CN112604782B

CN112604782B - Coal screening plant

Info

Publication number: CN112604782B
Application number: CN202011491569.4A
Authority: CN
Inventors: 艾珂宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2022-07-01
Anticipated expiration: 2040-12-17
Also published as: CN112604782A

Abstract

The invention relates to the technical field of coal screening, in particular to a coal screening device, which comprises: a feed hopper is fixed in the middle of the left side of the shell; an arc-shaped sieve plate is fixed at the lower end of the shell; the crushing mechanism is positioned below the discharge hole of the feed hopper; the extruding mechanism is positioned above the discharge hole of the feed hopper; the bent lever mechanism drives the extrusion mechanism to reciprocate up and down; the stirring mechanism is positioned in the shell and is in transmission connection with the crushing mechanism; the stirring mechanism stirs the coal particles on the arc-shaped sieve plate. The crushing device provided by the invention firstly crushes coal and then screens the crushed coal. The coal is crushed and simultaneously extruded, so that the effective crushing of the coal is realized, and the crushing effect and the crushing efficiency are improved; coal particles which can not pass through the sieve holes can be pushed to the outside of the shell while sieving.

Description

Coal screening plant

Technical Field

The invention relates to the technical field of coal screening, in particular to a coal screening device.

Background

The mined coal has different shapes and sizes, and needs to be crushed for the convenience of subsequent processing production. In the prior art, most of coal is crushed by adopting a device with a pendulum and a roller, and compared with manpower, the device has the advantages of high efficiency and labor intensity, but has the defects. The pendulum bob has a single structure, and can only coarsely crush coal, and crushed coal particles have great difference; roller extrusion can effectively avoid the problem that the pendulum exists, but the circular structure of cylinder leads to coal to appear skidding the phenomenon easily at kibbling in-process, influences the crushing work of coal. In addition, through the granularity of kibbling coal wherein not of uniform size, when screening, the sieve mesh on the sieve can be passed through to the tiny particle, and the oversize particle can not then pile up on the sieve through the sieve mesh, blocks up the sieve mesh easily and influences the passing through of tiny particle.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Disclosure of Invention

The invention aims to provide a coal screening device to solve the problem.

In order to achieve the purpose, the invention provides the following technical scheme:

a coal screening device comprising:

the shell is of a hollow structure with an upper opening and a lower opening; a feed hopper communicated with the middle part of the left side of the shell is fixed at the middle part of the left side of the shell; a semicircular arc-shaped sieve plate protruding towards the lower end of the shell is fixed at the lower end of the shell, and sieve holes are uniformly formed in the arc-shaped sieve plate; the crushing mechanism is positioned in the shell and below the discharge hole of the feed hopper; the extruding mechanism is positioned in the shell and above the discharge port of the feed hopper; the bent lever mechanism is positioned in the shell and is in transmission connection with the crushing mechanism and the extrusion mechanism; the bent lever mechanism drives the extrusion mechanism to reciprocate up and down; the stirring mechanism is positioned in the shell and is in transmission connection with the crushing mechanism; the stirring mechanism stirs the coal particles on the arc-shaped sieve plate.

Preferably, the pulverization mechanism includes: the crushing device comprises a first crushing roller, a second crushing roller, a first straight gear, a second straight gear, a third straight gear, a fourth straight gear, a fifth straight gear, a sixth straight gear, a driving motor and a seventh straight gear, wherein two ends of the first crushing roller and two ends of the second crushing roller are rotatably connected to a shell through bearings respectively; the first straight gear and the second straight gear are correspondingly fixed at the front end and the rear end of the first crushing roller; the third straight gear and the fourth straight gear are correspondingly fixed at the front end and the rear end of the second crushing roller; the fifth straight gear is meshed with the sixth straight gear and is respectively connected to the front end of the shell in a rotating mode through a bearing, and the fifth straight gear is meshed with the first straight gear and the sixth straight gear is meshed with the third straight gear; the driving motor is fixed on the ground; and the seventh straight gear is fixed on an output shaft of the driving motor and is in transmission connection with the fourth straight gear through a first chain.

