Device for producing pre-alloyed powder of non-ferrous metals

Abstract

This invention relates to the field of metal powder production technology, and provides a non-ferrous metal pre-alloyed powder manufacturing apparatus, comprising: a cylinder, the inner wall of which is surrounded by jet pipes for impacting molten alloy with high-pressure airflow to break the molten alloy into fine alloy droplets; multiple jet pipes are arranged in groups of any two adjacent jet pipes, with the positional relationship between any two adjacent jet pipes being vertical; the jet pipes are supplied with inert gas for impact by an air supply component; and the bottom end of the cylinder is a cooling zone for cooling the freely falling alloy molten droplets into fine particles. By realizing real-time monitoring of the cooling zone temperature and adaptive adjustment of the jet pipe deployment state, when the cooling zone temperature is too high and hinders the solidification of the molten alloy droplets, the jet area is expanded to enhance heat dissipation capacity, solving the problems of insufficient cooling capacity or excessive energy consumption in traditional devices, and significantly improving the accuracy and response speed of temperature control.

Description

Technical Field

[0001] This invention relates to the field of metal powder production technology, specifically to an apparatus for manufacturing pre-alloyed powder of non-ferrous metals. Background Technology

[0002] In modern industrial production, gas atomization powder preparation technology plays a crucial role as a key powder preparation method, occupying an important position in the production of metal powders, alloy powders, and ceramic powders. This technology uses a high-speed gas flow to break up molten metal into tiny droplets, which then rapidly solidify in a cooling medium, ultimately forming spherical or near-spherical powder particles.

[0003] After prolonged operation, existing equipment generates high temperatures in the cooling area, causing the molten metal droplets to solidify ineffectively due to the small temperature difference between the droplets and the outside environment, thus affecting powder solidification. Furthermore, the jet pipes are typically designed with a fixed structure, preventing dynamic adjustment of the jet area based on the actual temperature of the cooling zone. This results in insufficient cooling efficiency at high temperatures and significant energy waste at low temperatures. Therefore, a non-ferrous metal pre-alloyed powder manufacturing device is needed. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a non-ferrous metal pre-alloyed powder manufacturing apparatus. This solves the problems of existing apparatuses generating high temperatures in the cooling area after prolonged operation, leading to reduced heat exchange efficiency of molten metal droplets due to the small temperature difference with the outside environment, hindering effective solidification and impacting powder solidification. Furthermore, the fixed design of the jet pipe prevents dynamic adjustment of the jet area based on the actual temperature of the cooling zone, resulting in insufficient cooling efficiency at high temperatures and significant energy waste at low temperatures.

[0005] To achieve the above objectives, the present invention provides the following technical solution: An apparatus for manufacturing non-ferrous metal pre-alloyed powder, comprising: The cylinder has multiple jet pipes arranged around its inner wall for impacting the molten alloy with high-pressure airflow to break it into fine droplets. Any two adjacent jet pipes form a group, and the positional relationship between any two adjacent jet pipes is vertical. The jet pipes are supplied with inert gas for impact by a gas supply assembly. The bottom of the cylinder is a cooling zone used to cool the freely falling molten alloy droplets into fine particles. The temperature of the cooling zone is monitored by a temperature measuring assembly. The outer shell has a transmission ring rotatably connected to its bottom side. The bottom inner circumference of the transmission ring is connected to multiple gears 2 through tooth meshing. The bottom side of the gears 2 is connected to the temperature measuring component to drive the transmission ring to rotate when the temperature in the cooling zone is too high, and trigger the unfolding component to unfold each group of jet pipes, thereby increasing the jet area of ​​each group of jet pipes. When the unfolding component moves, it will synchronously drive the air supply component through the hollow connecting rod to increase the air supply volume to adapt to the expansion of the jet area. A melting crucible is fixedly connected to the top of the cylinder. Inside the crucible, an electrode heating coil melts the metal raw material that is put in. The metal processing chamber separates the incompletely melted metal from the liquid metal to prevent solid metal from flowing into the cylinder. The bottom outlet of the melting crucible is guided and diverted by a liquid guide plate to distribute the liquid metal to the impact area composed of multiple sets of jet pipes. The feeding channel is fixedly connected to the bottom side of the cylinder. Its top end is an inverted cone shape for guiding the granular pre-alloy powder. The pre-alloy powder is guided to the screening component at the bottom of the feeding channel for screening. Qualified pre-alloy powder will be discharged through the discharge ports at both ends of the bottom side of the feeding channel, and unqualified pre-alloy powder will enter the return cylinder at one end of the feeding channel. The return cylinder is rotatably connected to an auger, so that the unqualified pre-alloy powder can be recycled back to the melting crucible by the auger driven by the motor for remelting. A sliding support frame has a lifting frame that slides vertically at its middle end. A splined shaft is rotatably connected to the bottom side of the lifting frame. The top side of the lifting frame is connected to a temperature measuring component via a traction sleeve. When the temperature measuring component detects that the temperature in the cooling zone is too high, it drives the lifting frame to move downward in coordination with the splined shaft, causing the splined shaft to engage with a rotating splined cylinder at the bottom of the sliding support frame. The bottom end of the splined cylinder is connected to a screening component, allowing power to be synchronously transmitted to the splined shaft. The splined shaft then drives an air jet component at the other end of the feeding channel to impact large metal powder particles in the screening area of ​​the screening component with airflow, preventing blockages in the screening component.

