CN108296159B

CN108296159B - Anti-blocking drum screen

Info

Publication number: CN108296159B
Application number: CN201810059250.0A
Authority: CN
Inventors: 孙欢庆; 汪建新; 曹丽英
Original assignee: Inner Mongolia University of Science and Technology
Current assignee: INNER MONGOLIA HONG SHENG MEI YA ENVIRONMENTAL SCIENCE AND TECHNOLOGY Co.,Ltd.; Inner Mongolia University of Science and Technology
Priority date: 2018-01-22
Filing date: 2018-01-22
Publication date: 2020-05-19
Anticipated expiration: 2038-01-22
Also published as: CN108296159A

Abstract

The invention provides an anti-blocking drum screen, which comprises: the main shaft, the crossbeam, the fossil fragments steelframe, the cylinder spoke, upper screen cloth piece and outer main screen cloth. Aiming at the problem of screen blockage of a rotary screen in ore pulp screening, the invention utilizes the probability screening principle to arrange a plurality of upper-layer screen pieces parallel to the axis of a rotary drum at equal intervals along the circumferential direction in the rotary screen. The aperture of upper screen piece is greater than a plurality of times of outer main screen cloth control granularity, and the primary function prevents that a large amount of materials from piling up simultaneously on the sifter of outer main screen cloth, has solved the sieve mesh jam problem that the screening ore pulp appears.

Description

Anti-blocking drum screen

Technical Field

The invention relates to the technical field of particle size classification of dispersed materials, in particular to an anti-blocking drum screen.

Background

The drum screen is a screening device with strong screening capacity, and is widely applied to the fields of mining, metallurgy, chemical industry, building and the like. However, in the rotating process of the drum screen, due to the centrifugal force and the mutual extrusion force between the materials, especially when wet materials are treated, even if the material layer is thin, the hole blocking phenomenon of the drum screen often occurs in a short time, the screening effect is seriously affected, and the common problem of the drum screen is solved.

Disclosure of Invention

The invention aims to provide a drum screen capable of efficiently grading small-granularity dispersed materials, which has the characteristics of high treatment efficiency, high unit productivity, no blockage and the like.

The invention provides an anti-blocking drum screen, which comprises: the device comprises a main shaft, a cross beam, a keel steel frame, roller spokes, an upper-layer screen sheet and an outer-layer main screen;

the outer-layer main screen is cylindrical, the main shaft penetrates through the outer-layer main screen from the center of the outer-layer main screen, and the drum spokes are connected between the main shaft and the outer-layer main screen and are uniformly distributed in the axial direction and the circumferential direction of the main shaft;

the cross beams are arranged in parallel to the main shaft, the length of each cross beam is equal to that of the outer-layer main screen, the number of the cross beams is equal to that of the drum spokes on the circumferential plane of the same main shaft, the cross beams are vertically connected with the drum spokes correspondingly, and the vertical connection points of the cross beams and the drum spokes are positioned on one side, close to the outer-layer main screen, of the drum spokes;

on the circumferential plane of the same main shaft, the number of the keel steel frames is equal to that of the roller spokes, and the keel steel frames are connected between the vertical connecting points and the end points of the roller spokes on the adjacent side of the vertical connecting points;

the upper-layer sieve sheet is arranged in a square area defined by connecting end points of two axially adjacent roller spokes, a beam between two axially adjacent roller spokes and two axially adjacent keel steel frames.

Aiming at the problem of screen blockage of a rotary screen in ore pulp screening, the invention utilizes the probability screening principle to arrange a plurality of upper-layer screen pieces parallel to the axis of a rotary drum at equal intervals along the circumferential direction in the rotary screen. The aperture of upper screen piece is greater than a plurality of times of outer main screen cloth control granularity, and the primary function prevents that a large amount of materials from piling up simultaneously on the sifter of outer main screen cloth, has solved the sieve mesh jam problem that the screening ore pulp appears.

