A preparation device and a preparation method for thin layer cover asphalt

Abstract

The present application relates to the technical field of solid material recycling, and particularly relates to a preparation device and a preparation method for thin-layer surface asphalt, which comprises a mixing assembly, an outer mixing barrel fixedly arranged and an inner mixing barrel movably arranged inside the outer mixing barrel, the inner mixing barrel can make circumferential motion relative to the center of the outer mixing barrel; a stirring assembly, a stirring part rotatably connected in the inner mixing barrel, used for mixing and stirring the material in the inner mixing barrel, the top and the bottom of the inner mixing barrel are respectively provided with a second feeding port and a second discharging port, and the second discharging port is arranged on one side close to the center of the outer mixing barrel; and a driving assembly. The mixing assembly, the stirring assembly and the driving assembly are matched with each other, so that the phenomenon of single material concentration caused by centrifugal force during the stirring and mixing of the solid material can be reduced, the final material mixture is more uniform, and the quality and performance of the final thin-layer surface are ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of solid material recycling, and in particular to a preparation device and method for thin-layer surface sealant. BACKGROUND

[0002] In order to slow down the damage to the road surface, various measures are usually taken to maintain the road surface. Thin-layer surface sealant is a commonly used preventive road surface maintenance technology. When used as a surface sealant for asphalt pavement, it can effectively fill the defects of the old road surface, provide a new surface for the old road surface, and effectively improve the high-temperature stability and anti-skid performance of the old road surface, thereby effectively improving the function of the road surface. At present, the thin-layer surface sealant technology has been widely applied, and the thickness of the thin-layer surface sealant is relatively thin. The existing problems in the repair and maintenance of the thin-layer surface sealant are as follows: if the milling and repaving method is used for maintenance and repair, a large amount of waste asphalt mixture will be generated, and the waste asphalt mixture will be stacked in large quantities, thereby occupying land and not meeting the development concept of green environmental protection. In the prior art, there are methods for re-mixing and using the waste asphalt mixture, such as the plant-mixed hot recycling method: the waste asphalt mixture is transported to a mixing station for heating treatment, and different mixing ratios are configured according to the design requirements, so that the waste asphalt mixture meets the design requirements of the road surface and is recycled; the new and old asphalt blending and recycling method: the new asphalt with a higher grade is mixed with the old asphalt, and the softer new asphalt is mixed with the aged old asphalt, and the mixed asphalt meets the standard of road asphalt; and other mixing methods.

[0003] However, in the actual mixing process of the above methods, the asphalt mixture will be affected by the centrifugal force during stirring and mixing, and in particular, the displacement of the solid particles with different masses deviates from the stirring center when they are stirred in a circular motion. Thus, there is a layering phenomenon in the final stirring and mixing of the solid particles, that is, a single material is relatively concentrated in the same layer, such as the solid particles with a larger mass, which are closer to the outside, so that the final mixing uniformity is not high, and the mixing uniformity of the material directly affects the quality and performance of the final thin-layer surface sealant. With the continuous improvement of the quality requirements of the thin-layer surface sealant, in order to further improve the performance, there is an urgent need for an asphalt material mixing and preparation device that can reduce the influence of centrifugal force. SUMMARY

[0004] Some simplifications or omissions may be made in this section, as well as in the summary of the application and the title of the application, in order to avoid obscuring the purpose of this section, the summary of the application and the title of the application, and such simplifications or omissions cannot be used to limit the scope of the application.

[0005] To solve the problems of the prior art, one object of the present application is to provide a preparation device for thin-layer surface sealant.

[0006] In order to achieve the above object, the present application adopts the following technical scheme: a preparation device for thin-layer surface covering asphalt comprises,

[0007] The mixing assembly comprises a fixedly arranged outer mixing barrel and an inner mixing barrel movably arranged inside the outer mixing barrel, the inner mixing barrel is capable of performing circumferential movement relative to the center of the outer mixing barrel, and the sidewall of the outer mixing barrel is respectively provided with a first feeding port and a first discharging port in the material flow direction;

[0008] The stirring assembly is arranged inside the inner mixing barrel and comprises a stirring part rotatably connected to the inner mixing barrel, for mixing and stirring the material in the inner mixing barrel, the top and bottom of the inner mixing barrel are respectively provided with a second feeding port and a second discharging port, and the second discharging port is arranged on the side close to the center of the outer mixing barrel; and

[0009] The driving assembly is arranged on one side of the outer mixing barrel and comprises a driving motor arranged outside the outer mixing barrel, a first driving part arranged inside the outer mixing barrel and used for driving the movement of the inner mixing barrel, and a second driving part arranged inside the outer mixing barrel and used for driving the rotation of the stirring part.

[0010] As a preferred scheme of the preparation device for thin-layer surface covering asphalt, the outer mixing barrel comprises a cylindrical bin one, a conical bin and a cylindrical bin two arranged in sequence from top to bottom, the cylindrical bin two is provided with a longitudinal material conveying auger on one side, the helical blade inside the material conveying auger is connected to the output shaft of the driving motor, the bottom end of the material conveying auger is connected to the first discharging port, and the top end of the material conveying auger is connected to the second feeding port.

[0011] The pipe wall of the material conveying auger is provided with a breakage close to the side of the conical bin, the inner wall of the cylindrical bin two is slidably connected with a connecting pipe matched with the breakage, and the outer wall of the cylindrical bin two is provided with a control member for driving the movement of the connecting pipe, so as to drive the connecting pipe to move out of the cylindrical bin two and close the breakage.

[0012] As a preferred scheme of the preparation device for thin-layer surface covering asphalt, the inner mixing barrel is arranged in not less than two groups, and the not less than two groups of inner mixing barrels are arranged in a ring array relative to the center of the outer mixing barrel.

[0013] The top of the inner mixing barrel is fixedly connected with a conical top cover with a small top and a large bottom, the lower end of the top cover extends into the inner mixing barrel, the top of the inner mixing barrel is provided with a circular baffle, the inner ring diameter of the baffle is smaller than the bottom diameter of the top cover, the second feeding port is formed between the top cover and the baffle, and the bottom of the inner mixing barrel is provided with an electromagnetic ball valve in communication with the second discharging port.

