Spheroidizing device

Abstract

The invention provides a spheroidizing device, and relates to the technical field of machining equipment. The spheroidizing device comprises a scraper, a material barrel, a driving assembly and an impeller assembly. The scraper and the impeller assembly are arranged in the material barrel; the scraper is fixed on the impeller assembly; the scraper is arranged close to the inner wall surface of the charging basket; the driving assembly is used for driving the impeller assembly and the scraper in the material barrel to rotate, and the scraper scrapes powder attached to the inner wall face in the rotating process. According to the spheroidizing device, the scraper is arranged in the spheroidizing device, is fixed to the impeller assembly and is arranged close to the inner wall face of the material barrel, so that the powder attached to the inner wall face can be scraped off through the scraper in the working process of the spheroidizing device, and the spheroidizing effect is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of processing equipment, and particularly relates to a spheroidizing device. BACKGROUND

[0002] Graphite is a common negative active material in lithium ion batteries. Before being used as a negative active material of a lithium ion battery, graphite particles usually need to be spheroidized by a spheroidizing device to improve the performance of the graphite negative material. The spheroidizing device mainly comprises a barrel and a stirrer rotatably installed in the barrel. During spheroidization, graphite powder is poured into the barrel, and the graphite powder is continuously stirred by the stirrer. During the stirring process, the graphite particles are continuously rubbed against the stirrer, the inner wall surface and other graphite particles, and the corner and edge structures on the graphite particles are gradually ground off, thereby forming spherical particles with a relatively regular shape, and the spheroidization is completed.

[0003] However, graphite is easily adsorbed on the inner wall surface of the barrel during spheroidization, resulting in an unsatisfactory spheroidization effect of the graphite. SUMMARY

[0004] The application provides a spheroidizing device for spheroidization of powder, which comprises a scraper, a bucket, a driving assembly and an impeller assembly. The scraper and the impeller assembly are arranged in the bucket, the scraper is fixed on the impeller assembly, and the scraper is arranged close to the inner wall surface of the bucket. The driving assembly is used for driving the impeller assembly and the scraper in the bucket to rotate, so that the scraper scrapes off the powder attached to the inner wall surface during rotation.

[0005] In some embodiments, the scraper has an outer surface facing the inner wall surface, and the outer surface is an arc surface.

[0006] In some embodiments, the spacing between the outer surface and the inner wall surface is 10-30 mm.

[0007] In some embodiments, the impeller assembly comprises a rotating base, a plurality of impellers and a plurality of mounting seats, the plurality of impellers are fixed on the rotating base, and the impellers have a top surface of the wheel facing away from the bottom surface of the bucket. The mounting seats are fixed on the top surface of the wheel, the scraper is fixed on the corresponding mounting seat, and extends along the height direction of the bucket.

[0008] In some embodiments, the orthographic projection of the plurality of mounting seats on the bottom surface is located in the orthographic projection of the plurality of impellers on the bottom surface.

[0009] In some embodiments, the mounting base comprises a mounting surface, the scraper is fixed on the mounting surface, and the rotation shaft of the rotating base is not on the plane where the mounting surface is located.

[0010] In some embodiments, the mounting base comprises a connecting portion and a mounting portion, the connecting portion extends along the length direction of the wheel top surface and is fixed on the wheel top surface, the mounting portion extends along the height direction of the barrel, the surface of the mounting portion comprises the mounting surface, the mounting surface extends along the height direction of the barrel and is connected with the scraper surface.

[0011] In some embodiments, the number of the scrapers and the number of the mounting bases are both plural, the mounting bases are distributed in a ring shape, each of the scrapers is fixed on a corresponding mounting base, and the impeller assembly further comprises a ring-shaped support which is spaced apart from the rotating base, and each mounting portion is fixedly connected with the ring-shaped support at the end away from the connecting portion.

[0012] In some embodiments, the scraper comprises a blade seat and a blade edge which are arranged along the length direction of the scraper, the blade seat is fixedly connected with the mounting base, and one side of the blade seat facing the inner wall surface is an arc surface; and one side of the blade edge facing the inner wall surface is an arc surface.

[0013] In some embodiments, the cross-sectional area of the blade seat is greater than the cross-sectional area of the blade edge. In some embodiments, one side of the blade edge facing the inner wall surface is located inside one side of the blade seat facing the inner wall surface.

