Large-particle-size material screening device for transmission connection position of asphalt concrete mixing plant

Abstract

The utility model relates to the technical field of sieving, and discloses a large-particle-size material sieving device at a transmission junction of an asphalt concrete mixing plant, which comprises a bottom plate, a sliding rail is fixedly connected to the top of the bottom plate, a mounting frame is fixedly connected to the top of the bottom plate, and a sieving box is slidably connected to the top of the sliding rail. A first discharging plate is fixedly connected to the side wall of the screening box, a second discharging plate is fixedly connected to the side wall of the screening box, a screening plate is arranged in the screening box and connected with the screening box through a fixing mechanism, and a reciprocating mechanism is arranged on the side wall of the mounting frame. The motor drives the belt wheel, further drives the rotating shaft and drives the rotating disc to rotate, the connecting plate is driven by the rotating disc to drive the screening box to move back and forth on the sliding rail, material screening is achieved, qualified materials fall into the lower portion through the screening plate and are fed into the drying cylinder through the inclined belt, and disqualified large-block materials are discharged through the first discharging plate. Through cooperation of the structures, precise separation is achieved, and the product quality is improved.

Description

A large-diameter material screening device at the transfer and handover point of an asphalt concrete mixing plant Technical Field

[0001] This utility model relates to the field of screening technology, and in particular to a screening device for large-diameter materials at the transfer and handover point of an asphalt concrete mixing plant. Background Technology

[0002] In road construction and urban infrastructure projects, asphalt concrete mixing plants are key equipment for producing asphalt mixtures, and their operating efficiency and mixture quality significantly impact the overall construction quality. The transfer and handover point is a crucial link in the asphalt concrete production process, primarily used for the transfer and connection of materials between different processing stages. If large-diameter aggregates are mixed in during material transfer, it will negatively affect the uniformity of subsequent mixing and the quality of paving. Therefore, installing a large-diameter material screening device at the transfer and handover point helps to remove aggregates that do not meet the required particle size, ensuring that the raw materials entering the mixing system meet the standards, thus improving the uniformity and workability of the mixture.

[0003] Existing screening devices for large-diameter materials at the transfer and handover points of asphalt concrete mixing plants typically employ fixed screens, relying on the material's own weight or vibration devices for particle size separation. For example, some devices use inclined screen plates to allow materials to roll and separate on the screen surface. However, existing technologies generally suffer from problems such as simple structure and passive screening methods during the screening process, mainly relying on material falling or vibration to achieve separation. This makes it difficult to achieve precise control of the screening process, resulting in limited screening accuracy and efficiency. Therefore, a new screening device for large-diameter materials at the transfer and handover points of asphalt concrete mixing plants is proposed to solve the above problems. Summary of the Invention

[0004] To overcome the above shortcomings, this utility model provides a large-diameter material screening device at the transfer and handover point of an asphalt concrete mixing plant, aiming to improve the problems of simple structure and passive screening method in the existing technology.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A large-diameter material screening device for the transfer and handover position of an asphalt concrete mixing plant includes a base plate, a slide rail fixedly connected to the top of the base plate, an mounting frame fixedly connected to the top of the base plate, a screening box slidably connected to the top of the slide rail, a discharge plate one fixedly connected to the side wall of the screening box, a discharge plate two fixedly connected to the side wall of the screening box, a screen plate inside the screening box, the screen plate being connected to the screening box via a fixing mechanism, and a reciprocating mechanism on the side wall of the mounting frame.

[0007] The reciprocating mechanism includes a turntable, a connecting block, and a connecting plate. A fixed frame is fixedly connected to the top of the mounting frame, and a rotating shaft is rotatably connected inside the fixed frame. A driving assembly is provided on the top of the base plate to drive the rotating shaft to rotate. The side wall of the turntable is fixedly connected to one end of the rotating shaft, the side wall of the connecting block is fixedly connected to the side wall of the screening box, one side of the connecting plate is rotatably connected to the side wall of the connecting block, and the other side of the connecting plate is rotatably connected to the side wall of the turntable away from the center.

