Uniform mixing device for fiber-reinforced asphalt mixture and use method of uniform mixing device

Abstract

The invention belongs to the technical field of asphalt processing, and particularly discloses a fiber reinforced asphalt mixture uniform mixing device and a use method. The device comprises a mixing barrel, a first stirring assembly, a first motor, a second stirring assembly and a second motor, wherein an interlayer is arranged on the surface of the mixing barrel; the first stirring assembly is arranged on the outer side of the mixing barrel and drives the mixing barrel to rotate; the first motor drives the first stirring assembly to rotate; the heating assembly is arranged in the interlayer; the mixing barrel and the second stirring assembly are driven to rotate in opposite directions, so that a mixture in the barrel is promoted to reciprocate, fibers are prevented from being gathered to form blocks, and it is ensured that the mechanical property and durability of the asphalt mixture are not affected; besides, the asphalt is continuously and stably heated by the heating assembly, so that the activity and the fluidity of the fiber asphalt mixture in the mixing process are ensured, and the problem of mixture solidification caused by temperature drop is prevented.

Description

Technical Field

[0001] The present invention belongs to the technical field of asphalt processing, and more specifically, relates to a fiber-reinforced asphalt mixture uniform mixing device and a use method thereof. Background Art

[0002] With the rapid development of my country's transportation industry, the highway network continues to expand, and the demand for road quality is also increasing. As one of the most widely used materials in modern highway construction, asphalt pavement is highly favored for its excellent smoothness, comfort, and noise reduction properties. However, with the increase in traffic volume and the rising proportion of heavy-loaded vehicles, the pressure on asphalt pavements has increased significantly, resulting in severe challenges to its engineering durability. In particular, during its service life, asphalt pavements frequently develop early-stage defects such as cracks, potholes, and transverse cracks, seriously affecting the road's service life and service quality.

[0003] To improve the crack resistance and durability of asphalt mixtures, incorporating fibers into asphalt mixtures has become a widely adopted and important method. Fibers play a variety of roles in asphalt mixtures, including reinforcement, dispersion, adsorption, stabilization, and viscosity enhancement, making them a crucial additive for enhancing the performance of asphalt mixtures. Currently, a wide variety of fiber additives are commonly used in asphalt mixtures, including lignin fiber, polyester fiber, basalt fiber, steel fiber, polyacrylonitrile fiber, and aramid fiber.

[0004] However, although the use of fibers has brought many positive effects, in actual application, the dispersion of fibers in asphalt mixtures has become a key problem that restricts further improvement of its performance. At present, when mixing in traditional mixing devices, fiber-reinforced asphalt mixture products are prone to fiber agglomeration. This agglomeration phenomenon prevents the fibers from being evenly distributed in the asphalt mixture, thereby greatly weakening the reinforcement effect that the fibers should have. What is more serious is that these fiber agglomerates form areas with weak mechanical properties inside the mixture, which not only affects the overall mechanical properties of the fiber asphalt mixture, but also makes the strength data of the fiber asphalt mixture show a large degree of discreteness, which is not conducive to the optimization design of the mix ratio of the fiber asphalt mixture and affects the application of the fiber asphalt mixture in physical projects. Summary of the Invention

[0005] In response to the above-mentioned defects or improvement needs of the prior art, the present invention provides a fiber-reinforced asphalt mixture uniform mixing device and a method for use. By driving the mixing barrel and the second stirring component to rotate in opposite directions respectively, the mixture in the barrel is caused to produce reciprocating motion, which greatly enhances the stirring effect, so that the fibers can be evenly dispersed in the mixture, effectively avoiding the problem of fiber aggregation to form clumps, and ensuring that the mechanical properties and durability of the asphalt mixture are not affected; in addition, the asphalt is continuously and stably heated by the heating component, thereby ensuring the activity and fluidity of the fiber asphalt mixture during the mixing process, preventing the mixture from solidifying due to temperature drop, and helping to maintain the ideal construction performance of the mixture.

