Metal powder production equipment

Abstract

The present invention relates to metal powder production equipment, which belongs to the field of metal powder production and includes an inner cylinder and an outer cylinder. The inner cylinder is disposed within the outer cylinder and is capable of relative rotation with the outer cylinder, forming an outer grinding chamber between the inner cylinder and the outer cylinder. Two partitions are disposed within the inner cylinder, dividing the inner cylinder into a primary grinding chamber and two secondary grinding chambers, with the two secondary grinding chambers disposed on either side of the primary grinding chamber. First sieve holes are provided on the two partitions, connecting the primary grinding chamber to the two secondary grinding chambers. Second sieve holes are provided on the side walls of the two secondary grinding chambers, connecting both secondary grinding chambers to the outer grinding chamber. The aperture of the first sieve hole is larger than the aperture of the second sieve hole. Grinding media are disposed in the primary grinding chamber, the secondary grinding chamber, and the outer grinding chamber, with the diameters of the media in the primary grinding chamber, the secondary grinding chamber, and the outer grinding chamber decreasing in size. The present invention improves the effect and efficiency of powder preparation and effectively solves the problems existing in the prior art.

Description

Technical Field

[0001] The present invention relates to the field of metal powder production, and in particular to metal powder production equipment. Background Art

[0002] Metal powder is usually an important raw material for powder metallurgy. There are many methods for preparing metal powder, mainly including chemical methods and physical methods. Among them, physical methods include high-energy ball milling, and ball mills are used in high-energy ball milling.

[0003] A ball mill generally places grinding media inside a ball mill barrel, and then crushes and grinds the material placed inside the ball mill barrel. Existing ball mills are generally used in two ways. One way is to select grinding media of different sizes when grinding materials of different sizes. For example, if a material needs to be ground into larger particles, a larger grinding media can be selected, while if a material needs to be ground into smaller particles, a smaller grinding media can be selected. However, this method has the following problems: large-sized grinding media have a better crushing effect, but cannot perform fine grinding, while smaller-sized grinding media can perform finer grinding, but the crushing effect is not good. In this way, when it is necessary to grind a material into a smaller size, but the size of the initial material before grinding is large, it is necessary to replace grinding media of different sizes or even different equipment and perform multiple, multi-level crushing and grinding to achieve this, which greatly reduces production efficiency. Another approach involves placing grinding media of varying sizes directly within the same ball mill, then performing both crushing and fine grinding processes on the material within the mill. Larger grinding media perform the crushing function, while smaller grinding media perform the fine grinding function. However, since these grinding media are all operating within the same ball mill, the ratio of these media sizes can affect the final grinding performance. Excessive use of large grinding media results in better crushing but poor fine grinding, impacting the final yield. Excessive use of small grinding media, while providing a better fine grinding effect, results in poor crushing, significantly impacting production efficiency. Therefore, in some cases, it is necessary to strictly limit the ratio of different grinding media sizes based on the material to achieve a balanced balance between crushing and fine grinding. However, since these grinding media sizes inevitably interfere with each other when performing their respective functions, this can affect their respective functions, preventing each size from fully functioning, reducing production efficiency and impacting the grinding performance.

[0004] Patent application with publication number CN114309626A discloses a high-efficiency ball mill for powder metallurgy. The ball mill still uses a method of unifying the materials in a common ball mill barrel and using steel balls of different sizes as the medium for production. It does not solve the problems existing in the prior art.

[0005] Therefore, it is necessary to solve the above problems through a metal powder production equipment. Summary of the Invention

[0006] Technical issues to be solved:

[0007] The object of the present invention is to provide a metal powder production device to solve the problems of low production efficiency and unsatisfactory grinding effect in the prior art.

[0008] Technical solution:

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] The present invention provides a metal powder production device, comprising an inner cylinder and an outer cylinder. The inner cylinder is arranged in the outer cylinder, and the inner cylinder and the outer cylinder are able to rotate relative to each other, forming an outer grinding chamber between the inner cylinder and the outer cylinder. Two partitions are arranged in the inner cylinder to separate the inner cylinder into a primary grinding chamber and two secondary grinding chambers, and the two secondary grinding chambers are arranged on both sides of the primary grinding chamber. A first sieve hole is provided on each of the two partitions, so that the primary grinding chamber is connected to the two secondary grinding chambers. A second sieve hole is provided on the side walls of the two secondary grinding chambers, so that the two secondary grinding chambers are connected to the outer grinding chamber. The aperture of the first sieve hole is larger than the aperture of the second sieve hole. Grinding media are provided in the primary grinding chamber, the secondary grinding chamber, and the outer grinding chamber, and the diameters of the grinding media in the primary grinding chamber, the secondary grinding chamber, and the outer grinding chamber decrease in sequence.

[0011] Preferably, the radial cross-section of the outer cylinder is circular, the radial cross-section of the inner cylinder is elliptical, and the inner cylinder and the outer cylinder are coaxial. A grinding gap is formed between the long axis surface of the inner cylinder corresponding to the long axis and the inner wall of the outer cylinder.

[0012] Preferably, the long axis surface is provided with an extended arc surface, and a grinding gap is formed between the extended arc surface and the inner wall of the outer cylinder.

[0013] Preferably, the device further comprises a base. Two brackets are fixedly mounted on the base. Both ends of the outer cylinder are mounted on the two brackets. A driving assembly is mounted on the brackets for driving the inner cylinder and the outer cylinder to rotate relative to each other.

[0014] Preferably, a hollow tube is rotatably provided on each of the two brackets, and the hollow tube is coaxially connected to the inner cylinder and communicated with the primary grinding chamber.

[0015] Preferably, the drive assembly includes a gear set and a motor. The gear set is located at one end of the outer tube and includes a first gear, a second gear, and a ring gear. The first gear is sleeved on and fixedly connected to the hollow tube. The second gear meshes with the first gear. The ring gear is sleeved outside the first and second gears and meshes with the second gear. The ring gear is fixedly connected to the outer tube. The motor is used to drive the first gear to rotate.

