A double-layer ring hole atomizing spray disc

Abstract

The invention discloses a double-layer annular hole atomizing spray disc, which is applied to an aerosol machine, wherein the aerosol machine has a high-pressure medium inlet component, a medium guide pipe and a medium bag body, wherein the double-layer annular hole atomizing spray disc comprises a melt guide hole penetrating the medium bag body; a first conical slope surrounding the bottom of the melt guide hole, wherein the first conical slope has a first single-layer annular distribution pinhole connected to the medium guide pipe; a second conical slope surrounding the first conical slope, wherein the second conical slope has a second single-layer annular distribution pinhole connected to the medium guide pipe; an isolation lip surrounding the first conical slope, forming an atomization area with the first conical slope, separating the first conical slope from the second conical slope; and a third conical slope located at the bottom of the medium bag body, surrounding the second conical slope. The double-layer annular hole spray disc can be used to prepare particles with fine particle size and uniform particle size distribution for a long time.

Description

Technical Field

[0001] The invention belongs to the technical field of metal preparation equipment, and in particular relates to a double-layer annular hole type atomizing spray disc. Background Art

[0002] Powder metallurgy is a process technology that produces metal powder or uses metal powder (or a mixture of metal powder and non-metal powder) as raw material, and then forms and sinters it to manufacture metal materials, composite materials and various types of products. Powder metallurgy is similar to the production of ceramics, both of which belong to powder sintering technology.

[0003] Traditional powder metallurgy does not have strict requirements on powder size, particle size distribution, powder morphology and stability. However, with the development of metal injection molding, thermal spraying, metal rapid prototyping, surface mounting and other technologies in the past decade, the geometric characteristics of metal powders have become as important as material properties in ensuring the accuracy and stability of high-quality products.

[0004] At present, most industrial gas atomization powder making equipment uses annular gap atomizers to prepare amorphous powders. However, due to the large outlet area of ​​the annular gap atomizer medium, the atomization pressure of the high-pressure medium is insufficient, the impact and dispersion forces on the powder are weak, and the cooling rate of the melt droplets is insufficient, resulting in large particle size, poor sphericity, and insufficient amorphousness of the prepared powder. It is also very easy for the prepared powder to form a large number of flaky structures, which is not conducive to the finalization of the powder preparation process and stable industrial production.

[0005] Utility model CN205436172U discloses an annular gap atomizer for preparing amorphous powders. The method of slowly dripping liquid nitrogen into the atomization area is used to accelerate the cooling rate of the powder during the atomization process, thereby greatly improving the amorphous yield of the powder and improving the sphericity of the powder. However, the annular gap atomizer disclosed in the utility model has a large gas outlet and a large gas consumption, and has a poor dispersion effect on the melt. It requires a large amount of high-pressure medium and the prepared powder particle size is also large. At the same time, during the annular gap spray plate gas atomization process, a negative pressure will be formed in the atomization area, forming a strong suction force. Excessive suction force will cause the metal liquid to flow and fall too fast, which will lead to a decrease in the fine powder yield.

[0006] Invention CN107414092A discloses an atomizing powder spraying disc. The atomizing powder spraying disc of the present invention adopts an adjustable connection mode for the spray assembly, which can improve the installation accuracy of the spray assembly, and can easily readjust the offset spray assembly to a precise position after long-term use, ensuring the uniform stability of the spray, so that the atomizing medium can effectively impact the high-temperature melt to break it into fine droplets, and ensure that the atomized powder has a uniform particle size. However, its structure is relatively complex and difficult to operate. The specific angles between the nozzles are jointly determined by the angle of the water outlet threaded hole and the processing accuracy, the nozzle processing accuracy and the assembly position; due to rust, wear and tear, etc., even if the processing accuracy is high, the specific angle between the nozzles cannot be guaranteed after long-term use, and the atomizing powder making effect is difficult to be guaranteed, and it is difficult to ensure that the atomized powder with uniform particle size is obtained. Summary of the invention

[0007] The invention provides a double-layer annular hole type atomizing spray disc, by which particles with fine particle size and uniform particle size distribution can be prepared for a long time.