[0006] Preferably, the temperature measuring component includes multiple heat-conducting chambers, which are fixed around the outer wall of the cooling zone at the bottom of the melting crucible. Multiple heat-conducting fins are fixedly connected inside the heat-conducting chambers, allowing the high temperature of the cooling zone to be conducted through the fins to the water poured inside the heat-conducting chambers. The piston column that slides vertically at the top of the heat-conducting chambers is displaced by the water vapor produced after boiling. A lifting ring frame is fixedly connected to the top side of the multiple piston columns. A rotating rod is fixedly connected to the bottom side of the second gear. The bottom end of the rotating rod is connected to a first gear through two meshing bevel gears. One side of the first gear is rotatably connected to the melting crucible. Multiple racks that mesh with the first gear are fixedly connected to the top side of the lifting ring frame.

[0007] Preferably, the unfolding assembly includes a transmission frame that slides vertically inside the outer shell. The bottom end of the transmission frame is connected to the transmission groove on the outer wall of the transmission ring via a transmission protrusion. The top end of the transmission frame is rotatably connected to one end of a hollow connecting rod. The other end of the hollow connecting rod is rotatably connected to a traction frame. The traction frame slides horizontally with the outer shell. The traction frame is connected to a traction head via a guide groove and slides against one end of the traction head. The middle end of the traction head is rotatably connected to the inner wall of the outer shell.

[0008] Preferably, the top jet pipe is fixedly connected to the outer casing, and the bottom jet pipe is fixedly connected to the other end of the traction head.

[0009] Preferably, the gas supply assembly includes a valve cylinder fixedly connected to the top of the outer casing. The valve cylinder has two input ends, and both input ends are supplied with inert gas through a gas supply pipe connected to an external gas supply source. Inside the valve cylinder, a valve core slides vertically via a spring. The bottom end of the valve core is fitted into the hollow area of ​​the hollow connecting rod. The top end of the valve core is hollow and has two air inlets. The air outlet of the valve core is connected to the output end of the valve cylinder. The output end of the valve cylinder is connected to the jet pipe through a branch pipe.

[0010] Preferably, the metal processing chamber includes a barrier inner cylinder and an outlet inner cylinder located inside the melting crucible. The barrier inner cylinder has a flask-shaped structure that is narrower at the top and wider at the bottom. The interior of the melting crucible is divided into a melting chamber and a liquid storage chamber by the barrier inner cylinder. The volume at the bottom of the melting chamber between the barrier inner cylinder and the melting crucible is smaller than the volume at the top, so that the molten metal enters the liquid storage chamber and prevents large pieces from entering the liquid storage chamber prematurely. The outlet inner cylinder is fixedly connected to the bottom of the liquid storage chamber and is located on the top side of the liquid guide plate.

[0011] Preferably, the screening assembly includes a screening plate that slides horizontally at the bottom of the material feeding channel. A guide head is fixedly connected to one end of the screening plate, and a guide disc is rotatably connected to the bottom of the other end of the material feeding channel. A guide groove is provided on the top side of the guide disc, and the bottom side of the guide head abuts against the guide groove on the top side of the guide disc through a guide protrusion. A screening triangle is provided on the bottom side of the screening plate. The screening triangle is in the shape of a triangular prism with a hollow interior and a ramp for guiding materials. The top inclined surface of the screening triangle has screen holes with a smaller specification than the screening plate to screen the qualified pre-alloy powder into two batches. The guide disc is connected to the bottom end of the auger and the bottom end of the splined cylinder through two sets of synchronous belts and synchronous pulleys, respectively.

[0012] Preferably, the jet assembly includes a guide roller rotatably connected to the top of the other end of the feeding channel. The outer wall of the guide roller is fitted with a guide ring, and the inner wall of the guide ring abuts against the guide groove on the outer wall of the guide roller through a guide protrusion. The bottom side of the guide roller has a translation frame connected to a connecting rod. The translation frame slides horizontally with the feeding channel, and a piston cylinder is provided on the bottom side. The piston pull-out part of the piston cylinder is fixedly connected to the translation frame. The output end of the piston cylinder is connected to an air impact pipe through a pipe. The air impact pipe is fixedly connected inside the feeding channel. A filter screen is installed at the input end of the piston cylinder to prevent dust blockage.

[0013] Preferably, the top end of the lifting frame is connected to one end of the lifting ring frame via a connecting rod, and the bottom end of the lifting frame is connected to the top side of the lifting frame via a connecting rod.

[0014] Preferably, it also includes an agitator roller, which is rotatably connected inside the liquid storage chamber, and the top side of the agitator roller is connected to the top side of the auger via a synchronous pulley and synchronous belt.

