An asphalt concrete aggregate screening device

Abstract

This utility model relates to the technical field of screening devices and discloses an asphalt concrete aggregate screening device, including a mounting frame and a multi-stage screen. The mounting frame has an integrally formed material hopper at its bottom. This utility model uses a servo motor and a first synchronous belt at the output end to drive the corresponding reciprocating screws. The ends of multiple sets of reciprocating screws are synchronously driven by a second synchronous belt, enabling the multiple sets of reciprocating screws to rotate synchronously. This allows the slide plate to slide back and forth along the guide groove. When the slide plate slides back and forth, the brush on the bottom surface of the slide plate can form elastic contact with the vibrating multi-stage screen surface under the transmission of the compression spring. In this way, when the brush moves left and right while making contact, it can promptly clean the blockage in the mesh holes of the corresponding multi-stage screen, thereby realizing the synchronous cleaning of the concrete aggregate blocked on the equally spaced multi-stage screen, avoiding severe blockage of the multi-stage screen and obstruction of aggregate screening.

Description

Technical Field

[0001] This utility model relates to the field of screening device technology, specifically to an asphalt concrete aggregate screening device. Background Technology

[0002] After asphalt concrete aggregates are crushed, the aggregate particles are of different sizes and need to be screened. Multi-stage screens are usually used to classify and screen the aggregates.

[0003] For example, Chinese Patent Publication No. CN219233034U discloses a recycled concrete aggregate screening device for hot-mix asphalt concrete production, including a mounting frame, a guide hopper installed at the top of the mounting frame, and movable holes arranged at equal intervals on the left side of the mounting frame, with movable seats installed on the inner bottom wall of each movable hole.

[0004] The aforementioned comparative document describes how controlling the drive motor to rotate the drive rod can simultaneously drive all the worm gears to rotate, allowing each worm gear to mesh with the worm wheel, thereby driving the cam to rotate. The cam can then press down on the right side of the screening frame, causing the screening frame to vibrate. This, in turn, drives the screening frame to move up and down repeatedly, enabling the screening of aggregates and improving the screening quality of the aggregates.

[0005] However, in actual use, the concrete aggregate screening device described above screens the concrete introduced from above through multiple stages of screens with equal spacing. During screening, when the concrete aggregate is close to the mesh size of multiple sets of screens of different stages, it is easy to get clogged in the screen mesh, causing severe clogging of the multi-stage screens, hindering aggregate screening. Furthermore, after screening, the fine material enters the lower hopper and cannot be discharged in time, resulting in severe accumulation at the bottom of the hopper. Utility Model Content

[0006] The purpose of this utility model is to provide an asphalt concrete aggregate screening device. This asphalt concrete aggregate screening device can simultaneously clean the concrete aggregate that is blocked on the multi-stage screens with equal spacing, so as to avoid serious blockage of the multi-stage screens and obstruction of aggregate screening. At the same time, it can promptly discharge the fine material after screening to avoid serious accumulation at the bottom of the silo.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an asphalt concrete aggregate screening device, comprising a mounting frame and a multi-stage screen. The mounting frame has an integrally formed hopper at its bottom. A servo motor is fixedly installed on one side of the hopper's exterior. A spiral conveyor blade is fixedly connected to the output end of the servo motor. A reciprocating mechanism is provided on the inner wall of the mounting frame. The reciprocating mechanism includes a reciprocating screw and a guide rod. The reciprocating screw is rotatably mounted on one side of the inner wall of the mounting frame, and the guide rod is fixedly inserted through the other side of the inner wall of the mounting frame. Multiple sets of reciprocating screws are respectively provided with a pulley and a second synchronous belt at one end. A cleaning mechanism is also provided on the inner wall of the mounting frame away from the servo motor. The cleaning mechanism includes a sliding plate, with a brush movably installed in the middle of the sliding plate. Both ends of the sliding plate are respectively connected to the corresponding reciprocating screw and guide rod.

[0008] Preferably, a feed hopper is connected through the top of the mounting frame, and guide ports are provided at equal intervals on one side of the inner wall of the mounting frame.

[0009] Preferably, the multi-stage screen is movably installed on the inner wall of the mounting frame, and one end of the multi-stage screen extends into the inner wall of the corresponding feed inlet.

[0010] Preferably, a material pipe is connected through the bottom of the hopper on the side away from the servo motor, and the spiral conveyor blade is located in the inner cavity of the hopper.

