A mechanical crushing device for mine ore

Abstract

The present invention relates to the technical field of ore crushing, and discloses a mechanical crushing device for mining ores, comprising a crushing box, one side of the crushing box is rotatably connected to a first mounting shaft, the first mounting shaft is fixedly connected to a first mounting tube rotatably connected to the crushing box, and the outer surface of the first mounting shaft is fixedly sleeved with a first gear. The mechanical crushing device for mining ores automatically screens the crushed ore through a filter plate, so that the qualified ore is screened out and the unqualified ore continues to remain on the filter plate, and at the same time, a scraper is driven by a transmission mechanism to automatically clean the ore fragments on the filter plate, and send them into a first transmission groove and then discharge them to a crushing knife through a discharging groove, so that the ore fragments that fail the screening can be automatically sent back to the crushing knife for re-crushing, thereby realizing automatic control of the entire crushing and screening process, reducing the need for manual intervention, and improving production efficiency and stability.

Description

Technical Field

[0001] The invention relates to the technical field of ore crushing, and in particular to a mechanical crushing device for mine ore. Background Art

[0002] Ore crushing is an important part of ore processing, and its purpose is to crush large pieces of ore into small particles that meet the requirements of subsequent processing. With the development of industrial technology, ore crushing technology has also evolved from simple manual crushing to mechanized and automated crushing. At present, there are many types of ore crushing equipment, including jaw crusher, cone crusher, impact crusher, roller crusher, etc. Each device has its own unique crushing principle and scope of application.

[0003] The existing ore crushing device usually crushes the ore directly through the crushing knife during crushing, and is unable to screen the crushed ore. The crushed ore needs to be sent to a screening machine for screening in order to screen out qualified ore. At the same time, the unqualified ore cannot be automatically fed back to the crushing device for crushing, so the unqualified ore needs to be manually fed back for processing again, resulting in low ore crushing efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a mechanical crushing device for mining ores to solve the shortcomings of the above-mentioned background technology.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A mechanical crushing device for mining ore comprises a crushing box, one side of the crushing box is rotatably connected to a first mounting shaft, the first mounting shaft is fixedly connected to a first mounting tube rotatably connected to the crushing box, the outer surface of the first mounting shaft is fixedly sleeved with a first gear, the outer surface of the first gear is meshingly connected to two second gears, the middle of the second gear is fixedly sleeved with a second mounting shaft rotatably connected to the crushing box, one end of the second mounting shaft is fixedly connected to a second mounting tube rotatably connected to the crushing box, the outer surfaces of the first mounting tube and the second mounting tube are both fixedly connected to a plurality of crushing knives, the outer surface of the first mounting shaft is drivingly connected to a driving mechanism connected to the crushing box, and the driving mechanism is used to drive the first mounting shaft to rotate;

[0007] The crushing box is provided with a screening and returning mechanism, which is used to screen the crushed ore and return the unqualified ore to the crushing knife for re-crushing. The crushing box is provided with a dust removal mechanism connected to the first mounting tube and the second mounting tube, which is used to remove dust generated during crushing.

[0008] As a further solution of the present invention: the screening and returning mechanism includes a mounting groove opened on the crushing box, a filter plate is slidably connected in the mounting groove, a first telescopic rod fixedly connected to the mounting groove is fixedly connected to one side of the filter plate, a first spring fixedly connected to the mounting groove is fixedly sleeved on the outer surface of the first telescopic rod, and a scraping mechanism is provided on the crushing box.

[0009] As a further solution of the present invention: the scraper mechanism includes a first transmission groove opened on the crushing box, two second transmission grooves are opened in the first transmission groove, a transmission column is slidably connected in the second transmission groove, a scraper is fixedly connected between the two transmission columns, a discharge groove is opened in the first transmission groove, and one end of the transmission column is fixedly connected to a transmission mechanism connected to the crushing box.

[0010] As a further solution of the present invention: the transmission mechanism includes a transmission motor fixedly connected to the crushing box, the output end of the transmission motor is fixedly connected to the first rotating shaft through a coupling, the outer surface of the first rotating shaft is fixedly sleeved with a first transmission gear, the outer surface of the first transmission gear is meshingly connected with a second transmission gear, the middle of the second transmission gear is fixedly sleeved with a second rotating shaft rotatably connected to the crushing box, the outer surface of the second rotating shaft is fixedly sleeved with two third transmission gears, the outer surface of the third transmission gear is meshingly connected with a transmission gear ring, the inner surface of the transmission gear ring is fixedly connected with a transmission ring rotatably connected to the crushing box, and the transmission ring is fixedly connected to the transmission column.

