Raw coal material crushing and screening machine

Abstract

The invention discloses a raw coal material crushing and screening machine, and belongs to the technical field of raw coal treatment equipment, the raw coal material crushing and screening machine comprises a crushing box and a screening box, a crushing mechanism is rotatably arranged in the crushing box, a coal falling groove is formed in the bottom wall of the screening box, and a shaking driving mechanism is arranged on the top wall of the screening box; a mounting frame is slidably arranged in the screening box, a screening net is slidably arranged in the mounting frame in a lifting mode and located above the coal falling groove, the crushing mechanism and the mounting frame are both connected with a shaking driving mechanism, and the shaking driving mechanism synchronously drives the crushing mechanism and the mounting frame. The invention particularly provides a raw coal crushing and screening machine which can ensure the linkage of crushing and screening actions and can effectively ensure the raw coal crushing effect.

Description

Technical Field

[0001] The invention belongs to the technical field of raw coal processing equipment, in particular to a raw coal crushing and screening machine. Background Art

[0002] In fertilizer plants, raw coal is often used as fuel for gasifiers. The combustible gas produced by the gasification reaction can be used as raw material for fertilizer production. Before adding the raw coal to the gasifier, a crusher is required to crush it into the required size, and a screening mechanism is used to screen the crushed raw coal.

[0003] When the existing crushing and screening machine crushes the raw coal, it generally crushes the raw coal through two relatively rotating crushing rollers, and the crushing effect is poor. At the same time, the crushing mechanism and screening mechanism of the existing crushing and screening machine are usually two independent structures, and the linkage between the crushing and screening actions is poor, the raw coal crushing and screening processing efficiency is low, and the production cost is high. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a raw coal crushing and screening machine to at least partially solve the problems raised in the above background technology.

[0005] The present invention provides the following technical solution: A raw coal crushing and screening machine proposed by the present invention comprises: A crushing box, in which a crushing mechanism is rotatably arranged; A screening box, wherein a coal chute is provided on the bottom wall of the screening box, a shaking drive mechanism is provided on the top wall of the screening box, a mounting frame is provided in the screening box for sliding movement, a screening net is provided in the mounting frame for lifting and sliding movement, the screening net is located above the coal chute, the crushing mechanism and the mounting frame are both connected to the shaking drive mechanism, and the shaking drive mechanism synchronously drives the crushing mechanism and the mounting frame; A knocking mechanism is provided on the top wall of the screening box, and the knocking mechanism is located above the screening net. The knocking mechanism includes a passively driven inclined panel, a driving plate is provided on the mounting frame, and an active driven inclined panel is provided on the driving plate. Both the active driven inclined panel and the passive driven inclined panel are provided with pressing inclined surfaces, and the active driven inclined panel and the pressing inclined surfaces of the passive driven inclined panel are fitted together. The active driven inclined panel is configured to be driven by the mounting frame to fit the passive driven inclined panel and slide, and the active driven inclined panel is used to press the passive driven inclined panel to descend and knock the screening net.

[0006] Furthermore, the knocking mechanism includes a support frame, a sliding column and a knocking plate, the support frame is fixed on the top wall of the screening box, the sliding column is slidably arranged on the support frame, the passively driven inclined plate and the knocking plate are respectively connected to the upper end and the lower end of the sliding column, the knocking plate is located above the screening net, and a reset spring is sleeved on the sliding column, and the two ends of the reset spring are respectively connected to the support frame and the passively driven inclined plate.

[0007] Furthermore, the shaking drive mechanism includes a shaking motor, a shaking drive disk and a push-pull column. The shaking motor is fixed on the inner top wall of the screening box, the shaking drive disk is connected to the output shaft of the shaking motor, the push-pull column is eccentrically fixed on the shaking drive disk, a push-pull plate is fixed on the end of the mounting frame away from the drive plate, a push-pull groove is provided on the push-pull plate, and the push-pull column is snap-fitted and slidably arranged in the push-pull groove.