[0015] Working principle: The metal to be melted is put into the melting crucible. Large pieces of metal melt under the action of electrode heating coils and enter the storage chamber from the melting chamber through the inner cylinder. Unmelted metal remains in the melting chamber. The molten metal entering the storage chamber is stirred by the rotating stirring roller and mixed to form an alloy molten liquid. When the alloy molten liquid accumulates to a certain height, it passes through the inlet on the top side of the outlet inner cylinder and through the outlet on the bottom side of the melting crucible. Under the liquid distribution action of the liquid guide plate, it is dispersed into the impact area surrounded by multiple jet pipes, causing the alloy molten liquid to be dispersed into small droplets. Under the action of gravity, the droplets fall freely and dissipate heat to the outside during sufficient free fall, condensing and solidifying into pre-alloyed powder, which falls into the inside of the feeding channel. The motor drives the auger to rotate, and the auger drives the guide disc to rotate through the synchronous belt and synchronous pulley. The rotating guide disc guides the guide head connected to the screening plate to move back and forth through the guide groove, so that the pre-alloy powder falling on the screening plate is vibrated and screened. The qualified pre-alloy powder falls onto the screening triangle on the bottom side and is screened and separated along the two slopes of the screening triangle to obtain two specifications of qualified pre-alloy powder. The unqualified pre-alloy powder is guided to the return cylinder along the slope of the screening plate, and the large particles of unqualified pre-alloy powder inside the return cylinder are guided to the interior of the melting crucible for return to the furnace. During prolonged operation, the bottom of the cylinder, which should be a cooling zone where the molten alloy droplets completely solidify during their fall, will be heated by the heat released during the solidification process. This prevents the molten alloy droplets from completely releasing heat as they pass through this area, resulting in a solid-liquid coexistence state. Furthermore, due to their high density, the molten alloy droplets collide and combine, producing more unqualified pre-alloyed powder with large particle sizes. At this point, the heat at the bottom of the cylinder will be transferred to the heat conduction chamber on its outer wall and then conducted to the pure water inside through the fins, causing the pure water to boil and generate steam. This steam will lift the piston column connected to the lifting ring frame, causing the lifting ring frame to drive the rack and traction sleeve to move. The displaced rack rotates the meshing gear one, causing gear one to rotate through two meshing bevel gear transmission rods. This causes gear two at the top of the transmission rods to mesh with the transmission ring, thus causing the transmission frame to rotate. As the transmission frame descends, it pulls the hollow connecting rod, causing its angle to change and pulling the traction frame to move. This causes the guide groove on the traction frame to guide one end of the traction head, causing it to rotate. This causes one end of the traction head to tilt up, driving the jet pipe at the other end to descend. This expands the impact area of ​​each set of jet pipes, forming impact areas at both ends. The top impact area is responsible for impacting and dispersing the molten alloy, while the bottom impact area is responsible for impacting and dispersing the re-condensed molten alloy. The high-speed gas carries away the heat from the molten alloy droplets, thus cooling the liquid. As the angle of the hollowed-out connecting rod changes, it will also cause the valve core on the top side to shift, thereby changing the original one air inlet of the valve core that coincides with the valve cylinder to two air inlets that coincide. In addition, the overlap between the air outlet of the valve core and the output port of the valve cylinder will increase, thereby increasing the flow rate of the gas channel and increasing the output of inert gas to the jet pipe to adapt to the expansion of the impact area. The lifting ring frame is pulled by a connecting rod to the bottom traction sleeve, which in turn pushes the lifting frame downwards. This causes the spline shaft at the bottom of the lifting frame to pass through the guide roller and insert into the spline cylinder on the bottom side. The spline tooth density on the inner wall of the spline cylinder is greater than that of the spline shaft, allowing the spline shaft to be inserted in any direction. The power obtained by the spline cylinder through the synchronous pulley and synchronous belt is transmitted to the guide roller through the spline shaft. The guide roller drives the guide ring to move up and down reciprocally through the guide groove with a closed surface path. This causes the guide ring to push and pull the translation frame reciprocally through the connecting rod. The translation frame pulls the piston pulling part of the piston cylinder to move, causing the piston cylinder to continuously draw air to the outside and output the gas to the air impact pipe. The air impact pipe then impacts the screen part of the screening plate directly in front of the middle of the guide roller through the outlet of the air impact pipe. This allows large alloy particles that unfortunately fall into the screen to roll into the return cylinder in time, and removes large alloy particles stuck in the screen from the screening plate by impact, preventing blockage. When the temperature returns to normal, the aforementioned structure for dealing with high-temperature phenomena will be reset and restored.

[0016] This invention provides an apparatus for manufacturing non-ferrous metal pre-alloyed powder. It has the following beneficial effects: 1. This invention achieves real-time monitoring of the cooling zone temperature and adaptive adjustment of the jet pipe deployment state. When the cooling zone temperature is too high and hinders the solidification of molten alloy droplets, the jet area is expanded to enhance heat dissipation capacity. This solves the problems of insufficient cooling capacity or excessive energy consumption of traditional devices and significantly improves the accuracy and response speed of temperature control.

[0017] 2. This invention achieves automatic matching between the expansion of the jet area and the increase in the gas supply, so that the number of air inlets and the overlap of the air outlets increase synchronously, ensuring that the gas channel flow rate is adapted to the expanded jet area, avoiding the lag and uncertainty of manual adjustment, maintaining stable gas impact pressure and atomization effect, ensuring the sphericity and particle size consistency of powder particles, and improving the product quality of pre-alloyed powder.

[0018] 3. This invention achieves effective separation of incompletely melted metal and liquid metal. By blocking solid metal particles at the top due to differences in density and size, it prevents them from flowing into the cylinder in advance and causing blockage of the jet pipe or uneven atomization, thus ensuring the stability and continuity of the atomization process.

