Centrifugal atomization device for preparing ultrafine copper alloy powder

Abstract

The application relates to the technical field of alloy powder processing, in particular to a superfine copper alloy powder centrifugal atomization preparation device, which comprises a base, a support fixedly arranged on the base, and a cooling hopper arranged above the base; the cooling hopper is fixedly installed on the support; a water filter tank is installed at the bottom of the cooling hopper; an annular cooling pipe is arranged at the top of the inner side of the cooling hopper; and a plurality of spray heads are arranged on the annular cooling pipe. The superfine copper alloy powder centrifugal atomization preparation device rotates the cooling hopper to drive water flow to centrifugally spread, so that the water film is more uniform in the cooling hopper, the cooling effect on the molten liquid is also more uniform, and the alloy powder with uniform shape can be formed; the radioactive fan-shaped layout of the flow guide channel can make the molten metal liquid uniformly spread along the channel, eliminate the turbulent dead angle of the traditional straight channel, and the droplet diameter distribution has good dispersion.

Description

Technical Field

[0001] This invention relates to the field of alloy powder processing technology, specifically to a centrifugal atomization preparation device for ultrafine copper alloy powder. Background Technology

[0002] Metal powder refers to a group of metal particles with a size of less than 1 mm, including single metal powder, alloy powder, and certain refractory compound powders with metallic properties. It is the main raw material for powder metallurgy. Powder processing is mostly carried out by centrifugal atomization. However, the existing centrifugal atomization screens are mostly cylindrical. When rotating, due to stress, they will melt together before cooling down, which will lead to an increase in the size of the powder and affect the powder quality.

[0003] To address the aforementioned issues, Chinese Patent CN202310434133.9 discloses a centrifugal processing equipment and method for alloy powder processing. The equipment includes a frame with a rotating atomizing device mounted on it. The centrifugal processing equipment also includes a cooling device comprising a cooling hopper, a rotating drive assembly, and a mounting ring. The cooling hopper is mounted on the frame and is funnel-shaped. The rotating drive assembly is mounted on the cooling hopper and controls the rotation of the mounting ring. At least three nozzles are mounted on the mounting ring, symmetrically arranged along the central axis of the mounting ring. This method, through the frame, rotating atomizing device, and cooling device, enables the molten metal to contact the coolant immediately after being ejected, preventing multiple molten metal fragments from solidifying together. This solves the problem of molten metal adhering to the sidewalls of the water tank during production in traditional centrifugal processing equipment.

[0004] Its cooling hopper has a funnel-shaped structure and the nozzles revolve around the cooling hopper to spray water into the cooling hopper so that the water flows along the inner wall of the cooling hopper to form a water film. However, the inner wall of the cooling hopper is a smooth surface, and the water film spreads poorly on its inner wall, requiring more nozzles to be arranged. In addition, the water flow impacting the inner wall of the cooling hopper will also cause water splashing. All of the above methods will result in uneven formation of the water film in the cooling hopper. Although it can cool the alloy powder, the uneven water film will cause uneven cooling in various places, resulting in inconsistent quality of the alloy powder.

[0005] To address this, we propose a centrifugal atomization preparation device for ultrafine copper alloy powder. Summary of the Invention

[0006] To address the aforementioned technical problems, this application provides an ultrafine copper alloy powder centrifugal atomization preparation device, comprising a base, a support fixedly mounted on the base, a cooling hopper mounted above the base, the cooling hopper being fixedly installed on the support, a water filter tank installed at the bottom of the cooling hopper, an annular cooling pipe mounted on the top inner side of the cooling hopper, multiple nozzles mounted on the annular cooling pipe, a water pipe and a pump body being arranged between the water filter tank and the annular cooling pipe, a centrifugal disc being rotatably mounted in the middle inner side of the cooling hopper, and a dynamic guide vane being movably mounted on the outer side of the centrifugal disc.

