CN115364936A

CN115364936A - Coal briquette crushing and screening machine for coal dressing

Info

Publication number: CN115364936A
Application number: CN202211014976.5A
Authority: CN
Inventors: 潘金茹; 安尧; 毛艳宇; 李红斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-08-23
Filing date: 2022-08-23
Publication date: 2022-11-22

Abstract

The invention relates to the technical field of coal briquette crushing and screening, in particular to a coal briquette crushing and screening machine for coal preparation, which comprises a crushing box and a support frame, wherein the side wall of the crushing box is rotatably connected with a first support shaft and a second support shaft, the first support shaft and the second support shaft are respectively provided with a crushing roller which are matched with each other, and the outer side of the crushing box is provided with a distance adjusting mechanism which is matched with the first support shaft. According to the invention, the distance between the two crushing rollers is adjusted through the distance adjusting mechanism, in the adjusting process, the gear is always meshed with the teeth on the first disc and the second disc, the gear is driven to rotate through the first driving motor, so that the first disc and the second disc synchronously rotate, and the rotating directions of the first disc and the second disc are opposite, so that the two crushing rollers synchronously rotate all the time and the rotating directions are opposite, and on the premise of ensuring that the two crushing rollers synchronously rotate, the distance between the two crushing rollers can be adjusted within a certain range.

Description

Coal briquette crushing and screening machine for coal dressing

Technical Field

The invention relates to the technical field of coal briquette crushing and screening, in particular to a coal briquette crushing and screening machine for coal dressing.

Background

Coal dressing is a processing process of removing non-coal substances in raw coal by utilizing the difference of the density or surface characteristics of coal and other mineral substances, and dividing the raw coal into products with different qualities and specifications according to the granularity of the coal. Coal dressing can improve coal quality, reduce smoke and dust amount of coal combustion, and is beneficial to environmental protection. The coal dressing is generally that the raw coal is graded and screened firstly, and then non-coal substances in the raw coal are removed by methods such as gravity coal dressing or floating coal dressing, and the high-efficiency grading and screening has important significance in the aspects of energy conservation, environmental protection and improvement of coal economic benefit.

Coal occupies an irreplaceable position in both life and industrial production, but the coal just mined from a mine is large, the large coal needs to be crushed, and the crushed coal needs to be classified according to size for life or industrial production. The coal blocks crushed by the coal crushing device in the prior art are generally in a specification and cannot be adjusted, so that the crushed coal blocks need to be further crushed according to the use condition in subsequent use.

Disclosure of Invention

The invention aims to: in order to solve the problems, a coal block crushing and screening machine for coal dressing is provided.

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

a coal briquette crushing and screening machine for coal dressing comprises a crushing box and a support frame, wherein the side wall of the crushing box is rotatably connected with a first support shaft and a second support shaft, the first support shaft and the second support shaft are respectively provided with a crushing roller which is matched with each other, one end of each of the first support shaft and the second support shaft extends to the outside of the crushing box and is respectively and fixedly connected with a first disc and a second disc, the outer side wall of the crushing box is provided with a support, the support is rotatably connected with a gear, the end surfaces of the first disc and the second disc are respectively and fixedly connected with teeth which are meshed with the gear, the support is provided with a support table, the support table is provided with a first driving motor, the output end of the first driving motor is coaxially and fixedly connected with the gear, the outer side of the crushing box is provided with a distance adjusting mechanism matched with the first support shaft, one side of the crushing box is provided with a channel, conveying equipment is arranged below the crushing roller, the tail end of the conveying equipment penetrates through the channel and extends to the outside of the crushing box, and the inner side of the support frame is provided with a screening part matched with the conveying equipment;

the distance adjusting mechanism comprises first through grooves formed in the surface walls of two sides of the crushing box, the first supporting shaft is connected with the first through grooves in a sliding mode, a bottom plate is arranged on the crushing box, a hydraulic rod is arranged on the bottom plate, the output end of the hydraulic rod is fixedly connected with a lantern ring, and the lantern ring is sleeved on the first supporting shaft;

screening portion is including setting up the fixed station in the support frame inboard, fixed station top-down is equipped with first screen cloth, second screen cloth and collecting board in proper order, first screen cloth is hung through connecting the rope and is established on the support frame, be equipped with vibration mechanism in order to drive first screen cloth, second screen cloth and collecting board vibration on the fixed station.

