A high-speed shearing device for preparing graphene modified asphalt

Abstract

The application discloses a high-speed shearing device for preparing graphene modified asphalt, and belongs to the field of modified asphalt preparation devices.The high-speed shearing device comprises a shearing cylinder, a feeding groove is arranged on the upper side of the shearing cylinder, a feeding device is fixedly connected to the feeding groove, the feeding device comprises a cylinder, a feeding motor is fixedly connected to one end of the cylinder, a core column is fixedly connected to the feeding motor main shaft extending into the cylinder, the core column is rotationally connected to the inner wall of the cylinder, and a plurality of grooves are uniformly arranged on the outer cylindrical surface of the core column; a mounting hole is arranged at one end of the core column, a plurality of extrusion devices are axially distributed on the inner wall of the mounting hole in a spiral manner, and the extrusion devices are arranged correspondingly to the grooves.The modified graphene particles are locally made to penetrate into the molten asphalt in a high-speed motion state, and the different extrusion devices penetrate into the shearing cylinder at different axial positions, so that the two materials which are not easy to mix can be uniformly mixed.

Description

Technical Field

[0001] This invention relates to the field of modified asphalt preparation equipment, and more particularly to a high-speed shearing device for preparing graphene-modified asphalt. Background Technology

[0002] Drainage asphalt pavements contain a lower proportion of fine aggregates and have a higher porosity, requiring higher asphalt viscosity. Currently, high-viscosity modified asphalt is generally used as the binder in drainage asphalt pavements. However, drainage asphalt pavements using this high-viscosity modified asphalt as the binder exhibit insufficient durability and a short service life. The main reasons are: firstly, the high porosity of drainage asphalt pavements makes the binder asphalt easily exposed to air, leading to aging and hardening, resulting in fatigue failure and reduced pavement service life; secondly, dust carried by vehicle tires and impurities in the air easily clog the pavement pores, causing loss of road function.

[0003] Adding graphene modifiers to asphalt results in graphene-modified asphalt with strong aging resistance, fatigue resistance, and hydrophobic properties. However, because graphene is miscible with asphalt macromolecules, it tends to agglomerate. Modifier particles are made by incorporating coupling agents and compatibilizers into graphene, and they still need to be miscible with asphalt. In conventional shearing and mixing devices, the modifier particles can only be added superficially to the asphalt surface. The small size and light weight of the modifier particles make it difficult for them to change position within the viscous asphalt, leading to uneven incorporation and unstable quality of the produced modified asphalt. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a high-speed shearing device for preparing graphene-modified asphalt, thereby solving the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-speed shearing device for preparing graphene-modified bitumen includes a shearing cylinder with a feeding trough on the upper side of the shearing cylinder. The feeding trough is fixedly connected to a feeding device, which includes a cylinder with a feeding motor fixedly connected to one end. The main shaft of the feeding motor extends into the cylinder and is fixedly connected to a core column. The core column is rotatably connected to the inner wall of the cylinder, and multiple grooves are uniformly arrayed on the outer surface of the core column.

[0007] A mounting hole is provided at one end of the core column. Multiple extrusion devices are distributed in a spiral axial manner on the inner wall of the mounting hole, and the extrusion devices are set in corresponding grooves.

[0008] The feed box is fixedly connected to the upper side of the cylinder, and the feed box is connected to the top of the cylinder.

[0009] Preferably, the extrusion device includes a bracket, which is fixedly connected to the inner wall of the mounting hole. The bracket is slidably connected to a push rod, and one end of the push rod is fixedly connected to a pressure strip. A strip-shaped through groove is provided at the bottom of the groove, and the pressure strip is slidably connected to the through groove. The other end of the push rod is fixedly connected to an arc-shaped plate, and a support spring is fixedly connected between the arc-shaped plate and the bracket.

[0010] A hanger rod is fixedly connected to the inner wall of the mounting hole. A sleeve is coaxially fixedly connected to one end of the cylinder corresponding to the open end of the mounting hole. The inner wall of the sleeve is provided with a spiral groove. The pitch of the spiral groove corresponds to the spiral distribution of the extrusion device. A limit rod is slidably connected to the hanger rod along the axial direction of the mounting hole. A limit ball is fixedly connected to one end of the limit rod. The limit ball is set to correspond to the arc plate. A support rod is fixedly connected to the other end of the limit rod. A ball is rotatably connected to the end of the support rod. The ball is rolled and connected in the spiral groove.

