Jet mill for fine grinding of regenerated lithium iron phosphate coarse powder

Abstract

The invention relates to the technical field of jet pulverizers, in particular to a jet pulverizer for fine grinding of regenerated lithium iron phosphate coarse powder, which comprises a gas-powder separation box, one end of the gas-powder separation box is connected with a filter, the other end of the gas-powder separation box is connected with a pulverizing box, a breather pipe is fixedly arranged on the pulverizing box, and the other end of the breather pipe is connected with an air compressor. A feeding barrel is fixedly arranged on the ventilation pipe, supporting matching rod pieces are symmetrically and fixedly arranged at the two ends of a barrel opening of the feeding barrel, a smashing cutter is arranged in the feeding barrel, and the smashing cutter can preliminarily smash added materials during feeding; crushed materials penetrate through a filtering support plate, enter a ventilation pipe and enter a crushing box along with airflow to be crushed, and under the action of a crushing cutter, large materials can be prevented from entering the crushing box, so that the phenomenon that a crushing system is blocked is well avoided; meanwhile, through preliminary crushing, the working efficiency of crushing of the jet mill can be further improved, and the jet mill is very practical.

Description

Technical Field

[0001] The invention relates to the technical field of air flow pulverizers, in particular to an air flow pulverizer for fine grinding of coarse powder of regenerated lithium iron phosphate. Background Art

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

[0003] When recycling used lithium batteries, it is necessary to collect and reuse the lithium iron phosphate, the positive electrode material of the lithium battery. That is, black powder will adhere to the aluminum sheet of the lithium battery, and the black powder needs to be removed from the aluminum sheet for collection. First, the sheet material needs to be passed through a vibrating screen for powdering, and then transferred to a hot drying cylinder for drying, and then enters a rotary kiln for degumming to collect the lithium iron phosphate black powder. The collected black powder also needs to be crushed by an air flow mill to control the powder particle size to ensure that it meets the collection requirements. The existing air flow mill lacks a particle pretreatment mechanism during use and cannot perform preliminary crushing of the particles. When some larger particles enter the crushing system, it is easy to cause blockage of the crushing system, and then the material backflow occurs. The inability to pre-crush the particles also makes the crushing speed of the air flow mill slow and the working efficiency is relatively low. Summary of the invention

[0004] The object of the present invention is to provide a jet mill for fine grinding of coarse powder of regenerated lithium iron phosphate to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An air flow pulverizer for fine grinding of coarse powder of regenerated lithium iron phosphate comprises 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 crushing box, a ventilation pipe is fixedly arranged on the crushing box, the other end of the ventilation pipe is connected to an air compressor, and a discharge barrel is fixedly arranged on the ventilation pipe, and supporting and matching rods are symmetrically fixedly arranged at both ends of the barrel mouth of the discharge barrel, a bearing fixing plate is fixedly arranged at one end of the supporting and matching rod away from the discharge barrel, a movable matching through hole is opened on the bearing fixing plate, a plug-in matching channel is arranged on the lower side of the discharge barrel, and supporting and mounting side frames are symmetrically fixedly arranged on both sides of the discharge barrel, and bearing matching rods are symmetrically fixedly arranged at both ends of the lower side of the supporting and mounting side frames. A combining rod, a positioning matching block is fixedly provided on the end of the load-bearing matching rod away from the supporting mounting side frame, a positioning matching block is provided on the positioning matching hole, a protruding arch frame is fixedly provided on the supporting mounting side frame, a guide matching hole is provided on the protruding arch frame, and mounting matching holes are symmetrically provided on the supporting mounting side frame on the upper side of the protruding arch frame, the mounting matching holes pass through to the lower end of the supporting mounting side frame, and guide limit holes are symmetrically provided on the supporting mounting side frame between the mounting matching holes, a load-bearing matching disk is fixedly provided on the supporting mounting side frame between the guide limit holes, an electric telescopic rod is fixedly installed on the load-bearing matching disk, and a material pre-crushing mechanism is installed on the unloading barrel.

