CN212375659U - Thermal regeneration high-quality asphalt mixture equipment - Google Patents

Abstract

The utility model relates to a high-quality bituminous mixture of thermal regeneration equips, include: the regenerated asphalt mixture stirring equipment, the asphalt station and the crushing, stirring and conveying device are characterized in that in the high-speed rotating process of the spiral component, spiral blades are used for interrupting to generate gaps, waste asphalt pavement materials flow among spirals under the action of centrifugal force, so that the waste asphalt pavement materials are extruded and kneaded mutually, small fine aggregate pellets are further crushed after being cut by blade edges of the spiral blades, the diameter size of the small fine aggregate pellets is smaller than 10mm, the waste asphalt pavement materials are refined, after the waste asphalt pavement materials are stirred by a stirrer of the asphalt station, the size of the small fine aggregate pellets breaks through the size of a large technical bottleneck, high-quality hot regenerated asphalt mixture is produced, and the waste asphalt pavement recycling technology is better popularized and applied.

Description

Thermal regeneration high-quality asphalt mixture equipment

Technical Field

The utility model relates to a bituminous paving material stirring technical field especially relates to a high-quality bituminous mixture of thermal regeneration equips.

Background

With the rapid development of roads in China, by the end of 2019, in a road with 501.25 kilometers of traffic, the traffic distance of an expressway reaches 14.96 kilometers, more than three levels of roads mainly comprising asphalt pavements reach 110 kilometers, 10% of asphalt pavements in China need to be renovated every year, and the waste amount of old asphalt layers reaches 1.6 hundred million tons. According to the basic principle of the outline of the maintenance and management of the twelve and five highways of the department of transportation, the recycling rate of the waste asphalt pavement materials is improved, and the highest requirement is more than 90%. Therefore, the recycling technology of the asphalt pavement material is a basic national policy which accords with the sustainable development of the highway industry in China, and has considerable social and economic benefits and wide market prospect.

The hot recycling asphalt mixture equipment comprises a set of asphalt station (host) and a set of recycling asphalt mixture stirring equipment (auxiliary machine), wherein in the production process, the asphalt station (host) transmits new stone materials meeting the proportion into a stirrer through the working procedures of heating, screening, weighing and the like; meanwhile, the waste asphalt pavement materials are quantitatively transmitted to a main machine stirrer after being crushed, heated and weighed by the regenerated asphalt mixture stirring equipment (an auxiliary machine), and the regenerated asphalt mixture is formed after being mixed and stirred with new stone, hot asphalt and new stone powder and is provided for pavement construction enterprises to be used as asphalt pavement or airport laying materials. The asphalt pavement comprises 0.075-2.36mm stone, 2.36-4.75mm stone, 4.75-9.5mm stone, 9.5-13.2mm stone and 13.2-19mm stone which meet the mixture ratio to form a supporting framework, the asphalt, the 0.075-2.36mm stone and stone powder mixture are filled in the supporting framework to bond the supporting framework into a whole, and the asphalt concrete pavement which is dense, stable, appropriate in roughness and durable is formed.

