Lithium iron phosphate positive electrode material grading and screening equipment and use method

By using a combination cleaning mechanism and strike mechanism of longitudinal ventilation groove and transverse ventilation groove in the lithium iron phosphate positive electrode material grading screening equipment, the problem of high-pressure recoil blowing and flying fine-grained materials is solved, and the timely cleaning of the mesh is achieved and The effective collection of materials improves the screening speed and the efficiency of equipment use.

CN118663548BActive Publication Date: 2024-12-17SICHUAN FULIN NEW ENERGY TECH CO LTD
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Patent Information

Application Number
CN202411151667.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-08-21
Publication Date
2024-12-17
Estimated Expiration
2044-08-21

AI Technical Summary

Technical Problem

In the prior art, it is difficult to collect fine-grained materials when the high-pressure recoil air flow recoils on the inner screen plate, resulting in clogging of the mesh holes during the screening process and affecting the screening speed.

Method used

A grading screening equipment for lithium iron phosphate positive electrode material is designed, and a cleaning mechanism combining a longitudinal ventilation groove and a transverse ventilation groove are used to blow into the longitudinal ventilation groove through high-pressure air, blow the blockage into the transverse ventilation groove, and collect it through the air flow. The aggregate silo, the cleaning mechanism rotates and cleans the U-shaped filter, and accelerates the screening with the vibration of the knocking mechanism.

Benefits of technology

Timely cleaning of blocked mesh holes is achieved, screening speed is improved, and the blown material is used for collection, reducing noise and component wear.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention relates to the technical field of screening equipment, specifically to a grading screening equipment for lithium iron phosphate positive electrode materials and a method of using the equipment, comprising an outer shell, the outer shell comprising a shell, a feeding port being provided at the top of the shell, a grading screening mechanism being provided in the shell, a collecting trough corresponding to the position of the grading screening mechanism being fixedly connected to the inner bottom surface of the shell, a collection bin being provided at the ends of the collecting trough and the grading screening mechanism, a cleaning mechanism 1 and a cleaning mechanism 2 being provided on the grading screening mechanism, the cleaning mechanism 1 and the cleaning mechanism 2 being connected to a driving mechanism. Through the longitudinal ventilation grooves provided, the lithium iron phosphate positive electrode materials blocked on the U-shaped filter can be blown into the transverse ventilation grooves to complete the cleaning of the U-shaped filter, and then the lithium iron phosphate positive electrode materials in the transverse ventilation grooves will be blown out from the gas outlet block by the transverse airflow, and enter the collection bin through a pipeline to complete the collection, so that these lithium iron phosphate positive electrode materials can also be utilized.
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Description

Technical Field

[0001] The present invention relates to the technical field of screening equipment, and in particular to lithium iron phosphate positive electrode material grading and screening equipment and a use method thereof. Background Art

[0002] Lithium iron phosphate battery is a lithium-ion battery that uses lithium iron phosphate as the positive electrode material and carbon as the negative electrode material. Lithium iron phosphate battery has the advantages of good safety, long life, large capacity, good performance at high temperature, light weight, no memory effect, and less environmental pollution. In addition, the manufacturing process of lithium iron phosphate battery is quite mature, so lithium iron phosphate battery has become the best option in the selection of power batteries. Lithium iron phosphate positive electrode materials need to be screened when used to exclude lithium iron phosphate microspheres of unqualified size, so as to ensure production accuracy and quality stability.

[0003] The existing patent (publication number: CN114769109A) discloses a fine-grained material grading and screening equipment. When the present invention is used, a first layer of inner screen plates and a second layer of inner screen plates are fixedly arranged inside the fine-grained material grading screen drum assembly. A primary screening structure is formed inside the first layer of inner screen plates, and a secondary screening structure is formed between the first layer of inner screen plates and the second layer of inner screen plates. The state of the fine-grained material in the first layer of inner screen plates can be broken up by the rotation of the stirring rotating shaft rod and the stirring rotating support rod. The reciprocating rotation of the screen anti-clogging high-pressure recoil assembly in the middle part of the fine-grained material grading screen drum assembly is realized through the reciprocating rotation of four industrial guide wheels. The rotation path is a quarter of the annular path. At this time, the high-pressure gas sprayed from the high-pressure recoil air nozzles on the first high-pressure recoil air pipe and the second high-pressure recoil air pipe recoils the first layer of inner screen plates and the second layer of inner screen plates, thereby realizing the recoil clearing of the fine-mesh clogged filter. In the process of realizing the present invention, the inventors found that the prior art had the following problems: 1. When the high-pressure airflow ejected by the high-pressure recoil air nozzle recoils the inner screen plate, the fine-grained materials stuck on the inner screen plate will be blown away, making it difficult to collect and utilize; 2. Because the high-pressure airflow will blow away the fine-grained materials on the inner screen plate, the inner screen plate cannot be recoiled and cleaned during the screening process, which causes the blocked mesh holes to exist for a long time during the screening process, affecting the screening speed. Summary of the invention

[0004] The purpose of the present invention is to provide a lithium iron phosphate positive electrode material grading and screening device and a method of use, so as to solve the problems mentioned in the above background technology that the fine particles blown away by recoil are difficult to collect and utilize, and the blocked mesh holes in the screening process will exist for a long time, affecting the screening speed. To achieve the above purpose, the present invention provides the following technical solutions:

[0005] The grading and screening equipment for lithium iron phosphate positive electrode materials comprises an outer shell, wherein the outer shell comprises a shell, a feeding port is provided on the top of the shell, a grading and screening mechanism is provided inside the shell, a collecting trough corresponding to the position of the grading and screening mechanism is fixedly connected to the inner bottom surface of the shell, a collecting bin is provided at the end of the collecting trough and the grading and screening mechanism, a cleaning mechanism 1 and a cleaning mechanism 2 are provided on the grading and screening mechanism, the cleaning mechanism 1 and the cleaning mechanism 2 are connected to a driving mechanism, and a knocking mechanism is also provided on the grading and screening mechanism.

