Multi-stage crushing equipment

Abstract

The utility model relates to the field of ore processing, and discloses a multistage crushing device which comprises a box body, a sealing block, a sprue spreader and a box door, a feeding port is formed in the center of the upper end face of the box body, and a protective shell is fixedly arranged at the position, close to the upper end, of the center of one side of the outer wall of the box body. A first motor is fixedly arranged at the position, close to one side, of the center of the lower end face of the inner wall of the protective shell, and a transmission mechanism is fixedly arranged at the output end of the first motor and comprises a positioning block, a large bevel gear, two small bevel gears and two double-face bevel gears. Crushing mechanisms are rotationally arranged at the positions, close to the front end and the rear end, of the upper ends of the two sides of the inner wall of the box body correspondingly, and each crushing mechanism comprises a rotating shaft and a plurality of crushing wheels. According to the mineral powder collecting device, dust in the box body is isolated and collected in a centralized mode through the sealing block and the air pump, and the effect of collecting mineral powder in the grinding opening without shutdown can be achieved through the discharging channel and the threaded groove formed in the crushing cone.

Description

Technical Field

[0001] The utility model relates to the field of ore processing, in particular to a multi-stage crushing device. Background Art

[0002] Sintering refers to the process of mixing various powdered iron-containing raw materials with appropriate amounts of fuel and flux, adding appropriate amounts of water, mixing and pelletizing, and then subjecting the materials to a series of physical and chemical changes on sintering equipment to bond the mineral powder particles into blocks. The mined ore needs to be crushed before the sintering process, so a multi-stage crushing equipment is required.

[0003] When traditional multi-stage crushing equipment crushes ore, a large amount of smoke and dust will be generated to pollute the working environment due to the squeezing and collision of the crushing shaft on the ore. In addition, after the common multi-stage crushing equipment grinds the ore into powder, it is necessary to pour out the ore powder in the receiving box before the next grinding, which is a waste of time. Therefore, the utility model provides a multi-stage crushing equipment to solve the problems raised in the above background technology. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings existing in the prior art, and a multi-stage crushing equipment is proposed. After feeding, the multi-stage crushing equipment can make the sealing block rebound to seal the feeding port through the design of the second spring and the third telescopic rod to prevent smoke and dust from escaping outside the equipment, and then the smoke and dust are sucked into the dust collecting bin for collection through the air pump. After the crushing is completed, the motor can be reversed to make the thread on the grinding cone bring the ground mineral powder out of the grinding port and throw it into the discharge port along the discharge channel for collection, thereby reducing the time wasted in stopping the machine to collect the mineral powder in the grinding port.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: comprising a box body, a sealing block, a diverter cone and a box door, a feed port is provided at the center of the upper end surface of the box body, a protective shell is fixedly provided at the center of one side of the outer wall of the box body near the upper end, a No. 1 motor is fixedly provided at the center of the lower end surface of the inner wall of the protective shell near one side, a transmission mechanism is fixedly provided at the output end of the No. 1 motor, the transmission mechanism comprises a positioning block, a large bevel gear, two small bevel gears and two double-sided bevel gears, crushing mechanisms are rotatably provided at the upper ends of both sides of the inner wall of the box body near the front and rear ends, the two crushing mechanisms each comprise a rotating shaft and a plurality of crushing wheels, fixed blocks are fixedly provided at the lower ends of both sides of the diverter cone, a No. 2 motor is fixedly provided at the center of the lower end surface of the diverter cone, and a transmission rod is fixedly provided at the output end of the No. 2 motor;

