Powder collecting cabin of atomizing chamber for preparing metal powder
By adopting a combined design of a hyperbolic spherical chamber and purging and vibration devices, the problem of powder sticking to the walls of the metal atomization chamber's powder collection compartment was solved, achieving efficient powder collection and extending equipment life, while reducing energy consumption and safety risks.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI QIANYAN GAOHE NEW MATERIALS TECHNOLOGY CO LTD
- Filing Date
- 2025-05-16
- Publication Date
- 2026-04-24
AI Technical Summary
The powder collection chamber design of traditional metal atomization chambers leads to powder sticking to the walls, resulting in powder quality deterioration, reduced production efficiency, increased production costs, shortened equipment lifespan, and safety hazards.
It adopts a double-curvature spherical chamber design and is equipped with multiple purging and vibration devices, including gas nozzles and piezoelectric ceramic oscillators, to optimize the airflow field and remove adhering powder through vibration.
It effectively reduces powder retention, decreases wall wear, improves the strength and service life of the powder collection chamber, reduces energy consumption, and minimizes safety hazards.
Smart Images
Figure CN224157761U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of metal powder preparation technology, and specifically to a powder collection chamber for a metal powder preparation atomization chamber. Background Technology
[0002] In metal powder preparation processes, the powder collection chamber at the bottom of traditional metal atomization chambers (such as VIGA) often adopts a conical design. Under the influence of gravity and inertia, the powder easily collides with and adheres to the walls of the collection chamber, forming an accumulation. This wall adhesion phenomenon leads to the following problems:
[0003] I. Deterioration of powder quality: 1. Increased oxygen content: Metal powder adhering to the wall of the powder collection chamber undergoes oxidation reaction with residual oxygen due to long-term exposure to high temperature environment; 2. Component contamination: The wall layer may peel off during repeated heating and mix into fresh powder, causing impurity contamination.
[0004] II. Reduced production efficiency: 1. Decreased recovery rate, with powder sticking to the wall reducing the effective collection rate by 10%-20%; 2. Frequent downtime for maintenance, reduced equipment utilization, and frequent disassembly may also accelerate the wear of seals, increasing the risk of failure.
[0005] III. Increased production costs: 1. Increased energy consumption: Adhesion to the wall increases airflow resistance, requiring an increase in inert gas flow rate to maintain atomization pressure, resulting in an increase in unit energy consumption of more than 20%; 2. Waste of raw materials: Adhesive powder can be scrapped at a rate of 5%-8% of total output due to oxidation.
[0006] IV. Shortened equipment lifespan: 1. Thermal stress damage: The difference in thermal expansion coefficients between the local adhesive layer and the metal wall surface leads to stress concentration, accelerating fatigue cracking of the powder collection chamber material; 2. Coating failure: When adhesive powder peels off, it may damage the inner wall anti-sticking coating (such as the aluminum nitride ceramic layer), leading to aggravated subsequent adhesion.
[0007] V. Safety Hazards: Dust explosion risk. Accumulated fine powder (especially reactive metals such as aluminum and magnesium) may form explosive dust clouds during cleaning, requiring additional explosion-proof systems.
[0008] Therefore, how to reduce the problem of powder sticking to the walls of the powder collection chamber is an urgent issue that needs to be addressed. Utility Model Content
[0009] In view of the shortcomings of the prior art described above, the technical problem to be solved by this utility model is to provide a powder collection chamber for a metal powder preparation atomization chamber, which can effectively suppress the problem of metal powder sticking to the wall of the powder collection chamber.
