Plasma rotating electrode powder manufacturing equipment

Abstract

The utility model discloses plasma rotating electrode powder manufacturing equipment which comprises an atomizing chamber and a driving assembly, a feeding port is formed in the atomizing chamber, the driving assembly is used for driving a bar to penetrate through the feeding port in the axis direction of the bar to reach the atomizing chamber and rotate around the axis of the bar, and the plasma rotating electrode powder manufacturing equipment further comprises an elastic sealing sleeve. One end of the elastic sealing sleeve is in sealed detachable butt joint with the driving assembly, the other end of the elastic sealing sleeve is in sealed butt joint with the atomizing chamber, so that a sealed cavity is formed between the atomizing chamber and the driving assembly, and the bar is located in the sealed cavity. According to the utility model, the elastic sealing sleeve is arranged between the atomizing chamber and the driving component, and the bar is directly accommodated in the sealing cavity formed by the elastic sealing sleeve, so that the purpose of omitting a sealing rubber ring on the feeding hole is achieved, and the problems of contact abrasion between the sealing rubber ring and the bar and pollution to the bar are avoided.

Description

Technical Field

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

[0002] Plasma rotating electrode powder making equipment is an important equipment for raw material processing in the powder metallurgy industry. Its working principle is to rotate the metal bar at high speed, melt the bar through the high current arc generated by the plasma gun, and throw the molten metal in the form of small liquid droplets during the rotation process, solidifying into spherical metal powder. In order to maintain the sealing performance of the feed port, the existing plasma rotating electrode powder making equipment is equipped with a sealing rubber ring on the outside of the feed port of the atomization chamber. The sealing rubber ring will wear under the high-speed rotation of the bar, which will cause contamination of the bar and cause impurities in the prepared powder. Summary of the invention

[0003] The main purpose of the utility model is to provide a plasma rotating electrode powder making device, by arranging an elastic sealing sleeve between the atomizing chamber and the driving assembly, the rod material is directly accommodated in the sealing chamber formed by the elastic sealing sleeve, so as to achieve the purpose of omitting the sealing rubber ring on the feed port, so that there will be no contact wear between the sealing rubber ring and the rod material, thereby contaminating the rod material.

[0004] To this end, the utility model provides a plasma rotating electrode powder making device, including an atomizing chamber and a driving assembly, wherein the atomizing chamber is provided with a feed port, and the driving assembly is used to drive the rod material to pass through the feed port along its axial direction to reach the atomizing chamber and rotate around the axis of the rod material, and also includes an elastic sealing sleeve, one end of the elastic sealing sleeve is sealingly and detachably docked with the driving assembly, and the other end is sealingly docked with the atomizing chamber, so that a sealed chamber is formed between the atomizing chamber and the driving assembly, and the rod material is located in the sealed chamber.

[0005] Specifically, one end of the elastic sealing sleeve is sealed and connected to the driving assembly through a magnetic assembly. The magnetic assembly includes a first magnetic ring arranged on one end of the elastic sealing sleeve, a second magnetic ring arranged on the driving assembly and cooperating with the first magnetic ring, and a sealing ring arranged between the first magnetic ring and the second magnetic ring.

[0006] Specifically, the other end of the elastic sealing sleeve is sealed and butted with the atomization chamber through a flange assembly.

[0007] Specifically, the atomization chamber is an inert gas protection chamber or a vacuum chamber, and a dynamic sealing bearing is provided at the feed inlet of the atomization chamber, and the rod material passes through the dynamic sealing bearing.

[0008] Specifically, the feed port is also provided with an opening and closing valve. When the rod is inserted into the feed port, the opening and closing valve opens to open the feed port. When the rod is withdrawn from the feed port, the opening and closing valve closes to seal the feed port.

[0009] Specifically, the elastic sealing sleeve is an elastic bellows.

[0010] 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 rod through a coupling. The pushing cylinder is fixedly arranged on the base and is used to push the driving motor to move along the slide rail to realize rod feeding. The elastic sealing sleeve is directly sealed and docked with the housing of the driving motor.

[0011] Specifically, two groups of slide rails are arranged side by side on the base, and the cross section of each group of slide rails is T-shaped. The bottom of the base of the drive motor is provided with a T-shaped slide groove adapted to the slide rail.

[0012] Compared with the prior art, the utility model has the following beneficial effects: by arranging an elastic sealing sleeve between the atomizing chamber and the driving assembly, a sealed chamber directly connected to the atomizing chamber is formed between the atomizing chamber and the driving assembly, and the rod material is directly accommodated in the sealed chamber, and the sealing rubber ring on the feed port of the atomizing chamber can be omitted, so there will be no problem of contact wear between the sealing rubber ring and the rod material, thereby contaminating the rod material. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] 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.