[0011] Preferably, the inner wall of the mounting frame is symmetrically provided with guide grooves and clearance grooves. The reciprocating lead screw and the guide rod are located in the corresponding guide grooves, and the slide plate and the brush in the same group are located in the inner wall of the corresponding clearance groove.

[0012] Preferably, pulleys are fixedly fitted onto the ends of the multiple sets of reciprocating lead screws and the output end of the servo motor, and the two sets of pulleys that are adjacent to each other are connected by a second synchronous belt. The pulley at the end of the servo motor is connected to one of the pulleys at the end of the reciprocating lead screw by a first synchronous belt.

[0013] Preferably, one end of the slide plate is threadedly connected to the corresponding reciprocating lead screw, and the other end of the slide plate is movably sleeved on the guide rod.

[0014] Preferably, a compression spring is fixedly installed between the top of the brush and the relief groove.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention uses a servo motor and a first synchronous belt at the output end to drive a corresponding reciprocating screw. The ends of multiple sets of reciprocating screws are synchronously driven by a second synchronous belt, enabling the multiple sets of reciprocating screws to rotate synchronously. This allows the slide plate to slide back and forth along the guide groove. When the slide plate slides back and forth, the brush on the bottom of the slide plate, driven by a compression spring, can form elastic contact with the vibrating multi-stage screen surface. In this way, while the brush is in contact, it can clean the blockage in the mesh holes of the corresponding multi-stage screen in a timely manner. This enables the synchronous cleaning of the concrete aggregate blocked on the multi-stage screen with equal spacing, avoiding severe blockage of the multi-stage screen and obstruction of aggregate screening.

[0017] In this invention, when the servo motor rotates, it drives the spiral conveyor blades to rotate in the inner cavity of the hopper through the output end, thereby discharging the fine material after screening from the bottom of the hopper through the material pipe. This prevents the fine material after screening from entering the lower hopper and failing to be discharged in time, thus avoiding serious accumulation at the bottom of the hopper. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a side view of the present invention.

[0020] Figure 3 This is a schematic diagram of the internal structure of the mounting bracket in this utility model;

[0021] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0022] In the diagram: 1. Mounting frame; 2. Hopper; 3. Multi-stage screen; 4. Servo motor; 5. Reciprocating mechanism; 6. Cleaning mechanism; 11. Feed hopper; 12. Guide port; 21. Material pipe; 41. First synchronous belt; 42. Spiral conveyor blade; 50. Guide groove; 51. Reciprocating screw; 52. Guide rod; 53. Pulley; 54. Second synchronous belt; 61. Clearance groove; 62. Slide plate; 63. Brush; 64. Compression spring. Detailed Implementation

[0023] 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. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Please see Figure 1-4This utility model provides a technical solution: an asphalt concrete aggregate screening device, including a mounting frame 1, a multi-stage screen 3, a hopper 2 integrally formed at the bottom of the mounting frame 1, a servo motor 4 fixedly installed on one side of the outer side of the hopper 2, a spiral conveying blade 42 fixedly connected to the output end of the servo motor 4, and a reciprocating mechanism 5 provided on the inner wall of the mounting frame 1.

[0025] The reciprocating mechanism 5 includes a reciprocating lead screw 51 and a guide rod 52. The reciprocating lead screw 51 is rotatably mounted on one side of the inner wall of the mounting frame 1, and the guide rod 52 is fixedly passed through the other side of the inner wall of the mounting frame 1. One end of each set of reciprocating lead screws 51 is provided with a pulley 53 and a second synchronous belt 54. A cleaning mechanism 6 is also provided on the side of the inner wall of the mounting frame 1 away from the servo motor 4. The cleaning mechanism 6 includes a slide plate 62. A brush 63 is movably mounted in the middle of the slide plate 62. Both ends of the slide plate 62 are connected to the corresponding reciprocating lead screw 51 and guide rod 52, respectively.

[0026] The inner wall of the mounting frame 1 is equipped with a multi-stage screen 3. The size of the multi-stage screen 3 gradually decreases from top to bottom. The crushed asphalt concrete is introduced into the feed hopper 11 and screened by the multi-stage screen 3, so that the crushed asphalt concrete can be screened to obtain aggregates of appropriate size. After the target concrete aggregate is screened out, it can be discharged from the corresponding feed port 12.

