Multistage washing and screening device for coal treatment

Abstract

Disclosed in the present invention is a multistage washing and screening device for coal treatment in the field of coal treatment. The multistage washing and screening device comprises a bottom plate,

Description

The present invention relates to the field of coal treatment, and particularly to a multi-stage washing device for coal treatment. BACKGROUND As a main energy source, coal plays an important role in the economic development and national security in China, and the coal mining and consumption in China for many consecutive years ranks first in the world. In recent years, with the continuous increase of coal mining depth, a proportion of slack coal (with a particle size smaller than 13 mm) in raw coal has been increasing. At present, device commonly used for classification and separation of the slack coal comprise a hydraulic classification cyclone, a three-product cyclone classification screen, a vibrating screen, a spiral separator, a teetered bed separator, a heavy medium cyclone, and the like. Despite many years of unremitting efforts, extended coal preparation technologies around these devices have been rapidly developed and widely used, typically comprising a coarse coal slime classification technology or a coarse slime separation technology. Most of existing multi-stage washing devices can only screen coal mines and gangue, gangue-containing coal mines are not easy to be selected out, and a heavy suspension in a heavy medium separator is difficult to be reused, which is easy to cause waste. Moreover, the coal mines containing the heavy suspension are easy to adhere to a machine during conveying to cause machine damage. Therefore, we propose a multi-stage washing device for coal treatment to solve the above problem. SUMMARY The present invention aims to provide a multi-stage washing device for coal treatment, so as to solve the above problem raised in the background. In order to solve the above technical problem, the following technical solution is used in the present invention. A multi-stage washing device for coal treatment comprises a bottom plate , wherein a fixedly connected first mounting plate and a fixedly connected first mounting frame are arranged on the bottom plate, a fixedly connected second mounting plate and a fixedly connected third mounting plate are arranged at one end of the bottom plate, a fixedly connected fourth mounting plate is arranged on one side of the second mounting plate, a box body is further arranged on the bottom plate, a fixedly 14 1024 connected heavy medium separator is arranged above the box body, the heavy medium separator comprises a shell, a filter in sliding fit with the box body is further arranged in the box body, the filter comprises a filter body, a hole is formed in the filter body, and a fixedly connected rack is arranged on one side of the filter body; and a first conveying device is arranged below the filter, the first conveying device comprises a first conveying belt, a fixedly connected third motor is arranged on the fourth mounting plate, a fixedly connected third gear is arranged at an output end of the third motor, the third gear is meshed with a second gear, a meshed fourth gear is arranged on one side of the third gear, a fixedly connected hammering device is arranged at one end of the fourth gear, a fixedly connected fifth gear is arranged at one end of the hammering device, a meshed chain is arranged on an outer side of the fifth gear, and the chain is connected with a six gear. Preferably, a first opening, a second opening and a third opening are formed in the first mounting plate, a fourth opening is formed in the second mounting plate, a fifth opening is formed in the fourth mounting plate, a sixth opening and a seventh opening are formed in the third mounting plate, a fixedly connected first limiting plate is further arranged on the third mounting plate, a fifth mounting plate is arranged at one end of the first limiting plate, a eighth opening is formed in the fifth mounting plate, a six mounting plate is arranged on one side of the fifth mounting plate, an ninth opening and a tenth opening are formed in the sixth mounting plate, a eleventh opening and an twelfth opening are formed in the first mounting frame, a fixedly connected seventh mounting plate and a fixedly connected eighth mounting plate are arranged on one side of the bottom plate, a thirteenth opening and a fourteenth opening are formed in the seventh mounting plate, a fifteenth opening and a sixteenth opening are formed in the eighth mounting plate, a ninth mounting plate and a tenth mounting plate are arranged on one side of the eighth mounting plate, a fixedly connected drainage plate is arranged between the seventh mounting plate and the eighth mounting plate, and fixedly connected water retaining strips are arranged at both ends of the drainage plate. Preferably, bottom columns distributed in an array are arranged below the box body, the bottom columns are fixedly connected with the box body, a second slot is arranged at one end of the box body, a third slot is arranged in the box body, a first slot is arranged in the shell, a fixedly connected filter screen is arranged in the first slot, a first door in rotational fit with the shell and a fixedly connected first water pipe are arranged on one side of the shell, a water inlet is arranged at one end of the first water pipe, a fixedly connected first handle is arranged on the first door, a fixedly connected first suction pump is arranged on the first water pipe, a fixedly connected eleventh mounting plate is arranged at one end of the shell, and a fixedly connected first motor is arranged on 14 1024 the eleventh mounting plate. Preferably, a fixedly connected spiral belt is arranged on an output shaft of the first motor, a fixedly connected second water pipe is arranged on one side of the box body, a fixedly connected