[0008] Furthermore, guide columns are provided between the two opposite side walls of the screening box, the installation frame is slidably provided on the guide columns, and a vibration assembly is provided between the installation frame and the screening net.

[0009] Furthermore, the vibration assembly includes a sleeve, a sliding rod and a vibration spring. The sleeve is fixed on the mounting frame, the sliding rod is slidably arranged in the sleeve, the sliding rod is connected to the screening net, the vibration spring is sleeved outside the sleeve and the sliding rod, and the two ends of the vibration spring are respectively connected to the screening net and the mounting frame.

[0010] Furthermore, the screening net comprises a frame and a net body, the frame is provided with a crushing mechanism, and the crushing mechanism is located above the net body.

[0011] The crushing mechanism includes a crushing motor and crushing rollers. The crushing motor is fixed on a frame. A plurality of crushing rollers are rotatable on the frame. One group of crushing rollers is connected to the output shaft of the crushing motor. Two adjacent groups of crushing rollers are correspondingly provided with belt pulleys, and two adjacent groups of belt pulleys are sleeved with belts.

[0012] Furthermore, a feeding hopper is provided on the top wall of the crushing box, a discharge port is provided on the bottom wall of the crushing box, the discharge port penetrates the top wall of the screening box, the discharge port is located above the screening net, a collecting hopper is provided in the middle of the crushing box, and the crushing mechanism includes a first crushing mechanism and a second crushing mechanism, and the first crushing mechanism and the second crushing mechanism are respectively located above and below the collecting hopper.

[0013] Furthermore, the first crushing mechanism comprises two sets of crushing rollers which rotate relatively synchronously.

[0014] Furthermore, the second crushing mechanism includes a crushing shaft, which is rotatably arranged on the bottom wall of the crushing box, and sprockets are correspondingly arranged on the crushing shaft and the output shaft of the shaking motor, and a chain is sleeved on the sprocket, and the sprocket is meshed with the chain.

[0015] A crushing rod is fixedly arranged on the crushing shaft, and a plurality of crushing rods are arranged along the height direction of the crushing shaft. The spacing between the crushing rods arranged from top to bottom of the crushing shaft and the side wall of the crushing box gradually decreases.

[0016] Furthermore, a conical bulk material receiving body is provided at the upper end of the crushing shaft, and the diameter of the lower end of the conical bulk material receiving body is smaller than the length of the uppermost group of crushing rods.

[0017] Furthermore, a conical platform is provided in the middle of the bottom wall of the crushing box, a guide platform is provided on the circumference of the bottom wall of the crushing box, the height of the discharge port is lower than the heights of the conical platform and the guide platform, a scraper is provided at the lower end of the crushing shaft, and the scraper is fitted with the conical platform, the bottom wall of the crushing box and the guide platform.

[0018] The beneficial effects achieved by the present invention using the above structure are as follows: (1) By setting up the shaking drive mechanism, the linkage between the crushing of the second crushing mechanism and the reciprocating screening of the screening net is realized; by setting up the knocking mechanism, the knocking plate is driven to rise and fall to knock the screening net while the screening net is reciprocating and screening, and the screening efficiency of the screening net is improved by the coordination of the reciprocating shaking and knocking actions.

[0019] (2) The cooperation between the first crushing mechanism and the second crushing mechanism realizes the secondary crushing of the raw coal, thus ensuring the crushing effect of the raw coal. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 It is a schematic diagram of a main stereoscopic cross-sectional structure of an embodiment of the present invention; Figure 3 for Figure 2 A partial enlarged view of part A; Figure 4 for Figure 2 A partial enlarged view of part B; Figure 5 It is a schematic diagram of a side-view stereoscopic cross-sectional structure of an embodiment of the present invention; Figure 6 It is a bottom-up stereoscopic cross-sectional structural schematic diagram of an embodiment of the present invention; Figure 7 It is a top view of a three-dimensional cross-sectional structure schematic diagram of a screening net according to an embodiment of the present invention; Figure 8 for Figure 7 A partial enlarged view of part C.

