Preparation device and method of graphene aluminum alloy powder

Abstract

The graphene aluminum alloy powder preparation device comprises a plasma atomization powder preparation equipment body and a shaping structure arranged on the lower portion of the interior of an atomization chamber of the plasma atomization powder preparation equipment body, a bevel gear set is linked through a driving motor, and an ejection cam, a conveying screw and a centrifugal screw are synchronously driven to operate; the method comprises the following steps: firstly, collecting and conveying atomized powder to a wake flow position of a plasma torch system, finishing plasma shaping and defective particle removal of the powder by utilizing plasma wake flow, and then realizing centrifugal screening and graded collection on the shaped powder by matching a centrifugal screw rod with a centrifugal net and a material distribution barrel; the corresponding preparation method is based on the device, uniform dispersion and infiltration combination of graphene powder and molten aluminum alloy liquid drops are achieved in the plasma atomization powder preparation stage, and conveying and shaping, centrifugal screening and classified collection of the powder are sequentially completed subsequently; according to the device and the method, the integrated continuous operation of atomization powdering, shaping, defect removing and specification screening of the graphene aluminum alloy powder is achieved, and the preparation process is greatly simplified.

Description

Technical Field

[0001] This invention relates to the field of powder metallurgy technology, specifically to an apparatus and method for preparing graphene aluminum alloy powder. Background Technology

[0002] The preparation of graphene aluminum alloy powder belongs to the field of advanced metal matrix composite powder research and development. Aluminum alloy powder, with its low density, high specific strength, excellent thermal and electrical conductivity, and processing and forming properties, has become a core basic material in aerospace, new energy vehicles, high-end electronic packaging, and metal additive manufacturing. Currently, under the background of the national dual-carbon strategy and the upgrading of high-end manufacturing, the domestic aluminum alloy powder industry is showing a steady growth trend. The demand for high-purity, high-sphericity high-performance aluminum alloy powder continues to rise, and related industries have also received key support from national policies such as the New Materials Special Plan. As a novel two-dimensional nanomaterial, graphene has ultra-high mechanical strength, excellent thermal and electrical conductivity, and wear resistance, making it an ideal reinforcement for aluminum matrix composites. Graphene aluminum alloy powder, formed by combining graphene with aluminum alloy powder, can serve as a key raw material for preparing high-performance aluminum matrix composites, further improving the comprehensive performance of aluminum matrix materials. This meets the development needs of downstream fields such as aerospace and new energy for lightweight, high-performance metal materials. The research and optimization of its preparation technology has also become an important research direction in the field of materials, driving the continuous upgrading of the high-end aluminum matrix composite industry.

[0003] Currently, conventional plasma preparation devices for graphene aluminum alloy powders typically require shaping and defect particle removal after plasma atomization to ensure product quality and solidify the foundation for additive manufacturing printing effects. This involves removing small amounts of satellite powder, irregular particles, and hollow powder generated during atomization, thereby improving the sphericity, flowability, and bulk density of the powder. However, existing preparation equipment cannot simultaneously perform powder preparation and shaping operations, resulting in a cumbersome overall preparation process and redundant operation procedures for graphene aluminum alloy powders.

[0004] To this end, a device and method for preparing graphene aluminum alloy powder are proposed. Summary of the Invention

[0005] The purpose of this invention is to provide an apparatus and method for preparing graphene aluminum alloy powder, so as to solve the problem of cumbersome process of graphene aluminum alloy powder mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a preparation apparatus for graphene aluminum alloy powder, comprising: Main body of plasma atomization powder making equipment; The shaping structure is located below the atomization chamber of the main body of the plasma atomization powder making equipment; The shaping structure includes a powder seat; The surface of the powder seat has a groove with an internal shape that fits into the mounting platform and is bolted to a flexible gasket. The gasket has symmetrically arranged through-holes along its axis at its low-lying area near the included angle of the mounting platform. These through-holes communicate with material channels arranged laterally on the left and right sides inside the powder seat. A first conveying screw is mounted on a bearing inside the material channel. Both ends of the first conveying screw are coaxially driven by a second bevel gear set and a top cam, both mounted on bearings inside the powder seat. The bevel gear shafts on opposite sides of the second bevel gear set and the first conveying screw are connected to the bearings on the powder seat... The first bevel gear set inside is rigidly connected coaxially. The bevel gear shaft ends of the first bevel gear set located on the upper and lower sides are connected to the drive motor and the centrifugal screw located on the upper side of the powder seat through coupling and bearing. The centrifugal screw is rotated and constrained inside the wake support body with the bearing bracket. The bevel gear shaft ends of the second bevel gear set located in the middle are rigidly connected to the second conveying screw arranged between the second bevel gear sets. Feeding pipes are fixedly inserted on both sides of the wake support body. The second conveying screw extends upward from inside the powder seat and is adapted to be inserted into the vertical tube of the feeding pipe.

