge door adapted to the discharge port is also arranged at the bottom of the cylinder body.

[0016] Preferably, the discharge door includes a rotating door and rotating shafts arranged at both ends of the rotating door, and the rotating shafts are rotatably connected to the cylinder body; a cylinder seat is arranged on the cylinder body, a driving cylinder is movably connected to the cylinder seat, the driving cylinder is connected with a rotating swing arm, and the rotating swing arm is rotatably connected to the rotating shaft.

[0017] The present invention also provides an asphalt mixture heating and recycling stirring device, which includes the asphalt mixture heating and recycling stirring cylinder in any one of the above embodiments, and further includes a driving system and a power control system. The driving system is connected to the stirring shaft to drive the stirring shaft to rotate; the power control system is electrically connected to the microwave heating magnetron and the driving system respectively.

[0018] Compared with the prior art, the advantages of the present invention are as follows: By arranging a microwave heating magnetron on the cover plate at the top of the stirring cylinder, converting microwave energy into heat energy, the asphalt mixture in the stirring cylinder is evenly heated, the fluidity of the asphalt mixture is increased, the adhesion phenomenon on the inner wall of the stirring cylinder and the stirring shaft is reduced, the conditions for uniformly stirring the asphalt mixture are greatly improved, which is beneficial to the stirring quality of the stirring device and the improvement of production efficiency. Description of the Drawings

[0019] The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, in which:

[0020] Figure 1 is a schematic diagram of one direction of the asphalt mixture heating and recycling stirring cylinder provided by the embodiment of the present utility model;

[0021] Figure 2 is a schematic structural diagram of the stirring assembly provided by the embodiment of the present utility model;

[0022] Figure 3 is a schematic structural diagram of the cover plate provided by the embodiment of the present utility model;

[0023] Figure 4 is a schematic diagram of another direction of the asphalt mixture heating and recycling stirring cylinder provided by the embodiment of the present utility model;

[0024] Figure 5 is a schematic structural diagram of the asphalt mixture heating and recycling stirring equipment provided by the embodiment of the present utility model;

[0025] Figure 6 is a schematic structural diagram of the drive system provided by the embodiment of the present utility model.

[0026] List of reference numerals:

[0027] 1, frame;

[0028] 2, cylinder body; 201, intermediate housing; 202, end face support plate; 203, second inner lining plate; 204, first inner lining plate; 205, sealed bearing seat; 206, heat conduction oil pipe;

[0029] 3, stirring assembly; 301, stirring shaft; 302, stirring arm; 303, stirring blade; 304, end face blade; 305, heat conduction oil rotary joint; 307, fixed seat;

[0030] 4, drive system; 401, motor; 402, small pulley; 403, drive belt; 404, large pulley; 405, speed reducer; 406, small gear; 407, large gear;

[0031] 501, rotating door; 502, support rod; 503, rotating shaft; 504, support bearing seat; 505, rotating swing arm; 506, driving cylinder; 507, cylinder seat;

[0032] 6, microwave heating unit; 601, cover plate; 602, asphalt spraying port; 603, RAP inlet; 604, regenerant addition port; 605, microwave heating magnetron;

[0033] 7, power control system. Detailed implementation manners

[0034] The accompanying drawings are only for illustrative purposes and should not be construed as limiting the present utility model; it should be clear that the described embodiments are only some of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts belong to the scope of protection of the embodiments of the present utility model.

[0035] The terms used in the embodiments of the present utility model are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present utility model. The singular forms "a", "the" and "said" used in the embodiments of the present utility model and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0036] When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present utility model. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present utility model as detailed in the appended claims. In the description of the present utility model, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects and do not have to be used to describe a specific order or sequence, nor can they be construed as indicating or implying relative importance. 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.

[0037] In addition, in the description of the present utility model, unless otherwise specified, "a plurality of" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after. The following further elaborates on the present utility model in conjunction with the accompanying drawings and embodiments.

[0038] The following further elaborates on the present utility model in conjunction with the accompanying drawings and embodiments.