Preferably, the pressing mechanism includes: the hinge plate, the extrusion plate and the buffer spring, wherein a limiting hole is formed in each of four vertex angles and the central position of the hinge plate; a limiting shaft corresponding to the limiting hole is vertically arranged on the upper surface of the extrusion plate, and a limiting plate is formed after the top of the limiting shaft penetrates through the limiting hole; the buffering spring is sleeved on the limiting shaft, the top of the buffering spring is abutted against the hinged plate, and the bottom of the buffering spring is abutted against the extrusion plate.

Preferably, a sealing plate is welded on the upper surface of one end of the extrusion plate, which is close to the outlet of the feed hopper; and the hinged plate is provided with a limiting notch corresponding to the sealing plate.

Preferably, the lower surface of the pressing plate is uniformly fixed with vertically downward blades.

Preferably, the curved bar mechanism comprises a curved bar, a hinged bar and an eighth spur gear, and the curved bar is rotatably connected to the machine shell through a bearing; the upper end of the hinge rod is hinged on the curved rod, and the lower end of the hinge rod is hinged on the hinge plate; and the eighth straight gear is fixed at the rear end of the curved bar and is in transmission connection with the second straight gear through a second chain.

Preferably, a discharge port is formed in the right side wall of the casing, and the discharge port is flush with the upper end of the arc-shaped sieve plate from the lower end to the upper end; the stirring mechanism comprises a stirring shaft, a connecting rod, an arc-shaped plate, a guide plate, a ninth straight gear and a tenth straight gear, wherein two ends of the stirring shaft are rotatably connected to the casing through bearings, and the axial lead of the stirring shaft is superposed with the axial lead of the arc-shaped sieve plate; a plurality of connecting rods are symmetrically arranged on the stirring shaft; the arc-shaped plate is fixed at one end of the connecting rods, which is far away from the stirring shaft, and the arc-shaped plate is attached to the arc-shaped sieve plate; the guide plate is obliquely fixed at the front end of the arc-shaped plate in the advancing direction; the ninth straight gear is fixed at the front end of the second crushing roller; the tenth straight gear is fixed at the front end of the stirring shaft and is in transmission connection with the ninth straight gear through a third chain.

Compared with the prior art, the invention has the following beneficial effects:

(1) the screening device provided by the invention is used for firstly crushing the coal particles and then screening the crushed coal particles. The crushing mechanism is linked with the extruding mechanism, the bent rod mechanism and the stirring mechanism, the crushing mechanism drives the bent rod mechanism to operate in the process of crushing coal, the extruding mechanism is driven to move up and down in the operation process of the bent rod mechanism to extrude the coal in the casing so as to prevent the coal from slipping, and the crushing effect and the crushing efficiency of the coal can be improved. Simultaneously rubbing crusher constructs and drives the rabbling mechanism operation, and the rabbling mechanism operation is stirs the coal granule that is located on the arc sieve, avoids the coal granule of great granule to block up the sieve mesh, and in addition, the rabbling mechanism will not push away the outside of casing through the coal granule of sieve mesh when the stirring. Through the linkage of some of the above-mentioned columns, can realize smashing and screening to coal granule, improve the efficiency and the effect of screening simultaneously.

(2) The extrusion mechanism can realize the intermittent feeding of coal into the shell in the operation process, prevents the coal to be crushed from accumulating in the shell to influence the rotation of the whole device, and improves the rationality and reliability of the whole device. In addition, the buffer spring, the limiting shaft and other parts of the extrusion mechanism can prevent the extrusion plate from being in hard contact with coal to be crushed, so that the phenomenon of blocking of the extrusion mechanism and the crank mechanism is avoided, and the stability of the whole device is improved. Secondly, the last cutting edge that sets up of stripper plate, the cutting edge can be treated kibbling coal and play certain crushing effect, and then improves the crushing effect and the crushing efficiency of coal.

