Plugging pouring type gas atomization pulverizing device
By real-time monitoring and adjustment of the gas atomization process, the problem of the inability to provide real-time feedback on the gas-liquid ratio parameters in the existing technology is solved, ensuring that the particle size and morphology of the finished metal powder are uniform and the sphericity is high, ensuring that the particle size and morphology of the finished metal powder are uniform and the sphericity is high, ensuring that the particle size and morphology of the finished metal powder are evenly distributed and the sphericity is high, ensuring that the particle size and morphology of the finished metal powder are evenly distributed and the sphericity is high, ensuring that the particle size and morphology of the finished metal powder are evenly distributed and the sphericity is high, thereby improving the atomization efficiency and the quality of the finished metal powder.
Patent Information
- Application Number
- CN202422024058.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-08-20
AI Technical Summary
The existing plug-in pouring device cannot provide real-time feedback on the gas-liquid ratio parameters during the aerosol powder making process, resulting in unstable metal powder quality, loose sealing, leakage in the liquid guide part, and poor atomization working stability, affecting production efficiency and cost.
A plug-and-pour gas atomization powder making device was designed, which includes a melting part, a liquid guide part, a plug rod, an atomizing nozzle, and a feedback adjustment component. Position sensing, gas flow, and temperature sensing components are used to monitor and adjust the gas-liquid ratio in real time to ensure sufficient atomization of the metal melt. The atomization efficiency and stability are improved through thermal insulation and limiting structures.
The metal powder has uniform particle size and high sphericity, which improves the atomization efficiency and the quality of the finished metal powder, ensures the stability of the system and reduces production costs.
Smart Images
Figure CN223352946U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a plug-pulling and pouring type gas atomization powder making device, belonging to the technical field of atomization powder making. Background Art
[0002] In recent years, with the rapid development of 3D printing technology, powder properties such as high sphericity, good flowability, high purity, and a low percentage of hollow powder have become important technical indicators for 3D printing powder raw materials. Gas atomization is the primary method for preparing spherical powders of various alloys, including iron-, nickel-, copper-, and aluminum-based materials. Gas atomization uses high-velocity inert gas to impinge on a stream of molten metal, forming fine metal droplets that solidify into powder particles. At present, plug pouring is one of the commonly used pouring methods in the aerosol powder making process. In the aerosol powder making process, the gas-liquid ratio is an important parameter, which refers to the proportional relationship between the volume or mass of gas and liquid in the powder making process. The choice of gas-liquid ratio will directly affect the quality of the powder and the efficiency of the process. However, in actual atomization work, it is not possible to provide real-time feedback on the gas-liquid ratio parameters. The atomization parameters can only be adjusted by observing the prepared metal powder. The adjustment is too delayed, resulting in poor quality and unstable quality of the metal powder produced, which reduces the process efficiency and increases the production and operation costs. In addition, the existing plug pouring device will also have problems such as loose sealing, leakage in the liquid guide part, poor overall atomization working stability and short service life. Therefore, it is of great practical significance to study a new type of plug pouring aerosol powder making device. Utility Model Content
[0003] The utility model aims to solve the deficiencies in the prior art and provides a plug-pulling and pouring type aerosolized powder making device.
[0004] The utility model solves the above-mentioned technical problems with the following technical solutions: a plug-casting type aerosol powder making device, comprising a melting portion, a through hole being formed at the bottom end of the melting portion; a liquid guiding portion, the liquid guiding portion comprising a first end and a second end having the same axis but different outer diameters, a melt flow channel penetrating the liquid guiding portion being provided inside the first end and the second end, the upper end of the melt flow channel being provided with an inwardly concave conical inlet, the height H1 of the first end being greater than the thickness H2 of the bottom end of the melting portion, and the outer surface of the first end cooperating with the through hole to fix the liquid guiding portion; A plug rod, the upper end of which is connected to a driving mechanism, and the lower end of which is provided with a mating portion, the mating portion being adapted to the tapered inlet for opening or closing the melt flow channel; an atomizing nozzle, the atomizing nozzle being connected to a gas pipeline, the atomizing nozzle being sleeved on the second end, and the upper end face of the atomizing nozzle abutting against the lower end face of the first end; a feedback adjustment component, the feedback adjustment component comprising a control unit, a position sensing component provided on the plug rod, and a gas flow sensing component and a gas flow adjustment component sequentially provided along the gas pipeline.
[0005] Furthermore, the outer diameter D4 of the first end is 1.8-2.2 times the outer diameter D5 of the second end.
