A multi-stage screening apparatus for admixtures

Abstract

This utility model discloses a multi-stage screening device for blended materials, relating to the field of screening technology. Specifically, it is a multi-stage screening device for blended materials, including a multi-stage vibrating screen body. The multi-stage vibrating screen body contains filter plates with adjustable tilt angles. Two first support plates are fixedly connected to the right side of the multi-stage vibrating screen body. Through the coordinated arrangement of a drive column, drive cylinder, synchronous rod, first synchronous plate, and second synchronous plate, the two filter plates can synchronously adjust their tilt angles around a first rotating shaft, thereby adjusting the flow rate of the material. The baffles rotatably connected to the inner side of the filter plates ensure that they remain perpendicular to the ground by their own weight. The distance between the baffles and the inner bottom surface of the filter plates automatically adjusts with the change in the tilt angle of the filter plates. This adapts to materials with large flow rate differences and disperses accumulated materials, avoiding localized filtration dead zones, fully utilizing the effective area of ​​the filter plates, and significantly improving screening efficiency and material separation accuracy.

Description

Technical Field

[0001] This utility model relates to the field of screening technology, specifically to a multi-stage screening device for admixtures. Background Technology

[0002] Minerals are natural elements or compounds formed through geological processes. These substances not only have a relatively fixed chemical composition, but also possess a definite internal crystal structure when in the solid state, serving as the basic building blocks of rocks and ores. In the industrial field, minerals are processed into composite mineral admixtures, which are widely used in concrete modification, building material production, and other applications. Precise multi-stage screening of minerals is a key step in improving their utilization efficiency and ensuring the quality of admixtures.

[0003] Taking a multi-stage screening device for preparing composite mineral admixtures with application number 202121046956.7 as an example, this device has certain advantages in dustproof design: through the elastic force of the spring hinge, it can drive the sealing plate to tightly fit the feed hole, so that the inside of the screening box forms a relatively sealed space. This structure can effectively prevent the mineral powder generated during the screening process from flying outward, which not only reduces the risk of mineral powder being inhaled by operators and causing health problems, but also avoids material waste caused by the dispersion of fine mineral particles, and plays a positive role in protecting the operating environment and reducing raw material loss.

[0004] However, the device still has significant limitations in practical applications: the screened material cannot be discharged in real time; it can only be unpacked and retrieved after the entire screening process is completed and the machine is stopped. This operating mode not only interrupts the continuous production rhythm and reduces production efficiency, but also increases energy consumption and mechanical wear due to frequent start-ups and shutdowns. At the same time, the existing technology cannot adjust the filtration speed according to the amount of material fed, making it difficult to adapt to dynamic changes in material flow, which brings many inconveniences to operators. Utility Model Content

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a multi-stage screening device for admixtures, which solves the problems mentioned in the background section.

[0006] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a multi-stage screening device for admixtures, comprising a multi-stage vibrating screen body, wherein a filter plate capable of adjusting its tilt angle is disposed within the multi-stage vibrating screen body, two first support plates are fixedly connected to the right side of the multi-stage vibrating screen body, and a drive cylinder capable of moving up and down is disposed between the two first support plates, wherein a drive block extending into the multi-stage vibrating screen body is fixedly connected to the outer circumferential surface of the drive cylinder, a drive plate is fixedly connected to the end of the drive block away from the drive cylinder, and a synchronization rod for adjusting the tilt angle of the filter plate is fixedly connected to the side of the drive plate near the filter plate, and a baffle is rotatably connected to the middle of the inner side surface of the filter plate.

[0007] Optionally, a first rotating shaft is fixedly connected to the middle of both the left and right sides of the filter plate, and the end of the first rotating shaft away from the filter plate is rotatably connected to the inner side of the multi-stage vibrating screen body.

