An alumina ball screening device

Abstract

This utility model relates to the technical field of screening equipment, and in particular to an alumina ball screening device; it can reduce the equipment footprint, extend the alumina ball screening path, and further improve the alumina ball screening effect and efficiency; it includes a base, a rotating shaft assembly rotatably mounted on the base, a screening mechanism mounted on the top of the rotating shaft assembly, and a rotary drive component that provides power for the rotation of the rotating shaft assembly; the screening mechanism includes a screening cylinder, a screen mesh built into the screening cylinder, and a spiral guide plate. The screen mesh divides the screening cylinder into a screening chamber and a tailings chamber from top to bottom. The screening cylinder is provided with a first discharge pipe extending tangentially into the screening chamber and a second discharge pipe extending tangentially into the tailings chamber. The spiral guide plate spirally winds from the middle of the screen mesh towards the edge of the screening cylinder near the first discharge pipe. The rotating shaft assembly includes a bushing fixedly mounted on the base, a hollow shaft rotatably mounted in the bushing, and a lifting shaft slidably mounted vertically in the hollow shaft.

Description

Technical Field

[0001] This utility model relates to the technical field of screening equipment, and in particular to an alumina ball screening device. Background Technology

[0002] Alumina balls can be used as catalyst carriers and reactor packing materials, and can also be used in wastewater treatment, waste gas treatment, and deep drying of industrial gases, and are widely used in the industrial field. To improve the particle size uniformity of alumina balls, small-diameter alumina balls need to be screened out.

[0003] For example, the utility model patent application with publication number CN217190906U discloses an activated alumina ball screening device, which includes a box body and a screening structure on the box body. The screening structure includes a first screen plate, a second screen plate, a collection box, and a bracket. Through the screening structure, it is convenient to screen the activated alumina balls in a reasonable way, and the screened balls fall and are collected, which is convenient for manual handling and for collecting activated alumina balls of different sizes.

[0004] However, the following defects were found: the screening device occupies a large area when screening the alumina balls through the first and second screens, and the smoothness of the alumina balls' movement at the first and second screens is not good. The screening efficiency and screening effect of alumina balls need to be further improved. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an alumina ball screening device that reduces the equipment footprint, extends the alumina ball screening path, and further improves the alumina ball screening effect and efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an alumina ball screening device, comprising a base, a rotating shaft assembly rotatably mounted on the base, a screening mechanism mounted on the top of the rotating shaft assembly, and a rotary drive component providing power for the rotation of the rotating shaft assembly; the screening mechanism includes a screening cylinder, a screen mesh built into the screening cylinder, and a spiral guide plate, the screen mesh dividing the screening cylinder into a screening chamber and a tailings chamber from top to bottom, the screening cylinder being provided with a first discharge pipe extending tangentially into the screening chamber and a second discharge pipe extending tangentially into the tailings chamber, the spiral guide plate being fixedly mounted on the screen mesh, the spiral guide plate spirally coiling from the middle of the screen mesh towards the edge of the screening cylinder near the first discharge pipe. Further, the rotary drive component preferably comprises a motor and a transmission component, the motor being connected to the rotating shaft assembly via the transmission component; the transmission component can be a transmission belt, transmission chain, or gear set, etc.

[0007] Preferably, the rotating shaft assembly includes a bushing fixedly mounted on a base, a hollow shaft rotatably mounted within the bushing, and a lifting shaft slidably mounted within the hollow shaft. A support plate is fixedly mounted at the bottom of the screening cylinder. The top of the lifting shaft is fixedly connected to the top of the support plate. A support member is mounted on the top of the bushing, and a ball bearing is rotatably mounted on the top of the support member. The bottom of the support plate has multiple circumferentially distributed hemispherical cavities that fit the outer diameter of the ball bearings. Furthermore, the lifting shaft can only slide up and down along the axial direction of the hollow shaft; the ball bearings are in at least two sets, and the ball bearings are circumferentially distributed around the support member; when the top of the ball bearing enters the corresponding hemispherical cavity, the bottom of the support plate is in close contact with the top of the support member.

[0008] Preferably, it also includes a cylinder cover installed on the top of the screening cylinder, the cylinder cover having a feeding hopper in the middle, the discharge end of the feeding hopper extending into the screening cylinder, and a 1-4cm gap between the discharge end of the feeding hopper and the screen.

[0009] Preferably, the support member is screwed with an adjusting bolt, and the ball bearing is rotatably mounted on the top of the adjusting bolt; further, the support member is provided with a through internal thread hole, and the adjusting bolt is screwed into the internal thread hole.

