A drum screen structure

Abstract

The utility model discloses a kind of drum screen structure, including screen body and the screen cylinder of coaxial installation in screen body, annular cavity is equipped between the opposite surface of screen cylinder outer periphery and screen body inner wall, support framework is equipped in screen cylinder, and screen cylinder is fixed to the surface of rotating shaft, the output shaft of driving motor is connected with the outer periphery of screen body that one end of rotating shaft penetrates, driving motor is installed on the mounting base of screen body end portion setting, the top side of screen cylinder is located in annular cavity and is equipped with cleaning assembly, for removing the material adhered on screen cylinder surface;Cleaning assembly includes at least one of blowing and purging mechanism, knocking mechanism or cleaning mechanism.The utility model is at least one kind of effect on screen cylinder surface in blowing and purging mechanism, knocking mechanism, cleaning mechanism, can remove adhered material in time, prevent screen cylinder from being blocked, maintain the screening performance of screen cylinder stable, ensure screening precision, make screening result meet expected standard.

Description

Technical Field

[0001] This utility model relates to the field of screening equipment technology, specifically a drum-type screen structure. Background Technology

[0002] Existing ultrafine powders are mainly produced from metal and non-metal minerals and organic matter. During the granulation process using chemical synthesis methods, the finished product must be separated from the recycled material (particle size larger than the standard requirement) for post-processing. The recycled material is then combined with the raw materials for reprocessing.

[0003] Currently, most screening devices such as vibrating screens and drum screens are used for screening and separation. For example, the existing Chinese invention patent with publication number CN108927317B discloses a drum screening device for powder screening. It adds a cleaning comb plate to the inside of the drum to clean the powder accumulated inside the drum, so that the powder is spread as flat as possible on the screen surface to improve the screening effect.

[0004] However, after ultrafine powder is granulated in a rotary kiln, its surface will contain a certain amount of moisture. When using the aforementioned drum screen for material separation, this moisture will increase the material's viscosity, making it very easy for it to adhere to the screen surface. As more material adheres, it will further clog the mesh, ultimately severely deteriorating the separation effect of the drum screen and making it difficult to meet the expected screening requirements. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a drum-type screen structure to solve the technical problems mentioned in the prior art.

[0006] A drum-type screen structure includes a screen body and a screen cylinder coaxially mounted inside the screen body. An annular cavity is provided between the outer periphery of the screen cylinder and the opposing surface of the inner wall of the screen body. A rotating shaft and a support frame for fixing the screen cylinder to the surface of the rotating shaft are provided inside the screen cylinder. One end of the rotating shaft passes through the outer periphery of the screen body and is connected to the output shaft of a drive motor. The drive motor is mounted on a mounting base provided at the end of the screen body. A cleaning component is provided on the top side of the screen cylinder within the annular cavity for removing material adhering to the surface of the screen cylinder.

[0007] The cleaning assembly includes at least one of a blowing mechanism, a knocking mechanism, or a sweeping mechanism.

[0008] Optionally, the purging mechanism includes:

[0009] An air guide duct is provided in the annular cavity. The air inlet end of the air guide duct passes through the screen body and extends to the outside of the screen body, where an air supply unit is provided. Multiple sets of blowing holes are opened on the outer periphery of the air guide duct facing the screen cylinder.

[0010] The air supply unit is configured as an induced draft fan or a high-pressure air storage tank.

[0011] Optionally, the striking mechanism includes:

[0012] The fixing part is installed on the inner wall of the screen body;

[0013] The striking part is attached to the outer surface of the sieve cylinder;

[0014] An elastic connecting part, the two ends of which are connected to the fixing part and the striking part.

[0015] Optionally, the cleaning mechanism includes a cleaning brush installed in the annular cavity, the bristles of the cleaning brush being in close contact with the outer surface of the screen cylinder.

