Atomizer nozzle assembly

Abstract

The utility model relates to the technical field of aluminum powder atomizers, in particular to an atomizer nozzle assembly which comprises a nozzle body, and the nozzle body comprises a molten aluminum circulation body, a primary air cavity wrapping body and a secondary air cavity wrapping body. The replaceable nozzle is composed of a round pipe section, a flange section connected with the lower end of the round pipe section and an upper bent section connected with the outer edge of the flange section, a limiting spigot corresponding to the round pipe section is formed in the lower edge of the inner circumferential face of the molten aluminum circulation body, and a plurality of primary airflow inlets corresponding to the primary impact flow channels are formed in the outer circumferential wall of the round pipe section. A plurality of secondary airflow inlets corresponding to the secondary impact runners are formed in the peripheral wall of the round pipe section, an annular positioning table located on the inner side of the upper bent section of the replaceable nozzle is arranged at the lower end of the secondary air cavity wrapping body, and the flange section of the replaceable nozzle is connected and fixedly connected with the bottom face of the annular positioning table. When the nozzle is blocked, the nozzle main body does not need to be replaced, so that the use cost is saved.

Description

Technical Field

[0001] This utility model relates to the field of aluminum powder atomizer technology, specifically to an atomizer nozzle assembly. Background Technology

[0002] Currently, dual-flow atomization is the main method for producing metal powder. Its working principle is as follows: an atomizer breaks molten metal into fine powder, which is then rapidly cooled and solidified to form metal powder. The atomizing nozzle is the core component of the atomizer. Specifically, the central part of the nozzle is the aluminum molten material channel, while the outer side of the nozzle has an inert gas inlet and a gas flow channel. High-pressure inert gas flows out at high speed from the gas flow channel, impacting the molten aluminum flowing out of the aluminum channel, thus atomizing the aluminum into aluminum powder. The effectiveness of the atomizing nozzle directly determines the product quality. To improve product quality, improvements to the atomizing nozzle have been ongoing in recent years.

[0003] For example, CN 208195655 U discloses an atomizing nozzle for aluminum powder production, which includes an inner nozzle body, a middle nozzle body, and an outer nozzle body. The middle nozzle body is fitted outside the inner nozzle body, and the outer nozzle body is fitted outside the middle nozzle body. The inner nozzle body is a hollow tubular structure with its inner cavity serving as an aluminum liquid flow channel. The middle nozzle body is connected to the inner nozzle body, forming a primary impact gas chamber and a primary impact flow channel between the inner and middle nozzle bodies. A secondary impact gas chamber and a secondary impact flow channel are formed between the outer nozzle body and the middle nozzle body. The outlet of the aluminum liquid flow channel, the outlet of the primary impact flow channel, and the outlet of the secondary impact flow channel are arranged sequentially along the aluminum liquid flow direction. This atomizing nozzle adds a gas flow channel to the traditional primary atomizing nozzle, subjecting the primary atomized aluminum liquid to a secondary high-pressure impact, thereby making the atomized aluminum powder particles finer and improving the yield of ultrafine aluminum powder. However, the following problem still exists: when the nozzle tip is blocked due to impurities in the aluminum liquid, the entire nozzle needs to be replaced, resulting in resource waste. Utility Model Content

[0004] The purpose of this invention is to provide a reasonably structured and reliable atomizer nozzle assembly that solves the above problems. When the nozzle becomes clogged, there is no need to replace the nozzle body, thus saving on usage costs.

