Aggregate pretreatment device for asphalt mixing plant

Abstract

This utility model relates to the field of aggregate production technology, and in particular to an aggregate pretreatment device for an asphalt mixing plant. It includes a conveying channel, with a feed hopper mounted on the upper surface of one end of the conveying channel. A rotating shaft is horizontally rotatably mounted inside the conveying channel, and an auger blade is fixedly sleeved on the rotating shaft. A drive motor is fixedly mounted at one end of the conveying channel, and one end of the output shaft of the drive motor is fixedly connected to one end of the auger blade. A rectangular cover is mounted on the conveying channel, forming a cavity between the rectangular cover and the conveying channel. The rectangular cover is equipped with a drying component for supplying hot air into the conveying channel. This utility model utilizes multiple air inlets to evenly supply hot air into the cavity formed by the rectangular cover and the conveying channel. The hot air can fully contact the surface and interior of the aggregate as it tumbles, preventing the hot air from only acting on the surface layer of aggregate, thus ensuring uniform drying of the aggregate and guaranteeing its subsequent performance.

Description

Technical Field

[0001] This utility model relates to the field of aggregate production technology, and in particular to an aggregate pretreatment device for asphalt mixing plants. Background Technology

[0002] Aggregates, also known as aggregates, are granular materials that serve as the skeleton and filler in concrete and mortar. There are two types: fine aggregates and coarse aggregates. Fine aggregate particles are generally made of natural sand, such as river sand, sea sand, and valley sand. When natural sand is scarce, artificial sand made from crushed hard rock can also be used. Common coarse aggregate particles include crushed stone and pebbles. Under the same conditions, crushed stone concrete has a higher strength than pebble concrete, but crushed stone is made from crushed rock and is more expensive than pebble concrete. Common coarse aggregates used in lightweight aggregate concrete include natural porous rocks such as pumice and artificial porous aggregates such as expanded clay and expanded slag.

[0003] Chinese patent CN222406490U discloses a pre-treatment device for aggregates in a mixing plant. Through the arrangement of a funnel, a processing box, a controller, a first motor, a second motor, a fifth motor, a first gear, a first crushing gear, a second crushing gear, a screen, a cam, a first connecting rod, a slider, a conveyor belt, and a conveyor, the pre-treatment device for aggregates in a mixing plant can crush and screen aggregates and recycle unqualified aggregates.

[0004] In the aforementioned patent documents, aggregates tend to accumulate and form a thick layer during transportation. Hot air can only act on the surface aggregates, while the aggregates inside the layer are blocked and have difficulty fully contacting the hot air, easily forming an uneven state of "dry outside and wet inside", which affects the subsequent performance of the aggregates. Utility Model Content

[0005] The purpose of this invention is to address the following shortcomings in the existing technology: aggregates tend to accumulate and form a thick layer during transportation, and hot air can only act on the surface aggregates, while the aggregates inside the layer are blocked and have difficulty fully contacting the hot air, easily forming an uneven state of "dry outside and wet inside", which affects the subsequent performance of the aggregates. Therefore, this invention proposes an aggregate pretreatment device for asphalt mixing plants.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An aggregate pretreatment device for an asphalt mixing plant includes a conveying channel, a feeding hopper installed on the upper surface of one end of the conveying channel, the feeding hopper being connected to the conveying channel, and a discharge port provided at the end of the conveying channel away from the feeding hopper. A rotating shaft is horizontally rotatably installed inside the conveying channel. An auger blade is fixedly sleeved on the rotating shaft. A drive motor is fixedly installed at one end of the conveying channel. One end of the output shaft of the drive motor is fixedly connected to one end of the auger blade. A rectangular cover is installed on the conveying channel, and a cavity is formed between the rectangular cover and the conveying channel. A drying component for conveying hot air into the conveying channel is provided on the rectangular cover.

[0007] Preferably, multiple air inlets are provided between the cavity and the conveying channel. The drying assembly includes two dryers symmetrically fixed on a rectangular cover and two air inlets installed at the output ends of the two dryers respectively. One end of each of the two air inlets is fixedly connected to the rectangular cover and communicates with the cavity.

[0008] Preferably, multiple vertical pipes are fixedly installed at equal intervals on the lower surface of the conveying channel, one end of each of the multiple vertical pipes is connected to the interior of the conveying channel, and a drain head is installed at the lower end of each of the multiple vertical pipes.

[0009] Preferably, a connecting pipe is installed between the vertical tube and the rectangular cover, and the two ends of the connecting pipe are respectively connected to the interior of the vertical tube and the cavity.

[0010] Preferably, the connecting pipe is connected to the side of the vertical pipe, and the connection point between the connecting pipe and the vertical pipe is located between the drain head and the conveying channel.

[0011] Preferably, brackets are symmetrically fixedly installed on the conveying channel, and each of the two brackets has a connection hole at its bottom.