[0039] In order to solve the problems that occur in the plant-mixed hot recycling production process of the above asphalt mixture mixing equipment, more specifically, to improve the problem of asphalt mixture adhesion on the inner wall of the mixing cylinder, the mixing shaft, and the mixing blades, reduce the working intensity of equipment cleaning and maintenance, and improve the operation quality and efficiency of the equipment, as Figures 1-5As shown in the figure, this embodiment provides an asphalt mixture heating and recycling stirring cylinder, which includes a cylinder body 2. The cylinder body 2 is a U-shaped container with both ends closed and is welded by high-quality stainless steel. The cylinder body 2 includes a U-shaped middle shell 201 and end face support plates 202. The end face support plates 202 are arranged at both ends of the middle shell 201 to enclose a U-shaped stirring cavity. A stirring component 3 is arranged in the stirring cavity. The stirring component 3 is the core component of the entire asphalt mixture heating and recycling stirring cylinder and is responsible for mixing the asphalt mixture. The stirring component 3 includes a stirring shaft 301. The stirring shaft 301 penetrates through the cylinder body 2 and the stirring cavity. A plurality of stirring arms 302 are evenly distributed on the part of the stirring shaft 301 located in the stirring cavity. Stirring blades 303 are arranged on the stirring arms 302. The stirring blades 303 include their main bodies and end face blades 304 on the end faces. Sealed bearing seats 205 are arranged on both ends of the cylinder body 2, that is, on the end face support plates 202. Both ends of the stirring shaft 301 are connected to the sealed bearing seats 205 and extend out of the cylinder body 2. Fixed seats 307 are also connected to both ends of the stirring shaft 301 extending out of the cylinder body 2. A driving system 4 is also connected to one end of the stirring shaft 301 extending out of the cylinder body 2. The stirring shaft 301 drives the stirring blades 303 through the stirring arms 302 fixed on it to stir the asphalt mixture, and evenly mixes the asphalt and aggregates by rotation in the stirring cylinder. A microwave heating unit 6 is arranged on the stirring cavity. The microwave heating unit 6 mainly includes a cover plate 601. The cover plate 601 and the cylinder body 2 enclose to seal the stirring cavity. An inlet and a microwave heating magnetron 605 are arranged on the cover plate 601. This stirring cylinder heats the asphalt mixture in the stirring cavity by setting a microwave heating magnetron 605 at the top of the stirring cylinder. The characteristic of microwave heating is that the heated material itself converts microwave energy into heat energy, which is different from the heat radiation and conduction heating methods. It is heated evenly from the inside to the outside. The use of microwave heating in the RAP material recycling has a significant effect, enabling the asphalt mixture in the stirring cylinder to quickly heat up, with a short heating time, uniform heating, increasing the fluidity of the asphalt mixture, reducing the adhesion phenomenon on the inner wall of the stirring cylinder and the stirring shaft 301, greatly improving the conditions for uniform stirring of the asphalt mixture, and being beneficial to the stirring quality of the stirring shaft 301 equipment and improving production efficiency.

[0040] In a possible embodiment, wear-resistant linings are provided on the inner wall of the cylinder body 2. The wear-resistant linings include a first lining plate 204 and a second lining plate 203. The first lining plate 204 is attached to the inner wall of the middle shell 201, and the second lining plate 203 is attached to the inner wall of the end face support plate 202, which can effectively reduce the wear of the inner wall of the cylinder body 2 by the asphalt mixture driven by the stirring component 3.

[0041] In a possible embodiment, heat-conducting oil pipes 206 are evenly distributed at the outer bottom of the middle housing 201 of the cylinder block 2. The head and tail ends of the heat-conducting oil pipes 206 are provided with oil injection ports. The heat-conducting oil pipes 206 are evenly arranged in a serpentine shape at the outer bottom of the middle housing 201. This arrangement can heat and keep warm the asphalt mixture entering the mixing cylinder.

[0042] In a possible embodiment, as Figure 2 shown, a cavity is provided inside the mixing shaft 301. Heat-conducting oil rotary joints 305 communicating with the cavity are provided at both ends of the mixing shaft 301. The cavity is axially arranged inside the mixing shaft 301, so that hot oil can flow into the cavity from the heat-conducting oil rotary joint 305 at one end, heat the mixing shaft 301 and the asphalt mixture, and then flow out from the heat-conducting oil rotary joint 305 at the other end of the mixing shaft 301. The mixing shaft 301 drives the mixing blades 303 through the mixing arms 302 fixed thereon to mix the asphalt mixture. Inside the mixing cylinder, the asphalt and aggregates are evenly mixed by rotation, and the heat-conducting oil flowing through the core of the mixing shaft 301 heats and keeps warm the asphalt mixture.

[0043] In a possible embodiment, multiple groups of mixing assemblies 3 are provided on the cylinder block 2. The rotation directions of the mixing shafts 301 on adjacent mixing assemblies 3 are opposite to each other, so that the asphalt mixture can be stirred and heated more evenly.

