CN217911575U

CN217911575U - Screening plant of narrow size fraction of many gradients

Info

Publication number: CN217911575U
Application number: CN202221912502.8U
Authority: CN
Inventors: 周成龙; 史培宁; 白霄; 王小伟; 赵育杰; 包永红
Original assignee: CHINA COAL XI'AN DESIGN ENGINEERING CO LTD
Current assignee: CHINA COAL XI'AN DESIGN ENGINEERING CO LTD
Priority date: 2022-07-22
Filing date: 2022-07-22
Publication date: 2022-11-29
Anticipated expiration: 2032-07-22

Abstract

The utility model discloses a screening plant of narrow size fraction of many gradients, including the main frame, the raw coal entry has been seted up on the upper portion of main frame, and the slope has set gradually upper screen plate spare and lower floor's sieve downwards in the main frame, and the main frame corresponds upper screen plate and is provided with slide rail set, and upper screen plate and lower floor's sieve are constituteed by the radial sieve axle of arranging of a plurality of, and every sieve axle is provided with the sieve piece along its circumference, and the lower part of main frame corresponds main frame, upper screen plate spare and lower floor's sieve and is provided with the result export. The utility model discloses a design conveniently rationally, based on the advantage of double-deck shale shaker and multistage roller bearing sieve, improved not enough of present double-deck shale shaker and multistage roller bearing sieve simultaneously to a certain extent, can make the material can carry out the narrow size fraction screening of many gradients effectively, have certain practical meaning.

Description

Screening plant of narrow size fraction of many gradients

Technical Field

The utility model belongs to the technical field of coal production processing auxiliary assembly, concretely relates to screening plant of narrow size fraction of many gradients.

Background

Coal, one of the most important energy sources, will not change its dominance in primary energy consumption structures for a considerable time in the future. The existing common washing processes such as jigging coal separation, dense medium coal separation and the like and intelligent dry separation and other processes have requirements on the range of the fed material size fraction, and the narrow size fraction fed material can effectively improve the separation precision. At present, a relatively mature coal dressing method is to treat and process a plurality of size fractions of raw coal, such as large lump coal (+ 80 mm), lump coal (80-30 mm), slack coal (-30 mm) and the like, respectively, so that a multi-gradient grading device before washing is very important. The conventional multi-gradient grading equipment comprises a double-layer vibrating screen and a multi-section roller screen, wherein an upper-layer screen plate of the double-layer vibrating screen is used for processing more materials, large materials can be separated out firstly due to large screen holes of the upper-layer screen plate, the grading pressure of a lower-layer screen plate is reduced, but the double-layer vibrating screen is large in dust, easy to block the screen holes, large in dynamic load and high in requirements for civil engineering structures of plants; the roller screen can effectively solve the problem of screen hole blockage through the 'moving screen holes' formed between the screen pieces, but the screen holes of the feeding section of the multi-section roller screen are small, and the number of processed materials is large, so that the screening efficiency of the feeding section is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a screening plant of narrow size fraction of many gradients has solved the problem that the sieve mesh is blockked up easily and screening efficiency is not high to the material that exists in the present many gradients classification equipment.

The technical proposal adopted by the utility model is that;

the utility model provides a screening plant of narrow size fraction of many gradients, includes the main frame, and the raw coal entry has been seted up on the upper portion of main frame, and the slope has set gradually upper sieve and lower floor's sieve in the main frame downwards, and the main frame corresponds upper sieve and is provided with slide rail group, and upper sieve and lower floor's sieve are constituteed by the radial sieve axle of arranging of a plurality of, and every sieve axle is provided with the sieve piece along its circumference, and the product export has been seted up to the lower part of main frame corresponding upper sieve spare and lower floor's sieve.

The utility model is also characterized in that;

the slide rail group includes first track and second track, and the upper screen deck passes through first track and second track and sets up in the main frame, and the upper screen deck can be followed first track and second track and slided.

The sieve pore of the upper layer sieve plate is set to be 50-80mm, and the sieve pore of the lower layer sieve plate is set to be 6-30mm.

The inclined directions of the upper-layer sieve plate and the lower-layer sieve plate are consistent.

The product outlet comprises an upper-layer product outlet, a lower-layer product outlet and a lower-layer after-screening product outlet which are arranged at the bottom of the main frame, the upper-layer product outlet corresponds to the upper-layer sieve plate and the upper region of the main frame, the lower-layer product outlet corresponds to the upper-layer sieve plate and the lower-layer sieve plate, and the lower-layer after-screening product outlet corresponds to the lower-layer sieve plate and the lower region of the main frame.

The utility model has the advantages that: the utility model relates to a screening plant of narrow size fraction of many gradients, the advantage of referring to double-deck shale shaker and multistage roller screen: the upper screen plate and the lower screen plate all adopt the roller bearing screen plate of "moving the sieve mesh", can effectively solve the problem that the material blockked up the sieve mesh, and the sieve mesh of upper screen plate is big simultaneously, and the processing material is many, can separate out bold material earlier, reduces the classification pressure of lower floor's sieve, improves the screening efficiency of lower floor's sieve. The screening device has small dynamic load and low requirement on a civil engineering structure. Simultaneously the utility model discloses the device can be according to the production demand of different technologies adjust the aperture of upper sieve plate and lower floor's sieve. The upper sieve plate is arranged on the track, so that the upper sieve plate can slide along the track during maintenance, and a space is provided for maintenance of the lower sieve plate.