[0006] Furthermore, the height H1 of the first end is 1.4-2.0 times the thickness H2 of the bottom end of the melting portion.
[0007] Furthermore, the upper end surface of the first end is not higher than the upper end surface of the bottom end of the melting portion, and the angle α between the conical inlet and the axis of the liquid guiding portion is 30 degrees to 40 degrees.
[0008] Furthermore, the outer diameter D1 of the stopper rod is smaller than the inner diameter D2 of the top of the tapered inlet.
[0009] Furthermore, the relationship among the outer diameter D1 of the stopper rod, the inner diameter D2 of the top of the tapered inlet, and the diameter D3 of the melt flow channel satisfies D1:D2:D3=(3.5-3.9):(4-4.5):1.
[0010] Furthermore, the plug rod has an internal hollow structure and is made of ceramic material.
[0011] Furthermore, the matching portion is a semicircular protrusion with an arc cross section, and the diameter of the matching portion is the same as the outer diameter D1 of the plug rod.
[0012] Furthermore, the feedback adjustment component also includes a gas temperature sensing component arranged between the gas flow sensing component and the gas flow adjustment component, and a melt level sensing component arranged in the melting part.
[0013] Furthermore, the gas flow sensing component is a gas flow sensor, the gas flow regulating component is an electromagnetic proportional valve, the gas temperature sensing component is a gas temperature sensor, the position sensing component is a displacement sensor, and the melt level sensing component is a visual sensor.
[0014] The beneficial effects of the utility model are:
[0015] (1) Through the above settings, the atomization process can be monitored and the gas-liquid ratio can be adjusted at any time according to the feedback information so that the metal melt is fully atomized, thereby achieving the best atomization effect and ensuring that the finished metal powder particle size is evenly distributed and has high sphericity.
[0016] (2) Through the above settings, heat insulation can be achieved to avoid the influence of heat transfer from the melting part on the atomizing nozzle, and the superheat of the metal melt can be better maintained. The position of the liquid guide part can also be limited to avoid the liquid guide part being twisted by the lateral force of the high-speed cold air flow during atomization and powder making, thereby ensuring the stability of the system during atomization operation and effectively improving the atomization efficiency and the quality of the finished metal powder. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic structural diagram of an embodiment of the utility model;
[0018] Figure 2 A cross-sectional view of the liquid guide portion provided in an embodiment of the present utility model;
[0019] Figure 3 A cross-sectional view of the melting portion provided in an embodiment of the present utility model;
[0020] Figure 4 A cross-sectional view of a tapered inlet provided in an embodiment of the present utility model;
[0021] Figure 5 A cross-sectional view of a stopper rod provided in an embodiment of the present utility model.
[0022] Figure markings: 1. melting part; 11. through hole; 2. liquid guiding part; 21. first end; 22. second end; 23. melt flow channel; 231. conical flow inlet; 3. plug rod; 31. matching part; 4. atomizing nozzle; 41. gas pipeline; 5. position sensing component; 6. gas flow sensing component; 7. gas flow regulating component; 8. gas temperature sensing component; 9. melt level sensing component. DETAILED DESCRIPTION
[0023] The following is a detailed description of the specific embodiments of the present invention. The present invention can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed.
[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used are only for describing specific embodiments and are not intended to limit the present invention.
