Hot-mix asphalt mixture recycled concrete aggregate screening device

Abstract

The utility model is suitable for the technical field of screening equipment, and provides a hot-mix asphalt mixture recycled concrete aggregate screening device which comprises a box body used for isolating a screening environment, the first conveying belt is arranged in the box body and used for screening and conveying recycled concrete aggregate, and meshes are formed in the first conveying belt; the second conveying belt is mounted in the box body and is used for conveying powder; the material guide plates are fixed on two sides of the box body, are used for guiding aggregate discharge in a grading manner and are positioned at the bottoms of the first conveying belt and the second conveying belt; and the material turning rod is rotationally arranged in the box body and is used for turning the regenerated concrete aggregate. According to the screening device for the recycled concrete aggregate of the hot-mixed asphalt mixture, the recycled concrete aggregate can be screened in a classified mode, and meanwhile dust is effectively prevented from polluting the environment.

Description

Technical Field

[0001] This utility model belongs to the technical field of screening equipment, and in particular relates to a screening device for recycled concrete aggregates from hot-mix asphalt mixtures. Background Technology

[0002] Recycled concrete refers to new concrete made by crushing, cleaning, and grading waste concrete blocks, mixing them with aggregates in a certain proportion, partially or completely replacing natural aggregates such as sand and gravel (mainly coarse aggregates), and then adding cement, water, etc.

[0003] Patent document CN219233034U discloses a recycled concrete aggregate screening device for hot-mix asphalt concrete production. The device includes a mounting frame with a guide hopper at its top. The left side of the mounting frame has evenly spaced movable holes, each with a movable seat mounted on its inner bottom wall. A screening frame is movably inserted into the interior of each hole, with its bottom left side movably connected to the movable seat. This invention guides recycled concrete aggregate into the mounting frame via the guide hopper. A drive motor rotates the drive rod, simultaneously rotating all worm gears. These worm gears mesh with worm wheels, driving a cam to rotate. The cam presses downwards against the right side of the screening frame, causing it to vibrate. This vibrates the screening frame, causing it to move up and down repeatedly, thus screening the aggregate and improving the screening quality.

[0004] The device uses a vibrating screen to screen aggregates. Large aggregates are heavy and difficult to turn over by vibration alone, which affects the screening effect. At the same time, the vibration of the aggregates can also cause damage to the screen. Utility Model Content

[0005] This utility model provides a hot-mix asphalt mixture recycled concrete aggregate screening device, which aims to solve the problem mentioned in the background art that when screening aggregates by vibrating screen frame, large aggregates are heavy and difficult to turn over by vibration alone, thus affecting the screening effect.

[0006] To solve the above problems, this utility model is implemented as follows: a hot-mix asphalt mixture recycled concrete aggregate screening device, comprising: a box for isolating the screening environment; a first conveyor belt disposed within the box for screening and conveying recycled concrete aggregate, the first conveyor belt having mesh openings; a second conveyor belt installed within the box for conveying powder; guide plates fixed on both sides of the box for graded guidance of aggregate discharge, the guide plates being located at the bottom of the first and second conveyor belts; a turning rod rotatably installed within the box for turning the recycled concrete aggregate; and a power assembly disposed outside the box for driving the turning rod, the first conveyor belt, and the second conveyor belt.

[0007] Preferably, the power assembly includes a first motor and a plurality of second motors fixed on the outer wall of the housing, the output shafts of the plurality of second motors being respectively connected to the first conveyor belt and the second conveyor belt; and a sprocket and a chain mounted on the tipping rod for transmission, the chain being sleeved on the sprocket and meshing with the sprocket.

[0008] Preferably, a fan and a filter box are installed on the housing, the air inlet of the fan is connected to the filter box, and air inlet pipes extending to both sides of the housing are installed on both sides of the filter box. A dust suction pipe located at the top of the guide plate is installed on the air inlet pipe for sucking up dust.

[0009] Preferably, a feeding hopper is installed on the top of the box, a support shaft is rotatably installed inside the feeding hopper, and a baffle for closing the feeding hopper is installed on the support shaft. The baffles are arranged in groups to maintain balance.

