A direct-injection stirring and heating device for asphalt modification

Abstract

The present invention relates to a direct-injection type stirring and heating device for asphalt modification, which comprises a frame. A driving assembly is arranged on the frame. A cylinder body is arranged on the frame. A stirring assembly is rotatably arranged in the cylinder body. The stirring assembly comprises a stirring barrel and a plurality of through holes opened in the circumferential direction of the stirring barrel. A heat receiving assembly is slidably arranged in the through holes. A guiding assembly is arranged in the cylinder body. A heating pipe is further arranged on the inner wall of the cylinder body. Heat-conducting oil is added between the cylinder body and the stirring barrel. A modifier and aggregate are added into the stirring barrel. The driving assembly is used for driving the cylinder body and the stirring barrel to rotate in opposite directions. The stirring assembly is used for adding asphalt and mineral powder for overall mixing after stirring the modifier and aggregate. The heating pipe is used for heating the heat-conducting oil. The heat receiving assembly is used for expanding the heat receiving range of the modifier and aggregate under the action of the guiding assembly during rotation, so that the modifier and the aggregate are fully heated, and the heating efficiency of the modifier and the aggregate is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of direct-injection asphalt modification, and more specifically to a stirring and heating device for direct-injection asphalt modification. Background Art

[0002] Nowadays, when preparing modified asphalt, it is usually necessary to first add a direct-injection modifier and aggregate into a mixing tank and stir evenly, and then add matrix asphalt and mineral powder into the mixing tank for mixing to prepare a modified asphalt mixture.

[0003] A Chinese patent with the publication number CN209271446U discloses a reaction kettle for asphalt modification, including: a kettle body and a stirring device arranged inside the kettle body. The top of the kettle body is provided with a feed inlet and a feeding valve, and the bottom is provided with a discharge outlet. An electromagnetic heating coil is installed in cooperation with the outer periphery of the middle part of the kettle body. The material of the part of the kettle body installed in cooperation with the electromagnetic heating coil is made of a material that can be electromagnetically heated. The electromagnetic heating coil is installed in cooperation with a cooling device, and this reaction kettle is more reliable.

[0004] The above-mentioned prior art solutions have the following defects: The electromagnetic heating coil is located on the outer side wall of the kettle body, making the substances in the kettle body unevenly heated, and the substances near the middle of the kettle body cannot be effectively heated, thus making the quality of the obtained modified asphalt unable to be guaranteed. In addition, only by heating in this way, the efficiency is low. Summary of the Invention

[0005] The purpose of the present invention is to provide a stirring and heating device for direct-injection asphalt modification in view of the deficiencies of the prior art. By setting the stirring barrel to rotate, under the action of centrifugal force, the modifier and aggregate in the middle of the stirring barrel gradually approach the heat-conducting oil, improving the melting speed of the modifier, making the modifier better wrap around the surface of the aggregate, and then adding asphalt and mineral powder into the stirring barrel for mixing. In addition, by setting the cylinder body and the stirring barrel to rotate in opposite directions, the heat-conducting oil rubs against the stirring barrel, and the heat of the heat-conducting oil can be quickly transferred into the stirring barrel, improving the heating efficiency of the modifier and aggregate.

[0006] The technical solution of the present invention is as follows:

[0007] A stirring and heating device for direct-injection asphalt modification, comprising a frame, on which a driving component is arranged, a cylinder body is arranged on the frame, a stirring component is rotatably arranged in the cylinder body, the stirring component includes a stirring barrel and a plurality of through holes opened in the circumferential direction of the stirring barrel, a heat-receiving component is slidably arranged in the through holes, a guiding component is arranged in the cylinder body, a heating pipe is further arranged on the inner wall of the cylinder body, heat-conducting oil is added between the cylinder body and the stirring barrel, a modifier and aggregate are added in the stirring barrel, the driving component is used to drive the cylinder body and the stirring barrel to rotate in opposite directions, the stirring component is used to add asphalt and mineral powder for overall mixing after stirring the modifier and aggregate, the heating pipe is used to heat the heat-conducting oil, and the heat-receiving component is used to expand the heat-receiving range of the modifier and aggregate under the action of the guiding component during rotation.