In the production process of the recycled asphalt mixture stirring equipment, after the waste asphalt pavement materials are heated, a part of asphalt and fine aggregates are adhered to the inner wall of the old material preheating roller, different adhesion results can be generated due to different construction modes, when the interior of the preheating roller reaches a certain temperature, the adhesive material on the inner wall of the roller can be softened, when the gravity of the adhesive material overcomes the adhesion force, the adhesive material can be irregularly flaky and fall off, the adhesive material falls off in the middle of the old material preheating roller, and then the adhesive material enters the hot old material storage bin and becomes spherical; if the waste material falls off from the tail end of the waste material preheating roller, the waste material enters the waste material storage bin in a flaky form. The temperature of the ball-shaped and sheet-shaped old asphalt materials is lower than that of the old asphalt materials after normal heating by more than 30 ℃, the hardness of the ball-shaped and sheet-shaped old asphalt materials is larger than that of the same binder, but the ball-shaped and sheet-shaped old asphalt materials are lower than that of stone materials and are not easy to break. The asphalt is fed into a main machine stirrer after being metered, when the asphalt is stirred together with a new material, spherical and flaky old asphalt materials cannot be completely crushed and exist in the form of small fine aggregate pellets (high asphalt content), the diameter size of the small fine aggregate pellets is larger than 25mm, and when an asphalt pavement is laid, the small fine aggregate pellets (high asphalt content) occupy the space in the asphalt pavement layer in the form of large coarse aggregates, play a role of supporting a framework and cannot be well combined with other aggregates. After the traffic is opened, rolling is carried out for a period of time, because the bearing capacity of small fine aggregate pellets (high in asphalt content) is weak, the local asphalt content is high, when the air temperature is high, the small fine aggregate pellets can become soft, oil can overflow, the pavement layer can be caused to be locally deformed, and then the small fine aggregate pellets can be taken away by a running vehicle, the pavement can be caused to generate small pits, when the road area is water, the pavement part with the small pits can permeate water, the lower pavement layer and the roadbed can be infiltrated, diseases can be caused, a fatigue source is formed in the whole asphalt pavement, after the alternating load effect is realized, the diseased asphalt pavement can be quickly damaged, the service life of the asphalt pavement is extremely short, the regeneration construction failure of the old asphalt material is caused, the traffic is seriously influenced.

At present, because small fine aggregate pellets (high asphalt content) exist in a regenerated asphalt mixture, the regeneration construction technology of old asphalt materials is severely restricted, and the regenerated asphalt mixture becomes a difficult problem in the regenerated asphalt pavement industry, so that most construction enterprises give up utilizing the waste asphalt pavement materials, and all use new stone materials, powder materials and asphalt materials for construction, the recycling rate of the waste asphalt pavement materials is extremely low, the cost of the asphalt pavement materials is increased, and meanwhile, the problem of environmental pollution caused by the waste asphalt pavement materials is also serious.

Disclosure of Invention

The utility model discloses a problem that prior art exists is directed against, creatively conceive of a crushing, stirring and conveyor, its one end connects the agitator of pitch station (host computer), and the swift current silo of regeneration bituminous mixture agitated vessel is connected to the other end, when transmitting old and useless bituminous pavement material to the agitator, is broken again by crushing, stirring and conveyor after heating old and useless bituminous pavement material; in the high-speed rotation process of the spiral component, the spiral blades are used for intermittence to generate gaps, under the action of centrifugal force, waste asphalt pavement materials flow among the spirals to be extruded and kneaded mutually, small fine aggregate pellets (high in asphalt content) are further crushed after being cut by the blade faces of the spiral blades, the diameter size of the small fine aggregate pellets is smaller than 10mm, the waste asphalt pavement materials are refined, the waste asphalt pavement materials are mixed and stirred with high-temperature new stone materials through a stirrer of an asphalt station (host), and the mixture is softened and fragile after heat exchange, and finally, a high-quality hot recycled asphalt mixture with uniform temperature is produced.

Realize the utility model discloses the technical scheme who adopts is: a thermal regeneration premium asphalt mix plant comprising: the device comprises a regenerated asphalt mixture stirring device 1 and an asphalt station 4, and is characterized by further comprising a crushing, stirring and conveying device 3, wherein a chute 2 of the regenerated asphalt mixture stirring device 1 is communicated with a feeding port 18 of the crushing, stirring and conveying device 3 in a sealing manner, and a discharging port of the crushing, stirring and conveying device 3 is communicated with a stirrer 5 of the asphalt station 4 in a sealing manner.