Preferably, vibration mechanism is including seting up in the inboard spout of fixed station, sliding connection has the backup pad in the spout, be equipped with second driving motor in the backup pad, be equipped with two flexible subassemblies on the fixed station, flexible subassembly includes that the second leads to groove, third and leads to groove, telescopic link, slider and spring, it leads to the groove to have seted up the second on the fixed station, the inslot portion of second leads to the slider, all be equipped with the telescopic link between the inside wall of slider both sides and second through groove both sides, the telescopic link both ends respectively with slider and second through groove inside wall fixed connection, the cover is equipped with the spring on the telescopic link, the both ends of spring respectively with slider and second through groove inside wall butt, set up the third that intercommunication fixed station up end and second lead to the groove on the fixed station and lead to the groove, it has the connecting axle to run through on the slider on one of them flexible subassembly, slider upper end fixedly connected with the first link, connecting axle one end is kept away from the one end rotation and is connected with the pivot, the second link is connected with the second link and the second through the second link and the last end fixedly connected with the slider of connecting link.

Preferably, a collecting box is arranged on one side, away from the conveying equipment, of the collecting plate, a negative pressure fan is arranged in the collecting box, and a through hole is formed in the upper end of the collecting box.

Preferably, the through holes are provided in a plurality, and the through holes are distributed in a rectangular array.

Preferably, the first screen, the second screen and the collecting plate are all arranged in an inclined manner, the upper end face of the collecting box is an inclined face matched with the collecting plate, and the inclined angles of the first screen, the second screen and the collecting plate are the same.

Preferably, the first screen has larger pore sizes than the second screen.

Preferably, a vertical plate is arranged on one side, away from the conveying device, of the fixed table, a first collecting frame, a second collecting frame and a third collecting frame are sequentially arranged on the vertical plate from top to bottom, the first collecting frame is matched with the first screen, the second collecting frame is matched with the second screen, and the third collecting frame is matched with the collecting plate.

Preferably, a shielding plate matched with the crushing roller is arranged in the crushing box above the crushing roller.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. this application is equipped with two crushing rollers and roll adjustment mechanism, adjust the interval between two crushing rollers through roll adjustment mechanism, and in the accommodation process, the gear remains the meshing with the tooth on first disc and the second disc all the time, drive gear through a driving motor and rotate, make first disc and the synchronous rotation of second disc, and the rotation opposite direction of first disc and second disc, thereby make two crushing rollers rotate and rotate opposite direction all the time in step, under the synchronous pivoted prerequisite of guaranteeing two crushing rollers, can adjust the interval of two crushing rollers wantonly in the certain extent, the application scope of crushing apparatus has been improved greatly when guaranteeing crushing effect.

2. This application is through being equipped with the screening part, sieve the coal cinder respectively through first screen cloth and second screen cloth, divide the coal cinder into three types according to size of a dimension, and collect respectively, be convenient for the use of follow-up coal cinder, simultaneously first screen cloth, second screen cloth and collecting board are all through second driving motor drive, and first screen cloth is connected through being connected the rope with the support frame, second screen cloth and collecting board are connected with corresponding slider through first connecting block and second connecting block respectively, the slider both ends all are equipped with spring and telescopic link, make first screen cloth, second screen cloth and collecting board all not with fixed station and support frame lug connection, first screen cloth has significantly reduced, the impact of second screen cloth and collecting board to fixed station and support frame when the vibration, the life of equipment has been prolonged.

3. This application is through being equipped with the collecting box, and the coal cinder on the collecting plate slides down to the collecting box top along with the vibration of collecting plate gradually, through the inside negative-pressure air fan of collecting box for the inside negative pressure that forms of collecting box, with the collecting box on less dust of size and piece through the through-hole inhale the collecting box in, and the coal cinder then continues to slide down to the third and collects in the frame, has further improved the screening effect of coal cinder.

Drawings

Figure 1 shows a schematic representation of the overall construction of a comminution and screening machine according to an embodiment of the invention;

FIG. 2 is a schematic diagram of a crushing box and a conveying device provided according to an embodiment of the invention;

FIG. 3 is a schematic diagram illustrating a pitch adjustment mechanism provided according to an embodiment of the present invention;

FIG. 4 shows an enlarged view of the structure of FIG. 3 at A in accordance with the present invention;

FIG. 5 is a schematic diagram of a screening section structure provided according to an embodiment of the invention;

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

figure 7 shows another angle schematic view of a screening section structure provided according to an embodiment of the present invention.