[0011] Preferably, a hot air duct is fixedly connected to one side of the feed box, and a filter screen is fixedly connected to the other side of the feed box.

[0012] Preferably, the shearing cylinder includes a base, two vertical plates are fixedly connected to the upper side of the base, an inner cylinder tube is fixedly connected to the upper end of the two vertical plates, a heating tube is fixedly connected to the inner wall of the inner cylinder tube, a bracket is fixedly connected to the middle of the upper side of the base, an outer cylinder is fixedly connected to the upper side of the bracket, the outer cylinder is coaxially arranged with the inner cylinder tube, end caps are rotatably connected to both ends of the outer cylinder, and a shearing rod is fixedly connected between the two end caps.

[0013] Preferably, an external gear ring is fixedly connected to the outer circle of one end cap, a drive motor is fixedly connected to the upper side of the base, the main shaft of the drive motor is fixedly connected to a first gear, and the first gear meshes with the external gear ring.

[0014] Preferably, the shearing rod is provided with a shearing groove, and a round rod is rotatably connected inside the shearing rod. The round rod is provided with multiple tapered holes, and a drive shaft is fixedly connected to one end of the round rod. The drive shaft extends out of the shearing rod and is fixedly connected to a linkage gear. Multiple arc-shaped protrusions are fixedly connected to the outer circle of the inner tube. A guide groove is provided on the end face of the shearing rod, and a toothed plate is slidably connected in the guide groove. The toothed plate meshes with the linkage gear, and a second spring is fixedly connected between the toothed plate and the shearing rod. A roller is rotatably connected to the end of the toothed plate near the inner tube. The roller presses against the outer circle of the inner tube and is provided with corresponding arc-shaped protrusions.

[0015] Preferably, the multiple tapered holes are spirally distributed along the axial direction of the round rod.

[0016] The advantages of this invention are as follows: The high-speed shearing device for preparing graphene-modified asphalt provided by this invention uses modified graphene particles stored in the feed box to rotate periodically with the core column. When one of the grooves of the core column rotates to the position facing the discharge port of the feed box, the modified graphene particles in the feed box fall into the groove. As the core column rotates, the groove carries some modified graphene particles to the position facing the feed trough and enters the shearing cylinder, where they mix with the asphalt in the shearing cylinder.

[0017] During this process, each groove is equipped with an extrusion device at a different position in the axial direction. The extrusion device pushes the modified graphene particles into the shearing cylinder through the position of the groove, which makes it easier for the local modified graphene particles to penetrate into the molten asphalt at high speed. Furthermore, the different extrusion devices perform deep feeding at different positions in the axial direction of the shearing cylinder, which facilitates the uniform mixing of two materials that are not easy to blend.

[0018] This invention achieves the axial movement of the limiting rod along the core column by rotating the core column and limiting the movement of the limiting rod by the ball bearing of the end support rod within the spiral groove. Since the spiral groove corresponds to the spiral distribution of multiple pressure bars on the core column, it is convenient that when the corresponding pressure bar aligns with the feed groove, the limiting ball is located on the corresponding arc plate, performing the corresponding pushing action. This is difficult to achieve with a simple electric push rod, thus facilitating the dispensing of modified graphene particles at different positions. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the basic structure of the present invention;

[0020] Figure 2 yes Figure 1 Schematic diagram showing a partial cross-section of the inner and outer cylinders;

[0021] Figure 3 yes Figure 2 Enlarged view of a section at point E in the middle;

[0022] Figure 4 yes Figure 2 Enlarged view of a section at point F in the middle;

[0023] Figure 5 This is a schematic diagram of the internal structure of the shearing cylinder of the present invention;

[0024] Figure 6 This is a schematic diagram of the connection structure between the core column and the half-sectioned cylinder of the present invention. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0026] like Figures 1-6As shown, the present invention provides a high-speed shearing device for preparing graphene-modified asphalt, including a shearing cylinder 1, a feeding groove 11 on the upper side of the shearing cylinder 1, a feeding device 2 fixedly connected to the feeding groove 11, the feeding device 2 including a cylinder 21, a feeding motor 22 fixedly connected to one end of the cylinder 21, the main shaft of the feeding motor 22 extending into the cylinder 21 and fixedly connected to a core column 23, the core column 23 being rotatably connected to the inner wall of the cylinder 21, and a plurality of grooves 24 uniformly arrayed on the outer circular surface of the core column 23;

[0027] One end of the core column 23 is provided with a mounting hole 25. Multiple extrusion devices 3 are spirally distributed on the inner wall of the mounting hole 25, and the extrusion devices 3 are provided in the groove 24.