[0008] Optionally, a sliding port is provided at the front end of the right side of the multi-stage vibrating screen body. Two first support plates are respectively fixedly connected to the upper and lower positions of the right side of the multi-stage vibrating screen body near the sliding port. A drive column with one end inserted into the second first support plate is rotatably connected to the upper surface of the first first support plate from top to bottom. A spiral groove is provided in the middle of the drive column. The drive cylinder is sleeved in the middle of the drive column. A locking block with one end slidably connected in the spiral groove is fixedly connected to the inner circumferential surface of the drive cylinder.

[0009] Optionally, a second support plate is fixedly connected to the upper surface of the first support plate from top to bottom, and a limiting rod that can be inserted into the drive column is passed through the side of the second support plate away from the drive column. A pull plate is fixedly connected to the end of the limiting rod away from the drive column, and a tension spring with one end fixedly set on the second support plate is fixedly connected to both the front and rear ends of the pull plate near the drive column.

[0010] Optionally, guide posts are fixedly connected to both ends of the opposite surfaces of the two first support plates, and a limit plate is slidably connected to the outer circumferential surface of the guide posts. The end of the limit plate away from the guide posts is fixedly connected to the drive cylinder.

[0011] Optionally, the outer peripheral surfaces of the synchronizing rod are fixedly connected to a first synchronizing plate, and the front ends of the right sides of the two filter plates are slidably connected to a second synchronizing plate with one end facing the synchronizing rod, and the end of the first synchronizing plate away from the synchronizing rod is rotatably connected to the corresponding second synchronizing plate.

[0012] (III) Beneficial Effects This utility model provides a multi-stage screening device for admixtures, which has the following beneficial effects: This multi-stage screening equipment for blended materials, through the coordinated arrangement of a drive column, drive cylinder, synchronous rod, first synchronous plate, and second synchronous plate, enables the two filter plates to synchronously adjust their tilt angle around a first rotating shaft, thereby adjusting the flow rate of the material. The baffles connected to the inner side of the filter plates, through their own gravity, maintain a perpendicular position to the ground. They automatically adjust their distance from the bottom surface of the filter plates as the tilt angle changes, adapting to materials with significant flow rate differences and breaking up accumulated materials to avoid dead zones in filtration. This fully utilizes the effective area of ​​the filter plates, significantly improving screening efficiency and material separation accuracy. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This utility model Figure 1 Enlarged structural diagram at point A; Figure 3 This is a schematic diagram of the left-side cross-sectional structure of the multi-stage vibrating screen body of this utility model; Figure 4 This is a top view cross-sectional structural diagram of the drive column of this utility model; Figure 5 This is a schematic diagram of the structure of the filter plate of this utility model; Figure 6 This is a top view of a partial cross-sectional structure of the multi-stage vibrating screen body of this utility model.

