Water atomization device for producing microcrystalline copper alloy powder through rapid condensation

Abstract

The invention relates to a water atomization device for producing microcrystalline copper alloy powder through rapid condensation, which comprises an atomization cylinder, a vertical crucible liquid guide pipe is arranged at the center of the top of the atomization cylinder, an annular atomizer is fixedly connected to the outer surface of the top of the atomization cylinder, and a plurality of inclined high-pressure atomization nozzles are arranged on the atomizer. The middle part and the upper part of the atomizing cylinder are provided with horizontally arranged rotating centrifugal discs, the rotating centrifugal discs are positioned under the crucible liquid guide pipe, the lower parts of the rotating centrifugal discs are connected with a motor, the motor drives the rotating centrifugal discs to rotate in the atomizing cylinder, and the rotating speed of the rotating centrifugal discs is 4800-5000r / min; a cooling water pipe opposite to the rotary centrifugal disc is arranged on the atomizing cylinder, and the cooling water pipe conveys cooling water to the upper surface of the rotary centrifugal disc; the outer wall of the rotary centrifugal disc is fixedly connected with a spoke rod, and the outer end of the spoke rod is fixedly connected to the outer baffle ring. According to the water atomization device, high-pressure atomization cooling and centrifugal secondary cooling are combined, and spherical metal powder of a microcrystal structure can be manufactured in a water atomization mode.

Description

Technical Field

[0001] This invention relates to the technical field of water atomization equipment, and more specifically to a water atomization device for rapidly condensing and producing microcrystalline copper alloy powder. Background Technology

[0002] Copper alloy powder is one of the basic raw materials in the powder metallurgy industry. It has promising applications in industrial production, particularly in powder metallurgy, manufacturing mechanical parts, producing friction materials, anti-friction materials, superhard materials, magnetic materials, lubricants and their products, chemicals, cutting, heating materials, and welding electrodes. Currently, copper alloy powder can be manufactured using water atomization. This process involves melting copper alloys, introducing the molten metal into an atomizing cylinder, and then impacting the molten metal flow with high-pressure water (15-25 MPa) to break it into powder. However, conventional atomization methods have several drawbacks. Firstly, the high water flow rate results in a high water pressure impact, easily forming microcrystalline (micron-sized grains) powder, but with irregular shapes. Secondly, when the water flow rate is low, the water pressure impact is low, and the molten metal easily forms spherical shapes, but the grains are relatively large, failing to achieve a microcrystalline structure and resulting in high oxygen content. Therefore, a water atomization device is needed that can achieve both a microcrystalline structure and spherical shape in the metal powder. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a water atomization device for the rapid condensation and production of microcrystalline copper alloy powder. This water atomization device combines high-pressure atomization cooling and centrifugal secondary cooling to achieve the production of microcrystalline spherical metal powder through water atomization.

[0004] A water atomization device for rapid condensation production of microcrystalline copper alloy powder includes an atomizing cylinder. A vertical crucible liquid guide tube is set at the center of the top of the atomizing cylinder. An annular atomizer 3 is sleeved on the crucible liquid guide tube 2. The atomizer 3 is fixed on the outer surface of the top of the atomizing cylinder 1. The atomizer is provided with several obliquely placed and annularly distributed high-pressure atomizing nozzles. A horizontally arranged rotating centrifugal disc is provided in the middle and upper part of the atomizing cylinder. The rotating centrifugal disc is located directly below the crucible liquid guide tube. A motor is connected to the lower part of the rotating centrifugal disc. The motor drives the rotating centrifugal disc to rotate inside the atomizing cylinder. The rotation speed of the rotating centrifugal disc is 4800-5000 r / min.

[0005] The atomizing cylinder is equipped with a cooling water pipe opposite to the rotating centrifugal disc, and the cooling water pipe delivers cooling water to the upper surface of the rotating centrifugal disc; a number of annularly distributed spokes are fixedly connected to the outer wall of the rotating centrifugal disc, and the outer ends of the spokes are fixedly connected to an outer retaining ring with an arc-shaped cross section.