second suction pump is arranged on the second water pipe, the water pipe at the other end of the suction pump is connected with the first water pipe, a fixedly connected twelfth mounting plate is arranged on the other side of the box body, a fixedly connected second motor is arranged on the twelfth mounting plate, a fixedly connected first gear is arranged at an output end of the second motor, a shell cover in rotational fit with the shell is arranged on the shell, and a second handle is arranged at one end of the shell cover. Preferably, the rack is meshed with the first gear, a fixedly connected first lead screw motor is arranged at one end of the filter body, the first lead screw motor is connected with a first lead screw, a first bearing seat in rotational fit with the first lead screw is arranged at one end of the first lead screw, a first lead screw slider in threaded fit with the first lead screw is arranged on the first lead screw, and a fixedly connected first pushing bar is arranged at one end of the first lead screw slider. Preferably, a first roller and a second roller are arranged in the first conveying belt, a fixedly connected second gear is arranged on one side of the first roller, the sixth gear is meshed with the chain, a fixedly connected impurity remover is arranged at one end of the sixth gear, a second lead screw motor is arranged below the first conveying device, the second lead screw motor is fixedly connected with the fifth mounting plate, a fixedly connected second lead screw is arranged at one end of the second lead screw motor, a second lead screw slider in threaded fit with the second lead screw is arranged on the second lead screw, and a fixedly connected second pushing bar is arranged at one end of the second lead screw slider. Preferably, a fixedly connected sliding groove is arranged outside the second slot, a second conveying device is arranged at the other end of the sliding groove, the second conveying device comprises a second conveying belt, a third roller and a fourth roller are arranged in the second conveying belt, a fixedly connected fourth motor is arranged on the ninth mounting plate, an output end of the fourth motor is fixedly connected with one end of the third roller, and two ends of the fourth roller are in sliding fit with the tenth opening and the thirteenth opening. Preferably, a third conveying device is arranged below the first conveying device, the third conveying device comprises a third conveying belt, a fifth roller and a sixth roller are arranged in the third conveying belt, a fixedly connected fifth motor is arranged on the tenth mounting plate, an output end of the fifth motor is fixedly connected with the fifth roller, and two ends of the sixth roller are rotatably connected with the seventeenth opening and the first opening. 14 1024 Preferably, a collecting box is arranged at one end of the third conveying device, a fourth slot and a fifth slot are arranged at one end of the collecting box, a second door in rotational fit with the collecting box and a third door in rotational fit with the collecting box are arranged at the other end of the collecting box, a fixedly connected third handle is arranged on the second door, and a fixedly connected fourth handle is arranged on the third door. Compared with the prior art, the present invention has the beneficial effects as follows: 1. in the present invention, the heavy suspension can be directly recycled, the efficiency is high, a coal mine and a gangue-containing coal mine are easily separated, and when the washed coal mine is conveyed, the hammering device and a scraping plate on the machine can scrape off the coal mine adhering to the conveying belt for treatment, so that the service life of the machine is prolonged. BRIEF DESCRIPTION OF THE DRAWINGS In order to illustrate technical solutions in embodiments of the present invention or in the prior art more clearly, the drawings used in the description of the embodiments or the prior art will be briefly described below. Obviously, the drawings in the following description are merely some embodiments of the present invention. For those of ordinary skills in the art, other drawings may also be obtained based on these drawings without going through any creative work. FIG. lisa schematic structural diagram of a multi-stage washing device according to the present invention; FIG. 2 is a schematic structural diagram of the multi-stage washing device according to the present invention; FIG. 3 is a schematic structural diagram of a part of the multi-stage washing device according to the present invention; FIG. 4 is a schematic structural diagram of a part of the multi-stage washing device according to the present invention; FIG. 5 is a schematic structural diagram of a part of the multi-stage washing device according to the present invention; FIG. 6 is a schematic structural diagram of a filter in the present invention; FIG. 7 is a schematic structural diagram of a first conveying device in the present invention; FIG. 8 is a schematic structural diagram of a part of the multi-stage washing device according to the present invention; FIG. 9 is a schematic structural diagram of a part of the multi-stage washing device according to the present invention; 14 1024 FIG. 10 is a schematic structural diagram of a part of the multi-stage washing device according to the present invention; and FIG. 11 is a schematic structural diagram of a collecting box in the present invention. DETAILED DESCRIPTION Technical solutions in embodiments of the present invention will be clearly and completely described hereinafter with reference to the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some but not all of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skills in the art without going through any creative work should fall within the scope of protection of the present invention. In the description of the present invention, it should