Gas atomization device and method for producing titanium metal powder

Abstract

The application discloses a kind of gas atomization device and preparation method of titanium metal powder, it is related to gas atomization powder technology field, to solve the technical problem of not flexible titanium metal powder gas atomization device, including tower mounting frame with stairs, atomization tank, atomization mechanism, isolation injection assembly and drainage injection assembly, the present application is realized by the collaborative design of isolation and drainage injection assembly, the multifunctional optimization of powder preparation process;Two groups of atomization spray gun can switch between arc gathering and annular array state, corresponding two powder preparation modes of collision and non-collision;Under non-collision mode, annular array gun head is combined with tank wall insulation layer, so that atomization gas is evenly distributed, and high-quality powder with small particle size and high sphericity is prepared;Collision mode removes impurities and breaks large particles through secondary atomization and tank wall collision, and improves powder bulk density and uniformity;The device also has automatic cleaning function, and the gas flow of jet flow port cleans tank wall impurities, to realize the high-quality production of titanium metal powder.

Description

Technical Field

[0001] This invention relates to the field of gas atomization powder preparation technology, and more specifically, to a gas atomization device and preparation method for titanium metal powder. Background Technology

[0002] Existing technologies have several unresolved issues. From the perspective of powder quality control, traditional gas atomization devices struggle to precisely control the interaction between the powder and the inner wall of the atomizing can: when the powder collides with the can wall, the particles are prone to deformation and breakage, and impurities can be mixed into the surface due to can wall wear, resulting in reduced powder purity and uneven particle size distribution. In non-collision conditions, there are generally problems with disordered atomization gas distribution and unstable droplet solidification processes, making it difficult to obtain high-quality powder with fine particle size and high sphericity, which cannot meet the stringent requirements of aerospace, high-end equipment manufacturing, and other fields for high-performance titanium metal powder.

[0003] Regarding equipment operation and maintenance, existing devices lack effective powder management and equipment protection mechanisms. Powder easily accumulates on the tank walls and other parts, affecting normal equipment operation and requiring frequent shutdowns for cleaning, thus reducing production efficiency. Simultaneously, the continuous erosion and wear of the tank walls and internal components by the powder significantly shortens the equipment's lifespan and substantially increases maintenance and replacement costs. Furthermore, traditional devices have fixed atomizing gun layouts and spray patterns, making it difficult to flexibly adjust atomization parameters, resulting in low atomization efficiency and high energy consumption, hindering efficient and stable production. Therefore, we propose a gas atomization device and preparation method for titanium metal powder. Summary of the Invention

[0004] The purpose of this invention is to provide a gas atomization device and preparation method for titanium metal powder, so as to solve the technical problem of inflexible gas atomization device for titanium metal powder.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a gas atomization device for titanium metal powder, comprising a tower-type mounting frame with stairs, an atomizing tank, an atomizing mechanism, an isolation spray assembly, and a diversion spray assembly. The isolation spray assembly includes a plurality of first atomizing spray guns that can be arranged in an arc or a ring array, and each first atomizing spray gun has two atomizing nozzles fixedly connected to its bottom. The diversion spray assembly includes a plurality of second atomizing spray guns located above the first atomizing spray guns that can be arranged in an arc or a ring array. Each second atomizing spray gun has a main spray nozzle at its output end and a secondary spray nozzle on the surface of its output end.

[0006] When several first atomizing spray guns and several second atomizing spray guns converge in an arc, the first atomizing spray guns and the second atomizing spray guns are in a horizontal state. The output end of the first atomizing spray gun is in communication with the atomizing nozzle, and the spray nozzle is in communication with the secondary spray nozzle. The droplets are atomized laterally. The powder collides with the inner wall of the atomizing tank. A pressure difference is formed between the air spray through the secondary spray nozzle and the lateral air spray, which can guide the direction of powder movement.

[0007] When several first atomizing spray guns and several second atomizing spray guns are distributed in a ring at equal intervals, the output ends of the first atomizing spray guns are tilted upwards, and the output ends of the second atomizing spray guns are tilted downwards. This causes the output ends of the first atomizing spray guns to be blocked, while the atomizing nozzles and the main spray nozzles are open, but the secondary spray nozzles are blocked. The flowing gas at the atomizing nozzles forms an isolation layer with the inner wall of the cylindrical atomizing tank, preventing the atomized powder from colliding with the inner wall of the atomizing tank.

[0008] Preferably, a vacuum system is arranged at the top of the tower mounting frame, a collection system is arranged on one side of the tower mounting frame, and a smelting liquid supply system is arranged on the upper surface of the tower mounting frame.

[0009] Preferably, the atomizing mechanism includes an annular slide rail, which is fixedly sleeved inside the atomizing can. Several pneumatic sliders slide in an annular array on the top of the annular slide rail. One of the pneumatic sliders is fixedly connected to the annular slide rail. A movable cylinder is movably sleeved on one side of each pneumatic slider through a pin. A first transmission plate and a second transmission plate are fixedly connected to the surface of each movable cylinder in a symmetrical structure.

[0010] Among them, several pneumatic sliders can make the upper and lower sets of nozzles converge or expand.

