CN111715339B

CN111715339B - Waste asphalt regeneration equipment

Info

Publication number: CN111715339B
Application number: CN202010611455.2A
Authority: CN
Inventors: 宋俊阳
Original assignee: Haixing Jiexing New Building Materials Co ltd
Current assignee: Haixing Jiexing new building materials Co.,Ltd.
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2022-02-01
Anticipated expiration: 2040-06-30
Also published as: CN111715339A

Abstract

The invention discloses waste asphalt regeneration equipment which comprises a shell, a primary filtering device, a screening cylinder, a rotary cylinder, a screening device, a discharge hole, a grinding device and a feeding channel, wherein the primary filtering device is arranged on the shell; the grinding device comprises a bell mouth, a feed inlet, a first grinding disc, a second grinding disc, an extrusion device, a first motor, a rotating device and a material spreading port water supply device; according to the invention, the waste asphalt is firstly crushed and the silt is filtered through the primary filtering device, so that the screening effect is improved; then the waste asphalt is further crushed through the relative rotation of the first grinding disc and the second grinding disc, the ground waste asphalt is screened through a screening device, the ground waste asphalt enters the next procedure, and the waste asphalt with larger block heads is sent into the grinding discs for secondary grinding; the crushing effect to old and useless pitch has been improved through setting up of first abrasive disc and second abrasive disc, combines screening plant's effect to improve crushing efficiency.

Description

Waste asphalt regeneration equipment

Technical Field

The invention belongs to the technical field of waste asphalt treatment, and particularly relates to waste asphalt regeneration equipment.

Background

At present, waste asphalt is recycled when being treated, the waste asphalt is crushed and screened, and then new asphalt, aggregate and regenerant are added and stirred; in the prior art, when waste asphalt is crushed, a crusher is selected to crush the collected asphalt, then large blocks of waste asphalt are collected again to prepare for secondary crushing, the required purpose is achieved, and the aggregate is easily damaged by crushing with the crusher, so that the asphalt quality is influenced; consuming time when carrying out the regrinding, influenced work efficiency.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides waste asphalt regeneration equipment which comprises a shell, a primary filtering device arranged in the shell, a screening cylinder arranged below the shell, a rotating cylinder arranged in the screening cylinder, a screening device arranged on the rotating cylinder, a discharge hole arranged below the rotating cylinder, a grinding device arranged in the rotating cylinder and a feeding channel arranged on the screening cylinder; the method is characterized in that: the grinding device comprises a bell mouth arranged in the feeding channel, a feeding hole arranged on the feeding channel, a first grinding disc arranged in the rotary cylinder, a second grinding disc arranged below the first grinding disc, an extrusion device arranged on the second grinding disc, a first motor arranged below the second grinding disc, a rotating device arranged on the second grinding disc, a material scattering port arranged on the feeding channel and a water supply device arranged below the second grinding disc; the bell mouth is connected with the feeding channel and the first grinding disc; the feed inlet is positioned above the bell mouth; the longitudinal section of the first grinding disc is inverted V-shaped and can be rotatably embedded on the inner wall of the feeding channel; the longitudinal section of the second grinding disc is inverted V-shaped, the second grinding disc is rotatably embedded on the inner wall of the feeding channel, the longitudinal section of a gap between the second grinding disc and the first grinding disc is V-shaped, and the large opening points to the bell mouth; the four groups of extrusion devices can be arranged on the second grinding disc in a vertically moving manner; the material scattering port is in butt joint with the gaps of the first grinding disc and the second grinding disc.