[0011] As a further solution of the present invention: a plurality of anti-collision rods fixedly connected to the mounting grooves are arranged above the filter plate.

[0012] As a further solution of the present invention: the dust removal mechanism includes a first transmission pipe fixedly connected to the first mounting pipe, the first transmission pipe is rotatably connected to the crushing box, one end of the first transmission pipe is rotatably connected to a water supply mechanism, a plurality of water spray holes are provided on the outer surface of the first mounting pipe, one end of the second mounting pipe is fixedly connected to the second transmission pipe rotatably connected to the crushing box, one end of the second transmission pipe is rotatably connected to the first connecting pipe fixedly connected to the crushing box, one end of the first connecting pipe is fixedly connected to an air suction box fixedly connected to the crushing box through a pipeline, the air suction box is rotatably connected to the first transmission pipe, a fan blade is fixedly sleeved on the outer surface of the first transmission pipe, the outer surface of the air suction box is fixedly connected to an air intake pipe fixedly connected to the crushing box, a dust suction groove is provided on the second mounting pipe, and an opening and closing mechanism is provided in the dust suction groove.

[0013] As a further solution of the present invention: the water supply mechanism includes a second connecting pipe rotatably connected to the first transmission pipe, the second connecting pipe is fixedly connected to the suction box, and one end of the second connecting pipe is fixedly connected to a water pump fixedly connected to the crushing box through a pipeline.

[0014] As a further solution of the present invention: the opening and closing mechanism includes a transmission box slidably connected to the dust suction groove, a plurality of ball bearings are slidably connected in the transmission box, a stopper slidably connected to the dust suction groove is fixedly connected to one side of the transmission box, a through groove is provided on the stopper, a second telescopic rod fixedly connected to the second mounting tube is fixedly connected to the bottom of the transmission box through a connecting block, a second spring fixedly connected to the transmission box is fixedly connected to the outer surface of the second telescopic rod, a plurality of dust suction holes are provided in the dust suction groove, and a plurality of dredging rods slidably connected to the dust suction holes are fixedly connected to one side of the stopper.

[0015] As a further solution of the present invention: the driving mechanism includes a driving motor fixedly connected to the crushing box, the output end of the driving motor is fixedly connected to the driving shaft through a coupling, and the outer surface of the driving shaft is fixedly sleeved with a first driving gear meshing with the first gear.

[0016] Beneficial effects of the present invention:

[0017] (1) The crushed ore is automatically screened through the filter plate, so that the qualified ore is screened out and the unqualified ore continues to remain on the filter plate. At the same time, the transmission mechanism drives the scraper to automatically clean the ore fragments on the filter plate, and send them into the first transmission groove and then discharge them to the crushing knife through the discharge groove, so that the unqualified ore fragments can be automatically sent back to the crushing knife for re-crushing, realizing the automatic control of the entire crushing and screening process, reducing the need for manual intervention, and improving production efficiency and stability.

[0018] (2) Through the buffering effect of the first telescopic rod and the first spring, the direct impact of the ore fragments on the filter plate is effectively alleviated, and the wear and damage of the filter plate caused by long-term high impact force is reduced, thereby significantly extending the service life of the filter plate and reducing the cost and time consumption caused by equipment replacement and maintenance.

[0019] (3) The first transmission pipe and the first installation pipe are supplied with water through the water supply mechanism, and the dust in the crushing box is treated with dust reduction by the water mist sprayed from the water spray hole. At the same time, the transmission box and the ball design in the second installation pipe realize the intelligent adjustment of the dust suction hole. When the transmission box rotates to the upper part, the ball rolls to the bottom of the transmission box under the action of gravity, driving the transmission box and the block to move downward, thereby opening the dust suction hole in the upper part and blocking the dust suction hole in the lower part. This design ensures that the dust suction hole only sucks the dust floating upward in the upper part of the crushing box, improves the pertinence and efficiency of dust suction, and effectively prevents dust from overflowing from the feed port of the crushing box. At the same time, the inhaled dust enters the suction box through the pipeline and is not directly discharged into the environment, but is discharged into the crushing box again through the air intake pipe. At this time, the water mist sprayed from the first installation pipe will perform secondary dust reduction treatment on the dust, realizing the recycling and reuse of dust, and further reducing the pollution of dust to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 is a first stereogram of the external structure of the present invention;

