Asphalt mixture mixing device

Abstract

The invention provides an asphalt mixture mixing device, and relates to the technical field of road pavement. The frame is connected with a stirring tank and a rotating source I for driving the stirring tank to rotate, and the inner side surface of the stirring tank is fixedly connected with a stirring plate for driving an asphalt mixture to rise; a material conveying opening is formed in the side wall of one end of the stirring tank, a material conveying pipe is rotationally connected to the inner side face of the material conveying opening, the material conveying pipe is L-shaped and communicates with the interior of the stirring tank, a second rotating source used for driving the material conveying pipe to rotate is fixedly connected to the frame, and a fire spraying mechanism is arranged at the end, away from the material conveying pipe, of the stirring tank; a third rotating source is fixedly connected to the frame, an output shaft of the third rotating source is fixedly connected with a conveying auger through a rotating shaft, and the conveying auger is arranged in the conveying pipe. The stirring device has the effects of reducing loss of hot air from the interior of the stirring tank and facilitating mixing processing of an asphalt mixture.

Description

Technical Field

[0001] The present invention relates to the technical field of road paving, and in particular to an asphalt mixture mixing device. Background Art

[0002] Asphalt mixture is a black, viscous, cementitious material made from petroleum or natural asphalt. Composed of hydrocarbons and their non-metallic derivatives, it exhibits high viscosity, water resistance, and plasticity. During production, raw materials such as aggregate, asphalt, and mineral powder are fed into a mixing drum. While the materials are stirred, a burner at the other end of the drum heats the mixture, creating the asphalt mixture for paving. This mixture is then applied to the road base and compacted to form a continuous, smooth pavement structure.

[0003] For example, the Chinese patent with the authorization announcement number CN222390185U, named a mobile low-carbon asphalt mixing station, first puts the asphalt into the asphalt heating box, which heats the asphalt to the optimal temperature and transports the heated asphalt to the asphalt mixing tank through the asphalt conveying pipe. Gravel is put into the asphalt mixing tank through the gravel feeding hopper. The stirring shaft stirs the asphalt and gravel inside the asphalt mixing tank through the stirring roller. The igniter ignites the natural gas in the flame head, causing the flame head to spray fire on the inside of the asphalt mixing tank. The flame will heat the asphalt inside the asphalt mixing tank. Finally, the mixed gravel and asphalt mixture will be discharged through the discharge port. The discharged asphalt and gravel mixture will be used for paving roads.

[0004] Regarding the related technologies mentioned above, during the mixing of the asphalt mixture, the natural gas is burned to heat the asphalt mixture inside the mixing tank, and the air inside and outside the mixing tank is circulated through the discharge port to provide oxygen for the combustion of the natural gas inside the mixing tank. However, the discharge port is in an open state at this time, which causes the heat inside the mixing tank to dissipate from the discharge port, which is not conducive to maintaining the heating temperature of the asphalt inside the mixing tank, and may have a negative impact on the production process and quality of the asphalt mixture. Summary of the Invention

[0005] In view of this, the present invention provides an asphalt mixture mixing device, which aims to solve the problem that when the air inside the mixing tank needs to circulate with the outside air through the discharge port, the heat inside the mixing tank is dissipated from the discharge port, which is not conducive to maintaining the heating temperature of the asphalt inside the mixing tank.

[0006] In order to solve the above technical problems, the present invention provides an asphalt mixture mixing device, including a frame; a mixing tank and a rotating source 1 for driving the mixing tank to rotate are connected to the frame, and the inner side surface of the mixing tank is fixedly connected to a stirring plate for driving the asphalt mixture to rise; a feeding port is provided on the side wall of one end of the mixing tank, and a feeding pipe is rotatably connected to the inner side surface of the feeding port, and the feeding pipe is L-shaped and communicates with the interior of the mixing tank; a rotating source 2 for driving the feeding pipe to rotate is fixedly connected to the frame, and a flame-spraying mechanism is provided at one end of the mixing tank away from the feeding pipe; a rotating source 3 is fixedly connected to the frame, and the output shaft of the rotating source 3 is fixedly connected to a feeding auger via a rotating shaft, and the feeding auger is arranged in the feeding pipe.