[0016] Preferably, a driven pulley is fixedly sleeved on the hollow tube at the other end of the outer cylinder, and the driven pulley is connected to the driving pulley via a transmission belt. The driving pulley is connected to the motor.

[0017] Preferably, a first anti-return spring is provided on the partition and corresponds to the first sieve hole. The first anti-return spring is provided on one side of the secondary grinding chamber and extends toward the first sieve hole to block the first sieve hole.

[0018] Preferably, the outer side wall of the inner cylinder is provided with a second anti-return spring piece, which is provided corresponding to the second sieve hole and extends toward the second sieve hole to block the second sieve hole.

[0019] Preferably, the two secondary grinding chambers are arranged symmetrically.

[0020] Beneficial effects:

[0021] The present invention provides a metal powder production apparatus that divides an inner cylinder into three chambers: a primary grinding chamber and two secondary grinding chambers. An outer grinding chamber is also formed between the inner and outer cylinders. The grinding media within each grinding chamber are of the same specifications, effectively avoiding the technical problem of interference between grinding media of different sizes. Furthermore, the grinding media within each grinding chamber are differentiated in specifications, with the diameters of the grinding media in the primary, secondary, and outer grinding chambers decreasing in size, to achieve progressively finer grinding. Specifically, the primary grinding media in the primary grinding chamber are larger than the secondary grinding media in the secondary grinding chamber, which in turn are larger than the outer grinding media in the outer grinding chamber. This allows the metal powder production process to proceed step by step, towards increasingly finer grinding. The primary, secondary, and outer grinding media all independently perform their respective functions, preventing interference between grinding media of different sizes. This increases the contact efficiency between each grinding medium and the correspondingly sized material, thereby improving the efficiency of metal powder production.

[0022] In addition, a grinding gap is provided between the inner cylinder and the outer cylinder of the present invention, and large-scale grinding is achieved through the relative movement of the inner cylinder and the outer cylinder, thereby improving the grinding effect and efficiency.

[0023] In summary, the present invention not only achieves the purpose of step-by-step fine grinding within the same equipment, but also strictly distinguishes grinding media of different sizes so that they do not interfere with each other, thereby improving the effect and efficiency of powder preparation and effectively solving the problems existing in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0025] Figure 2 For the present invention Figure 1 A magnified schematic diagram of point A;

[0026] Figure 3 A schematic diagram of the three-dimensional structure of the present invention from another angle;

[0027] Figure 4 A three-dimensional cross-sectional view showing the matching relationship between the inner cylinder and the outer cylinder;

[0028] Figure 5 It is a half-section schematic diagram of the three-dimensional structure of the present invention;

[0029] Figure 6 For the present invention Figure 5 An enlarged schematic diagram of point B;

[0030] Figure 7 This is a schematic diagram of the end portion of the outer cylinder of the present invention;

[0031] Figure 8 A three-dimensional schematic diagram of a form of the inner cylinder of the present invention;

[0032] Figure 9 A schematic diagram showing the internal arrangement of the inner and outer cylinders;

[0033] Figure 10 A schematic structural diagram of a preferred embodiment of the present invention;

[0034] Figure 11 for Figure 10 Rotate the state diagram by 90 degrees;

[0035] Figure 12 for Figure 10 A simplified schematic diagram of

[0036] Figure 13 for Figure 12 Magnified view of part C;

[0037] Figure 14 Schematic diagram of an optimized structure of the first anti-return spring;

[0038] Figure 15 for Figure 12 Magnified view of part D;

[0039] Figure 16 Schematic diagram of another embodiment of the first anti-return spring piece and the second anti-return spring piece;

[0040] Figure 17 for Figure 16 Schematic diagram of rotation state;

[0041] Figure 18 for Figure 16 Enlarged view of part E;

[0042] Figure 19 for Figure 16 A cross-sectional view of one installation method of the first anti-return spring;

[0043] Figure 20 It is a three-dimensional diagram of the rotating shaft sleeve;

[0044] Figure 21 A schematic diagram of another form of the inner cylinder;

[0045] Figure 22 This is a schematic diagram of another form of the inner cylinder;

[0046] Figure 23 A schematic diagram showing the relationship between the major axis and minor axis of the runway-shaped inner tube.

[0047] In the figure: 1, base; 2, support leg; 3, bracket; 4, hollow tube; 5, inner cylinder; 501, primary grinding chamber; 502, secondary grinding chamber; 503, long axis surface of inner cylinder; 504, grinding gap; 505, extended arc surface; 506, bell-shaped opening; 6, partition; 7, second sieve hole; 8, primary grinding medium; 9, secondary grinding medium; 10, outer cylinder; 101, outer grinding chamber; 11, outer grinding medium; 12, first gear; 13, gear shaft; 14, second gear; 15, gear Ring; 16. Motor; 17. Belt; 18. Driven pulley; 19. Blocking cover; 20. Air pipe; 21. Sealing door; 22. First sieve hole; 23. Driving pulley; 24. First anti-return spring; 241. Opening of first anti-return spring; 242. First protrusion; 243. First rotating shaft; 244. Rotating shaft sleeve; 2441. Rotating shaft sleeve opening; 2442. Upper edge of rotating shaft sleeve opening; 25. Second anti-return spring; 251. Opening of second anti-return spring; 252. Second rotating shaft; 26. Filter plate. DETAILED DESCRIPTION

[0048] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below with reference to the accompanying drawings and through specific embodiments. Figure 4 The orientation is referenced.

