Asphalt stirring equipment
By designing a dual-drive mixing drum and mixing components and a preheating system, the problems of mixing blind spots and uneven temperature in existing equipment have been solved, achieving efficient and uniform mixing and temperature control of asphalt mixtures, thus improving road quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-07
- Publication Date
- 2026-03-31
AI Technical Summary
Existing asphalt mixing equipment suffers from problems such as mixing blind spots, uneven heating, and temperature imbalance, resulting in unstable asphalt mixture quality and affecting the service life of pavements.
The design employs a dual-drive mixing drum and mixing components, combined with a preheating and heat transfer oil heating system. Through the alternating motion of multi-directional stirring racks and annular stirring blades, uniform mixing and temperature control of materials are achieved.
It achieves seamless shear mixing during the mixing process, improving the uniformity and temperature stability of asphalt mixtures, avoiding blind spots and local overheating, and enhancing the quality of asphalt mixtures and pavement performance.
Smart Images
Figure CN121760263A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of asphalt mixing and processing equipment, and in particular to an asphalt mixing device. Background Technology
[0002] Asphalt mixing equipment is a core piece of equipment in road construction systems. It prepares asphalt mixtures that meet road performance requirements by precisely metering, heating, and forcibly mixing aggregates, asphalt binders, and mineral fillers according to the design ratio. This directly determines the load-bearing strength, impermeability, aging resistance, and service life of asphalt pavements. The mixing uniformity, heating stability, and consistency of mixture performance of asphalt mixing equipment have become core technical requirements in the industry.
[0003] Currently, the mainstream asphalt mixing equipment on the market is mainly divided into intermittent and continuous types. The mixing cylinder of intermittent equipment is mostly square or round, and it relies on three sets of eccentrically installed mixing blades to turn the material over. The agitator of continuous equipment is mostly a long-shaft horizontal structure, and the material flows continuously along the axial direction to complete the mixing. When heating asphalt mixing, a direct flame injection heating method is used, and the burner flame directly contacts the asphalt storage tank or conveying pipeline to heat the asphalt passing through.
[0004] Regarding the aforementioned technologies, the inventors discovered that intermittent mixing equipment suffers from a gap between the rotation trajectory of the mixing blades and the inner wall of the mixing cylinder, resulting in fixed mixing blind zones at the four corners or bottom center of the cylinder. Furthermore, the linear velocity of the mixing blades increases linearly from the shaft core to the edge, creating a significant intensity gradient in the radial direction of the mixer. Over-mixing in the edge areas leads to asphalt emulsification. In practical engineering applications, these blind zones cause aggregate segregation and uneven heating, leading to unbalanced asphalt aging. This significantly affects the quality of asphalt mixtures and shortens the service life of pavements. Additionally, using direct flame heating for asphalt heating results in a situation where the high temperature at the flame center causes a char layer to form instantly in the asphalt directly in contact with the flame, while the asphalt temperature in areas far from the flame inside the storage tank remains low, failing to reach the mixing temperature, creating an unbalanced state of coexisting hot and cold conditions. Summary of the Invention
[0005] To overcome the common technical defects of existing intermittent mixing equipment, such as the gap between the rotation trajectory of the mixing blades and the inner wall of the mixing tank, the formation of fixed mixing blind zones at the four corners or bottom center of the tank, the linear velocity of the mixing blades increasing linearly from the shaft core to the edge, the obvious intensity gradient in the radial direction of the mixer, and the over-mixing in the edge area leading to asphalt emulsification, these blind zones cause aggregate segregation and uneven heating leading to asphalt aging imbalance in practical engineering applications, seriously affecting the quality of asphalt mixtures and thus shortening the service life of pavements. Furthermore, the use of direct flame injection heating for asphalt heating results in a situation where the temperature at the center of the flame is high, causing the asphalt in direct contact with the flame to instantly form a char layer, while the asphalt temperature in the area inside the tank far from the flame is low and has not reached the mixing temperature, creating an imbalance of hot and cold conditions. Therefore, this application provides an asphalt mixing device.
[0006] The asphalt mixing equipment provided in this application adopts the following technical solution:
[0007] An asphalt mixing plant includes a support component, a mixing component, a preheating component, and a mixing component. The support component includes a support frame, a first rotating frame, and a second rotating frame. The first rotating frame and the second rotating frame are symmetrically arranged above the support frame. The mixing component includes a mixing drum, which is horizontally arranged above the support frame and is horizontally rotatably connected to the first rotating frame and the second rotating frame. The feed end of the mixing drum is connected to and fixed with a preheating component, which is used to preheat the asphalt material. The discharge end of the mixing drum is penetrated and inserted into the mixing component, which is used to mix the asphalt material.
[0008] By adopting the above technical solution, and through the technical features of the support frame, the first rotating frame, and the second rotating frame, these frames provide stable support and allow the mixing drum to rotate horizontally, thereby achieving the overall stability of the equipment. The first and second rotating frames, by providing dual support, ensure the precise and stable rotation of the mixing drum during high-speed mixing, thus enhancing equipment stability and mixing uniformity, achieving efficient asphalt preheating and mixing. The preheating component, connected and fixed to the feed end of the mixing drum, preheats the asphalt before it enters the drum, improving its fluidity, making mixing more uniform, reducing mixing difficulty, and thus improving the overall mixing and stirring quality. In other words, preheating makes it easier for the asphalt to mix evenly with other materials, thereby improving the quality of the final asphalt mixture. The mixing component, inserted through the mixing drum, works in conjunction with the drum to further mix the asphalt. The mixing unit provides additional mixing power, ensuring that all materials are mixed evenly. This enhances the mixing effect, thereby ensuring the quality stability and uniformity of the asphalt mixture. In other words, the additional mixing power ensures that all materials are thoroughly and evenly processed, thus guaranteeing the production of high-quality asphalt mixtures.