[0010] To achieve the above objectives, this utility model provides a powder collection chamber for a metal powder preparation atomization chamber, used to collect metal powder connected to the lower end of the atomization chamber. The lower port of the atomization chamber is circular with a diameter of D, and the axis of the lower port is vertically oriented. The powder collection chamber includes a hyperbolic spherical chamber and a purging device. The hyperbolic spherical chamber includes an upper hemisphere and a lower hemisphere. The inner wall of the upper hemisphere is a spherical surface with a radius of R1, and its upper end is connected to the lower port of the atomization chamber. R1 is 1D to 1.4D. The inner wall of the lower hemisphere is a spherical surface with a radius of R2, and R2 is 0.6D to 1D. The upper end of the lower hemisphere is connected to the lower end of the upper hemisphere, and the inner cavity forms a connecting circle at the connection point. The radius of the connecting circle R3 is 0.5R1 to R1, and the axis of the connecting circle is... The angle between the vertical and the horizontal is 0 to 10°; the height of the hypercurvature spherical chamber is H, and a purging device is respectively provided on the inner wall surface at a*H, b*H and c*H of the height of the hypercurvature spherical chamber, and is referred to as the first purging device, the second purging device and the third purging device, where the values of a, b and c are 0.7 to 1, 0.3 to 0.7 and 0 to 0.3, respectively. The purging device includes a plurality of gas nozzles circumferentially distributed around the vertical central axis of the lower port of the atomizing chamber. The gas nozzles can blow air onto the inner wall surface of the hypercurvature spherical chamber. The spray direction of the gas nozzles in the first purging device and the second purging device is inclined downwards at 0° to 90° relative to the horizontal surface, and the spray direction of the gas nozzles in the third purging device is horizontal.
[0011] Furthermore, it also includes a vibration device capable of causing the inner wall of the hyperbolic spherical chamber to vibrate.
[0012] Furthermore, the vibration device can generate spherical standing waves on the inner wall of the hyperbolic spherical chamber.
[0013] Furthermore, the vibration device includes multiple sets of piezoelectric ceramic oscillators embedded in the outside of a hyperbolic spherical chamber.
[0014] Furthermore, the jetting direction of the gas nozzles of the purging device is perpendicular to the radial direction of the spherical inner cavity where the gas nozzles are located.
[0015] Furthermore, the gas nozzles in the first purging device, the second purging device, and the third lower gas nozzle device are all evenly distributed circumferentially along the vertical central axis of the lower port of the atomization chamber.
[0016] Furthermore, the number of gas nozzles in the first and third purging devices is less than the number of gas nozzles in the second purging device.
[0017] Furthermore, the gas ejected from the gas nozzle is in the shape of a flat fan.
[0018] Furthermore, it also includes a backflush device, which includes a plurality of pulse backflush nozzles disposed in the inner cavity of the upper hemispherical chamber and distributed circumferentially along the central axis of the connecting circle. The pulse backflush nozzles are capable of blowing air downwards at the connecting circle.
[0019] Furthermore, the gas ejected from the pulse backflush nozzle is in the shape of a three-dimensional cone.
[0020] As described above, the powder collection chamber of this utility model has the following beneficial effects:
[0021] 1. By setting up a hyperbolic spherical chamber and installing purging devices at three different heights, the powder adhering to the inner cavity wall of the hyperbolic spherical chamber can be effectively removed. The airflow field is optimized by the curvature gradient of the inner cavity wall, which significantly reduces the amount of powder retained. Moreover, compared with a conical chamber, the hyperbolic spherical chamber can also reduce the impact of airflow on the inner cavity wall, effectively reducing the wear of the wall.
[0022] 2. The surface area of the hyperbolic spherical chamber is reduced by about 20%-30% compared with the same volume of cylindrical or conical structures, directly reducing the contact area between the powder and the wall. The uniform stress distribution of the hyperbolic spherical chamber significantly improves the pressure-bearing capacity compared with the conical structure, thereby increasing the strength and service life of the powder collection chamber.
[0023] 3. By setting up a vibration device, the ultrasonic array on the hyperbolic spherical chamber can generate spherical traveling waves, which greatly improves the vibration energy transfer efficiency compared with the conical structure and reduces the energy consumption required to peel off the adhering powder. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the powder collection chamber of this utility model.
[0025] Explanation of icon numbers
[0026] 1. Atomization Chamber
[0027] 2. Hypercurvature spherical hull
[0028] 21 Upper Hemisphere Cabin
[0029] 22 Lower Hemisphere Cabin
[0030] 23 Connecting circles
[0031] 24 Powder outlet
[0032] 3. Gas Nozzle
[0033] 4 Piezoelectric ceramic oscillator
[0034] 5 Pulse Backflush Nozzle Detailed Implementation
[0035] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.
[0036] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.
[0037] See Figure 1 This utility model provides a powder collection chamber for a metal powder preparation atomization chamber, which is connected to the lower end of the atomization chamber 1 to collect metal powder. The lower port of the atomization chamber 1 is cylindrical with a diameter of D, and the central axis of the lower port is vertically oriented. Preferably, the entire inner cavity of the atomization chamber 1 is cylindrical and vertically oriented.