[0014] The inner mixing barrel top is fixedly connected with a material conveying guide plate connected with the material conveying auger, the material conveying guide plate is rotationally connected with the top end of the material conveying auger, and the material removed from the top end of the material conveying auger enters the second feeding port through the material conveying guide plate.

[0015] The first feeding port is arranged on one side of the cylindrical bin close to the second feeding port, or / and is arranged on one side of the second cylindrical bin.

[0016] As a preferred scheme of the preparation device for thin-layer surface-coated asphalt, the stirring part comprises a stirring shaft coaxially connected with the second gear, and at least two groups of stirring blades arranged on the surface of the stirring shaft, the stirring blades are arranged in a ring array relative to the stirring shaft, and the stirring blades are provided with through openings on the surface.

[0017] The openings on the surfaces of the stirring blades in each group are the same in shape and size, and the openings on the surfaces of the stirring blades in adjacent groups are different in distance relative to the stirring shaft.

[0018] As a preferred scheme of the preparation device for thin-layer surface-coated asphalt, the first driving part comprises a support frame arranged on the inner side of the outer mixing barrel and a connecting frame rotationally connected with the support frame, and the inner mixing barrel is connected with the connecting frame.

[0019] The second driving part comprises a first gear rotationally connected with the outer mixing barrel and a second gear coaxially connected with the stirring part, and the first gear and the second gear are engaged.

[0020] As a preferred scheme of the preparation device for thin-layer surface-coated asphalt, the first driving part further comprises a first ratchet wheel fixedly connected with the connecting frame and a first pawl arranged on one side of the support frame and matched with the first ratchet wheel.

[0021] The second driving part further comprises a second ratchet wheel fixedly connected with the first gear and a second pawl arranged on one side of the outer mixing barrel and matched with the second ratchet wheel.

[0022] The direction in which the first pawl limits the rotation of the first ratchet wheel is opposite to the direction in which the second pawl limits the rotation of the second ratchet wheel.

[0023] As a preferred scheme of the preparation device for thin-layer surface-coated asphalt, one side of the outer mixing barrel is provided with a switching part connected with the output shaft of the driving motor, and the first driving part and the second driving part are respectively connected with the output shaft of the driving motor through the switching part.

[0024] As a preferred scheme of the preparation device for thin-layer surface-coating asphalt, the switching part comprises a connecting column in sliding connection with the output shaft of the driving motor, the connecting column rotates synchronously with the output shaft of the driving motor, one side of the connecting column is provided with two groups of friction pads one, and the connecting frame and one side of the first gear are respectively provided with friction pads two matched with the friction pads one.

[0025] When one group of the friction pads one abuts against one group of the friction pads two, the other group of the friction pads one and the friction pads two are separated, and one side of the outer mixing barrel is provided with a limiting piece for fixing the position of the connecting column.

[0026] As a preferred scheme of the preparation device for thin-layer surface-coating asphalt, the switching part comprises a connecting column in sliding connection with the output shaft of the driving motor, the connecting column rotates synchronously with the output shaft of the driving motor, one side of the connecting column is provided with two groups of friction pads one, and the connecting frame and one side of the first gear are respectively provided with friction pads two matched with the friction pads one.

[0027] The limiting groove is annular and is provided with two groups from top to bottom, when the limiting block is separated from one group of the limiting groove and matched with the other group of the limiting groove, the abutting one group of the friction pads one and the friction pads two are separated, and the other group of the friction pads one and one group of the friction pads two are in abutment.

[0028] The preparation device for thin-layer surface-coating asphalt has the following advantages: the mixing assembly, the stirring assembly and the driving assembly are matched with each other, the single material concentration phenomenon caused by centrifugal force during stirring and mixing of the solid material is reduced, the final material mixture is more uniform, and the quality and performance of the final thin-layer surface are ensured.

[0029] To solve the problems in the prior art, another object of the present application is to provide a preparation method for thin-layer surface-coating asphalt.

[0030] To achieve the above objects, the present application adopts the following technical scheme: a preparation method for thin-layer surface-coating asphalt, the preparation device for thin-layer surface-coating asphalt is used, and the following steps are performed:

[0031] The solid material configured in a certain proportion is added to the inner mixing barrel, and the stirring part is driven to rotate and stir by the second driving part;

[0032] The inner mixing barrel is driven to make circular motion around the center of the outer mixing barrel by the first driving part;

[0033] The second discharge port is opened to allow the stirred and mixed solid material to be discharged and fall on the conical bin;

[0034] The spiral blade of the material conveying auger is driven, so that the solid material is pushed to the top end of the material conveying auger from the fracture along the spiral blade, and falls into the inner mixing barrel again through the material guide plate and the second feeding port for mixing;

[0035] When the solid material is uniformly mixed, the spiral blade of the material conveying auger is reversely driven, so that the solid material is pushed to the first discharging port of the cylindrical bin two from the fracture along the spiral blade.

[0036] The preparation method of the thin-layer surface covering asphalt has the same beneficial effects as the preparation device of the thin-layer surface covering asphalt, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0038] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present application.

[0039] Figure 2 It is a schematic diagram of the front view cross-sectional structure of the connecting pipe when it moves from the fracture to the cylindrical bin two.

[0040] Figure 3 It is a schematic diagram of the structure at A shown in the present application. Figure 2

[0041] Figure 4 It is a schematic diagram of the front view cross-sectional structure of the connecting pipe when it moves from the cylindrical bin two to the fracture.

[0042] Figure 5 It is a schematic diagram of the structure at B shown in the present application. Figure 4

[0043] Figure 6 It is a schematic diagram of the structure at B shown in the present application.

[0044] Figure 7 It is a schematic diagram of the structure at B shown in the present application.

[0045] Figure 8 It is a schematic diagram of the structure at B shown in the present application.

[0046] Figure 9 It is a schematic diagram of the structure at B shown in the present application.

[0047] Figure 10 ​​It is a schematic diagram of the top view cross-sectional structure of the outer mixing barrel and the inner mixing barrel of the application.