[0008] As a preference, both left and right sides of the cylinder body are fixedly provided with rotating shafts, the rotating shafts are arranged in a hollow structure, and the rotating shafts are rotatably arranged on the frame.

[0009] As a preference, the stirring component further includes a threaded rod fixedly arranged in the stirring barrel, a plurality of sliding sleeves threadedly connected to the threaded rod, a plurality of stirring blades fixedly arranged on the sliding sleeves, and a stirring shaft fixedly arranged at one end of the threaded rod, and the stirring shaft is rotatably arranged in the rotating shaft.

[0010] As a preference, the driving component includes a motor fixedly arranged on the frame, a rotating rod rotatably arranged on the frame, a first synchronous pulley fixedly arranged on the rotating rod, a first gear fixedly arranged on the rotating rod, a second synchronous pulley fixedly arranged on the rotating shaft, a second gear fixedly arranged on the stirring shaft, and a synchronous belt connected between the first synchronous pulley and the second synchronous pulley, the output shaft of the motor is fixedly connected to the rotating rod, and the first gear and the second gear are meshed with each other.

[0011] As a preference, the heat-receiving component includes a heat-receiving cavity slidably arranged in the through hole, a guiding rod fixedly arranged on the top of the heat-receiving cavity, and a guiding ball fixedly arranged on the top of the guiding rod, and the guiding rod is arranged in a telescopic structure.

[0012] As a preference, the guiding component includes a fixed rod fixedly arranged on the frame, a fixing plate fixedly arranged on the fixed rod, a plurality of connecting rods fixedly arranged on the fixing plate, a fixed seat fixedly arranged in the middle of the fixing plate, a guide rail fixedly arranged on the connecting rod, and a guiding groove opened in the guide rail, the fixed rod passes through the rotating shaft, the fixing plate is attached to the inner wall of the cylinder body, the guiding groove is matched with the guiding ball, the threaded rod is rotatably arranged in the fixed seat, and one end of the stirring barrel is rotatably arranged on the fixed seat.

[0013] As a preference, a slider is fixedly arranged at the bottom of the sliding sleeve, a slide rail is fixedly arranged on the fixed seat, the slider is slidably arranged in the slide rail, and a plurality of the sliding sleeves are equidistantly distributed.

[0014] As a preference, a first feed valve is arranged at the top of the cylinder body, and a first discharge valve is arranged at the bottom of the cylinder body.

[0015] As a preference, a second feed valve is arranged at the top of the mixing barrel, and a second discharge valve is arranged at the bottom of the mixing barrel.

[0016] As another preference, a heat insulation layer is arranged outside the cylinder body.

[0017] The present invention is provided with a driving assembly, a cylinder body and a stirring assembly. By starting the motor to drive the cylinder body and the mixing barrel to rotate in opposite directions, the heat conduction oil rubs against the mixing barrel, so that the heat of the heat conduction oil can be quickly transferred into the mixing barrel, improving the heating efficiency of the modifier and the aggregate, and enabling the modifier to better wrap around the surface of the aggregate. In addition, when the stirring shaft drives the mixing barrel and the threaded rod to rotate forward and backward, the sliding sleeve and the stirring blades move left and right on the threaded rod to push the modifier and the aggregate. And during the rotation of the mixing barrel, under the action of centrifugal force, the modifier and the aggregate continuously collide with the inner wall of the mixing barrel, making the mixture between the two more uniform. Subsequently, when the modifier and the aggregate are mixed evenly, asphalt and mineral powder are added for overall mixing to obtain a modified asphalt mixture.

[0018] The present invention is provided with a heating assembly and a guiding assembly. By arranging a heating cavity, a guiding rod and a guiding ball, during the rotation of the heating cavity, the guiding ball drives the heating cavity to slide in the through hole under the action of the guiding groove. Due to the action of centrifugal force, the modifier and the aggregate enter the heating cavity when the mixing barrel rotates, thereby expanding the heating range in the mixing barrel and making the modifier and the aggregate heated more evenly.