[0019] 4. This invention achieves the dual functions of screening anti-clogging and efficient recovery of large particles. By timely blowing away large alloy particles stuck in the screen mesh, the screen holes are prevented from being blocked and affecting the screening efficiency. In conjunction with the auger return mechanism, unqualified powder is automatically transported back to the melting crucible for remelting. This integrated anti-clogging and recovery design ensures the continuous smoothness of the screening process. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the structure of the cylindrical body of the present invention; Figure 3 This is a schematic diagram of the structure of the melting crucible of the present invention; Figure 4 This is a schematic diagram of the liquid guiding plate of the present invention; Figure 5 This is a schematic diagram showing the position of the liquid guiding plate of the present invention; Figure 6 This is a schematic diagram of the outer shell of the present invention; Figure 7 This is a schematic diagram of the hollowed-out connecting rod of the present invention; Figure 8 This is a schematic diagram of the traction frame of the present invention; Figure 9 This is a schematic diagram of the valve cylinder connection mechanism of the present invention; Figure 10 This is a schematic diagram of the valve core structure of the present invention; Figure 11 This is a schematic diagram showing the position of the rotating rod in this invention; Figure 12 This is a schematic diagram of the rotating rod of the present invention; Figure 13 This is a schematic diagram of the connection structure of the heat-conducting chamber of the present invention; Figure 14 This is a schematic diagram of the internal structure of the feeding channel of the present invention; Figure 15 This is a schematic diagram of the structure of the screening triangle of the present invention; Figure 16 This is a schematic diagram of the structure of the guide disk of the present invention; Figure 17 This is a schematic diagram showing the position of the spline shaft of the present invention; Figure 18 This is a schematic diagram of the connection structure of the translation frame of the present invention; Figure 19 This is a schematic diagram of the structure of the guide roller of the present invention; Figure 20 This is a schematic diagram showing the location of the storage port of the return cylinder of the present invention.

[0021] The components are as follows: 1. Cylinder; 2. Melting crucible; 3. Feeding channel; 4. Inner barrier cylinder; 5. Liquid outlet cylinder; 6. Liquid guide plate; 7. Stirring roller; 8. Outer shell; 9. Transmission ring; 10. Transmission frame; 11. Hollowed-out connecting rod; 12. Pulling frame; 13. Pulling head; 14. Jet pipe; 15. Valve cylinder; 16. Valve core; 17. Air supply pipe; 18. Rotating rod; 19. Gear 1; 20. Rack; 21. Gear 2 22. Heat conduction chamber; 23. Piston column; 24. Lifting ring frame; 25. Screening plate; 26. Screening triangle frame; 27. Guide plate; 28. Guide head; 29. ​​Splined cylinder; 30. Sliding support frame; 31. Driving sleeve; 32. Splined shaft; 33. Guide roller; 34. Guide ring; 35. Translation frame; 36. Piston cylinder; 37. Air impact pipe; 38. Return cylinder; 39. Screw; 40. Lifting frame. Detailed Implementation

[0022] 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.

[0023] Example: This invention provides an apparatus for manufacturing non-ferrous metal pre-alloyed powder, comprising: Please see the appendix Figure 1 Appendix Figure 2 and attached Figure 5 The inner wall of the cylinder 1 is surrounded by jet pipes 14 for impacting the molten alloy with high-pressure airflow, forming an impact zone to impact the molten alloy into fine molten alloy droplets. There are multiple jet pipes 14, with any two adjacent jet pipes 14 forming a group, and the positional relationship between any two adjacent jet pipes 14 is vertical. The jet pipes 14 are supplied with inert gas for impact by the gas supply component. The bottom end of the cylinder 1 is a cooling zone, which is used to cool the freely falling molten alloy droplets into fine particles. The temperature of the cooling zone is monitored by a temperature measuring component. Specifically, this equipment is equipped with safety protection measures that meet national standards, and possesses the ability to melt the required metals and maintain a suitable temperature to stably melt the metal into a liquid state. This liquid metal then fuses with other liquid metals to form a specified alloy molten liquid, thereby producing the required non-ferrous metal pre-alloy powder. Argon and nitrogen are used as the inert gases, ensuring that the impacted alloy molten liquid is broken into tiny droplets without reacting with the gases. After falling into the impact zone, the alloy molten liquid is dispersed into small droplets, which then fall freely under gravity. During this sufficient free fall, they dissipate heat, condense, and solidify into pre-alloy powder, which falls into the feed channel 3. Please see the appendix Figure 11 - Appendix Figure 13 The temperature measuring component includes multiple heat-conducting chambers 22, which are fixed around the outer wall of the cooling zone at the bottom of the melting crucible 2. Multiple heat-conducting fins are fixedly connected inside the heat-conducting chambers 22, allowing the high temperature of the cooling zone to be conducted to the water poured inside the heat-conducting chambers 22 through the fins. The piston column 23, which slides vertically at the top of the heat-conducting chamber 22, is pushed up by the water vapor produced after boiling. A lifting ring frame 24 is fixedly connected to the top side of the multiple piston columns 23. A rotating rod 18 is fixedly connected to the bottom side of the gear 21. The bottom end of the rotating rod 18 is connected to a gear 19 through two meshing bevel gears. One side of the gear 19 is rotatably connected to the melting crucible 2. Multiple racks 20 that mesh with the gear 19 are fixedly connected to the top side of the lifting ring frame 24. Specifically, during prolonged operation, the bottom of the cylinder 1, which should be a cooling zone where the molten alloy completely solidifies during its descent, will be heated by the heat released during the solidification of the molten alloy droplets. This prevents the droplets from completely releasing heat as they pass through this area, resulting in a solid-liquid coexistence state. Furthermore, due to their high density, the molten alloy droplets collide and combine, producing more unqualified pre-alloyed powder with large particle sizes. At this time, the heat at the bottom of the cylinder 1 will be transferred to the heat conduction chamber 22 on its outer wall and conducted to the pure water inside through the fins, causing the pure water to boil and generate steam. This steam will lift the piston column 23 connected to the lifting ring frame 24, causing the lifting ring frame 24 to drive the rack 20 and the traction sleeve 31 to move.