[0022] Figure 2 is a second stereoscopic diagram of the external structure of the present invention;

[0023] Figure 3 It is a three-dimensional diagram of the internal structure of the present invention;

[0024] Figure 4 is a front view of the internal structure of the second mounting tube of the present invention;

[0025] Figure 5 This is a front view of the internal structure of the suction box of the present invention;

[0026] Figure 6 The present invention Figure 3 A magnified view of middle;

[0027] Figure 7 The present invention Figure 4 Enlarged view of middle B;

[0028] Figure 8 The present invention Figure 4 Enlarged view of C in the middle.

[0029] In the figure: 1, crushing box; 2, first mounting shaft; 3, first mounting tube; 4, first gear; 5, second gear; 6, second mounting shaft; 7, second mounting tube; 8, crushing knife; 21, mounting slot; 22, filter plate; 23, first telescopic rod; 24, first spring; 25, anti-collision rod; 31, first transmission slot; 32, second transmission slot; 33, transmission column; 34, scraper; 35, discharge slot; 41, transmission motor; 42, first rotating shaft; 43, first transmission gear; 44, second transmission gear; 45, second Rotating shaft; 46, third transmission gear; 47, transmission gear ring; 48, transmission ring; 51, first transmission pipe; 52, water spray hole; 53, second transmission pipe; 54, first connecting pipe; 55, air suction box; 56, fan blade; 57, air inlet pipe; 58, dust suction groove; 61, second connecting pipe; 62, water pump; 71, transmission box; 72, ball bearing; 73, block; 74, second telescopic rod; 75, second spring; 76, dust suction hole; 77, dredging rod; 81, driving motor; 82, driving shaft; 83, first driving tooth. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Embodiment 1

[0032] See also Figure 1-Figure 8 As shown, the present invention is a mechanical crushing device for mining ores, comprising a crushing box 1, one side of the crushing box 1 is rotatably connected with a first mounting shaft 2, the first mounting shaft 2 is fixedly connected with a first mounting tube 3 rotatably connected with the crushing box 1, the outer surface of the first mounting shaft 2 is fixedly sleeved with a first gear 4, the outer surface of the first gear 4 is meshingly connected with two second gears 5, the middle of the second gear 5 is fixedly sleeved with a second mounting shaft 6 rotatably connected with the crushing box 1, one end of the second mounting shaft 6 is fixedly connected with a second mounting tube 7 rotatably connected with the crushing box 1, the outer surfaces of the first mounting tube 3 and the second mounting tube 7 are both fixedly connected with a plurality of crushing knives 8, the outer surface of the first mounting shaft 2 is transmission-connected with a driving mechanism connected with the crushing box 1, and the driving mechanism is used to drive the first mounting shaft 2 to rotate;

[0033] A screening and returning mechanism is provided on the crushing box 1, which is used to screen the crushed ore and return the unqualified ore to the crushing knife 8 for re-crushing. A dust removal mechanism connected to the first mounting tube 3 and the second mounting tube 7 is provided on the crushing box 1, and the dust removal mechanism is used to remove dust generated during crushing.

[0034] The driving mechanism includes a driving motor 81 fixedly connected to the crushing box 1. The driving motor 81 is controlled by a PLC programming program, and the driving motor 81 can be controlled to rotate forward and reverse and rotate at an angle. The output end of the driving motor 81 is fixedly connected to a driving shaft 82 through a coupling, and the outer surface of the driving shaft 82 is fixedly sleeved with a first driving gear 83 meshing with the first gear 4.

[0035] The driving motor 81 drives the driving shaft 82 to rotate, and the driving shaft 82 drives the first gear 4 to rotate through the first driving gear 83 .

