Large drum screen

Abstract

The utility model discloses a large drum screen, which belongs to the technical field of mineral screening equipment and comprises a frame. A screening drum is rotatably arranged on the frame and is connected with a driving component; a screening net is arranged on the circumferential surface of the screening barrel; baffle rings are arranged at two ends of the screening cylinder; a plurality of baffle plates are arranged on the inner wall surface of the screening cylinder; the material distribution box is arranged in the screening barrel and is provided with a feeding cavity and a coarse material cavity which are isolated from each other; a discharge hole communicated with the feeding cavity is formed in the bottom of the distribution box; a coarse material inlet communicated with the coarse material cavity is formed in the top of the material distribution box; the feeding cavity is communicated with a feeding pipe; the coarse material cavity is communicated with a discharging pipe; the feeding pipe and the discharging pipe are both fixed on the rack; ore pulp enters the feeding cavity through the feeding pipe and falls into the screening barrel from the discharging port, the screening barrel rotates to screen out fine materials through the screening net, the material blocking plate drives coarse materials to rotate along with the screening barrel, and when the material blocking plate moves to the position above the material distribution box, the coarse materials fall into the coarse material cavity from the coarse material inlet under the action of gravity and are discharged from the discharging pipe. And ore pulp screening is achieved.

Description

Technical Field

[0001] This utility model relates to the field of mineral screening equipment technology, specifically to a large cylindrical screen. Background Technology

[0002] Cylindrical screens are the main mining equipment for screening metallic ores (such as iron ore, manganese ore, ilmenite, etc.) and non-metallic ores (such as quartz, feldspar, etc.). Existing cylindrical screens are usually composed of a screening cylinder, feed pipe, discharge pipe, coarse material box, fine material box, receiving hopper, drive system, frame, and ore flushing device.

[0003] During the operation of large cylindrical screens, especially when the diameter of the screening cylinder is greater than 2.5m and the length is greater than 3m, the slurry processing volume is large and the slurry flow rate is high. This will cause the material to be concentrated at the feed pipe, making it difficult to achieve uniform material distribution along the entire length of the screening cylinder. This will affect the screening efficiency and reduce the output. At the same time, due to the problem of concentrated material discharge, the screening cylinder will also be overloaded in some areas, resulting in uneven wear of the screen and affecting the service life of the screen.

[0004] Therefore, developing and designing a large cylindrical screen with uniform material distribution, higher screening efficiency and output, and longer screen life is an urgent problem to be solved at this stage. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides a large cylindrical screen. The slurry enters the feed chamber through the feed pipe and falls into the screening cylinder from the discharge port. The drive component drives the screening cylinder to rotate. While the fine material is screened out through the screening screen, the baffle plate drives the coarse material to rotate with the screening cylinder. When the baffle plate moves above the distribution box, the coarse material falls from the coarse material inlet into the coarse material chamber under the action of gravity and is discharged from the discharge pipe, thus realizing the screening of the slurry. The screening effect is good, the screening efficiency and output are high, and the service life of the screen is longer.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] This utility model provides a large cylindrical sieve, comprising:

[0008] frame:

[0009] A screening cylinder is rotatably mounted on the frame, with its axis horizontally positioned. The screening cylinder is connected to a drive assembly that drives its rotation. The circumferential surface of the screening cylinder is provided with a screening screen. Both ends of the screening cylinder are provided with retaining rings, and the inner wall surface of the screening cylinder is provided with a plurality of baffle plates, which are distributed along the circumference of the screening cylinder.

[0010] The material distribution box is located inside the screening cylinder and has a feed chamber and a coarse material chamber that are isolated from each other. The bottom of the material distribution box has a discharge port that communicates with the feed chamber. The top of the material distribution box has a coarse material inlet that communicates with the coarse material chamber. The feed chamber is connected to a feed pipe that extends from one end of the screening cylinder. The coarse material chamber is connected to a discharge pipe that extends from the other end of the screening cylinder. Both the feed pipe and the discharge pipe are fixed to the frame to position the material distribution box inside the screening cylinder.

[0011] As a preferred technical solution, the coarse material inlet is equipped with a material collection hopper.