[0006] Preferably, the central axis of the rotating centrifuge disc, the central axis of the crucible liquid guide tube, the central axis of the outer retaining ring, and the central axis of the atomizing cylinder are coincident, and the spokes are round rods, which are evenly distributed in a ring around the central axis of the rotating centrifuge disc;

[0007] The high-pressure atomizing nozzle on the atomizer sprays high-pressure water mist, and the crucible liquid guide tube flows out of the molten metal. The confluence of the high-pressure water mist is located directly below the crucible liquid guide tube and is in contact with the molten metal.

[0008] Preferably, a conical protective guide shroud is inserted into the atomizing cylinder directly above the rotating centrifugal disc, and the protective guide shroud is located below the confluence of high-pressure water mist a; a conical support disc is inserted into the atomizing cylinder directly below the rotating centrifugal disc, and a vertical support tube is formed in the middle of the support disc. The upper end of the support tube passes through the rotating centrifugal disc and is fixedly connected to several annularly distributed diagonal braces, and the outer ends of the diagonal braces are fixed to the protective guide shroud; the rotating centrifugal disc is connected to the support tube through bearings;

[0009] The cooling water pipe is inserted and fixed inside the support pipe. The upper end of the cooling water pipe extends out of the support pipe toward the inner wall of the protective guide cover, and the lower end passes through the support plate and is fixedly connected to the water supply pipe. The water supply pipe is inserted and fixed on the atomizing cylinder. A cooling water source is provided on the outside of the atomizing cylinder, and the water supply pipe is connected to the cooling water source.

[0010] The motor is located on the outside of the atomizing cylinder. A horizontal first drive shaft is fixedly connected to the motor's rotating shaft. The first drive shaft passes through the cylinder wall of the atomizing cylinder and is fixedly connected to a drive bevel gear. A driven bevel gear meshes with the drive bevel gear. A vertical second drive shaft is fixedly inserted into the driven bevel gear. A horizontal drive gear is fixedly connected to the upper end of the second drive shaft. A driven gear meshes with the drive gear. A connecting bushing is formed in the middle of the lower end face of the rotating centrifugal disc. The connecting bushing is sleeved on the support tube. The driven gear is fixedly inserted on the connecting bushing. Both the drive gear and the driven gear are located directly below the rotating centrifugal disc.

[0011] A circular positioning boss is formed on the upper surface of the support plate. A cylindrical protective isolation cover is inserted into the positioning boss. The upper end of the protective isolation cover is fitted on the outside of the driving gear and the driven gear and is close to the lower end of the rotating centrifugal disk. A ring-shaped connecting plate is inserted and fixed inside the protective isolation cover. The second transmission shaft is connected to the connecting plate through a bearing. Several ring-shaped connecting columns are fixed on the lower end of the connecting plate. The lower ends of the connecting columns are fixed to the support plate.

[0012] The protective isolation cover is fixed with several ring-shaped support tubes, the outer end of which is fixed to the inner wall of the atomizing cylinder. The first drive shaft is connected to the support tubes through bearings. An inclined support rod is fixed to the lower tube wall of the support tube, and the lower end of the support rod is fixed to the outer wall of the support plate.

[0013] Preferably, both the protective isolation cover and the atomizing cylinder are provided with through holes opposite to the first drive shaft. The diameter of the through holes in both the protective isolation cover and the atomizing cylinder is larger than the diameter of the first drive shaft and smaller than the inner diameter of the support tube.

[0014] Preferably, the rotating centrifugal disc is provided with two sets of bearings. The bearing in the lower part of the rotating centrifugal disc extends out of the lower end face of the connecting sleeve and abuts against a cylindrical support. The support is sleeved on the support tube and fixed to the connecting disc.