The crushing, stirring and conveying device 3 comprises: the device comprises a motor speed reducer 6, a motor and bearing support 7, a first bearing seat 8, a second bearing 13, a second bearing seat 14, a spiral component 16, a spacer 21, a first bearing 22, a packing gland 24, a box body 23 and a seal 25, wherein a material chamber 10 is arranged in the box body 23, a material outlet 12 is arranged on a front end plate of the box body 23, a shaft hole 29 is arranged on a rear end plate of the box body 23, a material inlet 18 is arranged on an upper cover body of the box body 23, a rear end plate of the box body 23 is fixedly connected with the motor and bearing support 7, the motor speed reducer 6 and the first bearing seat 8 are arranged on the motor and bearing support 7, the first bearing 22 is arranged in the first bearing seat 8, the motor speed reducer 6 and the first bearing seat 8 are fixedly connected with the motor and bearing support 7, the front end plate of the box body 23 is fixedly connected with the second bearing seat 14, the second bearing 13, the material chamber 10 of box 23 in set up spiral subassembly 16, the preceding spindle nose of spiral subassembly 16 pass the discharge gate 12 of box 23 front end plate, the preceding spindle nose of spiral subassembly 16 links firmly with the second bearing 13 in the second bearing frame 14, the back spindle nose of spiral subassembly 16 pass the shaft hole 29 of box 23 rear end plate, the rear axle of spiral subassembly 16 link firmly first bearing 22, spacer 21 and motor reducer 6 in the first bearing frame 8 in proper order set up sealed 25 between the shaft hole 29 of box 23 rear end plate and the back spindle nose of spiral subassembly 16 sealed 25 outside be equipped with packing gland 24, packing gland 24 and box 23 rear end face link firmly.

The screw assembly 16 includes: the spiral blade connecting seat comprises spiral blades 34, a shaft sleeve 35, a shaft 36 and a spiral blade connecting seat 37, wherein the shaft 36 is fixedly connected with the shaft sleeve 35, the spiral blade connecting seat 37 is arranged on the shaft sleeve 35, the screw pitch of the spiral blade connecting seat 37 is 50-70 mm, a group of spiral blades 34 are discontinuously connected on the spiral blade connecting seat 37, and the distance between the spiral blades 34 is 30-40 mm.

The box 23 includes: spiral shell 9, landing leg 11, front end plate 15, last lid 17, rear end plate 19 keep warm spiral shell 9 in be equipped with material room 10, spiral shell 9's preceding terminal surface and front end plate 15 link firmly front end plate 15 on set up discharge gate 12, spiral shell 9's rear end surface and rear end plate 19 link firmly rear end plate 19 on set up shaft hole 29, spiral shell 9's up end and last lid 17 link firmly last lid 17 on set up pan feeding mouth 18, spiral shell 9 and landing leg 11 link firmly.

The second bearing seat 14 includes: the connecting plate 30 is fixedly connected with the top end of the connecting sleeve positioning plate 33, the connecting sleeve 32 penetrates through the lower end of the connecting sleeve positioning plate 33 and is fixedly connected with the lower end of the connecting sleeve positioning plate 33, and the rib plate 31 is fixedly connected with the connecting plate 30, the connecting sleeve 32 and the connecting sleeve positioning plate 33.

The motor reducer 6 is a variable-frequency speed-regulating motor reducer.

The first bearing 22 is a spherical rolling bearing.

The second bearing 13 is a self-lubricating bearing.

The pitch of the spiral blade connecting seat 37 is 60 mm.

The pitch between the helical blades 34 is 35 mm.

The utility model relates to a beneficial effect that high-quality bituminous mixture of thermal regeneration equipped embodies:

1. in the equipment for thermally regenerating the high-quality asphalt mixture, small fine aggregate pellets (high asphalt content) with the diameter size of more than 25mm are all scattered and crushed by a crushing, stirring and conveying device, the small fine aggregate pellets (high asphalt content) are further crushed, and the diameter size is less than 10mm, so that the refinement of the waste asphalt pavement material is achieved, the quality of the regenerated asphalt mixture is further improved, the technical problem of the industry is solved, the technical bottleneck of the small fine aggregate pellets is broken through, and the waste asphalt pavement recycling technology is better popularized and applied;

2. a thermal regeneration high-quality asphalt mixture equipment, add regenerant into crushing, stirs and conveying appliance, make regenerant and asphalt material that needs regeneration fully fuse, thus achieve the goal of regeneration, in the high-speed rotatory course of spiral assembly, utilize helical blade to be interrupted, produce the space, under the effect of centrifugal force, make the old and useless asphalt pavement material flow each other among the spiral, lead to its mutual extrusion, rub, and after blade cutting of the end face of spiral blade, the small fine aggregate pellet (the asphalt content is high) is further broken, the diameter size is smaller than 10mm, greatly raise the old and useless asphalt pavement material and circulate the utilization rate, has reduced the environmental protection pressure that the old and useless asphalt pavement material brings effectively;