When the equipment is started, the collected waste asphalt is placed in a primary filtering device; further waste asphalt is beaten into small pieces in the device, and sandy soil on the asphalt is sieved; then, the small asphalt blocks fall into the feeding channel and slowly accumulate in the bell mouth; further turning on the first motor, and then the second grinding disc starts to rotate; at the moment, the water supply device sprays water mist on the asphalt and stirs the asphalt; then the asphalt enters a gap between the first grinding disc and the second grinding disc, and the asphalt is ground in the first grinding disc and the second grinding disc along with the rotation of the second grinding disc; further driving the extruding device to move upwards to stir the asphalt when the second grinding disc rotates; at the moment, the rotating device drives the first grinding disc and the second grinding disc to rotate relatively along with the rotation of the second grinding disc; further grinding the asphalt, then screening the crushed asphalt in a screening device through a material spreading port, and conveying the asphalt with larger block heads into the grinding device again for secondary grinding; the waste asphalt which is just collected is primarily beaten into small blocks and sandy soil on the asphalt is filtered through the primary filtering device, so that the regenerated asphalt is cleaned of sandy soil impurities, and the quality of the asphalt is improved; the ground asphalt is sorted by the screening device, and the asphalt with large particles is conveyed to the bell mouth again to be ground again, so that the grinding effect is improved; the grinding device is arranged to crush the asphalt through friction, so that the aggregate is prevented from being damaged, and the quality of the asphalt is improved; the temporary collection of the asphalt is realized through the arrangement of the bell mouth, the asphalt is prevented from blocking a gap between the first grinding disc and the second grinding disc, and the grinding effect is improved; the arrangement of the first grinding disc and the second grinding disc realizes the grinding and crushing of the asphalt, so that the asphalt crushing effect is improved on one hand, and the damage to aggregate is avoided on the other hand; the stirring of the asphalt during grinding is realized through the arrangement of the extruding device, so that the asphalt is prevented from being blocked in gaps between the first grinding disc and the second grinding disc, and the grinding effect is improved; the intermittent relative rotation of the first grinding disc and the second grinding disc is realized through the arrangement of the rotating device, so that the grinding effect is improved; through the setting of water supply installation, the cooling to pitch prevents on the one hand that pitch from melting, and pitch bonding on the other hand prevents when grinding on first abrasive disc and the second abrasive disc.

The rotating device comprises a first spring arranged on the first grinding disc, a rack arranged on the first grinding disc, a gear arranged on the inner wall of the feeding channel and telescopic teeth arranged on the first grinding disc; the first spring is connected with the first grinding disc and the feeding channel; the gear is rotatably embedded on the inner wall of the feeding channel and can be meshed with the rack and the telescopic teeth respectively.

When the second motor drives the second grinding disc to start rotating, the telescopic teeth are driven to move simultaneously; then when the telescopic teeth are meshed with the gear, the gear is driven to rotate, and the gear further drives the rack to move; at the moment, the first grinding disc starts to rotate, and further after the gear is separated from the rack, the first spring starts to act, and the first grinding disc rotates and resets; the device realizes the intermittent rotation of the first grinding disc, and improves the grinding effect on the asphalt; meanwhile, the first grinding disc continuously rotates clockwise and anticlockwise to rub the asphalt, so that the crushing effect is further improved; and meanwhile, the asphalt is stirred, so that the asphalt blockage is avoided.

The telescopic teeth comprise a plurality of inclined blocks arranged on the second grinding disc, teeth arranged on the inclined blocks and second springs arranged on the inclined blocks; the inclined block can be embedded on the side edge of the second grinding disc in a vertically moving mode, and one end of the inclined block is an inclined plane; the teeth are uniformly distributed on the upper end surface of the inclined block; the second spring is connected with the inclined block and the feeding channel.

When the second grinding disc starts to move, the plurality of inclined blocks are driven to move together; when the inclined block moves to the lower part of the gear, under the action of the second spring, teeth on the inclined block are meshed with the gear, and the gear can be further driven to start rotating; the mechanism realizes the stretching of the inclined block on the one hand, so that the teeth can better adapt to equipment, and further engage with the gear, thereby improving the stability of the equipment.

The extruding device comprises an extruding groove formed in the second grinding disc, an extruding block arranged on the second grinding disc, a third spring arranged on the extruding block, an expansion link arranged at the bottom of the feeding channel, a fourth spring arranged in the expansion link and an expansion ball arranged on the fourth spring; the extrusion groove is arranged along the circumferential direction of the second grinding disc; the extrusion block can be embedded on the second grinding disc in a vertically moving mode, and the extrusion block can abut against the first grinding disc and is connected with the extrusion block and the second grinding disc through the third spring; one end of the telescopic rod is fixedly arranged at the bottom of the feeding channel, and the other end of the telescopic rod points to the second grinding disc; the telescopic ball is movably embedded on the telescopic rod and can be abutted against the second grinding disc; the fourth spring is connected with the telescopic rod and the telescopic ball.

When the second grinding disc starts to rotate, the asphalt blocks rub against each other in the extrusion groove, and slowly change from large blocks into small blocks; at the moment, the telescopic ball moves close to the second grinding disc; when the telescopic ball abuts against the extrusion block, the telescopic ball pushes the telescopic block upwards under the action of a fourth spring; the telescopic block is moved upwards to extrude the asphalt block; the asphalt blocks are extruded through the mechanism, so that the asphalt blocks can rub against each other to improve the grinding effect; on the other hand, the asphalt block is stirred, so that the grinding effect of the asphalt block is improved.