[0049] The present invention provides metal powder production equipment, comprising an inner cylinder and an outer cylinder. The inner cylinder is disposed within the outer cylinder and is capable of relative rotation with the outer cylinder, forming an outer grinding chamber between the inner cylinder and the outer cylinder. Two partitions are disposed within the inner cylinder, dividing the inner cylinder into a primary grinding chamber and two secondary grinding chambers, with the two secondary grinding chambers disposed on either side of the primary grinding chamber. First sieve holes are provided on the two partitions, connecting the primary grinding chamber to the two secondary grinding chambers. Second sieve holes are provided on the side walls of the two secondary grinding chambers, connecting both secondary grinding chambers to the outer grinding chamber. The aperture of the first sieve hole is larger than the aperture of the second sieve hole. Grinding media are disposed in the primary grinding chamber, the secondary grinding chamber, and the outer grinding chamber, with the diameters of the media in the primary grinding chamber, the secondary grinding chamber, and the outer grinding chamber decreasing in size. The present invention improves the effect and efficiency of powder preparation and effectively solves the problems existing in the prior art.

[0050] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Instead, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0051] Example 1:

[0052] Reference Figure 4 、 Figures 9-12 、 Figure 16 、 Figure 17 、 Figure 21 and Figure 22 The present invention provides a metal powder production apparatus comprising an inner cylinder 5 and an outer cylinder 10. The inner cylinder 5 is disposed within the outer cylinder 10, and the inner cylinder 5 and the outer cylinder 10 are capable of relative rotation. This relative rotation can mean that the inner cylinder 5 and the outer cylinder 10 rotate simultaneously but in opposite directions, or that the outer cylinder 10 is fixed while the inner cylinder 5 rotates relative to the outer cylinder 10. This embodiment primarily describes the simultaneous rotation of the inner cylinder 5 and the outer cylinder 10 but in opposite directions. An external grinding chamber 101 is formed between the inner cylinder 5 and the outer cylinder 10.

[0053] Furthermore, two partitions 6 are provided within the inner cylinder 5, dividing the inner cylinder 5 into a primary grinding chamber 501 and two secondary grinding chambers 502. The two secondary grinding chambers 502 are located on either side of the primary grinding chamber 501. The present invention utilizes the two cylindrical structures of the inner cylinder 5 and the outer cylinder 10 to form three levels of grinding chambers, namely the primary grinding chamber 501, the secondary grinding chamber 502, and the outer grinding chamber 101, thereby effectively achieving the purpose of graded grinding.

[0054] Furthermore, the two partitions 6 can be arranged in parallel, and the two secondary grinding chambers 502 can be arranged symmetrically. For detailed description, refer to Figure 9 , if perpendicular to Figure 9 The center of the middle inner cylinder 5 is made into a horizontal plane, and the two secondary grinding chambers 502 are symmetrical with respect to the horizontal plane, and the two partitions 6 are also parallel to the horizontal plane. This arrangement is to make the rotation of the inner cylinder 5 more balanced and stable.

[0055] Both partitions 6 have first sieve holes 22, connecting the primary grinding chamber 501 and the two secondary grinding chambers 502 through the first sieve holes 22. Material crushed and ground in the primary grinding chamber 501 passes through the first sieve holes 22 and enters the two secondary grinding chambers 502. Second sieve holes 7 are provided in the sidewalls of the two secondary grinding chambers 502, specifically, the second sieve holes 7 are located on the sidewalls of the inner cylinder 5 corresponding to the secondary grinding chambers 502. The second sieve holes 7 connect the two secondary grinding chambers 502 with the outer grinding chamber 101, allowing crushed and ground material in the two secondary grinding chambers 502 to enter the outer grinding chamber 101. The aperture of the first sieve holes 22 is larger than that of the second sieve holes 7, resulting in a gradually finer grinding process from the primary grinding chamber 501 to the secondary grinding chamber 502 and then to the outer grinding chamber 101.

[0056] Grinding media are provided in the primary grinding chamber 501, the secondary grinding chamber 502, and the outer grinding chamber 101. The diameter of the primary grinding media 8 in the primary grinding chamber 501 is larger than the diameter of the secondary grinding media 9 in the secondary grinding chamber 502, and the diameter of the secondary grinding media 9 in the secondary grinding chamber 502 is larger than the diameter of the outer grinding media 11 in the outer grinding chamber 101. The grinding media in the present invention can be steel balls.

[0057] Furthermore, the structure of the outer cylinder 10 and the inner cylinder 5 can be one of the following structures: The first structure: refer to Figure 9 and Figure 10 The radial cross section of the outer cylinder 10 can be circular, while the radial cross section of the inner cylinder 5 can be elliptical, and the inner cylinder 5 and the outer cylinder 10 are coaxial. Specifically, the inner cylinder 5 and the outer cylinder 10 can rotate coaxially. A grinding gap 504 is formed between the long axis surface 503 of the inner cylinder 5 and the inner wall of the outer cylinder 10. The long axis surface 503 of the inner cylinder 5 mentioned here refers to the surfaces corresponding to the two ends of the long axis of the elliptical inner cylinder 5. Figure 9 and Figure 10 The intersection of the long axis and the short axis of the inner tube 5 is the center of the inner tube 5, perpendicular to Figure 9 or Figure 10 The axis at the center of the inner cylinder 5 is the central axis, which is the rotation axis of the inner cylinder 5 and the outer cylinder 10.

[0058] The second structural form: reference Figure 21 and Figure 22 The radial cross section of the outer cylinder 10 can be circular, while the radial cross section of the inner cylinder 5 can be runway-shaped. Figure 23 As shown, the left and right side surfaces of the inner cylinder 5 are flat, while the upper and lower end surfaces are arcuate. The inner cylinder 5 is coaxial with the outer cylinder 10. Specifically, the inner cylinder 5 and the outer cylinder 10 can rotate coaxially. A grinding gap 504 is formed between the long axis surface 503 of the inner cylinder 5 and the inner wall of the outer cylinder 10. The long axis surface 503 of the inner cylinder 5 mentioned here refers to the inner cylinder 5. Figure 23 As shown, the two ends of the long axis CZ of the racetrack-shaped inner cylinder 5 correspond to the surface. Figure 23 The axis DZ in the middle is the short axis of the racetrack-shaped inner cylinder 5. Figure 23 The intersection of the long axis CZ and the short axis DZ of the inner tube 5 is the center of the inner tube 5, which is perpendicular to Figure 23 The axis at the center of the inner cylinder 5 is the central axis, which is the rotation axis of the inner cylinder 5 and the outer cylinder 10.

