CN108927259B

CN108927259B - Multistage ore crusher of dustproof function

Info

Publication number: CN108927259B
Application number: CN201810963294.6A
Authority: CN
Inventors: 不公告发明人
Original assignee: Yichang Huaxi Mining Co ltd
Current assignee: Yichang Huaxi Mining Co.,Ltd.
Priority date: 2018-08-22
Filing date: 2018-08-22
Publication date: 2020-07-17
Anticipated expiration: 2038-08-22
Also published as: CN108927259A

Abstract

The invention discloses a multistage ore crusher with a dustproof function, which comprises a shell, wherein a hydraulic cylinder is fixed on the shell through a bolt and is welded and connected with a crushing disc, the shell is welded and connected with supporting legs, meanwhile, the shell is welded and connected with a feeding pipe and a discharging pipe and is communicated with the feeding pipe and the discharging pipe, the crushing disc is positioned inside the shell, crushing teeth are uniformly distributed on the crushing disc, a material collecting hopper is arranged right below the crushing disc, the outer wall of the material collecting hopper is welded on a first transmission ring, the material collecting hopper is welded and connected with a transmission seat, the first transmission ring is welded on the inner wall of the shell, the first transmission ring is welded and communicated with an air inlet pipe, and a high-pressure fan is fixed on the air inlet pipe through a bolt. This multistage ore crusher of dustproof function is provided with air-supply line and high pressure positive blower, smashes and can go on in step with preventing dust and stop, and is dustproof effectual, avoids high pressure positive blower to open simultaneously, causes the energy extravagant, has played energy saving and emission reduction's purpose, is favorable to using widely.

Description

Multistage ore crusher of dustproof function

Technical Field

The invention relates to the technical field of mechanical equipment, in particular to a multistage ore crusher with a dustproof function.

Background

After the ore is mined, the ore needs to be crushed, so that the ore can be applied to different engineering sites, the existing ore can generate a large amount of dust when being crushed, the dust can fly into the air, the health of people is further harmed, meanwhile, the ore is crushed only once, the crushing effect is poor, the practicability is not strong, the use requirements of people cannot be met, in view of the defects existing in the prior art, the ore is necessary to be further improved, the ore is enabled to have more practicability, and the practical use condition can be met.

Disclosure of Invention

The invention aims to provide a multistage ore crusher with a dustproof function, which aims to solve the problems that a large amount of dust is generated when the conventional ore is crushed, the dust is dispersed into the air and further harms the health of people, and meanwhile, the crushing effect is poor and the practicability is not high because only one-time crushing is performed during the crushing.

In order to achieve the purpose, the invention provides the following technical scheme: a multistage ore crusher with a dustproof function comprises a shell, wherein a hydraulic cylinder is fixed on the shell through bolts and is in welded connection with a crushing disc, the shell is in welded connection with supporting legs, the shell is in welded connection and communicated with an inlet pipe and a discharge pipe simultaneously, the crushing disc is positioned inside the shell, crushing teeth are uniformly distributed on the crushing disc, a collecting hopper is arranged under the crushing disc, the outer wall of the collecting hopper is welded on a first transmission ring and is in welded connection with a transmission seat, the first transmission ring is welded on the inner wall of the shell and is communicated with an air inlet pipe, a high-pressure fan is fixed on the air inlet pipe through bolts, a microswitch is fixed on the inner wall of the first transmission ring through bolts, the microswitch is connected with a power line and is in wire connection with the high-pressure fan, the transmission seat extends to the inside of the first transmission ring, the outer wall of the first transmission ring at the transmission seat is inwards recessed to form a notch, a sliding rod penetrates through the transmission seat outside the first transmission ring, a fixed vertical rod and a connecting seat are respectively welded on the top end surface and the bottom end surface of the transmission seat inside the first transmission ring, a sealing seat is welded at the top end of the fixed vertical rod and is welded with a pressing plate, a through hole is formed in the first transmission ring wall body attached to the top end surface of the sealing seat, the fixed vertical rod is movably connected with the sealing ring through a linear ball bearing, the sealing ring is welded on the inner wall of the first transmission ring, an elastic spring is sleeved on the fixed vertical rod between the sealing ring and the sealing seat, the elastic spring, the sealing ring and the sealing seat are welded, a transmission rod is welded on the bottom end surface of the connecting seat, and the transmission rod extends to the inside of the second transmission ring, through rotatory ball bearing swing joint between second transmission ring and first crushing roller and the second crushing roller, and the second transmission ring welds on the inner wall of casing to inside worm and the worm wheel of being provided with of second transmission ring, worm wheel and output lever welded connection, and output lever and worm all with the second transmission ring inner wall between through rotatory ball bearing swing joint.