[0028] A feed box 4 is fixedly connected to the upper side of the cylinder 21. The feed box 4 is connected to the top of the cylinder 21. A hot air pipe 41 is fixedly connected to one side of the feed box 4, and a filter screen 42 is fixedly connected to the other side of the feed box 4. Modifier particles, such as the modified graphene prepared in the prior art patent announcement number CN115093713B, are stored in the feed box 4. The modified graphene particles are temporarily stored in the feed box 4, and hot air is intermittently blown in through the hot air pipe 41 to dry the modified graphene particles.

[0029] In this invention, modified graphene particles stored in the feed box 4 rotate periodically in both directions with the core column 23. When one of the grooves 24 of the core column 23 rotates to a position facing the discharge port of the feed box 4, the modified graphene particles in the feed box 4 fall into the groove 24. As the core column 23 rotates, the groove 24 carries some of the modified graphene particles to a position facing the feed trough 11 and enters the shearing cylinder 1, where they mix with the asphalt in the shearing cylinder 1.

[0030] During this process, each groove 24 is equipped with an extrusion device 3 at a different position in the axial direction. The extrusion device 3 pushes the modified graphene particles into the shearing cylinder 1 through the position of the groove 24, so that the local modified graphene particles can penetrate into the molten asphalt at high speed. Furthermore, the different extrusion devices 3 perform deep feeding at different positions in the axial direction of the shearing cylinder 1, which facilitates the uniform mixing of two materials that are not easy to blend.

[0031] In another embodiment of the present invention, the extrusion device 3 includes a bracket 31, which is fixedly connected to the inner wall of the mounting hole 25. The bracket 31 is slidably connected to the push rod 32. One end of the push rod 32 is fixedly connected to the pressure strip 33. A strip-shaped through groove 34 is provided at the bottom of the groove 24. The pressure strip 33 is slidably connected to the through groove 34. The other end of the push rod 32 is fixedly connected to the arc plate 35. A support spring 36 is fixedly connected between the arc plate 35 and the bracket 31.

[0032] The inner wall of the mounting hole 25 is fixedly connected to the hanger 37. The end of the cylinder 21 corresponding to the open end of the mounting hole 25 is coaxially fixedly connected to the sleeve 38. The inner wall of the sleeve 38 is provided with a spiral groove 381. The pitch of the spiral groove 381 corresponds to the spiral distribution of the extrusion device 3. The hanger 37 is slidably connected to the limiting rod 39 along the axial direction of the mounting hole 25. One end of the limiting rod 39 is fixedly connected to the limiting ball 391, which corresponds to the arc plate 35. The other end of the limiting rod 39 is fixedly connected to the support rod 392. The end of the support rod 392 is rotatably connected to the ball 393, which is rolled in the spiral groove 381.

[0033] In this embodiment, the core column 23 inside the cylinder 21 is driven to rotate in both directions by the feeding motor 22 (rotating in reverse after one revolution and repeating periodically). When the pressure strip 33 of one of the extrusion devices 3 is aligned with the groove 24 and the feeding groove 11, that is, the arc plate 35 at the upper end of the push rod 32 corresponds to the limiting ball 391 that moves axially due to the rotation of the core column 23, extrusion is generated. The push rod 32 slides the pressure strip 33 from the through groove 34. The pressure strip 33 moves outward from the bottom of the groove 24, which can push the received modified graphene particles into the shearing cylinder 1, thereby facilitating the modified graphene particles to penetrate into the asphalt.