[0027] The servo motor 4 drives the corresponding reciprocating screw 51 through the first synchronous belt 41 at the output end. The ends of multiple sets of reciprocating screws 51 are synchronously driven by the second synchronous belt 54, so that multiple sets of reciprocating screws 51 can rotate synchronously. This allows the slide plate 62 to slide back and forth along the guide groove 50. When the slide plate 62 slides back and forth, the brush 63 on the bottom surface of the slide plate 62 can form elastic contact with the surface of the vibrating multi-level screen 3 under the drive of the compression spring 64. In this way, when the brush 63 moves left and right while making contact, it can clean the blockage of the mesh holes of the corresponding multi-level screen 3 in time, thereby realizing the synchronous cleaning of the concrete aggregate blocked on the multi-level screen 3 with equal spacing, avoiding serious blockage of the multi-level screen 3 and the obstruction of aggregate screening.

[0028] When the servo motor 4 rotates, it drives the spiral conveyor blade 42 to rotate in the inner cavity of the hopper 2 through the output end, thereby discharging the fine material after screening at the bottom of the hopper 2 from the material pipe 21. This prevents the fine material after screening from entering the lower hopper 2 and failing to be discharged in time, thus avoiding serious accumulation at the bottom of the hopper 2.

[0029] The mounting frame 1 has a feed hopper 11 that runs through its top. The inner wall of the mounting frame 1 has guide ports 12 that are evenly spaced on one side. The inner wall of the mounting frame 1 is equipped with multi-stage screens 3, which are movably installed on the inner wall of the mounting frame 1. One end of the multi-stage screens 3 extends into the inner wall of the corresponding guide port 12. The size of the multi-stage screens 3 gradually decreases from top to bottom. The crushed asphalt concrete is introduced into the feed hopper 11 and screened by the multi-stage screens 3, so that the crushed asphalt concrete can be screened to obtain aggregates of appropriate size. After the target concrete aggregates are screened out, they can be discharged from the corresponding guide ports 12.

[0030] In this device, a material pipe 21 is connected to the bottom of the hopper 2 on the side away from the servo motor 4. The spiral conveyor blade 42 is located in the inner cavity of the hopper 2. When the servo motor 4 rotates, it drives the spiral conveyor blade 42 to rotate in the inner cavity of the hopper 2 through the output end, thereby exporting the fine material after screening at the bottom of the hopper 2 from the material pipe 21.

[0031] The mounting frame 1 has symmetrical guide grooves 50 and clearance grooves 61 on its inner walls. The reciprocating screws 51 and guide rods 52, located in the same plane, are respectively located in the corresponding guide grooves 50. The sliding plate 62 and brush 63 are located in the inner walls of the corresponding clearance grooves 61. The ends of the multiple sets of reciprocating screws 51 and the output end of the servo motor 4 are respectively fixedly fitted with pulleys 53. The two adjacent sets of pulleys 53 are connected by a second synchronous belt 54. The pulley 53 at the end of the servo motor 4 is connected to the pulley 53 at the end of one set of reciprocating screws 51 by a first synchronous belt 41. One end of the sliding plate 62 is connected to the corresponding reciprocating screw 51 by a thread. The other end of the sliding plate 62 is movably fitted on the guide rod 52. The corresponding reciprocating screw 51 is driven by the first synchronous belt 41 at the output end of the servo motor 4. The ends of the multiple sets of reciprocating screws 51 are synchronously driven by the second synchronous belt 54, so that the multiple sets of reciprocating screws 51 can rotate synchronously, thereby allowing the sliding plate 62 to slide back and forth along the guide grooves 50.

[0032] A compression spring 64 is fixedly installed between the top of the brush 63 and the clearance groove 61. When the slide plate 62 slides back and forth, the brush 63 on the bottom surface of the slide plate 62 can form elastic contact with the vibrating multi-stage screen 3 under the transmission of the compression spring 64. In this way, when the brush 63 moves left and right while making contact, it can clean the blockage of the mesh hole of the corresponding multi-stage screen 3 in time.

[0033] Working principle: When in use, crushed asphalt concrete is introduced through hopper 11 and screened through multi-stage screen 3, so that aggregates of appropriate size can be screened out of the crushed asphalt concrete. After the target concrete aggregate is screened out, it can be discharged from the corresponding feed port 12.

