An environmentally friendly asphalt concrete cold material feeding mechanism

Abstract

The present application relates to an environmentally friendly feeding mechanism for cold material of asphalt concrete, and relates to the technical field of asphalt concrete production equipment, which includes a mixing box arranged in a closed space, a plurality of cold material bins surrounding the mixing box, and a discharge port of the cold material bin arranged on the upper side of the mixing box; an air inlet is present on the closed space; a discharge port connected to the inside of the mixing box is fixedly connected to the lower side of the mixing box, a hoist is installed on the discharge port, and the mixing box is connected to a heating drum through the hoist; the feeding mechanism also includes an exhaust fan for extracting dust in the closed space. The present application has the effect of reducing dust generated when cold material is added to the heating drum.

Description

Technical Field

[0001] The present application relates to the technical field of asphalt concrete production equipment, and in particular to an environmentally friendly cold material feeding mechanism for asphalt concrete. Background Art

[0002] At present, in the process of asphalt concrete production, hot materials (asphalt raw materials) and cold materials (sand and gravel, etc.) need to be mixed in a mixing drum. In order to prevent the asphalt raw materials and cold materials from being mixed and melted unevenly in the mixing drum, which affects the viscosity of the asphalt, the cold materials are generally heated in a heating drum before being mixed with the hot materials.

[0003] In the process of adding cold material, the cold material is generally placed in the cold material bin first, one type of cold material is placed in one cold material bin. Then multiple cold material bins are arranged side by side, and a conical bucket is set at the bottom of each cold material bin to facilitate the discharge of the cold material in the cold material bin, and a feeder is set at the bottom of the conical bucket to discharge the cold material from the cold material bin.

[0004] A plurality of cold material bins are arranged in a straight line, and a conveyor belt is provided at the lower side of the cold material bin, so that the cold material discharged from the cold material bin can fall on the conveyor belt and be transported to the heating roller via the conveyor belt.

[0005] Among them, when the cold material in the cold material bin falls on the conveyor belt, due to the height difference, serious dust will be generated on the conveyor belt. Moreover, since multiple cold material bins are arranged in a straight line, the length of the entire conveyor belt is dozens of meters. In the prior art, multiple cold material bins are generally covered with buildings to prevent the generated dust from spreading to the outside. However, there will still be a large amount of dust raised inside the building and materials will be scattered on the ground, affecting the staff in the building. Summary of the invention

[0006] In order to reduce dust when adding cold material, the present application provides an environmentally friendly asphalt concrete cold material feeding mechanism.

[0007] The asphalt concrete cold material environmentally friendly feeding mechanism provided in this application adopts the following technical solution:

[0008] An environmentally friendly asphalt concrete cold material feeding mechanism comprises a mixing box arranged in a closed space, a plurality of cold material bins surrounding the mixing box, and a discharge port of the cold material bin is arranged on the upper side of the mixing box; an air inlet is provided on the closed space;

[0009] The lower side of the mixing box is fixedly connected with a discharge port communicating with the interior of the mixing box, a hoist is installed on the discharge port, and the mixing box is connected to the heating drum via the hoist; the feeding mechanism also includes an exhaust fan for extracting dust in the closed space.

[0010] By adopting the above technical scheme, several cold material bins are arranged around the mixing box, so that the cold material in the cold material bin falls directly into the mixing box. Instead of using a conveyor belt, a closed elevator is used, and an exhaust fan is used to extract the air and dust in the closed space, thereby generating negative pressure in the closed space. The generated dust directly enters the exhaust fan and then enters the dust processor through the exhaust fan, thereby collecting and processing the dust generated during the transportation of the cold material, eliminating the generation of cold material dust during transportation, and using a closed space to reduce the exposure of the cold material, making it easier for the exhaust fan to extract the dust.

[0011] Preferably, the enclosed space includes a receiving pit dug on the ground and a protective cover covering the receiving pit; a protective door is installed on the protective cover.

[0012] By adopting the above technical solution, it is easier for workers to arrange the enclosed space, and the workers can also enter the holding pit through the protective door to perform maintenance on equipment such as the cold material silo.

[0013] Preferably, the cold material bin passes through the protective cover, and the feed port of the cold material bin is arranged on the outside of the protective cover.

[0014] By adopting the above technical solution, the staff can add cold material into the cold material bin from the outside without having to drive into the protective cover, thereby making it more convenient for the staff to add cold material into the cold material bin.

