Vacuum powder feeding module of radio frequency plasma spheroidizing device

Abstract

The utility model discloses a vacuum powder feeding module of a radio frequency plasma spheroidizing device, which relates to the technical field of powder spheroidizing, and is characterized in that a material suction bin, a first cavity and a second cavity are sequentially communicated, the material suction bin is positioned below the first cavity and the second cavity, and an air suction pipe is arranged at the middle upper parts of the first cavity and the second cavity; and the height difference between the air suction pipe and the material suction bin is as large as possible, so that a smaller amount of metal powder can move upwards to reach the position near the air suction pipe, and the problem that chippings are generated by air filter cotton is further solved. The air filter cotton is sleeved on the partial surface of the air suction pipe located in the second cavity, so that the metal powder can only contact with the end face of the inner cavity of the air filter cotton, while the metal powder can contact with the whole outer surface of the air filter cotton in the prior art to generate collision and friction. Therefore, the problem that chippings fall into the suction bin from the air filter cotton can be further reduced; and therefore, impurities absorbed during high-temperature spheroidizing of the metal powder are reduced, and the product quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of powder spheroidization, and particularly relates to a vacuum powder feeding module of a radio frequency plasma spheroidization device. Background Art

[0002] The radio frequency plasma spheroidization technology is commonly used for the spheroidization processing of metal powders. A radio frequency plasma spheroidization device usually consists of a powder collection module, a vacuum powder feeding module, a plasma reaction torch module, and an auxiliary module.

[0003] The vacuum powder feeding module is a dust-free closed pipeline conveying device that conveys granular and powdery materials by means of vacuum suction. Utilizing the air pressure difference between the vacuum and the ambient space, it forms gas flow in the pipeline, drives the powdery material to move, and thus completes the conveying of the powder. It is a device for continuously conveying dust-like and small granular materials, and can be flexibly conveyed horizontally, obliquely, or vertically.

[0004] In the traditional technology, the vacuum powder feeding module includes an air suction pipe vertically arranged at the top of the inner cavity of the material suction bin. The side wall and bottom surface of the air suction pipe are sleeved with air filter cotton. During the air suction and exhaust processes, there will be a phenomenon that metal powder impacts the air filter cotton or the metal powder rubs in the void channels on the surface layer of the air filter cotton. This phenomenon will cause the air filter cotton to generate debris, and the debris will be mixed as impurities in the metal powder stream for radio frequency plasma spheroidization, which will reduce the final product quality. Summary of the Invention

[0005] In order to overcome the problem of "the air filter cotton of the traditional vacuum powder feeding module will generate debris, further reducing the quality of spherical metal powder" existing in the above background art, the utility model provides a vacuum powder feeding module of a radio frequency plasma spheroidization device.

[0006] The technical solution adopted by the utility model to solve the above technical problems is:

[0007] A vacuum powder feeding module of a radio frequency plasma spheroidizing device, comprising a material suction bin, wherein a feed connection pipe connected to a suction pipe is provided on the side wall of the material suction bin; on the upper surface of the top plate of the material suction bin, there is an air suction bin, and a partition is vertically arranged in the air suction bin, and the inner cavity of the air suction bin is divided into a first cavity and a second cavity by the partition; the bottom of the first cavity is communicated with the inner cavity of the material suction bin; a plurality of air suction pipes are inserted into the partition, and all of the air suction pipes are arranged in the upper middle part of the partition; 80% of the length of the air suction pipe is arranged in the second cavity; an air filter cotton is sleeved on the surface of the part of the air suction pipe placed in the second cavity; the side wall of the second cavity far away from the partition is connected and communicated with an air pump, and the air pump is connected and communicated with a gas cylinder through a filter bin; the bottom plate of the material suction bin is in an inverted conical shape, and a blanking hole is opened in the middle of the bottom plate of the material suction bin; a blanking bin is fixedly installed on the lower surface of the bottom plate of the material suction bin, and the material suction bin is communicated with the blanking bin through the blanking hole; a feeding pipe is connected and communicated at the opening position at the bottom end of the blanking bin, and a valve is installed in the middle of the feeding pipe.

