Anti-blocking device for roller screen

Abstract

The utility model belongs to the technical field of aluminum ash treatment equipment, and particularly relates to a roller screen anti-blocking device which comprises a bracket and a roller screen drum above the bracket, a sweeping anti-blocking piece is arranged on one side of the roller screen drum, a beating piece and a driving device are further arranged on the bracket, and the driving device is used for driving the roller screen drum to rotate. The sweeping anti-blocking piece comprises a scraper, a brush and a rolling brush which are sequentially arranged in the rotating direction of the roller screen drum, the scraper and the rolling brush are located on the inner side of the roller screen drum, the brush is located on the outer side of the roller screen drum, connecting plates are arranged at the two ends of the roller screen drum, the scraper and the brush are fixedly arranged between the two connecting plates, and the rolling brush is rotationally arranged between the two connecting plates; one side of the scraper is in contact with the inner side wall of the roller screen drum. According to the roller screen, the scraping plate is arranged in the roller screen and used for scraping materials attached to the inner wall of the roller screen, then the materials in the screen holes are ejected out through the brush, the screen holes are further guaranteed to be dredged through the roller brush, and then the material screening efficiency is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the technical field of aluminum ash processing equipment, specifically relating to a roller screen anti-clogging device. Background Technology

[0002] In the aluminum ash processing, aluminum ash is usually mixed with water and put into a reaction tank for reaction. The slurry after reaction is pumped out by a vacuum belt conveyor to the ash cake with a moisture content of about 28% for drying. After drying to the alumina powder with a moisture content of less than 1%, it is directly put into a rotary screen for screening. The qualified alumina powder with smaller particle size falls directly into the pipeline and is blown to the ash silo by a Roots blower. The unqualified products with larger particle size are crushed by a crusher and then transported to the ash silo for storage.

[0003] Because the dried alumina powder is quite fine, it tends to adhere to the inner wall or screen holes of the sluice when passing through the sluice. This can easily cause the sluice to become clogged, and some material may remain inside the sluice, making it difficult to process later. Summary of the Invention

[0004] This invention addresses the problem that when screening alumina powder using existing rotary screens, the powder tends to adhere to the inner wall or screen holes, causing blockages and leaving some material residue that hinders subsequent processing. The invention provides a rotary screen anti-blocking device that uses scrapers inside the screen to remove material adhering to the inner wall. A brush then pushes the material out of the screen holes, further ensuring unobstructed flow and thus guaranteeing efficient material screening.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A rotary screen anti-clogging device includes a bracket and a rotary screen cylinder above it. A cleaning and anti-clogging component is provided on one side of the rotary screen cylinder. A flapping component and a driving device are also provided on the bracket. The driving device is used to drive the rotary screen cylinder to rotate. The cleaning and anti-clogging component includes a scraper, a brush, and a roller brush arranged sequentially along the rotation direction of the rotary screen cylinder. The scraper and roller brush are located inside the rotary screen cylinder, and the brush is located outside the rotary screen cylinder. Connecting plates are provided at both ends of the rotary screen cylinder. The scraper and brush are fixedly arranged between the two connecting plates, and the roller brush is rotatably arranged between the two connecting plates. One side of the scraper contacts the inner wall of the rotary screen cylinder. The scraper scrapes off the material adhering to the inner wall of the rotary screen cylinder, and the brush and roller brush work together to unclog the screen holes, effectively preventing clogging.

[0007] Preferably, a box with a lower opening is fixedly installed on the bracket, and a cylindrical body is rotatably installed at both ends of the box. The two cylindrical bodies are respectively fixedly sleeved on both ends of the rotary screen cylinder. The rotary screen cylinder passes through the box, and the connecting plates are all fixedly connected to the box. The rotary screen cylinder is covered by the box and the cylindrical bodies to prevent the material from forming dust and scattering.

[0008] Preferably, rollers are provided on both sides of the bottom of the cylinder, and the rollers are mounted on the bracket to support the cylinder.