[0048] Figure 11 It is a schematic diagram of the front view cross-sectional structure at the switching part of the application.

[0049] Figure 12 It is a schematic diagram of the structure at C shown in the application. Figure 11

[0050] Figure 13 It is a schematic diagram of the structure inside the switching part of the application.

[0051] Figure 14 It is a schematic diagram of the structure at D shown in the application. Figure 13

[0052] In the figure: 100, mixing assembly; 101, outer mixing barrel; 101a, cylindrical bin one; 101b, conical bin; 101c, cylindrical bin two; 102, inner mixing barrel; 102a, top cover; 102b, baffle; 102c, electromagnetic ball valve; 102d, material conveying guide plate; 103, first feeding port; 104, first discharging port; 200, stirring assembly; 201, stirring part; 201a, stirring shaft; 201b, stirring blade; 201c, opening; 202, second feeding port; 203, second discharging port; 300, driving assembly; 301, driving motor; 302, first driving part; 302a, support frame; 302b, connecting frame; 302c, first ratchet wheel; 302d, first pawl; 303, second driving part; 303a, first gear; 303b, second gear; 303c, second ratchet wheel; 303d, second pawl; 304, switching part; 304a, connecting column; 304b, friction gasket one; 304c, friction gasket two; 304d, limiting piece; 304d-1, groove; 304d-2, return spring; 304d-3, limiting block; 304d-4, limiting groove; 400, material conveying auger; 401, helical blade; 402, break; 403, connecting pipe; 404, control piece; 404a, control motor; 404b, lead screw; 404c, sliding groove; 404d, sealing plate; 404e, connecting block. DETAILED DESCRIPTION

[0053] In order to make the purpose, features and advantages of the application more obvious and easy to understand, the specific embodiments of the application are described in detail below in combination with the drawings of the specification.

[0054] In the following description, many specific details are set forth in order to provide a thorough understanding of the application, but the application can also be practiced without other different ways from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the application, therefore the application is not limited by the specific embodiments disclosed below.​​

[0055] Second, the "one embodiment" or "an embodiment" referred to herein means a specific feature, structure, characteristic, or combination of features and / or characteristics described herein that can be included in at least one implementation of the present application. The various appearances of "in one embodiment" or "an embodiment" in the specification are not necessarily all referring to the same embodiment.

[0056] Embodiment 1

[0057] Reference Figures 1-5 、 Figure 10 For the first embodiment of the present application, the embodiment provides a preparation device for thin layer covering asphalt, which can reduce the local concentration of single material caused by centrifugal force during mixing, and includes a mixing assembly 100, a stirring assembly 200 and a driving assembly 300. The stirring assembly 200 directly stirs the solid material, and the solid material particles in the stirring assembly 200 move irregularly around the stirring center. Under the action of centrifugal force, the solid particles with large mass move outward along the radial direction, and part of the solid particles move outward to the center of the mixing assembly 100. The mixing assembly 100 can move around the center of the mixing assembly 100 as a whole, and under the action of centrifugal force, the solid particles in the stirring assembly 200 that move to the center of the mixing assembly 100 are moved in the opposite direction. Through the cooperation of the mixing assembly 100 and the stirring assembly 200, the influence of single centrifugal force can be reduced, and the chaotic degree of all solid particles is increased in the process of moving back and forth, so that the mixing effect is improved. The driving assembly 300 can drive the mixing assembly 100 and the stirring assembly 200 respectively.

[0058] Specifically, the mixing assembly 100 includes a fixedly arranged outer mixing barrel 101 and a movably arranged inner mixing barrel 102 inside the outer mixing barrel 101. The inner mixing barrel 102 can move around the center of the outer mixing barrel 101, so that the solid material in the inner mixing barrel 102 moves from the center of the outer mixing barrel 101 to the outside of the outer mixing barrel 101. The side wall of the outer mixing barrel 101 is respectively provided with a first feeding port 103 and a first discharging port 104 according to the direction of material flow. The solid material enters the outer mixing barrel 101 from the first feeding port 103 and mixes uniformly. The solid material with uniform mixing is removed from the first discharging port 104.

[0059] Further, the stirring assembly 200 is arranged inside the inner mixing barrel 102, comprising a stirring part 201 rotatably connected in the inner mixing barrel 102, for mixing and stirring the materials in the inner mixing barrel 102, and the top and bottom of the inner mixing barrel 102 are respectively provided with a second feeding port 202 and a second discharging port 203. The solid materials entering the outer mixing barrel 101 from the first feeding port 103 enter the inner mixing barrel 102 through the second feeding port 202, the uniformly mixed solid materials in the inner mixing barrel 102 are moved out to the outer mixing barrel 101 through the second discharging port 203, and finally are moved out through the first discharging port 104. The second discharging port 203 is arranged on one side close to the center of the outer mixing barrel 101, by driving the stirring assembly 200 and the mixing assembly 100 respectively, the solid materials between the center of the stirring assembly 200 and the center of the mixing assembly 100 are moved back and forth, so that the solid materials in this area are mixed more uniformly, and the second discharging port 203 of the inner mixing barrel 102 is arranged on one side close to the center of the outer mixing barrel 101, so that the uniformly mixed solid materials in this area are discharged from the second discharging port 203. The solid materials in other areas can be pushed to the second discharging port 203 by the stirring part 201, so that all the materials in the inner mixing barrel 102 are finally mixed uniformly and discharged.

[0060] Wherein, the driving assembly 300 is arranged on one side of the outer mixing barrel 101, comprising a driving motor 301 arranged outside the outer mixing barrel 101, a first driving part 302 arranged inside the outer mixing barrel 101 and used for driving the inner mixing barrel 102 to move, and a second driving part 303 arranged inside the outer mixing barrel 101 and used for driving the stirring part 201 to rotate. The driving motor 301 as a power source can drive the first driving part 302 to drive the inner mixing barrel 102 to move in a circular motion, and can drive the second driving part 303 to drive the stirring part 201 to rotate, thereby stirring and mixing the solid materials in the inner mixing barrel 102.

