An asphalt mixture mixing plant

Abstract

The present application provides a kind of asphalt mixture mixing device, it is related to road pavement technical field, comprising: frame;Frame is connected with stirring tank and is used to drive stirring tank rotation source one self-rotation, the inside surface of stirring tank is fixedly connected with be used for driving asphalt mixture to lift and stir board;The side wall of stirring tank one end is equipped with material conveying port, the inside surface of material conveying port is rotatably connected with material conveying pipe, material conveying pipe is L-shaped, material conveying pipe is communicated with stirring tank inside, frame is fixedly connected with rotation source two for driving material conveying pipe rotation, the end of stirring tank away from material conveying pipe is equipped with fire spraying mechanism;Frame is fixedly connected with rotation source three, the output shaft of rotation source three is fixedly connected with material conveying auger through rotating shaft, material conveying auger is arranged in material conveying pipe.The present application has the effect of reducing hot air from stirring tank loss, is conducive to the mixing processing of asphalt mixture.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of road paving, in particular to a kind of asphalt mixture mixing device. BACKGROUND

[0002] Asphalt mixture is a black viscous cementing material made of petroleum or natural asphalt as raw material, composed of hydrocarbons and non-metallic derivatives, with high viscosity, waterproof and plasticity. In the production process, the aggregate, asphalt and mineral powder and other raw materials are transported to the stirring barrel, the material in the stirring barrel is stirred, and the burner at the other end of the stirring barrel heats the internal mixture to form paving asphalt mixture. The asphalt mixture is laid on the road base and forms a continuous and smooth pavement structure after compaction.

[0003] For example, a mobile low-carbon asphalt mixing station with publication number CN222390185U, named a mobile low-carbon asphalt mixing station, first puts asphalt into the asphalt heating box, the asphalt heating box heats the asphalt to the best temperature, and the heated asphalt is transported to the asphalt mixing tank through the asphalt conveying pipe. The stone is put into the asphalt mixing tank through the stone feeding hopper, the stirring shaft stirs the asphalt and stone in the asphalt mixing tank through the stirring roller, the igniter ignites the natural gas in the flame head, the flame head sprays the inside of the asphalt mixing tank, the flame heats the asphalt in the asphalt mixing tank, and finally the mixed stone and asphalt mixture is discharged through the discharge port. The discharged asphalt and stone mixture is used for paving.

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

[0005] Therefore, the present application provides an asphalt mixture mixing device to solve the problem of heat loss from the discharge port of the stirring tank, which is not conducive to maintaining the heating temperature of the asphalt in the stirring tank.

[0006] To solve the above technical problems, the present application provides a kind of asphalt mixture mixing device, including frame;The frame is connected with stirring tank and is used to drive stirring tank rotation source one, the inner side of the stirring tank is fixedly connected with the stirring plate for driving asphalt mixture to rise;The side wall of the stirring tank one end is equipped with feed port, the inner side of feed port is rotatably connected with feed pipe, the feed pipe is L-shaped, the feed pipe is communicated with the inside of stirring tank, the frame is fixedly connected with rotation source two for driving feed pipe rotation, the end of the stirring tank away from feed pipe is equipped with fire spraying mechanism;The frame is fixedly connected with rotation source three, the output shaft of rotation source three is fixedly connected with feed auger through rotating shaft, and the feed auger is arranged in the feed pipe.

[0007] By adopting the above technical scheme, when the stirring tank is loaded, the feed pipe is rotated upward to receive raw materials, and during heating, the feed pipe is rotated downward. Since the hot air in the stirring tank has a tendency to move upward, the opening of the feed pipe communicated with the external atmosphere downward can reduce the loss of hot air from the stirring tank. Meanwhile, the arrangement of the feed auger can prolong the path of the hot air flowing along the feed pipe, further reducing the loss of hot air, which is conducive to maintaining the processing temperature in the stirring tank and facilitating the mixing processing of asphalt mixture.