Furthermore, a flexible isolation layer is arranged between the inner side of the outer layer main screen and the upper layer screen.

Further, the material of the flexible isolation layer is nylon and/or resin.

Further, the included angle between two circumferentially adjacent cylinder spokes is 45 °.

Furthermore, on the circumferential plane of the same main shaft, the keel steel frames are connected between the vertical connecting points and the end points of the drum spokes on the anticlockwise side of the vertical connecting points.

Further, the aperture of the upper layer screen sheet is 3-100 times of the aperture of the outer layer main screen.

Furthermore, the anti-blocking rotary screen further comprises a rack, a motor, a coupler, a speed reducer and a bearing seat, wherein the motor, the speed reducer and the bearing seat are all arranged on the rack; in the power transmission direction, the motor, the speed reducer and the main shaft are sequentially connected, the motor and the speed reducer and the main shaft are connected through the coupler, and the main shaft is connected to the bearing seat.

Further, the shape of the upper layer screen sheet is planar or curved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a schematic structural view of an anti-blocking trommel according to an embodiment of the present invention;

3 fig. 3 2 3 is 3 a 3 structural 3 schematic 3 view 3 of 3 a 3 circumferential 3 plane 3 of 3 the 3 main 3 shaft 3 of 3 the 3 embodiment 3 of 3 the 3 present 3

invention

3, 3 i.e. 3, 3 a 3 sectional 3 view 3 a 3- 3 a 3 in 3 fig. 3 1 3. 3

In the drawings are labeled:

1 machine frame

2 electric machine

3 coupler

4 speed reducer

5 bearing seat

6 Main shaft

7 Cross member

8 keel steel frame

9 Flexible Barrier layer

10 roller spoke

11 upper layer sieve sheet

12 outer layer main screen mesh

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

The embodiment of the invention provides an anti-blocking drum screen, which comprises a main shaft 6, a cross beam 7, a keel steel frame 8, drum spokes 10, an upper-layer screen sheet 11 and an outer-layer main screen 12, wherein the main shaft is connected with the cross beam 7 through a connecting rod; the outer layer main screen 12 is cylindrical, the main shaft 6 penetrates through the outer layer main screen 12 from the center of the outer layer main screen 12, and the drum spokes 10 are connected between the main shaft 6 and the outer layer main screen 12 and are uniformly distributed in the axial direction and the circumferential direction of the main shaft 6; the cross beams 7 are arranged parallel to the main shaft 6, the length of each cross beam 7 is equal to that of the outer-layer main screen 12, the number of the cross beams 7 is equal to that of the drum spokes 10 on the circumferential plane of the same main shaft, the cross beams 7 are vertically connected with the drum spokes 10 correspondingly, and the vertical connection points of the cross beams 7 and the drum spokes 10 are positioned on one side, close to the outer-layer main screen 12, of the drum spokes 10; on the circumferential plane of the same main shaft, the number of the keel steel frames 8 is equal to that of the roller spokes 10, the keel steel frames 8 are connected between the vertical connection point and the end points of the roller spokes 10 on the adjacent side, and optionally, the keel steel frames 8 are connected between the vertical connection point and the end points of the roller spokes 10 on the counterclockwise side; the upper-layer sieve sheet 11 is arranged in a square area formed by connecting end points of two axially adjacent keel steel frames 8, a cross beam 7 between two axially adjacent roller spokes 10 and two axially adjacent roller spokes 10. Preferably, the aperture of the upper-layer screen 11 is 3-100 times of the aperture of the outer-layer main screen 12, and the upper-layer screen 11 is planar or curved. Aiming at the problem of screen blockage of a rotary screen in ore pulp screening, the invention utilizes the probability screening principle to arrange a plurality of upper-layer screen pieces parallel to the axis of a rotary drum at equal intervals along the circumferential direction in the rotary screen. The aperture of upper screen piece is greater than a plurality of times of outer main screen cloth control granularity, and the primary function prevents that a large amount of materials from piling up simultaneously on the sifter of outer main screen cloth, has solved the sieve mesh jam problem that the screening ore pulp appears.