[0016] Optionally, the top side of the screen body is provided with an installation groove, and an installation plate can be detachably installed in the installation groove;

[0017] The blowing mechanism, the knocking mechanism, and the cleaning mechanism are integrated and mounted on the mounting plate.

[0018] Optionally, an exhaust port is provided on the top side of the outer periphery of the screen body.

[0019] Optionally, both ends of the screen cylinder are rotatably connected to the inner wall of the screen body, and the side walls of the screen cylinder are all screen mesh structures.

[0020] Optionally, the outer periphery or end of the sieve body is provided with:

[0021] The hopper has a discharge section that penetrates the screen body and communicates with the inner cavity of the screen cylinder.

[0022] The first discharge pipe has its feed end penetrating through the screen body and communicating with the lowest part of the annular cavity at the horizontal plane.

[0023] The second discharge pipe; the feed end of the second discharge pipe passes through the screen body and is connected to the lowest part of the screen cylinder cavity at the horizontal plane;

[0024] Both the first discharge pipe and the second discharge pipe are equipped with a switch valve at their inlet ends.

[0025] The beneficial effects that this utility model can produce include:

[0026] This utility model provides a drum-type screen structure with a cleaning component on the outer periphery of the screen cylinder. At least one of the blowing, tapping, and sweeping mechanisms in the cleaning component acts on the screen cylinder surface, promptly removing adhering materials, preventing screen cylinder blockage, maintaining stable screening performance, ensuring screening accuracy, and ensuring screening results meet expected standards. Simultaneously, the exhaust port on the top side of the screen body discharges moisture from the material surface during the blowing mechanism's operation, reducing material viscosity, minimizing material agglomeration, and facilitating subsequent screening and separation, further improving the screening effect. Furthermore, the blowing, tapping, and sweeping mechanisms of the cleaning component are integrated into a detachable mounting plate within a mounting groove on the top side of the screen body, facilitating overall replacement and maintenance, reducing maintenance difficulty and cost, shortening equipment downtime for maintenance, and improving equipment efficiency. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a drum-type screen structure according to the present invention;

[0028] Figure 2 In this utility model Figure 1 A schematic diagram of the internal structure of the sieve body;

[0029] Figure 3 In this utility model Figure 2 A schematic diagram of the cleaning component;

[0030] In the diagram: 1. Screen body, 2. Screen cylinder, 3. Annular cavity, 4. Rotating shaft, 5. Support frame, 6. Drive motor, 7. Cleaning assembly, 8. Air guide pipe, 9. Blowing hole, 10. Air supply unit, 11. Fixing part, 12. Striking part, 13. Elastic connection part, 14. Cleaning brush, 15. Mounting plate, 16. Exhaust port, 17. Hopper, 18. First discharge pipe, 19. Second discharge pipe. Detailed Implementation

[0031] 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.

[0032] Please see Figure 1 and Figure 2As shown, this utility model provides a drum-type screen structure, including a screen body 1 and a screen cylinder 2 coaxially mounted inside the screen body 1. An annular cavity 3 is provided between the outer periphery of the screen cylinder 2 and the opposing surface of the inner wall of the screen body 1. A rotating shaft 4 and a support frame 5 fixing the screen cylinder 2 to the surface of the rotating shaft 4 are provided inside the screen cylinder 2. To enhance the pressure-bearing strength of the screen cylinder 2, multiple sections of angle iron are typically welded circumferentially along the outer periphery of the support frame 5 to form screen plates, thereby reinforcing the screen cylinder 2 through the screen plates. One end of the rotating shaft 4 passes through the outer periphery of the screen body 1 and is connected to the output shaft of a drive motor 6. The drive motor 6 is fixedly mounted on a mounting base provided at the end of the screen body 1, providing power for the rotation of the screen cylinder 2. It should be noted that, as Figure 1 As shown, when the structural design dimensions of the screen body 1 are too large, the drive motor 6 cannot effectively drive the screen cylinder 2 to rotate. Therefore, a corresponding gear transmission box is usually added according to the transmission ratio to connect the output shaft of the drive motor 6 with the power input end of the rotating shaft 4 to achieve speed adjustment and ensure stable rotation of the screen cylinder 2. On the top side of the screen cylinder 2, a cleaning component 7 is provided in the annular cavity 3. The cleaning component 7 includes at least one of a blowing mechanism, a knocking mechanism, or a sweeping mechanism, which can effectively remove the material adhering to the surface of the screen cylinder 2, ensure the screening effect of the screen cylinder 2, and meet the expected screening requirements.

