Multi-stage separation device for asphalt pavement milling materials

Abstract

The utility model provides a multi-stage separation device for asphalt pavement milling materials. The multi-stage separation device comprises a separator, the lower portion of the separator is connected with a winnowing device, a winnowing cavity is formed in the winnowing device, a turbofan is arranged on the left side of the winnowing cavity, and a dust collection outlet is formed in the right side of the winnowing cavity. The bottom of the winnowing device is connected with a magnetic separation device, a magnetic separation cavity is formed in the magnetic separation device, a rotatable magnetic separation roller is arranged in the magnetic separation cavity, a translation driving device and a wiping plate are arranged in the magnetic separation cavity, and a magnetic impurity outlet is formed in the right side of the magnetic separation cavity; the bottom of the magnetic separation device is connected with an asphalt fine aggregate screener, a plurality of fine aggregate screens are arranged in the asphalt fine aggregate screener, and the fine aggregate screens are sequentially arranged in the vertical direction; and a fine aggregate recovery channel is arranged below each fine aggregate screen. By adopting the synergistic effect of the winnowing device, the magnetic separation device and the asphalt fine aggregate screener, multi-stage fine separation of milling materials is realized, various impurities are efficiently removed, and the resource utilization rate is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to road surface material regeneration technical field, concretely relates to a kind of asphalt pavement milling material multistage separating device. BACKGROUND

[0002] With the development of highway construction and maintenance technology, old asphalt pavement milling recycling has become an important measure to improve road maintenance efficiency, reduce engineering cost and reduce environmental pollution. The traditional milling material recycling mode mainly includes direct backfilling, hot recycling and cold recycling, etc., but in practical application, due to the uneven particle size of the milling material, the presence of metal impurities and high dust content, the quality of the recycled aggregate is reduced, which affects the quality of the newly paved asphalt mixture. Therefore, improving the screening accuracy of asphalt milling material, effectively removing impurities and optimizing the particle size distribution have become key problems to be solved in the field of asphalt pavement recycling.

[0003] At present, common asphalt milling material processing equipment is mainly single screening equipment or simple magnetic separation device, which cannot simultaneously separate different particle size aggregates and remove impurities. For example: traditional vibrating screen is mainly used for coarse screening, but cannot effectively separate fine particles, and is easy to cause dust flying. Single-stage magnetic separator can remove most of the ferromagnetic impurities, but has no effect on non-magnetic impurities. Ordinary air separator is easily affected by material moisture content and particle shape, resulting in unstable separation effect.

[0004] In view of the above problems, the utility model provides a kind of asphalt pavement milling material multistage separating device, integrates screening device, magnetic separation device and air separation system, realizes the fine screening of different particle size milling material through reasonable structure design and optimized process flow, removes magnetic impurities and light impurities at the same time, improves the quality of recycled aggregate, so that it can be better applied to the production of recycled asphalt mixture. SUMMARY

[0005] The utility model aims at providing a kind of asphalt pavement milling material multistage separating device, improves the separation efficiency of asphalt pavement recycling material, so that it can be better applied to the production of recycled asphalt mixture.

[0006] To achieve the above purpose, the technical scheme provides asphalt pavement milling material multistage separating device, including separator, separator upper portion is provided with separating agent inlet, separator is provided with coarse screen mesh in; separator lower portion is connected with air separation device, air separation device is provided with air separation cavity, air separation cavity is arranged with flow guide piece inside, the left side of air separation cavity is provided with turbine air blower, the right side of air separation cavity is provided with dust collection outlet;

[0007] The bottom of the air separation device is connected with the magnetic separation device, a magnetic separation cavity is arranged in the magnetic separation device, a rotatable magnetic separation cylinder is arranged in the magnetic separation cavity, a translation driving device and a wiping plate are arranged in the magnetic separation cavity, the translation driving device is connected with the wiping plate, the wiping plate is driven to move towards the axial direction of the magnetic separation cylinder through the translation driving device, and a magnetic impurity outlet is arranged at the right side of the magnetic separation cavity;

[0008] The bottom of the magnetic separation device is connected with the asphalt fine aggregate screener, a plurality of fine aggregate screens are arranged in the asphalt fine aggregate screener, and the fine aggregate screens are sequentially arranged along the vertical direction; a fine aggregate recovery channel is arranged below each fine aggregate screen, and the fine aggregate recovery channel is located at one side of the fine aggregate screen; and a vibrator is arranged on the fine aggregate screen.

