CN212702217U - Mill capable of screening materials - Google Patents

Abstract

The utility model belongs to the technical field of cement manufacture's technique and specifically relates to a can screen mill of material is related to, which comprises a bracket, set up the mill barrel on the support and drive mill barrel pivoted first motor, mill barrel one end is provided with first discharge gate, be connected with the transmission on the first discharge gate and take over, the transmission is taken over and is connected with first motor, set up the through-hole that supplies the material to fall out on the transmission is taken over, be connected with a sieve section of thick bamboo on the transmission is taken over, set up the sieve mesh that prevents that the great material of granule from falling out on the sieve section of thick bamboo, a sieve section of thick bamboo is taken over through first bolt fixed connection. The utility model discloses prevent that the great stone of granule from falling out along with the less stone of granule from first discharge gate, it is comparatively convenient when making follow-up use stone granule production cement, the great material of granule causes the influence to cement production when preventing to use, avoids follow-up needs to filter and process the great stone of granule of mixing in the less stone of granule again, reduces the energy consumption.

Description

Mill capable of screening materials

Technical Field

The utility model belongs to the technical field of the technique of cement manufacture and specifically relates to a but mill of screening material is related to.

Background

At present, a mill is a key device for crushing after materials are crushed. It is widely used in cement, silicate products and other production industries to crush various ores and other materials. Among them, the ball mill is one of mills.

The utility model with the publication number of CN206924839U discloses a horizontal ball mill, which comprises a bracket; the ball mill cylinder is arranged on the bracket and is provided with a feeding hole and a discharging hole; the driver is arranged on the bracket and positioned on one side of the ball mill cylinder, the output end of the driver is connected to a first rotating shaft, and the first rotating shaft penetrates through the ball mill cylinder and is arranged along the axis of the ball mill cylinder; the transmission mechanism comprises a transmission gear arranged at the output end of the driver and at least two driven gears meshed with the transmission gear, and a second rotating shaft is coaxially arranged on each driven gear; and a stirring blade including a first blade provided on the first rotation shaft and a second blade provided on the second rotation shaft. The utility model discloses a horizontal ball mill that provides is provided with first axis of rotation and second axis of rotation in a ball mill barrel, and has first blade and second blade, has strengthened horizontal ball mill's abrasive material efficiency.

The above prior art solutions have the following drawbacks: although the utility model discloses an efficiency that the stone was ground through the reinforcing of first epaxial first blade of rotation and the epaxial second blade of second rotation, the condition that the stone was not ground into the granule of equidimension appears easily at the in-process of grinding, leads to having the great stone of granule to fall out along with the less stone of granule from the discharge gate, has certain trouble when making the follow-up in-process that is used for producing cement.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art exists, the utility model aims at providing a but mill of screening material, take over and the mill barrel rotates through opening first motor drive transmission, the mill barrel rotates and grinds the internal stone of mill barrel, and the stone granule falls out to the transmission takeover from first discharge gate after grinding, the less stone of granule falls out from the sieve mesh, the great stone of granule is blockked by the sieve section of thick bamboo, do not fall out, prevent that the great stone of granule from falling out along with the less stone of granule from first discharge gate, it is comparatively convenient when making follow-up use stone granule production cement, the great material of granule causes the influence to cement production when preventing to use, avoid follow-up needs to filter and process the great stone of granule of mixing in the less stone of granule again, reduce the energy consumption.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

the utility model provides a mill that can screen material, includes the support, sets up the mill barrel on the support and drives mill barrel pivoted first motor, mill barrel one end is provided with first discharge gate, be connected with the transmission on the first discharge gate and take over, the transmission is taken over and is connected with first motor, set up the through-hole that supplies the material to fall out on the transmission is taken over, be connected with a sieve section of thick bamboo on the transmission is taken over the lateral wall, set up the sieve mesh that prevents that the granule is greater than the material of sieve mesh size and falls out on the sieve section of thick bamboo, a sieve section of thick bamboo is taken over in the transmission through first bolt fixed connection.

