Circumferential three-station arc screen

Abstract

A circumferential three-station arc screen belongs to the field of screening machinery and improves the service life of the arc screen. The arc screen comprises a screen cylinder, arc screen pieces, strip material ports, a feeding box, a screen material collecting hopper, a rotating shaft, a driving device and a support. The rotating shaft of the arc screen is located at the center line of the screen cylinder and is connected with the screen cylinder through end plates of the screen cylinder. Three strip material ports are arranged at 120 degrees along the generatrix position of the screen cylinder on the outer surface of the screen cylinder. Three arc screen pieces are arranged at 120 degrees on the circumference of the inner wall of the screen cylinder. One side of the arc screen piece is flush with one side of the strip material port, the other side of the arc screen piece is connected with the inner surface of the screen cylinder through a blocking plate, and the two ends of the arc screen piece are connected with the two end plates of the screen cylinder. Three strip screen material discharge ports are arranged along the length direction of the screen cylinder at the connecting position of the blocking plate and the screen cylinder below the arc screen piece. The arc screen has the characteristics of simple structure, high screening precision, compact occupied space and flexible operation and is suitable for a dehydration and medium removal arc screening machine.

Description

Technical Field

[0001] This utility model belongs to the field of screening machinery, and mainly relates to a three-position arc screen with a circular circumference that can quickly change the arc screen surface. Background Technology

[0002] Existing arc screens, in order to enhance dewatering and desliming effects, have screen slits arranged transversely to the material flow direction, and one corner of the screen slit is welded obliquely above the overall screen surface to achieve the purpose of cutting and screening materials. After a period of use, once the corner of the screen surface and screen slits wears down, it is necessary to rotate it in another direction or replace the screen surface directly, affecting the screening effect and working time. In addition, rotating existing arc screens only changes the direction of the screen surface without replacing the screen surface itself, so its screening effect is also unsatisfactory. Summary of the Invention

[0003] The purpose of this invention is to provide a three-station arc screen with a circular shape, which allows for quick changes in the screen surface and improves the screening efficiency of the arc screen.

[0004] This utility model is achieved through the following technical solution, including a screen cylinder, an arc-shaped screen plate, strip-shaped material inlets, a feeding box, a hopper for collecting oversize material, a rotating shaft, a drive device, and a support. The screen cylinder is connected to the support via the rotating shaft, and the drive device is connected to the rotating shaft. The rotating shaft is located at the center line of the screen cylinder and is connected to the screen cylinder via an end plate. Three strip-shaped material inlets are arranged at 120-degree intervals along the generatrix of the screen cylinder on its outer surface. The inner wall of the screen cylinder is divided into sections at 120-degree intervals. The screen is equipped with three arc-shaped screen plates. One side of each arc-shaped screen plate is flush with one side of the strip-shaped material inlet. The other side of the arc-shaped screen plate is connected to the inner surface of the screen cylinder through a blocking plate. The plane of the blocking plate passes through the center line of the screen cylinder and is parallel to the strip-shaped material inlet. The two ends of the arc-shaped screen plate are connected to the two end plates of the screen cylinder. Below the arc-shaped screen plate, at the connection between the blocking plate and the screen cylinder, three strip-shaped undersize material outlets are provided along the length of the screen cylinder. Three oversize material baffles are provided on the rotating shaft.

[0005] The strip-shaped feed inlet includes a feed port and an oversize discharge port. The feed port is connected to the feed box, and the oversize discharge port is connected to the oversize collection hopper. A feed box is provided above the screen cylinder, and the discharge port of the feed box corresponds to the strip-shaped feed inlet of the screen cylinder and is connected by a flexible guide plate.

[0006] The arc-shaped screen is a stainless steel slotted screen with the slots parallel to the center line of the screen cylinder. Each station of the arc-shaped screen ensures that the arc-shaped screen at the strip material inlet is tangent to the material flow trajectory at the discharge port of the feed box.

[0007] The driving device is a screen station adjustment device, which adjusts the screen cylinder rotation angle by 120 degrees each time.

[0008] The beneficial effects of this utility model are that when the arc-shaped screen at one station is working, the material is output from the feed box, falls onto the arc-shaped screen through the strip-shaped feed inlet for screening, and the undersize material is discharged through the undersize discharge outlet. The oversize material is guided by the oversize baffle plate and enters the oversize collection hopper through the strip-shaped feed inlet and the flexible connection guide plate of the collection hopper. When the arc-shaped screen is worn or the screening accuracy decreases and needs to be replaced, the drive device is started to rotate the screen cylinder 120 degrees, which can instantly transition to the arc-shaped screen at the next station for operation. It has the characteristics of simple structure, compact footprint and flexible operation. It reduces downtime for screen replacement and maintenance, ensures screening accuracy at all times, and is suitable for arc-shaped screening machines for dewatering and desliming. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the present invention; Figure 2 yes Figure 1 Sectional view A-A; In the diagram, 1 is the screen cylinder, 2 is the feed box, 3 is the flexible connecting guide plate, 4 is the strip-shaped feed inlet, 5 is the oversize baffle plate, 6 is the arc-shaped screen plate, 7 is the blocking plate, 8 is the undersize discharge port, 9 is the support, 10 is the rotating shaft, 11 is the oversize receiving hopper, 12 is the drive device, and 13 is the receiving hopper flexible connecting guide plate. Detailed Implementation