[0014] The spheroidizing device provided in the present application comprises a scraper, a barrel, a driving assembly, and an impeller assembly. By arranging the scraper in the spheroidizing device and fixing the scraper on the impeller assembly and close to the inner wall surface of the barrel, the spheroidizing device can scrape off the powder attached to the inner wall surface during the working process, thereby improving the spheroidizing effect. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the solutions in the present application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0016] Figure 1 The structural schematic diagram of an embodiment of the spheroidizing device provided in the present application; Figure 2 The structural schematic diagram of an embodiment of the spheroidizing device provided in the present application; Figure 1 The structural schematic diagram of an embodiment of the spheroidizing device provided in the present application; Figure 3 The structural schematic diagram of an embodiment of the spheroidizing device provided in the present application;Figure 1 Schematic view of the scraper and the barrel of the spheroidizing device; Figure 4 For Figure 3 Schematic view of the local enlargement at A; Figure 5 Schematic view of the structure of an embodiment of the scraper provided in the present application; Figure 6 Schematic view of the structure of an embodiment of the connection between the blade seat and the blade of the scraper provided in the present application. BRIEF DESCRIPTION OF DRAWINGS 10. Spheroidizing device; 100. Scraper; 110. Blade seat; 111. First surface; 112. Second surface; 113. Threaded hole; 120. Blade; 121. Third surface; 200. Barrel; 210. Inner wall surface; 300. Impeller assembly; 310. Rotating base; 320. Impeller; 321. Top surface of wheel; 330. Annular support; 340. Mounting seat; 341. Connecting part; 342. Mounting part; 3421. Mounting surface. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the orientation words such as "upper" and "lower" generally refer to the upper and lower in the actual use or working state of the device, and specifically refer to the direction of the drawing surface in the drawings; and "inner" and "outer" refer to the outline of the device.

[0019] Graphite is a common negative active material in lithium ion batteries. Before being used as a negative active material in lithium ion batteries, graphite particles usually need to be spheroidized by a spheroidizing device to improve the performance of the graphite negative electrode material. The spheroidizing device mainly includes a barrel and an agitator rotatingly installed in the barrel. During spheroidization, graphite powder is poured into the barrel, and the graphite powder is continuously stirred by the agitator. During stirring, the graphite particles continuously rub against the agitator, the inner wall surface 210, and other graphite particles. The corner and edge structures on the graphite particles are gradually ground off, and spherical particles with regular shapes are formed, completing spheroidization.

[0020] However, during the spheroidization process, graphite tends to adhere to the inner wall surface 210 of the cylinder, resulting in an unsatisfactory spheroidization effect.

[0021] In view of this, please refer to Figures 1 to 6 This application provides a spheroidizing device 10. By providing a scraper 100 in the spheroidizing device 10 and fixing the scraper 100 on the impeller assembly 300 and setting it close to the inner wall surface 210 of the material barrel 200, the spheroidizing device 10 can scrape off the powder adhering to the inner wall surface 210 by the scraper 100 during operation, thereby improving the spheroidizing effect.

[0022] Specifically, the spheroidizing device 10 includes a scraper 100, a material container 200, a drive assembly, and an impeller assembly 300. The material container 200 is used to hold the powder to be spheroidized and provides installation space. The powder to be spheroidized includes, but is not limited to, microcrystalline graphite. The impeller assembly 300 is disposed within the material container 200. During operation, the impeller assembly 300 is mainly used for stirring, dispersing, and spheroidizing the powder. For example, the scraper 100 is fixed to the impeller assembly 300, and under the action of the drive assembly, the impeller assembly 300 and the scraper 100 fixed thereto rotate synchronously. The drive assembly is used to drive the impeller assembly 300 to rotate. It should be noted that the drive assembly can directly drive the impeller assembly 300 to rotate, or it can drive the impeller assembly 300 to rotate through an intermediate component; this is not limited here. The drive assembly can be disposed inside or outside the material container 200; this is not limited here. For example, the drive assembly includes a drive motor and a drive shaft that is driven and connected to the drive electrode. The drive motor is located outside the material tank 200, and the drive shaft extends through the bottom wall of the material tank 200 into the material tank 200 and is driven and connected to the impeller assembly 300 inside the material tank 200.