[0009] Preferably, the driving device includes a gear ring, a motor, and a gear, wherein a gear ring is fixedly sleeved on one of the cylinders, a motor is fixedly mounted on the bracket, a gear is fixedly connected to the output end of the motor, the gear meshes with the gear ring, and the motor drives the gear to rotate the gear ring.

[0010] Preferably, the striking component includes a motor, an eccentric wheel, a support block, an end plate, a slider, and a striking hammer. The motor and the support block are fixedly mounted on the bracket. The output end of the motor is fixedly connected to the eccentric wheel. The end plate is fixedly mounted on the support block, and the slider is slidably mounted thereon. A spring is fixedly mounted between the slider and the end plate. The slider is in corresponding contact with the eccentric wheel and slides under the action of the eccentric wheel. The striking hammer is fixedly connected to the slider. The motor drives the striking hammer to move closer to or further away from the corresponding cylinder. The motor drives the eccentric wheel to rotate, and the spring, in conjunction with this, causes the slider and the striking hammer to move back and forth, continuously striking the cylinder and causing the sieve cylinder to vibrate.

[0011] Preferably, the cylinder is funnel-shaped with its wide openings facing each other, so that the screened material falls into the cylinder and slides down its inner wall.

[0012] Preferably, a material collection hopper is fixedly installed below the bracket, and the lower end of the material collection hopper is connected to the ash hopper.

[0013] Preferably, the rotary screen is inclined, and the discharge end of the rotary screen is connected to a crusher for crushing the material on the screen.

[0014] The beneficial effects of this utility model through the above technical solution are as follows:

[0015] 1. This utility model uses scrapers, brushes, and roller brushes arranged sequentially along the rotation direction of the rotary screen cylinder to scrape or sweep away materials adhering to the inner wall of the rotary screen cylinder and inside the screen holes, effectively preventing clogging of the screen holes and improving the material screening effect and efficiency. It also avoids material residue inside the rotary screen, which can cause subsequent processing problems and reduce output.

[0016] 2. In the process of rotating the drum screen, the scraper set on the inner side of the drum screen first scrapes off the material adhering to the inner wall of the drum screen, so as to avoid the material remaining on the inner wall of the drum screen, which would affect the material screening effect, reduce the output of the material, and cause difficulties in subsequent drum screen processing.

[0017] Then, the brushes installed on the outside of the rotary screen cylinder push the bristles against the outer wall of the rotary screen cylinder. As the rotary screen cylinder rotates, the bristles push the residual material in the screen holes from the outer wall of the rotary screen cylinder to the screen holes, thus cleaning the screen holes of the rotary screen cylinder and preventing the material from clogging the screen holes.

[0018] Then, the brushes installed inside the drum screen rotate, and the brush bristles are inserted into the screen holes. As the drum screen rotates, the brushes also rotate, and the brush bristles are continuously inserted into and pulled out of the screen holes of the drum screen, effectively preventing the drum screen from clogging.

[0019] By using a combination of brushes and rollers, the problem of material being squeezed into the screen holes and causing more serious blockage is avoided when the scraper removes material adhering to the inner wall of the roller screen cylinder.

[0020] 3. This utility model enables the motor to drive the eccentric wheel to rotate while driving the rotary screen cylinder to rotate. In conjunction with the end plate and spring, the slider moves back and forth along the direction of approaching and moving away from the corresponding cylinder body, thereby driving the hammer to continuously strike the cylinder body, causing the rotary screen cylinder to vibrate and shaking off the material adhering to its surface, thus further preventing the material from adhering to the surface of the rotary screen cylinder and the clogging of its screen holes. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0022] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0023] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle.

[0024] Figure 4 This is a schematic diagram of the structure of the striking component of this utility model.

[0025] Figure 5 This is a schematic diagram of the cleaning and anti-clogging component of this utility model.

[0026] Figure 6 This is a schematic diagram of the scraper of this utility model.