[0019] In summary, the present invention has the advantages of good stirring effect, uniform heating, etc., and is suitable for the field of direct-injection asphalt modification technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following further describes the present invention with reference to the drawings:

[0021] Figure 1 It is a structural schematic diagram of the stirring and heating device for direct-injection asphalt modification;

[0022] Figure 2 It is a schematic diagram of the internal structure of the cylinder body;

[0023] Figure 3 It is a schematic diagram of the internal structure of the mixing barrel;

[0024] Figure 4 It is a cross-sectional view of the direct-injection asphalt modification stirring and heating device;

[0025] Figure 5 It is a cross-sectional view of the heating chamber;

[0026] Figure 6 It is a schematic diagram of the state where the heating chamber slides when the cylinder body and the stirring barrel rotate.

[0027] Reference numerals: 1 - frame; 11 - cylinder body; 12 - rotating shaft; 2 - drive assembly; 21 - motor; 22 - rotating rod; 23 - first synchronous pulley; 24 - first gear; 25 - second synchronous pulley; 26 - second gear; 27 - synchronous belt; 3 - stirring assembly; 31 - stirring barrel; 32 - through hole; 33 - threaded rod; 34 - sliding sleeve; 35 - stirring blade; 36 - stirring shaft; 37 - slider; 4 - heating assembly; 41 - heating chamber; 42 - guide rod; 43 - guide ball; 5 - guiding assembly; 51 - fixed rod; 52 - fixing plate; 53 - connecting rod; 54 - fixed seat; 55 - guide rail; 56 - guiding groove; 57 - slide rail; 6 - heating pipe; 7 - first feed valve; 71 - first discharge valve; 8 - second feed valve; 81 - second discharge valve. Embodiment

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings. Example

[0029] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention and should not be construed as a limitation of the present invention.

[0030] As Figures 1 to 6As shown in the figure, a stirring and heating device for direct-injection asphalt modification includes a frame 1, a driving assembly 2 is arranged on the frame 1, a cylinder 11 is arranged on the frame 1, a stirring assembly 3 is rotatably arranged in the cylinder 11, the stirring assembly 3 includes a stirring barrel 31 and a plurality of through holes 32 opened in the circumferential direction of the stirring barrel 31, a heat-receiving assembly 4 is slidably arranged in the through holes 32, a guiding assembly 5 is arranged in the cylinder 11, a heating pipe 6 is further arranged on the inner wall of the cylinder 11, heat-conducting oil is added between the cylinder 11 and the stirring barrel 31, a modifier and aggregate are added into the stirring barrel 31, the driving assembly 2 is used to drive the cylinder 11 and the stirring barrel 31 to rotate in opposite directions, the stirring assembly 3 is used to add asphalt and mineral powder into the modifier and aggregate after stirring them to complete overall mixing, the heating pipe 6 is used to heat the heat-conducting oil, the heat-receiving assembly 4 is used to expand the heat-receiving range of the modifier and aggregate under the action of the guiding assembly 5 during rotation, and the heating pipe 6 is connected to a power supply, which is a mature existing technology and will not be described in detail here.

[0031] As Figure 1 shown, rotating shafts 12 are fixedly arranged on both the left and right sides of the cylinder 11, the rotating shafts 12 are arranged in a hollow structure, and the rotating shafts 12 are rotatably arranged on the frame 1.

[0032] As Figure 3 shown, the stirring assembly 3 further includes a threaded rod 33 fixedly arranged in the stirring barrel 31, a plurality of sliding sleeves 34 threadedly connected to the threaded rod 33, a plurality of stirring blades 35 fixedly arranged on the sliding sleeves 34, and a stirring shaft 36 fixedly arranged at one end of the threaded rod 33, the stirring shaft 36 is rotatably arranged in the rotating shaft 12. During use, when the stirring shaft 36 drives the stirring barrel 1 and the threaded rod 33 to rotate forward and backward, the sliding sleeves 34 and the stirring blades 35 move left and right on the threaded rod 33 to push the modifier and the aggregate, making the mixture between the two more sufficient. And when the stirring barrel 31 drives the modifier and the aggregate to rotate, the stirring blades 35 are arranged to stir the modifier and the aggregate, further improving the mixing efficiency.