[0061] Working principle: first, the preparation of the need to mix the solid asphalt material through the first feed port 103, the second feed port 202 into the inner mixing barrel 102, and then start the drive motor 301 makes the second drive part 303 drive stirring part 201 rotation, and then on the solid material in the inner mixing barrel 102 under the action of centrifugal force, the solid material in the inner mixing barrel 102 of quality is large along the radial direction to the outside; Then stop driving the second drive part 303, and then through the drive motor 301 makes the first drive part 302 drive the inner mixing barrel 102 do the circular motion, make the quality of solid material in the area close to the second discharge port 203 along the radial direction reverse movement, until the solid material in the area is mixed evenly, and then open the second discharge port 203 and put out the solid material mixed evenly. And then, by stopping driving the first drive part 302, and driving the second drive part 303 to make the stirring part 201 rotate to push the other part of the solid material to the second discharge port 203 area. Then stop driving the second drive part 303, and through the drive motor 301 makes the first drive part 302 drive the inner mixing barrel 102 do the circular motion, and then through the second discharge port 203 discharge. Repeat the above steps, finally realize the uniform mixing of all materials.

[0062] Embodiment 2

[0063] Reference Figures 1-10 , the second embodiment of the application, different from the previous embodiment, this embodiment provides a feed auger 400, which can mix the solid material for many times, further improving the mixing uniformity.

[0064] Specifically, the outer mixing barrel 101 includes cylindrical bin one 101a, conical bin 101b and cylindrical bin two 101c distributed in turn from top to bottom, the inner mixing barrel 102 is arranged in the cylindrical bin one 101a, the cylindrical bin two 101c is provided with a longitudinal feed auger 400 on one side, the helical blade 401 inside the feed auger 400 is connected with the output shaft of the drive motor 301, the bottom end of the feed auger 400 is connected with the first discharge port 104, and the top end of the feed auger 400 is connected with the second feed port 202. By driving the helical blade 401 of the feed auger 400 in the forward direction through the drive motor 301, the solid material can be transported into the inner mixing barrel 102 from the top through the second feed port 202; and by driving the helical blade 401 of the feed auger 400 in the reverse direction through the drive motor 301, the solid material can be moved out of the outer mixing barrel 101 from the bottom through the first discharge port 104. The shell outside the feed auger 400 is fixedly installed with the inner wall of the outer mixing barrel 101, the rotating shaft of the helical blade 401 is connected with the output shaft of the drive motor 301, and the inner wall of the feed auger 400 is provided with a mounting bracket for supporting the rotating shaft of the helical blade 401, and the rotating shaft of the helical blade 401 is rotatably connected with the mounting bracket through a bearing.

[0065] Further, the pipe wall of the conveying auger 400 is provided with a fracture 402 near one side of the conical bin 101b, the inner wall of the cylindrical bin two 101c is slidably connected with a connecting pipe 403 matched with the fracture 402, the outer wall of the cylindrical bin two 101c is provided with a control member 404 for driving the connecting pipe 403 to move, so as to drive the connecting pipe 403 to move out of the cylindrical bin two 101c to close the fracture 402. The solid material moved out of the second discharge port 203 can fall into the conical bin 101b and gather at the fracture 402 to be conveyed by the conveying auger 400 from the second feeding port 202 to the inner mixing barrel 102, so as to further mix and stir.

[0066] The closing or opening of the fracture 402 can be controlled by the control member 404. In the embodiment, the control member 404 includes a control motor 404a arranged outside the cylindrical bin two 101c, the output end of the control motor 404a is connected with a lead screw 404b rotatably connected with the outside of the outer mixing barrel 101, the direction of the lead screw 404b is parallel to the central axis direction of the cylindrical bin two 101c, the side wall of the cylindrical bin two 101c is provided with a sliding groove 404c parallel to the lead screw 404b, one side of the connecting pipe 403 is connected with a sealing plate 404d slidably connected with the sliding groove 404c, the sealing plate 404d can cover the sliding groove 404c during sliding to prevent internal material from overflowing, and one side of the sealing plate 404d is fixedly connected with a connecting block 404e threadedly connected with the lead screw 404b. The control motor 404a drives the lead screw 404b to rotate, so as to drive the connecting block 404e and the sealing plate 404d to move along the direction of the sliding groove 404c, and then drive the connecting pipe 403 to move, so as to control the position of the connecting pipe 403.

[0067] The inner mixing barrel 102 is arranged in not less than two groups, and the not less than two groups of inner mixing barrels 102 are arranged in a ring array relative to the center of the outer mixing barrel 101. The multiple groups of inner mixing barrels 102 can be driven to work at the same time to improve the mixing efficiency. In addition, the multiple groups of inner mixing barrels 102 are independently mixed and stirred, and then the materials can be mixed again after being discharged through the second discharge port 203, so that the uniformity of mixing of the multiple groups of inner mixing barrels 102 is closer to the average value, and then the uniformity of mixing of the same batch of materials is close.

[0068] The top of the inner mixing barrel 102 is fixedly connected with an upper large and lower small conical top cover 102a. The solid material falling into the conical top cover 102a will move into the inner mixing barrel 102 along the conical surface through the second feeding port 202. The lower end of the top cover 102a extends to the inside of the inner mixing barrel 102. The top of the inner mixing barrel 102 is provided with a circular baffle 102b. The upper surface of the baffle 102b is also an upper large and lower small conical surface. The inner ring diameter of the baffle 102b is smaller than the bottom diameter of the top cover 102a. The solid material falling into the conical top cover 102a will fall onto the upper surface of the baffle 102b and finally enter the inner mixing barrel 102. When the solid material in the inner mixing barrel 102 moves upward directly, it will be blocked by the lower surface of the top cover 102a and the baffle 102b and cannot move out directly through the second feeding port 202, preventing the stirring solid material from moving out of the second feeding port 202. The second feeding port 202 is formed between the top cover 102a and the baffle 102b. The bottom of the inner mixing barrel 102 is provided with an electromagnetic ball valve 102c communicating with the second discharging port 203. The electromagnetic ball valve 102c is a prior art. The ball shell-shaped valve inside is controlled to rotate by an electric signal. When the through hole of the ball shell-shaped valve is aligned with the second discharging port 203, the solid material is discharged under the action of gravity. Conversely, the second discharging port 203 is blocked, and the solid material is limited in the inner mixing barrel 102.