[0024] Please see the appendix Figure 6 - Appendix Figure 8 The outer casing 8 has a transmission ring 9 rotatably connected to its bottom side. Multiple gears 21 are connected to the inner circumference of the bottom end of the transmission ring 9 via toothed meshing. The bottom side of each gear 21 is connected to a temperature sensing component. When the temperature in the cooling zone is too high, the transmission ring 9 is driven to rotate, triggering the deployment component to deploy each set of jet pipes 14, thus increasing the jet area of ​​each set of jet pipes 14. During movement, the deployment component synchronously drives the air supply component via a hollow connecting rod 11 to increase the air supply volume, adapting to the increased jet area. The deployment component includes a transmission frame 10 that slides vertically inside the outer casing 8. The bottom end is connected to the transmission groove on the outer wall of the transmission ring 9 through the transmission protrusion. The top end of the transmission frame 10 is rotatably connected to one end of the hollow connecting rod 11. The other end of the hollow connecting rod 11 is rotatably connected to the traction frame 12. The traction frame 12 slides horizontally with the outer shell 8. The traction frame 12 is connected to the traction head 13 through the guide groove and slides against one end of the traction head 13. The middle end of the traction head 13 is rotatably connected to the inner wall of the outer shell 8. The top jet pipe 14 is fixedly connected to the outer shell 8. The bottom jet pipe 14 is fixedly connected to the other end of the traction head 13. Specifically, the displaced rack 20 rotates the meshing gear 19, causing the gear 19 to rotate through two meshing bevel gear transmission rods 18. This causes the gear 21 at the top of the transmission rods 18 to mesh with the transmission ring 9, causing it to rotate. This, in turn, causes the guide groove on the transmission ring 9 to guide the transmission frame 10 to move. As the transmission frame 10 descends, it pulls the hollow connecting rod 11, causing its angle to change and pulling the traction frame 12 to move. This causes the guide groove on the traction frame 12 to guide one end of the traction head 13 to rotate, causing one end of the traction head 13 to tilt upwards and drive the jet pipe 14 at the other end to descend. This expands the impact area of ​​each set of jet pipes 14, forming impact areas at both ends. The top impact area is responsible for impacting and dispersing the molten alloy, while the bottom impact area is responsible for impacting and dispersing the re-condensed molten alloy. The high-speed gas carries away the heat from the molten alloy droplets, thus cooling the liquid.

[0025] Please see the appendix Figure 8 - Appendix Figure 10 The gas supply assembly includes a valve cylinder 15 fixedly connected to the top of the outer casing 8. The valve cylinder 15 has two input ends, and both input ends of the valve cylinder 15 are supplied with inert gas through a gas supply pipe 17 connected to an external gas supply source. A valve core 16 slides vertically inside the valve cylinder 15 via a spring. The bottom end of the valve core 16 is fitted into the hollow area of ​​the hollow connecting rod 11. The top end of the valve core 16 is hollow and has two air inlets. The air outlet of the valve core 16 is connected to the output end of the valve cylinder 15. The output end of the valve cylinder 15 is connected to the jet pipe 14 through a branch pipe. Specifically, as the angle of the hollow connecting rod 11 changes, it will also cause the valve core 16 on the top side to shift, thereby changing the original one air inlet of the valve core 16 that coincided with the valve cylinder 15 into two air inlets that coincide. In addition, the overlap between the air outlet of the valve core 16 and the output port of the valve cylinder 15 will increase, thereby increasing the flow rate of the gas channel and increasing the output of inert gas to the jet pipe 14 to adapt to the expansion of the impact area.

