Carbon nanotube conductive slurry impurity removal device and impurity removal method

Abstract

The present invention relates to the technical field of slurry production equipment, and specifically to a carbon nanotube conductive slurry impurity removal device and impurity removal method, the impurity removal device includes a bracket and an impurity removal barrel, the impurity removal barrel includes a first barrel and a second barrel, a plurality of magnetic bars are arranged in the first barrel, the top of the magnetic bar is located in an open opening arranged at the top of the first barrel and is flush with the top of the outer wall of the first barrel, a lifting sleeve is coaxially installed in the impurity removal barrel, a scraper plate and a blocking cover plate are coaxially arranged on the lifting sleeve, and the magnetic bars are respectively inserted into the second through holes arranged on the scraper plate; the bracket is located at the top of the impurity removal barrel and a magnetic waste collection unit is arranged. In this technical solution, the magnetic impurities and non-magnetic impurities in the slurry are filtered in the first barrel and the second barrel of the impurity removal barrel respectively, and the reciprocating movement of the scraper plate transports the magnetic impurities adsorbed on the magnetic bar to the outside of the impurity removal barrel and is cleaned and collected by the magnetic waste collection unit.

Description

Technical Field

[0001] The invention relates to the technical field of slurry production equipment, and in particular to a carbon nanotube conductive slurry impurity removal device and impurity removal method. Background Art

[0002] In the lithium-ion battery industry, preparing carbon nanotubes into conductive slurry as a conductive additive for the positive electrode can significantly improve the cycle life and rate performance of the battery. During the preparation and transportation of carbon nanotube conductive slurry, other impurities and magnetic impurities are easily mixed in. Since carbon nanotubes have good electrical properties, in the positive electrode material, magnetic impurities have a direct impact on the self-discharge of the battery. The content of magnetic impurities is proportional to the self-discharge rate of the battery, that is, the higher the content of magnetic impurities, the greater the self-discharge rate of the manufactured battery. In addition, the presence of other large particle impurities will have an adverse effect on the coating process in the preparation of positive electrode materials. Therefore, it is necessary to remove impurities from the slurry during the processing of carbon nanotube conductive slurry. Summary of the invention

[0003] In view of the above problems, it is necessary to provide a carbon nanotube conductive slurry impurity removal device and impurity removal method to address the existing technical problems.

[0004] In order to solve the problems of the prior art, the technical solution adopted by the present invention is:

[0005] A carbon nanotube conductive slurry impurity removal device comprises a bracket and an impurity removal cylinder mounted on the bracket, the impurity removal cylinder comprises a first cylinder body and a second cylinder body coaxially arranged from top to bottom, the inner diameter of the second cylinder body is smaller than the inner diameter of the first cylinder body, the first cylinder body and the second cylinder body are connected by a conical cylinder body, a feed pipe is arranged on the first cylinder body, and a filter plate and a discharge pipe are arranged on the second cylinder body; a mounting plate is fixedly installed in the second cylinder body of the impurity removal cylinder, the mounting plate is located above the filter plate, a plurality of first through holes are arranged on the mounting plate, a plurality of vertically arranged magnetic rods are fixedly installed on the mounting plate, the magnetic rods are distributed at equal angles around the axis of the impurity removal cylinder, the top ends of the magnetic rods are located in an open opening arranged at the top of the first cylinder body and are aligned with the outer wall of the first cylinder body. The top is flush, and the inner diameter of the open mouth is the same as the inner diameter of the upper part of the second cylinder; a lifting sleeve is coaxially installed in the debris removing cylinder, and a scraper plate and a sealing cover plate are coaxially arranged on the lifting sleeve, the scraper plate is located inside the debris removing cylinder, and the sealing cover plate is located on the top of the debris removing cylinder. When the scraper plate is in contact with the top of the mounting plate, the sealing cover plate is in contact with the open mouth of the debris removing cylinder, and the outer diameter of the scraper plate is the same as the inner diameter of the upper part of the second cylinder, and the magnetic bars are respectively inserted into the second through holes arranged on the scraper plate; a linear drive for driving the lifting sleeve to move vertically along the axis is arranged on the bracket, and the scraper plate can move up to the open mouth and be flush with the top of the first cylinder, and the bracket is located at the top of the debris removing cylinder and is provided with a magnetic waste collection unit for scraping magnetic impurities on the scraper plate.

[0006] Preferably, the magnetic waste collection unit includes a cleaning scraper, a movable seat and a fixed ring, the fixed ring surrounds the outer wall of the impurity removal barrel, the axis of the fixed ring is in the same straight line as the axis of the impurity removal barrel, and the movable seat moves along the fixed ring; the cleaning scraper extends along the radial direction of the impurity removal barrel, the bottom of the cleaning scraper fits the top outer wall of the first barrel, a guide sleeve is provided on the movable seat, the cleaning scraper is slidably installed in the guide sleeve and moves radially along the impurity removal barrel, a right-angle scraper perpendicular to the cleaning scraper is provided at one end of the cleaning scraper facing the axis of the impurity removal barrel, and a tooth groove is provided on the side of the cleaning scraper away from the right-angle scraper; the magnetic waste collection unit also includes a collection box fixedly installed on one side of the outer wall of the first barrel.