[0006] A crushing cone is fixedly provided on the lower end surface of the transmission rod, a threaded groove is provided on the outer wall of the crushing cone, a control box is fixedly provided at the center of the bottom end surface of the inner wall of the box body, a hydraulic rod is fixedly provided at the output end of the control box, a No. 1 telescopic rod is fixedly provided near the four corners on the upper end surface of the control box, a mounting seat is fixedly provided on the upper end surfaces of the four No. 1 telescopic rods, a crushing seat is clamped in the mounting seat, a dust collecting bin is fixedly provided at the center of the lower end of one side of the box body, an air pump is fixedly provided at the center of one side of the upper end surface of the dust collecting bin, a dust exhaust port is provided at the center of the lower end of one side of the dust collecting bin, a sealing cover is movably sleeved on one side of the dust exhaust port, a material discharge port is provided at the center of the other side of the box body, and a material discharge plate is embedded in the center of the other side of the box body;

[0007] Through the above technical scheme, the design of the protective shell is convenient for installing and supporting the No. 1 motor and the transmission mechanism. The two crushing mechanisms can rotate in opposite directions under the action of the transmission mechanism to perform preliminary extrusion and crushing on the fallen ore. The design of the diverter cone can divert the crushed ore to prevent the crushed ore from falling directly to the crushing cone and affecting the working life of the crushing cone. At the same time, it provides a supporting and fixed space for the No. 2 motor, and the No. 2 motor can provide rotational power for the crushing cone. The design of the control box is convenient for controlling the extension and retraction of the hydraulic rod. At the same time, the design of multiple No. 1 telescopic rods prevents the horizontal shaking of the mounting base from causing pressure on the hydraulic rod, thereby reducing the life of the hydraulic rod. The design of the dust collecting bin is convenient for sucking the dust in the multi-stage crushing equipment into the dust collecting bin through an air pump for centralized storage, preventing the internal dust from escaping into the working environment when the equipment is opened, posing a threat to the health of the staff. The design of the dust exhaust port and the sealing cover is convenient for cleaning the dust in the dust collecting bin, and the design of the discharge plate can prevent small pieces of ore that have not been ground from flowing directly out along the discharge port.

[0008] Further, the large bevel gear is fixedly arranged at the output end of the No. 1 motor, the positioning block is fixedly arranged at the center of the bottom end surface of the inner wall of the protective shell, a rotating rod is penetrated by the center of the front and rear end surfaces of the positioning block near the upper end, the two double-sided bevel gears are respectively fixedly arranged at the center of the outer wall of the rotating rod near both sides, the two small bevel gears are respectively fixedly arranged at the center of one side of the two rotating shafts, the two small bevel gears are respectively meshed with the two double-sided bevel gears, and the large bevel gear is meshed with the two double-sided bevel gears;

[0009] Through the above technical scheme, the design of the positioning block makes it easy to fix the position of the two double-sided bevel gears by rotating the rod without affecting the rotation of the two double-sided bevel gears. The design of the large bevel gear makes it easy to provide rotational power to the two double-sided bevel gears. Through the different meshing methods of the two double-sided bevel gears and the two small bevel gears, the two double-sided bevel gears drive the two crushing mechanisms to rotate in opposite directions, thereby squeezing and crushing the large ore that falls above the two crushing mechanisms.

[0010] Furthermore, one side of the two rotating shafts is respectively rotatably arranged on the upper end of one side of the inner wall of the box body near the front and rear ends, and the other side of the two rotating shafts is respectively penetrated and arranged on the upper end of the other side of the inner wall of the box body near the front and rear ends, and the plurality of crushing wheels are respectively staggered and fixedly arranged on the outer walls of the two rotating shafts;

[0011] Through the above technical solution, multiple staggered and fixed crushing wheels can effectively crush the ore. The design of the rotating shaft makes it easy to provide rotational power to the crushing wheel through a small bevel gear fixed on one side, and at the same time makes it easy to fix the positions of the two crushing mechanisms.