[0033] In the above, such as Figure 3 As shown, the purging mechanism includes an air guide pipe 8, which is located within the annular cavity 3. The air inlet end of the air guide pipe 8 penetrates the screen body 1 and extends to the outside of the screen body 1, where an air supply unit 10 is provided. The air supply unit 10 is configured as an induced draft fan or a high-pressure air tank. Multiple sets of purging holes 9 are evenly distributed around the outer periphery of the air guide pipe 8 towards the screen cylinder 2. During the material screening process, the air supply unit 10 delivers purging airflow into the air guide pipe 8. The airflow is sprayed onto the surface of the screen cylinder 2 through the purging holes 9 to clean the screen cylinder 2. In addition, an exhaust port 16 is provided on the top side of the outer periphery of the screen body 1, which can ensure stable air pressure inside the screen body 1 and simultaneously discharge moisture detached from the material surface with the air, reducing material viscosity and improving subsequent separation effect.

[0034] In the above, such as Figure 3 As shown, the striking mechanism includes a fixing part 11, a striking part 12, and an elastic connecting part 13. The fixing part 11 is installed on the inner wall of the screen body 1, the striking part 12 is attached to the outer surface of the screen cylinder 2, and the two ends of the elastic connecting part 13 connect the fixing part 11 and the striking part 12. The elastic connecting part 13 can be a spring plate, and the striking part 12 and the elastic connecting part 13 are integrally formed. When the screen cylinder 2 rotates, it will continuously touch the striking part 12, causing it to swing back and forth. Under the elastic action of the elastic connecting part 13, the striking force of the striking part 12 on the screen cylinder 2 is enhanced, thereby effectively knocking off the material adhering to the surface of the screen cylinder 2.

[0035] In the above, such as Figure 3 As shown, the cleaning mechanism includes a cleaning brush 14 installed in the annular cavity 3. The bristles of the cleaning brush 14 are closely attached to the outer surface of the screen cylinder 2, so that when the screen cylinder 2 rotates, the cleaning brush 14 can automatically clean the surface of the screen cylinder 2 and maintain the screening performance of the screen cylinder 2.

[0036] In this embodiment, as Figure 2 and Figure 3 As shown, the top side of the screen body 1 is provided with an installation groove, and the installation plate 15 can be detachably installed in the installation groove; the blowing mechanism, the knocking mechanism and the cleaning mechanism are installed on the installation plate 15 in one piece, which facilitates the replacement and maintenance of the cleaning component 7, and the reasonable layout also reduces the installation space required for the cleaning component 7.

[0037] Furthermore, both ends of the screen cylinder 2 are rotatably connected to the inner wall of the screen body 1, and the side walls of the screen cylinder 2 are all screen mesh structures, which enable it to continuously perform screening operations during rotation, greatly improving screening efficiency.

[0038] Furthermore, such as Figure 1 and Figure 2 As shown, the outer periphery or end of the screen body 1 is equipped with a hopper 17, a first discharge pipe 18, and a second discharge pipe 19. The discharge part of the hopper 17 passes through the screen body 1 and communicates with the inner cavity of the screen cylinder 2, and is used to transport materials into the screen cylinder 2. The feed end of the first discharge pipe 18 passes through the screen body 1 and communicates with the lowest position of the annular cavity 3 on the horizontal plane, and is used to discharge the fine particles obtained by screening. The feed end of the second discharge pipe 19 passes through the screen body 1 and communicates with the lowest position of the inner cavity of the screen cylinder 2 on the horizontal plane, and is used to discharge the larger particles obtained by screening. The feed ends of the first discharge pipe 18 and the second discharge pipe 19 are each equipped with a switch valve, which is used to control the opening and closing of the first discharge pipe 18 and the second discharge pipe 19.

