Metal powder production equipment

Abstract

The invention relates to metal powder production equipment, which relates to the field of metal powder production and comprises an inner cylinder and an outer cylinder. The inner cylinder is arranged in the outer cylinder, the inner cylinder and the outer cylinder can rotate relatively, and an outer grinding cavity is formed between the inner cylinder and the outer cylinder. Two partition plates are arranged in the inner barrel and divide the inner barrel into a primary grinding cavity and two secondary grinding cavities, and the two secondary grinding cavities are formed in the two sides of the primary grinding cavity respectively. And first sieve holes are formed in the two partition plates, so that the primary grinding cavity is communicated with the two secondary grinding cavities. Second sieve holes are formed in the side walls of the two secondary grinding cavities, so that the two secondary grinding cavities communicate with the outer grinding cavity. And the aperture of the first sieve pores is greater than that of the second sieve pores. Grinding media are arranged in the primary grinding cavity, the secondary grinding cavity and the outer grinding cavity, and the diameters of the media in the primary grinding cavity, the secondary grinding cavity and the outer grinding cavity are sequentially decreased. The powder preparation effect and efficiency are improved, and the problems existing in the prior art are well solved.

Description

Technical Field

[0001] The invention relates to the field of metal powder production, and in particular to a metal powder production device. 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, the physical method includes high-energy ball milling, and ball mills are used in the high-energy ball milling method.

[0003] A ball mill generally places grinding media in a ball mill tube, and then crushes and grinds the materials placed in the ball mill tube. There are usually two ways to use an existing ball mill. One way of using the ball mill is to select grinding media of different sizes when materials of different sizes need to be ground. For example, if materials of larger particle sizes need to be ground, grinding media of larger sizes can be selected, and if materials of smaller sizes need to be ground, grinding media of smaller sizes can be selected. However, this method has the following problems: large-sized grinding media have better crushing effect, but cannot be finely ground, and although smaller-sized grinding media can be finely ground, the crushing effect is not good. In this way, when materials of smaller sizes need to be ground, but the size of the initial materials before grinding is large, it is necessary to replace grinding media of different sizes or even different equipment and perform multiple and multi-level crushing and grinding to achieve the desired result, which greatly reduces production efficiency. Another way of using is to directly place grinding media of different sizes in the same ball mill, and then perform indiscriminate crushing and fine grinding processes on the materials placed in the ball mill, that is, the crushing function is achieved by large-sized grinding media, and the fine grinding function is achieved by small-sized grinding media. However, in this method, since grinding media of different sizes work in the same ball mill, the proportion of grinding media of different sizes will also affect the final grinding effect. Too many large-sized grinding media will have a good crushing effect, but a poor fine grinding effect, which affects the final yield. Too many small-sized grinding media, although the fine grinding effect is good, the crushing effect is poor, which greatly affects the production efficiency. Therefore, sometimes it is necessary to strictly limit the use ratio of grinding media of different sizes according to different materials, in order to balance the needs between crushing and fine grinding as much as possible. However, since grinding media of different sizes will inevitably interfere with each other when performing their respective functions, which will affect their respective functions, so that each size of grinding media cannot fully play its role, reducing production efficiency and affecting the grinding effect.

[0004] The patent application with publication number CN114309626A discloses a high-efficiency ball mill for powder metallurgy. The ball mill still uses a ball milling method of unifying the materials in a common ball mill cylinder 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: The purpose 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.

[0007] Technical solution: To achieve the above object, the present invention provides the following technical solutions: 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 can rotate relative to each other, and an outer grinding chamber is formed between the inner cylinder and the outer cylinder. Two partitions are arranged in the inner cylinder to divide 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. First sieve holes are provided on both partitions, so that the primary grinding chamber is connected with the two secondary grinding chambers. Second sieve holes are provided on the side walls of the two secondary grinding chambers, so that the two secondary grinding chambers are connected with the outer grinding chamber. The aperture of the first sieve hole is larger than the aperture of the second sieve hole. Grinding media are arranged 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 are successively reduced.

[0008] 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 is coaxial with the outer cylinder. 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.

[0009] 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.