[0012] Furthermore, a discharging channel is provided at the center of the outer wall of one side of the mounting seat and the crushing seat, the upper end surface of the crushing seat is recessed at the center, a grinding opening is provided at the center of the upper end surface of the crushing seat, a handle is fixedly provided at the center of the front end surface of the crushing seat, a clamping groove is provided at the lower end of both sides of the outer wall of the crushing seat near the rear end, a No. 2 telescopic rod is fixedly provided at the center of one side of the inner wall of the two clamping grooves, and a No. 1 spring is fixedly sleeved on the outer walls of the two No. 2 telescopic rods;

[0013] Through the above technical scheme, the design of the discharge channel makes it convenient for the mineral powder thrown out by the crushing cone to be thrown into the discharge port along the discharge channel for collection and processing. The design of the upper end surface of the crushing seat facing the middle depression makes it convenient for the crushed stone falling from above to fall into the grinding port along the depression for grinding. The design of the handle makes it convenient to remove the crushing seat. The design of the clamping groove makes it convenient to fix the No. 2 telescopic rod, No. 1 spring and the clamping block. The No. 2 telescopic rod is convenient to cooperate with the No. 1 spring to control the extension and retraction of the clamping block. The design of the clamping hole makes it convenient to clamp and fix the position of the mounting seat and the crushing seat through the clamping block. The clamping groove opened on one side of the outer wall of the box body makes it convenient to adjust the telescopic length of the clamping block on the outside, so as to remove the crushing seat.

[0014] Furthermore, a rebound groove is provided at the center of the upper end surface of the inner wall of the box body near both sides, a fixing plate is fixedly provided at both sides of the sealing block near the lower end, a No. 3 telescopic rod is fixedly provided at the upper end surface of the two fixing plates near one side, a No. 2 spring is fixedly sleeved on the outer walls of the two No. 3 telescopic rods, and the upper end surfaces of the two No. 3 telescopic rods are respectively fixedly provided at the center of the upper end surfaces of the inner walls of the two rebound grooves;

[0015] Through the above technical scheme, the design of the rebound groove is convenient for fixing the position of the No. 3 telescopic rod and the No. 2 spring, the design of the fixed plate is convenient for connecting the No. 3 telescopic rod and the sealing block, and the design of the No. 3 telescopic rod and the No. 2 spring is convenient for driving the sealing block to rebound upward without affecting the unloading of materials, so as to facilitate the blocking of the feed port and prevent the dust in the equipment from escaping into the working environment.

[0016] Furthermore, a slide groove is provided through the front end of one side of the box body near the upper and lower ends, and a slider is fixedly provided at the upper and lower ends of the rear end surface of the box door, and the box door is slidably provided on the front end surface of the box body through the slider and the slide groove;

[0017] Through the above technical solution, the design of the slide groove is convenient for the slider to be embedded, and the position of the box door is fixed and slid by the design of the slider moving in the slide groove, so that the box door can be removed conveniently for inspection and maintenance of the interior of the multi-stage crushing equipment.

[0018] Furthermore, pipes are fixedly arranged on both sides of the air pump, and the two pipes are respectively arranged at the center of one side of the inner wall of the box and at the upper end of the center of one side of the dust collecting bin, and the bottom end of the inner wall of the dust collecting bin is inclined toward the dust discharge port;

[0019] Through the above technical solution, the pipeline makes it convenient for the air pump to suck the dust in the box into the dust collecting bin, and the design of the bottom end of the inner wall of the dust collecting bin tilted towards the dust exhaust port facilitates cleaning of the dust collecting bin along the dust exhaust port.

[0020] The utility model has the following beneficial effects:

[0021] 1. The utility model proposes a multi-stage crushing equipment. When ore is put into the box body along the feed inlet, the weight of the ore presses the sealing block downward, so that the No. 2 spring is tightened and the No. 3 telescopic rod is extended. When the ore falls along the slopes on both sides of the sealing block, the elastic force generated by the No. 2 spring drives the sealing block to move upward to block the feed inlet, preventing the dust generated during crushing from escaping to the outside along the feed inlet. At the same time, the dust generated in the box body is sucked into the dust collecting bin for centralized treatment through an air pump, preventing the dust from escaping to the outside when the box door is opened.