[0009] As preferred, the separator is connected with the dust removal machine, and the dust removal machine is provided with a fan.

[0010] As preferred, a baffle is arranged at the right side of the air separation cavity, the baffle is arranged at the bottom of the air separation cavity in an inclined manner, and the dust collection outlet is located above the baffle.

[0011] As preferred, the turbo fan is provided with a wind speed control knob, and the wind speed of the turbo fan is controlled through the wind speed control knob.

[0012] As preferred, the fine aggregate screen is arranged in an inclined manner, and one side of the fine aggregate screen close to the fine aggregate recovery channel is lower than the other side.

[0013] As preferred, the utility model further comprises a raw material bin, a feeding conveyor belt is arranged at the right side of the raw material bin, and the feeding conveyor belt is used for conveying materials into the separator.

[0014] As preferred, from top to bottom, the pore size of the screen hole of the fine aggregate screen gradually decreases.

[0015] Compared with the prior art, the technical scheme has the following characteristics and beneficial effects:

[0016] 1. The raw material bin and the feeding conveyor belt are matched, so that the asphalt milling material is continuously and uniformly conveyed, and the material supply is stable when the material enters the separation system. The coarse screen is arranged below the separator, the milling material can be preliminarily screened, the large block material and the small particle are effectively separated, the working efficiency of subsequent air separation, magnetic separation and screening is improved, and the risk of system blockage is reduced.

[0017] 2. The air separation device, the magnetic separation device and the screening device are cooperated, so that the multi-stage fine separation of the milling material is realized, various impurities are efficiently removed, the aggregate with different particle sizes is finely separated, the recycled aggregate meets different road construction requirements, and the resource utilization rate is improved.

[0018] 3. The utility model discloses a dust removal machine is utilized to the dust that separates the separating machine separation process to produce efficient purification, can effectively reduce the dust emission, reduce the pollution to surrounding environment simultaneously, effectively improve the recycling rate of pitch milling material, ensure the environmental protection sustainability of pitch pavement recycling. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the schematic diagram of asphalt mixture primary screening device.

[0020] Figure 2 It is the schematic diagram of asphalt mixture winnowing device and magnetic separation device.

[0021] Figure 3 It is the schematic diagram of asphalt mixture fine screening device

[0022] In the drawing: 1, raw material warehouse;2, feeding conveyor belt;3, separating machine;4, separating agent entrance;5, fan;6, dust removal machine;7, pitch coarse aggregate outlet;8, coarse screen mesh;9, driving motor;10, rubbing plate;11, magnetic separation cylinder;12, wind speed control knob;13, turbine blower;14, flow guide;15, dust collection outlet;16, baffle;17, magnetic impurity outlet;18, vibrator;19, fine aggregate screen mesh;20, pitch fine aggregate sizer;21, pitch fine aggregate recycling channel;22, pitch fine aggregate collection tank. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art belong to the scope of protection of the present application.

[0024] Those skilled in the art should understand that in the disclosure of the present application, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the above terms cannot be understood as a limitation of the present application.

[0025] This solution provides a multi-stage separation device for milled asphalt pavement materials, which achieves efficient screening, dust removal, impurity removal, and fine aggregate recovery of the milled materials, effectively improving the quality of recycled aggregates. The multi-stage separation device for milled asphalt pavement materials includes a raw material silo 1, a feeding conveyor belt 2, a separator 3, a dust collector 6, a coarse screen 8, a translation drive device 9, a magnetic separator drum 11, a turbine fan 13, a flow guide 14, a polarizing block 18, a fine aggregate screen 19, an asphalt fine aggregate screener 20, and an asphalt fine aggregate collection tank 22. The raw material silo 1 is located on the left side and stores the milled materials to be processed. The feeding conveyor belt 2 is set on the right side of the raw material silo 1, which transports the materials to the separator 3. The separator 3 has a separating agent inlet 4 at its upper part and a coarse screen 8 at its bottom. The coarse screen 8 screens the material, separating it into coarse aggregate and fine aggregate. The coarse aggregate in the asphalt mixture is separated out at the coarse screen 8, while the fine aggregate is discharged through the lower pipe and undergoes further screening. The separator 3 is connected to a dust collector 6, which is located on the right side of the separator 3. The dust collector 6 is equipped with a fan 5. The dust collector 6 generates negative pressure through the fan 5 and draws in the dust from the separator 3, collecting the dust.

