Airflow pulverizer for refining regenerated lithium iron phosphate coarse powder

Abstract

The application relates to the technical field of jet mills, in particular to a jet mill for fine grinding of regenerated lithium iron phosphate coarse powder, which comprises a gas-powder separation tank, one end of the gas-powder separation tank is connected with a filter, the other end is connected with a crushing tank, a breather pipe is fixedly arranged on the crushing tank, the other end of the breather pipe is connected with an air compressor, a discharging cylinder is fixedly arranged on the breather pipe, support matching rod pieces are fixedly arranged on both ends of the cylinder mouth of the discharging cylinder in a symmetrical mode, a crushing cutter is arranged in the discharging cylinder, the crushing cutter can preliminarily crush the added materials when feeding, the crushed materials pass through a filter loading plate, enter the breather pipe and enter the crushing tank along with the airflow to be crushed, under the action of the crushing cutter, larger materials can be avoided from entering the crushing tank, the phenomenon of blockage of the crushing system is well avoided, and the working efficiency of the jet mill for crushing can be further improved after preliminary crushing, and the jet mill is very practical.

Description

Technical Field

[0001] This invention relates to the field of air jet milling technology, specifically to an air jet mill for fine grinding of coarse lithium iron phosphate powder. Background Technology

[0002] The new energy vehicle industry is in a stage of rapid development, which has led to a rapid increase in the number of lithium battery recyclings. The recycling of highly environmentally friendly and energy-saving lithium materials has become an urgent need for the industry!

[0003] When recycling waste lithium batteries, it is necessary to collect and reuse the lithium iron phosphate cathode material. This involves removing black powder adhering to the aluminum sheets of lithium batteries. The black powder needs to be removed from the aluminum sheets for collection. First, the sheet material needs to be pulverized by passing it through a vibrating screen, then transferred to a hot drying drum for drying, and then put into a rotary kiln for degumming to collect the lithium iron phosphate black powder. The collected black powder needs to be further pulverized using an air jet mill to control the particle size and ensure that it meets the collection requirements. However, existing air jet mills lack a particle pretreatment mechanism and cannot perform preliminary particle pulverization. When some larger particles enter the pulverization system, it can easily cause blockages in the pulverization system, resulting in material spillage. Furthermore, the inability to perform particle pre-pulverization also makes the pulverization speed of the air jet mill slow and the working efficiency low. Summary of the Invention

[0004] The purpose of this invention is to provide an air jet mill for fine grinding of recycled lithium iron phosphate coarse powder, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An airflow pulverizer for refining coarse lithium iron phosphate powder includes an air-powder separation box. One end of the air-powder separation box is connected to a filter, and the other end is connected to a pulverizing box. An air vent pipe is fixedly installed on the pulverizing box, and the other end of the air vent pipe is connected to an air compressor. A feeding cylinder is fixedly installed on the air vent pipe. Supporting rods are symmetrically fixed at both ends of the feeding cylinder's opening. A bearing plate is fixedly installed on the end of each supporting rod away from the feeding cylinder. The bearing plate has a movable through hole. An insertion channel is provided on the lower side of the feeding cylinder, and supporting mounting side frames are symmetrically fixed on both sides of the feeding cylinder. Bearing plates are symmetrically fixed at both ends of the lower side of the supporting mounting side frames. The supporting rod has a positioning block fixedly installed at one end away from the supporting mounting side frame. The positioning block has a positioning insertion hole. A protruding arch is fixedly installed on the supporting mounting side frame. The protruding arch has a guide insertion hole, and the supporting mounting side frame above the protruding arch has symmetrical installation insertion holes. The installation insertion holes extend to the lower end of the supporting mounting side frame. The supporting mounting side frame between the installation insertion holes has symmetrical guide limiting insertion holes. A supporting mounting plate is fixedly installed on the supporting mounting side frame between the guide limiting insertion holes. An electric telescopic rod is fixedly installed on the supporting mounting plate. A material pre-crushing mechanism is installed on the feeding cylinder.