Illustration of the drawings:

1. a crushing box; 2. a first support shaft; 3. a second support shaft; 4. a crushing roller; 5. a first disc; 6. a second disc; 7. teeth; 8. a support; 9. a gear; 10. a support table; 11. a first drive motor; 12. a first through groove; 13. a collar; 14. a base plate; 15. a hydraulic lever; 16. a shielding plate; 17. a transfer device; 18. a channel; 19. a support frame; 20. connecting ropes; 21. a first screen; 22. a fixed table; 23. a second through groove; 24. a third through groove; 25. a telescopic rod; 26. a slider; 27. a spring; 28. a connecting shaft; 29. a first connecting arm; 30. a rotating shaft; 31. a second connecting arm; 32. a third connecting arm; 33. a first connection block; 34. a second connecting block; 35. a second screen; 36. a collection plate; 37. a chute; 38. a support plate; 39. a second drive motor; 40. a collection box; 41. a through hole; 42. a vertical plate; 43. a first collection frame; 44. a second collection frame; 45. and a third collection frame.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.

Referring to fig. 1-7, the present invention provides a technical solution:

a coal briquette crushing and screening machine for coal dressing comprises a crushing box 1 and a support frame 19, wherein the side wall of the crushing box 1 is rotatably connected with a first support shaft 2 and a second support shaft 3, the first support shaft 2 and the second support shaft 3 are respectively provided with a crushing roller 4 which is matched with each other, one end of each of the first support shaft 2 and the second support shaft 3 extends to the outside of the crushing box 1 and is respectively and fixedly connected with a first disc 5 and a second disc 6, the outer side wall of the crushing box 1 is provided with a support 8, the support 8 is rotatably connected with a gear 9, the end faces of the first disc 5 and the second disc 6 are respectively and fixedly connected with teeth 7 which are meshed with the gear 9, the support 8 is provided with a support table 10, the support table 10 is provided with a first driving motor 11, the output end of the first driving motor 11 is coaxially and fixedly connected with the gear 9, the outer side of the crushing box 1 is provided with a distance adjusting mechanism which is matched with the first support shaft 2, one side of the crushing box 1 is provided with a channel 18, a conveying device 17 is arranged below the crushing roller 4, the tail end of the conveying device 17 extends to the outside of the crushing box 1 through the channel 18, and the inner side of the support frame is provided with a screening part which is matched with a conveying device 17; the distance adjusting mechanism comprises first through grooves 12 formed in the surface walls of two sides of the crushing box 1, the first supporting shaft 2 is connected with the first through grooves 12 in a sliding mode, a bottom plate 14 is arranged on the crushing box 1, a hydraulic rod 15 is arranged on the bottom plate 14, the output end of the hydraulic rod 15 is fixedly connected with a lantern ring 13, and the lantern ring 13 is sleeved on the first supporting shaft 2; screening portion is including setting up the fixed station 22 in support frame 19 inboard, and fixed station 22 top-down is equipped with first screen cloth 21, second screen cloth 35 and collection board 36 in proper order, and first screen cloth 21 is hung through connecting rope 20 and is established on support frame 19, is equipped with vibration mechanism in order to drive first screen cloth 21, second screen cloth 35 and collection board 36 vibration on the fixed station 22. Adjust the interval between two crushing rollers 4 through roll adjustment mechanism, and in the accommodation process, gear 9 remains the meshing with tooth 7 on first disc 5 and the second disc 6 all the time, drive gear 9 through first driving motor 11 and rotate, make first disc 5 and the synchronous rotation of second disc 6, and the rotation opposite direction of first disc 5 and second disc 6, thereby make two crushing rollers 4 rotate and rotate opposite direction all the time in step, under the prerequisite of guaranteeing the synchronous pivoted of two crushing rollers 4, can adjust the interval of two crushing rollers 4 wantonly in the certain extent, the application scope of crushing apparatus has been improved greatly when guaranteeing crushing effect.