[0009] Optionally, multiple stirring racks are evenly fixed on the inner circumference of the stirring drum, and multiple stirring racks are arranged horizontally on the inner circumference of the stirring drum. An oil storage ring is fitted on the outer wall of the stirring drum, and the two ends of the oil storage ring are fixed to the outer wall of the stirring drum. Multiple heating rods are horizontally fixed inside the oil storage ring, and an insulation sleeve is fixed on the outer wall of the oil storage ring, with a toothed ring fixed in the middle of the outer wall of the insulation sleeve.
[0010] By adopting the above technical solution, and by setting multiple stirring racks uniformly fixed on the inner circumference of the mixing drum, as well as multiple rows of multi-piece stirring racks arranged laterally on the inner circumference of the mixing drum, these stirring racks can more thoroughly mix the materials during the mixing process, improving mixing efficiency and uniformity. Because the multi-directional distribution of the stirring racks can cover a larger area of the inner wall of the mixing drum, it ensures that the materials are thoroughly and uniformly mixed during the mixing process. By fitting an oil storage ring cylinder onto the outer wall of the mixing drum, using a heating rod to heat the inside of the oil storage ring cylinder, and fixing an insulation sleeve to the outer wall of the oil storage ring cylinder to enhance the insulation effect, the temperature inside and outside the oil storage ring cylinder is kept stable. Since the oil storage ring cylinder can effectively transfer heat to the inside of the mixing drum, the material inside the mixing drum receives continuous temperature control during the mixing process, thus playing a role in maintaining the temperature stability of the mixed materials.
[0011] Optionally, the bottom surface of the first rotating frame is rotatably connected to the top surface of the support frame, a support hydraulic cylinder is vertically arranged between the second rotating frame and the support frame, and the two ends of the support hydraulic cylinder are respectively hinged to the adjacent end faces of the second rotating frame and the support frame. A first drive motor is horizontally fixed on the outside of the second rotating frame, and a first drive gear is fixed at the output end of the first drive motor, and the first drive gear meshes with the gear ring.
[0012] By adopting the above technical solution, and by setting the bottom surface of the first rotating frame to be rotatably connected to the top surface of the support frame, and by vertically setting a support hydraulic cylinder between the second rotating frame and the support frame, the entire structure can achieve multi-stage rotation and leveling functions. The two ends of the support hydraulic cylinder are respectively hinged to the adjacent end faces of the second rotating frame and the support frame. The extension and retraction of the support hydraulic cylinder controls the lifting and lowering of the second rotating frame, thereby adjusting its height. Furthermore, a first drive motor is horizontally fixed to the outer side of the second rotating frame, and the first drive motor drives the first active gear to rotate. The first active gear meshes with a gear ring, driving the second rotating frame to rotate. This working principle uses the first drive motor to provide power, and the rotational movement of the second rotating frame is achieved through a gear transmission system, thus enabling the entire mechanism to achieve circumferential adjustment and movement.
[0013] Optionally, the preheating component includes a feed cylinder and a rotating drum. The feed cylinder is horizontally positioned at the feed end of the mixing drum, and the feed cylinder has an opening near the feed end of the mixing drum. The end of the feed cylinder is connected and fixed to the feed end of the mixing drum, and the rotating drum is sleeved through the middle of the feed cylinder. The two ends of the inner wall of the rotating drum are rotatably connected by sealed bearings, and a feeding screw is vertically connected and fixed to the top of the outer circumference of the rotating drum. The feeding screw is used to guide the asphalt material into the drum.
[0014] By adopting the above technical solution, firstly, the feed cylinder is horizontally positioned at the discharge end of the mixing drum, with an opening near the discharge end. This means that the material in the mixing drum can directly flow into the feed cylinder, where it undergoes preliminary preheating, improving the efficiency of subsequent processes. Secondly, the end of the feed cylinder is connected and fixed to the discharge end of the mixing drum, ensuring smooth material flow from the mixing drum to the feed cylinder and enhancing the material guiding effect. More importantly, a rotating drum is sleeved through the middle of the feed cylinder, allowing it to rotate around the feed cylinder and further uniformly preheat the passing material. The inner walls of the rotating drum are connected by sealed bearings at both ends, effectively preventing leakage and contamination during rotation and ensuring the system's airtightness.
[0015] Optionally, a feeding screw cylinder is vertically threaded into the top opening of the feeding screw tube, and multiple feeding slots are opened through the bottom surface of the feeding screw cylinder. A feeding rod is vertically rotatably connected inside the feeding screw cylinder, and multiple feeding plates are vertically fixed on the outer wall of the feeding rod. A feeding motor is vertically fixed on the bottom surface of the feeding screw cylinder, and the output end of the feeding motor is fixed on the bottom end surface of the feeding rod. A top cover is vertically inserted into the top of the feeding screw cylinder.
[0016] By adopting the above technical solution, and featuring a vertically threaded feeding screw inserted into the top opening of the feeding screw tube, the feeding screw tube, due to its unique design, can effectively achieve material concentration and control. Multiple discharge slots are formed on the bottom surface of the feeding screw tube, allowing material to fall evenly to the desired position as the feeding screw tube rotates, thus ensuring the uniformity and stability of material distribution. A feeding rod is vertically rotatably connected inside the feeding screw tube, and multiple feeding blades are fixed to the outer wall of the feeding rod. These blades effectively agitate and guide the material as the feeding rod rotates, ensuring unobstructed material flow inside the feeding screw tube. A feeding motor is vertically fixed to the bottom surface of the feeding screw tube, and the output end of the feeding motor is connected to the bottom end face of the feeding rod. The feeding motor controls the rotation of the feeding rod, thereby controlling the material conveying and distribution. When the feeding motor starts, the conveying speed and direction of the material can be flexibly controlled by controlling the rotation speed and direction of the feeding rod.