[0007] Preferably, the material pre-crushing mechanism includes a movable carrier plate, movable mating strips, a protective movable cover, a bearing movable plate, a filter plate, and a movable sealing plate. The movable carrier plate is fixedly installed on an electric telescopic rod. Downward pressure contact strips are symmetrically fixedly arranged at both ends of the movable carrier plate, and guide limiting rods are symmetrically fixedly arranged on both sides of the upper end of the movable carrier plate. The guide limiting rods are inserted into guide limiting holes, and an upward push contact plate is fixedly arranged at the upper end of the guide limiting rods. A motor is fixedly installed at the lower end of the movable carrier plate, and a rotating shaft is installed on the motor. A crushing blade is arranged on the rotating shaft.

[0008] Preferably, movable mating strips are symmetrically installed on both sides of the feeding cylinder, and a drooping connecting plate is fixedly installed on the movable mating strip. A first movable hinge rod is hinged to the lower end of the drooping connecting plate, and an installation connecting rod is also fixedly installed on the movable mating strip. The installation connecting rod is inserted into the installation mating hole.

[0009] Preferably, a connecting base block is fixedly provided at the lower end of the mounting connecting rod, the connecting base block is located at the lower end of the supporting mounting side frame, and a first connecting spring is sleeved on the mounting connecting rod, the first connecting spring is located at the lower side of the supporting mounting side frame, and second movable hinge rods are symmetrically hinged at both ends of the connecting base block.

[0010] Preferably, a protective cover is hinged to the lower end of the first movable hinge rod, and a limiting plug rod is fixedly provided on the protective cover. The limiting plug rod is inserted into the guide fitting hole, and a connecting plate is fixedly provided on the end of the limiting plug rod away from the protective cover. The connecting plate is hinged to the lower end of the first movable hinge rod.

[0011] Preferably, the upper end of the second movable hinge rod is hinged to a load-bearing movable plate, the upper end of the load-bearing movable plate is fixedly provided with a supporting mating column, the upper end of the supporting mating column is fixedly provided with a mating rectangular column, and the load-bearing movable plate is symmetrically provided with movable mating holes and insertion mounting holes, and a load-bearing mating rod is inserted into the movable mating hole.

[0012] Preferably, a mating locking plate is installed on the movable bearing strip. The mating locking plate has a mating through hole, and a supporting mating column is inserted into the mating through hole. Insertion mounting rods are symmetrically fixed on both sides of the lower end of the mating locking plate. The insertion mounting rods are inserted into the insertion mounting holes, and elastic mating pieces are symmetrically arranged on the mating locking plate between the insertion mounting rods. Positioning bearing plates are symmetrically fixed on both sides of the mating locking plate, and positioning mating rods are fixedly arranged on the positioning bearing plates.

[0013] Preferably, a filter carrier plate is installed on the movable support plate, a sealing ring plate is fixedly installed on the filter carrier plate, a support plate is fixedly installed on the sealing ring plate, a mating rectangular hole is opened on the support plate, and a mating rectangular post is inserted into the mating rectangular hole.

[0014] Preferably, movable sealing plates are symmetrically installed at both ends of the discharge cylinder. One end of the movable sealing plate is provided with a mating groove, and the other end is fixedly provided with a connecting strip. The connecting strip is provided with a sliding mating hole, and a supporting mating rod is inserted into the sliding mating hole. An upper protruding connecting frame is fixedly provided at the upper end of the connecting strip, and a third movable hinge rod is hinged on the upper protruding connecting frame.

[0015] Preferably, the upper end of the third movable hinge rod is hinged to a driving carrier plate, the upper end of the driving carrier plate is fixedly provided with a contact block, the lower end is fixedly provided with a movable plug rod, the movable plug rod is inserted into the movable mating through hole, a second connecting spring is sleeved on the movable plug rod, and a downward driving bar is fixedly provided at the lower end of the movable plug rod.

