Reclaimed asphalt pavement aggregate stripping apparatus

Abstract

A reclaimed asphalt pavement aggregate stripping apparatus, comprising a breaking drum, a stirring and breaking assembly and a separation drum. The breaking drum comprises a body drum (1) and an aggregate separation box (4), the aggregate separation box (4) being sleeved on the lower portion of the body drum (1); the stirring and breaking assembly comprises an aggregate conveying shaft (2), a spiral cutting blade (3) and multiple groups of scissor blades, the multiple groups of scissor blades being arranged at intervals on the upper portion of the inner side wall of the body drum (1); each group of scissor blades comprises two scissor blade bodies (6) spaced apart from each other, the two scissor blade bodies (6) allowing the spiral cutting blade (3) to pass through therebetween; the separation drum comprises a housing (7), an inner drum (24) and a rotating shaft, a side plate of the inner drum (24) being provided with a filtering gap.

Description

Asphalt pavement recycling stone stripping equipment Technical Field

[0001] The present invention belongs to the technical field of asphalt crushing and recycling, and more specifically, relates to an asphalt pavement recycling stone stripping device. Background Art

[0002] During the recycling process of old asphalt stones, the materials obtained after secondary crushing will still contain a lot of asphalt mortar "black stones" which are aggregates of small stones and old asphalt. On the one hand, these aggregates will reduce the contact area between the regeneration agent and the old asphalt, and on the other hand, they will also affect the contact area between the old stones and the new asphalt, making it impossible for the new asphalt to fully cover the old material, and unable to effectively combine the new and old materials together, and unable to meet the requirements of direct recycling. Technical issues

[0003] The present invention provides an asphalt pavement recycling stone stripping device, which aims to solve the problem that the "black stone" obtained after secondary crushing cannot meet the requirements of direct recycling. Solution

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is to provide an asphalt pavement recycling stone stripping device, comprising:

[0005] The crushing barrel comprises a main barrel and a material distribution box, wherein the main barrel is provided with a material feed port, a material discharge port, and a plurality of screening holes evenly arranged on the lower half of the side plate of the main barrel; the material distribution box is sleeved on the lower part of the main barrel, and a material distribution cabin is formed between the material distribution box and the crushing barrel, and the material distribution cabin is connected to the plurality of screening holes; a material distribution outlet is provided at the lower end of the material distribution cabin;

[0006] The mixing and crushing assembly includes a feed shaft, spiral cutting blades, and multiple sets of scissor blades; the feed shaft is arranged along the axial direction of the crushing barrel, and the spiral cutting blades are arranged circumferentially of the feed shaft; multiple sets of scissor blades are spaced apart on the upper part of the inner side wall of the main barrel; each set of scissor blades includes two spaced-apart scissor blade bodies, and the spiral cutting blade is accommodated between the two scissor blade bodies;

[0007] The separation barrel comprises an outer shell, an inner barrel and a rotating shaft; the inner barrel is fixedly connected to the rotating shaft and rotatably arranged on the inner side of the outer shell, and a storage space is formed between the inner barrel and the outer shell; the upper end of the inner barrel is connected to the discharge port of the main barrel; a filtering gap is opened on the side plate of the inner barrel, and the filtering gap includes a plurality of first stripping slits gradually expanding outward in a clockwise direction and a plurality of second stripping slits gradually expanding outward in a counterclockwise direction, and the gap of the second stripping slit is larger than the gap of the first stripping slit; the first stripping slit and the second stripping slit are both connected to the storage space; the inner cavity of the inner barrel is connected to a high-temperature steam output pipe or a trichloroethylene output pipe for filling high-temperature steam or trichloroethylene into the inner barrel.

[0008] As another embodiment of the present application, the scissor blade is an inclined arc-shaped plate, and the thickness of the scissor blade gradually increases from front to back along the rotation direction of the spiral cutting blade; the distance between the two scissor blades in the same group gradually decreases from front to back; and the distance between the two scissor blades in the same group is 1.5-2 times the thickness of the spiral cutting blade.

[0009] As another embodiment of the present application, the spiral cutting blade includes a plurality of sub-blades, and the plurality of sub-blades are distributed at intervals along a spiral trajectory in the circumferential direction of the feed shaft.

[0010] As another embodiment of the present application, the inner and outer walls of the scissors blades are provided with a plurality of irregularly distributed annular protrusions; a plurality of irregularly distributed circular protrusions are provided on both sides of the split blade, and the height of the circular protrusions is consistent with the height of the annular protrusions; and there is a gap between the outermost side of the circular protrusion on the split blade and the outermost side of the annular protrusion of the corresponding scissors blade that is smaller than the height of the annular protrusion.

