Grinding device and process for preparing SBS modified asphalt

Abstract

The invention discloses a grinding device and process for preparing SBS modified asphalt, and relates to the technical field of grinding devices.The grinding device comprises a rack, a stator, a rotor and a driving mechanism; the stator is mounted on the rack, and a grinding cavity is formed in the stator; the rotor is rotationally arranged in the grinding cavity, and the driving mechanism is used for driving the rotor to rotate; a plurality of turbulent flow grooves are formed in the periphery of the rotor, the turbulent flow grooves extend in the axial direction of the rotor, and stirring assemblies are arranged in the turbulent flow grooves; a self-adaptive transmission assembly used for driving the stirring assembly to rotate is further arranged in the turbulent flow groove, and the stirring assembly is driven by the self-adaptive transmission assembly to rotate so as to promote flowing of materials entering the turbulent flow groove. According to the invention, materials are forcibly mixed in the turbulent flow groove, so that asphalt with different viscosities is homogenized, and the accuracy of sampling detection results is ensured.

Description

Technical Field

[0001] This invention relates to the field of grinding equipment technology, specifically to a grinding device and process for preparing SBS modified asphalt. Background Technology

[0002] Asphalt grinding (usually referring to the grinding process in the production of modified asphalt SBS) is a crucial step in the production of modified asphalt. Through grinding, polymers (such as SBS, SBR, etc.) are uniformly dispersed in the base asphalt, thereby altering the physical and chemical properties of the asphalt to meet the requirements of high-grade road construction.

[0003] Asphalt grinding is typically performed using grinding equipment, such as the asphalt grinding mixer disclosed in CN214687363U. This mixer includes a mixing tank with an inlet at the top and an outlet at the bottom. A rotating column rotates inside the tank, and a motor is mounted on the tank to drive the rotating column. A mixing blade is fixed to the upper part of the rotating column, and a grinding media (referred to as the rotor in this application) is fixed to the lower part. A grinding chamber (referred to as the stator in this application) is located at the bottom of the mixing tank. Both the grinding media and the grinding chamber are frustum-shaped, and a gap exists between the sidewall of the grinding media and the inner wall of the grinding chamber. Current grinding equipment grinds asphalt by the interaction between the grinding media and the inner wall of the grinding chamber.

[0004] In existing technology, SBS particles and asphalt matrix enter between the grinding media and the inner wall of the grinding chamber. The rotation of the grinding media generates shear force on the asphalt matrix and SBS particles to achieve the grinding effect on the asphalt. However, during the grinding process, the SBS particles may not swell sufficiently, resulting in some asphalt having high viscosity and some having low viscosity. High-viscosity and low-viscosity asphalt are prone to stratification, which makes it difficult to obtain accurate test results during sampling. Furthermore, high-viscosity asphalt has high shear stress, which can cause local overheating if it accumulates in a localized area of ​​the grinding equipment, thus affecting the service life of the grinding equipment. Summary of the Invention

[0005] The purpose of this invention is to provide a grinding apparatus and process for preparing SBS modified bitumen, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a grinding device for preparing SBS modified bitumen, comprising a frame, a stator, a rotor, and a drive mechanism; The stator is mounted on the frame, and a grinding chamber is provided inside the stator; The rotor is rotatably disposed within the grinding chamber, and the driving mechanism is used to drive the rotor to rotate. The rotor has several turbulence grooves around its periphery, which extend along the axial direction of the rotor, and agitation components are provided inside the turbulence grooves. The turbulent flow tank is also equipped with an adaptive transmission component for driving the agitation component to rotate. The agitation component rotates under the drive of the adaptive transmission component to promote the flow of material entering the turbulent flow tank.

[0007] Furthermore, the adaptive transmission component includes a rotating shaft and a pinion. The rotor has a receiving groove. The rotating shaft is rotatably connected to the rotor and one end of the rotating shaft extends into the receiving groove. The pinion is fixedly fitted onto the end of the rotating shaft that extends into the receiving groove. A fixed ring gear is fixed on the frame, and the pinion meshes with the fixed ring gear.