[0021] Among them, 1. crushing box, 2. coal chute, 3. installation frame, 4. passive drive inclined plate, 5. drive plate, 6. active drive inclined plate, 7. support frame, 8. sliding column, 9. knocking plate, 10. reset spring, 11. shaking motor, 12. shaking drive disk, 13. push-pull column, 14. push-pull plate, 15. push-pull slide, 16. guide column, 17. sleeve, 18. slide bar, 19. vibration spring, 20. crushing motor, 21. crushing roller, 22. belt, 23. feeding hopper, 24. discharge port, 25. collecting hopper, 26. crushing roller, 27. crushing shaft, 28. chain, 29. crushing rod, 30. bulk material receiving body, 31. conical table, 32. guide table, 33. scraper, 34. screening net, 35. screening box. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0024] This embodiment is an improvement on the technical problem that when existing crushing and screening machines crush and screen raw coal, the crushing mechanism and the screening mechanism are two independent structures, the linkage between the crushing and screening actions is poor, the raw coal crushing and screening efficiency is low, and the production cost is high.

[0025] See also Figure 1-Figure 3 , Figure 5 The present embodiment provides a raw coal crushing and screening machine, comprising: A crushing box 1, in which a crushing mechanism is rotatably arranged; A screening box 35, a coal chute 2 is provided on the bottom wall of the screening box 35, a shaking drive mechanism is provided on the top wall of the screening box 35, a mounting frame 3 is slidably provided in the screening box 35, a screening net 34 is lifted and slidably provided in the mounting frame 3, the screening net 34 is located above the coal chute 2, the raw coal screened by the screening net 34 falls out through the coal chute 2, the crushing mechanism and the mounting frame 3 are both connected to the shaking drive mechanism, the shaking drive mechanism synchronously drives the crushing mechanism and the mounting frame 3, thereby realizing the linkage of crushing and screening; A knocking mechanism is provided on the top wall of the screening box 35, and the knocking mechanism is located above the screening net 34. The knocking mechanism includes a passively driven inclined panel 4, a driving plate 5 is provided on the mounting frame 3, and an active driven inclined panel 6 is provided on the driving plate 5. Both the active driven inclined panel 6 and the passively driven inclined panel 4 are provided with pressing inclined surfaces, and the active driven inclined panel 6 and the pressing inclined surfaces of the passively driven inclined panel 4 are fitted together. The active driven inclined panel 6 is configured to be driven by the mounting frame 3 to fit the passively driven inclined panel 4 and slide. The active driven inclined panel 6 is used to press the passively driven inclined panel 4 to descend and knock the screening net 34, and the screening efficiency of the screening net 34 is improved by moving the passively driven inclined panel 4 downward to knock the screening net 34 in coordination with the reciprocating movement of the screening net 34.

[0026] It should be noted that, in actual use, a conveyor belt 22 may be provided below the coal chute 2 of the screening box 35 to receive and transport the screened raw coal.

[0027] Specifically, see Figure 2 and Figure 3 In this embodiment, the knocking mechanism includes a support frame 7, a sliding column 8 and a knocking plate 9. The support frame 7 is fixed on the top wall of the screening box 35. The sliding column 8 is slidably arranged on the support frame 7. The passively driven inclined panel 4 and the knocking plate 9 are respectively connected to the upper end and the lower end of the sliding column 8. The knocking plate 9 is located above the screening net 34. A reset spring 10 is sleeved on the sliding column 8. The two ends of the reset spring 10 are respectively connected to the support frame 7 and the passively driven inclined panel 4. When working, the mounting frame 3 drives the screening net 34 to reciprocate and pushes the actively driven inclined panel 6 to reciprocate. The actively driven inclined panel 6 cooperates with the reset spring 10 to control the lifting of the passively driven inclined panel 4 during the reciprocating movement. The passively driven inclined panel 4 drives the knocking plate 9 to lift and lower through the sliding column 8. The knocking plate 9 knocks the screening net 34 when it lifts and lowers, thereby improving the screening efficiency of the raw coal.