[0010] Preferably, it also includes a base. Two brackets are fixedly arranged on the base. Two ends of the outer cylinder are arranged on the two brackets. A driving assembly is arranged on the bracket to drive the inner cylinder and the outer cylinder to rotate relative to each other.

[0011] 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.

[0012] Preferably, the driving 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 gear ring. The first gear is sleeved on the hollow tube and fixedly connected to the hollow tube. The second gear meshes with the first gear. The gear ring is sleeved outside the first gear and the second gear and meshes with the second gear, and the gear ring is fixedly connected to the outer tube. The motor is used to drive the first gear to rotate.

[0013] 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 through a transmission belt. The driving pulley is connected to the motor.

[0014] Preferably, a first anti-return spring is arranged on the partition and corresponds to the first sieve hole. The first anti-return spring is arranged on one side of the secondary grinding chamber and extends toward the first sieve hole to cover the first sieve hole.

[0015] Preferably, the outer side wall of the inner cylinder is provided with a second anti-return spring sheet, which is provided corresponding to the second sieve hole and extends toward the second sieve hole to cover the second sieve hole.

[0016] Preferably, the two secondary grinding chambers are arranged symmetrically.

[0017] Beneficial effects: The present invention provides a metal powder production equipment, which divides an inner cylinder into three cavities, namely a primary grinding chamber and two secondary grinding chambers, and an outer grinding chamber is formed between the inner cylinder and the outer cylinder, and the grinding media in each grinding chamber have the same specifications, which well avoids the technical problem of mutual interference of grinding media of different sizes. In addition, for different grinding chambers, the built-in grinding media are distinguished in specifications, that is, the diameters of the grinding media in the primary grinding chamber, the secondary grinding chamber and the outer grinding chamber are successively reduced to achieve the purpose of step-by-step fine grinding. Specifically, the primary grinding media in the primary grinding chamber is larger than the secondary grinding media in the secondary grinding chamber, and the secondary grinding media in the secondary grinding chamber is larger than the external grinding media in the external grinding chamber, thereby distinguishing the preparation process of the metal powder step by step, step by step, and towards the direction of gradually fine grinding. The primary grinding media, the secondary grinding media and the external grinding media all independently play their respective roles, and there is no mutual interference between the grinding media of different sizes, which increases the contact efficiency of each grinding medium with the material of the corresponding size, thereby improving the preparation efficiency of the metal powder.

[0018] 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.

[0019] In summary, the present invention not only achieves the purpose of step-by-step fine grinding in 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 well solving the problems existing in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 For the present invention Figure 1 A magnified schematic diagram of point A; Figure 3 It is a three-dimensional structural schematic diagram of another angle of the present invention; Figure 4 A three-dimensional cross-sectional view showing the matching relationship between the inner cylinder and the outer cylinder; Figure 5 It is a half-section schematic diagram of the three-dimensional structure of the present invention; Figure 6 For the present invention Figure 5 An enlarged schematic diagram of point B; Figure 7 This is a schematic diagram of the end of the outer cylinder of the present invention; Figure 8 A three-dimensional schematic diagram of a form of the inner cylinder of the present invention; Fig. 9 A schematic diagram showing the internal arrangement of the inner and outer cylinders; Fig.10 A schematic diagram of the structure of the best embodiment of the present invention; Fig.11 for Fig.10 Rotate the state diagram by 90 degrees; Fig.12 for Fig.10 A simplified schematic diagram of Fig.13 for Fig.12 Magnified view of part C; Fig.14 is a schematic diagram of an optimized structure of the first anti-return spring; Fig.15 for Fig.12 Magnified view of the D part; Fig.16 It is a schematic diagram of another implementation of the first anti-return spring piece and the second anti-return spring piece; Fig.17 for Fig.16 Schematic diagram of rotation state; Fig.18 for Fig.16 Enlarged view of part E; Fig.19 for Fig.16A cross-sectional view of an installation method of the first anti-return spring; Fig. 20 is a three-dimensional diagram of a rotating shaft sleeve; Fig.21 A schematic diagram of another form of the inner tube; Fig. 22 A schematic diagram of another form of the inner cylinder; Fig.23 A schematic diagram showing the relationship between the major axis and minor axis of the racetrack-shaped inner tube.