[0006] Preferably, the grading screening mechanism comprises a first U-shaped filter screen and a second U-shaped filter screen which are positioned correspondingly, the first U-shaped filter screen is provided with a cleaning mechanism 1, the second U-shaped filter screen is provided with a cleaning mechanism 2, both sides of the first U-shaped filter screen and the second U-shaped filter screen are fixedly connected with a mounting bracket 1, the mounting bracket 1 is provided with a knocking mechanism, and the mounting bracket 1 is fixedly connected to the housing;

[0007] The two ends of the first U-shaped filter screen are respectively provided with a closed baffle plate 1 and a discharge baffle plate 1, the discharge baffle plate 1 is close to the collection bin, the closed baffle plate 1 and the discharge baffle plate 1 are fixedly connected to a connecting shaft 1, one end of the connecting shaft 1 is rotatably connected to the shell, and the other end of the connecting shaft 1 is rotatably connected to a mounting bracket 2;

[0008] The two ends of the second U-shaped filter are respectively provided with a closed baffle plate 2 and a discharge baffle plate 2, the discharge baffle plate 2 is close to the aggregate bin, the closed baffle plate 2 and the discharge baffle plate 2 are fixedly connected to a connecting shaft 2, one end of the connecting shaft 2 is rotatably connected to the shell, and the other end of the connecting shaft 2 is rotatably connected to a mounting bracket 2.

[0009] Preferably, the discharging baffle plate 1 comprises a baffle plate body 1, a discharging port 1 is formed on the baffle plate body 1, a sealing plate 1 is provided at one of the discharging ports, the sealing plate 1 is fixedly connected to a sliding rod 1, the sliding rod 1 is slidably connected to two symmetrically arranged L-shaped slide grooves 1, the L-shaped slide grooves 1 are fixedly connected to the baffle plate body 1, the sliding rod 1 is rotatably connected to one end of two symmetrically arranged connecting rods 1, the other ends of the two connecting rods 1 are rotatably connected to the movable ends of two electric telescopic rods 1, and the electric telescopic rods 1 are fixedly connected to the baffle plate body 1;

[0010] The second discharging baffle includes a second baffle body, a second discharging port is formed on the second baffle body, a second sealing plate is provided at the second discharging port, the second sealing plate is fixedly connected to a second sliding rod, the second sliding rod is slidably connected in two symmetrically arranged L-shaped slide grooves, the second L-shaped slide grooves are fixedly connected to the second baffle body, the second sliding rod is rotatably connected to one end of two symmetrically arranged connecting rods, the other ends of the two connecting rods are respectively rotatably connected to the movable ends of two electric telescopic rods, and the two electric telescopic rods are fixedly connected to the second baffle body.

[0011] Preferably, the cleaning mechanism 1 comprises a transverse ventilation groove 1 and a longitudinal ventilation groove 1 which are corresponding in position, the transverse ventilation groove 1 is in contact with the inner surface of the first U-shaped filter screen, the transverse ventilation groove 1 is fixedly connected to a closed baffle plate 1 and a discharge baffle plate 1, the longitudinal ventilation groove 1 is in contact with the outer surface of the first U-shaped filter screen, and the two ends of the transverse ventilation groove 1 and the longitudinal ventilation groove 1 are respectively fixedly connected with an air inlet block 1 and an air outlet block 1, and the air outlet block 1 is close to the aggregate bin;

[0012] The second cleaning mechanism includes a second transverse ventilation groove and a second longitudinal ventilation groove which are positioned correspondingly. The second transverse ventilation groove is in contact with the inner surface of the second U-shaped filter screen. The second transverse ventilation groove is fixedly connected to a second closed baffle and a second discharge baffle. The second longitudinal ventilation groove is in contact with the outer surface of the second U-shaped filter screen. The two ends of the second transverse ventilation groove and the second longitudinal ventilation groove are respectively fixedly connected with an air inlet block and an air outlet block. The air outlet block is close to the aggregate bin.

[0013] Preferably, the driving mechanism includes a driving motor, which is fixedly connected to the shell and connected to connecting shaft 1. The driving mechanism also includes a gear ring, and both ends of the longitudinal ventilation groove 1 and both ends of the longitudinal ventilation groove 2 are fixedly connected with gear rings, and the two gear rings at corresponding positions are meshed.

[0014] Preferably, the knocking mechanism includes a rotating shaft 1, which is rotatably connected to a mounting bracket 1, and both ends of the rotating shaft 1 are rotatably connected to a rotating shaft 2, which is also rotatably connected to the mounting bracket 1, and the two rotating shafts 2 are fixedly connected to spur gears, which mesh with gear rings at corresponding positions, and transmission components are provided between the two rotating shafts 2 and the rotating shaft 1, and a number of knocking components are evenly provided on the rotating shaft 1.

[0015] Preferably, the transmission assembly includes bevel gear 1 and bevel gear 2, bevel gear 1 is fixedly connected to rotating shaft 2, bevel gear 2 is rotatably connected to rotating shaft 1, bevel gear 1 and bevel gear 2 are both meshed with bevel gear 3, bevel gear 3 is rotatably connected to mounting bracket 1, ratchet 1 and ratchet 2 are also fixedly connected to rotating shaft 1, elastic clamping block 1 is provided on bevel gear 1, and elastic clamping block 1 is clamped with ratchet 1, and elastic clamping block 2 is provided on bevel gear 2, and elastic clamping block 2 is clamped with ratchet 2.

