Hot mixing device for asphalt mixture
By introducing a movable mixing mechanism and a heating mechanism into the asphalt mixture mixing device, the problems of uneven mixing and heat exchange of liquid asphalt are solved, achieving efficient and uniform mixing of the mixture and uniform distribution of asphalt, thus improving the quality of the finished product.
Patent Information
- Application Number
- CN202520509879.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-03-21
AI Technical Summary
In existing asphalt mixing equipment, the fixed position of the mixing paddle leads to poor mixing uniformity, and the heat of the liquid asphalt is absorbed by the mixture, causing a sudden drop in temperature and affecting the quality of the mixture.
It employs a movable mixing and heating mechanism, with a servo motor driving the central tube to rotate and reciprocate. Combined with inert gas heating in the heating chamber, it ensures uniform heating of the mixture and liquid asphalt, avoiding heat exchange.
It improves the uniform mixing effect of the mixture, maintains the fluidity of liquid asphalt, ensures uniform mixing of the mixture and asphalt, and improves the quality of the finished product.
Smart Images
Figure CN223915143U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of asphalt mixture production technology, specifically to a hot mixing device for asphalt mixtures. Background Technology
[0002] Asphalt mixture is a general term for mixtures made by mixing aggregates and asphalt binders. Based on material composition and structure, it is classified into continuously graded and discontinuously graded mixtures. Mixing must be carried out at high temperatures.
[0003] Existing asphalt mixture mixing devices typically include a container tank and a mixing paddle structure installed within it. The mixing paddle is driven by a drive motor to rotate and mix the asphalt mixture in a fixed position inside the container tank. However, the fixed position of the mixing paddle results in poor uniformity of the asphalt mixture. Furthermore, after the liquid asphalt is poured into the container tank, its heat is absorbed by other mixtures, causing a rapid drop in temperature, which increases its viscosity and reduces its fluidity. Consequently, it cannot be mixed evenly with the mixture, ultimately affecting the quality of the finished asphalt mixture. Therefore, we propose an improved hot-mix asphalt mixture device to solve this problem. Utility Model Content
[0004] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A hot-mix asphalt mixture device includes a shell, a sealing disc rotatably connected to the left side of the shell, a second support frame and a first support frame respectively sleeved on both sides of the shell, a top plate connected between the second support frame and the first support frame, a feed hopper connected to the upper end of the shell, the feed hopper being inserted into the top plate, a fixing frame connected to one side of the second support frame, a heating mechanism installed on the left side of the fixing frame, a mixing mechanism installed on the right side of the fixing frame, one end of the mixing mechanism penetrating the sealing disc and extending into the inner cavity of the shell, a displacement mechanism provided on the outer side of the mixing mechanism, a discharge pipe connected to the lower outer side of the shell, and a gate valve installed on the outer side of the discharge pipe;
[0007] The stirring mechanism includes a servo motor mounted on the outside of the fixed frame. The output end of the servo motor is connected to a first gear. A second gear meshes with the outside of the first gear. A central tube is mounted in the middle of the second gear. The central tube is rotatably connected to the sealing disc. A stirring assembly is movably sleeved on the outside of the central tube. The stirring assembly is connected to a displacement mechanism. One end of the central tube passes through the shell and is rotatably connected to a return pipe. Fixed pipes are equidistantly connected to the return pipe. All fixed pipes are connected to the upper outer part of the shell.
[0008] The displacement mechanism includes a transmission assembly that is movably sleeved with the central tube. A connecting rod is connected to the outside of the transmission assembly. A transmission shaft is installed at the lower end of the connecting rod through a fixed sleeve. One end of the transmission shaft passes through the sealing disc and extends into the inner cavity of the housing. A first stirring rod is connected to one end of the transmission shaft. The first stirring rod is connected to the stirring assembly.
[0009] As a further embodiment of this utility model: the heating mechanism includes a heating box installed on the outside of the fixed frame, a box door rotatably connected to the outside of the heating box, a spiral tube provided in the inner cavity of the heating box, an air inlet pipe and an exhaust pipe respectively connected to both ends of the spiral tube, the ends of the air inlet pipe and the exhaust pipe away from the spiral tube both penetrate the heating box and extend to its outside, heaters are installed at equal intervals on both sides of the inner cavity of the heating box, and one end of the exhaust pipe is rotatably connected to the left end of the central tube.