[0069] Further, the top of the inner mixing barrel 102 is fixedly connected with a material conveying guide plate 102d connected with the material conveying auger 400. The material conveying guide plate 102d is rotatably connected with the top end of the material conveying auger 400. The material moved out from the top end of the material conveying auger 400 enters the second feeding port 202 through the material conveying guide plate 102d. In the embodiment, the material conveying guide plate 102d is welded with the top of the inner mixing barrel 102 as a whole. A slope channel is connected between the material conveying guide plate 102d and the top of the inner mixing barrel 102. The solid material falls into the inner mixing barrel 102 through the slope channel under the action of gravity. When the inner mixing barrel 102 rotates in a circular motion, the material conveying guide plate 102d rotates relative to the top end of the material conveying auger 400, so that the material conveying channel of the material conveying guide plate 102d is always connected with the inner mixing barrel 102. The solid material conveyed to the top end of the material conveying auger 400 falls into the material conveying guide plate 102d first and then falls into the inner mixing barrel 102 through the second feeding port 202, so as to realize the circulating stirring and mixing.

[0070] The first feeding port 103 can be arranged on one side of the first cylindrical bin 101a close to the second feeding port 202, or on one side of the second cylindrical bin 101c. When the first feeding port 103 is arranged on one side of the first cylindrical bin 101a close to the second feeding port 202, the first feeding port 103 is located above the second feeding port 202, the first driving part 302 is driven by the driving assembly 300 to drive the inner mixing barrel 102 to the first feeding port 103, and then the solid material is added from the first feeding port 103, and the solid material is directly moved into the inner mixing barrel 102 through the second feeding port 202; when the first feeding port 103 is arranged on one side of the second cylindrical bin 101c, the break 402 is closed by the control member 404, and after the solid material is added from the first feeding port 103, the solid material falls into the conveying auger 400, the spiral blade 401 of the conveying auger 400 is driven to rotate by the driving motor 301, so that the solid material is pushed to move upward to the top of the conveying auger 400, and then enters the inner mixing barrel 102 through the conveying guide plate 102d and the second feeding port 202.

[0071] It is worth noting that for the above-mentioned first feeding port 103 arranged in different positions, different application scenarios can be realized. When the first feeding port 103 is arranged on one side of the first cylindrical bin 101a close to the second feeding port 202, a single mass, volume similar solid material can be added from the same first feeding port 103 to the second feeding port 202, such as powder solid material added to the same inner mixing barrel 102, and mass similar large particle solid material added to another inner mixing barrel 102. Since the mass and volume of the solid material are similar, the solid material is less affected by the centrifugal force during stirring and turning, so the different inner mixing barrels 102 are first stirred uniformly, and then discharged to the conical bin 101b through the second discharge port 203 for mixing, and then the mixed solid material enters the conveying auger 400 at the break 402, and is then conveyed to the top, so that the mixed solid material with different mass and volume is randomly entered into different groups of inner mixing barrels 102, and then the second driving part 303 and the first driving part 302 are driven reciprocally to realize the mixing of solid materials with different mass and volume. The advantage of this operation step is that the mixing uniformity of the solid material with similar mass and volume is also high, and the mixing uniformity is better, and the disadvantage is that the operation step is more complicated, which affects the work efficiency. Figure 10 As shown in the figure, the solid arrows represent the direction of the circular motion of the inner mixing barrel 102, and the white arrows represent the direction of the rotation of the stirring part 201 in the inner mixing barrel 102; the dashed black arrows represent the direction of the centrifugal force acting on the whole inner mixing barrel 102, and the dashed white arrows represent the direction of the centrifugal force acting on each position in the inner mixing barrel 102.

[0072] When the first feeding port 103 is arranged at one side of the cylindrical bin two 101c, the solid material arranged in a certain proportion can be directly added into the cylindrical bin two 101c from the only first feeding port 103, and then enters the feeding auger 400, and is pushed into each inner mixing barrel 102 by the spiral blade 401 of the feeding auger 400, and then the second driving part 303 and the first driving part 302 are reciprocatingly driven, so that the solid material is mixed. The advantage of this operation step is that the material adding mode is simple and the operation is convenient, but the mixing uniformity is slightly low. In actual use, the first feeding port 103 can be arranged at one side of the cylindrical bin one 101a close to the second feeding port 202 and at one side of the cylindrical bin two 101c, and then the specific requirements can be flexibly selected.

[0073] Preferably, the stirring part 201 comprises a stirring shaft 201a coaxially connected with the second gear 303b and at least two groups of stirring blades 201b arranged on the surface of the stirring shaft 201a. The at least two groups of stirring blades 201b are arranged in a ring array relative to the stirring shaft 201a, and the stirring blades 201b are provided with through openings 201c. The stirring blades 201b rotate with the stirring shaft 201a to stir the solid material, and the through openings 201c are arranged to facilitate the movement of the solid particles with large mass through the openings 201c under the action of centrifugal force, thereby improving the mixing effect.

[0074] The shapes and sizes of the openings 201c on the surfaces of the stirring blades 201b in each group are the same, and the distances of the openings 201c on the surfaces of the adjacent groups of stirring blades 201b relative to the stirring shaft 201a are different. The stirring effect of the stirring blades 201b on the solid material is related to the effective pushing area of the stirring blades 201b relative to the solid material. If the distances of the openings 201c of the stirring blades 201b in each group relative to the stirring shaft 201a are the same, the solid material in the opening 201c area cannot be stirred and pushed, thereby affecting the mixing effect. By arranging the distances of the openings 201c on the surfaces of the adjacent groups of stirring blades 201b relative to the stirring shaft 201a to be different, the solid material that cannot be stirred and pushed by the openings 201c of one group of stirring blades 201b can be stirred and pushed by the next group of stirring blades 201b. The arrangement of the openings 201c keeps the solid material connected between the adjacent stirring blades 201b, and the solid particles with large mass can still move through the openings 201c.