[0007] Preferably, a first gear is rotatably mounted on the movable seat, the axis of the first gear is vertically arranged, the first gear is meshedly connected with the tooth groove of the cleaning scraper, and a first rotating driver that drives the first gear to rotate is also arranged on the movable seat.

[0008] Preferably, at least two vertical limit columns are provided on the movable seat, and the limit columns are inserted in the limit ring groove provided on the upper side of the fixed ring; a second gear is rotatably installed on the movable seat, the axis of the second gear is vertically arranged, an internal tooth groove is provided on the inner wall of the fixed ring, the second gear is meshingly connected with the internal tooth groove of the fixed ring, and a second rotation driver is provided on the movable seat to drive the second gear to rotate.

[0009] Preferably, non-magnetic end caps are provided at both ends of the magnetic rod, the outer diameter of the non-magnetic end caps is the same as the outer diameter of the magnetic rod, the non-magnetic end caps located at the bottom of the magnetic rod are fixedly mounted on the mounting plate, and the top of the non-magnetic end caps located at the top of the magnetic rod are flush with the top of the first cylinder; threaded sections are coaxially provided at the upper and lower ends of the magnetic rod, and screw holes are provided on the non-magnetic end caps, and the magnetic rod is spirally inserted into the screw holes of the non-magnetic end caps through the threaded sections.

[0010] Preferably, the lifting sleeve is located below the sealing cover plate and is provided with a plurality of spiral stirring blades; a spline shaft is rotatably mounted on the bracket, the axis of the spline shaft is in the same straight line as the axis of the impurity removal barrel, the lifting sleeve is coaxially sleeved on the spline shaft, and a third rotary drive for driving the spline shaft to rotate is provided on the bracket.

[0011] Preferably, a limiting ring is coaxially arranged on the scraper plate, a mounting seat is arranged on the outer wall of the lifting sleeve, and the scraper plate is rotatably mounted on the mounting seat via the limiting ring.

[0012] Preferably, a connecting piece is rotatably mounted on the top of the lifting sleeve, and the connecting piece is fixedly connected to the working end of the linear drive.

[0013] A carbon nanotube conductive slurry impurity removal method is applied to a carbon nanotube conductive slurry impurity removal device, comprising the following steps:

[0014] Step 1: inject a certain amount of slurry into the first cylinder of the impurity removal cylinder through the feed pipe of the impurity removal cylinder. At this time, the linear drive drives the lifting sleeve to move until the scraper plate fits the mounting plate, and the sealing cover plate seals the open port. The slurry is in the first cylinder of the impurity removal cylinder, and the magnetic rod absorbs the magnetic impurities in the slurry;

[0015] Step 2: The linear drive drives the lifting sleeve to move upward until the scraper plate is flush with the top of the first cylinder. The scraper plate scrapes off the magnetic impurities adsorbed on the surface of the magnetic rod during the upward movement. The slurry in the first cylinder passes through the conical cylinder and enters the second cylinder. The filter plate filters the non-magnetic impurities, and the filtered slurry is discharged through the discharge pipe.

[0016] Step 3: The magnetic waste collection unit removes magnetic impurities on the scraper plate on the outer wall of the first cylinder;

[0017] Step 4: The linear actuator drives the lifting sleeve to move downward and reset, and repeats steps 1 to 3 until all slurry impurities are removed.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] Firstly, the magnetic impurities and non-magnetic impurities in the slurry of the present invention are filtered in the first cylinder and the second cylinder of the impurity removal cylinder respectively to realize the classified collection of impurities. The reciprocating movement of the scraper plate transports the magnetic impurities adsorbed on the magnetic rod to the outside of the impurity removal cylinder and is cleaned and collected by the magnetic waste collection unit, which can ensure the subsequent adsorption efficiency of the magnetic impurities in the slurry by the magnetic rod.

[0020] Secondly, the cleaning scraper in the present invention is slidably installed in the guide sleeve of the moving seat and can move radially along the impurity removal cylinder. The moving seat drives the cleaning scraper to move along the fixed ring for one circle, which can push the magnetic impurities on the scraper to one side of the cleaning scraper. Then, in the process of resetting the cleaning scraper, the right-angle scraper on the top of the cleaning scraper drives the magnetic impurities to move with the cleaning scraper until the right-angle scraper pushes the magnetic impurities to the collection box installed on one side of the outer wall of the impurity removal cylinder for collection, thereby avoiding the impurities remaining after the scraper enters the first cylinder body affecting the efficiency of subsequent magnetic suction impurity removal.