3. the equipment for thermally regenerating the high-quality asphalt mixture has the advantages of simple structure, good universality and low manufacturing cost, fully utilizes the waste asphalt pavement materials to produce the high-quality thermally regenerated asphalt mixture, greatly improves the recycling rate of the waste asphalt pavement materials, greatly reduces the production cost for construction enterprises, widens the commercial market of the thermally regenerated asphalt mixture equipment, and effectively drives the rapid development of the thermally regenerated asphalt mixture equipment industry and the downstream industry.

Drawings

FIG. 1 is a three-dimensional schematic view of a thermal regeneration high quality asphalt mixture plant;

FIG. 2 is a three-dimensional schematic view of a reclaimed asphalt mixing plant (attached machine);

FIG. 3 is a three-dimensional schematic view of the crushing, agitating and conveying apparatus;

FIG. 4 is a top view of the crushing, agitating and conveying apparatus;

FIG. 5 is a cross-sectional view A-A of FIG. 4;

FIG. 6 is a three-dimensional schematic view of the housing of the crushing, stirring and conveying device;

FIG. 7 is a three-dimensional schematic view of the part 14 of FIG. 6;

FIG. 8 is a three-dimensional schematic view of the piece 16 of FIG. 5;

FIG. 9 is a right side view of member 16 of FIG. 5;

FIG. 10 is a cross-sectional view B-B of FIG. 9;

FIG. 11 is a front view of member 34 of FIG. 10;

FIG. 12 is a front view of the member 37 of FIG. 10;

FIG. 13 is a flow chart of a construction process of a thermal regeneration high quality asphalt mixture equipment;

in the figure: 1. a regenerated asphalt mixture stirring device (auxiliary machine), 2, a chute, 3, crushing, the asphalt mixing and conveying device comprises an asphalt station (host), a stirrer, a motor reducer, a motor and bearing support, 8 a first bearing seat, 9 a heat-preservation spiral shell, 10 a material chamber, 11 supporting legs, 12 a discharge port, 13 a second bearing, 14 a second bearing seat, 15 a front end plate, 16 a spiral component, 17 an upper cover body, 18 a feeding port, 19 a rear end plate, 20 bolts, 21 a spacer bush, 22 a first bearing, 23 a box body, 24 a packing gland, 25 a seal, 26 an inner hexagon bolt, 27 a double-headed nut, 28 a gasket, 29 an axle hole, 30 a connecting plate, 31 a rib plate, 32 a connecting sleeve, 33 a connecting sleeve positioning plate, 34 a spiral blade, 35 an axle sleeve, 36 an axle and 37 a spiral blade connecting seat.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and specific embodiments, which are described herein for purposes of illustration only and are not intended to limit the present invention.

Referring to fig. 8, 9, 10, 11 and 12, the screw assembly 16 includes: the spiral blade connecting seat comprises a spiral blade 34, a shaft sleeve 35, a shaft 36 and a spiral blade connecting seat 37, wherein the shaft 36 is fixedly connected with the shaft sleeve 35, the spiral blade connecting seat 37 is arranged on the shaft sleeve 35, and the screw pitch of the spiral blade connecting seat 37 is 50-70 mm; the spiral blade connecting seat 37 is discontinuously connected with a group of spiral blades 34, and the distance between the spiral blades 34 is 30-40 mm. Preferably, the pitch of the connecting seat 37 of the spiral blade is 60mm, the distance between the spiral blades 34 is 35mm, the spiral conveying length is more than 1.5 m, and the striking times are about 25.