[0006] In order to achieve the above-mentioned object, the present invention provides a fiber-reinforced asphalt mixture uniform mixing device, comprising:

[0007] Mixing barrel with interlayer on the surface;

[0008] a first stirring assembly disposed outside the mixing barrel and driving the mixing barrel to rotate, and a first motor driving the first stirring assembly to rotate;

[0009] a second stirring assembly disposed within the mixing barrel and rotatably connected to the mixing barrel, and a second motor driving the second stirring assembly to rotate;

[0010] a heating element disposed in the interlayer;

[0011] The mixing barrel and the second stirring component are driven to rotate in opposite directions respectively to cause the mixture in the barrel to produce reciprocating motion, and the asphalt is continuously and stably heated by the heating component to ensure the activity and fluidity of the fiber asphalt mixture during the mixing process.

[0012] Furthermore, the mixing device also includes a frame for supporting other components, and the frame as a whole is a square frame structure and is arranged on the working ground;

[0013] A sub-frame for supporting the first motor and the second motor is provided on one side of the frame, and the sub-frame is a multi-layer square frame as a whole;

[0014] A protective cover is provided on the outside of the auxiliary frame, and a heat dissipation fan is provided on the side of the protective cover away from the mixing barrel.

[0015] Furthermore, the first motor is arranged in the sub-frame, and a first transmission gear is provided at the end of the output shaft thereof;

[0016] The first stirring assembly includes: a first transmission shaft, a second transmission gear, a first bracket, a second transmission shaft, a third transmission gear, a fourth transmission gear and a second bracket; several first brackets are evenly arranged on the upper end of the frame close to the first motor; the first transmission shaft is rotatably connected to at least two of the first brackets through rolling bearings, and the second transmission gears are provided at both ends thereof, and the second transmission gear at one end forms a gear transmission structure with the first transmission gear; several second brackets are evenly arranged on the upper end of the frame; the second transmission shaft is rotatably connected to at least two of the second brackets through rolling bearings, and the third transmission gear is provided at one end thereof, and the third transmission gear forms a gear transmission structure with the second transmission gear at one end of the first transmission shaft; several fourth transmission gears are sleeved on the outside of the second transmission shaft.

[0017] Furthermore, the mixing barrel is arranged horizontally, and it also includes: a material port, an annular rack and a first stirring blade; the material port is arranged on the surface of the mixing barrel and is provided with an openable sealing cover, which is a common channel for feeding and discharging; the annular rack is sleeved on the outer surface of the mixing barrel and is rotatably connected to the fourth transmission gear arranged on both sides of the mixing barrel; the two first stirring blades are mirror-symmetrically arranged vertically on the inner wall of the mixing barrel and rotate with the mixing barrel.

[0018] Furthermore, the second motor is provided at the upper end of the auxiliary frame, and the axis of the output shaft thereof is collinear with the axis of the mixing barrel;

[0019] The second stirring assembly includes: a third transmission shaft, a stirring rod, and a second stirring blade; the axis of the third transmission shaft is colinear with the axis of the mixing barrel, the third transmission shaft is rotatably connected to the mixing barrel via a rolling bearing, and one end passes through the mixing barrel and is connected to the output shaft of the second motor; the second stirring blade is a spiral blade as a whole, and is fixedly connected to the third transmission shaft via a plurality of stirring rods provided perpendicularly to the surface of the third transmission shaft;

[0020] The gap between the outer side of the second stirring blade and the inner wall of the mixing barrel is 2mm to 5mm.

[0021] Furthermore, the heating assembly includes: heating wires evenly laid on the inner side of the interlayer, heat-conducting oil arranged in the interlayer, and a plurality of temperature sensors arranged in the interlayer;

[0022] The heat transfer oil is a mineral heat transfer oil or a synthetic heat transfer oil.

[0023] Furthermore, the mixing device also includes a power supply box arranged on one side of the interior of the protective cover, and the power supply box is electrically connected to the first motor and the second motor through cables, and is electrically connected to the heating wire through a brush slip ring.