[0007] In some embodiments, a bracket is fixedly mounted on the base, a power motor is mounted on the bracket, a drive gear is connected to the output end of the power motor, and a gear ring that meshes with the drive gear is mounted on the outer side of the cooling hopper.

[0008] In some embodiments, a plurality of annular protrusions are fixedly provided on the inner wall of the cooling hopper, and the plurality of annular protrusions are arranged in a linear array on the inner wall of the cooling hopper.

[0009] In some embodiments, a bracket is provided on the base, a motor is provided on the bracket, a drive shaft is connected to the output end of the motor, and the centrifugal disc is provided at the end of the drive shaft and rotates synchronously with the drive shaft.

[0010] In some embodiments, the centrifuge disc includes a disc body, a receiving hopper is provided at the top of the disc body, a receiving cavity is provided inside the disc body, the bottom of the receiving hopper is connected to the receiving cavity, and a plurality of flow guiding channels are provided inside the centrifuge disc, the plurality of flow guiding channels being arranged in a circumferential array inside the centrifuge disc.

[0011] In some embodiments, the flow channel is fan-shaped, radiating outward from the center of the centrifugal disc.

[0012] In some embodiments, the flow channel is composed of multiple stepped grooves connected together. The depth of the multiple stepped grooves gradually decreases from the center of the centrifugal disc to its outer circle. The stepped groove located on the innermost side of the centrifugal disc is connected to the receiving cavity, and a flow guiding slope is provided at the connection of adjacent stepped grooves.

[0013] In some embodiments, the connecting groove between the receiving cavity and the stepped groove is also provided with a guide slope.

[0014] In some embodiments, a plurality of dynamic guide vanes are embedded on the outer side of the centrifuge disc. The dynamic guide vanes are made of flexible material and correspond one-to-one with the guide channels. A groove is formed on the upper surface of the centrifuge disc, and a slider is slidably disposed in the groove. A support rod is provided on the slider. An insertion hole for inserting the support rod is formed in the dynamic guide vane. The end of the support rod slides through the centrifuge disc. A support spring is provided on the outer side of the support rod. The two ends of the support spring are respectively connected to the slider and the groove.

[0015] In some embodiments, the water filter tank includes a tank body at the bottom and a filter plate disposed at the top of the tank body. The filter plate is conical, and a drive shaft rotates through the filter plate. The bottom of the cooling hopper is connected to the edge of the filter plate through a sealed rotary joint. A lifting push rod is disposed on the base, and the output end of the lifting push rod is connected to the bottom of the tank body.

[0016] The present invention has at least the following beneficial effects:

[0017] 1. The rotation of the cooling tank drives the centrifugal diffusion of the water flow, making the water film more uniform in the cooling tank, thus making the cooling effect on the molten liquid more uniform and forming alloy powder with a uniform shape.

[0018] 2. The radial fan-shaped layout of the flow channel allows the molten metal to diffuse at a uniform speed along the channel, eliminating the turbulent dead zones of traditional straight channels, and resulting in better dispersion of droplet diameter distribution. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a cross-sectional view of the cooling hopper structure of the present invention;

[0021] Figure 3 This is a schematic diagram of a half-section of the cooling hopper structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the annular cooling pipe structure of the present invention;

[0023] Figure 5 This is a schematic diagram of the centrifuge disc structure of the present invention;

[0024] Figure 6 This is a schematic cross-sectional view of the centrifuge disc of the present invention;

[0025] Figure 7 For the present invention Figure 6 Enlarged structural diagram at point A in the middle;

[0026] Figure 8 This is a schematic diagram of the side cross-section of the centrifuge disc of the present invention;

[0027] Figure 9 For the present invention Figure 8 Enlarged structural diagram at point B;

[0028] Figure 10 This is a cross-sectional view of the water filter tank of the present invention.

