Mixing device for asphalt production

Abstract

The utility model relates to heating mixing equipment technical field discloses a kind of mixing device for asphalt production, including base, and preheating box and mixing box are respectively fixedly connected on base, first combustor is fixedly connected with the front side of preheating box, motor is fixedly connected on the base between preheating box and mixing box, exhaust tank is fixedly connected with the top of mixing box, a plurality of second combustor is fixedly connected with the side of mixing box, and first combustor, second combustor and motor are electrically connected with the main control ware on base respectively through connecting line. Wavy and mutually interpenetrating slow-flow plate can extend the flow path of hot air in mixing box, reduce flow rate to improve heat exchange efficiency, reduce heat directly discharged, and part of hot air can be guided back to different cavities through blowing mechanism, maintain the internal temperature of mixing box stable, enhance the heat preservation effect of inner cylinder, thereby reduce energy consumption, reduce processing cost, give consideration to production quality and economy.

Description

Technical Field

[0001] This utility model relates to the field of heating and mixing equipment technology, and in particular to a mixing device for asphalt production. Background Technology

[0002] The most commonly used mixing equipment in asphalt processing is asphalt mixture mixing equipment, which can mix asphalt, sand and gravel aggregates, mineral powder and other raw materials in a precise ratio to produce asphalt mixtures that meet road construction standards. When asphalt mixing equipment is running, aggregates are metered in the cold silo and then heated in the drying drum before being mixed with mineral powder in proportion. Asphalt is heated to a fluid state by the heating equipment and then pumped into the mixing tank by the asphalt pump. Currently, some existing asphalt mixing equipment places the asphalt mixture in the inner cylinder of the mixing tank and heats the cavity inside the mixer by spraying flames or hot air into the mixing tank through a heater. However, the flow path of the flames or hot air inside the cavity is short, and only part of the heat is conducted to the inner cylinder through the cavity wall to heat the asphalt mixture. The high-temperature gas that has not been fully heat-exchanged will quickly escape from the exhaust port. In addition, the exhaust port of the mixing tank needs to maintain air pressure balance to avoid pressure on the cavity, and cannot be completely sealed. This further leads to heat loss with the exhaust gas, requiring more energy to be continuously input to maintain the target temperature, increasing the asphalt processing cost. Furthermore, the asphalt mixture in the inner cylinder heats up slowly and is prone to uneven heating, which may result in local unmelted areas or overheating and aging, affecting the quality of the asphalt mixture. Utility Model Content

[0003] The purpose of this invention is to provide a mixing device for asphalt production, which improves heat exchange efficiency through a flow-retardant plate and enhances insulation through a counter-blowing mechanism. Combined with a preheating and stirring design, it reduces heat loss and energy consumption, effectively solving the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A mixing device for asphalt production includes a base, on which a preheating box and a mixing box are fixedly connected. A first burner is fixedly connected to the front of the preheating box. A motor is fixedly connected to the base between the preheating box and the mixing box. An exhaust box is fixedly connected to the top of the mixing box. Multiple second burners are fixedly connected to one side of the mixing box. The first burner, the second burners, and the motor are electrically connected to a main controller on the base via connecting wires. A discharge gate is movably connected to the mixing box between two second burners. An inner cylinder is fixedly connected inside the mixing box. A shroud is fixedly connected between the top of the inner cylinder and the mixing box. Multiple baffles are fixedly connected between the mixing box and the shroud. Multiple baffles are fixedly connected between the inner cylinder and the baffle. A counter-blowing mechanism is fixedly connected to the inside of the shroud.

[0005] As a further preferred embodiment of this utility model, an oil storage tank is fixedly connected to the base located at the front side of the motor, and an oil pump on one side of the oil storage tank is connected to the oil injection end of the first burner and the second burner through multiple oil pipes, so as to continuously supply fuel to the first burner and the second burner, thereby enabling the first burner and the second burner to heat the asphalt and asphalt mixture in the preheating box and the mixing box.

[0006] As a further preferred embodiment of this utility model, a delivery pump is fixedly connected to the top of the preheating box. The input end of the delivery pump extends into the preheating box, and the output end of the delivery pump is connected to the inner cavity of the inner cylinder through a pipe. The preheating box stores asphalt raw materials and preheats them through a first burner, which can then be used in conjunction with the delivery pump to replenish asphalt raw materials into the mixing box.