[0005] The technical solution of this utility model is:

[0006] Atomizer nozzle assembly includes a nozzle body, the nozzle body comprising an aluminum liquid flow body, a primary gas chamber surround disposed outside the aluminum liquid flow body, and a secondary gas chamber surround disposed outside the primary gas chamber surround. A primary impact flow channel is formed between the lower edge of the inner circumferential surface of the primary gas chamber surround and the lower edge of the outer circumferential surface of the aluminum liquid flow body, and a secondary impact flow channel is formed between the lower edge of the inner circumferential surface of the secondary gas chamber surround and the lower edge of the outer circumferential surface of the primary gas chamber surround. The key technical feature is that the lower end of the nozzle body is provided with a replaceable nozzle concentric with it. The replaceable nozzle consists of a circular tube section inserted into the lower end of the nozzle body, a flange section connected to the lower end of the circular tube section, and a... The flange section is connected to the upper bend section. The lower edge of the inner circumferential surface of the aluminum liquid flow body is provided with a limiting stop corresponding to the circular pipe section. The outer circumferential wall of the circular pipe section is provided with multiple primary airflow inlets corresponding to the primary impact flow channel. Each primary airflow inlet is evenly arranged around the center line of the circular pipe section. The outer circumferential wall of the circular pipe section is provided with multiple secondary airflow inlets corresponding to the secondary impact flow channel. Each secondary airflow inlet is evenly arranged around the center line of the circular pipe section. The lower end of the secondary air chamber surround is provided with an annular positioning platform located inside the upper bend section of the replaceable nozzle. The flange section of the replaceable nozzle is connected and fixed to the bottom surface of the annular positioning platform.

[0007] In the aforementioned atomizer nozzle assembly, a mounting flange is provided at the inlet of the aluminum liquid flow body, and an annular thickening platform is provided along the outer circumferential surface of the aluminum liquid flow body at the connection with the mounting flange. The outer circumferential surface of the annular thickening platform is provided with a first threaded connection structure that connects to the primary air chamber wrapping body, and the upper end face of the primary air chamber wrapping body is provided with a first sealing structure that connects to the mounting flange.

[0008] The atomizer nozzle assembly described above has a second threaded connection structure at the middle of the outer peripheral surface of the primary air chamber wrapping body, which is connected to the secondary air chamber wrapping body. A limiting stop surface corresponding to the secondary air chamber wrapping body is provided at the root of the second threaded connection structure. A second sealing structure connected to the limiting stop surface is provided on the upper end surface of the secondary air chamber wrapping body.

[0009] The aforementioned atomizer nozzle assembly has a third sealing structure and a bolt hole group on the outer end face of the mounting flange.

[0010] In the aforementioned atomizer nozzle assembly, the upper part of the primary air chamber enclosure is provided with a primary airflow inlet pipe, and the upper part of the secondary air chamber enclosure is provided with a secondary airflow inlet pipe.

[0011] The beneficial effects of this utility model are:

[0012] 1. A replaceable nozzle is installed at the lower end of the nozzle body. The upper end of the circular tube section of the replaceable nozzle is connected to the aluminum liquid flow body. The circular tube section is equipped with multiple primary airflow inlets corresponding to the primary impact flow channel and multiple secondary airflow inlets corresponding to the secondary impact flow channel to ensure the atomization requirements of aluminum powder. In case of blockage, other replaceable nozzles can be used instead of replacing the nozzle body, thus saving on operating costs.

[0013] 2. The lower end of the replaceable nozzle circular pipe section is connected to the flange section, and the outer edge of the flange section is connected to the upper bending section. During assembly, the annular positioning platform at the lower end of the secondary gas chamber wrapping body is bound to the inner side of the upper bending section, and the flange section of the replaceable nozzle is connected and fixed to the bottom surface of the annular positioning platform. Therefore, the stability of the clearance fit between the replaceable nozzle circular pipe section and the aluminum liquid flow body, the primary gas chamber wrapping body and the secondary gas chamber wrapping body is ensured, the corresponding connection between the primary airflow inlet and the primary impact flow channel and the corresponding connection between the secondary airflow inlet and the secondary impact flow channel are ensured, avoiding positional deviation and ensuring operational stability. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 yes Figure 1 Enlarged view of section A.