Preferably, the crushing disc and the collecting hopper are of a circular truncated cone-shaped structure, the diameter of the top end surface of the crushing disc is smaller than that of the top end surface of the collecting hopper, the top end and the bottom end of the collecting hopper are both in an open shape, and meanwhile, the collecting hopper and the crushing disc are made of alloy steel.

Preferably, first drive ring and second drive ring are hollow ring structure, and first drive ring top surface is unanimous with horizontal plane contained angle and inlet pipe inclination to the diameter of the distribution arc length of the through-hole on first drive ring top surface is greater than the diameter of discharging pipe.

Preferably, the transmission seat and the transmission rod are distributed in an annular array manner, and the notch wall bodies on two sides of the transmission seat are embedded into the transmission seat.

Preferably, seal receptacle, sealing ring and connecting seat all are the ring form structure, and the clamp plate on the seal receptacle is located micro-gap switch's button directly over.

Preferably, the transmission rod is movably connected with the second transmission ring through a linear ball bearing, the transmission rod extends into the hollow worm, the surface of the transmission rod in the second transmission ring and the inner wall of the worm are both in a thread shape, and the second transmission ring is in threaded connection with the worm.

Preferably, the first crushing roller and the second crushing roller are distributed in a staggered manner, the first crushing roller and the second crushing roller are horizontally arranged, and the first crushing roller and the second crushing roller are of a hollow structure.

Preferably, the number of the first crushing roller and the second crushing roller is 2, and output rods are inserted into the 2 first crushing rollers and the 2 second crushing rollers, and worm gears on the output rods are meshed with worms.

Preferably, the output rod extends to the inside of the first crushing roller and the second crushing roller respectively, a sun gear and a gear carrier are welded on the output rod, gear rings are welded on the inner walls of the first crushing roller and the second crushing roller, the gear carrier is in shaft connection with a planetary gear, the planetary gear is meshed with the sun gear and the gear rings, the planetary gear, the sun gear and the gear rings are matched with the gear carrier to form a planetary speed reduction structure, and multiple groups of the mechanism are distributed at equal intervals.

Compared with the prior art, the invention has the beneficial effects that: the multistage ore crusher with the dustproof function is provided with the air inlet pipe and the high-pressure fan, when ores fall onto the collecting hopper, the crushing disc extrudes and crushes the ores, at the moment, the high-pressure fan starts to work, at the moment, high-speed airflow can be sprayed out from the joint of the feeding pipe and the shell, and thus the highly-sprayed airflow forms an air wall to prevent dust from drifting out, and when the ores fall into the second transmission ring after being crushed by the crushing disc, the ores can pass through the double crushing of the first crushing roller and the second crushing roller, so that the crushed stones are ensured to meet the production requirements, the multistage ore crusher is strong in practicability, meanwhile, when the stones are crushed in the second transmission ring, the collecting hopper is blocked by the crushing disc, the dust is further prevented from drifting out, the health of operators is effectively guaranteed, and when the crushing disc extrudes and crushes the ores, the high pressure positive blower just can open, can smash like this and can go on in step with stopping with dustproof, and dustproof effectual avoids high pressure positive blower to open simultaneously, causes the energy waste, has played energy saving and emission reduction's purpose, is favorable to using widely.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic top view of the first drive ring and the drive mount of the present invention;

FIG. 3 is a perspective view of a first driving ring according to the present invention;

FIG. 4 is a schematic view of the internal structure of the first drive ring according to the present invention;

FIG. 5 is a schematic view of the internal structure of a second drive ring according to the present invention;

FIG. 6 is a schematic top view of the first and second pulverizing rollers of the present invention;

fig. 7 is a schematic view of the output shaft and first crushing roller configuration of the present invention.