[0008] As a further optimized scheme of the present utility model, the upper middle part of the side wall of the material suction bin is in the shape of a straight cylinder with a fixed diameter.

[0009] As a further optimized scheme of the present utility model, it further comprises a support assembly, and the support assembly is provided with an installation hole adapted to the diameter of the upper middle part of the side wall of the material suction bin; an extension fin is provided at the top of the side wall of the material suction bin, and the lower surface of the extension fin is pressed against the upper surface of the support assembly.

[0010] As a further optimized scheme of the present utility model, the support assembly comprises a support ring, an extension pedestal and an extension rod; the installation hole is opened in the middle of the support ring, and the extension pedestal and the extension rod are respectively arranged at both ends of the support ring and fixedly installed; a plurality of upright columns are respectively installed on the lower bottom surface of the extension pedestal and the lower bottom surface of the extension rod.

[0011] As a further optimized scheme of the present utility model, the bottom end of the upright column is fixedly connected to the plasma reaction torch module.

[0012] As a further optimized scheme of the present utility model, the air pump is fixedly installed on the upper surface of the extension pedestal.

[0013] As a further optimized scheme of the present utility model, the filter bin is fixedly installed on the upper surface of the extension pedestal.

[0014] As a further optimized scheme of the present utility model, the top plate of the air suction bin is in an openable and closable state.

[0015] As a further optimized scheme of the present utility model, the partition is respectively clamped with the top plate, side plate and bottom plate of the air suction bin, and a sealing structure is provided at the clamping position.

[0016] As a further optimized solution of the present utility model, filter cotton is provided in the filter chamber.

[0017] In summary, the beneficial effects of the present utility model are as follows: The material suction bin, the first cavity, and the second cavity are connected in sequence, and the material suction bin is located below the first cavity and the second cavity, while the suction pipe is arranged in the upper middle parts of the first cavity and the second cavity, so that there is a height difference as large as possible between the suction pipe and the material suction bin. Then, it is more difficult for the metal powder to be sucked into the first cavity under the action of gravity. Therefore, a smaller amount of metal powder can move upward to the vicinity of the suction pipe, so that the amount of metal powder adhering to the air filter cotton is less, and further reduces the problem of debris generated by the impact and friction of the air filter cotton by the metal powder. The air filter cotton is sleeved on a part of the surface of the suction pipe located in the second cavity, so that the metal powder can only contact the end face of the inner cavity of the air filter cotton, while in the traditional technology, the metal powder can contact the entire outer surface of the air filter cotton and cause impact and friction. Therefore, the present utility model can further reduce the problem of debris falling into the material suction bin by the air filter cotton; with less debris, the impurities absorbed by the metal powder during high-temperature spheroidization by the plasma reaction torch module are reduced, and the product quality is improved. Description of the Drawings

[0018] The following further describes the present application with reference to the drawings:

[0019] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 is a schematic diagram of the structure of the air suction bin;

[0021] Figure 3 is a schematic diagram of the structure of the support assembly;

[0022] Figure 4 is a schematic diagram of the front view of the vertical section of the partition board;

[0023] Figure 5 is a schematic diagram of the top view of the horizontal section of the partition board;

[0024] Figure 6 is a schematic diagram of the closed state of the top plate of the air suction bin;

[0025] Figure 7 is a schematic diagram of the connection relationship of the backwash air pipe.

[0026] Description of the Reference Numerals:

[0027] In the figure,

[0028] 1. Material suction bin; 11. Feed connection pipe;

[0029] 2. Suction chamber; 21. Partition; 22. First cavity; 23. Second cavity; 24. Suction pipe; 25. Air filter cotton;

[0030] 3. Air pump; 31. Gas cylinder; 32. First gas valve; 33. Second gas valve; 34. Backwashing air pipe;

[0031] 4. Filter chamber;

[0032] 5. Support assembly; 51. Support ring; 52. Extension pedestal; 53. Extension rod;

[0033] 6. Hopper;

[0034] 7. Feeding pipe;

[0035] 8. Valve. Specific implementation mode

[0036] Based on the above structural characteristics of the present application, the implementation mode of the present application is further described as follows:

[0037] Refer to Figures 1 to 5 , this embodiment provides a vacuum powder feeding module of a radio frequency plasma spheroidizing device, including a material suction chamber 1, and a feed connection pipe 11 connected to a suction pipe is provided on the side wall of the material suction chamber 1. The material suction chamber 1 is arranged above the plasma reaction torch module, and the plasma reaction torch module is arranged on the workbench in the workshop; there is metal powder in the container, and the container is placed on the workbench; one end of the suction pipe far from the feed connection pipe 11 is inserted into the metal powder in the container.