[0010] Preferably, the housing is provided with an operating port, and a protective door for closing the operating port is hinged to the housing. A limit plate is rotatably installed on the protective door, and a locking plate is installed on the housing, with the limit plate being locked inside the locking plate.

[0011] Preferably, the turning rod is fixed with an extension rod for pushing and mixing recycled concrete aggregate, and an elastic sleeve is fixedly fitted on the outside of the extension rod. The first motor and the second motor are both fixedly fitted with protective shells.

[0012] Preferably, a separator plate is detachably installed on the filter box by bolts, and a filter bag for separating dust is installed on the separator plate, the filter bag being located inside the filter box.

[0013] Preferably, the guide plate is L-shaped, and both sides of the guide plate are provided with side plates for preventing recycled concrete aggregate from falling. Both the first conveyor belt and the second conveyor belt are in contact with the inner wall of the box.

[0014] Compared with related technologies, the hot-mix asphalt mixture recycled concrete aggregate screening device provided by this utility model has the following beneficial effects:

[0015] Compared with existing technologies, the hot-mix asphalt mixture recycled concrete aggregate screening device provided in this solution improves the stability and accuracy of the screening process, reduces external interference and dust pollution, and achieves full turning and graded discharge of aggregates through the design of turning rods and graded guide plates, thereby improving screening efficiency and accuracy. At the same time, the addition of dust removal components such as fans and filter boxes effectively reduces dust pollution during the screening process and improves the working environment. Attached Figure Description

[0016] Figure 1This is a front sectional view of a hot-mix asphalt mixture recycled concrete aggregate screening device provided by this utility model;

[0017] Figure 2 This is a schematic diagram of the main structure of a hot-mix asphalt mixture recycled concrete aggregate screening device provided by this utility model;

[0018] Figure 3 This is a schematic diagram of the rear view structure of this utility model;

[0019] Figure 4 This is a three-dimensional structural diagram of the material-turning rod in this utility model.

[0020] Reference numerals in the attached drawings: 1. Box body; 2. First conveyor belt; 3. Second conveyor belt; 4. Guide plate; 5. Feed hopper; 6. Tilting rod; 7. Sprocket; 8. Chain; 9. First motor; 10. Second motor; 11. Support shaft; 12. Baffle; 13. Fan; 14. Filter box; 15. Air inlet pipe; 16. Dust suction pipe; 17. Extension rod; 18. Protective door; 19. Clamping plate; 20. Limiting plate. Detailed Implementation

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings are used to distinguish different objects, not to describe a particular order; the terms "inner," "outer," "left," and "right" indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0022] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0023] This utility model provides a device for screening recycled concrete aggregates from hot-mix asphalt mixtures, such as... Figure 1-4As shown, the hot-mix asphalt mixture recycled concrete aggregate screening device includes: a box 1 for isolating the screening environment; a first conveyor belt 2 installed inside the box 1 for screening and conveying recycled concrete aggregate, the first conveyor belt 2 having mesh openings; a second conveyor belt 3 installed inside the box 1 for conveying powder; guide plates 4 fixed on both sides of the box 1 for guiding aggregate discharge in stages, the guide plates 4 being located at the bottom of the first conveyor belt 2 and the second conveyor belt 3; a turning rod 6 rotatably installed inside the box 1 for turning the recycled concrete aggregate; and a power assembly installed outside the box 1 for driving the turning rod 6, the first conveyor belt 2, and the second conveyor belt 3.

[0024] In this embodiment, the housing 1 is used to isolate the screening environment, ensuring that the screening process takes place in a relatively enclosed space, reducing external interference, and improving the stability and accuracy of the screening process. It also helps to reduce noise and dust pollution. The first conveyor belt 2 is used to screen and transport recycled concrete aggregates. Its mesh design allows fine aggregates or powder to pass through, while large aggregates remain on the conveyor belt for further transport, achieving preliminary grading of the aggregates and improving screening efficiency. The second conveyor belt 3 is used to transport the powder or fine aggregates falling from the mesh of the first conveyor belt 2, ensuring the fine aggregates... The separate collection and processing improves the quality of recycled concrete aggregates. The guide plate 4 is used to guide the aggregate discharge in a grade. The guide plate 4 can guide the aggregate to different collection areas, further improving the grading accuracy of the aggregates and facilitating subsequent processing and utilization. The turning rod 6 is used to turn the recycled concrete aggregates. The rotation of the turning rod 6 can break the accumulation state between the aggregates, so that large aggregates can also be effectively screened. This solves the problem that large aggregates are difficult to turn by vibration alone, and improves the screening effect. At the same time, the turning action of the turning rod 6 also helps to reduce the damage of aggregates to the screening frame.