[0075] The application discloses a preparation method of thin-layer surface covering asphalt, and adopts a preparation device for the thin-layer surface covering asphalt, and operates according to the following steps: solid materials configured in a certain proportion are added into an inner mixing barrel 102, and a stirring part 201 is driven to rotate and stir by a second driving part 303; the inner mixing barrel 102 is driven to make a circular motion around the center of an outer mixing barrel 101 by a first driving part 302; a second discharge port 203 is opened to make the stirred and mixed solid materials fall on a conical bin 101b; the spiral blades 401 of a feeding auger 400 are driven to push the solid materials from a fracture 402 to the top end of the feeding auger 400 along the spiral blades 401, and the solid materials fall into the inner mixing barrel 102 again through a feeding guide plate 102d and a second feeding port 202 to be stirred and mixed; when the solid materials are uniformly mixed, the spiral blades 401 of the feeding auger 400 are reversely driven to push the solid materials from the fracture 402 to a first discharge port 104 of a cylindrical bin 101c to be discharged.

[0076] The rest of the structure is the same as that of the embodiment 1.

[0077] Embodiment 3

[0078] Referring to Figures 1-14 The third embodiment of the application is different from the above embodiment, and the third embodiment provides a preferred implementation structure of the first driving part 302 and the second driving part 303, so that the inner mixing barrel 102 makes a circular motion around the center of the outer mixing barrel 101 while the stirring part 201 is synchronously stirred and turned over, the centrifugal force brings about a deviation influence in the motion process of the two, and the second driving part 303 and the first driving part 302 are not driven respectively.

[0079] Specifically, the first driving part 302 comprises a support frame 302a arranged on the inner side of the outer mixing barrel 101 and a connecting frame 302b rotationally connected with the support frame 302a, and the inner mixing barrel 102 is connected with the connecting frame 302b; the second driving part 303 comprises a first gear 303a rotationally connected with the outer mixing barrel 101 and a second gear 303b coaxially connected with the stirring part 201, and the first gear 303a and the second gear 303b are engaged. The first gear 303a can drive the second gear 303b to rotate, so as to drive the stirring part 201 to stir in the inner mixing barrel 102; after the first gear 303a is fixed, the connecting frame 302b is driven to rotate to drive the inner mixing barrel 102, so that the second gear 303b makes a circular motion around the first gear 303a while rotating, and the stirring part 201 can stir in the inner mixing barrel 102 while driving the inner mixing barrel 102 to make a circular motion around the center of the outer mixing barrel 101.

[0080] In actual operation, since the centrifugal force is proportional to the mass of the solid material, the radius of the circular motion, and the square of the angular velocity of the circular motion, and the circular motion of the inner mixing barrel 102 and the stirring rotation motion of the stirring part 201 occur simultaneously, the solid material located on the side of the second discharge port 203 is affected by the centrifugal force of the two motions in opposite directions, so that the effect of the centrifugal force in a single direction is inhibited, and the closer to the second discharge port 203, the more prominent the effect. Therefore, after stirring and mixing, the electromagnetic ball valve 102c located at the second discharge port 203 can be directly opened for discharging, and the solid material near the area is affected by the centrifugal force the least after stirring, and the mixing uniformity is better. According to different production and use requirements, the diameter parameters of the first gear 303a and the second gear 303b can be adjusted to adjust the size of the resultant force of the centrifugal force on the solid material near the second discharge port 203.

[0081] Further, the first driving part 302 further comprises a first ratchet wheel 302c fixedly connected with the connecting frame 302b, and a first pawl 302d arranged on one side of the supporting frame 302a and matched with the first ratchet wheel 302c; the second driving part 303 further comprises a second ratchet wheel 303c fixedly connected with the first gear 303a, and a second pawl 303d arranged on one side of the outer mixing barrel 101 and matched with the second ratchet wheel 303c; the ratchet wheel and pawl structure is a prior art, the pawl can make the ratchet wheel rotate in one direction and prevent the ratchet wheel from rotating in the opposite direction. In the embodiment, the first pawl 302d and the second pawl 303d can rotate around the same fixed shaft and are respectively connected with the fixed shaft through independent torsional springs for resetting after rotation. The direction in which the first pawl 302d limits the rotation of the first ratchet wheel 302c is opposite to the direction in which the second pawl 303d limits the rotation of the second ratchet wheel 303c. In the embodiment, when the driving motor 301 drives the first ratchet wheel 302c to rotate, the helical blade 401 in the feeding auger 400 is driven by the output shaft of the driving motor 301 to rotate in the opposite direction to push the solid material downward; and when the driving motor 301 drives the second ratchet wheel 303c to rotate, the helical blade 401 in the feeding auger 400 is driven by the output shaft of the driving motor 301 to rotate in the forward direction to push the solid material upward.

[0082] Further, the outer mixing barrel 101 is provided with a switching part 304 connected with the output shaft of the driving motor 301, and the first driving part 302 and the second driving part 303 are respectively connected with the output shaft of the driving motor 301 through the switching part 304. The switching part 304 is used to adjust the control of the first driving part 302 and the second driving part 303.

[0083] The switching part 304 comprises a connecting column 304a which is in sliding connection with the output shaft of the driving motor 301. In this embodiment, the surface of the output shaft of the driving motor 301 is provided with longitudinal protrusions, and one side of the connecting column 304a is provided with a positioning groove which is matched with the limiting strip. Thus, the connecting column 304a can rotate synchronously with the output shaft of the driving motor 301, and can also move up and down, which facilitates the switching action. One side of the connecting column 304a is provided with two groups of friction pads 304b, and the connecting frame 302b and one side of the first gear 303a are respectively provided with friction pads 304c which are matched with the friction pads 304b. The friction pads 304b and the friction pads 304c can be replaced periodically, and when the two groups of friction pads 304b and the friction pads 304c abut, the transmission can be realized through friction, and the principle is similar to the clutching piece in the prior art.

[0084] When one group of friction pads 304b and one group of friction pads 304c abut, the other group of friction pads 304b and the friction pads 304c are separated, and one side of the outer mixing barrel 101 is provided with a limiting part 304d which is used for fixing the position of the connecting column 304a. The different groups of friction pads 304b and the friction pads 304c are abutted through the up and down sliding of the connecting column 304a, so as to switch the rotating output. The abutment is maintained by fixing the position of the connecting column 304a, so as to prevent the power loss caused by the friction pads 304b and one group of friction pads 304c during normal work.