[0023] In the spheroidizing device 10 provided in this application embodiment, without changing the main structure of the existing spheroidizing device 10 such as the material barrel 200, drive assembly, and impeller assembly 300, only a scraper 100 is added. The scraper 100 is fixed on the impeller assembly 300 and set close to the inner wall surface 210 of the material barrel 200. This allows the spheroidizing device 10 to scrape off the powder adhering to the inner wall surface 210 during operation, thereby improving the spheroidizing effect and reducing the manufacturing cost of the equipment.

[0024] In some embodiments, the scraper 100 has an outer surface facing the inner wall surface 210, and the outer surface is arc-shaped. When the powder passes between the arc surface on the scraper 100 and the inner wall surface 210, it is squeezed and its sharp corners are worn away, achieving spheroidization. That is, the scraper 100 also participates in the spheroidization of graphite particles, thereby improving spheroidization efficiency, reducing spheroidization processing time, and lowering manufacturing costs.

[0025] In some embodiments, the distance between the outer surface of the scraper 100 and the inner wall surface 210 is 10mm to 30mm. For example, the distance between the outer surface (e.g. the second surface 112 or the third surface 121) of the scraper 100 and the inner wall surface 210 is 10mm, 15mm, 20mm, 25mm, 30mm or any distance within the range of any two of the above values. In this way, the scraper 100 and the inner wall surface 210 can have sufficient distance to avoid collision between the scraper 100 and the inner wall surface 210 during high-speed rotation of the scraper 100, and at the same time, the scraper 100 and the inner wall surface 210 can have appropriate distance to improve the spheroidization effect of the powder (e.g. graphite).

[0026] In some embodiments, the scraper 100 includes a blade seat 110 and a blade edge 120 arranged along the length direction of the scraper 100, or arranged along the central axis direction of the scraper 100. The blade seat 110 can also be understood as a connecting part 341 of the scraper 100, which is mainly used for connection and fixation of the scraper 100, and also has a certain effect on dispersion and spheroidization of the powder; the length of the blade edge 120 is greater than that of the blade seat 110, which is mainly used for scraping the powder attached to the inner wall surface 210.

[0027] For example, the blade seat 110 includes a first surface 111 and a second surface 112 connected to each other, the first surface 111 is used to connect with the impeller assembly 300, and the second surface 112 is an arc surface arranged towards the inner wall surface 210. It can be understood that the second surface 112 forms at least part of the outer surface of the scraper 100. For example, the first surface 111 and the second surface 112 are arranged opposite to each other, which is beneficial to avoid interference of the impeller assembly 300 during operation, and further improves the spheroidization effect of the blade seat 110.

[0028] For example, the first surface 111 and the second surface 112 are arranged close to the inner wall surface 210, which is used to scrape the powder attached to the inner wall surface 210, and is beneficial to further improve the effect of the scraper 100 in scraping the powder attached to the inner wall surface 210.

[0029] Exemplarily, the cross-sectional area of the blade seat 110 is larger than the cross-sectional area of the blade edge 120, which can also be understood as the blade seat 110 is thicker at the end and the blade edge 120 is thinner at the end. In this way, the scraper 100 can have a smaller volume and greater rigidity. Further, the blade seat 110 and the blade edge 120 are both provided with curved surfaces, for example, the second surface 112 of the blade seat 110 is a curved surface, and the third surface 121 of the blade edge 120 is a curved surface, and the second surface 112 and the third surface 121 form the outer surface of the scraper 100 facing the inner wall surface 210. Compared with the prior art of providing sharp edges on the scraper 100, this embodiment is beneficial to avoid over-pulverization of the powder during spheroidization, which leads to unsatisfactory spheroidization effect. In addition, the curved surfaces on the blade seat 110 and the blade edge 120 in the present application are provided on the same side, and when the curved surfaces on the blade seat 110 and the blade edge 120 are spaced apart from the inner wall surface 210 at a small distance, the powder passing between the curved surfaces on the blade seat 110 and the blade edge 120 and the inner wall surface 210 will be squeezed and ground off the sharp corners, realizing spheroidization, that is, the scraper 100 also participates in the spheroidization of the graphite particles, thereby improving the spheroidization efficiency, reducing the spheroidization processing time, and reducing the manufacturing cost.