[0017] Optionally, an air inlet is provided on the other end face of the feed cylinder. The air inlet includes a combustion chamber box. A gas supply pipe is fixedly connected to the top surface of the combustion chamber box and is rotatably connected to the end of the feed cylinder. A jet plate is fixedly connected through both vertical end faces of the combustion chamber box and is connected to the gas pipeline. An igniter is fixedly fixed on the inner vertical end face of the jet plate. A gas guide pipe is fixedly connected to the bottom surface of the combustion chamber box and a gas pump is fixedly connected to the gas guide pipe.
[0018] By adopting the above technical solution, and by setting up an air intake component, the combustion chamber box within the air intake component can concentrate and control the combustion of the gas, thus optimizing the combustion process. The interior of the combustion chamber box is connected to the end of the feed cylinder pipe via a gas delivery pipe, ensuring that the gas can smoothly enter the combustion chamber box for combustion. The jet plate is connected to the gas pipeline, which allows the gas to be injected evenly and fully mixed with the flame generated by the igniter, improving combustion efficiency and effect. The igniter is located on the inner vertical end face of the jet plate, enabling precise ignition of the gas and ensuring a stable combustion process. The gas guide pipe leads the combusted gas out of the combustion chamber box, and further pressurizes it through an air pump, thereby improving the gas discharge efficiency.
[0019] Optionally, the mixing component includes a rotating shell, which is located inside the mixing drum near the discharge port. The rotating shell is rotatably connected to the inner wall of the mixing drum via a sealed bearing. Multiple stirring rings are arranged horizontally and vertically on the rotating shell in the direction of the feed end of the mixing drum. Multiple stirring teeth are evenly fixed on the multiple stirring rings. The adjacent ends of the multiple stirring rings are fixedly connected by a crossbar. The multiple stirring rings are fixedly connected to the rotating shell. The multiple stirring rings and the multiple stirring teeth inside the mixing drum are arranged horizontally and alternately.
[0020] By adopting the above technical solution and incorporating the rotating shell feature, the rotating shell, rotatably connected to the inner wall of the mixing drum via sealed bearings, can flexibly adjust its position and rotation angle within the mixing drum, thereby effectively improving the mixing uniformity of materials inside the mixing drum. By setting multiple stirring rings and uniformly fixed stirring teeth on them, with the rings fixedly connected to the rotating shell and adjacent ends connected by crossbars, these rings form a multi-layered stirring structure as the shell rotates. This increases the frequency and range of material contact and tumbling, resulting in deeper mixing and preventing localized dense or non-contact conditions during stirring. Simultaneously, the cross-arrangement of the multiple stirring rings and the multiple rows of stirring teeth inside the mixing drum creates a more uniform distribution of cutting and shearing forces during stirring. This ensures that the material is subjected not only to forces from the rotating shell and stirring rings but also to forces from the stirring teeth; the combination of these dual forces enhances stirring efficiency and mixing effect.
[0021] Optionally, a second drive motor is horizontally fixed on the outside of the mixing drum near the discharge port, and a second drive gear is fixed at the output end of the second drive motor.
[0022] By adopting the above technical solution, and by setting a second drive motor and a second driving gear, the second drive motor, by providing power to drive the second driving gear, can rotate. Specifically, the second drive motor fixes the second driving gear to its output end, so that the motor's power can be converted into the rotational motion of the gear. The second driving gear is installed on the outside of the mixing drum near the discharge end. When the second driving gear rotates, it can further drive the internal mixing blades or mixing device to rotate through the meshing action between the gears.
[0023] Optionally, teeth are vertically fixed on the outer wall of the rotating shell near the discharge port, and multiple teeth are evenly arranged on the outer wall of the rotating shell, and the teeth mesh with the second drive gear.
[0024] By adopting the above technical solution, and by setting teeth that mesh with the second driving gear, power can be transmitted during rotation. As the rotating housing rotates around its axis, the teeth rotate accordingly, meshing with the tooth grooves of the second driving gear. The contact pressure of the meshing surfaces transmits this rotational power to the second driving gear, thereby driving it to rotate as well. Since multiple teeth are evenly distributed on the outer wall of the rotating housing, this ensures more stable and uniform power transmission during rotation, resulting in a smoother and more reliable overall transmission process.
[0025] Optionally, a plug is inserted at the discharge port of the rotating shell, and an exhaust pipe is fixedly connected to the plug, and a valve is fixedly connected to the exhaust pipe.
[0026] By adopting the above technical solution, a plug and an exhaust pipe are installed. The plug is inserted into the discharge port of the rotating shell, and a valve is fixedly connected to the exhaust pipe. Specifically, the plug blocks the discharge port of the rotating shell to prevent material leakage, while the exhaust pipe connected to the plug allows gas flow, thus achieving the venting function during material discharge. The exhaust pipe is further equipped with a valve to control the gas flow and prevent material from overflowing with the gas during discharge. Due to the combined use of the plug and the exhaust pipe, when material needs to be discharged, the valve can be opened to allow gas to escape from the exhaust pipe, thereby reducing the pressure inside the rotating shell. In this way, the material can be discharged more easily from the discharge port. In addition, the presence of the valve effectively controls the gas flow, ensuring the safety and stability of the material discharge process, preventing material from overflowing with the gas, and thus protecting the safety of the equipment and operators.