[0007] By adopting the above technical solution, when loading the mixing tank, the feed pipe is rotated upward to receive the raw materials, and during the heating process, the feed pipe is rotated downward. Since the hot air in the mixing tank has a tendency to move upward, the opening of the feed pipe connecting to the external atmosphere is facing downward, which can reduce the loss of hot air from the mixing tank. At the same time, the setting of the feed auger can extend the path of the hot air flowing along the feed pipe, which can further reduce the loss of hot air, which is beneficial to maintaining the processing temperature in the mixing tank and is beneficial to the mixing process of the asphalt mixture.

[0008] Optionally, an air delivery cavity is provided inside the rotating shaft, an air inlet and an air delivery hole connected to the air delivery cavity are provided on the side wall of the rotating shaft, the air inlet is arranged close to the flame-spraying mechanism, an air delivery groove connected to the air delivery hole is provided on the side wall of the material delivery pipe, an air outlet is provided on the side wall of the material delivery pipe, and the air outlet is respectively connected to the air delivery groove and the inside of the mixing tank.

[0009] By employing this technical solution, the upward flow tendency of hot air is exploited, forcing the hot air inside the feed pipe to flow upward into the mixing tank, further reducing heat loss within the mixing tank. Furthermore, the hot air enters the mixing tank through the air outlet, heating the area of ​​the mixing tank away from the flame mechanism. This improves the uniformity of heat distribution within the mixing tank, ensuring even heating of the asphalt mixture during mixing and maintaining the quality of the asphalt mixture.

[0010] Optionally, a converging plate with a conical side wall is fixedly connected to the outer side surface of the rotating shaft, and the converging plate is arranged at an end of the air inlet away from the flame-spraying mechanism.

[0011] By adopting the above technical solution, the opening of the concentrator is arranged toward the flame spraying mechanism. The concentrator gathers and guides the hot air near the flame spraying mechanism, thereby increasing the amount of hot air entering the air inlet.

[0012] Optionally, the flame-spraying mechanism includes a gas tank fixedly mounted on a vehicle frame, the gas tank being connected to a nozzle via a gas pipe, a control valve being connected in series inside the gas pipe, the nozzle being fixedly connected to the vehicle frame and connected to the interior of the mixing tank, and an igniter being fixedly connected to the nozzle.

[0013] By adopting the above technical solution, the operator opens the control valve to allow the gas in the gas tank to enter the nozzle through the gas pipe, and the igniter is started to ignite the gas, thereby enabling the flame spraying mechanism to heat the asphalt mixture.

[0014] Optionally, a flow guide housing is fixedly sleeved on the outer side surface of the rotating shaft, and a connecting plate is fixedly connected between the flow guide housing and the rotating shaft.

[0015] Optionally, an L-shaped flow guide tube is fixedly connected to the side wall of the flow guide shell, and one end of the flow guide tube extends out of the flow guide shell and is arranged along the radial direction of the stirring tank.

[0016] By adopting the above technical solution, the guide pipe rotates synchronously with the backflow shell. Since the asphalt mixture contacts the inner side of the mixing tank, the hot air flow inside the guide shell is transported radially toward the inner side of the mixing tank, which is beneficial to the heated mixing of the asphalt mixture.

[0017] Optionally, the upper surface of the frame is fixedly connected to a loading hopper through a support rod, the bottom wall of the loading hopper is slidably connected to a loading pipe, the outer side fixed sleeve of the loading pipe is provided with a limiting ring, a return spring is connected between the limiting ring and the loading hopper, the loading pipe can abut against the upper surface of the delivery pipe, and the loading pipe is connected to the interior of the delivery pipe.

[0018] By adopting the above technical solution, when feeding the mixing tank, the feeding pipe flips upward and abuts against the bottom wall of the feeding pipe, pushing the feeding pipe to move upward, preventing the feeding pipe from rotating upward and interfering with the feeding pipe.

[0019] Optionally, the rotation source 1 is fixedly connected to the frame, the output shaft of the rotation source 1 is fixedly sleeved with a driving gear, and the outer side surface of the mixing tank is fixedly connected along the circumferential direction with a plurality of transmission gear teeth that can engage with the driving gear.

