Plastomer modified asphalt and preparation process thereof

Abstract

The invention relates to the field of plastomer modified asphalt preparation, in particular to plastomer modified asphalt and a preparation process thereof. The invention aims to provide the plastomer modified asphalt and the preparation process thereof, and the plastomer modified asphalt and the preparation process thereof have the beneficial effects that the surfaces of the stirring blades for stirring plastomer modified asphalt raw materials are regularly polished and cleaned under the condition that the stirring blades are not detached, so that the service life of the stirring blades is prolonged, and the workload of regularly maintaining the whole equipment is reduced. According to the technical scheme, the plastomer modified asphalt preparation device comprises a stirring box and power rods rotationally connected to the front side and the rear side of the interior of the stirring box, the middle of each power rod is fixedly connected with a stirring frame, and a plurality of stirring blades are evenly and fixedly connected to each stirring frame in the circumferential direction; the front side and the rear side of the left side of the stirring box are each provided with an inverted-U-shaped hole, and a sliding frame is slidably connected into each inverted-U-shaped hole.

Description

Technical Field

[0001] The present invention relates to the field of plastomer-modified asphalt preparation, and more particularly to a plastomer-modified asphalt and a preparation process thereof. Background Art

[0002] Plastomer-modified asphalt is an asphalt material made by adding a plastomer modifier such as polyethylene (PE), polypropylene (PP), or EVA to a base asphalt. This type of modifier can significantly improve the high-temperature stability, deformation resistance, and adhesion of asphalt while maintaining good low-temperature performance. It is widely used in projects such as high-grade highways and airport runways. When the raw materials of plastomer-modified asphalt are stirred, the stirring equipment in the prior art is not suitable for regularly polishing and cleaning the stirring blade surface for stirring the raw materials of plastomer-modified asphalt without disassembling it. Therefore, the present application is proposed to solve the above-mentioned technical problems. Summary of the Invention

[0003] The purpose of the present invention is to provide a plastomer-modified asphalt and a preparation process thereof, which has the beneficial effect of regularly polishing and cleaning the surface of the stirring blade used to stir the plastomer-modified asphalt raw material without disassembling it, thereby helping to increase the life of the stirring blade while reducing the workload of regular maintenance of the overall equipment.

[0004] The objectives of the present invention are achieved through the following technical solutions: A plastic modified asphalt preparation device, comprising a mixing box and a power rod rotatably connected to the front and rear sides of the mixing box, a mixing frame fixedly connected to the middle of each power rod, and a plurality of mixing blades evenly fixedly connected to each mixing frame along the circumferential direction, an inverted U-shaped hole is respectively provided on the front and rear sides of the left side of the mixing box, a sliding frame is slidably connected in each inverted U-shaped hole, a short rod is rotatably connected to the front and rear sides of each sliding frame, the short rods located on the front and rear sides of each sliding frame are arranged one by one, and a disc is fixedly connected to the adjacent side of every two corresponding short rods, and a plurality of grinding discs are evenly fixedly connected to the surface of each disc along the circumferential direction.

[0005] The bottom of the mixing box is fixed and connected to a discharge frame.

[0006] The bottom of the rear side of the mixing box is rotatably connected with a cross bar, and the right side of the cross bar and the right sides of the two power rods are transmission connected through a first sprocket assembly.

[0007] The left side of each sliding frame is rotatably connected to a rotating rod, and each rotating rod is transmission-connected to short rods on both sides inside its corresponding sliding frame through two sets of second sprocket assemblies.

[0008] The top of the mixing box is fixedly connected to a snap-fit ​​cover, and the front and rear sides of the top of the snap-fit ​​cover are respectively fixed and connected to a feeding frame, the left side of the snap-fit ​​cover is fixedly connected to a rectangular frame, the middle front side of the rectangular frame is rotatably connected to a lead screw, and the lead screw is connected to a concave frame through a lead screw transmission, the top rear side of the concave frame is slidably connected to the rectangular frame, and the front and rear sides of the bottom of the concave frame are respectively fixedly connected to the top of the left side of the two sliding frames.