[0010] Preferably, it further includes a collection bag detachably installed at the bottom outlet of the second discharge pipe and an annular open receiving hopper for receiving alumina balls discharged from the first discharge pipe; the annular open receiving hopper has a through-hole in the middle that allows the screening cylinder to pass through, the annular open receiving hopper has a discharge port, the inner wall of the annular open receiving hopper is inclined downward toward the discharge port, and the collection bag is located inside the annular open receiving hopper.

[0011] Preferably, a retaining ring is provided at the edge of the support member, and an opening is formed between the retaining ring and the inner bottom wall of the support member.

[0012] Preferably, the inner bottom wall of the tail material cavity gradually slopes downward from the center outwards.

[0013] Preferably, a spring is installed inside the hollow shaft, one end of the spring is connected to the bottom of the lifting shaft, and the other end of the spring is connected to the inner bottom wall of the hollow shaft.

[0014] Compared with the prior art, this utility model provides an alumina ball screening device with the following beneficial effects: This alumina ball screening device places alumina balls in the middle of the screen, and the rotating drive drives the rotating shaft assembly to rotate. The screening cylinder rotates, and the centrifugal force generated during the rotation of the screening cylinder causes the alumina balls in the middle of the screen to move along the spiral guide plate. The spiral guide plate can extend the travel distance of the alumina balls on the screen, so that the large-diameter alumina balls are discharged out through the first discharge pipe, while the unsuitable small-diameter alumina balls fall into the tail chamber and are discharged through the second discharge pipe. This reduces the equipment footprint, extends the alumina ball screening path, and further improves the alumina ball screening effect and screening efficiency. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a schematic diagram of the bottom planar structure of this utility model.

[0017] Figure 3 This is the utility model Figure 2 Schematic diagram of the cross-sectional structure at point AA.

[0018] Figure 4 This is the utility model Figure 3 Schematic diagram of the cross-sectional structure at point BB.

[0019] Figure 5 This is the utility model Figure 3 Schematic diagram of the cross-sectional structure at point CC.

[0020] The following components are marked in the attached diagram: 1. Base; 2. Rotary drive component; 3. Screening cylinder; 4. Screen; 5. Spiral guide plate; 6. Screening chamber; 7. Tail chamber; 8. First discharge pipe; 9. Second discharge pipe; 10. Bushing; 11. Hollow shaft; 12. Lifting shaft; 13. Support plate; 14. Support component; 15. Ball bearing; 16. Hemispherical cavity; 17. Cylinder cover; 18. Feeding hopper; 19. Adjusting bolt; 20. Collection bag; 21. Annular open receiving hopper; 22. Retaining ring; 23. Spring. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention 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 invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0022] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] Example 1 Please refer to Figures 1-3 An alumina ball screening device includes a base 1, a rotating shaft assembly rotatably mounted on the base 1, a screening mechanism mounted on the top of the rotating shaft assembly, and a rotary drive 2 that provides power for the rotation of the rotating shaft assembly. The screening mechanism includes a screening cylinder 3, a screen 4 built into the screening cylinder 3, and a spiral guide plate 5. The screen 4 divides the screening cylinder 3 into a screening chamber 6 and a tailing chamber 7 from top to bottom. The screening cylinder 3 is provided with a first discharge pipe 8 extending tangentially into the screening chamber 6 and a second discharge pipe 9 extending tangentially into the tailing chamber 7. The spiral guide plate 5 is fixedly mounted on the screen 4 and spirally coils from the middle of the screen 4 toward the edge of the screening cylinder 3 near the first discharge pipe 8.

[0025] Furthermore, the rotary drive component 2 preferably consists of a motor and a transmission component, with the motor connected to the rotating shaft assembly via the transmission component; the transmission component can be a transmission belt, transmission chain, or gear set, etc.

[0026] For details, please refer to Figures 3-5 The rotating shaft assembly includes a bushing 10 fixedly mounted on the base 1, a hollow shaft 11 rotatably mounted within the bushing 10, and a lifting shaft 12 slidably mounted within the hollow shaft 11. A support plate 13 is fixedly mounted at the bottom of the screening cylinder 3. The top of the lifting shaft 12 is fixedly connected to the top of the support plate 13. A support member 14 is mounted on the top of the bushing 10, and a ball bearing 15 is rotatably mounted on the top of the support member 14. The bottom of the support plate 13 has multiple circumferentially distributed hemispherical cavities 16 that fit the outer diameter of the ball bearing 15. Furthermore, the lifting shaft 12 can only slide up and down along the axial direction of the hollow shaft 11; there are at least two sets of ball bearings 15, which are circumferentially distributed around the support member 14; when the top of the ball bearing 15 enters the corresponding hemispherical cavity 16, the bottom of the support plate 13 is in close contact with the top of the support member 14; the rotating drive member 2 is connected to the hollow shaft 11 for transmission.

