CN110465382B

CN110465382B - Self-sorting planetary ball mill

Info

Publication number: CN110465382B
Application number: CN201910786250.5A
Authority: CN
Inventors: 刘成华
Original assignee: Wuhan Yuge Power Equipment Co ltd
Current assignee: Wuhan Yuge Power Equipment Co ltd
Priority date: 2019-08-24
Filing date: 2019-08-24
Publication date: 2021-04-02
Anticipated expiration: 2039-08-24
Also published as: CN110465382A

Abstract

The invention discloses a self-sorting planetary ball mill, which relates to the technical field of planetary ball mill equipment and solves the problem that materials need to be sorted and circularly sent into the planetary ball mill for grinding in the follow-up process, and comprises a fixed frame and a main shaft, wherein the main shaft is rotationally arranged on the fixed frame, and a grinding cylinder with the rotation direction opposite to that of the main shaft is rotationally arranged on the main shaft, and the self-sorting planetary ball mill also comprises: a sorting device; the sorting device is arranged at the outlet end inside the grinding cylinder body. The invention has the function of sorting, improves the grinding efficiency of the planetary ball mill, reduces the extra power loss and saves more energy.

Description

Self-sorting planetary ball mill

Technical Field

The invention relates to the technical field of ball milling equipment, in particular to a self-sorting planetary ball mill.

Background

The ball mill is a device for crushing the crushed materials, and comprises a horizontal barrel, a feeding hollow shaft, a discharging hollow shaft, a grinding head and the like, wherein a certain number of grinding balls are filled in the barrel, in the working process, the grinding balls are driven to rotate in the barrel through the rotation of the barrel, and the materials are crushed by utilizing the impact of the grinding balls on the materials. The ball mill is divided into a dry type grinding mode and a wet type grinding mode, is suitable for grinding various ores and other materials, is widely applied to the production industries of cement, novel building materials, refractory materials, division, glass ceramics and the like,

chinese patent with grant publication number CN206104051U, a ball mill is proposed, including the ball mill body, the feed inlet has been seted up on ball mill body upper portion, the discharge gate has been seted up to ball mill body lower part, the ball mill body is connected with the frame that is used for fixed ball mill body through the shaft coupling, the frame passes through this threaded connection in the shaft coupling, shaft coupling and ball mill body design as an organic whole, the inside ball that grinds that is provided with of ball mill body, ball mill body outer fringe is equipped with the heat insulating board and is used for supporting a belt section of thick bamboo, a belt section of thick bamboo passes through the belt and is connected with the drive arrangement transmission, ball mill body upper portion is equipped with the mounting hole, be equipped with connecting device between ball mill body and the refrigerating.

The above prior art solutions have the following drawbacks: the material is at the inside back that grinds of ball mill, need sort exhaust material to obtain the material that accords with the particle size requirement, the not conform to requirement needs drop into the ball mill and grind once more, and the circulation is reciprocal, has increased the power loss of ball mill and the wearing and tearing of ball mill pipeline, and grinding efficiency is low.

Disclosure of Invention

The invention aims to provide a self-sorting planetary ball mill which can preliminarily sort materials, reduce the circulating conveying operation and has high grinding efficiency.

The invention is realized by the following technical scheme:

self-sorting formula planet ball mill, including mount, main shaft, the main shaft rotate set up in on the mount, rotate on the main shaft be provided with main shaft rotation opposite direction's grinding vessel still includes: a sorting device; the sorting device is arranged at the outlet end inside the grinding cylinder body.

By adopting the technical scheme, the ball mill is different from the prior art in that the sorting device is additionally arranged at one end, close to the outlet end, in the grinding cylinder, the sorting device is used for preliminarily sorting materials to be discharged, the materials which accord with the particle size are discharged out of the grinding cylinder, and the materials which do not accord with the particle size are separated from the grinding cylinder through the screening device and continuously ground.