[0008] Furthermore, the agitation assembly includes a tubular portion and a toothed portion fixed to the periphery of the tubular portion; The tubular part is fitted onto the rotating shaft, and an elastic floating connection structure is provided between the rotating shaft and the tubular part; The rotating shaft drives the tubular part to rotate through the elastic floating connection structure, and allows the tubular part to undergo radial or axial displacement relative to the rotating shaft; The length direction of the toothed portion is consistent with the length direction of the tubular portion. When the toothed portion rotates, it is used to agitate the material in the turbulent channel and drive the material to flow towards the outlet direction of the turbulent channel.

[0009] Furthermore, the elastic floating connection structure includes a spring, a guide portion, and a protrusion. The guide portion is fixed to the periphery of the rotating shaft, and the end face of the guide portion is provided with a mounting groove; The protrusion is fixed to the inner wall of the tubular part, the protrusion extends into the mounting groove, and the outer diameter of the protrusion is smaller than the inner diameter of the mounting groove. The spring is located in the mounting groove, with one end of the spring abutting against the bottom of the mounting groove and the other end abutting against the inner wall of the protrusion or the tubular part.

[0010] Furthermore, the rotor has an extension extending toward the interior of the turbulence channel, the extension and the inner wall of the turbulence channel are in an arc-shaped transition, and the side of the extension that extends into the turbulence channel is sharp.

[0011] Furthermore, the rotor is provided with an arc-shaped segment around its periphery, the arc surface of the arc-shaped segment facing the outside of the rotor, the extension and the arc-shaped segment respectively corresponding to the two sides opposite to the longitudinal section of the turbulence channel, and the arc surface of the arc-shaped segment is tangent to the inner wall of the turbulence channel.

[0012] Furthermore, the end faces at both ends of the rotor axial direction close the two ends of the turbulent channel, and the two ends of the rotating shaft are respectively rotatably connected to the two ends of the rotor axial direction through bearings. There is a flow space for material flow between the toothed part and the inner wall of the turbulent channel.

[0013] Furthermore, a connecting chamber is connected to the top of the stator, and a feeding chamber is connected to the top of the connecting chamber; The upper end of the rotor is coaxially connected to a follow-rotating column, which extends to the lower opening of the feeding hopper. A spiral section is provided around the periphery of the follow-rotating column, which rotates with the rotor and conveys the material to the grinding chamber.

[0014] Furthermore, the outer diameter of the rotor decreases sequentially from top to bottom, the inner wall of the stator is adapted to the rotor, and the gap between the side wall of the grinding chamber and the periphery of the rotor is no greater than 0.5 mm.

[0015] A grinding method for SBS modified bitumen, applied to the grinding apparatus described above, includes the following steps: The swollen SBS is mixed with asphalt to form an asphalt mixture, and the asphalt mixture is transported to the feeding hopper of the grinding device; Start the drive mechanism, which drives the rotor to rotate. The rotor's rotation drives the rotating column and the spiral section to rotate, conveying the asphalt mixture to the grinding chamber. The rotor rotates in the grinding chamber to shear and grind the asphalt mixture. At the same time, under the action of pressure difference, some of the asphalt mixture enters the turbulence groove around the rotor. The asphalt mixture entering the turbulent channel is mixed and homogenized under the action of turbulence, and flows towards the arc section by the rotation and stirring of the agitator. The homogenized asphalt mixture is thrown out of the arc section into the grinding chamber for further grinding under the impetus of centrifugal force and agitation components, and finally discharged through the outlet.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, the material is forcibly mixed in the turbulent tank, which homogenizes asphalt of different viscosities, thereby ensuring the accuracy of the sampling test results. The problem of high viscosity and low viscosity asphalt stratification caused by insufficient SBS swelling in the prior art is solved in this solution by the turbulent effect in the turbulent tank. In addition, through the combined action of shearing, extrusion and cavitation: when the rotor rotates, the asphalt mixture enters the turbulent tank rapidly under the action of pressure difference. Since the sharp end of the extension can generate cavitation bubbles when rotating, the bursting of the bubbles generates shock waves, which help to disperse the SBS polymer. This upgrades the device from simply relying on the shearing action of the rotor and stator gap to the combined action of "shearing, extrusion and cavitation", and the crushing efficiency increases exponentially. 2. In this invention, if high-viscosity asphalt accumulates in a localized area, it will generate large shear stress, leading to localized overheating. This solution uses the rotation of the agitator (toothed part) to force the material in the turbulent channel to be transported to the grinding chamber, avoiding the "dead zone" phenomenon of high-viscosity asphalt, preventing localized overheating, and thus extending the service life of the grinding equipment; 3. In this invention, the stirring component is mounted on the rotating shaft through an elastic floating connection structure (spring, protrusion, mounting groove). When the toothed part encounters great resistance while shearing high-viscosity asphalt, the tubular part can undergo radial or axial displacement relative to the rotating shaft to achieve a "knife-yielding" effect. This avoids overheating and wear caused by hard friction and protects the internal transmission components. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a grinding device for preparing SBS modified asphalt according to the present invention. Figure 2 This is a schematic diagram showing the positional relationship between the feeding bin, the connecting bin, and the stator after assembly in this invention; Figure 3 for Figure 2 A schematic diagram showing the positional relationship of the middle section after it has been cut open; Figure 4 for Figure 2 Schematic diagram of the positional relationships of the central structure after explosive decomposition; Figure 5 This is a schematic diagram showing the positional relationship between the rotating column, the helical section, and the rotor after assembly in this invention; Figure 6 for Figure 5 A schematic diagram showing the positional relationship of the structure from another perspective; Figure 7 This is a schematic diagram showing the positional relationship of the rotor, tubular part and rotating shaft after assembly in this invention; Figure 8 This is a schematic diagram showing the positional relationship between the tubular part, the toothed part, and the rotating shaft after assembly in this invention. Figure 9 for Figure 8 A schematic diagram showing the positional relationship of the middle section after it has been cut open; Figure 10 for Figure 9 A magnified schematic diagram of the positional relationship of the local structure at point A.