[0009] The process for preparing the plastic modified asphalt using the above-mentioned preparation device comprises the following steps:

[0010] S1: The raw materials for preparing the plastomer-modified asphalt flow into the mixing box through two feeding frames respectively;

[0011] S2: The raw materials are stirred by multiple stirring blades on each stirring frame, and after stirring and forming, the finished materials are discharged through the discharge frame at the bottom of the mixing box;

[0012] S3: The power rod rotates and any stirring blade on the stirring frame is in a vertical position. The lifting frame moves so that the raised cone at the bottom fits into the corresponding limit groove to rotate and lock the power rod;

[0013] S4: The sliding frame is made to slide into the mixing box through the inverted U-shaped hole, and the mixing blades are cleaned by the discs located on both sides of the sliding frame.

[0014] The plastomer-modified asphalt prepared by the above process is composed of the following raw materials in parts by weight: 100 parts of base asphalt, 7.5 parts of APAO-type plastomer, 2.2 parts of maleic anhydride grafted compatibilizer, and 0.55 parts of sulfur-zinc composite stabilizer. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0016] Figure 1 It is a partial structural schematic diagram of the mixing box of the present invention;

[0017] Figure 2 It is a partial structural schematic diagram of the inverted U-shaped hole of the present invention;

[0018] Figure 3 It is a partial structural schematic diagram of the stirring frame of the present invention;

[0019] Figure 4 It is a partial structural schematic diagram of the power rod of the present invention;

[0020] Figure 5 It is a schematic diagram of the partial structure of the raised cone of the present invention;

[0021] Figure 6It is a partial structural schematic diagram of the buckle cover of the present invention;

[0022] Figure 7 It is a partial structural schematic diagram of the feeding frame of the present invention;

[0023] Figure 8 It is a partial structural schematic diagram of the concave frame of the present invention;

[0024] Figure 9 It is a partial structural diagram of the sliding frame of the present invention;

[0025] Figure 10 It is a partial structural schematic diagram of the rotating rod of the present invention;

[0026] Figure 11 It is a partial structural schematic diagram of the disc of the present invention;

[0027] Figure 12 It is a schematic cross-sectional structural diagram of the grinding sheet of the present invention;

[0028] Figure 13 It is a schematic cross-sectional structural diagram of the lifting frame of the present invention;

[0029] Figure 14 and Figure 15 They are all schematic diagrams of the overall structure of the present invention.

[0030] In the figure: mixing box 101; inverted U-shaped hole 102; discharge frame 103; limit plate 104; power rod 201; stirring frame 202; raised cone 203; cross bar 204; snap-fit ​​cover 301; feed frame 302; rectangular frame 303; lead screw 304; concave frame 401; sliding frame 402; U-shaped baffle 403; rotating rod 501; short rod 502; disc 503; grinding disc 504; lifting frame 601; limit slot 602. DETAILED DESCRIPTION

[0031] A device for preparing plastic modified asphalt includes a mixing box 101 and a power rod 201 rotatably connected to the front and rear sides of the mixing box 101, a mixing frame 202 is fixedly connected to the middle of each power rod 201, and a plurality of mixing blades are evenly fixedly connected to each mixing frame 202 along the circumferential direction, an inverted U-shaped hole 102 is respectively provided on the front and rear sides of the left side of the mixing box 101, a sliding frame 402 is slidably connected in each inverted U-shaped hole 102, and a short rod 502 is rotatably connected to the front and rear sides of each sliding frame 402, and the short rods 502 located on the front and rear sides of each sliding frame 402 are arranged in a one-to-one correspondence, and adjacent sides of every two correspondingly arranged short rods 502 are fixedly connected to a disc 503, and the surface of each disc 503 is evenly fixedly connected to a plurality of grinding discs 504 along the circumferential direction.