[0007] Preferably, the material pre-crushing mechanism includes a movable carrier plate, a movable matching strip, a protective movable cover, a bearing movable plate strip, a filter carrier plate and a movable sealing plate. The movable carrier plate is fixedly mounted on the electric telescopic rod, and downward pressing contact strips are symmetrically fixedly arranged at both ends of the movable carrier plate, and guide limit rods are symmetrically fixedly arranged on both sides of the upper end of the movable carrier plate, the guide limit rods are inserted into the guide limit sockets, and an upward push contact plate is fixedly arranged on the upper end of the guide limit rods, and a motor is fixedly mounted on the lower end of the movable carrier plate, a rotating shaft is mounted on the motor, and a crushing knife is arranged on the rotating shaft.

[0008] Preferably, movable matching strips are symmetrically installed on both sides of the discharge barrel, a drooping connecting plate is fixedly provided on the movable matching strip, a first movable hinged rod is hinged at the lower end of the drooping connecting plate, and an installation connecting rod is also fixedly provided on the movable matching strip, and the installation connecting rod is inserted in the installation matching socket.

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

[0010] Preferably, a protective movable cover is hinged at the lower end of the first movable hinge rod, a limiting plug-in rod is fixedly provided on the protective movable cover, the limiting plug-in rod is plugged into the guide matching socket, and a connecting vertical plate is fixedly provided on the end of the limiting plug-in rod away from the protective movable cover, and the connecting vertical plate is hinged to the lower end of the first movable hinge rod.

[0011] Preferably, the upper end of the second movable hinged rod is hinged with a load-bearing movable slat, the upper end of the load-bearing movable slat is fixedly provided with a supporting matching column, the upper end of the support matching column is fixedly provided with a matching rectangular column, and the load-bearing movable slat is symmetrically provided with movable matching holes and plug-in installation holes, and the load-bearing matching rod is plugged into the movable matching hole.

[0012] Preferably, a matching lock plate is installed on the supporting movable slat, and a matching through hole is opened on the matching lock plate, and a supporting matching column is inserted in the matching through hole, and plug-in mounting rods are symmetrically fixed on both sides of the lower end of the matching lock plate, and the plug-in mounting rods are inserted in the plug-in mounting holes, and elastic matching pieces are symmetrically arranged on the matching lock plate between the plug-in mounting rods, and positioning bearing plates are symmetrically fixed on both sides of the matching lock plate, and positioning matching plug-in rods are fixed on the positioning bearing plates.

[0013] Preferably, a filter carrier is installed on the bearing movable slat, a sealing ring plate is fixedly provided on the filter carrier, a supporting slat is fixedly provided on the sealing ring plate, a matching rectangular hole is opened on the supporting slat, and a matching rectangular column is inserted in the matching rectangular hole.

[0014] Preferably, movable sealing plates are symmetrically installed at both ends of the barrel mouth of the discharge barrel, one end of the movable sealing plate is provided with a matching groove, and the other end is fixedly provided with a connecting strip, the connecting strip is provided with a sliding matching hole, and a supporting matching rod is inserted in the sliding matching hole, and an upper convex connecting frame is fixedly provided at the upper end of the connecting strip, and a third movable hinged rod is hinged on the upper convex connecting frame.

[0015] Preferably, the upper end of the third movable hinged rod is hinged with 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 in the movable matching through hole, the movable plug rod is sleeved with a second connecting spring, and the lower end of the movable plug rod is fixedly provided with a downward driving strip.

[0016] Compared with the prior art, the invention has the following advantages:

[0017] 1. A crushing knife is provided in the discharge barrel. When adding materials, the crushing knife can perform preliminary crushing on the added materials. The crushed materials pass through the filter carrier plate into the ventilation pipe and enter the crushing box with the air flow for crushing. Under the action of the crushing knife, larger materials can be prevented from entering the crushing box, which effectively avoids the blockage of the crushing system. At the same time, the preliminary crushing can further improve the crushing efficiency of the airflow crusher, which is very practical.