be understood that, the orientation or position relationship indicated by the terms “trepanning”, “up”, “down”, “thickness”, "top", “middle”, "length", "inside", "around", and the like is only for the convenience of description of the present invention and simplification of the description, and it is not to indicate or imply that the indicated assembly or element must have a specific orientation, and be constructed and operated in a specific orientation. Therefore, the terms should not be understood as limiting the present invention. With reference to FIG. 1 to FIG. 11, a multi-stage washing device for coal treatment comprises a bottom plate 1, wherein a fixedly connected first mounting plate 11 and a fixedly connected first mounting frame 18 are arranged on the bottom plate 1, a first opening 111, a second opening 112 and a third opening 113 are formed in the first mounting plate 11, a fixedly connected second mounting plate 12 and a fixedly connected third mounting plate 13 are arranged at one end of the bottom plate 1, a fourth opening 121 is formed in the second mounting plate 12, a fixedly connected fourth mounting plate 122 is arranged on one side of the second mounting plate (12), a fifth opening 1221 is formed in the fourth mounting plate 122, a sixth opening 131 and a seventh opening 132 are formed in the third mounting plate 13, a fixedly connected first limiting plate 14 is further arranged on the third mounting plate 13, a fifth mounting plate 133 is arranged at one end of the first limiting plate 14, a eighth opening is formed in the fifth mounting plate 133, a six mounting plate 16 is arranged on one side of the fifth mounting plate 133, an ninth opening 161 and a tenth opening 162 are formed in the sixth mounting plate 16, a eleventh opening 181 and an twelfth opening 182 are formed in the first mounting frame 18, a fixedly connected seventh mounting plate 17 and a fixedly connected eighth mounting plate 19 are arranged on one side of the bottom plate 1, a thirteenth opening and a fourteenth opening are formed in the seventh mounting plate 17, a fifteenth opening 191 and a 14 1024 sixteenth opening 192 are formed in the eighth mounting plate 19, a ninth mounting plate 193 and a tenth mounting plate are arranged on one side of the eighth mounting plate 19, a fixedly connected drainage plate 101 is arranged between the seventh mounting plate 17 and the eighth mounting plate 19, and fixedly connected water retaining strips 1011 are arranged at both ends of the drainage plate 101. A box body 2 is further arranged on the bottom plate 1, bottom columns 21 distributed in an array are arranged below the box body 2, the bottom columns 21 are fixedly connected with the box body 2, a second slot 211 is arranged at one end of the box body 2, a third slot 28 is arranged in the box body 2, a fixedly connected heavy medium separator 23 is arranged above the box body 2, the heavy medium separator 23 comprises a shell 24, a first slot 241 is arranged in the shell 24, a fixedly connected filter screen 246 is arranged in the first slot 241, a first door 242 in rotational fit with the shell and a fixedly connected first water pipe 243 are arranged on one side of the shell 24, a water inlet 245 is arranged at one end of the first water pipe 243, a fixedly connected first handle 2421 is arranged on the first door 242, a fixedly connected first suction pump 244 is arranged on the first water pipe 243, a fixedly connected eleventh mounting plate 252 is arranged at one end of the shell (24), a fixedly connected first motor 25 is arranged on the eleventh mounting plate 252, a fixedly connected spiral belt 251 is arranged on an output shaft of the first motor 25, a fixedly connected second water pipe 26 is arranged on one side of the box body 2, a fixedly connected second suction pump 261 is arranged on the second water pipe 26, the water pipe at the other end of the suction pump 261 is connected with the first water pipe 243, a fixedly connected twelfth mounting plate 271 is arranged on the other side of the box body 2, a fixedly connected second motor 27 is arranged on the twelfth mounting plate 271, a fixedly connected first gear is arranged at an output end of the second motor 27, a shell cover 29 in rotational fit with the shell is arranged on the shell 24, and a second handle 291 is arranged at one end of the shell cover 29. A filter 3 in sliding fit with the box body is further arranged in the box body 2, the filter 3 comprises a filter body 31, a hole 311 is formed in the filter body 31, a fixedly connected rack 32 is arranged on one side of the filter body 31, the rack 32 is meshed with the first gear, a fixedly connected first lead screw motor 33 is arranged at one end of the filter body 31, the first lead screw motor 33 is connected with a first lead screw 331, a first bearing seat 332 in rotational fit with the first lead screw is arranged at one end of the first lead screw 331, a first lead screw slider 34 in threaded fit with the first lead screw is arranged on the first lead screw 331, and a fixedly connected first pushing bar 341 is arranged at one end of the first lead screw slider 34. A first conveying device 5 is arranged below the filter 3, the first conveying device 5 comprises 14 1024 a first conveying belt 51, a first roller 52 and a second roller 521 are arranged in the first conveying belt 51, a fixedly connected second gear 522 is arranged on one side of the first roller 52, a fixedly connected third motor 53 is arranged on the fourth mounting plate 122, a fixedly connected third gear 531 is arranged at an output end of the third motor 53, the third gear 531 is meshed with a second gear 522, a meshed fourth gear 54 is arranged on one side of the third gear 531, a fixedly connected hammering device 541 is arranged at one end of the fourth gear 54, a fixedly connected fifth gear 55 is arranged at one end of the hammering device 541, a meshed chain 56 is arranged