[0027] In summary, this application includes at least one of the following beneficial technical effects:
[0028] 1. This technology utilizes a dual-drive structure with the mixing drum and mixing components rotating in opposite directions to achieve thorough shearing and mixing within the mixing chamber, effectively solving the problem of aggregate segregation. This technology abandons the traditional single-drive mode of mixing blades. A first drive motor drives the mixing drum to rotate forward, utilizing multiple annular stirring racks on the inner wall to tumble and lift the material along the drum wall. Simultaneously, a second drive motor drives the mixing component's rotating shell to rotate in the opposite direction, with multiple stirring rings on the shell penetrating deep into the material for radial shearing. The convective mixing field created by the bidirectional rotation causes the material to undergo a combined spiral ascent and radial diffusion motion within the mixing drum, completely covering the fixed blind spots such as the four corners and bottom center of traditional equipment. The material's movement trajectory within the mixing chamber has no repetitive dead zones, improving the mixing uniformity of coarse and fine aggregates and reducing the deviation in coarse aggregate content in segregated areas. By distributing and rotating the mixing rings in opposite directions, the mixing intensity is evenly distributed radially. The linear velocity of the mixing rings and the linear velocity of the ring mixing rack complement each other. The shear force deviation of the material at any radial position effectively avoids asphalt emulsification and solves road surface problems caused by uneven mixing.
[0029] 2. By constructing a graded system of pre-dispersion and preheating followed by uniform heating with heat transfer oil, precise temperature control of asphalt is achieved, avoiding aging imbalance. The asphalt raw material is first dispersed by the feeding rods within the feeding screw, then falls evenly from the discharge chute into the feed cylinder and loading screw, where it fully contacts and preheats with the hot air generated in the combustion chamber. The increased contact area between the dispersed asphalt raw material and the hot air avoids the point-contact overheating problem of traditional direct flame heating, laying a foundation for uniform temperature distribution during subsequent heating. After the preheated asphalt enters the mixing drum, multiple heating rods within the oil storage ring heat the heat transfer oil, and the heat is evenly transferred to the material through the mixing drum wall. The heat transfer efficiency of the heat transfer oil is improved compared to traditional flame heating, and the rotation of the mixing drum ensures continuous contact between the material and the wall, preventing localized heating; the annular structure of the oil storage ring ensures uniform temperature on the mixing drum wall. Attached Figure Description
[0030] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;
[0031] Figure 2 This is a schematic diagram of the overall structure of the embodiment of this application in an exploded state;
[0032] Figure 3 This is a schematic diagram of the structure of the support and stirring components in the disassembled state according to an embodiment of this application;
[0033] Figure 4 This is a schematic diagram of the structure of the stirring component in the decomposed state according to an embodiment of this application;
[0034] Figure 5 This is a schematic diagram of the support member in an exploded state according to an embodiment of this application;
[0035] Figure 6 This is a schematic diagram of the preheating component in the disassembled state according to an embodiment of this application;
[0036] Figure 7 This is a schematic diagram of the air intake component in the disassembled state according to an embodiment of this application;
[0037] Figure 8 This is a schematic diagram of the structure of the hybrid component in the disassembled state according to the embodiments of this application.
[0038] Explanation of reference numerals in the attached drawings: 1. Support component; 11. Support frame; 12. First rotating frame; 13. Second rotating frame; 14. First drive motor; 15. First drive gear; 16. Support hydraulic cylinder; 2. Agitator; 21. Agitator drum; 22. Agitator rack; 23. Oil storage ring; 24. Heating rod; 25. Insulation sleeve; 26. Gear ring; 27. Second drive motor; 28. Second drive gear; 3. Preheating component; 31. Feed cylinder 32. Pipe; 33. Rotary drum; 34. Feeding screw tube; 35. Feeding screw tube; 36. Feeding screw tube; 37. Discharge channel; 38. Feeding motor; 39. Feeding rod; 30. Top cover; 31. Air inlet; 32. Combustion chamber box; 33. Air guide pipe; 34. Air delivery pipe; 35. Jet plate; 46. Ignition device; 47. Mixing component; 48. Rotary shell; 49. Stirring ring; 40. Teeth; 41. Plug; 42. Exhaust pipe; 43. Valve. Detailed Implementation
[0039] The present application will be further described in detail below with reference to the accompanying drawings.
[0040] This application discloses an asphalt mixing device. (Refer to...) Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 8 An asphalt mixing device includes a support component 1, a mixing component 2, a preheating component 3, and a mixing component 4. The support component 1 includes a support frame 11, a first rotating frame 12, and a second rotating frame 13. The first rotating frame 12 and the second rotating frame 13 are symmetrically arranged above the support frame 11. The mixing component 2 includes a mixing drum 21, which is horizontally arranged above the support frame 11 and is horizontally rotatably connected to the first rotating frame 12 and the second rotating frame 13. The feed end of the mixing drum 21 is connected to and fixed with the preheating component 3, which is used to preheat the asphalt material. The discharge end of the mixing drum 21 is through which the mixing component 4 is inserted, and the mixing component 4 is used to mix the asphalt material.
[0041] By adopting the above technical solution, and through the technical features of the support frame 11, the first rotating frame 12, and the second rotating frame 13, these frames are stably supported by the support frame 11, enabling the mixing drum 21 to rotate horizontally, thereby achieving the overall stability of the equipment. The first rotating frame 12 and the second rotating frame 13 provide double support, ensuring the precise and stable rotation of the mixing drum 21 during high-speed mixing, thus enhancing the stability of the equipment and the uniformity of mixing, thereby achieving efficient preheating and mixing of the asphalt. The preheating component 3 is connected and fixed to the feed end of the mixing drum 21, allowing the asphalt to undergo preheating treatment before entering the mixing drum 21, thereby improving the fluidity of the asphalt, making the mixing more uniform, reducing the difficulty of mixing, and thus improving the overall mixing and stirring quality. In other words, the preheating treatment makes the asphalt easier to mix evenly with other materials, thereby improving the quality of the final asphalt mixture. The mixing component 4 is inserted through the inside of the mixing drum and works in conjunction with the mixing drum 21 to further mix the asphalt. The addition of mixing component 4 provides extra mixing power, ensuring uniform mixing of all materials and thus enhancing the mixing effect. This ensures the quality stability and uniformity of the asphalt mixture. In other words, the extra mixing power ensures that all materials are thoroughly and uniformly processed, thereby guaranteeing the production of high-quality asphalt mixtures.