Through adopting above-mentioned technical scheme, it takes over and the mill barrel rotates to open first motor drive transmission, the mill barrel rotates and grinds the internal stone of mill barrel, and after grinding, the stone granule falls out to the transmission is taken over from first discharge gate, the less stone of granule falls out from the sieve mesh, the great stone of granule is blockked by the sieve section of thick bamboo, do not fall out, prevent that the great stone of granule from falling out from first discharge gate along with the less stone of granule, it is comparatively convenient when making follow-up use stone granule production cement, the great material of granule causes the influence to cement manufacture when preventing to use, avoid follow-up needs to filter and process the great stone of granule of mixing in the less stone of granule again, reduce the energy consumption.

The present invention may be further configured in a preferred embodiment as: the sieve section of thick bamboo includes half barrel of first and half barrel of second, half barrel of first and half barrel pass through second bolt fixed connection.

By adopting the technical scheme, the screen cylinder is divided into the first half cylinder and the second half cylinder, and the first half cylinder is connected with the second half cylinder through the bolt; when the screen cylinder needs to be taken down for cleaning, the first bolt connected with the transmission connecting pipe is taken down firstly, and then the second bolt connected with the first half cylinder and the second half cylinder is taken down, so that the first half cylinder and the second half cylinder can be taken down from the screen cylinder respectively for cleaning.

The present invention may be further configured in a preferred embodiment as: an upper cover body is arranged above the screen drum, a lower cover body is arranged below the screen drum, and a support rod which is contacted with the ground is connected to the lower cover body; the upper cover body is fixedly connected with the lower cover body through a third bolt, and the screen drum is rotatably connected in a cavity formed by the upper cover body and the lower cover body; a second discharge hole for falling out of the materials is formed below the lower cover body; and a screening device for screening materials is arranged below the second discharge hole.

By adopting the technical scheme, the upper cover body and the lower cover body not only play a role in protecting the screen drum; and the second discharge gate sets up in the lower cover body below, prevents that the stone granule from falling out towards all directions under the effect of centrifugal force, guarantees that the stone granule only falls out to the sieving mechanism in from second discharge gate department.

The present invention may be further configured in a preferred embodiment as: the screening device comprises a collection box, a first screening plate and a second screening plate, wherein the first screening plate is provided with a plurality of first screening holes, and the second screening plate is provided with a plurality of second screening holes; the first screening plate is positioned above the second screening plate, and the aperture of the second screening hole is smaller than that of the first screening hole; the collecting box is provided with a positioning component for positioning the first screening plate on the collecting box, and the collecting box is provided with a vibration component for driving the second screening plate to vibrate.

By adopting the technical scheme, the screening device further screens the stone particles falling out of the second discharge hole; the stone particles fall onto the first screening plate firstly, and when the stone particles are larger than the aperture of the first screening hole, the stone particles are left above the first screening plate; when the stone particles are smaller than the first screening holes and larger than the second screening holes, the stone particles pass through the first screening plate and are retained on the second screening plate; when the stone particles are smaller than the second screening holes, the stone particles fall below the second screening plate; further carry out the granule with the stone and screen, can select the stone of suitable granule size according to the demand when making things convenient for follow-up production cement. The positioning assembly positions the first screening plate on the collecting box, so that the connection strength of the first screening plate and the collecting box is enhanced; the setting of vibration subassembly drives the vibration of second screening board, makes the stone granule that is less than second screening hole aperture continue to drop downwards better.

The present invention may be further configured in a preferred embodiment as: the side wall of the collecting box is provided with a connecting groove for the first screening plate to be inserted into the collecting box from top to bottom, the first screening plate is fixedly connected with a first handheld rod which is convenient for lifting the first screening plate, the side wall of the connecting groove is provided with a T-shaped groove, the positioning assembly comprises a T-shaped block and a compression spring, the T-shaped block is connected into the T-shaped groove in a sliding manner, one end of the compression spring is connected with the bottom of the T-shaped groove, the other end of the compression spring is connected with the T-shaped block, the T-shaped block extends out of the T-shaped groove under the elastic action force of the compression spring, and the end face of the lower end of the T-shaped block, which extends; the end face of the upper end of the T-shaped block, which extends out of the T-shaped groove, is provided with a guide inclined plane, and the distance from the guide inclined plane to the bottom of the T-shaped groove is gradually increased in the direction from top to bottom; and the T-shaped block is provided with a pulling assembly for completely pulling the T-shaped block into the T-shaped groove.

