CN212688622U - Hot mix plant recycling asphalt mixture mixing system - Google Patents
Hot mix plant recycling asphalt mixture mixing system Download PDFInfo
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- CN212688622U CN212688622U CN202020399076.7U CN202020399076U CN212688622U CN 212688622 U CN212688622 U CN 212688622U CN 202020399076 U CN202020399076 U CN 202020399076U CN 212688622 U CN212688622 U CN 212688622U
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Abstract
The utility model discloses a plant-mixed hot recycling asphalt mixture mixing system, which comprises an old material heat treatment device for heating waste asphalt mixtures; a conveying device; the adding device is used for adding a regenerant into the heated waste asphalt mixture; a storage device for storing new aggregate; an asphalt adding device and a mixing device; the old material heat treatment device is connected with the mixing device through a conveying device; the adding device is arranged between the old material heat treatment device and the mixing device; so that the regenerant can be added into the waste asphalt mixture after the heat treatment before the waste asphalt mixture enters the mixing device. Implement the utility model discloses, can reduce the waste of regenerant, improve its utilization efficiency, promote regeneration bituminous mixture's performance.
Description
Technical Field
The utility model relates to a hot regeneration field of plantmix especially relates to a hot regeneration bituminous mixture mix system of plantmix.
Background
By the end of 2018, the mileage of roads of four grades and above in China reaches 484.65 kilometers, wherein the mileage of an expressway is 14.26 kilometers, thirteen-five grades are a key period for accelerating the web formation of the highway in China, about 3 kilometers of the newly-built expressway is about 10 kilometers of the province road in China, 100 kilometers of the rural highway are built and modified, the construction task is still heavy, a large number of asphalt pavements face reconstruction or major overhaul, about 12% of asphalt pavements need major overhaul or intermediate overhaul every year, the road construction in China is shown to enter a period of construction and maintenance, and the waste asphalt mixture is recycled by adopting a plant-mixing thermal regeneration technology, so that the important significance for saving resources, reducing the road maintenance cost and protecting the ecological environment is achieved.
At present, asphalt regenerants of hot mix plant recycling asphalt mixtures are mainly directly added into a mixing cylinder in the production process, and the mixing procedure is that new and old aggregates and the regenerants are added into the mixing cylinder together and are mixed for 8-12s, and then asphalt, fillers and the like are added and mixed for 35-40 s. According to the mixing process, a large part of asphalt regenerant of the hot plant mix recycled asphalt mixture can be directly sprayed on new aggregates in the production process, a large part of asphalt regenerant can be separated from the new aggregates in the mixing process, only a part of the asphalt regenerant is in contact with waste asphalt pavement materials and is mixed with the old asphalt for regeneration, and the regeneration effect of the old asphalt is greatly reduced. Therefore, according to the existing asphalt regenerant adding process and the hot mix plant recycling asphalt mixture mixing process, the asphalt regenerant cannot be fully exerted in the production process, and the recycled old asphalt cannot reach the recycled asphalt index determined in the laboratory, so that the quality of the hot mix plant recycling asphalt mixture is greatly reduced, and the hot mix plant recycling technology is not beneficial to popularization and application.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a hot regeneration asphalt mixture mix system of plantmix is provided, the loss of its reducible regenerant improves old pitch regeneration effect, promotes the mixture performance.
In order to solve the technical problem, the utility model provides a hot mix plant recycling asphalt mixture mixing system, which comprises an old material heat treatment device for heating waste asphalt mixture;
the conveying device is used for conveying the heated waste asphalt mixture;
the adding device is used for adding a regenerant into the heated waste asphalt mixture;
a storage device for storing new aggregate;
an asphalt adding device for adding new asphalt; and
a mixing device for mixing the waste asphalt mixture, the regenerant, the new aggregate and the new asphalt;
the old material heat treatment device is connected with the mixing device through a conveying device; the adding device is arranged between the old material heat treatment device and the mixing device; so that the regenerant can be added into the waste asphalt mixture after the heat treatment before the waste asphalt mixture enters the mixing device.
As an improvement of the technical scheme, the adding device comprises an induction device for inducing the heated waste asphalt mixture and a spraying device for adding the regenerant.
As an improvement of the technical scheme, the sensing device is an infrared thermometer.
As an improvement of the technical scheme, the adding device comprises a regenerant delivery pipe, a flowmeter, an infrared thermometer and a spraying device, wherein the flowmeter, the infrared thermometer and the spraying device are installed on the regenerant delivery pipe.