[0008] A double-layer ring hole atomizing spray disc is applied to an aerosol machine, wherein the aerosol machine has a high-pressure medium inlet component, a medium guide pipe and a medium bag body, and the double-layer ring hole atomizing spray disc comprises:

[0009] A melt guide hole, wherein the melt guide hole penetrates the medium pack body;

[0010] A first conical slope, the first conical slope surrounds the bottom of the melt guide hole, the first conical slope has a first single-layer annular distribution pinhole, the first single-layer annular distribution pinhole is connected to the medium guide pipe, and is used to discharge high-pressure medium to break up the melt to form melt particles, while preventing the melt from hitting the isolation lip;

[0011] a second conical slope, the second conical slope surrounds the first conical slope, the second conical slope has a second single-layer annular distribution pinhole, the second single-layer annular distribution pinhole is connected to the medium guide pipe, and is used to reduce the temperature of the isolation lip and the melt particles through the discharged high-pressure medium;

[0012] An isolation lip, the isolation lip surrounds the first conical inclined surface, forms an atomization area with the first conical inclined surface, and separates the first conical inclined surface from the second conical inclined surface;

[0013] and a third conical slope, which is located at the bottom of the media pack body and surrounds the second conical slope. A negative pressure area is constructed by the third conical slope, and the melt enters the atomization area under the suction force of the negative pressure area.

[0014] The high-pressure medium is one or more of high-pressure nitrogen, high-pressure argon, high-pressure liquid nitrogen, compressed air, and high-pressure water.

[0015] The material of the double-layer annular hole type atomizing spray disc is high temperature resistant alloy or stainless steel.

[0016] The melt guide hole, the first conical slope, the second conical slope, the isolation lip and the third conical slope are uniformly distributed in concentric circular shapes.

[0017] The melt guide hole, the first tapered slope, the second tapered slope, the isolation lip and the third tapered slope all take the center of the medium package body as the center of the circle.

[0018] The first single-layer annular distribution pinholes are annularly distributed on the first conical slope with the center of the melt guide hole as the center of the circle, and vertically penetrate the first conical slope.

[0019] The diameter of the pinholes in the first single-layer annular distribution of pinholes is 0.1-2 mm.

[0020] The second single-layer annular distribution pinholes are annularly distributed on the second conical slope with the center of the melt guide hole as the center of the circle, and vertically penetrate the second conical slope.

[0021] The diameter of the pinholes in the second single-layer annular distribution of pinholes is 0.1-2 mm.

[0022] The isolation lip is cylindrical and arranged at the periphery of the first conical slope, and is used to isolate the high-pressure medium flow sprayed from the first single-layer annular distribution pinhole and the second single-layer annular distribution pinhole, so as to avoid the high-pressure medium flow from affecting each other and enable the atomized melt particles to be sprayed in a certain direction.

[0023] The first conical inclined surface, the second conical inclined surface and the third conical inclined surface form an angle of 15-60 degrees with the vertical direction.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention utilizes the high-pressure medium sprayed from the first single-layer annularly distributed pinholes to break most of the melt into relatively fine melt particles, and utilizes the high-pressure medium sprayed from the second single-layer annularly distributed pinholes to break the remaining melt into fine melt particles, and at the same time cools the obtained fine melt particles, and avoids interference between the high-pressure media sprayed from the first and second single-layer annularly distributed pinholes through the isolation lip, thereby obtaining uniform fine particles; the present invention also utilizes the high-pressure medium sprayed from the first single-layer annularly distributed pinholes to prevent the isolation lip located at the periphery from being impacted by the high-temperature melt, and at the same time utilizes the high-pressure medium sprayed from the second single-layer annularly distributed pinholes to cool the isolation lip, and the above two points extend the service life of the isolation lip, so that the double-layer annular hole atomizing spray disc can prepare uniform, fine-particle particles for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of an aerosol machine provided by an embodiment of the present invention;

[0027] Figure 2 A schematic diagram of a double-layer annular hole atomizing spray disc provided in an embodiment of the present invention;

[0028] Figure 3 An interface diagram of a double-layer annular hole atomizing spray disc provided in an embodiment of the present invention;

[0029] Figure 4 A partial enlarged view of the interface of a double-layer annular hole atomizing spray disc provided in an embodiment of the present invention;

[0030] Among them, 1-high-pressure medium inlet component, 2-medium diversion pipeline, 3-medium package body, 4-double-layer annular hole atomizing spray disc, 41-melt diversion hole, 42-first conical slope, 421-first single-layer annular distribution pinhole, 43-second conical slope, 431-second single-layer annular distribution pinhole, 44-isolation lip, 45-third conical slope. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with the embodiments and drawings. It should be pointed out that the embodiments described below are intended to facilitate the understanding of the present invention and do not have any limiting effect on the present invention.

[0032] The present invention provides a double-layer annular hole atomizing spray disc 4 that can break up a high-temperature melt into melt particles with uniform particle size. The high-pressure medium sprayed from the first single-layer annular distribution pinhole 421 is used to break up most of the high-temperature melt sprayed from the melt guide hole 41 to form fine melt particles. The high-pressure medium sprayed from the second single-layer annular distribution pinhole 431 is then used to break up the remaining high-temperature melt. At the same time, the fine melt particles formed above are cooled, thereby completing the granulation of the high-temperature melt, and the fine powder yield obtained is relatively high.