[0014] Figure 1 It is a schematic structural diagram of a plasma rotating electrode powder making device provided by an embodiment of the utility model;

[0015] Figure 2 It is a side view of a plasma rotating electrode powder making device provided by an embodiment of the utility model;

[0016] Among them: 1. Atomization chamber; 2. Drive assembly; 201. Base; 202. Drive motor; 203. Coupling; 204. Slide rail; 3. Elastic sealing sleeve; 4. Rod material; 5. Dynamic sealing bearing; 6. Plasma gun; 7. Sealed chamber; 8. Magnetic suction assembly; 801. First magnetic suction ring; 802. Second magnetic suction ring; 803. Sealing ring; 9. Flange assembly; 10. Opening and closing valve. DETAILED DESCRIPTION

[0017] 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.

[0018] 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.

[0019] 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.

[0020] See also Figure 1 A plasma rotating electrode powder making device comprises an atomizing chamber 1, a driving assembly 2 and an elastic sealing sleeve 3. A feed port is provided on one side of the atomizing chamber 1. A plasma gun 6 is also provided in the atomizing chamber 1. The driving assembly 2 is used to drive a rod 4 to pass through the feed port along its axial direction to reach the atomizing chamber 1 and rotate around the axis of the rod 4. After one end of the rod 4 passes through the feed port and is inserted into the atomizing chamber 1, the plasma gun 6 is aimed at the rod 4. One end of the elastic sealing sleeve 3 is sealed and detachably connected to the driving assembly 2, and the other end is sealed and connected to the atomizing chamber 1, so that a sealed chamber 7 is formed between the atomizing chamber 1 and the driving assembly 2, and the rod 4 is located in the sealed chamber 7.

[0021] The working principle of the above-mentioned plasma rotating electrode atomization powder making equipment is: the driving component 2 drives the rod 4 to extend into the atomization chamber 1, and then drives it to rotate at high speed. The plasma arc of the plasma gun 6 acts on the end face of the rod 4, and the end face of the high-speed rotating rod 4 is melted, broken, and condensed into powder by the high-temperature plasma arc.

[0022] In this embodiment, an elastic sealing sleeve 3 is arranged between the atomizing chamber 1 and the driving assembly 2, so that a sealed chamber 7 directly connected to the atomizing chamber is formed between the atomizing chamber 1 and the driving assembly 2, and the rod 4 is directly accommodated in the sealed chamber 7. Therefore, the sealing rubber ring on the feed port of the atomizing chamber can be omitted, so there will be no contact wear between the sealing rubber ring and the rod 4, thereby contaminating the rod 4.

[0023] See also Figure 1 Specifically, one end of the elastic sealing sleeve 3 is magnetically attracted and sealed with the driving component 2 through the magnetic attraction component 8. The magnetic attraction component 8 includes a first magnetic ring 801 arranged on one end of the elastic sealing sleeve 3, a second magnetic ring 802 arranged on the driving component 2 and cooperating with the first magnetic ring 801, and a sealing ring 803 arranged between the first magnetic ring 801 and the second magnetic ring 802. The first magnetic ring 801 is magnetically attracted and connected with the second magnetic ring 802, and the sealing ring 803 is pressed tightly.

[0024] In this embodiment, the magnetic attraction component 8 is used to achieve the sealed docking between the elastic sealing sleeve 3 and the driving component 2. The elastic sealing sleeve 3 and the driving component 2 are easy to disassemble and assemble, thereby facilitating the replacement of the rod material 4.

[0025] See also Figure 1 The other end flange assembly 9 of the elastic sealing sleeve 3 is sealed and docked with the atomizing chamber 1. The flange assembly 9 includes a first flange arranged on the other end of the elastic sealing sleeve 3, a second flange arranged on the atomizing chamber 1, connecting bolts for fastening the first flange and the second flange, and a sealing ring 803 arranged between the first flange and the second flange. Of course, it should be noted that the elastic sealing sleeve 3 can also be sealed and docked with the driving assembly 2 using the flange assembly 9.

[0026] It can be understood that in actual design, the atomizing chamber 1 can be designed as an inert gas protection chamber or a vacuum chamber according to the specific characteristics of the prepared powder. For example, when the atomizing chamber 1 is an inert gas protection chamber, a gas charging device can be provided on the atomizing chamber 1. The gas charging device is connected to the atomizing chamber 1 through a charging pipe. A gas valve is provided on the charging pipe. By introducing a protective gas such as argon into the atomizing chamber 1, oxidation of the prepared powder can be prevented. A dynamic sealing bearing 5 is provided at the feed port of the atomizing chamber 1, and the rod 4 passes through the dynamic sealing bearing 5, so that the rod 4 rotates stably.

[0027] In addition, by respectively providing a circulating gas outlet and a circulating gas inlet at the upper and lower ends of the atomizing chamber 1, the circulating gas outlet and the circulating gas inlet are connected by a gas circulation pipe, and a circulating air pump is provided on the gas circulation pipe. With this design, the circulating air 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 together, and further reduce the particle size of the obtained powder.

