Plasma rotating electrode atomization powdering equipment

Abstract

The utility model discloses plasma rotating electrode atomization powder manufacturing equipment which aims at effectively improving the cooling effect of the side wall of an atomization chamber. Therefore, the plasma rotating electrode atomization powder manufacturing equipment comprises an atomization chamber, the end portion and the side portion of the atomization chamber are each provided with a cooling cavity, a plurality of pressure spray heads are evenly arranged in each cooling cavity, the spraying directions of the pressure spray heads face the inner wall faces of the inner sides of the cooling cavities, and the pressure spray heads are arranged on the inner wall faces of the inner sides of the cooling cavities. The multiple pressure nozzles are communicated with a water supply pipe, and a water outlet is formed in the bottom of each cooling cavity.

Description

Technical Field

[0001] The utility model belongs to the technical field of powder making, and in particular relates to plasma rotating electrode atomization powder making equipment. Background Art

[0002] Plasma rotating electrode atomizing powder making equipment is an important equipment for raw material processing in the powder metallurgy industry. Its working principle is to rotate the metal rod at high speed, melt the rod through the high current arc generated by the plasma gun, and throw the molten metal out in the form of small liquid droplets during the rotation process and solidify into metal powder.

[0003] In order to effectively prevent powder particles from sticking to the wall, a cooling chamber is usually provided in the wall of the atomization chamber, and heat is dissipated by filling the water-cooling chamber with circulating cooling water. However, the cooling effect of the side wall of the atomization chamber is not good under the conventional bottom-in and top-out circulating water inlet method, especially in the upper and middle part of the atomization chamber, where the cooling effect of the cooling chamber is poor. Summary of the invention

[0004] The main purpose of the utility model is to provide a plasma rotating electrode atomization powder making device, aiming to effectively improve the cooling effect of the side wall of the atomization chamber.

[0005] To this end, the plasma rotating electrode atomization powder making equipment provided by the utility model includes an atomization chamber, and cooling chambers are provided at the ends and sides of the atomization chamber. Multiple pressure nozzles are evenly arranged in each cooling chamber, and the spraying direction of the pressure nozzles is arranged toward the inner wall surface of the cooling chamber. The multiple pressure nozzles are connected to a water supply pipe, and a water outlet is provided at the bottom of each cooling chamber.

[0006] Specifically, the water outlet is connected to the water tank through a water outlet pipe, the water inlet of the water supply pipe is connected to the water tank, and a spray pump is provided on the water supply pipe.

[0007] Specifically, the water supply pipe in the cooling chamber at the end is a planar spiral water pipe, and the water supply pipe in the cooling chamber at the side is arranged around the side wall of the atomization chamber. Each water supply pipe is located on the inner wall side of the cooling chamber and is provided with a plurality of pressure nozzles.

[0008] Specifically, a feed port is provided on one side of the atomization chamber, and one end of the electrode rod is inserted into the atomization chamber through the feed port. A plasma gun facing the electrode rod is also provided in the atomization chamber. The other end of the electrode rod is connected to a driving assembly, and the driving assembly is used to drive the electrode rod to rotate at high speed.

[0009] Specifically, the driving assembly includes a base, a driving motor, a coupling and a pushing cylinder. The driving motor is slidably mounted on the base via a slide rail. The motor shaft of the driving motor is connected to the electrode rod material via a coupling. The pushing cylinder is fixedly arranged on the base to push the driving motor to move along the slide rail to realize the feeding of the electrode rod material.

[0010] Specifically, two groups of the slide rails are arranged side by side on the base, the cross section of each group of the slide rails is T-shaped, and the bottom of the base of the drive motor is provided with a T-shaped slide groove adapted to the slide rails.

[0011] Specifically, the atomization chamber is an inert gas protection chamber or a vacuum chamber.

[0012] Specifically, a dynamic sealing bearing is provided at the feed inlet of the atomization chamber, and the electrode rod material passes through the dynamic sealing bearing.

[0013] Compared with the prior art, the utility model has the following beneficial effects: by arranging multiple pressure nozzles in the cooling chamber, multiple pressure nozzles covering the inner wall of the atomizing chamber are directly used to perform multi-point spray cooling, so that the heat on the inner wall of the atomizing chamber is taken away in time. Compared with filling the cooling chamber with circulating cooling water for heat dissipation, not only the cooling and heat exchange effect is better, but also the cooling is more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 It is a side view of the flour making equipment provided by the embodiment of the utility model;

[0016] Figure 2 yes Figure 1 Section view in the AA direction;

[0017] Figure 3 It is an axonometric schematic diagram of a milling device provided by an embodiment of the utility model;

[0018] Among them: 1. atomization chamber; 2. cooling chamber; 3. pressure nozzle; 4. water supply pipe; 5. water outlet; 6. electrode rod material; 7. plasma gun; 8. drive assembly; 801. base; 802. drive motor; 803. coupling; 804. slide rail; 9. dynamic seal bearing; 10. water inlet. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0022] See also Figure 1-Figure 3 A plasma rotating electrode atomizing powder making device comprises an atomizing chamber 1, wherein cooling chambers 2 are arranged at the end and the side of the atomizing chamber 1, and a plurality of pressure nozzles 3 are evenly arranged in each cooling chamber 2, wherein the spraying direction of the pressure nozzles 3 is arranged toward the inner wall surface of the cooling chamber 2, the plurality of pressure nozzles 3 are connected with a water supply pipe 4, and a water outlet 5 is arranged at the bottom of each cooling chamber 2.

