Powder spheroidizing equipment

Abstract

The utility model relates to the technical field of powder spheroidizing, and provides powder spheroidizing equipment which comprises a powder feeding gun, a spheroidizing tower, a collecting device and an induced draft fan, the powder feeding gun is arranged at the top of the spheroidizing tower, an outlet at the lower end of the spheroidizing tower is connected with the collecting device through a pipeline, and the induced draft fan is arranged at an outlet at the tail end of the collecting device. The powder feeding gun comprises a powder inlet pipe, a cold air pipe, a water inlet pipe, a water outlet pipe and a hot air pipe which are concentrically arranged from inside to outside, the hot air pipe is provided with a plurality of hot air inlets formed in the tangential direction of the inner wall of the hot air pipe, and hot air forms cyclone in the hot air pipe. According to the scheme, the melting position of powder in the spheroidizing tower is adjusted by controlling the flow of cold air in the cold air pipe, large-particle spherical powder formed during powder melting is reduced, meanwhile, the mixing uniformity, the dispersing effect and the heating uniformity of the powder and hot air are further improved by combining cyclone hot air and the scattering rod, and therefore the powder can be uniformly melted. And the prepared spherical powder is uniform in particle size and stable in product quality.

Description

Technical Field

[0001] This utility model relates to the field of powder spheroidization technology, and in particular to a powder spheroidization device. Background Technology

[0002] With the improvement of production technology, the quality requirements for materials are constantly increasing. Using high-quality materials naturally leads to better product quality. For example, when using spherical resin particles to prepare products, the product has a uniform texture and no gaps in the middle, ensuring its quality. Furthermore, spherical powder has good flowability, high filling rate, excellent mechanical properties, low coefficient of friction, and can extend mold life.

[0003] Excellent mechanical properties: Materials made from spherical powder exhibit minimal stress concentration and maximum strength, enhancing overall strength and durability. Compared to angular powder, the stress in spherical powder is only 60% of that in angular powder. This results in higher yield rates for molding compounds made from spherical powder when encapsulating integrated circuit chips, and reduces the likelihood of mechanical damage during use. Low coefficient of friction, extending mold life: The low coefficient of friction in spherical powder reduces wear on molds, significantly extending their lifespan. Compared to angular powder, mold lifespan can be more than doubled, which is crucial for cost reduction and improved economic efficiency.

[0004] However, existing equipment, especially for low-melting-point powder materials with different melting points, including resins and asphalt with melting points below 650℃, results in uneven spheroidization during the preparation of spherical powders. When spheroidizing powder materials with different melting points, it is impossible to control the difference between the melting position of the powder and the position of the spheroidizing gun inlet, resulting in large and uneven spherical powder particles. Therefore, this is a technical problem that urgently needs to be solved. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned shortcomings of the prior art and provide a powder spheroidizing device that can adjust the height difference between the melting position and the powder inlet during the powder spheroidizing process according to the melting point of different powders, thereby improving the spheroidizing effect and product quality of the powder and reducing the formation of large particles by the powders fusing together during the melting process.

[0006] The technical solution of this utility model is: a powder spheroidizing device, including a powder feeding gun, a spheroidizing tower, a collecting device, and an induced draft fan. The powder feeding gun is set at the top of the spheroidizing tower, and the lower outlet of the spheroidizing tower is connected to the collecting device through a pipe. The fan is set at the end outlet of the collecting device. The powder feeding gun includes a powder inlet pipe, a cold air pipe, a water inlet pipe, a water outlet pipe, and a hot air pipe arranged concentrically from the inside to the outside. Several hot air inlets are arranged along the tangential direction of the inner wall of the hot air pipe, and the hot air forms a cyclone inside the hot air pipe.

[0007] Preferably, the lower end of the powder feeding pipe is provided with a constriction to improve the dispersion effect of the powder, and the upper end of the powder feeding pipe is connected to the powder feeding source; the side of the cold air pipe is provided with an air inlet, which is connected to the cold air source by a thread and can realize the adjustment of the air volume of the cold air, thereby adjusting the position of the powder melting in the spheroidizing tower.