[0030] Further, the third surface 121 is provided inside the second surface 112. In this way, the distance between the third surface 121 and the inner wall surface 210 is greater than the distance between the second surface 112 and the inner wall surface 210, which is beneficial to improve or avoid the risk that the blade edge 120 shakes more than the blade seat 110 during high-speed rotation of the scraper 100, causing the blade edge 120 to easily collide with the inner wall surface 210, and is beneficial to improve the stability of the equipment with the scraper 100.

[0031] Exemplarily, the distance between the second surface 112 and the inner wall surface 210 is 10mm to 30mm. Exemplarily, the distance between the second surface 112 and the inner wall surface 210 is 10mm, 15mm, 20mm, 25mm, 30mm and the range value between any two of the above values. In this way, the second surface 112 and the inner wall surface 210 have sufficient spacing to avoid collision between the second surface 112 and the inner wall surface 210 during high-speed rotation of the scraper 100, and at the same time, the second surface 112 and the inner wall surface 210 form a suitable spacing to improve the spheroidization effect of the powder (such as graphite).

[0032] Exemplarily, the distance between the third surface 121 and the inner wall surface 210 is 10mm to 30mm. Exemplarily, the distance between the third surface 121 and the inner wall surface 210 is 10mm, 15mm, 20mm, 25mm, 30mm and the range value between any two of the above values. In this way, the third surface 121 and the inner wall surface 210 can have sufficient spacing to avoid collision between the third surface 121 and the inner wall surface 210 during high-speed rotation of the scraper 100, and at the same time, the third surface 121 and the inner wall surface 210 can form a suitable spacing to improve the spheroidization effect of the powder (e.g. graphite).

[0033] In some embodiments of the present application, the impeller assembly 300 comprises a rotating base 310, a plurality of impellers 320 and a plurality of mounting seats 340, and the plurality of impellers 320 are fixed on the rotating base 310. The impeller 320 has a wheel top surface 321 facing away from the barrel bottom surface of the barrel 200. The mounting seat 340 is fixed on the wheel top surface 321, the scraper 100 is fixed on the corresponding mounting seat 340, and extends along the height direction of the barrel 200. In this way, the mounting seat 340 can be fixed without additional installation support, which is beneficial to improve the compactness of the spheroidization device 10. In addition, the scraper 100 extends along the height direction of the barrel 200, and in the case that the length of the scraper 100 is fixed, the scraper 100 can cover a larger area in the movement track during rotation, which can further improve the effect of scraping the powder attached to the inner wall surface 210.

[0034] Exemplarily, the rotating base 310 is a rotating disc, and the rotating disc is provided with a rotating disc hole at a position close to the middle. The rotating disc is drivingly connected to the driving assembly through the rotating disc hole.

[0035] Exemplarily, the number of the impellers 320, the mounting seats 340 and the scrapers 100 is multiple. The plurality of impellers 320 are arranged at intervals and arranged in a substantially circular ring. Each mounting seat 340 is fixed on the corresponding impeller 320. It should be noted that the number of the impellers 320 and the number of the mounting seats 340 can be the same or different, which is not limited herein. For example, the number of the impellers 320 is 8, and the number of the mounting seats 340 can also be 8, and each mounting seat 340 is fixed on the corresponding impeller 320. For another example, the number of the impellers 320 is 8, and the number of the mounting seats 340 can also be 4, so that only one of the two adjacent impellers 320 is provided with the mounting seat 340.

[0036] In some embodiments, the projections of the plurality of mounting seats 340 on the barrel bottom surface are located within the projections of the plurality of impellers 320 on the barrel bottom surface. For example, the plurality of mounting seats 340 are arranged in a substantially annular manner, and the plurality of impellers 320 are arranged in a substantially annular manner, and the circumscribed circle of all the mounting seats 340 is located within the circumscribed circle of all the impellers 320. It should be noted that the circumscribed circle of all the mounting seats 340 refers to the smallest circle that encloses all the mounting seats 340. In this way, the radial dimension of the impeller assembly 300 can be kept unchanged while increasing the number of mounting seats 340, thereby avoiding the problem that the radial dimension of the impeller assembly 300 becomes larger after increasing the number of mounting seats 340, which leads to the mismatch with the barrel 200.