[0026] The lower part of the separator 3 is connected to an air classifier, which contains an air classifier chamber. Inside the air classifier chamber are guide vanes 14. A turbine fan 13 is located on the left side of the air classifier chamber, and a wind speed control knob 12 is installed on the turbine fan 13 to control the wind speed. A baffle 16 and a dust collection outlet 15 are located on the right side of the air classifier chamber. The baffle 16 is inclined at the bottom of the air classifier chamber, and the dust collection outlet 15 is located above the baffle 16.

[0027] The bottom of the air separator is connected to a magnetic separator, which contains a magnetic separation chamber. A rotatable magnetic separator drum 11 is arranged within the magnetic separation chamber. A translation drive device 9 and a wiping plate 10 are also located within the magnetic separation chamber. The translation drive device is connected to the wiping plate 10 and drives the wiping plate 10 to move axially toward the magnetic separator drum 11. When the translation drive device drives the wiping plate 10 to move axially toward the magnetic separator drum 11, the wiping plate 10 contacts the surface of the magnetic separator drum 11, scraping off the magnetic impurities adsorbed on the surface of the magnetic separator drum 11. A magnetic impurity outlet 17 is located on the right side of the magnetic separation chamber.

[0028] The magnetic separator is connected to an asphalt fine aggregate screen 20 at its bottom. The screen 20 contains multiple fine aggregate screens 19 of different particle sizes, arranged vertically in sequence. From top to bottom, the aperture size of the screens gradually decreases. Each fine aggregate screen 19 has a fine aggregate recovery channel 21 located below it, situated on one side of each screen. The screens 19 are inclined, with the side closer to the recovery channel 21 lower than the other side. A vibrator 18 is installed on each screen 19, causing it to vibrate. Fine aggregates of different particle sizes enter the asphalt fine aggregate recovery tank 22 through the respective recovery channels 21, thus completing the recovery process.

[0029] Specifically, the air separator's guide component 14 adopts a streamlined structure, which reduces airflow turbulence and improves air separation accuracy. The magnetic separator drum 11 has a wear-resistant layer on its surface, which improves durability and extends service life. The asphalt fine aggregate screen 20 uses multi-layer adjustable screens, and the screen aperture size can be changed according to different needs to adapt to the sorting requirements of different specifications of milled materials. The dust collector 6 adopts a two-stage filtration system, which can improve dust collection efficiency and reduce environmental pollution.

[0030] The separation operation steps using a multi-stage separation device for asphalt pavement milling materials are as follows:

[0031] Asphalt milling aggregate enters the feeding conveyor belt 2 from the raw material silo 1 and is conveyed to the separator 3 for preliminary separation. The coarse screen 8 inside the separator 3 filters out the coarse asphalt aggregate, which is collected from the coarse asphalt aggregate outlet 7 on the right side of the separator 3. The fine asphalt aggregate undergoes further screening through the lower channel. The dust collector 6 uses a fan 5 to remove dust from the separator.