In one aspect of the present embodiment, a flexible isolation layer 9 is further disposed between the inner side of the outer main screen 12 and the upper screen 11. Preferably, the material of the flexible isolation layer 9 is nylon and/or resin. The setting of flexible isolation layer can avoid outer layer main screen cloth wearing and tearing too fast.

In one aspect of the present embodiment, the angle between two circumferentially adjacent cylinder spokes 10 is 45 °. That is, on the circumferential plane of the same main shaft, 8 drum spokes 10 are provided, and 8

keel steel frames

8 and 8 cross beams 7 are provided to form an internal supporting structure.

In one aspect of the embodiment of the present invention, as shown in fig. 1, the anti-blocking drum screen further includes a frame 1, a motor 2, a coupling 3, a speed reducer 4 and a bearing seat 5, wherein the motor 2, the speed reducer 4 and the bearing seat 5 are all disposed on the frame 1; in the power transmission direction, the motor 2, the speed reducer 4 and the main shaft 6 are sequentially connected, the motor 2 and the speed reducer 4 and the main shaft 6 are connected through the coupler 3, and the main shaft 6 is connected to the bearing seat 5.

In one specific embodiment of the invention, when the invention is used, the axis is obliquely arranged, the driving side where the motor is arranged is at a high position, and the other side is the discharging side at a low position. In normal operation, the screen rotates in the circumferential direction indicated by the upper screen, i.e., counterclockwise in fig. 2. The ore pulp is sent into the drum sieve from the lower part of the high end of the drum sieve through an ore pulp groove or a pipeline, the drum sieve rotates along the circumferential direction of the upper-layer sieve sheet, the ore pulp slides downwards along the upper-layer sieve sheet while rising, large particles or large-volume slurry are blocked at the inner side of the upper-layer sieve sheet, the classification of the large particles is completed, more importantly, the load of an outer main screen is dispersed, relatively concentrated settlement accumulation cannot be formed on the main screen, and screen holes are not easy to block. The large particles sliding down from the upper-layer screen can not fall on the outer-layer main screen mesh, but gradually slide down to the lower-level upper-layer screen mesh, and thus, the large particles slide out together from the lower end of the drum screen and the secondary large particles on the main screen mesh to complete screening. The device is efficient to use and does not block the screen holes.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. An anti-clogging trommel, comprising:

the device comprises a main shaft, a cross beam, a keel steel frame, roller spokes, an upper-layer screen sheet and an outer-layer main screen;

the upper-layer sieve sheet is arranged in a square area defined by connecting end points of two axially adjacent roller spokes and a beam between two axially adjacent roller spokes;

a flexible isolating layer is arranged between the inner side of the outer layer main screen and the upper layer screen sheet;

the included angle between two circumferentially adjacent roller spokes is 45 degrees;

on the circumferential plane of the same main shaft, the keel steel frames are connected between the vertical connecting points and the end points of the drum spokes on the counterclockwise side of the vertical connecting points.

2. An anti-clogging trommel as claimed in claim 1 wherein said flexible barrier layer is of nylon and/or resin.

3. An anti-clogging trommel as claimed in claim 1 wherein said upper screen sheet has an aperture 3 to 100 times the aperture of said outer primary screen.

4. The anti-blocking drum screen according to claim 1, further comprising a frame, a motor, a coupler, a speed reducer and a bearing seat, wherein the motor, the speed reducer and the bearing seat are all arranged on the frame; in the power transmission direction, the motor, the speed reducer and the main shaft are sequentially connected, the motor and the speed reducer and the main shaft are connected through the coupler, and the main shaft is connected to the bearing seat.

5. An anti-clogging trommel as claimed in any one of claims 1 to 4 wherein said upper screen sheet is planar or curved in shape.