[0059] The material can be further finely ground through the grinding gap 504. The spacing of the grinding gap 504 is smaller than the diameter of the outer grinding medium 11, and the size of the grinding gap 504 can be adjusted according to the particle size requirement of the material to be ground.

[0060] Further, refer to Figure 4 、 Figure 9 、 Figure 10 、 Figure 21 、 Figure 22 The long axis surface 503 of the inner cylinder 5 can also be provided with an extended arc surface 505. A grinding gap 504 is formed between the extended arc surface 505 and the inner wall of the outer cylinder 10. The purpose of providing the extended arc surface 505 is to increase the grinding area of ​​the grinding gap 504 without changing the short axis of the inner cylinder 5, thereby improving the grinding effect. In addition, referring to Figure 15 A bell-shaped opening 506 is formed between the ends of the outer arc surface 505 and the inner wall of the outer cylinder 10. The bell-shaped opening 506 communicates with the grinding gap 504. The widest part of the bell-shaped opening 506 is smaller than the diameter of the external grinding medium 11 to prevent the external grinding medium 11 from entering. The bell-shaped opening 506 is mainly used to facilitate the entry of material so that the material can be further ground through the grinding gap 504.

[0061] Further, refer to Figure 1-3 , further comprising a base 1. Two brackets 3 are fixedly mounted on the base 1. The ends of the outer cylinder 10 are mounted on the two brackets 3. A drive assembly is mounted on the brackets 3 for driving relative rotation between the inner cylinder 5 and the outer cylinder 10. Support legs 2 are mounted at the bottom of the base 1 for support.

[0062] Furthermore, a hollow tube 4 is rotatably mounted on each of the two brackets 3. Hollow tube 4 passes through the end sidewall of the outer cylinder 10 and is coaxially connected to the inner cylinder 5. The inner cavity of hollow tube 4 communicates with the primary grinding chamber 501. Bearings can be provided between hollow tube 4 and the end sidewall of the outer cylinder 10 to facilitate smoother rotation of the hollow tube 4 and the outer cylinder 10. Hollow tube 4 can be mounted on bracket 3 via bearings. Hollow tube 4 can drive the inner cylinder 5 to rotate.

[0063] Further, refer to Figure 3 、 Figure 7 and Figure 8 The drive assembly includes a gear set and a motor 16. The gear set is arranged at one end of the outer cylinder 10. The gear set includes a first gear 12, a second gear 14 and a ring gear 15. The first gear 12 is sleeved on the hollow tube 4 and the first gear 12 is fixedly connected to the hollow tube 4. The second gear 14 engages with the first gear 12. The second gear 14 can be set on the bracket 3 through the gear shaft 13. The ring gear 15 is sleeved outside the first gear 12 and the second gear 14, and the ring gear 15 engages with the second gear 14. The ring gear 15 is fixedly connected to the outer wall of the end of the outer cylinder 10. Of course, this is not an exhaustive list, and any other form of gear matching with equivalent function can also be used.

[0064] The motor 16 is used to drive the first gear 12 to rotate. Figure 3 、 5 and 6, a driven pulley 18 is fixedly provided on the hollow tube 4 at the other end of the outer tube 10, and the driven pulley 18 can drive the hollow tube 4 to rotate. The driven pulley 18 is connected to the driving pulley 23 through the transmission belt 17. The driving pulley 23 is connected to the output shaft of the motor 16. The process of the motor driving the inner tube 5 and the outer tube 10 to rotate is as follows: For the sake of convenience, the hollow tube 4 fixed to the driven pulley 18 will be referred to as the "driving hollow tube", and the hollow tube 4 connected to the first gear 12 will be referred to as the "driven hollow tube". The starting motor 16 drives the driving pulley 23 to rotate, and the driving pulley 23 drives the driven pulley 18 to rotate through the transmission belt 17, and the driven pulley 18 drives the "driving hollow tube" to rotate, thereby rotating the inner tube 5. At the same time, the "driven hollow tube" at the other end drives the first gear 12 to rotate, and the first gear 12 engages with the second gear 14 to rotate. The rotation of the second gear 14 directly drives the ring gear 15 to rotate, and then drives the outer cylinder 10 to rotate, and the rotation direction of the outer cylinder 10 is opposite to the rotation direction of the inner cylinder 5.

[0065] Further, refer to Figure 10-14, a first non-return spring piece 24 can be provided on the partition 6, and the first non-return spring piece 24 is provided corresponding to the first sieve hole 22. The first non-return spring piece 24 is provided in the secondary grinding chamber 502, and the first non-return spring piece 24 extends in the direction of the first sieve hole 22 to just block the first sieve hole 22. If there are multiple first non-return spring pieces 24, all the first non-return spring pieces 24 extend in the same direction, and the gap between two adjacent first non-return spring pieces 24 should be such as not to affect the movement of the material in the primary grinding chamber 501 into the secondary grinding chamber 502. The gap between two adjacent first non-return spring pieces 24 mentioned here refers to the shortest distance between two adjacent first non-return spring pieces 24 when the opening 241 of the first non-return spring piece 24 is opened. In addition, if there are multiple first non-return spring pieces 24, the front end of the latter first non-return spring piece 24 can be located above the rear end of the previous first non-return spring piece 24, that is, Figure 12 For reference, the "left" in the figure is the front and the "right" is the back. Figure 12 The front end of the first anti-return spring 24 on the right side of the center is located above the rear end of the first anti-return spring 24 on the left side. A gap is left between the front end of the first anti-return spring 24 on the right side and the rear end of the first anti-return spring 24 on the left side. This gap is preferably sufficient to prevent material in the primary grinding chamber 501 from flowing back into the secondary grinding chamber 502. The first anti-return spring 24 prevents material in the secondary grinding chamber 502 from flowing back into the primary grinding chamber 501 through the first sieve aperture 22, thereby improving work efficiency. The front end of the subsequent first anti-return spring 24 is located above the rear end of the previous first anti-return spring 24. When the opening 241 of the subsequent first anti-return spring 24 is closed, it can overlap the rear end of the previous first anti-return spring 24, forming a continuous surface for the multiple first anti-return springs 24 to better prevent material from flowing back into the primary grinding chamber 501.