[0011] As another embodiment of the present application, the central angle corresponding to the scissor blade is 45°-60°, and there are multiple scissor blades, which are spaced apart on the inner side wall of the upper half of the main barrel along the rotation trajectory of the spiral cutting blade.

[0012] As another embodiment of the present application, the first stripping seam and the second stripping seam are located at the same height, and the first stripping seam and the second stripping seam are spaced apart.

[0013] As another embodiment of the present application, the first stripping seam is located above the second stripping seam; an asphalt guide plate and a stone guide plate are provided in the storage space, the asphalt guide plate is located between the first stripping seam and the second stripping seam, and extends downward in a spiral shape; the stone guide plate is located below the second stripping seam, and extends downward in a spiral shape.

[0014] As another embodiment of the present application, two rotating bases are arranged in the inner cavity of the inner cylinder along the longitudinal interval, and a sieve hole is provided on the rotating base located above; correspondingly, there are two filtering gaps, and the two filtering gaps are respectively arranged at the upper ends of the two rotating bases, and the asphalt guide plate and the stone guide plate located below the filtering gap are both two-layered; an asphalt flow groove and a stone flow groove are provided on the side wall of the storage space; the asphalt flow groove and the stone flow groove are arranged at intervals; the asphalt flow groove is connected to the upper ends of the two asphalt guide plates; the stone flow groove is connected to the upper ends of the two stone guide plates.

[0015] As another embodiment of the present application, a heating assembly is further provided in the separation barrel, and the heating assembly includes a high-temperature liquid buffer chamber provided at the upper part of the storage space, a spiral coil provided on the inner side of the asphalt guide plate, and a low-temperature liquid buffer chamber provided at the lower part of the storage space, the spiral coil connecting the high-temperature liquid buffer chamber and the low-temperature liquid buffer chamber by means of a longitudinal branch pipe; and the high-temperature liquid buffer chamber and the low-temperature liquid buffer chamber are connected to a heat source by means of a pipeline.

[0016] As another embodiment of the present application, the rotating shaft includes an outer sleeve and an inner rotating shaft, and the inner rotating shaft is a hollow rotating shaft; the fixed end of the outer sleeve is sleeved on the outside of the inner rotating shaft and is interference fit with the inner rotating shaft, the free end of the outer sleeve is in a closed state, and a plurality of injection holes are opened on the side wall of the outer sleeve, and the injection holes are connected to the inner cavity of the inner rotating shaft; the other end of the inner rotating shaft is connected to the conveying pipe by means of the rotating bearing, and is connected to the drive motor through gears. Beneficial effects

[0017] The beneficial effect of the asphalt pavement recycling stone stripping equipment provided by the present invention is that: compared with the existing technology, the asphalt pavement recycling stone stripping equipment of the present invention first separates out a part of small-particle crushed asphalt particles after the "black stone" formed after the old asphalt stone is recycled and crushed through the stirring and crushing assembly in the crushing barrel; then the crushed large-particle black stone is put into the separation barrel, and the asphalt is heated by filling the inner cylinder of the separation barrel with high-temperature steam. The asphalt in the molten state has a certain fluidity, and the fluid asphalt is removed from the first stripping seam with the help of centrifugal force, and then the reverse rotation is used to remove the stone from the second stripping seam, completing the separation of asphalt and stone. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] FIG1 is a schematic structural diagram of an asphalt pavement recycling stone stripping device provided by a first embodiment of the present invention;

[0020] FIG2 is a side view of a scissors blade provided by the first embodiment of the present invention;

[0021] FIG3 is a top view of an asphalt cleaning tank and a gravel cleaning tank provided by the first embodiment of the present invention;

[0022] FIG4 is a schematic structural diagram of a first stripping seam provided in the first embodiment of the present invention;

[0023] FIG5 is a schematic structural diagram of a second stripping seam provided in the first embodiment of the present invention;

[0024] FIG6 is a schematic diagram showing the positional relationship between the first stripping seam and the second stripping seam provided in the second embodiment of the present invention.