[0034] The core column 23 rotates under the control of the feeding motor 22. When the core column 23 rotates, the limiting rod 39 moves along the axial direction of the core column 23 due to the limiting effect of the ball 393 of the end support rod 392 in the spiral groove 381. Since the spiral groove 381 corresponds to the spiral distribution of multiple pressure strips 33 on the core column 23, it is convenient that when the corresponding pressure strip 33 corresponds to the feeding groove 11, the limiting ball 391 is located in the corresponding arc plate 35, and performs the corresponding pushing action. This is not easy to achieve with a simple electric push rod, thus facilitating the delivery of modified graphene particles at different positions.

[0035] In another embodiment of the present invention, the shearing cylinder 1 includes a base 11, two vertical plates 12 are fixedly connected to the upper side of the base 11, an inner cylinder tube 13 is fixedly connected to the upper ends of the two vertical plates 12, a heating tube 14 is fixedly connected to the inner wall of the inner cylinder tube 13, a bracket 15 is fixedly connected to the middle of the upper side of the base 11, an outer cylinder 16 is fixedly connected to the upper side of the bracket 15, the outer cylinder 16 is coaxially arranged with the inner cylinder tube 13, end caps 17 are rotatably connected to both ends of the outer cylinder 16, and a shearing rod 18 is fixedly connected between the two end caps 17.

[0036] One end cap 17 is fixedly connected to an external gear ring 171 on its outer circumference, and a drive motor 172 is fixedly connected to the upper side of the base 11. The main shaft of the drive motor 172 is fixedly connected to a first gear 173, which meshes with the external gear ring 171. During operation, the drive motor 172 drives the end cap 17 to rotate through the first gear 173. The shearing rod 18 between the two end caps performs high-speed rotational extrusion and shearing on the asphalt in the cavity between the inner cylinder 13 and the outer cylinder 16. The asphalt material is circulated through the feed trough 11 by the shearing rod 18. The modified graphene particles are gradually fed into the feed trough 11. The modified graphene particles can be well integrated into the unidirectionally moving asphalt material, which facilitates the uniform dispersion of the modified graphene particles in the asphalt, thus facilitating the mixing of the two materials.

[0037] In another embodiment of the present invention, the shearing rod 18 is provided with a shearing through groove 181, a round rod 5 is rotatably connected inside the shearing rod 18, the round rod 5 is provided with a plurality of tapered holes 51, one end of the round rod 5 is fixedly connected to a drive shaft 52, the drive shaft 52 extends out of the shearing rod 18 and is fixedly connected to a linkage gear 53, a plurality of arc-shaped protrusions 54 are fixedly connected to the outer circle of the inner tube 13, a guide groove 55 is provided on the end face of the shearing rod 18, a toothed plate 56 is slidably connected inside the guide groove 55, the toothed plate 56 meshes with the linkage gear 53, a second spring 57 is fixedly connected between the toothed plate 56 and the shearing rod 18, a roller 58 is rotatably connected to one end of the toothed plate 56 near the inner tube 13, the roller 58 presses against the outer circle of the inner tube 13 and is provided with corresponding arc-shaped protrusions 54.

[0038] Furthermore, multiple conical holes 51 are spirally distributed along the axial direction of the round rod 5, and the rotating face of the shear rod 18 is the large end of the conical holes 51. The local mixture is squeezed and mixed because the conical holes 51 pass through it.

[0039] In this embodiment, the shearing rod 18 rotates at high speed in the cavity between the inner cylinder 13 and the outer cylinder 16 to mix the asphalt and modified graphene particles. By setting a spirally distributed conical hole 51 on the round rod 5, some of the asphalt and modified graphene particles melted material passes through the conical hole 51 and is squeezed during the high-speed rotation of the shearing rod 18, thereby making the two mix more thoroughly.

[0040] As the mixture passes through the conical hole 51, the shearing rod 18 rotates with the end cap 17, and the roller 58 rolls on the outside of the inner cylinder 13 and encounters the arc-shaped protrusion 54. In conjunction with the second spring 57, the toothed plate 56 reciprocates, driving the round rod 5 of the linkage gear 53 to oscillate periodically, thereby changing the angle of the conical hole 51. The guide provided by the conical hole 51 changes accordingly, and the position of the mixture that has passed through is different from that of the subsequent mixture. Thus, through the repeated changes in the position of the material, it is easier for the two types of asphalt and modified graphene particles to form a mixture.