[0008] Optionally, the rotating shaft is internally provided with a gas conveying cavity, the rotating shaft is provided with an air inlet hole and a gas conveying hole communicated with the gas conveying cavity, the air inlet hole is arranged close to the fire spraying mechanism, the side wall of the feed pipe is provided with a gas conveying groove communicated with the gas conveying hole, and the side wall of the feed pipe is provided with an air outlet hole communicated with the gas conveying groove and the inside of the stirring tank.

[0009] By adopting the above technical scheme, the hot air in the feed pipe flows upward into the stirring tank by utilizing the upward flow tendency of the hot air, further reducing the heat loss in the stirring tank. In addition, the hot air enters the stirring tank through the air outlet hole to heat the stirring tank far away from the fire spraying mechanism. The uniformity of heat distribution in the stirring tank is improved, which is conducive to uniform heating of the asphalt mixture during mixing and maintaining the quality of the asphalt mixture.

[0010] Optionally, the outer side of the rotating shaft is fixedly connected with a flow converging plate with a tapered side wall, and the flow converging plate is arranged at the end of the air inlet hole away from the fire spraying mechanism.

[0011] By adopting the above technical scheme, the opening of the flow converging plate is arranged towards the fire spraying mechanism. The flow converging plate converges and guides the hot air close to the fire spraying mechanism, increasing the amount of hot air entering the air inlet hole.

[0012] Optionally, the fire spraying mechanism comprises a gas storage tank fixedly arranged on the vehicle frame, the gas storage tank is communicated with a gas spraying head through a gas conveying pipe, a control valve is arranged in the gas conveying pipe, the gas spraying head is fixedly connected with the vehicle frame and the gas spraying head is communicated with the inside of the stirring tank, and a lighter is fixedly connected on the gas spraying head.

[0013] By adopting the above technical scheme, the operator opens the control valve to make the gas in the gas storage tank enter the gas spraying head through the gas conveying pipe, and the lighter starts to ignite the gas, so that the fire spraying mechanism heats the asphalt mixture.

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

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

[0016] By adopting the above technical scheme, the flow guide pipe rotates synchronously with the flow guide shell, and since the asphalt mixture is in contact with the inner side of the stirring tank, the hot gas flow in the flow guide shell is conveyed along the radial direction to the inner side of the stirring tank, which is beneficial to the heating and mixing of the asphalt mixture.

[0017] Optionally, an upper hopper is fixedly connected to the upper surface of the vehicle frame through a support rod, a bottom wall of the upper hopper is slidingly connected with an upper feeding pipe, a limiting ring is fixedly arranged on the outer side of the upper feeding pipe, a return spring is connected between the limiting ring and the upper hopper, the upper feeding pipe can abut against the upper surface of the feeding pipe, and the inside of the upper feeding pipe is communicated with the inside of the feeding pipe.

[0018] By adopting the above technical scheme, when the stirring tank is fed, the feeding pipe is turned upward to abut against the bottom wall of the upper feeding pipe, and the upper feeding pipe is pushed to move upward, so that the feeding pipe is prevented from rotating upward and interfering with the upper feeding pipe.

[0019] Optionally, the first rotating source is fixedly connected to the vehicle frame, a drive gear is fixedly arranged on the output shaft of the first rotating source, and a plurality of transmission gear teeth which can mesh with the drive gear are fixedly arranged on the outer side of the stirring tank in the circumferential direction.

[0020] Optionally, the second rotating source is fixedly connected to the vehicle frame, a connecting gear is fixedly arranged on the output shaft of the second rotating source, and a driven gear which can mesh with the connecting gear is fixedly arranged on the outer side of the feeding pipe.

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

[0022] In summary, compared with the prior art, the present application has at least one of the following beneficial technical effects:

[0023] 1. When feeding materials into the mixing tank, rotate the conveying pipe upward to receive the raw materials. During the heating process, rotate the conveying pipe downward. Since the hot air inside the mixing tank tends to move upward, the downward orientation of the opening of the conveying pipe connecting to the outside atmosphere can reduce the loss of hot air from the mixing tank. At the same time, the setting of the conveying auger can extend the path of hot air along the conveying pipe, which can further reduce the loss of hot air. This is beneficial to maintaining the processing temperature inside the mixing tank and is conducive to the mixing and processing of asphalt mixture.