Specifically, as shown in fig. 1, 5, 6 and 7, the vibration mechanism includes a sliding slot 37 disposed inside the fixed platform 22, a supporting plate 38 is slidably connected in the sliding slot 37, a second driving motor 39 is disposed on the supporting plate 38, two telescopic assemblies are disposed on the fixed platform 22, each telescopic assembly includes a second through slot 23, a third through slot 24, a telescopic rod 25, a sliding block 26 and a spring 27, the fixed platform 22 is provided with the second through slot 23, a sliding block 26 is disposed inside the second through slot 23, telescopic rods 25 are disposed between two sides of the sliding block 26 and inner side walls of two sides of the second through slot 23, two ends of each telescopic rod 25 are respectively and fixedly connected with the sliding block 26 and the inner side walls of the second through slot 23, each telescopic rod 25 is sleeved with a spring 27, two ends of each spring 27 are respectively abutted against the inner side walls of the sliding block 26 and the second through slot 23, the fixed platform 22 is provided with the third through slot 24 communicating the upper end surface of the fixed platform 22 and the second through slot 23, a connecting shaft 28 penetrates through a sliding block 26 on one of the telescopic assemblies, a first connecting block 33 is fixedly connected to the upper end of the sliding block 26, one end of the connecting shaft 28 is fixedly connected with the output end of a second driving motor 39 in a coaxial mode, a first connecting arm 29 is fixedly connected to the other end of the connecting shaft, the end, far away from the connecting shaft 28, of the first connecting arm 29 is rotatably connected with a rotating shaft 30, a second connecting arm 31 and a third connecting arm 32 are rotatably connected to the rotating shaft 30, one end, far away from the rotating shaft 30, of the third connecting arm 32 is rotatably connected with the first screen 21, the upper end of the first connecting block 33 penetrates through a third through groove 24 and is fixedly connected with a collecting plate 36, a second connecting block 34 is fixedly connected to the upper end of the sliding block 26 on the other telescopic assembly, the upper end of the second connecting block 34 penetrates through the third through groove 24 and is fixedly connected with a second screen 35, and one end, far away from the rotating shaft 30, of the sliding block 26 and the second connecting arm 31 are rotatably connected. First screen cloth 21, second screen cloth 35 and collection board 36 all pass through the drive of second driving motor 39, and first screen cloth 21 is connected through being connected rope 20 with support frame 19, second screen cloth 35 and collection board 36 are connected with corresponding slider 26 through first connecting block 33 and second connecting block 34 respectively, slider 26 both ends all are equipped with spring 27 and telescopic link 25, make first screen cloth 21, second screen cloth 35 and collection board 36 all not with fixed station 22 and support frame 19 lug connection, the impact of greatly reduced first screen cloth 21, second screen cloth 35 and collection board 36 to fixed station 22 and support frame 19 when the vibration, the life of equipment has been prolonged.

Specifically, as shown in fig. 1 and 5, a collecting box 40 is disposed on one side of the collecting plate 36 away from the conveying device 17, a negative pressure fan is disposed in the collecting box 40, and a through hole 41 is disposed at an upper end of the collecting box 40. The through holes 41 are provided in a plurality, and the through holes 41 are distributed in a rectangular array. The coal briquette screening device is provided with the collecting box 40, coal briquettes on the collecting plate 36 slide to the position above the collecting box 40 gradually along with the vibration of the collecting plate 36, negative pressure is formed inside the collecting box 40 through the negative pressure fan inside the collecting box 40, dust and debris with small sizes on the collecting box 40 are sucked into the collecting box 40 through the through hole 41, and the coal briquette screening effect is improved.

Specifically, as shown in fig. 1, 5 and 7, the first screen 21, the second screen 35 and the collecting plate 36 are all obliquely arranged, the upper end surface of the collecting box 40 is an oblique surface matched with the collecting plate 36, and the oblique angles of the first screen 21, the second screen 35 and the collecting plate 36 are the same. The first screen 21 has larger apertures than the second screen 35. The side, far away from the conveying device 17, of the fixed platform 22 is provided with a vertical plate 42, the vertical plate 42 is sequentially provided with a first collecting frame 43, a second collecting frame 44 and a third collecting frame 45 from top to bottom, the first collecting frame 43 is matched with the first screen 21, the second collecting frame 44 is matched with the second screen 35, and the third collecting frame 45 is matched with the collecting plate 36. The coal briquettes are respectively screened through the first screen 21 and the second screen 35, the coal briquettes are divided into three types according to the size, and are respectively collected by the first collecting frame 43, the second collecting frame 44 and the third collecting frame 45, so that the coal briquettes can be conveniently used subsequently, meanwhile, the upper end faces of the first screen 21, the second screen 35, the collecting plate 36 and the collecting box 40 are all obliquely arranged, and when the first screen 21, the second screen 35 and the collecting plate 36 keep vibrating, the coal briquettes slowly slide downwards, and the coal briquettes with different sizes can be conveniently collected.