[0024] Furthermore, the mixing device also includes a controller, which is arranged on one side of the protective cover, is electrically connected to the power supply box, and is respectively communicatively connected to the first motor, the second motor, the heating assembly and the power supply box.

[0025] Another aspect of the present invention provides a method for using a fiber-reinforced asphalt mixture uniform mixing device, which is implemented using the mixing device described above and includes the following steps:

[0026] S1: After checking that the equipment is normal and without damage, close the material port and preheat the mixing drum according to the type of asphalt mixture;

[0027] S2: After preheating is completed, the feed port is turned upward and opened by the first motor and the first stirring assembly, and the hot coarse and fine materials and the fiber mixture weighed according to the mixing ratio are added into the mixing barrel from the feed port. Thereafter, the feed port is closed, and the mixing barrel and the second stirring assembly are rotated in opposite directions until the mixing is uniform;

[0028] S3: Stop mixing, open the feed port upward, and add the weighed hot asphalt into the mixing barrel. Then, close the feed port, and rotate the mixing barrel and the second stirring assembly in opposite directions until the mixing is uniform.

[0029] S4: After the mixing barrel is rotated and stopped until the material opening faces downward, the material opening is opened to pour out the mixed material. At the same time, the second stirring component is kept rotating to push the mixed material away from the material opening toward the material opening, and after the mixed material is discharged, the residual mixed material in the material opening area is cleared;

[0030] S5: Repeat steps S2 to S4 to complete the mixing operation of the same type of fiber-reinforced asphalt mixture.

[0031] Furthermore, in step S1, the heating temperature of the ordinary asphalt mixture is 140°C to 160°C, and the heating temperature of the modified asphalt mixture is 150°C to 170°C;

[0032] In step S2, the mixing time is 60s to 90s, the rotation speed of the mixing barrel is 20r / min to 40r / min, and the rotation speed of the second stirring component is 60r / min to 80r / min;

[0033] In step S3, the mixing time is 60s to 90s, the rotation speed of the mixing barrel is 20r / min to 40r / min, and the rotation speed of the second stirring component is 60r / min to 80r / min.

[0034] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0035] 1. The mixing device of the present invention drives the mixing barrel and the second stirring component to rotate in opposite directions respectively, thereby causing the mixture in the barrel to produce reciprocating motion, greatly enhancing the stirring effect, allowing the fibers to be evenly dispersed in the mixture, effectively avoiding the problem of fiber aggregation to form clumps, and ensuring that the mechanical properties and durability of the asphalt mixture are not affected; in addition, the asphalt is continuously and stably heated by the heating component, thereby ensuring the activity and fluidity of the fiber asphalt mixture during the mixing process, preventing the mixture from solidifying due to temperature drop, and helping to maintain the ideal construction performance of the mixture.

[0036] 2. The mixing device of the present invention arranges the first stirring assembly, the first motor and the annular rack on the outside of the mixing barrel, so that the mixing barrel is in motion during the stirring process. Combined with the first stirring blade provided inside the mixing barrel, it can effectively drive the mixture that may settle or adhere to the inner wall of the barrel to rotate and roll, thereby overcoming the common material sedimentation problem in traditional stirring equipment and ensuring the uniform distribution of the mixture components; at the same time, it can promote the relative displacement between the internal mixtures, enhance the friction and collision between the materials, and further improve the mixing effect.

[0037] 3. The mixing device of the present invention, by arranging the stirring rod and the second stirring blade in the mixing barrel, can effectively scrape off the asphalt mixture adhered to the inner wall of the mixing barrel, prevent material accumulation and hardening, ensure the cleanliness and working efficiency of the interior of the mixing barrel, and at the same time improve the heating effect of the heating component; and, through the synergistic effect of the second stirring blade and the stirring rod, a multi-dimensional material flow path is formed during the stirring process, so that the fiber material is evenly distributed in the asphalt, further promoting the full mixing between the components, and greatly improving the quality stability of the final product.