(3) According to the invention, through arranging the crushing mechanism, the extruding mechanism, the bent rod mechanism and the stirring mechanism which are linked, coal is firstly crushed and then screened. The coal is crushed and simultaneously extruded, so that the effective crushing of the coal is realized, and the crushing effect and the crushing efficiency are improved; coal particles which can not pass through the sieve holes can be pushed to the outside of the shell while sieving. The whole device has scientific and reasonable design and better stability and reliability.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a rear view of FIG. 1;

FIG. 4 is a schematic view of the inner structure of the housing of FIG. 1 after being cut away;

FIG. 5 is a front view of FIG. 4;

FIG. 6 is a schematic view of the pressing mechanism of the present invention;

FIG. 7 is an exploded view of FIG. 6;

100. a housing; 101. a feed hopper; 102. an arc-shaped sieve plate; 1021. screening holes; 103. a discharge port;

200. a crushing mechanism; 201. a first crushing roller; 202. a second crushing roller; 203. a first straight gear; 204. a second spur gear; 205. a third spur gear; 206. a fourth spur gear; 207. a fifth spur gear; 208. a sixth spur gear; 209. a drive motor; 210. a seventh spur gear; 211. a first chain;

300. an extrusion mechanism; 301. a hinge plate; 3011. a limiting hole; 3012. a limiting notch; 302. a pressing plate; 3021. a limiting shaft; 3022. a limiting plate; 3023. a sealing plate; 3024. a blade; 303. a buffer spring;

400. a knee lever mechanism; 401. a curved bar; 402. a hinged lever; 403. an eighth spur gear; 404. a second chain;

500. a stirring mechanism; 501. a stirring shaft; 502. a connecting rod; 503. an arc-shaped plate; 504. a baffle; 505. a ninth spur gear; 506. a tenth spur gear; 507. and a third chain.

Detailed Description

In the following, the technical solutions of the present invention will be described clearly and completely, and it is obvious that the described embodiments are some, not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

Referring to figures 1-7, a coal screening apparatus comprising:

a casing 100, wherein the casing 100 is a hollow structure with an upper opening and a lower opening; a feed hopper 101 communicated with the middle part of the left side of the shell 100 is fixed at the middle part of the left side of the shell; a semicircular arc-shaped sieve plate 102 protruding towards the lower end of the casing 100 is fixed at the lower end of the casing 100, and sieve holes 1021 are uniformly formed in the arc-shaped sieve plate 102; a discharge port 103 is formed in the right side wall of the casing 100, and the discharge port 103 is flush with the upper end of the arc-shaped sieve plate 102 from the lower end to the upper end;

the crushing mechanism 200 is positioned in the shell 100 and below the discharge hole of the feed hopper 101; in this embodiment, the specific structure of the pulverizing mechanism 200 is: the crushing mechanism 200 comprises a first crushing roller 201, a second crushing roller 202, a first spur gear 203, a second spur gear 204, a third spur gear 205, a fourth spur gear 206, a fifth spur gear 207, a sixth spur gear 208, a driving motor 209 and a seventh spur gear 210, wherein two ends of the first crushing roller 201 and the second crushing roller 202 are rotatably connected to the machine casing 100 through bearings, respectively, and it can be understood that: the first crushing roller 201 and the second crushing roller 202 rotate oppositely, that is, referring to fig. 4, the first crushing roller 201 rotates clockwise, and the second crushing roller 202 rotates counterclockwise; a first spur gear 203 and a second spur gear 204 are correspondingly fixed at the front end and the rear end of the first crushing roller 201; a third spur gear 205 and a fourth spur gear 206 are correspondingly fixed at the front end and the rear end of the second crushing drum 202; the fifth spur gear 207 and the sixth spur gear 208 are engaged and rotatably connected to the front end of the casing 100 through bearings, respectively, and the fifth spur gear 207 is engaged with the first spur gear 203, and the sixth spur gear 208 is engaged with the third spur gear 205, as will be understood herein: the fifth spur gear 207 and the sixth spur gear 208 need to be fixed on a rotating shaft, and then the rotating shaft is rotatably connected to the casing 100 through a bearing; the driving motor 209 is fixed on the ground; the seventh spur gear 210 is fixed on the output shaft of the driving motor 209 and is in transmission connection with the fourth spur gear 206 via a first chain 211.

