CN112982088A - Heating and mixing process for regenerated asphalt mixture and mixing station thereof - Google Patents
Heating and mixing process for regenerated asphalt mixture and mixing station thereof Download PDFInfo
- Publication number
- CN112982088A CN112982088A CN202110214573.4A CN202110214573A CN112982088A CN 112982088 A CN112982088 A CN 112982088A CN 202110214573 A CN202110214573 A CN 202110214573A CN 112982088 A CN112982088 A CN 112982088A
- Authority
- CN
- China
- Prior art keywords
- mixing
- preheating
- box
- stirring
- mixture
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
- E01C19/1013—Plant characterised by the mode of operation or the construction of the mixing apparatus; Mixing apparatus
- E01C19/104—Mixing by means of movable members in a non-rotating mixing enclosure, e.g. stirrers
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
- E01C19/1013—Plant characterised by the mode of operation or the construction of the mixing apparatus; Mixing apparatus
- E01C19/104—Mixing by means of movable members in a non-rotating mixing enclosure, e.g. stirrers
- E01C19/1045—Mixing by means of movable members in a non-rotating mixing enclosure, e.g. stirrers the mixture being discharged continuously
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
- E01C19/1059—Controlling the operations; Devices solely for supplying or proportioning the ingredients
- E01C19/1068—Supplying or proportioning the ingredients
Abstract
The invention provides a heating and mixing process of a regenerated asphalt mixture and a mixing station thereof, which comprises an upper material and a lower material which are reasonably proportioned and recycled in a layered manner, a regenerant, a new aggregate and asphalt, wherein the upper material and the lower material are mixed step by step and mixed under reasonable preheating conditions, stirring conditions and heating conditions to produce new asphalt and old asphalt, and a material lifting machine, a movable batching device, a hopper, a first preheating box, a second preheating box, a horizontal stirring mechanism, a steam station, a mixing device and the like in the mixing station are added to carry out reasonable production in cooperation with the process. The heating and mixing process for the recycled asphalt mixture can obtain products with higher quality, is favorable for improving the performance of the products applied to the road surface after the road surface is constructed, and can obtain higher production efficiency, improve the productivity of equipment and be reasonably designed, thereby being suitable for large-scale popularization by combining the heating and mixing station for the recycled asphalt mixture with the process.
Description
Technical Field
The invention belongs to the technical field of regenerated asphalt production, and particularly relates to a regenerated asphalt mixture heating and mixing process and a mixing station thereof.
Background
With the continuous development of economy, the demand of people on the infrastructure is continuously increased, and the investment scale of the highway construction is also continuously increased. Meanwhile, the gravity center of the construction of a plurality of roads is changed from the original pavement construction to maintenance, but a large amount of waste asphalt mixture is generated, and then the problems of environmental pollution, resource waste and the like are caused. The recycled Asphalt is an Asphalt material (RAP) of an old Pavement, which is recycled and reused so as to achieve the purposes of saving mineral resources, protecting the natural environment and reducing the construction cost.
At present, regarding the utilization of RAP, it is generally considered that the operation of digging, collecting, pretreating (breaking and screening) is performed on the asphalt pavement which is out of service or needs to be rebuilt, then the asphalt pavement is remixed with a proper amount of new aggregate and proper asphalt, and stirred to form a recycled material meeting the road building requirement, and the recycled material is continuously utilized in the field of ordinary road engineering. The old aggregate recovered in the recycling method is the old aggregate recovered by once milling, the aging degree of the pavement per se on different layers cannot be considered to be different, and researches show that the variation coefficients of three indexes, namely the petroleum ratio, the mineral aggregate grading and the asphalt aging degree, of the RAP material recovered by layering are lower than that of the RAP material recovered by once milling, so that the quality of the produced regenerated asphalt is not good enough in the prior art because the treatment on the layered collected material is lacked in the recovery process and the mixing and stirring process, including material mixing, preheating, adding a regenerant, stirring and stirring equipment and the like; and the mixing capability of the mixing station can not be adapted to the requirements of mixing, processing and layering recovery of aggregate and new aggregate, and the higher production efficiency can not be achieved only by using the existing mixing station to carry out corresponding production.
Disclosure of Invention
Aiming at the technical problems of the production process and the mixing equipment of the recycled asphalt, the invention provides a recycled asphalt mixture heating and mixing process and a mixing station thereof, which have the advantages of reasonable design, higher production quality and stronger mixing capability.