[0011] Preferably, a first hinge block is hinged to each pair of the two first transmission plates at their ends, and a second hinge block is hinged to each pair of the two second transmission plates at their ends. A first support frame is fixedly connected to the bottom of each first hinge block, and a first mounting ring is rotatably connected to the inner wall of each first support frame via a plug rod. A second support frame is fixedly connected to the top of each second hinge block, and a second mounting ring is rotatably connected to the inner wall of each second support frame via a plug rod.

[0012] The two sets of nozzles are axially rotated by the first mounting ring and the second support frame.

[0013] Preferably, the isolation spray assembly further includes a first annular track located below the annular slide rail. The first annular track is fixedly connected to the inner wall of the atomizing tank. A plurality of first atomizing spray guns are fixedly sleeved on the inner wall of the first mounting ring. A first hinge ring is fixedly sleeved on the surface of each first atomizing spray gun. A first bracket is hinged on the surface of each first hinge ring. The first bracket is slidably connected inside the first annular track. Inclined surfaces are provided on both sides of each first bracket, and the inclined surfaces on two adjacent first brackets are in contact.

[0014] Preferably, a spherical channel is fixedly sleeved at the output end of the first atomizing spray gun, and a spherical valve is rotatably sleeved inside the spherical channel via a rod. A first counterweight is fixedly connected to one end of the rod on each spherical valve.

[0015] The ball valve rotates inside the ball channel due to the gravity of the first counterweight, thereby regulating the gas output port.

[0016] Preferably, the flow-guiding spray assembly further includes a second annular track located above the first annular track, the second annular track being fixedly sleeved on the inner wall of the atomizing tank, and a plurality of the second atomizing spray guns being fixedly sleeved on the inner wall of the second mounting ring.

[0017] Preferably, each of the second atomizing spray guns is fixedly fitted with a second hinge ring, each of the second hinge rings is hinged with a second bracket, and the second bracket is slidably connected inside the second annular track.

[0018] Preferably, each of the inner walls on both sides of the second atomizing spray gun is rotatably connected to a valve cylinder with through holes. The inner walls on both sides of the valve cylinder are rotatably connected to a valve rod with through grooves via insert rods. Each valve rod has a symmetrical structure on its side surface, with two baffles movably sleeved on the insert rods. The baffles are sealed and adapted to the through holes on the valve cylinder. Each valve rod has a first spring movably sleeved on the insert rod surface. Each valve rod has a second counterweight fixedly connected to one end.

[0019] The second counterweight causes the baffle to rotate inside the valve cylinder due to its own weight. The baffle is sealed and matched with the through hole on the valve cylinder to regulate the gas output port.

[0020] A method for preparing a gas atomization device for titanium metal powder, applicable to the aforementioned gas atomization device for titanium metal powder, includes the following steps:

[0021] S1. Melting liquid diversion: The titanium metal raw material is placed in a vacuum induction melting furnace and melted under inert gas protection or vacuum conditions to reduce impurities. The melted metal liquid flows into the crucible and then flows out downward through the guide nozzle at the bottom of the crucible.

[0022] S2, droplet atomization powder production;

[0023] S2.1, Non-collision between atomization powder production and can wall: First, the pneumatic slider slides inside the annular slide rail via an external control system, causing several pneumatic sliders to be distributed in a circular array. The first atomizing spray gun at the bottom of the first hinge block moves downward at an angle and is hinged to the first hinge ring via the first bracket, causing the output end of the first atomizing spray gun to tilt downward. Under the action of the weight of the first counterweight block, the ball valve rotates inside the ball channel, blocking the output end of the first atomizing spray gun, while the atomizing nozzle remains open. The gas sprayed from the atomizing nozzle flows along the inner wall of the atomizing can, forming an isolation layer to prevent atomized powder from colliding with the can wall. When the second atomizing spray guns are arranged in a ring array, they move downwards at an angle and are hinged to the second support through the second hinge ring. This causes the main nozzle of the second atomizing spray gun to tilt downwards. Under the gravity of the second counterweight, the main nozzle flows while the secondary nozzle does not. The gas is sprayed out to atomize and pulverize the droplets. This reduces the change in particle shape caused by collision and makes the atomized gas distribution more uniform through the ring array of the gun head. Combined with the effect of the isolation layer, the resulting powder particles are finer and have a narrower distribution, thus improving the overall performance of the powder.

[0024] S2.2, Collision between Atomized Powder and Tank Wall: An external control system causes pneumatic sliders to slide inside an annular slide rail, resulting in several pneumatic sliders converging in an arc shape. When the first atomizing spray gun converges, the powder inside the first annular track is scooped out by the inclined surface on the first support, preventing accumulation. Simultaneously, the first atomizing spray gun moves axially relative to the two first supports, causing it to tilt downwards and become horizontal. During this process, under the weight of the first counterweight, the ball valve rotates inside the ball channel, allowing flow between the output end of the first atomizing spray gun and the atomizing nozzle. At the same time, when the second atomizing spray gun converges in an arc shape, several second atomizing spray guns tilt upwards, and the second atomizing spray guns pass through the second support. The hinge support of the second hinge ring is in a horizontal state, allowing the main nozzle and the auxiliary nozzle to flow together. The droplets are first atomized through the main nozzle to form powder, and then undergo secondary atomization and powdering through the first atomizing spray gun. In particular, the lateral atomization process causes the powder to move to one side and be sprayed through the auxiliary nozzle, creating a pressure difference between the lateral spray and the powder. This guides the direction of powder movement and prevents the powder from splashing upwards vertically. The collision between the powder and the inner wall of the can remove some impurities attached to the surface of the powder particles, and further breaks down larger powder particles to reduce volume differences. The collision also makes the toner particles more regular in shape and more compactly arranged, thereby increasing the mass of toner per unit volume and improving powder density.