[0012] As a preferred technical solution, the baffle plate includes a first section and a second section, which are distributed along a direction away from the inner wall of the screening cylinder; the first section is fixedly connected to the inner wall of the screening cylinder; when the height of the second section is flush with the upper end of the hopper and has an upward tendency, the second section is inclined upward along a direction away from the first section; when the height of the second section is at its highest point, the second section is inclined downward along a direction away from the first section.

[0013] As a preferred technical solution, the two ends of the baffle plate are respectively connected to the retaining rings at both ends of the screening cylinder;

[0014] And / or, the extending direction of the baffle plate is parallel to the axis of the screening cylinder;

[0015] And / or, the first segment is arranged radially along the screening cylinder, and the included angle between the first segment and the second segment is set to an obtuse angle.

[0016] As a preferred technical solution, both ends of the screening cylinder are provided with flanges, which form the retaining rings; a hollow shaft is provided on the end face of the flange away from the screening cylinder, and rollers and external gears are provided on the outer circumference of the hollow shaft; a plurality of support rollers are provided on the frame at the positions corresponding to the rollers, and the plurality of support rollers support the rollers; the driving component is a motor, and a drive gear is provided on the output shaft of the motor, and the drive gear meshes with the external gear.

[0017] As a preferred technical solution, the feed pipe and the discharge pipe pass sequentially through the flanges and the hollow shaft at both ends of the screening cylinder;

[0018] And / or, the motor is fixed to the frame.

[0019] As a preferred technical solution, a fine material box is provided on the frame directly below the discharge port. The upper end of the fine material box is provided with a fine material inlet that matches the screening cylinder, and the lower part of the fine material box is provided with a fine material outlet.

[0020] As a preferred technical solution, the material distribution box is provided with a first partition, which separates the feeding chamber from the coarse material chamber. The first partition is inclined downward along the direction from the feeding pipe to the discharging pipe.

[0021] And / or, the feeding chamber is provided with a plurality of second partitions, which divide the feeding chamber into a plurality of mutually isolated distributing chambers, the distributing chambers being respectively connected to the feeding pipe and the distributing port;

[0022] And / or, a material hopper is provided inside the screening cylinder at a position below the discharge port, and the bottom surface of the material hopper is provided with evenly distributed material distribution holes, and the material hopper is fixedly connected to the material distribution box;

[0023] And / or, the diameter of the screening cylinder is greater than 2.5m, and the length of the screening cylinder is greater than 3m.

[0024] As a preferred technical solution, a load-bearing net is fixedly connected to the outer circumference of the screening mesh; the load-bearing net includes multiple arc-shaped pieces, which are connected in sequence to wrap the screening mesh.

[0025] As a preferred technical solution, it also includes a flushing pipe, which is fixed on the frame and located above the screening cylinder. The flushing pipe has a plurality of water outlet holes, which extend along the axial direction of the screening cylinder.

[0026] The beneficial effects of this utility model are as follows:

[0027] 1. The slurry enters the feed chamber through the feed pipe of this utility model and falls into the screening cylinder from the discharge port. The drive component drives the screening cylinder to rotate. While the fine material is screened out through the screening screen, the baffle plate drives the coarse material to rotate with the screening cylinder. When the baffle plate moves to the top of the distribution box, the coarse material slides down the baffle plate under the action of gravity and falls into the coarse material chamber from the coarse material inlet and is discharged from the discharge pipe, realizing the coarse and fine screening of the slurry. The screening effect is good, the screening efficiency and output are high, and the service life of the screen is longer.

[0028] 2. This utility model separates the feeding chamber from the coarse material chamber through the first partition, and at the same time guides the coarse material falling into the coarse material chamber to flow towards the discharge pipe, ensuring that the coarse material is smoothly discharged from the discharge pipe without any residue.

[0029] 3. This utility model can divide the feeding chamber into multiple distribution chambers by using several second partitions, so that the slurry can flow along different distribution chambers and fall into different positions in the screening cylinder, realizing the distribution of slurry along the entire length of the screening cylinder and effectively improving the uniformity of the distribution.