[0015] Preferably, a plurality of cold material bins are arranged in a ring or arc shape around the mixing box.

[0016] Preferably, the exhaust fan is arranged at the outlet end of the elevator.

[0017] By adopting the above technical solution, the outlet end of the elevator is connected to the inside of the heating drum, so that when the exhaust fan extracts dust, it can extract the dust in the mixing box and the elevator, and also extract the dust generated in the heating drum.

[0018] Preferably, the mixing box is covered with a cover plate, and a plurality of through holes are opened on the cover plate. A feeder is installed at the discharge port of the cold material bin, and the feeder corresponds to the through holes one by one, and the feeder is arranged on the upper side of the through holes with a gap between the through holes.

[0019] By adopting the above technical solution, under the action of the cover plate, the leakage of dust in the mixing box is reduced, and the size of the mixing box inlet is reduced while reducing dust. In addition, there is a gap between the feeder and the through hole, which can facilitate the air in the pit to enter the mixing box.

[0020] Preferably, the feeder is provided with a dust cover which covers the feeder and the cold material bin discharge cover, the dust cover is buckled on the through hole, and the dust cover is connected to the outside world away from the through hole.

[0021] By adopting the above technical solution, the exhaust fan can exhaust air through the through hole to the feeder and the cold material bin outlet inside the dust cover when extracting dust, and extract the slight dust generated by the cold material bin outlet falling on the feeder.

[0022] Preferably, when a plurality of the cold material bins are arranged around the mixing box, the feed openings on the cold material bins are arranged toward the outside of the cold material bins in the surrounding direction.

[0023] By adopting the above technical solution, it is convenient for workers to add cold materials into the mixing box, and the interference between adjacent cold material bins when adding materials is reduced.

[0024] Preferably, a rolling door is installed on the cold material bin.

[0025] By adopting the above technical solution, it is convenient for the staff to close the feed port of the cold material bin and reduce the exposure of the cold material in the cold material bin.

[0026] Preferably, the outlet end of the elevator is sealedly connected to the heating drum.

[0027] By adopting the above technical solution, when the exhaust fan extracts dust, the extracted air is all from the mixing box and the heating drum.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. By setting up a feeding mechanism, instead of using a conveyor belt, the dust generated during the transportation of cold materials is extracted and collected to reduce the leakage of dust during the transportation of cold materials;

[0030] 2. By extracting the dust in the heating drum, the dust extraction effect is further improved;

[0031] 3. By setting up a closed space, the normal amount of air extracted during dust extraction can be reduced, thereby improving the efficiency of dust extraction. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a partial schematic diagram of the feeding mechanism on the ground in this embodiment;

[0033] Figure 2 It is a partial schematic diagram of the loading mechanism accommodating pit in this embodiment.

[0034] Explanation of the accompanying reference numerals: 1. Receiving pit; 2. Protective cover; 3. Cold material bin; 4. Feeder; 5. Mixing box; 6. Cover plate; 7. Through hole; 8. Rolling door; 9. Discharge port; 10. Elevator; 11. Heating drum; 12. Exhaust fan; 13. Dust cover. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-2 This application is described in further detail.

[0036] The embodiment of the present application discloses an environmentally friendly asphalt concrete cold material feeding mechanism.

[0037] Reference Figure 1 , Figure 2 , an environmentally friendly feeding mechanism for cold asphalt concrete, a receiving pit 1 is dug on the ground, and a protective cover 2 is provided on the receiving pit 1, and the protective cover 2 is mainly composed of transparent glass and a non-transparent guard plate spliced ​​and fixed with a steel frame. Among them, an entrance for workers to enter the receiving pit 1 is reserved on the protective cover 2, and a protective door is installed at the entrance. Workers can enter the receiving pit 1 through the protective cover 2 by opening the protective door.

[0038] Several cold material bins 3 are placed in the storage pit 1, and a feeder 4 is installed at the discharge port of the cold material bin 3. The feeder 4 is in the form of a conveyor belt, and when the feeder 4 is started, it drives the cold material stored in the cold material bin 3 to be discharged. The feeder 4 is arranged at the discharge port of the cold material bin 3, and acts as a switch to control the discharge of the cold material in the cold material bin 3.

[0039] A mixing box 5 is installed in the receiving pit 1. The mixing box 5 is arranged at the bottom of the receiving pit 1 and is located at the lower side of the cold material bin 3. A cover plate 6 is provided on the mixing box 5. A plurality of through holes 7 are opened on the cover plate 6.

