Environment-friendly asphalt heating device

Abstract

The utility model relates to the technical field of asphalt heating, particularly relates to an environmental protection type asphalt heating device, it can improve asphalt heating treatment efficiency, further improve asphalt heating uniformity, including inner jar, the outer jar of setting in the outer wall department of inner jar and heater, the hollow interlayer formed between heater between inner jar and outer jar, still include circulating agitator, circulating agitator includes hollow shaft that rotates and is installed in inner jar, the drive motor that is hollow shaft rotation provides power, with hollow shaft lower part fixed connection's U type pipe frame, the piston that slides up and down is installed in the hollow shaft, and the lifting drive part that provides power for piston up and down sliding, be equipped with hollow passageway with hollow shaft inside communication in U type pipe frame, the first check valve that hollow shaft bottom end is equipped with allowing inner jar bottom asphalt one way to enter to hollow shaft, the top both ends of U type pipe frame are equipped with the second check valve that allows asphalt in hollow passageway from U type pipe frame top one way outflow.

Description

Technical Field

[0001] This utility model relates to the technical field of asphalt heating, and in particular to an environmentally friendly asphalt heating device. Background Technology

[0002] To reduce the viscosity of asphalt and make it sufficiently fluid and workable so that it can be fully and evenly mixed with aggregates, liquid asphalt needs to be heated using a heating device.

[0003] For example, utility model patent application CN206570642U discloses an integrated heating and shearing device for asphalt, comprising a tank, a power unit, a power shaft connected to the power unit, and a mixing device and a shearing device mounted on the power shaft. Both the mixing and shearing devices are located inside the tank. A heat-conducting pipe is also coiled at the bottom of the tank, and a heating device is connected to the outside of the heat-conducting pipe. This device saves a significant amount of time and improves production efficiency. Adding a heat-conducting pipe inside the tank helps maintain the temperature of the asphalt within the tank, further enhancing production efficiency.

[0004] However, the above-mentioned device still has the following drawbacks: when the asphalt is heated, the viscosity of the asphalt is high, the resistance of the stirring device is large, the rotation speed is difficult to increase, and the heating efficiency of the asphalt needs to be further improved. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an environmentally friendly asphalt heating device that improves the efficiency of asphalt heat treatment and further enhances the uniformity of asphalt heating.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an environmentally friendly asphalt heating device, comprising an inner tank, an outer tank sleeved on the outer wall of the inner tank, and a heater, wherein the heater is located within a hollow interlayer formed between the inner tank and the outer tank; further comprising a circulating agitator, the circulating agitator comprising a hollow shaft rotatably installed within the inner tank, a drive motor providing power for the rotation of the hollow shaft, a U-shaped tube frame fixedly connected to the lower part of the hollow shaft, a piston slidably installed vertically within the hollow shaft, and a lifting drive component providing power for the vertical sliding of the piston; the U-shaped tube frame has a hollow passage communicating with the interior of the hollow shaft, the top two ends of the U-shaped tube frame extending towards the upper edge of the inner tank; the bottom end of the hollow shaft is provided with a first one-way valve allowing asphalt from the bottom of the inner tank to enter the hollow shaft in one direction; the top two ends of the U-shaped tube frame are provided with one-way valves allowing asphalt in the hollow passage to flow from the top of the U-shaped tube frame in one direction. The second one-way valve flows out; furthermore, the central axes of the hollow shaft, inner tank, and outer tank coincide; the drive motor is preferably a geared motor; both the first and second one-way valves are preferably spring-type one-way valves, but gravity-type one-way valves or similar one-way valves can also be used; the lifting drive is preferably an electric telescopic cylinder, which is fixedly installed on the top of the inner tank, and the output end of the electric telescopic cylinder is fixedly connected to the piston; the lifting drive can also be other equivalent components that drive the piston to move up and down; the piston is rotatably sealed to the inner wall of the hollow shaft, and wear-resistant rubber rings and other necessary sealing components are provided on the outer wall of the piston; the top of the U-shaped tube frame is higher than the highest liquid level in the inner tank; the heater is preferably an electric heater, which is installed at the bottom of the hollow jacket; multiple cross braces are installed between the U-shaped tube frame and the hollow shaft, and the U-shaped tube frame and the hollow shaft are fixedly connected by the cross braces.

