CN215390600U - A drum sieve for peeling off bituminous mixture surface pitch - Google Patents

Abstract

A drum screen for stripping asphalt on the surface of an asphalt mixture comprises a screen drum and an abrasive material supply device, wherein the screen drum comprises a fine material screening area, a medium material screening area and a coarse material screening area which are sequentially arranged along the flow direction of the asphalt mixture; the abrasive supply device is used for supplying abrasive to the medium material screening area and the coarse material screening area and comprises an abrasive storage tank, an abrasive conveying assembly and an air supply assembly, wherein the abrasive storage tank is used for storing the abrasive; the abrasive conveying assembly comprises an abrasive conveying pipe and a plurality of spray heads, wherein one end of the abrasive conveying pipe is connected with the abrasive storage tank, and the other end of the abrasive conveying pipe extends to the intermediate material screening area through the coarse material screening area; the air feeding assembly is connected with the abrasive conveying pipe so as to send the abrasives in the abrasive conveying pipe into the medium material screening area or the coarse material screening area through the spray head, and the screen cylinder is matched with the abrasive conveying device so that the roller screen can complete the stripping of the asphalt on the surface of the asphalt mixture while carrying out classification treatment, the working efficiency is improved, and the expenditure of equipment cost is further saved.

Description

A drum sieve for peeling off bituminous mixture surface pitch

Technical Field

The utility model belongs to the field of asphalt mixture treatment, and particularly relates to a rotary screen for stripping asphalt on the surface of an asphalt mixture.

Background

With the vigorous development of highway construction in recent decades, the quantity of waste asphalt mixtures generated by the overhaul and overhaul of roads is increased every year, if the waste asphalt mixtures cannot be reasonably utilized, huge resource waste and environmental pollution are brought to the society, and the recycling of the waste asphalt mixtures becomes a hot topic worldwide. The regeneration technology of the asphalt mixture is a technology for recycling the waste asphalt mixture, the existing hot regeneration technology and cold regeneration technology in the industry mainly exist, the hot regeneration technology comprises plant-mixed hot regeneration and in-situ hot regeneration technology, the cold regeneration technology comprises plant-mixed cold regeneration and in-situ cold regeneration technology, the waste asphalt mixture is crushed and screened, and the whole waste asphalt mixture is subjected to heating treatment or no treatment according to a certain set proportion and is directly mixed and stirred with a certain amount of new aggregate and new asphalt to generate a new asphalt mixture, and the new asphalt mixture is reused on an asphalt pavement road.

In the prior art, cold regeneration can only be used for paving a pavement sub-base layer, and the regeneration utilization rate is low. The method has the problems that in the whole heating process of the waste asphalt mixture, the asphalt on the surface of the waste asphalt mixture is in direct contact with a heating medium, so that the aging and burning of the asphalt on the surface are very easily caused, the problems of slow heating and uneven heating of the internal aggregate are caused, the heating control difficulty is high, the asphalt component on the surface of the waste asphalt mixture is greatly damaged, meanwhile, the failure of serious adhesion of the asphalt in heating equipment is easily caused in the heating process of the waste asphalt mixture, the continuous generation cannot be realized, and in the process, the waste asphalt mixture is in the heating process of mechanical equipment, the asphalt is very easy to adhere to the interior of the equipment seriously, and the waste asphalt mixture is very easy to form various complex problems such as segregation variation and the like, so that the quality of the final asphalt mixture is poor, and the construction quality of the pavement is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide a rotary screen for stripping asphalt on the surface of an asphalt mixture.

The utility model adopts the following technical scheme:

a drum screen for stripping asphalt on the surface of an asphalt mixture comprises a screen drum and an abrasive material supply device, wherein the screen drum comprises a fine material screening area, a medium material screening area and a coarse material screening area which are sequentially arranged along the flow direction of the asphalt mixture; the abrasive supply device is used for supplying abrasive to the medium material screening area and the coarse material screening area and comprises an abrasive storage tank, an abrasive conveying assembly and an air supply assembly, wherein the abrasive storage tank is used for storing the abrasive; the abrasive conveying assembly comprises an abrasive conveying pipe and a plurality of spray heads, wherein one end of the abrasive conveying pipe is connected with the abrasive storage tank, and the other end of the abrasive conveying pipe extends to the intermediate material screening area through the coarse material screening area; the air supply assembly is connected with the abrasive conveying pipe so as to supply the abrasive in the abrasive conveying pipe to the medium material screening area or the coarse material screening area through the spray head.