[0015] Preferably, the outer diameter of the lower end of the protective flow guide is smaller than the diameter of the outer ring of the rotating centrifugal disk, and a cylindrical flow-limiting sleeve is fixed inside the protective flow guide, with the diagonal brace fixed to the inner wall of the flow-limiting sleeve; the outer wall of the flow-limiting sleeve and the outer ring of the lower end of the protective flow guide are in the same cylindrical surface.

[0016] Preferably, the center of the arc of the outer retaining ring cross section is located between the upper and lower rings of the outer retaining ring;

[0017] The lower part of the outer retaining ring is fitted with a circular support ring, on which several annularly distributed balls are embedded, and the balls abut against the outer wall of the outer retaining ring; several annularly distributed connecting rods are fixedly connected to the support ring, and the outer ends of the connecting rods are fixedly connected to the inner wall of the atomizing cylinder.

[0018] The beneficial effects of this invention are as follows:

[0019] This water atomization device combines high-pressure atomization cooling and centrifugal secondary cooling to enable the production of microcrystalline spherical metal powders using water atomization. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 for Figure 1 A magnified schematic diagram of the structure at point A in the middle.

[0022] In the diagram: 1. Atomizing cylinder; 2. Crucible liquid guide tube; 3. Atomizer; 4. Rotating centrifugal disc; 41. Connecting sleeve; 5. Cooling water pipe; 6. Outer retaining ring; 7. Spoke rod; 8. Support plate; 81. Support pipe; 82. Positioning boss; 9. Protective guide shroud; 10. Flow limiting sleeve; 11. Diagonal brace; 12. Driven gear; 13. Driven gear; 14. Second drive shaft; 15. Driven bevel gear; 16. Driven bevel gear; 17. First drive shaft; 18. Support plate; 19. Protective isolation cover; 20. Support rod; 21. Connecting plate; 22. Connecting column; 23. Support; 24. Water supply pipe; 25. Support ring; 26. Connecting rod. Detailed Implementation

[0023] Example: See Figure 1As shown, a water atomization device for rapid condensation production of microcrystalline copper alloy powder includes an atomizing cylinder 1. A vertical crucible liquid guide pipe 2 is set at the center of the top of the atomizing cylinder 1. An annular atomizer 3 is sleeved on the crucible liquid guide pipe 2. The atomizer 3 is fixed on the outer surface of the top of the atomizing cylinder 1. The atomizer 3 is provided with a flange structure, and bolts are inserted into the flange to achieve a fixed connection of the atomizer 3. The atomizer 3 is provided with several obliquely placed and annularly distributed high-pressure atomizing nozzles. A horizontally arranged rotating centrifugal disk 4 is provided in the middle and upper part of the atomizing cylinder 1. The rotating centrifugal disk 4 is located directly below the crucible liquid guide pipe 2. A motor is connected to the lower part of the rotating centrifugal disk 4. The motor drives the rotating centrifugal disk 4 to rotate inside the atomizing cylinder 1. The rotation speed of the rotating centrifugal disk 4 is 4800~5000 r / min.

[0024] The atomizing cylinder 1 is provided with a cooling water pipe 5 opposite to the rotating centrifugal disc 4. The cooling water pipe 5 delivers cooling water c to the upper surface of the rotating centrifugal disc 4. Several annularly distributed spokes 7 are fixedly connected to the outer wall of the rotating centrifugal disc 4. The outer ends of the spokes 7 are fixedly connected to an outer retaining ring 6 with an arc-shaped cross section.

[0025] The central axis of the rotating centrifugal disk 4, the central axis of the crucible liquid guide tube 2, the central axis of the outer baffle ring 6 and the central axis of the atomizing cylinder 1 are coincident. The spokes 7 are round rods and are evenly distributed in a ring around the central axis of the rotating centrifugal disk 4.