[0023] When the atomizing chamber 1 needs to be cooled, pressurized cooling water is supplied to the pressure nozzle 3 through the water supply pipe 4, and then the pressurized cooling water is sprayed at high speed onto the inner wall surface of the cooling chamber 2 through the pressure nozzle 3, thereby realizing spray cooling of the atomizing chamber 1, and the cooling water after heat exchange is discharged from the cooling chamber 2 in time through the water outlet 5 at the bottom.

[0024] In this embodiment, by arranging multiple pressure nozzles 3 in the cooling chamber 2, multiple pressure nozzles 3 covering the inner wall of the atomizing chamber 1 are directly used to perform multi-point spray cooling, so that the heat on the inner wall of the atomizing chamber 1 is taken away in time. Compared with the prior art in which circulating cooling water is filled into the cooling chamber 2 for heat dissipation, not only the cooling and heat exchange effect is better, but also the cooling is more uniform.

[0025] It can be understood that in actual design, in order to save water, the water outlet 5 is connected to the water tank (not shown in the figure) through the water outlet pipe, the water inlet 10 of the water supply pipe 4 is connected to the water tank, and a spray pump is also provided on the water supply pipe 4. The cooling water in the water tank is transported to the pressure nozzle 3 through the water supply pipe 4 under the pump pressure of the spray pump, and the cooling water after heat exchange can be returned to the water tank through the water outlet pipe for reuse.

[0026] See also Figure 2 In some embodiments, the water supply pipe 4 in the cooling chamber 2 at the end is a planar spiral water pipe, and the water supply pipe 4 in the cooling chamber 2 at the side is arranged around the side wall of the atomization chamber 1, and each water supply pipe 4 is located on one side of the inner wall surface of the cooling chamber 2 and is provided with a plurality of pressure nozzles 3. Such a design enables the entire cooling water path structure to achieve a more compact design while ensuring the cooling effect; wherein, in actual design, the spraying direction of the pressure nozzle 3 can be designed to be perpendicular to the inner wall surface of the cooling chamber 2, and of course, it can also be designed to have a certain inclination angle.

[0027] See also Figure 2 In some embodiments, a feed port is provided on one side of the atomization chamber 1, and one end of the electrode rod 6 is inserted into the atomization chamber 1 through the feed port. A plasma gun 7 facing the electrode rod 6 is also provided in the atomization chamber 1. The other end of the electrode rod 6 is connected to a driving assembly 8, and the driving assembly 8 is used to drive the electrode rod 6 to rotate at a high speed.

[0028] The working principle of the above-mentioned plasma rotating electrode atomization powder making equipment is: the driving component 8 drives the electrode rod 6 to extend into the atomization chamber 1, and then drives it to rotate at high speed. The plasma arc of the plasma gun 7 acts on the end face of the electrode rod 6, and the high-speed rotating rod end face is melted, broken, and condensed into powder by the high-temperature plasma arc.

[0029] See also Figure 2 and Figure 3 In some embodiments, the driving assembly 8 includes a base 801, a driving motor 802, a coupling 803 and a pushing cylinder (not shown in the figure), the driving motor 802 is slidably installed on the base 801 through a slide rail 804, the motor shaft of the driving motor 802 is connected to the electrode rod material 6 through the coupling 803, and the pushing cylinder is fixedly set on the base 801, and is used to push the driving motor 802 to move along the slide rail 804 to realize the feeding of the electrode rod material 6.

[0030] In this embodiment, the motor shaft of the driving motor 802 is connected to the electrode bar 6 through the coupling 803, and then the power is transmitted to the electrode bar 6, driving the electrode bar 6 to rotate at a high speed, and the pushing cylinder drives the driving motor 802 to slide horizontally along the slide rail 804 to realize the feeding of the electrode bar 6. Among them, the electrode bar 6 and the coupling 803 can be directly connected by threads.

[0031] To ensure smooth feeding and smooth rotation of the electrode rod material 6, two groups of slide rails 804 are arranged side by side on the base 801. The cross-section of each group of slide rails 804 is T-shaped, and the bottom of the base of the driving motor 802 is provided with a T-shaped slide groove adapted to the slide rail 804.