[0018] 2. After adding materials into the lower barrel, start the electric telescopic rod to drive the movable carrier plate to move downward, so that when the crushing knife reaches the working position, the movable carrier plate will push the driving carrier plate to move downward under the action of the movable carrier plate, and then the movable sealing plate will be pushed to move under the action of the third movable hinged rod, so that the movable sealing plate will seal the barrel mouth of the lower barrel, so that the crushing knife can prevent the material from splashing out during the crushing process. Moreover, as the driving carrier plate moves downward, the driving bar will push the matching lock plate downward under the action of the downward pressure, so that the positioning matching plug rod is inserted into the positioning matching plug hole, so as to fix the filter carrier plate, thereby ensuring its stability during the crushing process.

[0019] 3. In addition, when the filter carrier needs to be cleaned after being used for a period of time, the electric telescopic rod is started to drive the movable carrier plate to move upward, which will drive the movable matching bar to move upward, and the crushing knife will also move out of the discharge barrel. As the movable matching bar moves upward, the protective movable cover will move toward each other under the action of the first movable hinged rod, so that it is covered on the crushing knife to prevent the crushing knife from injuring the staff. At the same time, as the movable matching bar moves upward, the filter carrier plate will be driven to move out of the plug-in matching channel under the action of the second movable hinged rod, and the filter carrier plate can be quickly disassembled, which is very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The schematic diagram of the assembly of the air flow mill.

[0021] Figure 2 for Figure 1 A magnified schematic diagram of center A.

[0022] Figure 3 It is a schematic diagram of the structure of the air flow mill.

[0023] Figure 4 for Figure 3 A magnified schematic diagram of point B in the middle.

[0024] Figure 5 It is a structural schematic diagram of the movable carrier.

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

[0026] Figure 7 It is a schematic diagram of the assembly of the movable matching strip, the load-bearing movable plate strip and the filter carrier plate.

[0027] Figure 8 Schematic diagram of the first perspective of the load-bearing movable slat assembly.

[0028] Fig. 9 A second perspective diagram of the load-bearing movable slat assembly.

[0029] Fig.10 The figure is a schematic diagram of the assembly of the movable sealing plate.

[0030] In the figure: 1. gas-powder separation box; 11. filter; 12. crushing box; 13. ventilation pipe; 14. air compressor; 15. unloading barrel; 151. supporting matching rod; 152. bearing fixing plate; 153. movable matching through hole; 16. plug-in matching channel; 17. supporting and mounting side frame; 171. bearing matching rod; 172. positioning matching block; 173. positioning matching socket; 18. protruding arch frame; 181. guide matching socket; 19. mounting matching socket; 191. guide limit socket; 192. bearing matching plate; 193. electric telescopic rod; 2. movable carrier plate; 21. pressing contact strip; 22. guide limit rod; 23. pushing contact plate; 24. motor; 25. rotating shaft; 26. crushing knife; 3. movable matching strip; 31. drooping connecting plate; 32. first movable hinged rod; 33. mounting connecting plug rod ; 34. Connecting bottom block; 35. First connecting spring; 36. Second movable hinged rod; 4. Protective movable cover; 41. Limiting plug-in rod; 42. Connecting vertical plate; 5. Carrying movable plate strip; 51. Support matching column; 52. Matching rectangular column; 53. Active matching hole; 54. Plug-in installation hole; 55. Matching lock plate; 56. Matching through hole; 57. Plug-in installation rod; 58. Elastic matching sheet; 59. Positioning bearing plate; 591. Positioning matching plug-in rod; 6. Filter carrier; 61. Sealing ring plate; 62. Support plate strip; 63. Matching rectangular hole; 7. Movable sealing plate; 71. Matching groove; 72. Connecting plate strip; 73. Sliding matching hole; 74. Upper convex connecting frame; 75. Third movable hinged rod; 76. Drive carrier; 77. Contact block; 78. Movable plug-in rod; 781. Second connecting spring; 79. Press down drive strip. DETAILED DESCRIPTION