[0025] like Figure 1-Figure 3As shown, the utility model provides a plug-casting type aerosol powder making device, comprising a melting part 1, wherein the melting part 1 is a container for melting metal with a hollow top opening and a through hole 11 at the bottom; a liquid guide part 2, wherein the liquid guide part 2 comprises a first end 21 and a second end 22 having the same axis but different outer diameters, specifically, the outer diameter of the first end 21 is greater than the outer diameter of the second end 22, and a melt flow channel 23 passing through the liquid guide part 2 is provided inside the first end 21 and the second end 22, the melt flow channel 23 is used for circulating the metal melt, and the melt flow channel 23 is coaxially arranged with the liquid guide part 2, and the upper end of the melt flow channel 23 is provided with a The conical inlet 231 is recessed inward. It should be noted that in the present invention, the upper end is the end close to the melting part 1, and the lower end is the end away from the melting part 1. The height H1 of the first end 21 is greater than the thickness H2 of the bottom end of the melting part 1. The outer surface of the first end 21 and the through hole 11 are fixed to the liquid guide part 2 by an interference fit, and the metal melt enters the atomizing chamber below through the liquid guide part 2; the plug rod 3, the upper end of the plug rod 3 is connected to a driving mechanism. It should be noted that the driving mechanism can be driven by a motor, a cylinder or a hydraulic drive as long as it can drive the plug rod 3 to move up and down, because the specific driving method is common knowledge in the field , so it is not marked in the drawings. The lower end of the plug rod 3 is provided with a matching portion 31. When the atomization operation needs to be stopped, the plug rod 3 moves downward to drive the matching portion 31 to contact the tapered flow inlet 231, closing the melt flow channel 23; when the atomization operation needs to be started, the plug rod 3 moves upward to drive the matching portion 31 away from the tapered flow inlet 231; the atomizing nozzle 4, the atomizing nozzle 4 is connected to the gas pipeline 41, the atomizing nozzle 4 is sleeved on the second end 22, preferably, the atomizing nozzle 4 and the second end 22 are interference fit, and the upper end surface of the atomizing nozzle 4 is in contact with the lower end surface of the first end 21 Abutment; a feedback adjustment component, the feedback adjustment component includes a control unit, a position sensing component 5 arranged on the plug rod 3, and a gas flow sensing component 6 and a gas flow adjustment component 7 arranged in sequence along the gas pipeline 41. It should be pointed out that the control unit is generally arranged outside the control room or the atomization powder making system, so it is not marked in the accompanying drawings; the control unit is connected to control the gas flow sensing component 6, the position sensing component 5, the gas flow adjustment component 7 and the driving mechanism, and the atomization gas flow is adjusted through the gas flow adjustment component 7 according to the feedback information of the gas flow sensing component 6 and the position sensing component 5.
[0026] Through the above settings, firstly, the atomization process can be monitored, and the gas-liquid ratio can be adjusted at any time according to the feedback information, so that the metal melt is fully atomized, thereby achieving the best atomization effect and ensuring that the particle size and morphology of the finished metal powder are evenly distributed and the sphericity is high; secondly, by setting the liquid guide part 2 to have the same axis but different outer diameters of the first end 21 and the second end 22, it is possible to connect the liquid guide part 2 with the atomizing nozzle 4 and the melting part 1, so that there is a gap between the atomizing nozzle 4 and the melting part 1, thereby achieving heat insulation and avoiding the melt The heat transfer of the melting part 1 affects the atomizing nozzle 4. Because the outer diameter of the first end 21 is large, the metal melt can better maintain its superheat when flowing through the part of the liquid guiding part 2 located between the atomizing nozzle 4 and the melting part 1. Also, because the upper end face of the atomizing nozzle 4 abuts against the lower end face of the first end 21, the liquid guiding part 2 is limited, avoiding the liquid guiding part 2 from twisting due to the lateral force of the high-speed cold air flow during atomization and powder making, thereby ensuring the stability of the system during atomization operation and effectively improving the atomization efficiency and the quality of the finished metal powder.
[0027] Specifically, such as Figure 2 As shown, the outer diameter D4 of the first end 21 is 1.8-2.2 times the outer diameter D5 of the second end 22. The above setting directly affects the quality of the finished metal powder obtained by atomization. If the outer diameter D4 of the first end 21 is less than 1.8 times the outer diameter D5 of the second end 22, the range of the lower end surface of the first end 21 used to abut the atomizing nozzle 4 is small, and the working stability of the liquid guide part 2 during atomization powder making cannot be ensured, and the superheat of the metal melt cannot be maintained, which will directly affect the atomization quality, resulting in uneven quality of the finished metal powder, low sphericity and fine powder rate; if the outer diameter D4 of the first end 21 is greater than 2.2 times the outer diameter D5 of the second end 22, although the insulation effect of the metal melt is better at this time, the size of the through hole 11 becomes larger accordingly, resulting in uneven stress at the bottom end of the melting part 1, further shortening the service life of the melting part 1, and the large size of the liquid guide part 2 will also increase production and operation costs.
[0028] Specifically, such as Figure 2 and Figure 3As shown, the height H1 of the first end 21 is 1.4-2.0 times the thickness H2 of the bottom end of the melting portion 1. Since the melting portion 1 and the atomizing nozzle 4 are connected and matched with the liquid guide portion 2, it is very important to set the above size range. If the distance between the melting portion 1 and the atomizing nozzle 4 is relatively close, for example, the height H1 is less than 1.4 times the thickness H2, the atomizing nozzle 4 is subjected to high heat. During the long atomization process, the probability of the atomizing nozzle 4 being deformed by heat and affecting the atomization efficiency increases. If the distance between the melting portion 1 and the atomizing nozzle 4 is relatively far, for example, the height H1 is greater than 2.0 times the thickness H2, although the atomizing nozzle 4 is The heat resistance is low, but the distance is too long, which not only leads to the uncompact structure of the overall atomizing powder making device, but also causes the liquid guiding part 2 to be subjected to excessive impact stress from the lateral high-speed airflow during the atomization process, thereby increasing the probability of damage to the liquid guiding part 2. Only when the height H1 of the first end 21 is 1.4-2.0 times the thickness H2 of the bottom end of the melting part 1, can the distance between the atomizing nozzle 4 and the melting part 1 be coordinated to ensure the system stability during atomization and the quality of the finished metal powder, while avoiding damage to related atomizing components and reducing production and operation costs.
