CN117181425A

CN117181425A - Coal crushing device

Info

Publication number: CN117181425A
Application number: CN202311165906.4A
Authority: CN
Inventors: 谷红敏; 郭亚平; 成宇; 魏聚广; 常青蕊
Original assignee: Aerospace Hydrogen Energy Xinxiang Gas Co ltd
Current assignee: Aerospace Hydrogen Energy Xinxiang Gas Co ltd
Priority date: 2023-09-11
Filing date: 2023-09-11
Publication date: 2023-12-08

Abstract

The invention relates to the technical field of coal crushing, and provides a coal crushing device, which comprises a frame, a flushing device, a conveying device, a hopper and a crushing device, wherein the flushing device, the conveying device, the hopper and the crushing device are sequentially arranged on the frame, the inner wall of the outlet end of the hopper is semicircular, an anti-blocking mechanism is additionally arranged in the hopper, the anti-blocking mechanism comprises a rotating shaft and a partition plate, the rotating shaft is rotationally arranged in the hopper around the axis of the hopper, the partition plates are uniformly arranged on the outer circle of the rotating shaft, the outer end parts of the partition plates are attached to the semicircular inner wall of the hopper, and the distance between the two adjacent partition plate end parts is larger than the outlet width of the hopper. Through above-mentioned technical scheme, the easy problem of blockking up in coal reducing mechanism feed inlet department among the prior art has been solved.

Description

Coal crushing device

Technical Field

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

Background

Coal is a solid combustible mineral in which ancient plants are buried under the ground and undergo complex biochemical and physicochemical changes gradually, and the supply of coal is related to the stability of development of industry and even the whole social aspect. In order to facilitate loading and transportation and also to increase the contact area with oxygen, coal mining is followed by a pulverization treatment. In the prior art, a coal crusher is adopted to crush coal, and when coal is conveyed into the coal crusher, the coal crusher is often blocked at an inlet due to insufficient crushing efficiency or overlarge conveying speed, so that normal work is influenced; because the coal seals the feed inlet and the coal is continuously conveyed on line, the maintenance work after the blockage is caused to be time-consuming and labor-consuming; on the other hand, coal is excavated from underground ore layers through mechanical means, the coal mine products are not simply composed of coal, the mined coal mine also contains impurities such as soil, ash and the like, the impurities are not only sources of dust in crushing, but also influence the quality of coal products, in order to remove the soil and the ash in the coal, the coal needs to be cleaned before crushing, the drying process after cleaning needs longer, and the production efficiency is indirectly reduced. Aiming at the problems, the prior art does not solve the problems well, and the trouble is brought to the normal operation in the field, so that a coal crushing device capable of effectively preventing blockage is needed.

Disclosure of Invention

The invention provides a coal crushing device, which solves the problem that a feed inlet of the coal crushing device in the related art is easy to block.

The technical scheme of the invention is as follows: the utility model provides a coal reducing mechanism, includes the frame and locates in proper order washing unit, conveyor, hopper and reducing mechanism in the frame, the inner wall of hopper exit end becomes semi-circular, add anti-blocking mechanism in the hopper, anti-blocking mechanism includes pivot and baffle, the pivot is around hopper axis rotates to be located in the hopper, the baffle is a plurality of, evenly locates on the pivot excircle, the laminating of baffle outer tip the semicircular inner wall of hopper, the distance between two adjacent baffle ends is greater than the export width of hopper.

As a further technical scheme, the method comprises the steps of,

the hopper is located the entrance top of reducing mechanism, the hopper export with have the pay-off passageway between the reducing mechanism entry, the pay-off passageway includes a plurality of swing boards, swing board one end articulate in reducing mechanism entrance, the other end butt is in the hopper outer wall.

As a further technical scheme, the method comprises the steps of,

the centrifugal mechanism comprises a centrifugal cylinder and a rotary table, the centrifugal cylinder is arranged on the frame, the rotary table and the centrifugal cylinder are coaxially arranged and rotationally arranged in the centrifugal cylinder, an annular blanking port is formed between the outer edge of the rotary table and the inner wall of the centrifugal cylinder, a plurality of rings of baffle rings are distributed on the rotary table along the radial direction, the baffle rings are intermittently arranged, and the inner side of the baffle rings is an inclined plane.

As a further technical scheme, the method comprises the steps of,

the inner wall of the centrifugal cylinder is provided with a magnetic layer, and the magnetic layer and the rotary table are positioned at the same height and used for adsorbing iron materials and magnetic materials.