[0020] Optionally, the second rotation source is fixedly connected to the vehicle frame, the output shaft fixing sleeve of the second rotation source is provided with a connecting gear, and the outer side fixing sleeve of the feed pipe is provided with a driven gear that can mesh with the connecting gear.

[0021] Optionally, a hydraulic support foot is fixedly connected to the lower bottom surface of the frame.

[0022] In summary, compared with the prior art, the present invention has at least one of the following beneficial technical effects: 1. When loading the mixing tank, the feed pipe is rotated upward to receive the raw materials. During the heating process, the feed pipe is rotated downward. Since the hot air in the mixing tank tends to move upward, the opening of the feed pipe connecting to the external atmosphere is facing downward, which can reduce the loss of hot air from the mixing tank. At the same time, the setting of the feed auger can extend the path of the hot air flowing along the feed pipe, which can further reduce the loss of hot air, help maintain the processing temperature in the mixing tank, and facilitate the mixing process of the asphalt mixture.

[0023] 2. Utilizing the upward flow of hot air, the hot air inside the feed pipe flows upward into the mixing tank, further reducing heat loss within the tank. Furthermore, hot air enters the tank through the air outlet, heating the area away from the flame mechanism. This improves the uniformity of heat distribution within the tank, ensuring even heating of the asphalt mixture during mixing and maintaining its quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 A side view of an embodiment of the present invention; Figure 3 This is a cross-sectional view of the internal structure of a stirring tank according to an embodiment of the present invention; Figure 4 This is a cross-sectional view of the internal structure of the feed pipe according to an embodiment of the present invention; Figure 5 For the embodiment of the present invention Figure 3 A partial enlarged view of the middle area A; Figure 6 It is a schematic structural diagram of the flow guide housing, the flow concentrating plate and the flow guide pipe according to an embodiment of the present invention.

[0025] Explanation of reference numerals: 1, frame; 11, rotating source 1; 111, driving gear; 112, transmission gear; 113, transmission shaft; 114, supporting wheel; 12, rotating source 2; 121, connecting gear; 122, driven gear; 13, rotating source 3; 14, rotating shaft; 141, air delivery cavity; 142, air inlet; 143, air delivery hole; 144, converging plate; 15, feeding auger; 16, support rod; 17, hydraulic Support legs; 2. Mixing tank; 21. Stirring plate; 22. Feed port; 3. Feed pipe; 31. Gas trough; 32. Air outlet; 33. Inner pipe; 34. Outer pipe; 4. Flame-spraying mechanism; 41. Gas storage tank; 42. Gas pipe; 43. Injection nozzle; 44. Control valve; 45. Ignition; 5. Diversion housing; 51. Connecting plate; 52. Diversion pipe; 6. Feeding hopper; 61. Feeding pipe; 62. Limiting ring; 63. Return spring. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be combined with the embodiments of the present invention. Figures 1-6 , clearly and completely describe the technical solutions of the embodiments of the present invention.

[0027] This embodiment provides an asphalt mixture mixing device, referring to Figure 1 、 Figure 2 and Figure 3 An asphalt mixing device includes a frame 1, a mixing tank 2, a stirring plate 21, a feed pipe 3, and a feed auger 15. The bottom of the frame 1 is rotatably connected to wheels, enabling the frame 1 to move when driven by an external towing vehicle. Hydraulic support legs 17 are fixedly connected to the lower surface of the frame 1. The mixing tank 2 is rotatably connected to the upper end of the frame 1. A plurality of stirring plates 21 are arranged in an array along the axial and circumferential directions of the mixing tank 2 and are fixedly connected to the inner side of the mixing tank 2. The stirring plates 21 are arranged at an angle. As the mixing tank 2 rotates, the stirring plates 21 lift the asphalt mixture in the mixing tank 2 upward and drive the asphalt mixture along the axial direction of the mixing tank 2. A rotation source 11 is fixedly connected to the upper surface of the frame 1. A drive gear 111 is fixedly mounted on the output shaft of the rotation source 11. A plurality of transmission gear teeth 112 are fixedly connected to the outer side of the mixing tank 2, which mesh with the drive gear 111. The transmission gear teeth 112 are arranged in an array along the circumference of the mixing tank 2. The output shaft of the rotation source 11 is rotatably connected to the support wheel 114 through the transmission shaft 113. The support wheel 114 abuts against the outer side surface of the mixing tank 2 to support the mixing tank 2.