[0007] Preferably, a diffuser plate is rotatably mounted on the top end of the U-shaped tube frame, a toothed ring is provided on the upper part of the inner wall of the inner tank, and teeth that mesh with multiple toothed rings and are evenly distributed circumferentially are provided on the outer wall of the diffuser plate. A diffuser cavity communicating with the hollow passage is provided inside the diffuser plate, and the diffuser cavity is communicating with the inside of the inner tank. Furthermore, the central axis of the diffuser plate coincides with the central axis of the vertical tube on the corresponding U-shaped tube frame. The diffuser plate and the U-shaped tube frame are rotatably sealed by a mechanical shaft seal.

[0008] Preferably, the diffuser disk has multiple circumferentially distributed guide plates inside the diffuser cavity, and a diffuser channel is formed between two adjacent guide plates and the inner wall of the diffuser cavity.

[0009] Preferably, scrapers that contact the inner wall of the inner tank are installed on both the vertical and horizontal pipe walls of the U-shaped pipe rack.

[0010] Preferably, it also includes a first temperature sensor whose detection end extends into the hollow interlayer and a second temperature sensor that extends into the inner tank; the hollow interlayer is filled with a heat-conducting medium; and an oil replenishment tank that communicates with the interior of the hollow interlayer is installed on the upper part of the outer wall of the outer tank.

[0011] Preferably, the inner tank has a feeding port at the top, a cover is hinged to the feeding port, an exhaust pipe communicating with the inside of the inner tank is installed at the top of the inner tank, and an exhaust valve is installed on the exhaust pipe; the output end of the exhaust pipe is connected to an external waste gas treatment device.

[0012] Preferably, the inner tank is provided with a support frame near the feeding port, and an arc-shaped guide plate with its inner wall inclined downwards towards the feeding port is detachably installed on the support frame.

[0013] Preferably, the outer tank is equipped with a discharge pipe that communicates with the bottom of the inner tank, and the discharge pipe is equipped with a discharge valve.

[0014] Compared with the prior art, this utility model provides an environmentally friendly asphalt heating device with the following beneficial effects: This environmentally friendly asphalt heating device heats the inner tank through a heater, raising the temperature inside the tank. Simultaneously, a drive motor rotates the hollow shaft, which in turn rotates the U-shaped tube frame slowly. A lifting drive component moves the piston upwards along the inner wall of the hollow shaft, creating negative pressure inside. The first one-way valve opens, and the second one-way valve closes, drawing the asphalt from the lower center of the inner tank into the hollow shaft. As the lifting drive component moves the piston downwards, the pressure inside the hollow shaft increases, closing the first one-way valve and opening the second one-way valve. The asphalt inside the hollow shaft is then forced out from the top of the U-shaped tube frame. With the rotation of the U-shaped tube frame, the asphalt falls to the upper perimeter of the inner tank. This slow agitation of the asphalt inside the tank promotes circulation from the lower center to the upper perimeter, improving the uniformity of contact between the asphalt and the heat source, increasing the efficiency of asphalt heating, and further enhancing the uniformity of asphalt heating. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a top view schematic diagram of the structure of this utility model; Figure 3 This is the utility model Figure 2 Schematic diagram of the cross-sectional structure at point AA; Figure 4 This is the utility model Figure 3 Schematic diagram of the cross-sectional structure at point BB; Figure 5 This is the utility model Figure 3 Schematic diagram of the cross-sectional structure at the CC section; The attached diagram is labeled as follows: 1. Inner tank; 2. Outer tank; 3. Heater; 4. Hollow shaft; 5. Drive motor; 6. U-shaped tube frame; 7. Piston; 8. Lifting drive component; 9. Hollow passage; 10. First check valve; 11. Second check valve; 12. Diffuser plate; 13. Gear ring; 14. Tooth; 15. Diffuser cavity; 16. Guide plate; 17. Scraper; 18. First temperature sensor; 19. Second temperature sensor; 20. Oil replenishment tank; 21. Feed port; 22. Cover; 23. Exhaust pipe; 24. Exhaust valve; 25. Support frame; 26. Arc-shaped guide plate; 27. Discharge pipe; 28. Discharge valve. Detailed Implementation To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0016] As described in the background art, the integrated heating device for asphalt shearing and mixing has high viscosity during asphalt heating, resulting in high resistance in the mixing device and difficulty in increasing the rotation speed. Therefore, the heating efficiency of asphalt needs to be further improved.

[0017] To solve this technical problem, this utility model provides an environmentally friendly asphalt heating device, which is applied to the heating treatment of asphalt.