[0022] 2. The utility model proposes a multi-stage crushing equipment. After the grinding cone grinds the crushed ore into powder, the second motor is reversed to make the grinding cone reverse, and the mineral powder in the grinding port is thrown out of the grinding port through the threaded groove opened on the outer wall of the grinding cone. The design of the discharge channel allows the thrown mineral powder to enter the discharge port along the discharge channel, reducing the time wasted on stopping to collect the mineral powder in the grinding port, thereby improving the working efficiency of the multi-stage crushing equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an overall axonometric schematic diagram of the utility model;

[0024] Figure 2 It is a front cross-sectional schematic diagram of the utility model;

[0025] Figure 3 This is a schematic diagram of the card slot position of the utility model;

[0026] Figure 4 It is an axonometric schematic diagram of the diverter cone of the utility model;

[0027] Figure 5 This is a schematic diagram of the combination of the mounting seat and the crushing seat of the utility model;

[0028] Figure 6 This is an axonometric schematic diagram of the crushing seat of the utility model;

[0029] Figure 7 This is an axonometric schematic diagram of the mounting seat of the utility model;

[0030] Figure 8 It is a front cross-sectional schematic diagram of the mounting seat of the utility model;

[0031] Fig. 9 This is an axonometric schematic diagram of the sealing block of the utility model;

[0032] Fig.10 For the utility model Figure 2 A is an enlarged schematic diagram;

[0033] Fig.11 For the utility model Figure 1 The enlarged schematic diagram of point B in FIG.

[0034] Fig.12 This is an axonometric schematic diagram of the crushing mechanism of the utility model;

[0035] Fig.13 It is a detailed schematic diagram of the discharge plate and the discharge port of the utility model;

[0036] Fig.14 It is a top view schematic diagram of the transmission mechanism of the utility model.

[0037] Legend:

[0038] 1. Box body; 2. Feeding port; 3. Transmission mechanism; 4. Protective shell; 5. No. 1 motor; 6. Crushing mechanism; 7. Diverter cone; 8. No. 2 motor; 9. Transmission rod; 10. Discharging port; 11. Crushing cone; 12. Mounting seat; 13. Crushing seat; 14. Air pump; 15. Dust collecting bin; 16. Dust discharge port; 17. Sealing cover; 18. No. 1 telescopic rod; 19. Control box; 20. Hydraulic rod; 21. Box door; 22. Card slot; 23. Card block; 24. Fixed block; 25. Handle ; 26. Grinding mouth; 27. Discharge channel; 28. Snap-in hole; 29. ​​Snap-in groove; 30. Spring No. 1; 31. Telescopic rod No. 2; 32. Sealing block; 33. Fixed plate; 34. Spring No. 2; 35. Telescopic rod No. 3; 36. Rebound groove; 37. Slide groove; 38. Sliding block; 39. Discharge plate; 301. Small bevel gear; 302. Rotating rod; 303. Double-sided bevel gear; 304. Large bevel gear; 305. Positioning block; 601. Rotating shaft; 602. Crushing wheel. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] Example

[0041] Reference Figure 1-14 , an embodiment provided by the utility model includes a box body 1, a sealing block 32, a diverter cone 7 and a box door 21, a feed port 2 is provided at the center of the upper end surface of the box body 1, a protective shell 4 is fixedly provided at the center of one side of the outer wall of the box body 1 near the upper end, a No. 1 motor 5 is fixedly provided at the center of the lower end surface of the inner wall of the protective shell 4 near one side, a transmission mechanism 3 is fixedly provided at the output end of the No. 1 motor 5, the transmission mechanism 3 includes a positioning block 305, a large bevel gear 304, two small bevel gears 301 and two double-sided bevel gears 303, and crushing mechanisms 6 are rotatably provided at the upper ends of both sides of the inner wall of the box body 1 near the front and rear ends, and the two crushing mechanisms 6 can rotate in opposite directions under the action of the transmission mechanism 3 to perform preliminary extrusion and crushing on the fallen ore;

