Airflow mill device for metal powder preparation

Abstract

This utility model relates to the technical field of airflow milling devices and discloses an airflow milling device for metal powder preparation, which solves the problem of low grinding efficiency in existing airflow milling devices. It includes an airflow milling chamber, a feeding component fixedly installed at the middle of one side of the chamber, a high-pressure air supply pipe installed at the bottom of the chamber near the feeding component, a booster pump installed on the high-pressure air supply pipe, and a combined air supply mechanism connected to the high-pressure air supply pipe fixedly installed at the bottom of the outer surface of the chamber. The combined air supply mechanism consists of an annular air pipe, several air supply branch pipes, several horizontal air nozzles, and several inclined air nozzles. Several inverted V-shaped guide ribs are fixedly installed on the inner wall of the chamber, forming several return flow channels that match the horizontal air nozzles. This airflow milling device can effectively improve grinding efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of airflow milling equipment, specifically an airflow milling equipment for preparing metal powder. Background Technology

[0002] Metal powder preparation typically requires fine grinding using an airflow mill. Airflow mills utilize the impact force of high-pressure airflow to cause metal powders to collide and grind. Existing airflow mills usually only have horizontal nozzles, with multiple horizontal nozzles spraying air towards the center to form an upward airflow. The metal powder is then classified by a classifying impeller. Coarse-sized metal powders flow back along the inner wall of the chamber. Because there is usually a certain distance between adjacent nozzles, the flowing metal powder cannot fully move to the nozzle position, affecting grinding efficiency. Therefore, this application proposes an airflow mill for metal powder preparation. Utility Model Content

[0003] In view of the above situation and to overcome the defects of the prior art, this utility model provides an air jet milling device for metal powder preparation, which effectively solves the problem of low grinding efficiency of existing air jet milling devices.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an airflow milling device for preparing metal powder, comprising an airflow milling chamber, a feeding component fixedly disposed at the middle position of one side of the airflow milling chamber, a high-pressure air supply pipe disposed at the bottom end of the side of the airflow milling chamber near the feeding component, a booster pump disposed on the high-pressure air supply pipe, and a combined air supply mechanism connected to the high-pressure air supply pipe fixedly disposed at the bottom end of the outer surface of the airflow milling chamber.

[0005] The combined air supply mechanism consists of an annular air pipe, several air supply branch pipes, several horizontal jet nozzles and several inclined jet nozzles. The annular air pipe is connected to the high-pressure air supply pipe. The horizontal jet nozzles and inclined jet nozzles are both connected to the bottom end of the side of the airflow mill chamber. The horizontal jet nozzles and inclined jet nozzles are both connected to the annular air pipe through the air supply branch pipes.

[0006] The inner wall of the airflow mill chamber is fixedly provided with several inverted V-shaped guide ribs, and the inverted V-shaped guide ribs and the inner wall of the airflow mill chamber form several return material guide channels that match the horizontal jet nozzles.

[0007] Preferably, the horizontal jet nozzle and the inclined jet nozzle are arranged alternately, and the jet direction of the inclined jet nozzle is at an angle of 45 degrees to the central axis of the airflow mill chamber.

[0008] Preferably, a triangular guide plate one and a triangular guide plate two are fixedly installed on both sides of the top of the horizontal jet nozzle. One side of each of the triangular guide plate one and the triangular guide plate two is fixedly connected to the inner wall of the airflow grinding chamber, and a confluence channel is formed between the triangular guide plate one and the triangular guide plate two, the airflow grinding chamber, and the horizontal jet nozzle.

[0009] Preferably, a pressure gauge is installed on the annular air tube.

[0010] Preferably, the feeding assembly consists of a support frame, a screw feeder, and a hopper. The hopper is fixedly connected to the support frame, the screw feeder is fixedly connected to the bottom of the hopper, and one end of the screw feeder is connected to the airflow mill chamber.

[0011] Preferably, a servo motor is fixedly installed at the top of one side of the airflow mill chamber, a classifying impeller fixedly connected to the output shaft of the servo motor is rotatably installed at the top inside the airflow mill chamber, and a discharge pipe is fixedly installed at the top of the other side of the airflow mill chamber.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] (1) In operation, by setting up a high-pressure air supply pipe, a booster pump, and a combined air supply mechanism consisting of a ring air pipe, several air supply branch pipes, several horizontal jet nozzles and several inclined jet nozzles, high-pressure airflow can be used to achieve grinding work. Through the combined design of horizontal jet nozzles and inclined jet nozzles, two grinding operations can be achieved in one grinding process, effectively improving grinding efficiency.

[0014] (2) By setting up inverted V-shaped guide ribs and return material guide channels, the metal powder with unqualified particle size after classification can be guided, so that the metal powder can move directly to the position of the horizontal jet nozzle, so that the metal powder can be directly impacted by the airflow and participate in the grinding work, thereby improving the grinding efficiency. By setting up triangular guide plate one, triangular guide plate two and converging channel, the metal powder can be further collected.

