CN112452716B

CN112452716B - Multilayer screening machine is used in preparation of lithium cell cathode material

Info

Publication number: CN112452716B
Application number: CN202011176563.8A
Authority: CN
Inventors: 王中燕
Original assignee: Shandong Qianyun High Technology New Material Co ltd
Current assignee: SHANDONG QIANYUN HIGH TECHNOLOGY NEW MATERIAL Co.,Ltd.
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-12-31
Anticipated expiration: 2040-10-29
Also published as: CN112452716A

Abstract

The invention discloses a multilayer screening machine for preparing a lithium battery anode material, which belongs to the technical field of lithium battery processing and comprises a base and fixed columns, wherein a first fixed box, a second fixed box and a third fixed box are arranged on each fixed column, and a screening mechanism is arranged above each fixed box and comprises a rotating assembly, an annular table and a screening assembly; the material is sequentially put into a plurality of screening assemblies, so that the material is screened in small quantities and batches; through the height change of the bottom surface of the annular table, the shifting rod drives the screening groove to incline when moving into the second arc-shaped groove, and automatic blanking is carried out.

Description

Multilayer screening machine is used in preparation of lithium cell cathode material

Technical Field

The invention relates to the technical field of lithium battery processing, in particular to a multilayer screening machine for preparing a lithium battery anode material.

Background

Battery (Battery) refers to a device that converts chemical energy into electrical energy in a cup, tank, or other container or portion of a composite container that holds an electrolyte solution and metal electrodes to generate an electric current. Has a positive electrode and a negative electrode. With the advancement of technology, batteries generally refer to small devices that can generate electrical energy. Such as a solar cell. The performance parameters of the battery are mainly electromotive force, capacity, specific energy and resistance. The battery is used as an energy source, can obtain current which has stable voltage and current, is stably supplied for a long time and is slightly influenced by the outside, has simple structure, convenient carrying, simple and easy charging and discharging operation, is not influenced by the outside climate and temperature, has stable and reliable performance, and plays a great role in various aspects of modern social life.

The lithium battery is a primary battery using lithium metal or lithium alloy as a negative electrode material and using a non-aqueous electrolyte solution, unlike a lithium ion battery, which is a rechargeable battery, and a lithium ion polymer battery. The inventor of lithium batteries was edison. Because the chemical characteristics of lithium metal are very active, the requirements on the environment for processing, storing and using the lithium metal are very high. Therefore, lithium batteries have not been used for a long time. With the development of microelectronic technology at the end of the twentieth century, miniaturized devices are increasing, and high requirements are made on power supplies. The lithium battery has then entered a large-scale practical stage.

Lithium batteries generally have two shapes: cylindrical and square. The battery is internally in a spiral winding structure and is formed by spacing a polyethylene film isolating material which is very fine and has strong permeability between a positive electrode and a negative electrode. The positive electrode comprises a current collector consisting of lithium cobaltate (or lithium nickel cobalt manganese oxide, lithium manganate, lithium iron phosphate and the like) and an aluminum foil. The negative electrode is composed of a current collector composed of a graphitized carbon material and a copper foil. The battery is filled with organic electrolyte solution. In addition, a safety valve and a PTC element (partially cylindrical) are provided to protect the battery from damage in case of abnormal state and output short circuit.

The lithium battery mainly comprises a positive electrode material, a negative electrode material, a diaphragm, electrolyte and the like, wherein the positive electrode material accounts for more than 40% of the total cost of the lithium battery, and the performance of the positive electrode material directly influences various performance indexes of the lithium battery, so that the positive electrode material of the lithium battery occupies a core position in the lithium battery; the lithium battery anode materials which are commercialized at present comprise lithium cobaltate, lithium manganate, lithium iron phosphate, ternary materials and the like.

Before the lithium battery cathode material is prepared, raw materials need to be screened to remove impurities, unqualified materials and the like, but when impurities larger than the particle size of the material and impurities with the particle size of the material are removed, different equipment is usually needed, the material needs to be transferred in the middle, and screening is inconvenient.

Based on the above, the invention designs a multilayer screening machine for preparing a lithium battery positive electrode material, so as to solve the problems.