[0008] The advantage of this solution is that it adjusts the melting position of powders with different melting points in the spheroidizing tower by using cold air supply volume, thereby ensuring the dispersion effect of the powder and avoiding the problem of multiple particles fusing together to form large particles when the powder melts. In addition, the hot air at about 600°C is transported in a cyclone manner, which further improves the dispersion effect and heating uniformity of the powder, thereby effectively reducing the occurrence of large particles during the powder spheroidizing process and ensuring product quality and spheroidizing effect.

[0009] Furthermore, 2-8 hot air inlets are provided, and a cyclone guide plate is provided inside the hot air pipe; preferably, 2-3 hot air inlets are provided, and the cyclone guide plate is set along the inner wall of the hot air pipe with a height not exceeding 3cm, so as to ensure the formation of cyclone without affecting the dispersion and heating effect of powder. In addition, the cyclone guide plate can also disperse the powder.

[0010] Furthermore, the spheroidizing tower is equipped with a dispersing rod, which is vertically adjustable via threads on a mounting bracket inside the spheroidizing tower. The dispersing rod is located directly below the powder feeding gun inlet. Preferably, the spheroidizing tower includes an upper cylindrical section and a lower conical section. The cylindrical section is fastened to the top of the conical section by bolts and sealing gaskets. The mounting bracket is fixed to the cylindrical or conical section by bolts or welding. The mounting bracket is a tripod or a cross.

[0011] Even better, the dispersing rod can be manually adjusted up and down via a thread, allowing for height adjustment based on the different melting points of the powder material. The lower the melting point of the powder material, the lower the height of the dispersing rod should be, thus ensuring that the powder material can be dispersed and avoiding premature dispersion that would cause the melting point of the powder in the spheroidizing tower to be too close to the powder outlet. Ideally, the upper end of the dispersing rod is conical, and the diameter of the dispersing rod is not greater than the diameter of the powder outlet.

[0012] Furthermore, the powder feeding gun is installed on the top of the spheroidizing tower via a flange, and the flange is provided with several circumferentially distributed air curtain inlets.

[0013] Furthermore, the air curtain inlet is positioned facing or close to the inner wall of the spheroidizing tower.

[0014] Furthermore, the lower end of the spheroidizing tower is located in a water-cooled jacket, and cooling water flows inside the water-cooled jacket; preferably, the cooling water inlet is located at the lower end of the water-cooled jacket, and the cooling water outlet is located at the upper end of the water-cooled jacket, which improves the cooling effect on the spherical powder by allowing the water to enter from the top and exit from the bottom.

[0015] Furthermore, the collection device includes a cyclone collection device and a bag filter dust collection device. The cyclone collection device is connected to the lower outlet of the spheroidizing tower through a pipe, and the cyclone collection device is connected to the bag filter dust collection device through a pipe. The tail end of the bag filter dust collection device is connected to an induced draft fan through a pipe.

[0016] Furthermore, a second dust collector is provided at the lower end of the cyclone collecting device, a third dust collector is provided at the lower end of the bag filter dust collecting device, and a first dust collector is provided at the lower end of the spheroidizing tower. Preferably, a discharge pipe is provided at the bottom of the spheroidizing tower, the bottom of which is connected to the first dust collector. A branch pipe is provided on the discharge pipe, and the branch pipe is connected to the cyclone collecting device through a pipeline. Solenoid valves are provided on both the discharge pipe and the branch pipe.

[0017] Furthermore, the hot air duct is connected to a heating device via a pipe. The heating device includes an electric heater, a hot air blower, and a filter. The hot air blower is installed on the pipe, the electric heater is installed at the end of the hot air blower away from the powder delivery gun, and the filter is installed between the electric heater and the hot air blower.