[0024] 2. Utilizing the upward flow of hot air, the hot air inside the conveying pipe flows upward into the mixing tank, further reducing heat loss within the tank. Additionally, hot air enters the mixing tank through the vent to heat areas of the tank away from the flame-emitting mechanism. This improves the uniformity of heat distribution within the mixing tank, ensuring even heating of the asphalt mixture during mixing and helping to maintain its quality. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0026] Figure 2 This is a side view of an embodiment of the present invention;

[0027] Figure 3 This is a cross-sectional view of the internal structure of the mixing tank according to an embodiment of the present invention;

[0028] Figure 4 This is a cross-sectional view of the internal structure of the feed pipe according to an embodiment of the present invention;

[0029] Figure 5 This is an embodiment of the present invention. Figure 3 A magnified view of a portion of region A in the middle;

[0030] Figure 6 This is a schematic diagram of the flow guide shell, flow convergence plate, and flow guide tube according to an embodiment of the present invention.

[0031] Explanation of reference numerals in the attached drawings: 1. Frame; 11. Rotation source one; 111. Drive gear; 112. Transmission gear tooth; 113. Transmission shaft; 114. Support wheel; 12. Rotation source two; 121. Connecting gear; 122. Driven gear; 13. Rotation source three; 14. Rotation shaft; 141. Air supply chamber; 142. Air inlet; 143. Air supply port; 144. Concentrating plate; 15. Conveying auger; 16. Support rod; 17. Hydraulic system 1. Support foot; 2. Mixing tank; 21. Tumbling plate; 22. Feeding port; 3. Feeding pipe; 31. Air supply trough; 32. Air outlet; 33. Inner pipe; 34. Outer pipe; 4. Flame-emitting mechanism; 41. Air storage tank; 42. Air supply pipe; 43. Jet nozzle; 44. Control valve; 45. Igniter; 5. Guide shell; 51. Connecting plate; 52. Guide pipe; 6. Feeding hopper; 61. Feeding pipe; 62. Limiting ring; 63. Return spring. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will be described in conjunction with the embodiments of the present invention. Figures 1-6 The technical solutions of the embodiments of the present invention will be clearly and completely described.

[0033] This embodiment provides an asphalt mixture mixing device, referring to... Figure 1 , Figure 2 and Figure 3 An asphalt mixture mixing device includes a frame 1, a mixing tank 2, a stirring plate 21, a conveying pipe 3, and a conveying auger 15. Wheels are rotatably connected to the bottom of the frame 1, allowing it to move under the influence of an external towing vehicle. Hydraulic support feet 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. Multiple stirring plates 21 are arranged in an axial and circumferential array along the mixing tank 2 and are fixedly connected to the inner side of the mixing tank 2. The stirring plates 21 are inclined, and as the mixing tank 2 rotates, they lift the asphalt mixture inside the mixing tank 2 upwards while simultaneously driving the asphalt mixture to move axially along 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. Multiple transmission gears 112 that mesh with the drive gear 111 are fixedly connected to the outer side of the mixing tank 2. The transmission gears 112 are arranged in an array along the circumference of the mixing tank 2. The output shaft of the rotating source 11 is rotatably connected to a support wheel 114 via a transmission shaft 113. The support wheel 114 abuts against the outer side of the mixing tank 2 to support the mixing tank 2.

