Cooling module of radio frequency plasma spheroidizing device

Abstract

The utility model discloses a cooling module of a radio frequency plasma spheroidizing device, which relates to the technical field of spherical powder processing equipment, and comprises a cooling shell arranged on the surface of a torch body, and the shell comprises a plurality of cooling units; a fluid channel is arranged in the cooling unit and comprises a vertical channel and a horizontal channel; each cooling unit is internally provided with a vertical channel and a plurality of horizontal channels, and the horizontal channels are arranged in a fan shape and matched with the top plate. Cooling fluid capable of absorbing and taking away heat is arranged in the fluid channel, so that the torch body is cooled, and the situation that the temperature of the torch body is too high and exceeds the working range is avoided. The fluid channels comprise the vertical channels with the flat sections and the horizontal channels with the circular sections, the horizontal channels are arranged in a fan shape, the ends of the horizontal channels communicate with the vertical channels, and therefore strip-shaped water flow is formed in the vertical channels, and the problem that cooling is uneven due to the fact that dead points exist in water circulation in the vertical channels in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of spherical powder processing equipment, and particularly relates to a cooling module of a radio frequency plasma spheroidizing device. Background Art

[0002] The raw materials used in many 3D printing processes are spherical powders, and the quality of the spherical powders will directly affect the stability of the process during printing, and ultimately affect the quality of the printed and formed parts.

[0003] The radio frequency plasma spheroidizing device is a commonly used spherical powder forming equipment, and water cooling is a commonly used cooling method for the radio frequency plasma spheroidizing device. The circulating water flows through the plasma torch and then into the cooling module for heat dissipation to ensure that the temperature of the side wall of the plasma torch and / or the cooling area is within the required range.

[0004] The torch body of the traditional radio frequency plasma spheroidizing device has a cylindrical structure. A double-layer cylindrical vertical channel is provided in the side wall of the torch body for cooling, and water inlet and outlet nozzles are installed on the top surface of the torch body to inject and discharge cooling water. However, the dot-shaped water inlet and outlet nozzles communicating with the vertical channel with a double-layer annular cross-section will cause a large number of dead water areas, resulting in a decrease in the cooling uniformity of the torch body. Summary of the Invention

[0005] In order to overcome the problem of "the dot-shaped water inlet and outlet nozzles communicating with the vertical channel with a double-layer annular cross-section will cause a large number of dead water areas, resulting in a decrease in the cooling uniformity of the torch body" existing in the above background art, the utility model provides a cooling module of a radio frequency plasma spheroidizing device.

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

[0007] A cooling module of a radio frequency plasma spheroidizing device, comprising a cooling housing installed on the surface of a torch body. The housing includes a number of cooling units arranged in a circumferential array and connected to each other left and right; a heat conducting plate is provided between the torch body and the cooling units; each cooling unit includes a vertical plate, a top plate and a bottom plate fixedly connected in a "C" shape; the vertical plate is an arc-shaped plate structure, the inner side wall of the vertical plate is adapted to the outer side wall of the torch body, the top plate is perpendicularly and fixedly connected to the top of the vertical plate, and the bottom plate is perpendicularly and fixedly connected to the bottom of the vertical plate; the top plate is in the shape of a sector plate, and the bottom plate is in the shape of a sector plate; a fluid passage is provided in each cooling unit, and the fluid passage includes a vertically arranged passage and a horizontally arranged passage that communicate with each other. The cross-section of the vertically arranged passage is flat and is located in the vertical plate, and the cross-section of the horizontally arranged passage is circular and is located in the top plate; one vertically arranged passage and a number of horizontally arranged passages are provided in each cooling unit, and the horizontally arranged passages are arranged in a fan shape and are adapted to the top plate; a countersunk hole is provided between adjacent horizontally arranged passages, and a first mounting bolt is provided in the countersunk hole. The top plate and the top surface of the torch body are pressed together by the first mounting bolt; a hoop is sleeved on the outer side wall of the housing, and the vertical plate and the side wall of the torch body are pressed together by the hoop; the bottom plate is fixedly connected to the bottom surface of the torch body by a second mounting bolt; both ends of the fluid passage are respectively communicated with a water inlet nozzle and a drain nozzle.

