A multi-layer stirring gradient cooling integrated asphalt stirring device

Abstract

The application provides a multi-layer stirring gradient cooling integrated asphalt stirring device, and relates to the technical field of asphalt production. The device comprises a stirring drum, a partition disc, a discharging port, a stirring area, a cooling area, a discharging seat, a connecting shaft, a stirring part one and a flow guide shell. The partition disc, the flow guide shell, the annular blowing pipe and the fan blade are cooperatively designed to make the stirring area concentrate the discharged material and the cooling area uniformly receive the material, so that the material sequentially experiences three stages of thinning and dispersing air cooling, folding and uniform guiding and bottom stirring heat removal on the falling path in the cooling area, gradient cooling from top to bottom is formed, local overheating and cooling dead angles are effectively avoided, and the cooling uniformity and efficiency are improved.

Description

Technical Field

[0001] This invention relates to the field of asphalt production technology, and in particular to an integrated asphalt mixing equipment with multi-layer mixing gradient cooling. Background Technology

[0002] In the asphalt production process, it is usually necessary to mix and stir raw materials such as curing agents, asphalt liquid, and aggregates in a certain proportion. Most existing mixing equipment adopts a centralized discharge method, that is, the material after mixing is directly poured from the discharge port into the cooling zone or a separate collection container. This easily forms a thick layer of accumulation. Since the heat of the material inside the accumulation is difficult to dissipate, a sandwich phenomenon of external cooling and internal heating can easily occur. Local overheating can even affect the quality of the finished asphalt. At the same time, because the material is concentrated and unevenly distributed, the subsequent cooling process is difficult to effectively cool the inside of the accumulation, often requiring a longer cooling time, resulting in reduced production efficiency and increased energy consumption. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a multi-layer mixing gradient cooling integrated asphalt mixing equipment that can overcome or at least partially solve the above problems.

[0004] To solve the above-mentioned technical problems, the present invention provides a multi-layer mixing and gradient cooling integrated asphalt mixing device, including a mixing drum with an open top, and further comprising: a partition plate fixedly connected to the inner wall of the mixing drum, the interior of the mixing drum being divided into a mixing zone and a cooling zone by the partition plate, a discharge port being provided at the center of the partition plate, and a discharge seat communicating with the interior of the cooling zone being provided on the surface of the mixing drum; a connecting shaft rotatably disposed between the bottom and the interior of the mixing drum, one end of the connecting shaft being provided with a drive unit for driving the connecting shaft to rotate, and a mixing part located inside the mixing zone being provided on the surface of the connecting shaft; a guide shell movable up and down along the surface of the connecting shaft, correspondingly disposed directly below the discharge port and located inside the cooling zone; when the guide shell moves upward to abut against the inner wall of the discharge port, the mixing zone and the cooling zone are isolated; when the guide shell moves downward to form a preset gap with the bottom of the partition plate, the mixing zone and the cooling zone are in communication; and a cooling component disposed in the cooling zone for gradient cooling of the material as it slides from the surface of the guide shell to the bottom of the cooling zone.

[0005] In some implementations, a semi-circular top plate is fixedly connected to the top of the mixing drum, and a semi-circular flap is hinged to one side of the semi-circular top plate.

[0006] In some implementations, the partition plate has a bowl-shaped structure that is wider at the top and narrower at the bottom. The top center of the flow guide shell has a circular protrusion. The outer diameter of the flow guide shell gradually increases from the top to the middle and gradually decreases from the middle to the bottom. A gap is reserved between the lower part of the flow guide shell and the inner wall of the cooling zone to form an annular gap channel.

[0007] In some implementations, the stirring part includes a U-shaped rod fixedly connected to the connecting shaft, and a crossbar is fixedly connected between the U-shaped rod and the surface of the connecting shaft.

[0008] In some implementations, a support frame is fixedly connected to the surface of the stirring drum, and the driving unit includes a driving part one mounted on the support frame. A pulley one is fixedly connected to the output end of the driving part one. A matching belt is connected to the surface of the pulley one. A matching pulley two is connected to the inner surface of the belt. The pulley two is fixedly connected to one end of the connecting shaft located at the bottom of the stirring drum.

[0009] In some implementations, a pair of mirror-symmetrical horizontal mounting plates are fixedly connected to the surface of the stirring tank. A second drive unit is installed at the bottom of the horizontal mounting plates. A horizontal connecting block is fixedly connected to the output end of the second drive unit. A vertical rod is fixedly connected to the top of the horizontal connecting block. One end of the vertical rod located inside the cooling zone is fixedly connected to the bottom of the guide shell.