Specifically, as shown in fig. 1, 2 and 3, a shielding plate 16 is provided in the crushing box 1 above the crushing roller 4 to be engaged with the crushing roller 4. The baffle plate 16 is arranged, when coal blocks are added into the crushing box 1, the coal blocks are prevented from falling from a gap between the crushing rollers 4 and the inner side wall of the crushing box 1, the coal blocks are enabled to fall after being crushed between the two crushing rollers 4, and the crushing effect is improved.

In summary, in the coal lump crushing and screening machine for coal separation provided in this embodiment, when in use, according to the requirement of the coal lump crushing specification, the hydraulic rod 15 drives the collar 13 to move, and further drives the first support shaft 2 to move in the first through groove 12, so that the distance between the two crushing rollers 4 changes, after the distance between the two crushing rollers 4 is adjusted to a suitable distance, the coal lump to be crushed is added into the crushing box 1, the first drive motor 11 drives the gear 9 to rotate, the gear 9 rotates to drive the first disk 5 and the second disk 6 to rotate through the teeth 7, during the movement of the first support shaft 2, the first disk 5 moves along with the first disk 5, the teeth 7 on the first disk 5 are always engaged with the gear 9, and the rotation directions of the first disk 5 and the second disk 6 are opposite, i.e. the rotation directions of the two crushing rollers 4 are opposite, the coal lump is crushed, the coal lump falls onto the conveying device 17, the crushed coal lump is conveyed onto the first disk 21 through the conveying device 17, the second disk 5 and the second disk 6 are driven to rotate through the second connecting shaft 26, the reciprocating connecting arm 34 and the reciprocating connecting arm 34, the reciprocating connecting arm 34 is connected to the second connecting arm 34, and the reciprocating connecting arm 34, so that the reciprocating connecting arm 34 is connected to the reciprocating connecting arm 34, the collecting plate 36 is driven to vibrate by the first connecting block 33, the second driving motor 39 moves synchronously with the sliding block 26 connected with the first connecting block 33, the crushed coal is classified into three types according to the size of the crushed coal by the sieving of the first screen 21 and the second screen 35, the coal on the first screen 21 slides down into the first collecting frame 43 gradually along with the vibration of the first screen 21, the coal on the second screen 35 slides down into the second collecting frame 44 gradually along with the vibration of the second screen 35, the coal on the collecting plate 36 slides down above the collecting box 40 gradually along with the vibration of the collecting plate 36, negative pressure is formed inside the collecting box 40 by a negative pressure fan inside the collecting box 40, dust with smaller size on the collecting box 40 is sucked into the collecting box 40 through the through hole 41, and the coal slides down into the third collecting frame 45 continuously, so that the crushing and sieving of the coal are realized.

The previous description of the embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a coal cinder crushing and screening machine for coal dressing, is including smashing case (1) and support frame (19), its characterized in that, it is connected with first back shaft (2) and second back shaft (3) to smash case (1) lateral wall rotation, all be equipped with crushing roller (4) of mutually supporting on first back shaft (2) and second back shaft (3), first back shaft (2) and second back shaft (3) one end all extend to smash case (1) outside and first disc (5) of fixedly connected with and second disc (6) respectively, be equipped with support (8) on crushing case (1) lateral wall, it is connected with gear (9) to rotate on support (8), equal fixedly connected with tooth (7) of being connected with gear (9) meshing on first disc (5) and second disc (6) terminal surface, be equipped with brace table (10) on support table (8), be equipped with first driving motor (11) on brace table (10), the output and gear (9) coaxial fixed connection of first driving motor (11), smash case (1) be equipped with the transfer case (1) outside and transfer to the matching between the conveying device (17) the crushing roller (17) below, crushing roller (17) below runs through to crushing mechanism (17), crushing case (18) and the conveying device (17) one side (17) is equipped with the transmission device (17) and run through 1) The inner side of the supporting frame (19) is provided with a screening part matched with the conveying equipment (17);