[0038] The powder collection chamber of this utility model includes a hyperbolic spherical chamber 2 and a purging device. The hyperbolic spherical chamber 2 includes an upper hemisphere 21 and a lower hemisphere 22. The inner wall of the upper hemisphere 21 is a spherical surface with a radius of R1, and its upper end is connected to the lower port of the atomizing chamber 1. R1 is 1D to 1.4D. The inner wall of the lower hemisphere 22 is a spherical surface with a radius of R2, and R2 is 0.6D to 1D. The upper end of the lower hemisphere 22 is connected to the lower end of the upper hemisphere 21, and a connecting circle 23 is formed at the connection point. The radius R3 of the connecting circle 23 is 0.5R1 to R1, and the angle between the axis of the connecting circle 23 and the vertical direction is 0 to 10°, that is, the connecting circle 23 can be horizontal or slightly inclined. The lower end of the lower hemisphere 22 is the powder outlet 24. The height of the 2 is H, where H is preferably 1.5R1 to 2.5R1. A purging device is respectively provided on the inner wall surface at a*H, b*H and c*H of the height of the hypercurvature spherical chamber 2, and is referred to as the first purging device, the second purging device and the third purging device, where the values of a, b and c are 0.7 to 1, 0.3 to 0.7 and 0 to 0.3, respectively. The purging device includes a plurality of gas nozzles 3 circumferentially distributed around the vertical central axis of the lower port of the atomizing chamber 1. The gas nozzles 3 can blow air onto the inner wall surface of the hypercurvature spherical chamber 2. The spray direction of the gas nozzles 3 in the first purging device and the second purging device is inclined downward at 0° to 90° relative to the horizontal surface, and the spray direction of the gas nozzles 3 in the third purging device is horizontal.
[0039] The basic working principle of the powder collection chamber involved in this utility model is as follows: the surface area of the hyperbolic spherical chamber 2 is reduced by about 20%-30% compared with a cylindrical or conical structure of the same volume, which can directly reduce the contact area between the powder and the wall. Moreover, compared with the conical chamber, the inner wall of the hyperbolic spherical chamber 2 can reduce the impact of airflow on the chamber wall, effectively reducing the wear of the wall. During operation, the metal powder in the atomization chamber 1 falls into the hyperbolic spherical chamber 2. Due to the curvature gradient, the powder can gather towards the center. Since a first blowing device, a second blowing device, and a third blowing device are respectively set at the upper, middle, and bottom of the hyperbolic spherical chamber 2, the gas nozzles 3 of the first and second blowing devices spray inert gas downwards onto the inner wall of the hyperbolic spherical chamber 2, and the gas nozzles 3 of the third blowing device blow air horizontally, the powder adhering to the inner wall can be blown downwards and towards the center, thereby effectively preventing the powder from adhering to the inner wall of the hyperbolic spherical chamber 2.
[0040] The present invention will be further described below with reference to several specific embodiments:
[0041] See Figure 1In this embodiment, as a preferred design, the angle between the axis of the connecting circle 23 between the upper hemisphere 21 and the lower hemisphere 22 and the vertical is 0°, that is, the connecting circle 23 is horizontal, and the central axis of the entire upper hemisphere 21 coincides with the axis of the cylindrical inner cavity of the atomizing chamber 1. The powder outlet 24 at the lower end of the lower hemisphere 22 is also horizontal and coaxially arranged with the lower port of the atomizing chamber 1, and the central axis of the lower hemisphere 22 coincides with the central axis of the upper hemisphere 21. The distance between the upper port of the upper hemisphere 21 and the powder outlet 24 is the height H of the hyperbolic spherical chamber 2. In other embodiments, the connecting circle 23 between the upper hemisphere 21 and the lower hemisphere 22 may also have a slight inclination, which is less effective than the case where the connecting circle 23 is horizontal.
[0042] See Figure 1 In this embodiment, as a preferred design, a vibration device is also included. This device vibrates the inner wall of the hyperbolic spherical chamber 2, loosening the adhered powder and achieving its peeling. Further, the vibration device includes multiple sets of piezoelectric ceramic vibrators 4 embedded in the outer sheath of the hyperbolic spherical chamber 2. Piezoelectric ceramic vibrators 4 are provided on both the upper hemisphere 21 and the lower hemisphere 22, arranged in a circular array around the vertical central axis of the lower port of the atomizing chamber 1. During operation, spherical standing waves are generated by the multiple sets of piezoelectric ceramic vibrators 46 (frequency 25-40kHz), achieving the peeling of the adhered powder.