Further setting the following steps: a left frame plate and a right frame plate are fixedly connected to two ends of the main shaft respectively, the left frame plate is fixedly connected with a plurality of grinding head bearing seats, the right frame plate is fixedly connected with a plurality of grinding tail bearing seats, the grinding cylinder is rotatably arranged between the grinding head bearing seats and the grinding tail bearing seats on the same axis, a first driving motor for driving the main shaft to rotate is fixed on the fixing frame, and a gear transmission device for driving the grinding cylinder to rotate reversely relative to the main shaft is fixed between the right frame plate and the fixing frame;

the grinding vessel in left side frame plate with the both ends difference fixedly connected with feeding return bend and discharging pipe that right side frame plate located, the feeding return bend with the discharging pipe all with the inside intercommunication setting of grinding vessel, the mount in the one end that the feeding return bend was located is fixed with the spiral feed arrangement who is used for the inside feed of grinding vessel, the inside activity of grinding vessel is provided with a plurality of balls, and is close to the inside fixedly connected with of the one end of discharging pipe sorting unit.

Through adopting above-mentioned technical scheme, the material that will grind is added to the grinding vessel in through spiral feed arrangement, a driving motor drive main shaft rotates simultaneously, drive left frame plate, right frame plate, the auxiliary frame plate, the grinding vessel is revolution simultaneously, transmission effect through gear drive, the drive grinding vessel carries out the rotation motion opposite with revolution direction of rotation, make the steel ball that grinds in the grinding vessel bump into the material and grind, the material grinds the back, arrange the discharging pipe to the material that meets the requirements with the granule size or the less material of quality through sorting unit, and keep apart in the inside continuation grinding of grinding vessel with the material that will not conform to the granule size, thereby realize the preliminary sorting of material.

Further setting the following steps: the sorting device is a sorting cage which is composed of a connecting ring, sorting blades and a bottom plate, the grinding cylinder is fixedly connected with the connecting ring which is close to one end of the discharge pipe and coaxial with the discharge pipe, the connecting ring is fixedly connected with a plurality of sorting blades in sequence along the axial direction of the connecting ring, and the sorting blades are far away from the bottom plate.

Through adopting above-mentioned technical scheme, the grinding vessel drives and selects separately cage pivoted in-process, selects separately the blade and produces the cutting action to the material, and the material that does not conform to the requirement receives the centrifugal action of selecting separately the cage and gets rid of inside the grinding vessel, and the material that conforms to the requirement receives the adsorption of air and penetrates through the clearance between the selection blade and select separately the cage inside to realize that the material is selected separately.

Further setting the following steps: the sorting blade is a cylindrical metal rod.

Further setting the following steps: the sorting blade is a wedge-shaped wear-resisting plate.

Through adopting above-mentioned technical scheme, select separately simple structure of post easily preparation, cylindric metal rod makes the whole surface of separation cage more smooth, and the material entering position of separation cage is difficult for blockking up.

Further setting the following steps: gear drive includes fixed gear, moves gear, gap bridge gear, the mount in the one end that right side frame plate was located is fixed with the auxiliary frame plate, the mount in right side frame plate with fixedly connected with between the auxiliary frame plate with the main shaft is coaxial fixed gear, right side frame plate with it is provided with a plurality ofly respectively with a plurality of still to rotate between the auxiliary frame plate the coaxial fixed connection of grinding vessel moves the gear, and in move the gear with the common meshing transmission of fixed gear is provided with gap bridge gear.

By adopting the technical scheme, the spindle rotates to drive the left frame plate and the right frame plate to rotate, the integral rotation of the left frame plate and the right frame plate drives the grinding cylinder, the moving gear and the carrier gear to revolve, and meanwhile, the carrier gear and the static fixed gear are in meshing transmission, so that the carrier gear generates rotation in the same revolution direction as the carrier gear, and in the rotation process of the carrier gear, the carrier gear is in meshing transmission with the moving gear, so that the driving moving gear generates rotation in the opposite revolution direction to the revolving gear, and finally, the grinding cylinder is driven to perform rotation motion in the opposite revolution direction along with the revolution of the left frame plate and the right frame plate.