[0027] The attached diagram is labeled as follows: 1 is bracket, 2 is rotary screen cylinder, 3 is scraper, 4 is brush, 5 is roller brush, 6 is connecting plate, 7 is box body, 8 is cylinder body, 9 is gear ring, 10 is motor, 11 is gear, 12 is eccentric wheel, 13 is support block, 14 is end plate, 15 is slider, 16 is striking hammer, 17 is spring, 18 is collection hopper, and 19 is roller. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0029] like Figures 1-6As shown, this embodiment provides a rotary screen anti-clogging device, including a bracket 1 and a rotary screen cylinder 2 above it. The rotary screen cylinder 2 is provided with screen holes. After the material enters the rotary screen cylinder 2, the material is screened as the rotary screen cylinder 2 rotates. A box 7 with a lower opening is fixedly installed on the bracket 1. Two cylinders 8 are rotatably installed at both ends of the box 7. The two cylinders 8 are respectively fixedly sleeved at both ends of the rotary screen cylinder 2. The rotary screen cylinder 2 passes through the box 7 and the cylinders 8 are installed through the box 7. The rotary screen cylinder 2 is rotated by rotating the cylinders 8 to complete the material screening work. Rollers 19 are provided on both sides of the bottom of the cylinder 8. The rollers 19 are set on the bracket 1 and support the cylinder 8 through the rollers 19, thereby completing the support of the rotary screen cylinder 2.

[0030] like Figure 1 As shown, the bracket 1 is also equipped with a striking component and a driving device. The driving device is used to drive the rotary screen cylinder 2 to rotate. The driving device includes a gear ring 9, a motor 10 and a gear 11. The gear ring 9 is fixedly sleeved on one of the cylinder bodies 8. The motor 10 is fixedly installed on the bracket 1. The output end of the motor 10 is fixedly connected to the gear 11. The gear 11 meshes with the gear ring 9. The motor 10 drives the gear 11 to rotate, which in turn drives the meshing gear ring 9 to rotate, thereby driving the cylinder body 8 and the rotary screen cylinder 2 to rotate.

[0031] like Figure 4 As shown, the striking component includes a motor 10, an eccentric wheel 12, a support block 13, an end plate 14, a slider 15, and a striking hammer 16. The motor 10 and support block 13 are fixedly mounted on the bracket 1. The output end of the motor 10 is fixedly connected to the eccentric wheel 12. The striking component and the driving device share a single motor 10; that is, a gear 11 and an eccentric wheel 12 are sequentially fixedly connected to the output shaft of the motor 10. The motor 10 drives the eccentric wheel 12 to rotate. The end plate 14 is fixedly mounted on the support block 13, and a slider 15 is slidably mounted thereon. A spring 17 is fixedly mounted between the slider 15 and the end plate 14. As the eccentric wheel 12 rotates, the slider 15 reciprocates in conjunction with the spring 17. The slider 15 contacts the eccentric wheel 12 and slides under the action of the eccentric wheel 12. The slider is fixedly connected to a striking hammer 16. The motor 10 drives the striking hammer 16 to move closer to or away from the corresponding cylinder 8. During the reciprocating sliding of the slider 15, the striking hammer 16 moves back and forth, continuously striking the cylinder 8, causing the cylinder 8 and its inner roller screen 2 to vibrate continuously, thereby shaking off the material adhering to its surface. This avoids material residue during the screening process and reduces the probability of clogging of the screen holes in the roller screen 2.

[0032] In one possible implementation, the cylinder 8 is connected to the rotary screen cylinder 2 via a spring telescopic rod. Specifically, a telescopic cylinder is fixedly installed on the inner wall of the cylinder 8, and a rod is sleeved on the other end of the telescopic cylinder. The end of the rod is fixedly connected to the outer wall of the rotary screen cylinder 2. A telescopic spring is installed inside the telescopic cylinder, and the telescopic spring is located between the rod and the inner wall of the cylinder 8. This further improves the vibration effect of the rotary screen cylinder 2 during the operation of the striking component.