[0038] 4. The mixing device of the present invention, through the brush slip ring, ensures that the heating wire in the heat transfer oil can obtain stable and continuous power supply during the rotation of the mixing drum, thereby achieving precise temperature control, so that the heat transfer oil can transfer heat to the asphalt mixture evenly and efficiently. At the same time, the heat transfer oil has good thermal stability and high heat capacity, which can effectively maintain temperature consistency and effectively avoid local overheating or temperature unevenness. It helps to improve the working performance of the mixture, promote the uniform dispersion of fibers, and enhance the overall strength and durability of the material.

[0039] 5. The mixing device of the present invention uses a shared inlet and outlet and adopts the second stirring blade that fits the inner wall of the mixing barrel to push the mixed material in the mixing barrel toward the outlet, thereby effectively increasing the discharge rate and reducing the material residue in the mixing barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a schematic structural diagram of a mixing device according to an embodiment of the present invention;

[0041] Figure 2 This is a schematic structural diagram of the assembly of the first stirring assembly and the frame according to an embodiment of the present invention;

[0042] Figure 3 This is a schematic structural diagram of the vertical support leg assembly according to an embodiment of the present invention;

[0043] Figure 4 1. A schematic flow chart of the steps of a method for using a mixing device according to an embodiment of the present invention.

[0044] In all the drawings, the same reference numerals represent the same technical features, specifically: 1-mixing barrel, 101-interlayer, 102-material port, 103-ring rack, 104-first stirring blade, 2-first stirring assembly, 201-first transmission shaft, 202-second transmission gear, 203-first bracket, 204-second transmission shaft, 205-third transmission gear, 206-fourth transmission gear, 207-second bracket, 3-first motor, 301-first transmission gear, 4-second stirring assembly, 401-third transmission shaft, 402-stirring rod, 403-second stirring blade, 5-second motor, 6-heating assembly, 601-heating wire, 602-temperature sensor, 7-frame, 701-sub-frame, 702-protective cover, 703-cooling fan, 704-vertical support leg, 8-power supply box, 801-brush slip ring, 9-controller. DETAILED DESCRIPTION

[0045] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to illustrate the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0046] Example 1

[0047] like Figures 1 to 3As shown, embodiment 1 of the present invention provides a fiber-reinforced asphalt mixture uniform mixing device, comprising: a mixing barrel 1 having an interlayer 101 on its surface, a first stirring assembly 2 disposed outside the mixing barrel 1 and driving the mixing barrel 1 to rotate, a first motor 3 driving the first stirring assembly 2 to rotate, a second stirring assembly 4 disposed inside the mixing barrel 1 and rotatably connected to the mixing barrel 1, a second motor 5 driving the second stirring assembly 4 to rotate, and a heating assembly 6 disposed within the interlayer 101. During use, by driving the mixing barrel 1 and the second stirring assembly 4 to rotate in opposite directions, the mixture in the barrel is caused to generate reciprocating motion, greatly enhancing the stirring effect, allowing the fibers to be uniformly dispersed in the mixture, effectively avoiding the problem of fiber aggregation forming lumps, and ensuring that the mechanical properties and durability of the asphalt mixture are not affected. In addition, the heating assembly 6 continuously and stably heats the asphalt, thereby ensuring the activity and fluidity of the fiber asphalt mixture during the mixing process, preventing the mixture from solidifying due to temperature drop, and helping to maintain the ideal construction performance of the mixture.

[0048] like Figures 1 to 3 The mixing device also includes a frame 7 for supporting other components. This frame 7 is an overall square frame structure and is located on the work surface to ensure the stability and safety of the entire device during the mixing process. A sub-frame 701 is provided on one side of the frame 7 for supporting the first motor 3 and the second motor 5. This sub-frame 701 is an overall multi-layer square frame to improve loading capacity and adaptability to complex working conditions, and to reduce shaking and displacement. A protective cover 702 is provided on the outside of the sub-frame 701. A cooling fan 703 is provided on the side of the protective cover 702 away from the mixing barrel 1 to improve heat dissipation and ensure the stability of the motors and other components.