[0007] Preferably, the powder holder is positioned inside the atomization chamber of the main body of the plasma atomization powder making equipment. The surface of the powder holder facing the plasma torch system has a fan-shaped groove for easy collection of metal powder, and the powder holder has an integrally provided mounting platform protruding from the powder holder at the axial position of the groove.

[0008] Preferably, the pad that is in contact with the inclined powder collection trough surface is not connected to the powder seat.

[0009] Preferably, the wheel chamber where the top material cam is located is open to the metal powder collection groove on the powder seat surface, and during rotation, the protruding part on the side makes pushing contact with the bottom surface of the gasket.

[0010] Preferably, the second bevel gear set consists of three meshing bevel gears, and the bevel gear connected to the first conveying screw has multiple through powder conveying holes at a position flush with the inner wall of the space where the first conveying screw is located.

[0011] Preferably, the upper end of the wake support is narrowed after expansion, and the narrowed upper end extends to the wake position of the plasma torch system.

[0012] Preferably, each of the feeding pipes is equipped with a powder spraying pump body that assists in the extraction and spraying of metal powder, and the upper end of the second conveying screw extends to the lower side of the powder spraying pump body.

[0013] Preferably, the lower end of the wake support is fixed to the mounting platform at the center of the metal powder collection groove on the upper surface of the powder seat. The wake support has a long break along its vertical path, and the break is reconnected integrally with a centrifugal mesh using bolts. The inner surface of the centrifugal mesh is flush with the wake support, and the surface of the centrifugal mesh is evenly arranged with mesh holes for centrifugal sieving of the powder from top to bottom. A distribution cylinder is bolted to the outside of the wake support. The cylinder is divided into a collection space for the centrifugally separated powder by multiple integrated compartment plates. The inner surface of the distribution cylinder is provided with an isolation layer to reduce centrifugal impact. The surfaces of the compartment plates that contact the powder are all inclined. The outer surface of the distribution cylinder is provided with a discharge port for collecting powder on the inclined lower side of each compartment plate. The discharge port is provided with a manually openable and closable door structure. The shaping structure and the structure that contacts the metal powder are treated in the same way as the inner wall of the atomizing chamber.