[0025] In the figure: 1. Main barrel; 2. Feed shaft; 3. Spiral cutting blade; 4. Dispensing box; 5. Screening hole; 6. Scissor blade; 7. Outer shell; 8. High-temperature liquid buffer chamber; 9. Outer sleeve; 10. Asphalt guide plate; 11. Stone guide plate; 12. Asphalt flow trough; 13. Spiral coil; 14. Low-temperature liquid buffer chamber; 15. First stripping gap; 16. Second stripping gap; 17. Stone flow trough; 18. Rotating base; 19. Auger; 20. Stone cleaning trough; 21. Asphalt cleaning trough; 22. Inner rotating shaft; 23. Annular protrusion; 24. Inner cylinder.

[0026] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. Best Mode for Carrying Out the Invention

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] Please refer to Figures 1 to 6 for an explanation of the asphalt pavement recycling stone stripping equipment provided by the present invention. The asphalt pavement recycling stone stripping equipment includes a crushing barrel, a stirring and crushing assembly, and a separation barrel; the crushing barrel includes a main barrel 1 and a distribution box 4, the main barrel 1 is provided with a feed port, a discharge port, and a plurality of screening holes 5 evenly opened on the lower half of the side plate of the main barrel 1; the distribution box 4 is sleeved on the lower part of the main barrel 1, and a distribution cabin is formed between the distribution box 4 and the crushing barrel, and the distribution cabin is connected to the plurality of screening holes 5; a distribution outlet is provided at the lower end of the distribution cabin; the stirring and crushing assembly includes a feed shaft 2, a spiral cutting blade 3, and a plurality of groups of scissor blades; the feed shaft 2 is arranged along the axial direction of the crushing barrel, and the spiral cutting blade 3 is arranged on the circumference of the feed shaft 2; a plurality of groups of scissor blades are spaced apart at the upper part of the inner side wall of the main barrel 1; each group of scissor blades includes two spaced apart scissor blades 6, two scissor blades 6, and two scissor blades 6 are spaced apart. The spiral cutting blades 3 are accommodated between the blade bodies 6; the separation barrel includes an outer shell 7, an inner barrel 24 and a rotating shaft; the inner barrel 24 is fixedly connected to the rotating shaft and is rotatably arranged on the inner side of the outer shell 7, and a storage space is formed between the inner barrel 24 and the outer shell 7; the upper end of the inner barrel 24 is connected to the discharge port of the main barrel 1; a filtering gap is opened on the side plate of the inner barrel 24, and the filtering gap includes a plurality of first stripping seams 15 gradually expanding outward in a clockwise direction and a plurality of second stripping seams 16 gradually expanding outward in a counterclockwise direction, and the gap of the second stripping seam 16 is larger than the gap of the first stripping seam 15; the first stripping seam 15 and the second stripping seam 16 are both connected to the storage space; the inner cavity of the inner barrel 24 is connected to the high-temperature steam output pipe or the trichloroethylene output pipe for filling the inner barrel 24 with high-temperature steam or trichloroethylene.

[0029] Compared with the prior art, the asphalt pavement recycling stone stripping equipment provided by the present invention is capable of separating a portion of small-sized crushed asphalt particles after the "black stone" formed after the old asphalt stone is recycled and crushed by the stirring and crushing assembly in the crushing barrel; the crushed large-sized black stone is then put into the separation barrel, and the asphalt is heated by filling the inner cylinder 24 of the separation barrel with high-temperature steam. The asphalt in the molten state has a certain fluidity, and the fluid asphalt is removed from the first stripping seam 15 by means of centrifugal force, and then the stone is removed from the second stripping seam 16 by reverse rotation, completing the separation of asphalt and stone, thereby improving the asphalt recovery effect and avoiding the problem of poor recovery effect caused by the high stone content in the asphalt.

[0030] Specifically, the crushing barrel is fixed to the bracket and connected to a vibration motor, which drives the entire crushing barrel to vibrate, so that stones can enter the distribution chamber through the screening holes 5. The distribution box 4 is detachably connected to the main barrel 1. Once connected, the distribution box 4 wraps around the outer side of the main barrel 1 where the screening holes 5 are opened, completely covering all the screening holes 5 at the bottom of the main barrel 1.

[0031] The angle between the axial direction of the crushing barrel and the horizontal direction is 15°-30°. The axial direction of the feed shaft 2 of the mixing and crushing assembly is aligned with the axial direction of the main barrel 1. One end of the feed shaft 2 is rotatably connected to the end plate of the main barrel 1 via a bearing; the other end of the feed shaft 2 extends from the other end plate of the main barrel 1 and is connected to the output terminal of the drive motor.