In order to achieve the aim, the technical scheme adopted by the invention is that the regenerated asphalt mixture heating and mixing process and the mixing station thereof comprise the following steps,
step a, storing the layered and recycled old aggregate according to an upper layer material and a lower layer material;
b, respectively lifting the upper layer material, the lower layer material and the new aggregate to a mixing station;
step c, weighing the lifted upper-layer materials, the lifted lower-layer materials and the lifted new aggregate by three batching trucks respectively, moving and distributing the materials into corresponding hoppers, wherein the weighing ratio is 4:3:15, and temporarily storing the weighed residual materials in the corresponding batching trucks; (ii) a
D, unloading the lower layer material into a preheating tank, continuously spraying a regenerant at high pressure, stirring, gradually preheating to 90-100 ℃, and preheating for 2 hours, wherein the doping rate of the regenerant is 0.11; meanwhile, new aggregate is discharged into a preheating box different from the lower-layer aggregate, new asphalt is continuously pressed in, a new mixture is stirred, the mixture is gradually preheated to 110 ℃, and the mixture is preheated for 4 hours, wherein the doping rate of the new asphalt is 0.15;
step e, mixing the upper layer material into a preheating box in which the lower layer material preheated for 2 hours is located, continuously spraying a regenerant at high pressure, stirring the mixture into an old mixture, gradually preheating the mixture to 110 ℃, and preheating for 2 hours, wherein the doping rate of the regenerant is 0.12;
step f, discharging the old mixture and the new mixture into a mixing box, stirring and gradually heating the mixture to 150 ℃ in the mixing box, and keeping stirring for 2 hours at the temperature of 150 ℃;
and g, cooling the mixture in the mixing tank to 50-60 ℃.
The reclaimed asphalt mixture heating and mixing station comprises a material lifting machine, wherein the material lifting machine is arranged on one side of a mixing steel frame, the output end of the material lifting machine is positioned above the mixing steel frame, the output end of the material lifting machine is provided with a slide carriage, the output end of the slide carriage is provided with a movable batching device, the movable batching device comprises a horizontal batching track, the batching track is movably provided with three batching trucks distributed along the length direction of the batching track, the top of the mixing steel frame is provided with three hoppers in one-to-one correspondence with the three batching trucks, the three hoppers are distributed in a shape like the Chinese character 'pin' and respectively comprise an upper hopper, a lower hopper and a new hopper, a first preheating box is arranged below the upper hopper and the lower hopper, a second preheating box is arranged below the new hopper, and horizontal stirring mechanisms are arranged inside the first preheating box and the second preheating box, the center of the horizontal stirring mechanism is provided with a steam cavity, one end of the horizontal stirring mechanism is provided with a steam pipeline through a rotary joint, the input end of the steam pipeline is provided with a steam station, a regenerant box used for introducing regenerant into the first preheating box and an asphalt box used for introducing new asphalt into the second preheating box are arranged on the mixing steel frame, the regenerant box is provided with a plurality of high-pressure spray pipes, the asphalt box is provided with a plurality of asphalt output pipes, the bottom of the first preheating box and the bottom of the second preheating box are both provided with rapid discharging devices, a mixing device is arranged below the rapid discharging devices and comprises a mixing box, the mixing box is provided with a wall sleeve which is arranged around the side surface of the mixing box in a circle, the wall sleeve is used for introducing high-temperature steam, and a mounting groove is arranged in the middle of the top of the mixing box, a mixing motor is arranged in the mounting groove, and a vertical stirring mechanism is arranged at the output end of the mixing motor.
Preferably, the quick discharging device comprises an upper bottom plate and a lower bottom plate which are connected up and down, at least one conical surface is arranged on the upper bottom plate, the center of the conical surface is provided with a discharge opening, the lower bottom plate is provided with at least one discharge opening, a flower-shaped groove is arranged at the discharge opening, an opening and closing component for opening and closing the discharge opening is arranged in the flower-shaped groove, the opening and closing assembly comprises four holding plates which are held into a closed surface, the holding plates are fan-shaped, the inner side surfaces and the outer side surfaces of the holding plates are arc-shaped surfaces, one end of the holding plate close to the other holding plate is provided with a rotating shaft which is rotationally connected with the flower-shaped groove, a gear is arranged at the bottom of the rotating shaft, a rack is arranged at one side of the gear and is movably arranged in a rack groove, the rack grooves are arranged in the pattern grooves and distributed along the chord direction of the discharge opening, and the driving end of the rack is provided with a driving mechanism.
Preferably, the driving mechanism is arranged on one side of the mixing steel frame, the opening and closing assembly is driven by two driving mechanisms, gears at the bottoms of every two embracing plates in the opening and closing assembly are jointly meshed with one rack, a transition gear is arranged between one gear and the rack, meshing teeth are arranged on two sides of the rack, the moving central line of the rack is positioned between the two gears meshed with the rack, and the rack is arranged at the output end of one driving mechanism.
Preferably, two groups of horizontal stirring mechanisms are arranged in the first preheating tank, a group of horizontal stirring mechanisms are arranged in the second preheating tank, each horizontal stirring mechanism comprises a plurality of groups of stirring rods which are axially distributed, and the distance between the stirring rods of the horizontal stirring mechanisms in the first preheating tank is larger than that between the stirring rods of the horizontal stirring mechanisms in the second preheating tank.
Preferably, the vertical stirring mechanism comprises a plurality of stirring groups distributed up and down, each stirring group comprises at least three stirring blades distributed in a circular array, the overlooking projection and the side-looking projection of each stirring blade are S-shaped, the cross section of each stirring blade is rectangular, and the cross section of each stirring blade is gradually narrowed from the rotation center to the rotation edge.
Preferably, a heat insulation cavity is arranged between the first preheating box and the second preheating box, and heat insulation filler is arranged in the heat insulation cavity.