[0033] As Figure 1As shown in the figure, the driving assembly 2 includes a motor 21 fixedly arranged on the frame 1, a rotating rod 22 rotatably arranged on the frame 1, a first synchronous pulley 23 fixedly arranged on the rotating rod 22, a first gear 24 fixedly arranged on the rotating rod 22, a second synchronous pulley 25 fixedly arranged on the rotating shaft 12, a second gear 26 fixedly arranged on the stirring shaft 36, and a synchronous belt 27 connected between the first synchronous pulley 23 and the second synchronous pulley 25. The output shaft of the motor 21 is fixedly connected to the rotating rod 22. The first gear 24 and the second gear 26 are meshed with each other. During use, the motor 21 is started to drive the rotating rod 22, the first synchronous pulley 23 and the first gear 24 to rotate forward and backward. Under the action of the synchronous belt 27, the second synchronous pulley 25 rotates. Under the meshing of the first gear 24 and the second gear 26, the second gear 26 rotates, so that the rotating shaft 12 and the stirring shaft 36 rotate in opposite directions, thereby enabling the heat transfer oil to rub against the stirring barrel 31, quickly transferring the heat of the heat transfer oil into the stirring barrel 31, improving the heating efficiency of the modifier and the aggregate, and enabling the modifier to melt more quickly and then coat the surface of the aggregate.

[0034] As Figure 3 shown, the heat receiving assembly 4 includes a heat receiving cavity 41 slidably arranged in the through hole 32, a guide rod 42 fixedly arranged on the top of the heat receiving cavity 41, and a guide ball 43 fixedly arranged on the top of the guide rod 42. The guide rod 42 is arranged as a telescopic structure. During use, during the rotation of the heat receiving cavity 41, the guide ball 43 drives the heat receiving cavity 41 to slide in the through hole 32 under the action of the guide groove 56. Due to the action of centrifugal force, the modifier and the aggregate enter the heat receiving cavity 41 when the stirring barrel 31 rotates, thereby expanding the heat receiving range in the stirring barrel 31, making the modifier and the aggregate receive heat more evenly, and improving the melting efficiency of the modifier. In addition, the guide rod 42 is arranged as a telescopic structure. When the guide ball 43 rises and falls following the undulation of the guide groove 56, the guide rod 42 stretches or retracts to avoid structural jamming.

[0035] As Figure 2 shown, the guiding assembly 5 includes a fixed rod 51 fixedly arranged on the frame 1, a fixing plate 52 fixedly arranged on the fixed rod 51, a plurality of connecting rods 53 fixedly arranged on the fixing plate 52, a fixed seat 54 fixedly arranged in the middle of the fixing plate 52, a guide rail 55 fixedly arranged on the connecting rod 53, and a guide groove 56 opened in the guide rail 55. The fixed rod 51 passes through the rotating shaft 12. The fixing plate 52 is attached to the inner wall of the cylinder body 11. The guide groove 56 is matched with the guide ball 43. The threaded rod 33 is rotatably arranged in the fixed seat 54. One end of the stirring barrel 31 is rotatably arranged on the fixed seat 54. By arranging the guiding assembly 5, the effect of the movement of the heat receiving cavity 41 is achieved, thereby changing the heat receiving range of the stirring barrel 31.

[0036] As Figure 3 andFigure 4 As shown, a slider 37 is fixedly arranged at the bottom of the sliding sleeve 34, a slide rail 57 is fixedly arranged on the fixed seat 54, the slider 37 is slidably arranged in the slide rail 57, and a plurality of sliding sleeves 34 are equidistantly distributed. By arranging the slide rail 57, the sliding sleeve 34 can only move left and right on the threaded rod 33, avoiding rotation under the drive of the threaded rod 33.

[0037] As Figure 1 shown, a first feed valve 7 is arranged at the top of the cylinder body 11, and a first discharge valve 71 is arranged at the bottom of the cylinder body 11. The heat-conducting oil is added between the cylinder body 11 and the mixing barrel 31 through the first feed valve 7. After the mixing is completed, the heat-conducting oil is discharged through the first discharge valve 71.