[0010] In some implementations, the cooling assembly includes an air guide tube fixedly connected to the bottom of the mixing drum. The air guide tube is sleeved on the surface of the connecting shaft. An air inlet pipe and an air outlet pipe are connected to the surface of the air guide tube. Multiple circumferentially distributed guide vanes are attached to the inner wall of the air guide tube. The guide vanes are fixedly connected to the surface of the connecting shaft. An annular blower pipe is fixedly connected to one end of the air outlet pipe that extends to the cooling zone. Several circumferentially distributed nozzles are distributed on the surface of the annular blower pipe.

[0011] In some implementations, the nozzle is tilted towards the upper section of the guide shell, the annular air blower is arranged around the bottom periphery of the partition plate and located above the guide shell, and multiple fixing rods are fixedly connected between the annular air blower and the inner wall of the cooling zone.

[0012] In some implementations, the flow guide shell has a cavity inside, and the bottom of the flow guide shell has a circular opening that communicates with the cavity. Multiple fan blades that are circumferentially distributed and located inside the cavity are fixedly connected to the surface of the connecting shaft.

[0013] In some implementations, the surface of the connecting shaft is fixedly connected with multiple circumferential guide rods located below the opening. The guide rods are semi-circular rod-shaped structures, and they are close to the bottom of the cooling zone and correspond to the slot of the material feed seat located inside the cooling zone.

[0014] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: This invention, by setting up a liftable guide shell that corresponds vertically to a bowl-shaped dividing plate, allows the uniformly mixed material in the mixing zone to naturally gather along the dividing plate towards the central discharge port, and then orderly disperse and slide down through the gradually changing outer wall of the guide shell. This avoids the material directly piling up at the bottom of the cooling zone. This design perfectly connects the centralized discharge in the mixing zone with the uniform receiving in the cooling zone, eliminating cooling dead zones and overheating risks caused by local accumulation from the source. At the same time, it achieves spatial separation and continuous flow between the mixing and cooling processes, without interference between them.

[0015] Meanwhile, the gradually expanding outer wall of the guide shell from the upper to the middle causes the material to spread out during its descent, greatly increasing the contact area between the material and the airflow. Combined with the inclined nozzle of the annular blower pipe, forced air cooling from the side and above is achieved, realizing efficient external cooling of the material during its descent. The annular gap channel formed between the gradually narrowing outer wall of the guide shell from the middle to the lower part and the inner wall of the cooling zone gradually gathers the dispersed material and guides it evenly to the bottom of the cooling zone. Combined with the fan blades that rotate synchronously with the connecting shaft, the material at the bottom of the cooling zone is cooled by secondary air blowing, and the hot air is discharged through the discharge seat. Overall, the material goes through three stages in sequence on its descent path: spreading and dispersing air cooling, gathering and even guiding, and bottom stirring and heat dissipation. This, together with the upper air blowing cooling of the annular blower pipe and the air blowing and heat dissipation of the fan blades, forms a gradient cooling from top to bottom, effectively avoiding local overheating and cooling dead zones, and improving cooling uniformity and efficiency. Attached Figure Description

[0016] In the attached diagram: Figure 1 A schematic diagram of the overall structure of an integrated asphalt mixing equipment with multi-layer mixing gradient cooling provided in an embodiment of the present invention. Figure 1 ; Figure 2 A schematic diagram of the overall structure of an integrated asphalt mixing equipment with multi-layer mixing gradient cooling provided in an embodiment of the present invention. Figure 2 ; Figure 3 For the present invention Figure 1 A top view of the structure of the mixing drum; Figure 4 For the present invention Figure 2 Cross-sectional view of the middle stirring tank Figure 1 ; Figure 5 For the present invention Figure 4 Schematic diagram of the abutment connection structure between the central guide shell and the separator disk; Figure 6 For the present invention Figure 2 Cross-sectional view of the middle stirring tank Figure 2 ; Figure 7 For the present invention Figure 6 Schematic diagram of the separation and connection structure between the central guide shell and the separator disk; Figure 8 For the present invention Figure 6 A schematic diagram of the connection structure between the central annular blower and the mixing drum.