[0026] The high-pressure atomizing nozzle on the atomizer 3 sprays out high-pressure water mist a, and the crucible liquid guide tube 2 flows out molten metal b. The confluence of the high-pressure water mist a is located directly below the crucible liquid guide tube 2 and is in contact with the molten metal b.

[0027] See Figure 2 As shown, a conical protective guide shroud 9 is inserted into the atomizing cylinder 1 directly above the rotating centrifugal disc 4, and the protective guide shroud 9 is located below the confluence of high-pressure water mist a; a conical support disc 8 is inserted into the atomizing cylinder 1 directly below the rotating centrifugal disc 4, and a vertical support tube 81 is formed in the middle of the support disc 8. The upper end of the support tube 81 passes through the rotating centrifugal disc 4 and is fixedly connected to several annularly distributed diagonal braces 11, and the outer ends of the diagonal braces 11 are fixed to the protective guide shroud 9; the rotating centrifugal disc 4 is connected to the support tube through bearings. 81; Here, the cooling water pipe 5 is set up with the structure of a fountain pipe. The cooling water transported by the cooling water pipe 5 first impacts the protective guide shroud 9 and is dispersed by hitting the inner wall of the protective guide shroud 9. The dispersed cooling water falls onto the rotating centrifugal disc 4, and the metal liquid that has been initially atomized by the atomizer 3 becomes metal droplets. The metal droplets fall onto the rotating centrifugal disc 4 and are dispersed, refined and cooled by the force of the rotating centrifugal disc 4 and the cooling water c. At the same time, they will roll and spherize on the rotating centrifugal disc 4, becoming spherical metal powder.

[0028] The cooling water pipe 5 is inserted and fixed inside the support pipe 81. The upper end of the cooling water pipe 5 extends out of the support pipe 81 toward the inner wall of the protective guide shroud 9, and the lower end passes through the support plate 8 and is fixedly connected to the water supply pipe 24. The water supply pipe 24 is inserted and fixed on the atomizing cylinder 1. A cooling water source is provided on the outside of the atomizing cylinder 1, and the water supply pipe 24 is connected to the cooling water source.

[0029] The motor is located on the outside of the atomizing cylinder 1. A horizontal first drive shaft 17 is fixedly connected to the motor's shaft. The first drive shaft 17 passes through the cylinder wall of the atomizing cylinder 1 and is fixedly connected to a drive bevel gear 16. A driven bevel gear 15 meshes with the drive bevel gear 16. A vertical second drive shaft 14 is inserted and fixed inside the driven bevel gear 15. A horizontal drive gear 13 is fixedly connected to the upper end of the second drive shaft 14. A driven gear 12 meshes with the drive gear 13. A connecting sleeve 41 is formed in the middle of the lower end face of the rotating centrifugal disk 4. The connecting sleeve 41 is sleeved on the support tube 81. The driven gear 12 is fixedly inserted on the connecting sleeve 41. Both the drive gear 13 and the driven gear 12 are located directly below the rotating centrifugal disk 4. Compared with the high temperature environment inside the atomizing cylinder 1, it is safer to place the motor on the outside of the atomizing cylinder 1.

[0030] A circular positioning boss 82 is formed on the upper surface of the support disk 8. A cylindrical protective isolation cover 19 is inserted and sleeved on the positioning boss 82. The upper end of the protective isolation cover 19 is sleeved on the outside of the driving gear 13 and the driven gear 12 and is close to the lower end of the rotating centrifugal disk 4. A circular connecting disk 21 is inserted and fixed inside the protective isolation cover 19. The second transmission shaft 14 is connected to the connecting disk 21 through a bearing. Several ring-shaped connecting posts 22 are fixedly connected to the lower end of the connecting disk 21. The lower ends of the connecting posts 22 are fixedly connected to the support disk 8. The protective isolation cover 19 can prevent metal powder from entering the lower part of the rotating centrifugal disk 4 and causing transmission failure.