[0044] In a possible embodiment, as Figure 3 shown, the feeding port on the cover plate 601 includes an asphalt spraying port 602, a RAP (reclaimed asphalt pavement) inlet, and a regenerant adding port 604. The RAP inlet 603 is arranged in the middle. The asphalt spraying port 602 and the regenerant adding port 604 are respectively arranged on both sides of the RAP inlet 603. Microwave heating magnetrons 605 are evenly distributed on the remaining part of the cover plate 601. To ensure that the microwave heating can evenly heat the asphalt reclaiming material in the mixing cylinder, the size of the cover plate 601 (292.1 mm in length and 146.05 mm in width in this embodiment) conforms to BJ8 of GB / T 35679-2017. The number of microwave heating magnetrons 605 is set according to the production capacity of the mixing cylinder, and the long side direction and the short side direction of adjacent two microwave heating magnetrons 605 are arranged staggeredly to make the heating as even as possible.

[0045] In a possible embodiment, as Figure 4As shown in the figure, a long strip-shaped discharge port is opened at the bottom of the cylinder block 2, and a discharge door adapted to the discharge port. The main body of the discharge door includes a rotating door 501, a support rod 502 and a rotating shaft 503. The rotating shaft 503 is arranged at both ends of the rotating door 501, and the support rod 502 is connected to the rotating shafts 503 at both ends to strengthen the strength of the entire discharge door. The remaining components also include a support bearing seat 504, a rotating swing arm 505, a driving cylinder 506 and a cylinder seat 507. The cylinder seat 507 is fixedly arranged on the cylinder block 2. The cylinder seat 507 is movably connected to the driving cylinder 506. The driving cylinder 506 is connected to the rotating swing arm 505, and the rotating swing arm 505 is rotatably connected to the rotating shaft 503. The discharge door is used for discharging the mixed material. When the stirring is completed, the mixed material is piled up near the discharge door. Therefore, it is required that the discharging time is fast, and at the same time, the closing process of the material door will not be stuck. This setting enables the discharge door to open and close the discharge port in a rotating manner through the cooperation of the driving cylinder 506 and the discharge door, and it is not easy to accumulate the mixed material.

[0046] In this embodiment, the mixing cylinder is heated by introducing a microwave heating magnetron 605 to assist the heat-conducting oil in insulating the mixing cylinder and the mixing shaft 301. The microwave heating is started for 3 to 5 minutes before the mixing operation, so that the residual materials in the mixing cylinder are heated and softened. The dried and heated asphalt mixture enters the mixing cylinder and contacts the cylinder wall with a small temperature difference to prevent adhesion. At the same time, according to the process requirements, during the mixing process of the asphalt mixture, the materials are further heated to obtain high-quality recycled asphalt mixture and improve the production efficiency. When it is necessary to clean the mixing cylinder, the characteristics of microwave heating the asphalt mixture are fully utilized, so that the materials absorb microwaves and are converted into heat energy. The materials are quickly heated to achieve the effect of convenient cleaning, reducing the workload and working intensity of manual cleaning.

[0047] In addition, as Figures 5-6 shown, this embodiment also provides an asphalt mixture heating and recycling mixing device, which includes the asphalt mixture heating and recycling mixing cylinder of any of the above embodiments, and also includes a frame 1, a driving system 4 and a power control system 7.

[0048] As Figure 5 shown, the frame 1 is the support skeleton of the asphalt mixture heating and recycling mixing device, responsible for supporting the overall structure of the device. It is composed of welded steel plates and steel pipes. The overall frame should have good stability and be able to bear the weight of all the parts for mixing. At the same time, the frame also needs to have sufficient rigidity and strength to meet the impact of the ultimate load. The power control system 7 is used to control the on-off of the power supply of the microwave heating magnetron 605, the motor 401 and other components.

[0049] As Figure 6As shown in the figure, the drive system 4 is an important part of the asphalt mixture heating and recycling mixing equipment, responsible for providing power for the mixing equipment; it includes a motor 401, a small pulley 402, a transmission belt 403, a large pulley 404, a reducer 405, a small gear 406, a large gear 407, a sealed bearing seat 205, etc. The motor 401 drives the small pulley 402, the small pulley 402 drives the transmission belt 403, the transmission belt 403 drives the reducer 405, the reducer 405 drives the small gear 406, and the small gear 406 drives the large gear 407. A large gear 407 is provided on each mixing shaft 301, and the large gears 407 on two adjacent mixing shafts 301 are meshed with each other; the performance of the motor 401 and the reducer 405 will affect the production operation of the equipment. The selection of the motor 401 and the reducer 405 needs to be determined according to the actual mixing volume. Under the condition of meeting the requirements of the mixing volume, excessive power should be avoided to damage the mixing equipment.