[0038] As Figure 2 shown, a second feed valve 8 is arranged at the top of the mixing barrel 31, and a second discharge valve 81 is arranged at the bottom of the mixing barrel 31. The modifier and aggregate are added into the mixing barrel 31 through the second feed valve 8. After the modifier and aggregate are stirred evenly, the matrix asphalt and mineral powder are added through the second feed valve 8 for mixing. After the matrix asphalt is added, the matrix asphalt will wrap the modifier in a molten state on the surface of the aggregate. By using substances such as compatibilizers in the modifier particles that can promote the mutual dissolution of the modifier particles and asphalt, it better promotes the components such as aromatic components and saturated components in the matrix asphalt to obtain modified asphalt in a molten state. The modified asphalt mixture prepared in the mixing barrel 31 is discharged through the second discharge valve 81. Embodiment

[0039] As Figure 1 shown, the same or corresponding components as those in Embodiment 1 are marked with corresponding reference numerals in the drawings of Embodiment 1. For the sake of simplicity, only the differences from Embodiment 1 will be described below; the difference between this Embodiment 2 and Embodiment 1 is that a heat-insulating layer is provided outside the cylinder body 11, and the heat-insulating layer can retain the heat of the heat-conducting oil in the cylinder body 11, reduce heat loss, and further improve the heating effect of the modifier and aggregate.

[0040] First, the modifier and aggregate are added into the mixing barrel 31, then the heat-conducting oil is added between the cylinder body 11 and the mixing barrel 31. The heating pipe 6 is turned on to heat the heat-conducting oil. The motor 21 is started to drive the rotating rod 22 to rotate, and the first synchronous pulley 23 and the first gear 24 rotate forward and backward. Under the action of the synchronous belt 27, the second synchronous pulley 25 rotates. Under the meshing of the first gear 24 and the second gear 26, the second gear 26 rotates, causing the rotating shaft 12 and the mixing shaft 36 to rotate in opposite directions. When the mixing shaft 36 drives the mixing barrel 1 and the threaded rod 33 to rotate forward and backward, the sliding sleeve 34 and the mixing blades 35 move left and right on the threaded rod 33 to push the modifier and aggregate. At the same time, during the rotation of the heat-receiving cavity 41, the guide ball 43 drives the heat-receiving cavity 41 to slide in the through hole 32 under the action of the guide groove 56. Due to the centrifugal force, the modifier and aggregate enter the heat-receiving cavity 41 when the mixing barrel 31 rotates, thereby expanding the heat-receiving range in the mixing barrel 31, making the modifier and aggregate heat more evenly, and enabling the modifier to better adhere to the surface of the aggregate. When the modifier and aggregate are evenly mixed, the matrix asphalt and mineral powder are added through the second feed valve 8 for mixing. After the matrix asphalt is added, the matrix asphalt wraps the modifier in a molten state attached to the surface of the aggregate. By using substances such as compatibilizers in the modifier particles that can promote the mutual dissolution of the modifier particles and the asphalt, it better promotes the components such as aromatic components and saturated components in the matrix asphalt to form modified asphalt in a molten state. The heat-conducting oil is discharged through the first discharge valve 71, and the modified asphalt mixture prepared in the mixing barrel 31 is discharged through the second discharge valve 81.

[0041] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "front and back", "left and right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation of the invention.

[0042] Of course, in this technical solution, those skilled in the art should understand that the term "one" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of one component can be one, while in other embodiments, the number of this component can be multiple. The term "one" cannot be understood as a limitation on the number.

[0043] The above is only the preferred embodiment of the present invention in combination with the drawings, but the present invention is not limited to the above embodiments. It should be noted that for those skilled in the art, without departing from the structure of the present invention, various deformations and improvements can be made, which should also be regarded as the protection scope of the present invention and will not affect the implementation effect and practicality of the present invention.

