Multi-stage lithium iron phosphate particle screening device

Abstract

The utility model discloses a multi-stage lithium iron phosphate particle screening device, which belongs to the technical field of lithium iron phosphate processing and comprises a screening box, three groups of screens are sequentially arranged in the screening box along the vertical direction, and a transmission cleaning component is arranged above the screens. The transmission cleaning mechanism composed of the driving motor, the driving wheel, the driven wheel, the screw rods, the moving plate, the scraping plate and the rolling shaft is designed, in the screening process, the driving motor drives the driving wheel to rotate, the driving wheel drives the driven wheel to rotate through a belt, and then the driving wheel and the driven wheel drive the three screw rods to rotate. According to the lithium iron phosphate screening device, the movable plate drives the scraping plate to reciprocate in the screening box under the action of the threads, in the moving process, the rolling shaft can apply pressure to lithium iron phosphate particles mingled in the screening holes so as to push the lithium iron phosphate particles out of the screening holes, in this way, the screening net can be effectively prevented from being blocked, and the screening speed and the screening effect of the device are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium iron phosphate processing, in particular to a multi-stage lithium iron phosphate particle screening device. Background Art

[0002] Since lithium iron phosphate has the advantages of abundant raw material sources, low price, excellent high-temperature cycle performance and safety performance, lithium-ion batteries with lithium iron phosphate as the positive electrode active material have the most development prospects. From a large amount of pulping experience and industry communication feedback, the particle size distribution almost determines the processing performance of lithium iron phosphate materials. The key indicator is D50. Generally speaking, the average particle size of lithium cobalt oxide and lithium manganese oxide particles is roughly 10um-20um, and lithium iron phosphate is generally distributed in 1um-2.5um according to different processes. Therefore, in the production process of lithium-ion batteries, it is necessary to use a graded screening device to screen the lithium iron phosphate particles.

[0003] The existing multi-stage lithium iron phosphate particle screening device is used to achieve multi-stage screening of lithium iron phosphate particles by setting up multi-stage sieves. During the screening process, lithium iron phosphate particles with the same specifications as the sieve holes will be mixed in the sieve holes, and it is not convenient to clean them, which can easily lead to clogging of the sieves, affecting the screening rate and effect of the device, resulting in poor use of the device. Therefore, a multi-stage lithium iron phosphate particle screening device is urgently needed to solve the above problems. Utility Model Content

[0004] The main purpose of the utility model is to provide a multi-stage lithium iron phosphate particle screening device.

[0005] The purpose of the utility model can be achieved by adopting the following technical solutions:

[0006] A multi-stage lithium iron phosphate particle screening device comprises a screening box, wherein three groups of screens are arranged in sequence in the vertical direction in the screening box, a transmission cleaning assembly is arranged above the screens, and the transmission cleaning assembly consists of a screw, a guide rod, a movable plate, a scraper plate, a roller, a transmission box, a drive motor, a driving wheel, a belt and a driven wheel, unloading baffles are installed at both ends of the outer side wall of the screening box, and a guide plate is fixed at an angle at the bottom end of the screening box.

[0007] Preferably, a filling hopper is welded to the middle of the upper end of the screening box, and a vibrator is installed on the back wall of the screening box by bolts.

[0008] Preferably, the screens are fixed in the screening box by screws, and the screening capacities of the three groups of screens increase sequentially.

[0009] Preferably, the screw is rotatably installed between the inner walls of the screening box, the guide rod is welded between the inner walls of the screening box, the movable plate is connected to the screw by threads, and the guide rod passes through the movable plate.

[0010] Preferably, the scraping plate is welded to the bottom end of the movable plate, and the roller is rotatably installed inside the bottom end of the scraping plate.

[0011] Preferably, the transmission box is fixed to a side wall of the screening box by bolts, the output shaft of the drive motor is fixedly connected to the driving wheel, the driving wheel and the driven wheel and the driven wheels are connected by the belt, and the driving wheel and the driven wheel are respectively fixedly connected to one end of the screw.

[0012] Preferably, the unloading baffle is fixed to the side wall of the screening box by screws, and the guide plate is welded to the bottom end of the screening box.