[0028] Reference Figure 1 and Figure 3 A feed port 22 is provided on the side wall at one end of the mixing tank 2. The inner side of the feed port 22 is rotatably connected to a feed pipe 3. The feed pipe 3 is L-shaped and communicates with the interior of the mixing tank 2. A driven gear 122 is fixedly sleeved on the outer side of the feed pipe 3. A rotating source 2 12 is fixedly connected to the upper surface of the frame 1. The output shaft of the rotating source 2 12 is fixedly sleeved with a connecting gear 121 that can mesh with the driven gear 122. A flame-throwing mechanism 4 is provided at the end of the mixing tank 2 away from the feed pipe 3. The flame-throwing mechanism 4 outputs flames to heat the asphalt mixture in the mixing tank 2. A rotating source 3 13 is fixedly connected to the frame 1. The output shaft of the rotating source 3 13 is fixedly connected to a feed auger 15 via a rotating shaft 14. The feed auger 15 is rotatably arranged in the feed pipe 3.

[0029] When feeding raw materials such as aggregate, asphalt, and mineral powder into the mixing tank 2, the second rotating source 12 drives the feed pipe 3 to rotate about the central axis of the mixing tank 2 through the connecting gear 121 and the driven gear 122, so that the feed pipe 3 is vertically upward away from the opening at one end of the mixing tank 2. The operator uses a forklift to transport the raw materials into the feed pipe 3. The third rotating source 13 is activated, and the output shaft of the third rotating source 13 drives the feed auger 15 to rotate forward through the rotating shaft 14. The feed auger 15 drives the material in the feed pipe 3 into the interior of the mixing tank 2. The flame spraying mechanism 4 is activated to heat the asphalt mixture in the mixing tank 2. The first rotating source 11 is activated, driving the mixing tank 2 to rotate forward through the driving gear 111 and the transmission gear 112. The stirring plate 21 rotates synchronously with the mixing tank 2, stirring the asphalt mixture at the bottom of the mixing tank 2 upward for mixing. At the same time, the tilted stirring plate 21 drives the asphalt mixture to move closer to the flame spraying mechanism 4, which facilitates heating of the asphalt mixture. At this time, the second rotation source 12 drives the feeding pipe 3 to rotate through the connecting gear 121 and the driven gear 122, so that the feeding pipe 3 is away from the opening at one end of the mixing tank 2 and faces downward.

[0030] After the asphalt mixture is stirred, the rotating source 11 is started to drive the mixing tank 2 to reverse through the driving gear 111 and the transmission gear 112. The stirring plate 21 rotates synchronously with the mixing tank 2 to drive the asphalt mixture to move closer to the feed pipe 3. The rotating source 3 13 drives the feed auger 15 to reverse through the rotating shaft 14. Since the opening of the feed pipe 3 away from the flame-spraying mechanism 4 is facing downward at this time, the feed auger 15 drives the asphalt mixture to be output. The operator can use the hopper to receive the asphalt mixture and transport the asphalt mixture to the next workstation.

[0031] When loading the mixing tank 2, the feed pipe 3 is rotated upward to receive the raw materials. During the heating process, the feed pipe 3 is rotated downward. Since the hot air in the mixing tank 2 tends to move upward, the opening of the feed pipe 3 that is connected to the external atmosphere is facing downward, which can reduce the loss of hot air from the mixing tank 2. At the same time, the setting of the feed auger 15 can extend the path of the hot air flowing along the feed pipe 3, which can further reduce the loss of hot air, is beneficial to maintaining the processing temperature in the mixing tank 2, and is beneficial to the mixing process of the asphalt mixture.