Through adopting above-mentioned technical scheme, during the first screening board of installation, the handheld first handheld pole of operating personnel, peg graft to the spread groove under from last with first screening board earlier, at the in-process that first screening board was pegged graft, first screening board lateral wall earlier with guide inclined plane butt, make the guide inclined plane receive the effort towards T type tank bottom, make T type piece overcome compression spring's elastic force and remove to the direction that is close to T type tank bottom, continue to move down as first screening board, behind T type tank, T type piece stretches out T type tank again under compression spring's elastic force, and make T type piece stretch out the lower extreme terminal surface in T type tank and the upper end face contact of first screening board, first screening board installation finishes promptly. When first screening board was dismantled to needs, operating personnel drives T type piece through the pulling subassembly and gets into T type inslot completely, handheld first handheld pole upwards pull out the collecting box with first screening board again can.

The present invention may be further configured in a preferred embodiment as: the pulling assembly comprises a shifting sheet and an operating handle, the shifting sheet is fixedly connected to the T-shaped block, a chute communicated with the T-shaped groove is formed in the outer side wall of the collecting box, the shifting sheet is connected in the chute in a sliding manner, and one end, far away from the T-shaped block, of the shifting sheet is fixedly connected with the operating handle; the plectrum is provided with a limiting component for limiting the plectrum.

Through adopting above-mentioned technical scheme, when pulling T type piece got into T type inslot completely, operating personnel held handle drive plectrum to keeping away from the outside removal of collecting box, made T type piece overcome compression spring's elastic force remove to T type inslot to carry on spacingly with the plectrum through spacing subassembly, need not operating personnel and outwards pull out the plectrum all the time when upwards pulling out first screening board, make operating personnel easy operation simple when upwards pulling out first screening board. When the T-shaped block extends out of the T-shaped groove, an operator loosens the operating handle, and the shifting piece and the T-shaped block extend out of the T-shaped groove under the action of the elastic restoring force of the compression spring.

The present invention may be further configured in a preferred embodiment as: the limiting assembly comprises a limiting block and a bolt, a first limiting hole is formed in the limiting block in the vertical direction, and a second limiting hole and a third limiting hole are formed in the shifting piece in the vertical direction; when the T-shaped block is contacted with the first screening plate, the bolt penetrates through the first limiting hole and the second limiting hole; when the T-shaped block completely slides into the T-shaped groove, the bolt penetrates through the first limiting hole and the third limiting hole.

Through adopting above-mentioned technical scheme, when T type piece stretched out T type groove and first screening board contact under compression spring's elastic force, the plectrum removed to T type inslot along with T type piece, and operating personnel passes first spacing hole and the spacing hole of second with the bolt this moment, prevents effectively that operating personnel from missing to touch outwards pulling out the plectrum. When the collecting box is taken out to first screening board as needs, operating personnel extracts first spacing hole and the spacing hole of second with the bolt, pulls operating handle again and makes T type piece get into T type inslot completely, passes first spacing hole and the spacing hole of third with the bolt after that, prevents that the plectrum from removing to the direction that is close to the collecting box inside under compression spring's elastic force, makes things convenient for operating personnel to take out first screening board from the collecting box.

The present invention may be further configured in a preferred embodiment as: the inner side wall of the collection box is fixedly connected with a support block for supporting the second screening plate; and a second handheld rod which is convenient for lifting the second screening plate is arranged on the second screening plate.

Through adopting above-mentioned technical scheme, the supporting shoe is used for supporting the second screening board, and the setting up of the handheld pole of second makes things convenient for the handheld second screening board of operating personnel on the second screening board, and then easy to assemble and take out the second screening board.

The present invention may be further configured in a preferred embodiment as: the collecting box is connected with a collecting plate for collecting fine powder, and the collecting plate is positioned below the second screening plate; the vibrating component comprises a second motor, a cam and a lifting rod, the second motor is fixedly connected to the outer side wall of the collecting box, an output shaft of the second motor is fixedly connected with the cam in a coaxial mode, a through hole for the lifting rod to penetrate through is formed in the collecting plate, the lower end of the lifting rod is abutted to the contour of the cam, and the upper end of the lifting rod penetrates through the through hole and then is connected with the second screening plate.

Through adopting above-mentioned technical scheme, the second motor drives the cam and rotates, and the cam rotates and makes the lifter go up and down along the cam profile, and the lifter goes up and down to drive the second screening board and goes up and down, reaches the purpose of vibration second screening board, makes on the second screening board the less stone of granule get into in the collecting board.