As a further technical scheme, the method comprises the steps of,

the section of the centrifugal cylinder is polygonal, a cleaning assembly is slidably arranged on the inner wall of the centrifugal cylinder along the parallel direction of the axis, and a spiral slideway is arranged on the outer wall of the centrifugal cylinder and used for collecting materials scraped by the cleaning assembly.

As a further technical scheme, the method comprises the steps of,

the cleaning assembly comprises a sliding plate and a scraping plate, the sliding plate is arranged on the inner wall of the centrifugal cylinder in a sliding mode along the axis parallel direction, the inner wall of the centrifugal cylinder is provided with a blocking portion used for limiting the lowest position of the sliding plate, the scraping plate is arranged on the sliding plate in a swinging mode, and the sliding plate is provided with a first limiting portion and a second limiting portion used for respectively positioning the upper limit position and the lower limit position of the swinging of the scraping plate.

As a further technical scheme, the method comprises the steps of,

the automatic centrifugal barrel is characterized in that a lifting rod is arranged on the frame in a sliding mode along the direction parallel to the axis of the centrifugal barrel, a limiting roller is arranged at the bottom end of the lifting rod in a rotating mode, the limiting roller is horizontally arranged, a sliding groove is formed in the scraping plate, and the limiting roller is located in the sliding groove.

As a further technical scheme, the method comprises the steps of,

the flushing device comprises a vibrating plate, a vibrating motor and high-pressure spray heads, wherein the vibrating plate is obliquely arranged on the frame, the vibrating motor is arranged on the vibrating plate, the high-pressure spray heads are multiple and are arranged on the frame, the high-pressure spray heads are distributed along the direction parallel to the vibrating plate and are positioned above the vibrating plate, and the vibrating plate is provided with multiple water holes.

As a further technical scheme, the method comprises the steps of,

still include water circulation system, water circulation system is including basin, filter unit and the water storage tank that connects gradually, basin open top just is located the vibrating plate below, the water storage tank with high-pressure nozzle is connected.

As a further technical scheme, the method comprises the steps of,

the vibrating plate is internally provided with a prefabricated water channel, the prefabricated water channel is positioned at the front end of the vibrating plate, one end of the prefabricated water channel is connected with the water storage tank, and the other end of the prefabricated water channel is provided with an opening which is tightly attached to the surface of the vibrating plate.

The working principle and the beneficial effects of the invention are as follows: the possibility of clogging is reduced by changing the structure of the hopper feeding the crushing device. The inner wall design of specific hopper open end is semi-circular, and adds the pivot in its inside, installs a plurality of baffles on the pivot circumference, and pivot and hopper coaxial line set up, when making the pivot rotate, the baffle can be scraped and rubbed the hopper inner wall, and a plurality of baffles are with hopper internal separation for a plurality of cavity. During normal operation, the conveying device discharges materials into the hopper, and the cavities are sequentially communicated with the discharge port of the hopper along with the rotation of the rotating shaft, so that batch throttling steady flow discharging is realized, larger-volume coal is prevented from being accumulated at a time to the feed port of the crushing device, the possibility of blockage is greatly reduced, and the problem that the feed port of the coal crushing device is easy to block in the prior art is solved; in addition, the distance between two baffle tip is greater than the export width of hopper, so accessible makes the pivot stop rotate and controls the baffle position, realizes the closing of hopper export when two baffles are located the hopper export both sides respectively, when the jam condition takes place, controls the hopper export and closes, no longer feeds reducing mechanism, avoids the jam condition to be more serious.

Drawings

The invention will be described in further detail with reference to the drawings and the detailed description.

FIG. 1 is a schematic view of the overall shape connection of the coal pulverizer of the present invention;

FIG. 2 is an enlarged view of the invention at A in FIG. 1;

FIG. 3 is a schematic view of the centrifugal mechanism of the present invention;

FIG. 4 is a schematic view of a turntable according to the present invention;

FIG. 5 is a schematic cross-sectional view of a centrifuge bowl according to the present invention;

FIG. 6 is an enlarged view of FIG. 5B in accordance with the present invention;

FIG. 7 is a schematic view of the vertical section of the centrifuge bowl of the present invention;

FIG. 8 is an enlarged view of FIG. 7 at C in accordance with the present invention;

FIG. 9 is a schematic view of the scraper abutting the second limiting portion according to the present invention;

fig. 10 is a schematic view of the scraper abutting against the first limiting portion.