[0014] A preferred method for preparing graphene-aluminum alloy powder includes the following specific steps: S1. Start the main body of the plasma atomization powder making equipment to complete the initial preparation of graphene aluminum alloy powder. The atomized powder is collected by the fan-shaped groove of the powder seat, and the drive motor in the powder seat is started simultaneously. S2. The drive motor drives the top cam and each screw through the first bevel gear set and the second bevel gear set. After the powder is collected at the discharge port, it is conveyed by the first conveying screw, and then sprayed along the feed pipe to the tail position of the plasma torch system by the second conveying screw in conjunction with the powder spraying pump body, thus completing the plasma shaping of powder and the removal of defective particles. S3. After shaping, the powder enters the tail flow support and is conveyed downward by the centrifugal screw. The centrifugal force and centrifugal screen are used to achieve powder classification and screening. After screening, the powder is thrown into the distribution cylinder for temporary storage. S4. Close the main body and drive motor of the plasma atomizing powder making equipment, open the closed door structure of the discharge port of the distribution cylinder, and collect graphene aluminum alloy powder of different specifications from each discharge port through the guide plate of the distribution chamber.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention utilizes an integrated shaping structure below the atomization chamber of the main body of the plasma atomization powder making equipment. Combined with a transmission design that uses a drive motor to drive the first and second bevel gear sets, which in turn drive the top cam, first conveying screw, second conveying screw, and centrifugal screw to operate synchronously, after the main body of the plasma atomization powder making equipment completes the initial atomization of graphene aluminum alloy powder, the top cam can directly push the elastic pad at a uniform speed to achieve efficient collection and residue-free conveying of the atomized powder to the discharge port. Then, the first and second conveying screws, in conjunction with the powder spraying pump, precisely spray the powder onto the feeding pipe and deliver it to the tail of the plasma torch system. The high-temperature kinetic energy of the plasma tail completes the plasma shaping of the powder, simultaneously removing defective particles such as satellite powder, irregular particles, and hollow powder, effectively improving the sphericity, flowability, and loose packing density of the graphene aluminum alloy powder. 2. This invention utilizes a centrifugal screw with an adjustable spiral ribbon inside the tailstock, a centrifugal mesh with staged mesh openings, and a distribution cylinder with an inclined chamber plate and an independent discharge port. This allows for direct centrifugal sieving and graded collection of powder after shaping, achieving integrated continuous operation of graphene aluminum alloy powder atomization, shaping, defect removal, and specification sieving. It completely solves the problems of cumbersome processes and redundant operation procedures caused by the inability of traditional preparation equipment to simultaneously complete powder preparation and shaping, significantly improving powder preparation efficiency and production continuity. Attached Figure Description

[0016] Figure 1 This is an overall structural view of the present invention; Figure 2 This is a cross-sectional view of the overall structure of the present invention along the front-rear direction from the center; Figure 3 This is a cross-sectional view of the overall structure of the present invention along the left-right direction from the center. Figure 4 This is a schematic diagram of the shaping structure of the present invention; Figure 5 This is a cross-sectional view of the shaping structure of the present invention; Figure 6 For the present invention Figure 3 Enlarged view of point A in the middle.

[0017] In the picture: 1. Main body of plasma atomization powder making equipment; 2. Shaping structure; 21. Powder holder; 211. Drive motor; 212. First bevel gear set; 213. Second bevel gear set; 2131. Powder feeding hole; 214. First conveying screw; 215. Top material cam; 216. Shim; 2161. Material discharge port; 22. Wake support; 221. Centrifugal screen; 222. Centrifugal screw; 223. Distributor cylinder; 2231. Discharge port; 224. Divider plate; 225. Feeding pipe; 2251. Second conveying screw; 2252. Powder spraying pump body. Detailed Implementation

[0018] 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.