[0018] Furthermore, the spheroidizing tower is fixed to the frame by mounting lugs, and the frame is equipped with a bracket for mounting and fixing the powder feeding gun.

[0019] This invention has the following features: by controlling the flow rate of cold air in the cold air duct, the melting position of the powder in the spheroidizing tower is adjusted, which reduces the formation of large spherical powder particles when the powder melts. At the same time, the combination of cyclone hot air and dispersing rod further improves the uniformity of powder mixing with hot air, dispersion effect and uniform heating. The resulting spherical powder particles have uniform particle size and stable product quality.

[0020] The detailed structure of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0021] Figure 1 -Schematic diagram of the spheroidizing tower structure of this utility model;

[0022] Figure 2 - This is a schematic diagram of the structure of this utility model;

[0023] Figure 3 - A schematic diagram of the internal structure of the powder delivery gun;

[0024] Figure 4 -for Figure 1 Top view of the structure;

[0025] 1-Powder inlet, 2-Air inlet, 3-Water inlet, 4-Powder storage bin, 5-Water inlet pipe, 6-Water outlet pipe, 7-Hot air pipe, 8-Heating device, 9-Hanging ear, 10-Cooling water outlet, 11-Cooling water inlet, 12-Discharge pipe, 13-Frame, 14-Water cooling jacket, 15-Conical section, 16-Bolt, 17-Cylindrical section, 18-Flange, 19-Snap fastener, 20-Bracket, 21-First powder collector, 22-Powder feeding gun, 23-Second powder collector, 24-Third powder collector, 25-Bag dust collector, 26-Exhaust fan, 27-Powder feeding pipe, 28-Cold air pipe, 29-Cyclone guide plate, 30-Hot air inlet, 31-Air curtain inlet. Detailed Implementation

[0026] As shown in the attached figure: A powder spheroidizing device includes a powder feeding gun 22, a spheroidizing tower, a collecting device, and an induced draft fan 26. The powder feeding gun 22 is located at the top of the spheroidizing tower. The lower outlet of the spheroidizing tower is connected to the collecting device through a pipe. The fan is located at the end outlet of the collecting device. Preferably, the spheroidizing tower is mounted and fixed on a frame 13 by a hanging lug 9. A bracket 20 is provided on the frame 13 for mounting and fixing the powder feeding gun 22. The powder feeding gun 22 includes a powder inlet pipe, a cold air pipe 28, a water inlet pipe 5, a water outlet pipe 6, and a hot air pipe 7 arranged concentrically from the inside to the outside. Several hot air inlets 30 are provided on the hot air pipe 7 along the tangential direction of the inner wall of the hot air pipe 7, and the hot air forms a cyclone in the hot air pipe 7. The upper ends of the water inlet pipe 5 and the water outlet pipe 6 are respectively provided with a water inlet 3 and a water outlet. The lower ends of the water inlet pipe 5 and the water outlet pipe 6 are connected. The water inlet pipe 5 is located on the inside for better cooling effect.

[0027] Preferably, the lower end of the powder feeding pipe 27 is provided with a constriction to improve the dispersion effect of the powder. The upper end of the powder feeding pipe 27 is connected to the powder storage bin 4. The powder storage bin 4 is provided with a powder inlet 1 at the top, which can be directly connected to the powder feeding source. The side of the cold air pipe 28 is provided with an air inlet 2. The air inlet 2 is connected to the cold air source through a pipe and a thread. The pipe is provided with a solenoid valve to adjust the airflow of the cold air, thereby adjusting the melting position of the powder in the spheroidizing tower. The cold air flowing in the cold air pipe 28 can also cool the powder feeding pipe 27. At the same time, combined with the water inlet and outlet pipes 6, it avoids the powder feeding pipe 27 from being heated and causing the powder material with a lower melting point in the air supply pipe to melt or melt prematurely, which would affect the production quality of the spherical powder.