Disclosure of Invention

The invention aims to provide a multilayer screening machine for preparing a lithium battery positive electrode material, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a multi-layer screening machine for preparing a lithium battery anode material comprises a base, wherein vertical fixing columns are fixed in the middle of the top surface of the base, the fixing columns are of a cavity structure, a first fixing box, a second fixing box and a third fixing box are sequentially fixed on the fixing columns from top to bottom, a screening mechanism is arranged on each fixing column and above each fixing box, the screening mechanism comprises a rotating assembly arranged on each fixing column, a plurality of screening assemblies are uniformly arranged on the outer side of each rotating assembly along the circumferential direction, an annular table is fixed on each fixing column through a plurality of fixing rods, and the screening assemblies are correspondingly connected with the annular table;

the first fixing box, the second fixing box and the third fixing box are identical in structure, a first arc-shaped groove and a second arc-shaped groove are arranged in the first fixing box, the two arc-shaped grooves jointly form an annular shape, a central angle corresponding to the first arc-shaped groove is larger than that of the second arc-shaped groove, the screening time is prolonged, a first outlet and a second outlet are correspondingly arranged on the bottom surfaces of the first arc-shaped groove and the second arc-shaped groove respectively, and the bottom surfaces are inclined towards the first outlet and the second outlet.

Preferably, a feeding hopper is arranged on one side above the first fixed box, the feeding hopper is positioned above the first arc-shaped groove, a first blanking hopper and a first dust collecting groove are respectively arranged at positions, corresponding to the first outlet and the second outlet, below the first fixed box, the first blanking hopper is positioned above the first arc-shaped groove of the second fixed box, a second dust collecting groove and a second blanking hopper are respectively arranged at positions, corresponding to the first outlet and the second outlet, below the second fixed box, the second blanking hopper is positioned above the first arc-shaped groove of the third fixed box, and a first collecting groove and a second collecting groove are respectively arranged at positions, corresponding to the first outlet and the second outlet, of the third fixed box on the base.

Preferably, the central angle that first arc wall corresponds is, and the central angle that the second arc corresponds is, and the contained angle between first hopper and the first dust collecting tank position is, and the feeder hopper position becomes an contained angle with first hopper and first dust collecting tank respectively, and feeder hopper and second hopper are located same vertical direction, and first hopper and first collecting tank are located same vertical direction, and first dust collecting tank and second collecting tank are located same vertical direction, and the second dust collecting tank is located the opposite of hopper under the second.

Preferably, the feeding hopper and the second discharging hopper are fixedly connected with the base through the same supporting rod, the first discharging hopper is connected with the base fixing rod through another supporting rod, the supporting rod is also fixed on the base corresponding to the first dust collecting groove and the second dust collecting groove, the supporting plate is fixed on the supporting rod corresponding to the height position, and the first dust collecting groove and the second dust collecting groove are connected to the supporting plate in a sliding mode.

Preferably, the feeder hopper, one side that the hopper bottom surface is close to screening mechanism under first hopper and the second is equipped with the blanking pipe, and the bottom surface inclines to blanking pipe department, be equipped with seal assembly in the blanking pipe, and seal assembly includes the stopper that seals of sliding connection in blanking pipe, the top surface of sealing the stopper is established to the conical surface, and be fixed with vertical sealing rod in the middle of the top surface, the feeder hopper, the top one side correspondence of hopper is equipped with the drive chamber under first hopper and the second, the top of sealing rod stretches into in the drive chamber that corresponds, and be fixed with the spring board, be equipped with the spring between the bottom surface in spring board and the drive chamber, and be equipped with the cam on the top surface of spring board, the cam is connected with the motor, the lateral wall fixed connection in motor and drive chamber.

Preferably, the runner assembly includes rotates two rotary drums of being connected with the fixed column lateral wall, evenly be fixed with a plurality of connecting rods along the circumferencial direction on the lateral wall of rotary drum, the connecting rod one-to-one on two rotary drums, be fixed with vertical dwang between two connecting rods that correspond, and the screening subassembly sets up on the dwang, still be fixed with the ring gear on the rotary drum inner wall that is located upper portion, the internal rotation of fixed column is connected with first gear, the fixed column is stretched out to one side of first gear, and with the ring gear meshing, and first gear connection has the motor.

Preferably, the center of the inner cavity of the fixing column is rotatably connected with a driving shaft, the top end of the driving shaft is connected with a motor, driving gears are fixed at positions on the driving shaft corresponding to the three rotating assemblies, the driving gears are meshed with corresponding first gears, and the driving shaft and the driving gears enable the three rotating assemblies to synchronously work.