[0029] In the diagram: 1. Cooling hopper; 2. Water filter tank; 21. Box body; 22. Filter plate; 23. Lifting push rod; 3. Annular cooling pipe; 4. Nozzle; 5. Centrifugal disc; 51. Disc body; 52. Receiving hopper; 53. Receiving cavity; 54. Guide channel; 541. Stepped groove; 55. Guide slope; 6. Dynamic guide vane; 61. Slide groove; 62. Sliding block; 63. Support rod; 64. Insertion hole; 65. Support spring; 7. Power motor; 8. Drive gear; 9. Gear ring; 10. Annular convex strip; 11. Drive shaft. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1: Please refer to Figures 1-4 This invention provides a technical solution: a centrifugal atomization preparation device for ultrafine copper alloy powder, including a base made of cast iron, which can be filled with shock-absorbing material to effectively absorb vibrations generated during operation. A support is fixedly mounted on the base, and a cooling hopper 1 is mounted above the base. The support supports the cooling hopper 1, which is fixedly mounted on the support. In actual use, the support can be configured as a spatial truss structure. Its specific structure and installation are existing technologies, and their purpose is only to provide support for the cooling hopper 1, so they will not be described in detail here. A water filter tank 2 is installed at the bottom of the cooling hopper 1. The purpose of the water filter tank 2 is to allow cooling water to pass through while the alloy powder remains, thereby achieving separation of the alloy powder and cooling water. An annular cooling pipe 3 is installed on the top inner side of the cooling hopper 1. Multiple nozzles 4 are installed on the annular cooling pipe 3, which spray water towards the inner wall of the cooling hopper 1. The water filter tank 2 and the annular cooling pipe 3 are connected. A water pipe and a pump body are installed between pipes 3 to achieve water circulation between the water filter tank 2 and the annular cooling pipe 3. The water pipe and pump body are not shown in the figure, as they are existing technology and will not be described in detail here. A centrifugal disc 5 is rotatably installed in the middle of the inner side of the cooling tank 1, and a dynamic guide plate 6 is movably installed on the outer side of the centrifugal disc 5. The dynamic guide plate 6 is used to adjust the angle after the metal solution is thrown out. When the speed of the centrifugal disc 5 is different, the dynamic guide plate 6 can guide the thrown molten liquid to different paths. For example, when the centrifugal force is large, the inclination angle of the dynamic guide plate 6 is small, and the molten liquid thrown out by the centrifugal disc 5 is also more dispersed. At this time, the molten liquid is directly thrown onto the inner wall of the cooling tank 1 to achieve rapid cooling. When the speed of the centrifugal disc 5 is small, the inclination angle of the dynamic guide plate 6 is relatively large. At this time, the molten liquid thrown out by the centrifugal disc 5 has a certain downward tilt angle, which can not only extend the flight distance of the molten liquid, but also disperse the molten liquid again in this path.

[0032] Example 2: Please refer to Figures 2-3 This invention provides a technical solution: a centrifugal atomization preparation device for ultrafine copper alloy powder. A support is fixedly installed on the base, and a power motor 7 is installed on the support. The output end of the power motor 7 is connected to a drive gear 8. A gear ring 9 that meshes with the drive gear 8 is installed on the outside of the cooling tank 1. During the preparation of alloy powder, the water sprayed from the nozzle 4 flows downward along the inner wall of the cooling tank 1, and the molten liquid thrown out is cooled by the water to produce alloy powder. In order to make the water film generated on the inner wall of the cooling tank 1 more uniform, the cooling tank 1 is set to be rotatable. The power motor 7 drives the drive gear 8 to rotate, and the drive gear 8 drives the gear ring 9 to rotate, which in turn drives the cooling tank 1 to rotate. When the cooling tank 1 rotates, it will drive the cooling water to spread radially along its inner wall, so that the cooling water is evenly distributed on the inner wall of the cooling tank 1. At the same time, the cooling water forms a spiral trajectory under the action of centrifugal force and its own weight, which can prolong the residence time of the cooling water. Centrifugal force can also assist in the separation of alloy powder and water, so that when the alloy powder moves to the top of the water filter tank 2, it is distributed on the outside, which is convenient for collection.