[0010] As a further embodiment of this utility model: several second stirring rods are connected to the outer side of the first stirring rod.
[0011] As a further embodiment of this utility model: the transmission assembly includes a movable sleeve that is movably sleeved with the central tube; a limiting groove is provided on the outer side of the central tube; a limiting strip that slides with the limiting groove is integrally connected to the inner cavity of the movable sleeve; a convex sleeve is formed on the left end of the movable sleeve; a movable ring is rotatably sleeved on the outer side of the convex sleeve; a fixing cover for limiting the movable ring is fixedly connected to the outer side of the convex sleeve; support rods are symmetrically welded to the outer side of the movable ring; a support plate is connected between the two support rods; a threaded structure is provided on the outer surface of the central tube; a limiting hole is provided at the lower end of the support plate that is screwed onto the outer surface of the central tube; a limiting post is movably inserted into the inner cavity of the limiting hole; one end of the limiting post is connected to the fixing frame; and a connecting rod is installed on the outer side of the movable sleeve.
[0012] As a further embodiment of this utility model: the stirring assembly includes a support seat movably sleeved on the outside of the central tube, the support seat is connected to the first stirring rod, one end of the support seat is connected to the first stirring shaft, and a second stirring shaft is equidistantly installed on the outside of the first stirring shaft.
[0013] As a further embodiment of this utility model: an installation sleeve is installed on the outer side of the central tube, and a discharge plate is equidistantly connected to the outer side of the installation sleeve.
[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0015] Through the coordinated operation of the stirring mechanism and the displacement mechanism, the rotation of the central tube of the stirring mechanism drives the transmission assembly to rotate and move. The transmission assembly, through the connecting rod and the fixed sleeve, drives the transmission shaft to move synchronously. The transmission shaft drives the first stirring rod and the second stirring rod to rotate synchronously left and right. The first stirring rod drives the support seat sleeved on the outside of the central tube to rotate synchronously. The support seat drives the first stirring shaft and multiple second stirring shafts on its outside to move synchronously. Thus, the first stirring rod, the second stirring rod, the first stirring shaft, and the second stirring shaft automatically stir the various mixtures poured into the inner cavity of the shell, and while rotating and stirring, they move back and forth in the inner cavity of the shell, simultaneously cooperating with the heating mechanism. The heat conducted after heating facilitates uniform heating and mixing of various materials, ensuring that both the mixture and liquid asphalt are at a high temperature. This prevents the asphalt mixture from absorbing heat from the liquid asphalt, thus avoiding a sudden drop in temperature that increases viscosity and reduces fluidity, making it difficult to mix evenly with the mixture. The subsequent reciprocating rotation and mixing of the first and second stirring rods, first and second stirring shafts effectively mixes the asphalt with materials at different locations, significantly improving the mixing effect.
[0016] Compared with existing technologies, this invention heats and mixes various materials other than asphalt before mixing, resulting in a high temperature after uniform mixing. This prevents the liquid asphalt from absorbing the temperature of the mixture, increasing its fluidity during mixing. This facilitates rapid contact and mixing of the liquid asphalt with the mixture at different locations, allowing for easy mixing of the liquid asphalt and the mixture, and effectively improving the mixing effect of asphalt in the mixture. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;
[0018] Figure 2 This is a partial cross-sectional perspective view of the three-dimensional structure of this utility model;
[0019] Figure 3 This is a schematic diagram of the unfolded three-dimensional structure of the heating box of this utility model;
[0020] Figure 4 This is a three-dimensional structural diagram of the disassembled transmission component of this utility model;
[0021] Figure 5 This is a three-dimensional structural diagram of the stirring component of this utility model.