[0021] Thirdly, when the scraper plate in the present invention moves up along the magnetic rod and pushes the magnetic impurities to the non-magnetic end, the magnetic rod releases the adsorption of the magnetic impurities, and the magnetic impurities accumulate on the scraper plate without being affected by external forces. When the cleaning scraper plate moves to clean the magnetic impurities on the scraper plate, the magnetic impurities can be easily driven to move. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional diagram of a carbon nanotube conductive slurry impurity removal device in a first working state;

[0023] Figure 2 yes Figure 1 A local enlarged view of point A;

[0024] Figure 3 It is a front view of a carbon nanotube conductive slurry impurity removal device in a first working state;

[0025] Figure 4 yes Figure 3 A cross-sectional view of the section at BB;

[0026] Figure 5 It is a three-dimensional diagram of a carbon nanotube conductive slurry impurity removal device in a second working state;

[0027] Figure 6 yes Figure 5 A partial enlarged view of point C;

[0028] Figure 7 It is a side view of a carbon nanotube conductive slurry impurity removal device in a second working state;

[0029] Figure 8 yes Figure 7 Cross-sectional view at DD of FIG.

[0030] Fig. 9 yes Figure 8 A local enlarged view of point E;

[0031] Fig.10 It is a three-dimensional structural exploded diagram of a carbon nanotube conductive slurry impurity removal device;

[0032] Fig.11 yes Fig.10 A partial enlarged view of point F.

[0033] The numbers in the figure are: 1, bracket; 11, linear drive; 12, spline shaft; 13, third rotary drive; 2, impurity removal cylinder; 21, first cylinder; 211, conical cylinder; 212, feed pipe; 213, open mouth; 22, second cylinder; 221, filter plate; 222, discharge pipe; 223, mounting plate; 224, first through hole; 3, magnetic rod; 31, non-magnetic end; 311, screw hole; 312, threaded section; 4, lifting sleeve; 41, scraper plate; 411, second through hole ; 412, limit ring; 42, sealing cover; 43, spiral stirring blade; 44, mounting seat; 45, connecting piece; 5, magnetic waste collection unit; 51, cleaning scraper; 511, right-angle scraper; 512, tooth groove; 52, movable seat; 521, guide sleeve; 522, limit column; 53, fixing ring; 531, limit ring groove; 532, inner tooth groove; 54, collecting box; 55, first gear; 551, first rotary drive; 56, second gear; 561, second rotary drive. DETAILED DESCRIPTION

[0034] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0035] Reference Figures 1 to 11 :

[0036] A carbon nanotube conductive slurry impurity removal device comprises a bracket 1 and an impurity removal barrel 2 mounted on the bracket 1, wherein the impurity removal barrel 2 comprises a first barrel 21 and a second barrel 22 coaxially arranged from top to bottom, wherein the inner diameter of the second barrel 22 is smaller than the inner diameter of the first barrel 21, and the first barrel 21 and the second barrel 22 are connected via a conical barrel 211, wherein a feed pipe 212 is arranged on the first barrel 21, and a filter plate 221 and a discharge pipe 222 are arranged on the second barrel 22; a mounting plate 223 is fixedly mounted in the second barrel 22 of the impurity removal barrel 2, wherein the mounting plate 223 is located above the filter plate 221, and a plurality of first through holes 224 (such as Fig.10 As shown in the figure, a plurality of vertically arranged magnetic rods 3 are fixedly mounted on the mounting plate 223, and the magnetic rods 3 are distributed at equal angles around the axis of the impurity removal cylinder 2. The top of the magnetic rod 3 is located in the open port 213 set at the top of the first cylinder 21 and is flush with the top of the outer wall of the first cylinder 21. The inner diameter of the open port 213 is the same as the inner diameter of the upper part of the second cylinder 22. A lifting sleeve 4 is coaxially mounted in the impurity removal cylinder 2, and a scraper plate 41 and a blocking cover plate 42 are coaxially mounted on the lifting sleeve 4. The scraper plate 41 is located inside the impurity removal cylinder 2, and the blocking cover plate 42 is located at the top of the impurity removal cylinder 2. When the bracket 1 is fitted over the mounting plate 223, the blocking cover plate 42 fits the open opening 213 of the impurity removal cylinder 2, the outer diameter of the scraper plate 41 is the same as the inner diameter of the upper part of the second cylinder 22, and the magnetic rods 3 are respectively inserted into the second through holes 411 set on the scraper plate 41; the bracket 1 is provided with a linear driver 11 for driving the lifting sleeve 4 to move vertically along the axis, the scraper plate 41 can move up to the open opening 213 and be flush with the top of the first cylinder 21, and the bracket 1 is located at the top of the impurity removal cylinder 2 and is provided with a magnetic waste collection unit 5 for scraping off magnetic impurities on the scraper plate 41.