[0042] Reference Figure 4Multiple stirring racks 22 are evenly fixed on the inner circumference of the mixing drum 21, and multiple rows of multiple stirring racks 22 are laterally arranged on the inner circumference of the mixing drum 21. An oil storage ring cylinder 23 is fitted on the outer wall of the mixing drum 21, and the two ends of the oil storage ring cylinder 23 are fixed to the outer wall of the mixing drum 21. Multiple heating rods 24 are horizontally fixed inside the oil storage ring cylinder 23. The electrical terminals of the multiple heating rods 24 are rotatably connected to the oil storage ring cylinder 23 through slip rings, and the electrical terminals of the slip rings are electrically connected to an external power supply line. A heat insulation sleeve 25 is fixed on the outer wall of the oil storage ring cylinder 23, and a toothed ring 26 is fixed in the middle of the outer wall of the heat insulation sleeve 25. By setting multiple stirring racks 22 evenly fixed on the inner circumference of the mixing drum 21, and multiple rows of multiple stirring racks 22 laterally arranged on the inner circumference of the mixing drum 21, these stirring racks can more fully mix the materials during the mixing process, improving the mixing efficiency and uniformity. Because the multi-directional distribution of the stirring rack 22 can cover a larger area of the inner wall of the mixing drum 21, it ensures that the material is thoroughly and evenly mixed during the mixing process. By fitting the oil storage ring 23 onto the outer wall of the mixing drum 21, heating the inside of the oil storage ring 23 using the heating rod 24, and fixing the heat-insulating sleeve 25 to the outer wall of the oil storage ring 23 to enhance the heat preservation effect, the temperature inside and outside the oil storage ring 23 is kept stable. Since the oil storage ring 23 can effectively transfer heat to the inside of the mixing drum 21, the material inside the mixing drum 21 is continuously temperature-controlled during the mixing process, thus playing a role in maintaining the temperature stability of the mixed material. The bottom surface of the first rotating frame 12 is rotatably connected to the top surface of the support frame 11. A support hydraulic cylinder 16 is vertically arranged between the second rotating frame 13 and the support frame 11, with both ends of the support hydraulic cylinder 16 hinged to the adjacent end faces of the second rotating frame 13 and the support frame 11, respectively. A first drive motor 14 is horizontally fixed to the outer side of the second rotating frame 13, and a first drive gear 15 is fixed to the output end of the first drive motor 14, meshing with a gear ring 26. By rotatably connecting the bottom surface of the first rotating frame 12 to the top surface of the support frame 11, and vertically arranging the support hydraulic cylinder 16 between the second rotating frame 13 and the support frame 11, the entire structure can achieve multi-stage rotation and leveling functions. The two ends of the support hydraulic cylinder 16 are hinged to the adjacent end faces of the second rotating frame 13 and the support frame 11, and the lifting and lowering of the second rotating frame 13 is controlled by the telescopic movement of the support hydraulic cylinder 16, thereby adjusting the height of the second rotating frame 13. Furthermore, a first drive motor 14 is horizontally fixed to the outer side of the second rotating frame 13, and the first drive motor 14 drives the first drive gear 15 to rotate. The first drive gear 15 meshes with the gear ring 26, causing the second rotating frame 13 to rotate. The first drive motor 14 provides the power source, and the rotational movement of the second rotating frame 13 is realized through the gear transmission system, so that the entire mechanism can achieve adjustment and movement in the circumferential direction.
[0043] Reference Figure 6The preheating component 3 includes a feed cylinder 31 and a rotating drum 32. The feed cylinder 31 is horizontally positioned at the discharge end of the mixing drum 21, with an opening near the discharge end. The end of the feed cylinder 31 is connected and fixed to the discharge end of the mixing drum 21, and the rotating drum 32 is sleeved through the middle of the feed cylinder 31. The two ends of the inner wall of the rotating drum 32 are rotatably connected via sealed bearings, and a feeding screw pipe 33 is vertically connected and fixed to the top of the outer circumference of the rotating drum 32. The feeding screw pipe 33 is used to guide the asphalt material into the drum. Firstly, the feed cylinder 31 is horizontally positioned at the discharge end of the mixing drum 21, with an opening near the discharge end. This means that the material in the mixing drum 21 can directly flow into the feed cylinder 31. After entering this channel, the material undergoes preliminary preheating, improving the efficiency of subsequent processes. Secondly, the end of the feed cylinder 31 is connected and fixed to the outlet end of the mixing drum 21, ensuring that the material flows smoothly from the mixing drum 21 to the feed cylinder 31, enhancing the material guiding effect. More importantly, a rotating drum 32 is sleeved through the middle of the feed cylinder 31, allowing the drum 32 to rotate around the feed cylinder 31, thereby achieving further uniform preheating of the passing material. The inner walls of the drum 32 are connected by sealed bearings at both ends, effectively preventing leakage and contamination during rotation, ensuring the system's airtightness.