[0008] As a further optimized solution of the present utility model, the water inlet nozzle and the drain nozzle are fixedly installed on the upper surface of the top plate, and the water inlet nozzle, the horizontally arranged passage, the vertically arranged passage and the drain nozzle are sequentially communicated.

[0009] As a further optimized solution of the present utility model, the water inlet nozzle is connected and communicated with a liquid pump through an external water pipe, the liquid pump is connected and communicated with the drain port of an external water tank through an external water pipe, and the drain nozzle is connected and communicated with the water return port of the external water tank through an external water pipe.

[0010] As a further optimized solution of the present utility model, a first relief groove is provided at the proximal end of the top plate, and the first relief groove is adapted to the side wall of the feed nozzle on the top surface of the torch body.

[0011] As a further optimized solution of the present utility model, a second relief groove is provided at the proximal end of the bottom plate, and the second relief groove is adapted to the discharge port on the bottom surface of the torch body.

[0012] As a further optimized solution of the present utility model, the torch body and the cooling housing are pressed above the support assembly.

[0013] As a further optimized solution of the present utility model, the support assembly includes a column and a support frame fixedly connected to each other, and the bottom plate is pressed between the torch body and the support frame.

[0014] As a further optimization solution of the present utility model, a material feeding opening adapted to the second relief groove is provided in the middle of the support frame, and the material feeding opening is directly below the discharging opening at the bottom surface of the torch body.

[0015] As a further optimization solution of the present utility model, the support frame is in a cross shape; the columns are respectively arranged in the installation grooves at the four corners of the support frame and are fixedly connected.

[0016] As a further optimization solution of the present utility model, the heat conducting plate is a copper plate.

[0017] To sum up, the beneficial effects of the present utility model are as follows: The cooling unit of the present invention is wrapped on the surface of the radio frequency plasma torch body. A fluid channel corresponding to the working position of the torch body is provided in the cooling unit, and a cooling fluid capable of absorbing and taking away heat is provided in the fluid channel, so as to realize the cooling of the torch body and avoid the torch body temperature being too high and exceeding the working range; the fluid channel includes a vertical channel with a flat cross section and a horizontal channel with a circular cross section. A plurality of horizontal channels are arranged in a fan shape and the ends are communicated with the vertical channel, so as to form a strip-shaped water flow in the vertical channel and avoid the problem of uneven cooling caused by dead points in the water circulation in the vertical channel in the traditional technology. Description of the Drawings

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

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

[0020] Figure 2 is the horizontal cross-sectional top view structure schematic diagram of the present utility model;

[0021] Figure 3 is the structure schematic diagram of a single cooling unit;

[0022] Figure 4 is the structure schematic diagram of the vertical plate;

[0023] Figure 5 is the vertical cross-sectional structure schematic diagram of the fluid channel;

[0024] Figure 6 is the top view structure schematic diagram of the fluid channel;

[0025] Figure 7 is the installation state schematic diagram of the ferrule;

[0026] Figure 8 is the crimping state schematic diagram of the torch body, the bottom plate and the support assembly;

[0027] Figure 9 is the top view structure schematic diagram of the support frame.

[0028] Description of the Reference Numerals:

[0029] In the figure,

[0030] 1. Torch body; 11. Feed nozzle;

[0031] 2. Cooling housing; 21. Cooling unit; 211. Vertical plate; 212. Top plate; 2121. First relief groove; 2122. Countersunk hole; 213. Bottom plate; 22. Fluid channel; 221. Vertical channel; 222. Horizontal channel;

[0032] 3. Heat conducting plate;

[0033] 4. Water inlet nozzle;

[0034] 5. Drain nozzle;

[0035] 6. Ferrule;

[0036] 7. Support assembly; 71. Column; 72. Support frame; 721. Relief material opening. Detailed implementation manner

[0037] Based on the above structural features of the present application, the implementation manner of the present application is further described as follows:

[0038] Referring to Figures 1 to 3 , this embodiment provides a cooling module of a radio frequency plasma spheroidizing device, including a cooling housing 2 installed on the surface of the torch body 1. The housing includes a plurality of cooling units 21 arranged in a circumferential array and connected end to end left and right; the cooling unit 21 can cover the side wall of the torch body 1, the non-feed port part of the top surface of the torch body 1, and the non-discharge port part of the bottom surface of the torch body 1, on the one hand, for cooling the required parts of the torch body 1, and on the other hand, realizing the convenient and stable installation of the cooling unit 21.