Preferably, the side of the batching vehicle is rotatably provided with an unloading plate for unloading, and the unloading plate of the batching vehicle for distributing the upper material is arranged in the direction opposite to the unloading plate of the batching vehicle for distributing the lower material.
Compared with the prior art, the invention has the advantages and positive effects that:
1. the heating and mixing process for the regenerated asphalt mixture provided by the invention has the advantages that the upper layer material, the lower layer material, the regenerant and the new aggregate which are recovered in a layered mode are mixed in a reasonable ratio, and the asphalt with higher quality can be obtained under the conditions of optimal preheating temperature, preheating time, mixing temperature, mixing time and mixing station, so that the utilization rate of the old aggregate is effectively improved, the service performance of the pavement is improved, the service life is longer, the design is reasonable, and the process is suitable for large-scale popularization.
2. According to the station for heating and mixing the recycled asphalt mixture, the mixture can be mixed, preheated and stirred step by adopting the movable batching device and the plurality of hoppers, and the preheating efficiency and the mixing efficiency are high; the unloading efficiency of the material can be improved by using the quick unloading device; the mixing device can be used for mixing and heating the mixture with high efficiency. The station is stirred in the heating of regeneration bituminous mixture of this device can stir technology looks adaptation with the heating of regeneration bituminous mixture, and reasonable in design has higher production efficiency to can obtain higher product quality, be fit for extensive popularization.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
FIG. 1 is a schematic structural diagram of a reclaimed asphalt mixture heating and mixing station provided by an embodiment;
FIG. 2 is a schematic structural view of a rapid shoe material device provided by the embodiment;
FIG. 3 is a working diagram of the lower plate, the flower groove and the opening and closing assembly provided by the embodiment;
FIG. 4 is an enlarged schematic view of the structure A in FIG. 3 according to an exemplary embodiment;
FIG. 5 is a top view of the horizontal stirring mechanism, the first preheating chamber and the second preheating chamber provided in the embodiment;
FIG. 6 is an isometric view of an example stirring blade provided;
in the above figures:
1. a material lifting machine; 2. mixing a steel frame; 3. a slide carriage; 4. moving the dosing device; 41. a dosing track; 42. a batching vehicle; 43. unloading the plate; 5. a hopper; 51. an upper layer hopper; 52. a lower layer hopper; 53. a new aggregate bin; 6. a first preheating tank; 7. a second preheating tank; 8. a horizontal stirring mechanism; 81. a steam chamber; 82. a rotary joint; 83. a stirring rod; 9. a steam line; 10. a steam station; 11. a regenerant tank; 12. a high pressure nozzle; 13. an asphalt box; 14. an asphalt output pipe;
15. a quick discharge device; 151. an upper base plate; 152. a lower base plate; 153. a conical surface; 154. a pattern groove; 155. an opening and closing assembly; 1551. a plywood is embraced; 1552. a rotating shaft; 1553. a gear; 1554. a rack; 1555. a rack slot; 1556. a drive mechanism; 156. a discharge opening;
16. a mixing device; 161. a mixing box; 162. a wall sleeve; 163. mounting grooves; 164. a mixing motor; 165. a vertical stirring mechanism; 1651. stirring blades;
17. a heat insulating cavity.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" used herein refer to the same directions as the drawings, and do not limit the structure.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited to the specific embodiments of the present disclosure.
In the embodiment, as shown in fig. 1 to fig. 6, the reclaimed asphalt mixture heating and mixing process and the mixing station thereof provided by the invention comprise the following steps:
step a, storing the layered and recycled old aggregate according to an upper layer material and a lower layer material;
b, respectively lifting the upper layer material, the lower layer material and the new aggregate to a mixing station;
step c, weighing the lifted upper layer material, the lifted lower layer material and the lifted new aggregate by three batching trucks respectively, moving and distributing the weighed materials into corresponding hoppers, wherein the weighing ratio is 4:3:15, and the proportion of the upper layer material and the lower layer material in the total material is controlled to be more than 31%, so that the optimal oil distribution ratio and high water stability are favorably obtained, and the reasonability of the product in the aspect of batching is ensured; the residual materials after the material lifting machine lifts to the batching trucks cannot be directly poured into the hopper, but are respectively temporarily stored in the corresponding batching trucks so as to be convenient for lifting different materials by the lifting machine under the condition of not returning the materials.