[0066] More preferably, refer to Figure 10-14 The opening 241 of the first anti-return spring 24 is in the same direction as the movement direction of the inner tube 5. Figure 10-14 The counterclockwise arrow N is the direction of movement of the inner cylinder 5, and the clockwise arrow S is the direction of movement of the outer cylinder 10. Figure 13 The example shown in FIG. 2 is that the opening 241 of the first anti-return spring 24 is in the same direction as the movement direction of the inner cylinder 5 . Figure 10-14The figure shows a structural form of the first anti-return spring piece 24. In this structural form, the first anti-return spring piece 24 is an elastic structure, one end of which is fixed, and the other end extends obliquely toward the first sieve hole 22 and forms an opening 241 of the first anti-return spring piece 24. If there are multiple first anti-return spring pieces 24, the multiple first anti-return spring pieces 24 have the same inclination angle, that is, the openings 241 of the first anti-return spring pieces 24 in the same secondary grinding chamber 502 are in the same direction. The opening 241 of the first anti-return spring piece 24 is closed when it is under pressure, and when the pressure is released, the opening 241 of the first anti-return spring piece 24 reopens under the action of the elasticity of the first anti-return spring piece 24 itself. Its working principle is as follows: For the convenience of description, the following will be Figure 10 The secondary grinding chamber 502 located above the primary grinding chamber 501 is called the "upper secondary grinding chamber", and the secondary grinding chamber 502 located below the primary grinding chamber 501 is called the "lower secondary grinding chamber". Figure 10 In the position shown, the first anti-return spring 24 in the "upper secondary grinding chamber" is pressed by the secondary grinding media 9 and the material, causing the opening 241 of the first anti-return spring 24 to close, thereby covering the first sieve hole 22 on the partition 6 corresponding to the "upper secondary grinding chamber" to prevent the material in the "upper secondary grinding chamber" from falling back into the primary grinding chamber 501. At this time, the secondary grinding media 9 and the material in the "next secondary grinding chamber" are located at the bottom of the "next secondary grinding chamber". Therefore, the first anti-return spring 24 in the "next secondary grinding chamber" is in a natural state, that is, the opening 241 of the first anti-return spring 24 is open, leaving a gap between the first anti-return spring 24 and the partition 6 corresponding to the "next secondary grinding chamber". This gap is connected to the first sieve hole 22. The material that has undergone primary grinding in the primary grinding chamber 501 will pass through this gap and the opening 241 of the first anti-return spring 24 and fall into the "next secondary grinding chamber". Because the first anti-return spring 24 is elastic, when a lot of materials fall from the primary grinding chamber 501, the first anti-return spring 24 in the "next secondary grinding chamber" can be pressed downward to increase the gap between the first anti-return spring 24 and the partition 6, thereby facilitating more materials to fall into the "next secondary grinding chamber". Figure 11The state shown is that the original "upper secondary grinding chamber" rotates to the left side of the primary grinding chamber 501, and the "next secondary grinding chamber" rotates to the right side of the primary grinding chamber 501. During this process, the secondary grinding medium 9 in the "upper secondary grinding chamber" will gradually flow downward along the first non-return spring piece 24 in the "upper secondary grinding chamber". Since the first non-return spring piece 24 is pressed to cover the first sieve hole 22, the material will not flow back into the primary grinding chamber 501 along the first sieve hole 22, and the opening 241 of the first non-return spring piece 24 is in the same direction as the movement direction of the inner cylinder 5. Therefore, as the inner cylinder 5 rotates, the direction of the opening 241 of the first non-return spring piece 24 will gradually rotate downward. During this process, even if the opening 241 of the first non-return spring piece 24 is gradually opened, the material will not be backflowed into the primary grinding chamber 501 until the inner cylinder 5 is completely rotated to Figure 11 In the state shown, the "upper secondary grinding chamber" is completely rotated to the left side of the primary grinding chamber 501. At this time, the secondary grinding media 9 in the secondary grinding chamber 502 will completely fall to the bottom. At this time, the first anti-return spring 24, which is not pressed by the secondary grinding media 9 and the material, is reset due to its elasticity, that is, the opening 241 of the first anti-return spring 24 is restored to the open state. On the other hand, during the rotation of the inner cylinder 5, the original "lower secondary grinding chamber" will rotate to the right side of the primary grinding chamber 501. During this process, the secondary grinding media 9 in the secondary grinding chamber 502 will always move along the bottom of the secondary grinding chamber 502 until some of the secondary grinding media 9 and the material begin to contact and gradually press the first anti-return spring 24 in the secondary grinding chamber 502. Then, the opening 241 of the pressed first anti-return spring 24 will gradually close, so that the first anti-return spring 24 is gradually fastened to the first sieve hole 22 of the partition 6, until the inner cylinder 5 rotates to Figure 10 At this time, the opening 241 of the first anti-return spring 24 will be gradually pressed and closed.