[0018] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0019] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0020] Example 1 Please refer to Figure 1-5An environmentally friendly asphalt heating device includes an inner tank 1, an outer tank 2 fitted onto the outer wall of the inner tank 1, and a heater 3. The heater 3 is located within a hollow interlayer formed between the inner tank 1 and the outer tank 2. It also includes a circulating agitator, which comprises a hollow shaft 4 rotatably mounted within the inner tank 1, a drive motor 5 providing power for the rotation of the hollow shaft 4, a U-shaped tube frame 6 fixedly connected to the lower part of the hollow shaft 4, a piston 7 slidably mounted within the hollow shaft 4, and a lifting drive component 8 providing power for the sliding of the piston 7. The U-shaped tube frame 6 has a hollow passage 9 communicating with the interior of the hollow shaft 4. The top two ends of the U-shaped tube frame 6 extend towards the upper edge of the inner tank 1. The bottom end of the hollow shaft 4 is provided with a first one-way valve 10 allowing asphalt from the bottom of the inner tank 1 to enter the hollow shaft 4 in one direction. The top two ends of the U-shaped tube frame 6 are provided with asphalt from the hollow passage 9 allowing asphalt to flow out unidirectionally from the top of the U-shaped tube frame 6. The second check valve 11; furthermore, the central axes of the hollow shaft 4, the inner tank 1, and the outer tank 2 coincide; the drive motor 5 is preferably a geared motor; the first check valve 10 and the second check valve 11 are both preferably spring-type check valves, but gravity-type check valves or similar check valves can also be used; the lifting drive component 8 is preferably an electric telescopic cylinder, which is fixedly installed on the top of the inner tank 1, and the output end of the electric telescopic cylinder is fixedly connected to the piston 7; the lifting drive component 8 can also be other equivalent components that drive the piston 7 to move up and down; the piston 7 is rotatably sealed to the inner wall of the hollow shaft 4, and the outer wall of the piston 7 is provided with necessary sealing components such as wear-resistant rubber rings; the top of the U-shaped tube frame 6 is higher than the highest liquid level in the inner tank 1; the heater 3 is preferably an electric heater, which is installed at the bottom of the hollow jacket; multiple cross braces are installed between the U-shaped tube frame 6 and the hollow shaft 4, and the U-shaped tube frame 6 and the hollow shaft 4 are fixedly connected by the cross braces.

[0021] For details, please refer to Figure 3 The vertical and horizontal pipe walls of the U-shaped pipe rack 6 are equipped with scrapers 17 that contact the inner wall of the inner tank 1.

[0022] For details, please refer to Figure 3 It also includes a first temperature sensor 18 whose detection end extends into the hollow interlayer and a second temperature sensor 19 that extends into the inner tank 1; the hollow interlayer is filled with a heat-conducting medium; and an oil replenishment tank 20 that communicates with the interior of the hollow interlayer is installed on the upper part of the outer wall of the outer tank 2.

[0023] For details, please refer to Figure 1 The inner tank 1 is provided with a feeding port 21 at the top, and a cover 22 is hinged to the feeding port 21. An exhaust pipe 23 communicating with the inside of the inner tank 1 is installed at the top of the inner tank 1, and an exhaust valve 24 is installed on the exhaust pipe 23. The output end of the exhaust pipe 23 is connected to an external waste gas treatment device.

[0024] For details, please refer to Figure 1 or Figure 2The inner tank 1 is provided with a support frame 25 near the feed port 21. An arc-shaped guide plate 26 with an inner wall inclined downward to the side of the feed port 21 is detachably installed on the support frame 25. Furthermore, the arc-shaped guide plate 26 is provided with a socket, and the support frame 25 is inserted into the socket so that the arc-shaped guide plate 26 can be removed from the support frame 25.

[0025] For details, please refer to Figure 1 and Figure 5 The outer tank 2 is equipped with a discharge pipe 27 that communicates with the bottom of the inner tank 1, and a discharge valve 28 is installed on the discharge pipe 27.