Preferably, the screening assembly comprises a rotating shaft arranged along the radius direction of the fixed column, the rotating shaft is rotatably connected with the rotating rod, a torsional spring is arranged at the rotating connection position, a rotating plate is fixed at the outer side end of the rotating shaft, a deflector rod is fixed at the inner side end of the rotating shaft, the inner side section of the deflector rod is vertical to the rotating shaft, the outer side section is arranged along the radius direction of the fixed column, the middle section is inclined relative to the inner side section, so that enough space is reserved between the deflector rod and the annular table to accommodate the outer side section of the adjacent deflector rod, the arrangement number of the screening assembly is increased, a shaft sleeve is rotatably connected on the outer side section of the deflector rod and is contacted with the bottom surface of the annular table under the action of the torsional spring, the deflector rod can move flexibly relative to the bottom surface of the annular table through the shaft sleeve, two horizontal sliding rods are symmetrically and parallelly fixed on the outer side surface of the rotating plate, the screening grooves are connected through the sliding rods, and the two side walls of the screening grooves are symmetrically inclined, the subsequent screening groove is convenient to rotate for blanking.

Preferably, the both sides symmetry in screening groove is fixed with the sliding sleeve, slide bar sliding connection is in the sliding sleeve, the inboard rigidity that corresponds the sliding sleeve on the slide bar has the round platform, be equipped with the spring between round platform and the sliding sleeve, it is connected with the gyro wheel to rotate on the outside end wall in screening groove, the inside wall upper portion of first arc wall evenly is fixed with a plurality of lugs, the gyro wheel corresponds with the lug and is connected, the lug can follow the rotation direction in screening groove for the protruding degree of first arc groove wall and increase gradually, thereby make the vibration range of screening groove progressively increase, improve screening effect and speed.

Preferably, the bottom surface of annular platform includes curved first bottom surface and second bottom surface, and the height of second bottom surface is less than first bottom surface, and the bilateral symmetry of first bottom surface is provided with the spigot surface of slope to be connected with first bottom surface through the spigot surface, the first bottom surface of annular platform corresponds rather than the first arc wall of the fixed case of below, and both ends extend to first arc wall department, and the second bottom surface is located the middle part of second arc wall.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the materials are screened for the first time through the screening component of the first fixed box to remove larger impurities, then screened for the second time through the screening component of the second fixed box to remove smaller impurities, finally sorted through the screening component on the third fixed box, and the functions of impurity removal and sorting are realized through a multi-layer screening structure;

2. according to the invention, materials are sequentially put into the plurality of screening assemblies, so that the materials are screened in a small quantity and in a large quantity, and compared with a mode that all the materials are concentrated in one box body for screening, the screening is more sufficient and rapid;

3. according to the invention, the deflector rod is arranged at the rear side of the screening groove, and is contacted with the bottom surface of the annular table through the deflector rod and the shaft sleeve, and the screening groove is inclined when moving into the second arc-shaped groove through the height change of the bottom surface of the annular table, so that the materials or impurities in the screening groove can be automatically discharged, and the discharging is simple and convenient;

4. according to the invention, the feed hopper, the first blanking hopper and the second blanking hopper are arranged at the corresponding positions of the three fixed boxes, and the sealing components are arranged in the feed hopper, the first blanking hopper and the second blanking hopper, so that the rapid material transfer and the intermittent blanking are realized.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

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

FIG. 2 is a schematic side view of the present invention;

FIG. 3 is a schematic view of the position of the first stationary box of the present invention;

FIG. 4 is a schematic view of the position of a second stationary box according to the present invention;

FIG. 5 is a schematic view of the position of a third stationary box according to the present invention;

FIG. 6 is a schematic view of the rotating assembly of the present invention;

FIG. 7 is a schematic structural view of a screening assembly of the present invention;

FIG. 8 is a schematic view of the position of the tap lever and the ring table of the present invention;

FIG. 9 is a side expanded view of the annular table of the present invention;

FIG. 10 is a schematic view of the connection of the screening slot and the bump according to the present invention;

FIG. 11 is a schematic structural diagram of a bump according to the present invention;

FIG. 12 is a schematic view of the closure assembly of the present invention;

fig. 13 is a schematic view of the internal structure of the fixing post of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1-base, 101-support rod, 102-first collecting groove, 103-second collecting groove, 104-first blanking hopper, 105-first dust collecting groove, 106-feeding hopper, 107-second blanking hopper, 108-second dust collecting groove;

2-fixed column, 201-first fixed box, 202-second fixed box, 203-third fixed box, 204-first arc-shaped groove, 205-second arc-shaped groove, 206-first outlet, 207-second outlet;

3-rotating assembly, 301-rotating cylinder, 302-rotating rod, 303-connecting rod, 304-first gear, 305-driving gear, 306-driving shaft;

4-screening component, 401-rotating plate, 402-screening groove, 403-sliding rod, 404-rotating shaft, 405-deflector rod, 406-shaft sleeve, 407-roller, 408-lug, 409-sliding sleeve;

5-annular table, 501-first bottom surface, 502-guide surface, 503-second bottom surface;

6-sealing component, 601-sealing plug, 602-sealing rod, 603-spring plate, 604-cam.