[0025] S3. Atomizing Can Cleaning: Both the first and second atomizing spray guns can be transformed from an arc array to a ring array. The first and second atomizing spray guns continuously output gas. During the equidistant movement of the first and second atomizing spray guns, the gas inside the main and auxiliary spray ports continuously flows, which can clean the impurities and powder adhering to the inner wall of the atomizing can.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. This invention achieves multi-functional optimization of the powder-making process through the synergistic design of isolation and diversion jet components; the two sets of atomizing spray guns can switch between arc-shaped convergence and annular array states, corresponding to collision and non-collision powder-making modes; in the non-collision mode, the annular array gun head combines with the tank wall isolation layer to make the atomized gas evenly distributed, producing high-quality powder with fine particle size and high sphericity; in the collision mode, through secondary atomization and collision with the tank wall, impurities are removed, large particles are broken, and the powder bulk density and uniformity are improved; the device also has an automatic cleaning function, with the airflow from the spray nozzle cleaning impurities on the tank wall, realizing high-quality production of titanium metal powder.

[0028] 2. This invention controls the convergence or expansion of two sets of atomizing spray guns via a pneumatic slider, enabling switching between two modes: powder collision with the can wall and non-collision. In non-collision mode, the annular array of gun heads, combined with the inner wall isolation layer, ensures uniform atomization gas distribution and stable droplet solidification, producing powders with finer particle size, narrower distribution, and higher sphericity. In collision mode, secondary atomization and collision with the can wall promote a more compact arrangement of powder particles, increasing the mass per unit volume and improving the packing density. Simultaneously, by breaking up agglomerates and adjusting particle arrangement, the internal porosity of the powder is reduced, achieving uniform density distribution and providing stable raw materials for subsequent powder metallurgy, printing, and other processes.

[0029] 3. When the first support slides within the first annular track, its inclined surface can automatically remove the powder accumulated within the track. The different nozzles of the second atomizing spray gun, in conjunction with the airflow, can clean the impurities and powder adhering to the inner wall of the atomizing tank, preventing internal blockage and ensuring continuous and stable operation of the device, thus reducing downtime for maintenance. The non-collision mode reduces the scouring and wear of powder on the tank wall and internal components, while the reasonable structural design in the collision mode also reduces the risk of equipment damage caused by collisions, extends the service life of key components such as the atomizing tank and spray gun, and reduces equipment replacement and maintenance costs.

[0030] 4. This invention utilizes a sealed valve structure composed of a spherical channel, a spherical valve, and a first counterweight to achieve automatic opening and closing of the nozzle using gravity. The valve closes when the spray gun is tilted and opens when it is horizontal, making operation simple and responsive. Simultaneously, the convex design of the spherical channel effectively limits the counterweight's movement, prevents the valve from loosening, ensures stable gas flow and sealing, reduces the risk of equipment failure, and extends service life.

[0031] 5. This invention utilizes two sets of atomizing spray guns working in tandem. When the droplets converge, they are concentrated to achieve efficient atomization, and when they expand, they cover the droplets at multiple angles, improving atomization efficiency, ensuring that the molten metal flow is fully broken up, increasing the yield of fine powder, and optimizing gas energy utilization to reduce energy consumption. The position and spray state of the spray guns can be flexibly adjusted through the control system, precisely controlling parameters such as atomizing gas pressure, flow rate, and spray angle, stabilizing the atomization process, reducing powder quality instability caused by parameter fluctuations, and improving the repeatability and reliability of the process.

[0032] 6. When the second atomizing spray gun is tilted, the second counterweight, through its own gravity, causes the valve stem to drive the baffle to rotate inside the valve cylinder, forming a sealed cavity to prevent gas leakage. In the horizontal state, the baffle rotates to connect the valve cylinder through hole with the through groove on the valve stem, delivering gas to the secondary spray nozzle, while preventing the second counterweight from shaking, improving the sealing and stability of the valve structure, and ensuring the reliability of equipment operation. Attached Figure Description

[0033] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0034] Figure 2 This is a three-dimensional structural diagram of the atomizing mechanism of the present invention.

[0035] Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A in the middle.

[0036] Figure 4 This is a three-dimensional enlarged structural diagram of the atomizing mechanism of the present invention.

[0037] Figure 5 This is a three-dimensional enlarged structural diagram of the isolation spray assembly of the present invention.

[0038] Figure 6 This is a three-dimensional enlarged structural diagram of the diversion jet assembly of the present invention.