[0042] The two crushing mechanisms 6 each include a rotating shaft 601 and a plurality of crushing wheels 602. Fixed blocks 24 are fixedly arranged at the lower ends of both sides of the diverter cone 7. The design of the diverter cone 7 can divert the crushed ore to prevent the crushed ore from falling directly to the crushing cone 11, which affects the working life of the crushing cone 11. At the same time, a supporting and fixing space is provided for the No. 2 motor 8. The No. 2 motor 8 is fixedly arranged at the center of the lower end surface of the diverter cone 7. The No. 2 motor 8 can provide rotational power for the crushing cone 11. A transmission rod 9 is fixedly arranged at the output end of the No. 2 motor 8.

[0043] A crushing cone 11 is fixedly provided on the lower end surface of the transmission rod 9, and a threaded groove is provided on the outer wall of the crushing cone 11. A control box 19 is fixedly provided at the center of the bottom end surface of the inner wall of the box body 1. The design of the control box 19 is convenient for controlling the extension and retraction of the hydraulic rod 20. The hydraulic rod 20 is fixedly provided at the output end of the control box 19. A No. 1 telescopic rod 18 is fixedly provided near the four corners of the upper end surface of the control box 19. The design of multiple No. 1 telescopic rods 18 prevents the horizontal shaking of the mounting seat 12 from causing pressure on the hydraulic rod 20, thereby reducing the life of the hydraulic rod 20. The upper end surfaces of the four No. 1 telescopic rods 18 are fixedly provided with mounting seats 12, and a crushing seat 13 is clamped in the mounting seat 12. A dust collecting bin 15 is fixedly provided at the center of the lower end of one side of the box body 1;

[0044] The design of the dust collecting bin 15 facilitates the dust in the multi-stage crushing equipment to be sucked into the dust collecting bin 15 for centralized storage through the air pump 14. The air pump 14 is fixedly arranged at the center of one side of the upper end surface of the dust collecting bin 15. A dust exhaust port 16 is opened at the center of the lower end of one side of the dust collecting bin 15. A sealing cover 17 is movably sleeved on one side of the dust exhaust port 16. The design of the dust exhaust port 16 and the sealing cover 17 facilitates the cleaning of the dust in the dust collecting bin 15. A discharge port 10 is opened at the center of the other side of the box body 1. A discharge plate 39 is embedded in the center of the other side of the box body 1. The design of the discharge plate 39 can prevent small pieces of ore that have not been ground from flowing out directly along the discharge port 10.

[0045] When in use, first start the No. 1 motor 5, and then pour the ore into the box body 1 along the feed port 2. The weight of the ore presses the sealing block 32 downward, and the fixing plates 33 fixed at the centers of both sides of the sealing block 32 move downward, so that the No. 2 spring 34 is tightened and the No. 3 telescopic rod 35 is extended. When the ore falls along the slopes on both sides of the sealing block 32, the elastic force generated by the No. 2 spring 34 drives the sealing block 32 to move upward along the rebound groove 36 to block the feed port 2, and the dust generated by the ore crushing is isolated in the box body 1. After the ore enters the box body 1, it falls on the two crushing mechanisms 6, and the No. 1 motor 5 drives the two double-sided bevel gears 304 through the large bevel gear 304. 03 rotates along the rotating rod 302, and drives the two rotating shafts 601 and multiple crushing wheels 602 to rotate in opposite directions through the two small bevel gears 301 meshing therewith, and performs preliminary extrusion and crushing on the ore on the two crushing mechanisms 6. The crushed ore falls to the surroundings along the diversion cone 7, and falls into the grinding port 26 through the depression on the upper end surface of the crushing seat 13. Then, the control box 19 is started to drive the mounting seat 12 and the crushing seat 13 to move upward through the hydraulic rod 20, and then the No. 2 motor 8 is started to drive the crushing cone 11 through the transmission rod 9 to grind the small pieces of ore in the grinding port 26. At the same time, the air pump 14 is started to draw the dust in the box body 1 into the dust collecting bin 15;