[0017] In the diagram: 1. Mixing drum; 11. Mixing zone; 12. Cooling zone; 13. Discharge seat; 14. Semi-circular top plate; 15. Semi-circular flap; 2. Divider plate; 21. Discharge port; 3. Connecting shaft; 31. U-shaped rod; 32. Horizontal bar; 33. Guide rod; 4. Flow guide shell; 41. Horizontal mounting plate; 42. Drive unit two; 43. Horizontal connecting block; 44. Vertical rod; 45. Cavity; 46. Circular opening; 47. Fan blade; 5. Support frame; 51. Drive unit one; 52. Belt pulley one; 53. Belt; 54. Belt pulley two; 6. Air guide tube; 61. Air inlet pipe; 62. Air outlet pipe; 63. Guide blade; 64. Annular blowing pipe; 65. Nozzle; 66. Fixing rod. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0019] like Figures 1-7 As shown, a multi-layer mixing gradient cooling integrated asphalt mixing equipment includes a mixing drum 1 with an open top. A partition plate 2 is fixedly connected to the inner wall of the mixing drum 1. The interior of the mixing drum 1 is divided into an upper mixing zone 11 and a lower cooling zone 12 by the partition plate 2. A discharge port 21 is opened at the center of the partition plate 2. The partition plate 2 has a bowl-shaped structure that is wider at the top and narrower at the bottom. This structure is used to allow the material in the mixing zone 11 to naturally gather towards the central discharge port 21 after being mixed evenly, reducing residue. A discharge seat 13 communicating with the interior of the cooling zone 12 is opened on the surface of the mixing drum 1. The discharge seat 13 is inclined, with the inclined surface facing the lower outer side of the mixing drum 1. A semi-circular top plate 14 is fixedly connected to the top of the mixing drum 1. A semi-circular flap 15 is hinged to one side of the semi-circular top plate 14 for opening when adding material and closing when mixing.

[0020] To achieve mixing of materials in mixing zone 11, such as... Figures 3-7As shown, the connecting shaft 3 is rotatably disposed between the bottom and the interior of the mixing drum 1. One end of the connecting shaft 3 is provided with a drive unit for driving the connecting shaft 3 to rotate. The surface of the connecting shaft 3 is provided with a stirring part 1 located inside the stirring zone 11. The stirring part 1 includes a U-shaped rod 31 fixedly connected to the connecting shaft 3. A crossbar 32 is fixedly connected between the U-shaped rod 31 and the surface of the connecting shaft 3. A support frame 5 is fixedly connected to the surface of the mixing drum 1. The drive unit includes a drive part 1 51 mounted on the support frame 5. A pulley 1 52 is fixedly connected to the output end of the drive part 1 51. A matching belt 53 is connected to the surface of the pulley 1 52. A matching pulley 2 54 is connected to the inner surface of the belt 53. The pulley 2 54 is fixedly connected to the end of the connecting shaft 3 located at the bottom of the mixing drum 1.

[0021] To ensure that the material is stirred before cooling, such as Figures 4-5 As shown, a guide shell 4 that can move up and down along the surface of the connecting shaft 3 is correspondingly provided below the discharge port 21 and inside the cooling zone 12. A pair of mirror-symmetrical horizontal mounting plates 41 are fixedly connected to the surface of the stirring drum 1. A second drive unit 42 is installed at the bottom of the horizontal mounting plate 41. A horizontal connecting block 43 is fixedly connected to the output end of the second drive unit 42. A vertical rod 44 is fixedly connected to the top of the horizontal connecting block 43. One end of the vertical rod 44 located inside the cooling zone 12 is fixedly connected to the bottom of the guide shell 4. During operation, the second drive unit 42, which is driven by a cylinder, drives the horizontal... The vertical rod 44 on the connecting block 43 pushes the guide shell 4 upward until it abuts against the inner wall of the discharge port 21. At this time, the stirring zone 11 and the cooling zone 12 are isolated. Then, the semi-circular flap 15 at the top of the stirring drum 1 is opened, and the material is put into the stirring zone 11 at the top of the stirring drum 1. Then, the drive unit 51 using the servo motor is started to drive the pulley 52 to rotate. The pulley 52 then drives the pulley 54 to rotate through the belt 53, which in turn drives the U-shaped rod 31 and the crossbar 32 on the connecting shaft 3 to uniformly stir the material in the stirring zone 11.