[0032] This part is based on Figure 1-10 The embodiments described in 14 and 15 are: in order to facilitate the regular polishing and cleaning of the surface of the stirring blade for stirring the plastic modified asphalt raw material without disassembly, thereby helping to increase the service life of the stirring blade and reduce the workload of regular maintenance of the overall equipment, when in use, the raw materials for producing the plastic modified asphalt are poured into the mixing box 101 in turn, and when the raw materials are stirred, the two power rods 201 are rotated, and when the two power rods 201 rotate, the stirring racks 202 located on the two power rods 201 rotate synchronously, and further, the multiple stirring blades located on each stirring rack 202 perform circular motion synchronously, thereby stirring the inflowing raw materials, and after the stirring work is completed, any one stirring blade is rotated to a vertical direction, and the stirring blade is aligned with the U-shaped gap of the center line of the inverted U-shaped hole 102, and at this time, the sliding frame 402 is slid into the mixing box 101 along the inverted U-shaped hole 102, and when the sliding frame 402 is slid into the mixing box 101, At the same time, the short rods 502 on both sides of each sliding frame 402 rotate, and then the disc 503 on each short rod 502 drives the multiple grinding discs 504 on its surface to perform circular motion, so that the stirring blade in the vertical position slides into the sliding frame 402, and when sliding in, the short rods 502 on both sides of the sliding frame 402 that rotate drive the disc 503 to rotate, and then the multiple grinding discs 504 on the disc 503 perform circular motion. When each of the multiple grinding discs 504 on the disc 503 performs circular motion, the grinding disc 504 cleans and grinds the surface of the stirring blade, reducing the adhesion of materials during stirring, making it convenient for the stirring blade used for stirring plastic modified asphalt raw materials to be regularly polished and cleaned without disassembly. By timely polishing and cleaning the asphalt on the stirring blade, the surface of the stirring blade can be kept clean and smooth, ensuring uniform mixing and sufficient reaction of the asphalt during the stirring process. This helps to maintain the equipment in optimal operating condition, reduces problems such as uneven mixing and local overheating caused by asphalt residue, further optimizes the equipment's operating environment, and improves the equipment's overall stability and reliability. Compared to the prior art where the stirring blades must be removed for cleaning, this is simpler and quicker, thus helping to increase the life of the stirring blades while reducing the workload of regular maintenance of the entire equipment. Secondly, the traditional method of frequently disassembling the stirring blades for cleaning is not only cumbersome to operate, but also easily causes wear and damage to the stirring blades and related connecting parts during the disassembly and installation process.

[0033] The bottom of the mixing box 101 is fixed and connected to a discharge frame 103 .

[0034] This part is based on Figure 1-10 The embodiments described in Figures 14 and 15 are as follows: a discharge frame 103 is fixed to and connected to the bottom of the mixing box 101 by bolts, so that the stirred plastic modified asphalt can flow out through the discharge frame 103.

[0035] The bottom of the rear side of the mixing box 101 is rotatably connected to a cross bar 204 , and the right side of the cross bar 204 and the right sides of the two power rods 201 are transmission-connected via a first sprocket assembly.

[0036] This part is based on Figure 1-10 The embodiments described in 14 and 15 are: when the two power rods 201 are rotated to provide circular motion power to the stirring blades on the stirring frame 202, the first sprocket assembly includes a first sprocket and a first transmission chain, and a first sprocket is fixedly connected to the right side of each power rod 201 and the cross bar 204 by welding, so that multiple first sprockets are connected to each other through the first transmission chain, and the output shaft of the first motor is fixedly connected to the left side of the cross bar 204 by a coupling. The first motor is fixedly connected to the left side of the bottom of the mixing box 101 by bolts, driving the first motor to rotate the cross bar 204. When the cross bar 204 rotates, the multiple power rods 201 rotate synchronously due to the transmission connection of the multiple first sprockets through the transmission chain, and provide circular motion power to the stirring blades on the corresponding stirring frame 202, thereby fully stirring the raw materials in the mixing box 101.