[0007] As a further preferred embodiment of this utility model, a stirring shaft is rotatably connected inside the inner cylinder. One end of the stirring shaft is fixedly connected to the output end of the motor via a coupling. After the motor drives the stirring shaft to rotate, the stirring shaft can move axially inside the inner cylinder and cooperate with multiple stirring blades arranged on the outer side to stir the asphalt mixture inside the inner cylinder.

[0008] As a further preferred embodiment of this utility model, a first exhaust port is provided between the partition and the flow buffer on one side of the shroud, and a second exhaust port is provided between the mixing chamber and the partition located above the first exhaust port. The first exhaust port is used to discharge hot air between the inner cylinder and the flow buffer, while the second exhaust port can discharge hot air in the cavity between the partition and the mixing chamber.

[0009] As a further preferred embodiment of this utility model, the flow-delay plate is wavy, with two adjacent flow-delay plates interlacing with each other. Multiple wavy flow-delay plates interlacing with each other create a multi-bend channel between two adjacent flow-delay plates, thereby reducing the flow velocity of the hot air blown into the inner cylinder and the partition plate by the second burner, improving the heat exchange efficiency, and increasing the heating temperature of the inner cylinder on the internal asphalt mixture.

[0010] As a further preferred embodiment of this utility model, the blowing mechanism includes a first pair of blowing pipes and a second pair of blowing pipes, with the second pair of blowing pipes inserted into the middle of the first pair of blowing pipes. The two ends of the first pair of blowing pipes and the second pair of blowing pipes are respectively fixedly connected to one side of the inner cavity of the shroud. One end of the first pair of blowing pipes and the second pair of blowing pipes is respectively connected to the cavity between the corresponding inner cylinder and the partition, and the other end is respectively connected to the cavity between the corresponding partition and the mixing box. This allows some of the hot air in the cavity formed by the inner cylinder and the two partitions to be blown into the cavity formed by the mixing box and the partition on the other side through the first pair of blowing pipes or the second pair of blowing pipes before being discharged. This keeps the cavity between the partition and the mixing box at a certain temperature and improves the heat preservation effect on the inner cylinder.

[0011] Compared with the prior art, the present invention has the following beneficial effects: In this invention, the wave-shaped and interwoven flow-damping plates can extend the flow path of hot air in the mixing chamber, reduce the flow velocity to improve heat exchange efficiency, reduce direct heat discharge, and guide some hot air back to different chambers through the counter-blowing mechanism to maintain the internal temperature of the mixing chamber and enhance the heat preservation effect of the inner cylinder, thereby reducing energy consumption, reducing processing costs, and balancing production quality and economy. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a cross-sectional view of the mixing box of this utility model; Figure 3 This is a first sectional view of the inner cylinder of this utility model; Figure 4 This is a second sectional view of the inner cylinder of this utility model; Figure 5 for Figure 4 Enlarged view of point A in the middle; Figure 6 This is a schematic diagram of the flow-retardant plate structure of this utility model.

[0013] In the diagram: 1. Base; 2. Preheating box; 3. First burner; 4. Motor; 5. Mixing box; 6. Exhaust box; 7. Second burner; 8. Discharge gate; 9. Inner cylinder; 10. Baffle plate; 11. Flow buffer plate; 12. First exhaust port; 13. Counter-blowing mechanism; 14. Oil storage tank; 15. Conveying pump; 16. Cover; 17. First counter-blowing pipe; 18. Second counter-blowing pipe; 19. Stirring shaft; 20. Second exhaust port. Detailed Implementation

[0014] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0015] like Figures 1-6As shown, the present invention provides a mixing device for asphalt production, comprising a base 1, on which a preheating box 2 and a mixing box 5 are fixedly connected respectively. A first burner 3 is fixedly connected to the front side of the preheating box 2. A motor 4 is fixedly connected to the base 1 between the preheating box 2 and the mixing box 5. An exhaust box 6 is fixedly connected to the top of the mixing box 5. Multiple second burners 7 are fixedly connected to one side of the mixing box 5. The first burner 3, the second burners 7 and the motor 4 are electrically connected to the main controller on the base 1 through connecting wires. A discharge gate 8 is movably connected to the mixing box 5 between the two second burners 7. An inner cylinder 9 is fixedly connected inside the mixing box 5. A shroud 16 is fixedly connected between the top of the inner cylinder 9 and the mixing box 5. Multiple baffles 10 are fixedly connected between the mixing box 5 and the shroud 16. Multiple baffles 11 are fixedly connected between the inner cylinder 9 and the baffle 11. A counter-blowing mechanism 13 is fixedly connected inside the shroud 16.