Further, the air supply assembly comprises a compressed air storage tank, a first air supply pipe, a second air supply pipe and a plurality of air distribution pipes, wherein one end of the first air supply pipe is connected with the compressed air storage tank, the other end of the first air supply pipe is connected with the input end of the abrasive conveying pipe, the other end of the second air supply pipe is connected with the side wall of the abrasive conveying pipe, and the second air supply pipe is connected with the compressed air storage tank, and the air distribution pipes are respectively connected between the second air supply pipe and the plurality of spray heads.

Furthermore, the side of shower nozzle is provided with high-pressure air and connects, trachea one end is connected the other end with the second air supply pipe with high-pressure air connects.

Furthermore, a feeder is arranged at the bottom of the abrasive storage tank, one end of the feeder is connected with the input end of the abrasive conveying pipe, and the other end of the feeder is connected with the first air supply pipe.

Further, compressed air storage jar is including gas outlet and pressure regulation table, first air supply pipe is connected with the gas outlet, second air supply pipe one end is connected the other end with first air supply pipe and is connected with abrasive material conveyer pipe lateral wall.

Furthermore, the screen drum also comprises a fine material outlet communicated with the fine material screening area, a medium material outlet communicated with the medium material screening area, a coarse material rough opening communicated with the coarse material screening area, a fine material discharging box connected with the fine material outlet, a medium material discharging box connected with the medium material outlet and a coarse material discharging box connected with the coarse material outlet.

Furthermore, the discharge ends of the medium material discharge box and the coarse material discharge box are both connected with an abrasive filter, one end of the abrasive filter is connected with the medium material discharge box or the coarse material discharge box, and the other end of the abrasive filter is connected with the abrasive storage tank.

Furthermore, the discharge end of the screen drum is provided with an over-specification discharge box.

Furthermore, the discharge end of the discharge box with the over-specification size is provided with an abrasive filter.

As can be seen from the above description of the present invention, compared with the prior art, the beneficial effects of the present invention are: the screen cylinder is provided with a plurality of screen areas to classify the asphalt mixture, and the medium material screen area and the coarse material screen area are arranged on the spray head to spray abrasive to impact the asphalt mixture with larger grain diameter to strip the asphalt, so that the damage to aggregate in the asphalt mixture is avoided, the recovery rate of the asphalt is improved, and a series of unnecessary problems caused when the asphalt mixture is recycled and heated are prevented; the screen drum is matched with the abrasive material conveying device, so that the roller screen can complete the stripping of asphalt on the surface of the asphalt mixture while performing grading treatment, the working efficiency is improved, and the expenditure of equipment cost is further saved;

the high-pressure air joint connected with the air distribution pipe is arranged on the side edge of the spray head, and the grinding material is pressurized instantly when being sent out of the spray head, so that the grinding material is output from the spray head instantly to form a high-speed state to impact the asphalt mixture, the stripping rate of asphalt on the surface of the asphalt mixture is improved, and the recovery rate of the asphalt is further improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of an abrasive conveying apparatus;

FIG. 3 is an enlarged view at A in FIG. 2;

in the figure, 1-crushing device, 2-rotary screen, 3-abrasive filter, 4-vibration screening device, 5-dust hood, 6-dust remover, 11-temporary storage bin, 12-crusher, 13-belt conveyor, 21-screen cylinder, 211-fine screening area, 212-intermediate screening area, 213-coarse screening area, 214-fine discharging box, 215-intermediate discharging box, 216-coarse discharging box, 217-super-specification discharging box, 22-abrasive conveying device, 221-abrasive storage tank, 2211-feeder, 222-abrasive conveying pipe, 223-spray head, 2231-high-pressure air joint, 224-compressed air storage tank, 225-first air supply pipe, 226-second air supply pipe, 227-air distribution pipe, 228-air outlet, 229-pressure regulation gauge.

Detailed Description

The utility model is further described below by means of specific embodiments.

Referring to fig. 1 to 3, an asphalt stripping system for an asphalt mixture surface comprises a crushing device 1, a drum screen 2, an abrasive filter 3, a vibrating screen device 4, a dust hood 5 and a dust remover 6.

Crushing treatment is carried out to the bituminous mixture of retrieving to breaker 1, including temporary storage storehouse 11, the breaker 12 of being connected with temporary storage storehouse 11, one end and breaker 12 are connected the other end and are connected the band conveyer 13 that is used for carrying the bituminous mixture after the breakage with drum sieve 2 that are used for temporary storage bituminous mixture, and is specific, breaker 12 be the equipment commonly used in the broken field of bituminous mixture, and this side does not do further giving unnecessary details to its concrete structure and theory of operation.