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 embodiments, and all other embodiments obtained by a person of ordinary skill in the art without any creative work based on the embodiments of the present invention belong to the protection scope of the present invention.

Example one

Referring to the drawings, the present invention provides a technical solution: a multilayer screening machine for preparing a lithium battery anode material comprises a base 1, wherein a vertical fixing column 2 is fixed in the middle of the top surface of the base 1, the fixing column 2 is of a cavity structure, a first fixing box 201, a second fixing box 202 and a third fixing box 203 are sequentially fixed on the fixing column 2 from top to bottom, a screening mechanism is arranged on the fixing column 2 above each fixing box and corresponds to each fixing box, the screening mechanism comprises a rotating assembly 3 arranged on the fixing column 2, a plurality of screening assemblies 4 are uniformly arranged on the outer side of the rotating assembly 3 along the circumferential direction, an annular table 5 is fixed on the fixing column 2 through a plurality of fixing rods, and the screening assemblies 4 are correspondingly connected with the annular table 5;

the first fixed box 201, the second fixed box 202 and the third fixed box 203 are identical in structure, a first arc-shaped groove 204 and a second arc-shaped groove 205 are arranged in the first fixed box 201, the two arc-shaped grooves jointly form an annular shape, a central angle corresponding to the first arc-shaped groove 204 is larger than that of the second arc-shaped groove 205, screening time is prolonged, a first outlet 206 and a second outlet 207 are correspondingly arranged on the bottom surfaces of the first arc-shaped groove 204 and the second arc-shaped groove 205 respectively, and the bottom surfaces are inclined towards the first outlet 206 and the second outlet 207.

The working principle of the embodiment is as follows: the screening assemblies 4 are rotated through the rotating assembly 3, one side of the first arc-shaped groove 204 is a screening starting point, a certain amount of materials are sequentially added into the passing screening assemblies 4 at the starting point on the first fixed box 201, the materials are screened in the screening assemblies 4, the materials fall into the first arc-shaped groove 204 through first screening and are discharged through the first outlet 206, large impurities are remained on the screening assemblies 4, and when the materials move to the second arc-shaped groove 205, the materials are discharged and are discharged through the second outlet 207;

the materials which are screened for the first time are sequentially added into the screening assemblies 4 which pass through the starting points of the second fixed box 202, the materials are screened in the screening assemblies 4, the materials are screened for the second time, so that smaller impurities fall into the first arc-shaped groove 204 and are discharged through the first outlet 206, and when the materials left on the screening assemblies 4 move to the second arc-shaped groove 205, the materials are discharged and are discharged through the second outlet 207;

the starting point of the material screened for the second time on the third fixed box 203 is added to the screening component 4 passing through in sequence, the material is screened in the screening component 4, the material is screened for the third time, so that the smaller material falls into the first arc-shaped groove 204 and is discharged through the first outlet 206 to enter the first material collecting groove 102, when the larger material is left on the screening component 4 and moves to the second arc-shaped groove 205, the material is discharged through the second outlet 207 and enters the second material collecting groove 103, and sorting is completed.

This application is through multilayer screening structure, realizes edulcoration and the function of sorting to through with during the material drops into a plurality of screening subassemblies 4 in proper order, thereby carry out the screening of a small amount of lots to the material, compare the mode of carrying out the screening in a box of whole material concentration, the screening is abundant more, quick.

Example two

The structure of this embodiment is basically the same as embodiment one, the difference lies in, rotating assembly 3 includes two rotation section of thick bamboo 301 of being connected with the rotation of fixed column 2 lateral wall, evenly be fixed with a plurality of connecting rods 303 along the circumferencial direction on the lateral wall of rotation section of thick bamboo 301, two connecting rod 303 one-to-one on rotating section of thick bamboo 301, be fixed with vertical dwang 302 between two connecting rods 303 that correspond, and screening subassembly 4 sets up on dwang 302, still be fixed with the ring gear on the rotation section of thick bamboo 301 inner wall that is located the upper portion, the internal rotation of fixed column 2 is connected with first gear 304, fixed column 2 is stretched out to one side of first gear 304, and mesh with the ring gear, and first gear 304 is connected with the motor.