[0043] See Figure 1 In this embodiment, as a preferred design, the spray direction of all gas nozzles 3 of the purging device is perpendicular to the radial direction of the spherical inner cavity where the gas nozzle 3 is located. That is, the radial line connecting the gas nozzle 3 and the center of the spherical inner cavity is perpendicular to the spray direction of the gas nozzle 3. Since the gas nozzle 3 is set in the inner cavity of the hypercurvature spherical chamber 2 with a certain distance from the inner cavity wall, the spray direction will not be directly tangent to the spherical inner cavity wall, but parallel to the tangent at the projection of the gas nozzle 3 on the spherical inner cavity wall. In other words, when the gas nozzle 3 moves radially along the inner cavity wall to the spherical inner cavity wall, its spray direction is tangent to the spherical inner cavity wall. This can better achieve the purging effect of the powder adhering to the wall.
[0044] See Figure 1In this embodiment, as a preferred design, the gas nozzles 3 in the same purging device are all tilted in the same direction in the circumferential direction. That is, from a top view, all gas nozzles 3 are offset in a counterclockwise or clockwise direction, thereby better forming a certain gas circulation within the hyperbolic spherical chamber 2. More preferably, the gas nozzles 3 in the purging device are all evenly distributed circumferentially along the vertical central axis of the atomizing chamber 1 and are at the same height. In other embodiments, the gas nozzles 3 in a single purging device may also have slight deviations in height and circumferential distribution.
[0045] In this embodiment, see Figure 1 As a preferred design, the number of gas nozzles 3 in the first and third purging devices is less than the number of gas nozzles 3 in the second purging device. The specific number can be set according to actual needs. Preferably, the number of gas nozzles 3 in the first and second purging devices is 6, and the number of gas nozzles 3 in the second purging device is 12, which has a good purging effect on the powder adhering to the wall.
[0046] In this embodiment, see Figure 1 Furthermore, the gas ejected from gas nozzle 3 is in the shape of a flat fan, with the injection direction referring to the center line of the fan. The purging device can use recovered gas to reduce gas consumption and can improve the heat dissipation capacity of the powder collection chamber by using cryogenic gas.
[0047] In this embodiment, see Figure 1 As a preferred design, a backflushing device is also included. This device comprises multiple pulse backflushing nozzles 5 arranged circumferentially within the upper hemispherical chamber 21 and distributed along the central axis of the connecting circle 23. These nozzles blow air downwards towards the connecting circle 23. Since the inner walls of the upper and lower hemispherical chambers 21 and 22 may not have a smooth transition at the connecting circle 23, making powder adhesion more likely, the pulse backflushing nozzles 5 in the upper hemispherical chamber 21 apply a 0.1-0.5 second high-pressure inert gas pulse (pressure 0.6-1.2 MPa) to the connecting circle 23 at regular intervals to remove potential adhesion points. Furthermore, multiple pulse backflushing nozzles 5 are also arranged circumferentially and evenly around the central axis of the powder outlet 24 within the lower hemispherical chamber 22. These nozzles pulse-blow air onto the inner walls of the area near the powder outlet 24 to remove potential adhesion points. The pulse backflushing nozzles 5 use conical nozzles, meaning the gas they blow is in a three-dimensional conical shape. The gas pressure blown by the pulse backflush nozzle 5 is higher than that of the gas nozzle 3. The number of pulse backflush nozzles 5 is set according to the airflow coverage of potential adhesion points, and the interval time can be adjusted according to the actual production situation.
[0048] The powder collection chamber of this utility model has the following beneficial effects:
[0049] 1. By setting up a hyperbolic spherical chamber 2 and installing purging devices at three different heights, the powder adhering to the inner wall of the hyperbolic spherical chamber 2 can be effectively removed. The airflow field is optimized by the curvature gradient of the inner wall, which significantly reduces the amount of powder retained. Moreover, compared with a conical chamber, the hyperbolic spherical chamber 2 can also reduce the impact of airflow on the inner wall, effectively reducing the wear of the wall.
[0050] 2. The surface area of the hypercurvature spherical chamber 2 is reduced by about 20%-30% compared with the cylindrical or conical structure of the same volume, which directly reduces the contact area between the powder and the wall. The uniform stress distribution of the hypercurvature spherical chamber 2 significantly improves the pressure-bearing capacity compared with the conical structure, thereby improving the strength and service life of the powder collection chamber.