[0008] As a further description of the above technical solution:

[0009] The drive assembly includes a motor, which is mounted on the top of the base plate. A pulley is fixedly connected to the output end of the motor, and a second pulley is fixedly connected to the side wall of the rotating shaft. A belt is provided between the first pulley and the second pulley.

[0010] As a further description of the above technical solution:

[0011] The screening box has a slot inside, and a card block sidewall is fixedly connected to the side wall of the sieve plate. The card block sidewall is slidably connected inside the slot.

[0012] As a further description of the above technical solution:

[0013] The fixing mechanism includes a fixing pin and a groove formed inside the sieve plate. The side wall of the screening box is rotatably connected to a rotating frame. The side wall of the fixing pin is slidably connected inside the rotating frame. The side wall of the fixing pin is slidably connected inside the screening box and the groove.

[0014] As a further description of the above technical solution:

[0015] A limiting plate is fixedly connected to the side wall of the fixing pin, and a spring is sleeved on the outside of the fixing pin.

[0016] As a further description of the above technical solution:

[0017] One end of the spring is fixedly connected to the side wall of the limiting plate, and the other end of the spring is fixedly connected to the side wall of the rotating frame.

[0018] As a further description of the above technical solution:

[0019] The sieve plate and the discharge plate are located on the same horizontal plane.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, the motor drives the pulley, which in turn drives the rotating shaft, causing the turntable to rotate. The connecting plate, driven by the turntable, moves the screening box back and forth on the slide rail to achieve material screening. Qualified materials fall through the screen plate and are fed into the drying cylinder by the inclined belt, while unqualified large pieces of material are discharged through the discharge plate. Through the cooperation between the above structures, precise separation is achieved, improving product quality.

[0022] 2. In this utility model, by pulling the fixing pin to compress the spring, the screen plate is released from the restriction and then lifted upwards for replacement. After replacement, the screen plate is inserted into the slot, and then the rotating frame is rotated to align the fixing pin with the groove. The spring returns to push the limiting plate and locks the fixing pin into the groove, realizing the quick installation and stable positioning of the screen plate. Through the cooperation between the above structures, the screen plate replacement operation is simple and efficient, reducing the complexity of manual operation and improving the equipment maintenance efficiency. Attached Figure Description

[0023] Figure 1 is a three-dimensional schematic diagram of a large-diameter material screening device at the transfer and handover position of an asphalt concrete mixing plant proposed in this utility model.

[0024] Figure 2 is a schematic diagram of the reciprocating mechanism of a large-diameter material screening device at the transfer and handover position of an asphalt concrete mixing plant proposed in this utility model.

[0025] Figure 3 is a schematic diagram of the sieve plate of a large-diameter material screening device at the transfer and handover position of an asphalt concrete mixing plant proposed in this utility model.

[0026] Figure 4 is a schematic diagram of the fixing mechanism of a large-diameter material screening device at the transfer and handover position of an asphalt concrete mixing plant proposed in this utility model.

[0027] Figure 5 is an enlarged view of point A in Figure 4.

[0028] Legend:

[0029] 1. Base plate; 2. Slide rail; 3. Mounting frame; 4. Screening box; 5. Discharge plate one; 6. Discharge plate two; 7. Screen plate; 8. Motor; 9. Pulley one; 10. Fixing frame; 11. Rotating shaft; 12. Pulley two; 13. Belt; 14. Turntable; 15. Connecting block; 16. Connecting plate; 17. Locking block; 18. Locking groove; 19. Rotating frame; 20. Fixing pin; 21. Limiting plate; 22. Spring; 23. Groove. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Referring to Figures 1-2, one embodiment of this utility model provides a large-particle material screening device for the transfer and handover position of an asphalt concrete mixing plant. It includes a base plate 1, with a slide rail 2 fixedly connected to the top of the base plate 1 for providing stable guidance and ensuring a smooth screening process. A mounting frame 3 is fixedly connected to the top of the base plate 1, and a screening box 4 is slidably connected to the top of the slide rail 2. The screening box 4 can reciprocate along the slide rail 2 to achieve dynamic screening. A discharge plate 1 5 and a discharge plate 2 6 are fixedly connected to the side wall of the screening box 4, respectively used to classify and discharge large particles and qualified fine particles. A screen plate 7 is provided inside the screening box 4 for screening the incoming material. The screen plate 7 and the discharge plate 1 5 are located on the same horizontal plane, facilitating the direct discharge of large particles after screening and avoiding blockage and accumulation. The screen plate 7 is connected to the screening box 4 through a fixing mechanism to ensure structural stability during the screening process. A reciprocating mechanism is provided on the side wall of the mounting frame 3 to drive the screening box 4 to achieve left and right reciprocating motion, enhancing the screening effect and improving screening efficiency. The complex mechanism includes a turntable 14, a connecting block 15, and a connecting plate 16. Through the linkage between these mechanisms, the screening box 4 is driven reciprocally, enhancing the dynamic disturbance effect of the screening process and thus improving screening accuracy and efficiency. A fixed frame 10 is fixedly connected to the top of the mounting frame 3. A rotating shaft 11 is rotatably connected inside the fixed frame 10. A drive assembly is installed on the top of the base plate 1 to provide the main power source for screening, driving the rotating shaft 11 to rotate. The side wall of the turntable 14 is fixedly connected to one end of the rotating shaft 11, and the side wall of the connecting block 15 is fixedly connected to... The side wall of the screening box 4 has a connecting plate 16 rotatably connected to the side wall of the connecting block 15 on one side, and the other side of the connecting plate 16 rotatably connected to the side wall of the turntable 14 away from the center. The driving component includes a motor 8, which is set on the top of the base plate 1. The output end of the motor 8 is fixedly connected to a pulley 9, and the side wall of the rotating shaft 11 is fixedly connected to a pulley 12. A belt 13 is provided between the pulley 9 and the pulley 12. After the motor 8 is started, the pulley 9 starts to rotate and drives the pulley 12 to rotate synchronously through the belt 13, thereby driving the rotating shaft 11 to rotate.

[0032] Referring to Figures 3-5, the screening box 4 has a slot 18 inside. A locking block 17 is fixedly connected to the side wall of the screen plate 7. The side wall of the locking block 17 is slidably connected inside the slot 18, allowing for quick positioning and guiding installation of the screen plate 7. The fixing mechanism includes a fixing pin 20 and a groove 23 inside the screen plate 7, used to further lock the position of the screen plate 7 and prevent it from loosening or falling off during operation. A rotating frame 19 is rotatably connected to the side wall of the screening box 4, facilitating displacement of the fixing mechanism during operation. The fixing pin 20 is slidably connected to the inside of the rotating frame 19. The fixing pin 20 is slidably connected to the inside of the screening box 4 and the groove 23. Under the drive of the rotating frame 19, it can be accurately inserted into the groove 23. The fixing pin 20 is fixedly connected to the side of the limiting plate 21. A spring 22 is sleeved on the outside of the fixing pin 20. One end of the spring 22 is fixedly connected to the side of the limiting plate 21, and the other end of the spring 22 is fixedly connected to the side of the rotating frame 19 to provide return force. After the spring 22 is released, it automatically pushes the fixing pin 20 into the groove 23 to realize the automatic locking function.

[0033] Working principle: After the material falls from the surface of the transverse conveyor belt into the screening box 4, the motor 8 is then started to drive the pulley 9 to rotate, and the belt 13 further drives the pulley 12 to rotate, which in turn drives the rotating shaft 11 to rotate and drives the turntable 14 to perform circular motion. At this time, one side of the connecting plate 16 will deflect with the rotation of the turntable 14, and the other side will deflect on the connecting block 15 and drive the screening box 4 to move on the top of the slide rail 2. As the turntable 14 continues to rotate, the screening box 4 will reciprocate on the slide rail 2 under the connection of the connecting plate 16, thereby screening the material. The material that meets the specifications will fall down through the screen plate 7, and as the screening box 4 moves, it will finally fall onto the surface of the inclined conveyor belt through the discharge plate 6. The inclined conveyor belt will then send the material into the drying cylinder, while the large pieces of material on the surface of the screen plate 7 will be discharged through the discharge plate 5.