[0033] Multiple annular protrusions 10 are fixedly arranged on the inner wall of the cooling tank 1. The multiple annular protrusions 10 are arranged in a linear array on the inner wall of the cooling tank 1. The multiple annular protrusions 10 make the inner wall of the cooling tank 1 form a wave structure, which forces the flowing cooling water to generate a secondary vortex, which can increase the lateral diffusion of the cooling water in the cooling tank 1, and make the water film formed on the inner wall of the cooling tank 1 more uniform.

[0034] Example 3: Please refer to Figure 2 as well as Figures 5-6 The present invention provides a technical solution: a centrifugal atomization preparation device for ultrafine copper alloy powder. A support is provided on the base, and a motor is provided on the support. The support supports the motor. The output end of the motor is connected to a drive shaft 11. A centrifugal disc 5 is provided at the end of the drive shaft 11 and rotates synchronously with the drive shaft 11. In actual use, in order to reduce the vertical load on the motor, a reversing power transmission structure such as a bevel gear transmission can be added between the drive shaft 11 and the motor. The above-mentioned power transmission structures are all existing technologies and will not be described in detail here. The motor drives the drive shaft 11 to rotate, and the drive shaft 11 drives the centrifugal disc 5 to rotate and throw out the molten metal.

[0035] The centrifuge disc 5 includes a disc body 51, with a receiving hopper 52 at the top of the disc body 51. The receiving hopper 52 is inverted conical in shape. During the preparation process, a device such as a crucible that can discharge molten metal should be provided above the centrifuge disc 5. The molten metal is received by the receiving hopper 52 on the centrifuge disc 5 and thrown out by the centrifuge disc 5. A receiving cavity 53 is opened inside the disc body 51. The bottom of the receiving hopper 52 is connected to the receiving cavity 53. The molten metal flows along the receiving hopper 52 into the receiving cavity 53. Multiple flow channels 54 are opened inside the centrifuge disc 5. The flow channels 54 are connected to the receiving cavity 53. The multiple flow channels 54 are arranged in a circumferential array inside the centrifuge disc 5. When the centrifuge disc 5 rotates, the molten metal in the receiving cavity 53 is thrown out along the flow channels 54 under the action of centrifugal force to form small droplets, which are then cooled by cooling water to form alloy powder.

[0036] The flow channel 54 is fan-shaped, radiating outward from the center of the centrifugal disk 5. This fan-shaped design allows the molten metal to spread evenly along the radial layout of the fan-shaped channel after entering the flow channel 54, eliminating the turbulence hazards of traditional straight channels and making the droplets formed after the molten metal is thrown out more uniform.

[0037] Example 4: Please refer to Figure 7 The present invention provides a technical solution: a centrifugal atomization preparation device for ultrafine copper alloy powder. The flow channel 54 is composed of multiple stepped grooves 541 connected together. The depth of the multiple stepped grooves 541 gradually decreases from the center of the centrifugal disk 5 to its outer circle, and a flow velocity gradient is formed between the multiple stepped grooves 541. In this embodiment, three stepped grooves 541 are set. The stepped groove 541 located on the innermost side of the centrifugal disk 5 is connected to the receiving cavity 53. A flow guide slope 55 is provided at the connection of adjacent stepped grooves 541. The central stepped groove 541 can accumulate molten metal. The subsequent stepped grooves 541 can accelerate the molten metal and compress the liquid film thickness. The outermost stepped groove 541 can form a thin layer shear on the solution to make its atomization effect better. The flow guide slope 55 is used to transition between adjacent stepped grooves 541 to eliminate the eddies caused by the abrupt change of right angle, reduce the flow resistance of the molten metal, and thus make the molten metal flow smoothly in each step and reduce splashing.

[0038] The connecting groove between the receiving cavity 53 and the stepped groove 541 is also provided with a guide slope 55 to guide the molten metal from the receiving cavity 53 to the stepped groove 541.