[0018] The following are the annotations for each item in the figure: 1. Frame; 2. Motor; 3. Gearbox; 4. Mounting base; 5. Discharge port; 6. Stator; 7. Connecting bin; 8. Feeding bin; 9. Following column; 10. Spiral section; 11. Grinding chamber; 12. Rotor; 13. Arc-shaped section; 14. Shaft; 15. Tubular section; 16. Fixed ring gear; 17. Pinion; 18. Receiving groove; 19. Toothed section; 20. Turbulent flow groove; 21. Extension section; 22. Guide section; 23. Protrusion; 24. Mounting groove; 25. Spring. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-10 This invention provides a technical solution: a grinding device for preparing SBS modified asphalt, comprising a frame 1, a mounting base 4 mounted on the column of the frame 1, a stator 6 vertically mounted on the upward-facing end face of the mounting base 4, a motor 2 vertically mounted on the frame 1, the motor shaft of the motor 2 being driven and connected to an output shaft via a gearbox 3, the upper end of the output shaft passing through the stator 6 and rotatably connected to the stator 6, a rotor 12 being provided inside the stator 6, the motor shaft of the motor 2 being driven and connected to the rotor 12, the outer diameter of the rotor 12 decreasing sequentially from top to bottom, the inner wall of the stator 6 being adapted to the rotor 12, and a grinding chamber 11 being formed between the inner wall of the stator 6 and the periphery and upper end face of the rotor 12, the gap between the side wall of the grinding chamber 11 and the periphery of the rotor 12 being no more than 0.5 mm, a connecting chamber 7 being coaxially connected to the top of the stator 6, the connecting chamber 7 having a tubular structure, its inner cavity being connected to the grinding chamber 11. In this configuration, the top of the connecting chamber 7 is connected to the feeding chamber 8 via screws, and the feeding chamber 8 and the connecting chamber 7 are also in a connected state. Preferably, the outer contour of the feeding chamber 8 is constricted from top to bottom. The mixture of SBS swelled and asphalt is transported to the feeding chamber 8 by an external metering pump, and then enters the connecting chamber 7 from the feeding chamber 8. Under the action of gravity, it enters the grinding chamber 11 from the connecting chamber 7. The motor 2 is started, and the motor shaft of the motor 2 rotates, thereby driving the rotor 12 to rotate, so that the rotor 12 can grind the asphalt mixture entering the grinding chamber 11 and provide shear force to grind the asphalt mixture. In addition, the stator 6 has a discharge port 5 with the opening tilted downward. The discharge port 5 is connected to an external collection device through a pipeline. At the same time, a control valve (not shown in the figure) can also be installed on the discharge port 5 to control the discharge of the ground asphalt in the grinding chamber 11. Combined with the diagram Figures 3 to 6 As shown, and with particular attention to 4, a follower column 9 is coaxially fixed to the upper end of the rotor 12. The outer diameter of the follower column 9 is smaller than the inner diameter of the connecting chamber 7, and the upper end of the follower column 9 extends to the lower opening of the feeding chamber 8. A spiral section 10 is provided around the periphery of the follower column 9. This spiral section 10 functions as a screw conveyor in the prior art. That is, when the rotor 12 rotates, the follower column 9 rotates synchronously. As the follower column 9 rotates, the spiral section 10 rotates, conveying the asphalt mixture in the feeding chamber 8 to the grinding chamber 11. This prevents the asphalt mixture from being conveyed within the feeding chamber 8. The obstruction can lead to blockages and affect the feeding process. In addition, the nominal diameter of the spiral section 10 is matched with the inner diameter of the connecting chamber 7, which makes the gap between the peripheral wall of the spiral section 10 and the inner wall of the connecting chamber 7 small, or even zero. This prevents SBS in the asphalt mixture from getting stuck between the inner wall of the connecting chamber 7 and the peripheral wall of the spiral section 10. Furthermore, the upper space of the grinding chamber 11 (i.e., the space between the upper end face of the rotor 12 and the top wall of the stator 6) is large, allowing the asphalt mixture to enter the side walls of the grinding chamber 11 through this upper space. Combination Figures 4 to 7 As shown, and please refer to the following: Figure 4 Multiple turbulence grooves 20 are formed around the periphery of the rotor 12. The length direction of the turbulence grooves 20 corresponds to the axial direction of the rotor 12, such as... Figure 7 As shown, the rotor 12 has an extension 21 extending towards the inner cavity of the turbulence groove 20. The extension 21 and the inner wall of the turbulence groove 20 form an arc-shaped transition. When the rotor 12 rotates and grinds the asphalt mixture in the grinding chamber 11, a large pressure difference is generated when the asphalt mixture extends to one side of the turbulence groove 20. That is, the pressure of the asphalt mixture outside the rotor 12 is much greater than that of the asphalt mixture inside the turbulence groove 20. This causes the asphalt mixture between the outer periphery of the rotor 12 and the inner wall of the grinding chamber 11 to rush into the turbulence groove 20 under the action of a large pressure difference. During the rushing process, the asphalt mixture in the turbulence groove 20... The mixture will generate turbulence. Under the action of turbulence, the high viscosity asphalt mixture and the low viscosity asphalt mixture will be forcibly mixed, so that the asphalt mixture can be homogenized. In addition, the side of the extension 21 that extends into the turbulence channel 20 is relatively sharp. This means that when the sharp end of the extension 21 rotates in the asphalt mixture, it will generate cavitation bubbles to a certain extent. When the bubbles burst, they will generate shock waves, which will further help to disperse the SBS polymer and thus improve the homogenization effect. Therefore, compared with the existing technology that simply relies on the rotor 12 for grinding, the simple shearing action can be upgraded to a composite action of shearing, extrusion and cavitation, and the crushing efficiency will increase exponentially. like Figure 7As shown, when the rotor 12 is cut radially, the