[0028] This solution adjusts the melting position of powders with different melting points within the spheroidizing tower by controlling the volume of cold air supply, thereby ensuring the dispersion effect of the powder and preventing the formation of large particles by multiple particles fusing together during powder melting. Combined with hot air at around 600℃ delivered in a cyclone manner, the dispersion effect and heating uniformity of the powder are further improved, thus effectively reducing the occurrence of large particles during the powder spheroidizing process and ensuring product quality and spheroidizing effect.

[0029] In this embodiment, 2-8 hot air inlets 30 are provided, and a cyclone guide plate 29 is provided inside the hot air pipe 7. Preferably, 2-3 hot air inlets 30 are provided, and the cyclone guide plate 29 is arranged along the inner wall of the hot air pipe 7 and vertically welded and fixed to the inner wall of the hot air pipe 7. The height of the cyclone guide plate 29 is 1 or 1.5 cm, ensuring the formation of cyclones without affecting the dispersion and heating effect on the powder. In addition, the cyclone guide plate 29 can also disperse the powder. Preferably, the hot air pipe 7 is connected to the heating device 8 through a pipe. The heating device 8 includes an electric heater, a hot air blower, and a filter. The hot air blower is arranged on the pipe, the electric heater is arranged at the end of the hot air blower away from the powder delivery gun 22, and the filter is arranged between the electric heater and the hot air blower.

[0030] In this embodiment, the powder feeding gun 22 is installed on the top of the spheroidizing tower via a flange 18. The flange 18 has several circumferentially distributed air curtain inlets 31. The flange 18 is detachably mounted on the top of the cylindrical section 17 of the spheroidizing tower via clips 19, and a high-temperature resistant sealing gasket is provided at the connection point. Preferably, the air curtain inlets 31 are oriented towards or near the inner wall of the spheroidizing tower. In this embodiment, four air curtain inlets 31 are provided, respectively located at the four positions of the flange 18.

[0031] In this embodiment, the spheroidizing tower includes an upper cylindrical section 17 and a lower conical section 15. The conical section 15 is fixed to the frame 13 by lugs 9 and bolts 16. The cylindrical section 17 is fastened to the top of the conical section 15 by bolts 16 and sealing gaskets. A mounting frame is fixed to the cylindrical section 17 or the conical section 15 by bolts 16 or welding. The mounting frame is a tripod or a cross. A dispersing rod is provided inside the spheroidizing tower. The dispersing rod is vertically adjustable via threads on the mounting frame inside the spheroidizing tower. The dispersing rod is located directly below the inlet of the powder feeding gun 22. Preferably, the dispersing rod can be manually adjusted up and down via threads. The height is adjusted according to the different melting points of the powder material. The lower the melting point of the powder material, the lower the height of the dispersing rod is adjusted accordingly, thereby ensuring that the powder material can be dispersed and avoiding premature dispersion that would cause the melting position of the powder in the spheroidizing tower to be too close to the powder outlet. Ideally, the upper end of the dispersing rod is conical, and the diameter of the dispersing rod is not greater than the diameter of the powder outlet.

[0032] In this embodiment, the lower end of the spheroidizing tower is located in the water-cooled jacket 14, and cooling water flows through the water-cooled jacket 14. Preferably, the cooling water inlet 11 is located at the lower end of the water-cooled jacket 14, and the cooling water outlet 10 is located at the upper end of the water-cooled jacket 14, which improves the cooling effect on the spherical powder by allowing the water to enter from the top and exit from the bottom.

[0033] In this embodiment, the collection device includes a cyclone collector and a bag filter dust collector 25. The cyclone collector is connected to the lower outlet of the spheroidizing tower via a pipe, and the bag filter dust collector 25 is also connected via a pipe. The tail end of the bag filter dust collector 25 is connected to an induced draft fan 26 via a pipe. Preferably, a second dust collector 23 is provided at the lower end of the cyclone collector, a third dust collector 24 is provided at the lower end of the bag filter dust collector 25, and a first dust collector 21 is provided at the lower end of the spheroidizing tower. More preferably, a discharge pipe 12 is provided at the bottom of the spheroidizing tower, the bottom of which is connected to the first dust collector 21. A branch pipe is provided on the discharge pipe 12, and the branch pipe is connected to the cyclone collector via a pipe. Both the discharge pipe 12 and the branch pipe are equipped with solenoid valves.