[0085] Preferably, the limiting part 304d comprises a groove 304d-1 which is arranged on one side of the outer mixing barrel 101, a reset spring 304d-2 which is arranged in the groove 304d-1, and a limiting block 304d-3 which is arranged at the end of the reset spring 304d-2. The surface of the connecting column 304a is provided with a limiting groove 304d-4 which is matched with the limiting block 304d-3. The reset spring 304d-2 pushes the limiting block 304d-3 to one side of the limiting groove 304d-4, and the limiting block 304d-3 is clamped into the limiting groove 304d-4, so as to fix the position of the connecting column 304a. The reset spring 304d-2 can be extended and reset. When the limiting block 304d-3 is compressed by external force and the reset spring 304d-2 is retracted, the limiting block 304d-3 is separated from the limiting groove 304d-4, so as to facilitate the up and down sliding of the connecting column 304a. When the other limiting groove 304d-4 is aligned with the limiting block 304d-3, the limiting block 304d-3 limits the limiting groove 304d-4 under the action of the reset spring 304d-2, and the switching of the connecting column 304a is completed.

[0086] The limiting groove 304d-4 is annular and has two groups from top to bottom. When the limiting block 304d-3 is separated from one group of limiting grooves 304d-4 and matched with the other group of limiting grooves 304d-4, the abutting group of friction pads one 304b is separated from the friction pad two 304c, and the other group of friction pads one 304b is abutted between the group of friction pads two 304c. In this embodiment, in order to reduce the rotating wear between the limiting block 304d-3 and the limiting groove 304d-4, a plurality of groups of rolling steel balls are arranged on the side of the limiting block 304d-3 close to the limiting groove 304d-4. When the connecting column 304a rotates, the steel balls roll, reducing the friction resistance between the two. In this embodiment, a third group of limiting grooves 304d-4 can also be provided between the above two groups of limiting grooves 304d-4, so that when the limiting block 304d-3 limits the limiting groove 304d-4 in the middle group, the friction pad one 304b at the upper and lower ends is separated from the friction pad two 304c, and the output shaft of the driving motor 301 only drives the spiral blade 401 to rotate.

[0087] The remaining structure is the same as that of Embodiment 2.

[0088] Working principle: when the stirring part 201 needs to rotate alone, pull the connecting column 304a upwards, so that the limiting block 304d-3 limits the lowermost limiting groove 304d-4. At this time, the friction pad one 304b above the connecting column 304a is abutted with the friction pad two 304c on one side of the first gear 303a. Then reverse drive the driving motor 301, and the first gear 303a is driven to rotate by friction. At this time, the second ratchet wheel 303c follows the rotating direction of the first gear 303a and is not blocked by the second pawl 303d. The second gear 303b has a tendency to rotate around the first gear 303a due to meshing with the first gear 303a, and the connecting frame 302b and the first ratchet wheel 302c follow the tendency of the second gear 303b to rotate around the first gear 303a, which is blocked by the first pawl 302d. Only the second gear 303b itself rotates to drive the stirring part 201 to rotate alone for stirring.

[0089] When the inner mixing barrels 102 need to be kept rotating while doing circumferential motion, the connecting column 304a is pressed down, so that the limiting block 304d-3 limits the upper limiting slot 304d-4, at this time, the friction pad one 304b below the connecting column 304a abuts against the friction pad two 304c on one side of the connecting frame 302b, then the driving motor 301 is driven in the positive direction, at the same time, the connecting frame 302b is driven to rotate by the friction force, at this time, the first ratchet wheel 302c follows the rotating direction of the connecting frame 302b and is not blocked by the first pawl 302d, the connecting frame 302b drives the whole inner mixing barrels 102 to do circumferential motion, so that the second gear 303b on the top of the inner mixing barrels 102 follows the circumferential motion around the first gear 303a, the second gear 303b does circumferential motion around the first gear 303a and rotates at the same time due to the meshing with the first gear 303a, the second ratchet wheel 303c is blocked by the second pawl 303d and cannot rotate in this rotating direction, so the second gear 303b does circumferential motion around the first gear 303a and rotates at the same time, thereby driving the stirring part 201 to stir the inner mixing barrels 102.