The drum screen 2 is used for screening the crushed asphalt mixture and stripping asphalt on the surface of the asphalt mixture and comprises a frame, a screen drum 21 and an abrasive supplying device 22.

The screen drum 21 is rotatably and obliquely arranged on the frame, the feed end of the screen drum is positioned at a high position, and the discharge end of the screen drum is positioned at a low position; the asphalt mixing material screening device comprises a fine material screening area 211, a medium material screening area 212 and a coarse material screening area 213 which are sequentially arranged along the flow direction of asphalt mixtures, a fine material outlet connected with the fine material screening area 211, a medium material outlet connected with the medium material screening area 212, a coarse material outlet connected with the coarse material screening area 213, a fine material discharging box 214 connected with the fine material outlet, a medium material discharging box 215 connected with the medium material outlet, a coarse material discharging box 216 connected with the coarse material outlet and an over-specification discharging box 217 connected with the discharging end of a screen cylinder, wherein the screen cylinder 21 which is rotatably arranged is used for carrying out multi-stage screening on the crushed asphalt mixtures so as to meet the production requirements; specifically, in the application, the fine materials refer to the asphalt mixture with the particle size of less than 4.75 mm; the medium material is asphalt mixture with the grain diameter between 4.75-13 mm; coarse material refers to asphalt mixture with the particle size of 13-25 mm; the over-specification refers to the asphalt mixture with the particle size of more than 25 mm.

The abrasive supply device 22 is used for supplying abrasive to the medium material screening area 212 and the coarse material screening area 213 of the screen cylinder 21, and comprises an abrasive storage tank 221, an abrasive conveying assembly and an air supply assembly, wherein the abrasive storage tank 221 is used for storing abrasive, and a discharge hole of the abrasive storage tank is provided with a feeder 2211.

The abrasive conveying assembly comprises an abrasive conveying pipe 222 and a plurality of spray heads 223, wherein one end of the abrasive conveying pipe 222 is connected with the feeder 2211, and the other end of the abrasive conveying pipe 222 penetrates through the discharge end of the screen cylinder 21 and extends inwards to the intermediate material screening area 212 through the coarse material screening area 213; a plurality of spray heads 223 are arranged on the abrasive conveying pipe 222 at intervals at one section of the screen drum 21, and are respectively opposite to the medium material screening area 212 and the coarse material screening area 213; after the abrasives in the abrasive storage tank 221 flow into the abrasive conveying pipe 222 through the feeder 2211, the abrasives are respectively sprayed into the medium material screening area 212 and the coarse material screening area 213 through the spray head 223 to collide with the asphalt mixture in the medium material screening area 212 and the coarse material screening area 213, so as to strip the asphalt on the surface of the asphalt mixture; the plurality of nozzles 223 can form a plurality of nozzle groups along the length direction of the abrasive conveying pipe 222, each nozzle group comprises a plurality of nozzles distributed circumferentially, when the asphalt mixture flows inside the rotating screen drum 21, the plurality of nozzles distributed circumferentially can spray the abrasive on the surface of the asphalt mixture to strip the asphalt, so that the asphalt stripping rate of the asphalt mixture is improved, and when the asphalt stripping machine is used, the entering amount of the asphalt mixture or the working amount of the nozzles 223 can be controlled according to production requirements, so that the higher asphalt stripping rate can be obtained as much as possible.

The air supply assembly is connected with the abrasive conveying assembly to supply the abrasive in the abrasive conveying pipe into the medium screening zone 212 or the coarse material screening zone 213 through the spray head, and comprises a compressed air storage tank 224, a first air supply pipe 225 with one end connected with the compressed air storage tank 224 and the other end connected with the abrasive conveying pipe 222 through a feeder 2211, a second air supply pipe 226 with one end connected with the compressed air storage tank 224 and the other end connected with the side wall of the abrasive conveying pipe 222, and a plurality of air distribution pipes 227 connected between the second air supply pipe 226 and the spray head 223, in particular, the side of the spray head 223 is provided with a high-pressure air joint 2231, the branch pipe 22 is connected between the high pressure air joint 2231 and the second air feeding pipe 227, by providing a high pressure air connection 2231 between the gas distribution pipe 227 and the spray head 223, pressurizing is carried out instantly when the abrasive is sent out of the spray head 223, so that the abrasive is output from the spray head 223 instantly to form a high-speed state to impact the asphalt mixture to strip the asphalt on the surface of the asphalt mixture; specifically, the compressed air storage tank 224 includes an air outlet 228 and a pressure adjustment gauge 229, wherein one end of the first air supply pipe 225 is connected to the air outlet 228, one end of the second air supply pipe 226 is connected to the first air supply pipe 225, and the other end is connected to the side wall of the abrasive material delivery pipe 222; the amount of gas is controlled by the pressure adjusting gauge 229, and is matched with the amount of the asphalt mixture entering the screen drum 21, so as to ensure the asphalt stripping rate of the asphalt mixture.