[0039] Figure 7 This is a three-dimensional exploded view of the flow-guiding jet assembly of the present invention.

[0040] Figure 8 This is a three-dimensional exploded view of the isolation spray assembly of the present invention.

[0041] Figure 9 This is a schematic cross-sectional view of the first atomizing spray gun of the present invention, showing the tilted use state of the first atomizing spray gun.

[0042] Figure 10 This is a schematic diagram of the tilted use structure of the first atomizing spray gun of the present invention, to show the gas barrier layer.

[0043] Figure 11 This is a schematic diagram of the first atomizing spray gun of the present invention in a horizontal use state.

[0044] Figure 12 This is a schematic cross-sectional view of the inclined structure of the second atomizing spray gun of the present invention.

[0045] Figure 13 This is a schematic cross-sectional view of the second atomizing spray gun of the present invention in its horizontal use state.

[0046] Figure 14 This is a schematic cross-sectional view of the second atomizing spray gun of the present invention in a horizontal use state, to show the use state of airflow guiding powder.

[0047] The labels in the diagram are as follows: 1. Tower mounting frame; 11. Vacuum system; 12. Collection system; 13. Melting liquid supply system; 14. Atomizing tank;

[0048] 2. Atomizing mechanism; 21. Circular slide rail; 22. Pneumatic slider; 23. Movable cylinder; 24. First transmission plate; 25. Second transmission plate; 26. First hinge block; 27. Second hinge block; 28. First support frame; 281. First mounting ring; 29. ​​Second support frame; 291. Second mounting ring;

[0049] 3. Isolation spray assembly; 31. First annular track; 32. First atomizing spray gun; 321. Atomizing nozzle; 33. First hinge ring; 34. First bracket; 341. Inclined surface; 35. Spherical channel; 351. Spherical valve; 36. First counterweight;

[0050] 4. Drainage jet assembly; 41. Second annular track; 42. Second atomizing spray gun; 421. Main jet nozzle; 422. Secondary jet nozzle; 43. Second hinge ring; 44. Second bracket; 45. Valve cylinder; 451. Valve stem; 452. Baffle; 453. First spring; 46. Second counterweight. Detailed Implementation

[0051] Example 1, such as Figures 1-4As shown, the present invention relates to a gas atomization device for titanium metal powder, comprising a tower-type mounting frame 1 with stairs, a vacuum system 11 arranged at the top of the tower-type mounting frame 1, a collection system 12 arranged on one side of the tower-type mounting frame 1, a melting liquid supply system 13 arranged on the upper surface of the tower-type mounting frame 1, an atomizing tank 14 with a cooling system arranged on the inner wall of the tower-type mounting frame 1, an atomizing mechanism 2 arranged inside the atomizing tank 14, an isolation spray assembly 3, and a diversion spray assembly 4.

[0052] It is worth noting that the vacuum system 11, the collection system 12, and the smelting liquid supply system 13 are all conventional equipment in the prior art, and will not be described in detail here. The vacuum system 11 is used to extract the air in the system through a vacuum pump during the smelting and gas atomization process, creating a high vacuum or inert gas protected environment. The collection system 12 is used to collect titanium metal powder. The smelting liquid supply system 13 is used for the molten titanium metal to flow out through the gate or supply pipe, forming a stable liquid flow, which can effectively prevent the titanium metal liquid from reacting with the pipeline and ensure the purity and stability of the liquid flow.

[0053] The atomizing mechanism 2 includes an annular slide rail 21, which is fixedly fitted inside the atomizing can 14. Several pneumatic sliders 22 slide in a circular array on the top of the annular slide rail 21, and one of the pneumatic sliders 22 is fixedly connected to the annular slide rail 21. A movable cylinder 23 is movably fitted to one side of each pneumatic slider 22 through a pin. A first transmission plate 24 and a second transmission plate 25 are fixedly connected to the surface of each movable cylinder 23 in a symmetrical structure. A first hinge block 26 is hinged to the ends of each pair of first transmission plates 24, and a second hinge block 27 is hinged to the ends of each pair of second transmission plates 25. A first support frame 28 is fixedly connected to the bottom of each first hinge block 26. A first mounting ring 281 is rotatably connected to the inner wall of each first support frame 28 through a rod. A second support frame 29 is fixedly connected to the top of each second hinge block 27, and a second mounting ring 291 is rotatably connected to the inner wall of each second support frame 29 through a rod.

[0054] It is worth noting that the oblong hole on the first transmission plate 24 is larger than the insert rods on both sides of the inner wall of the first hinge block 26, so that the first transmission plate 24 can tilt at an angle when it rotates axially, thus preventing the first transmission plate 24 from getting stuck with the first hinge block 26.

[0055] Specifically, several pneumatic sliders 22 can converge or expand. When converged, the pneumatic sliders 22 are distributed in an arc shape at equal intervals, causing the two sets of atomizing spray guns to concentrate on atomizing the droplets. During the convergence process, the distance between the two sets of atomizing spray guns increases. When expanded, the pneumatic sliders 22 are distributed in a ring shape at equal intervals, causing the two sets of atomizing spray guns to atomize the droplets at multiple angles. The distance between the two sets of atomizing spray guns decreases.