[0046] After grinding is completed, the discharge plate 39 is moved upward, and then the crushing cone 11 is reversed by reversing the second motor 8, and the ore powder in the grinding port 26 is thrown out of the grinding port 26 by using the threaded groove on the outer wall of the crushing cone 11. The thrown ore powder enters the discharge port 10 along the discharge channel 27 through the design of the discharge channel 27, which reduces the time wasted by stopping the machine to collect the ore powder in the grinding port 26, thereby improving the working efficiency of the multi-stage crushing equipment. After the work is completed, the ore powder is discharged along the slide groove 37 and the slider 3 8 Slide the box door 21 to one side, remove the box door 21, press the two clamping blocks 23 to the opposite side, so that the clamping blocks 23 are disengaged from the clamping slots 22 and the clamping holes 28, compress the No. 1 spring 30 and the No. 2 telescopic rod 31 and embed them into the clamping slots 29, then hold the handle 25 to pull out the crushing seat 13 to the outside, clean the mineral powder remaining in the crushing seat 13, and then pull out the sealing cover 17 movably sleeved on the dust outlet 16 to one side to clean the powder collected in the dust collecting bin 15.

[0047] Working principle: After the ore is initially crushed by the crushing mechanism 6, it is ground into powder for the second time by the crushing cone 11, which reduces the wear of the crushing cone 11 and improves the fineness of the ore crushing. The dust in the box body 1 is isolated and collected by the sealing block 32 and the air pump 14. The design of the discharge channel 27 and the threaded groove on the crushing cone 11 achieves the effect of avoiding shutdown to collect the ore powder in the grinding port 26.

[0048] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-stage crushing device, comprising a housing (1), a sealing block (32), a diverter cone (7) and a housing door (21), characterized in that: A feed port (2) is provided at the center of the upper end surface of the box body (1); a protective shell (4) is fixedly provided at the center of one side of the outer wall of the box body (1) near the upper end; a No. 1 motor (5) is fixedly provided at the center of the lower end surface of the inner wall of the protective shell (4) near one side; a transmission mechanism (3) is fixedly provided at the output end of the No. 1 motor (5); the transmission mechanism (3) comprises a positioning block (305), a large bevel gear (304), two small bevel gears (301) and two double-sided bevel gears (303); crushing mechanisms (6) are rotatably provided at the upper ends of both sides of the inner wall of the box body (1) near the front and rear ends; the two crushing mechanisms (6) each comprise a rotating shaft (601) and a plurality of crushing wheels (602); fixed blocks (24) are fixedly provided at the lower ends of both sides of the diverter cone (7); a No. 2 motor (8) is fixedly provided at the center of the lower end surface of the diverter cone (7); a transmission rod (9) is fixedly provided at the output end of the No. 2 motor (8); A crushing cone (11) is fixedly arranged on the lower end surface of the transmission rod (9), and a threaded groove is provided on the outer wall of the crushing cone (11). A control box (19) is fixedly arranged at the center of the bottom end surface of the inner wall of the box body (1), and a hydraulic rod (20) is fixedly arranged at the output end of the control box (19). A No. 1 telescopic rod (18) is fixedly arranged near the four corners on the upper end surface of the control box (19), and a mounting seat (12) is fixedly arranged on the upper end surface of the four No. 1 telescopic rods (18), and the mounting seat (12) is internally engaged with the hydraulic rod (20). A crushing seat (13) is provided, a dust collecting bin (15) is fixedly provided at the center of one side of the box body (1) near the lower end, an air pump (14) is fixedly provided at the center of one side of the upper end surface of the dust collecting bin (15), a dust discharge port (16) is provided at the center of one side of the dust collecting bin (15) near the lower end, a sealing cover (17) is movably sleeved on one side of the dust discharge port (16), a discharge port (10) is provided at the center of the other side of the box body (1), and a discharge plate (39) is embedded at the center of the other side of the box body (1).