[0026] Please see the appendix Figure 3 Appendix Figure 4 and attached Figure 20 The melting crucible 2 is fixedly connected to the top of the cylinder 1. Inside, an electrode heating coil melts the metal raw material. An incompletely melted metal is separated from the liquid metal through a metal processing chamber to prevent solid metal from flowing into the cylinder 1. The bottom outlet of the melting crucible 2 is guided and diverted by a liquid guide plate 6, distributing the liquid metal to an impact zone composed of multiple sets of jet pipes 14. The metal processing chamber includes a barrier inner cylinder 4 and a liquid outlet inner cylinder 5 located inside the melting crucible 2. The inner cylinder 4 is shaped like a flask with a narrow top and a wide bottom. The interior of the melting crucible 2 is divided into a melting chamber and a liquid storage chamber by the inner cylinder 4. The volume at the bottom of the melting chamber between the inner cylinder 4 and the melting crucible 2 is smaller than the volume at the top, so that the molten metal enters the liquid storage chamber and prevents large pieces from entering the liquid storage chamber in advance. The liquid outlet cylinder 5 is fixedly connected to the bottom of the liquid storage chamber and is located on the top side of the liquid guide plate 6. The top side of the stirring roller 7, which is rotatably connected inside the liquid storage chamber, is connected to the top side of the auger 39 through a synchronous pulley and synchronous belt. Specifically, the top of the melting crucible 2 is equipped with a furnace lid for heat preservation and sealing to prevent heat loss and reduce the influence of external oxygen on the internal alloy molten liquid. The metal to be melted is put into the interior of the melting crucible 2. Large pieces of metal melt under the action of the electrode heating coil and enter the liquid storage chamber from the melting chamber through the barrier inner cylinder 4. Unmelted metal remains in the melting chamber. The molten metal entering the liquid storage chamber is stirred by the rotating stirring roller 7 and mixed to form an alloy molten liquid. When the alloy molten liquid accumulates to a certain height, it passes through the inlet on the top side of the liquid outlet inner cylinder 5 and through the outlet on the bottom side of the melting crucible 2. Under the liquid distribution action of the liquid guide plate 6, it is dispersed into the impact area surrounded by multiple jet pipes 14.

[0027] Please see the appendix Figure 14 - Appendix Figure 16 The feeding channel 3 is fixedly connected to the bottom side of the cylinder 1. Its top end is an inverted cone shape to guide the granular pre-alloyed powder. The pre-alloyed powder is guided to the screening component at the bottom of the feeding channel 3 for screening. Qualified pre-alloyed powder will exit through the discharge ports at both ends of the bottom side of the feeding channel 3. Unqualified pre-alloyed powder will enter the return cylinder 38 at one end of the feeding channel 3. An auger 39 is rotatably connected inside the return cylinder 38. Driven by a motor, the auger 39 collects the unqualified pre-alloyed powder back into the melting crucible 2 for remelting. The screening component includes a screening plate 25 that slides horizontally at the bottom of the feeding channel 3. One end is fixedly connected to a guide head 28, and the other end of the feeding channel 3 is rotatably connected to a guide plate 27. The top side of the guide plate 27 is provided with a guide groove. The bottom side of the guide head 28 abuts against the guide groove on the top side of the guide plate 27 through a guide protrusion. The bottom side of the screening plate 25 is provided with a screening triangle 26. The overall shape of the screening triangle 26 is a triangular prism with a hollow interior and a ramp for guiding materials. The top side of the screening triangle 26 has a screen hole with a smaller specification than the screening plate 25 to screen the qualified pre-alloy powder into two batches. The guide plate 27 is connected to the bottom end of the auger 39 and the bottom end of the splined cylinder 29 through two sets of synchronous belts and synchronous pulleys respectively. Specifically, the machine drives the auger 39 to rotate, and the auger 39 drives the guide disc 27 to rotate via the synchronous belt and synchronous pulley. The rotating guide disc 27 guides the guide head 28 connected to the screening plate 25 to move back and forth through the guide groove, so that the pre-alloy powder falling on the screening plate 25 is vibrated and screened. The qualified pre-alloy powder falls onto the screening triangle 26 on the bottom side and is screened and separated along the two slopes of the screening triangle 26 to obtain two specifications of qualified pre-alloy powder. The unqualified pre-alloy powder is guided along the slope of the screening plate 25 to the return cylinder 38, and together with the rotating auger 39 inside the return cylinder 38, the unqualified large particles of pre-alloy powder are guided into the melting crucible 2 for remelting.

[0028] Please see the appendix Figure 17 - Appendix Figure 19 A sliding support frame 30 has a vertically sliding lifting frame 40 at its middle end. A splined shaft 32 is rotatably connected to the bottom side of the lifting frame 40. The top side of the lifting frame 40 is connected to a temperature sensing component via a traction sleeve 31. When the temperature sensing component detects that the cooling zone temperature is too high, it drives the lifting frame 40 to move downwards in conjunction with the splined shaft 32, causing the splined shaft 32 to engage with a rotating splined cylinder 29 at the bottom of the sliding support frame 30. The bottom end of the splined cylinder 29 is connected to a screening component, allowing power to be synchronously transmitted to the splined shaft 32. This causes the splined shaft 32 to drive an air jet assembly at the other end of the feeding channel 3, impacting large metal powder particles in the screening area of ​​the screening component with airflow to prevent blockage. The air jet assembly includes components rotatably connected to the top of the other end of the feeding channel 3. The guide roller 33 of the part is fitted with a guide ring 34 on its outer wall. The inner wall of the guide ring 34 abuts against the guide groove on the outer wall of the guide roller 33 through the guide protrusion. The bottom side of the guide roller 33 is connected to a translation frame 35 through a connecting rod. The translation frame 35 slides horizontally with the feeding channel 3. A piston cylinder 36 is provided on the bottom side. The piston pull-out part of the piston cylinder 36 is fixedly connected to the translation frame 35. The output end of the piston cylinder 36 is connected to an air impact pipe 37 through a pipe. The air impact pipe 37 is fixedly connected inside the feeding channel 3. A filter screen is installed at the input end of the piston cylinder 36 to prevent dust blockage. The top end of the lifting frame 40 is connected to one end of the lifting ring frame 24 through a connecting rod. The bottom end of the lifting frame 40 is connected to the top side of the lifting frame 40 through a connecting rod. Specifically, the lifting ring frame 24 pulls the bottom traction sleeve 31 via a connecting rod, causing the traction sleeve 31 to push the bottom lifting frame 40 downward via the connecting rod. This causes the spline shaft 32 at the bottom of the lifting frame 40 to pass through the guide roller 33 and insert into the spline cylinder 29 on the bottom side. The spline tooth density on the inner wall of the spline cylinder 29 is greater than that of the spline shaft 32, allowing the spline shaft 32 to be inserted in any direction. The power obtained by the spline cylinder 29 through the synchronous pulley and synchronous belt is transmitted to the guide roller 33 through the spline shaft 32. The guide roller 33 drives the guide ring 3 through the guide groove with closed surface path. 4. The guide ring 34 is reciprocated up and down, causing the guide ring 34 to push and pull the translation frame 35 through the connecting rod. The translation frame 35 drives the piston pulling part of the piston cylinder 36 to move, causing the piston cylinder 36 to continuously draw air to the outside and output the gas to the air impact pipe 37. The gas impacts the screen part of the screen plate 25 directly in front of the guide roller 33 through the output port of the air impact pipe 37, so that large alloy particles that unfortunately fall into it can roll into the return cylinder 38 in time. The large alloy particles stuck in the screen are also removed from the screen plate 25 by impact, preventing blockage.