The extruding mechanism 300 is positioned in the shell 100 and above the discharge hole of the feed hopper 101; in this embodiment, the specific structure of the pressing mechanism 300 is: the extrusion mechanism 300 comprises a hinged plate 301, an extrusion plate 302 and a buffer spring 303, wherein a limiting hole 3011 is formed at each of four vertex angles and the central position of the hinged plate 301; a limiting shaft 3021 corresponding to the limiting hole 3011 is vertically arranged on the upper surface of the extrusion plate 302, and a limiting plate 3022 is formed after the top of the limiting shaft 3021 penetrates through the limiting hole 3011; the buffer spring 303 is sleeved on the limiting shaft 3021, and the top of the buffer spring abuts against the hinge plate 301 and the bottom abuts against the extrusion plate 302.

The curved bar mechanism 400 is positioned in the machine shell 100 and is in transmission connection with the crushing mechanism 200 and the extrusion mechanism 300; the curved bar mechanism 400 drives the extrusion mechanism 300 to reciprocate up and down; in this embodiment, the specific structure of the knee lever mechanism 400 is: the curved bar mechanism 400 comprises a curved bar 401, a hinged bar 402 and an eighth spur gear 403, wherein the curved bar 401 is rotatably connected to the machine shell 100 through a bearing; the upper end of the hinge rod 402 is hinged on the curved rod 401, and the lower end is hinged on the hinge plate 301; an eighth spur gear 403 is fixed at the rear end of the curved bar 401 and is in driving connection with the second spur gear 204 via a second chain 404.

The stirring mechanism 500 is positioned in the machine shell 100 and is in transmission connection with the crushing mechanism 200; the stirring mechanism 500 stirs the coal particles on the arc-shaped sieve plate 102; in this embodiment, the specific structure of the stirring mechanism 500 is: the stirring mechanism 500 comprises a stirring shaft 501, a connecting rod 502, an arc-shaped plate 503, a guide plate 504, a ninth spur gear 505 and a tenth spur gear 506, wherein two ends of the stirring shaft 501 are rotatably connected to the machine shell 100 through bearings, and the axial lead of the stirring shaft 501 is superposed with the axial lead of the arc-shaped sieve plate 102; a plurality of connecting rods 502 are symmetrically arranged on the stirring shaft 501; the arc-shaped plate 503 is fixed at one end of the plurality of connecting rods 502 far away from the stirring shaft 501, and the arc-shaped plate 503 is attached to the arc-shaped sieve plate 102, where it is not difficult to understand that: the number of the arc-shaped plates 503 is also 2, and the 2 arc-shaped plates 503 are correspondingly fixed at one ends of the connecting rods 502 far away from the stirring shaft 501; the guide plate 504 is obliquely fixed at the front end of the advancing direction of the arc-shaped plate 503; a ninth spur gear 505 is fixed to the front end of the second crushing roller 202; a tenth spur gear 506 is fixed at the front end of the stirring shaft 501 and is in transmission connection with a ninth spur gear 505 through a third chain 507.

Secondly, in the present embodiment, a sealing plate 3023 is welded to the upper surface of one end of the extrusion plate 302 near the outlet of the feeding hopper 101; the hinged plate 301 is provided with a limiting notch 3012 corresponding to the sealing plate 3023; a vertically downward blade 3024 is uniformly fixed on the lower surface of the pressing plate 302.