[0016] Preferably, the knocking assembly includes an incomplete gear and a rack, the incomplete gear is fixedly connected to the rotating shaft one, the rack is fixedly connected to the knocking slider, the knocking slider is slidably connected to the mounting bracket three, the mounting bracket three is fixedly connected to the mounting bracket one, a compression spring is provided between the knocking slider and the mounting bracket three, and the incomplete gear engages with the rack during rotation.

[0017] The method for using the lithium iron phosphate positive electrode material grading and screening equipment comprises the following steps:

[0018] First, the lithium iron phosphate positive electrode material to be screened is added to the first U-shaped filter screen from the feeding port, and then the high-pressure air is passed into the transverse ventilation groove 1 and the longitudinal ventilation groove 1 through the air intake block 1, and then passed into the transverse ventilation groove 2 and the longitudinal ventilation groove 2 through the air intake block 2, and then the driving motor is started and controlled to reciprocate;

[0019] The driving motor drives the connecting shaft 1 connected thereto to rotate, and the connecting shaft 1 drives the closed baffle 1 and the discharging baffle 1 connected thereto to rotate, and the closed baffle 1 and the discharging baffle 1 drive the transverse ventilation groove 1 and the longitudinal ventilation groove 1 connected thereto to rotate, and the high-pressure air in the longitudinal ventilation groove 1 is blown upward, and the lithium iron phosphate positive electrode material blocked on the first U-shaped filter screen is blown into the transverse ventilation groove 1, so as to clean the filter holes blocked on the first U-shaped filter screen, and then the transverse airflow of the transverse ventilation groove 1 will carry the lithium iron phosphate positive electrode material out from the gas outlet block 1, and send it to the corresponding area in the collecting bin through the pipeline to complete the collection;

[0020] The rotation of the gear ring on the longitudinal ventilation groove 1 drives the gear ring on the longitudinal ventilation groove 2 to rotate, so that the cleaning mechanism 2 on the second U-shaped filter also rotates back and forth, thereby cleaning the blocked filter holes on the second U-shaped filter and collecting the positive electrode material;

[0021] When the gear ring rotates, all the spur gears meshing with the gear ring will rotate, the gear drives the rotating shaft 2 connected thereto to rotate, the rotating shaft 2 drives the bevel gear 1 connected thereto to rotate, when the bevel gear 1 rotates forward, the elastic clamp 1 on the bevel gear 1 can drive the ratchet 1, so that the rotating shaft 1 rotates forward, when the bevel gear 1 rotates reversely, the elastic clamp 1 on the bevel gear 1 cannot drive the ratchet 1, and the bevel gear 2 driven by the bevel gear 3 and the bevel gear 1 rotates forward, the elastic clamp 2 on the bevel gear 2 can drive the ratchet 2, so that the rotating shaft 1 rotates forward;

[0022] The rotation of the rotating shaft 1 drives the incomplete gear connected to it to rotate. When the incomplete gear rotates, it meshes with the rack, drives the knocking slider connected to the rack to move and compress the compression spring. When the incomplete gear rotates a certain angle, it will be out of mesh with the rack. At this time, the compression spring pushes the knocking slider to rebound quickly, so that the knocking slider knocks on the mounting bracket 1, vibrates the first U-shaped filter screen and the second U-shaped filter screen, and speeds up the screening speed;

[0023] The lithium iron phosphate positive electrode material screened by the first U-shaped filter falls onto the second U-shaped filter, and the lithium iron phosphate positive electrode material screened by the second U-shaped filter falls into the collecting trough. When the screening is completed, the sealing plate 1 and the sealing plate 2 are at the lowest end and then the driving motor is turned off, the electric telescopic rod 1 is started and retracted, and the electric telescopic rod 1 pulls the sliding rod 1 through the connecting rod 1, so that the sliding rod 1 slides along the L-shaped slide groove 1, drives the sealing plate 1 to move away, and opens the discharge port 1. The electric telescopic rod also performs the same action to open the discharge port 2. At this time, the equipment is tilted as a whole through the external lifting mechanism, and the lithium iron phosphate positive electrode materials in the first U-shaped filter, the second U-shaped filter and the collecting trough are poured into different areas in the collecting bin to complete the collection.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. In the present invention, by providing the longitudinal ventilation grooves, the lithium iron phosphate positive electrode materials blocked on the U-shaped filter can be blown into the transverse ventilation grooves to complete the cleaning of the U-shaped filter. Then, the lithium iron phosphate positive electrode materials in the transverse ventilation grooves will be blown out from the gas outlet block by the transverse airflow and enter the collection bin through the pipeline to complete the collection, so that these lithium iron phosphate positive electrode materials can also be utilized.

[0026] 2. In the present invention, the U-shaped filter is cleaned by rotating the cleaning mechanism. Since the cleaning mechanism will not blow away the lithium iron phosphate positive electrode material in the screening during cleaning, the cleaning of the cleaning mechanism can be carried out continuously, ensuring that the blocked mesh holes on the U-shaped filter can be cleaned in time, thereby improving the screening speed.