extension 21 causes the turbulence channel 20 to extend radially inward toward the rotor 12. The side wall of the extension 21 facing the inner side of the turbulence channel 20 is arc-shaped and smoothly transitions to the inner wall of the turbulence channel 20. This reduces the flow resistance of the asphalt mixture within the turbulence channel 20. The longitudinal section of the turbulence channel 20 is arc-shaped. Furthermore, the rotor 12 has an arc-shaped segment 13 around its periphery that connects to the inner wall of the turbulence channel 20. The arc-shaped segment 13 and the extension 21 correspond to opposite sides of the arc-shaped cross-section of the turbulence channel 20. The arc surface of section 3 faces the outer periphery of rotor 12, and the arc surface of arc section 13 is tangent to the inner wall of turbulent channel 20. This allows the asphalt mixture to be homogenized in turbulent channel 20 and then thrown into grinding chamber 11 at high speed by the arc surface of arc section 13 under the centrifugal force of rotor 12 rotation. This allows for continued grinding after homogenization. When sampling, since high viscosity asphalt and low viscosity asphalt are homogenized, large errors can be prevented during sampling. In addition, the resistance of the arc surface of arc section 13 when the asphalt mixture is thrown into grinding chamber 11 is small. Combination Figures 4 to 10 As shown, and please refer to the following: Figures 7 to 10 To prevent the formation of "dead zones" within the turbulence channel 20—that is, to prevent excessive shear stress in the high-viscosity asphalt from being easily thrown into the grinding chamber 11—in this embodiment, the axial ends of the rotor 12 are designed to be closed. Specifically, the end faces of the rotor 12 along its axial direction close the ends of the turbulence channel 20. In other words, the ends of the turbulence channel 20 do not penetrate the end faces of the rotor 12 along its axial direction. Furthermore, a rotating shaft 14 is installed within the turbulence channel 20, with its two ends rotatably connected to the axial ends of the rotor 12 via bearings. The axial direction of the shaft 14 is parallel to the axial direction of the rotor 12. A tubular part 15 is fitted around the periphery of the shaft 14. The inner diameter of the tubular part 15 is larger than the outer diameter of the shaft 14, so that there is a certain gap between the inner wall of the tubular part 15 and the periphery of the shaft 14. Multiple toothed parts 19 are fixedly connected around the periphery of the tubular part 15. The length of the toothed parts 19 is consistent with the length direction of the tubular part 15, and the toothed parts 19 can rotate freely in the turbulent channel 20. There is a flow space between the toothed parts 19 and the inner wall of the turbulent channel 20 for the flow of asphalt mixture. Combination Figures 4 to 10 As shown, and please refer to the following: Figures 7 to 10Multiple guide portions 22 are uniformly fixed to the periphery of the rotating shaft 14. The axial direction of the guide portions 22 is perpendicular to the axial direction of the rotating shaft 14, and the end face of the guide portion 22 is coaxially provided with a mounting groove 24 extending onto the rotating shaft 14. A protrusion 23 is fixed to the inner wall of the tubular portion 15. The protrusion 23 corresponds one-to-one with the guide portion 22, and the end of the protrusion 23 away from the inner wall of the tubular portion 15 passes into the mounting groove 24. The outer diameter of the protrusion 23 is smaller than the inner diameter of the mounting groove 24. This allows the protrusion 23 to move freely in multiple directions within the mounting groove 24, or in other words, allows the tubular portion 15 to move to a certain extent along its axial and radial directions. Furthermore, the protrusion 23 will not detach from the mounting groove 24 because when the protrusion 23 moves outward from the mounting groove 24, the protrusions 23 in other directions will move inward from the mounting groove 24. This allows the protrusion 23 to move in multiple directions within the mounting groove 24, but it will not detach from the mounting groove 24. A spring 25 is installed in the mounting groove 24. The two ends of the spring 25 elastically abut against the inner wall of the mounting groove 24 and the inner wall of the tubular part 15, respectively. The spring 25 is provided so that, in its natural state, the tubular part 15 and the rotating shaft 14 can be coaxial (or nearly coaxial). like Figure 6 As shown, a recessed receiving groove 18 is coaxially formed at the end of the rotor 12 with the largest outer diameter (or the end of the rotor 12 facing the motor 2). The end of the rotating shaft 14 corresponding to the end with the largest outer diameter of the rotor 12 passes through the receiving groove 18 and is fixedly fitted with a pinion 17. A fixed ring gear 16 is connected to the wall of the mounting base 4 by screws. The fixed ring gear 16 is meshed with all the pinions 17. This allows the pinions 17 to mesh with the fixed ring gear 16 when the rotor 12 rotates. Since the fixed ring gear 16 is stationary on the mounting base 4, the pinions 17 will rotate. When the pinions 17 rotate, they synchronously drive the rotating shaft 14 to rotate, thereby causing the protrusion 23 to be blocked by the inner wall of the mounting groove 24, so that the protrusion 23 and the rotating shaft 14 rotate synchronously, thereby allowing the tubular part 15 to rotate. When the tubular part 15 rotates, it drives the toothed part 19 on the periphery of the tubular part 15 to rotate, thereby driving the asphalt mixture in the turbulent channel 20. Under the agitation of the toothed part 19, the asphalt mixture flows towards the arc section 13, thus forcibly conveying the asphalt mixture in the turbulent channel 20 to the grinding chamber 11. This reduces the "dead zone" phenomenon of high-viscosity asphalt in the turbulent channel 20. Furthermore, since the protrusion 23 can move relative to the rotating shaft 14 in multiple directions, when the toothed part 19 is shearing high-viscosity asphalt, if the shear stress is large, the toothed part 19 can achieve a "deflection" effect through the movement of the protrusion 23, avoiding the large friction generated when the toothed part 19 is shearing high-viscosity asphalt, which would lead to overheating and wear of the toothed part 19.