[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 which is defined by the appended claims and their equivalents.

Claims

1. A non-ferrous metal pre-alloyed powder manufacturing apparatus, characterized in that, include: The inner wall of the cylinder (1) is surrounded by jet pipes (14) for impacting the molten alloy with high-pressure airflow to break the molten alloy into fine molten alloy droplets. There are multiple jet pipes (14), any two adjacent jet pipes (14) form a group, and the positional relationship between any two adjacent jet pipes (14) is vertical. The jet pipes (14) are supplied with inert gas for impact by the gas supply assembly. The bottom end of the cylinder (1) is a cooling zone, which is used to cool the freely falling molten alloy droplets into fine particles. The temperature of the cooling zone is monitored by the temperature measuring assembly. The outer shell (8) has a transmission ring (9) rotatably connected to its bottom side. The inner circumference of the bottom end of the transmission ring (9) is connected to multiple gears (21) through tooth meshing. The bottom side of the gears (21) is connected to the temperature measuring component to drive the transmission ring (9) to rotate when the temperature in the cooling zone is too high, and trigger the unfolding component to unfold each group of jet pipes (14) so ​​that each group of jet pipes (14) expands the jet area. When the unfolding component moves, it will synchronously drive the air supply component through the hollow connecting rod (11) to increase the air supply volume to adapt to the expansion of the jet area. The melting crucible (2) is fixedly connected to the top of the cylinder (1). The metal raw material inside is melted by the electrode heating coil. The incompletely melted metal and liquid metal are separated by the metal processing chamber to prevent solid metal from flowing into the cylinder (1). The bottom outlet of the melting crucible (2) is guided and diverted by the liquid guide plate (6) to distribute the liquid metal to the impact area composed of multiple sets of jet pipes (14). The feeding channel (3) is fixedly connected to the bottom side of the cylinder (1). Its top end is an inverted cone shape for guiding the granular pre-alloy powder. The pre-alloy powder is guided to the screening component at the bottom of the feeding channel (3) for screening. Qualified pre-alloy powder will be discharged through the discharge ports at both ends of the bottom side of the feeding channel (3). Unqualified pre-alloy powder will enter the return cylinder (38) at one end of the feeding channel (3). The return cylinder (38) is rotatably connected to an auger (39) so that the unqualified pre-alloy powder can be recycled into the melting crucible (2) by the auger (39) driven by the motor for remelting. A sliding support frame (30) has a vertically sliding lifting frame (40) at its middle end. A spline shaft (32) is rotatably connected to the bottom side of the lifting frame (40). The top side of the lifting frame (40) is connected to the temperature measuring component through a traction sleeve (31). When the temperature measuring component detects that the temperature of the cooling zone is too high, it drives the lifting frame (40) to move downward in coordination with the spline shaft (32). The spline shaft (32) is inserted into the spline cylinder (29) that rotates at the bottom end of the sliding support frame (30). The bottom end of the spline cylinder (29) is connected to the screening component, so that the power is synchronously transmitted to the spline shaft (32). The spline shaft (32) drives the jet component at the other end of the feeding channel (3) to impact the large metal powder particles on the screening area of ​​the screening component with airflow, so as to prevent blockage on the screening component.

2. The non-ferrous metal pre-alloyed powder manufacturing apparatus according to claim 1, characterized in that, The temperature measuring component includes multiple heat-conducting chambers (22). The heat-conducting chambers (22) are fixed around the outer wall of the cooling zone at the bottom of the melting crucible (2). Multiple heat-conducting fins are fixedly connected inside the heat-conducting chambers (22), so that the high temperature of the cooling zone is conducted through the fins to the water poured into the heat-conducting chambers (22). The piston column (23) that slides vertically at the top of the heat-conducting chamber (22) is subjected to the action of the water vapor produced after boiling, and is displaced upward. The top side of the multiple piston columns (23) is fixedly connected to a lifting ring frame (24). The bottom side of the gear two (21) is fixedly connected to a rotating rod (18). The bottom end of the rotating rod (18) is connected to a gear one (19) through two meshing bevel gears. One side of the gear one (19) is rotatably connected to the melting crucible (2). The top side of the lifting ring frame (24) is fixedly connected to multiple racks (20) that mesh with the gear one (19).