[0039] For example, during the sieving process of ultrafine powder, the first discharge pipe 18 is opened by switching the valve and the second discharge pipe 19 is closed, so that the finished product obtained by sieving in the annular cavity 3 is quickly discharged through the first discharge pipe 18. After sieving, the second discharge pipe 19 is opened to discharge the returned material in the screen cylinder 2 through the second discharge pipe 19, thereby realizing the graded output of the material.

Claims

1. A drum-type screen structure, comprising a screen body (1) and a screen cylinder (2) coaxially mounted inside the screen body (1), wherein an annular cavity (3) is provided between the outer periphery of the screen cylinder (2) and the opposing surface of the inner wall of the screen body (1), a rotating shaft (4) and a support frame (5) for fixing the screen cylinder (2) to the surface of the rotating shaft (4) are provided inside the screen cylinder (2), one end of the rotating shaft (4) passes through the outer periphery of the screen body (1) and is connected to the output shaft of a drive motor (6), the drive motor (6) is mounted on a mounting base provided at the end of the screen body (1), characterized in that, The top side of the screen cylinder (2) is provided with a cleaning component (7) located in the annular cavity (3) for removing the material adhering to the surface of the screen cylinder (2); The cleaning component (7) includes at least one of a blowing mechanism, a knocking mechanism, or a sweeping mechanism.

2. The drum-type screen structure according to claim 1, characterized in that, The purging mechanism includes: An air duct (8) is provided in the annular cavity (3). The air inlet end of the air duct (8) passes through the screen body (1) and extends to the outside of the screen body (1) and is equipped with an air supply unit (10). The outer periphery of the air duct (8) is provided with multiple sets of purge holes (9) facing the screen cylinder (2). The air supply unit (10) is configured as an induced draft fan or a high-pressure air storage tank.

3. The drum-type screen structure according to claim 1, characterized in that, The striking mechanism includes: A fixing part (11) is installed on the inner wall of the sieve body (1); The striking part (12) is attached to the outer surface of the sieve cylinder (2); The elastic connecting part (13) connects the fixing part (11) and the striking part (12) at both ends.

4. The drum-type screen structure according to claim 1, characterized in that, The cleaning mechanism includes a cleaning brush (14) installed in the annular cavity (3), and the bristles of the cleaning brush (14) are in close contact with the outer surface of the screen cylinder (2).

5. The drum-type screen structure according to claim 1, characterized in that, The top side of the sieve body (1) is provided with an installation groove, and an installation plate (15) can be detachably installed in the installation groove; The blowing mechanism, the knocking mechanism and the cleaning mechanism are installed as a whole on the mounting plate (15).

6. The drum-type screen structure according to claim 2, characterized in that, An exhaust port (16) is provided on the top side of the outer periphery of the sieve body (1).

7. The drum-type screen structure according to claim 1, characterized in that, The two ends of the sieve cylinder (2) are rotatably connected to the inner wall of the sieve body (1), and the side walls of the sieve cylinder (2) are all sieve mesh structures.

8. The drum-type screen structure according to claim 1, characterized in that, The outer periphery or end of the sieve body (1) is provided with: The hopper (17) has a discharge section that passes through the screen body (1) and communicates with the inner cavity of the screen cylinder (2); The first discharge pipe (18) has its feed end passing through the screen body (1) and communicating with the lowest part of the annular cavity (3) at the horizontal plane. The second discharge pipe (19) has its feed end passing through the screen body (1) and communicating with the lowest part of the screen cylinder (2) at the horizontal plane. Both the first discharge pipe (18) and the second discharge pipe (19) are equipped with a switch valve at their inlet ends.

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