[0021] Working principle of the invention: An external metering pump delivers the asphalt mixture formed by the swollen SBS and asphalt to the feeding hopper 8, and then from the feeding hopper 8 into the connecting hopper 7. Under the action of gravity, it enters the grinding chamber 11 from the connecting hopper 7. The motor 2 is started, and the motor shaft of the motor 2 rotates, which in turn drives the rotor 12 to rotate, so that the rotor 12 can grind the asphalt mixture entering the grinding chamber 11 and provide shear force, thereby grinding the asphalt mixture. During the grinding process, the rotor 12 is driven to rotate by the motor 2, which causes the pinion 17 to mesh with the fixed ring gear 16. Since the fixed ring gear 16 is stationary on the mounting base 4, the pinion 17 will rotate. When the pinion 17 rotates, it synchronously drives the rotating shaft 14 to rotate, which causes the protrusion 23 to be blocked by the inner wall of the mounting groove 24, so that the protrusion 23 and the rotating shaft 14 rotate synchronously, which in turn allows the tubular part 15 to rotate. When the tubular part 15 rotates, it will drive the toothed part 19 on the periphery of the tubular part 15 to rotate. When the toothed section 19 rotates, the asphalt mixture in the grinding chamber 11 enters the extension section 21. Due to the pressure difference, the asphalt mixture will enter the turbulent channel 20 for forced mixing. Through the stirring of the toothed section 19, the mixture is well homogeneous. Through the pushing of the toothed section 19 and the centrifugal force of the rotor 12, the asphalt mixture will enter the arc surface of the arc section 13 from the flow space and then be thrown into the grinding chamber 11 for grinding. Since the high viscosity asphalt and low viscosity asphalt are forcibly homogenized, the high viscosity asphalt will not accumulate in local positions, which would cause the rotor 12 to overheat locally.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A grinding apparatus for preparing SBS modified bitumen, characterized in that, It includes a frame (1), a stator (6), a rotor (12), and a drive mechanism; The stator (6) is mounted on the frame (1), and the stator (6) is provided with a grinding chamber (11). The rotor (12) is rotatably disposed in the grinding chamber (11), and the driving mechanism is used to drive the rotor (12) to rotate; The rotor (12) has several turbulence grooves (20) around its periphery. The turbulence grooves (20) extend along the axial direction of the rotor (12), and a stirring component is provided in the turbulence grooves (20). The turbulent flow tank (20) is also provided with an adaptive transmission component for driving the agitation component to rotate. The agitation component rotates under the drive of the adaptive transmission component to promote the flow of material entering the turbulent flow tank (20).