[0031] The protective isolation cover 19 is fixedly connected to several ring-shaped support tubes 18. The outer end of the support tube 18 is fixedly connected to the inner wall of the atomizing cylinder 1. The first drive shaft 17 is connected to the support tube 18 through a bearing. An inclined support rod 20 is fixedly connected to the lower tube wall of the support tube 18. The lower end of the support rod 20 is fixedly connected to the outer wall of the support plate 8.

[0032] Both the protective isolation cover 19 and the atomizing cylinder 1 are provided with through holes opposite to the first drive shaft 17. The diameter of the through holes of the protective isolation cover 19 and the atomizing cylinder 1 is larger than the diameter of the first drive shaft 17 and smaller than the inner diameter of the support tube 18. The first drive shaft 17 needs to rotate at a high speed and does not come into contact with the protective isolation cover 19 and the atomizing cylinder 1.

[0033] The rotating centrifugal disc 4 is equipped with two sets of bearings. The bearing in the lower part of the rotating centrifugal disc 4 extends out of the lower end face of the connecting sleeve 41 and abuts against the cylindrical support 23. The support 23 is sleeved on the support tube 81 and fixed to the connecting disc 21. Its bearing includes an inner ring and an outer ring. The inner ring of the bearing is in contact with the support 23. The support 23 can effectively support the rotating centrifugal disc 4.

[0034] The outer diameter of the lower end of the protective guide shroud 9 is smaller than the outer diameter of the rotating centrifugal disk 4, so that the metal droplets can fall onto the rotating centrifugal disk 4. A cylindrical flow-limiting sleeve 10 is fixed inside the protective guide shroud 9, and the diagonal support rod 11 is fixed to the inner wall of the flow-limiting sleeve 10. The outer wall of the flow-limiting sleeve 10 and the outer ring of the lower end of the protective guide shroud 9 are in the same cylindrical surface. The flow-limiting sleeve 10 can prevent the cooling water c output from the cooling water pipe 5 from falling onto the outside of the rotating centrifugal disk 4.

[0035] The center of the arc of the outer baffle ring 6 is located between the upper and lower rings of the outer baffle ring 6. When the cooling water c falls onto the rotating centrifugal disk 4, it is thrown onto the outer baffle ring 6. It can flow along the inner wall of the outer baffle ring 6 and be thrown towards the middle of the outer baffle ring 6 by the centrifugal force of the outer baffle ring 6, so as to contact the mixture of atomized water and metal powder and make it fall onto the rotating centrifugal disk 4, thus avoiding the mixture of atomized water and metal powder falling directly onto the outside of the rotating centrifugal disk 4.

[0036] The lower part of the outer retaining ring 6 is fitted with a circular ring support ring 25, and a number of circularly distributed balls are embedded on the support ring 25. The balls abut against the outer wall of the outer retaining ring 6. A number of circularly distributed connecting rods 26 are fixedly connected to the support ring 25, and the outer ends of the connecting rods 26 are fixedly connected to the inner wall of the atomizing cylinder 1.

[0037] Working Principle: This structure is a water atomization device for rapid condensation production of microcrystalline copper alloy powder. The molten copper alloy is fed into the atomizing cylinder 1 through the crucible guide pipe 2. The upper part of the atomizing cylinder 1 uses a small-flow-rate water atomization method to first convert the molten metal into small metal droplets. These droplets move towards the rotating centrifugal disk 4 under the influence of weight and the atomizing water. Simultaneously, cooling water c falls onto the rotating centrifugal disk 4. The cooling water c disperses and is thrown out on the rapidly rotating centrifugal disk 4, impacting the metal droplets and achieving droplet refinement (equivalent to secondary atomizing water impact). Then, the cooling water c and the refined metal droplets fall together onto the rotating centrifugal disk 4. The refined metal droplets roll on the rotating centrifugal disk 4, changing from an irregular shape to a regular spherical microcrystalline structure (achieving rapid condensation). Finally, they fall along the outer side of the rotating centrifugal disk 4, i.e., between the spokes 7. Figure 1 As shown, the liquid metal, after secondary cooling and centrifugation by the rotating centrifugal disc 4, becomes spherical microcrystalline powder with a relatively stable shape, and it is not easily deformed when output from the bottom of the atomizing cylinder 1.