[0049] In an optional embodiment, the bottom ends of the bracket 7 and the sub-frame 701 are provided with a plurality of vertical support legs 704, which are fixedly connected by support rods to appropriately increase the height of the bracket 7 while ensuring the structural stability of the device, thereby facilitating loading and unloading operations.

[0050] like Figures 1 to 3 As shown, the first motor 3 is disposed in the sub-frame 701 , and a first transmission gear 301 is provided at the end of its output shaft for stably transmitting power to the first stirring assembly 2 ;

[0051] like Figures 1 to 3As shown, the first stirring assembly 2 includes: a first transmission shaft 201, a second transmission gear 202, a first bracket 203, a second transmission shaft 204, a third transmission gear 205, a fourth transmission gear 206 and a second bracket 207; several first brackets 203 are evenly arranged at the upper end of the frame 7 close to the first motor 3; the first transmission shaft 201 is rotatably connected to at least two of the first brackets 203 through rolling bearings, and the second transmission gears 202 are provided at both ends thereof, and the second transmission gear 202 at one end thereof and the first transmission gear 301 form a gear transmission structure; several second brackets 207 are evenly arranged at the upper end of the frame 7; the second transmission shaft 204 is rotatably connected to at least two of the second brackets 207 through rolling bearings, and the third transmission gear 205 is provided at one end thereof, and the third transmission gear 205 and the second transmission gear 202 at one end of the first transmission shaft 201 form a gear transmission structure; several fourth transmission gears 206 are sleeved on the outside of the second transmission shaft 204.

[0052] like Figure 1 and Figure 3 The mixing barrel 1 is horizontally arranged, and further includes: a material port 102, an annular rack 103 and a first stirring blade 104; the material port 102 is arranged on the surface of the mixing barrel 1 and is provided with an openable sealing cover, which is a common channel for feeding and discharging; the annular rack 103 is sleeved on the outer surface of the mixing barrel 1 and is rotatably connected to the fourth transmission gear 206 arranged on both sides of the mixing barrel 1; the two first stirring blades 104 are mirror-symmetrically arranged vertically on the inner wall of the mixing barrel 1 and rotate with the mixing barrel 1.

[0053] It can be understood that, through the above design, the first stirring assembly 2, the first motor 3 and the annular rack 103 are arranged on the outside of the mixing barrel 1, so that the mixing barrel 1 is in motion during the stirring process. Combined with the first stirring blade 104 provided inside it, it can effectively drive the mixture that may be precipitated or attached to the inner wall of the barrel to rotate and roll, thereby overcoming the common material sedimentation problem in traditional stirring equipment and ensuring the uniform distribution of the mixture components; at the same time, it can promote the relative displacement between the internal mixtures, enhance the friction and collision between the materials, and further improve the mixing effect.

[0054] like Figures 1 to 3 As shown, the second motor 5 is provided at the upper end of the sub-frame 701, and the axis of its output shaft is colinear with the axis of the mixing barrel 1, so as to improve the rotation output efficiency and ensure the output stability.

[0055] like Figures 1 to 3As shown, the second stirring component 4 includes: a third transmission shaft 401, a stirring rod 402 and a second stirring blade 403; the axis of the third transmission shaft 401 is colinear with the axis of the mixing barrel 1, and it is rotatably connected to the mixing barrel 1 through a rolling bearing and one end passes through the mixing barrel 1 and is connected to the output shaft of the second motor 5; the second stirring blade 403 is a spiral blade as a whole, and is fixedly connected to the third transmission shaft 401 through a plurality of stirring rods 402 vertically arranged on the surface of the third transmission shaft 401.

[0056] In an optional embodiment, the gap between the outer side of the second stirring blade 403 and the inner wall of the mixing barrel 1 is 2 mm to 5 mm.