The water supply device comprises a water tank arranged in the rotary cylinder, a water pipe arranged on the first motor and a spray head arranged on the water pipe; the longitudinal section of the water pipe is arc-shaped, one end of the water pipe is connected with the water tank, and the other end of the water pipe is arranged on the first grinding disc in a rotatable embedded mode; the spray head is arranged on the second grinding disc.

When the asphalt blocks fall to the bell mouth, the water pipe begins to fill water; at the moment, the spray head begins to atomize water, namely spraying water by the asphalt blocks; when the second grinding disc starts to rotate, the water pipe is driven to rotate, and the asphalt blocks at the bell mouth are stirred by the further water pipe; the arrangement of the water pipe realizes the stirring of the asphalt blocks, and prevents the asphalt blocks from being accumulated in the bell mouth to cause blockage and influence on the grinding effect; realized spraying water smoke to the pitch piece through the shower nozzle, improve the moist of pitch, on the one hand to the cooling of pitch piece, pitch glues on first abrasive disc and second abrasive disc when on the other hand prevents to grind, improves and grinds the effect.

The screening device comprises a second motor arranged below the rotary cylinder, a spiral plate arranged on the rotary cylinder, a first screening hole arranged on the spiral plate and a baffle mechanism arranged on the spiral plate; the first screening holes are provided with a plurality of holes which are uniformly arranged on the surface of the spiral plate.

When the ground asphalt block is scattered on the spiral plate, starting a second motor; the further rotary cylinder starts to rotate and drives the spiral plate to start to rotate at the same time; then, screening the asphalt blocks scattered on the spiral plate, wherein the qualified ground asphalt blocks fall to the bottom of the rotary cylinder through the first screening holes, and the asphalt blocks with larger particles are blocked on the spiral plate through the blocking piece mechanism; then, the spiral plate is conveyed into the bell mouth along with the rotation of the spiral plate, and secondary grinding is carried out; the arrangement of the spiral plate realizes the transmission of the ground asphalt blocks on one hand, and the vibration is generated by the gravity of the asphalt blocks in the transmission process on the other hand, so that the screening effect is improved; due to the spiral structure of the spiral plate, the screening effect is further improved.

The baffle mechanism comprises an arc sheet arranged on the spiral plate, a second screening hole formed in the arc sheet, a fifth spring arranged on the arc sheet and a vibration roller arranged on the inner wall of the screening cylinder; the cross section of the arc sheet is arc-shaped, the arc sheet can be embedded on the spiral plate in a left-right moving mode, and the arc sheet can abut against the vibration roller; the fifth spring is connected with the arc sheet and the rotary cylinder; the vibration rollers are arranged in a plurality of positions and are uniformly arranged along the circumferential direction of the screening cylinder.

When the asphalt blocks are screened on the spiral plate, the asphalt blocks are firstly blocked by the arc sheets; the further arc sheet is abutted against the vibrating stick, and then under the action of the fifth spring, the arc sheet starts to vibrate; vibrating the asphalt on the arc sheet, and enabling further asphalt blocks to fall from the second screening holes, and the asphalt blocks and the large asphalt blocks are blocked by the arc sheet and rotate along with the spiral plate; the asphalt block is conveyed into the bell mouth; the blocking of the asphalt blocks is realized through the component arrangement of the mechanism, so that the massive asphalt is directly conveyed into the bell mouth for secondary grinding, and the efficiency of the equipment is improved.

The primary filtering device comprises a crushing box arranged on the shell, a rotating roller arranged in the crushing box, a fixed rod arranged on the rotating roller, a conveying belt arranged below the crushing box, a filtering hole arranged on the conveying belt and a third motor arranged outside the crushing box; the rotating roller is rotatably embedded in the crushing box and is connected with a third motor; the fixed rods are arranged in a plurality and are fixedly arranged on the surface of the rotating roller in a staggered manner.