[0056] This invention controls the convergence or expansion of two sets of atomizing spray guns via a pneumatic slider 22, enabling switching between two modes: powder collision with the can wall and non-collision. In non-collision mode, the annular array of gun heads, combined with the inner wall isolation layer, ensures uniform atomization gas distribution and stable droplet solidification, producing powders with finer particle size, narrower distribution, and higher sphericity. In collision mode, secondary atomization and collision with the can wall promote a more compact arrangement of powder particles, increasing the mass per unit volume and improving the packing density. Simultaneously, by breaking up agglomerates and adjusting particle arrangement, the internal porosity of the powder is reduced, achieving uniform density distribution and providing stable raw materials for subsequent powder metallurgy, printing, and other processes.

[0057] like Figure 3 , Figure 5 and Figures 8-11 As shown, the isolation spray assembly 3 includes a first annular track 31, which is fixedly connected to the inner wall of the atomizing tank 14 and located below the annular slide rail 21. A first atomizing spray gun 32 is fixedly sleeved on the inner wall of each first mounting ring 281. Two atomizing nozzles 321 are fixedly connected to the bottom of each first atomizing spray gun 32. A first hinge ring 33 is fixedly sleeved on the surface of each first atomizing spray gun 32. A first bracket 34 is hinged on the surface of each first hinge ring 33. The first bracket 34 is slidably connected inside the first annular track 31. Inclined surfaces 341 are provided on both sides of each first bracket 34. The inclined surfaces 341 on two adjacent first brackets 34 are in contact. A spherical channel 35 is fixedly sleeved at the output end of the first atomizing spray gun 32. A spherical valve 351 is rotatably sleeved inside the spherical channel 35 through a rod. A first counterweight 36 is fixedly connected to one end of the rod on each spherical valve 351.

[0058] It is worth noting that the first support 34 slides inside the first annular track 31, and the powder inside can be removed by the upper inclined surface 341, which solves the problem of powder accumulation inside the first annular track 31.

[0059] Specifically, when several first atomizing spray guns 32 converge, the first atomizing spray guns 32 tilt downwards and are in a horizontal state, causing the output end of the first atomizing spray gun 32 to flow with the atomizing nozzle 321, thus atomizing the droplets; when several first atomizing spray guns 32 expand, the first atomizing spray guns 32 tilt upwards and the output end of the first atomizing spray gun 32 tilts upwards, causing the output end of the first atomizing spray gun 32 to stop flowing, while the atomizing nozzle 321 flows. The gas flowing out of the atomizing nozzle 321 flows along the inner wall of the atomizing can 14, so that the powder does not expand and come into contact with the inner wall of the atomizing can 14.

[0060] Specifically, when the first atomizing spray gun 32 is tilted, the ball valve 351 rotates inside the ball channel 35 due to the weight of the first counterweight 36, causing the ball channel 35 and the ball valve 351 to be disconnected. When the first atomizing spray gun 32 is horizontal, the ball channel 35 and the ball valve 351 are connected. When the first atomizing spray gun 32 is tilted, the ball channel 35 is fixed inside the first atomizing spray gun 32 and has a convex surface, which can prevent the first counterweight 36 from shaking and the valve from loosening, thus affecting the use of the first atomizing spray gun 32.

[0061] This invention utilizes a sealed valve structure consisting of a spherical channel 35, a spherical valve 351, and a first counterweight 36 to automatically open and close the nozzle using gravity. The valve closes when the spray gun is tilted and opens when it is horizontal, making operation simple and responsive. Simultaneously, the convex design of the spherical channel 35 effectively limits the counterweight's movement, prevents the valve from loosening, ensures stable gas flow and sealing, reduces the risk of equipment failure, and extends service life.

[0062] like Figures 2-3 , Figures 6-7 and Figures 12-14 As shown, the jetting assembly 4 includes a second annular track 41, which is fixedly sleeved on the inner wall of the atomizing can 14 and located above the first annular track 31. A second atomizing spray gun 42 is fixedly sleeved on the inner wall of each second mounting ring 291. Each second atomizing spray gun 42 has a main spray nozzle 421 and a secondary spray nozzle 422 at its output end. A second hinge ring 43 is fixedly sleeved on the surface of each second atomizing spray gun 42. A second bracket 44 is hinged to the surface of each second hinge ring 43, and the second bracket 44 is slidably connected to the second... Inside the annular track 41, each second atomizing spray gun 42 has a valve cylinder 45 with through holes rotatably connected to the inner walls on both sides. The inner walls on both sides of the valve cylinder 45 are rotatably connected to valve rods 451 with through grooves via insert rods. The side surface of each valve rod 451 has a symmetrical structure with two baffles 452 movably sleeved by insert rods. The baffles 452 are sealed and adapted to the through holes on the valve cylinder 45. A first spring 453 is movably sleeved on the insert rod surface of each valve rod 451. A second counterweight 46 is fixedly connected to one end of each valve rod 451.