[0036] The ore is poured into the crushing box 1, and then the first mounting shaft 2 is driven to rotate by the driving mechanism. The first mounting shaft 2 drives the second mounting shaft 6 to rotate through the first gear 4 and the second gear 5. The first mounting shaft 2 and the second mounting shaft 6 respectively drive the first mounting pipe 3 and the second mounting pipe 7 to rotate. The first mounting pipe 3 and the second mounting pipe 7 drive the crushing knife 8 to rotate. The crushing knife 8 fully crushes the ore, and the crushed ore fragments enter the screening and returning mechanism. Then the screening and returning mechanism screens the crushed ore, and the qualified fragments are discharged through the screening and returning mechanism, and the unqualified fragments remain on the screening and returning mechanism. At the same time, the screening and returning mechanism automatically feeds the unqualified fragments to the top of the crushing knife 8, and then the crushing knife 8 is crushed again, so as to achieve full crushing of the ore. At the same time, during the crushing process, the dust generated during the crushing is automatically removed by the dust removal mechanism, which greatly reduces the pollution of dust to the environment.

[0037] Embodiment 2

[0038] Based on Example 1, please refer to Figure 1 , Figure 3 and Figure 6 As shown, the screening and returning mechanism includes a mounting groove 21 provided on the crushing box 1, a filter plate 22 is slidably connected in the mounting groove 21, a first telescopic rod 23 fixedly connected to the mounting groove 21 is fixedly connected to one side of the filter plate 22, a first spring 24 fixedly connected to the mounting groove 21 is fixedly sleeved on the outer surface of the first telescopic rod 23, and a scraping mechanism is provided on the crushing box 1.

[0039] The scraper mechanism includes a first transmission groove 31 opened on the crushing box 1, two second transmission grooves 32 are opened in the first transmission groove 31, a transmission column 33 is slidably connected in the second transmission groove 32, a scraper 34 is fixedly connected between the two transmission columns 33, a discharge groove 35 is opened in the first transmission groove 31, and one end of the transmission column 33 is fixedly connected to a transmission mechanism connected to the crushing box 1.

[0040] The transmission mechanism includes a transmission motor 41 fixedly connected to the crushing box 1. The transmission motor 41 is controlled by a PLC programming program, and the transmission motor 41 can be controlled to rotate forward and backward and rotate at an angle. The output end of the transmission motor 41 is fixedly connected to a first rotating shaft 42 through a coupling. The outer surface of the first rotating shaft 42 is fixedly sleeved with a first transmission gear 43, and the outer surface of the first transmission gear 43 is meshingly connected with a second transmission gear 44. The middle of the second transmission gear 44 is fixedly sleeved with a second rotating shaft 45 rotatably connected to the crushing box 1, and the outer surface of the second rotating shaft 45 is fixedly sleeved with two third transmission gears 46, and the outer surface of the third transmission gear 46 is meshingly connected with a transmission gear ring 47, and the inner surface of the transmission gear ring 47 is fixedly connected with a transmission ring 48 rotatably connected to the crushing box 1, and the transmission ring 48 is fixedly connected to the transmission column 33.

[0041] The transmission motor 41 drives the first rotating shaft 42 to rotate, the first rotating shaft 42 drives the second rotating shaft 45 to rotate through the first transmission gear 43 and the second transmission gear 44, the second rotating shaft 45 drives the transmission ring gear 47 to rotate through the third transmission gear 46, the transmission ring gear 47 drives the transmission ring 48 to rotate, and the transmission ring 48 drives the transmission column 33 to rotate.

[0042] After the ore is crushed by the crushing knife 8, it then enters the filter plate 22 under the action of gravity, and then the ore crushed materials are screened by the filter plate 22. At the same time, when the ore crushed materials enter the filter plate 22, due to the ore entering the filter plate 22 under the action of gravity, the impact force received is relatively large. At this time, the impact force of the crushed stone is buffered by the extension and contraction of the first telescopic rod 23 and the first spring 24, thereby reducing the damage to the filter plate 22 caused by the impact force, thereby increasing the service life of the filter plate 22. At the same time, the transmission column 33 is driven by the transmission mechanism to reciprocate in the second transmission groove 32. At this time, the transmission column 33 drives the scraper 34 to rotate, and at this time, the scraper 34 acts on the filter residue on the filter plate 22. The ore that comes down is scraped and scraped into the first transmission groove 31, driving the ore to move in the first transmission groove 31, and then discharged through the discharge groove 35 on the first transmission groove 31, and then the ore enters the crushing knife 8 for re-crushing, thereby realizing screening of the crushed ore, automatically screening out qualified ore for crushing, and automatically cleaning the ore filtered by the filter plate 22, so that the subsequent filter plate 22 can screen the subsequent crushed ore, and automatically send the unqualified ore retained after screening to the crushing knife 8 for re-crushing, thereby realizing full crushing of the ore, greatly improving the effect of ore crushing and the stability of crushing work.

