Nozzle atomization device for preparing spherical metal powder

Abstract

The utility model relates to a nozzle atomization device for preparing spherical metal powder. The nozzle atomization device comprises a spraying disc body of an annular structure. The first spraying disc connector is arranged in the spraying disc body, the peripheral wall of the first spraying disc connector is connected with the annular inner wall of the spraying disc body, and a center hole vertically penetrates through the middle of the first spraying disc connector. The leakage ladle containing molten metal is arranged on the top of the first spraying disc connecting body. The second spraying disc connecting body is arranged at the bottom of the spraying disc main body, an air cavity is formed between the second spraying disc connecting body and the first spraying disc connecting body, and the air cavity communicates with the air inlet; a circular seam is formed between the inner ring of the second spraying disc connector and the side edge of the bottom of the first spraying disc connector; the nozzle atomization device is arranged in a split mode, the first spraying disc connecting body is arranged in the spraying disc body, the second spraying disc connecting body is arranged at the bottom of the spraying disc body, and an air cavity and a circular seam are formed between the first spraying disc connecting body and the second spraying disc connecting body. And after being damaged, the first spraying disc connecting body or the second spraying disc connecting body can be independently replaced, so that the maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to a metal powder preparation apparatus, and in particular to a nozzle atomization device for preparing spherical metal powder. Background Technology

[0002] If the nozzle or annular slit of an existing metal atomization device is damaged during use, it will be unable to continue producing alloy powder efficiently; therefore, the entire spray disc needs to be replaced. However, the existing atomizing spray discs are expensive, making replacement costly.

[0003] In summary, reducing repair costs after circumferential seam damage has become an urgent problem for researchers in this field. Utility Model Content

[0004] The technical problem this invention aims to solve is: how to reduce repair costs when the circumferential seam is damaged;

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] This utility model relates to a nozzle atomizing device for preparing spherical metal powder, comprising: a ring-shaped spray disc body with an air inlet penetrating through its side wall; a first spray disc connector disposed within the spray disc body, its outer peripheral wall connected to the annular inner wall of the spray disc body, and a central hole vertically penetrating through its center; a molten metal sump disposed at the top of the first spray disc connector, its bottom communicating with the central hole; a second spray disc connector disposed at the bottom of the spray disc body, forming an air cavity between itself and the first spray disc connector, the air cavity communicating with the air inlet; the bottom surface of the second spray disc connector is flush with the bottom surface of the first spray disc connector, and an annular seam is formed between the inner ring of the second spray disc connector and the bottom side edge of the first spray disc connector;

[0007] In this design, the nozzle atomizing device is a separate unit. The first spray disc connector is located inside the main body of the spray disc, and the second spray disc connector is located at the bottom of the main body of the spray disc. An air cavity and annular gap are formed between the first and second spray disc connectors. Molten metal flows out through the bottom of the auger and the central hole. During the outflow of the molten metal, high-pressure gas is injected into the molten metal through the air inlet, air cavity, and annular gap to break and impact the molten metal, thereby achieving the preparation of metal powder.

[0008] Because this solution is a modular design, the first or second spray disc connector can be replaced individually if damaged. Compared to replacing the entire unit, this replacement method reduces maintenance costs.

[0009] To achieve secondary crushing of metal powder, this utility model employs a first ultrasonic atomizing device and a second ultrasonic atomizing device positioned opposite each other below the second spray disc connector; wherein, the first ultrasonic atomizing device and the second ultrasonic atomizing device are symmetrically arranged about the axis of the central hole, and the distance between the emitting ends of the first ultrasonic atomizing device and the second ultrasonic atomizing device is greater than the diameter of the annular gap.

[0010] The first and second ultrasonic atomizing devices are located below the second spray disc connector. Based on the primary atomization of the nozzle, the ultrasonic waves emitted by the ultrasonic atomizing devices are used to further break up the molten metal droplets, thereby achieving a better powdering effect. This structural layout increases the airflow velocity while preventing the airflow velocity from diverging. Furthermore, the device is easy to disassemble, making nozzle cleaning simpler and more convenient.