The screening component 4 comprises a rotating shaft 404 arranged along the radius direction of the fixed column 2, the rotating shaft 404 is rotatably connected with the rotating rod 302, a torsional spring is arranged at the rotating connection position, a rotating plate 401 is fixed at the outer side end of the rotating shaft 404, a deflector rod 405 is fixed at the inner side end, the inner side section of the deflector rod 405 is vertical to the rotating shaft 404, the outer side section is arranged along the radius direction of the fixed column 2, the middle section is inclined relative to the inner side section, so that enough space is reserved between the deflector rod 405 and the annular table 5 to accommodate the outer side section of the adjacent deflector rod, thereby increasing the arrangement number of the screening component 4, a shaft sleeve 406 is rotatably connected on the outer side section of the deflector rod 405, the shaft sleeve 406 is contacted with the bottom surface of the annular table 5 under the action of the torsional spring, the deflector rod 405 can move more flexibly relative to the bottom surface of the annular table 5 through the shaft sleeve 406, two horizontal sliding rods 403 are symmetrically and parallelly fixed on the outer side surface of the rotating plate 401, and are connected with a screening groove 402 through the sliding rods 403, two side walls of the screening tank 402 are symmetrically inclined, so that the subsequent screening tank 402 can rotate for blanking.

Sliding sleeves 409 are symmetrically fixed on two sides of the screening groove 402, the sliding rod 403 is slidably connected into the sliding sleeve 409, a round table is fixed on the sliding rod 403 corresponding to the inner side of the sliding sleeve 409, a spring is arranged between the round table and the sliding sleeve 409, an idler wheel 407 is rotatably connected onto the outer side end wall surface of the screening groove 402, a plurality of convex blocks 408 are uniformly fixed on the upper portion of the inner side wall of the first arc-shaped groove 204, the idler wheel 407 is correspondingly connected with the convex blocks 408, the convex degree of the convex blocks 408 relative to the wall surface of the first arc-shaped groove 204 can be gradually increased along the rotating direction of the screening groove 402, so that the vibration amplitude of the screening groove 402 is gradually increased, and the screening effect and the screening speed are improved.

The bottom surface of the annular table 5 comprises a first arc-shaped bottom surface 501 and a second bottom surface 503, the height of the second bottom surface 503 is smaller than that of the first bottom surface 501, inclined guide surfaces 502 are symmetrically arranged on two sides of the first bottom surface 501 and are connected with the first bottom surface 501 through the guide surfaces 502, the first bottom surface 501 of the annular table 5 corresponds to the first arc-shaped groove 204 of the fixing box below the first bottom surface 501, two ends of the first bottom surface extend to the first arc-shaped groove 204, and the second bottom surface 503 is located in the middle of the second arc-shaped groove 205.

When the rotating assembly 3 works, the first gear 304 is rotated by the motor, and the rotating cylinder 301 is rotated by the first gear 304 and the gear ring, so that the connecting rod 303 and the rotating rod 302 drive the screening assembly 4 to rotate;

when the screening assembly 4 works, the shaft sleeve 406 on the deflector rod 405 is in close contact with the first bottom surface 501 of the annular table 5 through the action of the torsion spring, so that the screening groove 402 is kept horizontal, the roller 407 is in contact with the bump 408 in the process that the screening groove 402 rotates around the fixed column 2, so that the screening groove 402 reciprocates to screen materials in a vibration mode, after the screening groove 402 rotates into the second arc-shaped groove 205, the shaft sleeve 406 on the deflector rod 405 is in contact with the second bottom surface 503 through the inclined guide surface 502, so that the shaft sleeve 406 drives the outer side end of the deflector rod 405 to move downwards and enables the rotating shaft 404 to rotate, so that the screening groove 402 is inclined through the rotating plate 401 and the sliding rod 403, the materials or impurities in the screening groove 402 fall down and enter the second arc-shaped groove 205 to facilitate blanking.

EXAMPLE III

The structure of this embodiment is substantially the same as that of the second embodiment, except that a driving shaft 306 is rotatably connected to the center of the inner cavity of the fixed column 2, the top end of the driving shaft 306 is connected to a motor, and driving gears 305 are fixed to the driving shaft 306 at positions corresponding to the three rotating assemblies 3, the driving gears 305 are meshed with corresponding first gears 304, and the three rotating assemblies 3 are synchronously operated through the driving shaft 306 and the driving gears 305.