[0038] The embodiments described are illustrative of the invention and are not intended to limit the invention. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the invention; therefore, the scope of protection of the invention should be as set forth in the claims.

Claims

1. A water atomization device for rapid condensation production of microcrystalline copper alloy powder, comprising an atomizing cylinder (1), a vertical crucible liquid guide pipe (2) disposed at the center of the top of the atomizing cylinder (1), an annular atomizer (3) sleeved on the crucible liquid guide pipe (2), the atomizer (3) being fixed on the outer surface of the top of the atomizing cylinder (1), and the atomizer (3) being provided with a plurality of obliquely placed and annularly distributed high-pressure atomizing nozzles, characterized in that: The middle and upper parts of the atomizing cylinder (1) are provided with a horizontally arranged rotating centrifugal disc (4). The rotating centrifugal disc (4) is located directly below the crucible liquid guide pipe (2). The lower part of the rotating centrifugal disc (4) is connected to a motor. The motor drives the rotating centrifugal disc (4) to rotate inside the atomizing cylinder (1). The rotation speed of the rotating centrifugal disc (4) is 4800~5000r / min. The atomizing cylinder (1) is provided with a cooling water pipe (5) opposite to the rotating centrifugal disc (4). The cooling water pipe (5) delivers cooling water (c) to the upper surface of the rotating centrifugal disc (4). The outer wall of the rotating centrifugal disc (4) is fixedly connected with several annularly distributed spokes (7). The outer ends of the spokes (7) are fixedly connected to an outer retaining ring (6) with a circular arc cross-section.

2. The water atomization device for rapid condensation production of microcrystalline copper alloy powder according to claim 1, characterized in that: The central axis of the rotating centrifugal disc (4), the central axis of the crucible liquid guide tube (2), the central axis of the outer retaining ring (6) and the central axis of the atomizing cylinder (1) are coincident. The spokes (7) are round rods and are evenly distributed in a ring around the central axis of the rotating centrifugal disc (4). The high-pressure atomizing nozzle on the atomizer (3) sprays out high-pressure water mist (a), and the crucible liquid guide tube (2) flows out molten metal (b). The confluence of the high-pressure water mist (a) is located directly below the crucible liquid guide tube (2) and is in contact with the molten metal (b).