The working principle of the coal pulverizing apparatus of the present embodiment is specifically described below with reference to the accompanying drawings: the coal to be pulverized is continuously fed into the feed hopper 101 by means of an external conveyor belt.

When the driving motor 209 works, the driving motor 209 drives the fourth spur gear 206 to rotate through the seventh spur gear 210 and the first chain 211, the fourth spur gear 206 drives the second crushing roller 202 and the third spur gear 205 to rotate, the third spur gear 205 drives the first spur gear 203 to rotate through the fifth spur gear 207 and the sixth spur gear 208 when rotating, the first spur gear 203 drives the first crushing roller 201 and the second spur gear 204 to rotate, the driving motor 209 drives the first crushing roller 201 and the second crushing roller 202 to rotate through the above-mentioned some columns of transmission, and the coal entering the machine shell 100 is crushed when the first crushing roller 201 and the second crushing roller 202 rotate.

When the second spur gear 204 rotates, the eighth spur gear 403 is driven to rotate by the second chain 404, when the eighth spur gear 403 rotates, the curved rod 401 is driven to rotate, when the curved rod 401 rotates, the whole extrusion mechanism 300 rotates up and down by the hinge rod 402, and the crushing mechanism 200, the curved rod mechanism 400 and the extrusion mechanism 300 are linked by the transmission of the above series.

During the downward movement of the pressing mechanism 300, the pressing plate 302 firstly abuts against and presses the coal located in the casing 100, which facilitates the coal pulverization by the pulverizing mechanism 200. Meanwhile, in the process that the extrusion plate 302 extrudes coal, the coal also generates upward thrust to the extrusion plate 302, under the action of the thrust, the buffer spring 303 contracts, and the limiting shaft 3021 slides upwards along the limiting hole 3011, so that the phenomenon that the crank mechanism 400 is blocked and the whole device is damaged can be avoided. In addition, the blade 3024 provided on the pressing plate 302 can press the coal to perform a predetermined crushing function, thereby further facilitating the crushing of the coal by the crushing mechanism 200. Secondly, in the process that the extrusion plate 302 moves downwards, the extrusion plate 302 drives the sealing plate 3023 to move downwards together to seal the discharge hole of the feeding hopper 101, so that coal intermittently enters the casing 100, and the influence of a large amount of coal entering the casing 100 on the normal operation of the whole device is prevented.

Finally, the coal crushed by the crushing mechanism 200 falls onto the arc-shaped sieve plate 102 at the bottom of the casing 100, wherein the coal with small particles passes through the sieve holes 1021 and falls outside the casing 100, and the large particles cannot pass through the sieve holes 1021 and stay on the arc-shaped sieve plate 102 and roll down to the lower part of the arc-shaped sieve plate 102 due to the gravity of the large particles. In the process of rotating the second crushing roller 202, the second crushing roller 202 drives the stirring shaft 501 to rotate through the ninth spur gear 505, the third chain 507 and the tenth spur gear 506, and the stirring shaft 501 drives the arc-shaped plate 503 and the guide plate 504 to rotate through the connecting rod 502. The arc-shaped plate 503 and the guide plate 504 push the coal particles on the arc-shaped sieve plate 102 to move upwards in the rotating process, and in the moving process, part of the coal particles are loosened and reduced by the friction of the arc-shaped sieve plate 102 and then pass through the sieve holes 1021 to fall to the outside of the casing 100; the rest of the coal particles are retained between the flow guide plate 504 and the arc-shaped sieve plate 102, when the coal particles move upwards to the discharge port 103, the coal particles are pushed to the outside of the casing 100 from the discharge port 103 by the arc-shaped plate 503 and the flow guide plate 504, and then the coal particles are collected.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims

1. A coal screening device, comprising:

the shell is of a hollow structure with an upper opening and a lower opening; a feed hopper communicated with the middle part of the left side of the shell is fixed in the middle of the left side of the shell; a semicircular arc-shaped sieve plate protruding towards the lower end of the shell is fixed at the lower end of the shell, and sieve holes are uniformly formed in the arc-shaped sieve plate;

the crushing mechanism is positioned inside the shell and below the discharge hole of the feed hopper;

the extruding mechanism is positioned in the shell and above the discharge port of the feed hopper;

the bent lever mechanism is positioned in the shell and is in transmission connection with the crushing mechanism and the extrusion mechanism; the bent lever mechanism drives the extrusion mechanism to reciprocate up and down;

the stirring mechanism is positioned in the shell and is in transmission connection with the crushing mechanism; the stirring mechanism is used for stirring the coal particles on the arc-shaped sieve plate;

wherein, rubbing crusher constructs including: the crushing device comprises a first crushing roller, a second crushing roller, a first straight gear, a second straight gear, a third straight gear, a fourth straight gear, a fifth straight gear, a sixth straight gear, a driving motor and a seventh straight gear, wherein two ends of the first crushing roller and two ends of the second crushing roller are rotatably connected to a shell through bearings respectively; the first straight gear and the second straight gear are correspondingly fixed at the front end and the rear end of the first crushing roller; the third straight gear and the fourth straight gear are correspondingly fixed at the front end and the rear end of the second crushing roller; the fifth straight gear is meshed with the sixth straight gear and is respectively connected to the front end of the shell in a rotating mode through a bearing, and the fifth straight gear is meshed with the first straight gear and the sixth straight gear is meshed with the third straight gear; the driving motor is fixed on the ground; the seventh straight gear is fixed on an output shaft of the driving motor and is in transmission connection with the fourth straight gear through a first chain;

the pressing mechanism includes: the hinge plate, the extrusion plate and the buffer spring, wherein a limiting hole is formed in each of four vertex angles and the central position of the hinge plate; a limiting shaft corresponding to the limiting hole is vertically arranged on the upper surface of the extrusion plate, and a limiting plate is integrally formed after the top of the limiting shaft penetrates through the limiting hole; the buffering spring is sleeved on the limiting shaft, the top of the buffering spring is abutted against the hinged plate, and the bottom of the buffering spring is abutted against the extrusion plate; a sealing plate is welded on the upper surface of one end of the extrusion plate, which is close to the outlet of the feed hopper; the hinged plate is provided with a limiting notch corresponding to the sealing plate;

the crank rod mechanism comprises a crank rod, a hinge rod and an eighth straight gear, and the crank rod is rotatably connected to the shell through a bearing; the upper end of the hinge rod is hinged on the curved rod, and the lower end of the hinge rod is hinged on the hinge plate; the eighth straight gear is fixed at the rear end of the curved bar and is in transmission connection with the second straight gear through a second chain;

a discharge port is formed in the right side wall of the casing, and the discharge port is flush with the upper end of the arc-shaped sieve plate from the lower end to the upper end; the stirring mechanism comprises a stirring shaft, a connecting rod, an arc-shaped plate, a guide plate, a ninth straight gear and a tenth straight gear, wherein two ends of the stirring shaft are rotatably connected to the casing through bearings, and the axial lead of the stirring shaft is superposed with the axial lead of the arc-shaped sieve plate; a plurality of connecting rods are symmetrically arranged on the stirring shaft; the arc-shaped plate is fixed at one end of the connecting rods, which is far away from the stirring shaft, and the arc-shaped plate is attached to the arc-shaped sieve plate; the guide plate is obliquely fixed at the front end of the arc-shaped plate in the advancing direction; the ninth straight gear is fixed at the front end of the second crushing roller; and the tenth straight gear is fixed at the front end of the stirring shaft and is in transmission connection with the ninth straight gear through a third chain.

2. The coal screening device of claim 1, wherein the lower surface of the squeeze plate has vertically downward cutting edges uniformly fixed thereto.