[0028] It should be noted that two groups of active driving inclined plates 6 are symmetrically arranged on the mounting plate, and two groups of knocking mechanisms are arranged corresponding to the active driving inclined plates 6 . The two groups of knocking mechanisms are respectively arranged corresponding to the two side edges of the screening net 34 .

[0029] Specifically, see Figure 2 , Figure 6 and Figure 7In this embodiment, the shaking drive mechanism includes a shaking motor 11, a shaking drive disk 12 and a push-pull column 13. The shaking motor 11 is fixed on the inner top wall of the screening box 35, the shaking drive disk 12 is connected to the output shaft of the shaking motor 11, and the push-pull column 13 is eccentrically fixed on the shaking drive disk 12. A push-pull plate 14 is fixed on the end of the mounting frame 3 away from the driving plate 5. A push-pull groove 15 is provided on the push-pull plate 14, and the push-pull column 13 is engaged and slidably arranged in the push-pull groove 15. When working, the shaking motor 11 drives the shaking drive disk 12 to rotate, and the shaking drive disk 12 drives the push-pull column 13 to rotate synchronously with it. When the push-pull column 13 rotates, it slides along the push-pull groove 15, thereby driving the mounting frame 3 to move back and forth and shake in the screening box 35.

[0030] Specifically, see Figure 2 , Figure 5-Figure 7 In this embodiment, a guide column 16 is provided between the two opposite side walls of the screening box 35, the mounting frame 3 is slidably provided on the guide column 16, and a vibration component is provided between the mounting frame 3 and the screening net 34. Through the setting of the vibration component, the screening net 34 is vibrated and shaken under the striking action of the striking plate 9, thereby improving the screening efficiency of the crushed raw coal.

[0031] Specifically, see Figure 2 and Figure 4 In this embodiment, the vibration assembly includes a sleeve 17, a slide rod 18 and a vibration spring 19. The sleeve 17 is fixed on the mounting frame 3, the slide rod 18 is slidably arranged in the sleeve 17, the slide rod 18 is connected to the screening net 34, the vibration spring 19 is sleeved outside the sleeve 17 and the slide rod 18, and the two ends of the vibration spring 19 are respectively connected to the screening net 34 and the mounting frame 3.

[0032] Specifically, see Figure 2 , Figure 7 and Figure 8 In this embodiment, the screening net 34 includes a frame and a net body, and a crushing mechanism is provided on the frame, and the crushing mechanism is located above the net body; the crushing mechanism includes a crushing motor 20 and a crushing roller 21, and the crushing motor 20 is fixed on the frame, and a plurality of crushing rollers 21 are provided on the frame to rotate, and a group of crushing rollers 21 is connected to the output shaft of the crushing motor 20, and two adjacent groups of crushing rollers 21 are correspondingly provided with belt 22 disks, and two adjacent groups of belt 22 disks are sleeved with belt 22, and the synchronous driving of the plurality of crushing rollers 21 is realized under the cooperation of the belt 22 and the belt 22 disk, and the plurality of crushing rollers 21 cooperate to further crush the large particles of raw coal that cannot be smoothly screened off on the net body.

[0033] Specifically, see Figure 2In this embodiment, a feeding hopper 23 is provided on the top wall of the crushing box 1, and a discharge port 24 is provided on the bottom wall of the crushing box 1. The discharge port 24 penetrates the top wall of the screening box 35, and the discharge port 24 is located above the screening net 34. A collecting hopper 25 is provided in the middle of the crushing box 1. The crushing mechanism includes a first crushing mechanism and a second crushing mechanism. The first crushing mechanism and the second crushing mechanism are respectively located above and below the collecting hopper 25. The first crushing mechanism performs primary crushing on the raw coal in the crushing box 1, and the second crushing mechanism performs secondary crushing on the raw coal in the crushing box 1. The crushing effect of the raw coal is improved by the cooperation of the first crushing mechanism and the second crushing mechanism.