[0044] Reference Figure 6 and Figure 7A feeding screw cylinder 34 is vertically threaded into the top opening of the feeding screw tube 33, and multiple discharge slots 341 are formed through the bottom surface of the feeding screw cylinder 34. A feeding rod 343 is vertically rotatably connected inside the feeding screw cylinder 34, and multiple feeding blades are vertically fixed on the outer wall of the feeding rod 343. A feeding motor 342 is vertically fixed on the bottom surface of the feeding screw cylinder 34, and the output end of the feeding motor 342 is fixed to the bottom end face of the feeding rod 343. A top cover 35 is vertically inserted into the top of the feeding screw cylinder 34. By setting the technical feature of vertically threading the feeding screw cylinder 34 into the top opening of the feeding screw tube 33, the feeding screw cylinder 34, due to its unique design, can effectively realize the concentration and control of materials. Multiple feeding slots 341 are formed on the bottom surface of the feeding screw barrel 34, allowing materials to fall evenly to the desired position through the feeding slots 341 when the feeding screw barrel 34 rotates, thus ensuring the uniformity and stability of material distribution. A feeding rod 343 is vertically rotatably connected inside the feeding screw barrel 34, and multiple feeding blades are fixed on the outer wall of the feeding rod 343. These feeding blades effectively agitate and guide the material when the feeding rod 343 rotates, ensuring unobstructed flow of material inside the feeding screw barrel 34. A feeding motor 342 is vertically fixed on the bottom surface of the feeding screw barrel 34. The output end of the feeding motor 342 is connected to the bottom end face of the feeding rod 343. The feeding motor 342 controls the rotation of the feeding rod 343, thereby controlling the conveying and distribution of materials. When the feeding motor 342 starts, the conveying speed and direction of the material can be flexibly controlled by controlling the rotation speed and direction of the feeding rod 343. An air inlet 36 is provided on the other end face of the feed cylinder 31. The air inlet 36 includes a combustion chamber box 361. A gas supply pipe 363 is fixedly connected to the top surface of the combustion chamber box 361 and is rotatably connected to the end of the feed cylinder 31. Injector plates 364 are fixedly connected through both vertical end faces of the combustion chamber box 361 and are connected to the gas pipeline. An igniter 365 is fixedly fixed to the inner vertical end face of the injector plate 364. A gas guide pipe 362 is fixedly connected to the bottom surface of the combustion chamber box 361 and is connected to a gas pump. By providing the air inlet 36, the combustion chamber box 361 within the air inlet 36 can concentrate and control the combustion of the gas, thus optimizing the combustion process. The interior of the combustion chamber box 361 is connected to the end of the feed cylinder 31 via the gas supply pipe 363, thereby ensuring that the gas can smoothly enter the combustion chamber box 361 for combustion. The jet plate 364 is connected to the gas pipeline, which allows the gas to be injected evenly and fully mixed with the flame generated by the igniter 365, improving combustion efficiency and effect. The igniter 365 is located on the inner vertical end face of the jet plate 364, which can accurately ignite the gas and ensure stable combustion. The gas guide pipe 362 leads the combusted gas out of the combustion chamber box 361, and further pressurizes it through the air pump, thereby improving the gas discharge efficiency.
[0045] Reference Figure 4 and Figure 8The mixing component 4 includes a rotating shell 41, which is disposed inside the mixing drum 21 near the discharge port. The rotating shell 41 is rotatably connected to the inner wall of the mixing drum 21 via a sealed bearing. Multiple stirring rings 42 are arranged horizontally and vertically on the rotating shell 41 towards the feed end of the mixing drum 21. Multiple stirring teeth are evenly fixed on each stirring ring 42. Adjacent ends of the stirring rings 42 are fixedly connected by a crossbar, and the stirring rings 42 are fixedly connected to the rotating shell 41. The stirring rings 42 and the multiple stirring racks 22 inside the mixing drum 21 are arranged horizontally in a staggered manner. By incorporating the rotating shell 41, which is rotatably connected to the inner wall of the mixing drum 21 via a sealed bearing, its position and rotation angle within the mixing drum can be flexibly adjusted, thereby effectively improving the mixing uniformity of the materials inside the mixing drum 21. By setting multiple stirring rings 42 and uniformly fixed stirring teeth on them, the stirring rings 42 are fixedly connected to the rotating shell 41 and adjacent ends are fixedly connected by crossbars. These stirring rings 42 can form a multi-layered stirring structure as the rotating shell 41 rotates, increasing the frequency and range of material contact and tumbling, thereby stirring and mixing the materials more thoroughly and avoiding localized dense or non-contact conditions during the stirring process. At the same time, since the multiple stirring rings 42 and the multiple multi-bladed stirring racks 22 inside the stirring drum 21 are arranged laterally in a staggered manner, this staggered design makes the cutting and shearing forces generated during the stirring process more evenly distributed. This means that the material is subjected not only to the forces from the rotating shell and stirring rings, but also to the forces from the stirring racks during the stirring process. The combination of these dual forces enhances the stirring efficiency and mixing effect. A second drive motor 27 is horizontally fixed on the outside of the stirring drum 21 near the discharge port, and a second drive gear 28 is fixed to the output end of the second drive motor 27. By setting a second drive motor 27 and a second drive gear 28, the second drive motor 27 provides power to drive the second drive gear 28 to rotate. Specifically, the second drive motor 27 fixes the second drive gear 28 to its output end, so that the motor's power can be converted into the rotational motion of the gear. The second drive gear 28 is installed on the outside of the mixing drum 21 near the discharge end. When the second drive gear 28 rotates, it can further drive the internal mixing blades or mixing device to rotate through the meshing action between the gears. A tooth 43 is vertically fixed on the outer wall of the rotating shell 41 near the discharge port, and multiple teeth 43 are evenly arranged on the outer wall of the rotating shell 41, and the teeth 43 mesh with the second drive gear 28. By setting the teeth 43, the teeth 43 can mesh with the second drive gear 28 to transmit power during rotation. The specific working principle is as follows: when the rotating shell 41 rotates around the axis, the teeth 43 rotate accordingly and mesh with the tooth groove of the second driving gear 28. The contact pressure of the meshing surface transmits this rotational power to the second driving gear 28, thereby driving the second driving gear 28 to rotate together.Because multiple teeth 43 are evenly distributed on the outer wall of the rotating shell 41, the power transmission during rotation is more stable and uniform, resulting in a smoother and more reliable overall transmission process. A plug 44 is inserted into the discharge port of the rotating shell 41, and an exhaust pipe 45 is fixedly connected to the plug 44. A valve 46 is fixedly connected to the exhaust pipe 45. Specifically, the plug 44 blocks the discharge port of the rotating shell 41 to prevent material leakage, while the exhaust pipe 45 allows gas flow, thus achieving the venting function during material discharge. The exhaust pipe 45 is further equipped with a valve 46, which controls the gas flow and prevents material from overflowing with the gas during discharge. Due to the combined use of the plug 44 and the vent pipe 45, when material needs to be discharged, the valve 46 can be opened to allow gas to escape from the vent pipe 45, thereby reducing the pressure inside the rotating shell 41. This allows the material to be discharged more easily from the discharge port. Furthermore, the presence of the valve 46 effectively controls the gas flow, ensuring safety and stability during material discharge, preventing material from overflowing with the gas, and thus protecting the safety of the equipment and operators.
