A grinding mechanism of an air flow mill

Abstract

This utility model discloses a grinding mechanism for an air jet mill, belonging to the field of air jet mill technology. It includes a grinding cylinder with multiple crushing mechanisms on its side, multiple air blowing pipes fixedly connected to the side of the grinding cylinder, a conveying pipe fixedly connected to the side of the grinding cylinder, a storage hopper fixedly connected to the top of the conveying pipe, and an arc-shaped mesh fixedly fitted to the top of the conveying pipe. In this utility model, when grinding lithium iron phosphate, the heating plate is energized, causing the conveying pipe to generate heat. Simultaneously, a first motor drives a spiral conveyor rod to rotate, using the spiral conveyor rod to guide the lithium iron phosphate from the storage hopper into the inner cavity of the grinding cylinder through the conveying pipe. The heat from the conveying pipe simultaneously heats and dries the lithium iron phosphate, causing the generated water vapor to dissipate to the outside through the arc-shaped mesh, ensuring the lithium iron phosphate remains dry and thus guaranteeing the quality of the lithium iron phosphate air jet mill.

Description

Technical Field

[0001] This utility model relates to the field of air jet mill technology, and more specifically, to a grinding mechanism for an air jet mill. Background Technology

[0002] Lithium iron phosphate (LFP) is an electrode material for lithium-ion batteries, characterized by its large capacity, low price, non-toxicity, and lack of environmental pollution. Due to its excellent performance, it has gained significant popularity in the new energy market. In the production process of LFP, it needs to be ground into granules using a mill. An air jet mill, also known as a jet mill or fluid energy mill, works by using nozzles installed around the mill to spray high-pressure air or superheated steam to create a high-speed airflow. This airflow causes the material particles to undergo intense impact, collision, and friction within the grinding chamber, ultimately achieving a pulverizing effect. Because of the large velocity gradient near the nozzles, most of the pulverizing action is concentrated there, and the collision frequency between particles is much higher than that with the mill walls.

[0003] However, existing air jet mills are not suitable for drying materials. When the material contains moisture, it affects the quality of the air jet mill. In addition, the high-speed gas can only move the material along a predetermined path. When the material falls to other positions, it cannot be properly pulverized, affecting the working quality of the air jet mill. To address this, we propose a grinding mechanism for an air jet mill. Utility Model Content

[0004] In view of the problems mentioned in the background art above, the purpose of this utility model is to provide a grinding mechanism for an air jet mill.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] A grinding mechanism for an air jet mill includes a grinding cylinder, with multiple crushing mechanisms arranged on the side of the grinding cylinder, multiple air blowing pipes fixedly connected to the side of the grinding cylinder, a conveying pipe fixedly connected to the side of the grinding cylinder, a storage hopper fixedly connected to the top of the conveying pipe, an arc-shaped mesh fixedly sleeved on the top of the conveying pipe, a first motor fixedly installed on the end face of the storage hopper, the output shaft of the first motor extending into the inner cavity of the storage hopper and fixedly connected to a spiral conveying rod via a coupling, the end of the spiral conveying rod extending through the inner cavity of the conveying pipe into the inner cavity of the grinding cylinder, and a heating plate fixedly sleeved on the bottom of the conveying pipe.

[0007] As a preferred embodiment of the present invention, the crushing mechanism includes a second motor fixedly installed on the side of the crushing cylinder, the output shaft of the second motor extending into the inner cavity of the crushing cylinder and fixedly connected to a crushing shaft via a coupling, and a plurality of crushing blades fixedly connected to the side of the crushing shaft.

[0008] In a preferred embodiment of this utility model, a support base is fixedly connected to the bottom of the crushing cylinder, and a control panel is fixedly connected to the side of the support base. The control panel is electrically connected to the second motor, the first motor, and the heating plate.

[0009] As a preferred embodiment of this utility model, a support frame is fixedly connected to the side of the support base, an air distribution cylinder is provided on the top surface of the support frame, an air inlet pipe is provided on the side of the air distribution cylinder, and multiple air guide pipes are fixedly sleeved on the air distribution cylinder, with the ends of the multiple air guide pipes connected to multiple blower pipes.

[0010] As a preferred embodiment of this utility model, the top of the storage hopper is threaded with a threaded cap, the end of which extends into the inner cavity of the storage hopper.

[0011] As a preferred embodiment of this utility model, the top of the crushing cylinder is provided with a grading structure, and a powder discharge pipe is provided on the crushing cylinder, the end of the powder discharge pipe being connected to the end of the grading structure.

[0012] The advantages of this utility model are:

[0013] (1) In this utility model, when lithium iron phosphate is crushed, the heating plate is energized to generate heat in the conveying pipe. At the same time, the first motor drives the spiral conveying rod to rotate. The spiral conveying rod drives the lithium iron phosphate in the inner cavity of the storage hopper to be introduced from the conveying pipe into the inner cavity of the crushing cylinder. At the same time, the heat on the conveying pipe is used to heat and dry the lithium iron phosphate, so that the generated water vapor is dissipated from the arc-shaped mesh to the outside, ensuring that the lithium iron phosphate is in a dry state, thereby ensuring the quality of the lithium iron phosphate air jet mill.