[0057] It can be understood that, through the above design, the stirring rod 402 and the second stirring blade 403 are arranged in the mixing barrel 1, which can effectively scrape off the asphalt mixture adhering to the inner wall of the mixing barrel 1, prevent material accumulation and hardening, ensure the cleanliness and working efficiency of the inside of the mixing barrel 1, and at the same time, improve the heating effect of the heating component 6; and, through the synergistic effect of the second stirring blade 403 and the stirring rod 402, a multi-dimensional material flow path is formed during the stirring process, so that the fiber material is evenly distributed in the asphalt, further promoting the full mixing between the components, and greatly improving the quality stability of the final product.

[0058] like Figures 1 to 3 As shown, the heating component 6 includes: a heating wire 601 evenly laid on the inner side of the interlayer 101 , heat transfer oil arranged in the interlayer 101 , and a plurality of temperature sensors 602 arranged in the interlayer 101 .

[0059] In an optional embodiment, the heat transfer oil is a mineral heat transfer oil or a synthetic heat transfer oil to meet the heating requirements of the asphalt mixture.

[0060] like Figure 1 and Figure 3 As shown, the mixing device also includes a power supply box 8 provided on one side of the interior of the protective cover 702. The power supply box 8 is electrically connected to the first motor 3 and the second motor 5 through cables, and is electrically connected to the heating wire 601 through a brush slip ring 801 to ensure stable operation of the device.

[0061] It can be understood that, through the above design, the brush slip ring 801 ensures that the heating wire can obtain stable and continuous power supply in the heat transfer oil during the rotation of the mixing barrel 1, thereby achieving precise temperature control, so that the heat transfer oil can transfer heat to the asphalt mixture evenly and efficiently. At the same time, the heat transfer oil has good thermal stability and high heat capacity, which can effectively maintain temperature consistency, effectively avoiding local overheating or uneven temperature problems, helping to improve the working performance of the mixture, promote the uniform dispersion of fibers, and enhance the overall strength and durability of the material.

[0062] like Figure 1 and Figure 3 The mixing device further includes a controller 9, which is disposed on one side of the protective cover 702. The controller 9 is electrically connected to the power supply box 8 and is respectively communicated with the first motor 3, the second motor 5, the heating component 6 and the power supply box 8 to precisely control the mixing process and further improve the quality of the mixture and production safety.

[0063] In an optional embodiment, the controller 9 includes: at least one display screen, and several control buttons; the control buttons mainly have functions such as starting and stopping the device, setting the rotation speed, setting the heating temperature, and emergency stop.

[0064] Example 2

[0065] like Figure 4 As shown, based on Example 1, Example 2 of the present invention provides a method for using a fiber-reinforced asphalt mixture uniform mixing device, comprising the following steps:

[0066] S1: After checking that the equipment is normal and without damage, close the material port 102 and preheat the mixing drum 1 according to the type of asphalt mixture;

[0067] S2: After preheating is completed, the material port 102 is opened upward by the first motor 3 and the first stirring assembly 2, and the hot coarse and fine materials and the fiber mixture weighed according to the mixing ratio are fed into the mixing barrel 1 from the material port 102. After that, the material port 102 is closed, and the mixing barrel 1 and the second stirring assembly 4 are rotated in opposite directions until the mixing is uniform;

[0068] S3: Stop mixing, open the material port 102 upward, and add the weighed hot asphalt into the mixing barrel 1. Then, close the material port 102, and rotate the mixing barrel 1 and the second stirring assembly 4 in opposite directions until the mixing is uniform.

[0069] S4: After the mixing barrel 1 is rotated and stopped until the material opening 102 faces downward, the material opening 102 is opened to pour out the mixed material. At the same time, the second stirring component 4 is kept rotating to push the mixed material away from the material opening 102 toward the material opening 102. After the mixed material is discharged, the residual mixed material in the area of the material opening 102 is cleared;

[0070] S5: Repeat steps S2 to S4 to complete the mixing operation of the same type of fiber-reinforced asphalt mixture.

[0071] In an optional embodiment, in step S1, the heating temperature of the ordinary asphalt mixture is 140°C to 160°C, and the heating temperature of the modified asphalt mixture is 150°C to 170°C.