A plurality of abrasive filter devices 3 are arranged, and a plurality of abrasive conveyors 3 are respectively connected with the medium material discharging box 215, the coarse material discharging box 216 and the over-specification discharging box 217 so as to filter the abrasives in the processed asphalt mixture; specifically, one end of the abrasive filter 3 is connected to the middle material discharging tank 215, the coarse material discharging tank 216 or the over-specification discharging tank 217, and the other end is connected to the abrasive storage tank 221, so as to recycle the filtered abrasive to the abrasive storage tank 221 for reuse; further, the abrasive filter 3 is a device commonly used in the field of material filtering, and the detailed structure and working principle thereof are not further described herein.

The vibration screening device 4 is respectively connected with the abrasive filter 3 opposite to the medium material discharging box 215, the coarse material discharging box 216 and the over-specification discharging box 217 so as to receive the asphalt mixture after the abrasive is filtered by the relative abrasive filter 3; the vibratory screening device 4 screens the asphalt mixture after asphalt stripping to obtain a multi-stage asphalt mixture and asphalt sand, wherein the asphalt sand is a mixture formed by stripping off the surfaces of medium aggregates and coarse aggregates and partially regenerated fine aggregates, powder and the like; specifically, one end of the vibration screening device 4 is connected with the temporary storage bin 11, so that the high-specification asphalt mixture obtained by screening can be sent into the temporary storage bin 11, then sent into the crusher 12 for secondary crushing, and then sent into the rotary screen 2 again for treatment; further, the vibrating screen device 4 is a device commonly used in the field of material screening, and the specific structure and the working principle thereof are not further described herein.

The dust hood 5 is arranged above the drum screen 2 and covers the drum screen 2 outside, so that the whole area of the drum screen 2 forms a negative pressure state, and the dust is prevented from overflowing to cause environmental pollution; the dust remover 6 is connected with the dust hood 5 to treat the dust adsorbed and collected by the dust hood 5; specifically, the dust hood 5 and the dust remover 6 are common devices in the field of dust removal, and the detailed structure and operation thereof are not further described herein.

A method for stripping asphalt on the surface of an asphalt mixture comprises the following steps:

firstly, feeding the asphalt mixture collected by the temporary storage bin 11 into a crusher 12 for crushing;

secondly, feeding the crushed asphalt mixture into a screen drum 21, wherein the screen drum 21 rotates to drive the asphalt mixture to flow along the discharge end of the screen drum 21;

step three, when the screen drum 21 rotates, the abrasive in the abrasive storage tank 221 is respectively sprayed into the medium material screening area 212 and the coarse material screening area 213 of the screen drum 21 through the abrasive conveying pipe 222 by the spray head 223 through the air conveying assembly, and the high-pressure air joint 2231 on the side of the spray head 223 instantly pressurizes when the abrasive is sent out of the spray head 223, so that the abrasive is output from the spray head 223 instantly to form high-speed abrasive which collides with asphalt materials, and asphalt on the surface of the asphalt mixture is peeled;

step four, directly using the asphalt mixture from the fine material discharging box 214 for production, filtering abrasive materials from the asphalt mixture from the medium material discharging box 215, the coarse material discharging box 216 and the over-specification discharging box 217 by using an abrasive material filter 3, then intensively sending the asphalt mixture into a vibration screening device 4 for screening, and sending the abrasive materials obtained by filtering by using the abrasive material filter 3 back to the abrasive material storage tank 221 for recycling;

screening the processed asphalt mixture by a vibration screening device 4 to obtain fine materials, medium materials, coarse materials and ultra-standard asphalt mixtures, wherein the obtained fine materials, medium materials and coarse materials are directly used for production; and conveying the over-specification asphalt mixture to a temporary storage bin 11, performing secondary crushing by using a crusher 12, and treating by using a rotary screen 3 again.