[0067] The first anti-return spring 24 can also be set in another form: Figure 16-Figure 22 One end of the first anti-return spring 24 is set on the partition 6 through the first rotating shaft 243, and the other end extends toward the first sieve hole 22 to cover the first sieve hole 22. The other end of the first anti-return spring 24 forms an opening 241 of the first anti-return spring 24. The first anti-return spring 24 can rotate around the first rotating shaft 243. The characteristic of this structural form is that when the inner cylinder 5 is in Figure 16When in the position shown, the first anti-return spring 24 in the "upper secondary grinding chamber" can cover the first sieve hole 22 under the action of its own gravity even without the pressure of the secondary grinding medium 9. In the "lower secondary grinding chamber", the opening 241 of the first anti-return spring 24 is opened under the action of its own gravity. In order to prevent the opening 241 of the first anti-return spring 24 from opening at too large an angle, a limiting structure can be provided so that the opening 241 of the first anti-return spring 24 stops opening after opening to a certain extent. The structure can adopt any existing known structure, and of course, it can also adopt the following structure: Figure 19 and Figure 20 The structure shown. Figure 19 and Figure 20 The first rotating shaft 243 is disposed within a rotating shaft sleeve 244, which is disposed on the partition 6. A rotating shaft sleeve opening 2441 is formed on one side of the rotating shaft sleeve 244. The rear end of the first anti-return spring 24 extends into the rotating shaft sleeve opening 2441 and is sleeved onto the first rotating shaft 243. When the first anti-return spring 24 rotates about the first rotating shaft 243, the upper edge 2442 of the rotating shaft sleeve opening can limit the first anti-return spring 24, preventing the opening 241 of the first anti-return spring 24 from opening too wide. Furthermore, the end of the first anti-return spring 24 extending into the rotating shaft sleeve 244 can contact and slide with the inner wall of the rotating shaft sleeve 244. In this embodiment, the first anti-return spring 24 can also be configured as an elastic structure.

[0068] Furthermore, the first sieve holes 22 may be arranged in multiple rows, with each row of first sieve holes 22 having multiple first sieve holes 22. Thus, a first anti-return spring 24 may be provided for each row of first sieve holes 22, or each first anti-return spring 24 may cover multiple rows of first sieve holes 22. The arrangement method may be selected as needed. In this embodiment, each first anti-return spring 24 covers multiple rows of first sieve holes 22 as an example.

[0069] Furthermore, a plurality of first protrusions 242 may be provided on the back of the first anti-return spring piece 24 to enhance the grinding effect. The back of the first anti-return spring piece 24 is the side in contact with the secondary grinding medium 9, i.e. Figure 14 The top of the first anti-return spring 24 is shown.

[0070] Further, refer to Figures 10-18 、 Figure 21 and Figure 22 Etc., a second anti-return spring piece 25 can be provided on the outer wall of the inner tube 5, and the second anti-return spring piece 25 is provided corresponding to the second sieve hole 7. The second anti-return spring piece 25 extends toward the second sieve hole 7 so as to cover the second sieve hole 7. When there are multiple second anti-return spring pieces 25, the multiple second anti-return spring pieces 25 on the same side of the inner tube 5 extend in the same direction, i.e. Figure 10For reference, the multiple second check springs 25 on the left side of the inner cylinder 5 extend in the same angular direction, meaning their openings 251 face the same direction. The multiple second check springs 25 on the right side of the inner cylinder 5 extend in the same angular direction, meaning their openings 251 face the same direction. Furthermore, when there are multiple second check springs 25, the gap between two adjacent second check springs 25 is determined to ensure that they do not hinder the movement of material discharged from the secondary grinding chamber 502. The gap between two adjacent second check springs 25 refers to the minimum distance between them when their openings 251 are open. The second check springs 25 prevent material in the outer grinding chamber 101 from flowing back into the secondary grinding chamber 502 through the second sieve apertures 7.

[0071] Furthermore, the opening 251 of the second anti-return spring 25 is in the same direction as the movement direction of the inner cylinder 5. Figure 10 、 Figure 11 and Figure 13 The example shown is that the opening 251 of the second anti-return spring 25 is in the same direction as the movement direction of the inner cylinder 5. Figure 11 The outer grinding chamber 101 located above the inner cylinder 5 is called the "upper outer grinding chamber", and the outer grinding chamber 101 located below the inner cylinder 5 is called the "lower outer grinding chamber". Figure 11 When the position is shown, the second anti-return spring 25 in the "upper outer grinding chamber" is gradually pressed by the outer grinding medium 11 and the material, so that the opening 251 of the second anti-return spring 25 is closed, and then the corresponding second sieve hole 7 is covered to prevent the material in the "upper outer grinding chamber" from falling back into the secondary grinding chamber 502. For specific status, please refer to Figure 11 The state of the second anti-return spring piece 25 on the right side of the "upper outer grinding chamber". The second anti-return spring piece 25 that is not pressed is still in a natural state, that is, the opening 251 of the second anti-return spring piece 25 is open. Figure 11 The state of the second non-return spring piece 25 on the left side of the "upper outer grinding chamber". At this time, the external grinding medium 11 and materials in the "lower outer grinding chamber" are located at the bottom of the "lower outer grinding chamber". Therefore, the second non-return spring piece 25 in the "lower outer grinding chamber" is in a natural state, that is, the opening 251 of the second non-return spring piece 25 is open, and there is a gap between the second non-return spring piece 25 and the outer wall of the inner cylinder 5, and the gap is connected to the second sieve hole 7. The materials that have undergone secondary grinding in the secondary grinding chamber 502 will pass through the gap and the opening 251 of the second non-return spring piece 25 and fall into the "lower outer grinding chamber". For details, please refer to Figure 11The state of the second anti-return spring 25 on the left side of the "lower outer grinding chamber" is shown in FIG. At this time, the material in the secondary grinding chamber 502 on the left side will fall into the "lower outer grinding chamber". Because the second anti-return spring 25 is elastic, when a large amount of material falls from the secondary grinding chamber 502, the second anti-return spring 25 will be pressed downward to increase the gap between the second anti-return spring 25 and the outer wall of the inner cylinder 5, thereby facilitating the material to fall into the "lower outer grinding chamber". As the inner cylinder 5 continues to rotate to Figure 10 The state shown is that the original "upper outer grinding chamber" rotates to the left side of the inner cylinder 5, and the "lower outer grinding chamber" rotates to the right side of the inner cylinder 5. During this process, the external grinding medium 11 in the "upper outer grinding chamber" will gradually flow downward along the second non-return spring piece 25. Since the second non-return spring piece 25 is pressed to cover the second sieve hole 7, the material will not be backflowed into the secondary grinding chamber 502. Moreover, during the rotation of the inner cylinder 5, the opening 251 of the second non-return spring piece 25 is in the same direction as the movement direction of the inner cylinder 5. Therefore, as the inner cylinder 5 rotates, the opening 251 of the second non-return spring piece 25 will also gradually rotate downward. During this process, even if the opening 251 of the second non-return spring piece 25 is gradually opened, the material will not be backflowed into the secondary grinding chamber 502 until the inner cylinder 5 is completely rotated to Figure 10 The status shown. Figure 10 In the state shown, the outer grinding medium 11 will completely fall to the bottom of the two outer grinding chambers 101. At this time, the second anti-return spring 25, which is not pressed by the outer grinding medium 11 and the material, is reset due to its elasticity, that is, the opening 251 of the second anti-return spring 25 is opened, so that the second anti-return spring 25 returns to the state of maintaining a gap with the outer wall of the inner cylinder 5. On the other hand, during the rotation of the inner cylinder 5, the original "lower outer grinding chamber" will rotate to the right side of the inner cylinder 5. During this process, the outer grinding medium 11 in the outer grinding chamber 101 will always move along the bottom of the outer grinding chamber 101 until part of the outer grinding medium 11 and the material begin to contact and gradually press against the second anti-return spring 25 in the outer grinding chamber 101. Then, the opening 251 of the second anti-return spring 25 will gradually close, so that the second anti-return spring 25 is gradually fastened to the second sieve hole 7, until the inner cylinder 5 rotates to the right again. Figure 11 At this time, the opening 251 of the pressed second anti-return spring 25 will be completely closed.