[0032] Reference Figure 3 and Figure 4 The upper surface of the frame 1 is fixedly connected to the upper hopper 6 through the support rod 16, and the bottom wall of the upper hopper 6 is slidably connected to the upper hopper 6. The outer side surface of the upper hopper 61 is fixedly sleeved with a limiting ring 62, and a return spring 63 is connected between the limiting ring 62 and the upper hopper 6. The upper hopper 61 can abut against the upper surface of the delivery pipe 3, and the upper hopper 61 is connected to the inside of the delivery pipe 3.

[0033] When feeding the mixing tank 2, the delivery pipe 3 tilts upward and abuts against the bottom wall of the feeding pipe 61, pushing the feeding pipe 61 upward and preventing the delivery pipe 3 from rotating upward and interfering with the feeding pipe 61. At this time, the return spring 63 is compressed, and the delivery pipe 3 is connected to the inside of the feeding pipe 61. When the asphalt mixture is heated, the delivery pipe 3 tilts downward and disengages from the feeding pipe 61, and the return spring 63 pushes the feeding pipe 61 downward to reset it.

[0034] Reference Figure 3 、 Figure 4 and Figure 5 The rotating shaft 14 has an internal air delivery cavity 141, which is arranged axially along the transmission shaft 113. The sidewall of the rotating shaft 14 has an air inlet 142 and an air delivery hole 143, which are located at both ends of the rotating shaft 14 and are both connected to the air delivery cavity 141. The air inlet 142 is located near the flame-spraying mechanism 4, and the air delivery hole 143 is located near the feed pipe 3. The feed pipe 3 includes an outer tube 34 and an inner tube 33, wherein the outer tube 34 is made of a heat-insulating material. The space between the outer tube 34 and the inner tube 33 forms an air delivery groove 31, which is connected to the air delivery hole 143. The sidewall of the feed pipe 3 has an air outlet 32, which is respectively connected to the air delivery groove 31 and the interior of the mixing tank 2.

[0035] The hot air from the rotating shaft 14 near the flame-spraying mechanism 4 can enter the air delivery chamber 141 through the air inlet 142, and then enter the air delivery groove 31 through the air delivery hole 143, heating the inner tube 33 in the feed pipe 3. By utilizing the upward flow tendency of the hot air, the hot air inside the feed pipe 3 flows upward into the mixing tank 2, further reducing the heat loss inside the mixing tank 2. In addition, the hot air enters the mixing tank 2 through the air outlet 32 ​​to heat the mixing tank 2 away from the flame-spraying mechanism 4. Since the stirring plate 21 is transporting the asphalt mixture to the flame-spraying mechanism 4, the asphalt mixture will still be distributed along the axial direction of the mixing tank 2, but the amount of asphalt mixture will gradually decrease in the direction away from the flame-spraying mechanism 4. Therefore, heating the end of the mixing tank 2 away from the flame-spraying mechanism 4 improves the uniformity of the heat distribution inside the mixing tank 2, which is beneficial for uniform heating of the asphalt mixture during the mixing process and for maintaining the quality of the finished asphalt mixture.

[0036] Furthermore, when mixing large quantities of asphalt mixtures in batches, multiple loading and unloading operations are required. Heating the inner tube 33 can preheat the asphalt mixture during the loading process, improving the heating efficiency of the asphalt mixture and reducing the amount of asphalt mixture that adheres to the inner surface of the delivery pipe 3 due to cold during the unloading process. During the unloading process, as the asphalt mixture moves toward the outside of the delivery pipe 3 driven by the delivery auger 15, the asphalt mixture fills the delivery pipe 3, which can close the delivery pipe 3 to a certain extent and reduce heat loss within the mixing tank 2 during the unloading process. When mixing large quantities of asphalt mixtures in batches, the residual heat retained within the mixing tank 2 helps reduce the time required for reheating and improves the efficiency of heating and mixing the asphalt mixture.

[0037] Reference Figure 5 and Figure 6 A conical concentrator 144 is fixedly connected to the outer side of the rotating shaft 14. The concentrator 144 is located at the end of the air inlet 142 away from the flame spraying mechanism 4, with the opening of the concentrator 144 facing the flame spraying mechanism 4. The concentrator 144 converges and guides the hot air near the flame spraying mechanism 4, thereby increasing the amount of hot air entering the air inlet 142.