[0038] Refer to Figure 1 And Figure 2 , on the upper surface of the top plate of the material suction chamber 1, there is a suction chamber 2, and a partition 21 is vertically arranged in the suction chamber 2. The partition 21 divides the inner cavity of the suction chamber 2 into a first cavity 22 and a second cavity 23; the bottom of the first cavity 22 is communicated with the inner cavity of the material suction chamber 1.

[0039] Refer to Figure 1 And Figure 2 , a suction pipe 24 is inserted into the partition 21, and the outer wall of the suction pipe 24 is sealed with the partition 21 by welding. 80% of the length of the suction pipe 24 is arranged in the second cavity 23; an air filter cotton 25 is sleeved on the surface of the part of the suction pipe 24 placed in the second cavity 23. There are several suction pipes 24 and they are all arranged in the upper middle part of the partition 21, so that the height difference between the suction pipe 24 and the material suction chamber 1 is as large as possible. Then, it is more difficult for the metal powder to be sucked into the first cavity 22 under the action of gravity. Therefore, a smaller amount of metal powder can move upward to the vicinity of the suction pipe 24, so that the amount of metal powder adhered to the air filter cotton 25 is less, and further reduces the problem of debris generated by the impact and friction of the air filter cotton 25 by the metal powder.

[0040] One end of the air suction pipe 24 away from the partition plate 21 is inclined upward by 20 degrees, so that the metal powder accumulated in the air suction pipe 24 during the backwashing process can be more easily blown into the first cavity 22, avoiding blockage of the air suction pipe 24 by the metal powder.

[0041] Refer to Figure 3 and Figure 7 , the side wall of the second cavity 23 away from the partition plate 21 is connected and communicated with the air pump 3 through the first air pipe, the air pump 3 is connected and communicated with the filter bin 4 through the second air pipe, and the filter bin 4 is connected and communicated with the gas cylinder 31 through the third air pipe. A filter cotton is provided in the filter bin 4. A first air valve 32 is installed in the middle of the first air pipe. It further includes a backwashing air pipe 34. One end of the backwashing air pipe 34 is connected and communicated with the first air pipe through a first three-way joint, and the first three-way joint is arranged between the first air valve 32 and the second cavity 23; the other end of the backwashing air pipe 34 is connected and communicated with the third air pipe through a second three-way joint. A second air valve 33 is installed in the middle of the backwashing air pipe 34. During vacuum powder suction, the first air valve 32 is opened and the second air valve 33 is closed, so that the gas in the second cavity 23 is sucked into the gas cylinder 31; during powder injection, the first air valve 32 is closed and the second air valve 33 is opened, and the gas in the gas cylinder 31 flows into the second cavity 23 through the backwashing air pipe 34 bypassing the air pump 3.

[0042] Refer to Figure 1 , the bottom plate of the material suction bin 1 is in an inverted conical shape, and a blanking hole is opened in the middle of the bottom plate of the material suction bin 1; a blanking bin 6 is fixedly installed on the lower surface of the bottom plate of the material suction bin 1 (for example, sealed and fixedly connected by welding), and the material suction bin 1 is communicated with the blanking bin 6 through the blanking hole; the bottom opening position of the blanking bin 6 is connected with a feeding pipe 7 and is communicated with each other (for example, sealed and fixedly connected by welding), and a valve 8 is installed in the middle of the feeding pipe 7. During vacuum powder suction, the valve 8 needs to be closed; during powder injection, the valve 8 needs to be opened.