[0034] Reference Figure 1 and Figure 3The side wall of one end of the stirring tank 2 is provided with a feeding port 22, the inner side of the feeding port 22 is rotatably connected with a feeding pipe 3, the feeding pipe 3 is L-shaped, and the feeding pipe 3 is in communication with the inside of the stirring tank 2. The outer side of the feeding pipe 3 is fixedly sleeved with a driven gear 122, the upper surface of the frame 1 is fixedly connected with a rotating source two 12, the output shaft of the rotating source two 12 is fixedly sleeved with a connecting gear 121 which can mesh with the driven gear 122. The stirring tank 2 is provided with a flame spraying mechanism 4 at the end away from the feeding pipe 3, and the output flame of the flame spraying mechanism 4 is used to heat the asphalt mixture in the stirring tank 2. The frame 1 is fixedly connected with a rotating source three 13, the output shaft of the rotating source three 13 is fixedly connected with a feeding auger 15 through a rotating shaft 14, and the feeding auger 15 is rotatably arranged in the feeding pipe 3.

[0035] When the raw materials such as aggregates, asphalt and mineral powder are input into the stirring tank 2, the rotating source two 12 drives the feeding pipe 3 to rotate around the central axis of the stirring tank 2 through the connecting gear 121 and the driven gear 122, so that the opening at the end of the feeding pipe 3 away from the stirring tank 2 is vertically upward, and the operator can use the forklift to transport the raw materials into the feeding pipe 3. The rotating source three 13 is started, the output shaft of the rotating source three 13 drives the feeding auger 15 to rotate in the forward direction through the rotating shaft 14, and the feeding auger 15 drives the materials in the feeding pipe 3 to move towards the inside of the stirring tank 2. The flame spraying mechanism 4 is started to heat the asphalt mixture in the stirring tank 2. The rotating source one 11 is started to drive the stirring tank 2 to rotate in the forward direction through the driving gear 111 and the transmission gear 112, the tilting stirring plate 21 rotates synchronously with the stirring tank 2 to stir the asphalt mixture at the bottom of the stirring tank 2 upwards, and the tilting stirring plate 21 drives the asphalt mixture to move close to the flame spraying mechanism 4, which is conducive to heating the asphalt mixture. At this time, the rotating source two 12 drives the feeding pipe 3 to rotate through the connecting gear 121 and the driven gear 122, so that the opening at the end of the feeding pipe 3 away from the stirring tank 2 is downward.

[0036] After the asphalt mixture is stirred, the rotating source one 11 is started to drive the stirring tank 2 to rotate in the reverse direction through the driving gear 111 and the transmission gear 112, the tilting stirring plate 21 rotates synchronously with the stirring tank 2 to drive the asphalt mixture to move close to the feeding pipe 3, the rotating source three 13 drives the feeding auger 15 to rotate in the reverse direction through the rotating shaft 14, and since the opening at the end of the feeding pipe 3 away from the flame spraying mechanism 4 is downward at this time, the feeding auger 15 drives the asphalt mixture to be output, and the operator can use the hopper to receive the asphalt mixture and transport the asphalt mixture to the next station.

[0037] When the stirring tank 2 is loaded, the feeding pipe 3 is turned upward to receive raw materials, and during heating, the feeding pipe 3 is turned downward. Since the hot air in the stirring tank 2 has a tendency to move upward, the opening of the feeding pipe 3 communicating with the external atmosphere is downward, which can reduce the loss of hot air from the stirring tank 2, and the setting of the feeding auger 15 can prolong the path of the hot air flowing along the feeding pipe 3, which can further reduce the loss of hot air, and is beneficial to maintaining the processing temperature in the stirring tank 2 and facilitating the mixing of the asphalt mixture.

[0038] With reference to Figure 3 and Figure 4 , the upper surface of the frame 1 is fixedly connected with the feeding hopper 6 through the support rod 16, the bottom wall of the feeding hopper 6 is slidingly connected with the feeding pipe 61, the outer side surface of the feeding pipe 61 is fixedly sleeved with the limiting ring 62, the limiting ring 62 and the feeding hopper 6 are connected with the reset spring 63, the feeding pipe 61 can abut against the upper surface of the feeding pipe 3, and the feeding pipe 61 is in communication with the inside of the feeding pipe 3.