[0041] 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 alterations 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 high-speed shearing device for preparing graphene-modified asphalt, comprising a shearing cylinder (1), a feed chute (11) provided on the upper side of the shearing cylinder (1), and a feed device (2) fixedly connected to the feed chute (11), characterized in that: The feeding device (2) includes a cylinder (21), one end of which is fixedly connected to a feeding motor (22). The main shaft of the feeding motor (22) extends into the cylinder (21) and is fixedly connected to a core column (23). The core column (23) is rotatably connected to the inner wall of the cylinder (21). Multiple grooves (24) are evenly arranged on the outer circular surface of the core column (23). One end of the core column (23) is provided with a mounting hole (25), and multiple extrusion devices (3) are spirally distributed on the inner wall of the mounting hole (25). The extrusion devices (3) are set in the groove (24). The upper side of the cylinder (21) is fixedly connected to the feed box (4), and the feed box (4) is connected to the top of the cylinder (21); The extrusion device (3) includes a bracket (31), which is fixedly connected to the inner wall of the mounting hole (25). The bracket (31) is slidably connected to a push rod (32). One end of the push rod (32) is fixedly connected to a pressure strip (33). A strip-shaped through groove (34) is provided at the bottom of the groove (24). The pressure strip (33) is slidably connected to the through groove (34). The other end of the push rod (32) is fixedly connected to an arc plate (35). A support spring (36) is fixedly connected between the arc plate (35) and the bracket (31). The inner wall of the mounting hole (25) is fixedly connected to the hanger (37), and the cylinder (21) is coaxially fixedly connected to the sleeve (38) at the open end of the mounting hole (25). The inner wall of the sleeve (38) is provided with a spiral groove (381). The pitch of the spiral groove (381) corresponds to the spiral distribution of the extrusion device (3). The hanger (37) is slidably connected to the limiting rod (39) along the axial direction of the mounting hole (25). One end of the limiting rod (39) is fixedly connected to the limiting ball (391). The limiting ball (391) corresponds to the arc plate (35). The other end of the limiting rod (39) is fixedly connected to the support rod (392). The end of the support rod (392) is rotatably connected to the ball (393). The ball (393) is rotatably connected in the spiral groove (381). A hot air pipe (41) is fixedly connected to one side of the feed box (4), and a filter screen (42) is fixedly connected to the other side of the feed box (4); The shearing cylinder (1) includes a base (11), two vertical plates (12) are fixedly connected to the upper side of the base (11), the upper ends of the two vertical plates (12) are fixedly connected to the inner cylinder tube (13), the inner wall of the inner cylinder tube (13) is fixedly connected to the heating tube (14), the upper middle part of the base (11) is fixedly connected to the bracket (15), the upper side of the bracket (15) is fixedly connected to the outer cylinder (16), the outer cylinder (16) is coaxially arranged with the inner cylinder tube (13), the two ends of the outer cylinder (16) are respectively rotatably connected to the end caps (17), and the shearing rod (18) is fixedly connected between the two end caps (17). One of the end caps (17) is fixedly connected to an external gear ring (171) on its outer circle, and a drive motor (172) is fixedly connected to the upper side of the base (11). The main shaft of the drive motor (172) is fixedly connected to a first gear (173), and the first gear (173) meshes with the external gear ring (171). The shearing rod (18) is provided with a shearing through groove (181). A round rod (5) is rotatably connected inside the shearing rod (18). The round rod (5) is provided with multiple tapered holes (51). One end of the round rod (5) is fixedly connected to a drive shaft (52). The drive shaft (52) extends out of the shearing rod (18) and is fixedly connected to a linkage gear (53). Multiple arc-shaped protrusions (54) are fixedly connected to the outer circle array of the inner tube (13). A guide groove (55) is provided on the end face of the shearing rod (18). A toothed plate (56) is slidably connected inside the guide groove (55). The toothed plate (56) meshes with the linkage gear (53). A second spring (57) is fixedly connected between the toothed plate (56) and the shearing rod (18). A roller (58) is rotatably connected to one end of the toothed plate (56) near the inner tube (13). The roller (58) presses against the outer circle surface of the inner tube (13) and is provided with corresponding arc-shaped protrusions (54). Multiple conical holes (51) are spirally distributed along the axial direction of the round rod (5).

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