on an outer side of the fifth gear 55, the chain 56 is connected with a six gear 57, the sixth gear 57 is meshed with the chain 56, a fixedly connected impurity remover 571 is arranged at one end of the sixth gear 57, a second lead screw motor 58 is arranged below the first conveying device 5, the second lead screw motor 58 is fixedly connected with the fifth mounting plate 133, a fixedly connected second lead screw 581 is arranged at one end of the second lead screw motor 58, a second lead screw slider 59 in threaded fit with the second lead screw is arranged on the second lead screw 581, and a fixedly connected second pushing bar 591 is arranged at one end of the second lead screw slider 59. A fixedly connected sliding groove 4 is arranged outside the second slot 211, a second conveying device 6 is arranged at the other end of the sliding groove 4, the second conveying device 6 comprises a second conveying belt 63, the second conveying belt 63 is made of a hydrophobic material and may filter water in slags, water retaining strips are arranged on both sides of the second conveying belt 63, a third roller 61 and a fourth roller 611 are arranged in the second conveying belt 63, a fixedly connected fourth motor 62 is arranged on the ninth mounting plate 193, an output end of the fourth motor 62 is fixedly connected with one end of the third roller 61, and two ends of the fourth roller 611 are in sliding fit with the tenth opening 162 and the thirteenth opening. A third conveying device 7 is arranged below the first conveying device 5, the third conveying device 7 comprises a third conveying belt 71, a fifth roller 72 and a sixth roller 721 are arranged in the third conveying belt 71, a fixedly connected fifth motor 73 is arranged on the tenth mounting plate, an output end of the fifth motor 73 is fixedly connected with the fifth roller 72, and two ends of the sixth roller 721 are rotatably connected with the seventeenth opening 123 and the first opening 111. A collecting box 8 is arranged at one end of the third conveying device 7, a fourth slot 81 and a fifth slot 82 are arranged at one end of the collecting box 8, a second door 83 in rotational fit with the collecting box and a third door 84 in rotational fit with the collecting box are arranged at the other end of the collecting box 8, a fixedly connected third handle is arranged on the second door 83, and a fixedly connected fourth handle is arranged on the third door 84. 14 1024 Working principle: A slack coal mine is poured into the first slot 241 first, and then a heavy suspension is injected from the water inlet 245. At this time, heavy gangue in the coal mine sinks onto the filter screen 246, and the remaining heavy suspension part returns to the water inlet 245 from the first water pipe 243 for continuous recycling. A coal mine containing a small amount of gangue is suspended in the heavy suspension, and the coal mine floats on the heavy suspension. At this time, the first motor 25 starts up, the spiral belt 251 starts to rotate, the coal mine containing the small amount of gangue and the coal mine are conveyed forward, and the coal mine containing the small amount of gangue falls onto the filter 3 in the box body 2 from the third slot 28. At this time, the heavy suspension doped in the coal mine passes through the first screw rod 331 and flows to a bottom portion of the box body 2, and then starts to be recycled through the second water pipe 26 and the second suction pump 261. In the case of excessive accumulation of the coal mine containing the small amount of gangue on the filter 3, the second motor 27 starts up to drive the first gear to start and drive the rack 32 to slide outwardly, and then the first lead screw motor 33 starts up to drive the first lead screw slider 34 to move and then push the coal mine containing the small amount of gangue on the filter body 31 onto the first conveying belt 51. At this time, the third motor 53 starts up to drive the third gear 531 to move and then be meshed with the second gear 522 and the fourth gear 54. At this time, the hammering device 541 starts to hammer the first conveying belt 51, so as to prevent the coal mine containing the small amount of gangue from adhering to the first conveying belt 51. At this time, the fifth gear 55 drives the chain 56 to move, the chain 56 drives the impurity remover 571 to scrape off the coal mine on the first conveying belt 51, and then the second lead screw motor 58 starts up to drive the second pushing bar 591 to push away the coal mine containing the small amount of gangue on the bottom plate 1, wherein the coal mine flows onto the second conveying device 6 through the sliding groove 4. At this time, the heavy suspension in the coal mine passes through the second conveying belt 63 and flows onto the drainage plate 101, and then flows into a storage barrel from the drainage plate 101. Subsequently, the coal mine containing the small amount of gangue and the coal mine enter the collecting box 8, and washing is completed at this time. In the descriptions of the specification, the descriptions with reference to the terms "one embodiment", "example", "specific example", etc., refer to that specific features, structures characteristics described with reference to the embodiments or examples are included in at least one embodiment or example of the present invention. In the specification, the schematic representation of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. The above show and describe the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, the descriptions in the above embodiments and the specification only illustrate the principles of the present invention, the present invention may have various changes and improvements without departing from the scope of the present invention, and the changes and improvements fall within the scope sought to be protected by the present invention as defined in the appended Claims. 14 1024