[0037] Further, the mounting seat 340 comprises a mounting surface 3421, the scraper 100 is fixed on the mounting surface 3421, and the rotation axis of the rotating base 310 is not on the plane where the mounting surface 3421 is located. Further, the mounting surface 3421 is not perpendicular to the radial direction of the rotating base 310, which is conducive to avoiding the radial dimension of the impeller assembly 300 from becoming larger after the mounting seat 340 and the scraper 100 are installed, thereby avoiding the problem that the volume of the impeller assembly 300 in the radial direction becomes larger, and further avoiding the need for a larger diameter cylinder, thereby avoiding the problem that the entire spheroidization device needs to occupy a larger installation space, and controlling the production cost.

[0038] Specifically, the mounting seat 340 comprises a connecting portion 341 and a mounting portion 342, the connecting portion 341 extends along the length direction of the wheel top surface 321 and is fixed on the wheel top surface 321, and the mounting portion 342 extends along the height direction of the barrel 200, and the surface of the mounting portion 342 comprises the mounting surface 3421. For example, the wheel top surface 321 is a horizontal plane, the connecting portion 341 and the mounting portion 342 are both substantially rod-shaped structures, the cross section of the connecting portion 341 and the mounting portion 342 is substantially rectangular, and the connecting portion 341 and the mounting portion 342 are perpendicular to each other, and the connecting portion 341 and the mounting portion 342 as a whole are in the shape of the letter “L”. It can be understood that the impeller 320 of the impeller assembly 300 is originally cut obliquely with respect to the radius of the cylinder, so as to push the to-be-spheroidized powder (for example, graphite powder) and push the to-be-spheroidized powder upward, so as to make the to-be-spheroidized powder flow up and down. In this embodiment, the connecting portion 341 is directly fixed on the top of the stirring blade, so that it is not necessary to design a mounting base for the mounting seat 340, and it can be ensured that the plane where the side surface of the mounting portion 342 is located does not pass through the rotation axis of the rotating base 310, and the mounting surface 3421 is not perpendicular to the radial direction of the rotating base 310.

[0039] In some embodiments, the number of the impellers 320, the mounting seats 340 and the scrapers 100 are multiple, the mounting seats 340 are annularly distributed, and each of the scrapers 100 is fixed on the corresponding mounting seat 340; the impeller assembly 300 further comprises an annular support 330, which is spaced apart from the rotating base 310, and each of the mounting portions 342 is fixedly connected with the annular support 330 at an end away from the connecting portion 341. In this way, the structural strength and stability of the spheroidizing device 10 can be improved.

[0040] Specifically, the rotating base 310 is rotatably arranged in the barrel 200, the multiple impellers 320 are fixed on the rotating base 310 and are spaced apart along the circumference of the rotating base 310. The annular support 330 is arranged above the rotating base 310 and is opposite to the rotating base 310. The multiple mounting seats 340 are arranged one-to-one with the multiple impellers 320, each of the mounting seats 340 is fixedly connected with the annular support 330 and the corresponding impeller 320, and the multiple mounting seats 340 collectively support the annular support 330; the blade seat 110 of each of the scrapers 100 is fixed on the corresponding mounting seat 340, the blade edge 120 of each of the scrapers 100 extends toward the side where the annular support 330 is located, and the extension direction of the scraper 100 is substantially parallel to the rotation axis of the rotating base 310, and the multiple scrapers 100 are substantially annularly arranged. In this way, the spheroidizing effect can be further improved, and the spheroidizing device 10 has high structural strength and stability.

[0041] Exemplarily, a part of structure can be cut off along the axial direction of the rod-shaped metal piece at one end thereof to form a structure with a narrow end and a thick end. For example, the narrow end is a long strip part with a fan-shaped cross-section, and the long strip part forms the blade edge 120. The part not cut off at the other end is the thick end, which forms the blade seat 110. It should be noted that the above is only one specific example in the present application, and should not be understood as a specific limitation on the structure of the blade edge 120 and the blade seat 110 in the present application.