[0027] An adjusting bolt 19 is screwed onto the support member 14, and a ball bearing 15 is rotatably mounted on the top of the adjusting bolt 19. Furthermore, the support member 14 has a through-hole with internal threads, into which the adjusting bolt 19 is screwed. A retaining ring 22 is provided at the edge of the support member 14, forming an opening between the retaining ring 22 and the inner bottom wall of the support member 14. By rotating the adjusting bolt 19, the protrusion height of the ball bearing 15 from the inner bottom wall of the support member 14 can be adaptively adjusted to adjust the amplitude of the screening cylinder 3. Lubricating oil such as grease can be injected into the opening to lubricate the area between the support member 14 and the support plate 13, as well as between the ball bearing 15 and the hemispherical cavity 16, thereby reducing friction between the components.

[0028] The inner bottom wall of the tailings chamber 7 slopes downward from the center outward. The inner bottom wall of the tailings chamber 7 is higher in the center and lower around the edges. During the rotation of the screening cylinder 3, this facilitates the movement of the tailings from the screening section in the tailings chamber 7 towards the second discharge pipe 9 under the action of centrifugal force, thereby reducing the residue of the screening tailings in the tailings chamber 7.

[0029] A spring 23 is installed inside the hollow shaft 11. One end of the spring 23 is connected to the bottom of the lifting shaft 12, and the other end of the spring 23 is connected to the inner bottom wall of the hollow shaft 11. During the rotation of the hollow shaft 11 driven by the rotary drive 2, the lifting shaft 12 rotates synchronously with the hollow shaft 11. During the rotation, the top of the ball bearing 15 frequently enters and exits the hemispherical cavity 16, causing the support plate 13 to drive the screening cylinder 3 to vibrate up and down. Under the action of the spring 23, the vibration effect of the lifting shaft 12 and the screening cylinder 3 can be further improved. Under the vibration, the alumina balls at the screen 4 can be screened, thereby improving the screening efficiency of the alumina balls, promoting further dispersion of the alumina balls, and further improving the screening effect.

[0030] The alumina ball screening device also includes a cylinder cover 17 installed on the top of the screening cylinder 3. A feeding hopper 18 is provided in the middle of the cylinder cover 17. The discharge end of the feeding hopper 18 extends into the screening cylinder 3, and a gap of 1-4 cm is left between the discharge end of the feeding hopper 18 and the screen 4. The cylinder cover 17 can prevent dust generated during screening in the screening cylinder 3 from spreading outward. Alumina balls can be placed into the feeding hopper 18, and the gap between the discharge end of the feeding hopper 18 and the screen 4 should not be too large, so that the alumina balls in the feeding hopper 18 are dispersed into the screening chamber 6, avoiding the alumina balls from falling onto the screen 4 and affecting the screening effect.

[0031] The alumina ball screening device also includes a collection bag 20 detachably installed at the bottom outlet of the second discharge pipe 9 and an annular open receiving hopper 21 for receiving alumina balls discharged from the first discharge pipe 8; the annular open receiving hopper 21 has a through-hole in the middle that allows the screening cylinder 3 to pass through, and a discharge port is provided on the annular open receiving hopper 21. The inner wall of the annular open receiving hopper 21 is inclined downward toward the discharge port side, and the collection bag 20 is located inside the annular open receiving hopper 21.

[0032] The qualified alumina balls discharged through the first discharge pipe 8 fall into the annular open receiving hopper 21. Because the bottom wall of the annular open receiving hopper 21 is inclined towards the discharge port, the alumina balls can roll towards the discharge port under the action of gravity. The unqualified small-diameter alumina balls enter the collection bag 20. After some alumina balls enter the collection bag 20, the bottom of the collection bag 20 contacts the bottom wall of the annular open receiving hopper 21. As the screening cylinder 3 rotates, the collection bag 20 rotates synchronously with the screening cylinder 3. The collection bag 20 can push the alumina balls in the annular open receiving hopper 21 to the opening, further improving the smoothness of the alumina balls in the annular open receiving hopper 21.

