CN115069365A

CN115069365A - Lithium iron phosphate material preparation is with nanometer powder grinding device for lithium cell positive pole

Info

Publication number: CN115069365A
Application number: CN202210697654.9A
Authority: CN
Inventors: 刘芳
Original assignee: Tianjin Runguangheng Technology Development Co ltd
Current assignee: Tianjin Runguangheng Technology Development Co ltd
Priority date: 2022-06-20
Filing date: 2022-06-20
Publication date: 2022-09-20

Abstract

The invention belongs to the technical field of battery material preparation, and particularly relates to nanoscale powder grinding equipment for preparing a lithium iron phosphate material for a lithium battery anode, which comprises a case, wherein a driving box is fixedly arranged on one side of the top end of the case, a grinding cylinder is erected on the side of the driving box, a servo motor is in threaded connection with the inside of the driving box, the output end of the servo motor is in transmission connection with a grinding main shaft through a speed reducer, a plurality of dispersion discs are fixedly arranged on the outer side of the grinding main shaft, a sealing mechanism is fixedly arranged at one end of the driving box, which is connected with the grinding cylinder, connecting rods are symmetrically distributed on the side of the sealing mechanism, and a cleaning scraper is arranged at the tail end of each connecting rod; can clear up its inner wall at grinding vessel horizontal migration's in-process, with the help of the setting of annular scraping plate, make the grinding vessel under the state that does not pull down, only can be stained with the dust that attaches to its inner wall through simple pulling repeatedly and clear up and strike off, clear up effectually, the cleaning efficiency is high.

Description

Lithium iron phosphate material preparation is with nanometer powder grinding device for lithium cell positive pole

Technical Field

The invention belongs to the technical field of battery material preparation, and particularly relates to nanoscale powder grinding equipment for preparing a lithium iron phosphate material for a lithium battery anode.

Background

The horizontal sand mill is a high-efficiency wet-process ultramicro grinding dispersion machine which is widely used in the non-metal mineral industries of coatings, dyes, paints, printing inks, medicines, ferrites, photosensitive films, pesticides, papermaking, nano materials, cosmetics and the like. The grinding device is the most widely, most advanced and most efficient grinding device for the current materials, and is generally divided into a horizontal sand mill, a basket sand mill, a vertical sand mill and the like according to the use performance. Wherein, the horizontal sand mill is suitable for products with high dispersion grinding viscosity and fine granularity requirement, and is widely applied in the nano material processing industry.

However, grinding medium grinds the material under the drive of dispersion impeller in the horizontal sand mill, produce stronger collision each other at grinding in-process solid particle and grinding medium, friction, shearing action, constantly produce the striking touching with the grinding vessel inner wall, some material can be attached to on the inner wall of grinding vessel, lead to the waste of material, and the grinding vessel is one end open-ended tubular structure, violently establish the difficult clearance of inner wall on the frame, the material is stained with for a long time and attaches at its inner wall, can form mottled convex mark, influence the grinding efficiency of grinding vessel.

Disclosure of Invention

The invention provides a nanoscale powder grinding device for preparing a lithium iron phosphate material for a lithium battery anode, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a lithium iron phosphate material preparation is with nanometer powder grinding device for lithium cell positive pole, includes the quick-witted case, the top one side of quick-witted case has set firmly the drive case, the grinding vessel has been erect to the side of drive case, the inside threaded connection of drive case has servo motor, servo motor's output is connected with the grinding main shaft through the speed reducer transmission, the outside of grinding main shaft has set firmly a plurality of dispersion impeller, the one end that the grinding vessel was connected to the drive case has set firmly sealing mechanism, sealing mechanism's side symmetric distribution is provided with the connecting rod, the tail end of connecting rod is provided with the clearance scraper blade, the outer wall of clearance scraper blade contacts with the inner wall of grinding vessel, top one side of grinding vessel set firmly with the feeder hopper of the inside intercommunication of grinding vessel, other end intermediate position department set firmly with the discharge gate of the inside intercommunication of grinding vessel, the top of the case is fixedly provided with a moving mechanism, and the grinding cylinder horizontally slides through the moving mechanism.