[0031] 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 technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figures 1 to 10 , the present invention provides a technical solution:

[0033] The air flow pulverizer for fine grinding of coarse powder of regenerated lithium iron phosphate comprises 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 crushing box 12, a vent pipe 13 is fixedly provided on the crushing box 12, the other end of the vent pipe 13 is connected to an air compressor 14, and a discharge barrel 15 is fixedly provided on the vent pipe 13, and supporting and matching rods 151 are symmetrically fixedly provided at both ends of the barrel mouth of the discharge barrel 15, a bearing fixing plate 152 is fixedly provided at one end of the supporting and matching rod 151 away from the discharge barrel 15, and a movable matching through hole 153 is opened on the bearing fixing plate 152, a plug-in matching channel 16 is provided on the lower side of the discharge barrel 15, and supporting and mounting side frames 17 are symmetrically fixedly provided on both sides of the discharge barrel 15, and bearing and matching rods 171 are symmetrically fixedly provided at both ends of the lower side of the supporting and mounting side frames 17. A positioning matching block 172 is fixedly provided on the end of the load-bearing matching rod 171 away from the supporting and installing side frame 17, and a positioning matching socket 173 is provided on the positioning matching block 172; a protruding arch frame 18 is fixedly provided on the supporting and installing side frame 17; a guide matching socket 181 is provided on the protruding arch frame 18, and installation matching sockets 19 are symmetrically provided on the supporting and installing side frame 17 on the upper side of the protruding arch frame 18, and the installation matching sockets 19 pass through to the lower end of the supporting and installing side frame 17, and guide limit sockets 191 are symmetrically provided on the supporting and installing side frame 17 between the installation matching sockets 19, a load-bearing matching disk 192 is fixedly provided on the supporting and installing side frame 17 between the guide limit sockets 191, and an electric telescopic rod 193 is fixedly installed on the load-bearing matching disk 192, and a material pre-crushing mechanism is installed on the unloading barrel 15.

[0034] The material pre-crushing mechanism includes a movable carrier plate 2, a movable matching 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 the electric telescopic rod 193. The two ends of the movable carrier plate 2 are symmetrically fixed with downward pressing contact strips 21, and the two sides of the upper end of the movable carrier plate 2 are symmetrically fixed with guide limit rods 22. The guide limit rods 22 are inserted into the guide limit socket 191, and the upper end of the guide limit rod 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 knife 26 is arranged on the rotating shaft 25.

[0035] The two sides of the unloading barrel 15 are symmetrically installed with movable matching strips 3, on which a drooping connecting plate 31 is fixedly provided, and the lower end of the drooping connecting plate 31 is hinged with a first movable hinged rod 32, and the movable matching strip 3 is also fixedly provided with an installation connecting rod 33, which is inserted into the installation matching socket 19.

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

[0037] The lower end of the first movable hinge rod 32 is hinged with a protective movable cover 4, and a limit plug-in rod 41 is fixedly provided on the protective movable cover 4. The limit plug-in rod 41 is inserted into the guide matching socket 181, and a connecting vertical plate 42 is fixedly provided on the end of the limit plug-in rod 41 away from the protective movable cover 4, and the connecting vertical plate 42 is hinged to the lower end of the first movable hinge rod 32.

[0038] The upper end of the second movable hinged rod 36 is hinged with a bearing movable slat 5, and a supporting matching column 51 is fixedly provided on the upper end of the bearing movable slat 5, and a matching rectangular column 52 is fixedly provided on the upper end of the supporting matching column 51, and a movable matching hole 53 and a plug-in installation hole 54 are symmetrically opened on the bearing movable slat 5, and a bearing matching rod 171 is plugged into the movable matching hole 53.