[0037] When the impurity removal device of the present invention is in use, the staff injects a certain amount of slurry into the first cylinder 21 through the feed pipe 212 of the impurity removal cylinder 2. At this time, the linear drive 11 drives the lifting sleeve 4 to move to the position where the scraper plate 41 is in contact with the mounting plate 223. At this time, the scraper plate 41 blocks the first through hole 224 on the mounting plate 223 to ensure that all the slurry is located in the first cylinder 21. The magnetic rod 3 installed on the mounting plate 223 is located in the first cylinder 21 and extends to the first cylinder 21. At the open mouth 213, the magnetic attraction on the surface of the magnetic rod 3 can adsorb the magnetic impurities in the slurry. The magnetic impurities are all located on the surface of the magnetic rod 3. The scraper plate 41 on the lifting sleeve 4 has a second through hole 411 coaxial with the magnetic rod 3. The magnetic rod 3 is inserted into the second through hole 411. The second through hole 411 fits the surface of the magnetic rod 3. When the magnetic rod 3 is adsorbed, the linear drive 11 drives the lifting sleeve 4 to move upward. During the upward movement of the scraper plate 41, the second through hole 411 removes the magnetic impurities on the surface of the magnetic rod 3. Scrape down, when the scraper plate 41 moves up to the conical cylinder 211, the first cylinder 21 and the second cylinder 22 are connected, and the slurry enters the second cylinder 22 through the conical cylinder 211. The first through hole 224 on the mounting plate 223 can make the slurry entering the second cylinder 22 move downward through the first through hole 224 and contact the filter plate 221. The filter plate 221 filters other impurities in the slurry, and the filtered slurry is discharged from the impurity removal cylinder 2 through the discharge pipe 222; the linear drive 1 The scraper plate 41 is driven to move upward to the opening 213 at the top of the first cylinder 21. The upper surface of the scraper plate 41 is flush with the top of the magnetic rod 3 and the top outer wall of the first cylinder 21. Therefore, the scraper plate 41 pushes the magnetic impurities adsorbed on the surface of the magnetic rod 3 out of the impurity removal cylinder 2. At this time, the magnetic waste collection unit 5 outside the impurity removal cylinder 2 can clean and collect the magnetic impurities on the surface of the scraper plate 41. When the linear drive 11 drives the lifting sleeve 4 to reset, the slurry can be added again. The linear drive 11 in this embodiment can be a pneumatic cylinder, an oil cylinder or an electric push rod, etc. During the process of injecting the slurry into the first cylinder 21, the sealing cover plate 42 of the lifting sleeve 4 seals the open port 213 of the first cylinder 21. In this embodiment, the magnetic impurities and non-magnetic impurities in the slurry are filtered in the first cylinder 21 and the second cylinder 22 of the impurity removal cylinder 2 respectively, so as to realize the classified collection of impurities. The reciprocating movement of the scraper plate 41 transports the magnetic impurities adsorbed on the magnetic rod 3 to the outside of the impurity removal cylinder 2 and is cleaned and collected by the magnetic waste collection unit 5, so as to ensure the subsequent adsorption efficiency of the magnetic impurities in the slurry by the magnetic rod 3.

[0038] In order to solve the problem of how the magnetic waste collection unit 5 cleans the magnetic impurities on the scraper plate 41, the following features are specifically set:

[0039] The magnetic waste collection unit 5 includes a cleaning scraper 51, a movable seat 52 and a fixed ring 53. The fixed ring 53 surrounds the outer wall of the impurity removal barrel 2. The axis of the fixed ring 53 is in the same straight line as the axis of the impurity removal barrel 2, and the movable seat 52 moves along the fixed ring 53; the cleaning scraper 51 extends along the radial direction of the impurity removal barrel 2, and the bottom of the cleaning scraper 51 is in contact with the top outer wall of the first cylinder 21. A guide sleeve 521 is provided on the movable seat 52. The cleaning scraper 51 is slidably installed in the guide sleeve 521 and moves radially along the impurity removal barrel 2. A right-angle scraper 511 perpendicular to the cleaning scraper 51 is provided at one end of the cleaning scraper 51 facing the axis of the impurity removal barrel 2, and a tooth groove 512 is provided on the side of the cleaning scraper 51 away from the right-angle scraper 511; the magnetic waste collection unit 5 also includes a collection box 54 fixedly installed on one side of the outer wall of the first cylinder 21.