[0012] The beneficial effects of this utility model are as follows: 1. The drive motor drives the rotating shaft and auger blades to rotate, continuously turning and stirring the aggregate during the conveying process. This breaks up the thick layer of aggregate that forms during traditional conveying. At the same time, the cavity formed by the rectangular cover and the conveying channel delivers hot air evenly into the channel through multiple air inlets. The hot air can fully contact the surface and interior of the aggregate as it turns, avoiding the hot air only acting on the surface aggregate. This ensures that the aggregate is dried evenly and guarantees its subsequent performance. 2. Moisture in the conveying channel can enter the vertical pipe and be discharged through the drain head. At the same time, hot air in the cavity can enter the vertical pipe through the connecting pipe, and then enter the conveying channel from the bottom through the vertical pipe, which can dry the aggregate from the bottom, effectively improving the drying efficiency of the aggregate. Attached Figure Description

[0013] Figure 1 This is a frontal three-dimensional structural diagram of an aggregate pretreatment device for an asphalt mixing plant proposed in this utility model; Figure 2This is a rear-view three-dimensional structural diagram of an aggregate pretreatment device for an asphalt mixing plant proposed in this utility model; Figure 3 This is a three-dimensional cross-sectional structural diagram of an aggregate pretreatment device for an asphalt mixing plant proposed in this utility model; Figure 4 A three-dimensional structural diagram of the rectangular cover and drying components; Figure 5 This is a schematic diagram of the three-dimensional cross-sectional structure of the vertical pipe and the drain head.

[0014] In the diagram: 1 Conveying channel, 2 Support, 3 Feed hopper, 4 Discharge port, 5 Rotating shaft, 6 Screw blade, 7 Drive motor, 8 Rectangular cover, 9 Air inlet, 10 Dryer, 11 Air inlet pipe, 12 Vertical pipe, 13 Connecting pipe, 14 Drain head. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] Reference Figures 1-2 An aggregate pretreatment device for an asphalt mixing plant includes a conveying channel 1, on which supports 2 are symmetrically fixed. Each support 2 has a connection hole at its bottom. A feed hopper 3 is installed on the upper surface of one end of the conveying channel 1 and is connected to the conveying channel 1. A discharge port 4 is provided at the end of the conveying channel 1 away from the feed hopper 3. The supports 2 are symmetrically fixed on both sides of the conveying channel 1, and the bottom connection holes can be connected to the ground or a fixed base to achieve stable support for the entire device and prevent the device from shifting due to vibration during aggregate conveying and mixing. The feed hopper 3 serves as an aggregate input channel and is connected to the conveying channel 1 to guide the aggregate to be treated into the conveying channel 1. The finally treated aggregate is discharged through the discharge port 4, completing the pretreatment process.

[0017] Reference Figure 3 A rotating shaft 5 is horizontally rotatably installed inside the conveying channel 1. An auger blade 6 is fixedly sleeved on the rotating shaft 5. A drive motor 7 is fixedly installed at one end of the conveying channel 1. One end of the output shaft of the drive motor 7 is fixedly connected to one end of the auger blade 6. A rectangular cover 8 is installed on the conveying channel 1. A cavity is formed between the rectangular cover 8 and the conveying channel 1. A drying component for conveying hot air into the conveying channel 1 is provided on the rectangular cover 8.

[0018] When the drive motor 7 is working, its output shaft drives the rotating shaft 5 to rotate, which in turn drives the auger blades 6 to rotate synchronously. During the rotation of the auger blades 6, on the one hand, it can push the aggregate in the conveying channel 1 from the feed hopper 3 to the discharge port 4, realizing the directional movement of the aggregate. On the other hand, when the auger blades 6 rotate, they will tumble and stir the aggregate, breaking the thick layer of aggregate accumulated in the traditional conveying process, so that the aggregate is dispersed, creating conditions for subsequent uniform drying.

[0019] Reference Figure 4 Multiple air inlets 9 are provided between the cavity and the conveying channel 1. The drying assembly includes two dryers 10 symmetrically fixed on the rectangular cover 8 and two air inlets 11 respectively installed at the output ends of the two dryers 10. One end of each air inlet 11 is fixedly connected to the rectangular cover 8 and communicates with the cavity.

[0020] The cavity formed by the rectangular cover 8 and the conveying channel 1 provides a temporary storage and buffer space for hot air. The dryer 10 generates hot air during operation, which is conveyed into the cavity through the air inlet pipe 11. After the hot air diffuses in the cavity, it enters the conveying channel 1 evenly through multiple air inlets 9. At this time, the auger blades 6 are driving the aggregate to turn over. The hot air can fully contact the surface and interior of the aggregate as it is dispersed, avoiding the problem that the hot air only acts on the surface aggregate in traditional devices, thus achieving uniform drying of the aggregate.