In the figure: 1. a housing; 2. a hydraulic cylinder; 3. a crushing disc; 4. crushing teeth; 5. a feed pipe; 6. a discharge pipe; 7. supporting legs; 8. a collection hopper; 9. a first drive ring; 10. a transmission seat; 11. an air inlet pipe; 12. a high pressure fan; 13. a power line; 14. a microswitch; 15. a slide bar; 16. a recess; 17. fixing the vertical rod; 18. a sealing seat; 19. a through hole; 20. an elastic spring; 21. pressing a plate; 22. a seal ring; 23. a linear ball bearing; 24. a connecting seat; 25. a transmission rod; 26. a first crushing roller; 27. a second crushing roller; 28. a second drive ring; 29. a worm; 30. a worm gear; 31. a rotating ball bearing; 32. an output rod; 33. a sun gear; 34. a gear carrier; 35. a planetary gear; 36. a ring gear.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, the present invention provides a technical solution: a multistage ore crusher with a dustproof function comprises a shell 1, a hydraulic cylinder 2 is fixed on the shell 1 through bolts, the hydraulic cylinder 2 is connected with a crushing disc 3 in a welded mode, the shell 1 is connected with supporting legs 7 in a welded mode, meanwhile, the shell 1 is connected with a feeding pipe 5 and a discharging pipe 6 in a welded mode and communicated with each other, the crushing disc 3 is located inside the shell 1, crushing teeth 4 are evenly distributed on the crushing disc 3, a material collecting hopper 8 is arranged under the crushing disc 3, the outer wall of the material collecting hopper 8 is welded on a first transmission ring 9, the material collecting hopper 8 is connected with a transmission seat 10 in a welded mode, the first transmission ring 9 is welded on the inner wall of the shell 1, the first transmission ring 9 is connected with an air inlet pipe 11 in a welded mode and communicated with each other, a high-pressure fan 12 is fixed on the air inlet pipe 11 through bolts, a microswitch 14 is fixed on the inner wall of the first transmission ring 9 through bolts, the microswitch 14 is connected with the high pressure fan 12 through a wire, the transmission seat 10 extends to the inside of the first transmission ring 9, the outer wall of the first transmission ring 9 at the position of the transmission seat 10 is inwards sunken to form a notch 16, the sliding rod 15 penetrates through the inside of the transmission seat 10 positioned outside the first transmission ring 9, the top end surface and the bottom end surface of the transmission seat 10 positioned inside the first transmission ring 9 are respectively welded with a fixed vertical rod 17 and a connecting seat 24, the top end of the fixed vertical rod 17 is welded with a sealing seat 18, the sealing seat 18 is welded with a pressing plate 21, a through hole 19 is formed in the wall body of the first transmission ring 9 attached to the top end surface of the sealing seat 18, the fixed vertical rod 17 is movably connected with a sealing ring 22 through a linear ball bearing 23, the sealing ring 22 is welded on the inner wall of the first transmission ring 9, and an elastic spring 20 is sleeved on the fixed vertical rod 17 between the sealing, and all welding between elasticity spring 20 and sealing ring 22 and the seal receptacle 18, connecting seat 24 bottom end surface welding has transfer link 25, and transfer link 25 extends to inside the second driving ring 28, through rotatory ball bearing 31 swing joint between second driving ring 28 and first crushing roller 26 and the second crushing roller 27, and second driving ring 28 welds on the inner wall of casing 1, and inside being provided with worm 29 and worm wheel 30 of second driving ring 28, worm wheel 30 and output lever 32 welded connection, and through rotatory ball bearing 31 swing joint between output lever 32 and the worm 29 and the second driving ring 28 inner wall.

Crushing dish 3 and collecting hopper 8 are round platform shape structure, and the top surface diameter of crushing dish 3 is less than 8 top surface diameters of collecting hopper to 8 tops and bottom of collecting hopper are the opening form, and collecting hopper 8 and crushing dish 3 are alloy steel simultaneously, and crushing dish 3 can be abundant smashes the ore in collecting hopper 8 like this, and the ore after carrying out preliminary crushing can fall into through collecting hopper 8 and carry out the regrinding between first crushing roller 26 and the second crushing roller 27.

First driving ring 9 and second driving ring 28 are the ring structure of hollow form, and 9 top surfaces of first driving ring are unanimous with horizontal plane contained angle and inlet pipe 5 inclination, and the diameter of the distribution arc length of the through-hole 19 of 9 top surfaces of first driving ring is greater than the diameter of discharging pipe 6, the structural design of first driving ring 9, be convenient for the ore roll to the collection hopper 8 in, the distribution design of through-hole 19 simultaneously, make spun high velocity air can block up discharging pipe 6 and 1 junction of casing in the through-hole 19, avoid the dust to fly away.