[0021] 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, trumpet-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 non-return spring; 241, opening of the first non-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 non-return spring; 251, opening of the second non-return spring; 252, second rotating shaft; 26, filter plate. DETAILED DESCRIPTION

[0022] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below in conjunction with the accompanying drawings through specific embodiments. Figure 4 The orientation is used as a reference.

[0023] 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 can rotate relative to each other, and an outer grinding chamber is formed 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 the two partitions, so that the primary grinding chamber is connected with the two secondary grinding chambers. A second sieve hole is provided on the side wall of the two secondary grinding chambers, so that the two secondary grinding chambers are connected with the outer grinding chamber. The aperture of the first sieve hole is larger than the aperture of the second sieve hole. Grinding media are arranged in the primary grinding chamber, the secondary grinding chamber and the outer grinding chamber, and the diameters of the media in the primary grinding chamber, the secondary grinding chamber and the outer grinding chamber are successively reduced. The present invention improves the effect and efficiency of powder preparation and well solves the problems existing in the prior art.

[0024] In order to better understand the above technical solution, 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. On the contrary, 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.

[0025] Embodiment 1: Reference Figure 4 , Figure 9-12 , Fig.16 , Fig.17 , Fig.21 and Fig. 22 The present invention provides a metal powder production device, which includes 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 can rotate relative to each other. The relative rotation mentioned here can be that the inner cylinder 5 and the outer cylinder 10 rotate at the same time, but in opposite directions, or the outer cylinder 10 is fixed, and the inner cylinder 5 rotates relative to the outer cylinder 10. In this embodiment, the form of "the inner cylinder 5 and the outer cylinder 10 rotate at the same time, but in opposite directions" is mainly described. An outer grinding chamber 101 is formed between the inner cylinder 5 and the outer cylinder 10.

[0026] Furthermore, two partitions 6 are arranged in the inner cylinder 5, and the two partitions 6 divide the inner cylinder 5 into a primary grinding chamber 501 and two secondary grinding chambers 502, and the two secondary grinding chambers 502 are arranged on both sides of the primary grinding chamber 501. The present invention utilizes two cylinder structures such as the inner cylinder 5 and the outer cylinder 10 to form three levels of grinding chambers such as the primary grinding chamber 501, the secondary grinding chamber 502 and the outer grinding chamber 101, which can well achieve the purpose of graded grinding.

[0027] Further, the two partitions 6 can be arranged in parallel, and the two secondary grinding chambers 502 can be arranged symmetrically. For a specific description, refer to Fig. 9 , if perpendicular to Fig. 9 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, 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.

[0028] The first sieve holes 22 are provided on both partitions 6, and the primary grinding chamber 501 is connected with the two secondary grinding chambers 502 through the first sieve holes 22. The materials crushed and ground in the primary grinding chamber 501 enter the two secondary grinding chambers 502 through the first sieve holes 22. The side walls of the two secondary grinding chambers 502 are provided with second sieve holes 7, that is, the second sieve holes 7 are provided on the side walls of the inner cylinder 5 corresponding to the secondary grinding chambers 502. The second sieve holes 7 allow the two secondary grinding chambers 502 to communicate with the outer grinding chamber 101, so that the materials crushed and ground in the two secondary grinding chambers 502 can enter the outer grinding chamber 101. The aperture of the first sieve hole 22 is larger than the aperture of the second sieve hole 7, so that the primary grinding chamber 501, the secondary grinding chamber 502, and then the outer grinding chamber 101 form a gradually refined grinding level.

[0029] Grinding media are arranged in the primary grinding chamber 501, the secondary grinding chamber 502 and the outer grinding chamber 101, and the diameter of the primary grinding medium 8 in the primary grinding chamber 501 is larger than the diameter of the secondary grinding medium 9 in the secondary grinding chamber 502, and the diameter of the secondary grinding medium 9 in the secondary grinding chamber 502 is larger than the diameter of the outer grinding medium 11 in the outer grinding chamber 101. The grinding media in the present invention can be steel balls.