[0042] Exemplarily, the shape of the first surface 111 is adapted to the shape of the surface to be connected on the external device. Exemplarily, the surface to be connected on the external device is a plane, and correspondingly, the first surface 111 is also a plane. For example, the surface to be connected on the external device is a curved surface, and correspondingly, the first surface 111 is also a curved surface, so as to facilitate the connection between the first surface 111 and the surface to be connected on the external device, thereby increasing the connection area of the tool seat 110 and the external device and improving the force at the connection between the tool seat 110 and the external device. Exemplarily, the surface to be connected on the external device is a plane, the first surface 111 is a plane, and the second surface 112 of the tool seat 110 is provided with a threaded hole 113. The tool seat 110 is fixed on the surface to be connected on the external device by a fastener (for example, a threaded part) matched with the threaded hole 113 on the tool seat 110, so as to lock the first surface 111 and the surface to be connected on the external device against each other, and the second surface 112 is arranged close to the inner wall surface 210.

[0043] The blade 120 comprises a third surface 121 arranged on the same side as the second surface 112 and arranged towards the inner wall surface 210, and the third surface 121 is an arc surface. In the direction away from the tool seat 110, the third surface 121 is arranged on the inner side of the second surface 112. It should be noted that the inner side of the second surface 112 can also be understood as the side of the second surface 112 with a central axis, and can also be understood as the side of the second surface 112 away from the inner wall surface 210.

[0044] The application further provides a scraper 100, which comprises a tool seat 110 and a blade 120 arranged along the central axis direction thereof. The cross-sectional area of the tool seat 110 is greater than the cross-sectional area of the blade 120. The tool seat 110 comprises a first surface 111 and a second surface 112 connected to each other. The first surface 111 is used to connect with an external device. The second surface 112 is an arc surface, and the second surface 112 is arranged towards the barrel wall. The blade 120 is fixed on the tool seat 110. The blade 120 comprises a third surface 121 arranged on the same side as the second surface 112 and arranged towards the barrel wall. The third surface 121 is an arc surface. In the direction away from the tool seat 110, the third surface 121 is arranged on the inner side of the second surface 112. It should be noted that the cross-sectional area of the tool seat 110 refers to the area enclosed by the intersection line between the plane perpendicular to the central axis and the outer contour of the tool seat 110. Correspondingly, the cross-sectional area of the blade 120 refers to the area enclosed by the intersection line between the plane perpendicular to the central axis and the outer contour of the blade 120.

[0045] The scraper 100 provided in the embodiments of the present application comprises a blade seat 110 and a blade edge 120, and the cross-sectional area of the blade seat 110 is greater than that of the blade edge 120, so that the scraper 100 has a small volume and a large rigidity. Meanwhile, the blade seat 110 and the blade edge 120 have arc surfaces, which are beneficial to avoid over-pulverization of the powder in the spheroidization process, resulting in an unsatisfactory spheroidization effect, compared with the prior art in which sharp edges are arranged on the scraper 100. In addition, the arc surfaces on the blade seat 110 and the blade edge 120 are arranged on the same side, and when the arc surfaces on the blade seat 110 and the blade edge 120 are arranged at a small distance from the inner wall surface 210, the powder passing between the arc surfaces on the blade seat 110 and the blade edge 120 and the inner wall surface 210 will be extruded and ground to remove sharp corners, realizing spheroidization, that is, the scraper 100 also participates in the spheroidization of graphite particles, thereby improving the spheroidization efficiency, reducing the spheroidization processing time, and reducing the manufacturing cost. Meanwhile, the third surface 121 is arranged on the inner side of the second surface 112, so that the distance between the third surface 121 and the inner side of the inner wall surface 210 is greater than that between the second surface 112 and the inner side of the inner wall surface 210, thereby being beneficial to improve or avoid the risk that the shaking amplitude of the blade edge 120 is greater than that of the blade seat 110, resulting in that the blade edge 120 is easily collided with the inner wall surface 210, and being beneficial to improve the stability of the equipment with the scraper 100.

[0046] In some embodiments of the present application, the second surface 112 and the third surface 121 are arranged on the same side of the central axis. In this way, it is beneficial to make the structure of the scraper 100 in the present application simpler, the structure of the scraper 100 more compact, and the manufacturing cost lower. Meanwhile, the arrangement of the second surface 112 and the third surface 121 on the same side of the central axis is also beneficial to increase the area of the connection between the blade seat 110 and the blade edge 120, and is beneficial to the overall rigidity of the scraper 100.

[0047] Exemplarily, the second surface 112 and the third surface 121 are parallel to each other, which can also be understood as that the third surface 121 is translated inwardly by a preset distance at equal distances relative to the second surface 112, for example, the second surface 112 and the third surface 121 are two cylindrical surfaces of a concentric cylinder. Of course, in other embodiments of the present application, the second surface 112 and the third surface 121 can also not be parallel to each other, for example, the third surface is rotated inwardly by a small angle relative to the second surface, which is not limited herein.