[0027] 3. In the present invention, by setting up a knocking mechanism, the installation bracket can be knocked when the cleaning mechanism rotates to vibrate the U-shaped filter screen, thereby accelerating the screening speed of the lithium iron phosphate positive electrode material. Compared with the screening equipment in the prior art in which the main body vibrates, the noise generated during use is smaller and the wear rate of the parts is also reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0030] Figure 3 It is a schematic diagram of the structure of the housing in the present invention;

[0031] Figure 4 It is a structural schematic diagram of the grading and screening mechanism in the present invention;

[0032] Figure 5 It is a schematic diagram of the structure of the first discharge baffle and the second discharge baffle in the present invention;

[0033] Figure 6 It is a schematic diagram of the connection mechanism between the cleaning mechanism 1 and the cleaning mechanism 2 in the present invention;

[0034] Figure 7 It is a schematic diagram of the structure of the cleaning mechanism 1 and the cleaning mechanism 2 in the present invention;

[0035] Figure 8 It is a structural schematic diagram of the knocking mechanism in the present invention.

[0036] In the figure: 1, shell; 101, shell; 102, feeding port; 103, collecting tank; 104, collecting bin; 2, grading screening mechanism; 201, first U-shaped filter; 202, second U-shaped filter; 203, mounting bracket 1; 204, closing baffle 1; 205, discharging baffle 1; 2051, baffle body 1; 2052, discharging port 1; 2053, sealing plate 1; 2054, sliding rod 1; 2 055, L-shaped chute 1; 2056, connecting rod 1; 2057, electric telescopic rod 1; 206, connecting shaft 1; 207, mounting bracket 2; 208, closing baffle 2; 209, discharging baffle 2; 2091, baffle body 2; 2092, discharging port 2; 2093, sealing plate 2; 2094, sliding rod 2; 2095, L-shaped chute 2; 2096, connecting rod 2; 2097, electric telescopic rod 2; 210, connecting shaft 2; 3, cleaning mechanism 1; 301, transverse ventilation groove 1; 302, longitudinal ventilation groove 1; 303, air inlet block 1; 304, air outlet block 1; 4, cleaning mechanism 2; 401, transverse ventilation groove 2; 402, longitudinal ventilation groove 2; 403, air inlet block 2; 404, air outlet block 2; 5, driving mechanism; 501, driving motor; 502, gear ring; 6, knocking mechanism; 601, rotation Axis one; 602, rotating shaft two; 603, spur gear; 61, transmission assembly; 611, bevel gear one; 612, bevel gear two; 613, bevel gear three; 614, ratchet one; 615, ratchet two; 616, elastic block one; 617, elastic block two; 62, knocking assembly; 621, incomplete gear; 622, rack; 623, knocking slider; 624, mounting bracket three; 625, compression spring. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the present invention.

[0038] See also Figures 1 to 8 , the present invention provides a technical solution:

[0039] The grading and screening equipment for lithium iron phosphate positive electrode materials comprises an outer shell 1, wherein the outer shell 1 comprises a shell 101, a feeding port 102 is provided on the top of the shell 101, a grading and screening mechanism 2 is provided inside the shell 101, a collecting trough 103 corresponding to the position of the grading and screening mechanism 2 is fixedly connected to the inner bottom surface of the shell 101, a collecting bin 104 is provided at the end of the collecting trough 103 and the grading and screening mechanism 2, a cleaning mechanism 1 3 and a cleaning mechanism 2 4 are provided on the grading and screening mechanism 2, the cleaning mechanism 1 3 and the cleaning mechanism 2 4 are connected to a driving mechanism 5, and a knocking mechanism 6 is also provided on the grading and screening mechanism 2.

[0040] In this embodiment, the collection bin 104 is divided into three areas, which are respectively used to collect lithium iron phosphate positive electrode materials of different sizes in the first U-shaped filter 201, the second U-shaped filter 202 and the collecting trough 103. Two guide plates of different heights are provided on the collection bin 104, corresponding to the first U-shaped filter 201 and the second U-shaped filter 202, respectively, so that the lithium iron phosphate positive electrode materials poured out from the first U-shaped filter 201 and the second U-shaped filter 202 can smoothly enter the corresponding areas in the collection bin 104.

[0041] In this embodiment, the grading and screening mechanism 2 includes a first U-shaped filter 201 and a second U-shaped filter 202 which are positioned correspondingly, a cleaning mechanism 1 3 is provided on the first U-shaped filter 201, and a cleaning mechanism 2 4 is provided on the second U-shaped filter 202. Both sides of the first U-shaped filter 201 and the second U-shaped filter 202 are fixedly connected with a mounting bracket 1 203, and a knocking mechanism 6 is provided on the mounting bracket 1 203. The mounting bracket 1 203 is fixedly connected to the housing 101.

[0042] The two ends of the first U-shaped filter screen 201 are respectively provided with a closed baffle 204 and a discharge baffle 205, the discharge baffle 205 is close to the collecting bin 104, the closed baffle 204 and the discharge baffle 205 are fixedly connected to a connecting shaft 206, one end of the connecting shaft 206 is rotatably connected to the housing 101, and the other end of the connecting shaft 206 is rotatably connected to a mounting bracket 207;

[0043] The two ends of the second U-shaped filter 202 are respectively provided with a closed baffle 208 and a discharge baffle 209, and the discharge baffle 209 is close to the collecting bin 104. The closed baffle 208 and the discharge baffle 209 are fixedly connected to a connecting shaft 210, one end of the connecting shaft 210 is rotatably connected to the shell 101, and the other end of the connecting shaft 210 is rotatably connected to the mounting bracket 207.