Claims

1. A stirring and heating device for direct injection asphalt modification, comprising a frame (1), characterized in that: A driving component (2) is arranged on the frame (1). A cylinder body (11) is arranged on the frame (1). A stirring component (3) is rotatably arranged in the cylinder body (11). The stirring component (3) includes a stirring barrel (31) and a plurality of through holes (32) opened in the circumferential direction of the stirring barrel (31). A heat receiving component (4) is slidably arranged in the through holes (32). A guiding component (5) is arranged in the cylinder body (11). A heating pipe (6) is further arranged on the inner wall of the cylinder body (11). Heat conducting oil is added between the cylinder body (11) and the stirring barrel (31). A modifier and aggregate are added into the stirring barrel (31). The driving component (2) is used to drive the cylinder body (11) and the stirring barrel (31) to rotate in opposite directions. The stirring component (3) is used to add asphalt and mineral powder for overall mixing after the modifier and aggregate are stirred. The heating pipe (6) is used to heat the heat conducting oil. The heat receiving component (4) is used to expand the heat receiving range of the modifier and aggregate under the action of the guiding component (5) during rotation; Shafts (12) are fixedly arranged on both the left and right sides of the cylinder body (11). The shafts (12) are of a hollow structure and are rotatably arranged on the frame (1); The heat receiving component (4) includes a heat receiving cavity (41) slidably arranged in the through hole (32), a guiding rod (42) fixedly arranged at the top of the heat receiving cavity (41), and a guiding ball (43) fixedly arranged at the top of the guiding rod (42). The guiding rod (42) is of a telescopic structure; The guiding component (5) includes a fixed rod (51) fixedly arranged on the frame (1), a fixing plate (52) fixedly arranged on the fixed rod (51), a plurality of connecting rods (53) fixedly arranged on the fixing plate (52), a fixed seat (54) fixedly arranged in the middle of the fixing plate (52), a guide rail (55) fixedly arranged on the connecting rod (53), and a guiding groove (56) opened in the guide rail (55). The fixed rod (51) passes through the shaft (12). The fixing plate (52) is in contact with the inner wall of the cylinder body (11). The guiding groove (56) is matched with the guiding ball (43); During use, during the rotation of the heat receiving cavity (41), the guiding ball (43) drives the heat receiving cavity (41) to slide in the through hole (32) under the action of the guiding groove (56). When the guiding ball (43) rises and falls following the undulation of the guiding groove (56), the guiding rod (42) stretches or retracts to avoid structural jamming.

2. The stirring and heating device for direct-injection asphalt modification according to claim 1, characterized in that: The stirring component (3) further includes a threaded rod (33) fixedly arranged in the stirring barrel (31), a plurality of sliding sleeves (34) threadedly connected to the threaded rod (33), a plurality of stirring blades (35) fixedly arranged on the sliding sleeves (34), and a stirring shaft (36) fixedly arranged at one end of the threaded rod (33). The stirring shaft (36) is rotatably arranged in the shaft (12).

3. A direct-injection asphalt modification stirring and heating device according to claim 2, characterized in that: The driving assembly (2) includes a motor (21) fixedly arranged on the frame (1), a rotating rod (22) rotatably arranged on the frame (1), a first synchronous pulley (23) fixedly arranged on the rotating rod (22), a first gear (24) fixedly arranged on the rotating rod (22), a second synchronous pulley (25) fixedly arranged on the rotating shaft (12), a second gear (26) fixedly arranged on the stirring shaft (36), and a synchronous belt (27) connected between the first synchronous pulley (23) and the second synchronous pulley (25). The output shaft of the motor (21) is fixedly connected to the rotating rod (22), and the first gear (24) meshes with the second gear (26).

4. The stirring and heating device for direct injection asphalt modification according to claim 2, characterized in that: The threaded rod (33) is rotatably arranged in the fixed seat (54), and one end of the stirring barrel (31) is rotatably arranged on the fixed seat (54).

5. The stirring and heating device for direct-injection asphalt modification according to claim 4, characterized in that: A slider (37) is fixedly arranged at the bottom of the sliding sleeve (34), a slide rail (57) is fixedly arranged on the fixed seat (54), the slider (37) is slidably arranged in the slide rail (57), and several sliding sleeves (34) are equidistantly distributed.

6. The stirring and heating device for direct injection asphalt modification according to claim 1, characterized in that: A first feed valve (7) is arranged at the top of the cylinder body (11), and a first discharge valve (71) is arranged at the bottom of the cylinder body (11).

7. A stirring and heating device for direct-injection asphalt modification according to claim 1, characterized in that: A second feed valve (8) is arranged at the top of the stirring barrel (31), and a second discharge valve (81) is arranged at the bottom of the stirring barrel (31).

8. A stirring and heating device for direct-injection asphalt modification according to claim 1, characterized in that: A heat insulation layer is arranged outside the cylinder body (11).

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