[0039] Example 5: Please refer to Figures 6-10The present invention provides a technical solution: a centrifugal atomization preparation device for ultrafine copper alloy powder. Multiple dynamic guide plates 6 are embedded on the outside of the centrifugal disk 5. The dynamic guide plates 6 are made of flexible material and correspond one-to-one with the guide channels 54. A groove 61 is opened on the upper surface of the centrifugal disk 5. A slider 62 is slidably arranged in the groove 61. A support rod 63 is arranged on the slider 62. An insertion hole 64 for inserting the support rod 63 is opened in the dynamic guide plate 6. The end of the support rod 63 slides through the centrifugal disk 5. A support spring 65 is arranged on the outside of the support rod 63. The two ends of the support spring 65 are respectively connected to the slider 62 and the groove 61.

[0040] When the centrifuge disc 5 rotates, the slider 62 slides within the groove 61 under the action of centrifugal force. The distance the slider 62 moves depends on the magnitude of the centrifugal force, i.e., the rotational speed of the centrifuge disc 5. When the slider 62 moves, it drives the support rod 63 to move. The support rod 63 can be inserted into the insertion hole 64 when it moves. The support rod 63 is rigid, while the dynamic guide plate 6 is made of flexible material. Therefore, the greater the insertion depth of the support rod 63, the smaller the inclination angle of the dynamic guide plate 6. That is, the greater the rotational speed of the centrifuge disc 5, the smaller the inclination angle of the dynamic guide plate 6. As the rotational speed of the centrifuge disc 5 fluctuates, the dynamic guide plate 6 can adapt to the rotational speed of the centrifuge disc 5 and adjust its guiding effect on the solution in real time. When the rotational speed of the centrifuge disc 5 is large, the dispersion effect of the melt is better. At this time, the melt can be quickly cooled after being thrown out to form a uniform powder. When the rotational speed of the centrifuge disc 5 is relatively small, the flight distance of the melt under the action of the dynamic guide plate 6 becomes longer, increasing the diffusion effect.

[0041] The water filter tank 2 includes a box body 21 at the bottom and a filter plate 22 set on the top of the box body 21. The filter plate 22 is conical, and the drive shaft 11 rotates through the filter plate 22, allowing cooling water to pass through, thus leaving alloy powder on the filter plate 22. At the same time, due to the conical shape of the filter plate 22 and the rotation of the cooling bucket 1, the alloy powder is distributed on the outer edge of the aluminum plate. The bottom of the cooling bucket 1 is connected to the edge of the filter plate 22 through a sealed rotary joint. A lifting push rod 23 is provided on the base, and the output end of the lifting push rod 23 is connected to the bottom of the box body 21. The lifting push rod 23 can drive the box body 21 and the filter plate 22 to rise and fall. When it rises, the filter plate 22 abuts against the outer bottom of the cooling bucket 1. At this time, the filter plate 22 can perform a filtering function. When it is necessary to collect alloy powder, the cooling bucket 1 is stopped first, and then the lifting push rod drives the water filter tank 2 to fall, at which time the alloy powder on the filter plate 22 can be scraped off and collected.