Preferably, a centrifugal disc is fixedly arranged at the tail end of the grinding main shaft.

Preferably, the grinding cylinder cover is arranged on the outer sides of the grinding main shaft, the connecting rod, the dispersion disc, the cleaning scraper and the centrifugal disc.

Preferably, the moving mechanism include symmetric distribution set up in the slide rail on quick-witted case top, the outside sliding connection of slide rail has the slide, the one end outside cover of grinding vessel is equipped with the bearing clamp, the bearing clamp with slide threaded connection, another pot head of grinding vessel is equipped with the support clamp, the bottom threaded connection who supports the clamp has the supporting seat, the side threaded connection of supporting seat has the support slide bar, the support slide bar with quick-witted case sliding connection.

Preferably, the sliding stroke of the sliding seat is equal to that of the supporting sliding rod, and the sliding seat is matched with the cross section area of the grinding cylinder.

Preferably, a screen is arranged on the inner side of the discharge end of the grinding cylinder.

Preferably, a plurality of dispersion discs are uniformly distributed on the grinding main shaft at equal intervals.

Preferably, the dispersion impeller is provided with a circular through hole, and a plurality of crushing teeth which are axially symmetrically distributed are fixedly arranged on the periphery of the dispersion impeller.

Preferably, the clearance scraper blade includes annular clearance dish, set up two symmetric distribution's connection shaft hole on the annular clearance dish, connect the shaft hole with connecting rod link phase-match, the outside of annular clearance dish is provided with annular scraping plate.

Preferably, the annular scraping disc is detachably connected with the annular cleaning disc.

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

1. the annular scraping disc is arranged in the grinding cylinder and is in contact with the inner wall of the grinding cylinder, the inner wall of the grinding cylinder can be cleaned in the horizontal moving process, and the grinding cylinder can be cleaned and scraped by simply and repeatedly pulling the grinding cylinder under the condition of not being detached by virtue of the arrangement of the annular scraping disc, so that the cleaning effect is good, and the cleaning efficiency is high;

2. the two connecting rods transversely arranged in the grinding cylinder and used for erecting the annular scraping disc are arranged in the grinding cylinder and do not rotate along with the rotation of the grinding main shaft, so that the turbulent flow effect is achieved when the grinding main shaft rotates to stir materials in the grinding cylinder, solid particles in the materials and grinding media generate stronger collision, friction and shearing effects, and the purposes of accelerating the grinding of fine particles and dispersing aggregates are achieved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

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

FIG. 2 is a schematic sectional view of the grinding apparatus of the present invention;

FIG. 3 is a schematic axial view of a dispersion plate of the polishing apparatus of the present invention;

FIG. 4 is a schematic axial view of the cleaning blade of the present invention.

In the figure: 1. a chassis; 2. a drive box; 21. a servo motor; 22. a speed reducer; 23. grinding the main shaft; 3. a grinding cylinder; 31. a feed hopper; 32. a discharge port; 33. supporting a clamp; 34. supporting a clamp; 35. screening a screen; 4. a moving mechanism; 41. a slide rail; 42. a slide base; 43. a supporting seat; 45. supporting the sliding rod; 5. a sealing mechanism; 6. a connecting rod; 7. a dispersion tray; 71. crushing teeth; 8. cleaning a scraper; 81. an annular cleaning disc; 811. connecting the shaft hole; 82. an annular scraping disc; 9. a centrifugal disc.

Detailed Description

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

Referring to fig. 1-4, the present invention provides the following technical solutions: a nanoscale powder grinding device for preparing a lithium iron phosphate material for a lithium battery anode comprises a case 1, a driving case 2, a grinding cylinder 3, a moving mechanism 4, a sealing mechanism 5, a dispersion disc 7, a cleaning scraper 8 and a centrifugal disc 9.

Wherein, the driving box 2 is arranged at one side of the top end of the case 1, and a grinding cylinder 3 is arranged on the side frame.