[0039] A matching lock plate 55 is installed on the supporting movable slat 5, and a matching through hole 56 is opened on the matching lock plate 55, in which a supporting matching column 51 is inserted, and plug-in mounting rods 57 are symmetrically fixedly arranged on both sides of the lower end of the matching lock plate 55, and the plug-in mounting rods 57 are inserted in the plug-in mounting holes 54, and elastic matching pieces 58 are symmetrically arranged on the matching lock plate 55 between the plug-in mounting rods 57, and the lower side of the elastic matching piece 58 is fixed on the supporting movable slat 5, and positioning bearing plates 59 are symmetrically fixedly arranged on both sides of the matching lock plate 55, and a positioning matching plug rod 591 is fixedly arranged on the positioning bearing plate 59, and the positioning matching plug rod 591 is inserted in the positioning matching plug hole 173 to fix the supporting movable slat 5.

[0040] A filter carrier plate 6 is installed on the supporting movable slat 5, a sealing ring plate 61 is fixedly provided on the filter carrier plate 6, a support slat 62 is fixedly provided on the sealing ring plate 61, a matching rectangular hole 63 is opened on the support slat 62, a matching rectangular column 52 is inserted in the matching rectangular hole 63, the filter carrier plate 6 is inserted in the plug-in matching channel 16 in the working state, and contacts the upper and lower end faces of the plug-in matching channel 16, and the two filter carrier plates 6 are closed together in the working state, at which time the sealing ring plate 61 contacts the outer end face of the discharge barrel 15 to ensure the sealing at the plug-in matching channel 16.

[0041] Movable sealing plates 7 are symmetrically installed at both ends of the barrel mouth of the unloading barrel 15. A matching groove 71 is provided at one end of the movable sealing plate 7, and a connecting strip 72 is fixedly provided at the other end. A sliding matching hole 73 is provided on the connecting strip 72, and a supporting matching rod 151 is inserted in the sliding matching hole 73. An upper convex connecting frame 74 is fixedly provided at the upper end of the connecting strip 72, and a third movable hinged rod 75 is hinged on the upper convex connecting frame 74. In addition, when the movable sealing plates 7 are closed together, the matching groove 71 cooperates with the rotating shaft 25.

[0042] The upper end of the third movable hinged rod 75 is hinged with a driving carrier plate 76, the upper end of the driving 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 in the movable matching 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, the second connecting spring 781 is located on the upper side of the bearing fixed plate 152, and the two ends of the second connecting spring 781 are respectively fixed on the bearing fixed plate 152 and the driving carrier plate 76.

[0043] When the contact strip 21 is pressed down to contact the contact block 77 but the contact block 77 is not pushed down, the lower barrel 15 is in an open state, and the filter carrier plate 6 is closed at this time. At this time, material can be added to the lower barrel 15. After the material is added, the protective movable cover 4 is at a side away from the rotating shaft 25, which will not affect the addition of the material. After the material is added, the electric telescopic rod 193 is started to drive the movable carrier plate 2 to move downward, and then drive the crushing knife 26 to move down to the working point. When the movable carrier plate 2 moves downward, it will be pressed down by the contact strip 21. The contact block 77 is pushed downward to move downward, thereby driving the driving carrier plate 76 to move downward, so that the movable sealing plate 7 is pushed to move under the action of the third movable hinge rod 75, so that the movable sealing plate 7 is closed together, and the lower barrel 15 is closed, so that the crushing knife 26 can prevent the material from splashing out when pre-crushing the material. In the process of pre-crushing, particles with a particle size smaller than the filter hole size of the filter carrier plate 6 pass through the filter carrier plate 6 and enter the ventilation pipe 13, which effectively prevents large particles from entering the ventilation pipe 13 and avoids the occurrence of blockage. In the process of driving the carrier plate 76 to move downward, the driving bar 79 is pressed downward to push the positioning carrier plate 59 downward, thereby making it move downward, so that the positioning matching plug rod 591 can be inserted into the positioning matching plug hole 173, so as to realize the fixation of the supporting movable plate strip 5, and then realize the fixation of the filter carrier plate 6, and ensure the stability of the filter carrier plate 6 during the pre-crushing process. When the filter carrier plate 6 needs to be cleaned after being used for a period of time, when the lower barrel 15 is in the open state, the electric telescopic rod 193 is started to move upward, so that under the action of the upward push contact plate 23, the filter carrier plate 6 can be cleaned. The movable matching strip 3 will be pushed to move upward. As the movable matching strip 3 moves upward, the protective movable cover 4 will be driven to move toward the direction of the rotating shaft 25 under the action of the first movable hinged rod 32, so that the protective movable cover 4 can be sleeved on the outside of the crushing knife 26 to prevent the crushing knife 26 from hurting people. In addition, as the movable matching strip 3 moves upward, the supporting movable plate strip 5 will be pushed to move away from the discharge barrel 15 under the action of the second movable hinged rod 36, thereby driving the filter carrier plate 6 to move out of the plug-in matching channel 16, so that it can be quickly disassembled, which is very convenient and quick.