[0037] The left side of each sliding frame 402 is rotatably connected to a rotating rod 501 , and each rotating rod 501 is transmission-connected to the short rods 502 on both sides inside the corresponding sliding frame 402 through two sets of second sprocket assemblies.

[0038] This part is based on Figure 1-10 The embodiments described in 14 and 15 are as follows: when each short rod 502 located on the front and rear sides of the sliding frame 402 rotates synchronously, a rotating rod 501 is rotatably connected to the left side of each sliding frame 402, and the multiple short rods 502 located on the front and rear sides of each sliding frame 402 are divided into two groups, the second sprocket assembly includes a second sprocket and a second transmission chain, the middle part of each group of short rods 502 and the front and rear sides of the corresponding rotating rod 501 are respectively fixedly connected to a second sprocket, and the second sprockets on the corresponding same side are respectively connected through a second transmission chain. 1 is fixedly connected to the output shaft of a second motor through a coupling on the outer side, and the two second motors are fixedly installed on the left side of the two sliding frames 402 by bolts. When each short rod 502 rotates synchronously so that the grinding sheet 504 on the disc 503 grinds and cleans the surface of the stirring blade, the two second motors are driven to rotate the two rotating rods 501, and then under the transmission work of the second sprocket and the second transmission chain, the multiple short rods 502 on both sides of each sliding frame 402 rotate synchronously, providing power for the grinding sheet 504 on the disc 503 to grind and clean the surface of the stirring blade.

[0039] The top of the mixing box 101 is fixedly connected to a snap-fit ​​cover 301, and the front and rear sides of the top of the snap-fit ​​cover 301 are respectively fixed and connected to a feeding frame 302, the left side of the snap-fit ​​cover 301 is fixedly connected to a rectangular frame 303, the middle front side of the rectangular frame 303 is rotatably connected to a screw 304, and the screw 304 is connected to a concave frame 401 by a screw transmission, the top rear side of the concave frame 401 is slidably connected to the rectangular frame 303, and the front and rear sides of the bottom of the concave frame 401 are respectively fixedly connected to the top of the left side of the two sliding frames 402.

[0040] This part is based on Figure 1-10 The embodiments described in 14 and 15 are: when the raw materials flow into the mixing box 101, the raw materials can flow into the mixing box 101 through the feeding frame 302 located on both sides of the snap cover 301, and when the two sliding frames 402 are made to slide synchronously, the left top of the two sliding frames 402 are fixedly connected to the front and back sides of the bottom of the concave frame 401 by welding, and the output shaft of a second motor is fixedly connected to the left side of the screw 304 through a coupling, and the second motor is fixedly connected to the left side of the snap cover 301 by bolts, driving the second motor to rotate the screw 304, so that the concave frame 401 located on the screw 304 and connected to the screw transmission is moved horizontally. When the concave frame 401 is moved horizontally, the two sliding frames 402 located at the bottom of the concave frame 401 slide into the mixing box 101 through the two inverted U-shaped holes 102, and any stirring blade is placed in the sliding frame 402.

[0041] A U-shaped baffle 403 that can fit into the inner shape of the inverted U-shaped hole 102 is fixedly connected to the right side of each sliding frame 402 , and the inner edge of each U-shaped baffle 403 is a sharp surface.

[0042] This part is based on Figure 1-10 The embodiments described in 14 and 15 are: when stirring is carried out in the mixing box 101, in order to facilitate the sealing of the two inverted U-shaped holes 102, before each sliding frame 402 slides into the mixing box 101 through the inverted U-shaped hole 102, the corresponding inverted U-shaped hole 102 is sealed by the U-shaped baffle 403 on the right side of each sliding frame 402 to prevent material from flowing out during stirring in the mixing box 101, and when each sliding frame 402 slides into the mixing box 101 and any stirring blade slides into the sliding frame 402, the sharp surface on the inner edge of each U-shaped baffle 403 is used to preliminarily scrape off the material adhering to the stirring blade, providing a basis for the grinding sheet 504 on the disc 503 to perform grinding work.