3. The water atomization device for rapid condensation production of microcrystalline copper alloy powder according to claim 2, characterized in that: A conical protective guide shroud (9) is inserted into the atomizing cylinder (1) directly above the rotating centrifugal disc (4). The protective guide shroud (9) is located below the confluence of high-pressure water mist (a). A conical support disc (8) is inserted into the atomizing cylinder (1) directly below the rotating centrifugal disc (4). A vertical support tube (81) is formed in the middle of the support disc (8). The upper end of the support tube (81) passes through the rotating centrifugal disc (4) and is fixedly connected to several ring-shaped diagonal braces (11). The outer end of the diagonal braces (11) is fixed to the protective guide shroud (9). The rotating centrifugal disc (4) is connected to the support tube (81) through a bearing. The cooling water pipe (5) is inserted and fixed inside the support pipe (81). The upper end of the cooling water pipe (5) extends out of the support pipe (81) toward the inner wall of the protective guide shroud (9), and the lower end passes through the support plate (8) and is fixedly connected to the water supply pipe (24). The water supply pipe (24) is inserted and fixed on the atomizing cylinder (1). A cooling water source is provided on the outside of the atomizing cylinder (1), and the water supply pipe (24) is connected to the cooling water source. The motor is located on the outside of the atomizing cylinder (1). A horizontal first transmission shaft (17) is fixedly connected to the rotating shaft of the motor. The first transmission shaft (17) passes through the cylinder wall of the atomizing cylinder (1) and is fixedly connected to the active bevel gear (16). A driven bevel gear (15) meshes with the active bevel gear (16). A vertical second transmission shaft (14) is inserted and fixed inside the driven bevel gear (15). A horizontal active gear (13) is fixedly connected to the upper end of the second transmission shaft (14). A driven gear (12) meshes with the active gear (13). A connecting bushing (41) is formed in the middle of the lower end face of the rotating centrifugal disk (4). The connecting bushing (41) is sleeved on the support tube (81). The driven gear (12) is fixedly inserted on the connecting bushing (41). The active gear (13) and the driven gear (12) are both located directly below the rotating centrifugal disk (4). A circular positioning boss (82) is formed on the upper surface of the support plate (8). A cylindrical protective shield (19) is inserted into the positioning boss (82). The upper end of the protective shield (19) is fitted on the outside of the driving gear (13) and the driven gear (12) and is close to the lower end of the rotating centrifugal disk (4). A circular connecting plate (21) is inserted and fixed inside the protective shield (19). The second transmission shaft (14) is connected to the connecting plate (21) through a bearing. Several ring-shaped connecting columns (22) are fixed on the lower end of the connecting plate (21). The lower end of the connecting column (22) is fixed on the support plate (8). The protective isolation cover (19) is fixed with several ring-shaped support tubes (18), the outer end of the support tubes (18) is fixed to the inner wall of the atomizing cylinder (1), and the first drive shaft (17) is connected to the support tubes (18) through bearings; the lower tube wall of the support tubes (18) is fixed with an inclined support rod (20), and the lower end of the support rod (20) is fixed to the outer wall of the support plate (8).

4. The water atomization device for rapid condensation production of microcrystalline copper alloy powder according to claim 3, characterized in that: Both the protective isolation cover (19) and the atomizing cylinder (1) are provided with through holes opposite to the first drive shaft (17). The diameter of the through holes of the protective isolation cover (19) and the atomizing cylinder (1) is larger than the diameter of the first drive shaft (17) and smaller than the inner diameter of the support cylinder (18).

5. The water atomization device for rapid condensation production of microcrystalline copper alloy powder according to claim 3, characterized in that: The rotating centrifugal disc (4) is provided with two sets of bearings. The bearing in the lower part of the rotating centrifugal disc (4) extends out of the lower end face of the connecting sleeve (41) and abuts against the cylindrical support (23). The support (23) is sleeved on the support tube (81) and fixed to the connecting disc (21).

6. The water atomization device for rapid condensation production of microcrystalline copper alloy powder according to claim 3, characterized in that: The outer diameter of the lower end of the protective flow guide (9) is smaller than the outer diameter of the rotating centrifugal disk (4). A cylindrical flow-limiting sleeve (10) is fixed inside the protective flow guide (9), and the diagonal brace (11) is fixed to the inner wall of the flow-limiting sleeve (10). The outer wall of the flow-limiting sleeve (10) and the outer ring of the lower end of the protective flow guide (9) are in the same cylindrical surface.

7. The water atomization device for rapid condensation production of microcrystalline copper alloy powder according to claim 2, characterized in that: The center of the arc of the cross section of the outer retaining ring (6) is located between the upper and lower rings of the outer retaining ring (6); The lower part of the outer retaining ring (6) is fitted with a circular ring support ring (25), and a number of circularly distributed balls are embedded on the support ring (25), the balls abutting against the outer wall of the outer retaining ring (6); a number of circularly distributed connecting rods (26) are fixedly connected to the support ring (25), and the outer end of the connecting rods (26) is fixedly connected to the inner wall of the atomizing cylinder (1).

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