In the figure: 1. the device comprises a rack, 2, a flushing device, 3, a conveying device, 4, a hopper, 5, a smashing device, 6, a rotating shaft, 7, a partition board, 8, a feeding channel, 9, a swinging plate, 10, a centrifugal mechanism, 11, a centrifugal cylinder, 12, a rotary disc, 13, a blanking port, 14, a ring, 15, a magnetic layer, 16, a sliding plate, 17, a scraping plate, 18, a blocking part, 19, a first limiting part, 20, a second limiting part, 21, a lifting rod, 22, a limiting roller, 23, a sliding chute, 24, a vibrating plate, 25, a vibrating motor, 26, a high-pressure spray head, 27, a water hole, 28, a water tank, 29, a filtering unit, 30, a water storage tank, 31, a prefabricated water channel, 32 and a spiral slideway.

Detailed Description

The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1-10, this embodiment provides a coal smashing device 5, including frame 1 and locating in proper order washing unit 2, conveyor 3, hopper 4 and smashing device 5 on the frame 1, the inner wall of hopper 4 exit end becomes semi-circular, add anti-blocking mechanism in the hopper 4, anti-blocking mechanism includes pivot 6 and baffle 7, pivot 6 is around hopper 4 axis rotation is located in the hopper 4, baffle 7 is a plurality of, evenly locates on the pivot 6 excircle, baffle 7 outer tip laminating hopper 4 semi-circular inner wall, the distance between two adjacent baffle 7 tip is greater than the export width of hopper 4.

In this embodiment, the possibility of clogging is reduced by changing the structure of the hopper 4 that feeds the crushing device 5. The inner wall design of specific with hopper 4 open end is semi-circular, and adds pivot 6 in its inside, installs a plurality of baffles 7 on the pivot 6 circumference, and pivot 6 and hopper 4 coaxial line set up, and when making pivot 6 rotate, baffle 7 can scratch hopper 4 inner wall, and a plurality of baffles 7 are with hopper 4 internal partition for a plurality of cavity. During normal operation, the conveying device 3 drops materials into the hopper 4, and a plurality of cavities are sequentially communicated with the discharge port of the hopper 4 along with the rotation of the rotating shaft 6, so that batch throttling steady flow blanking is realized, larger-volume coal is prevented from being accumulated at a time to the feed port of the crushing device 5, the possibility of blockage is greatly reduced, and the problem that the feed port of the coal crushing device 5 is easy to block in the prior art is solved; in addition, the distance between the ends of the two clapboards 7 is larger than the outlet width of the hopper 4, so that the position of the clapboards 7 can be controlled by stopping the rotation of the rotating shaft 6, when the two clapboards 7 are respectively positioned on two sides of the outlet of the hopper 4, the outlet of the hopper 4 is controlled to be closed, the material is not fed to the crushing device 5 any more when the blockage occurs, and the blockage is avoided.

Further, the method also comprises the steps of,

the hopper 4 is located above the inlet of the smashing device 5, a feeding channel 8 is arranged between the outlet of the hopper 4 and the inlet of the smashing device 5, the feeding channel 8 comprises a plurality of swinging plates 9, one ends of the swinging plates 9 are hinged to the inlet of the smashing device 5, and the other ends of the swinging plates are abutted to the outer wall of the hopper 4.

In this embodiment, the feeding channel 8 between the hopper 4 and the smashing device 5 is composed of a plurality of swinging plates 9, the inward swinging rear sides of the swinging plates 9 are mutually abutted, and the end parts are abutted on the hopper 4 to form a sealing channel, so that the installation mode of the swinging plates 9 is designed to swing for facilitating overhauling and maintenance after blockage, and when the blockage occurs, the feeding channel 8 can be opened by outwards swinging the swinging plates 9, so that the feeding channel 8 is opened, the blockage can be observed conveniently, and meanwhile, the operation at the blockage position is also facilitated.

Further, the method also comprises the steps of,

the centrifugal mechanism 10 is arranged below the outlet of the crushing device 5, the centrifugal mechanism 10 comprises a centrifugal cylinder 11 and a rotary table 12, the centrifugal cylinder 11 is arranged on the frame 1, the rotary table 12 and the centrifugal cylinder 11 are coaxially arranged and rotationally arranged in the centrifugal cylinder 11, an annular blanking port 13 is formed between the outer edge of the rotary table 12 and the inner wall of the centrifugal cylinder 11, a plurality of rings of baffle rings 14 are radially distributed on the rotary table 12, the baffle rings 14 are discontinuously arranged, and the inner side of each baffle ring 14 is an inclined plane.