[0030] 4. This utility model uses multiple arc-shaped pieces connected in sequence to form a skeleton that wraps around the screening mesh, which can effectively improve the overall rigidity of the screening cylinder and enhance its load-bearing capacity. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of one embodiment of a large cylindrical screen according to the present invention;

[0032] Figure 2 for Figure 1 Enlarged view of region A in the middle;

[0033] Figure 3 for Figure 1 Side view;

[0034] Figure 4 for Figure 1 A schematic diagram of the material distribution box in the middle;

[0035] Figure 5 for Figure 4 Sectional view along the BB direction;

[0036] Figure 6 for Figure 4 Top view;

[0037] Figure 7 for Figure 6 A cross-sectional view along the CC direction;

[0038] Figure 8 for Figure 6 A sectional view along the DD direction.

[0039] In the diagram: 1-Frame, 11-Roller, 12-Fine material box, 13-Fine material outlet, 2-Screening cylinder, 21-Screening screen, 22-Flange, 23-Hollow shaft, 24-Roller, 25-External gear, 3-Drive assembly, 31-Drive gear, 4-Baffle plate, 41-First section, 42-Second section, 5-Distribution box, 51-Feeding chamber, 511-Distribution chamber, 52-Coarse material chamber, 53-Outlet, 54-Coarse material inlet, 55-Feeding pipe, 56-Outlet pipe, 57-Collection hopper, 58-First partition, 59-Second partition, 6-Distribution hopper, 61-Distribution hole, 7-Bearing net, 8-Flushing pipe. Detailed Implementation

[0040] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0041] Please refer to Figures 1-8 This invention provides an embodiment of a large cylindrical screen, comprising a frame 1; a screening cylinder 2 rotatably mounted on the frame 1, with its axis horizontally positioned, and a drive assembly 3 connected to drive it to rotate around its axis; a screening screen 21 is provided on the circumferential surface of the screening cylinder 2, after the slurry falls into the screening cylinder 2, fine material falls out of the screening cylinder 2 under the filtration of the screening screen 21, while coarse material remains inside the screening cylinder 2; baffle rings are provided at both ends of the screening cylinder 2 to prevent the slurry from flowing out of the screening cylinder 2; a plurality of baffle plates 4 are provided on the inner wall surface of the screening cylinder 2, the baffle plates 4 being distributed along the circumference of the screening cylinder 2, and the baffle plates 4 being able to drive the coarse material between two adjacent baffle plates 4 to rotate with the screening cylinder 2;

[0042] The distribution box 5 is located inside the screening cylinder 2. The distribution box 5 has a feed chamber 51 and a coarse material chamber 52 that are isolated from each other. The bottom of the distribution box 5 has a discharge port 53, which is connected to the feed chamber 51. The feed chamber 51 is connected to a feed pipe 55, which extends from one end of the screening cylinder 2. The slurry flows into the feed chamber 51 through the feed pipe 55 and falls into the screening cylinder 2 through the discharge port 53. The top of the distribution box 5 has a coarse material inlet 54. The coarse material inlet 54 is connected to the coarse material chamber 52, and the coarse material chamber 52 is connected to the discharge pipe 56. The discharge pipe 56 extends from the other end of the screening cylinder 2. When the baffle plate 4 moves above the distribution box 5, the coarse material slides down along the baffle plate 4 under the action of gravity and falls into the coarse material chamber 52 from the coarse material inlet 54 and is discharged from the discharge pipe 56. This achieves coarse and fine screening of the slurry, with good screening effect, high screening efficiency and output, and longer service life of the screen.

[0043] Both the feed pipe 55 and the discharge pipe 56 are fixedly connected to the frame 1, thereby stably supporting and positioning the distribution box 5 inside the screening cylinder 2.

[0044] In this embodiment, please refer to Figure 1 and Figure 3 The present invention also includes a flushing pipe 8, which is fixed on the frame 1 and located above the screening cylinder 2. The flushing pipe 8 has several water outlets that extend along the axial direction of the screening cylinder 2. The flushing water is sprayed out from the water outlets and falls onto the screening cylinder 2, which can wash the screening screen 21 and improve the screening effect of the slurry. Specifically, the flushing pipe 8 is preferably set to 1-6 pipes, and the several flushing pipes 8 are distributed along the circumference of the screening cylinder 2, which can further improve the screening effect of the slurry. In other embodiments, the water outlets on the flushing pipe 8 can also be set as segmented long grooves, so that the flushing water can be evenly sprayed onto the screening cylinder 2.