[0016] like Figure 1 As shown, an oil storage tank 14 is fixedly connected to the base 1 located in front of the motor 4. The oil pump on one side of the oil storage tank 14 is connected to the oil injection end of the first burner 3 and the second burner 7 through multiple oil pipes, so that fuel can be continuously supplied to the first burner 3 and the second burner 7, so that the first burner 3 and the second burner 7 can heat the asphalt and asphalt mixture in the preheating box 2 and the mixing box 5. A delivery pump 15 is fixedly connected to the top of the preheating box 2. The input end of the delivery pump 15 extends into the preheating box 2, and the output end of the delivery pump 15 is connected to the inner cavity of the inner cylinder 9 through a pipe. The asphalt raw materials stored in the preheating box 2 are preheated by the first burner 3, so asphalt raw materials can be replenished to the mixing box 5 in conjunction with the delivery pump 15.

[0017] like Figures 2-6As shown, an agitator shaft 19 is rotatably connected inside the inner cylinder 9. One end of the agitator shaft 19 is fixedly connected to the output end of the motor 4 via a coupling. After the motor 4 drives the agitator shaft 19 to rotate, the agitator shaft 19 can move axially inside the inner cylinder 9 and cooperate with multiple agitator blades arranged on the outer side to agitate the asphalt mixture inside the inner cylinder 9. A first exhaust port 12 is provided between the baffle 10 and the buffer plate 11 on one side of the diaphragm 16. A second exhaust port 20 is provided between the mixing chamber 5 above the first exhaust port 12 and the baffle 10. The first exhaust port 12 is used to discharge hot air between the inner cylinder 9 and the buffer plate 11, while the second exhaust port 20 can discharge hot air in the cavity between the baffle 10 and the mixing chamber 5. The buffer plate 11 is wavy, and two adjacent buffer plates 11 intersect each other. Multiple wavy buffer plates 11 intersect each other, so that a multi-curved channel is formed between two adjacent buffer plates 11, so that the second The hot air flow rate blown into the space between the inner cylinder 9 and the partition 10 by the burner 7 is reduced, and the heat exchange efficiency is increased, thereby increasing the heating temperature of the inner cylinder 9 on the internal asphalt mixture. The blowing mechanism 13 includes a first pair of blowing pipes 17 and a second pair of blowing pipes 18, with the second pair of blowing pipes 18 inserted into the middle of the first pair of blowing pipes 17. The two ends of the first pair of blowing pipes 17 and the second pair of blowing pipes 18 are respectively fixedly connected to one side of the inner side of the partition 16. One end of the first pair of blowing pipes 17 and the second pair of blowing pipes 18 is respectively connected to the cavity between the corresponding inner cylinder 9 and the partition 10, and the other end is respectively connected to the cavity between the corresponding partition 10 and the mixing box 5. This allows some of the hot air in the cavity formed by the inner cylinder 9 and the two partitions 10 to be blown into the cavity formed by the mixing box 5 and the partition 10 on the other side before being discharged, thereby maintaining a certain temperature between the partition 10 and the mixing box 5 and improving the heat preservation effect on the inner cylinder 9.