[0028] See also Figure 1 In some embodiments, the connection between the elastic sealing sleeve 3 and the driving component 2 needs to be loosened when changing materials, that is, the airtightness of the sealing chamber 7 is destroyed, and the protective gas in the atomizing chamber 1 will leak from the feed port. To address the above problem, an opening and closing valve 10 can be set on the feed port. The opening and closing valve 10 is connected to the control system of the equipment. When the driving component 2 drives the rod 4 to insert into the feed port, the control system can control the opening and closing valve 10 to open to open the feed port, so that the rod 4 can be smoothly inserted. When the driving component 2 drives the rod 4 to withdraw from the feed port, the control system controls the opening and closing valve 10 to close and seal the feed port, so that the protective gas will not flow out from the feed port when changing materials. Of course, the atomizing chamber 1 can also be designed as a vacuum chamber. When the atomizing chamber 1 is a vacuum chamber, it is necessary to add exhaust equipment to the atomizing chamber 1.

[0029] See also Figure 1 and Figure 2 In some embodiments, the driving assembly 2 includes a base 201, a driving motor 202, a coupling 203 and a pushing cylinder. The driving motor 202 is slidably installed on the base 201 through a slide rail 204. The motor shaft of the driving motor 202 is connected to the rod 4 through the coupling 203. The pushing cylinder is fixedly set on the base 201, and is used to push the driving motor 202 to move along the slide rail 204 to realize the feeding of the rod 4. The elastic sealing sleeve 3 is directly sealed and docked with the driving motor 202, that is, the second magnetic ring 802 is directly set on the housing of the driving motor 202 and is located outside the motor shaft. The elastic sealing sleeve 3 can adopt an elastic bellows.

[0030] In this embodiment, the motor shaft of the driving motor 202 is connected to the bar 4 through the coupling 203, and then the power is transmitted to the bar 4, driving the bar 4 to rotate at a high speed, and the pushing cylinder drives the driving motor 202 to slide horizontally along the slide rail 204 to realize the feeding of the bar 4. During the feeding movement, the elastic sealing sleeve 3 can use its own elasticity to perform telescopic movement synchronously with the bar 4. Among them, the bar 4 and the coupling 203 can be directly connected by threads.

[0031] See also Figure 1 To ensure smooth feeding and smooth rotation of the bar 4, two groups of slide rails 204 are arranged side by side on the base 201. The cross-section of each group of slide rails 204 is T-shaped, and a T-shaped slide groove adapted to the slide rail 204 is provided at the bottom of the base of the drive motor 202.

[0032] 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.

[0033] 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).

[0034] 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.

[0035] 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 powder making device, comprising an atomizing chamber (1) and a driving assembly (2), wherein the atomizing chamber (1) is provided with a feed port, and the driving assembly (2) is used to drive a rod (4) along its axial direction through the feed port to reach the atomizing chamber (1) and to rotate around the axis of the rod (4), characterized in that: It also comprises an elastic sealing sleeve (3), one end of which is sealed and detachably connected to the driving assembly (2), and the other end of which is sealed and connected to the atomizing chamber (1), so that a sealed chamber (7) is formed between the atomizing chamber (1) and the driving assembly (2), and the rod (4) is located in the sealed chamber (7).

2. The plasma rotating electrode powder making equipment according to claim 1, characterized in that: One end of the elastic sealing sleeve (3) is sealed and docked with the driving assembly (2) through a magnetic attraction component (8), and the magnetic attraction component (8) comprises a first magnetic attraction ring (801) arranged on one end of the elastic sealing sleeve (3), a second magnetic attraction ring (802) arranged on the driving assembly (2) and cooperating with the first magnetic attraction ring (801), and a sealing ring (803) arranged between the first magnetic attraction ring (801) and the second magnetic attraction ring (802).

3. The plasma rotating electrode powder making equipment according to claim 1, characterized in that: The other end of the elastic sealing sleeve (3) is sealed and butted with the atomization chamber (1) via a flange assembly (9).

4. The plasma rotating electrode powder making equipment according to claim 1, characterized in that: The atomization chamber (1) is an inert gas protection chamber or a vacuum chamber. A dynamic sealing bearing (5) is provided at the feed inlet of the atomization chamber (1), and the rod material (4) passes through the dynamic sealing bearing (5).

5. The plasma rotating electrode powder making equipment according to claim 4, characterized in that: The feed inlet is also provided with an opening and closing valve (10).

6. The plasma rotating electrode powder making equipment according to claim 1, characterized in that: The elastic sealing sleeve (3) is an elastic bellows.

7. The plasma rotating electrode powder making equipment according to any one of claims 1 to 6, characterized in that: The driving assembly (2) comprises a base (201), a driving motor (202), a coupling (203) and a pushing cylinder. The driving motor (202) is slidably mounted on the base (201) via a slide rail (204). The motor shaft of the driving motor (202) is connected to the bar (4) via the coupling (203). The pushing cylinder is fixedly arranged on the base (201) and is used to push the driving motor (202) to move along the slide rail (204) to realize the feeding of the bar (4). The elastic sealing sleeve (3) is directly sealed and docked with the housing of the driving motor (202).

8. The plasma rotating electrode powder making equipment according to claim 7, characterized in that: Two groups of the slide rails (204) are arranged side by side on the base (201); the cross section of each group of the slide rails (204) is T-shaped; and the bottom of the base of the drive motor (202) is provided with a T-shaped slide groove adapted to the slide rails (204).

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