[0045] For details, please refer to Figure 1A collection hopper 57 should be provided on the coarse material inlet 54, which can better collect the coarse material falling from the baffle plate 4.

[0046] It should be noted that in actual production, the cross-sectional shape of the material distribution box 5 can be rectangular, trapezoidal, or circular.

[0047] In this embodiment, please refer to Figure 3 The baffle plate 4 includes a first section 41 and a second section 42, which are distributed along the direction away from the inner wall of the screening cylinder 2. The first section 41 is fixedly connected to the inner wall of the screening cylinder 2. When the height of the second section 42 is flush with the upper end of the collecting hopper 57 and has an upward tendency, the second section 42 is inclined upward along the direction away from the first section 41. When the height of the second section 42 is at the highest point, the second section 42 is inclined downward along the direction away from the first section 41. That is, during the process of the baffle plate 4 moving from the position flush with the upper end of the collecting hopper 57 to the highest point, the second section 42 gradually changes from inclined upward to inclined downward, ensuring that the coarse material on the baffle plate 4 smoothly slides into the coarse material cavity 52 under the action of gravity during this process.

[0048] For details, please refer to Figure 1 and Figure 3 The two ends of the baffle plate 4 are connected to the retaining rings at both ends of the screening cylinder 2, which improves the fixing effect of the baffle plate 4 and enables each baffle plate 4 to drive all the coarse material between two adjacent baffle plates 4 in the screening cylinder 2 and move it upward.

[0049] It should be noted that the extension direction of the baffle plate 4 is preferably parallel to the axis of the screening cylinder 2, so as to prevent the coarse material on the baffle plate 4 from moving horizontally during the rotation of the screening cylinder 2, and to ensure that the coarse material on the baffle plate 4 can fall into the coarse material cavity 52 through the collecting hopper 57.

[0050] Further, please refer to Figure 3 The first section 41 is preferably arranged radially along the screening cylinder 2. The included angle between the first section 41 and the second section 42 is set to an obtuse angle. The first section 41 and the second section 42 form a concave baffle plate 4 to ensure that the baffle plate 4 can drive all the coarse material between the two adjacent baffle plates 4 and move it upward.

[0051] In this embodiment, please refer to Figure 1Both ends of the screening cylinder 2 are provided with flanges 22, which form retaining rings. A hollow shaft 23 is provided on the end face of the flange 22 away from the screening cylinder 2, and the through hole of the hollow shaft 23 is connected to the inner hole of the flange 22. Rollers 24 and external gears 25 are provided on the outer circumference of the hollow shaft 23. Several support rollers 11 are provided on the frame 1 at the positions corresponding to the rollers 24. The support rollers 11 support the rollers 24 while allowing the screening cylinder 2 to rotate relative to the frame 1. The drive assembly 3 is a motor. A drive gear 31 is provided on the output shaft of the motor. The drive gear 31 meshes with the external gear 25. When the drive gear 31 on the output shaft of the motor rotates, the screening cylinder 2 can be driven to rotate through the drive gear 31 and the hollow shaft 23.

[0052] Based on the foregoing embodiments, please refer to Figure 1 The feed pipe 55 and the discharge pipe 56 pass through the flanges 22 and the hollow shaft 23 at both ends of the screening cylinder 2, respectively, to facilitate feeding and discharging of coarse materials.

[0053] For details, please refer to Figure 1 and Figure 3 The motor is fixed on frame 1.

[0054] In this embodiment, please refer to Figure 1 and Figure 3 A fine material box 12 is provided on the frame 1 directly below the discharge port 53. The fine material box 12 is located outside the screening cylinder 2. The upper end of the fine material box 12 is provided with a fine material inlet that matches the screening cylinder 2, and the lower part of the fine material box 12 is provided with a fine material outlet 13. The fine material screened out by the screening cylinder 2 falls into the fine material box 12 from the fine material inlet and can be discharged from the fine material outlet 13. Specifically, the upper opening of the fine material box 12 forms the fine material inlet, and the lower half of the screening cylinder 2 is embedded into the fine material box 12 from the fine material inlet to ensure that all the fine material screened out by the screening cylinder 2 falls into the fine material box 12.