[0016] Compared with the prior art, the beneficial effects of the present invention are: the present invention has a reasonable structural design and strong functionality, and has the following advantages:

[0017] 1. A crushing blade is installed in the feeding cylinder. When feeding, the crushing blade can initially crush the added material. The crushed material passes through the filter plate and enters the air pipe. With the airflow, it enters the crushing chamber for further crushing. The crushing blade can prevent larger materials from entering the crushing chamber, which can effectively prevent the crushing system from clogging. At the same time, the initial crushing can further improve the crushing efficiency of the air jet mill, which is very practical.

[0018] 2. After adding material to the lower feed cylinder, activate the electric telescopic rod to move the movable carrier plate downwards. Simultaneously, as the crushing blades reach the working position, the movable carrier plate pushes the drive plate downwards. This, in turn, is driven by the third movable hinge rod, which moves the movable sealing plate, sealing the opening of the feed cylinder. This prevents material from splashing out during the crushing process. Furthermore, as the drive plate moves downwards, the downward-pressing drive bar pushes down the locking plate, causing the positioning locking rod to insert into the positioning locking hole, thus fixing the filter carrier plate and ensuring its stability during the crushing process.

[0019] 3. In addition, when the filter carrier plate needs to be cleaned after a period of use, the electric telescopic rod is activated to move the movable carrier plate upward, which in turn moves the movable mating strip upward. At the same time, the crushing blade will also move out of the feeding cylinder. As the movable mating strip moves upward, under the action of the first movable hinge rod, it will drive the protective movable cover to move in the opposite direction, so that it fits on the crushing blade to prevent the crushing blade from injuring the staff. At the same time, as the movable mating strip moves upward, under the action of the second movable hinge rod, it will move the filter carrier plate out of the insertion mating channel, so that the filter carrier plate can be quickly disassembled, which is very convenient. Attached Figure Description

[0020] Figure 1 This is an assembly diagram of an air jet mill.

[0021] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.

[0022] Figure 3 This is a schematic diagram of an air jet mill.

[0023] Figure 4 for Figure 3 Enlarged diagram of point B in the middle.

[0024] Figure 5 This is a schematic diagram of the movable carrier disk.

[0025] Figure 6 This is a schematic diagram of the assembly of the movable support strip and the protective cover.

[0026] Figure 7 This is an assembly diagram of the movable mating strip, the supporting movable plate strip, and the filter carrier plate.

[0027] Figure 8 A first-person view diagram of the assembly supporting the movable slats.

[0028] Figure 9 A second-view schematic diagram of the assembly supporting the movable slats.

[0029] Figure 10 This is a schematic diagram of the assembly of the movable sealing plate.

[0030] In the diagram: 1. Air-powder separation box; 11. Filter; 12. Crushing box; 13. Vent pipe; 14. Air compressor; 15. Feeding cylinder; 151. Supporting rod; 152. Bearing fixing plate; 153. Movable through hole; 16. Insertion channel; 17. Support mounting side frame; 171. Bearing rod; 172. Positioning block; 173. Positioning insertion hole; 18. Protruding arch; 181. Guide insertion hole; 19. Mounting insertion hole; 191. Guide limit insertion hole; 192. Bearing plate; 193. Electric telescopic rod; 2. Movable carrier plate; 21. Downward contact bar; 22. Guide limit rod; 23. Upward contact plate; 24. Motor; 25. Rotating shaft; 26. Crushing blade; 3. Movable bar; 31. Drooping connecting plate; 32. First movable hinge rod; 33. Mounting connecting rod 34. Connecting base block; 35. First connecting spring; 36. Second movable hinge rod; 4. Protective movable cover; 41. Limiting plug rod; 42. Connecting upright plate; 5. Bearing movable plate strip; 51. Support mating column; 52. Mating rectangular column; 53. Movable mating hole; 54. Plug-in mounting hole; 55. Mating locking plate; 56. Mating through hole; 57. Plug-in mounting rod; 58. Elastic mating piece; 59. Positioning bearing plate; 591. Positioning mating plug rod; 6. Filter carrier plate; 61. Sealing ring plate; 62. Support plate strip; 63. Mating rectangular hole; 7. Movable sealing plate; 71. Mating groove; 72. Connecting plate strip; 73. Sliding mating hole; 74. Upper protruding connecting frame; 75. Third movable hinge rod; 76. Drive carrier plate; 77. Contact block; 78. Movable plug rod; 781. Second connecting spring; 79. Downward driving bar. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figures 1 to 10 The present invention provides a technical solution:

[0033] An airflow pulverizer for refining coarse lithium iron phosphate powder includes an air-powder separation box 1. One end of the air-powder separation box 1 is connected to a filter 11, and the other end is connected to a pulverizing box 12. An air vent pipe 13 is fixedly installed on the pulverizing box 12, and the other end of the air vent pipe 13 is connected to an air compressor 14. A feeding cylinder 15 is fixedly installed on the air vent pipe 13. Supporting rods 151 are symmetrically fixedly installed at both ends of the feeding cylinder 15. A bearing plate 152 is fixedly installed on the end of the supporting rod 151 away from the feeding cylinder 15. A movable through hole 153 is opened on the bearing plate 152. An insertion channel 16 is provided on the lower side of the feeding cylinder 15, and supporting mounting side frames 17 are symmetrically fixedly installed on both sides of the feeding cylinder 15. Bearing rods 171 are symmetrically fixedly installed at both ends of the lower side of the supporting mounting side frames 17. A positioning block 172 is fixedly installed on the end of the bearing fitting member 171 away from the supporting mounting side frame 17. The positioning fitting block 172 has a positioning fitting hole 173. A protruding arch frame 18 is fixedly installed on the supporting mounting side frame 17. A guide fitting hole 181 is opened on the protruding arch frame 18. The supporting mounting side frame 17 above the protruding arch frame 18 has symmetrically opened mounting fitting holes 19. The mounting fitting holes 19 extend to the lower end of the supporting mounting side frame 17. The supporting mounting side frame 17 between the mounting fitting holes 19 has symmetrically opened guide limiting holes 191. A bearing fitting plate 192 is fixedly installed on the supporting mounting side frame 17 between the guide limiting holes 191. An electric telescopic rod 193 is fixedly installed on the bearing fitting plate 192. A material pre-crushing mechanism is installed on the feeding cylinder 15.

[0034] The material pre-crushing mechanism includes a movable carrier plate 2, movable mating strips 3, protective movable cover 4, bearing movable plate strips 5, filter carrier plate 6, and movable sealing plate 7. The movable carrier plate 2 is fixedly installed on the electric telescopic rod 193. The two ends of the movable carrier plate 2 are symmetrically fixedly provided with downward pressure contact strips 21, and the upper ends of the movable carrier plate 2 are symmetrically fixedly provided with guide limit rods 22. The guide limit rods 22 are inserted into the guide limit insertion holes 191, and the upper end of the guide limit rods 22 is fixedly provided with an upward push contact plate 23. The lower end of the movable carrier plate 2 is fixedly installed with a motor 24. A rotating shaft 25 is installed on the motor 24, and a crushing blade 26 is provided on the rotating shaft 25.

[0035] The feed cylinder 15 is symmetrically equipped with movable mating strips 3 on both sides. A drooping connecting plate 31 is fixedly installed on the movable mating strip 3. A first movable hinge rod 32 is hinged to the lower end of the drooping connecting plate 31. An installation connecting rod 33 is also fixedly installed on the movable mating strip 3. The installation connecting rod 33 is inserted into the installation mating hole 19.

[0036] A connecting base block 34 is fixedly installed at the lower end of the mounting connecting rod 33. The connecting base block 34 is located at the lower end of the supporting mounting side frame 17. A first connecting spring 35 is sleeved on the mounting connecting rod 33. The first connecting spring 35 is located on the lower side of the supporting mounting side frame 17. Second movable hinge rods 36 are symmetrically hinged at both ends of the connecting base block 34. In addition, the two ends of the first connecting spring 35 are respectively fixed on the lower end surface of the supporting mounting side frame 17 and the connecting base block 34.

[0037] The lower end of the first movable hinge rod 32 is hinged to a protective movable cover 4. A limit plug rod 41 is fixedly installed on the protective movable cover 4. The limit plug rod 41 is inserted into the guide fitting hole 181, and a connecting plate 42 is fixedly installed on the end of the limit plug rod 41 away from the protective movable cover 4. The connecting plate 42 is hinged to the lower end of the first movable hinge rod 32.