[0039] When the stirring tank 2 is loaded, the feeding pipe 3 is turned upward to abut against the bottom wall of the feeding pipe 61, which pushes the feeding pipe 61 to move upward, preventing the feeding pipe 3 from being turned upward and interfering with the feeding pipe 61, at this time the reset spring 63 is compressed, and the feeding pipe 3 is in communication with the inside of the feeding pipe 61. When the asphalt mixture is heated, the feeding pipe 3 is turned downward to disengage from the feeding pipe 61, and the reset spring 63 pushes the feeding pipe 61 downward to reset.

[0040] With reference to Figure 3 , Figure 4 and Figure 5 , the rotating shaft 14 is internally provided with a gas conveying cavity 141, and the gas conveying cavity 141 is arranged in the axial direction of the transmission shaft 113. The side wall of the rotating shaft 14 is provided with an air inlet hole 142 and a gas conveying hole 143, and the air inlet hole 142 and the gas conveying hole 143 are arranged at both ends of the rotating shaft 14 and are in communication with the gas conveying cavity 141. The air inlet hole 142 is arranged close to the flame spraying mechanism 4, and the gas conveying hole 143 is arranged close to the feeding pipe 3. The feeding pipe 3 comprises an outer pipe 34 and an inner pipe 33, wherein the outer pipe 34 is made of heat insulation material, and the space between the outer pipe 34 and the inner pipe 33 is a gas conveying groove 31, and the gas conveying groove 31 is in communication with the gas conveying hole 143. The side wall of the feeding pipe 3 is provided with an air outlet hole 32, and the air outlet hole 32 is in communication with the gas conveying groove 31 and the inside of the stirring tank 2, respectively.

[0041] The hot air near the flame spraying mechanism 4 can enter the air conveying cavity 141 through the air inlet hole 142, and then enter the air conveying groove 31 through the air conveying hole 143 to heat the inner tube 33 in the material conveying pipe 3. The hot air flows upward to further reduce the heat loss in the stirring tank 2. In addition, the hot air enters the stirring tank 2 through the air outlet hole 32 to heat the stirring tank 2 far away from the flame spraying mechanism 4. When the asphalt mixture is transported to the flame spraying mechanism 4 by the stirring plate 21, the asphalt mixture is still distributed in the axial direction of the stirring tank 2, but the amount of asphalt mixture gradually decreases away from the flame spraying mechanism 4. Therefore, the end of the stirring tank 2 far away from the flame spraying mechanism 4 is heated, which improves the uniformity of the heat distribution in the stirring tank 2, and is beneficial to uniformly heat the asphalt mixture during mixing and to maintain the quality of the asphalt mixture product.

[0042] In addition, when a large amount of asphalt mixture is mixed in batches, multiple feeding and discharging are required. The inner tube 33 is heated, which can preheat the asphalt mixture during feeding to improve the heating efficiency of the asphalt mixture, and can reduce the amount of asphalt mixture adhering to the inner side of the material conveying pipe 3 during discharging. During discharging, the asphalt mixture moves to the outside of the material conveying pipe 3 under the action of the material conveying auger 15. The asphalt mixture filled in the material conveying pipe 3 can close the material conveying pipe 3 to a certain extent, which reduces the heat loss in the stirring tank 2 during discharging. When a large amount of asphalt mixture is mixed in batches, the residual heat in the stirring tank 2 is beneficial to reduce the heating time and improve the heating and mixing efficiency of the asphalt mixture.

[0043] Referring to Figure 5 and Figure 6 , the outer side of the rotating shaft 14 is fixedly connected with a flow converging plate 144 with a tapered side wall. The flow converging plate 144 is arranged at the end of the air inlet hole 142 away from the flame spraying mechanism 4, and the opening of the flow converging plate 144 is arranged to face the flame spraying mechanism 4. The flow converging plate 144 converges and guides the hot air near the flame spraying mechanism 4, thereby increasing the amount of hot air entering the air inlet hole 142.