[0013] Beneficial technical effects of the utility model:

[0014] The utility model designs a transmission cleaning mechanism consisting of a driving motor, an active wheel, a driven wheel, a screw, a movable plate, a scraping plate and a roller. During the screening process, the driving motor drives the active wheel to rotate, and the active wheel drives the driven wheel to rotate through a belt, and the two respectively drive the three groups of screws to rotate, so that the movable plate drives the scraping plate to reciprocate in the screening box under the action of the thread. During the movement, the roller can pressurize the lithium iron phosphate particles mixed in the sieve holes and push them out of the sieve holes. This method can effectively avoid clogging of the screen and improve the screening rate and screening effect of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a preferred embodiment of a multi-stage lithium iron phosphate particle screening device according to the utility model;

[0016] Figure 2 It is a schematic diagram of the internal structure of a screening box in a preferred embodiment of a multi-stage lithium iron phosphate particle screening device according to the utility model;

[0017] Figure 3 It is a structural schematic diagram of a scraping plate in a preferred embodiment of a multi-stage lithium iron phosphate particle screening device according to the utility model;

[0018] Figure 4 It is a main cross-sectional view of a transmission case in a preferred embodiment of a multi-stage lithium iron phosphate particle screening device according to the utility model.

[0019] The following are the descriptions of the reference numerals:

[0020] Screening box; 2. Discharge baffle; 3. Guide plate; 4. Vibrator; 5. Transmission cleaning assembly; 501. Transmission box; 502. Screw; 503. Guide rod; 504. Moving plate; 505. Scraping plate; 506. Roller; 507. Driving motor; 508. Driving wheel; 509. Belt; 510. Driven wheel; 6. Screen; 7. Filling hopper. DETAILED DESCRIPTION

[0021] In order to make the technical solution of the present invention more clear and specific to those skilled in the art, the present invention is further described in detail below in conjunction with embodiments and drawings, but the implementation methods of the present invention are not limited thereto.

[0022] like Figures 1-4 As shown, a multi-stage lithium iron phosphate particle screening device provided in this embodiment includes a screening box 1, three groups of screens 6 are arranged in sequence along the vertical direction in the screening box 1, a transmission cleaning assembly 5 is arranged above the screen 6, and the transmission cleaning assembly 5 is composed of a screw 502, a guide rod 503, a movable plate 504, a scraper plate 505, a roller 506, a transmission box 501, a driving motor 507, a driving wheel 508, a belt 509 and a driven wheel 510. The outer wall of the screening box 1 is located at both ends of the screen 6 and a discharge baffle 2 is installed, and a guide plate 3 is fixed at an inclined position at the bottom end of the screening box 1.

[0023] A filling hopper 7 is welded at the middle of the upper end of the screening box 1, and a vibrator 4 is installed on the back wall of the screening box 1 by bolts. The lithium iron phosphate particles are injected into the screening box 1 through the filling hopper 7 for screening, and the vibrator 4 can accelerate its screening rate.

[0024] The screens 6 are fixed in the screening box 1 by screws. The screening capacities of the three groups of screens 6 increase in sequence. The three groups of screens 6 can perform multi-stage screening on the lithium iron phosphate particles.

[0025] The screw 502 is rotatably installed between the inner walls of the screening box 1, the guide rod 503 is welded between the inner walls of the screening box 1, the movable plate 504 is connected to the screw 502 by threads, and the guide rod 503 passes through the movable plate 504. During the rotation of the screw 502, the movable plate 504 can move under the action of the threads and the guide rod 503.

[0026] The scraper plate 505 is welded to the bottom end of the movable plate 504, and the roller 506 is rotatably installed inside the bottom end of the scraper plate 505. The movable plate 504 drives the scraper plate 505 to move back and forth in the screening box 1. During the reciprocating movement, the roller 506 can exert pressure on the lithium iron phosphate particles mixed in the sieve holes and push them out of the sieve holes, thereby avoiding clogging of the screen 6.

[0027] The transmission box 501 is fixed to a side wall of the screening box 1 by bolts. The output shaft of the driving motor 507 is fixedly connected to the driving wheel 508. The driving wheel 508 and the driven wheel 510, as well as between the driven wheels 510, are connected by belts 509. The driving wheel 508 and the driven wheel 510 are respectively fixedly connected to one end of the screw rod 502. The driving motor 507 drives the driving wheel 508 to rotate. The driving wheel 508 drives the driven wheel 510 to rotate actively through the belt 509. The driving wheel 508 and the driven wheel 510 then drive the screw rod 502 to rotate respectively.