When runner assembly 3 during operation, driving motor makes drive shaft 306 drive gear 305 and rotates to through the transmission of first gear 304 and ring gear, make dwang 302 isotructure drive screening groove 402 and rotate, through setting up drive shaft 306 and drive gear 305, make three runner assembly 3 synchronous motion, it is more simple and convenient to operate.

Example four

The structure of this embodiment is substantially the same as that of the second embodiment, except that a feed hopper 106 is disposed on one side above the first fixed box 201, the feed hopper 106 is located above the first arc-shaped groove 204, a first hopper 104 and a first dust collecting groove 105 are disposed below the first fixed box 201 at positions corresponding to the first outlet 206 and the second outlet 207, respectively, the first hopper 104 is located above the first arc-shaped groove 204 of the second fixed box 202, a second hopper 108 and a second hopper 107 are disposed below the second fixed box 202 at positions corresponding to the first outlet 206 and the second outlet 207, respectively, the second hopper 107 is located above the first arc-shaped groove 204 of the third fixed box 203, and a first collecting groove 102 and a second collecting groove 103 are disposed on the base 1 at positions corresponding to the first outlet 206 and the second outlet 207 of the third fixed box.

The central angle corresponding to the first arc-shaped groove 204 is 270 degrees, the central angle corresponding to the second arc is 90 degrees, the included angle between the positions of the first blanking hopper 104 and the first dust collecting groove 105 is 180 degrees, the position of the feeding hopper 106 forms a 90-degree included angle with the first blanking hopper 104 and the first dust collecting groove 105 respectively, the feeding hopper 106 and the second blanking hopper 107 are positioned in the same vertical direction, the first blanking hopper 104 and the first dust collecting groove 102 are positioned in the same vertical direction, the first dust collecting groove 105 and the second dust collecting groove 103 are positioned in the same vertical direction, and the second dust collecting groove 108 is positioned opposite to the second blanking hopper 107.

The feeding hopper 106 and the second discharging hopper 107 are fixedly connected with the base 1 through the same supporting rod 101, the first discharging hopper 104 is fixedly connected with the base 1 through another supporting rod 101, the supporting rod 101 is also fixed on the base 1 at a position corresponding to the first dust collecting groove 105 and the second dust collecting groove 108, a supporting plate is fixed on the supporting rod 101 at a position corresponding to the height, and the first dust collecting groove 105 and the second dust collecting groove 108 are connected with the supporting plate in a sliding manner.

Intermittently adding material from the feed hopper 106 to the screening assembly 4 on the first stationary bin 201, the screened material falling through the first outlet 206 into the first lower hopper 104 below for collection and intermittently adding material through the first lower hopper 104 to the plurality of screening slots 402 on the second stationary bin 202; after the materials in the second fixed box 202 pass through the screening, the materials fall from the second outlet 207, enter the second discharging hopper 107 below, and intermittently enter the screening component 4 on the third fixed box 203 for screening, so that the sorting is realized, and the continuous transfer of the materials is realized by arranging the feeding hopper 106, the first discharging hopper 104 and the second discharging hopper 107, so that the feeding of each fixed box is faster and more convenient, and the processing efficiency is improved;

the impurities in the first fixing box 201 and the second fixing box 202 are discharged through the corresponding outlets, respectively, and enter the first dust collecting groove 105 and the second dust collecting groove 108, and after more impurities are accumulated in the first dust collecting groove 105 and the second dust collecting groove 108, the impurities are taken down from the supporting plate, so that the impurities are intensively treated.

EXAMPLE five

The structure of this embodiment is substantially the same as that of the fourth embodiment, except that a blanking tube is disposed on one side of the bottom surfaces of the feeding hopper 106, the first blanking hopper 104, and the second blanking hopper 107 close to the screening mechanism, the bottom surfaces of the blanking tube are inclined toward the blanking tube, a sealing assembly 6 is disposed in the blanking tube, the sealing assembly 6 includes a sealing plug 601 slidably connected in the blanking tube, the top surface of the sealing plug 601 is set to be a conical surface, a vertical sealing rod 602 is fixed in the middle of the top surface, a driving cavity is correspondingly disposed on one side of the top of the feeding hopper 106, the first blanking hopper 104, and the second blanking hopper 107, the top end of the sealing rod 602 extends into the corresponding driving cavity, and a spring plate 603 is fixed on the top surface of the spring plate 603, a spring 604 is disposed between the bottom surfaces of the spring plate 603, the cam 604 is connected with a motor, and the motor is fixedly connected to the side wall of the driving cavity.