[0016] In the diagram: 1. Installation flange, 2. Bolt hole assembly, 3. Third sealing structure, 4. Aluminum liquid flow body, 5. Annular thickened platform, 6. First threaded connection structure, 7. Primary gas chamber wrapping body, 8. First sealing structure, 9. Primary gas inlet pipe, 10. Second sealing structure, 11. Secondary gas inlet pipe, 12. Secondary threaded connection structure, 13. Secondary gas chamber wrapping body, 14. Circular pipe section, 15. Limiting stop, 16. Primary impact flow channel, 17. Primary gas inlet, 18. Secondary impact flow channel, 19. Secondary gas inlet, 20. Annular positioning platform, 21. Flange section, 22. Upper bending section. Detailed Implementation

[0017] The present invention will be described in detail with reference to the accompanying drawings.

[0018] like Figure 1 , Figure 2As shown, the atomizer nozzle assembly includes a nozzle body, which comprises an aluminum liquid flow body 4, a primary air chamber surround 7 located outside the aluminum liquid flow body 4, and a secondary air chamber surround 13 located outside the primary air chamber surround 7. A primary impact flow channel 16 is formed between the lower edge of the inner circumferential surface of the primary air chamber surround 7 and the lower edge of the outer circumferential surface of the aluminum liquid flow body 4. A secondary impact flow channel 18 is formed between the lower edge of the inner circumferential surface of the secondary air chamber surround 13 and the lower edge of the outer circumferential surface of the primary air chamber surround 7. A primary airflow inlet pipe 9 is provided on the upper part of the primary air chamber surround 7, and a secondary airflow inlet pipe 11 is provided on the upper part of the secondary air chamber surround 13.

[0019] The nozzle body has a replaceable nozzle concentrically located at its lower end. The replaceable nozzle consists of a circular tube section 14 inserted into the lower end of the nozzle body, a flange section 21 connected to the lower end of the circular tube section 14, and an upper bend section 22 connected to the outer edge of the flange section 21. The lower edge of the inner circumferential surface of the aluminum liquid flow body 4 has a limiting stop 15 corresponding to the circular tube section 14. The outer circumferential wall of the circular tube section 14 has multiple primary airflow inlets 17 corresponding to the primary impact channel 16, evenly arranged around the center line of the circular tube section 14. The outer circumferential wall of the circular tube section 14 also has multiple secondary airflow inlets 19 corresponding to the secondary impact channel 18, evenly arranged around the center line of the circular tube section 14. The lower end of the secondary air chamber enclosure 13 has an annular positioning platform 20 located inside the upper bend section 22 of the replaceable nozzle. The flange section 21 of the replaceable nozzle is connected and fixed to the bottom surface of the annular positioning platform 20.

[0020] In this embodiment, an installation flange 1 is provided at the inlet of the aluminum liquid flow body 4. An annular thickening platform 5 is provided along the outer periphery of the aluminum liquid flow body 4 at the connection with the installation flange 1. The outer periphery of the annular thickening platform 5 is provided with a first threaded connection structure 6 that connects to the primary gas chamber wrapping body 7. The upper end face of the primary gas chamber wrapping body 7 is provided with a first sealing structure 8 that connects to the installation flange 1. The outer end face of the installation flange 1 is provided with a third sealing structure 3 and a bolt hole group 2. The middle part of the outer periphery of the primary gas chamber wrapping body 7 is provided with a second threaded connection structure 12 that connects to the secondary gas chamber wrapping body 13. At the root of the second threaded connection structure 12, a limiting stop surface corresponding to the secondary gas chamber wrapping body 13 is provided. The upper end face of the secondary gas chamber wrapping body 13 is provided with a second sealing structure 10 that connects to the limiting stop surface.