[0022] The reference numerals and names in the figure are as follows:
[0023] Shell-1, Feed Hopper-2, Sealing Plate-3, First Support Frame-4, Second Support Frame-5, Fixing Frame-6, Heating Mechanism-7, Heating Box-71, Box Door-72, Air Inlet Pipe-73, Spiral Pipe-74, Exhaust Pipe-75, Heater-76, Stirring Mechanism-8, Servo Motor-81, First Gear-82, Second Gear-83, Central Pipe-84, Stirring Assembly-85, Support Base-851, First Stirring Shaft-852, Second Stirring Shaft-853, Mounting Sleeve-86, Discharge Plate -87, Return pipe -88, Fixed pipe -89, Limiting groove -810, Displacement mechanism -9, Transmission assembly -91, Movable sleeve -911, Limiting strip -912, Connecting rod -913, Fixed sleeve -914, Convex sleeve -915, Movable ring -916, Fixed cover -917, Support rod -918, Support plate -919, Limiting hole -920, Transmission shaft -92, First stirring rod -93, Second stirring rod -94, Top plate -10, Discharge pipe -11, Gate valve -12, Limiting post -13. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] Please see Figure 1-5 A hot mixing device for asphalt mixture includes a shell 1, a sealing disc 3 rotatably connected to the left side of the shell 1, a second support frame 5 and a first support frame 4 respectively sleeved on both sides of the shell 1, a top plate 10 connected between the second support frame 5 and the first support frame 4, a feed hopper 2 connected to the upper end of the shell 1, the feed hopper 2 being inserted into the top plate 10, and a fixing frame 6 connected to one side of the second support frame 5.
[0026] A stirring mechanism 8 is installed on the right side of the fixed frame 6. One end of the stirring mechanism 8 passes through the sealing disk 3 and extends into the inner cavity of the housing 1. A displacement mechanism 9 is provided on the outside of the stirring mechanism 8. The stirring mechanism 8 includes a servo motor 81 installed on the outside of the fixed frame 6. The output end of the servo motor 81 is connected to a first gear 82. A second gear 83 meshes with the outside of the first gear 82. A central tube 84 is installed in the middle of the second gear 83. The central tube 84 is rotatably connected to the sealing disk 3. A stirring assembly 8 is movably sleeved on the outside of the central tube 84. 5. The stirring assembly 85 is connected to the displacement mechanism 9. The displacement mechanism 9 includes a transmission assembly 91 that is movably sleeved with the central tube 84. A connecting rod 913 is connected to the outside of the transmission assembly 91. A transmission shaft 92 is installed at the lower end of the connecting rod 913 through a fixing sleeve 914. One end of the transmission shaft 92 passes through the sealing disc 3 and extends into the inner cavity of the housing 1. A first stirring rod 93 is connected to one end of the transmission shaft 92. The first stirring rod 93 is connected to the stirring assembly 85. Several second stirring rods 94 are connected to the outside of the first stirring rod 93.
[0027] The stirring assembly 85 includes a support seat 851 that is movably sleeved on the outside of the central tube 84. The support seat 851 is connected to the first stirring rod 93. One end of the support seat 851 is connected to the first stirring shaft 852. A second stirring shaft 853 is installed at equal intervals on the outside of the first stirring shaft 852.
[0028] After various asphalt mixtures are sequentially poured into the feed hopper 2, the servo motor 81 is activated via an external controller. The output of the servo motor 81 drives the first gear 82 to rotate in both directions. The first gear 82 drives the second gear 83 and the central tube 84 to rotate in both directions. The central tube 84, through the transmission assembly 91, drives the connecting rod 913 and the fixing sleeve 914 to rotate and reciprocate left and right. The fixing sleeve 914 drives the transmission shaft 92 to move synchronously. The transmission shaft 92 drives the first stirring rod 93 and the second stirring rod 94 to rotate and reciprocate left and right synchronously. The first stirring rod 93 drives the support seat 851, which is sleeved on the outside of the central tube 84, to rotate and move synchronously. The support seat 851 drives the first stirring shaft 852 and multiple second stirring shafts 853 on its outer side to move synchronously. Furthermore, the first stirring rod 93, the second stirring rod 94, the first stirring shaft 852, and the second stirring shaft 853 automatically stir the various mixtures poured into the inner cavity of the shell 1. While rotating and stirring, they also move back and forth inside the inner cavity of the shell 1, further enhancing the effect of uniform mixing of the mixtures. When the various mixtures are being stirred, the heating mechanism 7 heats and stirs the mixtures, raising their temperature. Finally, liquid asphalt is poured into the feed hopper 2, causing the first stirring rod 93, the second stirring rod 94, the first stirring shaft 852, and the second stirring shaft 853 to move back and forth and rotate while mixing the various mixtures and liquid asphalt poured into the inner cavity of the shell 1, effectively improving the effect of uniform mixing of asphalt and various mixtures.