[0063] Specifically, when several second atomizing spray guns 42 converge in an arc shape, they tilt upwards and remain horizontal, allowing the main nozzle 421 and secondary nozzle 422 to flow together, thus atomizing the droplets. The powder collides with the inner wall of the atomizing tank 14, and the secondary nozzle 422 guides the flow direction of the main nozzle 421, causing the powder to flow downwards after the collision. When several second atomizing spray guns 42 are arranged in a ring array, they tilt downwards and remain horizontal, allowing the main nozzle 421 to flow while the secondary nozzle 422 remains closed, thus atomizing the droplets.

[0064] Specifically, when the second atomizing spray gun 42 is tilted, the second counterweight 46, under its own weight, causes the valve stem 451 to drive the baffle 452 to rotate inside the valve cylinder 45. The baffle 452 moves into the through hole on the valve cylinder 45, forming a sealed cavity in the valve cylinder 45. When the second atomizing spray gun 42 is in a horizontal state, the baffle 452 rotates inside the valve cylinder 45, causing the through hole of the valve cylinder 45 to connect with the through groove on the valve stem 451, thereby delivering gas to the secondary nozzle 422, preventing the second counterweight 46 from shaking, and improving the sealing performance of the valve structure.

[0065] When the first support 34 slides within the first annular track 31, its inclined surface 341 can automatically remove the powder accumulated within the track. The different nozzles of the second atomizing spray gun 42, in conjunction with the airflow, can clean the impurities and powder adhering to the inner wall of the atomizing tank 14, preventing internal blockages, ensuring continuous and stable operation of the device, and reducing downtime for maintenance. The non-collision mode reduces the scouring and wear of powder on the tank wall and internal components, while the reasonable structural design in the collision mode also reduces the risk of equipment damage caused by collisions, extends the service life of key components such as the atomizing tank 14 and the spray gun, and reduces equipment replacement and maintenance costs.

[0066] This invention utilizes two sets of atomizing spray guns working in tandem. When the droplets converge, they are concentrated to achieve efficient atomization, and when they expand, they cover the droplets at multiple angles, improving atomization efficiency, ensuring that the molten metal flow is fully broken up, increasing the yield of fine powder, and optimizing gas energy utilization to reduce energy consumption. The position and spray state of the spray guns can be flexibly adjusted through the control system, precisely controlling parameters such as atomizing gas pressure, flow rate, and spray angle, stabilizing the atomization process, reducing powder quality instability caused by parameter fluctuations, and improving the repeatability and reliability of the process.

[0067] Example 2: A method for preparing a gas atomization device for titanium metal powder, characterized by comprising the following steps:

[0068] S1. Melting liquid diversion: The titanium metal raw material is placed in a vacuum induction melting furnace and melted under inert gas protection or vacuum conditions to reduce impurities. The melted metal liquid flows into the crucible and then flows out downward through the guide nozzle at the bottom of the crucible.

[0069] S2, droplet atomization powder production;

[0070] S2.1, Non-collision between atomization powder production and can wall: First, the pneumatic slider 22 slides inside the annular slide rail 21 through the external control system, causing several pneumatic sliders 22 to be distributed in a circular array. The first atomizing spray gun 32 at the bottom of the first hinge block 26 moves downward at an angle and is hinged to the first hinge ring 33 through the first bracket 34, causing the output end of the first atomizing spray gun 32 to tilt downward. Under the action of the weight of the first counterweight block 36, the ball valve 351 rotates inside the ball channel 35 to block the output end of the first atomizing spray gun 32, while the atomizing nozzle 321 is open. The gas sprayed from the atomizing nozzle 321 flows along the inner wall of the atomizing can 14, forming an isolation layer. To avoid collision between the atomized powder and the inner wall of the can, when several second atomizing spray guns 42 are arranged in a ring array, the second atomizing spray guns 42 move downward at an angle and are hinged to the second support 44 through the second hinge ring 43. This causes the main nozzle 421 on the second atomizing spray gun 42 to tilt downward, and under the gravity of the second counterweight 46, the main nozzle 421 is allowed to flow while the secondary nozzle 422 is not allowed to flow. By spraying gas to atomize and powder the droplets, the particle shape changes caused by collision can be reduced, and the ring array of the gun head makes the atomized gas distribution more uniform. Combined with the effect of the isolation layer, the resulting powder particles are finer and have a narrower distribution, thus improving the overall performance of the powder.

[0071] S2.2, Collision between Atomized Powder and Tank Wall: An external control system causes the pneumatic slider 22 to slide inside the annular slide rail 21, resulting in several pneumatic sliders 22 converging in an arc shape. When the first atomizing spray gun 32 converges, the powder inside the first annular track 31 is scooped out by the inclined surface 341 on the first support 34 to prevent accumulation. Simultaneously, the first atomizing spray gun 32 moves axially relative to the two first supports 34, causing it to tilt downwards and become horizontal. During this process, under the weight of the first counterweight 36, the ball valve 351 rotates inside the ball channel 35, allowing flow between the output end of the first atomizing spray gun 32 and the atomizing nozzle 321. At the same time, when the second atomizing spray gun 42 converges in an arc shape, several second atomizing spray guns 42 tilt upwards, and the second atomizing spray gun... The toner spray gun 42 is horizontally supported by the second bracket 44 and the second hinge ring 43, allowing the main nozzle 421 and the auxiliary nozzle 422 to flow together. The droplets are first atomized through the main nozzle 421 to form powder, and then undergo secondary atomization and powder preparation through the first atomizing spray gun 32. The powder moves to one side through the lateral atomization process and is then sprayed through the auxiliary nozzle 422. The pressure difference between the lateral spray and the powder guides the direction of powder movement and prevents the powder from splashing upwards vertically. The collision between the powder and the inner wall of the can remove some impurities attached to the surface of the powder particles, and further breaks up larger powder particles to reduce volume differences. The collision also makes the toner particles more regular in shape and more compactly arranged, thereby increasing the mass of toner per unit volume and improving powder density.