[0039] Referring to Figure 2 , a heat conducting plate 3 is provided between the torch body 1 and the cooling unit 21. The heat conducting plate 3 is a copper plate, which is used to quickly conduct the heat of the torch body 1 to the cooling unit 21, thereby avoiding heat accumulation.

[0040] Referring to Figure 3 ~Figure 4, the cooling unit 21 includes a vertical plate 211, a top plate 212 and a bottom plate 213 fixedly connected in a "C" shape (for example, formed by integral molding or by modular splicing, and the modular splicing position is fixed by bolts and sealed by a sealing strip). The vertical plate 211 is an arc-shaped plate structure, the inner side wall of the vertical plate 211 is adapted to the outer side wall of the torch body 1, the top plate 212 is vertically fixedly connected to the top of the vertical plate 211, and the bottom plate 213 is vertically fixedly connected to the bottom of the vertical plate 211.

[0041] Referring to Figure 3 , the top plate 212 is in the shape of a sector plate, and the bottom plate 213 is in the shape of a sector plate.

[0042] Reference Figure 5 With Figure 6 As shown in FIGS. 1-3, a fluid channel 22 is provided in the cooling unit 21. The fluid channel 22 includes a vertically arranged channel 221 and a horizontally arranged channel 222 that communicate with each other. The cross-section of the vertically arranged channel 221 is flat and is located within the vertical plate 211, and the cross-section of the horizontally arranged channel 222 is circular and is located within the top plate 212. A cooling fluid that can circulate is provided in the vertically arranged channel 221 and the horizontally arranged channel 222. The cooling fluid is used to take away the heat in the cooling unit 21.

[0043] Reference Figure 5 With Figure 6 As shown in FIGS. 4-6, one vertically arranged channel 221 and several horizontally arranged channels 222 are provided in each cooling unit 21. The horizontally arranged channels 222 are arranged in a fan shape and are adapted to the top plate 212; a counterbore 2122 is provided between adjacent horizontally arranged channels 222, and a first mounting bolt is provided in the counterbore 2122. The top plate 212 and the top surface of the torch body 1 are crimped by the first mounting bolt. Under the pulling action of the first mounting bolt, the top plate 212, the heat conducting plate 3 and the top surface of the torch body 1 are mutually crimped to achieve heat transfer.

[0044] Reference Figure 5 As shown in FIGS. 7-8, the horizontal channel 222 has a C-shaped trend, and the vertical channel 221 has a U-shaped trend.

[0045] Reference Figure 7 As shown in FIGS. 9-10, a hoop 6 is sleeved on the outer side wall of the housing, and the vertical plate 211 and the side wall of the torch body 1 are crimped by the hoop 6. Under the tightening force of the hoop 6, the vertical plate 211, the heat conducting plate 3 and the side wall of the torch body 1 are mutually crimped to achieve heat transfer.

[0046] The bottom plate 213 is fixedly connected to the bottom surface of the torch body 1 through a second mounting bolt, so as to prevent a gap that causes the present utility model to bounce from appearing between the bottom plate 213 and the bottom surface of the torch body 1.