[0043] The left side of each power rod 201 is evenly fixed with multiple protruding cones 203 along the circumferential direction of the central axis of the power rod 201. The protruding cones 203 on each power rod 201 are respectively arranged in a one-to-one correspondence with the multiple stirring blades arranged in the circumferential direction of the corresponding stirring frame 202.

[0044] The left side of the mixing box 101 is fixedly connected to a limit plate 104 , and a lifting frame 601 is slidably connected to the limit plate 104 . A limit groove 602 matching the protruding cone 203 is respectively provided on the front and rear sides of the upper surface of the lifting frame 601 .

[0045] This part is based on Figure 1-15 The embodiment described in the embodiment is: in order to facilitate the positioning of the rotational position of the stirring blade on the stirring frame 202, thereby helping the sliding frame 402 to slide the corresponding stirring blade smoothly into the sliding frame 402 to perform the above-mentioned grinding and cleaning work, when in use, a plurality of raised cones 203 are evenly connected to the left end of the power rod 201 along the circumferential direction by welding, and the two sides of the lifting frame 601 are respectively processed with limiting grooves 602 that match the raised cones 203, and each raised cone 203 is respectively arranged in a one-to-one correspondence with the plurality of stirring blades on the stirring frame 202, that is, when the direction of any raised cone 203 is facing upwards, there is a stirring blade in a vertical state, and in order to further facilitate the stirring blade to be in a slidable state. The lifting frame 601 is in a vertical state inside the sliding frame 402, and the movable end of an electric push rod is fixedly connected to the middle of the lifting frame 601 through a flange. The fixed end of the electric push rod is fixedly connected to the bottom of the mixing box 101 through a flange. The electric push rod is driven to make the lifting frame 601 located on the movable end of the electric push rod move upward by relying on the limit plate 104, so that the limit grooves 602 on both sides of the lifting frame 601 can make the two raised cones 203 located below embedded in the two limit grooves 602, so that the power rod 201 is limited and fixed in position by the raised cones 203, which helps the sliding frame 402 to slide the corresponding stirring blade smoothly into the sliding frame 402 to perform the above-mentioned grinding and cleaning work, thereby improving the working stability of the overall equipment. When the sliding frame 402 has finished cleaning the stirring blades and extends out of the mixing box 101, a cleaning tool can be used to extend into the sliding frame 402 from the bottom to clean the residual asphalt inside the sliding frame 402 and on the multiple grinding discs 504 to prevent the asphalt residue from sticking to the inside of the sliding frame 402 and on the multiple grinding discs 504, affecting the next cleaning of the stirring blades.

[0046] The process for preparing the plastic modified asphalt using the above-mentioned preparation device comprises the following steps:

[0047] S1: The raw materials for preparing the plastomer-modified asphalt flow into the mixing box 101 through the two feeding frames 302 respectively;

[0048] S2: The raw materials are stirred by the multiple stirring blades on each stirring frame 202. After stirring and forming, the finished materials are discharged through the discharge frame 103 located at the bottom of the stirring box 101;

[0049] S3: The power rod 201 rotates and any stirring blade on the stirring frame 202 is in a vertical position. The lifting frame 601 moves so that the raised cone 203 located below fits into the corresponding limiting groove 602 to rotate and lock the power rod 201;

[0050] S4: The sliding frame 402 is slid into the mixing box 101 through the inverted U-shaped hole 102 , and the mixing blades are cleaned by the discs 503 located on both sides of the sliding frame 402 .

[0051] The plastomer-modified asphalt prepared by the above process is composed of the following raw materials in parts by weight: 100 parts of base asphalt, 7.5 parts of APAO-type plastomer, 2.2 parts of maleic anhydride grafted compatibilizer, and 0.55 parts of sulfur-zinc composite stabilizer.