[0034] Specifically, see Figure 1 and Figure 2 In this embodiment, the first crushing mechanism includes two sets of crushing rollers 26 that rotate relatively synchronously. The relatively synchronous rotation driving structure of the two sets of crushing rollers 26 is a prior art, so it will not be described in detail in this embodiment.

[0035] Specifically, see Figure 2 and Figure 5 In this embodiment, the second crushing mechanism includes a crushing shaft 27, which is rotatably arranged on the bottom wall of the crushing box 1. Sprockets are correspondingly arranged on the crushing shaft 27 and the output shaft of the shaking motor 11. A chain 28 is sleeved on the sprocket, and the sprocket is meshed with the chain 28. When the shaking motor 11 drives the screening net 34 to shake and screen back and forth, the crushing shaft 27 is driven to rotate under the cooperation of the sprocket and the chain 28, thereby realizing the linkage of the crushing and screening actions; a crushing rod 29 is fixedly arranged on the crushing shaft 27, and a plurality of crushing rods 29 are arranged along the height direction of the crushing shaft 27. The distance between the crushing rods 29 arranged from top to bottom on the crushing shaft 27 and the side wall of the crushing box 1 gradually decreases, thereby gradually crushing the raw coal into the required particle size.

[0036] Specifically, see Figure 2 and Figure 5 In this embodiment, a conical bulk material receiving body 30 is provided at the upper end of the crushing shaft 27. The diameter of the lower end of the conical bulk material receiving body 30 is smaller than the length of the uppermost group of crushing rods 29. The conical bulk material receiving body 30 is used to receive the raw coal falling from the collecting hopper 25, and guide the raw coal from the axis of the crushing shaft 27 to the periphery under the guidance of the conical bulk material receiving body 30 and the action of centrifugal force, so as to prevent the raw coal from falling directly on the crushing shaft 27 and failing to be crushed.

[0037] Specifically, see Figure 2 and Figure 5In this embodiment, a conical platform 31 is provided in the middle of the bottom wall of the crushing box 1, and a guide platform 32 is provided on the circumference of the bottom wall of the crushing box 1. The height of the discharge port 24 is lower than the heights of the conical platform 31 and the guide platform 32. A scraper 33 is provided at the lower end of the crushing shaft 27. The scraper 33 is in contact with the conical platform 31, the bottom wall of the crushing box 1 and the guide platform 32. When the crushing shaft 27 rotates, the scraper 33 is driven to rotate with it, and the scraper 33 scrapes the raw coal on the bottom wall of the crushing box 1 out of the discharge port 24.