[0048] In some embodiments of the present application, the connection between the second surface 112 and the adjacent surface is smoothly transitioned. In this way, it is beneficial to further reduce the number of sharp edges on the blade seat 110, avoid over-pulverization of the powder in the spheroidization process, and result in an unsatisfactory spheroidization effect.

[0049] In some embodiments, the third surface 121 is smoothly connected with the adjacent surface. In this way, the number of sharp edges on the blade 120 is further reduced, which avoids over-pulverization of the powder during spheroidization, and thus improves the spheroidization effect.

[0050] In some embodiments, the blade 120 is integrally formed on the blade holder 110. In this way, the overall structural strength of the scraper 100 is further improved.

[0051] In some embodiments, the scraper 100 is a metal scraper 100, which can also be understood as a metal piece. For example, the scraper 100 is an integrally formed metal piece, which further improves the overall rigidity of the scraper 100 and is easy to process. For example, the scraper 100 can be integrally stamped or cut, which is not limited herein.

[0052] In some embodiments, the blade 120 includes a plurality of sub-parts connected with each other, and the plurality of sub-parts are arranged along the central axis direction; each sub-part is provided with a sub-arc surface, and the plurality of sub-arc surfaces form the third surface 121. In adjacent two sub-arc surfaces, the sub-arc surface away from the blade holder 110 is located on the inner side of the sub-arc surface close to the blade holder 110. It can be understood that since the scraper 100 is fixed by the blade holder 110, during high-speed rotation of the scraper 100, the greater the distance of the blade 120 from the blade holder 110, the greater the shaking amplitude. In this embodiment, the distance between the sub-arc surface on the sub-part farther away from the blade holder 110 and the inner wall is greater, which reduces the risk of collision between the blade 120 and the inner wall 210, and improves the stability of the equipment with the scraper 100.

[0053] For example, the blade 120 includes a plurality of sub-parts connected with each other, and the plurality of sub-parts are arranged in steps along the central axis direction; each sub-part is provided with a sub-arc surface, and the sub-arc surface on the sub-part away from the blade holder 110 is located on the inner side of the sub-arc surface on the sub-part close to the blade holder 110.

[0054] For ease of understanding, the following will be described by taking a plurality of sub-parts including a first sub-part and a second sub-part arranged adjacent to each other as an example, which can also be understood as the blade 120 including two sub-parts. Along the central axis direction, the blade 120 includes a first sub-part and a second sub-part connected with each other, and the first sub-part is arranged between the second sub-part and the blade holder 110. The first sub-part includes a first sub-arc surface, the second sub-part includes a second sub-arc surface, the third surface 121 includes the first sub-arc surface and the second sub-arc surface, and the first sub-arc surface and the second sub-arc surface are both arranged on the inner side of the second surface 112. The second sub-arc surface is arranged on the inner side of the first sub-arc surface, which can also be understood as the second sub-arc surface is arranged on the side of the first sub-arc surface away from the inner wall.

[0055] In some embodiments, the blade 120 comprises 2 to 4 sub-sections. Exemplarily, the blade 120 comprises 2, or 3, or 4 sub-sections. In this way, it is beneficial to avoid too many sub-sections on the blade 120, which leads to complex structure, increased process difficulty and manufacturing cost.

[0056] In some embodiments, the first surface 111 and the second surface 112 are oppositely arranged. In this way, it is beneficial to improve the installation convenience of the scraper 100, and as far as possible, to increase the area of the second surface 112, which is beneficial to further improve the spheroidization effect of the scraper 100 on the powder.

[0057] In some embodiments, the distance between the third surface 121 and the second surface 112 gradually increases in the direction away from the blade seat 110. Exemplarily, the third surface 121 is generally conical. In this embodiment, the distance between the arc surface farther away from the blade seat 110 and the inner wall is larger, which is beneficial to reduce the risk of collision between the blade 120 and the inner wall surface 210, and is beneficial to improve the stability of the equipment with the scraper 100.