[0010] The specific embodiments of this utility model are described below with reference to the accompanying drawings: The system includes a screen cylinder 1, arc-shaped screen plates 6, strip-shaped feed inlets 4, a feed box 2, an oversize material collection hopper 11, a rotating shaft 10, a drive device 12, and a support 9. The screen cylinder 1 is connected to the support 9 via the rotating shaft 10, and the drive device 12 is connected to the rotating shaft 10. The rotating shaft 10 is located at the center line of the screen cylinder 1 and is connected to the screen cylinder 1 via end plates. On the outer surface of the screen cylinder 1, three strip-shaped feed inlets 4 are arranged at 120-degree intervals along the generatrix of the screen cylinder. On the circumference of the inner wall of the screen cylinder 1, three arc-shaped screen plates 6 are arranged at 120-degree intervals. One side of the arc-shaped screen plate 6 is flush with one side of the strip-shaped feed inlet 4, and the other side of the arc-shaped screen plate 6 is connected to the inner surface of the screen cylinder 1 via a blocking plate 7. The plane of the blocking plate 7 passes through the center line of the screen cylinder 1 and is parallel to the strip-shaped feed inlet 4. The two ends of the arc-shaped screen plate 6 are connected to the two end plates of the screen cylinder 1. Below the arc-shaped screen plate 6, at the connection between the blocking plate 7 and the screen cylinder 1, there are 3 strip-shaped undersize discharge ports 8 along the length of the screen cylinder 1; and 3 screen oversize baffle plates 5 are provided on the rotating shaft 10.

[0011] The strip-shaped material inlet 4 includes a feeding port and a screen discharge port. The feeding port is connected to the feeding box 2, and the screen discharge port is connected to the screen collection hopper 11. The feeding box 2 is set above the screen cylinder 1. The discharge port of the feeding box 2 corresponds to the strip-shaped material inlet 4 of the screen cylinder 1 and is connected by a flexible guide plate 3.

[0012] The arc-shaped screen plate 6 is a stainless steel slotted screen plate, and the direction of the slots of the screen plate is parallel to the center line of the screen cylinder 1; each station of the arc-shaped screen ensures that the arc-shaped screen plate 6 at the strip material inlet 4 is tangent to the material flow trajectory of the material outlet of the feed box.

[0013] The drive device 12 is a screen station adjustment device, which adjusts the rotation angle of the screen cylinder 1 by 120 degrees each time.

Claims

1. A circular three-position arc screen, comprising a screen cylinder (1), arc-shaped screen plates (6), strip-shaped feed inlet (4), feed box (2), screen oversize collection hopper (11), rotating shaft (10), drive device (12), and support (9); the screen cylinder (1) is connected to the support (9) via the rotating shaft (10), and the drive device (12) is connected to the rotating shaft (10), characterized in that: The rotating shaft (10) is located at the center line of the screen cylinder (1) and is connected to the screen cylinder (1) through the end plate of the screen cylinder (1); on the outer surface of the screen cylinder (1), there are 3 strip-shaped material inlets (4) arranged at 120 degrees along the generatrix of the screen cylinder; on the circumference of the inner wall of the screen cylinder (1), there are 3 arc-shaped screen plates (6) arranged at 120 degrees, one side of the arc-shaped screen plate (6) is flush with one side of the strip-shaped material inlet (4), and the other side of the arc-shaped screen plate (6) is blocked by a material block. The plate (7) is connected to the inner surface of the screen cylinder (1). The plane of the blocking plate (7) passes through the center line of the screen cylinder (1) and is parallel to the strip material outlet (4). The two ends of the arc screen plate (6) are connected to the two end plates of the screen cylinder (1). Below the arc screen plate (6), at the connection between the blocking plate (7) and the screen cylinder (1), there are 3 strip undersize material outlets (8) along the length of the screen cylinder. There are 3 screen material baffles (5) on the rotating shaft (10).

2. The circumferential circumferential arc screen according to claim 1, characterized in that: The strip-shaped feed inlet (4) includes a feed inlet and a screen discharge outlet. The feed inlet is connected to the feed box (2), and the screen discharge outlet is connected to the screen collection hopper (11). A feed box (2) is provided above the screen cylinder (1). The discharge outlet of the feed box (2) corresponds to the strip-shaped feed inlet (4) of the screen cylinder (1) and is connected by a flexible guide plate (3).

3. The circumferential circumferential arc screen according to claim 1, characterized in that: The arc-shaped screen (6) is a stainless steel slotted screen with the slots parallel to the center line of the screen cylinder (1). Each station of the arc screen ensures that the arc-shaped screen (6) at the strip material inlet (4) is tangent to the material flow trajectory at the feed box outlet.

4. The circumferential circumferential arc screen according to claim 1, characterized in that: The drive device (12) is a screen station adjustment device, and the angle of rotation of the screen cylinder (1) is adjusted by 120 degrees each time.

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