Transmission seat 10 and transfer line 25 are that the annular array distributes and have 4, and the 16 wall bodies of notch of transmission seat 10 both sides imbed to transmission seat 10 in, 4 transfer lines 25 can just in time drive first crushing roller 26 and the synchronous rotation of second crushing roller 27, and 4 transmission seats 10 can guarantee that collecting hopper 8 descends more steadily, and transmission seat 10 and notch 16's design cooperates slide bar 15, ensures that transmission seat 10 when vertical migration, can not incline.

The sealing seat 18, the sealing ring 22 and the connecting seat 24 are all in a circular structure, and the pressing plate 21 on the sealing seat 18 is located right above the button of the micro switch 14, so that the sealing seat 18 can be attached to the wall body of the first transmission ring 9, so that ores roll down to the inside of the shell 1 through the feeding pipe 5, broken stones scattered on the ores cannot fall into the inside of the first transmission ring 9 through the through hole 19, damage to the internal structure of the first transmission ring 9 is avoided, normal operation of the internal structure of the first transmission ring 9 is ensured, the sealing ring 22 is arranged, air flow in the air inlet pipe 11 can be discharged only through the through hole 19, stable air flow rate is ensured, the dustproof effect is improved, the connecting seat 24 is arranged, so that the transmission seat 10 can drive the transmission rod 25 to synchronously move downwards through the connecting seat 24, when the pressing plate 21 moves downwards along with the sealing seat 18, the button of the micro switch 14 can be just touched, therefore, the microswitch 14, the high-pressure fan 12 and the power line 13 are in a loop, and the current in the power line 13 can drive the high-pressure fan 12 to operate, so that dust prevention is realized.

The transmission rod 25 is movably connected with the second transmission ring 28 through the linear ball bearing 23, the transmission rod 25 extends into the hollow worm 29, the surface of the transmission rod 25 positioned in the second transmission ring 28 and the inner wall of the worm 29 are both in a thread shape, and the second transmission ring 28 is in thread connection with the worm 29, so that when the transmission rod 25 moves vertically, the linear motion of the transmission rod 25 can be equipped as the axial rotation of the worm 29 because the threads screwed with the transmission rod 25 and the worm 29 are in an axial structure, and further the worm 29 can rotate, and only half of the transmission rod 25 is in a thread shape, so that the other half of the transmission rod can smoothly move vertically on the wall body of the second transmission ring 28 through the linear ball bearing 23.

First crushing roller 26 and second crushing roller 27 are the staggered distribution, and first crushing roller 26 and second crushing roller 27 level set up, and first crushing roller 26 and second crushing roller 27 are hollow structure, staggered distribution's first crushing roller 26 and second crushing roller 27 can carry out double crushing to the ore, 2 first crushing

rollers

26 and 2 second crushing rollers 27 can be corresponding with 2 output pole 32 respectively simultaneously, mutual noninterference when first crushing roller 26 and second crushing roller 27 rotate like this, overall structure is compact, and the operation is reasonable.

The number of the first crushing roller 26 and the second crushing roller 27 is 2, the output rod 32 is inserted into each of the 2 first crushing rollers 26 and the 2 second crushing rollers 27, and the worm wheel 30 on the output rod 32 is meshed with the worm 29, so that when the worm wheel 30 rotates, the worm 29 can be driven to rotate, the worm 29 can drive the output rod 32 to rotate, the output rod 32 can drive the first crushing roller 26 and the second crushing roller 27 to rotate, and further the first crushing roller 26 and the second crushing roller 27 can finish secondary crushing of ores.