[0040] In this embodiment, the fixed ring 53 of the magnetic waste collection unit 5 is arranged around the outer wall of the impurity removal barrel 2, and the movable seat 52 is slidably installed on the fixed ring 53 so as to drive the cleaning scraper 51 to rotate around the axis of the impurity removal barrel 2. The cleaning scraper 51 in this embodiment is slidably installed in the guide sleeve 521 of the movable seat 52 and can move radially along the impurity removal barrel 2. When the lifting sleeve 4 moves, the cleaning scraper 51 moves to one side of the impurity removal barrel 2 to avoid contact with the blocking cover plate 42. When the scraper plate 41 moves to be flush with the top of the first cylinder 21, the cleaning scraper 51 moves radially along the impurity removal barrel 2 until it contacts the lifting sleeve 4, and then the movable seat 52 drives the cleaning scraper 51 along the fixed ring 5 After the cleaning scraper 51 moves one circle, the bottom of the cleaning scraper 51 adheres to the surface of the scraper plate 41 and rotates one circle, so that the magnetic impurities on the scraper plate 41 can be pushed to one side of the cleaning scraper 51. Then, during the resetting process of the cleaning scraper 51, the right-angle scraper 511 at the top of the cleaning scraper 51 drives the magnetic impurities to move with the cleaning scraper 51 until the right-angle scraper 511 pushes the magnetic impurities to the collecting box 54 installed on one side of the outer wall of the impurity removal cylinder 2 for collection. The magnetic waste collection unit 5 in this embodiment can clean all the impurities accumulated on the scraper plate 41 into the collecting box 54, so as to avoid the impurities remaining after the scraper plate 41 enters the first cylinder 21 affecting the efficiency of subsequent magnetic impurity removal.

[0041] In order to solve the problem of how to realize the movement of the cleaning blade 51, the following features are specifically set:

[0042] A first gear 55 is rotatably mounted on the movable seat 52 . The axis of the first gear 55 is vertically arranged. The first gear 55 is meshedly connected with the tooth groove 512 of the cleaning blade 51 . A first rotation driver 551 is also arranged on the movable seat 52 to drive the first gear 55 to rotate.

[0043] The first gear 55 is rotatably mounted on the movable seat 52 in this embodiment. The first gear 55 is located on one side of the guide sleeve 521 or at an opening set on the guide sleeve 521. The first gear 55 is meshed and connected with the tooth groove 512 set on one side of the cleaning scraper 51. Therefore, when the first rotating driver 551 drives the first gear 55 to rotate, the cleaning scraper 51 can be driven to move radially along the impurity removal barrel 2. The first rotating driver 551 can be a servo motor, and the guide sleeve 521 guides the movement of the cleaning scraper 51.

[0044] In order to solve the problem of how to drive the movable seat 52 to move along the fixed ring 53, the following features are specifically set:

[0045] At least two vertical limit columns 522 are provided on the movable seat 52, and the limit columns 522 are limitedly inserted in the limit ring groove 531 provided on the upper side of the fixed ring 53; a second gear 56 is rotatably installed on the movable seat 52, the axis of the second gear 56 is vertically arranged, and an inner tooth groove 532 is provided on the inner wall of the fixed ring 53. The second gear 56 is meshed and connected with the inner tooth groove 532 of the fixed ring 53, and a second rotation driver 561 for driving the second gear 56 to rotate is provided on the movable seat 52.

[0046] The movable seat 52 in this embodiment is guided to move by at least two limiting columns 522 inserted in the limiting ring groove 531 on the upper side of the fixed ring 53, so as to ensure that the movable seat 52 drives the cleaning scraper 51 to move along the fixed ring 53, and the second gear 56 rotatably mounted on the movable seat 52 is meshed with the inner tooth groove 532 on the inner wall of the fixed ring 53. When the second rotary driver 561 drives the second gear 56 to rotate, the movable seat 52 can move along the fixed ring 53, so that the cleaning scraper 51 can scrape the magnetic impurities on the surface of the scraper plate 41 to the side of the cleaning scraper 51 where the right-angle scraper 511 is provided, so as to facilitate the subsequent movement to the collection box 54. The second gear 56 can be a servo motor.

[0047] In order to achieve the purpose that when the scraper plate 41 moves to the top of the magnetic bar 3, the magnetic bar 3 does not adsorb the magnetic impurities, thereby ensuring the cleaning efficiency of the magnetic waste collection unit 5, the following features are specifically set:

[0048] The magnetic rod 3 is provided with non-magnetic end heads 31 at both ends, and the outer diameter of the non-magnetic end heads 31 is the same as the outer diameter of the magnetic rod 3. The non-magnetic end heads 31 located at the bottom of the magnetic rod 3 are fixedly mounted on the mounting plate 223, and the top end of the non-magnetic end heads 31 located at the top of the magnetic rod 3 is flush with the top end of the first cylinder 21; the upper and lower ends of the magnetic rod 3 are coaxially provided with threaded sections 312, and the non-magnetic end heads 31 are provided with screw holes 311, and the magnetic rod 3 is screwed into the screw holes 311 of the non-magnetic end heads 31 through the threaded sections 312.