Further setting the following steps: and the joint of the main shaft of the moving gear and the right frame plate and the auxiliary frame plate is coaxially sleeved with a sealing ring.

Through adopting above-mentioned technical scheme, the sealing washer reduces the seepage of moving gear main shaft department lubricating oil for the rotation of moving the gear is more stable, and the wear is littleer, and life is longer.

Further setting the following steps: the main shaft is close to the coaxial fixedly connected with cavity inlet pipe of the one end of left frame plate, the feed elbow is kept away from the one end of grinding vessel with cavity inlet pipe intercommunication.

Through adopting above-mentioned technical scheme, utilize the cavity inlet pipe to collect the material that will grind, carry in proper order again to each grinding vessel in, when the main shaft rotates, drive cavity inlet pipe and a plurality of feeding return bends and rotate simultaneously for the design of grinding vessel feed end accords with reality more, and then makes the feeding of grinding vessel simpler, and the transport of material is more stable.

Further setting the following steps: the spiral feeding device comprises a feeding pipe, a feeding pipe and a feeding screw rod, the feeding pipe communicated with the hollow feeding pipe is fixed at one end of the fixing frame where the hollow feeding pipe is located, the feeding pipe communicated with the feeding pipe is fixedly connected with the peripheral wall of the feeding pipe, the feeding screw rod used for pushing materials to enter the hollow feeding pipe is arranged in the feeding pipe in a rotating mode, and a second driving motor used for driving the feeding screw rod to rotate is fixed on the fixing frame.

Through adopting above-mentioned technical scheme, in adding the material to the pay-off pipe through the filling tube, rotate through second driving motor drive feeding screw, in feeding screw promoted the material and gets into to the cavity feed pipe from the pay-off pipe, realize the transport of material.

Further setting the following steps: a plurality of access windows are opened on the periphery of the grinding cylinder, and cover plates used for sealing the access windows are arranged in a clamping manner.

Through adopting above-mentioned technical scheme, the access panel is convenient for the staff and is overhauld grinding section of thick bamboo inside, and the apron is convenient for seal the access panel to reduce the influence to grinding section of thick bamboo in the working process.

In conclusion, the beneficial technical effects of the invention are as follows:

(1) in the process that the first driving motor drives the main shaft to rotate, the left frame plate, the right frame plate and the grinding cylinders are driven to simultaneously revolve, the plurality of grinding cylinders are driven to rotate in the direction opposite to the revolution direction under the transmission action of the fixed gear, the carrier gear and the moving gear, and the influence of the grinding balls on the rotation of the grinding cylinders is reduced, so that the grinding effect of the grinding balls in the grinding cylinders on materials is better, and the grinding efficiency is higher;

(2) drive through the grinding vessel and select separately the cage and carry out rotation and revolution, select separately the inside negative pressure air that produces of cage and drive the material that the particle size meets the requirements and get into and select separately the cage in, discharge through the discharging pipe simultaneously, realize selecting separately the material when grinding the material, reduce follow-up material and select separately the step of regrinding, it is more energy-efficient, reduced equipment input simultaneously, the running cost is lower.

Drawings

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

FIG. 2 is a first schematic diagram of the overall construction of a sorting cage according to the present invention;

FIG. 3 is a schematic diagram of the overall structure of the sorting cage of the present invention.