To sum up, the utility model discloses a following at least one useful technological effect:

1. the stone blocks with smaller particles fall out of the sieve holes, and the stone blocks with larger particles are blocked by the sieve barrel and do not fall out, so that the stone blocks with larger particles are prevented from falling out of the first discharge hole along with the stone blocks with smaller particles, the subsequent production of cement by using the stone block particles is more convenient, the influence of materials with larger particles on the cement production is prevented during the use, the subsequent screening and processing of the stone blocks with larger particles mixed in the stone blocks with smaller particles are avoided, and the energy consumption is reduced;

2. the screening device further screens the stone particles falling out of the second discharge port;

3. the second motor drives the cam and rotates, and the cam rotates and makes the lifter go up and down along the cam profile, and the lifter goes up and down to drive the second screening board and goes up and down, reaches the purpose of vibration second screening board, makes on the second screening board the less stone of granule get into the collecting board in.

Drawings

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

FIG. 2 is a schematic view of a drive connection;

FIG. 3 is an exploded view of the upper and lower shroud structures, showing the screen cylinder;

FIG. 4 is a schematic view of the construction of the screening apparatus;

FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4 showing a first screening plate and a second screening plate;

fig. 6 is an enlarged partial view of portion B of fig. 5, showing the positioning assembly, the pulling assembly and the spacing assembly.

In the figure, 1, a bracket; 11. a mill cylinder; 12. a first discharge port; 13. a transmission connecting pipe; 131. a through hole; 14. a first motor; 2. a screen cylinder; 21. a first half cylinder; 22. a second half cylinder; 23. screening holes; 3. a support bar; 31. a lower cover body; 311. a second discharge port; 32. an upper cover body; 4. a screening device; 41. a collection box; 411. a support block; 412. a collection plate; 413. perforating; 414. connecting grooves; 415. a T-shaped groove; 42. a first screening plate; 421. a first screening well; 422. A first hand-held lever; 43. a second screening plate; 431. a second handle bar; 432. a second screening well; 5. a vibrating assembly; 51. A second motor; 52. a cam; 53. a lifting rod; 6. a positioning assembly; 61. a T-shaped block; 611. a guide ramp; 62. a compression spring; 7. a pulling assembly; 71. a shifting sheet; 711. a second limiting hole; 712. a third limiting hole; 72. an operating handle; 73. a chute; 8. a limiting component; 81. a limiting block; 811. a first limit hole; 82. and (4) a bolt.

Detailed Description

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

Referring to fig. 1, for the utility model discloses a can screen mill of material, including support 1, rotate on support 1 and be connected with mill barrel 11.

Referring to fig. 1 and 2, a first discharge port 12 is formed at one end of the mill cylinder 11, a transmission connection pipe 13 is fixedly connected to the first discharge port 12, the transmission connection pipe 13 is coaxially arranged with the mill cylinder 11, and a plurality of through holes 131 for falling out of the material are formed in the peripheral side wall of the transmission connection pipe 13. The bracket 1 is fixedly connected with a first motor 14, and an output shaft of the first motor 14 is coaxially and fixedly connected with the transmission connecting pipe 13.

Referring to fig. 1 and 3, a screen drum 2 coaxially arranged with the transmission connecting pipe 13 is connected to the transmission connecting pipe 13, a plurality of screen holes 23 are formed in the screen drum 2, and the screen drum 2 is fixedly connected to the outer side wall of the transmission connecting pipe 13 through a first bolt. The screen drum 2 comprises a first half drum body 21 and a second half drum body 22, and the first half drum body 21 and the second half drum body 22 are fixedly connected through a second bolt.

The support rod 3 placed on the ground is arranged below the screen cylinder 2, the lower cover body 31 is fixedly connected to the support rod 3, the lower cover body 31 is located below the screen cylinder 2, the upper cover body 32 is fixedly connected to the lower cover body 31 through a third bolt, and the upper cover body 32 is located above the screen cylinder 2. The screen cylinder 2 is rotatably connected in a cavity formed by the upper cover body 32 and the lower cover body 31.

A second material outlet 311 for the material to fall out is formed below the lower cover body 31, and a screening device 4 for screening the material is arranged below the second material outlet 311.

Referring to fig. 4 and 5, the screening apparatus 4 includes a collection box 41, a first screening plate 42 and a second screening plate 43, the collection box 41, the first screening plate 42 and the second screening plate 43 are all configured as a rectangular body, and the collection box 41 is placed on the ground.