[0019] Please see Figures 1 to 6 This invention provides a technical solution for a preparation apparatus and method for graphene-aluminum alloy powder: An apparatus for preparing graphene-aluminum alloy powder, comprising: The main body 1 of the plasma atomization powder making equipment includes a plasma torch system, a wire feeding system, an atomization chamber, and supporting vacuum and gas control systems, etc. Shaping structure 2 is located below the atomization chamber of the main body 1 of the plasma atomization powder making equipment; The shaping structure 2 includes a powder seat 21, which is positioned inside the atomization chamber of the main body 1 of the plasma atomization powder making equipment. The powder holder 21 has a fan-shaped groove on its surface facing the plasma torch system to facilitate the collection of metal powder. An integral mounting platform protruding from the powder holder 21 is located at the axial center of the groove. An elastic gasket 216 is bolted to the mounting platform within the groove on the surface of the powder holder 21. The gasket 216, which is in contact with the inclined powder collection trough surface, is not connected to the powder holder 21. A through-hole 2161 is symmetrically arranged along the axis at the low-lying area near the included angle of the mounting platform on the gasket 216. Corresponding to the through-hole 2161, a through hole of the same size is arranged downwards at the included angle of the metal powder collection groove on the surface of the powder holder 21. The through-hole 2161, in conjunction with the through hole, connects to the material channels arranged laterally on the left and right sides inside the powder holder 21. The material channel is connected, and the internal bearing of the material channel is equipped with a first conveying screw 214. The two ends of the first conveying screw 214 are coaxially integrated with a second bevel gear set 213 and a top cam 215, which are respectively equipped with bearings inside the powder seat 21. The top cam 215's chamber opens to the metal powder collection groove on the surface of the powder seat 21, and during rotation, its side protrusion contacts the bottom surface of the gasket 216. The second bevel gear set 213 consists of three meshing bevel gears, and the bevel gear connected to the first conveying screw 214 has multiple through-holes 2131 at a position flush with the inner wall of the space containing the first conveying screw 214. The bevel gear shaft end on one side of the 14th bevel gear is rigidly connected coaxially to the first bevel gear set 212, which is configured inside the powder seat 21 via bearings. The first bevel gear set 212 consists of multiple meshing bevel gears that do not interfere with each other's movements. The bevel gear shaft ends on the upper and lower sides are connected to the drive motor 211 configured inside the powder seat 21 and the centrifugal screw 222 located on the upper side of the powder seat 21 via couplings and bearings. The centrifugal screw 222 is rotated and constrained inside the wake support 22 via bearing brackets, and the spiral strip on the surface of the centrifugal screw 222 can be adjusted adaptively. The bevel gear shaft end of the second bevel gear set 213 located in the middle is rigidly connected to the second conveying screw 2251 configured between the second bevel gear sets 213. The connection is made such that the lower end of the second conveying screw 2251 is lower than the space where the first conveying screw 214 is located, and the spiral strips on the surfaces of the first conveying screw 214 and the second conveying screw 2251 can be adaptively adjusted to achieve stable upward conveying of the powder conveyed by the first conveying screw 214 to the position of the second bevel gear set 213. The upper end of the tail support 22 is set with a narrowed port after expansion, and the narrowed port is arranged at the tail position of the plasma torch system. The expansion position of the tail support 22 is fixedly interspersed with irregularly shaped feeding pipes 225 on both sides of the second conveying screw 2251. The feeding pipes 225 are isolated and arranged with powder spraying pumps 2252 to assist the extraction and spraying of metal powder along their paths.The second conveying screw 2251 extends upward from inside the powder holder 21 and fits into the vertical tube of the feeding pipe 225. The upper end of the second conveying screw 2251 extends to the lower side of the powder spraying pump body 2252. Driven by the drive motor 211 in conjunction with the first bevel gear set 212 and the second bevel gear set 213, the top cam 215 pushes the shim 216 at a uniform speed, guiding and collecting the metal powder towards the discharge port 2161. The first conveying screw 214 then conveys the collected metal powder to the second conveying screw 2251. Finally, the second conveying screw 2251, in conjunction with the powder spraying pump body 2252, sprays the metal powder along the feeding pipe 225 towards the tail of the plasma torch, achieving plasma shaping and defect particle removal of the produced metal powder.

[0020] During operation, the main body 1 of the plasma atomization powder making equipment first performs preliminary plasma atomization powder making on the graphene aluminum alloy powder. The atomized powder is collected by the fan-shaped groove of the powder seat 21. The drive motor 211 is driven by the meshing of the bevel gear set, which synchronously drives each screw and the top material cam 215 to rotate. The top material cam 215 pushes the elastic pad 216 to make the powder gather to the drop port 2161. After entering the transverse material channel through the through hole, it is conveyed by the first conveying screw 214 and enters the conveying path of the second conveying screw 2251 through the powder passage hole 2131. The second conveying screw 2251, together with the powder spraying pump body 2252, sprays the powder along the feeding pipe 225 to the tail position of the plasma torch system. The plasma tail is used to complete the powder shaping and remove various defective particles.