Claims

1. A device for preparing plastomer-modified asphalt, comprising a mixing box and power rods rotatably connected to the front and rear sides of the mixing box, wherein a stirring frame is fixedly connected to the middle of each power rod, and each stirring frame is fixedly connected to a plurality of stirring blades uniformly along the circumference thereof, characterized in that: An inverted U-shaped hole is respectively provided on the front and rear sides of the left side of the mixing box, and a sliding frame is slidably connected in each inverted U-shaped hole, and a short rod is rotatably connected on the front and rear sides of each sliding frame. The short rods located on the front and rear sides of each sliding frame are arranged in a one-to-one correspondence, and a disc is fixedly connected to the adjacent sides of every two corresponding short rods, and a plurality of grinding discs are evenly fixedly connected to the surface of each disc along the circumferential direction.

2. The preparation device according to claim 1, characterized in that: The bottom of the mixing box is fixed and connected to a discharge frame.

3. The preparation device according to claim 1, characterized in that: The bottom of the rear side of the mixing box is rotatably connected with a cross bar, and the right side of the cross bar and the right sides of the two power rods are transmission connected through a first sprocket assembly.

4. The preparation device according to claim 1, characterized in that: The left side of each sliding frame is rotatably connected to a rotating rod, and each rotating rod is transmission-connected to the short rods on both sides inside the corresponding sliding frame through two sets of second sprocket assemblies.

5. The preparation device according to claim 1, characterized in that: The top of the mixing box is fixedly connected to a snap-fit ​​cover, and the front and rear sides of the top of the snap-fit ​​cover are respectively fixed and connected to a feeding frame, the left side of the snap-fit ​​cover is fixedly connected to a rectangular frame, the middle front side of the rectangular frame is rotatably connected to a lead screw, and the lead screw is connected to a concave frame through a lead screw transmission, the top rear side of the concave frame is slidably connected to the rectangular frame, and the front and rear sides of the bottom of the concave frame are respectively fixedly connected to the top of the left side of the two sliding frames.

6. The preparation device according to claim 5, characterized in that: A U-shaped baffle which can be matched to the inner shape of the inverted U-shaped hole is fixedly connected to the right side of each sliding frame, and the inner edge of each U-shaped baffle is a sharp surface.

7. The preparation device according to claim 1, characterized in that: The left side of each power rod is evenly fixed with a plurality of protruding cones along the circumferential direction of the central axis of the power rod. The protruding cones on each power rod are respectively arranged in one-to-one correspondence with a plurality of stirring blades arranged in the circumferential direction of the corresponding stirring frame.

8. The preparation device according to claim 7, characterized in that: The left side of the mixing box is fixedly connected to a limit plate, and a lifting frame is slidably connected to the limit plate. The front and rear sides of the upper surface of the lifting frame are respectively provided with a limit groove that matches the raised cone.

9. A process for preparing plastomer-modified asphalt using the preparation device according to any one of claims 1 to 8, characterized in that: The process includes the following steps, S1: The raw materials for preparing the plastomer-modified asphalt flow into the mixing box through two feeding frames respectively; S2: The raw materials are stirred by multiple stirring blades on each stirring frame, and after stirring and forming, the finished materials are discharged through the discharge frame at the bottom of the mixing box; S3: The power rod rotates and any stirring blade on the stirring frame is in a vertical position. The lifting frame moves so that the raised cone at the bottom fits into the corresponding limit groove to rotate and lock the power rod; S4: The sliding frame is made to slide into the mixing box through the inverted U-shaped hole, and the mixing blades are cleaned by the discs located on both sides of the sliding frame.

10. The plastomer-modified asphalt prepared by the process according to claim 9, characterized in that: The plastomer-modified asphalt is composed of the following raw materials in parts by weight: 100 parts of base asphalt, 6-7.5 parts of APAO-type plastomer, 0.8-2.2 parts of maleic anhydride grafted compatibilizer, and 0.3-0.55 parts of sulfur-zinc composite stabilizer.

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