Specifically, the inside threaded connection of drive box 2 has servo motor 21, servo motor 21's output is connected with grinding spindle 23 through speed reducer 22 transmission, grinding spindle 23's the outside has set firmly a plurality of

dispersion impeller

7, 7 equidistance evenly distributed of a plurality of dispersion impeller are on grinding spindle 23, grinding cylinder 3 covers and locates grinding spindle 23 and the 7 outsides of a plurality of dispersion impeller, top one side of grinding cylinder 3 sets firmly feeder hopper 31 with the inside intercommunication of grinding cylinder 3, other end intermediate position department sets firmly the discharge gate 32 with the inside intercommunication of grinding cylinder 3.

So, during the use, lithium iron phosphate material for the lithium cell positive pole drops into grinding vessel 3 from the feeder hopper, servo motor 21 output shaft passes through the shaft coupling and drives speed reducer 22 output shaft rotatory, it is rotatory to utilize speed reducer 22 output shaft to drive grinding spindle 23, thereby it is rotatory to drive a plurality of dispersion impeller 7 that grinds equidistant evenly distributed on spindle 23, high-speed rotatory dispersion impeller 7 stirs lithium iron phosphate material for the lithium cell positive pole in the grinding vessel 3, thereby make solid particle in the material and grinding media produce stronger collision each other, friction, shearing action, reach the purpose of accelerating levigated particle and dispersed aggregate.

In addition, a centrifugal disc 9 is fixedly arranged at the tail end of the grinding main shaft 23, the centrifugal disc 9 is driven by the grinding main shaft 23 to rotate at a high speed synchronously with the dispersion disc 7, the materials ground and dispersed by the dispersion disc 7 pass through the centrifugal disc 9 to separate grinding media, and finally the materials are discharged out of the grinding barrel 3 from a discharge hole 34.

Referring to fig. 2, in a preferred embodiment, a moving mechanism 4 is fixedly arranged at the top end of a machine case 1, a grinding cylinder 3 horizontally slides along the moving mechanism 4 through the moving mechanism 4, a sealing mechanism 5 is fixedly arranged at one end of a driving case 2 connected with the grinding cylinder 3, connecting rods 6 are symmetrically arranged on the side of the sealing mechanism 5, a cleaning scraper 8 is arranged at the tail end of each connecting rod 6, and the outer wall of each cleaning scraper 8 is in contact with the inner wall of the grinding cylinder 3.

The cleaning scraper 8 is erected inside the grinding cylinder 3 through the connecting rod 6, the connecting rod 6 is transversely arranged in the grinding cylinder 3, the flow state of materials in the grinding cylinder 3 is disturbed, the turbulent flow effect is achieved, the materials move more violently in the grinding cylinder 3, the collision and shearing of the materials and grinding media are increased, and the grinding speed and the grinding efficiency of the materials are accelerated.

Wherein, moving mechanism 4 includes that symmetric distribution sets up in the slide rail 41 on quick-witted case 1 top, and the outside sliding connection of slide rail 41 has slide 42, and the one end outside cover of grinding vessel 3 is equipped with bearing clamp 33, and bearing clamp 33 and slide 42 threaded connection, another pot head of grinding vessel 3 are equipped with support clamp 34, and the bottom threaded connection who supports clamp 34 has a supporting seat 43, and the side threaded connection of supporting seat 43 has support slide bar 45, support slide bar 45 and quick-witted case 1 sliding connection.

In another embodiment, a limiting mechanism may be additionally installed between the moving mechanism 4 and the cabinet 1 to prevent the grinding drum 3 from sliding in a displacement manner under the condition of being pulled by an operator, and specifically, the limiting mechanism may adopt any manner capable of limiting the grinding drum 3 from moving along the moving mechanism 4 by an operator, including but not limited to using mechanical mechanisms such as a buckle, a lock catch, and the like.