When the feeding hopper 106, the first discharging hopper 104 and the second discharging hopper 107 are intermittently discharged, the motor in the driving cavity is started to drive the cam 604 to rotate, so that the spring plate 603 drives the sealing rod 602 and the sealing plug 601 to reciprocate up and down under the action of the spring, the discharging pipe is intermittently opened, and the intermittent discharging of materials is realized, so that the materials are sequentially added into the passing screening groove 402.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A multilayer screening machine for preparing a lithium battery anode material comprises a base (1) and is characterized in that a vertical fixing column (2) is fixed in the middle of the top surface of the base (1), the fixing column (2) is of a cavity structure, a first fixing box (201), a second fixing box (202) and a third fixing box (203) are sequentially fixed on the fixing column (2) from top to bottom, a screening mechanism is arranged above each fixing box on the fixing column (2), the screening mechanism comprises a rotating assembly (3) arranged on the fixing column (2), a plurality of screening assemblies (4) are uniformly arranged on the outer side of the rotating assembly (3) along the circumferential direction, an annular table (5) is fixed on the fixing column (2) through a plurality of fixing rods, and the screening assemblies (4) are correspondingly connected with the annular table (5);

the first fixed box (201), the second fixed box (202) and the third fixed box (203) are identical in structure, a first arc-shaped groove (204) and a second arc-shaped groove (205) are arranged in the first fixed box (201), the two arc-shaped grooves jointly form a ring, a central angle corresponding to the first arc-shaped groove (204) is larger than that of the second arc-shaped groove (205), a first outlet (206) and a second outlet (207) are correspondingly arranged on the bottom surfaces of the first arc-shaped groove (204) and the second arc-shaped groove (205) respectively, and the bottom surfaces are inclined towards the first outlet (206) and the second outlet (207);

the screening device is characterized in that the rotating assembly (3) comprises two rotating cylinders (301) rotatably connected with the outer side wall of the fixed column (2), a plurality of connecting rods (303) are uniformly fixed on the outer side wall of each rotating cylinder (301) along the circumferential direction, the connecting rods (303) on the two rotating cylinders (301) correspond to one another, a vertical rotating rod (302) is fixed between the two corresponding connecting rods (303), the screening assembly (4) is arranged on the rotating rod (302), a gear ring is further fixed on the inner wall of each rotating cylinder (301) positioned on the upper portion, a first gear (304) is rotatably connected inside the fixed column (2), one side of the first gear (304) extends out of the fixed column (2) and is meshed with the gear ring, and the first gear (304) is connected with a motor;

screening subassembly (4) are including axis of rotation (404) along fixed column (2) radius direction setting, and axis of rotation (404) rotate with dwang (302) and are connected, and rotate the junction and be equipped with the torsional spring, the outside end of axis of rotation (404) is fixed with rotor plate (401), and the medial extremity is fixed with driving lever (405), the interior section and axis of rotation (404) of driving lever (405) are perpendicular, and the lateral section sets up along the radius direction of fixed column (2), and the interlude inclines for the interior section, it is connected with axle sleeve (406) to rotate on the lateral section of driving lever (405), and axle sleeve (406) and the bottom surface contact of annular platform (5), symmetry and parallel on the lateral surface of rotor plate (401) are fixed with two horizontally slide bars (403) to be connected with screening groove (402) through slide bar (403).

2. The multi-layer screening machine for preparing the positive electrode material of the lithium battery as claimed in claim 1, wherein a feed hopper (106) is disposed at one side above the first fixing box (201), the feed hopper (106) is disposed above the first arc-shaped groove (204), a first hopper (104) and a first dust collecting groove (105) are disposed below the first fixing box (201) at positions corresponding to the first outlet (206) and the second outlet (207), respectively, the first hopper (104) is disposed above the first arc-shaped groove (204) of the second fixing box (202), a second dust collecting groove (108) and a second hopper (107) are disposed below the second fixing box (202) at positions corresponding to the first outlet (206) and the second outlet (207), respectively, the second hopper (107) is disposed above the first arc-shaped groove (204) of the third fixing box (203), and the first outlet (206) and the second outlet (207) of the third fixing box are correspondingly disposed on the base (1), respectively A material collecting groove (102) and a second material collecting groove (103).