[0029] A heating mechanism 7 is installed on the left side of the fixed frame 6. The heating mechanism 7 includes a heating box 71 installed on the outside of the fixed frame 6. A box door 72 is rotatably connected to the outside of the heating box 71. A spiral tube 74 is provided in the inner cavity of the heating box 71. An air inlet pipe 73 and an exhaust pipe 75 are respectively connected to the two ends of the spiral tube 74. The ends of the air inlet pipe 73 and the exhaust pipe 75 away from the spiral tube 74 both pass through the heating box 71 and extend to its outside. Heaters 76 are installed at equal intervals on both sides of the inner cavity of the heating box 71. One end of the exhaust pipe 75 is rotatably connected to the left end of the central tube 84. One end of the central tube 84 passes through the shell 1 and is rotatably connected to a return pipe 88. Fixed pipes 89 are equidistantly connected to the return pipe 88. The fixed pipes 89 are respectively connected to the upper part of the outer side of the shell 1.
[0030] The heater 76 is started and its temperature is adjusted to the preset temperature by an external temperature controller. Then, an external air compressor delivers inert compressed gas to the intake pipe 73. The intake pipe 73 then delivers the inert gas from the spiral tube 74 (the illustration is for reference only; the actual spiral tube 74 is longer than shown, but the pitch is smaller to ensure heating efficiency) to the exhaust pipe 75, and finally into the central pipe 84. When the inert gas enters the spiral tube 74, it absorbs the heat generated by the heater 76 inside the heating chamber 71, causing heat exchange between the room-temperature inert gas and the hot spiral tube 74. This transforms the room-temperature inert gas into high-temperature hot gas, which is then delivered to the central pipe 84. In the central tube 84, the support base 851, the first stirring shaft 852, the second stirring shaft 853, the first stirring rod 93, and the second stirring rod 94 are all made of high-temperature resistant materials. The hot air in the central tube 84 is discharged from the return pipe 88 to multiple fixed pipes 89, and then blown into the inner cavity of the shell 1. This facilitates the heating of various mixtures by blowing hot air, effectively improving the heating and mixing effect of various mixtures. Therefore, both the mixture and the liquid asphalt are in a high-temperature state, so that the mixture will not absorb the heat of the liquid asphalt. This avoids the mixture absorbing the heat of the liquid asphalt during the mixing of the liquid asphalt and the mixture, which would cause the liquid asphalt temperature to drop sharply, increasing its viscosity and reducing its fluidity, making it impossible to mix evenly with the mixture.
[0031] The transmission assembly 91 includes a movable sleeve 911 that is movably sleeved with the central tube 84. A limiting groove 810 is provided on the outer side of the central tube 84. A limiting strip 912 that slides with the limiting groove 810 is integrally connected to the inner cavity of the movable sleeve 911. A convex sleeve 915 is formed on the left end of the movable sleeve 911. A movable ring 916 is rotatably sleeved on the outer side of the convex sleeve 915. A fixing cover 917 for limiting the movable ring is fixedly connected to the outer side of the convex sleeve 915. Support rods 918 are symmetrically welded to the outer side of the movable ring 916. A support plate 919 is connected between the two support rods 918. The outer surface of the central tube 84 is provided with a threaded structure. The support plate 919 is screwed into the outer surface of the central tube 84. A limiting hole 920 is provided at the lower end of the support plate 919. A limiting post 13 is movably inserted into the inner cavity of the limiting hole 920. One end of the limiting post 13 is connected to the fixing frame 6. The connecting rod 913 is installed on the outer side of the movable sleeve 911.
[0032] When the central tube 84 rotates forward and backward, the support plate 919 screwed to the outside of the central tube 84, with its lower limiting hole 920 and limiting post 13 in a limited movable insertion (sliding back and forth), moves back and forth on the outside of the central tube 84. The support plate 919 drives the movable ring 916 to move synchronously via the support rod 918. The movable ring 916 rotates and is sleeved on the convex sleeve 915. Thus, while the movable ring 916 moves back and forth, it also drives the convex sleeve 915 to move synchronously left and right. The convex sleeve 915 then drives the movable sleeve 911 to move together. During the movement, the limiting strip 912 inside the movable sleeve 911 slides with the limiting groove 810, so when the central tube 84 rotates, the central tube 84 drives the movable sleeve 911 to rotate. Thus, the movable sleeve 911 moves back and forth while rotating. In turn, the movable sleeve 911 drives the transmission shaft 92, the first stirring rod 93, the second stirring rod 94, the support seat 851, the first stirring shaft 852, and the second stirring shaft 853 to rotate while moving back and forth from left to right and from right to left.