When the equipment is started, firstly, the collected asphalt blocks are placed into a crushing box; then starting a third motor, starting a further rotating roller to rotate, and simultaneously starting striking the asphalt blocks by a fixed rod; so that the asphalt blocks are broken into pieces; simultaneously, the sandy soil on the asphalt blocks is knocked down along with the impact generated by beating; further asphalt blocks fall onto the conveyor belt, the knocked-down sandy soil is filtered through the filtering holes, and the residual asphalt blocks fall into the bell mouth; the striking of the asphalt blocks is realized through the arrangement of the fixed rollers, the crushing of a crusher is replaced, on one hand, the large asphalt blocks are crushed, and the damage of aggregate is avoided; on the other hand, the sand impurities are knocked down, so that the quality of the asphalt block is improved

In conclusion, the invention has the following advantages: the equipment firstly strikes the collected asphalt blocks through the rotation of the fixed roller to crush the asphalt blocks, and the sand and soil impurities on the asphalt blocks fall off in a striking mode, so that aggregates cannot be further damaged; then, the equipment starts to grind and crush the asphalt blocks through the matching of the first grinding disc and the second grinding disc; the asphalt blocks are reduced by friction, so that the damage of aggregates is avoided; then, the size uniformity of the crushed asphalt blocks is improved and the crushing effect is improved through the fit clearance between the first grinding disc and the second grinding disc; water mist is sprayed during crushing, so that asphalt blocks cannot be stuck to a grinding disc during grinding; then the equipment realizes the conveying of the asphalt blocks and simultaneously screens the asphalt blocks through the arrangement of the spiral plate, thereby improving the working effect; the invention has compact structure, saves occupied space, simultaneously performs screening and crushing, and improves the efficiency of the equipment for treating the waste asphalt.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a left side view of the present invention.

Fig. 3 is a cross-sectional perspective view along a-a of fig. 2 of the present invention.

Fig. 4 is a cross-sectional view taken along B-B of fig. 2 of the present invention.

Fig. 5 is a partial cross-sectional view of the polishing apparatus of the present invention.

Fig. 6 is a partial view of the invention at D in fig. 5.

Fig. 7 is a partial view of the invention at G in fig. 3.

Fig. 8 is an exploded view of the telescoping pole of the present invention.

Fig. 9 is a partial view at C of fig. 4 of the present invention.

Fig. 10 is a partial view of the invention at E of fig. 5.

Fig. 11 is a partial cross-sectional view at F of fig. 4 of the present invention.

FIG. 12 is a partial view taken at A of FIG. 3 in accordance with the present invention.

Fig. 13 is a partial cross-sectional view at B in fig. 4 of the present invention.

Detailed Description

As shown in fig. 1-13, a waste asphalt recycling device comprises a housing 1, a primary filtering device 2, a screening cylinder 3, a rotary cylinder 4, a screening device 5, a discharge port 6, a grinding device 6, and a feed channel 7; the grinding device 6 comprises a bell mouth 61, a feed inlet 62, a first grinding disc 63, a second grinding disc 64, an extrusion device 65, a first motor 66, a rotating device 67, a material spreading port 68 and a water supply device 69; the primary filtering device 2 is arranged inside the shell 1; the screening cylinder 3 is arranged below the shell 1; the rotary drum 4 is rotatably embedded in the screening drum 3; the screening device 5 is arranged in the rotary cylinder 4; the discharge port 6 is arranged below the rotary cylinder 4 and is positioned at the bottom; the grinding device 6 is arranged in the rotary cylinder 4; the feeding channel 7 is connected with the rotary drum 4 and the filtering device 2; the bell mouth 61 connects the feed channel 7 and the first grinding disc 63; the feed inlet 62 is formed in the feed channel 7 and is positioned above the bell mouth 61; the longitudinal section of the first grinding 63 disc is inverted V-shaped and can be rotatably embedded on the inner wall of the feeding channel 7; the longitudinal section of the second grinding disc 64 is inverted V-shaped, the second grinding disc is rotatably embedded on the inner wall of the feeding channel 7, the longitudinal section of a gap between the second grinding disc and the first grinding disc 63 is V-shaped, and the large opening points to the bell mouth 61; the extrusion devices 65 are 4 groups and can be arranged on the second grinding disc 64 in an up-and-down moving manner; the first motor 66 is arranged below the second grinding disc 64, and the first motor 66 is directly purchased from the market; the rotating device 67 is arranged on the second grinding disc 64; the material spreading port 68 is arranged in the feeding channel 7 and is in butt joint with the gaps of the first grinding disc 63 and the second grinding disc 64; the water supply device 69 is disposed below the second polishing disk 64.