Referring to fig. 6 and 7, the box 23 includes: spiral shell 9, landing leg 11, front end plate 15, last lid 17, rear end plate 19 keep warm spiral shell 9 in be equipped with material room 10, spiral shell 9's preceding terminal surface and front end plate 15 link firmly front end plate 15 on set up discharge gate 12, spiral shell 9's rear end surface and rear end plate 19 link firmly rear end plate 19 on set up shaft hole 29, spiral shell 9's up end and last lid 17 link firmly last lid 17 on set up pan feeding mouth 18, spiral shell 9 and landing leg 11 link firmly. The second bearing seat 14 includes: the connecting plate 30 is fixedly connected with the top end of the connecting sleeve positioning plate 33, the connecting sleeve 32 penetrates through the lower end of the connecting sleeve positioning plate 33 and is fixedly connected with the lower end of the connecting sleeve positioning plate 33, and the rib plate 31 is fixedly connected with the connecting plate 30, the connecting sleeve 32 and the connecting sleeve positioning plate 33.

With reference to fig. 3, 4 and 5, the crushing, stirring and conveying device 3 comprises: the device comprises a motor speed reducer 6, a motor and bearing support 7, a first bearing seat 8, a second bearing 13, a second bearing seat 14, a spiral component 16, a spacer 21, a first bearing 22, a packing gland 24, a box body 23 and a seal 25, wherein a material chamber 10 is arranged in the box body 23, a material outlet 12 is arranged on a front end plate of the box body 23, a shaft hole 29 is arranged on a rear end plate of the box body 23, a material inlet 18 is arranged on an upper cover body of the box body 23, a rear end plate of the box body 23 is fixedly connected with the motor and bearing support 7, the motor speed reducer 6 and the first bearing seat 8 are arranged on the motor and bearing support 7, the first bearing 22 is arranged in the first bearing seat 8, the motor speed reducer 6 and the first bearing seat 8 are fixedly connected with the motor and bearing support 7, the front end plate of the box body 23 is fixedly connected with the second bearing seat 14, the second bearing 13, the material chamber 10 of box 23 in set up spiral subassembly 16, the preceding spindle nose of spiral subassembly 16 pass the discharge gate 12 of box 23 front end plate, the preceding spindle nose of spiral subassembly 16 links firmly with the second bearing 13 in the two bearing frame 14, the back spindle nose of spiral subassembly 16 pass the shaft hole 29 of box 23 rear end plate, the rear axle of spiral subassembly 16 link firmly first bearing 22, spacer 21 and motor reducer 6 in the first bearing frame 8 in proper order set up sealed 25 between the shaft hole 29 of box 23 rear end plate and the back spindle nose of spiral subassembly 16 sealed 25 outside be equipped with packing gland 24, packing gland 24 and box 23 rear end face link firmly. The motor reducer 6 is preferably a variable-frequency speed-regulating motor reducer, the first bearing 22 is preferably a spherical rolling bearing, and the second bearing 13 is preferably a self-lubricating bearing.

Referring to fig. 1 and 2, a thermal regeneration high quality asphalt mixture equipment includes: the device comprises a regenerated asphalt mixture stirring device 1, an asphalt station 4 and a crushing, stirring and conveying device 3, wherein a chute 2 of the regenerated asphalt mixture stirring device 1 is communicated with a feeding port 18 of the crushing, stirring and conveying device 3 in a sealing mode, and a discharging port of the crushing, stirring and conveying device 3 is communicated with a stirrer 5 of the asphalt station 4 in a sealing mode.

Example 1:

referring to the attached figure 13, a thermal regeneration high-quality asphalt mixture equipment construction process flow chart comprises an asphalt pavement old material thermal regeneration production step and an asphalt pavement new material production step:

firstly, the thermal regeneration production steps of the old asphalt pavement materials comprise:

1) collecting the old asphalt pavement material, and conveying the old asphalt pavement material to a mixing place for later use;

2) pouring the collected old asphalt pavement materials into a hopper of crushing and screening equipment by using a loader, uniformly feeding the materials to a jaw crusher for primary crushing by using a vibrating feeder subjected to crushing and screening, conveying the primary crushed materials to a hammer crusher for secondary crushing by using a belt conveyor, conveying the secondary crushed materials to a vibrating screen by using the belt conveyor for screening and grading, and dividing the materials into the old asphalt pavement materials with two specifications of 0.075-4.75 mm and 9.5-13.2 mm;