[0044] In this embodiment, the discharging baffle 205 includes a baffle body 2051, a discharging port 2052 is formed on the baffle body 2051, a sealing plate 2053 is provided at the discharging port 2052, the sealing plate 2053 is fixedly connected to a sliding rod 2054, the sliding rod 2054 is slidably connected to two symmetrically arranged L-shaped chute 2055, the L-shaped chute 2055 is fixedly connected to the baffle body 2051, the sliding rod 2054 is rotatably connected to one end of two symmetrically arranged connecting rods 2056, the other ends of the two connecting rods 2056 are rotatably connected to the movable ends of two electric telescopic rods 2057, and the electric telescopic rod 2057 is fixedly connected to the baffle body 2051;

[0045] The discharging baffle 209 includes a baffle body 2091, a discharging port 2092 is formed on the baffle body 2091, a sealing plate 2093 is provided at the discharging port 2092, the sealing plate 2093 is fixedly connected to a sliding rod 2094, the sliding rod 2094 is slidably connected in two symmetrically arranged L-shaped slide grooves 2095, the L-shaped slide grooves 2095 are fixedly connected to the baffle body 2091, the sliding rod 2094 is rotatably connected to one end of two symmetrically arranged connecting rods 2096, the other ends of the two connecting rods 2096 are rotatably connected to the movable ends of two electric telescopic rods 2097 respectively, and the electric telescopic rods 2097 are fixedly connected to the baffle body 2091.

[0046] In this embodiment, the cleaning mechanism 3 includes a transverse ventilation groove 301 and a longitudinal ventilation groove 302 corresponding to each other in position, the transverse ventilation groove 301 is in contact with the inner surface of the first U-shaped filter 201, the transverse ventilation groove 301 is fixedly connected to the closed baffle 204 and the discharge baffle 205, the longitudinal ventilation groove 302 is in contact with the outer surface of the first U-shaped filter 201, and the two ends of the transverse ventilation groove 301 and the longitudinal ventilation groove 302 are respectively fixedly connected with an air inlet block 303 and an air outlet block 304, and the air outlet block 304 is close to the aggregate bin 104;

[0047] The cleaning mechanism 24 includes a transverse ventilation groove 201 and a longitudinal ventilation groove 202 which are positioned correspondingly. The transverse ventilation groove 201 is in contact with the inner surface of the second U-shaped filter 202. The transverse ventilation groove 201 is fixedly connected to the closed baffle 208 and the discharge baffle 209. The longitudinal ventilation groove 202 is in contact with the outer surface of the second U-shaped filter 202. The two ends of the transverse ventilation groove 201 and the longitudinal ventilation groove 202 are respectively fixedly connected with an air inlet block 203 and an air outlet block 204. The air outlet block 204 is close to the aggregate bin 104.

[0048] In this embodiment, a hose is connected to each of the gas outlet block 1 304 and the gas outlet block 2 404, and the ends of the hose are respectively located in corresponding areas in the collecting bin 104, so that the lithium iron phosphate positive electrode materials blown out from the gas outlet block 1 304 and the gas outlet block 2 404 can enter the collecting bin 104 through the hose, and these lithium iron phosphate positive electrode materials can be reused after being collected.

[0049] In this embodiment, the driving mechanism 5 includes a driving motor 501, which is fixedly connected to the shell 101. The driving motor 501 is connected to the connecting shaft 206. The driving mechanism 5 also includes a gear ring 502. Both ends of the longitudinal ventilation groove 1 302 and both ends of the longitudinal ventilation groove 2 402 are fixedly connected with the gear ring 502, and the two gear rings 502 at corresponding positions are meshed.

[0050] In this embodiment, the knocking mechanism 6 includes a rotating shaft 601, and the rotating shaft 601 is rotatably connected to the mounting bracket 203. Both ends of the rotating shaft 601 are rotatably connected to the rotating shaft 2 602, and the rotating shaft 2 602 is also rotatably connected to the mounting bracket 203. The two rotating shafts 2 602 are fixedly connected with spur gears 603, and the spur gears 603 are meshed with the gear rings 502 at corresponding positions. A transmission component 61 is provided between the two rotating shafts 2 602 and the rotating shaft 1 601. The transmission component 61 ensures that no matter what the rotation direction of the rotating shaft 2 602 is, the rotating shaft 1 601 always rotates in one direction. A plurality of knocking components 62 are evenly provided on the rotating shaft 1 601.

[0051] In this embodiment, the transmission assembly 61 includes a bevel gear 1 611 and a bevel gear 2 612, the bevel gear 1 611 is fixedly connected to the rotating shaft 2 602, the bevel gear 2 612 is rotatably connected to the rotating shaft 1 601, the bevel gear 1 611 and the bevel gear 2 612 are both meshed with the bevel gear 3 613, the bevel gear 3 613 is rotatably connected to the mounting bracket 1 203, and the rotating shaft 1 601 is also fixedly connected with a ratchet 1 614 and a ratchet 2 615, the bevel gear 1 611 is provided with an elastic block 1 616, and the elastic block 1 616 is engaged with the ratchet 1 614, the bevel gear 2 612 is provided with an elastic block 2 617, and the elastic block 2 617 is engaged with the ratchet 2 615.

[0052] In this embodiment, the knocking assembly 62 includes an incomplete gear 621 and a rack 622, the incomplete gear 621 is fixedly connected to the rotating shaft 601, the rack 622 is fixedly connected to the knocking slider 623, the knocking slider 623 is slidably connected to the mounting bracket three 624, the mounting bracket three 624 is fixedly connected to the mounting bracket one 203, a compression spring 625 is provided between the knocking slider 623 and the mounting bracket three 624, and the incomplete gear 621 engages with the rack 622 during rotation.

[0053] In this embodiment, the housing 1 is mounted on an external lifting device, which can tilt the housing 1 toward the position of the collecting bin 104 to collect the screened lithium iron phosphate positive electrode material.