[0026] The environmentally friendly asphalt heating device provided in this embodiment uses a U-shaped tube frame 6 that rotates to move a scraper 17. The scraper 17 can scrape off the asphalt adhering to the inner wall of the inner tank 1, preventing excessive asphalt adhesion. It should be noted that before the device is shut down, the inside of the inner tank 1, the hollow shaft 4, and the hollow passage 9 must be cleaned with a cleaning solution to prevent asphalt from hardening and affecting the next use of the equipment. The heat transfer medium can more evenly transfer heat from the heater 3 to the inner tank 1, preventing excessively high local temperatures and improving the heating uniformity of the asphalt inside the inner tank 1. The first temperature sensor 18 and the second temperature sensor 19 are connected to an external display or controller, allowing real-time monitoring of the temperature inside the hollow interlayer and the temperature inside the inner tank 1, respectively. When the temperature is too high, it can be detected and responded to in time. During the heating of asphalt, the feeding port 21 is closed by the cover 22 and the exhaust valve 24 is opened. The exhaust gas generated during the heating of asphalt is discharged to the external exhaust gas treatment equipment through the exhaust pipe 23, avoiding the direct emission of exhaust gas to the external environment, which is more environmentally friendly. When feeding asphalt, the arc-shaped guide plate 16 can receive and guide the asphalt to reduce the dripping of asphalt onto the upper part of the inner tank 1, and improve the convenience of feeding asphalt. When not in use, the arc-shaped guide plate 26 can be removed from the support frame 25. After the asphalt is heated, the discharge valve 28 is opened. Under gravity, the asphalt is discharged from the discharge pipe 27. During the discharge process, the U-shaped pipe frame 6 is in a rotating state. The scraper 17 scrapes the asphalt in the inner tank 1 in sync with the rotation of the U-shaped pipe frame 6 to reduce the asphalt residue in the inner tank 1.

[0027] Example 2 The environmentally friendly asphalt heating device provided in Example 1 has been further optimized. For details, please refer to [link / reference needed]. Figure 3 and Figure 4A diffuser plate 12 is rotatably mounted on the top end of the U-shaped tube frame 6. A toothed ring 13 is provided on the upper part of the inner wall of the inner tank 1. The outer wall of the diffuser plate 12 is provided with teeth 14 that mesh with multiple toothed rings 13 and are evenly distributed circumferentially. The diffuser plate 12 is provided with a diffuser cavity 15 that communicates with the hollow passage 9. The diffuser cavity 15 is connected to the inside of the inner tank 1. Furthermore, the central axis of the diffuser plate 12 coincides with the central axis of the vertical tube on the corresponding U-shaped tube frame 6. The rotational speed of the diffuser plate 12 is 2-5 times that of the U-shaped tube frame 6. The rotational speed of the diffuser plate 12 can be adjusted by adjusting the transmission ratio between the toothed rings 13 and the teeth 14 on the outer wall of the diffuser plate 12.

[0028] For details, please refer to Figure 4 The diffuser plate 12 has multiple circumferentially distributed guide plates 16 inside the diffuser cavity 15, and a diffuser channel is formed between two adjacent guide plates 16 and the inner wall of the diffuser cavity 15.

[0029] In the environmentally friendly asphalt heating device provided in this embodiment, during the rotation of the U-shaped tube frame 6, the teeth 14 on the diffuser plate 12 mesh with the toothed ring 13, and the diffuser plate 12 rotates. The rotation speed of the diffuser plate 12 is greater than that of the U-shaped tube frame 6. The centrifugal force generated during the rotation of the diffuser plate 12 can accelerate the discharge of asphalt entering the diffuser cavity 15, thereby improving the smoothness of material discharge at the top of the U-shaped tube frame 6. At the same time, the asphalt thrown out by the diffuser plate 12 is further dispersed into the inner tank 1, further improving the mixing uniformity and temperature uniformity of the asphalt in the inner tank 1. Under the action of the guide plate 16, the asphalt in the diffuser cavity 15 can be more easily thrown out, reducing the risk of the top port of the U-shaped tube frame 6 being blocked by asphalt due to the decrease in asphalt outflow pressure. At the same time, it has a shearing and agitating effect on the asphalt flowing through the diffuser cavity 15, thereby improving the flow performance of the asphalt.