[0025] In a further preferred embodiment of the present invention, the power assembly includes a first motor 9 and a plurality of second motors 10 fixed on the outer wall of the housing 1, the output shafts of the plurality of second motors 10 being respectively connected to the first conveyor belt 2 and the second conveyor belt 3; and a sprocket 7 and a chain 8 mounted on the tipping rod 6 for transmission, the chain 8 being sleeved on the sprocket 7 and meshing with the sprocket 7.

[0026] In this embodiment, the first motor 9 serves as one of the main power sources of the entire screening device. By driving related transmission mechanisms (such as chain 8, sprocket 7, etc.), it provides power for the rotation of the turning rod 6, ensuring that the aggregate is turned evenly and effectively. The second motor 10 realizes the continuous conveying and grading screening of the aggregate. The mesh design on the first conveyor belt 2 allows fine aggregate to pass through, while large aggregate continues to be conveyed. The second conveyor belt 3 is specifically used to collect fine aggregate, improving screening efficiency and accuracy. The sprocket 7, through meshing with the chain 8, transmits the power of the first motor 9 to the turning rod 6, enabling it to rotate continuously and stably, ensuring the continuous and uniform rotation of the turning rod 6. At the same time, the chain 8 transmission has the advantages of simple structure, convenient maintenance, and high transmission efficiency.

[0027] In a further preferred embodiment of the present invention, a fan 13 and a filter box 14 are installed on the housing 1. The air inlet end of the fan 13 is connected to the filter box 14. Air inlet pipes 15 extending to both sides of the housing 1 are installed on both sides of the filter box 14. A dust suction pipe 16 located at the top of the guide plate 4 for sucking up dust is installed on the air inlet pipe 15.

[0028] In this embodiment, the blower 13 generates suction to draw dust and fine particles from inside the housing 1 into the dust removal system, effectively reducing dust pollution during the screening process and improving the working environment. The filter box 14 is filled with filter material, which can block dust and fine particles from entering the blower 13, protecting the blower 13 from damage, while ensuring that the exhaust air is relatively clean. The design of the air inlet pipe 15 allows the suction pipe 16 to be arranged more flexibly on the housing 1, ensuring that dust can be effectively drawn into the dust removal system. The arrangement of the suction pipe 16 allows it to effectively suck up dust from the top and nearby of the guide plate 4, reducing dust accumulation and dispersion, and further improving the dust removal effect.

[0029] In a further preferred embodiment of the present invention, a feeding hopper 5 is installed on the top of the box 1, a support shaft 11 is rotatably installed inside the feeding hopper 5, and a baffle 12 for closing the feeding hopper 5 is installed on the support shaft 11. The baffles 12 are arranged in groups to maintain balance.

[0030] In this embodiment, the design of the feeding hopper 5 allows users to easily pour recycled concrete aggregate into the screening device, improving operational convenience. Simultaneously, the position of the feeding hopper 5 ensures that the aggregate is evenly distributed on the first conveyor belt 2, which is beneficial for subsequent screening and grading. The design of the support shaft 11 allows the baffle 12 to rotate flexibly within the feeding hopper 5, thereby controlling the opening and closing of the feeding hopper 5. This design not only improves operational flexibility but also helps prevent aggregate from overflowing from the feeding hopper 5 during screening, maintaining a clean screening environment. The sealing effect of the baffle 12 effectively prevents dust generated during screening from overflowing from the feeding hopper 5, reducing aggregate waste and pollution of the screening environment. Furthermore, the grouped arrangement and rotating design of the baffle 12 improves its durability and service life. When adding aggregate, the weight of the aggregate allows the baffle 12 to rotate and open the opening of the feeding hopper 5, making operation very convenient.