[0043] Refer to Figure 1 and Figure 3 , the middle upper part of the side wall of the material suction bin 1 is in the shape of a straight cylinder with a fixed diameter. It further includes a support assembly 5. The support assembly 5 is provided with an installation hole adapted to the diameter of the middle upper part of the side wall of the material suction bin 1, and the material suction bin 1 is installed in the installation hole. An extension fin is provided at the top of the side wall of the material suction bin 1 (for example, fixedly connected by bolts or integrally), and the lower surface of the extension fin is pressed against the upper surface of the support assembly 5.

[0044] Refer to Figure 1 and Figure 3, the support component 5 includes a support ring 51, an extension pedestal 52 and an extension rod 53; the mounting hole is opened in the middle of the support ring 51, and the extension fin is fixedly connected to the support ring 51 by bolts; the extension pedestal 52 and the extension rod 53 are respectively arranged at both ends of the support ring 51 and fixedly installed (for example, fixedly connected by bolts or integrally fixedly connected); a plurality of columns are respectively installed at the lower bottom surfaces of the extension pedestal 52 and the extension rod 53 by bolts, and the bottom ends of the columns are fixedly connected to the top surface of the plasma torch module by bolts, so as to realize that the metal powder in the blanking bin 6 flows into the plasma torch module under the combined action of air flow and gravity.

[0045] Referring to Figure 3 , the air pump 3 is fixedly installed on the upper surface of the extension pedestal 52. The filter bin 4 is fixedly installed on the upper surface of the extension pedestal 52. The gas cylinder 31 is hung by a hook at the side wall or bottom position of the extension pedestal 52; the first gas valve 32 and the second gas valve 33 are both installed on the front side wall position of the extension pedestal 52 by bolts.

[0046] Referring to Figure 6 , the top plate of the air suction bin 2 is in an openable and closable state; the top plate is provided with a sealing ring, and the top plate and the side plate of the air suction bin 2 are detachably pressed by bolts, so as to realize the sealing of the top of the air suction bin 2. During use, some debris of the air filter cotton 25 that has fallen will accumulate at the bottom of the second cavity 23. The user opens the top plate of the air suction bin 2, pulls out the partition plate 21, and then can clean the air suction pipe 24, replace the air filter cotton 25 and clean the bottom of the second cavity 23.

[0047] Referring to Figure 4 With Figure 5 , the partition plate 21 is respectively clamped with the top plate, side plate and bottom plate of the air suction bin 2, and a sealing structure is provided at the clamping position; the partition plate 21 is in a rectangular straight plate structure, and the sealing structure is a sealing strip ring wrapped around the outer edge of the partition plate 21.

[0048] In the present utility model, the material suction bin 1, the first cavity 22, and the second cavity 23 are communicated in sequence, and the material suction bin 1 is located below the first cavity 22 and the second cavity 23. The air suction pipe 24 is arranged in the upper middle parts of the first cavity 22 and the second cavity 23, so that there is as large a height difference as possible between the air suction pipe 24 and the material suction bin 1. Then, it is more difficult for the metal powder to be sucked into the first cavity 22 under the action of gravity. Therefore, a smaller amount of metal powder can move upward to the vicinity of the air suction pipe 24, so that the amount of metal powder adhered to the air filter cotton 25 is less, and further reduces the problem of debris generated by the impact and friction of the air filter cotton 25 by the metal powder. The air filter cotton 25 is sleeved on a part of the surface of the air suction pipe 24 located in the second cavity 23, so that the metal powder can only contact the end face of the inner cavity of the air filter cotton 25. In the traditional technology, the metal powder can contact the entire outer surface of the air filter cotton 25 and cause impact and friction. Therefore, the present utility model can further reduce the problem of debris falling into the material suction bin 1 from the air filter cotton 25; with less debris, the impurities absorbed by the metal powder during high-temperature spheroidization by the plasma reaction torch module are reduced, and the product quality is improved.

[0049] The present utility model further includes an electrical cabinet, which is fixedly installed on the surface of the workbench by bolts; the air pump 3, the first air valve 32, the second air valve 33, and the valve 8 are respectively connected to the electrical cabinet through wires and signal lines; the electrical cabinet is respectively connected to an external power supply and an external computer through wires and signal lines, and the computer controls the start and stop of the air pump 3, the first air valve 32, the second air valve 33, and the valve 8 in the present utility model through the electrical cabinet.

[0050] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to the present utility model.