[0054] The method for using the lithium iron phosphate positive electrode material grading and screening equipment comprises the following steps:

[0055] First, the lithium iron phosphate positive electrode material to be screened is added to the first U-shaped filter screen 201 from the feeding port 102, and then the high-pressure air is passed into the transverse ventilation groove 1 301 and the longitudinal ventilation groove 1 302 through the air intake block 1 303, and then passed into the transverse ventilation groove 2 401 and the longitudinal ventilation groove 2 402 through the air intake block 2 403, and then the drive motor 501 is started and controlled to reciprocate;

[0056] The driving motor 501 drives the connecting shaft 206 connected thereto to rotate, and the connecting shaft 206 drives the closed baffle 204 and the discharging baffle 205 connected thereto to rotate, and the closed baffle 204 and the discharging baffle 205 drive the horizontal ventilation groove 301 and the longitudinal ventilation groove 302 connected thereto to rotate, and the high-pressure air in the longitudinal ventilation groove 302 is blown upward, and the lithium iron phosphate positive electrode material blocked on the first U-shaped filter 201 is blown into the horizontal ventilation groove 301, so as to clean the blocked filter holes on the first U-shaped filter 201, and then the horizontal airflow of the horizontal ventilation groove 301 will carry the lithium iron phosphate positive electrode material out from the gas outlet block 304, and send it to the corresponding area in the collecting bin 104 through the pipeline to complete the collection;

[0057] The gear ring 502 on the longitudinal ventilation groove 1 302 rotates to drive the gear ring 502 on the longitudinal ventilation groove 2 402 to rotate, so that the cleaning mechanism 2 4 on the second U-shaped filter 202 also rotates back and forth, thereby cleaning the blocked filter holes on the second U-shaped filter 202 and collecting the positive electrode material;

[0058] When the gear ring 502 rotates, all the spur gears 603 meshing with the gear ring 502 will rotate, and the gears drive the rotating shaft 2 602 connected thereto to rotate, and the rotating shaft 2 602 drives the bevel gear 1 611 connected thereto to rotate. When the bevel gear 1 611 rotates forward, the elastic block 1 616 on the bevel gear 1 611 can drive the ratchet 1 614, thereby causing the rotating shaft 1 601 to rotate forward. When the bevel gear 1 611 rotates reversely, the elastic block 1 616 on the bevel gear 1 611 cannot drive the ratchet 1 614, and the bevel gear 2 612 driven by the bevel gear 3 613 and the bevel gear 1 611 rotates forward, and the elastic block 2 617 on the bevel gear 2 612 can drive the ratchet 2 615, thereby causing the rotating shaft 1 601 to rotate forward.

[0059] The rotation of the rotating shaft 1 601 drives the incomplete gear 621 connected thereto to rotate. When the incomplete gear 621 rotates, it meshes with the rack 622, driving the knocking slider 623 connected to the rack 622 to move and compress the compression spring 625. When the incomplete gear 621 rotates a certain angle, it will be disengaged from the rack 622. At this time, the compression spring 625 pushes the knocking slider 623 to rebound quickly, so that the knocking slider 623 knocks on the mounting bracket 1 203, vibrating the first U-shaped filter 201 and the second U-shaped filter 202, thereby accelerating the screening speed;

[0060] The lithium iron phosphate positive electrode material screened by the first U-shaped filter 201 falls onto the second U-shaped filter 202, and the lithium iron phosphate positive electrode material screened by the second U-shaped filter 202 falls into the collecting tank 103. When the screening is completed, the sealing plate 1 2053 and the sealing plate 2093 are at the lowest end, and then the driving motor 501 is turned off, and the electric telescopic rod 1 2057 is started and retracted. The electric telescopic rod 1 2057 pulls the sliding rod 1 2054 through the connecting rod 1 2056, so that the sliding rod 1 2054 slides along the L-shaped slide groove 1 2055, driving the sealing plate 1 2053 to move away, and opening the discharge port 1 2052. The electric telescopic rod also performs the same action to open the discharge port 2092. At this time, the entire device is tilted by the external lifting mechanism, and the lithium iron phosphate positive electrode materials in the first U-shaped filter 201, the second U-shaped filter 202 and the collecting tank 103 are poured into different areas in the collecting bin 104 to complete the collection.