[0090] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application but not limit the present application, although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. An apparatus for the preparation of thin layer of surfacing asphalt, characterized by: The utility model relates to a mixing device, which comprises a fixedly arranged outer mixing barrel (101) and an inner mixing barrel (102) movably arranged inside the outer mixing barrel (101), the inner mixing barrel (102) can make circumferential motion relative to the center of the outer mixing barrel (101), and the sidewall of the outer mixing barrel (101) is respectively provided with a first feeding port (103) and a first discharging port (104) in the material flow direction. The utility model relates to a mixing device, which comprises a fixedly arranged outer mixing barrel (101) and an inner mixing barrel (102) movably arranged inside the outer mixing barrel (101), the inner mixing barrel (102) can make circumferential motion relative to the center of the outer mixing barrel (101), and the sidewall of the outer mixing barrel (101) is respectively provided with a first feeding port (103) and a first discharging port (104) in the material flow direction. The utility model relates to a mixing device, which comprises a fixedly arranged outer mixing barrel (101) and an inner mixing barrel (102) movably arranged inside the outer mixing barrel (101), the inner mixing barrel (102) can make circumferential motion relative to the center of the outer mixing barrel (101), and the sidewall of the outer mixing barrel (101) is respectively provided with a first feeding port (103) and a first discharging port (104) in the material flow direction. The outer mixing barrel (101) comprises a cylindrical bin one (101a), a conical bin (101b) and a cylindrical bin two (101c) arranged in sequence from top to bottom, one side of the cylindrical bin two (101c) is provided with a longitudinal material conveying auger (400), the spiral blade (401) inside the material conveying auger (400) is connected with the output shaft of the driving motor (301), the bottom end of the material conveying auger (400) is connected with the first discharging port (104), and the top end of the material conveying auger (400) is connected with the second feeding port (202). The pipe wall of the material conveying auger (400) is provided with a break (402) on the side close to the conical bin (101b), the inner wall of the cylindrical bin two (101c) is slidably connected with a connecting pipe (403) matched with the break (402), and the outer wall of the cylindrical bin two (101c) is provided with a control member (404) for driving the movement of the connecting pipe (403), so as to drive the connecting pipe (403) to move out of the cylindrical bin two (101c) and close the break (402). The inner mixing barrel (102) is arranged in not less than two groups, and the not less than two groups of inner mixing barrels (102) are arranged in an annular array relative to the center of the outer mixing barrel (101). ​ The top of the inner mixing barrel (102) is fixedly connected with a top cover (102a) with a small top and a large bottom, the lower end of the top cover (102a) extends to the inside of the inner mixing barrel (102), the top of the inner mixing barrel (102) is provided with a circular baffle (102b), the inner ring diameter of the baffle (102b) is smaller than the bottom diameter of the top cover (102a), the second feeding port (202) is formed between the top cover (102a) and the baffle (102b), and the bottom of the inner mixing barrel (102) is provided with an electromagnetic ball valve (102c) in communication with the second discharging port (203); The top of the inner mixing barrel (102) is fixedly connected with a material conveying guide plate (102d) connected with the material conveying auger (400), the material conveying guide plate (102d) is rotatably connected with the top end of the material conveying auger (400), and the material removed from the top end of the material conveying auger (400) enters the second feeding port (202) through the material conveying guide plate (102d); The first feeding port (103) is arranged on one side of the cylindrical bin one (101a) close to the second feeding port (202), or / and on one side of the cylindrical bin two (101c); The stirring part (201) comprises a stirring shaft (201a) coaxially connected with the second gear (303b) and a plurality of groups of stirring blades (201b) arranged on the surface of the stirring shaft (201a), the plurality of groups of stirring blades (201b) are arranged in an annular array relative to the stirring shaft (201a), and the surface of the stirring blade (201b) is provided with a penetrating opening (201c); The openings (201c) on the surfaces of the stirring blades (201b) in each group are the same in shape and size, and the distances of the openings (201c) on the surfaces of the adjacent groups of stirring blades (201b) relative to the stirring shaft (201a) are different; The first driving part (302) comprises a support frame (302a) arranged on the inner side of the outer mixing barrel (101) and a connecting frame (302b) rotatably connected with the support frame (302a), and the inner mixing barrel (102) is connected with the connecting frame (302b); The second driving part (303) comprises a first gear (303a) rotatably connected with the outer mixing barrel (101) and a second gear (303b) coaxially connected with the stirring part (201), and the first gear (303a) and the second gear (303b) are engaged; The first driving part (302) further comprises a first ratchet wheel (302c) fixedly connected with the connecting frame (302b) and a first pawl (302d) arranged on one side of the support frame (302a) and matched with the first ratchet wheel (302c); The second driving part (303) further comprises a second ratchet wheel (303c) fixedly connected with the first gear (303a) and a second pawl (303d) arranged on one side of the outer mixing barrel (101) and matched with the second ratchet wheel (303c); The direction in which the first pawl (302d) limits the rotation of the first ratchet wheel (302c) is opposite to the direction in which the second pawl (303d) limits the rotation of the second ratchet wheel (303c). The outer mixing barrel (101) is provided with a switching part (304) connected with the output shaft of the driving motor (301), and the first driving part (302) and the second driving part (303) are respectively connected with the output shaft of the driving motor (301) through the switching part (304).

2. The apparatus for preparing thin layer of cover asphalt as claimed in claim 1, wherein: The switching part (304) comprises a connecting column (304a) in sliding connection with the output shaft of the driving motor (301), the connecting column (304a) rotates synchronously with the output shaft of the driving motor (301), and one side of the connecting column (304a) is provided with two groups of friction pads (304b), and the connecting frame (302b) and one side of the first gear (303a) are respectively provided with friction pads (304c) matched with the friction pads (304b). When one group of friction pads (304b) and one group of friction pads (304c) are in abutment, the other group of friction pads (304b) and the friction pads (304c) are separated, and the outer mixing barrel (101) is provided with a limiting part (304d) for fixing the position of the connecting column (304a).

3. The apparatus for preparing thin layer of cover asphalt as claimed in claim 2, wherein: The limiting part (304d) comprises a groove (304d-1) provided on one side of the outer mixing barrel (101), a reset spring (304d-2) provided in the groove (304d-1), and a limiting block (304d-3) provided at the end of the reset spring (304d-2), and the surface of the connecting column (304a) is provided with a limiting groove (304d-4) matched with the limiting block (304d-3). The limiting groove (304d-4) is annular and has two groups from top to bottom, when the limiting block (304d-3) is separated from one group of limiting grooves (304d-4) and matched with the other group of limiting grooves (304d-4), the abutting one group of friction pads (304b) and the friction pads (304c) are separated, and the other group of friction pads (304b) and one group of friction pads (304c) are in abutment.

4. A method for preparing a thin layer of a surface seal coat asphalt using the apparatus for preparing a thin layer of a surface seal coat asphalt according to claim 1, characterized by: The following steps are operated: The solid-state material configured in a certain proportion is added to the inner mixing barrel (102), and the stirring part (201) is driven to rotate and stir by the second driving part (303); The inner mixing barrel (102) is driven to make a circular motion around the center of the outer mixing barrel (101) by the first driving part (302); The second discharge port (203) is opened to allow the stirred and mixed solid-state material to fall onto the conical bin (101b); The spiral blade (401) of the material conveying auger (400) is driven, so that the solid-state material is pushed from the fracture (402) to the top of the material conveying auger (400) along with the spiral blade (401), and falls into the inner mixing barrel (102) again through the material guide plate (102d) and the second feeding port (202) for stirring and mixing; When the solid-state material is uniformly mixed, the spiral blade (401) of the material conveying auger (400) is reversely driven, so that the solid-state material is pushed from the fracture (402) to the first discharge port (104) of the cylindrical bin two (101c) along with the spiral blade (401).

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