3) conveying 384-390 parts by weight of an old asphalt pavement material with the specification of 0.075-4.75 mm and 430-436 parts by weight of an old asphalt pavement material with the specification of 9.5-13.2mm into an old material preheating roller for preheating the old material, wherein the inclination angle of the old material preheating roller is 3.5 degrees, the rotation number is 8 r/min, the temperature of the old asphalt pavement material is controlled to be 115-145 ℃ through hot smoke generated by combustion of a fuel burner, and the heating time is 3-5 minutes;

4) the preheated old asphalt pavement materials with the two specifications in the step 3) enter a storage bin, the temperature in the storage bin is 100-110 ℃, and the discharging amount of a discharging door of the storage bin is automatically controlled;

5) placing the hot old asphalt pavement material discharged from the storage bin in the step 4) into a weighing scale, and weighing 815-827 parts by weight;

6) putting the regenerant into a weighing scale to weigh 1 part by weight;

7) putting the hot old asphalt pavement material obtained in the step 5) into a crushing, stirring and conveying device, and spraying the regenerant obtained in the step 6) into a screw of the crushing, stirring and conveying device, wherein the rotating speed of the crushing, stirring and conveying device is 116 rpm, and the heat preservation temperature of the crushing, stirring and conveying device is 130-140 ℃;

8) fusing the hot old asphalt pavement material obtained in the step 7) with a regenerant to produce an old asphalt pavement material hot regenerated material;

secondly, the production steps of the asphalt pavement new material comprise:

a) respectively loading 545 parts by weight of 540-5 mm-sized new stone material, 500 parts by weight of 495-10 mm-sized new stone material and 360 parts by weight of 355-15 mm-sized new stone material into three cold hoppers, and controlling the feeding amount of the new stone material through different opening degrees of hopper doors and stepless speed regulation of a feeder;

b) 1390-;

c) conveying the hot new stone obtained in the step b) to a hot vibrating screen by a bucket elevator for screening, and respectively conveying the hot new stone into respective storage bins according to three specifications of 0.075-4.75 mm, 4.75-9.5mm and 9.5-13.2mm, wherein the temperature in each storage bin is 150-160 ℃, and the discharging amount of a discharging door of each storage bin is automatically controlled;

d) respectively putting the new stones with the three specifications in the step c) into a weighing scale, wherein the new stones with the specifications of 0.075-4.75 mm are 540-broken stones, the new stones with the specifications of 4.75-9.5mm are 495-broken stones 500 and the new stones with the specifications of 9.5-13.2mm are 355-broken stones 360;

e) pumping asphalt from an asphalt tank by using a heat-preservation three-screw pump, and feeding the asphalt into an asphalt weighing scale to weigh 72-74 parts by weight of No. 90 new asphalt;

f) weighing 20-22 parts of new stone powder by a weighing scale;

g) according to the weight parts, 815-827 parts of an old asphalt pavement hot recycling material, 535-545 parts of a new stone material with the specification of 0.075-4.75 mm, 495-505 parts of the new stone material with the specification of 4.75-9.5mm, 360-365 parts of the new stone material with the specification of 9.5-13.2mm, 72-74 parts of 90-grade asphalt and 20-22 parts of new stone powder are crushed, stirred and conveyed by a crushing, stirring and conveying device, the old asphalt pavement hot recycling material enters a stirring cylinder, then the stirrer of the stirring cylinder is stirred for 2-5 seconds, and then the new stone materials with the three specifications are put into the stirring cylinder, and are pumped into new asphalt by a heat-insulating screw pump and then are put into the new stone powder to be stirred for 20-25 seconds;

h) the finished product high-quality hot recycled asphalt mixture with the temperature of 145-155 ℃ is obtained.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. A thermal regeneration premium asphalt mix plant comprising: the device is characterized by further comprising a crushing, stirring and conveying device (3), wherein a chute (2) of the regenerated asphalt mixture stirring device (1) is communicated with a feeding port (18) of the crushing, stirring and conveying device (3) in a sealing mode, and a discharge port of the crushing, stirring and conveying device (3) is communicated with a stirrer (5) of the asphalt station (4) in a sealing mode.