[0046] The implementation principle of an asphalt mixing plant according to an embodiment of this application is as follows:
[0047] First, the plug 44 is inserted into the discharge port of the rotating shell 41 of the mixing component 4, and the valve 46 on the exhaust pipe 45 is closed. Then, the feeding screw cylinder 34 is threaded onto the top of the feeding screw tube 33 in the preheating component 3. The asphalt raw material is fed into the feeding screw cylinder 34, and the feeding motor 342 is started to drive the feeding rod 343 to rotate in the feeding screw cylinder 34. The paddle on the rotating feeding rod 343 pushes the asphalt raw material to disperse and fall from the discharge channel 341. The dispersed asphalt raw material moves vertically downward in the feeding screw tube 33 into the feed cylinder 31. At the same time, the support hydraulic cylinder 16 on the support frame 11 is activated to extend, pushing the mixing drum 21 supported on the first rotating frame 12 and the second rotating frame 13 to tilt towards the discharge end. Finally, the falling asphalt raw material is guided through the tilted feed cylinder 31. The asphalt material falls into the mixing drum 21. After all the asphalt material has entered the mixing drum 21, the support hydraulic cylinder 16 on the support frame 11 is activated to extend and push the mixing drum 21 supported on the first rotating frame 12 and the second rotating frame 13 to keep it in a horizontal state. In order to preheat the asphalt material, the air pump on the air guide pipe 362 on the bottom surface of the combustion chamber box 361 in the air intake component 36 is activated to drive air into the combustion chamber box 361. The igniter 365 on the jet plate 364 mixes the gas and air and ignites it to generate hot air. The hot air flows into the feed cylinder pipe 31 and the feeding screw pipe 33. The hot air contacts the asphalt material for preheating. The asphalt material is directly in contact with the hot air during mixing and the asphalt material is heated. The valve 46 on the exhaust pipe 45 is opened to discharge the air in the mixing drum 21.
[0048] Then, after the asphalt raw material is added, the top cover 35 is sealed and inserted into the top of the feeding screw cylinder 34. The added asphalt raw material flows into the interior of the mixing drum 21. The multiple heating rods 24 inside the oil storage ring cylinder 23 are activated to heat the heat transfer oil inside the oil storage ring cylinder 23. The heat from the heat transfer oil is transferred to the asphalt raw material inside the mixing drum 21 through the wall. In order to ensure the heating and mixing uniformity of the asphalt raw material, the first drive motor 14 is activated to drive the first drive gear 15 to rotate forward. The first drive gear 15 meshes with the toothed ring 26 on the outer wall of the oil storage ring cylinder 23, driving the mixing drum 21 to rotate in the first rotating frame 12. The asphalt raw material is stirred and dispersed in the second rotating frame 13 in the forward direction. The multiple annular stirring racks 22 on the inner wall are used to stir and disperse the asphalt raw material, which is fully in contact with the inner wall of the mixing drum 21 to heat the asphalt raw material. At the same time, the second drive motor 27 on the outer wall of the mixing drum 21 is started to drive the second drive gear 28 to rotate in the reverse direction, which meshes with the stirring ring 42 on the outer wall of the rotating shell 41, causing the rotating shell 41 to rotate in the reverse direction in the mixing drum 21. The multiple stirring rings 42 on the rotating shell 41 stir and disperse the asphalt raw material to be fully heated. By using the forward and reverse rotation of the mixing drum 21 and the mixing component 4, the asphalt raw material is dispersed and sheared to be fully heated.
[0049] Finally, after the asphalt mixture is mixed, the stopper 44 is opened to activate the support hydraulic cylinder 16 on the support frame 11 to extend, pushing the mixing drum 21 supported on the first rotating frame 12 and the second rotating frame 13 to tilt vertically downward toward the discharge end, so that the asphalt mixture is completely discharged from the mixing drum 21 under the action of gravity. At the same time, in order to accelerate the discharge of the asphalt mixture, the air intake component 36 is activated to increase the air pressure in the mixing drum 21 to completely discharge the asphalt mixture.