As an improvement of the technical scheme, the device also comprises a first metering device for metering the heated waste asphalt mixture; the first metering device is arranged between the old material heat treatment device and the conveying device.
As an improvement of the technical scheme, the device also comprises a second metering device for metering the new aggregate; the second metering device is arranged between the storage device and the mixing device.
As an improvement of the technical scheme, the asphalt mixing machine further comprises a third metering device for metering new asphalt.
As an improvement of the technical scheme, the mixing time of the mixing device is 45-90 s.
Implement the utility model discloses, following beneficial effect has:
1. the utility model arranges the regenerant adding device between the old material heat treatment device and the mixing device; the regenerating agent is added into the waste asphalt mixture after the heat treatment before the waste asphalt mixture enters the mixing device; the loss of the regenerant is reduced, the utilization efficiency of the regenerant is improved, and the overall performance of the mixture is improved.
2. The utility model discloses an infrared thermometer responds to the old and useless bituminous mixture after the thermal treatment, and its response precision is high, can accurately judge the time that the regenerant begins to spray and stops to spray, has reduced the waste of regenerant.
Drawings
Fig. 1 is a schematic diagram of a hot mix plant recycling asphalt mix blending system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an adding device in an embodiment of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the embodiment provides a hot mix plant recycling asphalt mixture mixing system, which includes a used material heat treatment device 1 for heating a used asphalt mixture, a conveying device 2 for conveying the heated used asphalt mixture, an adding device 3 for adding a recycling agent to the heated used asphalt mixture, a storage device 4 for storing new aggregates, an asphalt adding device 5 for adding asphalt, and a mixing device 6; wherein, the old material heat treatment device 1 is connected with the mixing device 6 through the conveying device 2; the storage device 4 and the asphalt adding device 5 are arranged above the mixing device 6; the adding device 2 is arranged between the old material heat treatment device 1 and the mixing device 6; so that the regenerant can be added into the waste asphalt mixture after the heat treatment before the waste asphalt mixture enters the mixing device.
The hot mix plant recycling asphalt mixture mixing system based on the technical characteristics can add the regenerant on the surface of the heated waste asphalt mixture before mixing, so that the regenerant can fully react with the waste asphalt in the waste asphalt mixture, the utilization efficiency of the regenerant is improved, and the overall performance of the recycling asphalt mixture is improved.
Referring to fig. 2, the adding device 3 includes an induction device 31 for induction-heating the waste asphalt mixture, a spraying device 32 for adding the regenerant, a regenerant metering device 33 (not shown in the figure), a regenerant delivery pipe 34, and an on-off valve 35.
Specifically, the sensing device 31 may be an infrared thermometer or a pressure sensor, but is not limited thereto; preferably, in this embodiment, the sensing device 31 is an infrared thermometer, the temperature of the heated waste asphalt mixture reaches 110 to 130 ℃, and when the heated waste asphalt mixture is discharged from the waste heat treatment device 1 to the conveying device 2, the infrared thermometer 21 can rapidly sense the temperature change, and then the on-off valve 35 is opened to start spraying the regenerant.
Specifically, the regenerant metering device 33 may be selected from a flow scale, a static scale, or a flow meter, but is not limited thereto; preferably, in this embodiment, the regenerant metering device is a flow meter, which is convenient to install and facilitates accurate metering of the liquid regenerant.
Specifically, in the present embodiment, the used material heat treatment apparatus 1 is provided with a first valve 11 (not shown in the drawings) for controlling the discharge and storage of the used asphalt material in the used material heat treatment apparatus. A first metering device 12 is arranged between the old material heat treatment device 1 and the conveying device 2; the method is used for weighing the heated waste asphalt mixture. In particular, it is a belt scale, but not limited thereto.
In particular, in this embodiment, the storage means 4 is provided with a second valve 41 (not shown in the figures) for controlling the discharge and storage of new aggregate. A second metering device 42 is arranged between the storage device 4 and the mixing device and is used for weighing the new aggregate; in particular, it is a belt scale, but not limited thereto.
Specifically, in the present embodiment, the asphalt adding device 5 includes a third valve 51 (not shown in the figure) and a third metering device 52, and specifically, the third metering device 52 is a flow meter.