D, unloading the lower layer material into a preheating tank, continuously spraying a regenerant at high pressure, stirring, gradually preheating to 90-100 ℃, and preheating for 2 hours, wherein the doping rate of the regenerant is 0.11; meanwhile, new aggregate is discharged into a preheating box different from the lower-layer aggregate, new asphalt is continuously pressed in, a new mixture is stirred, the mixture is gradually preheated to 110 ℃, and the mixture is preheated for 4 hours, wherein the doping rate of the new asphalt is 0.15;
step e, mixing the upper layer material into a preheating box in which the lower layer material preheated for 2 hours is located, continuously spraying a regenerant at high pressure, stirring the mixture into an old mixture, gradually preheating the mixture to 110 ℃, and preheating for 2 hours, wherein the doping rate of the regenerant is 0.12;
regarding the steps d and e, since the high temperature resistance of the upper layer material is higher than that of the lower layer material under the rolling of the vehicle and the direct action of the external environment for a long time, the preheating of the lower layer material can reduce the supply of heat energy; meanwhile, the regenerant is sprayed in two steps, so that a mixture with better uniformity can be obtained, and the aromatic component in the RAP material is improved; the addition rate of the regenerant in the two steps is controlled, so that the control of various components of the asphalt of the mixture, including asphaltene, colloid, aromatic components and saturated components, within a reasonable range is favorably reduced, and a part of the regenerant can be saved; the total preheating time of the new mixture and the old mixture is basically synchronous, and the distribution of the preheating time can improve the subsequent mixing rate of the new mixture and the old mixture and reduce the work load of a mixing box.
Step f, discharging the old mixture and the new mixture into a mixing box, stirring and gradually heating the mixture to 150 ℃ in the mixing box, and keeping stirring for 2 hours at the temperature of 150 ℃; at the temperature, the aging phenomenon of the mixture in the heating process can be prevented, the better uniformity of the total mixture is ensured, the variation coefficient of the product components in each index, such as the indexes of oilstone ratio, mineral aggregate gradation and asphalt aging degree, is reduced, so that a product with higher stability is obtained, and the aims of high-efficiency recycling, energy conservation and environmental protection are fulfilled,
and g, cooling the mixture in the mixing box to 50-60 ℃, so that the transport vehicle can move to the lower part of the mixing box for automatic loading.
The heating and mixing station for the recycled asphalt mixture comprises a material lifting machine 1, wherein the material lifting machine 1 is arranged on one side of a mixing steel frame 2, the output end of the material lifting machine 1 is positioned above the mixing steel frame 2, and the output end of the material lifting machine 1 is provided with a slide carriage 3. The material lifting machine 1, the mixing steel frame 2 and the slide carriage 3 are prior art, and the description of this embodiment is omitted. On the basis of the prior art, the invention is provided with a movable batching device 4 at the output end of a slide carriage 3, the movable batching device 4 comprises a horizontal batching track 41, three batching trucks distributed along the length direction are movably arranged on the batching track 41, three hoppers 5 corresponding to the three batching trucks one by one are arranged at the top of a mixing steel frame 2, the three hoppers 5 are distributed in a shape like a Chinese character 'pin' and respectively comprise an upper hopper 51, a lower hopper 52 and a new hopper 53, a first preheating box 6 is arranged below the upper hopper 51 and the lower hopper 52, a second preheating box 7 is arranged below the new hopper 53, horizontal stirring mechanisms 8 are arranged inside the first preheating box 6 and the second preheating box 7, the centers of the horizontal stirring mechanisms 8 are provided with steam cavities 81, one end of the horizontal stirring mechanisms 8 is provided with a steam pipeline 9 through a rotary joint 82, the input end of the steam pipeline 9 is provided with a steam station 10, the mixing steel frame 2 is provided with a regenerant box 11 used for introducing a regenerant into the first preheating box 6 and an asphalt box 13 used for introducing new asphalt into the second preheating box 7, the regenerant box 11 is provided with a plurality of high-pressure spray pipes 12, the asphalt box 13 is provided with a plurality of asphalt output pipes 14, the bottom of the first preheating box 6 and the bottom of the second preheating box 7 are both provided with quick discharging devices 15, a mixing device 16 is arranged below the quick discharging devices 15, the mixing device 16 comprises a mixing box 161, the mixing box 161 is provided with a wall sleeve 162 arranged around the side surface of the mixing box 161, high-temperature steam is introduced into the wall sleeve 162, a mounting groove 163 is arranged in the middle of the top of the mixing box 161, a mixing motor 164 is arranged in the mounting groove 163, and the output end of the mixing motor 164 is provided with a vertical mixing mechanism 165.
In the invention, three batching trucks are adopted to respectively weigh different materials, so that not only can the weighing efficiency be ensured, but also the excess materials lifted by the material lifting machine 1 can be reasonably stored in the corresponding batching trucks 42, the subsequent batching efficiency can be improved, and the material lifting machine 1 has higher utilization rate; the three hoppers 5 are distributed in a triangular shape, so that the maximum space utilization rate is favorably obtained, the old mixture and the new mixture can be separated, the materials in the upper hopper and the lower hopper can be conveniently received, stirred and mixed by the first preheating box 6, the step-by-step preheating requirement provided by the process can be met, and the adaptability is high. According to the invention, the horizontal stirring mechanisms 8 are arranged in the first preheating box 6 and the second preheating box 7, and due to the rotary connection effect of the rotary joint 82, stable steam flow can be input into the horizontal stirring mechanisms 8 while stirring, the steam introduced into the horizontal stirring mechanisms 8 can exchange heat with materials in the hopper, and higher preheating efficiency can be obtained in a stirring mode while exchanging heat; particularly, the spraying time of the regenerant can be matched with the characteristic that the lower layer material and the lower layer material are added step by step, so that higher mixing uniformity is obtained; new bitumen is pressed from the bitumen tank 13 into the second preheating tank 7, mixing new bitumen into the new aggregates, facilitating the dissolution of asphaltenes in the old mix which is later mixed, and thus obtaining a higher mix quality. The rapid discharge device 15 in the invention can assist the materials in the first preheating box 6 and the second preheating box 7 to rapidly enter the mixing box 16. The mixing tank 16 adopts the mounting groove 163 to mount the mixing motor 164, and the mixing tank top can be directly connected with the quick discharging device in a flat-opening mode on the premise of mounting the mixing motor 164, so that the discharging efficiency of the quick discharging device 15 is further ensured. The material that gets into in the mixing box 161 adopts the form of steam wall cover 162 heating, and the stirring effect of perpendicular rabbling mechanism 165 in addition has improved the mixing efficiency and the quality of material greatly, and especially the heating effect is better, is favorable to guaranteeing that the product has reasonable flow property and inside adhesive force, and wherein, the source of steam in the wall cover is the steam station.