[0072] S3. Atomizing Can Cleaning: Both the first atomizing spray gun 32 and the second atomizing spray gun 42 can be transformed from an arc array to a ring array. The first atomizing spray gun 32 and the second atomizing spray gun 42 continuously output gas. During the equidistant movement of the first atomizing spray gun 32 and the axial movement of the second atomizing spray gun 42, the gas in the main nozzle 421 and the auxiliary nozzle 422 continuously flows, which can clean the impurities and powder adhering to the inner wall of the atomizing can 14.

[0073] The embodiments disclosed in this invention are preferred embodiments, but are not limited thereto. Those skilled in the art can easily understand the spirit of this invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of this invention, they are all within the protection scope of this invention.

Claims

1. A gas atomization device for titanium metal powder, comprising a tower-type mounting frame with stairs, an atomizing tank, an atomizing mechanism, an isolating spray assembly, and a guiding spray assembly, characterized in that, The isolation spray assembly includes a plurality of first atomizing spray guns that can be distributed in an arc or in a ring array, and each first atomizing spray gun has two atomizing nozzles fixedly connected to its bottom; the diversion spray assembly includes a plurality of second atomizing spray guns located above the first atomizing spray guns that can be distributed in an arc or in a ring array, and each second atomizing spray gun has a main spray nozzle at its output end and a secondary spray nozzle on the surface of its output end. When several first atomizing spray guns and several second atomizing spray guns converge in an arc, the first atomizing spray guns and the second atomizing spray guns are in a horizontal state. The output end of the first atomizing spray gun is in communication with the atomizing nozzle, and the spray nozzle is in communication with the secondary spray nozzle. The droplets are atomized laterally. The powder collides with the inner wall of the atomizing tank. A pressure difference is formed between the air spray through the secondary spray nozzle and the lateral air spray, which can guide the direction of powder movement. When several first atomizing spray guns and several second atomizing spray guns are distributed in a ring at equal intervals, the output ends of the first atomizing spray guns are tilted upwards, and the output ends of the second atomizing spray guns are tilted downwards. This causes the output ends of the first atomizing spray guns to be blocked, while the atomizing nozzles and the main spray nozzles are open, but the secondary spray nozzles are blocked. The flowing gas at the atomizing nozzles forms an isolation layer with the inner wall of the cylindrical atomizing tank, preventing the atomized powder from colliding with the inner wall of the atomizing tank.

2. The gas atomization device for titanium metal powder according to claim 1, characterized in that, A vacuum system is arranged at the top of the tower mounting frame, a collection system is arranged on one side of the tower mounting frame, and a smelting liquid supply system is arranged on the upper surface of the tower mounting frame.

3. The gas atomization device for titanium metal powder according to claim 2, characterized in that, The atomizing mechanism includes an annular slide rail, which is fixedly sleeved inside the atomizing can. Several pneumatic sliders slide in an annular array on the top of the annular slide rail. One of the pneumatic sliders is fixedly connected to the annular slide rail. A movable cylinder is movably sleeved on one side of each pneumatic slider through a pin. A first transmission plate and a second transmission plate are fixedly connected to the surface of each movable cylinder in a symmetrical structure. Among them, several pneumatic sliders can make the upper and lower sets of nozzles converge or expand.

4. The gas atomization device for titanium metal powder according to claim 3, characterized in that, Each pair of the two first transmission plates is hinged with a first hinge block, and each pair of the two second transmission plates is hinged with a second hinge block. Each first hinge block is fixedly connected to a first support frame at its bottom. Each first support frame is rotatably connected to a first mounting ring via a plug rod on its inner wall. Each second hinge block is fixedly connected to a second support frame at its top. Each second support frame is rotatably connected to a second mounting ring via a plug rod on its inner wall. The two sets of nozzles are axially rotated by the first mounting ring and the second support frame.

5. The gas atomization device for titanium metal powder according to claim 4, characterized in that, The isolation spray assembly also includes a first annular track located below the annular slide rail. The first annular track is fixedly connected to the inner wall of the atomizing tank. A plurality of first atomizing spray guns are fixedly sleeved on the inner wall of the first mounting ring. A first hinge ring is fixedly sleeved on the surface of each first atomizing spray gun. A first bracket is hinged on the surface of each first hinge ring. The first bracket is slidably connected inside the first annular track. Inclined surfaces are provided on both sides of each first bracket. The inclined surfaces on two adjacent first brackets are in contact with each other.