[0047] Reference Figure 5 With Figure 6 As shown in FIGS. 11-12, both ends of the fluid channel 22 are respectively communicated with a water inlet nozzle 4 and a water drain nozzle 5. The water inlet nozzle 4 and the water drain nozzle 5 are fixedly installed on the upper surface of the top plate 212, and the water inlet nozzle 4, the horizontal channel 222, the vertical channel 221 and the water drain nozzle 5 are sequentially communicated. The water inlet nozzle 4 is communicated with the top end of the horizontal channel 222, the bottom end of the horizontal channel 222 is communicated with the side of the vertical channel 221 close to the torch body 1, and the side of the vertical channel 221 far from the torch body 1 is communicated with the water drain nozzle 5; so that the cooling water preferentially flows through the horizontal channel 222 and the side of the vertical channel 221 close to the torch body 1, and then the heated cooling water is discharged through the side of the vertical channel 221 far from the torch body 1, thereby having a better cooling effect and avoiding the cooling effect from deteriorating due to the heated cooling water flowing through the side of the vertical channel 221 close to the torch body 1.

[0048] The water inlet nozzle 4 is connected and communicated with the liquid pump through an external water pipe. The liquid pump is connected and communicated with the drain outlet of the external water tank through an external water pipe. The drain nozzle 5 is connected and communicated with the water return port of the external water tank through an external water pipe. The external water tank and the liquid pump are placed on the workbench in the workshop.

[0049] Referring to Figure 3 , a first relief groove 2121 is provided at the proximal end of the top plate 212. The first relief groove 2121 is adapted to the side wall of the feed nozzle 11 on the top surface of the torch body 1. A second relief groove is provided at the proximal end of the bottom plate 213. The second relief groove is adapted to the discharge port on the bottom surface of the torch body 1.

[0050] Referring to Figure 8 and Figure 9 , the torch body 1 and the cooling housing 2 are crimped above the support assembly 7, so as to stabilize the torch body 1 at the required height to facilitate the opening of the door body at the discharge port position. The support assembly 7 includes a column 71 and a support frame 72 that are fixedly connected to each other (for example, fixedly connected by bolts). The bottom plate 213 is crimped between the torch body 1 and the support frame 72. A relief material port 721 adapted to the second relief groove is provided in the middle of the support frame 72. The relief material port 721 is placed directly below the discharge port on the bottom surface of the torch body 1. The support frame 72 is in a cross shape to adapt to the bottom plate 213; the columns 71 are respectively arranged in the installation grooves at the four corners of the support frame 72 and are fixedly connected.

[0051] Since condensed water inevitably appears during the working process of the present utility model, the condensed water appears in the gap between the torch body 1 and the heat conducting plate 3 and the gap between the heat conducting plate 3 and the cooling housing 2. Therefore, a plurality of water permeable holes are provided in the bottom plate 213. The water permeable holes are arranged in a double-layer ring shape and are respectively adapted to the connection positions between the torch body 1 and the heat conducting plate 3 and between the heat conducting plate 3 and the cooling housing 2 to discharge the condensed water.

[0052] The cooling fluid is water.

[0053] The cooling unit 21 of the present invention is wrapped on the surface of the radio frequency plasma torch body 1. A fluid channel 22 corresponding to the working position of the torch body 1 is provided in the cooling unit 21. A cooling fluid capable of absorbing and taking away heat is provided in the fluid channel 22 to cool the torch body 1 and prevent the temperature of the torch body 1 from being too high and exceeding the working range; the fluid channel 22 includes a vertical channel 221 with a flat cross section and a horizontal channel 222 with a circular cross section. A plurality of horizontal channels 222 are arranged in a fan shape and the ends are communicated with the vertical channel 221. While the horizontal channels 222 cool the top surface of the torch body 1, a strip-shaped water flow is formed in the vertical channel 221, improving the fluidity of the cooling water in the vertical channel 221 and avoiding the problem of uneven cooling caused by dead spots in the water circulation in the vertical channel 221 in the traditional technology.

[0054] 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 should not be construed as a limitation to the present utility model.

[0055] 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 inside two elements. 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 circumstances.