[0055] In this embodiment, please refer to Figure 7 and Figure 8 The material distribution box 5 is provided with a first partition 58, which separates the feeding chamber 51 from the coarse material chamber 52. The first partition 58 is inclined downward along the direction from the feeding pipe 55 to the discharge pipe 56, which can guide the coarse material falling into the coarse material chamber 52 to flow towards the discharge pipe 56, ensuring that the coarse material is smoothly discharged from the discharge pipe 56 without any residue.

[0056] Further, please refer to Figures 6-8The feeding chamber 51 is provided with several second partitions 59, which divide the feeding chamber 51 into multiple isolated distribution chambers 511. The distribution chambers 511 are respectively connected to the feeding pipe 55 and the discharge port 53. The multiple distribution chambers 511 are preferably distributed along the axial direction of the screening cylinder 2 at the discharge port 53, so that the slurry can fall into different positions in the screening cylinder 2 along different distribution chambers 511, realizing the distribution of slurry along the entire length of the screening cylinder 2, effectively improving the uniformity of distribution, reducing the impact force of slurry on the screening screen 21, and playing a buffering role. Specifically, the several second partitions 59 can divide the feeding chamber 51 into 2-6 distribution chambers 511. In other embodiments, the several second partitions 59 can also divide the multiple distribution chambers 511 into other distribution methods, based on the requirement of uniform distribution of slurry.

[0057] Furthermore, please refer to Figure 1 , Figure 2 and Figure 4 Inside the screening cylinder 2, a feeding hopper 6 is located below the discharge port 53. The bottom surface of the feeding hopper 6 has evenly distributed feeding holes 61. The feeding hopper 6 is fixedly connected to the distribution box 5. The slurry discharged from the discharge port 53 first falls into the feeding hopper 6. The slurry can be evenly spread onto the screening screen 21 of the screening cylinder 2 through the feeding holes 61, realizing secondary feeding. The screening output can be increased by more than 20%, while also improving the service life of the screening screen 21, extending the maintenance cycle, and reducing maintenance costs.

[0058] It should be noted that the diameter of screening cylinder 2 should be greater than 2.5m and the length of screening cylinder 2 should be greater than 3m to ensure the processing capacity of slurry.

[0059] In this embodiment, please refer to Figure 2 The outer circumference of the screening mesh 21 is provided with a load-bearing mesh 7 fixedly connected thereto. The load-bearing mesh 7 includes multiple arc-shaped pieces, which are connected in sequence to wrap around the screening mesh 21, forming a skeleton that supports the screening mesh 21. This can effectively improve the overall rigidity of the screening cylinder 2, strengthen the load-bearing capacity of the screening cylinder 2, and avoid the problem of bulging and affecting the service life of the screening mesh 21 due to uneven material distribution. Specifically, the number of arc-shaped pieces is set to 2-8 pieces, and the multiple arc-shaped pieces are connected by bolts or fasteners to form a cylindrical shape that matches the screening cylinder 2.

[0060] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A large cylindrical sieve, characterized in that, include: Rack (1): A screening cylinder (2) is rotatably mounted on the frame (1). The axis of the screening cylinder (2) is horizontally positioned. The screening cylinder (2) is connected to a drive assembly (3) that drives its rotation. The circumferential surface of the screening cylinder (2) is set as a screening screen (21). Both ends of the screening cylinder (2) are provided with retaining rings. The inner wall surface of the screening cylinder (2) is provided with several baffle plates (4). The several baffle plates (4) are distributed along the circumference of the screening cylinder (2). The material distribution box (5) is located inside the screening cylinder (2). The material distribution box (5) has a feed chamber (51) and a coarse material chamber (52) that are isolated from each other. The bottom of the material distribution box (5) has a discharge port (53) that is connected to the feed chamber (51). The top of the material distribution box (5) has a coarse material inlet (54) that is connected to the coarse material chamber (52). The feed chamber (51) is connected to a feed pipe (55), which extends from one end of the screening cylinder (2); the coarse material chamber (52) is connected to a discharge pipe (56), which extends from the other end of the screening cylinder (2); both the feed pipe (55) and the discharge pipe (56) are fixed on the frame (1) to position the material distribution box (5) inside the screening cylinder (2).