[0042] In summary, the molten metal flows from the crucible into the inverted conical receiving hopper 52 at the top of the centrifugal disc 5, and then into the receiving cavity 53 inside the disc body 51. When the centrifugal disc 5 rotates, the molten metal surges into the guide channel 54 under the action of centrifugal force. The radial layout of the guide channel 54 forces the molten metal to spread evenly into a thin liquid film. The molten metal is thrown out of the channel outlet and guided by the flexible dynamic guide plate 6 on the outside. At the same time, the rotating cooling hopper 1 drives the water film on the inner wall to flow in a spiral. The annular convex strip 10 makes the water film thickness uniform. The thrown molten metal droplets solidify rapidly after contacting the water film. The resulting alloy powder slides down with the water flow to the conical filter plate 22. After the cooling hopper 1 stops, the lifting push rod 23 lowers the filter tank 2, which can scrape the powder accumulated on the edge of the filter plate 22 to complete the collection.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A centrifugal atomization preparation device for ultrafine copper alloy powder, comprising a base, on which a support is fixedly mounted, characterized in that: A cooling hopper (1) is provided above the base. The cooling hopper (1) is fixedly installed on the bracket. A water filter box (2) is installed at the bottom of the cooling hopper (1). An annular cooling pipe (3) is provided on the top inner side of the cooling hopper (1). Multiple nozzles (4) are provided on the annular cooling pipe (3). A water pipe and a pump body are provided between the water filter box (2) and the annular cooling pipe (3). A centrifugal disc (5) is rotatably provided in the middle inner side of the cooling hopper (1). A dynamic guide vane (6) is movably provided on the outer side of the centrifugal disc (5). The inner wall of the cooling tank (1) is fixedly provided with a plurality of annular protrusions (10), and the plurality of annular protrusions (10) are arranged in a linear array on the inner wall of the cooling tank (1); The centrifuge disc (5) includes a disc body (51), a receiving hopper (52) is provided on the top of the disc body (51), a receiving cavity (53) is provided inside the disc body (51), the bottom of the receiving hopper (52) is connected to the receiving cavity (53), and a plurality of guide channels (54) are provided inside the centrifuge disc (5), and the plurality of guide channels (54) are arranged in a circular array inside the centrifuge disc (5); Multiple dynamic guide vanes (6) are embedded on the outside of the centrifuge disc (5). The dynamic guide vanes (6) are made of flexible material and correspond one-to-one with the guide channels (54). A groove (61) is provided on the upper surface of the centrifuge disc (5). A slider (62) is slidably arranged in the groove (61). A support rod (63) is provided on the slider (62). An insertion hole (64) for inserting the support rod (63) is provided in the dynamic guide vane (6). The end of the support rod (63) slides through the centrifuge disc (5). A support spring (65) is provided on the outside of the support rod (63). The two ends of the support spring (65) are connected to the slider (62) and the groove (61) respectively.

2. The centrifugal atomization preparation device for ultrafine copper alloy powder according to claim 1, characterized in that: A bracket is fixedly installed on the base, and a power motor (7) is installed on the bracket. The output end of the power motor (7) is connected to a drive gear (8). A gear ring (9) that meshes with the drive gear (8) is installed on the outside of the cooling hopper (1).

3. The centrifugal atomization preparation device for ultrafine copper alloy powder according to claim 1, characterized in that: A bracket is provided on the base, and a motor is provided on the bracket. The output end of the motor is connected to a drive shaft (11). The centrifugal disc (5) is located at the end of the drive shaft (11) and rotates synchronously with the drive shaft (11).

4. The centrifugal atomization preparation device for ultrafine copper alloy powder according to claim 1, characterized in that: The flow channel (54) is fan-shaped, radiating outward from the center of the centrifugal disc (5).

5. The centrifugal atomization preparation device for ultrafine copper alloy powder according to claim 1, characterized in that: The flow channel (54) is composed of multiple stepped grooves (541) connected together. The depth of the multiple stepped grooves (541) gradually decreases from the center of the centrifugal disk (5) to its outer circle. The stepped groove (541) located on the innermost side of the centrifugal disk (5) is connected to the receiving cavity (53). A flow guiding slope (55) is provided at the connection of adjacent stepped grooves (541).

6. The centrifugal atomization preparation device for ultrafine copper alloy powder according to claim 5, characterized in that: The connecting groove between the receiving cavity (53) and the stepped groove (541) is also provided with a guide slope (55).

7. The centrifugal atomization preparation device for ultrafine copper alloy powder according to claim 3, characterized in that: The water filter tank (2) includes a box body (21) at the bottom and a filter plate (22) set on the top of the box body (21). The filter plate (22) is conical and the drive shaft (11) rotates through the filter plate (22). The bottom of the cooling hopper (1) is connected to the edge of the filter plate (22) through a sealed rotary joint. A lifting push rod (23) is provided on the base. The output end of the lifting push rod (23) is connected to the bottom of the box body (21).

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