[0033] The present invention also separates the first single-layer annular distribution pinhole 421 and the second single-layer annular distribution pinhole 431 by setting an isolation lip 44, so as to avoid mutual interference between the high-pressure media sprayed from the first single-layer annular distribution pinhole 421 and the second single-layer annular distribution pinhole 431, so as to achieve the purpose of obtaining particles with uniform particle size; the isolation lip 44 is set between the first conical slope 42 and the second conical slope 43, and the high-pressure medium sprayed from the first single-layer annular distribution pinhole 421 passing through the first conical slope 42 is prevented from directly colliding with the isolation lip 44, and at the same time, the second conical slope 43 is set outside the isolation lip 44, and the high-pressure medium sprayed from the second single-layer annular distribution pinhole 431 passing through the second conical slope 43 can also cool the isolation lip 44. Based on the above two points, the isolation lip has a longer service life, so that the double-layer ring hole atomizing spray disc 4 can still atomize to obtain particles with uniform particle size and fine particles during long-term use.

[0034] The present invention provides an aerosol machine, such as Figure 1 As shown, it includes a high-pressure medium inlet component 1, a medium guide pipe 2, a medium package body 3 and a double-layer annular hole atomizing spray disc 4. The high-pressure medium enters the medium guide pipe 2 through the high-pressure medium inlet component 1, passes through the medium guide pipe 2 through the medium package body 3 and enters the double-layer annular hole atomizing spray disc 4, and is discharged through the double-layer annular hole atomizing spray disc 4, and acts on the high-temperature melt to break the high-temperature melt into fine and uniform melt particles. The high-pressure medium is one or more of high-pressure nitrogen, high-pressure argon, high-pressure liquid nitrogen, compressed air, high-pressure water and other media. The material of the double-layer annular hole atomizing spray disc is a high-temperature resistant alloy or stainless steel.

[0035] The present invention provides a double-layer annular hole type atomizing spray disc 4, such as Figure 2 , Figure 3 , Figure 4 As shown, including:

[0036] The melt guide hole 41, the first tapered slope 42, the first single-layer annular distribution pinhole 421, the second tapered slope 43, the second single-layer annular distribution pinhole 431, the isolation lip 44, and the third tapered slope 45. The melt guide hole 41, the first tapered slope 42, the second tapered slope 43, the isolation lip 44, and the third tapered slope 45 are all centered on the center of the medium pack body 3.

[0037] The melt guide hole 41 provided by the present invention is located in the middle of the medium pack body 3 and penetrates the medium pack body 3 .

[0038] The first conical slope 42 provided by the present invention surrounds the bottom of the melt guide hole 41 and forms an angle of 30° with the vertical direction. The first conical slope 42 has a first single-layer annular distribution pinhole 421. The first single-layer annular distribution pinhole 421 is distributed in a ring shape on the first conical slope 42 with the center of the melt guide hole 41 as the center of the circle, and the first single-layer annular distribution pinhole 421 vertically penetrates the first conical slope 42. The pinhole diameter of the first single-layer annular distribution pinhole 421 is 1 mm. The first single-layer annular distribution pinhole 421 is connected to the medium guide pipe 2, so that the high-pressure medium is ejected from the first single-layer annular distribution pinhole 421. The ejected high-pressure medium can break the high-temperature melt and prevent the high-temperature melt from directly colliding with the isolation lip 44.

[0039] The second conical slope 43 provided by the present invention surrounds the first conical slope 42, and the second conical slope 43 forms an angle of 30° with the vertical direction. The second conical slope 43 has a second single-layer annular distribution pinhole 431, and the pinhole diameter of the second single-layer annular distribution pinhole 431 is 1 mm. The second single-layer annular distribution pinhole 431 is connected to the medium diversion pipe 2, so that the high-pressure medium is ejected from the second single-layer annular distribution pinhole 431. The ejected high-pressure medium can cool the isolation lip 44, and can also break up the remaining high-temperature melt to obtain fine melt particles, and cool the fine melt particles obtained under the action of the first single-layer annular distribution pinhole 421 and the second single-layer annular distribution pinhole 431.

[0040] The isolation lip 44 provided by the present invention is a cylinder, which is arranged at the periphery of the first conical slope 42 to surround the first conical slope 42, and form an atomization area with the first conical slope 42, and separate the first conical slope 42 from the second conical slope 43, and is used to isolate the high-pressure medium flow sprayed from the first single-layer annular distribution pinhole 421 and the second single-layer annular distribution pinhole 431. It avoids the mutual influence of the high-pressure medium flow to obtain particles with uniform particle size, and can also make the atomized particles sprayed in a certain direction, avoiding the atomized particles from being sprayed to an unspecified area.