3. The multi-layer screening machine for preparing the positive electrode material of the lithium battery, as recited in claim 2, wherein the first arc-shaped groove (204) corresponds to a central angle of 270 °, the second arc-shaped groove corresponds to a central angle of 90 °, the first blanking hopper (104) and the first dust collecting groove (105) are located at an included angle of 180 °, the feeding hopper (106) is located at an included angle of 90 ° with the first blanking hopper (104) and the first dust collecting groove (105), the feeding hopper (106) and the second blanking hopper (107) are located in the same vertical direction, the first blanking hopper (104) and the first dust collecting groove (102) are located in the same vertical direction, the first dust collecting groove (105) and the second dust collecting groove (103) are located in the same vertical direction, and the second dust collecting groove (108) is located opposite to the second blanking hopper (107).

4. The multi-layer screening machine for preparing the positive electrode material of the lithium battery as claimed in claim 3, wherein the feeding hopper (106) and the second discharging hopper (107) are fixedly connected with the base (1) through the same supporting rod (101), the first discharging hopper (104) is fixedly connected with the base (1) through another supporting rod (101), the supporting rod (101) is also fixedly arranged on the base (1) corresponding to the first dust collecting groove (105) and the second dust collecting groove (108), a supporting plate is fixedly arranged on the supporting rod (101) corresponding to the height position, and the first dust collecting groove (105) and the second dust collecting groove (108) are slidably connected to the supporting plate.

5. The multilayer screening machine for preparing the lithium battery cathode material as claimed in claim 3, wherein a blanking pipe is arranged on one side of the bottom surfaces of the feeding hopper (106), the first blanking hopper (104) and the second blanking hopper (107) close to the screening mechanism, the bottom surface of the blanking pipe inclines towards the blanking pipe, a sealing assembly (6) is arranged in the blanking pipe, the sealing assembly (6) comprises a sealing plug (601) which is slidably connected in the blanking pipe, the top surface of the sealing plug (601) is a conical surface, a vertical sealing rod (602) is fixed in the middle of the top surface, one side of the top of the feeding hopper (106), the first blanking hopper (104) and the second blanking hopper (107) is correspondingly provided with a driving cavity, the top end of the sealing rod (602) extends into the corresponding driving cavity and is fixed with a spring plate (603), and a spring is arranged between the spring plate (603) and the bottom surface of the driving cavity, and the top surface of the spring plate (603) is provided with a cam (604), the cam (604) is connected with a motor, and the motor is fixedly connected with the side wall of the driving cavity.

6. The multilayer screening machine for preparing the positive electrode material of the lithium battery as claimed in claim 1, wherein a driving shaft (306) is rotatably connected to the center of the inner cavity of the fixed column (2), a motor is connected to the top end of the driving shaft (306), and driving gears (305) are fixed to the driving shaft (306) at positions corresponding to the three rotating assemblies (3), wherein the driving gears (305) are meshed with the corresponding first gears (304).

7. The multi-layer screening machine for preparing the lithium battery positive electrode material as claimed in claim 1, wherein sliding sleeves (409) are symmetrically fixed to two sides of the screening groove (402), the sliding rod (403) is slidably connected into the sliding sleeves (409), a circular truncated cone is fixed to the sliding rod (403) corresponding to the inner side of the sliding sleeve (409), a spring is arranged between the circular truncated cone and the sliding sleeves (409), a roller (407) is rotatably connected to the outer side end wall surface of the screening groove (402), a plurality of bumps (408) are uniformly fixed to the upper portion of the inner side wall of the first arc-shaped groove (204), and the roller (407) is correspondingly connected to the bumps (408).

8. The multilayer screening machine for preparing the positive electrode material of the lithium battery as claimed in claim 1, wherein the bottom surface of the annular table (5) comprises a first arc-shaped bottom surface (501) and a second arc-shaped bottom surface (503), the height of the second bottom surface (503) is smaller than that of the first bottom surface (501), inclined guide surfaces (502) are symmetrically arranged on two sides of the first bottom surface (501) and are connected with the first bottom surface (501) through the guide surfaces (502), the first bottom surface (501) of the annular table (5) corresponds to the first arc-shaped groove (204) of the fixing box below the first bottom surface, two ends of the first bottom surface extend to the first arc-shaped groove (204), and the second bottom surface (503) is located in the middle of the second arc-shaped groove (205).