[0038] Reference Figure 2 and Figure 3 The flame spraying mechanism 4 includes a gas tank 41, a gas pipe 42, a nozzle 43, and an igniter 45. The gas tank 41 and the nozzle 43 are fixedly connected to the upper surface of the vehicle frame 1. The nozzle 43 extends into the interior of the mixing tank 2. The gas tank 41 is filled with gas. The gas pipe 42 is fixedly connected between the gas tank 41 and the nozzle 43. The igniter 45 is fixedly connected to the nozzle 43. A control valve 44 is connected in series with the gas pipe 42. When the operator opens the control valve 44, the gas in the gas tank 41 enters the nozzle 43 through the gas pipe 42. The igniter 45 is activated to ignite the gas, thereby achieving the purpose of the flame spraying mechanism 4 heating the asphalt mixture.

[0039] Reference Figure 2 and Figure 6 The outer side of the rotating shaft 14 is fixedly sleeved with a guide housing 5, and a connecting plate 51 is fixedly connected between the guide housing 5 and the rotating shaft 14. The side wall of the guide housing 5 is tapered to gather the hot air and transport it in the direction of the conveying pipe 3.

[0040] Reference Figure 6The side wall of the flow guide shell 5 is fixedly connected with L-shaped flow guide pipes 52, the flow guide pipes 52 are provided in plurality, the flow guide pipes 52 are uniformly arrayed along the axial direction and the circumferential direction of the flow guide shell 5, one end of the flow guide pipes 52 is communicated with the inside of the flow guide shell 5, and the flow guide pipes 52 extend out of one end of the flow guide shell 5 and are arranged along the radial direction of the stirring tank 2. The flow guide pipes 52 rotate synchronously with the flow guide shell 5, the hot air in the flow guide shell 5 is transported along the radial direction to the inner side of the stirring tank 2 due to the contact between the asphalt mixture and the inner side of the stirring tank 2, which is favorable for the contact between the asphalt mixture and the hot air, thereby being favorable for the effect of heating and mixing of the asphalt mixture.

[0041] The implementation principle of the asphalt mixture mixing device is as follows: when the aggregate, asphalt and mineral powder and other raw materials are input into the stirring tank 2, the feeding pipe 3 rotates to make the opening of the feeding pipe 3 far away from one end of the stirring tank 2 vertically upward, the operator uses the forklift to transport the raw materials into the feeding pipe 3. The feeding auger 15 rotates forward, the feeding auger 15 drives the materials in the feeding pipe 3 to move to the inside of the stirring tank 2. The fire spraying mechanism 4 starts to heat the asphalt mixture in the stirring tank 2. The rotation source one 11 drives the stirring tank 2 to rotate forward, the tilting stirring plate 21 tilts and drives the asphalt mixture to move close to the fire spraying mechanism 4. At this time, the feeding pipe 3 rotates to make the opening of the feeding pipe 3 far away from one end of the stirring tank 2 downward, so as to reduce the heat loss caused by the output of the hot air in the stirring tank 2 from the feeding pipe 3. After the asphalt mixture is stirred, the rotation source one 11 drives the stirring tank 2 to rotate reversely, the tilting stirring plate 21 drives the asphalt mixture to move close to the feeding pipe 3, the feeding auger 15 rotates reversely, and at this time, the opening of the feeding pipe 3 far away from one end of the fire spraying mechanism 4 is downward, at this time, the feeding auger 15 drives the asphalt mixture to output, the operator can use the hopper to receive the asphalt mixture and transport the asphalt mixture to the next station.

[0042] In addition, it should be noted that, in the description of the present application, the terms "mounting", "connecting" and "connecting" should be understood in a broad sense.

[0043] The above is the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principle of the present application, a number of improvements and refinements can be made, which should be considered as the protection scope of the present application.