In order to improve the discharging capacity of the quick discharging device, the quick discharging device 15 comprises an upper base plate 151 and a lower base plate 152 which are connected up and down, at least one conical surface 153 is arranged on the upper base plate 151, a discharging opening 156 is arranged in the center of the conical surface 153, at least one discharging opening 156 is arranged on the lower base plate 152, a flower-shaped groove 154 is arranged at the discharging opening, an opening and closing assembly 155 for opening and closing the discharging opening is arranged in the flower-shaped groove 154, the opening and closing assembly 155 comprises four embracing plates 1551 embracing and forming a closed surface, the embracing plates 1551 are fan-shaped, the inner side surface and the outer side surface of each embracing plate 1551 are arc-shaped surfaces, one end of each embracing plate 1551 close to the other embracing plate is provided with a rotating shaft 1552 rotatably connected with the flower-shaped groove, the bottom of each rotating shaft 1552 is provided with a gear 1553, one side of each gear 1553 is provided with a rack 1554, each rack, the drive end of rack 1554 is provided with a drive mechanism 1556. Wherein the tapered surface 153 can promote the movement of the material toward the discharge opening, and the design of the tapered surface 153 has the advantages of high throughput and high space utilization compared with the discharge spout portion of the funnel in the prior art. The opening and closing assembly 155 adopts the working characteristic of horizontal opening and closing, which is beneficial to reducing the longitudinal height of the material output channel and has higher maneuverability. Specifically, the driving mechanism 1556 drives the rack 1554, the rack 1554 moves, the rack 1553 drives the gear below the plate to rotate, the four plate 1551 do the same plane motion, and the discharge opening 156 is opened or closed while the four plate 1551 rotates; the rack groove is a moving space foundation of the rack; the pattern groove 154 is a rotating space base of the holding plate and provides enough space for the holding plate 1551 to rotate in space. The invention adopts the upper bottom plate and the lower bottom plate for assembly, thereby effectively reducing the manufacturing difficulty, reducing the equipment cost and improving the comprehensive utilization rate of components.
Further, a driving mechanism 1556 provided by the invention is arranged at one side of the mixing steel frame 2, the opening and closing assembly 155 is driven by two driving mechanisms 1556, gears at the bottom of each two embracing plates in the opening and closing assembly 155 are jointly meshed with a rack 1554, a transition gear (not shown in the figure) is arranged between one gear and the rack, meshing teeth are arranged at two sides of the rack 1554, the moving center line of the rack 1554 is positioned between the two gears meshed with the rack 1554, and the rack 1554 is arranged at the output end of one driving mechanism 1556. The effect of transition gear makes the pivot by same rack drive have the same direction of rotation, guarantees that two hug closely board 1551 do the same planar motion simultaneously, like this, two hug closely boards of a rack simultaneous transmission to the two sides rack of special design can make it come with higher spatial distribution ability with the cooperation of hug closely board, guarantees simultaneously that four hug closely boards of same subassembly that opens and shuts have the same planar motion. The whole quick discharging device has the advantages of high space utilization rate, reasonable design and good maneuvering performance.
In order to improve the mixing efficiency of the materials in the first preheating box 6 and the mixing efficiency of the materials in the second preheating box 7, the first preheating box 6 is provided with two groups of horizontal stirring mechanisms 8, the second preheating box 7 is provided with one group of horizontal stirring mechanisms 8, and each horizontal stirring mechanism 8 comprises a plurality of groups of axially distributed stirring rods 83 for stirring and mixing; meanwhile, as the average particle size of the new mixture is smaller than that of the old mixture, in order to ensure the stirring efficiency, the distance between the stirring rods of the horizontal stirring mechanism in the first preheating tank is larger than that of the horizontal stirring mechanism in the second preheating tank, so as to improve the stirring efficiency of the corresponding horizontal stirring mechanism 8. In consideration of the matching characteristics of the new mixture and the old mixture, the unit rotating area of the horizontal stirring mechanism in the second preheating box 7 is larger, so that the horizontal stirring mechanism is ensured to have higher stirring capacity.