[0030] Further, the structure of the outer cylinder 10 and the inner cylinder 5 can be one of the following structures: The first structure: refer to Fig. 9 and Fig.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 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 surfaces corresponding to the two ends of the long axis of the elliptical inner cylinder 5. Fig. 9 and Fig.10 The intersection of the major axis and the minor axis of the inner tube 5 is the center of the inner tube 5, perpendicular to Fig. 9 or Fig.10 The axis at the center of the inner cylinder 5 is the central axis, and the central axis is the rotation axis of the inner cylinder 5 and the outer cylinder 10 .

[0031] The second structural form: reference Fig.21 and Fig. 22 The radial cross section of the outer cylinder 10 may be circular, while the radial cross section of the inner cylinder 5 may be racetrack-shaped. The so-called racetrack-shaped refers to Fig.23 As shown, the left and right side surfaces of the inner cylinder 5 are flat, while the upper and lower end surfaces are arc surfaces. 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 here refers to the long axis surface 503 of the inner cylinder 5. Fig.23 As shown, the two ends of the long axis CZ of the racetrack-shaped inner cylinder 5 correspond to the surfaces. Fig.23 The axis DZ in the middle is the minor axis of the racetrack-shaped inner cylinder 5. Fig.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 Fig.23 The axis at the center of the inner cylinder 5 is the central axis, and the central axis is the rotation axis of the inner cylinder 5 and the outer cylinder 10 .

[0032] 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.

[0033] Further, see Figure 4 , Fig. 9 , Fig.10 , Fig.21 , Fig. 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. Fig.15 A bell-shaped opening 506 can be formed between the two ends of the extended arc surface 505 and the inner wall of the outer cylinder 10, and the bell-shaped opening 506 is connected to 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 for facilitating the entry of materials so that the materials can be further ground through the grinding gap 504.

[0034] Further, see Figure 1-3 , and 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. 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. A supporting leg 2 for supporting is arranged at the bottom of the base 1.

[0035] Furthermore, a hollow tube 4 is rotatably arranged on each of the two brackets 3, and the hollow tube 4 passes through the end side wall of the outer cylinder 10 and is coaxially connected to the inner cylinder 5, and the inner cavity of the hollow tube 4 is connected to the primary grinding chamber 501, and a bearing can be arranged between the hollow tube 4 and the end side wall of the outer cylinder 10 to make the hollow tube 4 and the outer cylinder 10 rotate more smoothly. The hollow tube 4 can be arranged on the bracket 3 through the bearing. The hollow tube 4 can drive the inner cylinder 5 to rotate.

[0036] Further, see 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 tube 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 meshes with the first gear 12. The second gear 14 can be arranged 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 meshes with the second gear 14, and the ring gear 15 is fixedly connected to the outer wall of the end of the outer tube 10. Of course, this is not exhaustive, and any other form of gear matching with equivalent function can also be adopted.

[0037] The motor 16 is used to drive the first gear 12 to rotate. Figure 3 , 5 and 6, a driven pulley 18 is fixedly sleeved 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 convenience of description, the hollow tube 4 fixed to the driven pulley 18 will be referred to as the "active 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 active pulley 23 to rotate, and the active pulley 23 drives the driven pulley 18 to rotate through the transmission belt 17, and the driven pulley 18 drives the "active 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.

[0038] Further, see Figure 10-Figure 14 , a first non-return spring piece 24 may 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 cover 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 preferably not 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 may be located above the rear end of the former first non-return spring piece 24, that is, Fig.12For reference, the "left" in this figure is the front and the "right" is the back. Fig.12 The front end of the first anti-return spring sheet 24 on the right side is located above the rear end of the first anti-return spring sheet 24 on the left side, and a gap is left between the front end of the first anti-return spring sheet 24 on the right side and the rear end of the first anti-return spring sheet 24 on the left side, and the gap is preferably such that the material in the primary grinding chamber 501 is not hindered from moving into the secondary grinding chamber 502. The first anti-return spring sheet 24 can prevent the material in the secondary grinding chamber 502 from flowing back into the primary grinding chamber 501 through the first sieve hole 22, so as to improve the working efficiency. The front end of the next first anti-return spring sheet 24 is located above the rear end of the previous first anti-return spring sheet 24, so that when the opening 241 of the next first anti-return spring sheet 24 is closed, it can overlap the rear end of the previous first anti-return spring sheet 24, so that multiple first anti-return spring sheets 24 form a continuous surface, so as to better prevent the material from flowing back into the primary grinding chamber 501.