Claims

1. An asphalt mixture mixing device, comprising a frame (1), characterized in that: The frame (1) is connected to a mixing tank (2) and a rotation source (11) for driving the mixing tank (2) to rotate. The inner side surface of the mixing tank (2) is fixedly connected to a stirring plate (21) for driving the asphalt mixture upward. A feed port (22) is provided on the side wall of one end of the mixing tank (2), and a feed pipe (3) is rotatably connected to the inner side of the feed port (22). The feed pipe (3) is L-shaped and communicates with the interior of the mixing tank (2). A second rotation source (12) for driving the feed pipe (3) to rotate is fixedly connected to the frame (1), and a flame spraying mechanism (4) is provided at one end of the mixing tank (2) away from the feed pipe (3). The frame (1) is fixedly connected to a rotation source three (13), and the output shaft of the rotation source three (13) is fixedly connected to a feed auger (15) via a rotation shaft (14). The feed auger (15) is arranged in the feed pipe (3).

2. The asphalt mixture mixing device according to claim 1, characterized in that: An air delivery cavity (141) is provided inside the rotating shaft (14), and an air inlet (142) and an air delivery hole (143) are provided on the side wall of the rotating shaft (14), which are in communication with the air delivery cavity (141). The air inlet (142) is arranged close to the flame spraying mechanism (4). An air delivery groove (31) in communication with the air delivery hole (143) is provided on the side wall of the material delivery pipe (3), and an air outlet (32) is provided on the side wall of the material delivery pipe (3). The air outlet (32) is respectively in communication with the air delivery groove (31) and the interior of the mixing tank (2).

3. The asphalt mixture mixing device according to claim 2, characterized in that: A flow collecting plate (144) with a conical side wall is fixedly connected to the outer side surface of the rotating shaft (14), and the flow collecting plate (144) is arranged at one end of the air inlet (142) away from the flame spraying mechanism (4).

4. The asphalt mixture mixing device according to claim 3, characterized in that: The flame spraying mechanism (4) comprises a gas storage tank (41) fixedly mounted on the vehicle frame (1); the gas storage tank (41) is connected to a spray head (43) via a gas pipe (42); a control valve (44) is connected in series inside the gas pipe (42); the spray head (43) is fixedly connected to the vehicle frame (1) and is connected to the interior of the mixing tank (2); and an igniter (45) is fixedly connected to the spray head (43).

5. The asphalt mixture mixing device according to claim 4, characterized in that: The outer side surface of the rotating shaft (14) is fixedly sleeved with a flow guide housing (5), and a connecting plate (51) is fixedly connected between the flow guide housing (5) and the rotating shaft (14).

6. The asphalt mixture mixing device according to claim 5, characterized in that: An L-shaped flow guide tube (52) is fixedly connected to the side wall of the flow guide housing (5), and the flow guide tube (52) extends out of one end of the flow guide housing (5) and is arranged along the radial direction of the stirring tank (2).

7. The asphalt mixture mixing device according to claim 4, characterized in that: The upper surface of the vehicle frame (1) is fixedly connected to a loading hopper (6) via a support rod (16); a loading tube (61) is slidably connected to the bottom wall of the loading hopper (6); a limiting ring (62) is fixedly provided on the outer side of the loading tube (61); a return spring (63) is connected between the limiting ring (62) and the loading hopper (6); the loading tube (61) can abut against the upper surface of the delivery tube (3); and the loading tube (61) is communicated with the interior of the delivery tube (3).

8. The asphalt mixture mixing device according to claim 1, characterized in that: The rotation source (11) is fixedly connected to the vehicle frame (1); the output shaft of the rotation source (11) is fixedly sleeved with a driving gear (111); and the outer side surface of the mixing tank (2) is fixedly connected along the circumferential direction with a plurality of transmission gear teeth (112) that can mesh with the driving gear (111).

9. The asphalt mixture mixing device according to claim 1, characterized in that: The second rotation source (12) is fixedly connected to the vehicle frame (1), the output shaft fixing sleeve of the second rotation source (12) is provided with a connecting gear (121), and the outer side fixing sleeve of the feed pipe (3) is provided with a driven gear (122) capable of meshing with the connecting gear (121).

10. The asphalt mixture mixing device according to claim 1, characterized in that: A hydraulic support foot (17) is fixedly connected to the lower bottom surface of the vehicle frame (1).

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