[0033] A feed pipe 11 is connected to the lower outer side of the housing 1. A gate valve 12 is installed on the outer side of the feed pipe 11. An installation sleeve 86 is installed on the outer side of the central pipe 84. A discharge plate 87 is equidistantly connected to the outer side of the installation sleeve 86.
[0034] Because the shell 1 is designed with an inclination, and the central tube 84 drives the discharge plate 87 to rotate via the mounting sleeve 86, the rotation of the discharge plate 87 facilitates rapid discharge of the asphalt mixture from the discharge pipe 11. Furthermore, before discharge, the temperature of the heater 76 is adjusted by a temperature controller to reduce the temperature transferred to the asphalt mixture, thereby increasing the viscosity of the asphalt and enhancing the mixing and adhesion of the asphalt and the mixture in the later stages.
[0035] Working Principle: This invention uses an external temperature controller to start and regulate the temperature of the heater 76. The heating mechanism 7 then delivers heated inert gas to the central tube 84, heating it. This heat then conducts heat to the support base 851, which is slidably connected to the central tube. The support base 851 then transfers heat to the first stirring shaft 852, the second stirring shaft 853, the first stirring rod 93, and the second stirring rod 94. The hot gas in the central tube 84 is discharged from the return pipe 88 to multiple fixed pipes 89, and then blown into the inner cavity of the housing 1. This facilitates heating of various mixtures during mixing, effectively improving the mixing efficiency. The heating, stirring, and mixing effect of the materials is achieved. Simultaneously, after multiple mixtures are sequentially poured into the feed hopper 2, the servo motor 81 is activated via an external controller. The output of the servo motor 81 drives the first gear 82 to rotate forward and backward. The first gear 82 drives the second gear 83 and its inner central tube 84 to rotate forward and backward. The central tube 84, through the transmission assembly 91, drives the connecting rod 913 and the fixing sleeve 914 to rotate and reciprocate left and right. The fixing sleeve 914 drives the transmission shaft 92 to move synchronously. The transmission shaft 92 drives the first stirring rod 93 and the second stirring rod 94 to rotate and reciprocate left and right synchronously. The first stirring rod 93 drives the rod sleeved on the outside of the central tube 84... The side support 851 rotates synchronously, driving the first stirring shaft 852 and multiple second stirring shafts 853 on its outer side to move synchronously. This causes the first stirring rod 93, second stirring rod 94, first stirring shaft 852, and second stirring shaft 853 to automatically stir the various mixtures poured into the inner cavity of the shell 1. The heat absorbed by the stirring rods is quickly absorbed by the various mixtures, increasing the efficiency of temperature rise. Simultaneously, the stirring rods move back and forth within the inner cavity of the shell 1, further enhancing the uniform mixing effect. Finally, liquid asphalt is poured into the feed hopper 2, causing the first stirring rod 93... The second stirring rod 94, the first stirring shaft 852, and the second stirring shaft 853 reciprocate and rotate while mixing the various mixtures and liquid asphalt poured into the inner cavity of the housing 1. This effectively improves the uniform mixing effect of asphalt and various mixtures. After continuous heating, both the mixture and the liquid asphalt are at a high temperature, so the asphalt mixture will not absorb the heat of the liquid asphalt. This avoids the mixture absorbing the heat of the liquid asphalt during mixing, which would cause the liquid asphalt temperature to drop sharply, increasing its viscosity and reducing its fluidity, making it impossible to mix evenly with the mixture. This effectively improves the hot mixing effect of the asphalt mixture.
[0036] In one embodiment, a sealing ring is provided at the connection between 92 and the chamber.
[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A hot mix asphalt plant comprising: The utility model provides a kind of heating mechanism and stirring mechanism for the shell (1) of the left side rotation connection sealing disc (3), the shell (1) is connected with the first support frame (4) and the second support frame (5) of two sides respectively, the second support frame (5) and first support frame (4) are connected with top plate (10) between common, the upper end of shell (1) is connected with feed hopper (2), feed hopper (2) is inserted between top plate (10), the side of second support frame (5) is connected with fixed frame (6), the left side of fixed frame (6) is equipped with heating mechanism (7), the right side of fixed frame (6) is equipped with stirring mechanism (8), the one end of stirring mechanism (8) penetrates sealing disc (3) and extends to the inner chamber of shell (1), the outside of stirring mechanism (8) is provided with displacement mechanism (9), the outside lower part of shell (1) is connected with discharge pipe (11), the outside of discharge pipe (11) is equipped with gate valve (12).