In order to improve the stirring efficiency of the vertical stirring mechanism, the vertical stirring mechanism 165 provided by the invention comprises a plurality of stirring groups distributed up and down, each stirring group comprises at least three stirring blades 1651 distributed in a circular array, the top projection and the side projection of each stirring blade 1651 are S-shaped, the cross section of each stirring blade is rectangular, and the cross section of each stirring blade is gradually narrowed from the rotation center to the rotation edge.
In order to improve the relative independence of the preheating of the first preheating box 6 and the second preheating box 7, the heat insulation cavity 17 is arranged between the first preheating box 6 and the second preheating box 7, the heat insulation cavity 17 is internally provided with heat insulation filler, and the purpose of heat insulation is achieved by utilizing the heat insulation filler, so that the two preheating boxes can meet the working requirement of step preheating provided by the process.
In order to improve the batching efficiency, the invention provides that the side surface of the batching vehicle 42 is provided with an unloading plate 43 for unloading in a rotating way, namely, a side surface unloading way is adopted. In consideration of the characteristics that the hoppers are distributed in a shape of Chinese character 'pin' and the upper layer hoppers and the lower layer hoppers are arranged side by side, the unloading plate mounting direction of the batching vehicle for distributing the upper layer materials is opposite to that of the batching vehicle for distributing the lower layer materials, so that three batching vehicles can share one batching track, and all the batching vehicles can unload the materials into the corresponding hoppers on the batching tracks, and the batching track has reasonable design and high utilization rate.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.
Claims (8)
1. A heating and mixing process for a recycled asphalt mixture is characterized by comprising the following steps:
step a, storing the layered and recycled old aggregate according to an upper layer material and a lower layer material;
b, respectively lifting the upper layer material, the lower layer material and the new aggregate to a mixing station;
step c, weighing the lifted upper-layer materials, the lifted lower-layer materials and the lifted new aggregate by three batching trucks respectively, moving and distributing the materials into corresponding hoppers, wherein the weighing ratio is 4:3:15, and temporarily storing the weighed residual materials in the corresponding batching trucks;
d, unloading the lower layer material into a preheating tank, continuously spraying a regenerant at high pressure, stirring, gradually preheating to 90-100 ℃, and preheating for 2 hours, wherein the doping rate of the regenerant is 0.11; meanwhile, new aggregate is discharged into a preheating box different from the lower-layer aggregate, new asphalt is continuously pressed in, a new mixture is stirred, the mixture is gradually preheated to 110 ℃, and the mixture is preheated for 4 hours, wherein the doping rate of the new asphalt is 0.15;
step e, mixing the upper layer material into a preheating box in which the lower layer material preheated for 2 hours is located, continuously spraying a regenerant at high pressure, stirring the mixture into an old mixture, gradually preheating the mixture to 110 ℃, and preheating for 2 hours, wherein the doping rate of the regenerant is 0.12;
step f, discharging the old mixture and the new mixture into a mixing box, stirring and gradually heating the mixture to 150 ℃ in the mixing box, and keeping stirring for 2 hours at the temperature of 150 ℃;
and g, cooling the mixture in the mixing tank to 50-60 ℃.
2. The reclaimed asphalt mixture heating and mixing station comprises a material lifting machine, wherein the material lifting machine is arranged on one side of a mixing steel frame, the output end of the material lifting machine is positioned above the mixing steel frame, the output end of the material lifting machine is provided with a slide carriage, and the reclaimed asphalt mixture heating and mixing station is characterized in that the output end of the slide carriage is provided with a movable batching device, the movable batching device comprises a horizontal batching track, three batching trucks distributed along the length direction of the batching track are movably arranged on the batching track, three hoppers in one-to-one correspondence with the three batching trucks are arranged at the top of the mixing steel frame, the three hoppers are distributed in a shape like a Chinese character 'pin' and respectively comprise an upper hopper, a lower hopper and a new hopper, a first preheating box is arranged below the upper hopper and the lower hopper, a second preheating box is arranged below the new hopper, and horizontal stirring mechanisms are arranged inside the first preheating box and the second preheating box, the center of the horizontal stirring mechanism is provided with a steam cavity, one end of the horizontal stirring mechanism is provided with a steam pipeline through a rotary joint, the input end of the steam pipeline is provided with a steam station, a regenerant box used for introducing regenerant into the first preheating box and an asphalt box used for introducing new asphalt into the second preheating box are arranged on the mixing steel frame, the regenerant box is provided with a plurality of high-pressure spray pipes, the asphalt box is provided with a plurality of asphalt output pipes, the bottom of the first preheating box and the bottom of the second preheating box are both provided with rapid discharging devices, a mixing device is arranged below the rapid discharging devices and comprises a mixing box, the mixing box is provided with a wall sleeve which is arranged around the side surface of the mixing box in a circle, the wall sleeve is used for introducing high-temperature steam, and a mounting groove is arranged in the middle of the top of the mixing box, a mixing motor is arranged in the mounting groove, and a vertical stirring mechanism is arranged at the output end of the mixing motor.