[0043] A plurality of anti-collision rods 25 fixedly connected to the mounting grooves 21 are arranged above the filter plate 22 .

[0044] The anti-collision rod 25 is used to block larger ores to prevent the larger ores from damaging the filter plate 22 .

[0045] Embodiment 3

[0046] Based on Example 2, please refer to Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 7 and Figure 8 As shown, the dust removal mechanism includes a first transmission pipe 51 fixedly connected to the first mounting pipe 3, the first transmission pipe 51 is rotatably connected to the crushing box 1, one end of the first transmission pipe 51 is rotatably connected to a water supply mechanism, a plurality of water spray holes 52 are provided on the outer surface of the first mounting pipe 3, one end of the second mounting pipe 7 is fixedly connected to a second transmission pipe 53 rotatably connected to the crushing box 1, one end of the second transmission pipe 53 is rotatably connected to a first connecting pipe 54 fixedly connected to the crushing box 1, one end of the first connecting pipe 54 is fixedly connected to an air suction box 55 fixedly connected to the crushing box 1 through a pipeline, the air suction box 55 is rotatably connected to the first transmission pipe 51, a fan blade 56 is fixedly sleeved on the outer surface of the first transmission pipe 51, the outer surface of the air suction box 55 is fixedly connected to an air intake pipe 57 fixedly connected to the crushing box 1, a dust suction groove 58 is provided on the second mounting pipe 7, and an opening and closing mechanism is arranged in the dust suction groove 58.

[0047] The water supply mechanism includes a second connecting pipe 61 rotatably connected to the first transmission pipe 51 , the second connecting pipe 61 is fixedly connected to the suction box 55 , and one end of the second connecting pipe 61 is fixedly connected to a water pump 62 fixedly connected to the crushing box 1 through a pipeline.

[0048] By connecting external water to the water pump 62 through a pipeline, the water pump 62 then pumps water into the second connecting pipe 61 through the pipeline, and then the second connecting pipe 61 supplies water to the first transmission pipe 51 and the first installation pipe 3.

[0049] The opening and closing mechanism includes a transmission box 71 slidably connected to the dust suction groove 58, a plurality of ball bearings 72 are slidably connected in the transmission box 71, a stopper 73 slidably connected to the dust suction groove 58 is fixedly connected to one side of the transmission box 71, a through groove is provided on the stopper 73, a second telescopic rod 74 fixedly connected to the second mounting tube 7 is fixedly connected to the bottom of the transmission box 71 through a connecting block, a second spring 75 fixedly connected to the transmission box 71 is fixedly connected to the outer surface of the second telescopic rod 74, a plurality of dust suction holes 76 are provided in the dust suction groove 58, and a plurality of dredging rods 77 slidably connected to the dust suction holes 76 are fixedly connected to one side of the stopper 73.

[0050] When the ore is crushed, water is supplied to the first transmission pipe 51 and the first mounting pipe 3 through the water supply mechanism, and then the water in the first mounting pipe 3 is sprayed out through the water spray hole 52, and at the same time the first mounting pipe 3 rotates, driving the sprayed water to sprinkle into the crushing box 1, so as to reduce the dust generated in the crushing box 1. At the same time, during the rotational crushing, the first mounting pipe 3 drives the first transmission pipe 51 to rotate, and the first transmission pipe 51 drives the fan blades 56 to rotate in the suction box 55. At this time, the suction box 55 sucks air into the second mounting pipe 7 through the pipeline, the first connecting pipe 54, and the second transmission pipe 53. At the same time, the second mounting pipe 7 rotates, and the second mounting pipe 7 drives the transmission box 71 in the dust suction groove 58 to rotate. When the transmission box 71 rotates to the upper half of the second mounting pipe 7, the balls 72 in the transmission box 71 roll to the bottom of the transmission box 71 under the action of gravity, and the transmission box 71 moves downward under the action of gravity. At this time, the second telescopic When the dust suction hole 76 is blocked, the dust suction hole 76 is blocked and the dust suction hole 76 is blocked.