As shown in fig. 4, the cleaning scraper 8 includes an annular cleaning disk 81, two connecting shaft holes 811 are symmetrically arranged on the annular cleaning disk 81, the connecting shaft holes 811 are matched with the connecting end of the connecting rod 6, and an annular scraping disk 82 is arranged outside the annular cleaning disk 81.

Specifically, the annular scraping disc 82 is detachably connected with the annular cleaning disc 81, so that later-stage disassembly, assembly, replacement and cleaning are facilitated.

So, after the material grinds and accomplishes, stop servo motor 21, to keeping away from one side horizontal pulling grinding vessel 3 of drive case 2, grinding vessel 3 is along 41 horizontal migration of slide rail, until spilling grinding spindle 23 that is established by grinding vessel 3 cover, a plurality of dispersion impeller 7 and centrifugal disc 9, at this moment, along with the removal of grinding vessel 3, annular scraping plate 82 on the clearance scraper blade 8 lasts and grinds grinding vessel 3 inner wall contact, and scrape the material that is stained with on grinding vessel 3 inner wall and adhere to, and grinding spindle 23 this moment, a plurality of dispersion impeller 7 and centrifugal disc 9 all expose in the outside, also be convenient for the staff to grind grinding spindle 23, the material that is stained with on a plurality of dispersion impeller 7 and the centrifugal disc 9 and clear up, be convenient for use next time.

In a specific embodiment, the sliding base 42 and the supporting slide rod 45 have the same sliding stroke and are matched with the cross-sectional area of the grinding cylinder 3; so that the grinding vessel 3 can be pulled out to the grinding spindle 23, the dispersion discs 7 and the centrifugal disc 9 covered by it.

Specifically, in an alternative embodiment, a screen 35 is disposed inside the discharge end of the grinding cylinder 3; the material exiting the grinding drum 3 may be screened so that material of an unacceptable particle size does not exit the grinding drum 3 through the discharge opening 32.

In addition, as shown in fig. 3, in an alternative embodiment, a circular through hole is formed in the dispersion plate 7, and a plurality of crushing teeth 71 are fixedly arranged on the circumferential side of the dispersion plate 7 in an axisymmetric distribution; the round through holes can be used for materials to pass through, and the crushing teeth 71 can accelerate the crushing and grinding of the materials.

The structure of the contact part of the sand mill dispersion disc 7, the grinding main shaft 23, the centrifugal disc 9 and the like with the material adopts any one of the oxidation error ceramics, engineering polyurethane, tungsten carbide and high-wear-resistant alloy steel, the oxidation error ceramics are generally adopted, the high requirement is no metal pollution, the high-end product dispersion grinding operation such as electronic materials, ceramic ink, battery materials, new nano materials and the like is adapted, the grinding cylinder 3 is made of wear-resistant ceramics, the hardness is high, the metal pollution is zero, the color is not changed, the durability is realized, and the service life is long.

The invention has the following use flow and working principle: set up the annular scraping disc 82 that contacts with the grinding vessel 3 inner wall, realize the horizontal displacement of grinding vessel 3 with the help of moving mechanism 4, can accomplish the back at the grinding, pulling grinding vessel 3 exposes and is located inside grinding main shaft 23 by its cover, a plurality of dispersion impeller 7 and centrifugal disc 9, the staff's clearance of being convenient for on the one hand grinds main shaft 23, the dust that attaches is stained with on a plurality of dispersion impeller 7 and centrifugal disc 9 surface, on the other hand, with the help of annular scraping disc 82, can be at grinding vessel 3 horizontal migration's in-process, be stained with the dust impurity who attaches to its inner wall and clear up and strike off, and is simple in structure reasonable, high durability and convenient use, and the operation is simple.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a lithium cell is nanometer powder grinding device for anodal lithium iron phosphate material preparation, includes quick-witted case (1), its characterized in that: the grinding machine is characterized in that a driving box (2) is fixedly arranged on one side of the top end of the machine case (1), a grinding drum (3) is erected on the side of the driving box (2), a servo motor (21) is connected to the inner thread of the driving box (2), the output end of the servo motor (21) is in transmission connection with a grinding main shaft (23) through a speed reducer (22), a plurality of dispersion discs (7) are fixedly arranged on the outer side of the grinding main shaft (23), a sealing mechanism (5) is fixedly arranged at one end, connected with the driving box (2), of the grinding drum (3), connecting rods (6) are symmetrically distributed on the side of the sealing mechanism (5), cleaning scrapers (8) are arranged at the tail ends of the connecting rods (6), the outer wall of each cleaning scraper (8) is in contact with the inner wall of the grinding drum (3), a feeding hopper (31) communicated with the inner portion of the grinding drum (3) is fixedly arranged on one side of the top end of the grinding drum (3), a discharge hole (32) communicated with the inside of the grinding cylinder (3) is fixedly arranged at the middle position of the other end of the grinding cylinder, a moving mechanism (4) is fixedly arranged at the top end of the case (1), and the grinding cylinder (3) horizontally slides through the moving mechanism (4).

