Circumferential three-station sieve bend

Abstract

The invention discloses a circumferential three-station sieve bend, belongs to the field of screening machinery, and prolongs the service life of the sieve bend. Comprising a screen drum, an arc-shaped screen piece, a strip-shaped material opening, a feeding box, an oversize product receiving hopper, a rotating shaft, a driving device and a support. A rotating shaft of the arc-shaped screen is located at the center line of the screen drum and connected with the screen drum through an end plate of the screen drum. Three strip-shaped material ports are formed in the outer surface of the screen drum along the generatrix position of the screen drum at an angle of 120 degrees; three arc-shaped screen pieces are distributed on the circumference of the inner wall of the screen drum at 120 degrees, one edge of each arc-shaped screen piece is flush with one edge of the strip-shaped material opening, the other edge of each arc-shaped screen piece is connected with the inner surface of the screen drum through a material blocking plate, and the two ends of each arc-shaped screen piece are connected with the two end plates of the screen drum. Three strip-shaped screen underflow discharging ports are formed in the position, below the arc-shaped screen piece, of the connecting portion of the material blocking plate and the screen drum in the length direction of the screen drum. The arc-shaped screening machine has the characteristics of simple structure, high screening precision, compact occupied space and flexibility in operation, and is suitable for dehydration and medium drainage.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of screening machinery, and mainly relates to a circular three-station arc screen capable of quickly replacing the screen surface station. BACKGROUND

[0002] The existing arc screen is arranged in the transverse direction of the material flow in order to increase the dewatering and medium removal effect, and one edge of the screen slit is arranged in a slanting manner and is welded to the overall screen surface, so as to achieve the purpose of cutting and screening the material. When the screen surface is used for a period of time, the edge of the screen surface is ground flat, and then another direction is rotated or the screen surface is directly replaced, thereby affecting the screening effect and working time. In addition, after the existing arc screen is rotated, only the direction of the screen surface is changed, and the screen surface is not replaced, so that the screening effect is also very poor. SUMMARY

[0003] The present application aims to provide a circular three-station arc screen capable of quickly replacing the screen surface station and improving the screening efficiency of the arc screen.

[0004] The present application is achieved by the following technical scheme, which comprises a screen cylinder, arc screen pieces, strip-shaped material ports, a feeding box, a screen material collecting hopper, a rotating shaft, a driving device and a support. The screen cylinder is connected with the support through the rotating shaft, and the driving device is connected with the rotating shaft. The rotating shaft is located at the center line of the screen cylinder and is connected with the screen cylinder through the end plate of the screen cylinder. On the outer surface of the screen cylinder, three strip-shaped material ports are arranged at 120 degrees along the generatrix of the screen cylinder. On the circumference of the inner wall of the screen cylinder, three arc screen pieces are arranged at 120 degrees. One edge of the arc screen piece is flush with one edge of the strip-shaped material port, and the other edge of the arc screen piece is connected with 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 port. The two ends of the arc screen piece are connected with the two end plates of the screen cylinder. Three strip-shaped screen material discharge ports are arranged along the length direction of the screen cylinder at the connecting part of the blocking plate and the screen cylinder below the arc screen piece. Three screen material blocking plates are arranged on the rotating shaft.

[0005] The strip-shaped material port comprises a feeding port and a screen material discharge port. The feeding port is connected with the feeding box, and the screen material discharge port is connected with the screen material collecting hopper. A feeding box is arranged above the screen cylinder. The discharge port of the feeding box corresponds to the strip-shaped material port of the screen cylinder and is connected through a soft connection guide plate.

[0006] The arc screen piece is a stainless steel slit screen piece, and the direction of the screen piece slit is parallel to the center line of the screen cylinder. Each station of the arc screen ensures that the arc screen piece at the strip-shaped material port is tangent to the material flow track of the discharge port of the feeding box.

[0007] The driving device is a screen station adjusting device. The angle of the screen cylinder is adjusted by 120 degrees each time.

[0008] The beneficial effect of the present application is that when the arc-shaped screen piece of a station is working, the material is output from the feeding box, falls on the arc-shaped screen piece through the strip-shaped material port for screening, and the undersize material is discharged through the undersize material discharge port. The oversize material is guided by the oversize material baffle plate, enters the oversize material collecting hopper through the strip-shaped material port and the soft connecting guide plate of the collecting hopper, and when the arc-shaped screen piece is worn or the screening precision needs to be replaced, the driving device is started to rotate the screen cylinder by 120 degrees, so that the operation of the arc-shaped screen piece of the next station is instantly transferred. The present application has the characteristics of simple structure, compact occupied space and flexible operation. The replacement of the screen piece and the maintenance time are reduced, the screening precision is ensured at all times, and the present application is suitable for the dehydration and medium removal arc-shaped screening machine. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 is a schematic diagram of the present application; Figure 2 is the A-A sectional view of Figure 1 ; and Fig. 1 is a screen cylinder, 2 is a feeding box, 3 is a soft connecting guide plate, 4 is a strip-shaped material port, 5 is an oversize material baffle plate, 6 is an arc-shaped screen piece, 7 is a blocking plate, 8 is an undersize material discharge port, 9 is a support, 10 is a rotating shaft, 11 is an oversize material collecting hopper, 12 is a driving device, and 13 is a collecting hopper soft connecting guide plate. DETAILED DESCRIPTION