[0031] In a further preferred embodiment of the present invention, the box 1 is provided with an operating port, and a protective door 18 for closing the operating port is hinged to the box 1. A limiting plate 20 is rotatably installed on the protective door 18, and a clamping plate 19 is installed on the box 1. The limiting plate 20 can be clamped in the clamping plate 19.

[0032] In this embodiment, the design of the operating port allows users to enter the housing 1 for maintenance and adjustment without disassembling the housing 1, which improves the ease of use and maintainability of the screening device. The protective door 18 is used to close the operating port to prevent external impurities from entering the screening device and internal impurities from floating out of the housing 1, while protecting users from potential dangers during the screening process. The design of the limiting plate 20 allows the protective door 18 to be firmly locked onto the housing 1 when closed, preventing it from being opened accidentally. At the same time, the rotation design of the limiting plate 20 allows it to easily engage or disengage with the locking plate 19, realizing the quick locking and unlocking of the protective door 18. The design of the locking plate 19 allows the protective door 18 to be firmly locked onto the housing 1 when closed, improving the safety and stability of the screening device. Meanwhile, the engagement method between the locking plate 19 and the limiting plate 20 is simple and effective, reducing the difficulty of operation and cost.

[0033] In a further preferred embodiment of the present invention, an extension rod 17 for pushing and mixing recycled concrete aggregate is fixed on the turning rod 6, and an elastic sleeve is fixedly sleeved on the extension rod 17. Protective shells are fixedly sleeved on the first motor 9 and the second motor 10.

[0034] In this embodiment, the design of the extension rod 17 allows the turning rod 6 to make more full contact with the recycled concrete aggregate when rotating, improving the uniformity and efficiency of the turning process. This helps to ensure that the recycled concrete aggregate is fully mixed and graded during the screening process, improving the screening quality and output. The elastic sleeve design not only protects the extension rod 17 from wear and damage, but also reduces the noise and vibration generated during the turning process. This helps to extend the service life of the screening device and improve the working environment. The protective shell design ensures that the motor can still operate stably in harsh working environments, reducing failures and downtime caused by external impurities or collisions. This improves the reliability and stability of the screening device and reduces maintenance costs.

[0035] In a further preferred embodiment of the present invention, an isolation plate is detachably installed on the filter box 14 by bolts, and a filter bag for separating dust is installed on the isolation plate, the filter bag being located inside the filter box 14.

[0036] In this embodiment, the design of the isolation plate keeps the filter box 14 closed, while providing convenience for the installation and replacement of the filter bag. Through the detachable design of the bolts and other connecting parts, the user can easily remove and install the isolation plate, thereby facilitating the cleaning of the inside of the filter box 14 or the replacement of the filter bag, improving the maintainability of the equipment. The design of the filter bag allows dust and fine particles to be effectively trapped on the surface of the filter bag when passing through the filter box 14, thereby achieving dust separation and purification. This filtration method not only improves the dust removal efficiency, but also reduces the burden on equipment such as the fan 13 and extends the service life of the equipment.

[0037] In a further preferred embodiment of this utility model, the guide plate 4 is L-shaped, and both sides of the guide plate 4 are provided with side plates for preventing recycled concrete aggregate from falling. The first conveyor belt 2 and the second conveyor belt 3 are in contact with the inner wall of the box body 1.

[0038] In this embodiment, the guide plate 4 is designed in an L-shape to guide the flow of recycled concrete aggregate during the screening process. The L-shaped guide plate 4 can not only effectively guide the aggregate to flow along the predetermined path, but also prevent the aggregate from accumulating or scattering during the flow. This design helps to improve the continuity and stability of the screening process, thereby improving screening efficiency and quality. The side plate design effectively avoids the loss and waste of aggregate during the discharge process, and also reduces pollution of the screening environment. In addition, the side plate can also increase the structural strength of the guide plate 4 to a certain extent and improve its durability. The close contact between the first conveyor belt 2 and the second conveyor belt 3 and the inner wall of the box 1 helps to reduce the leakage and scattering of aggregate during the conveying process, thereby keeping the screening environment clean. At the same time, this design also helps to improve the stability and efficiency of the conveying, ensuring that the aggregate can be smoothly conveyed from one end to the other end to complete the screening process.