[0040] Among them, when several cold material bins 3 are in the containing pit 1, they are arranged around the mixing box 5 and around the mixing box 5. When several cold material bins 3 are surrounded by the mixing box 5, they can be surrounded in a ring shape or in an arc shape.

[0041] When several cold material bins 3 are arranged around the mixing box 5, the edge of the feeder 4 is arranged on the upper side of the through hole 7, so that when the feeder 4 is started, the cold material in the cold material bin 3 can be guided to be discharged and transmitted to the through hole 7 through the feeder 4, and then enter the mixing box 5 through the through hole 7.

[0042] Moreover, the feed port of the cold material bin 3 is arranged outside the receiving pit 1 and the protective cover 2. After the protective cover 2 is placed on the receiving pit 1, the protective cover 2 covers the feeder 4 and the mixing box 5, and exposes the feed port of the cold material bin 3. When several cold material bins 3 are surrounded in a ring shape, the feed port on the cold material bin 3 is arranged outside the ring. In addition, a rolling door 8 for closing the feed port is installed on the cold material bin 3. When working, the rolling door 8 is pulled open to close the feed port.

[0043] A discharge port 9 is fixedly connected to the lower side of the mixing box 5 . The discharge port 9 is communicated with the interior of the mixing box 5 . The cold material entering the mixing box 5 can be discharged through the discharge port 9 .

[0044] The receiving pit 1 is also provided with an elevator 10, which is a bucket elevator 10. The inlet end of the elevator 10 is fixedly connected to the discharge port 9, and the outlet end of the elevator 10 is directly connected to the heating drum 11. The heating drum 11 is mainly used to heat the cold material, and a burner head for heating the cold material in the heating drum 11 is installed on the heating drum 11. The port at the outlet end of the elevator 10 is directly fixedly connected to the heating drum 11, so that the inside of the heating drum 11 is directly connected to the inside of the elevator 10, and the connection is kept sealed. Specifically, the material in the cold material bin 3 enters the mixing box through the feeder 4, and enters the elevator 10 through the mixing box. The elevator 10 transports the material to the heating drum 11, and the cold material is heated in the heating drum 11. After heating, it is discharged from the heating drum 11 and mixed with the heated asphalt liquid to complete the production of asphalt concrete. After the cold material is heated and mixed with the asphalt liquid, the temperature of the asphalt will not be reduced during mixing. In addition, in the process of conveying the cold material to the heating drum 11, the cold material directly falls into the mixing box 5 and is directly conveyed to the heating drum 11 via the elevator 10. Since the mixing box 5 is arranged in the receiving pit 1 and a protective cover 2 is provided on the receiving pit 1, the conveyor belt is not used directly, and a closed space is used to convey the cold material to the heating drum 11, the generation of dust can be reduced.

[0045] When the elevator 10 is arranged, the outlet end passes through the protective cover 2 and the receiving pit 1 , and the heating drum 11 is arranged outside the receiving pit 1 .

[0046] In order to further eliminate the dust in the storage pit 1, an exhaust fan 12 is installed on the elevator 10. The exhaust fan 12 is installed at the outlet end of the elevator 10. A dust exhaust pipe is installed on the exhaust fan 12, and the dust exhaust pipe is connected to the dust processor. When transporting cold materials, the staff turns on the exhaust fan 12, and the exhaust fan 12 is connected to the inside of the mixing box 5 through the elevator 10, so that the exhaust fan 12 continuously extracts the air inside the mixing box 5, so that the air pressure produces a negative pressure in the mixing box 5. When the cold material falls into the mixing box 5 and raises dust, the exhaust fan 12 can extract the dust. Among them, a cover plate 6 is provided, and a through hole 7 is opened on the cover plate 6, which can not only reduce the caliber of the mixing box 5 and reduce the leakage of dust during dust, but also enable a channel for air to enter the mixing box 5 between the discharge port of the cold material bin 3 and the mixing box 5, thereby facilitating the extraction of dust.

[0047] In addition, the exhaust fan 12 is arranged at the outlet end of the elevator 10, close to the cold material drum, so that when the exhaust fan 12 extracts dust, it can also extract the dust generated when the cold material in the heating drum 11 is heated, thereby eliminating the dust in the heating drum 11 and preventing dust leakage when the heated cold material is discharged.