[0034] When it is necessary to replace the screen plate 7 to change the size of the screened material, the spring 22 is deformed by pulling the fixing pin 20, and pulled out of the screening box 4, so that the screen plate 7 is no longer restricted. At this time, the screen plate 7 can be taken out from the inside of the screening box 4 for replacement. When installing the screen plate 7, first slide the locking block 17 connected to the screen plate 7 into the slot 18, and drive the fixing pin 20 to move by rotating the rotating frame 19. When the fixing pin 20 moves to align with the groove 23, the spring 22 loses pressure and pushes the limiting plate 21 to move, so that the fixing pin 20 is inserted into the groove 23, locking the position of the screen plate 7 and ensuring the stability of the screen plate 7 during operation.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A large-diameter material screening device for the transfer and handover position of an asphalt concrete mixing plant, comprising a base plate (1), characterized in that: The top of the base plate (1) is fixedly connected to a slide rail (2), and the top of the base plate (1) is fixedly connected to a mounting bracket (3). The top of the slide rail (2) is slidably connected to a screening box (4). The side wall of the screening box (4) is fixedly connected to a discharge plate one (5), and the side wall of the screening box (4) is fixedly connected to a discharge plate two (6). The screening box (4) is equipped with a sieve plate (7), which is connected to the screening box (4) by a fixing mechanism. The side wall of the mounting bracket (3) is equipped with a reciprocating mechanism. The reciprocating mechanism includes a turntable (14) and a connecting block (15). The mounting frame (3) is fixedly connected to a fixed frame (10) at the top. The fixed frame (10) is rotatably connected to a rotating shaft (11) inside. The bottom plate (1) is provided with a driving assembly at the top to drive the rotating shaft (11) to rotate. The side wall of the turntable (14) is fixedly connected to one end of the rotating shaft (11). The side wall of the connecting block (15) is fixedly connected to the side wall of the screening box (4). One side of the connecting plate (16) is rotatably connected to the side wall of the connecting block (15). The other side of the connecting plate (16) is rotatably connected to the side wall of the turntable (14) away from the center.

2. The large-diameter material screening device at the transfer and handover point of an asphalt concrete mixing plant according to claim 1, characterized in that: The drive assembly includes a motor (8), which is mounted on the top of the base plate (1). A pulley (9) is fixedly connected to the output end of the motor (8), and a pulley (12) is fixedly connected to the side wall of the rotating shaft (11). A belt (13) is provided between the pulley (9) and the pulley (12).

3. A large-diameter material screening device for the transfer and handover point of an asphalt concrete mixing plant according to claim 1, characterized in that: The screening box (4) has a slot (18) inside, and the side wall of the sieve plate (7) is fixedly connected to the side wall of the card block (17), and the side wall of the card block (17) is slidably connected inside the slot (18).

4. A large-diameter material screening device at the transfer and handover point of an asphalt concrete mixing plant according to claim 1, characterized in that: The fixing mechanism includes a fixing pin (20) and a groove (23) opened inside the sieve plate (7). The side wall of the screening box (4) is rotatably connected to a rotating frame (19). The side wall of the fixing pin (20) is slidably connected inside the rotating frame (19). The side wall of the fixing pin (20) is slidably connected inside the screening box (4) and the groove (23).

5. A large-diameter material screening device for the transfer and handover point of an asphalt concrete mixing plant according to claim 4, characterized in that: The fixing pin (20) is fixedly connected to the side wall of the limiting plate (21), and a spring (22) is sleeved on the outside of the fixing pin (20).

6. A large-diameter material screening device for the transfer and handover point of an asphalt concrete mixing plant according to claim 5, characterized in that: One end of the spring (22) is fixedly connected to the side wall of the limiting plate (21), and the other end of the spring (22) is fixedly connected to the side wall of the rotating frame (19).

7. A large-diameter material screening device for the transfer and handover position of an asphalt concrete mixing plant according to claim 1, characterized in that: The sieve plate (7) and the discharge plate (5) are located on the same horizontal plane.

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