[0044] Referring to Figure 2 and Figure 3The spray fire mechanism 4 comprises a gas tank 41, a gas pipe 42, a gas jet head 43 and an igniter 45. The gas tank 41 and the gas jet head 43 are fixedly connected to the upper surface of the frame 1, the gas jet head 43 extends into the interior of the stirring tank 2, the gas tank 41 is filled with fuel gas, the gas pipe 42 is fixedly connected between the gas tank 41 and the gas jet head 43, and the igniter 45 is fixedly connected with the gas jet head 43. The gas pipe 42 is internally connected in series with a control valve 44, the operator opens the control valve 44 to make the fuel gas in the gas tank 41 enter the gas jet head 43 through the gas pipe 42, and the igniter 45 starts to ignite the fuel gas, thereby realizing the heating of the asphalt mixture by the spray fire mechanism 4.

[0045] With reference to Figure 2 and Figure 6 , the outer side of the rotating shaft 14 is fixedly sleeved with a flow guide shell 5, and the flow guide shell 5 is fixedly connected with the rotating shaft 14 through a connecting plate 51. The side wall of the flow guide shell 5 is conical to gather and deliver the hot air to the direction of the material conveying pipe 3.

[0046] With reference to Figure 6 , the side wall of the flow guide shell 5 is fixedly connected with L-shaped flow guide pipes 52, the flow guide pipes 52 are arranged in multiple, the flow guide pipes 52 are uniformly arrayed along the axial and circumferential directions of the flow guide shell 5, one end of the flow guide pipes 52 is communicated with the interior 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, and since the asphalt mixture contacts the inner side of the stirring tank 2, the hot air flow in the interior of the flow guide shell 5 is delivered along the radial direction to the inner side of the stirring tank 2, which is beneficial to the sufficient contact of the asphalt mixture with the hot air, thereby being beneficial to the heating and mixing effect of the asphalt mixture.

[0047] The implementation principle of the asphalt mixture mixing device is as follows: when the raw materials such as aggregates, asphalt and mineral powder are input into the stirring tank 2, the feeding pipe 3 is rotated to make the opening of the feeding pipe 3 far from the stirring tank 2 vertically upward, and the operator uses the forklift to deliver the raw materials into the feeding pipe 3. The feeding auger 15 is positively rotated, and 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 is started to heat the asphalt mixture in the stirring tank 2. The rotation source 11 drives the stirring tank 2 to positively rotate, and the overturning plate 21 overturns the asphalt mixture at the bottom of the stirring tank 2 upward to mix, and the overturning plate 21 is arranged obliquely to drive the asphalt mixture to move close to the fire spraying mechanism 4. At this time, the feeding pipe 3 is rotated to make the opening of the feeding pipe 3 far from the stirring tank 2 downward, so as to reduce the heat loss caused by the hot air in the stirring tank 2 output from the feeding pipe 3. After the asphalt mixture is mixed, the rotation source 11 drives the stirring tank 2 to reversely rotate, the overturning plate 21 drives the asphalt mixture to move close to the feeding pipe 3, the feeding auger 15 is reversely rotated, and the opening of the feeding pipe 3 far from the fire spraying mechanism 4 is downward at this time. At this time, the feeding auger 15 drives the asphalt mixture to output, and the operator can receive the asphalt mixture by using the hopper and deliver the asphalt mixture to the next station.

[0048] In addition, it should be noted that, in the description of the present application, the terms "mounting", "connecting" and "connecting" should be understood broadly.