[0039] Further preferably, refer to Figure 10-Figure 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-Figure 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. Fig.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-Figure 14 The 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 subjected to 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 Fig.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". Fig.10In the position shown, the first anti-return spring 24 in the "upper secondary grinding chamber" is pressed by the secondary grinding medium 9 and the material, so that the opening 241 of the first anti-return spring 24 is closed, and then the first sieve hole 22 on the partition 6 corresponding to the "upper secondary grinding chamber" is covered 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 medium 9 and the material in the "next secondary grinding chamber" are located at the bottom of the "next secondary grinding chamber", so 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, and there is a gap between the first anti-return spring 24 and the partition 6 corresponding to the "next secondary grinding chamber", and the gap is connected to the first sieve hole 22, and the material that has undergone primary grinding in the primary grinding chamber 501 will pass through the 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 more 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". Fig.11 The 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 Fig.11In 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 medium 9 in the secondary grinding chamber 502 will completely fall to the bottom. At this time, the first anti-return spring 24 that is not pressed by the secondary grinding medium 9 and the material will be reset due to elasticity, that is, the opening 241 of the first anti-return spring 24 will be 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 medium 9 in the secondary grinding chamber 502 will always move along the bottom of the secondary grinding chamber 502 until part of the secondary grinding medium 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 buckled on the first sieve hole 22 of the partition 6, until the inner cylinder 5 rotates to again. Fig.10 At this time, the opening 241 of the first anti-return spring 24 will be gradually pressed and closed.

[0040] 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 arranged 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 with the first rotating shaft 243 as the axis. The characteristic of this structural form is that when the inner cylinder 5 is in Fig.16 When in the position shown, the first anti-return spring piece 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 piece 24 is opened under the action of its own gravity. In order to prevent the opening 241 of the first anti-return spring piece 24 from opening too large, a limiting structure can be provided so that the opening 241 of the first anti-return spring piece 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: Fig.19 and Fig. 20 The structure shown. Fig.19 and Fig. 20, the first rotating shaft 243 is arranged in the rotating shaft sleeve 244, and the rotating shaft sleeve 244 is arranged on the partition 6. A rotating shaft sleeve opening 2441 is formed on one side of the rotating shaft sleeve 244, and the rear end of the first anti-return spring piece 24 extends into the rotating shaft sleeve opening 2441 and is sleeved on the first rotating shaft 243. When the first anti-return spring piece 24 rotates around the first rotating shaft 243, the upper edge 2442 of the rotating shaft sleeve opening can limit the first anti-return spring piece 24 to prevent the opening 241 of the first anti-return spring piece 24 from opening too large. Further, one end of the first anti-return spring piece 24 extending into the rotating shaft sleeve 244 can contact and slide with the inner wall of the rotating shaft sleeve 244. In this way, the first anti-return spring piece 24 can also be further set as an elastic structure.

[0041] Furthermore, the first sieve holes 22 may be arranged in multiple rows, with multiple first sieve holes 22 in each row, so that a first anti-return spring piece 24 may be arranged for each row of the first sieve holes 22, or each first anti-return spring piece 24 may cover multiple rows of the first sieve holes 22, and the arrangement method may be selected as required. In this embodiment, each first anti-return spring piece 24 covers multiple rows of the first sieve holes 22 as an example.

[0042] Furthermore, a plurality of first protrusions 242 may be provided on the back of the first anti-return spring piece 24 to increase 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. Fig.14 The top of the first anti-return spring 24 is shown.