[0014] (2) In this utility model, by using the second motor, the crushing shaft and the crushing blade together, the lithium iron phosphate is crushed by the high-speed airflow. At the same time, the second motor drives the crushing shaft and the crushing blade to rotate, and the crushing blade assists the airflow to crush the lithium iron phosphate, ensuring the quality of crushing the lithium iron phosphate and achieving high working efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic cross-sectional view of the present invention;

[0017] Figure 3 This is a schematic diagram of the crushing mechanism of this utility model;

[0018] Figure 4 This utility model Figure 2 Enlarged diagram of point A in the diagram.

[0019] The following are the labels in the diagram: 1. Crushing cylinder; 2. Crushing mechanism; 3. Conveying pipe; 4. Storage hopper; 5. Arc-shaped mesh; 6. Heating plate; 7. First motor; 8. Spiral conveyor rod; 9. Threaded cover; 10. Second motor; 11. Crushing shaft; 12. Crushing blade; 13. Support base; 14. Control panel; 15. Air blowing pipe; 16. Support frame; 17. Air distribution cylinder; 18. Air inlet pipe; 19. Air guide pipe; 20. Powder discharge pipe; 21. Grading structure. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Example:

[0024] Please see Figure 1-4A grinding mechanism for an air jet mill includes a grinding cylinder 1, with multiple crushing mechanisms 2 arranged on the side of the grinding cylinder 1, multiple air blowing pipes 15 fixedly connected to the side of the grinding cylinder 1, a conveying pipe 3 fixedly connected to the side of the grinding cylinder 1, a storage hopper 4 fixedly connected to the top of the conveying pipe 3, an arc-shaped mesh 5 fixedly sleeved on the top of the conveying pipe 3, a first motor 7 fixedly installed on the end face of the storage hopper 4, the output shaft of the first motor 7 extending into the inner cavity of the storage hopper 4 and fixedly connected to a spiral conveying rod 8 through a coupling, the end of the spiral conveying rod 8 extending through the inner cavity of the conveying pipe 3 into the inner cavity of the grinding cylinder 1, and a heating plate 6 fixedly sleeved on the bottom of the conveying pipe 3.

[0025] In this embodiment, the outer side of the spiral conveyor rod 8 is in contact with the inner wall of the conveying pipe 3 and the arc-shaped mesh 5, respectively, to ensure that the spiral conveyor rod 8 can drive the lithium iron phosphate material to move. At the same time, the spiral conveyor rod 8 is used to seal the inner cavity of the conveying pipe 3 and the arc-shaped mesh 5 to a certain extent, preventing the gas in the inner cavity of the crushing cylinder 1 from escaping from the arc-shaped mesh 5.

[0026] For details, please refer to Figure 1 and Figure 3 The crushing mechanism 2 includes a second motor 10 fixedly installed on the side of the crushing cylinder 1. The output shaft of the second motor 10 extends into the inner cavity of the crushing cylinder 1 and is fixedly connected to a crushing shaft 11 via a coupling. Multiple crushing blades 12 are fixedly connected to the side of the crushing shaft 11.

[0027] In this embodiment, the second motor 10 drives the crushing shaft 11 and the crushing blade 12 to rotate, and the crushing blade 12 is used to assist the gas in crushing the lithium iron phosphate.

[0028] For details, please refer to Figure 1 , Figure 3 and Figure 4 A support base 13 is fixedly connected to the bottom of the crushing cylinder 1, and a control panel 14 is fixedly connected to the side of the support base 13. The control panel 14 is electrically connected to the second motor 10, the first motor 7, and the heating plate 6 respectively.

[0029] In this embodiment, the crushing cylinder 1 is supported by the support base 13, the second motor 10, the first motor 7, and the heating plate 6 are controlled by the control panel 14, and the control panel 14, the second motor 10, the first motor 7, and the heating plate 6 are powered by the power supply of the external device.

[0030] For details, please refer to Figure 1 A support frame 16 is fixedly connected to the side of the support base 13. An air distribution cylinder 17 is provided on the top surface of the support frame 16. An air inlet pipe 18 is provided on the side of the air distribution cylinder 17. Multiple air guide pipes 19 are fixedly sleeved on the air distribution cylinder 17. The ends of the multiple air guide pipes 19 are connected to multiple blower pipes 15.

[0031] In this embodiment, high-speed gas from the outside enters the inner cavity of the gas distributor 17 through the air inlet pipe 18, and is guided into the crushing cylinder 1 through multiple air guide pipes 19 and multiple air blowing pipes 15, so as to drive the lithium iron phosphate in the crushing cylinder 1 to undergo collision crushing.