[0028] The discharge baffle 2 is fixed to the side wall of the screening box 1 by screws. The guide plate 3 is welded to the inner bottom end of the screening box 1. The qualified lithium iron phosphate particles after screening are discharged and collected through the guide plate 3. By removing the discharge baffle 2, the lithium iron phosphate particles on the screen 6 can be discharged and collected under the action of the scraping plate 505.

[0029] The working principle of this device: Connect the external power supply. The lithium iron phosphate particles to be screened are injected into the screening box 1 through the feeding hopper 7. At this time, the three groups of screens 6 can perform multi-stage screening on them. The vibrator 4 can accelerate the screening rate. The qualified lithium iron phosphate particles after screening are discharged and collected through the guide plate 3. During the screening process, the driving motor 507 drives the driving wheel 508 to rotate. The driving wheel 508 drives the driven wheel 510 to rotate through the belt 509. The two then drive the screw rod 502 to rotate respectively, so that the moving plate 504 drives the scraping plate 505 to reciprocate in the screening box 1 under the action of the thread and the guide rod 503. During the reciprocating movement, the roller 506 can apply pressure to the lithium iron phosphate particles caught in the sieve holes and push them out of the sieve holes, thus avoiding the blockage of the screen 6 and ensuring the screening efficiency of the device. When the screening is completed, by removing the discharge baffle 2, the lithium iron phosphate particles on the screen 6 can be discharged and collected under the action of the scraping plate 505.

[0030] The above is only a further embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the scope disclosed by the present utility model, according to the technical solution and concept of the present utility model, makes equivalent substitutions or changes, all belong to the protection scope of the present utility model.

Claims

1. A multi-stage lithium iron phosphate particle screening device, characterized in that: The invention comprises a screening box (1), wherein three groups of screens (6) are arranged in sequence in the vertical direction in the screening box (1), a transmission cleaning assembly (5) is arranged above the screens (6), and the transmission cleaning assembly (5) is composed of a screw (502), a guide rod (503), a movable plate (504), a scraper plate (505), a roller (506), a transmission box (501), a driving motor (507), a driving wheel (508), a belt (509) and a driven wheel (510), and unloading baffles (2) are installed at both ends of the outer wall of the screening box (1) located at the screens (6), and a guide plate (3) is fixed at an inclined position at the bottom end of the screening box (1).

2. A multi-stage lithium iron phosphate particle screening device according to claim 1, characterized in that: A material injection hopper (7) is welded to the middle of the upper end of the screening box (1), and a vibrator (4) is mounted on the back wall of the screening box (1) via bolts.

3. A multi-stage lithium iron phosphate particle screening device according to claim 2, characterized in that: The screen (6) is fixed in the screening box (1) by means of screws, and the screening capacities of the three groups of screens (6) increase sequentially.

4. A multi-stage lithium iron phosphate particle screening device according to claim 3, characterized in that: The screw rod (502) is rotatably mounted between the inner walls of the screening box (1), the guide rod (503) is welded between the inner walls of the screening box (1), the movable plate (504) is connected to the screw rod (502) via threads, and the guide rod (503) passes through the movable plate (504).

5. A multi-stage lithium iron phosphate particle screening device according to claim 4, characterized in that: The scraping plate (505) is welded to the bottom end of the moving plate (504), and the roller (506) is rotatably mounted inside the bottom end of the scraping plate (505).

6. A multi-stage lithium iron phosphate particle screening device according to claim 5, characterized in that: The transmission box (501) is fixed to a side wall of the screening box (1) by means of bolts; the output shaft of the driving motor (507) is fixedly connected to the driving wheel (508); the driving wheel (508) and the driven wheel (510) are connected to each other by means of the belt (509); and the driving wheel (508) and the driven wheel (510) are respectively fixedly connected to one end of the screw rod (502).

7. A multi-stage lithium iron phosphate particle screening device according to claim 6, characterized in that: The unloading baffle (2) is fixed to the side wall of the screening box (1) by means of screws, and the guide plate (3) is welded to the bottom end of the screening box (1).

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