[0051] The working principle of the present invention is as follows: after the ore is crushed by the crushing knife 8, it then enters the filter plate 22 under the action of gravity, and then the ore crushed materials are screened by the filter plate 22. At the same time, when the ore crushed materials enter the filter plate 22, since the ore enters the filter plate 22 under the action of gravity, the impact force received is relatively large. At this time, the impact force of the crushed stone is buffered by the expansion and contraction of the first telescopic rod 23 and the first spring 24, thereby reducing the damage to the filter plate 22 caused by the impact force, and improving the service life of the filter plate 22. At the same time, the transmission column 33 is driven by the transmission mechanism to reciprocate in the second transmission groove 32, and at this time, the transmission column 33 drives the scraper 34 to rotate, and at this time, the scraper 34 has an impact on the filter plate 22. The ore retained by the upper filter is scraped and scraped into the first transmission groove 31, driving the ore to move in the first transmission groove 31, and then discharged through the discharge groove 35 on the first transmission groove 31, and then the ore enters the crushing knife 8 for re-crushing, thereby realizing screening of the crushed ore, automatically screening out qualified ore for crushing, and automatically cleaning the ore filtered by the filter plate 22, so that the subsequent filter plate 22 can screen the subsequent crushed ore, and automatically send the unqualified ore retained by the screening to the crushing knife 8 for re-crushing, thereby realizing full crushing of the ore, greatly improving the effect of ore crushing and the stability of crushing work.

[0052] When the ore is crushed, water is supplied to the first transmission pipe 51 and the first mounting pipe 3 through the water supply mechanism, and then the water in the first mounting pipe 3 is sprayed out through the water spray hole 52, and at the same time the first mounting pipe 3 rotates, driving the sprayed water to sprinkle into the crushing box 1, so as to reduce the dust generated in the crushing box 1. At the same time, during the rotational crushing, the first mounting pipe 3 drives the first transmission pipe 51 to rotate, and the first transmission pipe 51 drives the fan blades 56 to rotate in the suction box 55. At this time, the suction box 55 sucks air into the second mounting pipe 7 through the pipeline, the first connecting pipe 54, and the second transmission pipe 53. At the same time, the second mounting pipe 7 rotates, and the second mounting pipe 7 drives the transmission box 71 in the dust suction groove 58 to rotate. When the transmission box 71 rotates to the upper half of the second mounting pipe 7, the balls 72 in the transmission box 71 roll to the bottom of the transmission box 71 under the action of gravity, and the transmission box 71 moves downward under the action of gravity. At this time, the second telescopic When the dust suction hole 76 is blocked, the dust suction hole 76 is blocked and the dust suction hole 76 is blocked.