[0014] In the diagram: 1. Multi-stage vibrating screen body; 2. First support plate; 3. Drive plate; 4. Drive column; 5. Drive cylinder; 6. Limiting plate; 7. Guide column; 8. Drive block; 9. Second support plate; 10. Limiting rod; 11. Pull plate; 12. Tension spring; 13. Limiting slot; 14. Air intake port; 15. Filter plate; 16. Baffle; 17. First synchronization plate; 18. Second synchronization plate; 19. Synchronizing rod. 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] Please see Figures 1 to 6This utility model provides a technical solution: a multi-stage screening device for admixtures, including a multi-stage vibrating screen body 1. The multi-stage vibrating screen body 1 falls within the scope of existing technology, so its working principle will not be detailed here. Simultaneously, multiple air intake ports 14 are arranged on the left side of the multi-stage vibrating screen body 1, and multiple air intake pipes are correspondingly arranged on the left side of the multi-stage vibrating screen body 1. One end of each air intake pipe is connected to the corresponding air intake port 14, and the other end is connected to a cyclone dust collector. Therefore, when the multi-stage vibrating screen body 1 is working, the cyclone dust collector can effectively remove dust from the multi-stage vibrating screen body through the air intake pipes and air intake ports 14. Dust generated within the screen body 1 is sucked in and discharged. The multi-stage vibrating screen body 1 is equipped with two filter plates 15, arranged in two layers within the body. This double-layer layout enables graded screening of materials, improving the fineness of the screening. Simultaneously, discharge plates corresponding to the two filter plates 15 are located at the front end of the multi-stage vibrating screen body 1, allowing the material filtered through the filter plates 15 to accurately slide out from the corresponding discharge plates, effectively preventing material accumulation and blockage. Furthermore, a filter plate is installed on the lower surface of the multi-stage vibrating screen body 1. The screen is equipped with a discharge hopper for centralized collection of the final screened material. A feed hopper is located at the rear end of the upper surface of the multi-stage vibrating screen body 1 to facilitate stable material introduction. Simultaneously, a sealing baffle is rotatably connected to the rear end of the left side of the multi-stage vibrating screen body 1. A second tension spring, with one end fixed to the inner top surface of the upper surface of the sealing baffle, is fixed to the rear end of the sealing baffle. The tension of the second tension spring causes the sealing baffle to seal the bottom of the feed hopper. When material enters the feed hopper, its own weight pushes the sealing baffle open. Thus, when no material enters the feed hopper, the sealing baffle remains closed. It can effectively block the dust inside the multi-stage vibrating screen body 1 from being sprayed out from the feed hopper. Two first support plates 2 are fixedly connected to the right side of the multi-stage vibrating screen body 1, and a drive cylinder 5 that can move up and down is provided between the two first support plates 2. A drive block 8 extending into the multi-stage vibrating screen body 1 is fixedly connected to the outer circumference of the drive cylinder 5. A drive plate 3 is fixedly connected to the end of the drive block 8 away from the drive cylinder 5. A synchronization rod 19 for adjusting the tilt angle of the filter plate 15 is fixedly connected to the side of the drive plate 3 near the filter plate 15. A baffle 16 is rotatably connected to the middle of the inner side of the filter plate 15. The baffle 16 is designed to remain perpendicular to the ground by gravity, adapting to changes in the tilt angle of the filter plate 15. When the filter plate 15 is tilted at a larger angle, the distance between the free end of the baffle 16 and the inner bottom surface of the filter plate 15 increases, accommodating materials with higher flow rates. When the filter plate 15 is tilted at a smaller angle, the distance between the two decreases simultaneously, preventing materials from leaking out too quickly. Simultaneously, the baffle 16 effectively disperses and evenly distributes piled-up materials, preventing localized accumulation and the formation of filtration dead zones. Combined with dynamically adjustable spacing to adapt to the material flow rhythm at different tilt angles, this ensures full utilization of the effective filtration area of ​​the filter plate 15, significantly improving screening efficiency and material separation accuracy.

[0017] A first rotating shaft is fixedly connected to the middle of both sides of the filter plate 15, and the end of the first rotating shaft away from the filter plate 15 is rotatably connected to the inner side of the multi-stage vibrating screen body 1. In addition, an elastic belt is fixedly connected to the front end of the filter plate 15, and the end of the elastic belt away from the filter plate 15 is fixedly connected to the inner front side of the multi-stage vibrating screen body 1, corresponding to the position of the discharge plate. Therefore, the material sliding down from the filter plate 15 will first pass through the elastic belt and then slide onto the discharge plate.