The inner side wall of the collecting box 41 is fixedly connected with a supporting block 411, the supporting block 411 is arranged in a cuboid shape, the lower end face of the second screening plate 43 is in contact with the upper end face of the supporting block 411, and the second screening plate 43 is horizontally arranged. A second holding rod 431 is fixedly connected to the upper end of the second screening plate 43, and the second screening plate 43 can be lifted upwards and taken out of the collecting box 41 conveniently. The second screening plate 43 is provided with a plurality of second screening holes 432.

A horizontally arranged collecting plate 412 is fixedly connected in the collecting box 41, and the collecting plate 412 is positioned below the second screening plate 43. The collecting box 41 under the collecting plate 412 is provided with a vibration assembly 5 (the vibration assembly 5 refers to fig. 3) for vibrating the second screening plate 43, and the vibration assembly 5 includes a second motor 51, a cam 52 and a lifting rod 53.

The second motor 51 is fixedly connected to the outer side wall of the collecting box 41, an output shaft of the second motor 51 extends into the collecting box 41 and is coaxially and fixedly connected with the cam 52, a through hole 413 for the lifting rod 53 to pass through is formed in the collecting plate 412, the cross sections of the lifting rod 53 and the through hole 413 are all set to be rectangular, the lower end of the lifting plate is abutted to the contour of the cam 52, and the upper end of the lifting plate passes through the through hole 413 and then is fixedly connected with the lower end of the second screening plate 43.

Referring to fig. 5 and 6, the first screening plate 42 is located above the second screening plate 43, the first screening plate 42 is provided with first screening holes 421, and the apertures of the first screening holes 421 are larger than the apertures of the second screening holes 432. A first holding rod 422 for conveniently lifting the first screening plate 42 is fixedly connected to the first screening plate 42.

The inner side wall of the collecting box 41 is provided with a connecting groove 414 for the first screening plate 42 to be inserted into the collecting box 41 from top to bottom.

The collecting box 41 is provided on the sidewall with a positioning assembly 6 for positioning the first screening plate 42 on the collecting box 41, and the positioning assembly 6 includes a T-shaped block 61 and a compression spring 62. The connecting groove 414 is provided with a T-shaped groove 415 along the thickness direction of the side wall of the collecting box 41, and the T-shaped block 61 is connected in the T-shaped groove 415 in a sliding manner along the thickness direction of the side wall of the collecting box 41. One end of the compression spring 62 is abutted against the bottom of the T-shaped groove 415, and the other end is abutted against one end face of the T-shaped block 61 close to the bottom of the T-shaped groove 415. The T-shaped block 61 extends outward from the T-shaped groove 415 under the elastic force of the compression spring 62, and the lower end surface of the T-shaped block 61 extending out of the T-shaped groove 415 is in contact with the upper end surface of the first screening plate 42.

The upper end surface of the T-shaped block 61 extending out of the T-shaped groove 415 is provided with a guiding inclined surface 611, and the distance from the guiding inclined surface 611 to the bottom of the T-shaped groove 415 is gradually increased in the direction from top to bottom.

The T-shaped block 61 is provided with a pulling assembly 7 for completely pulling the T-shaped block 61 into the T-shaped groove 415, the pulling assembly 7 comprises a shifting sheet 71 and an operating handle 72, the shifting sheet 71 is arranged in a cuboid shape, and the shifting sheet 71 is fixedly connected to one side of the T-shaped block 61 close to the bottom of the T-shaped groove 415. The outer side wall of the collecting box 41 is provided with a sliding groove 73 communicated with the T-shaped groove 415, the sliding groove 73 is arranged along the thickness direction of the side wall of the collecting box 41, the shifting piece 71 is connected in the sliding groove 73 in a sliding manner along the thickness direction of the side wall of the collecting box 41, and one end, far away from the T-shaped block 61, of the shifting piece 71 extends out of the sliding groove 73 and is fixedly connected with the operating handle 72.

The outer side wall of the collecting box 41 is provided with a limiting component 8 for limiting the shifting piece 71, and the limiting component 8 comprises a limiting block 81 and a bolt 82. The limiting block 81 is provided with a first limiting hole 811 arranged along the vertical direction, the shifting piece 71 is provided with a second limiting hole 711 and a third limiting hole 712 arranged along the vertical direction, and the second limiting hole 711 and the third limiting hole 712 are distributed at intervals along the length direction of the shifting piece 71.