[0022] like Figures 6-7 and Figure 8As shown, after stirring is completed, the second drive unit 42 drives the vertical rod 44 on the horizontal connecting block 43 to push the guide shell 4 downward until a preset gap is formed between it and the bottom of the separator plate 2. At this point, the stirring zone 11 and the cooling zone 12 are in communication. The cooling zone 12 is equipped with a cooling component for gradient cooling of the material as it slides from the surface of the guide shell 4 to the bottom of the cooling zone 12. The cooling component includes a guide tube 6 fixedly connected to the bottom of the stirring drum 1. The guide tube 6 is sleeved on the surface of the connecting shaft 3. The surface of the guide tube 6 is connected to an air inlet pipe 61 and an air outlet pipe 62. The inner wall of the guide tube 6 is fitted with multiple circumferentially distributed guide vanes 63. A ring-shaped air blower 64 is fixedly connected to one end of the air outlet 62 extending to the cooling zone 12. Several circumferentially distributed nozzles 65 are distributed on the surface of the ring-shaped air blower 64. The nozzles 65 are inclined towards the upper section of the guide shell 4. The ring-shaped air blower 64 is arranged around the bottom periphery of the partition plate 2 and located above the guide shell 4. Several fixing rods 66 are fixedly connected between the ring-shaped air blower 64 and the inner wall of the cooling zone 12. A cavity 45 is opened inside the guide shell 4. A circular opening 46 communicating with the cavity 45 is opened at the bottom of the guide shell 4. Several circumferentially distributed fan blades 47 located inside the cavity 45 are fixedly connected to the surface of the connecting shaft 3.

[0023] In the above technical solution, since the upper outer diameter of the guide shell 4 is larger than the diameter of the discharge port 21, when the guide shell 4 moves down to maintain a certain distance from the discharge port 21, the material in the stirring zone 11 falls into the top of the guide shell 4 through the discharge port 21 of the partition plate 2, and then slides down along the gradually increasing outer wall of the guide shell 4 from the upper part to the middle. This spreading and dispersing process makes the material form a thin layer, which helps to cooperate with the annular blower 64 for efficient cooling.

[0024] Specifically, the connecting shaft 3 rotates continuously, driving the guide vane 63 to draw external cold air into the air guide tube 6 through the air inlet pipe 61, and then into the annular blower 64 through the air outlet pipe 62. Finally, the inclined nozzle 65 blows the thin layer of material that has slid down the upper section of the guide shell 4 from the side and above, so that the material can obtain efficient external cooling within a limited falling path and time, thereby avoiding the problem of the material sticking together into clumps due to excessive accumulation and affecting the cooling effect.

[0025] After the material slides down to the middle of the guide shell 4, the outer diameter of the guide shell 4 gradually decreases from the middle to the bottom. An annular gap channel is formed between the lower section of the guide shell 4 and the inner wall of the cooling zone 12. The design of this annular gap channel allows the material dispersed from the upper section of the guide shell 4 to naturally gather along the annular gap channel, smoothly transitioning from a dispersed state to an aggregated state. This guides the material evenly, continuously, and quantitatively to the bottom of the cooling zone 12. The advantages of this are that, on the one hand, it can prevent the material from stacking up disorderly due to sudden falling, preventing the formation of new cooling dead zones from the source. On the other hand, it helps to cooperate with the fan blades 47 that rotate synchronously with the connecting shaft 3 to perform secondary air blowing cooling on the material entering the bottom of the cooling zone 12. At the same time, the hot air generated in the cooling zone 12 is discharged through the discharge seat 13 to avoid the retention of hot air.

[0026] like Figure 7 As shown, multiple circumferential guide rods 33 are fixedly connected to the surface of the connecting shaft 3 and are located below the opening. The guide rods 33 are semi-circular rod-shaped structures. The guide rods 33 are close to the bottom of the cooling zone 12 and correspond to the slot of the feed seat 13 located inside the cooling zone 12. When the connecting shaft 3 rotates, the guide rods 33 rotate with the connecting shaft 3, which can disperse and flatten the material falling into the bottom of the cooling zone 12. On the one hand, it increases the contact area between the material and the airflow, so that the material can cooperate more fully with the fan blades 47 to achieve secondary cooling. On the other hand, it continuously pushes the cooled material into the slot of the feed seat 13 to ensure continuous and uniform discharge.