The output rod 32 extends into the first crushing roller 26 and the second crushing roller 27 respectively, the output rod 32 is welded with a sun gear 33 and a gear carrier 34, the inner walls of the first crushing roller 26 and the second crushing roller 27 are welded with gear rings 36, the gear carrier 34 is connected with a planet gear 35 in an upper shaft mode, the planet gear 35 is meshed with the sun gear 33 and the gear rings 36, the planet gear 35, the sun gear 33 and the gear rings 36 are matched with the gear carrier 34 to form a planet speed reduction structure, meanwhile, a plurality of groups of the mechanism are distributed at equal intervals, when the output rod 32 rotates, the sun gear 33 can be driven to rotate, the sun gear 33 drives the planet gear 35 combined on the gear carrier 34 to operate, the whole group of the planet gears 35 rotates along the rotation of the gear rings 36, the purpose of speed reduction is achieved, meanwhile, the torques of the first crushing roller 26 and the second crushing roller 27 can be increased, and the first crushing roller 26 and the second crushing roller 27 with low speed and high torque can thoroughly crush, crushing effectual, and reduction gears is equidistant to be distributed, improvement moment of torsion that can be further, rational in infrastructure.

The working principle is as follows: before use, ore to be crushed is put into the shell 1 through the feeding pipe 5, the ore falls into the collecting hopper 8 along the feeding pipe 5, at the moment, the hydraulic cylinder 2 and the power line 13 are connected with an external power supply, the hydraulic cylinder 2 starts to operate under the driving of current, the hydraulic cylinder 2 drives the crushing disc 3 to crush the ore in the collecting hopper 8, the crushing disc 3 can crush the ore into fragments through the crushing teeth 4 and fall between the first crushing rollers 26, when the crushing disc 3 downwards crushes the collecting hopper 8, the collecting hopper 8 vertically downwards moves on the first transmission ring 9 along the notch 16 under the action of the transmission seat 10, the transmission seat 10 drives the sealing seat 18 downwards to move through the fixed vertical rod 17, when the pressing plate 21 on the sealing seat 18 touches the button of the micro switch 14, the high-pressure fan 12 is electrified and starts to operate, the high-pressure fan 12 sucks external air flow into the air inlet pipe 11, and send into in first drive ring 9, spout from through-hole 19 at last, the dust that produces when avoiding broken ore drifts away, meanwhile, transfer line 25 can be along with the synchronous downstream of drive seat 10 through connecting seat 24, when transfer line 25 moved to in the second drive ring 28, can drive worm 29 and rotate, worm 29 drives worm wheel 30 rotatory, worm wheel 30 drives first crushing roller 26 and second crushing roller 27 through output rod 32 and rotates and smash the ore, open discharging pipe 6 at last and can take out the ore after smashing.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a multistage ore crusher of dustproof function, includes casing (1), its characterized in that: the crushing device is characterized in that a hydraulic cylinder (2) is fixed on a shell (1) through a bolt, the hydraulic cylinder (2) is welded with a crushing disc (3), the shell (1) is welded with supporting legs (7), meanwhile, the shell (1) is welded with a feeding pipe (5) and a discharging pipe (6) and communicated with the feeding pipe, the crushing disc (3) is positioned inside the shell (1), crushing teeth (4) are uniformly distributed on the crushing disc (3), a material collecting hopper (8) is arranged under the crushing disc (3), the outer wall of the material collecting hopper (8) is welded on a first transmission ring (9), the material collecting hopper (8) is welded with a transmission seat (10), the first transmission ring (9) is welded on the inner wall of the shell (1), the first transmission ring (9) is welded with an air inlet pipe (11) and communicated with the air inlet pipe (11), and a high-pressure fan (12) is fixed on the air inlet pipe (11) through a bolt, meanwhile, a microswitch (14) is fixed on the inner wall of the first transmission ring (9) through a bolt, the microswitch (14) is connected with a power line (13), the microswitch (14) is in electric connection with a high-pressure fan (12), the transmission seat (10) extends to the inside of the first transmission ring (9), the outer wall of the first transmission ring (9) at the position of the transmission seat (10) is inwards sunken to form a notch (16), a sliding rod (15) penetrates through the inside of the transmission seat (10) positioned outside the first transmission ring (9), a fixed vertical rod (17) and a connecting seat (24) are respectively welded on the top end surface and the bottom end surface of the transmission seat (10) positioned inside the first transmission ring (9), a sealing seat (18) is welded on the top end of the fixed vertical rod (17), the sealing seat (18) is welded with a pressing plate (21), and a through hole (19) is formed in the first transmission ring (9) attached to the top end surface of the sealing seat (18), and the fixed vertical rod (17) is movably connected with the sealing ring (22) through a linear ball bearing (23), the sealing ring (22) is welded on the inner wall of the first transmission ring (9), the fixed vertical rod (17) between the sealing ring (22) and the sealing seat (18) is sleeved with an elastic spring (20), the elastic spring (20) and the sealing ring (22) and the sealing seat (18) are welded, the surface of the bottom end of the connecting seat (24) is welded with a transmission rod (25), the transmission rod (25) extends to the interior of the second transmission ring (28), the second transmission ring (28) is movably connected with the first crushing roller (26) and the second crushing roller (27) through a rotary ball bearing (31), the second transmission ring (28) is welded on the inner wall of the shell (1), and a worm (29) and a worm wheel (30) are arranged in the second transmission ring (28), the worm wheel (30) is connected with the output rod (32) in a welding mode, and the output rod (32) and the worm (29) are movably connected with the inner wall of the second transmission ring (28) through a rotary ball bearing (31);