As shown in fig. 5 to 7, the rotating device 67 includes a first spring 671, a rack 672, a gear 673, and telescopic teeth 10; the first spring 671 connects the first grinding disk 63 and the feed channel 7; the rack 672 is arranged on the first grinding disc 63; the gear 673 is rotatably embedded on the inner wall of the feeding channel 7 and can be respectively meshed with the rack 672 and the telescopic teeth 10; the retractable teeth 10 are provided on the second grinding disk 64.

As shown in fig. 7-8, the retractable tooth 10 comprises a sloping block 101, a tooth 102, and a second spring 103; the inclined block 101 can be embedded at the side edge of the second grinding disc 64 in a way of moving up and down, and one end of the inclined block 101 is an inclined plane 104; the teeth 102 are uniformly distributed on the upper end surface of the inclined block 101; the second spring 103 connects the swash block 101 and the feed channel 7.

As shown in fig. 4, 7 and 11, the pressing device 65 includes a pressing groove 651, a pressing block 652, a third spring 653, a telescopic rod 654, a fourth spring 655, and a telescopic ball 656; the pressing groove 651 is provided on the surface of the second grinding disk 64 in the circumferential direction of the second grinding disk 64; the extrusion block 652 can be embedded on the second grinding disc 64 in a way of moving up and down, and the extrusion block 652 can be abutted against the first grinding disc 63; the third spring 653 connects the pressing block 652 and the second grinding disk 64; one end of the telescopic rod 654 is fixedly arranged at the bottom of the feeding channel 7, and the other end of the telescopic rod points to the second grinding disc 64; the telescopic ball 656 is movably embedded on the telescopic rod 654, and the telescopic ball 656 can be abutted against the second grinding disk 64; the fourth spring 655 connects the telescoping rod 654 and the telescoping ball 656.

As shown in fig. 3 and 10, the water supply device 69 includes a water tank 691, a water pipe 692, and a spray head 693; the water tank 691 is arranged in the rotary drum 4; the longitudinal section of the water pipe 692 is arc-shaped, one end of the water pipe 692 is connected with the water tank 691, and the other end of the water pipe 692 is arranged on the rotatable embedded first grinding disc 63; the spray nozzle 693 is a water mist spray, and the spray nozzle 693 is directed to the surface of the second grinding disk 64.

As shown in fig. 2-3, the screening device 5 includes a second motor 51, a spiral plate 52, a first screening hole 53, and a baffle mechanism 54; the second motor 51 is arranged below the rotary drum 4; the spiral plate 52 is arranged on the surface of the rotary cylinder 4; the first sieving holes 53 are provided with a plurality of holes which are uniformly arranged on the surface of the spiral plate 52; the baffle plate mechanisms 54 are provided with a plurality of groups which are uniformly distributed on the surface of the spiral plate.

As shown in fig. 3 and 12-13, the blocking mechanism 54 includes an arc piece 541, a second sieving hole 542, a fifth spring 543, and a vibration roller 544; the cross section of the arc piece 541 is arc-shaped, and the arc piece 541 can be embedded on the spiral plate 52 in a left-right moving manner, and can be abutted against the vibration roller 544; the second screening holes 542 are formed in the arc piece 541; the fifth spring 543 connects the arc piece 541 and the rotary cylinder 4; the cross section of the vibration roller 544 is semicircular, and a plurality of vibration rollers are uniformly arranged along the circumferential direction of the screening drum 3.

As shown in fig. 1 to 3, the primary filter device 2 includes a pulverizing box 21, a rotating roller 22, a fixed bar 23, a conveyor belt 24, a filter hole 25, a third motor 26; the crushing box 21 is arranged on the shell 1; the rotating roller 22 is rotatably embedded in the crushing box 21 and is connected with a third motor 26; a plurality of fixed rods 23 are arranged and fixedly arranged on the surface of the rotating roller 22 in a staggered manner; the conveyor belt 24 is arranged below the crushing box 21; the filter holes 25 are formed in the conveyor belt 24; the third motor 26 is provided in the crushing box 21, and the third motor 26 is directly available in the market.