3. The non-ferrous metal pre-alloy powder manufacturing apparatus according to claim 1, characterized in that, The unfolding assembly includes a transmission frame (10) that slides vertically inside the outer shell (8). The bottom end of the transmission frame (10) is connected to the transmission groove on the outer wall of the transmission ring (9) through a transmission protrusion. The top end of the transmission frame (10) is rotatably connected to one end of a hollow connecting rod (11). The other end of the hollow connecting rod (11) is rotatably connected to a traction frame (12). The traction frame (12) slides horizontally with the outer shell (8). The traction frame (12) is connected to a traction head (13) through a guide groove and slides against one end of the traction head (13). The middle end of the traction head (13) is rotatably connected to the inner wall of the outer shell (8).

4. The non-ferrous metal pre-alloyed powder manufacturing apparatus according to claim 3, characterized in that, The top jet pipe (14) is fixedly connected to the outer shell (8), and the bottom jet pipe (14) is fixedly connected to the other end of the traction head (13).

5. The non-ferrous metal pre-alloyed powder manufacturing apparatus according to claim 1, characterized in that, The gas supply assembly includes a valve cylinder (15) fixedly connected to the top of the outer shell (8). The valve cylinder (15) has two input ends. Both input ends of the valve cylinder (15) are supplied with inert gas through a gas supply pipe (17) connected to an external gas supply source. A valve core (16) slides vertically inside the valve cylinder (15) through a spring. The bottom end of the valve core (16) is fitted into the hollow area of ​​the hollow connecting rod (11). The top end of the valve core (16) is hollow and has two air inlets. The air outlet of the valve core (16) is connected to the output end of the valve cylinder (15). The output end of the valve cylinder (15) is connected to the jet pipe (14) through a branch pipe.

6. The non-ferrous metal pre-alloyed powder manufacturing apparatus according to claim 1, characterized in that, The metal processing chamber includes a barrier inner cylinder (4) and an outlet inner cylinder (5) located inside the melting crucible (2). The barrier inner cylinder (4) is shaped like a flask with a narrow top and a wide bottom. The interior of the melting crucible (2) is divided into a melting chamber and a liquid storage chamber by the barrier inner cylinder (4). The volume at the bottom of the melting chamber between the barrier inner cylinder (4) and the melting crucible (2) is smaller than the volume at the top, so that the molten metal enters the liquid storage chamber and prevents large pieces from entering the liquid storage chamber prematurely. The outlet inner cylinder (5) is fixedly connected to the bottom of the liquid storage chamber and is located on the top side of the liquid guide plate (6).

7. The non-ferrous metal pre-alloyed powder manufacturing apparatus according to claim 1, characterized in that, The screening assembly includes a screening plate (25) that slides horizontally at the bottom of the material feeding channel (3). One end of the screening plate (25) is fixedly connected to a guide head (28), and the bottom of the other end of the material feeding channel (3) is rotatably connected to a guide disc (27). The top side of the guide disc (27) is provided with a guide groove. The bottom side of the guide head (28) abuts against the guide groove on the top side of the guide disc (27) through a guide protrusion. The bottom side of the screening plate (25) is provided with a screening triangle (26). The overall shape of the screening triangle (26) is a triangular prism with a hollow interior and a ramp for guiding materials. The top inclined surface of the screening triangle (26) is provided with a screen hole with a smaller specification than that of the screening plate (25) to screen the qualified pre-alloy powder into two batches. The guide disc (27) is connected to the bottom end of the auger (39) and the bottom end of the splined cylinder (29) through two sets of synchronous belts and synchronous pulleys, respectively.

8. The non-ferrous metal pre-alloyed powder manufacturing apparatus according to claim 1, characterized in that, The jet assembly includes a guide roller (33) rotatably connected to the top of the other end of the feeding channel (3). The outer wall of the guide roller (33) is fitted with a guide ring (34). The inner wall of the guide ring (34) abuts against the guide groove of the outer wall of the guide roller (33) through a guide protrusion. The bottom side of the guide roller (33) is connected to a translation frame (35) via a connecting rod. The translation frame (35) slides horizontally with the feeding channel (3) and a piston cylinder (36) is provided on the bottom side. The piston pull-out part of the piston cylinder (36) is fixedly connected to the translation frame (35). The output end of the piston cylinder (36) is connected to an air impact pipe (37) through a pipe. The air impact pipe (37) is fixedly connected inside the feeding channel (3). The input end of the piston cylinder (36) is equipped with a filter screen to prevent dust blockage.

9. The non-ferrous metal pre-alloy powder manufacturing apparatus according to claim 2, characterized in that, The top end of the lifting frame (40) is connected to one end of the lifting ring frame (24) via a connecting rod, and the bottom end of the lifting frame (40) is connected to the top side of the lifting frame (40) via a connecting rod.

10. The apparatus for manufacturing non-ferrous metal pre-alloyed powder according to claim 6, characterized in that, It also includes an agitator roller (7), which is rotatably connected inside the liquid storage chamber. The top side of the agitator roller (7) is connected to the top side of the auger (39) via a synchronous pulley and synchronous belt.

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