[0051] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection, an electrical connection. It can be a direct connection, or a connection through an intermediate medium. It can be the communication between two elements inside. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0052] In summary, for those skilled in the art, based on the guidance of the present utility model, without departing from the principles and spirit of the present utility model, the changes, modifications, substitutions, and deformations made to the present utility model still fall within the protection scope of the present utility model.

Claims

1. A vacuum powder feeding module of a radio frequency plasma spheroidizing device, characterized in that: It includes a material suction bin (1), and a feed connection pipe (11) connected to a suction pipe is provided on the side wall of the material suction bin (1); On the upper surface of the top plate of the material suction bin (1), there is an air suction bin (2). Inside the air suction bin (2), a partition plate (21) is vertically arranged. The partition plate (21) divides the inner cavity of the air suction bin (2) into a first cavity (22) and a second cavity (23); the bottom of the first cavity (22) is communicated with the inner cavity of the material suction bin (1); The partition plate (21) is inserted with air suction pipes (24). There are several air suction pipes (24) and they are all arranged in the upper middle part of the partition plate (21); 80% of the length of the air suction pipe (24) is arranged in the second cavity (23); an air filter cotton (25) is sleeved on the surface of the part of the air suction pipe (24) placed in the second cavity (23); the side wall of the second cavity (23) far from the partition plate (21) is connected and communicated with an air pump (3), and the air pump (3) is connected and communicated with a gas cylinder (31) through a filter bin (4); The bottom plate of the material suction bin (1) is in an inverted conical shape, and a material dropping hole is opened in the middle of the bottom plate of the material suction bin (1); a material dropping bin (6) is fixedly installed on the lower surface of the bottom plate of the material suction bin (1), and the material suction bin (1) is communicated with the material dropping bin (6) through the material dropping hole; a feeding pipe (7) is connected to the opening position at the bottom end of the material dropping bin (6) and is communicated with each other, and a valve (8) is installed in the middle of the feeding pipe (7).

2. The vacuum powder feeding module of the radio frequency plasma spheroidization device according to claim 1, characterized in that: The middle upper part of the side wall of the material suction bin (1) is in the shape of a straight cylinder with a fixed diameter.

3. The vacuum powder feeding module of the radio frequency plasma spheroidizing device according to claim 2, characterized in that: It further includes a support assembly (5). The support assembly (5) is provided with an installation hole adapted to the diameter of the middle upper part of the side wall of the material suction bin (1); an extension fin is provided at the top of the side wall of the material suction bin (1), and the lower surface of the extension fin is pressed against the upper surface of the support assembly (5).

4. The vacuum powder feeding module of the radio frequency plasma spheroidizing device according to claim 3, characterized in that: The support assembly (5) includes a support ring (51), an extension pedestal (52) and an extension rod (53); the installation hole is opened in the middle of the support ring (51), and the extension pedestal (52) and the extension rod (53) are respectively arranged at both ends of the support ring (51) and fixedly installed; a number of columns are respectively installed on the lower bottom surface of the extension pedestal (52) and the lower bottom surface of the extension rod (53).

5. The vacuum powder feeding module of the radio frequency plasma spheroidization device according to claim 4, characterized in that: The bottom end of the column is fixedly connected to the plasma reaction torch module.

6. The vacuum powder feeding module of the radio frequency plasma spheroidization device according to claim 5, characterized in that: The air pump (3) is fixedly installed on the upper surface of the extension pedestal (52).

7. The vacuum powder feeding module of the radio frequency plasma spheroidizing device according to claim 6, characterized in that: The filter bin (4) is fixedly installed on the upper surface of the extension pedestal (52).

8. The vacuum powder feeding module of the radio frequency plasma spheroidization device according to claim 7, characterized in that: The top plate of the air suction bin (2) is in an openable and closable state.

9. The vacuum powder feeding module of the radio frequency plasma spheroidization device according to claim 8, characterized in that: The partition plate (21) is respectively clamped with the top plate, side plate and bottom plate of the air suction bin (2), and a sealing structure is provided at the clamping position.

10. The vacuum powder feeding module of the radio frequency plasma spheroidizing device according to claim 9, characterized in that: The filter bin (4) is provided with filter cotton.

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