The specific working process is as follows: when the equipment is started, firstly, the collected asphalt blocks are placed into a crushing box 21; then the third motor 26 is activated and the further rotating roller 22 starts to rotate, while the fixed bar 23 starts to hit the block of asphalt; so that the asphalt blocks are broken into pieces; simultaneously, the sandy soil on the asphalt blocks is knocked down along with the impact generated by beating; further asphalt blocks fall onto the conveyor belt 24, the knocked-down sandy soil is filtered through the filtering holes 25, and the residual asphalt blocks fall into the bell mouth 61; when the asphalt block falls to the bell mouth 61, the water pipe 692 starts to fill with water; at this time, the spray head 693 begins to atomize water and spray water to the asphalt block; further, the first motor 66 is started to drive the second grinding disc 64 to rotate; when the second grinding disc 64 starts to rotate, the water pipe 692 starts to rotate, and the further water pipe 692 starts to stir the asphalt block at the bell mouth 61; when the second grinding disk 64 starts to rotate, the asphalt lumps rub against each other in the pressing groove 651, slowly changing from large lumps to small lumps; at this time, the expansion ball 656 moves close to the second grinding disk 64; further, when the telescopic ball 656 abuts against the pressing block 652, the telescopic ball 656 pushes the pressing block 652 upwards under the action of the fourth spring 655; moving the extrusion blocks 652 upward, extruding the asphalt blocks; at the moment, the second grinding disc 64 drives the plurality of inclined blocks 101 to move together; when the sloping block 101 moves below the gear 673, under the action of the second spring 103, the teeth 102 on the sloping block 101 are engaged with the gear 673, and further, the gear 673 can be driven to rotate; the further gear 673 starts to drive the rack 672 to move; at this time, the first grinding disk 63 starts to rotate, and further, after the gear 672 is disengaged from the rack 672, the first spring 671 starts to act, and the first grinding disk 63 rotates and resets; intermittent rotation of the first abrasive disk 63; at this time, the asphalt blocks are ground and crushed under the relative rotation of the first grinding disc 63 and the second grinding disc 64; when the ground asphalt block is scattered on the spiral plate 52, the second motor 51 is started; the further rotary drum 4 starts to rotate, and simultaneously drives the spiral plate 52 to start to rotate; then, screening the asphalt blocks scattered on the spiral plate 52, and dropping the qualified ground asphalt blocks to the bottom of the rotary cylinder 4 through the first screening holes 53; the asphalt blocks with large particles are blocked by the arc sheets 541; the further arc piece 541 abuts against the vibrating stick 544, and then the arc piece 541 starts to vibrate under the action of the fifth spring 543; vibrating the asphalt on the arc piece 541, and enabling further asphalt blocks to fall from the second screening holes 542, wherein the asphalt blocks and large asphalt blocks are blocked by the arc piece 541 and rotate along with the spiral plate 52; the asphalt mass is transferred into the bell 61 and ground again.

While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A waste asphalt regeneration device comprises a shell (1), a primary filtering device (2) arranged in the shell (1), a screening cylinder (3) arranged below the shell (1), a rotary cylinder (4) arranged in the screening cylinder (3), a screening device (5) arranged on the rotary cylinder (4), a discharge hole arranged below the rotary cylinder (4), a feeding channel (7) arranged on the screening cylinder (3) and a grinding device (6) arranged in the feeding channel (7); the method is characterized in that: the grinding device (6) comprises a bell mouth (61) arranged in the feeding channel (7), a feeding hole (62) arranged on the feeding channel (7), a first grinding disc (63), a second grinding disc (64) arranged below the first grinding disc (63), an extruding device (65) arranged on the second grinding disc (64), a first motor (66) arranged below the second grinding disc (64), a rotating device (67) arranged on the second grinding disc (64), a material spreading port (68) arranged on the feeding channel (7) and a water supply device (69) arranged below the second grinding disc (64); the bell mouth (61) is connected with the feeding channel (7) and the first grinding disc (63); the feed port (62) is positioned above the bell mouth (61); the longitudinal section of the first grinding disc (63) is inverted V-shaped and is rotatably embedded on the inner wall of the feeding channel (7); the longitudinal section of the second grinding disc (64) is inverted V-shaped, the second grinding disc is rotatably embedded on the inner wall of the feeding channel (7), the longitudinal section of a gap between the second grinding disc and the first grinding disc (63) is V-shaped, and the large opening points to a bell mouth; the four groups of extrusion devices (65) are arranged on the second grinding disc (64) and can move up and down; the material spreading opening (68) is in butt joint with the gap between the first grinding disc (63) and the second grinding disc (64).