[0038] The upper end of the second movable hinge rod 36 is hinged to a load-bearing movable plate 5. A support mating column 51 is fixedly installed at the upper end of the load-bearing movable plate 5. A mating rectangular column 52 is fixedly installed at the upper end of the support mating column 51. The load-bearing movable plate 5 is symmetrically provided with movable mating holes 53 and insertion mounting holes 54. A load-bearing mating rod 171 is inserted into the movable mating hole 53.

[0039] A mating locking plate 55 is installed on the movable support plate 5. The mating locking plate 55 has a mating through hole 56. A supporting mating post 51 is inserted into the mating through hole 56. Insertion mounting rods 57 are symmetrically fixed on both sides of the lower end of the mating locking plate 55. The insertion mounting rods 57 are inserted into the insertion mounting holes 54. Elastic mating pieces 58 are symmetrically arranged on the mating locking plate 55 between the insertion mounting rods 57. The lower side of the elastic mating pieces 58 is fixed on the movable support plate 5. Positioning support plates 59 are symmetrically fixed on both sides of the mating locking plate 55. Positioning mating inserts 591 are fixed on the positioning support plates 59. When the movable support plate 5 is fixed, the positioning mating inserts 591 are inserted into the positioning mating inserts 173.

[0040] A filter carrier plate 6 is installed on the movable support plate 5. A sealing ring plate 61 is fixedly installed on the filter carrier plate 6. A support plate 62 is fixedly installed on the sealing ring plate 61. A mating rectangular hole 63 is opened on the support plate 62. A mating rectangular post 52 is inserted into the mating rectangular hole 63. In the working state, the filter carrier plate 6 is inserted into the insertion mating channel 16 and contacts the upper and lower end faces of the insertion mating channel 16. The two filter carrier plates 6 are closed together in the working state. At this time, the sealing ring plate 61 contacts the outer end face of the feed cylinder 15 to ensure the sealing of the insertion mating channel 16.

[0041] The discharge cylinder 15 has movable sealing plates 7 symmetrically installed at both ends of its opening. One end of the movable sealing plate 7 has a mating groove 71, and the other end has a connecting strip 72 fixedly installed. The connecting strip 72 has a sliding mating hole 73, and a supporting mating rod 151 is inserted into the sliding mating hole 73. The upper end of the connecting strip 72 is fixedly installed with an upper protruding connecting frame 74, and a third movable hinge rod 75 is hinged on the upper protruding connecting frame 74. In addition, when the movable sealing plates 7 are closed together, the mating groove 71 mates with the rotating shaft 25.

[0042] The upper end of the third movable hinge rod 75 is hinged to a drive carrier plate 76. A contact block 77 is fixedly installed at the upper end of the drive carrier plate 76, and a movable plug rod 78 is fixedly installed at the lower end. The movable plug rod 78 is inserted into the movable mating through hole 153. A second connecting spring 781 is sleeved on the movable plug rod 78, and a downward driving bar 79 is fixedly installed at the lower end of the movable plug rod 78. The second connecting spring 781 is located on the upper side of the bearing fixing plate 152, and the two ends of the second connecting spring 781 are fixed on the bearing fixing plate 152 and the drive carrier plate 76, respectively.