2. The equipment for hot recycling of bituminous mixes of good quality according to claim 1, characterized in that said crushing, stirring and conveying means (3) comprise: the packing box comprises a motor speed reducer (6), a motor and bearing support (7), a first bearing seat (8), a second bearing (13), a second bearing seat (14), a spiral component (16), a spacer bush (21), a first bearing (22), a packing gland (24), a box body (23) and a seal (25), wherein a material chamber (10) is arranged inside the box body (23), a discharge hole (12) is formed in a front end plate of the box body (23), a shaft hole (29) is formed in a rear end plate of the box body (23), a feeding hole (18) is formed in an upper cover body of the box body (23), the rear end plate of the box body (23) is fixedly connected with the motor and bearing support (7), the motor and bearing support (7) is provided with the motor speed reducer (6) and the first bearing seat (8), the first bearing (22) is arranged in the first bearing seat (8), the motor speed reducer (6) and the first bearing seat (8) are fixedly connected with the motor and bearing support (7, the box body (23) front end plate is fixedly connected with a second bearing seat (14), a second bearing (13) is arranged in the second bearing seat (14), a spiral assembly (16) is arranged in a material chamber (10) of the box body (23), a front shaft head of the spiral assembly (16) penetrates through a material outlet (12) of the box body (23) front end plate, a front shaft head of the spiral assembly (16) is fixedly connected with the second bearing (13) in the second bearing seat (14), a rear shaft head of the spiral assembly (16) penetrates through a shaft hole (29) of a rear end plate of the box body (23), a rear shaft of the spiral assembly (16) is fixedly connected with a first bearing (22), a spacer bush (21) and a motor (6) in the first bearing seat (8) in sequence, a seal (25) is arranged between the shaft hole (29) of the rear end plate of the box body (23) and the rear shaft head of the spiral assembly (16), a packing gland (24) is arranged outside the seal (25), and the packing gland (24) is fixedly connected with the rear end face of the box body (23).

3. A hot mix plant of high quality according to claim 2, characterized in that said screw assembly (16) comprises: helical blade (34), axle sleeve (35), axle (36), helical blade connecting seat (37), axle (36) and axle sleeve (35) link firmly axle sleeve (35) on set up helical blade connecting seat (37), the pitch of helical blade connecting seat (37) be 50-70 mm helical blade connecting seat (37) on be interrupted and connect a set of helical blade (34), the interval between helical blade (34) is 30-40 mm.

4. A plant for hot recycling of bituminous mixes of good quality according to claim 2, characterized in that said box (23) comprises: spiral shell (9), landing leg (11), front end plate (15), go up lid (17), rear end plate (19) keep warm spiral shell (9) in be equipped with material room (10), the preceding terminal surface and front end plate (15) of spiral shell (9) keep warm link firmly front end plate (15) on set up discharge gate (12), the rear end face and rear end plate (19) of spiral shell (9) that keep warm link firmly rear end plate (19) on set up shaft hole (29), the up end and the last lid (17) of spiral shell (9) that keep warm link firmly last lid (17) on set up pan feeding mouth (18), spiral shell (9) and landing leg (11) that keep warm link firmly.

5. A hot mix plant of high quality according to claim 2, characterized in that said second bearing block (14) comprises: connecting plate (30), gusset (31), adapter sleeve (32), adapter sleeve locating plate (33), connecting plate (30) and adapter sleeve locating plate (33) top link firmly, adapter sleeve (32) pass adapter sleeve locating plate (33) lower extreme and link firmly, gusset (31) and connecting plate (30), adapter sleeve (32), adapter sleeve locating plate (33) link firmly.

6. The equipment for the thermal regeneration of the high-quality asphalt mixture according to claim 2, wherein the motor reducer (6) is a variable-frequency speed-regulating motor reducer.

7. The equipment for hot recycling of bituminous mixes of good quality according to claim 2, characterized in that said first bearing (22) is a spherical rolling bearing.

8. The equipment for hot recycling of bituminous mixes of good quality according to claim 2, characterized in that said second bearing (13) is a self-lubricating bearing.

9. The equipment for hot recycling high quality asphalt mixture according to claim 3, wherein the pitch of the spiral blade connecting seat (37) is 60 mm.

10. A hot mix plant of high quality according to claim 3 or claim 9, characterized in that the pitch between said helical blades (34) is 35 mm.

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