2. The waste asphalt recycling plant according to claim 1, characterized in that: the rotating device (67) comprises a first spring (671) arranged on the first grinding disc (63), a rack (672) arranged on the first grinding disc (63), a gear (673) arranged on the inner wall of the feeding channel (7) and a telescopic tooth (10) arranged on the second grinding disc (64); the first spring (671) connecting the first grinding disk (63) and the feed channel (7); the gear (673) is rotatably embedded on the inner wall of the feeding channel (7) and can be respectively meshed with the rack (672) and the telescopic teeth (10).

3. The waste asphalt recycling plant according to claim 2, characterized in that: the telescopic teeth (10) comprise a plurality of inclined blocks (101) arranged on the second grinding disc (64), teeth (102) arranged on the inclined blocks (101), and second springs (103) arranged on the inclined blocks (101); the inclined block (101) can be embedded in the side edge of the second grinding disc (64) in a vertically moving mode, and one end of the inclined block (101) is an inclined surface; the teeth are uniformly distributed on the upper end surface of the inclined block (101); the second spring (103) connects the swash block (101) and the second grinding disk (64).

4. The waste asphalt recycling plant according to claim 1, characterized in that: the extruding device (65) comprises an extruding groove (651) formed in the second grinding disc (64), an extruding block (652) arranged on the second grinding disc (64), a third spring (653) arranged on the extruding block (652), an expansion rod (654) arranged at the bottom of the feeding channel (7), a fourth spring (655) arranged in the expansion rod (654), and an expansion ball (656) arranged on the fourth spring (655); the extrusion groove is arranged along the circumferential direction of the second grinding disc (64); the extrusion block (652) can be embedded on the second grinding disc (64) in a vertically moving mode, the extrusion block (652) can be abutted against the first grinding disc (63), and the third spring (653) is connected with the extrusion block (652) and the second grinding disc (64); one end of the telescopic rod (654) is fixedly arranged at the bottom of the feeding channel (7), and the other end of the telescopic rod points to the second grinding disc (64); the telescopic ball (656) is movably embedded on the telescopic rod (654), and the telescopic ball (656) can be abutted against the second grinding disc (64); the fourth spring (655) is connected with the telescopic rod (654) and the telescopic ball (656).

5. The waste asphalt recycling plant according to claim 1, characterized in that: the water supply device (69) comprises a water tank (691) arranged in the rotary cylinder (4), a water pipe (692) arranged on the first motor (66) and a spray head (693) arranged on the water pipe (692); the longitudinal section of the water pipe (692) is arc-shaped, one end of the water pipe is connected with the water tank (691), and the other end of the water pipe is rotatably embedded on the first grinding disc (63); the spray head (693) is directed towards the second grinding disk (64).

6. The waste asphalt recycling plant according to claim 1, characterized in that: the screening device (5) comprises a second motor (51) arranged below the rotary cylinder (4), a spiral plate (52) arranged on the rotary cylinder (4), a first screening hole (53) arranged on the spiral plate (52), and a blocking piece mechanism (54) arranged on the spiral plate (52); the first screening holes (53) are provided with a plurality of holes which are uniformly arranged on the surface of the spiral plate (52).

7. The waste asphalt recycling equipment according to claim 6, characterized in that the baffle mechanism (54) comprises an arc piece (541) arranged on the spiral plate (52), a second screening hole (542) arranged on the arc piece (541), a fifth spring (543) arranged on the arc piece (541), and a vibration roller (544) arranged on the inner wall of the screening drum (3); the cross section of the arc piece (541) is arc-shaped, the arc piece can be embedded on the spiral plate (52) in a left-right moving mode, and the arc piece (541) can abut against the vibration roller (544); the fifth spring (543) is connected with the arc piece (541) and the rotary cylinder (4); the vibration rollers (544) are arranged in a plurality and are uniformly arranged along the circumferential direction of the screening cylinder (3).

8. The waste asphalt recycling plant according to claim 1, characterized in that: the primary filtering device (2) comprises a crushing box (21) arranged on the shell (1), a rotating roller (22) arranged in the crushing box (21), a fixed rod (23) arranged on the rotating roller (22), a conveying belt (24) arranged below the crushing box (21), a filtering hole (25) arranged on the conveying belt (24), and a third motor (26) arranged outside the crushing box (21); the rotating roller (22) is rotatably embedded in the crushing box (21) and is connected with a third motor (26); the fixed rods (23) are arranged in a plurality and are fixedly arranged on the surface of the rotating roller (22) in a disorderly manner.