[0043] When the downward-pressing contact strip 21 contacts the contact block 77, but does not push the contact block 77 downward, the feeding cylinder 15 is in the open state, and the filter carrier plate 6 is closed. At this time, material can be added to the feeding cylinder 15. After the material is added, and the protective movable cover 4 is on the side away from the rotating shaft 25, it will not affect the addition of material. After the material is added, the electric telescopic rod 193 is activated to drive the movable carrier plate 2 to move downward, thereby driving the crushing blade 26 to move down to the working position. When the movable carrier plate 2 moves downward, it is pressed by the action of the downward-pressing contact strip 21. Pushing the contact block 77 downwards moves it downwards, which in turn moves the drive plate 76 downwards. This, under the action of the third movable hinge rod 75, pushes the movable sealing plate 7 to move, causing it to close and seal the feed cylinder 15. This prevents material from splashing out during the pre-crushing process by the crusher 26. During pre-crushing, particles smaller than the filter holes of the filter plate 6 pass through the filter plate 6 and enter the vent pipe 13, effectively preventing large particles from entering the vent pipe 13 and avoiding blockage. Furthermore… As the drive plate 76 moves downward, it presses down on the drive bar 79, which in turn pushes the positioning support plate 59 downward, causing it to move downward. This allows the positioning fitting rod 591 to be inserted into the positioning fitting hole 173, thus fixing the movable support plate 5 and the filter plate 6, ensuring the stability of the filter plate 6 during the pre-crushing process. When the filter plate 6 needs cleaning after a period of use, with the feed cylinder 15 in the open state, the electric telescopic rod 193 is activated to move upward, thus pushing the contact plate 23 upward. The movable mating bar 3 will be pushed upward. As the movable mating bar 3 moves upward, under the action of the first movable hinge rod 32, the protective movable cover 4 will move towards the direction of the rotating shaft 25. This allows the protective movable cover 4 to be fitted onto the outside of the crushing blade 26, preventing the crushing blade 26 from injuring people. In addition, as the movable mating bar 3 moves upward, under the action of the second movable hinge rod 36, the carrying movable plate 5 will be pushed away from the feed cylinder 15, thereby causing the filter carrier plate 6 to move out of the insertion mating channel 16, which can be quickly disassembled, which is very convenient and quick.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An airflow pulverizer for refining coarse lithium iron phosphate powder, comprising an air-powder separator (1), characterized in that: One end of the gas-powder separator (1) is connected to a filter (11), and the other end is connected to a crushing box (12). A vent pipe (13) is fixedly installed on the crushing box (12), and the other end of the vent pipe (13) is connected to an air compressor (14). A feed cylinder (15) is fixedly installed on the vent pipe (13). Supporting rods (151) are symmetrically fixedly installed at both ends of the feed cylinder (15). A bearing fixing plate (152) is fixedly installed at the end of the supporting rod (151) away from the feed cylinder (15). A movable fitting through hole (153) is opened on the bearing fixing plate (152). An insertion fitting channel (16) is provided on the lower side of the feed cylinder (15), and supporting mounting side frames (17) are symmetrically fixedly installed on both sides of the feed cylinder (15). Bearing fitting rods (171) are symmetrically fixedly installed at both ends of the lower side of the supporting mounting side frames (17). A positioning block (172) is fixedly provided at one end away from the support mounting side frame (17). The positioning block (172) has a positioning fitting hole (173). A protruding arch frame (18) is fixedly provided on the support mounting side frame (17). A guide fitting hole (181) is provided on the protruding arch frame (18). Installation fitting holes (19) are symmetrically provided on the support mounting side frame (17) above the protruding arch frame (18). The installation fitting holes (19) extend to the lower end of the support mounting side frame (17). Guide limiting holes (191) are symmetrically provided on the support mounting side frame (17) between the installation fitting holes (19). A bearing fitting plate (192) is fixedly provided on the support mounting side frame (17) between the guide limiting holes (191). An electric telescopic rod (193) is fixedly installed on the bearing fitting plate (192). A material pre-crushing mechanism is installed on the feeding cylinder (15). The material pre-crushing mechanism includes a movable carrier plate (2), a movable mating strip (3), a protective movable cover (4), a bearing movable plate strip (5), a filter carrier plate (6), and a movable sealing plate (7). The movable carrier plate (2) is fixedly installed on an electric telescopic rod (193). The two ends of the movable carrier plate (2) are symmetrically fixedly provided with downward pressure contact strips (21), and the upper ends of the movable carrier plate (2) are symmetrically fixedly provided with guide limiting rods (22). The guide limiting rods (22) are inserted into guide limiting holes (191), and the upper end of the guide limiting rods (22) is fixedly provided with an upward push contact plate (23). The lower end of the movable carrier plate (2) is fixedly installed with a motor (24). The motor (24) is equipped with a rotating shaft (25), and the rotating shaft (25) is equipped with a crushing blade (26). The feed cylinder (15) is symmetrically equipped with movable mating strips (3) on both sides. A drooping connecting plate (31) is fixedly provided on the movable mating strip (3). A first movable hinge rod (32) is hinged to the lower end of the drooping connecting plate (31). An installation connecting rod (33) is also fixedly provided on the movable mating strip (3). The installation connecting rod (33) is inserted into the installation mating hole (19). The lower end of the mounting connecting rod (33) is fixedly provided with a connecting base block (34), the connecting base block (34) is located at the lower end of the supporting mounting side frame (17), and a first connecting spring (35) is sleeved on the mounting connecting rod (33), the first connecting spring (35) is located at the lower side of the supporting mounting side frame (17), and the two ends of the connecting base block (34) are symmetrically hinged with second movable hinge rods (36). The discharge cylinder (15) has movable sealing plates (7) symmetrically installed at both ends of its opening. One end of the movable sealing plate (7) is provided with a mating groove (71), and the other end is fixedly provided with a connecting strip (72). The connecting strip (72) is provided with a sliding mating hole (73), and a supporting mating rod (151) is inserted into the sliding mating hole (73). The upper end of the connecting strip (72) is fixedly provided with an upper protruding connecting frame (74), and a third movable hinge rod (75) is hinged on the upper protruding connecting frame (74). The upper end of the third movable hinge rod (75) is hinged to a drive carrier plate (76). The upper end of the drive carrier plate (76) is fixedly provided with a contact block (77), and the lower end is fixedly provided with a movable plug rod (78). The movable plug rod (78) is inserted into the movable mating through hole (153). A second connecting spring (781) is sleeved on the movable plug rod (78), and a downward driving bar (79) is fixedly provided at the lower end of the movable plug rod (78).