2. A multi-stage crushing device according to claim 1, characterized in that: The large bevel gear (304) is fixedly arranged at the output end of the first motor (5), the positioning block (305) is fixedly arranged at the center of the bottom end surface of the inner wall of the protective shell (4), and a rotating rod (302) is penetrated by the center of the front and rear end surfaces of the positioning block (305) near the upper end, the two double-sided bevel gears (303) are respectively fixedly arranged at the center of the outer wall of the rotating rod (302) near both sides, the two small bevel gears (301) are respectively fixedly arranged at the center of one side of the two rotating shafts (601), the two small bevel gears (301) are respectively meshed with the two double-sided bevel gears (303), and the large bevel gear (304) is meshed with the two double-sided bevel gears (303).

3. A multi-stage crushing equipment according to claim 1, characterized in that: One side of the two rotating shafts (601) is rotatably arranged on the upper end of one side of the inner wall of the box body (1) near the front and rear ends, and the other side of the two rotating shafts (601) is penetrated and arranged on the upper end of the other side of the inner wall of the box body (1) near the front and rear ends, and the plurality of crushing wheels (602) are staggered and fixedly arranged on the outer walls of the two rotating shafts (601).

4. A multi-stage crushing device according to claim 1, characterized in that: A discharge channel (27) is provided at the center of the outer wall of one side of the mounting seat (12) and the crushing seat (13), the upper end surface of the crushing seat (13) is recessed toward the center, a grinding opening (26) is provided at the center of the upper end surface of the crushing seat (13), a handle (25) is fixedly provided at the center of the front end surface of the crushing seat (13), a clamping groove (29) is provided at the lower end of both sides of the outer wall of the crushing seat (13) near the rear end, a second telescopic rod (31) is fixedly provided at the center of one side of the inner wall of the two clamping grooves (29), and the outer walls of the two second telescopic rods (31) are fixedly sleeved with a first spring (30); A clamping block (23) is fixedly provided on one side of the two second telescopic rods (31) that are separated from each other. A clamping hole (28) is provided at the lower end of both sides of the outer wall of the mounting seat (12) near the rear end. The two clamping blocks (23) are respectively movably clamped in the two clamping holes (28). The crushing cone (11) is embedded in the grinding opening (26). A clamping groove (22) is provided at the center of one side of the outer wall of the box body (1) near the lower end near the rear end. The clamping block (23) is slidably arranged in the clamping groove (22).

5. The multi-stage crushing equipment according to claim 1, characterized in that: The box body (1) is provided with a rebound groove (36) at the center of the upper end surface of the inner wall near both sides, and the sealing block (32) is fixedly provided with a fixing plate (33) at the lower end of both sides, and a No. 3 telescopic rod (35) is fixedly provided at the upper end surface of the two fixing plates (33) near one side, and the outer walls of the two No. 3 telescopic rods (35) are fixedly sleeved with a No. 2 spring (34), and the upper end surfaces of the two No. 3 telescopic rods (35) are respectively fixedly provided at the center of the upper end surfaces of the inner walls of the two rebound grooves (36).

6. The multi-stage crushing equipment according to claim 1, characterized in that: A slide groove (37) is provided through the front end of one side of the box body (1) near the upper and lower ends, and a slider (38) is fixedly provided at the upper and lower ends of the rear end surface of the box door (21), and the box door (21) is slidably arranged on the front end surface of the box body (1) through the slider (38) and the slide groove (37).

7. The multi-stage crushing equipment according to claim 1, characterized in that: Pipes are fixedly arranged on both sides of the air pump (14), and the two pipes are respectively arranged to penetrate the center of one side of the inner wall of the box body (1) and the center of one side of the dust collecting bin (15) close to the upper end, and the bottom end of the inner wall of the dust collecting bin (15) is inclined toward the dust discharge port (16).

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