Additive asphalt foaming device

Abstract

The utility model provides an additive asphalt foaming device. The additive asphalt foaming device comprises a metering, stirring and heating device, the additive metering scale is connected with the metering, stirring and heating device; the asphalt metering scale is connected with the metering, stirring and heating device; one end of the foaming pipe is connected with the metering, stirring and heating device through an asphalt pump; the water supply module is connected with the middle part of the foaming pipe through a high-pressure pump; and the spraying assembly is arranged in the stirring cylinder and is connected with the other end of the foaming pipe. The utility model has the advantages that the mixed liquid can be ensured to be uniformly mixed and wrapped with the regenerated mixture in the stirring cylinder, so that the additive can be fully utilized in the stirring cylinder, and the maximum efficiency of the additive can be exerted.

Description

[Technical Field]

[0001] This utility model relates to the technical field of asphalt recycling equipment, and in particular to an additive asphalt foaming device. [Background Technology]

[0002] With increasingly stringent environmental protection requirements, competition in the asphalt industry is becoming increasingly fierce. In the process of recycling aged asphalt mixtures, various additives, such as recycling additives and liquid modifiers, need to be added during asphalt mixing. Adding a certain proportion of additives can adjust the road performance of asphalt pavements, which requires optimization of equipment or production processes to ensure that the mixture meets quality requirements.

[0003] In actual production, the higher the proportion of various additives added, the higher the cost. This necessitates that mixing equipment can better utilize the limited amount of additives in the mixture to maximize its efficiency and achieve the highest cost-effectiveness. However, existing mixing equipment typically pumps the metered additives directly into the mixing tank. Since the amount of additives added is generally small (usually about 0.3% of the asphalt content), concentrated spraying of additives is likely to occur upon entering the mixing tank, making it difficult to achieve maximum efficiency within the predetermined mixing cycle. In view of the above-mentioned problems, the inventors of this invention conducted in-depth research on this issue, resulting in this invention. [Utility Model Content]

[0004] The technical problem to be solved by this utility model is to provide an additive asphalt foaming device, which solves the problem that existing mixing equipment is prone to concentrated spraying of additives, making it difficult to maximize the effectiveness of the additives within the predetermined mixing cycle.

[0005] This utility model is implemented as follows: an additive asphalt foaming device, comprising:

[0006] Metering, stirring, and heating device;

[0007] An additive weighing scale, which is connected to a weighing, stirring and heating device;

[0008] An asphalt weighing scale, wherein the asphalt weighing scale is connected to a weighing, mixing and heating device;

[0009] A foaming tube, one end of which is connected to a metering, mixing, and heating device via an asphalt pump;

[0010] A water supply module, wherein the water supply module is connected to the middle of the foaming pipe via a high-pressure pump;

[0011] A spraying assembly is installed inside the mixing tank, and the spraying assembly is connected to the other end of the foaming tube.

[0012] Furthermore, the spraying assembly includes several spraying pipes disposed inside the mixing tank, and several mixed liquid nozzles are evenly distributed at the bottom of the spraying pipes.

[0013] Furthermore, the mixture nozzle is a spiral nozzle that sprays in a fan shape.

[0014] Furthermore, the metering, stirring, and heating device includes a main cylinder, a stirring assembly disposed within the main cylinder, a drive mechanism for driving the stirring assembly, a weighing sensor disposed on the main cylinder, and a heating pipe disposed within the main cylinder; the bottom of the main cylinder has an inverted conical structure, the asphalt pump is connected to the bottom of the inverted conical structure, and the heating pipe is disposed near the inverted conical structure.

[0015] Furthermore, temperature sensors are provided at both the upper and lower parts of the main cylinder.

[0016] Furthermore, the foaming tube has a straightener plate at one end near the asphalt pump to form an asphalt film from the asphalt mixture.

[0017] Furthermore, the foaming tube has a spiral blade rotatably mounted at one end near the spraying assembly.

[0018] Furthermore, high-pressure water nozzles extending into the foaming tube are provided on both sides of the middle section of the foaming tube, and each high-pressure water nozzle is connected to a high-pressure pump through a water pipe.

[0019] Furthermore, a rectifier hole is provided in the middle of the rectifier plate. The rectifier hole is formed by arc-shaped protrusions extending inward on both sides of a circular hole, and a gap is left between the arc-shaped protrusions on both sides.