[0034] This invention adjusts the melting position of powder in the spheroidizing tower by controlling the flow rate of cold air in the cold air duct 28, thereby reducing the formation of large spherical powder particles during powder melting. At the same time, the combination of cyclone hot air and dispersing rod further improves the uniformity of powder mixing with hot air, dispersion effect and heating uniformity, resulting in spherical powder particles with uniform particle size and stable product quality.

[0035] The above describes the preferred embodiment of this utility model and the technical principles used therein. For those skilled in the art, any obvious changes such as equivalent transformations or simple substitutions based on the technical solution of this utility model without departing from the spirit and scope of this utility model shall fall within the protection scope of this utility model.

Claims

1. A powder spheroidizing device, comprising a powder feeding gun, a spheroidizing tower, a collecting device, and an induced draft fan, wherein the powder feeding gun is disposed at the top of the spheroidizing tower, the lower outlet of the spheroidizing tower is connected to the collecting device via a pipe, and the fan is disposed at the end outlet of the collecting device, characterized in that: The powder delivery gun includes a powder inlet pipe, a cold air pipe, a water inlet pipe, a water outlet pipe, and a hot air pipe arranged concentrically from the inside to the outside. Several hot air inlets are arranged along the tangential direction of the inner wall of the hot air pipe, and the hot air forms a vortex inside the hot air pipe.

2. The powder spheroidizing equipment according to claim 1, characterized in that: The hot air inlet is provided with 2-8 inlets; the hot air pipe is provided with a cyclone guide plate.

3. The powder spheroidizing equipment according to claim 1, characterized in that: The spheroidizing tower is equipped with a dispersing rod, which is vertically adjustable via a thread on a mounting bracket inside the spheroidizing tower. The dispersing rod is located directly below the powder feeding gun inlet.

4. The powder spheroidizing equipment according to claim 1, characterized in that: The powder feeding gun is installed on the top of the spheroidizing tower via a flange, which has several circumferentially distributed air curtain inlets.

5. The powder spheroidizing equipment according to claim 4, characterized in that: The air curtain inlet is positioned facing or close to the inner wall of the spheroidizing tower.

6. The powder spheroidizing equipment according to claim 1, characterized in that: The lower end of the spheroidizing tower is located in a water-cooled jacket, and cooling water flows through the water-cooled jacket.

7. The powder spheroidizing equipment according to claim 1, characterized in that: The collection device includes a cyclone collector and a bag filter dust collector. The cyclone collector is connected to the lower outlet of the spheroidizing tower through a pipe, and the cyclone collector is connected to the bag filter dust collector through a pipe. The tail end of the bag filter dust collector is connected to an induced draft fan through a pipe.

8. The powder spheroidizing equipment according to claim 7, characterized in that: The lower end of the cyclone collecting device is equipped with a second dust collector, the lower end of the bag filter dust collecting device is equipped with a third dust collector, and the lower end of the spheroidizing tower is equipped with a first dust collector.

9. The powder spheroidizing equipment according to claim 1, characterized in that: The hot air duct is connected to the heating device via a pipe. The heating device includes an electric heater, a hot air blower, and a filter. The hot air blower is installed on the duct, the electric heater is installed at the end of the hot air blower away from the powder delivery gun, and the filter is installed between the electric heater and the hot air blower.

10. The powder spheroidizing equipment according to any one of claims 1-9, characterized in that: The spheroidizing tower is mounted and fixed on the frame by means of lugs. The frame is equipped with a bracket for mounting and fixing the powder feeding gun.

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