[0056] In summary, for those skilled in the art, based on the guidance of the present utility model, without departing from the principle 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 cooling module of a radio frequency plasma spheroidizing device, characterized in that: It includes a cooling housing (2) installed on the surface of the torch body (1), and the housing includes a number of cooling units (21) arranged in a circumferential array and connected end to end on the left and right; A heat conduction plate (3) is provided between the torch body (1) and the cooling unit (21); The cooling unit (21) includes a vertical plate (211), a top plate (212) and a bottom plate (213) fixedly connected in a "C" shape; the vertical plate (211) is an arc-shaped plate structure, and the inner side wall of the vertical plate (211) is adapted to the outer side wall of the torch body (1), the top plate (212) is vertically fixedly connected to the top of the vertical plate (211), and the bottom plate (213) is vertically fixedly connected to the bottom of the vertical plate (211); The top plate (212) is in the shape of a sector plate, and the bottom plate (213) is in the shape of a sector plate; A fluid channel (22) is provided in the cooling unit (21), and the fluid channel (22) includes a vertical channel (221) and a horizontal channel (222) that are interconnected. The cross-section of the vertical channel (221) is flat and is located in the vertical plate (211), and the cross-section of the horizontal channel (222) is circular and is located in the top plate (212); Each cooling unit (21) is provided with one vertical channel (221) and a number of horizontal channels (222). The horizontal channels (222) are arranged in a fan shape and are adapted to the top plate (212); a countersunk hole (2122) is provided between adjacent horizontal channels (222), and a first mounting bolt is provided in the countersunk hole (2122). The top plate (212) and the top surface of the torch body (1) are crimped by the first mounting bolt; A hoop (6) is sleeved on the outer side wall of the housing, and the vertical plate (211) and the side wall of the torch body (1) are crimped by the hoop (6); The bottom plate (213) is fixedly connected to the bottom surface of the torch body (1) by a second mounting bolt; Both ends of the fluid channel (22) are respectively communicated with a water inlet nozzle (4) and a water drain nozzle (5).

2. The cooling module of the radio frequency plasma spheroidization device according to claim 1, characterized in that: The water inlet nozzle (4) and the water drain nozzle (5) are fixedly installed on the upper surface of the top plate (212), and the water inlet nozzle (4), the horizontal channel (222), the vertical channel (221) and the water drain nozzle (5) are communicated in sequence.

3. The cooling module of the radio frequency plasma spheroidizing device according to claim 2, characterized in that: The water inlet nozzle (4) is connected and communicated with a liquid pump through an external water pipe. The liquid pump is connected and communicated with the drain port of an external water tank through an external water pipe. The water drain nozzle (5) is connected and communicated with the water return port of the external water tank through an external water pipe.

4. The cooling module of the radio frequency plasma spheroidizing device according to claim 3, characterized in that: A first relief groove (2121) is provided at the proximal end of the top plate (212), and the first relief groove (2121) is adapted to the side wall of the feed nozzle (11) on the top surface of the torch body (1).

5. The cooling module of the radio frequency plasma spheroidizing device according to claim 4, characterized in that: A second relief groove is provided at the proximal end of the bottom plate (213), and the second relief groove is adapted to the discharge port on the bottom surface of the torch body (1).

6. The cooling module of the radio frequency plasma spheroidizing device according to claim 5, characterized in that: The torch body (1) and the cooling housing (2) are crimped above the support assembly (7).

7. The cooling module of the radio frequency plasma spheroidization device according to claim 6, characterized in that: The support assembly (7) includes a column (71) and a support frame (72) that are fixedly connected to each other, and the bottom plate (213) is press-fitted between the torch body (1) and the support frame (72).

8. The cooling module of the radio frequency plasma spheroidization device according to claim 7, characterized in that: A material passing port (721) adapted to the second relief groove is provided in the middle of the support frame (72), and the material passing port (721) is directly below the bottom discharge port of the torch body (1).

9. The cooling module of the radio frequency plasma spheroidization device according to claim 8, characterized in that: The support frame (72) is in the shape of a well; the columns (71) are respectively arranged in the installation grooves at the four corners of the support frame (72) and are fixedly connected.

10. The cooling module of the radio frequency plasma spheroidization device according to any one of claims 1-9, characterized in that: The heat conducting plate (3) is a copper plate.

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