[0032] A spiral cutting blade 3 is helically mounted on the outer side of the feed shaft 2. The spiral cutting blade 3 conveys the black stone toward the discharge port of the main barrel 1, crushing it during the conveying process. Correspondingly, multiple sets of scissor blades are provided on the upper portion of the main barrel 1, with each set corresponding to a circle of spiral cutting blades 3. Each set of scissor blades includes two symmetrically arranged scissor blades 6, with the corresponding spiral cutting blade 3 passing between the two scissor blades 6. The scissor blades 6 and the spiral cutting blades 3 move relative to each other to cut and crush large clumps of asphalt mastic.

[0033] The small particles formed after cutting are vibrated by the crushing barrel and stirred by the spiral cutting blades 3, leaking through the screening holes 5 and into the separation chamber. The large particles that do not pass through the screening holes 5 are discharged from the discharge port of the main barrel 1 and then enter the inner cylinder 24 of the separation barrel. The aperture range of the screening holes 5 is 13mm.

[0034] Inner drum 24 is connected to the rotating shaft and rotates horizontally under the shaft's drive, forming a storage space between the outer wall of inner drum 24 and the inner wall of outer shell 7. A filtering gap is provided in inner drum 24 for passing asphalt and gravel. The gap of first stripping slit 15 is smaller than the gap of second stripping slit 16. After high-temperature steam is injected into inner drum 24 to heat the asphalt, inner drum 24 is rotated clockwise. Under the action of centrifugal force, the asphalt moves outward until it escapes from first stripping slit 15 into the storage space and is discharged from the storage space. After the asphalt is discharged, inner drum 24 is rotated in the opposite direction, and the gravel rotates through the gap of second stripping slit 16 into the storage space and is discharged from the storage space.

[0035] The separation process includes the following steps: S1. Add crushed black stone into the inner cylinder 24, and then introduce high-temperature steam until the asphalt in the black stone melts; S2. Rotate the inner cylinder 24 clockwise, and the asphalt in the inner cylinder 24 is rotated and separated, and the separated asphalt seeps out into the storage space along the first stripping seam 15; S3. Input trichloroethylene into the inner cylinder 24, and rotate clockwise while inputting trichloroethylene to clean and dissolve the asphalt; S4. The solution containing dissolved asphalt is discharged from the discharge port of the storage space; S5. Rotate the inner cylinder 24 counterclockwise, and the stones in the inner cylinder 24 are rotated and discharged from the second stripping seam 16 to the storage space, and then discharged into the storage space.

[0036] Optionally, the gap width of the first stripping seam 15 is 13 mm, and the gap width of the second stripping seam 16 is 27 mm.

[0037] The scissor blade body 6 is an inclined arc-shaped plate, and the thickness of the scissor blade body 6 gradually increases from front to back along the rotation direction of the spiral cutting blade 3; the spacing between the two scissor blade bodies 6 in the same group gradually decreases from front to back; and the spacing between the two scissor blade bodies 6 in the same group is 1.5-2 times the thickness of the spiral cutting blade 3.

[0038] The scissor blade body 6 is a plate-like structure with an arc-shaped inner and outer sides. The thickness of the scissor blade body 6 gradually increases from front to back to form a wedge shape, and the spacing between the two scissor blade bodies 6 gradually decreases from front to back to form a cutting gap. When the spiral cutting blade 3 passes through the cutting gap while cutting the black stone, the side wall of the spiral cutting blade 3 and the side wall of the scissor blade body 6 are squeezed due to the reduction of the gap, thereby improving the cutting efficiency.

[0039] Specifically, the distance between the front ends of the two scissor blades 6 is twice the thickness of the spiral cutting blade 3 , and the distance between the rear ends of the two scissor blades 6 is 1.5 times the thickness of the spiral cutting blade 3 .

[0040] In addition, the spiral cutting blade 3 includes a plurality of sub-blades, which are spaced apart along a spiral trajectory in the circumferential direction of the feed shaft 2. The plurality of sub-blades are spaced apart along the spiral trajectory of the spiral cutting blade 3. When the sub-blades separate from the scissor blade 6, the black stone material is stirred and accumulated in the cutting gap and the front of the scissor blade 6, facilitating the material to enter the cutting gap.

[0041] In some possible embodiments, please refer to Figure 2, the inner and outer walls of the scissors blades are provided with multiple irregularly distributed annular protrusions 23; multiple irregularly distributed circular protrusions are provided on both sides of the split blade, and the height of the circular protrusions is consistent with the height of the annular protrusions 23; and there is a gap between the outermost side of the circular protrusion on the split blade and the outermost side of the annular protrusion 23 of the corresponding scissors blade that is less than the height of the annular protrusion 23.