In this embodiment, a centrifugal mechanism 10 is provided for rapid drying of the washed and pulverized coal. The crushed coal falls to the rotary table 12, the rotary table 12 generates centrifugal force through high-speed rotation, the coal with the particle size of being crushed into a few millimeters is thrown to the blanking ports 13 around, and water stains adhered on the coal are separated through the centrifugal force, so that the drying degree of the coal is improved, in addition, the coal can be dried while being conveyed through the centrifugal mechanism 10, and the production efficiency is guaranteed while the coal is dried. When the turntable 12 rotates, coal is outwards dispersed by centrifugal force, the baffle ring 14 plays a role in blocking, the time of the coal on the turntable 12 is prolonged, the coal is subjected to the centrifugal force for a longer time, and the spin-drying effect is improved; in addition, the inner side of the baffle ring 14 is designed to be inclined surface, so that coal can pass over the baffle ring 14 by the inclined surface when subjected to large centrifugal force, and the centrifugal force applied to the coal is ensured to be large enough.

Further, the method also comprises the steps of,

the inner wall of the centrifugal barrel 11 is provided with a magnetic layer 15, and the magnetic layer 15 and the rotary table 12 are positioned at the same height and are used for adsorbing ferrous materials and magnetic materials.

In this embodiment, the inner wall of the centrifugal barrel 11 has the magnetic layer 15, and installs on the same height with the carousel 12, after the carousel 12 rotates and produces centrifugal force, not only can separate coal and water stain, can also make coal to dispersing all around through centrifugal force, thereby contact magnetic layer 15 around, after the coal contacted magnetic layer 15, wherein iron material and magnetic material just can adsorb on magnetic layer 15, and coal then continues to fall through annular blanking mouth 13, the separation of having realized the magnetic separation, it is emphasized that, in this embodiment, through carousel 12 rotation, cooperation magnetic layer 15 has realized centrifugal spin-drying simultaneously, separation of magnetic separation and normal transport, realize multiple functions in a process, thereby production efficiency has been improved.

Further, the method also comprises the steps of,

the section of the centrifugal cylinder 11 is polygonal, a cleaning assembly is slidably arranged on the inner wall of the centrifugal cylinder 11 along the axis parallel direction, and a spiral slideway 32 is arranged on the outer wall of the centrifugal cylinder 11 and used for collecting materials scraped by the cleaning assembly.

Further, the method also comprises the steps of,

the cleaning assembly comprises a sliding plate 16 and a scraping plate 17, the sliding plate 16 is arranged on the inner wall of the centrifugal barrel 11 in a sliding mode along the axis parallel direction, a blocking portion 18 used for limiting the lowest position of the sliding plate 16 is arranged on the inner wall of the centrifugal barrel 11, the scraping plate 17 is arranged on the sliding plate 16 in a swinging mode, and a first limiting portion 19 and a second limiting portion 20 are arranged on the sliding plate 16 and used for respectively positioning the upper limit position and the lower limit position of the swinging of the scraping plate 17.

In this embodiment, a cleaning component is slidably disposed on the inner wall of the centrifugal barrel 11 and is used for cleaning the material adsorbed by the magnetic layer 15, so as to ensure the utilization rate of the magnetic layer 15. Specifically, the cleaning assembly includes a sliding plate 16 and a scraper 17, the sliding plate 16 is slidably connected with the inner wall of the centrifugal barrel 11, a blocking portion 18 is provided at a lower portion of the inner wall of the centrifugal barrel 11, and the sliding plate 16 is blocked when it descends, thereby limiting the lowest limit position thereof, the scraper 17 is in swinging connection with the sliding plate 16, and the uppermost position and the lowermost position of the swinging of the scraper 17 are respectively limited by a first limiting portion 19 and a second limiting portion 20. When the scraping plate 17 swings to the uppermost position, an acute angle is formed between the scraping plate and the inner wall of the upper centrifugal cylinder 11, so that the inner wall of the upper centrifugal cylinder is convenient to scrape and scratch, the gathering effect is achieved, and the falling caused by overflow of excessive materials accumulated on the scraping plate 17 is prevented; when the scraper 17 swings to the lowest, an obtuse angle is formed between the scraper and the inner wall of the upper centrifugal barrel 11, so that the material is prevented from falling normally when the turntable 12 rotates normally, and the material gathers towards the center after contacting the scraper 17 and plays a guiding role. After the scraper 17 rises to the highest, the scraper protrudes out of the centrifugal barrel 11 to scrape out the material, the material at the moment is not adsorbed by the magnetic layer 15 any more, falls down along the outer wall of the centrifugal barrel 11 by self weight, falls into the spiral slideway 32, and realizes rapid collection of the material.