[0033] The alumina ball screening device provided by this utility model is used as follows: Alumina balls are placed in the feeding hopper 18. The rotating drive 2 drives the hollow shaft 11 to rotate. After being driven by the lifting shaft 12, the screening cylinder 3 rotates. Under the action of the ball bearings 15 and the hemispherical cavity 16, the screening cylinder 3 vibrates up and down while rotating. The centrifugal force generated during the rotation of the screening cylinder 3 causes the alumina balls in the middle of the screen 4 to move along the spiral guide plate 5. The spiral guide plate 5 can extend the travel distance of the alumina balls on the screen 4. The alumina balls are screened by the screen 4 under vibration and centrifugal force. Finally, the large-diameter alumina balls are discharged out through the first discharge pipe 8, while the unqualified small-diameter alumina balls fall into the tail material cavity 7 and are discharged through the second discharge pipe 9. The qualified large-diameter alumina balls are received through the annular open receiving hopper 21 and discharged out through the opening, while a small number of unqualified alumina balls enter the collection bag 20 and are collected, thus realizing the screening process of alumina balls.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. An alumina ball screening device, characterized in that, The device includes a base (1), a rotating shaft assembly rotatably mounted on the base (1), a screening mechanism mounted on the top of the rotating shaft assembly, and a rotary drive (2) that provides power for the rotation of the rotating shaft assembly. The screening mechanism includes a screening cylinder (3), a screen (4) built into the screening cylinder (3), and a spiral guide plate (5). The screen (4) divides the screening cylinder (3) into a screening chamber (6) and a tailing chamber (7) from top to bottom. The screening cylinder (3) is provided with a first discharge pipe (8) extending tangentially into the screening chamber (6) and a second discharge pipe (9) extending tangentially into the tailing chamber (7). The spiral guide plate (5) is fixedly mounted on the screen (4). The spiral guide plate (5) spirally winds from the middle of the screen (4) toward the edge of the screening cylinder (3) near the first discharge pipe (8).

2. The alumina ball screening device according to claim 1, characterized in that, The rotating shaft assembly includes a bushing (10) fixedly installed on the base (1), a hollow shaft (11) rotatably installed in the bushing (10), and a lifting shaft (12) slidably installed in the hollow shaft (11). A tray (13) is fixedly installed at the bottom of the screening cylinder (3). The top of the lifting shaft (12) is fixedly connected to the top of the tray (13). A support member (14) is installed at the top of the bushing (10). A ball bearing (15) is rotatably installed at the top of the support member (14). The bottom of the tray (13) is provided with multiple circumferentially distributed hemispherical cavities (16) that fit the outer diameter of the ball bearing (15).

3. The alumina ball screening device according to claim 2, characterized in that, It also includes a cylinder cover (17) installed on the top of the screening cylinder (3), and a feeding hopper (18) is provided in the middle of the cylinder cover (17). The discharge end of the feeding hopper (18) extends into the screening cylinder (3), and there is a 1-4cm gap between the discharge end of the feeding hopper (18) and the screen (4).

4. The alumina ball screening device according to claim 2, characterized in that, The support member (14) is screwed with an adjusting bolt (19), and the ball (15) is rotatably mounted on the top of the adjusting bolt (19).

5. The alumina ball screening device according to claim 1 or 4, characterized in that, It also includes a collection bag (20) that can be detachably installed at the bottom outlet of the second discharge pipe (9) and an annular open receiving hopper (21) for receiving alumina balls discharged from the first discharge pipe (8); the annular open receiving hopper (21) has a through-hole in the middle that allows the screening cylinder (3) to pass through, the annular open receiving hopper (21) has a discharge port, the inner wall of the annular open receiving hopper (21) is inclined downward toward the discharge port, and the collection bag (20) is located inside the annular open receiving hopper (21).

6. The alumina ball screening device according to claim 2, characterized in that, A retaining ring (22) is provided at the edge of the support (14), and an opening is formed between the retaining ring (22) and the inner bottom wall of the support (14).

7. The alumina ball screening device according to claim 1, characterized in that, The inner bottom wall of the tail material chamber (7) gradually slopes downward from the middle to the surrounding area.

8. The alumina ball screening device according to claim 2, characterized in that, A spring (23) is installed inside the hollow shaft (11). One end of the spring (23) is connected to the bottom of the lifting shaft (12), and the other end of the spring (23) is connected to the inner bottom wall of the hollow shaft (11).

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