[0015] (3) By setting up a feeding assembly consisting of a support frame, a screw feeder and a hopper, it is possible to feed metal powder quantitatively and continuously. Attached Figure Description

[0016] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0017] In the attached diagram:

[0018] Figure 1 This is a schematic diagram of the airflow milling device for preparing metal powder according to this utility model;

[0019] Figure 2 This is a partial structural schematic diagram of the airflow milling device for preparing metal powder according to this utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the airflow mill chamber of this utility model;

[0021] Figure 4 This utility model Figure 3 A magnified view of a section at point A in the middle;

[0022] In the diagram: 1. Airflow mill hopper; 2. Feeding assembly; 3. High-pressure air supply pipe; 4. Booster pump; 5. Combined air supply mechanism; 6. Annular air pipe; 7. Air supply branch pipe; 8. Horizontal air nozzle; 9. Inclined air nozzle; 10. Inverted V-shaped guide ribs; 11. Return material guide channel; 12. Triangular guide plate one; 13. Triangular guide plate two; 14. Converging channel; 15. Pressure gauge; 16. Support frame; 17. Screw feeder; 18. Hopper; 19. Servo motor; 20. Classifying impeller; 21. Discharge pipe. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and 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 protection scope of the present utility model.

[0024] Depend on Figures 1 to 4 The present invention provides an airflow milling device for preparing metal powder, comprising an airflow milling chamber 1, a feeding component 2 fixedly disposed at the middle position of one side of the airflow milling chamber 1, a high-pressure air supply pipe 3 disposed at the bottom end of the side of the airflow milling chamber 1 near the feeding component 2, a booster pump 4 disposed on the high-pressure air supply pipe 3, and a combined air supply mechanism 5 connected to the high-pressure air supply pipe 3 fixedly disposed at the bottom end of the outer surface of the airflow milling chamber 1.

[0025] The feeding component 2 feeds metal powder into the airflow mill chamber 1 for fine grinding. The high-pressure air supply pipe 3 and the booster pump 4 supply high-pressure gas to the combined air supply mechanism 5, and the grinding operation is achieved through the high-pressure gas.

[0026] The combined air supply mechanism 5 consists of an annular air pipe 6, several air supply branch pipes 7, several horizontal jet nozzles 8 and several inclined jet nozzles 9. The annular air pipe 6 is connected to the high-pressure air supply pipe 3. The horizontal jet nozzles 8 and inclined jet nozzles 9 are both connected to the bottom end of the side of the airflow mill chamber 1. The horizontal jet nozzles 8 and inclined jet nozzles 9 are both connected to the annular air pipe 6 through the air supply branch pipes 7.

[0027] High-pressure gas enters the interior of horizontal jet nozzle 8 and inclined jet nozzle 9 through annular gas pipe 6 and gas supply branch pipe 7. First, it is impacted by the jet of horizontal jet nozzle 8, and the metal powder collides with each other to achieve grinding. An upward airflow is formed along the central axis of airflow grinding chamber 1. The upward airflow carries the metal powder upward. During the upward movement, the metal powder is impacted by the jet of inclined jet nozzle 9 to achieve secondary impact grinding, thereby improving grinding efficiency. The metal powder after secondary grinding continues to rise. After classification, the coarse-diameter powder moves downward along the inner wall of airflow grinding chamber 1.

[0028] The inner wall of the airflow mill chamber 1 is fixedly provided with several inverted V-shaped guide ribs 10, and the inverted V-shaped guide ribs 10 and the inner wall of the airflow mill chamber 1 form several return material guide channels 11 that match the horizontal jet nozzles 8.

[0029] During the downward movement, the metal powder is guided by the inverted V-shaped guide ribs 10, and then moves down along the return material guide channel 11 to the position of the horizontal jet nozzle 8, so that the metal powder can directly contact the high-pressure airflow and participate in secondary grinding, thereby further improving the grinding efficiency.

[0030] The horizontal jet nozzle 8 and the inclined jet nozzle 9 are arranged alternately. The jet direction of the inclined jet nozzle 9 is at an angle of 45 degrees to the central axis of the airflow grinding chamber 1, which can form an upward inclined airflow to achieve secondary impact on the metal powder.

[0031] Triangular guide plate 12 and triangular guide plate 23 are fixedly installed on both sides of the top of the horizontal jet nozzle 8. One side of triangular guide plate 12 and triangular guide plate 23 are fixedly connected to the inner side wall of the airflow grinding chamber 1. Triangular guide plate 12 and triangular guide plate 23 form a confluence channel 14 between airflow grinding chamber 1 and horizontal jet nozzle 8.

[0032] Metal powder can be moved more precisely to the position of the horizontal jet nozzle 8 through the confluence channel 14, thus improving the grinding effect;

[0033] A pressure gauge 15 is installed on the annular air tube 6 to monitor the air pressure;

[0034] The feeding assembly 2 consists of a support frame 16, a screw feeder 17 and a hopper 18. The hopper 18 is fixedly connected to the support frame 16, and the screw feeder 17 is fixedly connected to the bottom end of the hopper 18. One end of the screw feeder 17 is connected to the airflow mill chamber 1.