Reference numerals: 1. a fixed mount; 2. a main shaft; 3. a left frame plate; 4. a right frame plate; 5. a grinding head bearing seat; 6. grinding a tail bearing seat; 7. a grinding cylinder; 8. a first drive motor; 9. a feeding bent pipe; 10. a discharge pipe; 11. grinding balls; 12. a sorting cage; 13. a connecting ring; 14. sorting the leaves; 15. a base plate; 16. a fixed gear; 17. a moving gear; 18. a carrier gear; 19. an auxiliary frame plate; 20. a seal ring; 21. a hollow feed tube; 22. a feed pipe; 23. a feed tube; 24. a feed screw; 25. a second drive motor; 26. an access panel; 27. and (7) a cover plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, the self-sorting planetary ball mill disclosed by the invention comprises a fixed frame 1, wherein a main shaft 2 is rotatably arranged on the fixed frame 1, the main shaft 2 is horizontally placed on the fixed frame 1, a first driving motor 8 for driving the main shaft 2 to rotate is fixed at one end of the fixed frame 1, and a rotating shaft of the first driving motor 8 is coaxially and fixedly connected with the main shaft 2 through a coupler. The spindle 2 is driven in rotation by a first drive motor 8.

The both ends of main shaft 2 are fixedly connected with left frame plate 3 and right frame plate 4 respectively, left frame plate 3 and right frame plate 4 are preferred the plectane and both mutual parallel arrangement, left frame plate 3 and right frame plate 4 with the coaxial setting of main shaft 2, a plurality of bistrique bearing frame of 3 fixedly connected with 5 of left frame plate, a plurality of mill tail bearing frame of fixedly connected with 6 on the right frame plate 4, it is provided with grinding vessel 7 to rotate between bistrique bearing frame 5 and the mill tail bearing frame 6 on the same axis, grinding vessel 7 direction of rotation is opposite with main shaft 2's direction of rotation, grinding vessel 7 is preferably four, grinding vessel 7 is hollow cylindric setting and its axis is parallel to each other with main shaft 2's axis, grinding vessel 7 inside activity is provided with a plurality of ball. The grinding cylinder 7 is used for loading materials to be ground, the main shaft 2 drives the left frame plate 3, the right frame plate 4 and the grinding cylinder 7 to revolve in the rotating process, and meanwhile, the grinding cylinder 7 rotates in the direction opposite to the revolving rotating direction, so that the grinding balls 11 do irregular movement in the grinding cylinder 7, and the materials in the grinding cylinder 7 are ground.

A gear transmission device for driving the grinding cylinder 7 to rotate reversely relative to the main shaft 2 is fixed between the right frame plate 4 and the fixing frame 1, the gear transmission device comprises a fixed gear 16, a moving gear 17 and a gap gear 18, an auxiliary frame plate 19 is fixed at one end of the fixing frame 1 where the right frame plate 4 is located, the auxiliary frame plate 19 is parallel to the right frame plate 4, the fixing frame 1 is fixedly connected with the fixed gear 16 between the right frame plate 4 and the auxiliary frame plate 19, the fixed gear 16 and the main shaft 2 are coaxially arranged, a plurality of moving gears 17 respectively and fixedly connected with the grinding cylinders 7 are further rotatably arranged between the right frame plate 4 and the auxiliary frame plate 19, and the gap gear 18 is arranged on the moving gear 17 and the fixed gear 16 in a common meshing transmission mode. In the practical application process, the rotating linear speed of the grinding cylinder 7 is adjusted by adjusting the gear tooth ratio among the moving gear 17, the fixed gear 16 and the carrier gear 18, so that the grinding speed of the material is adjusted. When materials are ground, the rotation of the spindle 2 drives the right frame plate 4 to rotate, the integral rotation of the left frame plate 3 and the right frame plate 4 drives the grinding cylinder 7, the moving gear 17 and the intermediate gear 18 to revolve, meanwhile, the intermediate gear 18 and the static fixed gear 16 are in meshing transmission, so that the intermediate gear 18 rotates in the same direction as the revolving direction of the intermediate gear, and in the rotating process of the intermediate gear 18, the intermediate gear is in meshing transmission with the moving gear 17, so that the moving gear 17 is driven to rotate in the direction opposite to the revolving direction of the moving gear, and finally, the grinding cylinder 7 is driven to revolve along with the right frame plate 4 and simultaneously, the rotating motion in the direction opposite to the revolving direction is carried out.