[0050] In this embodiment, when the asphalt mixture heating and recycling mixing equipment works, the aggregate, powder or RAP material of the asphalt mixture and asphalt, additives, etc. enter the inside of the cylinder body 2 from the asphalt spraying port 602, the RAP inlet 603 and the regenerant adding port 604 respectively. Start the microwave heating magnetron 605 to heat the asphalt mixture, and then make the heat transfer oil rotary joint 305 and the heat transfer oil pipe 206 pass through the hot oil to assist in heating the asphalt mixture. The mixing shaft 301 rotates to drive the mixing blades to fully mix, completing the mixing of the asphalt mixture and becoming a finished asphalt mixture with qualified temperature, ensuring the temperature required for construction (160°C - 170°C). The finished asphalt mixture in the cylinder body 2 is discharged from the discharge port; by arranging a microwave heating device on the top cover of the mixing cylinder, setting a heat transfer oil pipe 206 at the bottom of the mixing cylinder for heating and heat preservation, and arranging heat transfer oil heating and heat preservation on the core shaft of the mixing shaft 301, etc., effectively ensure the discharge temperature of the asphalt mixture and prevent the material from sticking; the utility model can protect the mixing cylinder and the mixing shaft 301, utilize the instantaneity, controllability and internal heating uniformity of microwave heating to avoid material sticking, and supplement heat transfer oil heat preservation to bring many benefits to the mixing of asphalt mixture.

[0051] The above embodiments only illustrate the principles and effects of the present utility model, rather than limiting the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. An asphalt mixture heating and recycling stirring cylinder, characterized in that, Comprising: A cylinder block, within which a stirring chamber is provided; A stirring assembly, arranged within the stirring chamber. The stirring assembly includes a stirring shaft which penetrates through the cylinder block and the stirring chamber. A plurality of stirring arms are evenly distributed on the part of the stirring shaft within the stirring chamber, and stirring blades are provided on the stirring arms; A cover plate, arranged above the stirring chamber, and a microwave heating magnetron is provided on the cover plate.

2. The asphalt mixture heating and recycling stirring cylinder according to claim 1, wherein The number of the microwave heating magnetrons is multiple, and the long side directions and short side directions of adjacent two microwave heating magnetrons are arranged in a staggered manner.

3. The asphalt mixture heating and recycling stirring cylinder according to claim 1, characterized in that, A cavity is provided inside the stirring shaft, and heat-conducting oil rotary joints communicated with the cavity are provided at both ends of the stirring shaft.

4. The asphalt mixture heating and recycling stirring cylinder according to claim 1, wherein The number of the stirring assemblies is multiple groups, and the rotation directions of the stirring shafts on adjacent stirring assemblies are opposite to each other.

5. The asphalt mixture heating and recycling stirring cylinder according to claim 1, characterized in that, The cylinder block includes a U-shaped middle shell and end face support plates provided at both ends of the middle shell. The U-shaped middle shell and the two end face support plates enclose a U-shaped stirring chamber.

6. The asphalt mixture heating and recycling stirring cylinder according to claim 5, characterized in that, A first inner lining plate fitting with the middle shell is provided within the stirring chamber, and a second inner lining plate fitting with the end face support plates is also provided within the stirring chamber.

7. The asphalt mixture heating and recycling stirring cylinder according to claim 1, characterized in that Heat-conducting oil pipes are evenly distributed on the outer side of the cylinder block.

8. The asphalt mixture heating and recycling stirring cylinder according to claim 1, characterized in that, A discharge port is provided at the bottom of the cylinder block, and a discharge door adapted to the discharge port is also provided at the bottom of the cylinder block.

9. The asphalt mixture heating and recycling stirring cylinder according to claim 8, wherein The discharge door includes a rotary door and rotary shafts provided at both ends of the rotary door. The rotary shafts are rotatably connected to the cylinder block; a cylinder seat is provided on the cylinder block, a driving cylinder is movably connected to the cylinder seat, the driving cylinder is connected with a rotary swing arm, and the rotary swing arm is rotatably connected to the rotary shaft.

10. An asphalt mixture heating and recycling mixing equipment, characterized in that, It includes the asphalt mixture heating and recycling stirring cylinder according to any one of claims 1-9, and further includes a driving system and a power control system. The driving system is connected to the stirring shaft to drive the stirring shaft to rotate; the power control system is electrically connected to the microwave heating magnetron and the driving system respectively.

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