[0032] Among them, in practical applications, the atomizing chamber 1 can be designed as an inert gas protection chamber or a vacuum chamber according to the specific characteristics of the powder to be prepared. For example, when the atomizing chamber 1 is an inert gas protection chamber, a gas filling device can be provided on the atomizing chamber 1, and the gas filling device is connected to the atomizing chamber 1 through a gas filling pipe, and a gas valve is provided on the gas filling pipe. By introducing a protective gas such as argon into the atomizing chamber 1, oxidation of the prepared powder can be prevented. In addition, by providing a circulating gas outlet and a circulating gas inlet at the upper and lower ends of the atomizing chamber, respectively, the circulating gas outlet and the circulating gas inlet are connected through a gas circulation pipe, and a circulating gas pump is provided on the gas circulation pipe. In this design, the circulating gas pump can be used to drive the protective gas in the atomizing chamber 1 to circulate, which can improve the cooling effect of the droplets, prevent the powder from sticking, and further reduce the particle size of the prepared powder.

[0033] In order to effectively prevent the leakage of inert gas, a dynamic seal bearing 9 is provided at the feed port of the atomizing chamber 1, and the electrode rod material 6 extends through the dynamic seal bearing 9 into the atomizing chamber 1. Of course, when the atomizing chamber 1 is a vacuum chamber, an exhaust device can be added to the atomizing chamber 1.

[0034] Unless otherwise stated, any technical solution disclosed in the above utility model, if it discloses a numerical range, then the disclosed numerical range is a preferred numerical range, and any technician in the field should understand that the preferred numerical range is only a numerical value with a more obvious technical effect or representative value among many implementable numerical values. Since there are too many numerical values ​​to be exhaustive, the utility model discloses only some numerical values ​​to illustrate the technical solution of the present invention, and the numerical values ​​listed above should not constitute a limitation on the scope of protection of the invention.

[0035] At the same time, if the above-mentioned utility model discloses or involves components or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connected by bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by one-piece molding using a casting process) (except when it is obviously impossible to use an one-piece molding process).

[0036] In addition, the terms used in any technical solution disclosed in the above utility model to indicate positional relationship or shape include the state or shape that is similar, similar or close to it unless otherwise stated. Any component provided by the utility model can be assembled from multiple separate components, or it can be a separate component manufactured by an integrated molding process.

[0037] The above embodiments are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. The obvious changes or modifications derived from these are still within the scope of protection of the present invention.

Claims

1. A plasma rotating electrode atomization powder making device, comprising an atomization chamber (1), wherein the end and the side of the atomization chamber (1) are provided with cooling chambers (2), characterized in that: A plurality of pressure nozzles (3) are evenly arranged in each cooling chamber (2), and the spraying direction of the pressure nozzles (3) is arranged toward the inner wall surface of the cooling chamber (2). The plurality of pressure nozzles (3) are connected to a water supply pipe (4), and a water outlet (5) is arranged at the bottom of each cooling chamber (2).

2. The plasma rotating electrode atomization powder making equipment according to claim 1, characterized in that: The water outlet (5) is connected to the water storage tank via a water outlet pipe, the water inlet (10) of the water supply pipe (4) is connected to the water storage tank, and a spray pump is provided on the water supply pipe (4).

3. The plasma rotating electrode atomization powder making equipment according to claim 1, characterized in that: The water supply pipe (4) in the cooling chamber (2) at the end is a planar spiral water pipe, and the water supply pipe (4) in the cooling chamber (2) at the side is arranged around the side wall of the atomization chamber (1), and each of the water supply pipes (4) is provided with a plurality of pressure nozzles (3) on the inner wall surface of the cooling chamber (2).

4. The plasma rotating electrode atomization powder making equipment according to any one of claims 1 to 3, characterized in that: A feed port is provided on one side of the atomizing chamber (1), and one end of the electrode rod (6) is inserted into the atomizing chamber (1) through the feed port. A plasma gun (7) facing the electrode rod (6) is also provided in the atomizing chamber (1). The other end of the electrode rod (6) is connected to a driving component (8), and the driving component (8) is used to drive the electrode rod (6) to rotate at a high speed.

5. The plasma rotating electrode atomization powder making equipment according to claim 4, characterized in that: The driving assembly (8) comprises a base (801), a driving motor (802), a coupling (803) and a pushing cylinder. The driving motor (802) is slidably mounted on the base (801) via a slide rail (804). The motor shaft of the driving motor (802) is connected to the electrode bar (6) via a coupling (803). The pushing cylinder is fixedly arranged on the base (801) and is used to push the driving motor (802) to move along the slide rail (804) to realize feeding of the electrode bar (6).

6. The plasma rotating electrode atomization powder making equipment according to claim 5, characterized in that: Two groups of the slide rails (804) are arranged side by side on the base (801), and the cross section of each group of the slide rails (804) is T-shaped. The bottom of the base of the drive motor (802) is provided with a T-shaped slide groove adapted to the slide rails (804).

7. The plasma rotating electrode atomization powder making equipment according to claim 4, characterized in that: The atomization chamber (1) is an inert gas protection chamber or a vacuum chamber.

8. The plasma rotating electrode atomization powder making equipment according to claim 7, characterized in that: A dynamic sealing bearing (9) is provided at the feed inlet of the atomizing chamber (1), and the electrode rod material (6) passes through the dynamic sealing bearing (9).

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