[0021] Reference Figure 5 Multiple vertical pipes 12 are fixedly installed vertically and at equal intervals on the lower surface of the conveying channel 1. One end of each vertical pipe 12 is connected to the interior of the conveying channel 1. A drain head 14 is installed at the lower end of each vertical pipe 12. A connecting pipe 13 is installed between the vertical pipe 12 and the rectangular cover 8. The two ends of the connecting pipe 13 are connected to the interior of the vertical pipe 12 and the cavity, respectively. The connecting pipe 13 is connected to the side of the vertical pipe 12. The connection point between the connecting pipe 13 and the vertical pipe 12 is located between the drain head 14 and the conveying channel 1.

[0022] The moisture separated from the aggregate during the drying process will enter the vertical pipe 12 through the bottom of the conveying channel 1 under the action of gravity, and finally be discharged through the drain head 14. This avoids the water from being retained in the conveying channel 1 and causing the aggregate to be moistened again. At the same time, some of the hot air in the cavity enters the vertical pipe 12 through the connecting pipe 13. When the hot air flows in the vertical pipe 12, some of the hot air will enter the conveying channel 1 from the connection between the vertical pipe 12 and the conveying channel 1, drying the aggregate from the bottom. This forms a coordinated heating effect with the hot air input from the air inlet 9, further improving the drying efficiency.

[0023] In this invention, when the drive motor 7 is working, its output shaft drives the rotating shaft 5 to rotate, which in turn drives the auger blades 6 to rotate synchronously. During the rotation of the auger blades 6, on the one hand, the aggregate in the conveying channel 1 can be pushed from the feed hopper 3 to the discharge port 4, realizing the directional movement of the aggregate. On the other hand, when the auger blades 6 rotate, they will agitate and stir the aggregate, breaking the thick layer of aggregate accumulated in traditional conveying, so that the aggregate is dispersed, creating conditions for subsequent uniform drying. At the same time, the drying component continuously supplies hot air into the conveying channel 1 through the rectangular cover 8 and the air inlet 9. The hot air can fully contact the surface and interior of the aggregate as it is dispersed, avoiding the problem that the hot air only acts on the surface aggregate in traditional devices, thus realizing uniform drying of the aggregate and ensuring the subsequent performance of the aggregate.

[0024] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An aggregate pretreatment device for an asphalt mixing plant, comprising a conveying channel (1), characterized in that, A feeding hopper (3) is installed on the upper surface of one end of the conveying channel (1). The feeding hopper (3) is connected to the conveying channel (1). A discharge port (4) is provided at the end of the conveying channel (1) away from the feeding hopper (3). A rotating shaft (5) is horizontally rotatably installed inside the conveying channel (1). A screw conveyor blade (6) is fixedly sleeved on the rotating shaft (5). A drive motor (7) is fixedly installed at one end of the conveying channel (1). One end of the output shaft of the drive motor (7) is fixedly connected to one end of the screw conveyor blade (6). A rectangular cover (8) is installed on the conveying channel (1). A cavity is formed between the rectangular cover (8) and the conveying channel (1). A drying component for conveying hot air into the conveying channel (1) is provided on the rectangular cover (8).

2. The aggregate pretreatment device for an asphalt mixing plant according to claim 1, characterized in that, Multiple air inlets (9) are provided between the cavity and the conveying channel (1). The drying assembly includes two dryers (10) symmetrically fixed on the rectangular cover (8) and two air inlets (11) respectively installed at the output ends of the two dryers (10). One end of each of the two air inlets (11) is fixedly connected to the rectangular cover (8) and communicates with the cavity.

3. The aggregate pretreatment device for an asphalt mixing plant according to claim 1, characterized in that, Multiple vertical pipes (12) are fixedly installed vertically and at equal intervals on the lower surface of the conveying channel (1). One end of each of the multiple vertical pipes (12) is connected to the inside of the conveying channel (1), and a drain head (14) is installed at the lower end of each of the multiple vertical pipes (12).

4. The aggregate pretreatment device for an asphalt mixing plant according to claim 3, characterized in that, A connecting pipe (13) is installed between the vertical pipe (12) and the rectangular cover (8), and the two ends of the connecting pipe (13) are respectively connected to the interior of the vertical pipe (12) and the cavity.

5. The aggregate pretreatment device for an asphalt mixing plant according to claim 4, characterized in that, The connecting pipe (13) is connected to the side of the vertical pipe (12), and the connection between the connecting pipe (13) and the vertical pipe (12) is located between the drain head (14) and the conveying channel (1).

6. The aggregate pretreatment device for an asphalt mixing plant according to claim 1, characterized in that, The conveying channel (1) is symmetrically fixed with brackets (2), and the bottom of the two brackets (2) are provided with connection holes.

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