Further, the method also comprises the steps of,

the machine frame 1 is provided with a lifting rod 21 in a sliding manner along the direction parallel to the axis of the centrifugal barrel 11, the bottom end of the lifting rod 21 is rotatably provided with a limiting roller 22, the limiting roller 22 is horizontally arranged, the scraper 17 is provided with a sliding chute 23, and the limiting roller 22 is positioned in the sliding chute 23.

In this embodiment, an air cylinder is installed on the frame 1, the telescopic end of the air cylinder is connected with a lifting rod 21, the lifting rod 21 is used for controlling the sliding of the sliding plate 16, specifically, the bottom of the lifting rod 21 is rotatably provided with a limiting roller 22, the limiting roller 22 is horizontally arranged, the scraper 17 is provided with a chute 23, the limiting roller 22 is located in the chute 23, and after the lifting rod 21 lifts, the limiting roller 22 slides in the chute 23. When the lifting rod 21 descends, the scraper 17 is controlled to swing downwards, and the sliding plate 16 is controlled to descend after the scraper is abutted against the second limiting part 20 until the scraper is abutted against the blocking part 18; when the lifting rod 21 is lifted, the scraper 17 is controlled to swing upwards, and the sliding plate 16 is controlled to lift until the sliding plate protrudes out of the centrifugal barrel 11 after the sliding plate abuts against the first limiting part 19, so that cleaning is realized.

Further, the method also comprises the steps of,

the flushing device 2 comprises a vibrating plate 24, a vibrating motor 25 and high-pressure spray heads 26, wherein the vibrating plate 24 is obliquely arranged on the frame 1, the vibrating motor 25 is arranged on the vibrating plate 24, the high-pressure spray heads 26 are multiple and are arranged on the frame 1, the high-pressure spray heads 26 are distributed along the direction parallel to the vibrating plate 24 and are positioned above the vibrating plate 24, and the vibrating plate 24 is provided with a plurality of water flowing holes 27.

In this embodiment, in order to remove earth and dust in coal, be provided with washing unit 2, drive vibrating plate 24 vibration through vibrating motor 25 to set up vibrating plate 24 slope, realize the transportation of coal, in the transportation process, a plurality of high-pressure shower nozzles 26 of top wash coal, make earth and dust break away from coal, and the sewage after washing then flows down through the flow hole 27 on the vibrating plate 24, thereby improves the quality of coal products, also reduces the raise dust when smashing the follow-up.

Further, the method also comprises the steps of,

the device also comprises a water circulation system, wherein the water circulation system comprises a water tank 28, a filtering unit 29 and a water storage tank 30 which are sequentially connected, the top of the water tank 28 is open and is positioned below the vibrating plate 24, and the water storage tank 30 is connected with the high-pressure spray head 26.

In this embodiment, a water tank 28 is disposed below the vibration plate 24, and is used for collecting the sewage after flushing, filtering by a filtering unit 29, and then draining the sewage back to the water storage tank 30, so as to realize water circulation and ensure the stability of water supply.

Further, the method also comprises the steps of,

the vibrating plate 24 is internally provided with a prefabricated water channel 31, the prefabricated water channel 31 is positioned at the front end of the vibrating plate 24, one end of the prefabricated water channel 31 is connected with the water storage tank 30, and the other end of the prefabricated water channel is open and is tightly attached to the surface of the vibrating plate 24.

In this embodiment, a prefabricated water channel 31 is further formed in the vibrating plate 24, the prefabricated water channel 31 is located at the front end of the vibrating plate 24, an outlet of the prefabricated water channel 31 is close to the surface of the vibrating plate 24 and parallel to the surface of the vibrating plate 24, so that water flows to the bottom of coal for bottom flushing, the upper high-pressure spray head 26 performs top flushing, and the vibrating plate 24 is matched for vibration, so that coal is continuously rolled, multi-azimuth full flushing is achieved, and flushing effect is improved.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims

1. The utility model provides a coal reducing mechanism, includes frame (1) and locates in proper order washing unit (2), conveyor (3), hopper (4) and reducing mechanism (5) on frame (1), a serial communication port, the inner wall of hopper (4) exit end becomes semi-circular, add anti-blocking mechanism in hopper (4), anti-blocking mechanism includes pivot (6) and baffle (7), pivot (6) are located around hopper (4) axis rotation in hopper (4), baffle (7) are a plurality of, evenly locate on pivot (6) excircle, baffle (7) outer tip laminating hopper (4) semicircular inner wall, the distance between two adjacent baffle (7) ends is greater than the exit width of hopper (4).