[0021] In summary, by setting up the integrated shaping structure 2 below the atomization chamber of the plasma atomizing powder preparation equipment body 1, and coordinating the drive motor 211 to drive the first bevel gear set 212, the second bevel gear set 213 to drive the top material cam 215, the first conveying screw 214, the second conveying screw 2251 and the centrifugal screw 222 to operate synchronously, after the plasma atomizing powder preparation equipment body 1 completes the initial atomization powder preparation of graphene aluminum alloy powder, the top material cam 215 can directly move the elastic pad 21. The uniform pushing speed of the 6-speed push achieves efficient collection and residue-free conveying of atomized powder to the discharge port 2161. Then, the powder is precisely sprayed onto the feeding pipe 225 and sent to the tail position of the plasma torch system by the first conveying screw 214 and the second conveying screw 2251 in conjunction with the powder spraying pump body 2252. The powder is then used to complete the plasma shaping of the powder by utilizing the high temperature kinetic energy of the plasma tail, and simultaneously removes defective particles such as satellite powder, irregular particles, and hollow powder, effectively improving the sphericity, flowability and loose density of the graphene aluminum alloy powder.

[0022] As one embodiment of the present invention, such as Figures 2 to 5As shown, the lower end of the wake support 22 is fixed to the mounting platform at the center of the metal powder collection groove on the upper surface of the powder seat 21. The wake support 22 has a long-distance break along its vertical path, and the break is reconnected integrally with a centrifugal mesh 221 using bolts. The inner surface of the centrifugal mesh 221 is flush with the wake support 22, and the surface of the centrifugal mesh 221 is evenly arranged with mesh holes for centrifugal sieving of the powder from top to bottom. A distribution cylinder 223 is bolted onto the outside of the wake support 22. The inside of the distribution cylinder 223 is divided into powder collection spaces by multiple integral compartment plates 224. The inner surface of the distribution cylinder 223 is equipped with an isolation layer to reduce centrifugal impact. 4. All surfaces in contact with the powder are set as inclined surfaces, and the outer surface of the distribution cylinder 223 is provided with a powder collection port 2231 on the inclined lower side of each compartment plate 224. The port of the discharge port 2231 is provided with a manually openable and closed sealing door structure. Under the drive of the drive motor 211, the centrifugal screw 222 is driven in conjunction with the first bevel gear set 212 to guide the shaped metal powder downward. During the spiral conveying process, the centrifugal force is used in conjunction with the centrifugal screen 221 to achieve centrifugal sieving of different metal powders. The structure of the shaping structure 2 that is in contact with the metal powder is coated with the same high temperature resistant, erosion resistant and anti-metal melt adhesion ceramic coating as the inner wall of the atomizing chamber, or is treated with surface hardening treatment such as nitriding and carburizing.

[0023] During operation, the shaped powder enters the tail flow support 22 and is spirally conveyed downward by the centrifugal screw 222. The centrifugal force, together with the centrifugal screen 221 with its staged mesh, completes the centrifugal sieving of powders of different specifications. After sieving, the powder is thrown to the distribution cylinder 223 for temporary storage. After the powder making is completed, the closed door is opened manually, and the powder of the corresponding specification is collected from the discharge port 2231 by the distribution plate 224.

[0024] In summary, by combining the centrifugal screw 222 with an adjustable spiral ribbon inside the tail support 22 with the centrifugal mesh 221 with staged mesh holes, and the distribution cylinder 223 with an inclined chamber plate 224 and an independent discharge port 2231 on the outside, the powder can be directly centrifuged, sieved, and graded after shaping. This achieves integrated continuous operation of graphene aluminum alloy powder atomization, shaping, defect removal, and specification sieving, completely solving the problems of cumbersome processes and redundant operation procedures caused by the inability of traditional preparation equipment to simultaneously complete powder preparation and shaping operations, and greatly improving the powder preparation efficiency and production continuity.