[0029] Specifically, such as Figure 1 As shown, the upper end surface of the first end 21 is not higher than the upper end surface of the bottom end of the melting part 1. It can be understood that the liquid guide part 2 is lower than or flush with the upper end surface of the bottom end of the melting part 1. The above arrangement takes into account that when the metal melt passes through the liquid guide part 2 and enters the atomizing chamber, the metal melt will not be retained at the bottom end of the melting part 1, thereby avoiding waste of metal material; preferably, as Figure 4 As shown, the angle α between the conical inlet 231 and the axis of the liquid guiding portion 2 is 30 degrees to 40 degrees. When the angle α is within this range, the metal melt is easier to flow into the liquid guiding portion 2, and the probability of the liquid flow being scattered when the metal melt flows into the liquid guiding portion 2 can be reduced, so that the metal melt can enter the atomization chamber evenly and stably, further ensuring the quality of the atomized finished metal powder.
[0030] Specifically, such as Figure 4 and 5As shown, the outer diameter D1 of the stopper rod 3 is smaller than the inner diameter D2 of the top of the tapered inlet 231. This arrangement allows the tapered inlet 231 to act as a guide when the melt channel 23 needs to be closed, preventing the stopper rod 3 from failing to effectively seal the melt channel 23 in a timely manner. Preferably, the relationship between the outer diameter D1 of the stopper rod 3, the inner diameter D2 of the top of the tapered inlet 231, and the diameter D3 of the melt channel 23 satisfies D1:D2:D3 = (3.5-3.9):(4-4.5):1. The utility model is defined by the above relationship, and its role is to further coordinate the stability of the atomization process. Under the condition of ensuring that the plug rod 3 can timely and effectively open or close the melt flow channel 23, by limiting the relationship between the inner diameter D2 of the top of the tapered inlet 231 and the diameter D3 of the melt flow channel 23, it can further reduce the probability of liquid flow dispersion when the metal melt flows into the liquid guide part 2, and can ensure that when the metal melt flows through the melt flow channel 23, it can fill the melt flow channel 23 in the radial direction, so that the metal melt washes away the attachments on the inner wall of the melt flow channel 23 during the flow process, avoiding excessive accumulation of attachments, affecting the quality of the atomized finished metal powder or blocking the melt flow channel 23.
[0031] Specifically, such as Figure 5 As shown, the interior of the plug rod 3 is a hollow structure. This setting can reduce the heat conduction of the plug rod 3. The plug rod 3 is made of ceramic material, which can avoid the influence of high-temperature metal melt on the plug rod 3. Preferably, the matching portion 31 is a semicircular protrusion with an arc cross-section. The diameter of the matching portion 31 is the same as the outer diameter D1 of the plug rod 3. The matching portion 31 and the plug rod 3 can be an integral structure formed by processing, or can be connected by an adhesive. By setting the cross-section of the matching portion 31 to be semicircular, it can not only avoid damage to its surface due to stress concentration, but also when the matching portion 31 and the tapered flow inlet 231 cooperate to seal the melt flow channel 23, the matching portion 31 applies a certain outward pressure to the side wall of the tapered flow inlet 231. As a reaction force, the tapered flow inlet 231 generates pressure on the matching portion 31 toward the inside of the matching portion 31, so that the area of the matching portion 31 subjected to the maximum force is located inside it, thereby reducing the probability of damage to the matching portion 31 and extending its service life.
[0032] Specifically, such as Figure 1As shown, the feedback adjustment component also includes a gas temperature sensing component 8 arranged between the gas flow sensing component 6 and the gas flow regulating component 7, and a melt level sensing component 9 arranged in the melting part 1. The above-mentioned setting takes into account the influence of gas temperature on density. By setting the gas temperature sensing component 8 for real-time feedback of the atomizing gas temperature, more accurate atomizing gas detection can be achieved, further ensuring the stability of the gas-liquid ratio during atomization and the quality of the finished metal powder. The gas flow sensing component 6 can be a gas flow monitor, a gas flow sensor, a velocity tube or other gas flow measurement tools. Preferably, the gas flow sensing component 6 is a gas flow sensor, the gas flow regulating component 7 is an electromagnetic proportional valve, the gas temperature sensing component 8 is a gas temperature sensor, the position sensing component 5 is a displacement sensor, and the melt level sensing component 9 is a visual sensor.