[0041] The third conical slope 45 provided by the present invention is located at the bottom of the medium package body 3 and at the periphery of the second conical slope 43, so as to surround the second conical slope 43 and construct a negative pressure area through the three-dimensional area surrounded by the second conical slope 43. When the high-pressure medium flow is ejected from the first single-layer annular distribution pinhole 421 and the second single-layer annular distribution pinhole 431, the high-temperature melt is attracted to the atomization area through the melt guide hole 41 under the action of the suction force of the negative pressure area.

[0042] One or more airflows of media such as high-pressure nitrogen, high-pressure argon, high-pressure liquid nitrogen, compressed air, and high-pressure water ejected from the first single-layer annular distribution pinholes 421 and the second single-layer annular distribution pinholes 431 further act to effectively impact the high-temperature melt to break it into fine melt droplets and cool the melt droplets. The ejected fine melt droplets are further condensed and condensed into spherical particles during flight, thereby obtaining an alloy powder with uniform particle size, high sphericity, and completely amorphous state.

[0043] The above are only preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be regarded as limiting the present invention, and the protection scope of the present invention should be based on the scope defined by the claims. For ordinary technicians in this technical field, several improvements can be made without departing from the spirit and scope of the present invention, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. A double-layer annular hole atomizing spray disc, applied to an aerosol machine, the aerosol machine having a high-pressure medium inlet component, a medium guide pipe and a medium bag body, characterized in that: The double-layer annular hole type atomizing spray disc comprises: A melt guide hole, wherein the melt guide hole penetrates the medium pack body; A first conical slope, the first conical slope surrounds the bottom of the melt guide hole, the first conical slope has a first single-layer annular distribution pinhole, the first single-layer annular distribution pinhole is connected to the medium guide pipe, and is used to discharge high-pressure medium to break up the melt to form melt particles, while preventing the melt from hitting the isolation lip; a second conical slope, the second conical slope surrounds the first conical slope, the second conical slope has a second single-layer annular distribution pinhole, the second single-layer annular distribution pinhole is connected to the medium guide pipe, and is used to reduce the temperature of the isolation lip and the melt particles through the discharged high-pressure medium; An isolation lip, the isolation lip surrounds the first conical inclined surface, forms an atomization area with the first conical inclined surface, and separates the first conical inclined surface from the second conical inclined surface; and a third conical slope, wherein the third conical slope is located at the bottom of the media pack body and surrounds the second conical slope. A negative pressure area is constructed by the third conical slope, and the melt enters the atomization area under the suction force of the negative pressure area; The isolation lip is in the shape of a cylinder and is disposed at the periphery of the first conical slope to isolate the high-pressure medium flow ejected from the first single-layer annular distribution pinhole and the second single-layer annular distribution pinhole.

2. The double-layer annular hole atomizing spray disc according to claim 1, characterized in that: The high-pressure medium is one or more of high-pressure nitrogen, high-pressure argon, high-pressure liquid nitrogen, compressed air, and high-pressure water.

3. The double-layer annular hole atomizing spray disc according to claim 1, characterized in that: The material of the double-layer annular hole type atomizing spray disc is high temperature resistant alloy or stainless steel.

4. The double-layer annular hole atomizing spray disc according to claim 1, characterized in that: The melt guide hole, the first conical slope, the second conical slope, the isolation lip and the third conical slope are uniformly distributed in concentric circular shapes.

5. The double-layer annular hole atomizing spray disc according to claim 4, characterized in that: The melt guide hole, the first tapered slope, the second tapered slope, the isolation lip and the third tapered slope all take the center of the medium pack body as the center of the circle.

6. The double-layer annular hole atomizing spray disc according to claim 1, characterized in that: The first single-layer annular distribution pinholes are annularly distributed on the first conical slope with the center of the melt guide hole as the center of the circle, and vertically penetrate the first conical slope.

7. The double-layer annular hole atomizing spray disc according to claim 1, characterized in that: The diameter of the pinholes in the first single-layer annular distribution of pinholes is 0.1-2 mm.

8. The double-layer annular hole atomizing spray disc according to claim 1, characterized in that: The second single-layer annular distribution pinholes are annularly distributed on the second conical slope with the center of the melt guide hole as the center of the circle, and vertically penetrate the second conical slope.

9. The double-layer annular hole atomizing spray disc according to claim 1, characterized in that: The diameter of the pinholes in the second single-layer annular distribution of pinholes is 0.1-2 mm.

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