[0049] 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 principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. An asphalt mixture mixing device, comprising a vehicle frame (1), characterized in that: a mixing tank (2) and a rotating source I (11) for driving the mixing tank (2) to rotate are connected to the vehicle frame (1), and an inner side of the mixing tank (2) is fixedly connected with a stirring plate (21) for driving the asphalt mixture to rise; a side wall of one end of the mixing tank (2) is provided with a feeding port (22), an inner side of the feeding port (22) is rotatably connected with a feeding pipe (3), the feeding pipe (3) is L-shaped, the feeding pipe (3) is in communication with the inside of the mixing tank (2), a rotating source II (12) for driving the feeding pipe (3) to rotate is fixedly connected to the vehicle frame (1), and one end of the mixing tank (2) away from the feeding pipe (3) is provided with a fire spraying mechanism (4); a rotating source III (13) is fixedly connected to the vehicle frame (1), an output shaft of the rotating source III (13) is fixedly connected with a feeding auger (15) through a rotating shaft (14), and the feeding auger (15) is arranged in the feeding pipe (3); the rotating shaft (14) is internally provided with a gas conveying cavity (141), a side wall of the rotating shaft (14) is provided with an air inlet hole (142) and a gas conveying hole (143) in communication with the gas conveying cavity (141), the air inlet hole (142) is arranged close to the fire spraying mechanism (4), a side wall of the feeding pipe (3) is provided with a gas conveying groove (31) in communication with the gas conveying hole (143), and the side wall of the feeding pipe (3) is provided with an air outlet hole (32) in communication with the gas conveying groove (31) and the inside of the mixing tank (2).

2. An asphalt mixture mixing apparatus according to claim 1, characterized in that: An outer side of the rotating shaft (14) is fixedly connected with a flow converging plate (144) with a tapered side wall, and the flow converging plate (144) is arranged at one end of the air inlet hole (142) away from the fire spraying mechanism (4).

3. An asphalt mixture mixing plant according to claim 2, characterised in that: The fire spraying mechanism (4) comprises a gas storage tank (41) fixedly arranged on the vehicle frame (1), the gas storage tank (41) is communicated with a gas jet head (43) through a gas conveying pipe (42), the gas conveying pipe (42) is serially connected with a control valve (44) inside, the gas jet head (43) is fixedly connected with the vehicle frame (1) and is in communication with the inside of the mixing tank (2), and a fire lighter (45) is fixedly connected to the gas jet head (43).

4. An asphalt mixture mixing plant according to claim 3, characterised in that: An outer side of the rotating shaft (14) is fixedly sleeved with a flow guide shell (5), and the flow guide shell (5) is fixedly connected with the rotating shaft (14) through a connecting plate (51).

5. An asphalt mixture mixing plant according to claim 4, characterised in that: A side wall of the flow guide shell (5) is fixedly connected with an L-shaped flow guide pipe (52), and one end of the flow guide pipe (52) extending out of the flow guide shell (5) is arranged along the radial direction of the mixing tank (2).

6. An asphalt mixture mixing plant according to claim 3, characterised in that: An upper surface of the vehicle frame (1) is fixedly connected with a feeding hopper (6) through a supporting rod (16), a bottom wall of the feeding hopper (6) is slidably connected with a feeding pipe (61), an outer side of the feeding pipe (61) is fixedly sleeved with a limiting ring (62), the limiting ring (62) and the feeding hopper (6) are connected with a return spring (63), the feeding pipe (61) can abut against an upper surface of the feeding pipe (3), and the feeding pipe (61) is in communication with the inside of the feeding pipe (3).

7. An asphalt mixture mixing apparatus according to claim 1, wherein: The rotating source one (11) is fixedly connected to the vehicle frame (1), the output shaft of the rotating source one (11) is fixedly sleeved with a driving gear (111), and the outer side of the stirring tank (2) is fixedly connected with a plurality of transmission gear teeth (112) which can be engaged with the driving gear (111).

8. An asphalt mixture mixing plant according to claim 1, characterized in that: The rotating source two (12) is fixedly connected to the vehicle frame (1), the output shaft of the rotating source two (12) is fixedly sleeved with a connecting gear (121), and the outer side of the material conveying pipe (3) is fixedly sleeved with a driven gear (122) which can be engaged with the connecting gear (121).

9. An asphalt mixture mixing plant according to claim 1, characterized in that: The lower bottom surface of the vehicle frame (1) is fixedly connected with a hydraulic supporting leg (17).

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