2. The air jet mill for refining coarse lithium iron phosphate powder according to claim 1, characterized in that: The lower end of the first movable hinge rod (32) is hinged to a protective movable cover (4). A limiting plug rod (41) is fixedly provided on the protective movable cover (4). The limiting plug rod (41) is inserted into the guide fitting hole (181). A connecting plate (42) is fixedly provided on the end of the limiting plug rod (41) away from the protective movable cover (4). The connecting plate (42) is hinged to the lower end of the first movable hinge rod (32).

3. The air jet mill for refining coarse lithium iron phosphate powder according to claim 2, characterized in that: The upper end of the second movable hinge rod (36) is hinged to a load-bearing movable plate (5), and a support mating column (51) is fixedly provided at the upper end of the load-bearing movable plate (5). A mating rectangular column (52) is fixedly provided at the upper end of the support mating column (51). The load-bearing movable plate (5) is symmetrically provided with movable mating holes (53) and insertion mounting holes (54). A load-bearing mating rod (171) is inserted into the movable mating hole (53).

4. The air jet mill for refining coarse lithium iron phosphate powder according to claim 3, characterized in that: A mating locking plate (55) is installed on the movable support plate (5). A mating through hole (56) is opened on the mating locking plate (55). A supporting mating column (51) is inserted into the mating through hole (56). Insertion mounting rods (57) are symmetrically fixed on both sides of the lower end of the mating locking plate (55). The insertion mounting rods (57) are inserted into the insertion mounting holes (54). Elastic mating pieces (58) are symmetrically arranged on the mating locking plate (55) between the insertion mounting rods (57). Positioning support plates (59) are symmetrically fixed on both sides of the mating locking plate (55). Positioning mating inserts (591) are fixedly arranged on the positioning support plates (59).

5. The air jet mill for refining coarse lithium iron phosphate powder according to claim 4, characterized in that: A filter carrier plate (6) is installed on the movable support plate (5). A sealing ring plate (61) is fixedly installed on the filter carrier plate (6). A support plate (62) is fixedly installed on the sealing ring plate (61). A mating rectangular hole (63) is opened on the support plate (62). A mating rectangular post (52) is inserted into the mating rectangular hole (63).

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