[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. An asphalt mixing plant, characterized in that The utility model provides a bituminous material mixing device, including support (1), stirring part (2), preheating part (3) and mixing part (4), the support (1) includes support frame (11), first rotation frame (12) and second rotation frame (13), the first rotation frame (12) and second rotation frame (13) are symmetrically arranged on the top of support frame (11), the stirring part (2) includes stirring cylinder (21), the stirring cylinder (21) is horizontally arranged on the top of support frame (11), and the stirring cylinder (21) is rotatably connected in the first rotation frame (12) and second rotation frame (13), the preheating part (3) is fixedly connected in the feeding end of stirring cylinder (21), and the preheating part (3) is used for preheating treatment to bituminous material, the mixing part (4) is inserted into the inside and is penetrated at the discharging end of stirring cylinder (21), and the mixing part (4) is used for stirring treatment to bituminous material.
2. An asphalt mixing plant according to claim 1, characterised in that: The inner circumferential surface of stirring cylinder (21) is uniformly provided with a plurality of stirring racks (22), and the inner circumferential surface of stirring cylinder (21) is transversely provided with a plurality of stirring racks (22), the outer wall of stirring cylinder (21) is sleeved with an oil storage ring cylinder (23), and the two ends of oil storage ring cylinder (23) are fixed on the outer wall of stirring cylinder (21), a plurality of heating rods (24) are fixed horizontally in the inside of oil storage ring cylinder (23), and a heat preservation sleeve (25) is fixed on the outer wall of oil storage ring cylinder (23), and a gear ring (26) is fixed on the middle part of the outer wall of heat preservation sleeve (25).
3. An asphalt mixing plant according to claim 2, characterised in that: The bottom surface of first rotation frame (12) is rotatably connected with the top surface of support frame (11), a supporting hydraulic cylinder (16) is vertically arranged between second rotation frame (13) and support frame (11), and the two ends of supporting hydraulic cylinder (16) are respectively hinged on the adjacent end surfaces of second rotation frame (13) and support frame (11), a first driving motor (14) is fixed horizontally on the outer side of second rotation frame (13), a first driving gear (15) is fixed on the output end of first driving motor (14), and the first driving gear (15) is engaged with gear ring (26).
4. An asphalt mixing plant according to claim 1, characterised in that: The preheating part (3) includes a feeding cylinder pipe (31) and a rotating cylinder (32), the feeding cylinder pipe (31) is horizontally arranged at the feeding end of stirring cylinder (21), and the feeding cylinder pipe (31) is arranged with an opening close to the feeding end of stirring cylinder (21), the end of feeding cylinder pipe (31) is fixedly connected with the feeding end of stirring cylinder (21), and the middle part of feeding cylinder pipe (31) is sleeved with rotating cylinder (32), the two ends of the inner wall of rotating cylinder (32) are rotatably connected through sealing bearings, and an upper feeding screw pipe (33) is fixedly connected with the top of the outer circumferential surface of rotating cylinder (32) in a vertical manner, and the upper feeding screw pipe (33) is used for guiding bituminous material.
5. An asphalt mixing plant according to claim 4, characterised in that: The top opening of the feeding screw tube (33) is vertically threaded with a poking screw cylinder (34), a plurality of discharging through slots (341) are through-provided on the bottom surface of the poking screw cylinder (34), a poking rod (343) is vertically rotatably connected inside the poking screw cylinder (34), a plurality of poking pieces are vertically fixed on the outer wall of the poking rod (343), a poking motor (342) is vertically fixed on the bottom surface of the poking screw cylinder (34), the output end of the poking motor (342) is fixed on the bottom end surface of the poking rod (343), and a top cover (35) is vertically inserted on the top end of the poking screw cylinder (34).
6. An asphalt mixing plant according to claim 4, characterised in that: The other end surface of the feeding cylinder tube (31) is provided with an air inlet part (36), the air inlet part (36) comprises a combustion cavity box (361), a gas conveying pipe (363) is fixedly and communicatively provided on the top surface of the combustion cavity box (361), the gas conveying pipe (363) is rotatably communicated with the end of the feeding cylinder tube (31), a gas injection plate (364) is fixedly and through-provided on the vertical end surface of each side of the combustion cavity box (361), the gas injection plate (364) is assembled in communication with a gas pipeline, a igniter (365) is fixed on the inner vertical end surface of the gas injection plate (364), a gas guide pipe (362) is fixedly and communicatively provided on the bottom surface of the combustion cavity box (361), and a gas pump is fixedly and communicatively provided on the gas guide pipe (362).
7. An asphalt mixing plant according to claim 2, characterised in that: The mixing part (4) comprises a rotating shell (41), which is arranged inside the stirring cylinder (21) and close to one side of the discharging port, and is rotatably connected to the inner wall of the stirring cylinder (21) through a sealing bearing, a plurality of stirring ring pieces (42) are vertically arranged in the direction of the feeding end of the stirring cylinder (21) and close to one side of the discharging port, a plurality of stirring tooth pieces are uniformly fixed on each of the stirring ring pieces (42), the adjacent ends of the stirring ring pieces (42) are fixedly connected through cross bars, the stirring ring pieces (42) are fixedly connected with the rotating shell (41), and the stirring ring pieces (42) and the plurality of stirring tooth strips (22) inside the stirring cylinder (21) are transversely and staggeringly arranged.
8. An asphalt mixing plant according to claim 7, characterised in that: A second driving motor (27) is horizontally fixed on one side of the discharging port of the stirring cylinder (21), and a second driving gear (28) is fixed on the output end of the second driving motor (27).
9. An asphalt mixing plant according to claim 8, characterised in that: A plurality of tooth gears (43) are vertically fixed on the outer wall of the rotating shell (41) and close to one side of the discharging port, and are in engagement with the second driving gear (28).
10. An asphalt mixing plant according to claim 9, characterised in that: A plug (44) is inserted at the discharging port of the rotating shell (41), an exhaust pipe (45) is fixedly and communicatively provided on the plug (44), and a valve (46) is fixedly and communicatively provided on the exhaust pipe (45).