[0042] The annular protrusion 23 bulging on the inner side wall of the scissors blade and the circular protrusion on the side wall of the blade rub and squeeze the black stone in the cutting gap, further crushing the black stone and improving its crushing effect.

[0043] Specifically, the outer diameter of the annular protrusion 23 is larger than the outer diameter of the circular protrusion. The height of the circular protrusion is consistent with the height of the annular protrusion 23 and is smaller than the width of the gap between the scissor blade and the split blade.

[0044] In some possible embodiments, the central angle of the scissor blade 6 is 45°-60°, and there are multiple scissor blades 6, which are spaced apart on the inner side wall of the upper half of the main barrel 1 along the rotation trajectory of the spiral cutting blade 3. The multiple scissor blades 6 can increase the number of cuts with the spiral cutting blade 3, thereby improving the cutting effect.

[0045] In some possible embodiments, referring to FIG. 6 , the first stripping seam 15 and the second stripping seam 16 are located at the same height, and the first stripping seam 15 and the second stripping seam 16 are spaced apart.

[0046] The first stripping seam 15 and the second stripping seam 16 are both arranged at the same height, and the difference between them is the inclination direction. The first stripping seam 15 extends in a clockwise direction, and the second stripping seam 16 extends in a counterclockwise direction.

[0047] The separation steps are the same as the above steps, which change the rotation direction of the driving motor in steps S2 and S5, thereby changing the rotation direction of the inner drum 24 and the centrifugal direction of the material, thereby separating the asphalt and gravel.

[0048] Asphalt liquid and granules with a particle size of less than 13mm are considered recyclable asphalt and are recycled as asphalt mixture. Gravel particles with a particle size greater than 13mm and less than 27mm are separated and recycled as aggregate.

[0049] The asphalt dissolved by trichloroethylene can be recovered by heating to evaporate the trichloroethylene.

[0050] In some possible embodiments, referring to Figures 1 and 3 to 5, the first stripping seam 15 is located above the second stripping seam 16; an asphalt guide plate 10 and a stone guide plate 11 are provided in the storage space, and the asphalt guide plate 10 is located between the first stripping seam 15 and the second stripping seam 16, and extends downward in a spiral shape; the stone guide plate 11 is located below the second stripping seam 16, and extends downward in a spiral shape.

[0051] First stripping slit 15 is located above second stripping slit 16. The motor driving the rotating shaft rotates at a higher speed in the forward direction than in the reverse direction. During forward rotation, liquid asphalt is spun out of first stripping slit 15 under the greater centrifugal force. Larger stones, however, are driven by the smaller reverse centrifugal force and moved along the bottom of inner drum 24, or lifted to a lower height, until they are ejected from second stripping slit 16.

[0052] Correspondingly, an asphalt deflector 10 is installed within the storage space to direct asphalt exiting the first stripping slit 15 to the lower portion of the storage space. A stone deflector 11 is used to direct stone from the second stripping slit 16 to the lower portion of the storage space. These two deflectors divide the storage space into two intersecting flow channels, with the two materials on the two deflector plates discharged from different outlets.

[0053] In some possible embodiments, referring to FIG1 , two rotating bases 18 are longitudinally spaced apart within the inner cavity of the inner cylinder 24, with sieve holes formed on the upper rotating base 18. Accordingly, there are two filtration gaps, one at the upper end of each rotating base 18. The asphalt deflector 10 and the stone deflector 11 below the filtration gaps are both double-layered. An asphalt flow groove 12 and a stone flow groove 17 are provided on the sidewalls of the storage space. The asphalt flow groove 12 and the stone flow groove 17 are spaced apart. The asphalt flow groove 12 communicates with the upper ends of the two asphalt deflector plates 10, while the stone flow groove 17 communicates with the upper ends of the two stone deflector plates 11. The asphalt deflector plates 10 are each tilted downward toward the asphalt flow groove 12, and the stone deflector plates 11 are each tilted downward toward the stone flow groove 17.

[0054] There are two rotating bases 18 in the inner cylinder 24, specifically an upper base and a lower base, wherein the upper base is provided with a sieve hole. The aperture of the sieve hole is 19 mm. A filter gap is provided at the upper end of each rotating base 18, and the filter gap includes a first stripping seam 15 and a second stripping seam 16. Asphalt flow grooves 12 and stone flow grooves 17 are provided on the side walls of the storage space for discharging materials to the outside. The asphalt flow grooves 12 are connected to the lowest ends of the two layers of asphalt guide plates 10; the stone flow grooves 17 are connected to the lowest ends of the two layers of stone guide plates 11. And the asphalt flow grooves 12 and the stone flow grooves 17 are arranged at intervals.