[0035] Metal powder is fed into the hopper 18 and fed uniformly, quantitatively and continuously by the screw feeder 17.

[0036] A servo motor 19 is fixedly installed at the top of one side of the airflow mill chamber 1. A classifying impeller 20, which is fixedly connected to the output shaft of the servo motor 19, is rotatably installed at the top inside the airflow mill chamber 1. A discharge pipe 21 is fixedly installed at the top of the other side of the airflow mill chamber 1.

[0037] Servo motor 19 drives classifying impeller 20 to rotate, classifying metal powder through classifying impeller 20. Metal powder with qualified particle size is discharged through discharge pipe 21, while metal powder with unqualified particle size is returned to the airflow mill chamber 1 by centrifugal force of classifying impeller 20 for secondary grinding.

[0038] In operation, the system is equipped with a high-pressure air supply pipe, a booster pump, and a combined air supply mechanism consisting of a ring-shaped air pipe, several air supply branch pipes, several horizontal jet nozzles, and several inclined jet nozzles. This allows for grinding using high-pressure airflow. The combined design of the horizontal and inclined jet nozzles enables two grinding operations within a single grinding process, effectively improving grinding efficiency. The inverted V-shaped guide ribs and return flow channel guide the flow of metal powder that does not meet the particle size requirements after classification, allowing it to move directly to the horizontal jet nozzles. This ensures the metal powder is directly impacted by the airflow and participates in the grinding process, further enhancing grinding efficiency. The triangular guide plate I, triangular guide plate II, and converging channel further collect the metal powder. Finally, the feeding assembly, consisting of a support frame, a screw feeder, and a hopper, enables quantitative and continuous feeding of the metal powder.

Claims

1. An air jet milling apparatus for preparing metal powder, comprising an air jet milling chamber (1), characterized in that: A feeding assembly (2) is fixedly installed in the middle of one side of the airflow milling chamber (1). A high-pressure air supply pipe (3) is installed at the bottom of the side of the airflow milling chamber (1) near the feeding assembly (2). A booster pump (4) is installed on the high-pressure air supply pipe (3). A combined air supply mechanism (5) connected to the high-pressure air supply pipe (3) is fixedly installed at the bottom of the outer surface of the airflow milling chamber (1). The combined air supply mechanism (5) consists of an annular air pipe (6), several air supply branch pipes (7), several horizontal jet nozzles (8) and several inclined jet nozzles (9). The annular air pipe (6) is connected to the high-pressure air supply pipe (3). The horizontal jet nozzles (8) and the inclined jet nozzles (9) are both connected to the bottom end of the side of the airflow grinding chamber (1). The horizontal jet nozzles (8) and the inclined jet nozzles (9) are both connected to the annular air pipe (6) through the air supply branch pipes (7). The inner wall of the airflow mill chamber (1) is fixedly provided with several inverted V-shaped guide ribs (10), and the inverted V-shaped guide ribs (10) and the inner wall of the airflow mill chamber (1) form several return flow channels (11) that match the horizontal jet nozzles (8).

2. The air jet mill apparatus for preparing metal powder according to claim 1, characterized in that: The horizontal jet nozzle (8) and the inclined jet nozzle (9) are arranged at intervals, and the jet direction of the inclined jet nozzle (9) is at an angle of 45 degrees with the central axis of the airflow grinding chamber (1).

3. The air jet mill apparatus for preparing metal powder according to claim 1, characterized in that: Triangular guide plate one (12) and triangular guide plate two (13) are fixedly installed on both sides of the top of the horizontal jet nozzle (8). One side of triangular guide plate one (12) and triangular guide plate two (13) are fixedly connected to the inner wall of the airflow grinding chamber (1). Triangular guide plate one (12) and triangular guide plate two (13) form a confluence channel (14) between the airflow grinding chamber (1) and the horizontal jet nozzle (8).

4. The air jet mill apparatus for preparing metal powder according to claim 1, characterized in that: A pressure gauge (15) is installed on the annular air pipe (6).

5. The air jet mill apparatus for preparing metal powder according to claim 1, characterized in that: The feeding assembly (2) consists of a support frame (16), a screw feeder (17) and a hopper (18). The hopper (18) is fixedly connected to the support frame (16), and the screw feeder (17) is fixedly connected to the bottom of the hopper (18). One end of the screw feeder (17) is connected to the airflow mill chamber (1).

6. The air jet mill apparatus for preparing metal powder according to claim 1, characterized in that: A servo motor (19) is fixedly installed at the top of one side of the airflow milling chamber (1), and a classifying impeller (20) fixedly connected to the output shaft of the servo motor (19) is rotatably installed at the top inside the airflow milling chamber (1). A discharge pipe (21) is fixedly installed at the top of the other side of the airflow milling chamber (1).

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