[0043] Further, see Figure 10-Figure 18 , Fig.21 and Fig. 22 The second anti-return spring piece 25 can be arranged on the outer wall of the inner tube 5, and the second anti-return spring piece 25 is arranged 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, that is, Fig.10 For reference, the multiple second non-return springs 25 on the left side of the inner cylinder 5 extend in the same direction, that is, the openings 251 of the multiple second non-return springs 25 on the left side of the inner cylinder 5 face the same direction, while the multiple second non-return springs 25 on the right side of the inner cylinder 5 extend in the same direction, that is, the openings 251 of the multiple second non-return springs 25 on the right side of the inner cylinder 5 face the same direction. In addition, when there are multiple second non-return springs 25, the gap between two adjacent second non-return springs 25 is based on the standard of "not hindering the movement of materials discharged from the secondary grinding chamber 502". The gap between two adjacent second non-return springs 25 mentioned here refers to the shortest distance between two adjacent second non-return springs 25 when the openings 251 of the second non-return springs 25 are opened. The second non-return springs 25 can prevent the materials in the outer grinding chamber 101 from flowing back into the secondary grinding chamber 502 through the second sieve hole 7.

[0044] Furthermore, the opening 251 of the second anti-return spring 25 is in the same direction as the movement direction of the inner tube 5. Fig.10 , Fig.11 and Fig.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. Fig.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". Fig.11 When the second anti-return spring 25 in the "upper outer grinding chamber" is in the position shown, the second anti-return spring 25 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 Fig.11 The state of the second anti-return spring piece 25 on the right side of the "upper outer grinding chamber" is shown in FIG. 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, which can be referred to as Fig.11 At this time, the external grinding medium 11 and materials in the "lower external grinding chamber" are located at the bottom of the "lower external grinding chamber". Therefore, the second non-return spring 25 in the "lower external grinding chamber" is in a natural state, that is, the opening 251 of the second non-return spring 25 is open, and there is a gap between the second non-return spring 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 25 and fall into the "lower external grinding chamber". For details, please refer to Fig.11 The 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 Fig.10In the state shown, 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. In addition, 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 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 Fig.10 The state shown. Fig.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 non-return spring piece 25, which is not pressed by the outer grinding medium 11 and the material, will be reset due to its elasticity, that is, the opening 251 of the second non-return spring piece 25 will be opened, so that the second non-return spring piece 25 will return 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 non-return spring piece 25 in the outer grinding chamber 101, then the opening 251 of the second non-return spring piece 25 will gradually close, so that the second non-return spring piece 25 will gradually be buckled on the second sieve hole 7, until the inner cylinder 5 rotates to the right side again. Fig.11 At this time, the opening 251 of the pressed second anti-return spring 25 will be completely closed.

[0045] In addition, refer to Figure 16-18 , Fig.21 and Fig. 22 The second anti-return spring piece 25 can also be configured as follows: one end of the second anti-return spring piece 25 is disposed 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. The specific structural form can be referred to Fig.19 and Fig. 20 The 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 here. In this form, the second anti-return spring piece 25 itself can also be set as an elastic component.

[0046] Furthermore, a second protrusion may be provided on the outer side of the second anti-return spring 25 , that is, on the side in contact with the outer grinding medium 11 , to enhance the grinding effect.

[0047] Furthermore, the second sieve holes 7 may be arranged in multiple rows, with multiple second sieve holes 7 in each row. Thus, a second anti-return spring sheet 25 may be arranged for each row of second sieve holes 7 , or one second anti-return spring sheet 25 may cover multiple rows of second sieve holes 7 .

[0048] 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.

[0049] The outer cylinder 10 is provided with an opening, and a sealing door 21 is installed at the opening for inspecting the inner condition of the outer cylinder 10 or taking out the ground metal powder particles.

[0050] In addition, a filter plate 26 can be fixedly arranged in one of the hollow tubes 4, and the filter holes on the filter plate 26 can be the same as the second sieve holes 7, which can be used to suck out the formed metal powder after grinding. In addition, an air pipe 20 that can be connected to the inner tube 5 can be arranged on the blocking cover 19, which is used when gas needs to be introduced into the inner tube 5. Of course, it should be noted here that the air pipe 20, the filter plate 26, etc. can be selected and arranged as needed.