[0032] Asphalt fine aggregate enters the air classifier. The turbine blower 13 on the right side of the air classifier changes the airflow through the wind speed control knob 12. The asphalt fine aggregate dust is blown by the turbine blower 13 towards the dust collection outlet 15 on the right side. A baffle 16 is arranged below the dust collection outlet 15 to prevent asphalt fine aggregate from entering the dust collection outlet. After being air-classified, the asphalt fine aggregate enters the magnetic separator. The magnetic separator drum 11 adsorbs magnetic substances in the asphalt fine aggregate. After the magnetic separator drum 11 has been working for a period of time, the translation drive device 9 drives the wiping plate 10 to wipe away the magnetic substances adsorbed on the magnetic separator drum 11. The magnetic impurities that have been wiped off are discharged through the magnetic impurity outlet 17. After passing through the magnetic separation system, the asphalt fine aggregate enters the asphalt fine aggregate screen 20. The asphalt fine aggregate screen 20 contains multiple fine aggregate screens 19, which can screen fine aggregates of different particle sizes step by step. A vibrator 18 installed on the fine aggregate screen 19 applies vibration to the fine aggregate screen 19, which fully disperses the material particles on the fine aggregate screen 19 and improves the screening accuracy. The screened aggregate enters different fine aggregate recycling channels 21 according to the particle size, and is finally stored in the fine aggregate collection tank 22.

[0033] The parts not described in detail in this application are prior art, and therefore are not described in detail in this application.

[0034] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0035] Although this document uses a significant amount of technical terminology, the possibility of using other terms is not excluded. These terms are used merely to facilitate the description and explanation of the nature of this application; interpreting them as any additional limitation would be contrary to the spirit of this application.

[0036] This application is not limited to the above-described preferred embodiments. Anyone can derive other products in various forms under the guidance of this application. However, regardless of any changes made to their shape or structure, any technical solution that is the same as or similar to that of this application falls within the protection scope of this application.

Claims

1. A multi-stage separation device for asphalt pavement milling material, characterized in that, It includes a separator (3), a separator inlet (4) is provided at the top of the separator (3), and a coarse screen (8) is provided inside the separator (3); the lower part of the separator (3) is connected to an air classifier, an air classifier chamber is provided inside the air classifier chamber, a guide (14) is arranged inside the air classifier chamber, a turbine fan (13) is provided on the left side of the air classifier chamber, and a dust collection outlet (15) is provided on the right side of the air classifier chamber; The bottom of the air separation device is connected to the magnetic separation device. The magnetic separation device is equipped with a magnetic separation chamber. A rotatable magnetic separation drum (11) is arranged in the magnetic separation chamber. A translation drive device (9) and a wiping plate (10) are arranged in the magnetic separation chamber. The translation drive device is connected to the wiping plate (10). The wiping plate (10) is driven to move axially toward the magnetic separation drum (11) by the translation drive device. A magnetic impurity outlet (17) is provided on the right side of the magnetic separation chamber. The bottom of the magnetic separator is connected to an asphalt fine aggregate screen (20). The asphalt fine aggregate screen (20) is equipped with several fine aggregate screens (19), which are arranged in sequence along the vertical direction. Each fine aggregate screen (19) is provided with a fine aggregate recovery channel (21) below it, which is located on one side of the fine aggregate screen (19). A vibrator (18) is provided on the fine aggregate screen (19).

2. The multi-stage separation device for asphalt pavement milling material according to claim 1, characterized in that, The separator (3) is connected to the dust collector (6), and the dust collector (6) is equipped with a fan (5).

3. The multi-stage separation device for asphalt pavement milling material according to claim 1, characterized in that, A baffle (16) is provided on the right side of the air separation chamber. The baffle (16) is arranged at an angle at the bottom of the air separation chamber, and the dust collection outlet (15) is located above the baffle (16).

4. The multi-stage separation device for asphalt pavement milling material according to claim 1, characterized in that, The turbine fan (13) is equipped with a wind speed control knob (12), and the wind speed of the turbine fan is controlled by the wind speed control knob (12).

5. The multi-stage separation device for asphalt pavement milling material according to claim 1, characterized in that, The fine aggregate screen (19) is set at an angle, with the side of the fine aggregate screen (19) closer to the fine aggregate recycling channel (21) lower than the other side.

6. The multi-stage separation device for asphalt pavement milling material according to claim 1, characterized in that, It also includes a raw material silo (1), and a feeding conveyor belt (2) is set on the right side of the raw material silo (1) to transport the material to the separator (3).

7. The multi-stage separation device for asphalt pavement milling material according to claim 1, characterized in that, From top to bottom, the aperture of the fine aggregate screen (19) gradually decreases.

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