2. The grinding apparatus for preparing SBS modified bitumen according to claim 1, characterized in that, The adaptive transmission assembly includes a rotating shaft (14) and a pinion (17). The rotor (12) has a receiving groove (18). The rotating shaft (14) is rotatably connected to the rotor (12) and one end of the rotating shaft (14) extends into the receiving groove (18). The pinion (17) is fixedly fitted on one end of the rotating shaft (14) that extends into the receiving groove (18). A fixed ring gear (16) is fixed on the frame (1). The pinion (17) meshes with the fixed ring gear (16).

3. The grinding apparatus for preparing SBS modified bitumen according to claim 1, characterized in that, The agitation assembly includes a tubular portion (15) and a toothed portion (19) fixed to the periphery of the tubular portion (15). The tubular part (15) is fitted onto the rotating shaft (14), and an elastic floating connection structure is provided between the rotating shaft (14) and the tubular part (15); The rotating shaft (14) drives the tubular part (15) to rotate through the elastic floating connection structure, and allows the tubular part (15) to undergo radial or axial displacement relative to the rotating shaft (14); The length direction of the toothed part (19) is consistent with the length direction of the tubular part (15). When the toothed part (19) rotates, it is used to agitate the material in the turbulent channel (20) and drive the material to flow toward the outlet direction of the turbulent channel (20).