[0025] Working Principle: During operation, the main body 1 of the plasma atomization powder making equipment first completes the preliminary plasma atomization powder making of graphene aluminum alloy powder. The atomized metal powder is collected by the fan-shaped groove of the powder seat 21 below the atomization chamber. The drive motor 211 drives the top cam 215, the first conveying screw 214, the second conveying screw 2251, and the centrifugal screw 222 to rotate simultaneously through the meshing transmission of the first bevel gear set 212 and the second bevel gear set 213. When the top cam 215 rotates, it pushes the bottom surface of the elastic pad 216 at a uniform speed, causing the powder on the pad 216 to gather at the discharge port 2161 in the low-lying area. The powder enters the transverse material channel through the discharge port 2161 and the corresponding through hole of the powder seat 21, and is conveyed by the first conveying screw 214 to the second bevel gear set 213. It then enters the conveying path of the second conveying screw 2251 through the powder passage hole 2131 on the surface of the bevel gear. The second conveying screw 2251... The powder is conveyed upwards, and with the assistance of the powder spraying pump 2252, the powder is sprayed along the feed pipe 225 to the tail position of the plasma torch system. The plasma tail is used to shape the powder, and defective particles such as satellite powder, irregular particles, and hollow powder are removed simultaneously. After the powder is shaped, it enters the tail support 22 and is spirally conveyed downwards by the centrifugal screw 222. The centrifugal force generated during the conveying process, together with the staged mesh of the centrifugal screen 221, achieves centrifugal sieving of powders of different specifications. The sieved powder is thrown into the external distribution cylinder 223 for temporary storage. After the powder making is completed, the closed door can be opened manually, and the corresponding specifications of metal powder can be collected from the discharge port 2231 under the guidance and assistance of the compartment plate 224. In this way, the main body 1 of the plasma atomization powder making equipment, together with the shaping structure 2, can realize the integrated operation of graphene aluminum alloy powder atomization powder making, shaping, defect removal and sieving.

[0026] It should be noted that the core principle of the plasma atomization powder production equipment for graphene aluminum alloy powder is as follows: First, the aluminum alloy raw material is heated to a molten state through the equipment's melting and heating system to form a continuous and stable aluminum liquid stream. The equipment's plasma spray gun generates a high-temperature, high-speed plasma jet, which impacts the aluminum liquid stream with its high-temperature kinetic energy, breaking it into a large number of fine molten aluminum alloy droplets. Simultaneously, the equipment's powder conveying system delivers graphene powder along with the carrier gas into the plasma atomization area. The graphene powder is uniformly dispersed in the high-temperature plasma environment and fully contacts and wets the molten aluminum alloy droplets. Driven by the high-speed airflow of the plasma jet, the aluminum alloy droplets incorporating graphene rapidly fly towards the collection area, undergoing rapid cooling and solidification during the process, ultimately forming uniformly dispersed spherical graphene aluminum alloy powder. The bevel gears of the first bevel gear set 212 and the second bevel gear set 213 can be replaced with different gear sizes as needed to achieve different differential transmission effects.

[0027] A method for preparing graphene-aluminum alloy powder, the specific steps of which are as follows: S1. Preliminary debugging and initial preparation of the equipment: First, start the vacuum system of the main body 1 of the plasma atomizing powder making equipment to evacuate the atomizing chamber. Then, introduce protective gas through the gas control system. Subsequently, start the main body 1 of the plasma atomizing powder making equipment. Its melting heating system heats the aluminum alloy raw material to a molten state to form a continuous and stable aluminum liquid stream. The plasma torch system generates a high-temperature and high-speed plasma jet to break the aluminum liquid stream and form molten aluminum alloy droplets. At the same time, the powder conveying system sends the graphene powder into the plasma atomization area along with the carrier gas. The graphene powder is evenly dispersed and fully wetted and combined with the molten aluminum alloy droplets. The graphene aluminum alloy powder formed by rapid cooling and solidification is collected by the fan-shaped groove of the powder seat 21 below the atomizing chamber. The drive motor 211 inside the powder seat 21 is started simultaneously. S2. Powder conveying and plasma shaping: The drive motor 211, through the meshing transmission of the first bevel gear set 212 and the second bevel gear set 213, synchronously drives the top cam 215, the first conveying screw 214, the second conveying screw 2251, and the centrifugal screw 222 to rotate. The top cam 215 rotates at a uniform speed and pushes the bottom surface of the elastic pad 216, causing the graphene aluminum alloy powder on the pad 216 to collect towards the discharge port 2161. The powder enters the transverse material channel through the discharge port 2161 and the corresponding through holes of the powder seat 21. The powder is conveyed by the first conveying screw 214 to the second bevel gear set 213 and enters the conveying path of the second conveying screw 2251 through the powder passage 2131. The second conveying screw 2251 conveys the powder upward, and at the same time, it assists the powder spraying pump body 2252 on the feed pipe 225 to spray the powder precisely along the feed pipe 225 to the tail position of the plasma torch system. The high temperature kinetic energy of the plasma tail is used to complete the plasma shaping of the powder and simultaneously remove defective particles such as satellite powder, irregular particles, and hollow powder. S3. Centrifugal sieving and powder storage: The shaped graphene aluminum alloy powder enters the tail flow support 22, which is fixedly connected to the powder seat 21. The centrifugal screw 222 conveys the powder downwards in a spiral. The centrifugal force generated during the conveying process, combined with the uniformly arranged mesh of the centrifugal mesh 221 at the break of the tail flow support 22, realizes the centrifugal sieving of graphene aluminum alloy powder with different particle size specifications. The sieved powder is thrown into the distribution cylinder 223 outside the tail flow support 22. It is guided by the inclined chamber plate 224 inside the distribution cylinder 223 to fall into the corresponding chamber for temporary storage. The isolation layer on the inner surface of the distribution cylinder 223 reduces the loss caused by the centrifugal impact of the powder. S4. Graded collection and operation completion: After the graphene aluminum alloy powder preparation operation is completed, first shut down the main body 1 of the plasma atomization powder preparation equipment and the drive motor 211, then manually open the closed door structure of each discharge port 2231 on the outer surface of the distribution cylinder 223. Under the guidance of the inclined surface of the compartment plate 224, graphene aluminum alloy powder of different particle size specifications is collected from each discharge port 2231 in a graded manner, thus completing the entire graphene aluminum alloy powder preparation process.