2. A large cylindrical screen according to claim 1, characterized in that, The coarse material inlet (54) is equipped with a material collection hopper (57).

3. A large cylindrical screen according to claim 2, characterized in that, The baffle plate (4) includes a first section (41) and a second section (42), the first section (41) and the second section (42) are distributed along a direction away from the inner wall of the screening cylinder (2); the first section (41) is fixedly connected to the inner wall of the screening cylinder (2); when the height of the second section (42) is flush with the upper end of the collecting hopper (57) and has an upward tendency, the second section (42) is inclined upward along a direction away from the first section (41); when the height of the second section (42) is at the highest point, the second section (42) is inclined downward along a direction away from the first section (41).

4. A large cylindrical screen according to claim 3, characterized in that, The two ends of the baffle plate (4) are respectively connected to the retaining rings at both ends of the screening cylinder (2); And / or, the extending direction of the baffle plate (4) is parallel to the axis of the screening cylinder (2); And / or, the first segment (41) is arranged radially along the screening cylinder (2), and the included angle between the first segment (41) and the second segment (42) is set to an obtuse angle.

5. A large cylindrical screen according to claim 1, characterized in that, Both ends of the screening cylinder (2) are provided with flanges (22), which form the retaining rings; a hollow shaft (23) is provided on the end face of the flange (22) away from the screening cylinder (2), and a roller (24) and an external gear (25) are provided on the outer circumferential surface of the hollow shaft (23). Several support rollers (11) are provided on the frame (1) at the position corresponding to the roller (24), and the several support rollers (11) support the roller (24). The drive assembly (3) is a motor, and a drive gear (31) is provided on the output shaft of the motor. The drive gear (31) meshes with the external gear (25).

6. A large cylindrical screen according to claim 5, characterized in that, The feed pipe (55) and the discharge pipe (56) pass through the flange (22) and the hollow shaft (23) at both ends of the screening cylinder (2), respectively. And / or, the motor is fixed to the frame (1).

7. A large cylindrical screen according to claim 1, characterized in that, A fine material box (12) is provided on the frame (1) directly below the discharge port (53). The upper end of the fine material box (12) is provided with a fine material inlet that matches the screening cylinder (2), and the lower part of the fine material box (12) is provided with a fine material outlet (13).

8. A large cylindrical screen according to claim 7, characterized in that, The material distribution box (5) is provided with a first partition (58), which separates the feeding chamber (51) from the coarse material chamber (52). The first partition (58) is inclined downward along the direction from the feeding pipe (55) to the discharge pipe (56). And / or, the feeding chamber (51) is provided with a plurality of second partitions (59), the plurality of second partitions (59) divide the feeding chamber (51) into a plurality of mutually isolated distributing chambers (511), the distributing chambers (511) being connected to the feeding pipe (55) and the discharge port (53) respectively; And / or, a feeding hopper (6) is provided inside the screening cylinder (2) at a position below the discharge port (53), and the bottom surface of the feeding hopper (6) is provided with evenly distributed feeding holes (61), and the feeding hopper (6) is fixedly connected to the distribution box (5); And / or, the diameter of the screening cylinder (2) is greater than 2.5m, and the length of the screening cylinder (2) is greater than 3m.

9. A large cylindrical screen according to claim 1, characterized in that, The outer circumferential surface of the screening mesh (21) is provided with a load-bearing mesh (7) fixedly connected thereto; the load-bearing mesh (7) includes multiple arc-shaped pieces, which are connected in sequence to wrap the screening mesh (21).

10. A large cylindrical screen according to claim 1, characterized in that, It also includes a flushing pipe (8), which is fixed on the frame (1) and located above the screening cylinder (2). The flushing pipe (8) has a plurality of water outlet holes, which extend along the axial direction of the screening cylinder (2).

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