the distance adjusting mechanism comprises first through grooves (12) formed in the surface walls of two sides of the crushing box (1), the first supporting shaft (2) is connected with the first through grooves (12) in a sliding mode, a bottom plate (14) is arranged on the crushing box (1), a hydraulic rod (15) is arranged on the bottom plate (14), the output end of the hydraulic rod (15) is fixedly connected with a lantern ring (13), and the lantern ring (13) is sleeved on the first supporting shaft (2);

screening portion is including setting up fixed station (22) in support frame (19) inboard, fixed station (22) top-down is equipped with first screen cloth (21), second screen cloth (35) and collecting board (36) in proper order, first screen cloth (21) are hung through connecting rope (20) and are established on support frame (19), be equipped with vibration mechanism in order to drive first screen cloth (21), second screen cloth (35) and collecting board (36) vibration on fixed station (22).

2. The coal briquette crushing and screening machine for coal preparation according to claim 1, wherein the vibration mechanism comprises a chute (37) formed in the inner side of the fixed table (22), a support plate (38) is slidably connected to the chute (37), a second driving motor (39) is arranged on the support plate (38), two telescopic assemblies are arranged on the fixed table (22), each telescopic assembly comprises a second through groove (23), a third through groove (24), a telescopic rod (25), a sliding block (26) and a spring (27), the fixed table (22) is provided with the second through groove (23), the sliding block (26) is arranged in the second through groove (23), the telescopic rods (25) are arranged between the two sides of the sliding block (26) and the inner side walls of the two sides of the second through groove (23), the two ends of the telescopic rods (25) are fixedly connected with the sliding block (26) and the inner side walls of the second through groove (23) respectively, the telescopic rods (25) are sleeved with the springs (27), the two ends of the springs (27) are abutted against the sliding block (26) and the second through groove (23) respectively, the inner side walls of the fixed table (22) are provided with one of the through grooves (24), and one of the connecting shaft (26) is arranged on the second through groove (23), slider (26) upper end fixedly connected with first connecting block (33), the coaxial fixed connection of output of connecting axle (28) one end and second driving motor (39), the first connecting arm (29) of other end fixedly connected with, connecting axle (28) one end is kept away from in first connecting arm (29) and is rotated and be connected with pivot (30), rotate in pivot (30) and be connected with second connecting arm (31) and third connecting arm (32), pivot (30) one end is kept away from in third connecting arm (32) and first screen cloth (21) rotate and be connected, first connecting block (33) upper end is run through the third and is led to groove (24) and with collection board (36) fixed connection, slider (26) upper end fixedly connected with second connecting block (34) on another expansion assembly, the upper end of second connecting block (34) is run through the third and lead to groove (24) and with second screen cloth (35) fixed connection, slider (26) and second connecting arm (31) are kept away from pivot (30) one end and are rotated and are connected.

3. The coal briquette crushing and screening machine for coal dressing according to claim 2, characterized in that a collecting box (40) is provided on the side of the collecting plate (36) away from the conveying device (17), a negative pressure fan is provided in the collecting box (40), and a through hole (41) is provided at the upper end of the collecting box (40).

4. The coal briquette crushing and screening machine for coal dressing according to claim 3, wherein a plurality of through holes (41) are provided, and the plurality of through holes (41) are distributed in a rectangular array.

5. The coal briquette pulverizing and screening machine as claimed in claim 3, wherein the first screen (21), the second screen (35) and the collecting plate (36) are all disposed in an inclined manner, the upper end surface of the collecting box (40) is an inclined surface which is matched with the collecting plate (36), and the inclined angles of the first screen (21), the second screen (35) and the collecting plate (36) are the same.

6. The coal briquette pulverizing and screening machine as claimed in claim 5, wherein the first screen (21) has a larger pore size than the second screen (35).

7. The coal briquette crushing and screening machine for coal dressing according to claim 1, characterized in that a vertical plate (42) is arranged on the side of the fixed platform (22) far away from the conveying device (17), a first collecting frame (43), a second collecting frame (44) and a third collecting frame (45) are sequentially arranged on the vertical plate (42) from top to bottom, the first collecting frame (43) is matched with the first screen (21), the second collecting frame (44) is matched with the second screen (35), and the third collecting frame (45) is matched with the collecting plate (36).

8. The coal briquette crushing and screening machine according to claim 1, characterized in that the crushing box (1) above the crushing roller (4) is provided with a shielding plate (16) inside, which cooperates with the crushing roller (4).