[0061] The above shows and describes the basic principles, main features and advantages of the present invention. Technical personnel in this industry should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A lithium iron phosphate positive electrode material grading and screening device, comprising a housing (1), characterized in that: The housing (1) comprises a shell (101), a loading port (102) is provided at the top of the shell (101), a grading and screening mechanism (2) is provided inside the shell (101), a collecting trough (103) corresponding to the position of the grading and screening mechanism (2) is fixedly connected to the inner bottom surface of the shell (101), a collecting bin (104) is provided at the end of the collecting trough (103) and the grading and screening mechanism (2), a cleaning mechanism 1 (3) and a cleaning mechanism 2 (4) are provided on the grading and screening mechanism (2), the cleaning mechanism 1 (3) and the cleaning mechanism 2 (4) are connected to a driving mechanism (5), and a knocking mechanism (6) is also provided on the grading and screening mechanism (2); The grading screening mechanism (2) comprises a first U-shaped filter (201) and a second U-shaped filter (202) which are positioned correspondingly, the first U-shaped filter (201) is provided with a cleaning mechanism one (3), the second U-shaped filter (202) is provided with a cleaning mechanism two (4), both sides of the first U-shaped filter (201) and the second U-shaped filter (202) are fixedly connected with a mounting bracket one (203), the mounting bracket one (203) is provided with a knocking mechanism (6), and the mounting bracket one (203) is fixedly connected to the housing (101); A closed baffle plate 1 (204) and a discharge baffle plate 1 (205) are respectively provided at both ends of the first U-shaped filter screen (201); the discharge baffle plate 1 (205) is close to the material collection bin (104); the closed baffle plate 1 (204) and the discharge baffle plate 1 (205) are fixedly connected to a connecting shaft 1 (206); one end of the connecting shaft 1 (206) is rotatably connected to the housing (101); and the other end of the connecting shaft 1 (206) is rotatably connected to a mounting bracket 2 (207); The two ends of the second U-shaped filter screen (202) are respectively provided with a second closed baffle plate (208) and a second discharge baffle plate (209), the second discharge baffle plate (209) is close to the collecting bin (104), the second closed baffle plate (208) and the second discharge baffle plate (209) are fixedly connected to a second connecting shaft (210), one end of the second connecting shaft (210) is rotatably connected to the housing (101), and the other end of the second connecting shaft (210) is rotatably connected to a second mounting bracket (207); The cleaning mechanism 1 (3) comprises a transverse ventilation groove 1 (301) and a longitudinal ventilation groove 1 (302) which are positioned correspondingly, the transverse ventilation groove 1 (301) is in contact with the inner surface of the first U-shaped filter screen (201), the transverse ventilation groove 1 (301) is fixedly connected to a closed baffle plate 1 (204) and a discharge baffle plate 1 (205), the longitudinal ventilation groove 1 (302) is in contact with the outer surface of the first U-shaped filter screen (201), and the two ends of the transverse ventilation groove 1 (301) and the longitudinal ventilation groove 1 (302) are respectively fixedly connected with an air inlet block 1 (303) and an air outlet block 1 (304), and the air outlet block 1 (304) is close to the aggregate bin (104); The cleaning mechanism 2 (4) comprises a second transverse ventilation groove (401) and a second longitudinal ventilation groove (402) which are in corresponding positions, the second transverse ventilation groove (401) is in contact with the inner surface of the second U-shaped filter screen (202), the second transverse ventilation groove (401) is fixedly connected to the second closing baffle plate (208) and the second discharge baffle plate (209), the second longitudinal ventilation groove (402) is in contact with the outer surface of the second U-shaped filter screen (202), the two ends of the second transverse ventilation groove (401) and the second longitudinal ventilation groove (402) are respectively fixedly connected with an air inlet block (403) and an air outlet block (404), and the air outlet block (404) is close to the aggregate bin (104); The driving mechanism (5) comprises a driving motor (501), the driving motor (501) being fixedly connected to the housing (101), the driving motor (501) being connected to the connecting shaft 1 (206), the driving mechanism (5) further comprising a gear ring (502), both ends of the longitudinal ventilation groove 1 (302) and both ends of the longitudinal ventilation groove 2 (402) being fixedly connected with the gear ring (502), and the two gear rings (502) at corresponding positions are meshed with each other.

2. The lithium iron phosphate positive electrode material grading and screening equipment according to claim 1, characterized in that: The discharging baffle plate 1 (205) comprises a baffle plate body 1 (2051), a discharging port 1 (2052) is formed on the baffle plate body 1 (2051), a sealing plate 1 (2053) is provided at the discharging port 1 (2052), the sealing plate 1 (2053) is fixedly connected to a sliding rod 1 (2054), the sliding rod 1 (2054) is slidably connected in two symmetrically arranged L-shaped sliding grooves 1 (2055), the L-shaped sliding grooves 1 (2055) are fixedly connected to the baffle plate body 1 (2051), the sliding rod 1 (2054) is rotatably connected to one end of two symmetrically arranged connecting rods 1 (2056), the other ends of the two connecting rods 1 (2056) are rotatably connected to the movable ends of two electric telescopic rods 1 (2057), and the electric telescopic rods 1 (2057) are fixedly connected to the baffle plate body 1 (2051); The discharging baffle plate 2 (209) comprises a baffle body 2 (2091), a discharging port 2 (2092) is formed on the baffle body 2 (2091), a sealing plate 2 (2093) is provided at the discharging port 2 (2092), the sealing plate 2 (2093) is fixedly connected to a sliding rod 2 (2094), the sliding rod 2 (2094) is slidably connected in two symmetrically arranged L-shaped chute 2 (2095), the L-shaped chute 2 (2095) is fixedly connected to the baffle body 2 (2091), the sliding rod 2 (2094) is rotatably connected to one end of two symmetrically arranged connecting rods 2 (2096), the other ends of the two connecting rods 2 (2096) are rotatably connected to the movable ends of two electric telescopic rods 2 (2097), and the electric telescopic rods 2 (2097) are fixedly connected to the baffle body 2 (2091).

3. The lithium iron phosphate positive electrode material grading and screening equipment according to claim 2, characterized in that: The knocking mechanism (6) comprises a rotating shaft (601), wherein the rotating shaft (601) is rotatably connected to a mounting bracket (203), and both ends of the rotating shaft (601) are rotatably connected to rotating shafts (602), and the rotating shafts (602) are also rotatably connected to the mounting bracket (203). The two rotating shafts (602) are fixedly connected to spur gears (603), and the spur gears (603) are meshed with gear rings (502) at corresponding positions. A transmission assembly (61) is provided between the two rotating shafts (602) and the rotating shaft (601), and a plurality of knocking assemblies (62) are evenly provided on the rotating shaft (601).