[0055] The rotating base 18 is connected to the sidewall of the inner cylinder 24 via bearings. During rotation, the rotating base 18 rotates while the sidewall of the inner cylinder 24 remains stationary. Alternatively, the rotating base 18 can be fixedly connected to the sidewall of the inner cylinder 24, while the inner cylinder 24 is rotatably connected to the outer shell 7 via bearings; the rotating base 18 and the inner cylinder 24 rotate synchronously.

[0056] In order to ensure that the asphalt maintains fluidity, a heating component is provided in the asphalt guide plate 10 and a heating component is also provided on the inner wall of the outer shell 7.

[0057] Specifically, a heating assembly is also provided in the separation barrel, which includes a high-temperature liquid buffer chamber 8 located at the upper part of the storage space, a spiral coil 13 located on the inner side of the asphalt guide plate 10, and a low-temperature liquid buffer chamber 14 located at the lower part of the storage space. The spiral coil 13 connects the high-temperature liquid buffer chamber 8 and the low-temperature liquid buffer chamber 14 via a longitudinal branch pipe; and the high-temperature liquid buffer chamber 8 and the low-temperature liquid buffer chamber 14 are connected to a heat source via a pipeline.

[0058] The asphalt deflector 10 has an inner layer with a spiral coil 13 inside. The spiral coil 13 is used to dissipate heat and provide heat to the asphalt. The spiral coil 13 connects the high-temperature liquid buffer chamber 8 and the low-temperature liquid buffer chamber 14. The fluid used for heating is hot water.

[0059] The high-temperature liquid buffer chamber 8 is connected to the outlet of the heat source, and the low-temperature liquid buffer chamber 14 is connected to the inlet of the heat source. The circulating medium serves as a heat source for heating the asphalt.

[0060] In addition, below the inner cylinder 24, there are two cleaning tanks, specifically an asphalt cleaning tank 21 and a gravel cleaning tank 20. The asphalt cleaning tank 21 is connected to the asphalt flow tank 12, and the gravel cleaning tank 20 is connected to the stone flow tank 17. A screw 19 is provided in both the asphalt cleaning tank 21 and the gravel cleaning tank 20. A discharge pipe is provided at the lower end of each of the asphalt cleaning tanks 21 and the gravel cleaning tank 20, and an opening and closing valve is provided in the discharge pipe. The asphalt in the asphalt cleaning tank 21 is dissolved by triethylene glycol, and after discharge, the triethylene glycol is distilled in a distillation device to obtain asphalt recovery. The gravel is cleaned and discharged, dried and used as aggregate for later use. Optionally, a cleaning pipe is also connected to the inner cylinder 24, which transports a large amount of clean water into the inner cylinder 24 to rinse the separated inner cylinder 24, outer shell 7, gravel, etc. and assist in the discharge of gravel.

[0061] The small-particle asphalt discharged from the material distribution outlet is transported to the asphalt flow tank 12 via the delivery pipe, and after being mixed with the asphalt, flows into the asphalt cleaning tank 21 together.

[0062] In some possible embodiments, please refer to Figure 1, the rotating shaft includes an outer sleeve 9 and an inner rotating shaft 22, and the inner rotating shaft 22 is a hollow rotating shaft; the fixed end of the outer sleeve 9 is sleeved on the outside of the inner rotating shaft 22 and is interference fit with the inner rotating shaft 22, the free end of the outer sleeve 9 is in a closed state, and a plurality of injection holes are opened on the side wall of the outer sleeve 9, and the injection holes are connected to the inner cavity of the inner rotating shaft 22; the other end of the inner rotating shaft 22 is connected to the conveying pipe by means of a rotating bearing, and is connected to the drive motor through a gear.

[0063] The outer sleeve 9 is mounted on the upper end of the inner rotating shaft 22 and is provided with multiple injection holes. These injection holes connect to high-temperature steam, clean water, or trichloroethylene via the hollow inner rotating shaft 22, and valves are used to switch the input of the three fluids. In step S1, the valve is first switched to connect the inner rotating shaft 22 with the high-temperature steam, allowing the high-temperature steam to be ejected from the injection holes. The high-temperature steam is used to melt the asphalt. In step S3, after the asphalt is centrifuged, trichloroethylene is sprayed into the inner cylinder 24 to reduce the asphalt adhering to the walls of the inner cylinder 24 and the rotating base 18. The trichloroethylene dissolves the asphalt while the inner cylinder rotates clockwise. The mixed solution is discharged through the first stripping slit 15 and, along with the asphalt, into the asphalt cleaning tank 21. After step S5, after the stones are discharged, a large amount of clean water is sprayed into the inner cylinder 24. The motor is driven to rotate in the opposite direction, using the clean water to rinse the stones clean, preventing clogging and completing the stone cleaning process.