Claims

14 10241. A multi-stage washing device for coal treatment, comprising a bottom plate (1), wherein a fixedly connected first mounting plate (11) and a fixedly connected first mounting frame (18) are arranged on the bottom plate (1), a fixedly connected second mounting plate (12) and a fixedly connected third mounting plate (13) are arranged at one end of the bottom plate (1), a fixedly connected fourth mounting plate (122) is arranged on one side of the second mounting plate (12), a box body (2) is further arranged on the bottom plate (1), a fixedly connected heavy medium separator (23) is arranged above the box body (2), the heavy medium separator (23) comprises a shell (24), a filter (3) in sliding fit with the box body is further arranged in the box body (2), the filter (3) comprises a filter body (31), a hole (311) is formed in the filter body (31), and a fixedly connected rack (32) is arranged on one side of the filter body (31); andWherein the multi-stage washing device comprises a fixedly connected first motor (25); a fixedly connected second motor (27); and a fixedly connected third motor (53); and a fixedly connected first gear is arranged at an output end of the second motor (27);a first conveying device (5) is arranged below the filter (3), the first conveying device (5) comprises a first conveying belt (51), the fixedly connected third motor (53) is arranged on the fourth mounting plate (122), a fixedly connected third gear (531) is arranged at an output end of the third motor (53), the third gear (531) is meshed with a second gear (522), a meshed fourth gear (54) is arranged on one side of the third gear (531), a fixedly connected hammering device (541) is arranged at one end of the fourth gear (54), a fixedly connected fifth gear (55) is arranged at one end of the hammering device (541), a meshed chain (56) is arranged on an outer side of the fifth gear (55), and the chain (56) is connected with a six gear (57); andwherein a first opening (111), a second opening (112) and a third opening (113) are formed in the first mounting plate (11), a fourth opening (121) is formed in the second mounting plate (12), a fifth opening (1221) is formed in the fourth mounting plate (122), a sixth opening (131) and a seventh opening (132) are formed in the third mounting plate (13), a fixedly connected first limiting plate (14) is further arranged on the third mounting plate (13), a fifth mounting plate (133) is arranged at one end of the first limiting plate (14), a eighth opening is formed in the fifth mounting plate (133), a six mounting plate (16) is arranged on one side of the fifth mounting plate (133), an ninth opening (161) and a tenth opening (162) are formed in the sixth mounting plate (16), a eleventh opening (181) and an twelfth opening (182) are formed in the first mounting frame (18), a fixedly connected seventh mounting plate (17) and a fixedly connected eighth mounting plate (19) are arranged on one side of14 1024the bottom plate (1), a thirteenth opening and a fourteenth opening are formed in the seventh mounting plate (17), a fifteenth opening (191) and a sixteenth opening (192) are formed in the eighth mounting plate (19), a ninth mounting plate (193) and a tenth mounting plate are arranged on one side of the eighth mounting plate (19), a fixedly connected drainage plate (101) is arranged between the seventh mounting plate (17) and the eighth mounting plate (19), and fixedly connected water retaining strips (1011) are arranged at both ends of the drainage plate (101); andwherein bottom columns (21) distributed in an array are arranged below the box body (2), the bottom columns (21) are fixedly connected with the box body (2), a second slot (211) is arranged at one end of the box body (2), a third slot (28) is arranged in the box body (2), a first slot (241) is arranged in the shell (24), a fixedly connected filter screen (246) is arranged in the first slot (241), a first door (242) in rotational fit with the shell and a fixedly connected first water pipe (243) are arranged on one side of the shell (24), a water inlet (245) is arranged at one end of the first water pipe (243), a fixedly connected first handle (2421) is arranged on the first door (242), a fixedly connected first suction pump (244) is arranged on the first water pipe (243), a fixedly connected eleventh mounting plate (252) is arranged at one end of the shell (24), and the fixedly connected first motor (25) is arranged on the eleventh mounting plate (252); andwherein a fixedly connected spiral belt (251) is arranged on an output shaft of the first motor (25), a fixedly connected second water pipe (26) is arranged on one side of the box body (2), a fixedly connected second suction pump (261) is arranged on the second water pipe (26), the water pipe at the other end of the suction pump (261) is connected with the first water pipe (243), a fixedly connected twelfth mounting plate (271) is arranged on the other side of the box body (2), the fixedly connected second motor (27) is arranged on the twelfth mounting plate (271), the fixedly connected first gear is arranged at the output end of the second motor (27), a shell cover (29) in rotational fit with the shell is arranged on the shell (24), and a second handle (291) is arranged at one end of the shell cover (29).