2. A coal pulverizing apparatus as defined in claim 1, wherein the hopper (4) is located above the inlet of the pulverizing apparatus (5), a feed channel (8) is provided between the outlet of the hopper (4) and the inlet of the pulverizing apparatus (5), the feed channel (8) comprises a plurality of swinging plates (9), one end of the swinging plates (9) is hinged to the inlet of the pulverizing apparatus (5), and the other end is abutted to the outer wall of the hopper (4).

3. The coal crushing device according to claim 2, characterized in that a centrifugal mechanism (10) is arranged below an outlet of the crushing device (5), the centrifugal mechanism (10) comprises a centrifugal cylinder (11) and a rotary table (12), the centrifugal cylinder (11) is arranged on the frame (1), the rotary table (12) and the centrifugal cylinder (11) are coaxially arranged and rotationally arranged in the centrifugal cylinder (11), an annular blanking port (13) is formed between the outer edge of the rotary table (12) and the inner wall of the centrifugal cylinder (11), a plurality of rings of baffle rings (14) are distributed on the rotary table (12) along the radial direction, the baffle rings (14) are intermittently arranged, and the inner side of the baffle rings (14) is an inclined plane.

4. A coal pulverizing apparatus as defined in claim 3, wherein the inner wall of the centrifuge bowl (11) has a magnetic layer (15), the magnetic layer (15) being located at the same level as the turntable (12) for adsorbing ferrous and magnetic materials.

5. The coal crushing device according to claim 4, wherein the section of the centrifugal barrel (11) is polygonal, a cleaning assembly is slidably arranged on the inner wall of the centrifugal barrel (11) along the axis parallel direction, and a spiral slideway (32) is arranged on the outer wall of the centrifugal barrel (11) and used for collecting materials scraped by the cleaning assembly.

6. The coal crushing device according to claim 5, wherein the cleaning assembly comprises a sliding plate (16) and a scraping plate (17), the sliding plate (16) is slidably arranged on the inner wall of the centrifugal cylinder (11) along the axis parallel direction, the inner wall of the centrifugal cylinder (11) is provided with a blocking part (18) for limiting the lowest position of the sliding plate (16), the scraping plate (17) is arranged on the sliding plate (16) in a swinging mode, and the sliding plate (16) is provided with a first limiting part (19) and a second limiting part (20) for respectively positioning the upper limit position and the lower limit position of the swinging of the scraping plate (17).

7. The coal crushing device according to claim 6, wherein a lifting rod (21) is slidably arranged on the frame (1) along a direction parallel to the axis of the centrifugal cylinder (11), a limit roller (22) is rotatably arranged at the bottom end of the lifting rod (21), the limit roller (22) is horizontally arranged, a chute (23) is formed in the scraper (17), and the limit roller (22) is located in the chute (23).

8. The coal pulverizing device according to claim 1, wherein the flushing device (2) comprises a vibrating plate (24), a vibrating motor (25) and high-pressure spray nozzles (26), the vibrating plate (24) is obliquely arranged on the frame (1), the vibrating motor (25) is arranged on the vibrating plate (24), the high-pressure spray nozzles (26) are multiple and are arranged on the frame (1), and the high-pressure spray nozzles (26) are distributed along a direction parallel to the vibrating plate (24) and are located above the vibrating plate (24), and the vibrating plate (24) is provided with a plurality of water flow holes (27).

9. The coal pulverizing device of claim 8 further comprising a water circulation system including a water tank (28), a filter unit (29) and a water reservoir (30) connected in sequence, the water tank (28) being open at the top and below the vibrating plate (24), the water reservoir (30) being connected to the high pressure jet (26).

10. The coal pulverizing device of claim 9 wherein the vibrating plate (24) has a preformed water channel (31) therein, the preformed water channel (31) being located at a front end of the vibrating plate (24), one end of the preformed water channel (31) being connected to the water reservoir (30), and the other end opening being in close proximity to a surface of the vibrating plate (24).