According to the asphalt mixture screening machine, the screen drum 21 is matched with the abrasive conveying device 22, so that when the crushed asphalt mixture is screened, the abrasive sprayed by the spray head 223 can be used for stripping the surfaces of the asphalt mixture in the intermediate material screening area 215 and the coarse material screening area 216, so that the sprayed abrasive can impact the asphalt mixture with larger particle size to strip asphalt, the aggregate in the asphalt mixture is prevented from being damaged, the recovery rate of the asphalt is improved, and a series of unnecessary problems caused by recycling and heating of the asphalt mixture are prevented; the screen drum 21 is provided with a plurality of screen areas to classify the asphalt mixture, and the medium material screening area 215 and the coarse material screening area 216 are arranged at the spray heads 223 to spray abrasive materials to impact and strip the asphalt mixture with larger grain size, and the working number of the spray heads 223 can be controlled aiming at the asphalt mixtures with different grain sizes during processing so as to maximize the asphalt stripping rate of the asphalt mixture; the screen drum 21 is matched with the abrasive material conveying device 22, so that the roller screen 2 can complete the stripping of asphalt on the surface of the asphalt mixture while performing grading treatment, the working efficiency is improved, and the expenditure of equipment cost is further saved.

The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the utility model, which is defined by the appended claims and their equivalents and modifications within the scope of the description.

Claims (9)

1. The utility model provides a drum sieve for peeling off bituminous mixture surface pitch which characterized in that: the device comprises a screen drum and an abrasive material supply device, wherein the screen drum comprises a fine material screening area, a medium material screening area and a coarse material screening area which are sequentially arranged along the flow direction of an asphalt mixture; the abrasive supply device is used for supplying abrasive to the medium material screening area and the coarse material screening area and comprises an abrasive storage tank, an abrasive conveying assembly and an air supply assembly, wherein the abrasive storage tank is used for storing the abrasive; the abrasive conveying assembly comprises an abrasive conveying pipe and a plurality of spray heads, wherein one end of the abrasive conveying pipe is connected with the abrasive storage tank, and the other end of the abrasive conveying pipe extends to the intermediate material screening area through the coarse material screening area; the air supply assembly is connected with the abrasive conveying pipe so as to supply the abrasive in the abrasive conveying pipe to the medium material screening area or the coarse material screening area through the spray head.

2. The trommel for stripping asphalt from the surface of asphalt mixture according to claim 1, wherein: the air supply assembly comprises a compressed air storage tank, a first air supply pipe, a second air supply pipe and a plurality of air distribution pipes, wherein the other end of the first air supply pipe is connected with the input end of the abrasive conveying pipe, one end of the second air supply pipe is connected with the compressed air storage tank, the other end of the second air supply pipe is connected with the side wall of the abrasive conveying pipe, and the plurality of air distribution pipes are respectively connected between the second air supply pipe and the plurality of spray heads.

3. The rotary screen for stripping asphalt from the surface of asphalt mixture according to claim 2, wherein: the side of shower nozzle is provided with high-pressure air and connects, trachea one end is connected the other end with the high-pressure air and is connected with the second air supply pipe with high-pressure air.

4. The rotary screen for stripping asphalt from the surface of asphalt mixture according to claim 2, wherein: the bottom of abrasive storage tank is provided with the dispenser, and dispenser one end is connected the other end and is connected with first blast pipe with the input of abrasive conveyer pipe.

5. The rotary screen for stripping asphalt from the surface of asphalt mixture according to claim 2, wherein: the compressed air storage tank comprises an air outlet and a pressure regulating meter, the first air supply pipe is connected with the air outlet, and one end of the second air supply pipe is connected with the first air supply pipe, while the other end is connected with the side wall of the abrasive conveying pipe.

6. The trommel for stripping asphalt from the surface of asphalt mixture according to claim 1, wherein: the screen drum further comprises a fine material outlet communicated with the fine material screening area, a medium material outlet communicated with the medium material screening area, a coarse material rough opening communicated with the coarse material screening area, a fine material discharging box connected with the fine material outlet, a medium material discharging box connected with the medium material outlet and a coarse material discharging box connected with the coarse material outlet.

7. The rotary screen for stripping asphalt from the surface of asphalt mixture according to claim 6, wherein: the discharge ends of the medium material discharge box and the coarse material discharge box are both connected with an abrasive filter, one end of the abrasive filter is connected with the medium material discharge box or the coarse material discharge box, and the other end of the abrasive filter is connected with the abrasive storage tank.

8. The rotary screen for stripping asphalt from the surface of asphalt mixture according to claim 6, wherein: the discharge end of the screen drum is provided with an over-specification discharge box.

9. The trommel for stripping asphalt from the surface of asphalt mixture according to claim 8, wherein: and the discharge end of the discharge box with the over-specification size is provided with an abrasive filter.

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