2. A hot mix asphalt plant as claimed in claim 1, wherein, The stirring mechanism (8) includes a servo motor (81) mounted on the outside of the fixed frame (6), the output end of the servo motor (81) is connected with a first gear (82), the outside of the first gear (82) is engaged with a second gear (83), the middle part of the second gear (83) is mounted with a central tube (84), the central tube (84) is rotatably connected with the sealing disc (3), the outside of the central tube (84) is movably sleeved with a stirring assembly (85), the stirring assembly (85) is connected with the displacement mechanism (9), one end of the central tube (84) penetrates the shell (1) and is rotatably connected with a return pipe (88), the return pipe (88) is equally connected with a fixed pipe (89), and the fixed pipe (89) is in communication with the upper part of the outside of the shell (1).
3. A hot mix asphalt plant as claimed in claim 2, wherein, The displacement mechanism (9) includes a transmission assembly (91) movably sleeved with the central tube (84), the outside of the transmission assembly (91) is connected with a connecting rod (913), the lower end of the connecting rod (913) is mounted with a transmission shaft (92) through a fixing sleeve (914), one end of the transmission shaft (92) penetrates the sealing disc (3) and extends to the inner chamber of the shell (1), one end of the transmission shaft (92) is connected with a first stirring rod (93), and the first stirring rod (93) is connected with the stirring assembly (85).
4. A hot mix asphalt plant as claimed in claim 3, wherein, The heating mechanism (7) includes a heating box (71) mounted on the outside of the fixed frame (6), the outside of the heating box (71) is rotatably connected with a box door (72), the inner chamber of the heating box (71) is provided with a spiral pipe (74), the two ends of the spiral pipe (74) are respectively connected with an air inlet pipe (73) and an air outlet pipe (75), one end of the air inlet pipe (73) and the air outlet pipe (75) away from the spiral pipe (74) penetrates the heating box (71) and extends to the outside thereof, the inner chamber of the heating box (71) is equally mounted with a heater (76) on both sides, and one end of the air outlet pipe (75) is rotatably connected with the left end of the central tube (84).
5. The hot mix asphalt plant of claim 3, wherein, The outside of the first stirring rod (93) is connected with a plurality of second stirring rods (94).
6. A hot mix asphalt plant as claimed in claim 5, wherein, The transmission assembly (91) comprises a movable sleeve (911) movably sleeved with the central pipe (84), the outer side of the central pipe (84) is provided with a limiting groove (810), the inner cavity of the movable sleeve (911) is integrally connected with a limiting strip (912) slidably connected with the limiting groove (810), the left end of the movable sleeve (911) is formed with a convex sleeve (915), the outer side of the convex sleeve (915) is rotatably sleeved with a movable ring (916), the outer side of the convex sleeve (915) is fixedly connected with a fixed cover (917) for limiting the movable ring, the outer side of the movable ring (916) is symmetrically welded with a supporting rod (918), two supporting rods (918) are commonly connected with a supporting plate (919), the outer surface of the central pipe (84) is provided with a threaded structure, the supporting plate (919) is screw-connected with the outer surface of the central pipe (84), the lower end of the supporting plate (919) is provided with a limiting hole (920), the inner cavity of the limiting hole (920) is movably inserted with a limiting column (13), one end of the limiting column (13) is connected with the fixed frame (6), and the connecting rod (913) is installed on the outer side of the movable sleeve (911).
7. A hot mix asphalt plant as claimed in claim 6, wherein, The stirring assembly (85) comprises a supporting seat (851) movably sleeved on the outer side of the central pipe (84), the supporting seat (851) is connected with the first stirring rod (93), one end of the supporting seat (851) is connected with a first stirring shaft (852), and the outer side of the first stirring shaft (852) is equidistantly installed with a second stirring shaft (853).
8. A hot mix asphalt plant as claimed in claim 7, wherein, The outer side of the central pipe (84) is installed with a mounting sleeve (86), and the outer side of the mounting sleeve (86) is equidistantly connected with a discharging plate (87).