[0072] In an optional embodiment, in step S2, the mixing time is 60s to 90s, the rotation speed of the mixing barrel 1 is 20r / min to 40r / min, and the rotation speed of the second stirring component 4 is 60r / min to 80r / min, so as to improve the stirring efficiency while meeting the mixing uniformity condition.

[0073] In an optional embodiment, in step S3, the mixing time is 60s to 90s, the rotation speed of the mixing barrel 1 is 20r / min to 40r / min, and the rotation speed of the second stirring component 4 is 60r / min to 80r / min, so as to improve the stirring efficiency while meeting the mixing uniformity condition.

[0074] Other technical features are the same as those in Example 1 and can achieve the same technical effects, so they will not be described in detail here.

[0075] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0076] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0077] In the present invention, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Those skilled in the art will readily understand that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A fiber-reinforced asphalt mixture uniform mixing device, characterized in that: include: A mixing barrel (1) having an interlayer (101) provided on its surface; A first stirring assembly (2) disposed outside the mixing barrel (1) and driving the mixing barrel (1) to rotate, and a first motor (3) driving the first stirring assembly (2) to rotate; a second stirring assembly (4) disposed inside the mixing barrel (1) and rotatably connected to the mixing barrel (1), and a second motor (5) for driving the second stirring assembly (4) to rotate; a heating element (6) disposed in the interlayer (101); The mixing barrel (1) and the second stirring component (4) are driven to rotate in opposite directions respectively to cause the mixture in the barrel to generate reciprocating motion, and the asphalt is continuously and stably heated by the heating component (6) to ensure the activity and fluidity of the fiber asphalt mixture during the mixing process.

2. The mixing device according to claim 1, characterized in that: The mixing device further comprises a frame (7) for supporting other components, the frame (7) being a square frame structure as a whole and being arranged on the working ground; A sub-frame (701) for supporting the first motor (3) and the second motor (5) is provided on one side of the frame (7); the sub-frame (701) is a multi-layer square frame as a whole; A protective cover (702) is provided on the outside of the auxiliary frame (701), and a heat dissipation fan (703) is provided on the side of the protective cover (702) away from the mixing barrel (1).

3. The mixing device according to claim 2, characterized in that: The first motor (3) is arranged in the auxiliary frame (701), and a first transmission gear (301) is provided at the end of the output shaft thereof; The first stirring assembly (2) comprises: a first transmission shaft (201), a second transmission gear (202), a first bracket (203), a second transmission shaft (204), a third transmission gear (205), a fourth transmission gear (206) and a second bracket (207); a plurality of the first brackets (203) are evenly arranged on the upper end of the frame (7) close to the first motor (3); the first transmission shaft (201) is rotatably connected to at least two of the first brackets (203) via rolling bearings, and the second transmission gear (202) is provided at both ends of the first transmission shaft, and the second transmission gear (202) at one end of the first transmission shaft (201) is provided at the upper end of the frame (7). The transmission gear (202) and the first transmission gear (301) form a gear transmission structure; a plurality of second brackets (207) are evenly arranged on the upper end of the frame (7); the second transmission shaft (204) is rotatably connected to at least two of the second brackets (207) through rolling bearings, and one end of the second transmission shaft (204) is provided with the third transmission gear (205), and the third transmission gear (205) and the second transmission gear (202) at one end of the first transmission shaft (201) form a gear transmission structure; and a plurality of fourth transmission gears (206) are sleeved on the outside of the second transmission shaft (204).

4. The mixing device according to claim 3, characterized in that: The mixing barrel (1) is arranged horizontally, and further comprises: a material port (102), an annular rack (103) and a first stirring blade (104); the material port (102) is arranged on the surface of the mixing barrel (1) and is provided with an openable sealing cover, which is a common channel for feeding and discharging materials; the annular rack (103) is sleeved on the outer surface of the mixing barrel (1) and is rotatably connected to the fourth transmission gear (206) arranged on both sides of the mixing barrel (1); the two first stirring blades (104) are mirror-symmetrically arranged vertically on the inner wall of the mixing barrel (1) and rotate with the mixing barrel (1).