[0018] Please see Figures 2 to 6 A sliding port is provided at the front end of the right side of the multi-stage vibrating screen body 1. Two first support plates 2 are fixedly connected to the upper and lower positions of the right side of the multi-stage vibrating screen body 1 near the sliding port. A drive column 4 with one end inserted into the second first support plate 2 is rotatably connected to the upper surface of the first first support plate 2 from top to bottom. The bottom end of the drive column 4 is also rotatably connected to the second first support plate 2. A spiral groove is provided in the middle of the drive column 4. A drive cylinder 5 is sleeved in the middle of the drive column 4. A locking block with one end slidably connected in the spiral groove is fixedly connected to the inner circumferential surface of the drive cylinder 5. A second support plate 9 is fixedly connected to the upper surface of the first support plate 2 from top to bottom. A limiting rod 10, which can be inserted into the drive column 4, runs through the side of the second support plate 9 away from the drive column 4. The top of the drive column 4 is evenly provided with multiple limiting slots 13, which are adapted to the limiting rod 10. Therefore, when the limiting rod 10 is inserted into the limiting slot 13, the rotation of the drive column 4 can be restricted. A pull plate 11 is fixedly connected to the end of the limiting rod 10 away from the drive column 4. A tension spring 12, which is fixedly set on the second support plate 9, is fixedly connected to both the front and rear ends of the pull plate 11 on the side close to the drive column 4. Therefore, without external force intervention, the tension spring 12 provides a constant tension to the limiting rod 10 through the pull plate 11, causing the limiting rod 10 to be firmly inserted into the drive column 4, forming a reliable mechanical locking structure, which effectively restricts the rotation of the drive column 4. When it is necessary to rotate the drive column 4, the operator only needs to pull the pull plate 11 in the direction away from the drive column 4, which will drive the limiting rod 10 to smoothly disengage from the drive column 4 and release the mechanical locking state. At this time, the drive column 4 can rotate freely.

[0019] Guide posts 7 are fixedly connected to the front and rear ends of the two first support plates 2 facing each other, and a limit plate 6 is slidably connected to the outer circumferential surface of the guide posts 7. The end of the limit plate 6 away from the guide posts 7 is fixedly connected to the drive cylinder 5. Therefore, when the operator rotates the drive column 4, the drive cylinder 5 moves smoothly up and down along the axis of the drive column 4 through the cooperation of the spiral groove and the locking block. When the drive cylinder 5 moves, it drives the drive plate 3 to move up and down synchronously through the drive block 8. The drive plate 3 can completely cover the sliding port from the right side inside the multi-stage vibrating screen body 1. Therefore, the sliding port is always in a closed state during the movement of the drive plate 3, which can effectively block the path of dust leakage from the sliding port inside the multi-stage vibrating screen body 1 and reduce dust pollution to the operating environment.

[0020] The outer peripheral surface of the synchronizing rod 19 is fixedly connected to the first synchronizing plate 17. The front ends of the right sides of the two filter plates 15 are slidably connected to a second synchronizing plate 18 with one end facing the synchronizing rod 19. The end of the first synchronizing plate 17 away from the synchronizing rod 19 is rotatably connected to the corresponding second synchronizing plate 18. Therefore, when the drive plate 3 moves up and down, it will drive the synchronizing rod 19 to move synchronously. When the synchronizing rod 19 moves, it can cause the two filter plates 15 to adjust their tilt angle synchronously through the two second synchronizing plates 18.

[0021] In summary, when using this multi-stage screening equipment for blended materials, the operator can first stably introduce the blended material to be screened into the multi-stage vibrating screen body 1 from the feed hopper. After starting the multi-stage vibrating screen body 1, the material moves towards the front end of the filter plate 15 under the action of vibration. The upper filter plate 15 performs preliminary screening of the material. The material that meets the specifications passes through the filter plate 15 and falls onto the lower filter plate 15, while the material that does not meet the specifications slides along the upper filter plate 15 and is transferred to the corresponding discharge plate for discharge via the elastic belt. The lower filter plate 15 further screens the material. The material that meets the final specifications passes through the filter plate 15 and falls into the discharge hopper for centralized collection and discharge, while the remaining material slides along the lower filter plate 15 via the elastic belt to the corresponding discharge plate for discharge. When the tilt angle of the filter plate 15 needs to be adjusted, the operator pulls the pull plate 11 away from the drive column 4. The pull plate 11 drives the limit rod 10 to disengage from the drive column 4. At the same time, the tension spring 12 is stretched, releasing the lock on the drive column 4. Then the drive column 4 is rotated. The drive column 4 cooperates with the locking block on the inner circumference of the drive cylinder 5 through the spiral groove, so that the drive cylinder 5 moves up and down between the two first support plates 2 along the guide column 7 and the limit plate 6. When the drive cylinder 5 moves, it drives the drive block 8 to move synchronously. The drive block 8 drives the drive plate 3 to move up and down in the multi-stage vibrating screen body 1. The drive plate 3 drives the synchronous rod 19 to move. The synchronous rod 19 is connected to the first synchronous plate 17 and the second synchronous plate 18 through rotation, so that the two filter plates 15 can adjust their tilt angle synchronously around the first rotating shaft. During this process, the baffle 16 on the inner side of the filter plate 15 remains perpendicular to the ground due to its own weight, and automatically adjusts the distance between itself and the inner bottom surface of the filter plate 15 according to the change of the tilt angle of the filter plate 15, thus spreading the material out. At the same time, the drive plate 3 always covers the sliding port on the right side of the multi-stage vibrating screen body 1 to prevent dust leakage.