[0010] The specific embodiment of the present application is described below in combination with the drawings: The present application comprises a screen cylinder 1, an arc-shaped screen piece 6, a strip-shaped material port 4, a feeding box 2, an oversize material collecting hopper 11, a rotating shaft 10, a driving device 12 and a support 9. The screen cylinder 1 is connected with the support 9 through the rotating shaft 10, and the driving device 12 is connected with the rotating shaft 10. The rotating shaft 10 is located at the center line of the screen cylinder 1 and is connected with the screen cylinder 1 through the end plate of the screen cylinder 1. On the outer surface of the screen cylinder 1, three strip-shaped material ports 4 are arranged at 120 degrees along the screen cylinder generatrix position. On the circumference of the inner wall of the screen cylinder 1, three arc-shaped screen pieces 6 are arranged at 120 degrees. One edge of the arc-shaped screen piece 6 is flush with one edge of the strip-shaped material port 4, and the other edge of the arc-shaped screen piece 6 is connected with the inner surface of the screen cylinder 1 through the blocking plate 7. The plane where the blocking plate 7 is located passes through the center line of the screen cylinder 1 and is parallel to the strip-shaped material port 4. The two ends of the arc-shaped screen piece 6 are connected with the two end plates of the screen cylinder 1. Below the arc-shaped screen piece 6, three strip-shaped undersize material discharge ports 8 are arranged along the length direction of the screen cylinder 1 at the connection part of the blocking plate 7 and the screen cylinder 1. Three oversize material baffle plates 5 are arranged on the rotating shaft 10.

[0011] The strip-shaped material port 4 comprises a feeding port and an oversize material discharge port. The connection part with the feeding box 2 is the feeding port, and the connection part with the oversize material collecting hopper 11 is the oversize material discharge port. A feeding box 2 is arranged above the screen cylinder 1. The discharge port of the feeding box 2 corresponds to the strip-shaped material port 4 of the screen cylinder 1 and is connected through the soft connecting guide plate 3.

[0012] The arc screen 6 is a stainless steel slit screen, and the direction of the screen strips is parallel to the center line of the screen drum 1; each station of the arc screen ensures that the arc screen 6 at the strip material port 4 is tangent to the material flow trajectory of the feed box discharge port.

[0013] The driving device 12 is a screen position adjustment device, and each adjustment angle of the screen drum 1 is 120 degrees.

Claims

1. A circular three-station curved screen, comprising a screen drum (1), a curved screen plate (6), a strip material port (4), a feed box (2), an overscreen material receiving hopper (11), a rotating shaft (10), a driving device (12) and a bracket (9); the screen drum (1) is connected to the bracket (9) via the rotating shaft (10), and the driving device (12) is connected to the rotating shaft (10), and is characterized by: The rotating shaft (10) is located at the center line of the screen drum (1) and is connected to the screen drum (1) through the end plate of the screen drum (1); three strip material openings (4) are provided on the outer surface of the screen drum (1) at 120 degrees along the position of the screen drum generatrix; three arc-shaped screen pieces (6) are provided on the circumference of the inner wall of the screen drum (1) at 120 degrees, one side of the arc-shaped screen piece (6) is flush with one side of the strip material opening (4), and the other side of the arc-shaped screen piece (6) is blocked by the material. The plate (7) is connected to the inner surface of the screen drum (1), the plane where the blocking plate (7) is located passes through the center line of the screen drum (1) and is parallel to the strip material opening (4), and the two ends of the arc-shaped screen plate (6) are connected to the two end plates of the screen drum (1); below the arc-shaped screen plate (6), at the connection portion between the blocking plate (7) and the screen drum (1), three strip-shaped undersize material discharge openings (8) are provided along the length direction of the screen drum; and three oversize material blocking plates (5) are provided on the rotating shaft (10).

2. The circumferential three-station curved screen according to claim 1 is characterized by: The strip-shaped material opening (4) includes a feeding opening and an overscreen material discharge opening, wherein the connection with the feeding box (2) is the feeding opening, and the connection with the overscreen material receiving hopper (11) is the overscreen material discharge opening; a feeding box (2) is provided above the screen drum (1), and the discharge opening of the feeding box (2) corresponds to the strip-shaped material opening (4) of the screen drum (1), and is connected via a flexible connecting guide plate (3).

3. The circumferential three-station curved screen according to claim 1 is characterized by: The curved screen (6) is a stainless steel slit screen, and the direction of the screen strip is parallel to the center line of the screen drum (1); each station of the curved screen ensures that the curved screen (6) at the strip material port (4) is tangent to the material flow trajectory of the feed box discharge port.

4. The circumferential three-station curved screen according to claim 1 is characterized by: The driving device (12) is a screen position adjustment device, and the rotation angle of the screen drum (1) is adjusted by 120 degrees each time.

Images