[0020] By adopting the technical solution of this utility model, at least the following beneficial effects are achieved: After separately metering the additives and asphalt, they are fed into a metering, mixing, and heating device for mixing and heating, ensuring thorough mixing and fusion of the additives and asphalt. Simultaneously, a foaming tube is installed before the mixing tank, where the heated high-temperature mixture first forms a high-temperature asphalt film. This film then collides instantaneously with high-pressure water sprayed from both sides of the tube, forming small water droplets. The temperature difference causes the mixture to instantly foam, forming micro-foam, thereby reducing the viscosity of the mixture and ensuring that the additives are well mixed within the asphalt micro-foam. Finally, a spraying assembly evenly sprays the mixture onto the recycled mixture in the mixing tank. Because the treated mixture not only has low viscosity and strong adhesion, but also uniformly disperses the additives, it ensures better uniform mixing and adhesion with the recycled mixture in the mixing tank, allowing the additives to be fully utilized and maximizing their effectiveness. [Attached Image Description]

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a schematic diagram of the overall structure of an additive asphalt foaming device according to this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the foaming tube in this utility model;

[0024] Figure 3 This is a schematic diagram of the rectifier plate in this utility model;

[0025] Figure 4 This is a schematic diagram showing the distribution of the mixing nozzles within the mixing tank in this utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the mixing liquid nozzle in this utility model;

[0027] Figure 6 This is a schematic diagram of the metering stirring and heating device in this utility model.

[0028] Explanation of reference numerals in the attached figures:

[0029] Additive asphalt foaming device 100;

[0030] Metering, stirring and heating device 1, main cylinder 11, inverted conical structure 111, stirring assembly 12, drive mechanism 13, weighing sensor 14, heating tube 15, temperature sensor 16.

[0031] Additive weighing scale 2;

[0032] Asphalt weighing scale 3;

[0033] Foaming tube 4, rectifier plate 41, rectifier hole 411, arc-shaped protrusion 412, spiral blade 42, high-pressure water nozzle 43, water pipe 431;

[0034] Asphalt pump 5;

[0035] Water supply module 6;

[0036] High-pressure pump 7;

[0037] Mixing tank 8;

[0038] Spraying assembly 9, spraying pipe 91, mixed liquid nozzle 92, spiral vane 921.

Detailed Implementation Methods

[0039] To better understand the technical solution of this utility model, the technical solution of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] It should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing these embodiments and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0041] Please see Figures 1 to 6 As shown, this utility model discloses an additive asphalt foaming device 100, which includes:

[0042] The metering, mixing, and heating device 1 mainly performs the following functions: 1. Accurately metering the mass of the liquid entering and exiting the device to better control the addition ratio of the mixture; 2. Mixing the additives and asphalt entering the metering, mixing, and heating device 1 to fully mix the additives and asphalt to obtain a mixture; 3. Heating the mixture to reach the required temperature.

[0043] Additive weighing scale 2 is connected to the metering, stirring and heating device 1; the additive weighing scale 2 is used to accurately measure the additives and send the measured additives into the metering, stirring and heating device 1.

[0044] An asphalt weighing scale 3 is connected to a metering, mixing, and heating device 1; the asphalt weighing scale 3 is used to accurately measure asphalt and send the measured asphalt into the metering, mixing, and heating device 1.

[0045] Foaming tube 4, one end of which is connected to metering and mixing heating device 1 via an asphalt pump 5, so that the mixture in metering and mixing heating device 1 is pumped into foaming tube 4 by asphalt pump 5; foaming tube 4 is used to foam the high-temperature mixture, thereby reducing the viscosity of the mixture and enabling the mixture to be better mixed and coated with recycled mixture.

[0046] Water supply module 6 is connected to the middle of foaming tube 4 via a high-pressure pump 7. In specific implementation of this utility model, the water supply module 6 can be a water tank, pool, etc. During operation, the high-pressure pump 7 draws water from the water supply module 6 and provides high-pressure water to the foaming tube 4.

[0047] A spraying component 9 is installed inside the mixing tank 8. The spraying component 9 is connected to the other end of the foaming tube 4 so that the foamed mixture can be sprayed evenly into the mixing tank 8, so that the additive can be fully utilized in the mixing tank 8 and thus maximize the effectiveness of the additive.

[0048] In some embodiments of this utility model, in order to spray the mixture more evenly into the mixing tank 8 and better exert the maximum effectiveness of the additive, the spraying component 9 includes several spraying pipes 91 disposed in the mixing tank 8, and several mixture nozzles 92 are evenly distributed at the bottom of the spraying pipes 91. The specific number of spraying pipes 91 and mixture nozzles 92 can be set according to actual needs.