[0039] In summary, compared with related technologies, this device improves the stability and accuracy of the screening process, reduces external interference and dust pollution, and achieves full turning and graded discharge of aggregates through the design of the turning bar 6 and the graded guide plate 4, thereby improving screening efficiency and accuracy. At the same time, the addition of dust removal components such as the fan 13 and the filter box 14 effectively reduces dust pollution during the screening process and improves the working environment.

[0040] It should be understood, in the several embodiments provided in this application, that the disclosed apparatus may be implemented in other ways.

[0041] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A device for screening recycled concrete aggregates from hot-mix asphalt mixtures, characterized in that, include: A box (1) used to isolate the screening environment; A first conveyor belt (2) is installed inside the box (1) for screening and conveying recycled concrete aggregates, and the first conveyor belt (2) is provided with mesh. A second conveyor belt (3) is installed inside the housing (1) for conveying powder. The guide plates (4) are fixed on both sides of the box (1) for graded guidance of aggregate discharge. The guide plates (4) are located at the bottom of the first conveyor belt (2) and the second conveyor belt (3). Rotary material turning rod (6) installed inside the box (1) for turning over recycled concrete aggregate; A power assembly is installed outside the housing (1) to drive the tipping bar (6), the first conveyor belt (2), and the second conveyor belt (3).

2. The hot-mix asphalt mixture recycled concrete aggregate screening device as described in claim 1, characterized in that, The power assembly includes: A first motor (9) and a plurality of second motors (10) are fixed on the outer wall of the housing (1), and the output shafts of the plurality of second motors (10) are respectively connected to the first conveyor belt (2) and the second conveyor belt (3); The chain (8) and the sprocket (7) and chain (8) installed on the tipping rod (6) for transmission, wherein the chain (8) is sleeved on the sprocket (7) and meshes with the sprocket (7).

3. The hot-mix asphalt mixture recycled concrete aggregate screening device as described in claim 1, characterized in that, A fan (13) and a filter box (14) are installed on the housing (1). The air inlet of the fan (13) is connected to the filter box (14). Air inlet pipes (15) extending to both sides of the housing (1) are installed on both sides of the filter box (14). A dust suction pipe (16) for sucking up dust is installed on the air inlet pipe (15) located on the top of the guide plate (4).

4. The hot-mix asphalt mixture recycled concrete aggregate screening device as described in claim 1, characterized in that, A feeding hopper (5) is installed on the top of the box (1). A support shaft (11) is rotatably installed inside the feeding hopper (5). A baffle (12) for closing the feeding hopper (5) is installed on the support shaft (11). The baffles (12) are arranged in groups to maintain balance.

5. The hot-mix asphalt mixture recycled concrete aggregate screening device as described in claim 1, characterized in that, The box (1) is provided with an operating port, and a protective door (18) for closing the operating port is hinged to the box (1). A limiting plate (20) is rotatably installed on the protective door (18), and a clamping plate (19) is installed on the box (1). The limiting plate (20) can be clamped in the clamping plate (19).

6. The hot-mix asphalt mixture recycled concrete aggregate screening device as described in claim 2, characterized in that, The turning rod (6) is fixed with an extension rod (17) for pushing and mixing recycled concrete aggregate. An elastic sleeve is fixedly fitted on the extension rod (17). Protective shells are fixedly fitted on the outside of the first motor (9) and the second motor (10).

7. The hot-mix asphalt mixture recycled concrete aggregate screening device as described in claim 3, characterized in that, An isolation plate is detachably installed on the filter box (14) by bolts, and a filter bag for separating dust is installed on the isolation plate. The filter bag is located inside the filter box (14).

8. The hot-mix asphalt mixture recycled concrete aggregate screening device as described in claim 1, characterized in that, The guide plate (4) is L-shaped, and both sides of the guide plate (4) are provided with side plates for preventing recycled concrete aggregate from falling. The first conveyor belt (2) and the second conveyor belt (3) are in contact with the inner wall of the box (1).

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