The working process of the plant-mixed hot recycling mixture mixing system in the embodiment is as follows: the waste asphalt mixture is firstly heated to 160 ℃ in the waste heat treatment device 1, then the first valve 11 is opened, the heated waste asphalt mixture is discharged to the first metering device 12, and the waste asphalt mixture is discharged to the conveying device 2 (belt conveyor) after metering; when the heated waste asphalt mixture is conveyed to a specific position, the infrared thermometer 31 obtains a sensing signal, the switch valve 35 is opened, and the regenerant metered by the flowmeter 33 is sprayed onto the surface of the mixture through the spraying device 32. The sprayed waste asphalt mixture is further conveyed to a mixing device 6; the storage device 4 arranged above the mixing device 6 opens the second valve 41, and new aggregate is weighed by the second metering device 42 and then added into the mixing device 6; mixing the two solutions for 5-15 s; then, opening a third valve 51 of an asphalt adding device 5 arranged above the mixing device 6, metering new asphalt by a third metering device, adding the new asphalt into the mixing device 6, and mixing for 35-40 s; thus obtaining the plant-mixed hot recycling mixture.
Further, in order to improve the utilization efficiency of the regenerant. The waste asphalt mixture sprayed with the regenerant can be mixed for 3-6 seconds in a mixing device, and then new aggregate is added and mixed for 5-8 seconds; and finally, adding new asphalt and mixing for 35-40 s.
According to the embodiment, the regenerant can be added before mixing, so that the loss of the regenerant is effectively reduced, the utilization efficiency of the regenerant is improved, and the overall performance of the hot mix plant recycled asphalt mixture is improved. Meanwhile, the infrared thermometer is used for sensing the waste asphalt mixture after the heat treatment, the sensing precision is high, the time for spraying the regenerant to start and the time for stopping spraying the regenerant to stop can be accurately judged, and the waste of the regenerant is reduced.
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 replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (8)
1. A mixing system for plant-mixed hot recycled asphalt mixture is characterized by comprising a used material heat treatment device for heating the waste asphalt mixture;
the conveying device is used for conveying the heated waste asphalt mixture;
the adding device is used for adding a regenerant into the heated waste asphalt mixture;
a storage device for storing new aggregate;
an asphalt adding device for adding new asphalt; and
a mixing device for mixing the waste asphalt mixture, the regenerant, the new aggregate and the new asphalt;
the old material heat treatment device is connected with the mixing device through a conveying device; the adding device is arranged between the old material heat treatment device and the mixing device; so that the regenerant can be added into the waste asphalt mixture after the heat treatment before the waste asphalt mixture enters the mixing device.
2. The mix plant hot recycled asphalt mix blending system of claim 1, wherein said adding means comprises induction means for inductively heating the post-consumer waste asphalt mix and spraying means for adding a regenerant.
3. The mix system of hot mix plant recycled asphalt of claim 2, wherein said sensing device is an infrared thermometer.
4. The mix system of hot mix plant recycled asphalt of claim 1, wherein said adding means comprises a regenerant delivery pipe, a flow meter mounted on said regenerant delivery pipe, an infrared thermometer, and a spraying device.
5. The mix system of hot mix plant recycled asphalt of claim 1, further comprising a first metering device for metering the heated spent asphalt mix; the first metering device is arranged between the old material heat treatment device and the conveying device.
6. The mix plant hot recycled asphalt mix blending system of claim 1, further comprising a second metering device for metering new aggregate; the second metering device is arranged between the storage device and the mixing device.
7. The mix plant hot recycled asphalt mixing system of claim 1, further comprising a third metering device for metering new asphalt.
8. The mix plant hot recycled asphalt mix blending system of claim 1, wherein the blending time of said blending device is 45-90 s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020399076.7U CN212688622U (en) | 2020-03-25 | 2020-03-25 | Hot mix plant recycling asphalt mixture mixing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020399076.7U CN212688622U (en) | 2020-03-25 | 2020-03-25 | Hot mix plant recycling asphalt mixture mixing system |
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| CN212688622U true CN212688622U (en) | 2021-03-12 |
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| CN202020399076.7U Active CN212688622U (en) | 2020-03-25 | 2020-03-25 | Hot mix plant recycling asphalt mixture mixing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114411487A (en) * | 2022-01-25 | 2022-04-29 | 平山县畅通公路养护工程有限公司 | Environment-friendly mixing device for asphalt road paving material |
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2020
- 2020-03-25 CN CN202020399076.7U patent/CN212688622U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114411487A (en) * | 2022-01-25 | 2022-04-29 | 平山县畅通公路养护工程有限公司 | Environment-friendly mixing device for asphalt road paving material |
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