[0022] 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. A multi-stage screening plant for admixtures, comprising a multi-stage vibrating screen body (1), characterized in that: The multi-stage vibrating screen body (1) is provided with a filter plate (15) that can adjust the tilt angle. Two first support plates (2) are fixedly connected to the right side of the multi-stage vibrating screen body (1), and a drive cylinder (5) that can move up and down is provided between the two first support plates (2). A drive block (8) extending into the multi-stage vibrating screen body (1) is fixedly connected to the outer circumferential surface of the drive cylinder (5). A drive plate (3) is fixedly connected to the end of the drive block (8) away from the drive cylinder (5), and a synchronizing rod (19) for adjusting the tilt angle of the filter plate (15) is fixedly connected to the side of the drive plate (3) close to the filter plate (15). A baffle (16) is rotatably connected to the middle of the inner side of the filter plate (15).

2. The multi-stage screening equipment for admixtures according to claim 1, characterized in that: The filter plate (15) has a first rotating shaft fixedly connected to the middle of both sides, and the end of the first rotating shaft away from the filter plate (15) is rotatably connected to the inner side of the multi-stage vibrating screen body (1).

3. The multi-stage screening equipment for admixtures according to claim 1, characterized in that: The front end of the right side of the multi-stage vibrating screen body (1) is provided with a sliding port. The two first support plates (2) are respectively fixedly connected to the upper and lower positions of the right side of the multi-stage vibrating screen body (1) near the sliding port. From top to bottom, the upper surface of the first first support plate (2) is rotatably connected to a drive column (4) with one end inserted into the second first support plate (2). The middle part of the drive column (4) is provided with a spiral groove. The drive cylinder (5) is sleeved in the middle part of the drive column (4). The inner circumferential surface of the drive cylinder (5) is fixedly connected to a locking block with one end slidably connected in the spiral groove.

4. The multi-stage screening equipment for admixtures according to claim 3, characterized in that: A second support plate (9) is fixedly connected to the upper surface of the first support plate (2) from top to bottom. A limiting rod (10) with one end inserted into the drive column (4) is passed through the side of the second support plate (9) away from the drive column (4). A pull plate (11) is fixedly connected to the end of the limiting rod (10) away from the drive column (4). A tension spring (12) with one end fixedly set on the second support plate (9) is fixedly connected to both the front and rear ends of the pull plate (11) near the drive column (4).

5. The multi-stage screening equipment for admixtures according to claim 1, characterized in that: The front and rear ends of the two first support plates (2) are fixedly connected to guide columns (7), and the outer peripheral surface of the guide column (7) is slidably connected to a limit plate (6). The end of the limit plate (6) away from the guide column (7) is fixedly connected to the drive cylinder (5).

6. The multi-stage screening equipment for admixtures according to claim 1, characterized in that: The outer peripheral surface of the synchronizing rod (19) is fixedly connected to a first synchronizing plate (17), and the front ends of the right sides of the two filter plates (15) are slidably connected to a second synchronizing plate (18) with one end facing the synchronizing rod (19), and the end of the first synchronizing plate (17) away from the synchronizing rod (19) is rotatably connected to the corresponding second synchronizing plate (18).

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