4. The lithium iron phosphate positive electrode material grading and screening equipment according to claim 3, characterized in that: The transmission assembly (61) comprises a bevel gear 1 (611) and a bevel gear 2 (612), wherein the bevel gear 1 (611) is fixedly connected to the rotating shaft 2 (602), and the bevel gear 2 (612) is rotatably connected to the rotating shaft 1 (601). The bevel gear 1 (611) and the bevel gear 2 (612) are both meshed with a bevel gear 3 (613), and the bevel gear 3 (613) is rotatably connected to the mounting bracket 1 (203). The rotating shaft 1 (601) is also fixedly connected with a ratchet wheel 1 (614) and a ratchet wheel 2 (615). The bevel gear 1 (611) is provided with an elastic clamping block 1 (616), and the elastic clamping block 1 (616) is clamped with the ratchet wheel 1 (614). The bevel gear 2 (612) is provided with an elastic clamping block 2 (617), and the elastic clamping block 2 (617) is clamped with the ratchet wheel 2 (615).

5. The lithium iron phosphate positive electrode material grading and screening equipment according to claim 4, characterized in that: The knocking assembly (62) comprises an incomplete gear (621) and a rack (622); the incomplete gear (621) is fixedly connected to the rotating shaft one (601); the rack (622) is fixedly connected to the knocking slider (623); the knocking slider (623) is slidably connected to the mounting bracket three (624); the mounting bracket three (624) is fixedly connected to the mounting bracket one (203); a compression spring (625) is provided between the knocking slider (623) and the mounting bracket three (624); and the incomplete gear (621) meshes with the rack (622) during rotation.

6. The method for using the lithium iron phosphate positive electrode material grading and screening equipment according to claim 5, characterized in that: The steps include: First, the lithium iron phosphate positive electrode material to be screened is added to the first U-shaped filter screen (201) from the feeding port (102), and then the high-pressure air is passed into the transverse ventilation groove (301) and the longitudinal ventilation groove (302) through the air intake block (303), and then passed into the transverse ventilation groove (401) and the longitudinal ventilation groove (402) through the air intake block (403), and then the driving motor (501) is started and the driving motor (501) is controlled to reciprocate; The driving motor (501) drives the connecting shaft 1 (206) connected thereto to rotate, and the connecting shaft 1 (206) drives the closed baffle 1 (204) and the discharge baffle 1 (205) connected thereto to rotate, and the closed baffle 1 (204) and the discharge baffle 1 (205) drive the horizontal ventilation groove 1 (301) and the longitudinal ventilation groove 1 (302) connected thereto to rotate, and the high-pressure air in the longitudinal ventilation groove 1 (302) is blown out upward, and the lithium iron phosphate positive electrode material blocked on the first U-shaped filter (201) is blown into the horizontal ventilation groove 1 (301), so as to clean the blocked filter holes on the first U-shaped filter (201), and then the horizontal airflow of the horizontal ventilation groove 1 (301) will entrain the lithium iron phosphate positive electrode material to be discharged from the gas outlet block 1 (304), and sent to the corresponding area in the collecting bin (104) through the pipeline to complete the collection; The gear ring (502) on the first longitudinal ventilation groove (302) rotates to drive the gear ring (502) on the second longitudinal ventilation groove (402) to rotate, thereby causing the second cleaning mechanism (4) on the second U-shaped filter (202) to reciprocate, thereby cleaning the blocked filter holes on the second U-shaped filter (202) and collecting the positive electrode material; When the gear ring (502) rotates, all spur gears (603) meshing with the gear ring (502) will rotate, and the gears drive the rotating shaft 2 (602) connected thereto to rotate, and the rotating shaft 2 (602) drives the bevel gear 1 (611) connected thereto to rotate. When the bevel gear 1 (611) rotates in the forward direction, the elastic block 1 (616) on the bevel gear 1 (611) can drive the ratchet 1 (614), thereby causing the rotating shaft 1 (601) to rotate in the forward direction. When the bevel gear 1 (611) rotates in the reverse direction, the elastic block 1 (616) on the bevel gear 1 (611) cannot drive the ratchet 1 (614), and the bevel gear 2 (612) driven by the bevel gear 3 (613) and the bevel gear 1 (611) rotates in the forward direction, and the elastic block 2 (617) on the bevel gear 2 (612) can drive the ratchet 2 (615), thereby causing the rotating shaft 1 (601) to rotate in the forward direction. The rotation of the rotating shaft 1 (601) drives the incomplete gear (621) connected thereto to rotate. When the incomplete gear (621) rotates, it meshes with the rack (622), driving the knocking slider (623) connected to the rack (622) to move and compress the compression spring (625). When the incomplete gear (621) rotates a certain angle, it will be disengaged from the rack (622). At this time, the compression spring (625) pushes the knocking slider (623) to rebound quickly, so that the knocking slider (623) knocks on the mounting bracket 1 (203), vibrating the first U-shaped filter (201) and the second U-shaped filter (202), thereby accelerating the screening speed; The lithium iron phosphate positive electrode material screened by the first U-shaped filter (201) falls onto the second U-shaped filter (202), and the lithium iron phosphate positive electrode material screened by the second U-shaped filter (202) falls into the collecting tank (103). When the screening is completed, the sealing plate 1 (2053) and the sealing plate 2 (2093) are at the lowest end, and then the driving motor (501) is turned off, and the electric telescopic rod 1 (2057) is started and retracted. The electric telescopic rod 1 (2057) pulls the sliding rod 1 through the connecting rod 1 (2056). (2054), so that the sliding rod 1 (2054) slides along the L-shaped sliding groove 1 (2055), driving the sealing plate 1 (2053) to move away, opening the discharge port 1 (2052), and the electric telescopic rod also performs the same action to open the discharge port 2 (2092). At this time, the device is tilted as a whole through the external lifting mechanism, and the lithium iron phosphate positive electrode material in the first U-shaped filter (201), the second U-shaped filter (202) and the collection tank (103) is poured into different areas in the collection bin (104) to complete the collection.