[0028] When those skilled in the art encounter powder production needs for other materials, such as aluminum alloys, copper alloys, nickel alloys, titanium alloys, high-entropy alloys, etc., including but not limited to the aforementioned alloys, as well as carbon materials (graphene and nanotubes) and ceramic particles (including silicon carbide, silicon nitride, titanium diboride, alumina, aluminum nitride), and other related composite materials, if there are powder production processes, methods, and related equipment that are the same as, similar to, or similar to the principles and spirit of this invention, they all fall within the protection scope of this application.

[0029] 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. The scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An apparatus for preparing graphene-aluminum alloy powder, comprising: Main body of plasma atomizing powder making equipment (1); The shaping structure (2) is located below the atomization chamber of the main body (1) of the plasma atomizing powder making equipment; The shaping structure (2) includes a powder seat (21); Its features are: The groove on the surface of the powder seat (21) is fitted with a mounting platform and bolted to a flexible gasket (216). The gasket (216) has a symmetrically arranged, through-hole (2161) along its axis at a low point near the included angle of the mounting platform. The through-hole (2161) communicates with a material channel arranged laterally inside the powder seat (21). A first conveying screw (214) is mounted inside the material channel with bearings. Both ends of the first conveying screw (214) are coaxially driven by a second bevel gear set (213) and a top cam (215) mounted inside the powder seat (21). The bevel gear shafts of the second bevel gear set (213) and the first conveying screw (214) on opposite sides are connected via bearings inside the powder seat (21). A bevel gear set (212) is rigidly connected coaxially. The bevel gear shaft ends of the first bevel gear set (212) located on the upper and lower sides are connected to the drive motor (211) configured inside the powder seat (21) and the centrifugal screw (222) located on the upper side of the powder seat (21) through a coupling and bearing. The centrifugal screw (222) is rotated and constrained inside the wake support body (22) with the bearing bracket. The bevel gear shaft ends of the second bevel gear set (213) located in the middle are rigidly connected to the second conveying screw (2251) configured between the second bevel gear set (213). The two sides of the wake support body (22) are fixedly inserted with feeding pipes (225), and the second conveying screw (2251) extends upward from inside the powder seat (21) and is adapted to be inserted into the vertical tube of the feeding pipe (225).

2. The apparatus for preparing graphene-aluminum alloy powder according to claim 1, characterized in that: The powder seat (21) is positioned inside the atomization chamber of the main body (1) of the plasma atomization powder making equipment. The surface of the powder seat (21) facing the plasma torch system has a fan-shaped groove that facilitates the collection of metal powder. The powder seat (21) has an integral mounting platform protruding from the powder seat (21) at the axial position of the groove.