[0038] The working principle of the raw coal crushing and screening machine provided in this embodiment is as follows: (1) Raw coal is added to the crushing box 1 through the feeding hopper 23. Under the action of the first crushing mechanism, two sets of relatively rotating crushing rollers 26 perform primary crushing on the raw coal. The raw coal after primary crushing falls onto the bulk material receiving body 30 through the collecting hopper 25; (2) The shaking motor 11 is started. Under the action of the chain 28 and the sprocket, the shaking motor 11 drives the crushing shaft 27 to rotate. The crushing shaft 27 drives the crushing rod 29 to rotate with it. The crushing rod 29 performs secondary crushing on the raw coal guided by the bulk material receiving body 30. The secondary crushed raw coal falls onto the bottom wall of the crushing box 1 and falls onto the screening net 34 through the discharge port 24 under the action of the scraper 33. At the same time, the shaking motor 11 drives the shaking driving disk 12 to rotate, and when the shaking driving disk 12 rotates, it drives the push-pull column 13 to rotate with it, and the push-pull column 13 slides along the push-pull slide groove 15 to drive the push-pull plate 14 to reciprocate with the rotation of the push-pull column 13, and the push-pull plate 14 drives the installation frame 3 to slide along the guide column 16, thereby driving the screening net 34 to reciprocate. During the reciprocating movement of the screening net 34, the raw coal received on the screening net 34 is screened; (3) The installation frame 3 moves back and forth under the driving action of the push-pull column 13, while driving the driving plate 5 to move, and the driving plate 5 drives the active driving inclined plate 6 to move back and forth: Reference Figure 2 When the driving plate 5 moves to the left, the active driving inclined plate 6 is attached to the upper surface of the passive driving inclined plate 4 and moves to the left. The passive driving inclined plate 4 is pressed downward by the active driving inclined plate 6, and the passive driving inclined plate 4 drives the sliding column 8 and the knocking plate 9 to move downward. When the knocking plate 9 moves downward, it knocks the screening net 34. During this process, the return spring 10 is compressed; when the driving plate 5 moves to the right, the active driving inclined plate 6 gradually moves away from the upper surface of the passive driving inclined plate 4. Under the action of the return spring 10, the passive driving inclined plate 4 drives the knocking plate 9 to move upward and away from the screening net 34; The knocking plate 9 knocks the screening net 34 during the lifting process, and the left and right reciprocating movement of the screening net 34 improves the screening efficiency of the raw coal. During the above whole process, the extension and contraction of the vibration spring 19 and the relative sliding between the slide bar 18 and the sleeve 17 are adapted to the vibration action of the screening net 34. (4) The raw coal that meets the requirements and is screened by the screening net 34 falls through the coal chute 2, and the raw coal that does not meet the requirements is crushed into required particles by the crushing mechanism. The working process of the crushing mechanism is as follows: start the crushing motor 20, and the belt 22 and the belt 22 disk can drive the multiple groups of crushing rollers 21 to rotate. The rotating crushing rollers 21 can complete the crushing of the raw coal on the screening net 34.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, material or apparatus including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, material or apparatus.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A raw coal crushing and screening machine, characterized in that: include: A crushing box (1), wherein a crushing mechanism is rotatably provided inside the crushing box (1); A screening box (35), wherein a coal chute (2) is provided on the bottom wall of the screening box (35), a shaking drive mechanism is provided on the top wall of the screening box (35), a mounting frame (3) is slidably provided in the screening box (35), a screening net (34) is provided in the mounting frame (3) in a lifting and sliding manner, the screening net (34) is located above the coal chute (2), the crushing mechanism and the mounting frame (3) are both connected to the shaking drive mechanism, and the shaking drive mechanism synchronously drives the crushing mechanism and the mounting frame (3); A knocking mechanism is provided on the top wall of the screening box (35), the knocking mechanism is located above the screening net (34), the knocking mechanism comprises a passive driving inclined plate (4), a driving plate (5) is provided on the mounting frame (3), an active driving inclined plate (6) is provided on the driving plate (5), both the active driving inclined plate (6) and the passive driving inclined plate (4) are provided with pressing inclined surfaces, the active driving inclined plate (6) and the pressing inclined surfaces of the passive driving inclined plate (4) are arranged to fit together, the active driving inclined plate (6) is configured to be driven by the mounting frame (3) to fit together with the passive driving inclined plate (4) to slide, and the active driving inclined plate (6) is used to press the passive driving inclined plate (4) to descend and knock the screening net (34).

2. The raw coal crushing and screening machine according to claim 1, characterized in that: The knocking mechanism comprises a support frame (7), a sliding column (8) and a knocking plate (9); the support frame (7) is fixedly arranged on the top wall of the screening box (35); the sliding column (8) penetrates and slides on the support frame (7); the passive drive inclined plate (4) and the knocking plate (9) are respectively connected to the upper end and the lower end of the sliding column (8); the knocking plate (9) is located above the screening net (34); a return spring (10) is sleeved on the sliding column (8); and the two ends of the return spring (10) are respectively connected to the support frame (7) and the passive drive inclined plate (4).