The joint of the main shaft 2 of the moving gear 17, the right frame plate 4 and the auxiliary frame plate 19 is coaxially sleeved with a sealing ring 20, and the sealing ring 20 is a rubber ring made of nitrile rubber. The sealing ring 20 reduces the leakage of the lubricating oil at the main shaft 2 of the moving gear 17, so that the moving gear 17 rotates more stably, the abrasion is less, and the service life is longer.

Grinding vessel 7 is fixedly connected with feeding return bend 9 and discharging pipe 10 respectively in the both ends that left frame plate 3 and right frame plate 4 were located, and feeding return bend 9 and discharging pipe 10 all set up with the inside intercommunication of grinding vessel 7, and feeding return bend 9 is "L" font setting, and the one end that grinding vessel 7 was kept away from to feeding return bend 9 and discharging pipe 10 penetrates bistrique bearing frame 5 respectively and grinds tail bearing frame 6 and extend to grinding vessel 7 outside. The material to be ground is fed into the grinding vessel 7 through the feed elbow 9, and the ground material in the grinding vessel 7 is discharged through the discharge pipe 10.

The coaxial fixedly connected with cavity inlet pipe 21 of the one end that main shaft 2 is close to left frame plate 3, cavity inlet pipe 21 is the five-way hollow tube, and the one end that grinding vessel 7 was kept away from to the feeding return bend 9 of a plurality of grinding vessel 7 respectively with a plurality of exit end fixed connection of cavity inlet pipe 21, and with the inside intercommunication of cavity inlet pipe 21, the entrance point and the coaxial fixed connection of conveying pipe 22 (refer to below) of cavity inlet pipe 21. Utilize cavity inlet pipe 21 to collect the material that will grind, carry in proper order again to each grinding vessel 7 in, when main shaft 2 rotates, drive cavity inlet pipe 21 and a plurality of feeding return bend 9 and the axis of a main shaft 2 rotates as the center simultaneously for the design of grinding vessel 7 feed end accords with reality more, and then makes the feeding of grinding vessel 7 simpler, and the transport of material is more stable.

A spiral feeding device for feeding materials into the grinding cylinder 7 is fixed at one end of the fixed frame 1 at the feeding bent pipe 9, the spiral feeding device comprises a feeding pipe 22 and a feeding pipe 23, feeding screw 24, mount 1 is fixed with the conveying pipe 22 with cavity inlet pipe 21 intercommunication in the one end that cavity inlet pipe 21 located, conveying pipe 22 crouches on mount 1, conveying pipe 22 sets up with main shaft 2 is coaxial, the perisporium fixedly connected with of conveying pipe 22 and the inside filling tube 23 that communicates of conveying pipe 22, the axis of filling tube 23 sets up with conveying pipe 22's axis is perpendicular, conveying pipe 22 is inside to be rotated and is provided with feeding screw 24, feeding screw 24 sets up with conveying pipe 22 is coaxial, be fixed with drive feeding screw 24 pivoted second driving motor 25 on the mount 1, the coaxial fixed connection of shaft coupling and feeding screw 24's center pin is passed through in the pivot of second driving motor 25. The feeding screw 24 is used for pushing materials to enter the hollow feeding pipe 21, the materials are added into the feeding pipe 22 through the feeding pipe 23, the feeding screw 24 is driven to rotate through the second driving motor 25, and the feeding screw 24 pushes the materials to enter the hollow feeding pipe 21 from the feeding pipe 22, so that the materials are conveyed.