[0027] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A multi-layer mixing gradient cooling integrated asphalt mixing device, comprising a mixing drum (1) with an open top, characterized in that, Also includes: A partition plate (2) is fixedly connected to the inner wall of the mixing drum (1). The interior of the mixing drum (1) is divided into a mixing zone (11) and a cooling zone (12) by the partition plate (2). A discharge port (21) is provided at the center of the partition plate (2). A discharge seat (13) communicating with the interior of the cooling zone (12) is provided on the surface of the mixing drum (1). A connecting shaft (3) is rotatably disposed between the bottom and the interior of the stirring drum (1). One end of the connecting shaft (3) is provided with a driving unit for driving the connecting shaft (3) to rotate. The surface of the connecting shaft (3) is provided with a stirring part located inside the stirring zone (11). A guide shell (4) that can move up and down along the surface of the connecting shaft (3) is correspondingly disposed directly below the discharge port (21) and inside the cooling zone (12); When the guide shell (4) moves upward to abut against the inner wall of the discharge port (21), the stirring zone (11) and the cooling zone (12) are isolated. When the guide shell (4) moves downward to form a preset gap with the bottom of the separator plate (2), the stirring zone (11) and the cooling zone (12) are in a connected state; And a cooling assembly, disposed within the cooling zone (12), for gradient cooling of the material as it slides from the surface of the guide shell (4) to the bottom of the cooling zone (12); The cooling assembly includes an air guide tube (6) fixedly connected to the bottom of the stirring drum (1). The air guide tube (6) is sleeved on the surface of the connecting shaft (3). The surface of the air guide tube (6) is connected to an air inlet pipe (61) and an air outlet pipe (62). The inner wall of the air guide tube (6) is fitted with a plurality of circumferentially distributed guide vanes (63). The guide vanes (63) are fixedly connected to the surface of the connecting shaft (3). The end of the air outlet pipe (62) extending to the cooling zone (12) is fixedly connected to an annular blower pipe (64). The surface of the annular blower pipe (64) is distributed with a plurality of circumferentially distributed nozzles (65). The flow guide shell (4) has a cavity (45) inside, and a circular opening (46) communicating with the cavity (45) is opened at the bottom of the flow guide shell (4). Multiple fan blades (47) are fixedly connected to the surface of the connecting shaft (3) and are distributed circumferentially and located inside the cavity (45).

2. The multi-layer mixing gradient cooling integrated asphalt mixing equipment according to claim 1, characterized in that, The top of the mixing drum (1) is fixedly connected to a semi-circular top plate (14), and a semi-circular flap (15) is hinged to one side of the semi-circular top plate (14).

3. The multi-layer mixing gradient cooling integrated asphalt mixing equipment according to claim 1, characterized in that, The partition plate (2) has a bowl-shaped structure that is wider at the top and narrower at the bottom. The top center of the flow guide shell (4) has a circular protrusion structure. The outer diameter of the flow guide shell (4) gradually increases from the top to the middle and gradually decreases from the middle to the bottom. A gap is reserved between the lower part of the flow guide shell (4) and the inner wall of the cooling zone (12) to form an annular gap channel.

4. The multi-layer mixing gradient cooling integrated asphalt mixing equipment according to claim 1, characterized in that, The stirring part includes a U-shaped rod (31) fixedly connected to the connecting shaft (3), and a crossbar (32) is fixedly connected between the U-shaped rod (31) and the surface of the connecting shaft (3).

5. The multi-layer mixing gradient cooling integrated asphalt mixing equipment according to claim 4, characterized in that, The surface of the stirring drum (1) is fixedly connected to a support frame (5). The driving unit includes a driving part (51) mounted on the support frame (5). The output end of the driving part (51) is fixedly connected to a pulley (52). The surface of the pulley (52) is connected to a matching belt (53). The inner surface of the belt (53) is connected to a matching pulley (54). The pulley (54) is fixedly connected to one end of the connecting shaft (3) located at the bottom of the stirring drum (1).

6. The multi-layer mixing gradient cooling integrated asphalt mixing equipment according to claim 1, characterized in that, A pair of mirror-symmetrical horizontal mounting plates (41) are fixedly connected to the surface of the stirring tank (1). A second drive unit (42) is installed at the bottom of the horizontal mounting plate (41). A horizontal connecting block (43) is fixedly connected to the output end of the second drive unit (42). A vertical rod (44) is fixedly connected to the top of the horizontal connecting block (43). One end of the vertical rod (44) located inside the cooling zone (12) is fixedly connected to the bottom of the guide shell (4).

7. The multi-layer mixing gradient cooling integrated asphalt mixing equipment according to claim 1, characterized in that, The nozzle (65) is tilted towards the upper section of the guide shell (4), the annular blow pipe (64) is arranged around the bottom periphery of the partition plate (2) and located above the guide shell (4), and multiple fixing rods (66) are fixedly connected between the annular blow pipe (64) and the inner wall of the cooling zone (12).

8. The multi-layer mixing gradient cooling integrated asphalt mixing equipment according to claim 1, characterized in that, The surface of the connecting shaft (3) is fixedly connected with a plurality of circumferential guide rods (33) located below the opening. The guide rods (33) are semi-circular rod-shaped structures. The guide rods (33) are close to the bottom of the groove of the cooling zone (12) and correspond to the groove of the feed seat (13) located inside the cooling zone (12).

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