[0034] During the multi-stage screening of crushed asphalt concrete, the servo motor 4 drives the corresponding reciprocating screw 51 through the first synchronous belt 41 at the output end. The ends of multiple sets of reciprocating screws 51 are synchronously driven by the second synchronous belt 54, so that multiple sets of reciprocating screws 51 can rotate synchronously. This allows the slide plate 62 to slide back and forth along the guide groove 50. When the slide plate 62 slides back and forth, the brush 63 on the bottom surface of the slide plate 62 can form elastic contact with the surface of the vibrating multi-stage screen 3 under the drive of the compression spring 64. In this way, when the brush 63 moves left and right while making contact, it can clean the blockage of the mesh holes of the corresponding multi-stage screen 3 in time, thereby realizing the synchronous cleaning of the concrete aggregate blocked on the multi-stage screen 3 with equal spacing, avoiding serious blockage of the multi-stage screen 3 and the obstruction of aggregate screening.

[0035] When the servo motor 4 rotates, it drives the spiral conveyor blade 42 to rotate in the inner cavity of the hopper 2 through the output end, thereby discharging the fine material after screening at the bottom of the hopper 2 from the material pipe 21. This prevents the fine material after screening from entering the lower hopper 2 and failing to be discharged in time, thus avoiding serious accumulation at the bottom of the hopper 2.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the principles of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bituminous concrete aggregate screening device comprising a mounting frame (1), a plurality of sieves (3), characterised in that: The mounting frame (1) has an integrally formed hopper (2) at the bottom. A servo motor (4) is fixedly installed on one side of the hopper (2). The output end of the servo motor (4) is fixedly connected to a spiral conveyor blade (42). A reciprocating mechanism (5) is provided on the inner wall of the mounting frame (1). The reciprocating mechanism (5) includes a reciprocating screw (51) and a guide rod (52). The reciprocating screw (51) is rotatably installed on one side of the inner wall of the mounting frame (1), and the guide rod (52) is fixedly inserted through it. On the other side of the inner wall of the mounting frame (1), one end of each of the multiple sets of reciprocating screws (51) is provided with a pulley (53) and a second synchronous belt (54). A cleaning mechanism (6) is also provided on the side of the inner wall of the mounting frame (1) away from the servo motor (4). The cleaning mechanism (6) includes a slide plate (62). A brush (63) is movably installed in the middle of the slide plate (62). The two ends of the slide plate (62) are respectively connected to the corresponding reciprocating screw (51) and guide rod (52).

2. An asphalt concrete aggregate screening apparatus as claimed in claim 1, wherein: The top of the mounting frame (1) is connected to a feed hopper (11), and the inner wall of the mounting frame (1) is provided with guide ports (12) at equal intervals on one side.

3. An asphalt concrete aggregate screening apparatus as claimed in claim 2, wherein: The multi-stage screen (3) is movably installed on the inner wall of the mounting frame (1), and one end of the multi-stage screen (3) extends into the inner wall of the corresponding feed inlet (12).

4. An asphalt concrete aggregate screening apparatus as claimed in claim 3, wherein: The bottom of the hopper (2) away from the servo motor (4) is connected to a material pipe (21), and the spiral conveyor blade (42) is located in the inner cavity of the hopper (2).

5. An asphalt concrete aggregate screening apparatus as claimed in claim 4, wherein: The mounting bracket (1) has guide grooves (50) and clearance grooves (61) symmetrically opened around its inner wall. The reciprocating screw (51) and the guide rod (52) located in the same plane are respectively located in the corresponding guide grooves (50), and the sliding plate (62) and the brush (63) in the same group are located in the inner wall of the corresponding clearance grooves (61).

6. The asphalt concrete aggregate screening device according to claim 5, characterized in that: Multiple sets of reciprocating lead screws (51) are respectively fixedly fitted with pulleys (53) at their ends and at the output end of the servo motor (4). Two sets of pulleys (53) that are adjacent to each other are connected by a second synchronous belt (54). The pulley (53) at the end of the servo motor (4) is connected to the pulley (53) at the end of one set of reciprocating lead screws (51) by a first synchronous belt (41).

7. An asphalt concrete aggregate screening apparatus as claimed in claim 6, wherein: One end of the slide plate (62) is connected to the corresponding reciprocating lead screw (51) by a thread, and the other end of the slide plate (62) is movably sleeved on the guide rod (52).

8. An asphalt concrete aggregate screening apparatus according to claim 7, wherein: A compression spring (64) is fixedly installed between the top of the brush (63) and the relief groove (61).

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