3. The apparatus for preparing graphene-aluminum alloy powder according to claim 1, characterized in that: The gasket (216) that is in contact with the inclined powder collection trough is not connected to the powder seat (21).

4. The apparatus for preparing graphene aluminum alloy powder according to claim 1, characterized in that: The wheel chamber where the top cam (215) is located opens to the metal powder collection groove on the surface of the powder seat (21), and during rotation, the protruding part on the side makes a pushing contact with the bottom surface of the pad (216).

5. The apparatus for preparing graphene aluminum alloy powder according to claim 1, characterized in that: The second bevel gear set (213) consists of three meshing bevel gears, and the bevel gear connected to the first conveying screw (214) has multiple through powder conveying holes (2131) at a position where the surface of the bevel gear is flush with the inner wall of the space where the first conveying screw (214) is located.

6. The apparatus for preparing graphene aluminum alloy powder according to claim 1, characterized in that: The upper end of the wake support (22) is narrowed after expansion, and the narrowed upper end extends to the wake position of the plasma torch system.

7. The apparatus for preparing graphene-aluminum alloy powder according to claim 1, characterized in that: The feed pipe (225) is equipped with a powder spraying pump body (2252) that assists in the extraction and spraying of metal powder along its pipe path, and the upper end of the second conveying screw (2251) extends to the lower side of the powder spraying pump body (2252).

8. The apparatus for preparing graphene aluminum alloy powder according to claim 1, characterized in that: The lower end of the wake support (22) is fixed to the mounting platform at the center of the metal powder collection groove on the upper surface of the powder seat (21). The wake support (22) has a long break along its vertical path, and the break is reconnected integrally with a centrifugal mesh (221) by bolts. The inner surface of the centrifugal mesh (221) is flush with the wake support (22), and the surface of the centrifugal mesh (221) is evenly arranged with mesh holes for centrifugal sieving of powder from top to bottom. A distribution cylinder (2) is bolted to the outside of the wake support (22). 23), and the inside of the distributing cylinder (223) is divided into a collection space for the centrifugally separated powder by the distributing cylinder (223) by a plurality of integrated compartment plates (224), and the inner cylinder surface of the distributing cylinder (223) is provided with an isolation layer to reduce centrifugal impact. The surfaces of the compartment plates (224) that contact the powder are all set as inclined surfaces, and the outer surface of the distributing cylinder (223) is provided with a discharge port (2231) for collecting powder on the inclined lower side of each compartment plate (224), and a closed door structure that can be manually opened and closed is provided at the port of the discharge port (2231).

9. A method for preparing graphene-aluminum alloy powder, characterized in that, The specific steps of using the graphene aluminum alloy powder preparation apparatus according to any one of claims 1-8 are as follows: S1. Start the main body (1) of the plasma atomizing powder making equipment to complete the initial preparation of graphene aluminum alloy powder. The atomized powder is collected by the fan-shaped groove of the powder seat (21) and the drive motor (211) in the powder seat (21) is started simultaneously. S2. The drive motor (211) drives the top cam (215) and each screw through the first bevel gear set (212) and the second bevel gear set (213). The powder is collected at the discharge port (2161) and then conveyed by the first conveying screw (214). It is then sprayed along the feed pipe (225) to the tail position of the plasma torch system through the second conveying screw (2251) in conjunction with the powder spraying pump body (2252), thus completing the plasma shaping of the powder and the removal of defective particles. S3. After shaping, the powder enters the tail flow support (22) and is spirally conveyed downward by the centrifugal screw (222). The centrifugal force is used in conjunction with the centrifugal screen (221) to achieve powder classification and screening. After screening, the powder is thrown into the distribution cylinder (223) for temporary storage. S4. Close the main body (1) and drive motor (211) of the plasma atomizing powder making equipment, open the closed door structure of the discharge port (2231) of the distribution cylinder (223), and collect graphene aluminum alloy powder of different specifications from each discharge port (2231) through the guidance of the chamber plate (224).

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