6. The gas atomization device for titanium metal powder according to claim 5, characterized in that, The first atomizing spray gun output end is fixedly sleeved with a spherical channel, and a spherical valve is rotatably sleeved inside the spherical channel via a rod. A first counterweight is fixedly connected to one end of the rod on each spherical valve. The ball valve rotates inside the ball channel due to the gravity of the first counterweight, thereby regulating the gas output port.

7. The atomizing device for titanium metal powder according to claim 6, characterized in that, The flow-guiding spray assembly also includes a second annular track located above the first annular track. The second annular track is fixedly sleeved on the inner wall of the atomizing tank, and several second atomizing spray guns are fixedly sleeved on the inner wall of the second mounting ring.

8. The atomizing device for titanium metal powder according to claim 7, characterized in that, Each of the second atomizing spray guns is fixedly fitted with a second hinge ring, and each of the second hinge rings is hinged with a second bracket, which is slidably connected inside the second annular track.

9. The gas atomization device for titanium metal powder according to claim 8, characterized in that, Each of the second atomizing spray guns has a valve cylinder with through holes rotatably connected to the inner walls on both sides. The inner walls on both sides of the valve cylinder are rotatably connected to valve rods with through grooves via insert rods. Each valve rod has a symmetrical structure with two baffles movably sleeved on its side surface via insert rods. The baffles are sealed and adapted to the through holes on the valve cylinder. Each valve rod has a first spring movably sleeved on its insert rod surface. Each valve rod has a second counterweight fixedly connected to one end. The second counterweight causes the baffle to rotate inside the valve cylinder due to its own weight. The baffle is sealed and matched with the through hole on the valve cylinder to regulate the gas output port.

10. A method for preparing a gas atomization device for titanium metal powder, applicable to the gas atomization device for titanium metal powder as described in claim 9, characterized in that, Includes the following steps: S1. Melting liquid diversion: The titanium metal raw material is placed in a vacuum induction melting furnace and melted under inert gas protection or vacuum conditions to reduce impurities. The melted metal liquid flows into the crucible and then flows out downward through the guide nozzle at the bottom of the crucible. S2, droplet atomization powder production; S2.1, Non-collision between atomization powder production and can wall: First, the pneumatic slider slides inside the annular slide rail via an external control system, causing several pneumatic sliders to be distributed in a circular array. The first atomizing spray gun at the bottom of the first hinge block moves downward at an angle and is hinged to the first hinge ring via the first bracket, causing the output end of the first atomizing spray gun to tilt downward. Under the action of the weight of the first counterweight block, the ball valve rotates inside the ball channel, blocking the output end of the first atomizing spray gun, while the atomizing nozzle remains open. The gas sprayed from the atomizing nozzle flows along the inner wall of the atomizing can, forming an isolation layer to prevent atomized powder from colliding with the can wall. When the second atomizing spray guns are arranged in a ring array, they move downwards at an angle and are hinged to the second support through the second hinge ring. This causes the main nozzle of the second atomizing spray gun to tilt downwards. Under the gravity of the second counterweight, the main nozzle flows while the secondary nozzle does not. The gas is sprayed out to atomize and pulverize the droplets. This reduces the change in particle shape caused by collision and makes the atomized gas distribution more uniform through the ring array of the gun head. Combined with the effect of the isolation layer, the resulting powder particles are finer and have a narrower distribution, thus improving the overall performance of the powder. S2.2, Collision between Atomized Powder and Tank Wall: An external control system causes pneumatic sliders to slide inside an annular slide rail, resulting in several pneumatic sliders converging in an arc shape. When the first atomizing spray gun converges, the powder inside the first annular track is scooped out by the inclined surface on the first support, preventing accumulation. Simultaneously, the first atomizing spray gun moves axially relative to the two first supports, causing it to tilt downwards and become horizontal. During this process, under the weight of the first counterweight, the ball valve rotates inside the ball channel, allowing flow between the output end of the first atomizing spray gun and the atomizing nozzle. At the same time, when the second atomizing spray gun converges in an arc shape, several second atomizing spray guns tilt upwards, and the second atomizing spray guns pass through the second support. The hinge support of the second hinge ring is in a horizontal state, allowing the main nozzle and the auxiliary nozzle to flow together. The droplets are first atomized through the main nozzle to form powder, and then undergo secondary atomization and powdering through the first atomizing spray gun. In particular, the lateral atomization process causes the powder to move to one side and be sprayed through the auxiliary nozzle, creating a pressure difference between the lateral spray and the powder. This guides the direction of powder movement and prevents the powder from splashing upwards vertically. The collision between the powder and the inner wall of the can remove some impurities attached to the surface of the powder particles, and further breaks down larger powder particles to reduce volume differences. The collision also makes the toner particles more regular in shape and more compactly arranged, thereby increasing the mass of toner per unit volume and improving powder density. S3. Atomizing Can Cleaning: Both the first and second atomizing spray guns can be transformed from an arc array to a ring array. The first and second atomizing spray guns continuously output gas. During the equidistant movement of the first and second atomizing spray guns, the gas inside the main and auxiliary spray ports continuously flows, which can clean the impurities and powder adhering to the inner wall of the atomizing can.

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