When the T-block 61 positions the first screening plate 42, the pin 82 passes through the first and second limiting holes 811 and 711; when the first screening plate 42 needs to be taken out, and the T-shaped block 61 completely slides into the T-shaped groove 415, the bolt 82 passes through the first limiting hole 811 and the third limiting hole 712.

The implementation principle of the embodiment is as follows:

open first motor 14 and drive transmission takeover 13 and mill barrel 11 and rotate, mill barrel 11 rotates and grinds the stone in the mill barrel 11 to on stone granule falls out to transmission takeover 13 from first discharge gate 12 after the grinding, the less stone of granule falls out from sieve mesh 23, the bigger stone of granule is blocked by sieve section of thick bamboo 2, does not fall out.

When the screen cylinder 2 needs to be taken down for cleaning, the first bolt connecting the screen cylinder 2 and the transmission connecting pipe 13 is taken down, and then the second bolt connecting the first half cylinder 21 and the second half cylinder 22 is taken down, so that the first half cylinder 21 and the second half cylinder 22 can be respectively taken down from the screen cylinder 2 for cleaning.

The stone particles fall onto the first screening plate 42 firstly, and when the stone particles are larger than the aperture of the first screening holes 421, the stone particles are left above the first screening plate 42; when the stone particles are smaller than the first screening holes 421 and larger than the second screening holes 432, the stone particles pass through the first screening plate 42 and are retained on the second screening plate 43; when the stone particles are smaller than the second screening holes 432, the stone particles fall onto the collecting plate 412 below the second screening plate 43.

When the first screening plate 42 is installed, the operator first pulls the pin 82 out of the shifting piece 71 and the limiting block 81, holds the first hand-held lever 422, inserts the first screening plate 42 into the connecting groove 414 from top to bottom, in the process of inserting the first screening plate 42, the side wall of the first screening plate 42 first abuts against the guiding inclined surface 611, so that the guiding inclined surface 611 receives the acting force towards the bottom of the T-shaped groove 415, the T-shaped block 61 overcomes the elastic acting force of the compression spring 62 to move towards the bottom of the T-shaped groove 415, after the first screening plate 42 continues to move downward and passes through the T-shaped groove 415, the T-shaped block 61 is protruded out of the T-shaped groove 415 again by the elastic force of the compression spring 62, and the T-shaped block 61 is extended out of the lower end face of the T-shaped groove 415 to contact with the upper end face of the first screening plate 42, and then the bolt 82 passes through the first limiting hole 811 and the second limiting hole 711, i.e., the first screening plate 42 is completely installed.

When the first screening plate 42 needs to be taken out of the collecting box 41, an operator firstly pulls the bolt 82 out of the first limiting hole 811 and the second limiting hole 711, then pulls the operating handle 72 to enable the T-shaped block 61 to completely enter the T-shaped groove 415, then passes the bolt 82 through the first limiting hole 811 and the third limiting hole 712, and then holds the first handheld rod 422 to take out the first screening plate 42 upwards.

After removing the first sieve plate 42, the operator can take the second sieve plate 43 out of the collection box 41 by holding the second holding rod 431.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (6)

1. The utility model provides a but mill of screening material, includes support (1), sets up mill barrel (11) on support (1) and drives mill barrel (11) pivoted first motor (14), mill barrel (11) one end is provided with first discharge gate (12), be connected with transmission takeover (13) on first discharge gate (12), transmission takeover (13) are connected its characterized in that with first motor (14): the transmission connecting pipe (13) is provided with a through hole (131) for materials to fall out, the outer side wall of the transmission connecting pipe (13) is connected with a screen drum (2), the screen drum (2) is provided with a screen hole (23) for preventing the materials with particles larger than the size of the screen hole from falling out, and the screen drum (2) is fixedly connected to the transmission connecting pipe (13) through a first bolt; the screen drum (2) comprises a first half drum body (21) and a second half drum body (22), and the first half drum body (21) is fixedly connected with the first half drum body (21) through a second bolt; an upper cover body (32) is arranged above the screen drum (2), a lower cover body (31) is arranged below the screen drum (2), and the lower cover body (31) is connected with a support rod (3) which is in contact with the ground; the upper cover body (32) is fixedly connected with the lower cover body (31) through a third bolt, and the screen drum (2) is rotatably connected in a cavity formed by the upper cover body (32) and the lower cover body (31); a second material outlet (311) for falling out of the materials is formed below the lower cover body (31); a screening device (4) for screening materials is arranged below the second discharge hole (311), the screening device (4) comprises a collection box (41), a first screening plate (42) and a second screening plate (43), the first screening plate (42) is provided with a plurality of first screening holes (421), and the second screening plate (43) is provided with a plurality of second screening holes (432); the first screening plate (42) is positioned above the second screening plate (43), and the aperture of the second screening holes (432) is smaller than that of the first screening holes (421); the collecting box (41) is provided with a positioning component (6) for positioning the first screening plate (42) on the collecting box (41), and the collecting box (41) is provided with a vibration component (5) for driving the second screening plate (43) to vibrate.