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

Claims

1. A jet mill for fine grinding of coarse powder of regenerated lithium iron phosphate, comprising a gas-powder separation box (1), characterized in that: One end of the gas-powder separation box (1) is connected to a filter (11), and the other end is connected to a crushing box (12); a ventilation pipe (13) is fixedly provided on the crushing box (12); the other end of the ventilation pipe (13) is connected to an air compressor (14); and a lower barrel (15) is fixedly provided on the ventilation pipe (13); two ends of the barrel mouth of the lower barrel (15) are symmetrically fixedly provided with supporting and matching rods (151); one end of the supporting and matching rod (151) away from the lower barrel (15) is fixedly provided with a bearing fixing plate (152); a movable matching through hole (153) is provided on the bearing fixing plate (152); a plug-in matching channel (16) is provided on the lower side of the lower barrel (15); and supporting and mounting side frames (17) are symmetrically fixedly provided on both sides of the lower barrel (15); two ends of the lower side of the supporting and mounting side frames (17) are symmetrically fixedly provided with bearing and matching rods (171); A positioning matching block (172) is fixedly provided at one end away from the supporting mounting side frame (17), and a positioning matching plug hole (173) is provided on the positioning matching block (172). A protruding arch frame (18) is fixedly provided on the supporting mounting side frame (17), and a guide matching plug hole (181) is provided on the protruding arch frame (18), and a mounting matching plug hole (19) is symmetrically provided on the supporting mounting side frame (17) on the upper side of the protruding arch frame (18), and the mounting matching plug hole (19) passes through to the lower end of the supporting mounting side frame (17), and a guide limit plug hole (191) is symmetrically provided on the supporting mounting side frame (17) between the mounting matching plug holes (19), and a bearing matching disk (192) is fixedly provided on the supporting mounting side frame (17) between the guide limit plug holes (191), and an electric telescopic rod (193) is fixedly installed on the bearing matching disk (192), and a material pre-crushing mechanism is installed on the unloading barrel (15).

2. The jet mill for fine grinding of regenerated lithium iron phosphate coarse powder according to claim 1, characterized in that: The material pre-crushing mechanism comprises a movable carrier plate (2), a movable matching 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 mounted on an electric telescopic rod (193); downward pressing contact strips (21) are symmetrically fixedly arranged at both ends of the movable carrier plate (2); and guide limit rods (22) are symmetrically fixedly arranged on both sides of the upper end of the movable carrier plate (2); the guide limit rods (22) are inserted into the guide limit plug holes (191); and an upward pushing contact plate (23) is fixedly arranged at the upper end of the guide limit rods (22); a motor (24) is fixedly mounted at the lower end of the movable carrier plate (2); a rotating shaft (25) is mounted on the motor (24); and a crushing knife (26) is arranged on the rotating shaft (25).

3. The jet mill for fine grinding of regenerated lithium iron phosphate coarse powder according to claim 2, characterized in that: The two sides of the discharge barrel (15) are symmetrically provided with movable matching strips (3), a drooping connecting plate (31) is fixedly provided on the movable matching strip (3), a first movable hinged rod (32) is hinged at the lower end of the drooping connecting plate (31), and a mounting connecting rod (33) is also fixedly provided on the movable matching strip (3), and the mounting connecting rod (33) is inserted into the mounting matching socket (19).