[0064] The outer sleeve 9 and inner shaft 22 form an interference fit, rotating synchronously. The outer sleeve 9 is connected to the bottom plate of the housing 7 via a bearing. A gear is attached to the end of the outer sleeve 9, which in turn is connected to the drive motor. The inner shaft 22 extends from the lower end of the outer sleeve 9 and is connected to a delivery pipe via a rotating bearing. This pipe is connected to three systems: high-temperature steam, clean water, or trichloroethylene, via a switching valve.

[0065] Optionally, a feed port is provided at the upper end of the separation barrel, the feed port being in communication with the inner cavity of the inner barrel, and an openable cover is provided at the feed port for sealing the separation barrel to prevent the reactants in the inner barrel from contaminating the air.

[0066] In addition, the separation barrel is connected to a negative pressure exhaust device. A negative pressure exhaust pipe extends from the working end of the negative pressure exhaust device, extending into the inner cavity of the separation barrel's inner barrel and the storage space. Negative pressure exhaust pipe openings are provided in both the inner cavity of the separation barrel's inner barrel and the storage space. During operation, the feed port of the inner barrel is sealed. During the reaction, the negative pressure exhaust pipe opening in the storage space is first opened. When the reaction is completed, the negative pressure exhaust pipe openings in the inner cavity of the inner barrel and the storage space are simultaneously opened, and the feed port seal is opened only after the concentration of the gaseous reactants in the inner barrel has decreased.

[0067] Optionally, the cover is in a longitudinally movable state, located inside the separation barrel and raised and lowered longitudinally. When sealing is required, the cover only needs to be moved upward to close the feed inlet. The upper end of the cover can be tapered to prevent material accumulation on top of the cover.

[0068] The asphalt pavement recycled stone stripping equipment provided by the present invention can realize batch operation of materials, starting the next batch after the previous batch of materials is stripped, thereby realizing material transfer and output. At the same time, two parallel stripping machines can be used to achieve uninterrupted stripping, thereby improving production efficiency.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Asphalt pavement recycling stone stripping equipment, characterized by: include: A crushing barrel comprises a main barrel (1) and a material distribution box (4), wherein the main barrel (1) is provided with a material feed port, a material discharge port and a plurality of screening holes (5) uniformly arranged on the lower half of the side plate of the main barrel (1); the material distribution box (4) is sleeved on the lower part of the main barrel (1), and a material distribution cabin is formed between the material distribution box (4) and the crushing barrel, and the material distribution cabin is communicated with the plurality of screening holes (5); a material distribution outlet is provided at the lower end of the material distribution cabin; A mixing and crushing assembly comprises a feed shaft (2), a spiral cutting blade (3) and a plurality of groups of scissor blades; the feed shaft (2) is arranged along the axial direction of the crushing barrel, and the spiral cutting blade (3) is arranged in the circumferential direction of the feed shaft (2); the plurality of groups of scissor blades are arranged at intervals on the upper part of the inner side wall of the main barrel (1); each group of scissor blades comprises two scissor blade bodies (6) arranged at intervals, and the spiral cutting blade (3) is accommodated between the two scissor blade bodies (6); A separation barrel comprises an outer shell (7), an inner barrel (24) and a rotating shaft; the inner barrel (24) is fixedly connected to the rotating shaft and is rotatably arranged on the inner side of the outer shell (7), and a storage space is formed between the inner barrel (24) and the outer shell (7); the upper end of the inner barrel (24) is connected to the discharge port of the main barrel (1); a filtering gap is opened on the side plate of the inner barrel (24), and the filtering gap includes a plurality of first stripping slits (15) gradually expanding outward in a clockwise direction and a plurality of second stripping slits (16) gradually expanding outward in a counterclockwise direction, and the gap of the second stripping slit (16) is larger than the gap of the first stripping slit (15); the first stripping slit (15) and the second stripping slit (16) are both connected to the storage space; the inner cavity of the inner barrel (24) is connected to a high-temperature steam output pipe or a trichloroethylene output pipe for filling high-temperature steam or trichloroethylene into the inner barrel (24).