[0048] On the heating drum 11, the arrangement position of the burner head and the connection position between the lifting machine 10 and the heating drum 11 are located at the two ends of the heating drum 11. When the cold material is heated, as the exhaust fan 12 extracts the dust, the high-temperature gas in the heating drum 11 can also produce a flowing effect, thereby filling the entire internal space of the heating drum 11.

[0049] An air inlet is reserved on the protective cover 2 to facilitate the entry of external gas into the protective cover 2 .

[0050] In actual use, when the cold material falls on the feeder 4, slight dust will be generated. In order to further improve the dust removal effect, a dust cover 13 is provided on the feeder 4. The dust cover 13 is fixedly connected to the cold material bin 3 and the cover plate 6 to cover the connection between the feeder 4 and the cold material bin 3. The dust cover 13 is provided on the through hole 7, and the side of the dust cover 13 away from the through hole 7 is connected to the outside. When the exhaust fan 12 is started, the exhaust fan 12 can exhaust air from the connection between the cold material bin 3 and the feeder 4 covered by the dust cover 13 through the elevator 10, the mixing box 5 and the through hole 7 to generate negative pressure, so that the dust generated at the discharge port of the cold material bin 3 can also be easily extracted.

[0051] The implementation principle of an environmentally friendly asphalt concrete cold material feeding mechanism in an embodiment of the present application is: a plurality of cold material bins 3 are arranged around a mixing box 5, and the cold material in the cold material bins 3 is allowed to fall directly into the mixing box 5, without using a conveyor belt, and a closed elevator 10 is used to reduce the exposure of the cold material during transportation, thereby reducing the generation of dust.

[0052] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An environmentally friendly asphalt concrete cold material feeding mechanism, characterized by: It comprises a mixing box (5) arranged in a closed space, a plurality of cold material bins (3) surrounding the mixing box (5), and the discharge ports of the cold material bins (3) are arranged on the upper side of the mixing box (5); A discharge port (9) communicating with the interior of the mixing box (5) is fixedly connected to the lower side of the mixing box (5); a hoist (10) is installed on the discharge port (9); the mixing box (5) is connected to the heating drum (11) via the hoist (10); the feeding mechanism also includes an exhaust fan (12) for extracting dust in the closed space; The enclosed space comprises a receiving pit (1) dug under the ground and a protective cover (2) covered on the receiving pit (1); a protective door is installed on the protective cover (2); the outlet end of the elevator (10) is sealedly connected to the heating drum (11); the upper cover of the mixing box (5) is provided with a cover plate (6); the exhaust fan (12) is arranged at the outlet end of the elevator (10); a dust exhaust pipe is installed on the exhaust fan (12), and the dust exhaust pipe is connected to the dust processor; the exhaust fan (12) is connected to the inside of the mixing box (5) through the elevator (10), so that the exhaust fan (12) continuously extracts air from the inside of the mixing box (5), so that the air pressure generates a negative pressure in the mixing box (5).

2. The asphalt concrete cold material environmentally friendly feeding mechanism according to claim 1 is characterized by: The cold material bin (3) passes through the protective cover (2), and the feed port of the cold material bin (3) is arranged on the outside of the protective cover (2).

3. The asphalt concrete cold material environmentally friendly feeding mechanism according to claim 1 is characterized by: A plurality of cold material bins (3) are arranged in a ring shape or an arc shape around the mixing box (5).

4. The asphalt concrete cold material environmentally friendly feeding mechanism according to claim 1 is characterized by: The cover plate (6) is provided with a plurality of through holes (7), and a feeder (4) is installed at the discharge port of the cold material bin (3), the feeder (4) corresponds to the through holes (7) one by one, and the feeder (4) is arranged on the upper side of the through holes (7) with a gap between the feeder (4) and the through holes (7).

5. The asphalt concrete cold material environmentally friendly feeding mechanism according to claim 4 is characterized by: The feeder (4) is provided with a dust cover (13) for covering the feeder (4) and the cold material bin (3) discharge cover. The dust cover (13) is buckled on the through hole (7), and the side of the dust cover (13) away from the through hole (7) is connected to the outside.

6. The asphalt concrete cold material environmentally friendly feeding mechanism according to claim 1 is characterized by: When a plurality of the cold material bins (3) surround the mixing box (5), the feed openings on the cold material bins (3) are arranged in a direction facing the outside of the cold material bins (3) in a surrounding direction.

7. The asphalt concrete cold material environmentally friendly feeding mechanism according to claim 1 is characterized by: The cold material bin (3) is provided with a rolling door (8).

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