[0011] In order to reduce the solidification rate of the metal solution, this invention employs a third ultrasonic atomizing device on the outer wall of the leak bag to drive its vibration.

[0012] The third ultrasonic atomizing device is installed on the wall of the slurry to slow down the solidification rate of the metal solution and improve the utilization efficiency of the metal solution.

[0013] In order to ensure that the gas in the air chamber can be ejected smoothly without turbulence, this invention adopts an arc-shaped guide surface on the bottom side of the first spray disc connector; the gas can be ejected smoothly along the guide surface, avoiding turbulence.

[0014] To further increase the flow rate of the gas ejected at the annular gap, this utility model adopts a protrusion at the inner ring of the second spray disc connector, and the protrusion and part of the guide surface form the annular gap; along the direction of airflow ejection from the annular gap, the spacing at the inlet and outlet of the annular gap is greater than the spacing at the middle of the annular gap;

[0015] The sidewalls of the protrusions are approximately wavy, so the spacing at the entrance and exit of the annular slits is greater than the spacing in the middle of the annular slits, forming a Laval nozzle structure, which further increases the speed of the airflow.

[0016] The beneficial effects of this utility model are as follows: This utility model is a nozzle atomizing device for preparing spherical metal powder. The nozzle atomizing device is set in two parts. The first spray disc connector is set inside the spray disc body, and the second spray disc connector is set at the bottom of the spray disc body. An air cavity and annular gap are formed between the first spray disc connector and the second spray disc connector. The first spray disc connector or the second spray disc connector can be replaced separately after damage. Compared with the whole replacement method, the replacement method of this device can reduce maintenance costs. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the utility model.

[0019] Figure 2 yes Figure 1 Enlarged view of point A;

[0020] In the figure: 1-Third ultrasonic atomizing device, 2-Leaking bag, 3-First spray disc connector, 31-Guide surface, 4-Central hole, 5-Spray disc body, 6-Air chamber, 7-Air inlet, 9-Second spray disc connector, 91-Protrusion, 10-Circumferential seam, 11-First ultrasonic atomizing device, 12-Second ultrasonic atomizing device, 21-Inlet, 22-Outlet, 23-Middle part. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0022] like Figure 1 As shown, this utility model is a nozzle atomizing device for preparing spherical metal powder, comprising: a ring-shaped spray disc body 5, with an air inlet 7 penetrating through its side wall; a first spray disc connector 3, disposed within the spray disc body 5, its outer peripheral wall connected to the annular inner wall of the spray disc body 5, and a central hole 4 vertically penetrating through its center; a molten metal sump 2, disposed at the top of the first spray disc connector 3, its bottom communicating with the central hole 4; a second spray disc connector 9, disposed at the bottom of the spray disc body 5, forming an air cavity 6 between it and the first spray disc connector 3, the air cavity 6 communicating with the air inlet 7; the bottom surface of the second spray disc connector 9 is flush with the bottom surface of the first spray disc connector 3, and an annular seam 10 is formed between the inner ring of the second spray disc connector 9 and the bottom side edge of the first spray disc connector 3;

[0023] In this design, the nozzle atomizing device is a separate unit. The first spray disc connector 3 is located inside the spray disc body 5, and the second spray disc connector 9 is located at the bottom of the spray disc body 5. An air chamber 6 and an annular seam 10 are formed between the first spray disc connector 3 and the second spray disc connector 9. Molten metal flows out through the bottom of the sprue 2 and the central hole 4. During the outflow of the molten metal, high-pressure gas is sprayed and impacted onto the molten metal through the air inlet 7, the air chamber 6, and the annular seam 10, thereby breaking and impacting the molten metal and thus preparing metal powder.

[0024] Because this solution is a modular design, either the first spray disc connector 3 or the second spray disc connector 9 can be replaced individually if damaged. Compared to replacing the entire device, this replacement method can reduce maintenance costs.