the crushing disc (3) and the aggregate bin (8) are both of a round table structure, the top end surface diameter of the crushing disc (3) is smaller than the top end surface diameter of the aggregate bin (8), the top end and the bottom end of the aggregate bin (8) are both in an open shape, meanwhile, the aggregate bin (8) and the crushing disc (3) are made of alloy steel, the transmission seat (10) and the transmission rod (25) are distributed in an annular array manner to form 4 parts, the wall bodies of the notches (16) on the two sides of the transmission seat (10) are embedded into the transmission seat (10), the sealing seat (18), the sealing ring (22) and the connecting seat (24) are all in a circular ring structure, the pressing plate (21) on the sealing seat (18) is positioned right above the button of the microswitch (14), the transmission rod (25) is movably connected with the second transmission ring (28) through the linear ball bearing (23), and the transmission rod (25) extends to the inside of the worm (29) which, the surface of a transmission rod (25) positioned inside a second transmission ring (28) and the inner wall of a worm (29) are both in a threaded shape, the second transmission ring (28) is in threaded connection with the worm (29), the first crushing rollers (26) and the second crushing rollers (27) are distributed in a staggered mode, the first crushing rollers (26) and the second crushing rollers (27) are horizontally arranged, the first crushing rollers (26) and the second crushing rollers (27) are in hollow structures, the number of the first crushing rollers (26) and the number of the second crushing rollers (27) are 2, output rods (32) are inserted into the 2 first crushing rollers (26) and the 2 second crushing rollers (27), worm gears (30) on the output rods (32) are meshed with the worm (29), the output rods (32) respectively extend into the first crushing rollers (26) and the second crushing rollers (27), and sun gears (33) and sun gears (34) are welded on the output rods (32), the inner walls of the first crushing roller (26) and the second crushing roller (27) are welded with gear rings (36), a gear frame (34) is in shaft connection with a planetary gear (35), the planetary gear (35) is meshed with a sun gear (33) and the gear rings (36), the planetary gear (35), the sun gear (33) and the gear rings (36) are matched with the gear frame (34) to form a planetary speed reduction structure, and meanwhile, multiple groups of the mechanism are distributed at equal intervals;

the crushing disc (3) is in the downward extrusion of the aggregate bin (8), the aggregate bin (8) is in under the action of the transmission seat (10), the aggregate bin moves vertically downwards on the first transmission ring (9) along the notch (16), the transmission seat (10) drives the sealing seat (18) to move downwards through the fixed vertical rod (17), when the pressing plate (21) on the sealing seat (18) touches the button of the microswitch (14), the high-pressure fan (12) is electrified and starts to operate, the high-pressure fan (12) sucks external air flow into the air inlet pipe (11) and sends the air flow into the first transmission ring (9) and finally sprays out from the through hole (19) to avoid the flying dust generated during crushing of ores, meanwhile, the transmission rod (25) can move downwards along with the transmission seat (10) synchronously through the connecting seat (24), when transfer line (25) move to in second drive ring (28), can drive worm (29) are rotated, worm (29) drive worm wheel (30) are rotatory, worm wheel (30) pass through output rod (32) drive first crushing roller (26) with second crushing roller (27) rotate and smash the ore.

2. The multistage ore crusher of claim 1, which has a dust-proof function, characterized in that: first driving ring (9) and second driving ring (28) are the ring structure of hollow form, and first driving ring (9) top surface is unanimous with horizontal plane contained angle and inlet pipe (5) inclination to the diameter of the distribution arc length of through-hole (19) on first driving ring (9) top surface is greater than the diameter of discharging pipe (6).