[0033] A cleaning and anti-clogging component is provided on one side of the rotary screen cylinder 2 to clean the material adhering to the inner wall and screen holes of the rotary screen cylinder 2. The cleaning and anti-clogging component includes a scraper 3, a brush 4, and a roller brush 5 arranged sequentially along the rotation direction of the rotary screen cylinder 2. The scraper 3 and roller brush 5 are located on the inner side of the rotary screen cylinder 2, and the brush 4 is located on the outer side of the rotary screen cylinder 2. Connecting plates 6 are provided at both ends of the rotary screen cylinder 2. The connecting plates 6 are fixedly connected to the housing 7. The scraper 3 and brush 4 are fixedly arranged between the two connecting plates 6, and the roller brush 5 is rotatably arranged between the two connecting plates 6. One side of the scraper 6 contacts the inner wall of the rotary screen cylinder 2. As the rotary screen cylinder 2 rotates, the scraper 3 first scrapes off the material adhering to the inner wall of the rotary screen cylinder 2 to prevent material residue from remaining on the inner wall of the rotary screen cylinder and affecting the material. The screening effect is reduced, resulting in a decrease in the output of material and difficulties in subsequent drum screen processing. During this process, scraped material may adhere to the screen holes of the drum screen cylinder 2, causing screen hole blockage. Therefore, the bristles of the brush 4 are pressed against the outer wall of the drum screen cylinder 2. As the drum screen cylinder 2 rotates, the bristles of the brush 4 move from pressing against the outer wall of the drum screen cylinder 2 to extending into the screen hole, ejecting the residual material in the screen hole and dropping it onto the inner side of the drum screen cylinder 2, cleaning the screen hole of the drum screen cylinder 2 and preventing material blockage. However, the cleaning by the brush 4 cannot guarantee a good cleaning of the screen hole of the drum screen 2. Therefore, during the rotation of the roller brush 5, its bristles continuously enter and leave the screen hole of the drum screen cylinder 2, further unblocking the screen hole and ensuring the smooth progress of the screening operation.

[0034] As one possible implementation, this utility model is used for screening alumina powder in the aluminum ash treatment process. The rotary screen 2 is inclined and its feed end is connected to a drying device to receive the dried alumina powder and then screen it. A collection hopper 18 is fixedly installed below the bracket 1. The lower end of the collection hopper 18 is connected to the ash hopper (not shown in the figure) through a pipe. The screened material with qualified particle size falls into the collection hopper 18 and is blown to the ash hopper for storage through the pipe using a Roots blower. The discharge end of the rotary screen 2 is connected to a crusher. The screened material (i.e., unqualified alumina powder with larger particle size) is directly discharged to the crusher for crushing. After its particle size meets the requirements, it is transported to the ash hopper for storage.

[0035] In one possible implementation, the cylinder 8 is trumpet-shaped with its large openings facing each other (not shown in the figure), so that the material under-screened by the roller screen 2 corresponding to the cylinder 8 falls into the collection hopper 18 through the inclined inner wall of the cylinder 8.

[0036] In use (taking the screening of alumina powder with a moisture content of less than 1% after aluminum ash treatment as an example), the material enters the rotary screen cylinder 2 from the drying equipment. The motor 10 drives the rotary screen cylinder 2 to rotate and screen the material. The qualified particles fall into the collection hopper 18 and are transported to the ash hopper for storage. The unqualified products with larger particle sizes are discharged along the inclined rotary screen cylinder 2 to the crushing equipment for crushing and then transported to the ash hopper for storage.

[0037] During the operation of the rotary screen cylinder 2, as the rotary screen cylinder 2 rotates, the scraper 3 first scrapes the material from the inner wall of the rotary screen cylinder 2 to prevent the material from sticking to the inner wall of the rotary screen cylinder 2. Then, the brush 4 conveys the material through the screen holes of the rotary screen cylinder 2. Subsequently, the rotating brush 5 further unblocks the screen holes of the rotary screen cylinder 2, effectively reducing the probability of screen hole blockage in the rotary screen cylinder 2.