5. The mixing device according to any one of claims 2 to 4, characterized in that: The second motor (5) is arranged at the upper end of the auxiliary frame (701), and the axis of its output shaft is collinear with the axis of the mixing barrel (1); The second stirring assembly (4) comprises: a third transmission shaft (401), a stirring rod (402) and a second stirring blade (403); the axis of the third transmission shaft (401) is colinear with the axis of the mixing barrel (1), and is rotatably connected to the mixing barrel (1) via a rolling bearing, and one end of the third transmission shaft passes through the mixing barrel (1) and is connected to the output shaft of the second motor (5); the second stirring blade (403) is a spiral blade as a whole, and is fixedly connected to the third transmission shaft (401) via a plurality of stirring rods (402) vertically arranged on the surface of the third transmission shaft (401); The gap between the outer side of the second stirring blade (403) and the inner wall of the mixing barrel (1) is 2 mm to 5 mm.

6. The mixing device according to any one of claims 2 to 4, characterized in that: The heating component (6) comprises: a heating wire (601) evenly laid on the inner side of the interlayer (101), heat-conducting oil arranged in the interlayer (101), and a plurality of temperature sensors (602) arranged in the interlayer (101); The heat transfer oil is mineral heat transfer oil or synthetic heat transfer oil.

7. The mixing device according to claim 6, characterized in that: The mixing device further comprises a power supply box (8) arranged on one side of the interior of the protective cover (702); the power supply box (8) is electrically connected to the first motor (3) and the second motor (5) respectively through cables, and is electrically connected to the heating wire (601) through a brush slip ring (801).

8. The mixing device according to claim 7, characterized in that: The mixing device further comprises a controller (9), which is arranged on one side of the protective cover (702), is electrically connected to the power supply box (8), and is respectively communicatively connected to the first motor (3), the second motor (5), the heating component (6), and the power supply box (8).

9. A method for using a fiber-reinforced asphalt mixture uniform mixing device, which is implemented using the mixing device according to any one of claims 1 to 8, characterized in that: The steps include: S1: After checking that the equipment is normal and without damage, close the material port (102) and preheat the mixing drum (1) according to the type of asphalt mixture; S2: After preheating is completed, the material port (102) is turned upward and opened by the first motor (3) and the first stirring component (2), and the hot coarse and fine materials and the fiber mixture weighed according to the mixing ratio are put into the mixing barrel (1) through the material port (102). After that, the material port (102) is closed, and the mixing barrel (1) and the second stirring component (4) are rotated in opposite directions until the mixing is uniform; S3: Stop mixing, open the material port (102) upward, and add the weighed hot asphalt into the mixing barrel (1). Then, close the material port (102), and rotate the mixing barrel (1) and the second stirring assembly (4) in opposite directions until the mixing is uniform; S4: After the mixing barrel (1) is rotated and stopped until the material opening (102) faces downward, the material opening (102) is opened to pour out the mixed material, and at the same time, the second stirring component (4) is kept rotating to push the mixed material away from the material opening (102) toward the material opening (102), and after the mixed material is discharged, the residual mixed material in the area of the material opening (102) is cleared; S5: Repeat steps S2 to S4 to complete the mixing operation of the same type of fiber-reinforced asphalt mixture.

10. The method of use according to claim 9, characterized in that: In step S1, the heating temperature of the ordinary asphalt mixture is 140°C to 160°C, and the heating temperature of the modified asphalt mixture is 150°C to 170°C; In step S2, the mixing time is 60s to 90s, the rotation speed of the mixing barrel (1) is 20r / min to 40r / min, and the rotation speed of the second stirring component (4) is 60r / min to 80r / min; In step S3, the mixing time is 60s to 90s, the rotation speed of the mixing barrel (1) is 20r / min to 40r / min, and the rotation speed of the second stirring component (4) is 60r / min to 80r / min.

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