2. The asphalt pavement recycling stone stripping equipment according to claim 1, characterized in that: The scissor blade body (6) is an inclined arc-shaped plate, and the thickness of the scissor blade body (6) gradually increases from front to back along the rotation direction of the spiral cutting blade (3); the distance between the two scissor blade bodies (6) in the same group gradually decreases from front to back; and the distance between the two scissor blade bodies (6) in the same group is 1.5-2 times the thickness of the spiral cutting blade (3).

3. The asphalt pavement recycling stone stripping equipment according to claim 2, characterized in that: The spiral cutting blade (3) comprises a plurality of sub-blades, and the plurality of sub-blades are distributed at intervals along a spiral track in the circumferential direction of the feeding shaft (2).

4. The asphalt pavement recycling stone stripping equipment according to claim 3, characterized in that: The inner and outer walls of the scissor blades are both provided with a plurality of irregularly distributed annular protrusions (23); both sides of the split blades are provided with a plurality of irregularly distributed circular protrusions, the height of the circular protrusions being consistent with the height of the annular protrusions (23); and a gap smaller than the height of the annular protrusions (23) exists between the outermost side of the circular protrusion on the split blade and the outermost side of the annular protrusion (23) of the corresponding scissor blade.

5. The asphalt pavement recycling stone stripping equipment according to claim 1, characterized in that: The central angle corresponding to the scissor blade body (6) is 45°-60°, and there are multiple scissor blade bodies (6). The multiple scissor blade bodies (6) are distributed at intervals on the inner side wall of the upper half of the main body barrel (1) along the rotation trajectory of the spiral cutting blade (3).

6. The asphalt pavement recycling stone stripping equipment according to claim 1, characterized in that: The first stripping seam (15) and the second stripping seam (16) are located at the same height, and the first stripping seam (15) and the second stripping seam (16) are spaced apart.

7. The asphalt pavement recycling stone stripping equipment according to claim 1, characterized in that: The first stripping seam (15) is located above the second stripping seam (16); an asphalt guide plate (10) and a stone guide plate (11) are provided in the storage space, the asphalt guide plate (10) is located between the first stripping seam (15) and the second stripping seam (16), and extends downward in a spiral shape; the stone guide plate (11) is located below the second stripping seam (16), and extends downward in a spiral shape.

8. The asphalt pavement recycling stone stripping device according to claim 7, characterized in that: Two rotating bases are arranged in the inner cavity of the inner cylinder (24) at intervals along the longitudinal direction, and a sieve hole is provided on the rotating base located above; correspondingly, there are two filtering gaps, and the two filtering gaps are respectively arranged at the upper ends of the two rotating bases, and the asphalt guide plate (10) and the stone guide plate (11) located below the filtering gap are both two-layered; an asphalt flow groove (12) and a stone flow groove (17) are provided on the side wall of the storage space; the asphalt flow groove (12) and the stone flow groove (17) are arranged at intervals; the asphalt flow groove (12) is connected to the upper ends of the two asphalt guide plates (10); the stone flow groove (17) is connected to the upper ends of the two stone guide plates (11).

9. The asphalt pavement recycling stone stripping device according to claim 8, characterized in that: A heating assembly is further provided in the separation barrel, the heating assembly comprising a high-temperature liquid buffer chamber (8) provided at the upper portion of the storage space, a spiral coil (13) provided on the inner side of the asphalt guide plate (10), and a low-temperature liquid buffer chamber (14) provided at the lower portion of the storage space, the spiral coil (13) communicating with the high-temperature liquid buffer chamber (8) and the low-temperature liquid buffer chamber (14) via a longitudinal branch pipe; and the high-temperature liquid buffer chamber (8) and the low-temperature liquid buffer chamber (14) are connected to a heat source via a pipeline.

10. The asphalt pavement recycling stone stripping device according to claim 1, characterized in that: The rotating shaft comprises an outer shaft sleeve (9) and an inner shaft (22), wherein the inner shaft (22) is a hollow shaft; the fixed end of the outer shaft sleeve (9) is sleeved on the outer side of the inner shaft (22) and is interference-fitted with the inner shaft (22); the free end of the outer shaft sleeve (9) is in a closed state; a plurality of injection holes are provided on the side wall of the outer shaft sleeve (9), and the injection holes are communicated with the inner cavity of the inner shaft (22); the other end of the inner shaft (22) is connected to the delivery pipe by means of the rotating bearing, and is connected to the drive motor through a gear.

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