4. A grinding apparatus for preparing SBS modified bitumen according to claim 3, characterized in that, The elastic floating connection structure includes a spring (25), a guide (22), and a protrusion (23). The guide part (22) is fixed to the periphery of the rotating shaft (14), and the end face of the guide part (22) is provided with a mounting groove (24). The protrusion (23) is fixed to the inner wall of the tubular part (15), the protrusion (23) extends into the mounting groove (24), and the outer diameter of the protrusion (23) is smaller than the inner diameter of the mounting groove (24); The spring (25) is located in the mounting groove (24), with one end of the spring (25) abutting the bottom of the mounting groove (24) and the other end abutting the protrusion (23) or the inner wall of the tubular part (15).

5. A grinding apparatus for preparing SBS modified asphalt according to claim 1, characterized in that... The rotor (12) has an extension (21) extending toward the interior of the turbulence channel (20) around its periphery. The extension (21) and the inner wall of the turbulence channel (20) are in an arc transition shape. The side of the extension (21) that extends into the turbulence channel (20) is sharp.

6. A grinding apparatus for preparing SBS modified bitumen according to claim 5, characterized in that, The rotor (12) is also provided with an arc segment (13) around its periphery. The arc surface of the arc segment (13) faces the outside of the rotor (12). The extension (21) and the arc segment (13) correspond to the opposite sides of the longitudinal section of the turbulence channel (20). The arc surface of the arc segment (13) is tangent to the inner wall of the turbulence channel (20).

7. A grinding apparatus for preparing SBS modified asphalt according to claim 3, characterized in that, The end faces of the rotor (12) at both ends of the axial direction close the two ends of the turbulent groove (20). The two ends of the rotating shaft (14) are rotatably connected to the two ends of the rotor (12) through bearings. There is a flow space for material flow between the toothed part (19) and the inner wall of the turbulent groove (20).

8. A grinding apparatus for preparing SBS modified bitumen according to claim 1, characterized in that, The top of the stator (6) is connected to a connecting chamber (7), and the top of the connecting chamber (7) is connected to a feeding chamber (8). The upper end of the rotor (12) is coaxially connected to a follower column (9), which extends to the lower opening of the feeding hopper (8). A spiral section (10) is provided around the periphery of the follower column (9). The spiral section (10) rotates with the rotor (12) and conveys the material to the grinding chamber (11).

9. A grinding apparatus for preparing SBS modified bitumen according to claim 1, characterized in that, The outer diameter of the rotor (12) decreases sequentially from top to bottom. The inner wall of the stator (6) is adapted to the rotor (12). The gap between the side wall of the grinding chamber (11) and the periphery of the rotor (12) is no greater than 0.5 mm.

10. A method for grinding SBS modified bitumen, applied to the grinding apparatus described in any one of claims 1 to 9, characterized in that, Includes the following steps: The swollen SBS is mixed with asphalt to form an asphalt mixture, and the asphalt mixture is transported to the feeding hopper of the grinding device (8). Start the drive mechanism, which drives the rotor (12) to rotate. The rotation of the rotor (12) drives the rotating column (9) and the spiral section (10) to rotate, thus conveying the asphalt mixture to the grinding chamber (11). The rotor (12) rotates in the grinding chamber (11) to shear and grind the asphalt mixture. At the same time, under the action of pressure difference, part of the asphalt mixture enters the turbulent groove (20) around the rotor (12). The asphalt mixture entering the turbulent channel (20) is mixed and homogenized under the action of turbulence, and flows towards the arc section (13) by the rotation and stirring of the stirring component; After homogenization, the asphalt mixture is thrown out from the arc section (13) into the grinding chamber (11) for further grinding under the impetus of centrifugal force and stirring components, and finally discharged through the discharge port (5).

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