4. The jet mill for fine grinding of regenerated lithium iron phosphate coarse powder according to claim 3, characterized in that: A connecting bottom block (34) is fixedly provided at the lower end of the mounting connecting rod (33), the connecting bottom 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 second movable hinged rods (36) are symmetrically hinged at both ends of the connecting bottom block (34).

5. The jet mill for fine grinding of regenerated lithium iron phosphate coarse powder according to claim 4, characterized in that: The lower end of the first movable hinged rod (32) is hingedly connected to a protective movable cover (4), a limit plug-in rod (41) is fixedly provided on the protective movable cover (4), the limit plug-in rod (41) is plugged into the guide matching socket (181), and a connecting vertical plate (42) is fixedly provided on the end of the limit plug-in rod (41) away from the protective movable cover (4), and the connecting vertical plate (42) is hingedly connected to the lower end of the first movable hinged rod (32).

6. The jet mill for fine grinding of regenerated lithium iron phosphate coarse powder according to claim 5, characterized in that: The upper end of the second movable hinged rod (36) is hinged with a bearing movable slat (5), the upper end of the bearing movable slat (5) is fixedly provided with a supporting matching column (51), the upper end of the supporting matching column (51) is fixedly provided with a matching rectangular column (52), and the bearing movable slat (5) is symmetrically provided with a movable matching hole (53) and a plug-in installation hole (54), and a bearing matching rod (171) is plugged into the movable matching hole (53).

7. The jet mill for fine grinding of regenerated lithium iron phosphate coarse powder according to claim 6, characterized in that: A matching lock plate (55) is installed on the supporting movable slat (5), and a matching through hole (56) is opened on the matching lock plate (55), and a supporting matching column (51) is inserted in the matching through hole (56). Insertion mounting rods (57) are symmetrically fixedly arranged on both sides of the lower end of the matching lock plate (55), and the insertion mounting rods (57) are inserted in the insertion mounting holes (54), and elastic matching pieces (58) are symmetrically arranged on the matching lock plate (55) between the insertion mounting rods (57). Positioning bearing plates (59) are symmetrically fixedly arranged on both sides of the matching lock plate (55), and a positioning matching insertion rod (591) is fixedly arranged on the positioning bearing plate (59).

8. The jet mill for fine grinding of regenerated lithium iron phosphate coarse powder according to claim 7, characterized in that: A filter carrier plate (6) is mounted on the bearing movable slat (5), a sealing ring plate (61) is fixedly arranged on the filter carrier plate (6), a supporting slat (62) is fixedly arranged on the sealing ring plate (61), a matching rectangular hole (63) is opened on the supporting slat (62), and a matching rectangular column (52) is inserted into the matching rectangular hole (63).

9. The jet mill for fine grinding of regenerated lithium iron phosphate coarse powder according to claim 8, characterized in that: Movable sealing plates (7) are symmetrically mounted at both ends of the barrel mouth of the discharge barrel (15); a matching groove (71) is provided at one end of the movable sealing plate (7), and a connecting strip (72) is fixedly arranged at the other end; a sliding matching hole (73) is provided on the connecting strip (72), a supporting matching rod (151) is inserted into the sliding matching hole (73), and an upper convex connecting frame (74) is fixedly arranged at the upper end of the connecting strip (72); a third movable hinged rod (75) is hinged on the upper convex connecting frame (74).

10. The jet mill for fine grinding of regenerated lithium iron phosphate coarse powder according to claim 9, characterized in that: The upper end of the third movable hinged rod (75) is hinged with a driving carrier plate (76), the upper end of the driving 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 plugged into the movable matching through hole (153), a second connecting spring (781) is sleeved on the movable plug rod (78), and a downward pressing driving strip (79) is fixedly provided at the lower end of the movable plug rod (78).

Images