[0049] For further details, please refer to the following: Figure 5 As shown, the mixing nozzle 92 is a fan-shaped spiral nozzle, meaning that a spiral blade 921 is provided inside the mixing nozzle 92. When the mixing liquid passes through the mixing nozzle 92, it will produce a spiral effect and be sprayed out in a fan shape. It should be noted that the fan-shaped spiral nozzle is an existing nozzle, and its specific structure and implementation principle are well known to those skilled in the art, so it will not be described in detail here. By using a fan-shaped spiral nozzle, not only can the mixture that forms micro-foam be mixed and blended a second time, but the mixture can also be sprayed more evenly onto the recycled mixture at various positions in the mixing tank 8, thereby ensuring that the mixture can be better mixed and coated with the recycled mixture.

[0050] Please refer to the following embodiments of this utility model. Figure 6 As shown, the metering, stirring, and heating device 1 includes a main cylinder 11, a stirring assembly 12 disposed within the main cylinder 11, a drive mechanism 13 that drives the stirring assembly 12 to operate, a weighing sensor 14 disposed on the main cylinder 11, and a heating tube 15 disposed within the main cylinder 11. The stirring assembly 12 is used to stir and mix the additive and asphalt, the weighing sensor 14 is used to accurately measure the mass of the liquid entering and leaving the system, and the heating tube 15 is used to heat the mixture. The bottom of the main cylinder 11 has an inverted conical structure 111, the asphalt pump 5 is connected to the bottom of the inverted conical structure 111, and the heating tube 15 is located near the inverted conical structure 111.

[0051] This invention forms an inverted conical structure 111 at the bottom of the main cylinder 11 and connects the asphalt pump 5 to the bottom of the inverted conical structure 111, which can better enable the mixed liquid in the main cylinder 11 to be output from the bottom of the main cylinder 11. At the same time, the heating pipe 15 is placed close to the inverted conical structure 111, which can not only achieve better heating effect, but also avoid the heating pipe 15 from interfering with the mixing component 12.

[0052] Furthermore, temperature sensors 16 are provided at both the upper and lower parts of the main cylinder 11. By providing temperature sensors 16 at both the upper and lower parts of the main cylinder 11, the temperatures of the upper and lower parts of the main cylinder 11 can be collected by the two temperature sensors 16 respectively during operation, ensuring that the mixture in the entire main cylinder 11 reaches the same temperature and is uniform after stirring. In specific implementation of this invention, when the temperature difference detected by the upper and lower temperature sensors 16 is less than 2°C, it can be determined that the mixture in the main cylinder 11 is uniformly mixed and at the same temperature.

[0053] In some embodiments of this invention, the foaming pipe 4 has a rectifier 41 at one end near the asphalt pump 5 to form an asphalt film in the asphalt mixture. The rectifier 41 is used to form a high-temperature asphalt film when the high-temperature asphalt mixture passes through it.

[0054] As one specific embodiment of this utility model, please refer to the following: Figure 3 As shown, in order to ensure that the high-temperature asphalt mixture can better form a high-temperature asphalt film when passing through the rectifier plate 41, a rectifier hole 411 is provided in the middle of the rectifier plate 41. The rectifier hole 411 is formed by arc-shaped protrusions 412 extending inward on both sides of a circular hole, and a gap is left between the arc-shaped protrusions 412 on both sides.

[0055] In some embodiments of this invention, a spiral blade 42 is rotatably mounted inside the foaming tube 4 near the spraying assembly 9. During operation, the spiral blade 42 is driven to rotate by the high-pressure water, and during the rotation, the spiral blade 42 can perform preliminary mixing and blending of the mixture that forms microfoam.

[0056] In some embodiments of this invention, high-pressure water nozzles 43 extending into the middle of the foaming tube 4 are provided on both sides of the middle section of the foaming tube 4. Each high-pressure water nozzle 43 is connected to the high-pressure pump 7 via a water pipe 431. During operation, when the high-temperature asphalt mixture passes through the rectifier plate 41 and forms a high-temperature asphalt film, the high-temperature asphalt film will instantly collide with the high-pressure water sprayed from the high-pressure water nozzles 43 on both sides and form small water droplets. At the same time, due to the temperature difference, micro-foam is formed instantaneously, thereby reducing the viscosity of the mixture.

[0057] The overall working principle of the additive asphalt foaming device 100 of this utility model is as follows:

[0058] According to the required mixing ratio, the additives are individually and accurately measured using the additive weighing scale 2, and the asphalt is individually and accurately measured using the asphalt weighing scale 3. The measured additives and asphalt are then sent into the metering, mixing and heating device 1.