[0021] Working principle:

[0022] In use, molten aluminum is injected into the molten aluminum flow body 4 of the nozzle body, while high-pressure inert gas is injected into the primary gas chamber surround body 7 and the secondary gas chamber surround body 13. The molten aluminum is sprayed out through the circular tube section 14 with replaceable nozzle. During this process, the high-pressure inert gas impacts the flowing molten aluminum through each primary gas inlet 17, forming small molten aluminum droplets. The molten aluminum droplets continue to flow, and the high-pressure inert gas impacts the flowing molten aluminum droplets a second time through each secondary gas inlet 19, making the molten aluminum droplets even smaller. Finally, they are sprayed out through the end of the circular tube section 14 with replaceable nozzle, cooled down and solidified into aluminum powder.

[0023] When the replaceable nozzle becomes clogged, disconnect it from the annular positioning platform 20 of the secondary gas chamber wrapping body 13, pull out the lower end of the nozzle body, replace it with a new replaceable nozzle, and then connect and fix it to the secondary gas chamber wrapping body 13.

[0024] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made within the scope of this utility model should still fall within the scope of this patent.

Claims

1. An atomizer nozzle assembly comprising a nozzle body, the nozzle body comprising an aluminum liquid flow body, a primary gas cavity surrounding body provided outside the aluminum liquid flow body, a secondary gas cavity surrounding body provided outside the primary gas cavity surrounding body, a primary impingement flow channel being formed between a lower edge of an inner peripheral surface of the primary gas cavity surrounding body and a lower edge of an outer peripheral surface of the aluminum liquid flow body, and a secondary impingement flow channel being formed between a lower edge of an inner peripheral surface of the secondary gas cavity surrounding body and a lower edge of an outer peripheral surface of the primary gas cavity surrounding body, characterized in that: The lower end of the nozzle body is provided with a replaceable nozzle which is concentric with the nozzle body, the replaceable nozzle is composed of a circular tube segment inserted into the lower end of the nozzle body, a flange segment connected with the lower end of the circular tube segment, and an upper bending segment connected with the outer edge of the flange segment, the inner peripheral surface of the lower end of the molten aluminum flow body is provided with a limiting stop corresponding to the circular tube segment, the outer peripheral wall of the circular tube segment is provided with a plurality of primary air flow inlets corresponding to the primary impact flow channel, each primary air flow inlet is uniformly arranged around the center line of the circular tube segment, the outer peripheral wall of the circular tube segment is provided with a plurality of secondary air flow inlets corresponding to the secondary impact flow channel, each secondary air flow inlet is uniformly arranged around the center line of the circular tube segment, the lower end of the secondary air cavity wrapping body is provided with an annular positioning table inside the upper bending segment of the replaceable nozzle, and the flange segment of the replaceable nozzle is connected and fixed with the bottom surface of the annular positioning table.

2. The atomizer nozzle assembly of claim 1, wherein: The inlet of the molten aluminum flow body is provided with a mounting flange plate, the outer peripheral surface of the molten aluminum flow body is provided with an annular thickening table at the connection with the mounting flange plate, the outer peripheral surface of the annular thickening table is provided with a first threaded connection structure connected with the primary air cavity wrapping body, and the upper end surface of the primary air cavity wrapping body is provided with a first sealing structure connected with the mounting flange plate.

3. The atomizer nozzle assembly of claim 1, wherein: The outer peripheral surface of the primary air cavity wrapping body is provided with a second threaded connection structure connected with the secondary air cavity wrapping body, and the root of the second threaded connection structure is provided with a limiting stop surface corresponding to the secondary air cavity wrapping body, and the upper end surface of the secondary air cavity wrapping body is provided with a second sealing structure connected with the limiting stop surface.

4. The atomizer nozzle assembly of claim 2, wherein: The outer end surface of the mounting flange plate is provided with a third sealing structure and a bolt hole group.

5. The atomizer nozzle assembly of claim 1, wherein: The upper part of the primary air cavity wrapping body is provided with a primary air flow inlet pipeline, and the upper part of the secondary air cavity wrapping body is provided with a secondary air flow inlet pipeline.

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