[0072] In addition, refer to Figure 16-Figure 18 、 Figure 21 and Figure 22 The second anti-return spring piece 25 can also be set in the following form: one end of the second anti-return spring piece 25 is set on the outer wall of the inner tube 5 through the second rotating shaft 252, and the second anti-return spring piece 25 can rotate around the second rotating shaft 252. Its specific structural form can be referred to Figure 19 and Figure 20The installation form of the first anti-return spring piece 24 shown in the figure has the same structure and principle, which will not be described in detail here. In this form, the second anti-return spring piece 25 itself can also be set as an elastic component.

[0073] Furthermore, a second protrusion may be provided on the outer side of the second anti-return spring 25 , ie, on the side in contact with the outer grinding medium 11 , to enhance the grinding effect.

[0074] Furthermore, the second sieve holes 7 can be arranged in multiple rows, with multiple second sieve holes 7 in each row. In this way, a second anti-return spring 25 can be set for each row of second sieve holes 7, or one second anti-return spring 25 can cover multiple rows of second sieve holes 7.

[0075] Furthermore, a detachable blocking cover 19 may be provided at the pipe opening of the hollow tube 4 away from the inner tube 5 , and the blocking cover 19 may be matched with the hollow tube 4 in the form of threads.

[0076] The outer cylinder 10 is provided with an opening, and a sealing door 21 is installed at the opening for inspecting the inner situation of the outer cylinder 10 or taking out the ground metal powder particles.

[0077] In addition, a filter plate 26 can be fixedly installed in one of the hollow tubes 4. The filter holes on the filter plate 26 can be the same as the second sieve holes 7, and can be used to suck out the formed metal powder after grinding. In addition, a gas pipe 20 can be provided on the sealing cap 19, which can be connected to the inner tube 5, for use when gas needs to be introduced into the inner tube 5. Of course, it should be noted that the gas pipe 20, filter plate 26, etc. can be selected and arranged as needed.

[0078] Here, for Figure 22 For further explanation, Figure 22 The interior of the racetrack-shaped inner cylinder 5 is divided into three cylindrical cavities, that is, the primary grinding chamber 501 and the two secondary grinding chambers 502 are all cylindrical structures, or in other words, the radial cross-sections of the primary grinding chamber 501 and the two secondary grinding chambers 502 are all circular, and the centers of the three circles are all on the long axis CZ of the inner cylinder 5. In this method, the first anti-return spring 24 is set as follows Figure 22 The arc shape shown in FIG. 5 is used to better adapt to the inner wall shape of the secondary grinding chamber 502. The first anti-return spring 24 can be connected to the first rotating shaft 243 in the above-mentioned manner. Figure 19 and Figure 20 The two secondary grinding chambers 502 are preferably symmetrically arranged. For detailed description, refer to Figure 22 , if perpendicular to Figure 22 The center of the middle inner cylinder 5 is formed into a horizontal plane, and the two secondary grinding chambers 502 are symmetrical with respect to the horizontal plane.

[0079] Further explanation: The structure, principle, and usage process of the present invention are further sorted out in the form of examples with reference to the accompanying drawings. This description is only used as an example to combine the above-mentioned multiple preferred embodiments for the convenience of comprehensive description, but this description is not a limitation of the embodiments of the present application. The description is as follows:

[0080] The initial metal material to be ground is introduced into one of the hollow tubes 4 , and then the hollow tube 4 is covered with a sealing cap 19 .

[0081] Motor 16 is started. After this, the inner and outer cylinders 5 and 10 rotate relative to each other. Here, the inner and outer cylinders 5 and 10 rotate simultaneously and in opposite directions, and the inner cylinder 5 is provided with an extended curved surface 505. A first anti-return spring 24 is provided on the partition 6, and a second anti-return spring 25 is provided on the outer wall of the inner cylinder 5.