[0033] Specific implementation process:
[0034] Before atomization and powder making, the metal raw material is first placed in the melting part 1 and melted into a metal melt. After reaching the superheat required by the process, the plug rod 3 is controlled to move upward, the melt flow channel 23 is opened, and the metal melt enters the atomization chamber through the melt flow channel 23, and is then atomized and cooled into metal powder by the atomizing gas. The control unit provides real-time feedback on parameters such as gas flow, gas temperature, and metal melt quality during the atomization process, and compares them with standard parameters. If they are within the allowable deviation range, the controller continues to compare the real-time mass flow rate of the metal melt and the atomizing gas with the set mass flow rate; if they are not within the allowable deviation range, the controller outputs a regulation signal to the gas flow regulating component 7 of the gas pipeline 41, or increases or decreases the insertion depth of the plug rod 3 to increase or decrease the mass flow rate of the metal melt, thereby controlling the atomization process.
[0035] The technical features of the above-described embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are exhaustively listed. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0036] For ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all fall within the scope of protection of the utility model. The scope of protection of the utility model shall be based on the attached claims.
Claims
1. A plug-in pouring type aerosol powder making device, characterized in that: include: A melting portion, wherein a through hole is formed at the bottom end of the melting portion; A liquid guide portion, the liquid guide portion including a first end and a second end having the same axis but different outer diameters, a melt flow channel being provided inside the first end and the second end, the melt flow channel being provided with an inwardly concave tapered inlet, the height H1 of the first end being greater than the thickness H2 of the bottom end of the melting portion, and the outer surface of the first end cooperating with the through hole to secure the liquid guide portion; A stopper rod, wherein the upper end of the stopper rod is connected to a driving mechanism, and the lower end is provided with a matching portion, the matching portion being adapted to the tapered flow inlet for opening or closing the melt flow channel; an atomizing nozzle, the atomizing nozzle being connected to a gas pipeline, the atomizing nozzle being sleeved on the second end, and the upper end surface of the atomizing nozzle abutting against the lower end surface of the first end; A feedback regulation component includes a control unit, a position sensing component arranged on the plug rod, and a gas flow sensing component and a gas flow regulating component arranged in sequence along the gas pipeline.
2. The plug-casting type aerosol powder making device according to claim 1, characterized in that: The outer diameter D4 of the first end is 1.8-2.2 times the outer diameter D5 of the second end.
3. The plug-casting type aerosol powder making device according to claim 1, characterized in that: The height H1 of the first end is 1.4-2.0 times the thickness H2 of the bottom end of the melting portion.
4. The plug-casting type aerosol powder making device according to claim 1, characterized in that: The upper end surface of the first end is not higher than the upper end surface of the bottom end of the melting portion, and the angle α between the tapered inlet and the axis of the liquid guiding portion is 30 degrees to 40 degrees.
5. The plug-casting type aerosol powder making device according to claim 4, characterized in that: The outer diameter D1 of the plug rod is smaller than the inner diameter D2 of the top of the tapered inlet.
6. The plug-casting type aerosol powder making device according to claim 5, characterized in that: The relationship among the outer diameter D1 of the stopper rod, the inner diameter D2 of the top of the tapered inlet and the diameter D3 of the melt flow channel satisfies D1:D2:D3=(3.5-3.9):(4-4.5):
1.
7. The plug-casting type aerosol powder making device according to claim 1, characterized in that: The plug rod has an internal hollow structure and is made of ceramic material.
8. The plug-casting type aerosol powder making device according to claim 7, characterized in that: The matching portion is a semicircular protrusion with an arc cross section, and the diameter of the matching portion is the same as the outer diameter D1 of the plug rod.
9. The plug-casting type aerosol powder making device according to claim 1, characterized in that: The feedback adjustment component further includes a gas temperature sensing component arranged between the gas flow sensing component and the gas flow adjustment component, and a melt level sensing component arranged in the melting part.
10. The plug-casting type aerosol powder making device according to claim 9, characterized in that: The gas flow sensing component is a gas flow sensor, the gas flow regulating component is an electromagnetic proportional valve, the gas temperature sensing component is a gas temperature sensor, the position sensing component is a displacement sensor, and the melt level sensing component is a visual sensor.