[0049] Non-magnetic end heads 31 are installed at both ends of the magnetic rod 3. The non-magnetic end heads 31 are made of non-magnetic material. When the scraper plate 41 moves up along the magnetic rod 3 and pushes the magnetic impurities to the non-magnetic end heads 31, the magnetic rod 3 releases the adsorption of the magnetic impurities, and the magnetic impurities accumulate on the scraper plate 41 without being affected by external forces. When the cleaning scraper 51 moves to clean the magnetic impurities on the scraper plate 41, the magnetic impurities can be easily driven to move. Since the outer diameter of the non-magnetic end head 31 is the same as the outer diameter of the magnetic rod 3, the outer wall of the non-magnetic end head 31 fits the inner wall of the second through hole 411 to prevent the magnetic impurities from falling into the impurity removal barrel 2 from the second through hole 411. The non-magnetic end heads 31 in this embodiment are spirally installed on the threaded sections 312 at both ends of the magnetic rod 3 through the screw holes 311, and the operation is simple.

[0050] In order to solve the problem of how to make the slurry in the first cylinder 21 fully contact with the magnetic rod 3, the following features are specifically set:

[0051] The lifting sleeve 4 is located below the sealing cover plate 42 and is provided with a plurality of spiral stirring blades 43; a spline shaft 12 is rotatably mounted on the bracket 1, the axis of the spline shaft 12 is in the same straight line as the axis of the impurity removal barrel 2, the lifting sleeve 4 is coaxially sleeved on the spline shaft 12, and a third rotating driver 13 is provided on the bracket 1 for driving the spline shaft 12 to rotate.

[0052] The lifting sleeve 4 in this embodiment is sleeved on the spline shaft 12 set on the bracket 1, so when the third rotary driver 13 drives the spline shaft 12 to rotate, it can drive the lifting sleeve 4 to rotate. When the blocking cover 42 blocks the open port 213 of the first cylinder 21, the spiral stirring blade 43 below the blocking cover 42 is located in the first cylinder 21. When the lifting sleeve 4 rotates, the spiral stirring blade 43 stirs the slurry in the first cylinder 21, so that the slurry is fully in contact with the magnetic rod 3, and the magnetic rod 3 adsorbs the magnetic impurities in the slurry. In this embodiment, the third rotary driver 13 can be a servo motor, and the third rotary driver 13 can be connected to the spline shaft 12 through a gear set, which will not be described in detail here.

[0053] In order to solve the problem that the scraper plate 41 cannot rotate along with the lifting sleeve 4, the following features are specifically provided:

[0054] A limiting ring 412 is coaxially arranged on the scraper plate 41 , and a mounting seat 44 is arranged on the outer wall of the lifting sleeve 4 . The scraper plate 41 is rotatably mounted on the mounting seat 44 through the limiting ring 412 .

[0055] The scraper plate 41 in this embodiment is rotatably mounted on the mounting seat 44 of the lifting sleeve 4 through a limiting ring 412, so that the scraper plate 41 can remain stationary relative to the rotation of the lifting sleeve 4, and the scraper plate 41 can move in the vertical direction following the lifting sleeve 4.

[0056] In order to solve the problem that the linear drive 11 remains connected to the lifting sleeve 4 when the lifting sleeve 4 rotates, the following features are specifically provided:

[0057] A connecting piece 45 is rotatably mounted on the top of the lifting sleeve 4 , and the connecting piece 45 is fixedly connected to the working end of the linear drive 11 .

[0058] In this embodiment, the working end of the linear drive 11 is fixedly connected to the connecting piece 45, and the top end of the lifting sleeve 4 is rotatably mounted on the connecting piece 45. Therefore, when the linear drive 11 pulls the lifting sleeve 4 to move through the connecting piece 45, the lifting sleeve 4 can keep following the rotation of the spline shaft 12.

[0059] A carbon nanotube conductive slurry impurity removal method is applied to a carbon nanotube conductive slurry impurity removal device, comprising the following steps:

[0060] Step 1: inject a certain amount of slurry into the first cylinder 21 of the impurity removal cylinder 2 through the feed pipe 212 of the impurity removal cylinder 2. At this time, the linear drive 11 drives the lifting sleeve 4 to move until the scraper plate 41 is attached to the mounting plate 223, and the blocking cover plate 42 blocks the open port 213. The slurry is in the first cylinder 21 of the impurity removal cylinder 2, and the magnetic rod 3 adsorbs the magnetic impurities in the slurry;

[0061] Step 2: The linear drive 11 drives the lifting sleeve 4 to move upward until the scraper plate 41 is flush with the top of the first cylinder 21. The scraper plate 41 scrapes off the magnetic impurities adsorbed on the surface of the magnetic rod 3 during the upward movement. The slurry in the first cylinder 21 passes through the conical cylinder 211 and enters the second cylinder 22. The filter plate 221 filters the non-magnetic impurities, and the filtered slurry is discharged through the discharge pipe 222.