The grinding cylinder 7 is close to the internal fixedly connected with one end of the discharge pipe 10, the sorting device is a sorting cage 12, the sorting cage 12 is composed of a connecting ring 13, sorting sieve columns 14 and a bottom plate 15, the grinding cylinder 7 is close to the internal fixedly connected with connecting ring 13 of one end of the discharge pipe 10, the connecting ring 13 is sequentially and fixedly connected with a plurality of sorting blades 14 along the circumferential direction of the connecting ring 13, the sorting blades 14 are arranged at equal intervals, the sorting blades 14 are far away from the common fixedly connected with bottom plate 15 of one end of the connecting ring 13, the axes of the connecting ring 13, the sorting blade columns 14 and the bottom plate 15 are all arranged in parallel with the axis of the main shaft 2, and the connecting ring 13 is fixedly connected with the circumferential edge of one end of the. Grinding vessel 7 drives and selects separately cage 12 pivoted in-process, selects separately blade 14 and produces the cutting action to the material, and the material that does not conform to the requirement receives the centrifugal action of selecting separately cage 12 and gets rid of inside grinding vessel 7, and the material that conforms to the requirement receives the adsorption of air and penetrates through the clearance between selecting separately the blade 14 and select separately cage 12 inside to realize that the material is selected separately.

The sorting vanes 14 are cylindrical wear resistant rods (see fig. 2) or wedge shaped wear resistant plates (see fig. 3), and the minimum distance between adjacent sorting vanes 14 is the maximum particle size of the material to be sorted. The sorting blade 14 made of the cylindrical wear-resistant rod or the wedge-shaped wear-resistant plate is simple in structure and easy to manufacture, the cylindrical wear-resistant rod enables the whole surface of the sorting cage 12 to be smoother and smoother, and the material entering position of the sorting cage 12 is not easy to block.

A plurality of access windows 26 are opened on the periphery of the grinding cylinder 7, preferably two access windows 26 are provided, a cover plate 27 for sealing the access windows 26 is further arranged on the periphery of the grinding cylinder 7 in a clamping mode, and after the cover plate 27 is clamped into the access windows 26, the cover plate 27 is fixed through threaded connection of bolts and the grinding cylinder 7. The access panel 26 is convenient for the staff to overhaul the inside of the grinding cylinder 7, and the cover plate 27 is convenient for sealing the access panel 26, thereby reducing the influence on the working process of the grinding cylinder 7.

The implementation principle and the beneficial effects of the embodiment are as follows:

materials to be ground are added into a feeding pipe 22 through a feeding pipe 23, a second driving motor 25 drives a feeding screw 24 to rotate, the feeding screw 24 pushes the materials to enter a hollow feeding pipe 21 and is guided into the grinding cylinder 7 through a feeding bent pipe 9, meanwhile, a first driving motor 8 drives a main shaft 2 to rotate to drive a left frame plate 3, a right frame plate 4, an auxiliary frame plate 19 and the grinding cylinder 7 to simultaneously revolve, the grinding cylinder 7 is driven to perform autorotation motion opposite to the revolution rotating direction through the linkage effect of a fixed gear 16, a gap bridge gear 18 and a moving gear 17, so that grinding balls 11 in the grinding cylinder 7 grind the materials, after the materials are ground, the materials with the required particle size or the materials with the small particle size enter a sorting cage 12 and are arranged to a discharging pipe 10, the materials without the particle size are isolated from the inside the grinding cylinder 7 through the sorting cage 12 to be continuously ground, thereby realizing the preliminary screening of the materials. The ball mill has the sorting function, reduces the steps of sorting and re-grinding after discharging materials, improves the grinding efficiency of the ball mill, reduces extra power loss and saves more energy.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. Self-sorting planetary ball mill, comprising: mount (1), main shaft (2), the main shaft rotate set up in on mount (1), rotate on main shaft (2) be provided with main shaft (2) rotation direction opposite's grinding vessel (7), its characterized in that still includes: a sorting device; the sorting device is arranged at the discharge port end in the grinding cylinder (7); a left frame plate (3) and a right frame plate (4) are respectively and fixedly connected to two ends of the main shaft (2), the left frame plate (3) is fixedly connected with a plurality of grinding head bearing seats (5), the right frame plate (4) is fixedly connected with a plurality of grinding tail bearing seats (6), the grinding head bearing seats (5) and the grinding tail bearing seats (6) on the same axis are rotatably provided with the grinding cylinder (7), a first driving motor (8) for driving the main shaft (2) to rotate is fixed on the fixing frame (1), and a gear transmission device for driving the grinding cylinder (7) to reversely rotate relative to the main shaft (2) is fixed between the right frame plate (4) and the fixing frame (1); the grinding cylinder (7) is fixedly connected with a feeding bent pipe (9) and a discharging pipe (10) at two ends of the left frame plate (3) and the right frame plate (4) respectively, the feeding bent pipe (9) and the discharging pipe (10) are communicated with the inside of the grinding cylinder (7), a spiral feeding device for feeding the inside of the grinding cylinder (7) is fixed at one end of the fixing frame (1) where the feeding bent pipe (9) is located, a plurality of grinding balls (11) are movably arranged in the grinding cylinder (7), and the sorting device is fixedly connected to the inside of one end close to the discharging pipe (10); the sorting device is a sorting cage (12), the sorting cage (12) is composed of a connecting ring (13), sorting blades (14) and a bottom plate (15), the connecting ring (13) coaxial with the discharge pipe (10) is fixedly connected to the inner part of one end, close to the discharge pipe (10), of the grinding cylinder (7), the connecting ring (13) is sequentially and fixedly connected with the sorting blades (14) along the axial direction of the connecting ring, and one ends, far away from the connecting ring (13), of the sorting blades (14) are jointly and fixedly connected with the bottom plate (15); the sorting blade (14) is a wedge-shaped wear-resisting plate; one end, close to the left frame plate (3), of the main shaft (2) is coaxially and fixedly connected with a hollow feeding pipe (21), and one end, far away from the grinding cylinder (7), of the feeding bent pipe (9) is communicated with the hollow feeding pipe (21); the spiral feeding device comprises a feeding pipe (22), a feeding pipe (23) and a feeding screw (24), wherein the fixing frame (1) is provided with the feeding pipe (22) communicated with the hollow feeding pipe (21), the peripheral wall of the feeding pipe (22) is fixedly connected with the feeding pipe (23) communicated with the inside of the feeding pipe (22), the feeding pipe (22) is internally and rotatably provided with the feeding screw (24) used for pushing materials to enter the hollow feeding pipe (21), and the fixing frame (1) is fixedly provided with a second driving motor (25) for driving the feeding screw (24) to rotate.

2. The self-sorting planetary ball mill according to claim 1, wherein the gear transmission device comprises a fixed gear (16), a moving gear (17) and a carrier gear (18), wherein an auxiliary frame plate (19) is fixed to one end of the fixed frame (1) where the right frame plate (4) is located, the fixed gear (16) coaxial with the spindle (2) is fixedly connected between the right frame plate (4) and the auxiliary frame plate (19) of the fixed frame (1), a plurality of moving gears (17) respectively and fixedly connected with the grinding cylinders (7) are further rotatably arranged between the right frame plate (4) and the auxiliary frame plate (19), and the carrier gear (18) is arranged in a manner that the moving gears (17) and the fixed gear (16) are jointly engaged and driven.

3. The self-sorting planetary ball mill according to claim 2, characterized in that the joints of the main shaft of the moving gear (17) and the right frame plate (4) and the auxiliary frame plate (19) are coaxially sleeved with sealing rings (20).

4. The self-sorting planetary ball mill according to claim 1, characterized in that a plurality of access windows (26) are opened on the peripheral side of the grinding cylinder (7), and a cover plate (27) for closing the access windows (26) is snap-fitted.