[0030] The environmentally friendly asphalt heating device provided by this utility model is used as follows: Asphalt is fed into the inner tank 1 through the feeding port 21, and the cover 22 is closed; the heater 3 heats the heat-conducting medium in the hollow jacket, which in turn heats the inner tank 1, causing the temperature inside the inner tank 1 to rise. At the same time, the drive motor 5 drives the hollow shaft 4 to rotate, and the hollow shaft 4 drives the U-shaped tube frame 6 to rotate slowly. Meanwhile, the lifting drive component 8 drives the piston 7 to move upward along the inner wall of the hollow shaft 4, generating negative pressure inside the hollow shaft 4. The first one-way valve 10 opens, and the second one-way valve 11 closes, causing the asphalt in the lower middle part of the inner tank 1 to be drawn into the hollow shaft 4. As the lifting drive 8 moves the piston 7 downward, the pressure inside the hollow shaft 4 increases. The first one-way valve 10 closes, and the second one-way valve 11 opens. The asphalt inside the hollow shaft 4 is forced from the top of the U-shaped tube frame 6 into the diffuser chamber 15. The diffuser plate 12 rotates during the rotation of the U-shaped tube frame 6. Under the action of centrifugal force, the asphalt in the diffuser chamber 15 is thrown out through the diffuser channel. As the U-shaped tube frame 6 rotates, the asphalt falls to the upper periphery of the inner tank 1. While slowly stirring the asphalt in the inner tank 1, it can promote the circulation of the asphalt in the inner tank 1 from the lower center to the upper periphery, thereby achieving uniform heating of the asphalt in the inner tank 1.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. An environmentally friendly asphalt heating device, comprising an inner tank (1), an outer tank (2) fitted onto the outer wall of the inner tank (1), and a heater (3), wherein the heater (3) is located within a hollow interlayer formed between the inner tank (1) and the outer tank (2); characterized in that, It also includes a circulating agitator, which includes a hollow shaft (4) rotatably installed in the inner tank (1), a drive motor (5) that provides power for the rotation of the hollow shaft (4), a U-shaped tube frame (6) fixedly connected to the lower part of the hollow shaft (4), a piston (7) slidably installed in the hollow shaft (4), and a lifting drive component (8) that provides power for the piston (7) to slide up and down. The U-shaped tube frame (6) is provided with a hollow passage (9) that communicates with the interior of the hollow shaft (4). The top two ends of the U-shaped tube frame (6) extend to the upper edge of the inner tank (1). The bottom end of the hollow shaft (4) is provided with a first one-way valve (10) that allows the asphalt at the bottom of the inner tank (1) to enter the hollow shaft (4) in one direction. The top two ends of the U-shaped tube frame (6) are provided with a second one-way valve (11) that allows the asphalt in the hollow passage (9) to flow out from the top of the U-shaped tube frame (6) in one direction.

2. The environmentally friendly asphalt heating device according to claim 1, characterized in that, The top end of the U-shaped tube frame (6) is rotatably mounted with a diffuser plate (12). The upper part of the inner wall of the inner tank (1) is provided with a toothed ring (13). The outer wall of the diffuser plate (12) is provided with teeth (14) that mesh with multiple toothed rings (13) and are evenly distributed in the circumference. The diffuser plate (12) is provided with a diffuser cavity (15) that communicates with the hollow passage (9). The diffuser cavity (15) communicates with the inside of the inner tank (1).

3. The environmentally friendly asphalt heating device according to claim 2, characterized in that, The diffuser plate (12) has multiple circumferentially distributed guide plates (16) in the diffuser cavity (15), and a diffuser channel is formed between two adjacent guide plates (16) and the inner wall of the diffuser cavity (15).

4. The environmentally friendly asphalt heating device according to claim 1 or 3, characterized in that, The U-shaped tube frame (6) is equipped with scrapers (17) that contact the inner wall of the inner tank (1) on both the vertical and horizontal tube walls.

5. The environmentally friendly asphalt heating device according to claim 4, characterized in that, It also includes a first temperature sensor (18) whose detection end extends into the hollow interlayer and a second temperature sensor (19) that extends into the inner tank (1); the hollow interlayer is filled with a heat-conducting medium; and an oil replenishment tank (20) that communicates with the interior of the hollow interlayer is installed on the upper part of the outer wall of the outer tank (2).

6. The environmentally friendly asphalt heating device according to claim 5, characterized in that, The inner tank (1) is provided with a feeding port (21) at the top, and a cover (22) is hinged to the feeding port (21). An exhaust pipe (23) communicating with the inside of the inner tank (1) is installed at the top of the inner tank (1), and an exhaust valve (24) is installed on the exhaust pipe (23). The output end of the exhaust pipe (23) is connected to an external waste gas treatment device.

7. The environmentally friendly asphalt heating device according to claim 6, characterized in that, The inner tank (1) is provided with a support frame (25) near the feed port (21), and an arc-shaped guide plate (26) with its inner wall inclined downwards towards the feed port (21) is detachably installed on the support frame (25).

8. The environmentally friendly asphalt heating device according to claim 7, characterized in that, The outer tank (2) is equipped with a discharge pipe (27) that communicates with the bottom of the inner tank (1), and a discharge valve (28) is installed on the discharge pipe (27).

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