[0025] like Figure 1 As shown, in order to achieve secondary crushing of metal powder, the present invention employs a first ultrasonic atomizing device 11 and a second ultrasonic atomizing device 12 arranged opposite each other below the second spray disc connector 9; wherein, the first ultrasonic atomizing device 11 and the second ultrasonic atomizing device 12 are symmetrically arranged about the axis of the central hole 4, and the distance between the emitting ends of the first ultrasonic atomizing device 11 and the second ultrasonic atomizing device 12 is greater than the diameter of the annular slit 10;

[0026] The first ultrasonic atomizing device 11 and the second ultrasonic atomizing device 12 are located below the second spray disc connector 9. Based on the primary atomization of the nozzle, the ultrasonic waves emitted by the ultrasonic atomizing device are used to break up the metal droplets a second time to achieve a better powdering effect. This structural layout increases the airflow velocity while keeping the airflow velocity from diverging. In addition, the device is easy to disassemble, making nozzle cleaning simpler and more convenient.

[0027] like Figure 1 As shown, in order to reduce the solidification rate of the metal solution, this utility model adopts a third ultrasonic atomizing device 1 that drives the vibration of the outer wall of the leak bag 2.

[0028] The third ultrasonic atomizing device 1 is installed on the wall of the leak bag 2, with the aim of slowing down the solidification rate of the metal solution and improving the utilization efficiency of the metal solution.

[0029] like Figure 1 As shown, in order to smoothly eject the gas in the air chamber without turbulence, this utility model adopts an arc-shaped guide surface 31 on the bottom side of the first spray disc connector 3; the gas can be smoothly ejected along the guide surface 31, avoiding turbulence.

[0030] like Figure 1-2 As shown, in order to further increase the flow rate of the gas ejected at the annular gap, the present invention adopts a protrusion 91 on the inner ring of the second spray disc connector 9, and the protrusion 91 and part of the guide surface 31 form the annular gap 10; along the direction of airflow ejection from the annular gap 10, the spacing at the inlet 21 and the spacing at the outlet 22 of the annular gap 10 are greater than the spacing at the middle 23 of the annular gap 10.

[0031] The sidewalls of the protrusions are approximately wavy, so the spacing at the entrance and exit of the annular slits is greater than the spacing in the middle of the annular slits, forming a Laval nozzle structure, which further increases the speed of the airflow.

[0032] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A nozzle atomizing device for preparing spherical metal powder, characterized in that, include: The main body of the ring-shaped spray disc has an air inlet through its side wall; The first spray disc connector is disposed inside the spray disc body, and its outer peripheral wall is connected to the annular inner wall of the spray disc body. A central hole is vertically opened through its middle part. A leaky bag containing molten metal is positioned on top of the first spray plate connector, with its bottom communicating with the central hole. The second spray disc connector is disposed at the bottom of the spray disc body, and forms an air cavity between it and the first spray disc connector, the air cavity being connected to the air inlet; The bottom surface of the second spray disc connector is flush with the bottom surface of the first spray disc connector, and an annular seam is formed between the inner ring of the second spray disc connector and the bottom side of the first spray disc connector.

2. The nozzle atomizing device for preparing spherical metal powder according to claim 1, characterized in that, Below the second spray disc connector are a first ultrasonic atomizing device and a second ultrasonic atomizing device. The first ultrasonic atomizing device and the second ultrasonic atomizing device are symmetrically arranged about the axis of the central hole, and the distance between the transmitting ends of the first ultrasonic atomizing device and the second ultrasonic atomizing device is greater than the diameter of the annular slit.

3. The nozzle atomizing device for preparing spherical metal powder according to claim 1, characterized in that, The outer wall of the leak bag is provided with a third ultrasonic atomizing device to drive its vibration.

4. The nozzle atomizing device for preparing spherical metal powder according to claim 1, characterized in that, The bottom side of the first spray disc connector is an arc-shaped guide surface.

5. The nozzle atomizing device for preparing spherical metal powder according to claim 4, characterized in that, The inner ring of the second spray disc connector is provided with a protrusion, and the protrusion and part of the guide surface form the annular seam; Along the direction of airflow ejection from the annular gap, the spacing at the inlet and outlet of the annular gap is greater than the spacing at the middle of the annular gap.

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