[0059] Inside the metering mixing and heating device 1, the driving mechanism 13 drives the mixing component 12 to mix the additives and asphalt, so that the additives and asphalt are blended together to form a mixture. At the same time, the heating tube 15 is energized to heat the mixture to the required temperature. When the temperature sensors 16 at the top and bottom of the main cylinder 11 detect that the temperature of the mixture has reached the required temperature and the temperature difference between the two temperature sensors 16 is less than 2°C, it can be determined that the mixture in the main cylinder 11 is uniformly mixed and at the same temperature. At this time, the mixture is pumped to the foaming tube 4 by the asphalt pump 5.

[0060] While the asphalt pump 5 pumps the mixture, the high-pressure pump 7 draws water from the water supply module 6 and provides high-pressure water to the foaming pipe 4. After passing through the rectifier plate 41 in the foaming pipe 4, the mixture forms a high-temperature asphalt film. Subsequently, the high-temperature asphalt film collides instantaneously with the high-pressure water sprayed from the high-pressure water nozzles 43 on both sides and forms small water droplets. At the same time, due to the temperature difference, it instantly foams to form micro foam. Then, the mixture with micro foam forms passes through the spiral blades 42 in the foaming pipe 4 for preliminary mixing and blending. Finally, the spraying component 9 evenly sprays the mixture into the mixing tank 8, so that the mixture can be better mixed and coated with the recycled mixture in the mixing tank 8.

[0061] In summary, this invention, by separately metering the additives and asphalt and feeding them into the metering, mixing, and heating device 1 for mixing and heating, ensures that the additives and asphalt are fully mixed and blended together. Simultaneously, a foaming tube 4 is installed before the mixing tank 8, and within the foaming tube 4, the heated high-temperature mixture first forms a high-temperature asphalt film. This film then collides instantaneously with the high-pressure water sprayed from the high-pressure water nozzles 43 on both sides, forming small water droplets. The temperature difference causes the mixture to instantly foam, forming micro-foam, thereby reducing the viscosity of the mixture and ensuring that the additives are well mixed within the asphalt micro-foam. Finally, the spraying component 9 evenly sprays the mixture onto the recycled mixture in the mixing tank 8. Because the treated mixture not only has low viscosity and strong adhesion, but also uniformly disperses the additives, it ensures better and more uniform mixing and adhesion with the recycled mixture in the mixing tank 8, allowing the additives to be fully utilized within the mixing tank 8 and maximizing their effectiveness.

[0062] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. An additive asphalt foaming device, characterized in that, include: Metering, stirring, and heating device; An additive weighing scale, which is connected to a weighing, stirring and heating device; An asphalt weighing scale, wherein the asphalt weighing scale is connected to a weighing, mixing and heating device; A foaming tube, one end of which is connected to a metering, mixing, and heating device via an asphalt pump; A water supply module, wherein the water supply module is connected to the middle of the foaming pipe via a high-pressure pump; A spraying assembly is installed inside the mixing tank, and the spraying assembly is connected to the other end of the foaming tube.

2. The additive asphalt foaming device as described in claim 1, characterized in that: The spraying assembly includes several spray pipes located inside the mixing tank, with several mixed liquid nozzles evenly distributed at the bottom of the spray pipes.

3. The additive asphalt foaming device as described in claim 2, characterized in that: The mixture nozzle is a spiral nozzle that sprays in a fan shape.

4. The additive asphalt foaming device as described in claim 1, characterized in that: The metering, mixing, and heating device includes a main cylinder, a mixing assembly located within the main cylinder, a drive mechanism that drives the mixing assembly, a weighing sensor located on the main cylinder, and a heating pipe located within the main cylinder. The bottom of the main cylinder has an inverted conical structure, the asphalt pump is connected to the bottom of the inverted conical structure, and the heating pipe is located near the inverted conical structure.

5. The additive asphalt foaming device as described in claim 4, characterized in that: Temperature sensors are installed at both the upper and lower parts of the main cylinder.

6. The additive asphalt foaming device as described in claim 1, characterized in that: The foaming tube has a straightener at one end near the asphalt pump that helps the asphalt mixture form an asphalt film.

7. The additive asphalt foaming device as described in claim 6, characterized in that: The foaming tube has a spiral blade that is rotatably installed at one end near the spraying component.

8. The additive asphalt foaming device as described in claim 6 or 7, characterized in that: The foaming tube has high-pressure water nozzles extending into it on both sides of the middle section. Each high-pressure water nozzle is connected to a high-pressure pump via a water pipe.

9. The additive asphalt foaming device as described in claim 6, characterized in that: The rectifier plate has a rectifier hole in the middle. The rectifier hole is formed by arc-shaped protrusions extending inward on both sides of a circular hole, and a gap is left between the arc-shaped protrusions on both sides.

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