3. The reclaimed asphalt mixture heating and mixing station according to claim 2, wherein the quick discharging device comprises an upper base plate and a lower base plate which are connected up and down, at least one conical surface is arranged on the upper base plate, a discharging opening is arranged in the center of the conical surface, at least one discharging opening is arranged on the lower base plate, a flower-shaped groove is arranged at the discharging opening, an opening and closing component for opening and closing the discharging opening is arranged in the flower-shaped groove, the opening and closing component comprises four holding plates which are held into a closed surface, the holding plates are fan-shaped, the inner side surfaces and the outer side surfaces of the holding plates are arc-shaped surfaces, one end of each holding plate close to the other holding plate is provided with a rotating shaft which is rotatably connected with the flower-shaped groove, the bottom of the rotating shaft is provided with a gear, one side of the gear is provided with a rack, the rack grooves are arranged in the pattern grooves and distributed along the chord direction of the discharge opening, and the driving end of the rack is provided with a driving mechanism.
4. The reclaimed asphalt mixture heating and mixing station according to claim 3, wherein the driving mechanism is arranged at one side of the mixing steel frame, the opening and closing assembly is driven by two driving mechanisms, gears at the bottom of each two embracing plates in the opening and closing assembly are matched with a rack together, a transition gear is arranged between one gear and the rack, meshing teeth are arranged on two sides of the rack, the moving center line of the rack is positioned between the two gears meshed with the rack, and the rack is arranged at the output end of one driving mechanism.
5. The reclaimed asphalt mixture heating and mixing station according to claim 4, wherein two sets of horizontal stirring mechanisms are arranged in the first preheating tank, one set of horizontal stirring mechanisms is arranged in the second preheating tank, the horizontal stirring mechanisms comprise a plurality of sets of axially distributed stirring rods, and the distance between the stirring rods of the horizontal stirring mechanisms in the first preheating tank is larger than that between the stirring rods of the horizontal stirring mechanisms in the second preheating tank.
6. The reclaimed asphalt mixture heating and mixing station according to claim 5, wherein the vertical stirring mechanism comprises a plurality of stirring groups distributed up and down, each stirring group comprises at least three stirring blades distributed in a circular array, the top projection and the side projection of each stirring blade are S-shaped, the cross section of each stirring blade is rectangular, and the cross section of each stirring blade is gradually narrowed from the rotation center to the rotation edge.
7. The reclaimed asphalt mix heating and mixing station of claim 6 wherein a thermally insulated chamber is disposed between the first and second preheat tanks, and wherein a thermally insulating filler is disposed in the thermally insulated chamber.
8. The reclaimed asphalt mix heating and mixing station of claim 7 wherein the dispensing trucks are rotatably mounted on their sides with an unloading plate for unloading, the loading plate of the dispensing truck for dispensing the upper tier being mounted in a direction opposite to the loading plate of the dispensing truck for dispensing the lower tier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110214573.4A CN112982088B (en) | 2021-02-25 | 2021-02-25 | Regenerated asphalt mixture heating and mixing station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110214573.4A CN112982088B (en) | 2021-02-25 | 2021-02-25 | Regenerated asphalt mixture heating and mixing station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112982088A true CN112982088A (en) | 2021-06-18 |
| CN112982088B CN112982088B (en) | 2022-08-02 |
Family
ID=76350920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110214573.4A Active CN112982088B (en) | 2021-02-25 | 2021-02-25 | Regenerated asphalt mixture heating and mixing station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112982088B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114405634A (en) * | 2022-02-09 | 2022-04-29 | 张金兰 | Mixed rubber grinding equipment for natural rock asphalt and matrix asphalt |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004055474A1 (en) * | 2004-11-17 | 2006-05-18 | Bayerische Asphalt-Mischwerke GmbH & Co. Kommanditgesellschaft für Straßenbaustoffe | Bitumen mix production for road paving comprises mixing bitumen with broken rock, mineral filler and recycled asphalt granules comprises adding oil to recycled asphalt granules |
| KR20060082367A (en) * | 2005-01-12 | 2006-07-18 | 김옥 | Reproduction system of waste asphalt and waste concrete |
| CN101654347A (en) * | 2009-08-07 | 2010-02-24 | 江苏省交通科学研究院股份有限公司 | Hot in-plant reclaimed asphalt mixture |
| CN102260058A (en) * | 2011-05-25 | 2011-11-30 | 吉林省公路机械有限公司 | Production process of asphalt pavement material based on thermal regeneration of used asphalt pavement materials |