[0062] Step 3: The magnetic waste collection unit 5 removes the magnetic impurities on the scraper plate 41 located on the outer wall of the first cylinder 21;

[0063] Step 4: The linear drive 11 drives the lifting sleeve 4 to move downward and reset, and repeats steps 1 to 3 until all slurry impurities are removed.

[0064] Working principle: The staff injects a certain amount of slurry into the first cylinder 21 of the impurity removal cylinder 2 through the feed pipe 212 of the impurity removal cylinder 2. At this time, the linear drive 11 drives the lifting sleeve 4 to move until the scraper plate 41 fits the mounting plate 223, and the blocking cover plate 42 blocks the open port 213. The slurry is in the first cylinder 21 of the impurity removal cylinder 2, and the magnetic rod 3 adsorbs the magnetic impurities in the slurry. The linear drive 11 drives the lifting sleeve 4 to move upward until the scraper plate 41 is flush with the top of the first cylinder 21. During the upward movement of the scraper plate 41, the magnetic impurities adsorbed on the surface of the magnetic rod 3 are scraped off. The slurry in the first cylinder 21 enters the second cylinder 22 through the conical cylinder 211, and the filter plate 221 adsorbs non-magnetic impurities. The magnetic impurities are filtered, and the filtered slurry is discharged through the discharge pipe 222. The magnetic waste collection unit 5 removes the magnetic impurities on the scraper plate 41 located on the outer wall of the first cylinder 21. The movable seat 52 drives the cleaning scraper 51 to move one circle along the fixed ring 53. The bottom of the cleaning scraper 51 is in contact with the surface of the scraper plate 41 and rotates one circle to push the magnetic impurities on the scraper plate 41 to one side of the cleaning scraper 51. Then, in the process of resetting the cleaning scraper 51, the right-angle scraper 511 at the top of the cleaning scraper 51 drives the magnetic impurities to move with the cleaning scraper 51 until the right-angle scraper 511 pushes the magnetic impurities to the collection box 54 installed on one side of the outer wall of the impurity removal cylinder 2 for collection.

[0065] The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A carbon nanotube conductive slurry impurity removal device, comprising a support (1) and an impurity removal cylinder (2) mounted on the support (1), characterized in that: The impurity removal cylinder (2) comprises a first cylinder (21) and a second cylinder (22) which are coaxially arranged from top to bottom, the inner diameter of the second cylinder (22) is smaller than the inner diameter of the first cylinder (21), the first cylinder (21) and the second cylinder (22) are connected via a conical cylinder (211), a feed pipe (212) is arranged on the first cylinder (21), and a filter plate (221) and a discharge pipe (222) are arranged on the second cylinder (22); A mounting plate (223) is fixedly mounted inside the second cylinder (22) of the impurity removal cylinder (2), the mounting plate (223) being located above the filter plate (221), a plurality of first through holes (224) being provided on the mounting plate (223), a plurality of vertically arranged magnetic bars (3) being fixedly mounted on the mounting plate (223), the magnetic bars (3) being distributed at equal angles around the axis of the impurity removal cylinder (2), the top ends of the magnetic bars (3) being located in an open opening (213) provided at the top of the first cylinder (21) and being flush with the top of the outer wall of the first cylinder (21), and the inner diameter of the open opening (213) being the same as the inner diameter of the upper portion of the second cylinder (22); A lifting sleeve (4) is coaxially installed in the impurity removal barrel (2), and a scraper plate (41) and a blocking cover plate (42) are coaxially arranged on the lifting sleeve (4). The scraper plate (41) is located inside the impurity removal barrel (2), and the blocking cover plate (42) is located on the top of the impurity removal barrel (2). When the scraper plate (41) fits above the mounting plate (223), the blocking cover plate (42) fits the open opening (213) of the impurity removal barrel (2). The outer diameter of the scraper plate (41) is the same as the inner diameter of the upper portion of the second barrel (22). The magnetic rods (3) are respectively inserted into the second through holes (411) provided on the scraper plate (41); The bracket (1) is provided with a linear drive (11) for driving the lifting sleeve (4) to move vertically along the axis, the scraper plate (41) can move upward to the open opening (213) to be flush with the top of the first cylinder (21), and the bracket (1) is provided with a magnetic waste collection unit (5) for scraping off magnetic impurities on the scraper plate (41), and the magnetic waste collection unit (5) is located at the top of the impurity removal cylinder (2); The magnetic waste collection unit (5) comprises a cleaning scraper (51), a movable seat (52) and a fixed ring (53), wherein the fixed ring (53) surrounds the outer wall of the impurity removal barrel (2), the axis of the fixed ring (53) and the axis of the impurity removal barrel (2) are on the same straight line, and the movable seat (52) moves along the fixed ring (53); The cleaning scraper (51) extends in the radial direction of the impurity removal barrel (2), the bottom of the cleaning scraper (51) is in contact with the top outer wall of the first barrel (21), a guide sleeve (521) is provided on the movable seat (52), the cleaning scraper (51) is slidably mounted in the guide sleeve (521) and moves in the radial direction of the impurity removal barrel (2), a right-angle scraper (511) perpendicular to the cleaning scraper (51) is provided at one end of the cleaning scraper (51) facing the axis of the impurity removal barrel (2), and a tooth groove (512) is provided on the side of the cleaning scraper (51) away from the right-angle scraper (511); The magnetic waste collection unit (5) further comprises a collection box (54) fixedly mounted on one side of the outer wall of the first cylinder (21).