2. A mill for screenable material according to claim 1, wherein: the side wall of the collection box (41) is provided with a connecting groove (414) for the first screening plate (42) to be inserted into the collection box (41) from top to bottom, a first holding rod (422) which is convenient for lifting the first screening plate (42) is fixedly connected on the first screening plate (42), a T-shaped groove (415) is formed in the side wall of the connecting groove (414), the positioning component (6) comprises a T-shaped block (61) and a compression spring (62), the T-shaped block (61) is connected in the T-shaped groove (415) in a sliding manner, one end of the compression spring (62) is connected with the bottom of the T-shaped groove (415), the other end of the compression spring is connected with the T-shaped block (61), the T-shaped block (61) extends outwards out of the T-shaped groove (415) under the elastic force of the compression spring (62), the T-shaped block (61) extends out of the lower end face of the T-shaped groove (415) and is in contact with the upper end face of the first screening plate (42); the upper end face of the T-shaped block (61) extending out of the T-shaped groove (415) is provided with a guide inclined surface (611), and the distance from the guide inclined surface (611) to the bottom of the T-shaped groove (415) is gradually increased in the direction from top to bottom; and a pulling assembly (7) for completely pulling the T-shaped block (61) into the T-shaped groove (415) is arranged on the T-shaped block (61).

3. A mill for screenable material according to claim 2, wherein: the pulling assembly (7) comprises a shifting sheet (71) and an operating handle (72), the shifting sheet (71) is fixedly connected to the T-shaped block (61), a sliding groove (73) communicated with the T-shaped groove (415) is formed in the outer side wall of the collecting box (41), the shifting sheet (71) is connected in the sliding groove (73) in a sliding manner, and one end, far away from the T-shaped block (61), of the shifting sheet (71) is fixedly connected with the operating handle (72); the shifting piece (71) is provided with a limiting component (8) used for limiting the shifting piece (71).

4. A mill for screenable material according to claim 3, wherein: the limiting assembly (8) comprises a limiting block (81) and a bolt (82), a first limiting hole (811) arranged along the vertical direction is formed in the limiting block (81), and a second limiting hole (711) and a third limiting hole (712) arranged along the vertical direction are formed in the shifting piece (71); when the T-shaped block (61) is contacted with the first screening plate (42), the bolt (82) passes through the first limiting hole (811) and the second limiting hole (711); when the T-shaped block (61) is completely slid into the T-shaped groove (415), the bolt (82) penetrates through the first limiting hole (811) and the third limiting hole (712).

5. A mill for screenable material according to claim 1, wherein: the inner side wall of the collection box (41) is fixedly connected with a supporting block (411) for supporting the second screening plate (43); the second screening plate (43) is provided with a second holding rod (431) which is convenient for lifting the second screening plate (43).

6. A mill for screenable material according to claim 5, wherein: the collecting box (41) is connected with a collecting plate (412) for collecting fine powder, and the collecting plate (412) is positioned below the second screening plate (43); the vibration component (5) comprises a second motor (51), a cam (52) and a lifting rod (53), the second motor (51) is fixedly connected to the outer side wall of the collecting box (41), an output shaft of the second motor (51) is fixedly connected with the cam (52) in a coaxial mode, a through hole (413) for the lifting rod (53) to penetrate through is formed in the collecting plate (412), the lower end of the lifting rod (53) is abutted to the contour of the cam (52), and the upper end of the lifting rod (53) penetrates through the through hole (413) and then is connected with the second screening plate (43).

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