Drawings

Fig. 1 is a schematic structural diagram of the multi-gradient narrow-size-fraction screening device of the present invention.

In the figure, 1 is a main frame, 2 is an upper screen plate, 3 is a lower screen plate, 4 is a screen shaft, 5 is a screen sheet, 6 is a first track, 7 is a second track, 8 is a raw coal inlet, 9 is an upper product outlet, 10 is a lower product outlet, and 11 is a lower screen product outlet.

Detailed Description

The present invention is further described in detail with reference to the drawings and the detailed description.

Referring to fig. 1, the utility model relates to a screening plant of narrow size fraction of many gradients, including main frame 1, upper screen 2, lower floor's screen 3, sieve axle 4, sieve piece 5, first track 6, second track 7, the product export. The 5 intervals of multiunit sieve piece are fixed on sieve axle 4, and a plurality of sieve axles 4 are arranged together and are constituted the sieve, and upper sieve plate 2 and lower floor's sieve 3 all have a plurality of sieve axles 4 to constitute, and lower floor's sieve 3 is fixed on the main frame, and upper sieve plate 2 is fixed on main frame 1 through first track 6, second track 7. The bottom of the main frame 1 is provided with a product outlet, and the top is provided with a raw coal inlet 8.

As an embodiment, the utility model relates to a screening plant of narrow size fraction of many gradients can prolong first track 6 and second track 7 with upper sieve board (2) and slide when overhauing, and then overhauls for lower floor's sieve (3) and provides the space.

As an embodiment, the utility model relates to a screening plant of narrow size fraction of many gradients's upper sieve plate 2's sieve mesh is between 50-80mm, and the sieve mesh of lower floor's sieve plate 3 is between 6-30mm, certainly, also is not limited to this, can be according to operating mode actual need, in the aperture size of reasonable within range adjustment and selection sieve mesh.

The utility model relates to a screening plant of narrow size fraction of many gradients's theory of operation and process: raw coal enters the upper-layer sieve plate 2 through the raw coal inlet 8 to be sieved, the sieve pores of the upper-layer sieve plate 2 are large, the handling capacity is large, large materials can be separated, the formed large materials are fed to the upper-layer product outlet 9, materials with the particle size smaller than that of the upper-layer sieve plate 2 enter the lower-layer sieve plate 3 to be classified, and the materials in the region can be taken out from the lower-layer product outlet 10 as required. Because the bold material has been separated by upper screen 2, consequently the material that gets into lower floor sieve 3 is less, and sieve surface material layer thickness is little, can effectively improve the screening efficiency of lower floor sieve. The product outlet 11 after the lower-layer sieve is formed after the lower-layer sieve plate 3 is classified, so that the multi-gradient classification of the raw coal is realized, and a better basis is provided for the subsequent efficient separation process.

The utility model relates to a screening plant of narrow size fraction of many gradients through convenient reasonable design, based on the advantage of double-deck shale shaker and multistage roller bearing sieve, has improved the not enough of present double-deck shale shaker and multistage roller bearing sieve simultaneously to a certain extent, can be so that the material can carry out the screening of the narrow size fraction of many gradients effectively, has certain practical meaning.

Claims

1. The utility model provides a screening plant of narrow size fraction of many gradients, its characterized in that, includes main frame (1), raw coal entry (8) have been seted up on the upper portion of main frame (1), main frame (1) is inside to slope down in proper order and is provided with upper sieve board (2) and lower floor's sieve (3), main frame (1) is provided with slide rail group corresponding upper sieve board (2), upper sieve board (2) and lower floor's sieve (3) are constituteed by sieve axle (4) that a plurality of was radially arranged, every sieve axle (4) are provided with sieve piece (5) along its circumference, the product export has been seted up to the lower part of main frame (1) correspondence upper sieve board (2) spare and lower floor's sieve (3).

2. A multi-gradient narrow size fraction screening device as claimed in claim 1, wherein: the sliding rail set comprises a first rail (6) and a second rail (7), the upper-layer sieve plate (2) is arranged on the main frame (1) through the first rail (6) and the second rail (7), and the upper-layer sieve plate (2) can slide along the first rail (6) and the second rail (7).

3. A multi-gradient narrow size fraction screening device as claimed in claim 1, wherein: the sieve holes of the upper layer sieve plate (2) are set to be 50-80mm, and the sieve holes of the lower layer sieve plate (3) are set to be 6-30mm.

4. A multi-gradient narrow size fraction screening device as claimed in claim 1, wherein: the inclined directions of the upper-layer sieve plate (2) and the lower-layer sieve plate (3) are consistent.

5. A multi-gradient narrow size fraction screening device as claimed in claim 1, wherein: the product export is including offering in upper product export (9), lower floor's product export (10) and the lower floor sieve back product export (11) of main frame (1) bottom, upper product export (9) are corresponding to the region on upper sieve board (2) and main frame (1) upper portion, lower floor's product export (10) are corresponding to the region of upper sieve board (2) and lower floor sieve (3), lower floor sieve back product export (11) are corresponding to the region of lower floor sieve board (3) and main frame (1) lower part.