[0038] While the motor 10 drives the rotary screen cylinder 2 to rotate, it also drives the striking component to work. Using the eccentric wheel 12 and the spring 17, the slider 15 moves one side closer to and away from the end plate 14, while the other side, with the striking hammer 16, continuously strikes the cylinder 8. This causes the cylinder 8 and the inner rotary screen cylinder 2 to vibrate, shaking off the material adhering to the rotary screen cylinder 2 and reducing the amount of material adhering to the rotary screen cylinder 2, thereby further preventing the screen hole blockage problem.

[0039] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A rotary screen anti-clogging device, characterized in that, Includes a bracket (1) and a rotary screen cylinder (2) above it. A cleaning and anti-clogging component is provided on one side of the rotary screen cylinder (2). A beater and a driving device are also provided on the bracket (1). The driving device is used to drive the rotary screen cylinder (2) to rotate. The cleaning and anti-clogging component includes a scraper (3), a brush (4) and a roller brush (5) arranged sequentially along the rotation direction of the rotary screen cylinder (2). The scraper (3) and the roller brush (5) are located inside the rotary screen cylinder (2), and the brush (4) is located outside the rotary screen cylinder (2). Connecting plates (6) are provided at both ends of the rotary screen cylinder (2). The scraper (3) and the brush (4) are fixedly arranged between the two connecting plates (6), and the roller brush (5) is rotatably arranged between the two connecting plates (6). One side of the scraper (3) contacts the inner wall of the rotary screen cylinder (2).

2. The anti-clogging device for a rotary screen according to claim 1, characterized in that, The bracket (1) is fixedly provided with a box (7) with a lower opening. The two ends of the box (7) are rotatably provided with cylinders (8). The two cylinders (8) are respectively fixedly sleeved on both ends of the sieve cylinder (2). The sieve cylinder (2) passes through the box (7). The connecting plates (6) are all fixedly connected to the box (7).

3. The anti-clogging device for a rotary screen according to claim 2, characterized in that, Rollers (19) are provided on both sides of the bottom of the cylinder (8), and the rollers (19) are mounted on the bracket (1).

4. The anti-clogging device for a rotary screen according to claim 2, characterized in that, The driving device includes a gear ring (9), a motor (10) and a gear (11). A gear ring (9) is fixedly sleeved on one of the cylinders (8), and a motor (10) is fixedly installed on the bracket (1). The output end of the motor (10) is fixedly connected to the gear (11), and the gear (11) meshes with the gear ring (9).

5. The anti-clogging device for a rotary screen according to claim 2, characterized in that, The striking component includes a motor (10), an eccentric wheel (12), a support block (13), an end plate (14), a slider (15), and a striking hammer (16). The motor (10) and the support block (13) are fixedly mounted on the bracket (1). The output end of the motor (10) is fixedly connected to the eccentric wheel (12). The end plate (14) is fixedly mounted on the support block (13), and the slider (15) is slidably mounted on it. A spring (17) is fixedly mounted between the slider (15) and the end plate (14). The slider (15) is in corresponding contact with the eccentric wheel (12) and slides under the action of the eccentric wheel (12). The striking hammer (16) is fixedly connected to the slider. The motor (10) drives the striking hammer (16) to move closer to or away from the corresponding cylinder (8).

6. The anti-clogging device for a rotary screen according to claim 2, characterized in that, The cylinder (8) is trumpet-shaped, with its large openings facing each other.

7. The anti-clogging device for a rotary screen according to claim 1, characterized in that, A material collection hopper (18) is fixedly installed below the bracket (1), and the lower end of the material collection hopper (18) is connected to the ash hopper.

8. The anti-clogging device for a rotary screen according to claim 1, characterized in that, The rotary screen (2) is inclined and the discharge end of the rotary screen (2) is connected to the crusher.

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