2. The carbon nanotube conductive paste impurity removal device according to claim 1, characterized in that: A first gear (55) is rotatably mounted on the movable seat (52); the axis of the first gear (55) is arranged vertically; the first gear (55) is meshedly connected with the tooth groove (512) of the cleaning scraper (51); and a first rotation driver (551) for driving the first gear (55) to rotate is also arranged on the movable seat (52).

3. The carbon nanotube conductive paste impurity removal device according to claim 1, characterized in that: At least two vertical limiting columns (522) are arranged on the movable seat (52), and the limiting columns (522) are inserted into limiting ring grooves (531) arranged on the upper side of the fixed ring (53) for limiting purposes; A second gear (56) is rotatably mounted on the movable seat (52), the axis of the second gear (56) being arranged vertically, an inner tooth groove (532) being arranged on the inner wall of the fixed ring (53), the second gear (56) being meshingly connected with the inner tooth groove (532) of the fixed ring (53), and a second rotation driver (561) for driving the second gear (56) to rotate is arranged on the movable seat (52).

4. The carbon nanotube conductive paste impurity removal device according to claim 1, characterized in that: Both ends of the magnetic rod (3) are provided with non-magnetic end heads (31), the outer diameter of the non-magnetic end heads (31) being the same as the outer diameter of the magnetic rod (3), the non-magnetic end heads (31) located at the bottom of the magnetic rod (3) being fixedly mounted on the mounting plate (223), and the top end of the non-magnetic end heads (31) located at the top of the magnetic rod (3) being flush with the top end of the first cylinder (21); The upper and lower ends of the magnetic rod (3) are coaxially provided with threaded sections (312), the non-magnetic end head (31) is provided with a screw hole (311), and the magnetic rod (3) is screwed into the screw hole (311) of the non-magnetic end head (31) through the threaded section (312).

5. The carbon nanotube conductive paste impurity removal device according to claim 1, characterized in that: The lifting sleeve (4) is located below the blocking cover plate (42) and is provided with a plurality of spiral stirring blades (43); A spline shaft (12) is rotatably mounted on the bracket (1), the axis of the spline shaft (12) and the axis of the impurity removal barrel (2) are on the same straight line, the lifting sleeve (4) is coaxially sleeved on the spline shaft (12), and a third rotation driver (13) for driving the spline shaft (12) to rotate is provided on the bracket (1).

6. The carbon nanotube conductive paste impurity removal device according to claim 5, characterized in that: A limiting ring (412) is coaxially arranged on the scraper plate (41), a mounting seat (44) is arranged on the outer wall of the lifting sleeve (4), and the scraper plate (41) is rotatably mounted on the mounting seat (44) via the limiting ring (412).

7. The carbon nanotube conductive paste impurity removal device according to claim 5, characterized in that: A connecting piece (45) is rotatably mounted on the top of the lifting sleeve (4), and the connecting piece (45) is fixedly connected to the working end of the linear drive (11).

8. A method for removing impurities from a carbon nanotube conductive paste, applied to the device for removing impurities from a carbon nanotube conductive paste as claimed in claim 1, characterized in that: The following steps are involved: Step 1: inject a certain amount of slurry into the first barrel (21) of the impurity removal barrel (2) through the feed pipe (212) of the impurity removal barrel (2); at this time, the linear drive (11) drives the lifting sleeve (4) to move until the scraper plate (41) is in contact with the mounting plate (223); the sealing cover plate (42) seals the open opening (213); the slurry is in the first barrel (21) of the impurity removal barrel (2); and the magnetic rod (3) adsorbs the magnetic impurities in the slurry; Step 2: The linear drive (11) drives the lifting sleeve (4) to move upward until the scraper plate (41) is flush with the top of the first cylinder (21); the magnetic impurities adsorbed on the surface of the magnetic rod (3) are scraped off during the upward movement of the scraper plate (41); the slurry in the first cylinder (21) passes through the conical cylinder (211) and enters the second cylinder (22); the filter plate (221) filters the non-magnetic impurities; and the filtered slurry is discharged through the discharge pipe (222); Step 3: The magnetic waste collection unit (5) removes magnetic impurities on the scraper plate (41) located on the outer wall of the first cylinder (21); Step 4: The linear drive (11) drives the lifting sleeve (4) to move downward and reset, and steps 1 to 3 are repeated until all slurry impurities are removed.

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