3. The raw coal crushing and screening machine according to claim 1, characterized in that: The shaking drive mechanism comprises a shaking motor (11), a shaking drive disk (12) and a push-pull column (13); the shaking motor (11) is fixedly arranged on the inner top wall of the screening box (35); the shaking drive disk (12) is connected to the output shaft of the shaking motor (11); the push-pull column (13) is eccentrically fixedly arranged on the shaking drive disk (12); a push-pull plate (14) is fixedly arranged on one end of the mounting frame (3) away from the drive plate (5); a push-pull groove (15) is provided on the push-pull plate (14); and the push-pull column (13) is slidably arranged in the push-pull groove (15).

4. The raw coal crushing and screening machine according to claim 1, characterized in that: A guide column (16) is provided between two opposite side walls of the screening box (35), the mounting frame (3) is slidably mounted on the guide column (16), and a vibration assembly is provided between the mounting frame (3) and the screening net (34).

5. The raw coal crushing and screening machine according to claim 4, characterized in that: The vibration assembly comprises a sleeve (17), a slide rod (18) and a vibration spring (19); the sleeve (17) is fixedly mounted on the mounting frame (3); the slide rod (18) is slidably mounted in the sleeve (17); the slide rod (18) is connected to a screening net (34); the vibration spring (19) is sleeved outside the sleeve (17) and the slide rod (18); and two ends of the vibration spring (19) are respectively connected to the screening net (34) and the mounting frame (3).

6. The raw coal crushing and screening machine according to claim 1, characterized in that: The screening net (34) comprises a frame and a net body, the frame is provided with a crushing mechanism, and the crushing mechanism is located above the net body; The pulverizing mechanism comprises a pulverizing motor (20) and pulverizing rollers (21), wherein the pulverizing motor (20) is fixedly mounted on a frame, and a plurality of pulverizing rollers (21) are rotatably mounted on the frame, wherein one group of pulverizing rollers (21) is connected to an output shaft of the pulverizing motor (20), and belt (22) disks are correspondingly mounted on two adjacent groups of pulverizing rollers (21), and belts (22) are sleeved on two adjacent groups of belt (22) disks.

7. The raw coal crushing and screening machine according to claim 1, characterized in that: A feeding hopper (23) is provided on the top wall of the crushing box (1), a discharge port (24) is provided on the bottom wall of the crushing box (1), the discharge port (24) is arranged through the top wall of the screening box (35), the discharge port (24) is located above the screening net (34), a collecting hopper (25) is provided in the middle of the crushing box (1), and the crushing mechanism comprises a first crushing mechanism and a second crushing mechanism, the first crushing mechanism and the second crushing mechanism are respectively located above and below the collecting hopper (25).

8. The raw coal crushing and screening machine according to claim 7, characterized in that: The first crushing mechanism comprises two sets of crushing rollers (26) that rotate relatively synchronously; The second crushing mechanism comprises a crushing shaft (27), the crushing shaft (27) is rotatably disposed on the bottom wall of the crushing box (1), the crushing shaft (27) and the output shaft of the shaking motor (11) are correspondingly provided with sprockets, the sprockets are sleeved with chains (28), and the sprockets are meshed with the chains (28); A crushing rod (29) is fixedly provided on the crushing shaft (27), and a plurality of crushing rods (29) are provided along the height direction of the crushing shaft (27). The spacing between the crushing rods (29) arranged from top to bottom of the crushing shaft (27) and the side wall of the crushing box (1) gradually decreases.

9. The raw coal crushing and screening machine according to claim 8, characterized in that: A conical bulk material receiving body (30) is provided at the upper end of the crushing shaft (27), and the diameter of the lower end of the conical bulk material receiving body (30) is smaller than the length of the uppermost group of crushing rods (29).

10. The raw coal crushing and screening machine according to claim 8, characterized in that: A conical platform (31) is provided in the middle of the bottom wall of the crushing box (1), a guide platform (32) is provided on the circumference of the bottom wall of the crushing box (1), the height of the discharge port (24) is lower than the heights of the conical platform (31) and the guide platform (32), and a scraper (33) is provided at the lower end of the crushing shaft (27), and the scraper (33) is in contact with the conical platform (31), the bottom wall of the crushing box (1) and the guide platform (32).

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