[0082] When the inner cylinder 5 rotates, it drives the primary grinding media 8 in the primary grinding chamber 501 to perform primary crushing and grinding on the initial metal material. Figure 10 In the position shown, the ground metal particles enter the secondary grinding chamber 502 below the primary grinding chamber 501 through the first sieve holes 22 on the partition 6. As the inner cylinder 5 continues to rotate, it drives the secondary grinding media 9 in the two secondary grinding chambers 502 to further crush and grind the metal particles. The ground metal powder enters the outer grinding chamber 101 through the second sieve holes 7 on the inner cylinder 5. At this time, due to the relative rotation between the inner cylinder 5 and the outer cylinder 10, the outer grinding media 11 further crushes and grinds the metal powder in the outer grinding chamber 101. During this process, the metal powder entering the grinding gap 504 through the bell-shaped opening 506 is further ground by the grinding gap 504, thereby producing formed metal powder particles.

[0083] In summary, the present invention can crush and grind the material step by step in the same equipment to form metal powder, and there will be no interference between different grinding media, which improves the effect and efficiency of powder preparation and well solves the problems existing in the prior art.

[0084] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features.

[0085] In the present invention, unless otherwise specified or limited, the terms "install", "connect", "fix" and the like should be understood in a broad sense. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0086] In the description of this specification, the terms "embodiment", "further description", etc. refer to the specific features, structures, materials or characteristics described in conjunction with the embodiment or example included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0087] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A metal powder production equipment, characterized by: The invention comprises an inner cylinder (5) and an outer cylinder (10); the inner cylinder (5) is arranged in the outer cylinder (10), and the inner cylinder (5) and the outer cylinder (10) are capable of relative rotation, and an outer grinding chamber (101) is formed between the inner cylinder (5) and the outer cylinder (10); the inner cylinder (5) and the outer cylinder (10) are capable of rotating simultaneously, and the rotation directions are opposite; Two partitions (6) are provided in the inner cylinder (5), and the two partitions (6) are arranged in parallel to each other, dividing the inner cylinder (5) into a primary grinding chamber (501) and two secondary grinding chambers (502), the two secondary grinding chambers (502) are arranged on both sides of the primary grinding chamber (501) and symmetrically between the two secondary grinding chambers (502); a first sieve hole (22) is provided on each of the two partitions (6), so that the primary grinding chamber (501) is communicated with the two secondary grinding chambers (502); a second sieve hole (7) is provided on the side wall of the two secondary grinding chambers (502), so that the two secondary grinding chambers (502) are communicated with the outer grinding chamber (101); the aperture of the first sieve hole (22) is larger than the aperture of the second sieve hole (7); the inner cylinder (5) can drive the primary grinding chamber (501) and the two secondary grinding chambers (502) to grind together; The primary grinding chamber (501), the secondary grinding chamber (502) and the outer grinding chamber (101) are all provided with grinding media, and the diameters of the grinding media in the primary grinding chamber (501), the secondary grinding chamber (502) and the outer grinding chamber (101) are successively smaller; the radial cross-section of the outer cylinder (10) is circular, the radial cross-section of the inner cylinder (5) is elliptical or racetrack-shaped, and the inner cylinder (5) and the outer cylinder (10) are coaxial; the long axis surface (503) of the inner cylinder (5) is provided with an extended arc surface (505), and a grinding gap (504) is formed between the extended arc surface (505) and the inner wall of the outer cylinder (10), and the extended arc surface A trumpet-shaped opening (506) is formed between the two ends of (505) and the inner wall of the outer cylinder (10); a first anti-return spring (24) is provided on the partition (6) at a position corresponding to the first sieve hole (22), and the opening of the first anti-return spring (24) is in the same direction as the movement direction of the inner cylinder (5); a second anti-return spring (25) is provided on the outer wall of the inner cylinder (5) at a position corresponding to the second sieve hole (7), and the opening of the second anti-return spring (25) is in the same direction as the movement direction of the inner cylinder (5); the opening of the first anti-return spring (24) and the opening of the second anti-return spring (25) are both structures that can be closed by the pressure of the grinding medium and the material.

2. The metal powder production equipment according to claim 1, characterized in that: The long axis surface (503) is provided with an extended arc surface (505), and a grinding gap is formed between the extended arc surface (505) and the inner wall of the outer cylinder (10).

3. The metal powder production equipment according to claim 1, characterized in that: It also includes a base (1); two brackets (3) are fixedly arranged on the base (1); both ends of the outer cylinder (10) are arranged on the two brackets (3); and a driving assembly is arranged on the bracket (3) for driving the inner cylinder (5) and the outer cylinder (10) to rotate relative to each other.

4. The metal powder production equipment according to claim 3, characterized in that: A hollow tube (4) is rotatably provided on each of the two supports (3); the hollow tube (4) is coaxially connected to the inner cylinder (5) and communicates with the primary grinding chamber (501).

5. The metal powder production equipment according to claim 4, characterized in that: The driving assembly comprises a gear set and a motor (16); the gear set is located at one end of the outer cylinder (10) and comprises a first gear (12), a second gear (14) and a ring gear (15); the first gear (12) is sleeved on the hollow tube (4) and fixedly connected to the hollow tube (4); the second gear (14) meshes with the first gear (12); the ring gear (15) is sleeved outside the first gear (12) and the second gear (14) and meshes with the second gear (14), and the ring gear (15) is fixedly connected to the outer cylinder (10); the motor (16) is used to drive the first gear (12) to rotate.

6. The metal powder production equipment according to claim 5, characterized in that: A driven pulley (18) is fixedly sleeved on the hollow tube (4) at the other end of the outer cylinder (10), and the driven pulley (18) is connected to a driving pulley (23) through a transmission belt (17); and the driving pulley (23) is connected to the motor (16).

7. The metal powder production equipment according to claim 1, characterized in that: The first anti-return spring (24) is arranged on one side of the secondary grinding chamber (502), and the first anti-return spring (24) extends toward the first sieve hole (22) to block the first sieve hole (22).

8. The metal powder production equipment according to claim 1, characterized in that: The second anti-return spring (25) extends toward the second sieve hole (7) to cover the second sieve hole (7).

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