[0051] 3. By setting up a vibration device, the ultrasonic array on the hyperbolic spherical chamber 2 can generate spherical traveling waves, which greatly improves the vibration energy transfer efficiency compared with the conical structure and reduces the energy consumption required to peel off the adhering powder.
[0052] In summary, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.
[0053] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.
Claims
1. A powder collection chamber for a metal powder preparation atomization chamber, used to collect metal powder connected to the lower end of an atomization chamber (1), wherein the lower port of the atomization chamber (1) is circular with a diameter of D, and the axis of the lower port is vertically oriented, characterized in that: The powder collection chamber includes a hyperbolic spherical chamber (2) and a purging device. The hyperbolic spherical chamber (2) includes an upper hemisphere (21) and a lower hemisphere (22). The inner wall of the upper hemisphere (21) is a sphere with a radius of R1, and its upper end is connected to the lower port of the atomizing chamber (1). R1 is 1D to 1.4D. The inner wall of the lower hemisphere (22) is a sphere with a radius of R2, and R2 is 0.6D to 1D. The upper end of the lower hemisphere (22) is connected to the lower end of the upper hemisphere (21), and the inner cavity forms a connecting circle (23) at the connection point. The radius R3 of the connecting circle (23) is 0.5R1 to R1, and the angle between the axis of the connecting circle (23) and the vertical direction is 0 to 10°. A purge device is provided on the inner wall surface at heights a*H, b*H and c*H of the hypercurvature spherical chamber (2), and is referred to as the first purge device, the second purge device and the third purge device, respectively. The values of a, b and c are 0.7 to 1, 0.3 to 0.7 and 0 to 0.3, respectively. The purge device includes a plurality of gas nozzles (3) distributed circumferentially around the vertical central axis of the lower port of the atomizing chamber (1). The gas nozzles (3) can blow air onto the inner wall surface of the hypercurvature spherical chamber (2). The spray direction of the gas nozzles (3) in the first purge device and the second purge device is inclined downward at 0° to 90° relative to the horizontal plane, and the spray direction of the gas nozzles (3) in the third purge device is horizontal.
2. The powder collection chamber of the metal powder preparation atomization chamber according to claim 1, characterized in that: It also includes a vibration device that can cause the inner wall of the hyperbolic spherical cabin (2) to vibrate.
3. The powder collection chamber of the metal powder preparation atomization chamber according to claim 2, characterized in that: The vibration device can generate spherical standing waves on the inner wall of the hyperbolic spherical cabin (2).
4. The powder collection chamber of the metal powder preparation atomization chamber according to claim 2, characterized in that: The vibration device includes multiple sets of piezoelectric ceramic oscillators (4) embedded in the outside of the hyperbolic spherical chamber (2).
5. The powder collection chamber of the metal powder preparation atomization chamber according to claim 1, characterized in that: The jetting direction of the gas nozzle (3) of the purging device is perpendicular to the radial direction of the spherical inner cavity where the gas nozzle (3) is located.
6. The powder collection chamber of the metal powder preparation atomization chamber according to claim 1 or 5, characterized in that: The gas nozzles (3) in the first purging device, the second purging device and the third lower gas nozzle (3) device are all evenly distributed circumferentially along the vertical central axis of the lower port of the atomizing chamber (1).
7. The powder collection chamber of the metal powder preparation atomization chamber according to claim 6, characterized in that: The number of gas nozzles (3) in the first and third purging devices is less than the number of gas nozzles (3) in the second purging device.
8. The powder collection chamber of the metal powder preparation atomization chamber according to claim 1, characterized in that: The gas ejected from the gas nozzle (3) is in the shape of a flat fan.
9. The powder collection chamber of the metal powder preparation atomization chamber according to claim 1, characterized in that: It also includes a backflush device, which includes a plurality of pulse backflush nozzles (5) arranged in the inner cavity of the upper hemispherical chamber (21) and distributed in the circumferential direction along the central axis of the connecting circle (23). The pulse backflush nozzles (5) can blow air downwards to the connecting circle (23).
10. The powder collection chamber of the metal powder preparation atomization chamber according to claim 9, characterized in that: The gas ejected from the pulse backflush nozzle (5) is in the shape of a three-dimensional cone.