[0051] Here, for Fig. 22 For further explanation, Fig. 22 The interior of the inner cylinder 5 in the shape of a middle racetrack 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 way, the first anti-return spring 24 is set as follows Fig. 22 The arc shape shown in the figure can 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, that is, referring to Fig.19 and Fig. 20 The two secondary grinding chambers 502 are preferably symmetrically arranged. For detailed description, refer to Fig. 22 , if perpendicular to Fig. 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.

[0052] Further explanation: The structure, principle, and use process of the present invention are further sorted out in the form of examples with reference to the accompanying drawings. This description is only to combine the above-mentioned multiple preferred methods in an illustrative manner to facilitate a comprehensive description, but this description is not a limitation on the implementation methods of the present application. The description is as follows: 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 .

[0053] The motor 16 is started. After the motor 16 is started, the inner tube 5 and the outer tube 10 rotate relative to each other. Here, the method of "the inner tube 5 and the outer tube 10 rotate simultaneously and in opposite directions" is adopted, and the inner tube 5 is provided with an extended arc surface 505. The first anti-return spring piece 24 is provided on the partition plate 6, and the outer wall of the inner tube 5 is provided with a second anti-return spring piece 25.

[0054] 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. Fig.10 When the inner cylinder 5 is in the position shown, the ground metal particles enter the secondary grinding chamber 502 below the primary grinding chamber 501 through the first sieve hole 22 on the partition 6. As the inner cylinder 5 continues to rotate, the inner cylinder 5 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 hole 7 on the inner cylinder 5. At this time, due to the relative rotation of 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. In this process, the metal powder entering the grinding gap 504 through the trumpet-shaped opening 506 will be ground more finely by the grinding gap 504. Thus, formed metal powder particles are produced.

[0055] In summary, the present invention can crush and grind materials 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.

[0056] 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 understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "fixing" and the like should be understood in a broad sense. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the description of this specification, the description of the terms "embodiment", "further description", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are 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.

[0059] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of 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 in that: It comprises an inner cylinder (5) and an outer cylinder (10); The inner cylinder (5) is arranged inside 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); Two partitions (6) are arranged in the inner cylinder (5) to divide the inner cylinder (5) into a primary grinding chamber (501) and two secondary grinding chambers (502), and the two secondary grinding chambers (502) are arranged on both sides of the primary grinding chamber (501); The two partitions (6) are each provided with a first sieve hole (22), so that the primary grinding chamber (501) is in communication with the two secondary grinding chambers (502); the side walls of the two secondary grinding chambers (502) are provided with a second sieve hole (7), so that the two secondary grinding chambers (502) are in communication 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); Grinding media are arranged in the primary grinding chamber (501), the secondary grinding chamber (502) and the outer grinding chamber (101), and the diameters of the grinding media in the primary grinding chamber (501), the secondary grinding chamber (502) and the outer grinding chamber (101) decrease successively.

2. The metal powder production equipment according to claim 1, characterized in that: The radial cross-section of the outer cylinder (10) is circular, the radial cross-section of the inner cylinder (5) is elliptical, and the inner cylinder (5) is coaxial with the outer cylinder (10); 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).

3. A metal powder production equipment according to claim 2, 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).

4. The metal powder production equipment according to claim 2, characterized in that: It also comprises a base (1); two brackets (3) are fixedly arranged on the base (1); two 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.

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

6. The metal powder production equipment according to claim 5, 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 tube (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 tube (10); the motor (16) is used to drive the first gear (12) to rotate.

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

8. The metal powder production equipment according to claim 1, characterized in that: A first non-return spring sheet (24) is arranged on the partition plate (6) and the first non-return spring sheet (24) is arranged corresponding to the first sieve hole (22); the first non-return spring sheet (24) is arranged on one side located in the secondary grinding chamber (502), and the first non-return spring sheet (24) extends in the direction of the first sieve hole (22) to cover the first sieve hole (22).

9. The metal powder production equipment according to claim 1, characterized in that: A second anti-return spring sheet (25) is provided on the outer side wall of the inner cylinder (5); the second anti-return spring sheet (25) is provided corresponding to the second sieve hole (7) and extends towards the second sieve hole (7) to cover the second sieve hole (7).

10. A metal powder production equipment according to any one of claims 1 to 9, characterized in that: The two secondary grinding chambers (502) are symmetrically arranged.

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