[0053] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A mechanical crushing device for mining ores, comprising a crushing box (1), characterized in that: A first mounting shaft (2) is rotatably connected to one side of the crushing box (1); a first mounting tube (3) rotatably connected to the crushing box (1) is fixedly connected to the first mounting shaft (2); a first gear (4) is fixedly sleeved on the outer surface of the first mounting shaft (2); two second gears (5) are meshingly connected to the outer surface of the first gear (4); a second mounting shaft (6) rotatably connected to the crushing box (1) is fixedly sleeved in the middle of the second gear (5); a second mounting tube (7) rotatably connected to the crushing box (1) is fixedly connected to one end of the second mounting shaft (6); a plurality of crushing knives (8) are fixedly connected to the outer surfaces of the first mounting tube (3) and the second mounting tube (7); a driving mechanism connected to the crushing box (1) is drivingly connected to the outer surface of the first mounting shaft (2); the driving mechanism is used to drive the first mounting shaft (2) to rotate; The crushing box (1) is provided with a screening and returning mechanism, which is used to screen the crushed ore and return the unqualified ore to the crushing knife (8) for re-crushing. The crushing box (1) is provided with a dust removal mechanism connected to the first mounting pipe (3) and the second mounting pipe (7), which is used to remove dust generated during crushing. The dust removal mechanism comprises a first transmission pipe (51) fixedly connected to the first mounting pipe (3), the first transmission pipe (51) being rotatably connected to the crushing box (1), one end of the first transmission pipe (51) being rotatably connected to a water supply mechanism, a plurality of water spray holes (52) being provided on the outer surface of the first mounting pipe (3), one end of the second mounting pipe (7) being fixedly connected to a second transmission pipe (53) rotatably connected to the crushing box (1), one end of the second transmission pipe (53) being rotatably connected to the first connection mechanism fixedly connected to the crushing box (1), and A connecting pipe (54), one end of the first connecting pipe (54) is fixedly connected to an air suction box (55) fixedly connected to the crushing box (1) through a pipeline, the air suction box (55) is rotatably connected to the first transmission pipe (51), a fan blade (56) is fixedly sleeved on the outer surface of the first transmission pipe (51), the outer surface of the air suction box (55) is fixedly connected to an air intake pipe (57) fixedly connected to the crushing box (1), and a dust suction groove (58) is opened on the second mounting pipe (7), and an opening and closing mechanism is arranged in the dust suction groove (58); The water supply mechanism comprises a second connecting pipe (61) rotatably connected to the first transmission pipe (51), the second connecting pipe (61) being fixedly connected to the air suction box (55), and one end of the second connecting pipe (61) being fixedly connected to a water pump (62) fixedly connected to the crushing box (1) via a pipeline; The opening and closing mechanism comprises a transmission box (71) slidably connected to the dust suction groove (58), a plurality of balls (72) are slidably connected in the transmission box (71), a stopper (73) slidably connected to the dust suction groove (58) is fixedly connected to one side of the transmission box (71), a through groove is provided on the stopper (73), a second telescopic rod (74) fixedly connected to the second mounting tube (7) is fixedly connected to the bottom of the transmission box (71) through a connecting block, a second spring (75) fixedly connected to the transmission box (71) is fixedly connected to the outer surface of the second telescopic rod (74), a plurality of dust suction holes (76) are provided in the dust suction groove (58), and a plurality of dredging rods (77) slidably connected to the dust suction holes (76) are fixedly connected to one side of the stopper (73).

2. A mechanical crushing device for mining ore according to claim 1, characterized in that: The screening and returning mechanism comprises a mounting groove (21) provided on a crushing box (1), a filter plate (22) being slidably connected in the mounting groove (21), a first telescopic rod (23) being fixedly connected to one side of the filter plate (22) and being fixedly connected to the mounting groove (21), a first spring (24) being fixedly connected to the outer surface of the first telescopic rod (23) and being fixedly sleeved to the mounting groove (21), and a scraping mechanism being provided on the crushing box (1).

3. A mechanical crushing device for mining ore according to claim 2, characterized in that: The scraper mechanism comprises a first transmission groove (31) provided on the crushing box (1), two second transmission grooves (32) provided in the first transmission groove (31), a transmission column (33) slidably connected in the second transmission groove (32), a scraper (34) fixedly connected between the two transmission columns (33), a discharge groove (35) provided in the first transmission groove (31), and a transmission mechanism connected to the crushing box (1) fixedly connected at one end of the transmission column (33).

4. A mechanical crushing device for mining ore according to claim 3, characterized in that: The transmission mechanism comprises a transmission motor (41) fixedly connected to the crushing box (1); the output end of the transmission motor (41) is fixedly connected to a first rotating shaft (42) through a coupling; the outer surface of the first rotating shaft (42) is fixedly sleeved with a first transmission gear (43); the outer surface of the first transmission gear (43) is meshingly connected with a second transmission gear (44); the middle of the second transmission gear (44) is fixedly sleeved with a second rotating shaft (45) rotatably connected to the crushing box (1); the outer surface of the second rotating shaft (45) is fixedly sleeved with two third transmission gears (46); the outer surface of the third transmission gear (46) is meshingly connected with a transmission gear ring (47); the inner surface of the transmission gear ring (47) is fixedly connected with a transmission ring (48) rotatably connected to the crushing box (1); and the transmission ring (48) is fixedly connected to a transmission column (33).

5. A mechanical crushing device for mining ore according to claim 2, characterized in that: A plurality of anti-collision rods (25) fixedly connected to the mounting grooves (21) are arranged above the filter plate (22).

6. A mechanical crushing device for mining ore according to claim 1, characterized in that: The driving mechanism comprises a driving motor (81) fixedly connected to the crushing box (1); an output end of the driving motor (81) is fixedly connected to a driving shaft (82) via a coupling; and an outer surface of the driving shaft (82) is fixedly sleeved with a first driving gear (83) meshingly connected to a first gear (4).

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