[0058] In some embodiments, the intersection between the cross section of the blade seat 110 and the second surface 112 is a first arc line, the intersection between the cross section of the blade 120 and the third surface 121 is a second arc line, the orthographic projection of the second arc line is located on the inner side of the orthographic projection of the first arc line, and one end of the orthographic projection of the second arc line coincides with one end of the orthographic projection of the first arc line. In this embodiment, the distance between the arc surface farther away from the blade seat 110 and the inner wall is larger, which is beneficial to reduce the risk of collision between the blade 120 and the inner wall surface 210, and is beneficial to improve the stability of the equipment with the scraper 100.

[0059] The above describes the embodiments of the present application in detail, and the specific examples are applied to the principle and implementation mode of the present application. The above embodiment is only used to help understand the method and core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed, and the above description should not be understood as the limitation of the present application.

Claims

1. A spheroidizing device (10) for spheroidizing powder, characterized in that, The spheroidizing device (10) includes a scraper (100), a material bucket (200), a drive assembly, and an impeller assembly (300). The scraper (100) and the impeller assembly (300) are disposed inside the material bucket (200); the scraper (100) is fixed on the impeller assembly (300); the scraper (100) is disposed close to the inner wall surface (210) of the material bucket (200); The drive assembly is used to drive the impeller assembly (300) and the scraper (100) inside the hopper (200) to rotate, so that the scraper (100) scrapes off the powder adhering to the inner wall surface (210) during rotation.

2. The spheroidizing device (10) as described in claim 1, characterized in that, The scraper (100) has an outer surface facing the inner wall surface (210), and the outer surface is an arc surface.

3. The spheroidizing device (10) as described in claim 2, characterized in that, The distance between the outer surface and the inner wall surface (210) is 10 mm to 30 mm.

4. The spheroidizing device (10) according to any one of claims 1 to 3, characterized in that, The impeller assembly (300) includes a rotating base (310), a plurality of impellers (320) and a plurality of mounting bases (340), wherein the plurality of impellers (320) are fixed on the rotating base (310), and the impellers (320) have a top surface (321) facing away from the bottom surface of the hopper (200). The mounting base (340) is fixed on the top surface (321) of the wheel, and the scraper (100) is fixed on the corresponding mounting base (340) and extends along the height direction of the material bucket (200).

5. The spheroidizing device (10) as described in claim 4, characterized in that, The orthographic projection of a plurality of said mounting bases (340) onto the bottom surface of the barrel lies within the orthographic projection of a plurality of said impellers (320) onto the bottom surface of the barrel.

6. The spheroidizing device (10) as described in claim 5, characterized in that, The mounting base (340) includes a mounting surface (3421), the scraper (100) is fixed on the mounting surface (3421), and the rotating shaft of the rotating base (310) is not on the plane where the mounting surface (3421) is located.

7. The spheroidizing device (10) as described in claim 6, characterized in that, The mounting base (340) includes a connecting part (341) and a mounting part (342). The connecting part (341) extends along the length direction of the wheel top surface (321) and is fixed on the wheel top surface (321). The mounting part (342) extends along the height direction of the material bucket (200). The surface of the mounting part (342) includes the mounting surface (3421). The mounting surface (3421) extends along the height direction of the material bucket (200) and is connected to the scraper (100) surface-to-surface.

8. The spheroidizing device (10) as described in claim 7, characterized in that, The number of scrapers (100) and mounting bases (340) is multiple, and the multiple mounting bases (340) are arranged in a ring. Each scraper (100) is fixed on the corresponding mounting base (340). The impeller assembly (300) also includes an annular bracket (330). The annular bracket (330) is spaced apart from the rotating base (310). The end of each mounting part (342) opposite to the connecting part (341) is fixedly connected to the annular bracket (330).

9. The spheroidizing device (10) as described in claim 4, characterized in that, The scraper (100) includes a blade holder (110) and a blade (120) arranged along its length. The blade holder (110) is fixedly connected to the mounting base (340). The side of the blade holder (110) facing the inner wall surface (210) is an arc surface. The side of the blade (120) facing the inner wall surface (210) is an arc surface.

10. The spheroidizing device (10) as claimed in claim 9, characterized in that, The cross-sectional area of ​​the blade holder (110) is greater than the cross-sectional area of ​​the blade (120); And / or, the side of the blade (120) facing the inner wall surface (210) is located inside the side of the blade holder (110) facing the inner wall surface (210).

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