2. The nanoscale powder grinding device for preparing lithium iron phosphate material for lithium battery positive electrode as claimed in claim 1, wherein the nanoscale powder grinding device comprises: the tail end of the grinding main shaft (23) is fixedly provided with a centrifugal disc (9).

3. The nanoscale powder grinding device for preparing the lithium iron phosphate material for the positive electrode of the lithium battery as claimed in claim 2, wherein: the grinding cylinder (3) is covered on the outer sides of the grinding main shaft (23), the connecting rod (6), the dispersion disc (7), the cleaning scraper (8) and the centrifugal disc (9).

4. The nanoscale powder grinding device for preparing the lithium iron phosphate material for the positive electrode of the lithium battery as claimed in claim 1, wherein: moving mechanism (4) including symmetric distribution set up in slide rail (41) on quick-witted case (1) top, the outside sliding connection of slide rail (41) has slide (42), the one end outside cover of grinding vessel (3) is equipped with bearing clamp (33), bearing clamp (33) with slide (42) threaded connection, the other pot head of grinding vessel (3) is equipped with support clamp (34), the bottom threaded connection who supports clamp (34) has supporting seat (43), the side threaded connection of supporting seat (43) has support slide bar (45), support slide bar (45) with quick-witted case (1) sliding connection.

5. The nanoscale powder grinding device for preparing the lithium iron phosphate material for the positive electrode of the lithium battery as claimed in claim 4, wherein the nanoscale powder grinding device comprises: the sliding stroke of the sliding seat (42) is equal to that of the supporting sliding rod (45), and the sliding stroke is matched with the cross section area of the grinding cylinder (3).

6. The nanoscale powder grinding device for preparing lithium iron phosphate material for lithium battery positive electrode as claimed in claim 1, wherein the nanoscale powder grinding device comprises: and a screen (35) is arranged on the inner side of the discharge end of the grinding cylinder (3).

7. The nanoscale powder grinding device for preparing the lithium iron phosphate material for the positive electrode of the lithium battery as claimed in claim 1, wherein: a plurality of dispersion discs (7) are evenly distributed on the grinding main shaft (23) at equal intervals.

8. The nanoscale powder grinding device for preparing the lithium iron phosphate material for the positive electrode of the lithium battery as claimed in claim 1, wherein: round through holes are formed in the dispersion disc (7), and a plurality of crushing teeth (71) which are axially symmetrically distributed are fixedly arranged on the periphery of the dispersion disc (7).

9. The nanoscale powder grinding device for preparing the lithium iron phosphate material for the positive electrode of the lithium battery as claimed in claim 1, wherein: clearance scraper blade (8) are including annular clearance dish (81), set up two symmetric distribution's connection shaft hole (811) on annular clearance dish (81), connect shaft hole (811) with connecting rod (6) link phase-match, the outside of annular clearance dish (81) is provided with annular frizing (82).

10. The nanoscale powder grinding device for preparing the lithium iron phosphate material for the positive electrode of the lithium battery as claimed in claim 9, wherein: the annular scraping disc (82) is detachably connected with the annular cleaning disc (81).