2. The multi-stage washing device for coal treatment according to claim 1, wherein the rack (32) is meshed with the first gear, a fixedly connected first lead screw motor (33) is arranged at one end of the filter body (31), the first lead screw motor (33) is connected with a first lead screw (331), a first bearing seat (332) in rotational fit with the first lead screw is arranged at one end of the first lead screw (331), a first lead screw slider (34) in threaded fit with the first lead screw is arranged on the first lead screw(331), and a fixedly connected first pushing bar (341) is arranged at one end of the first lead screw slider (34).

3. The multi-stage washing device for coal treatment according to claim 2, wherein a first roller (52) and a second roller (521) are arranged in the first conveying belt (51), a fixedly connected second14 1024gear (522) is arranged on one side of the first roller (52), the sixth gear (57) is meshed with the chain (56), a fixedly connected impurity remover (571) is arranged at one end of the sixth gear (57), a second lead screw motor (58) is arranged below the first conveying device (5), the second lead screw motor (58) is fixedly connected with the fifth mounting plate (133), a fixedly connected second lead screw (581) is arranged at one end of the second lead screw motor (58), a second lead screw slider (59) in threaded fit with the second lead screw is arranged on the second lead screw (581), and a fixedly connected second pushing bar (591) is arranged at one end of the second lead screw slider (59).

4. The multi-stage washing device for coal treatment according to claim 3, wherein a fixedly connected sliding groove (4) is arranged outside the second slot (211), a second conveying device (6) is arranged at the other end of the sliding groove (4), the second conveying device (6) comprises a second conveying belt (63), a third roller (61) and a fourth roller (611) are arranged in the second conveying belt (63), a fixedly connected fourth motor (62) is arranged on the ninth mounting plate (193), an output end of the fourth motor (62) is fixedly connected with one end of the third roller (61), and two ends of the fourth roller (611) are in sliding fit with the tenth opening (162) and the thirteenth opening.

5. The multi-stage washing device for coal treatment according to claim 4, wherein a third conveying device (7) is arranged below the first conveying device (5), the third conveying device (7) comprises a third conveying belt (71), a fifth roller (72) and a sixth roller (721) are arranged in the third conveying belt (71), a fixedly connected fifth motor (73) is arranged on the tenth mounting plate, an output end of the fifth motor (73) is fixedly connected with the fifth roller (72), and two ends of the sixth roller (721) are rotatably connected with the seventeenth opening (123) and the first opening (111).

6. The multi-stage washing device for coal treatment according to claim 5, wherein a collecting box (8) is arranged at one end of the third conveying device (7), a fourth slot (81) and a fifth slot (82) are arranged at one end of the collecting box (8), a second door (83) in rotational fit with the collecting box and a third door (84) in rotational fit with the collecting box are arranged at the other end of the collecting box (8), a fixedly connected third handle is arranged on the second door (83), and a fixedly connected fourth handle is arranged on the third door (84).

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