[0018] It should be noted that this utility model is a mixing device for asphalt production. During operation, fuel is first delivered to the injection ends of the first burner 3 and the second burner 7 through multiple oil pipes via an oil pump on one side of the oil storage tank 14, providing fuel for the burners under the control of the main controller. Subsequently, the main controller starts the first burner 3 to preheat the asphalt raw materials stored in the preheating box 2. After the asphalt reaches a fluid state, the conveying pump 15 at the top of the preheating box 2 is started. The input end of the conveying pump 15 draws the preheated asphalt from the preheating box 2, and then delivers the asphalt to the inner cylinder 9 in the mixing box 5 through the pipe connected to the output end, thus completing the preheating and conveying of the asphalt raw materials and mixing them with the aggregate in the mixing box 5. The main controller starts the second burner 7, which injects hot air into the mixing chamber 5. When the hot air enters the area between the inner cylinder 9 and the baffle 10, it enters the multi-bend channel formed by the wavy and intersecting flow deflectors 11, which reduces the air velocity and lengthens the flow path, allowing for more thorough contact with the outer wall of the inner cylinder 9. Heat is then transferred to the asphalt mixture inside the inner cylinder 9 through heat conduction, improving heat exchange efficiency. The hot air passing between the two flow deflectors 11 is concentrated in the first exhaust port 12 and discharged through the exhaust box 6. Simultaneously, some of the hot air... When the air is discharged, one end of the first pair of blowpipes 17 is connected to the cavity between the inner cylinder 9 and the partition 10, and the other end is connected to the cavity between the partition 10 and the mixing box 5. The second pair of blowpipes 18 is inserted in the middle of the first pair of blowpipes 17. One end is also connected to the cavity between the inner cylinder 9 and the partition 10, and the other end is connected to the cavity between the partition 10 and the mixing box 5. This can guide the part of the hot air between the inner cylinder 9 and the partition 10 that has not been completely heat-exchanged back to the cavity between the partition 10 and the mixing box 5, maintain the overall temperature stability inside the mixing box 5, enhance the heat preservation effect on the inner cylinder 9, and reduce heat loss. The main controller starts the motor 4, and the output of the motor 4 drives the stirring shaft 19 inside the inner cylinder 9 to rotate through the coupling. When the stirring shaft 19 rotates, it works with multiple stirring blades on the outside to fully stir the asphalt mixture inside the inner cylinder 9, ensuring that the asphalt is mixed evenly with other raw materials, while avoiding local overheating or unmelted conditions. During the heating and mixing process, the hot air between the inner cylinder 9 and the buffer plate 11 can be discharged through the first exhaust port 12, and the hot air in the cavity between the partition plate 10 and the mixing box 5 is discharged through the second exhaust port 20. Finally, the air is discharged outside the device through the exhaust box 6 at the top of the mixing box 5, maintaining the air pressure balance inside the mixing box 5.

[0019] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A mixing device for asphalt production, characterized in that: The system includes a base (1), on which a preheating box (2) and a mixing box (5) are fixedly connected respectively. A first burner (3) is fixedly connected to the front side of the preheating box (2). A motor (4) is fixedly connected to the base (1) located between the preheating box (2) and the mixing box (5). An exhaust box (6) is fixedly connected to the top of the mixing box (5). Multiple second burners (7) are fixedly connected to one side of the mixing box (5). The first burner (3), the second burners (7), and the motor (4) are connected to the base (1) via connecting wires. The main controller on the device is electrically connected. The mixing box (5) located between the two second burners (7) is movably connected to the discharge gate (8). The mixing box (5) is fixedly connected to the inner cylinder (9). The top of the inner cylinder (9) is fixedly connected to the mixing box (5). Multiple baffles (10) are fixedly connected between the mixing box (5) and the baffle (16). Multiple baffles (11) are fixedly connected between the inner cylinder (9) and the baffle (11). The inner side of the baffle (16) is fixedly connected to the counter-blowing mechanism (13).

2. The mixing device for asphalt production according to claim 1, characterized in that: An oil storage tank (14) is fixedly connected to the base (1) located in front of the motor (4), and the oil pump on one side of the oil storage tank (14) is connected to the oil injection end of the first burner (3) and the second burner (7) through multiple oil pipes respectively.

3. A mixing device for asphalt production according to claim 1, characterized in that: A delivery pump (15) is fixedly connected to the top of the preheating box (2). The input end of the delivery pump (15) extends into the preheating box (2), and the output end of the delivery pump (15) is connected to the inner cavity of the inner cylinder (9) through a pipe.

4. A mixing device for asphalt production according to claim 1, characterized in that: The inner cylinder (9) is rotatably connected to a stirring shaft (19), one end of which is fixedly connected to the output end of a motor (4) via a coupling.

5. A mixing device for asphalt production according to claim 1, characterized in that: A first exhaust port (12) is provided between the partition (10) and the buffer plate (11) on one side of the shroud (16), and a second exhaust port (20) is provided between the mixing box (5) above the first exhaust port (12) and the partition (10).

6. A mixing device for asphalt production according to claim 1, characterized in that: The flow control plate (11) is wavy, and two adjacent flow control plates (11) interweave with each other.

7. A mixing device for asphalt production according to claim 1, characterized in that: The blowing mechanism (13) includes a first blowing pipe (17) and a second blowing pipe (18), and the second blowing pipe (18) is inserted and connected to the middle of the first blowing pipe (17). The two ends of the first blowing pipe (17) and the second blowing pipe (18) are respectively fixedly connected to one side of the shroud (16). One end of the first blowing pipe (17) and the second blowing pipe (18) are respectively connected to the cavity between the corresponding inner cylinder (9) and the partition (10), and the other end is respectively connected to the cavity of the corresponding partition (10) and the mixing box (5).

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