[0032] For details, please refer to Figure 1 The top of the storage hopper 4 is threaded with a threaded cover 9, the end of which extends into the inner cavity of the storage hopper 4.

[0033] In this embodiment, the lithium iron phosphate to be crushed is placed into the inner cavity of the storage hopper 4 by removing the threaded cap 9.

[0034] For details, please refer to Figure 1 and Figure 2 The top of the crushing cylinder 1 is provided with a grading structure 21, and the crushing cylinder 1 is provided with a powder discharge pipe 20, the end of the powder discharge pipe 20 being connected to the end of the grading structure 21.

[0035] In this embodiment, the processed powder is classified by the grading structure 21, and the qualified lithium iron phosphate powder is discharged through the powder discharge pipe 20.

[0036] Working principle: In use, first open the threaded cap 9 and place the lithium iron phosphate to be crushed into the inner cavity of the storage hopper 4. High-speed gas is then introduced from the inlet pipe 18 into the inner cavity of the gas distributor 17 via the external gas supply device. The high-speed gas in the gas distributor 17 is then introduced into the inner cavity of the crushing cylinder 1 through the air guide pipe 19 and the blower pipe 15. Then, the heating plate 6 is energized, causing the conveying pipe 3 to generate heat. Simultaneously, the first motor 7 is started, driving the screw conveyor 8 to rotate. The screw conveyor 8 then guides the lithium iron phosphate in the storage hopper 4 from the conveying pipe 3 into the inner cavity of the crushing cylinder 1. Simultaneously, the heat from the conveying pipe 3 heats and dries the lithium iron phosphate. The process involves drying the air so that the generated water vapor is released from the arc-shaped mesh 5 to the outside. Then, high-speed gas blown into the inner cavity of the crushing cylinder 1 by the blower pipe 15 moves the lithium iron phosphate and causes it to impact, thereby crushing the lithium iron phosphate. At the same time, multiple second motors 10 are activated to drive multiple crushing shafts 11 and multiple crushing blades 12 to rotate. The crushing blades 12 are used to crush the lithium iron phosphate to ensure the quality of the crushing. Finally, the crushed lithium iron phosphate powder is classified by the grading structure 21. The qualified lithium iron phosphate powder is discharged from the powder discharge pipe 20, while the unqualified lithium iron phosphate powder falls into the inner cavity of the crushing cylinder 1 for re-crushing.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A grinding mechanism of an air flow mill, comprising a grinding cylinder (1), characterized in that: The crushing cylinder (1) is provided with multiple crushing mechanisms (2) on its side. Multiple air blowers (15) are fixedly connected to the side of the crushing cylinder (1). A conveying pipe (3) is fixedly connected to the side of the crushing cylinder (1). A storage hopper (4) is fixedly connected to the top of the conveying pipe (3). An arc-shaped mesh (5) is fixedly sleeved on the top of the conveying pipe (3). A first motor (7) is fixedly installed on the end face of the storage hopper (4). The output shaft of the first motor (7) extends into the inner cavity of the storage hopper (4) and is fixedly connected to a spiral conveying rod (8) through a coupling. The end of the spiral conveying rod (8) extends through the inner cavity of the conveying pipe (3) into the inner cavity of the crushing cylinder (1). A heating plate (6) is fixedly sleeved on the bottom of the conveying pipe (3).

2. The milling mechanism of a jet mill according to claim 1, wherein: The crushing mechanism (2) includes a second motor (10) fixedly installed on the side of the crushing cylinder (1). The output shaft of the second motor (10) extends into the inner cavity of the crushing cylinder (1) and is fixedly connected to a crushing shaft (11) via a coupling. Multiple crushing blades (12) are fixedly connected to the side of the crushing shaft (11).

3. The milling mechanism of a jet mill according to claim 2, wherein: The bottom of the crushing cylinder (1) is fixedly connected to a support base (13), and the side of the support base (13) is fixedly connected to a control panel (14). The control panel (14) is electrically connected to the second motor (10), the first motor (7), and the heating plate (6).

4. The milling mechanism of a jet mill according to claim 3, wherein: A support frame (16) is fixedly connected to the side of the support base (13). A gas distribution cylinder (17) is provided on the top surface of the support frame (16). An air inlet pipe (18) is provided on the side of the gas distribution cylinder (17). Multiple air guide pipes (19) are fixedly sleeved on the gas distribution cylinder (17). The ends of the multiple air guide pipes (19) are connected to multiple blower pipes (15).

5. The milling mechanism of a jet mill according to claim 1, wherein: The top of the storage hopper (4) is threaded with a threaded cap (9), the end of which extends into the inner cavity of the storage hopper (4).

6. The milling mechanism of a jet mill according to claim 1, wherein: The top of the crushing cylinder (1) is provided with a grading structure (21), and a powder discharge pipe (20) is provided on the crushing cylinder (1). The end of the powder discharge pipe (20) is connected to the end of the grading structure (21).

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