| CN102704373A (en) * | 2011-07-04 | 2012-10-03 | 苏强 | Method and device for waste asphalt mixture thermal regenerative heating |
| CN104773976A (en) * | 2015-04-01 | 2015-07-15 | 同济大学 | Preparation method of plant hot recycled asphalt mixture containing recycling agent |
| CN104844072A (en) * | 2015-04-01 | 2015-08-19 | 同济大学 | Preparation method of plant-mixed hot recycled asphalt mixture |
| CN105601176A (en) * | 2015-12-21 | 2016-05-25 | 安徽省交通规划设计研究总院股份有限公司 | Production method of plant-mixed hot recycled asphalt concrete |
| CN106746926A (en) * | 2016-12-13 | 2017-05-31 | 江苏天诺道路材料科技有限公司 | Separate type plantmix warms the preparation method of reclaimed asphalt mixture |
| CN111499273A (en) * | 2020-04-27 | 2020-08-07 | 河南征远沥青砼有限公司 | Preparation method of hot recycled asphalt mixture |
-
2021
- 2021-02-25 CN CN202110214573.4A patent/CN112982088B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004055474A1 (en) * | 2004-11-17 | 2006-05-18 | Bayerische Asphalt-Mischwerke GmbH & Co. Kommanditgesellschaft für Straßenbaustoffe | Bitumen mix production for road paving comprises mixing bitumen with broken rock, mineral filler and recycled asphalt granules comprises adding oil to recycled asphalt granules |
| KR20060082367A (en) * | 2005-01-12 | 2006-07-18 | 김옥 | Reproduction system of waste asphalt and waste concrete |
| CN101654347A (en) * | 2009-08-07 | 2010-02-24 | 江苏省交通科学研究院股份有限公司 | Hot in-plant reclaimed asphalt mixture |
| CN102260058A (en) * | 2011-05-25 | 2011-11-30 | 吉林省公路机械有限公司 | Production process of asphalt pavement material based on thermal regeneration of used asphalt pavement materials |
| CN102704373A (en) * | 2011-07-04 | 2012-10-03 | 苏强 | Method and device for waste asphalt mixture thermal regenerative heating |
| CN104773976A (en) * | 2015-04-01 | 2015-07-15 | 同济大学 | Preparation method of plant hot recycled asphalt mixture containing recycling agent |
| CN104844072A (en) * | 2015-04-01 | 2015-08-19 | 同济大学 | Preparation method of plant-mixed hot recycled asphalt mixture |
| CN105601176A (en) * | 2015-12-21 | 2016-05-25 | 安徽省交通规划设计研究总院股份有限公司 | Production method of plant-mixed hot recycled asphalt concrete |
| CN106746926A (en) * | 2016-12-13 | 2017-05-31 | 江苏天诺道路材料科技有限公司 | Separate type plantmix warms the preparation method of reclaimed asphalt mixture |
| CN111499273A (en) * | 2020-04-27 | 2020-08-07 | 河南征远沥青砼有限公司 | Preparation method of hot recycled asphalt mixture |
Non-Patent Citations (1)
| Title |
|---|
| 赵世景: "分层热再生沥青混合料配合比设计及路用性能研究", 《中国优秀硕士学位论文全文数据库工程科技II辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114405634A (en) * | 2022-02-09 | 2022-04-29 | 张金兰 | Mixed rubber grinding equipment for natural rock asphalt and matrix asphalt |
| CN114405634B (en) * | 2022-02-09 | 2023-11-14 | 华胜新能源贸易(东营)有限公司 | Mixed colloid mill equipment for natural rock asphalt and matrix asphalt |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112982088B (en) | 2022-08-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112982088B (en) | Regenerated asphalt mixture heating and mixing station | |
| CN211227979U (en) | Cold material paving vehicle | |
| CN106245506A (en) | Multifunction road regenerating device and pavement recycling construction method | |
| CN100334302C (en) | Complete equipment for processing regenerative asphalt concrete | |
| CN201330367Y (en) | In-site warm mixing regeneration remixer for asphalt pavement | |
| CN106223179A (en) | Road surface hot recycling machine and road surface hot reproduction construction method | |
| CN110846983A (en) | Be used for highway construction mechanized pitch device of paving | |
| CN109183583A (en) | It is layered hot milling equipment, the complete unit of the compound in-situ heat regeneration of hot wind and microwave and its construction in layer method | |
| CN205313958U (en) | Paver spiral material distributer from area stirring | |
| RU131738U1 (en) | ASPHALT COAT REPAIR MACHINE | |
| CN101591473A (en) | A kind of SBS modified asphalt production device and production method | |
| CN206477221U (en) | A kind of regenerating stirrer for pitch concrete | |
| CN2756690Y (en) | Processing complete device for regenerated pitch concrete | |
| CN215482138U (en) | Asphalt laying device for highway maintenance construction | |
| CN217869873U (en) | Small-size pitch road surface hot regeneration patching device | |
| CN112301826A (en) | Emulsified asphalt cold-recycling pavement structure and rapid curing method for pavement | |
| CN207295393U (en) | A kind of movable type high liquid limit soil lime admixture equipment | |
| CN111622050A (en) | Construction method for cold regeneration of mixture by adopting foamed asphalt and mixture mixing system | |
| CN215925509U (en) | Intermittent continuous integrated asphalt mixture stirring equipment | |
| CN110304865A (en) | Old cement concrete overlays repair materials and application method | |
| CN214497086U (en) | Regenerated asphalt mixture heating device | |
| CN207130588U (en) | A kind of complete unit of microwave in-situ heat regeneration | |
| CN210122677U (en) | Pavement medium and long term maintenance equipment | |
| CN212270608U (en) | Double-deck device that paves of rubble is stabilized to cement | |
| CN201686927U (en) | Bituminous pavement in-place thermal generation bitumen mixture heating vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |