Jet mill for diamond treatment

Abstract

The invention relates to a jet mill for diamond treatment. The jet mill is composed of a raw material conveying mechanism, a plurality of primary crushing mechanisms, a crushing tank and a discharging mechanism. A discharging port of the raw material conveying mechanism is connected to the upper end of the crushing tank of the primary crushing mechanism through a feeding pipe, and the feeding pipe is located above the center rotating cone in the crushing tank. The side end of the rotating cone is provided with containing grooves distributed at equal intervals, and the containing grooves are arranged around the central axis of the rotating cone. After diamond raw materials enter the containing groove, the rotating cone rotates at a high speed to give horizontal thrust to achieve acceleration. A feeding pipe I at the side end of the crushing tank is connected with the crushing tank and the smashing tank, and the containing groove corresponds to the horizontal position of the feeding pipe I. The multiple primary crushing mechanisms are evenly arranged around the crushing tank, accelerated raw materials collide in ascending airflow in the center of the crushing tank, efficient crushing is achieved by means of diamond characteristics, and therefore it is ensured that discharging is even, and the quality and roundness of products are improved.

Description

Technical Field

[0001] The invention relates to the technical field of gas pulverizers, in particular to an air flow pulverizer for diamond processing. Background Art

[0002] In the field of diamond processing, air flow mill is a commonly used equipment, which is mainly composed of a raw material conveying mechanism, a crushing tank and a discharging mechanism. The working principle of the air flow mill in the prior art is: the diamond raw material is transported to the inside of the crushing tank by the raw material conveying mechanism, and settles freely under the action of gravity. Through the air pipe arranged at the lower side of the crushing tank and connected to the crushing tank, a high-speed air flow column is formed at the center of the crushing tank. The air flow column hits the falling diamond raw material to make it fly around. In this process, the diamond raw material hits the inner wall of the crushing tank and the adjacent diamond raw materials hit each other, thereby achieving the crushing and pulverizing effect. The discharging mechanism usually includes a plurality of limit rods as the main filtering mechanism. These limit rods are arranged equidistantly around the same horizontal line. Some diamond raw materials with smaller particle sizes collide with the limit rods when they move upward with the air flow. Those that meet the crushing requirements enter between the limit rods and are discharged from the crushing tank through the discharging pipe; diamond raw materials with larger particle sizes collide with the limit rods and are crushed by force. At the same time, the structure of the limit rods can make the large particle size raw materials stick to the inner wall of the crushing tank and scatter.

[0003] However, the air flow mills in the prior art have many obvious defects. The primary problem is the singleness of the collision process. The entire crushing process mainly relies on the impact of the air flow column on the diamond raw material, as well as its collision with the inner wall of the crushing tank and other raw materials. This single collision mode limits the crushing efficiency of the diamond raw material. Due to the limited collision mode, the diamond raw material cannot be fully impacted in different directions and with different strengths, resulting in some diamond raw materials cannot be effectively crushed. Multiple cycles of crushing are required to achieve a certain particle size requirement, which greatly reduces the crushing efficiency.

[0004] Secondly, the crushing efficiency is low. The single collision process makes the crushing process take a long time, and more time and energy are needed to complete the crushing task. This not only increases production costs, but also reduces production efficiency, which is difficult to meet the urgent needs of large-scale production.

[0005] In addition, the existing technology does not sufficiently modify the diamonds produced, resulting in insufficient roundness of the diamonds produced. During the crushing process, the limitations of the collision method and force make the diamond surface prone to angularity and unevenness, which in turn affects its quality and wide application. For example, in some fields that require high roundness of diamonds, such as jewelry processing and precision grinding, diamonds produced by existing technologies cannot meet the requirements, limiting their market competitiveness.

[0006] In summary, the existing air flow mills used for diamond processing have obvious deficiencies in the collision process, crushing efficiency and diamond modification, and a new technical solution is urgently needed to solve these problems. Summary of the invention

[0007] In view of the shortcomings of the prior art, the present invention proposes an air flow pulverizer for diamond processing. The device significantly improves the crushing efficiency by increasing the number of collisions and impact strength of the diamond raw materials. This effectively solves the problem that the prior art device only relies on the collision of the diamond raw materials with the inner wall of the crushing tank and other raw materials, resulting in low crushing efficiency and a single collision angle.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A pneumatic mill for diamond processing, comprising a raw material conveying mechanism, a crushing tank with an upper and lower axial direction is arranged on one side of the raw material conveying mechanism, an air pipe is arranged on the lower side of the crushing tank, a discharging mechanism is arranged on the upper side of the crushing tank, and a primary crushing mechanism is also included, the number of primary crushing mechanisms is multiple, and the multiple primary crushing mechanisms are arranged equidistantly around the central axis of the crushing tank, each of the primary crushing mechanisms comprises a crushing tank, a rotating cone with a trapezoidal vertical plane projection and an upper and lower axial direction is rotatably connected inside the crushing tank, a driving member is arranged on the upper side of the rotating cone, and each of the rotating cone side ends is penetrated up and down A plurality of accommodating grooves are provided, and the plurality of accommodating grooves are equidistantly arranged around the central axis of the rotating cone, and a feeding pipe I is connected to the side end of each of the crushing tanks, and the feeding pipe I and the accommodating grooves are in the same horizontal plane, and the center line of the projection of the feeding pipe I on the horizontal plane coincides with the tangent line of the projection of the rotating cone on the horizontal plane, and the other axial end of each of the feeding pipe I is connected to the crushing tank, and the intersection of the central axes of the plurality of feeding pipes I on the same horizontal plane coincides with the central axis of the crushing tank, and the discharge port of the raw material conveying mechanism is connected to the upper end of the crushing tank through the feeding pipe, and the feeding pipe is located on the upper side of the rotating cone.

[0010] Preferably, a mounting ring is fixedly connected to the inner cavity of the crushing tank, a plurality of protrusions are arranged on the inner end of the mounting ring, and the protrusions and the accommodating groove are in the same horizontal plane.

[0011] Preferably, each of the crushing tanks is provided with a plurality of rotating cones in the inner cavity, and the plurality of rotating cones are provided with mounting rings and feeding pipes I in combination. Meanwhile, the projection width of the horizontal plane of the accommodating grooves opened at the side ends of the plurality of rotating cones in each of the crushing tanks decreases from top to bottom.

[0012] Preferably, the driving member comprises an upper and lower axial driven shaft, the driven shaft is connected to a plurality of rotating cone keys in each crushing tank, and a driving motor is arranged on the upper side of the driven shaft, and the output shaft of the driving motor is fixedly connected to the driven shaft.

[0013] Preferably, each mounting ring is fixedly connected to a limiting ring at the upper end, the projection diameter of the inner end of the limiting ring on the horizontal plane is smaller than the projection diameter of the rotating cone on the horizontal plane, and the longitudinal section of the limiting ring is a triangular structure, the upper end face of each limiting ring is parallel to the central axis of the corresponding feed pipe, the central axis of each feed pipe is perpendicular to the side end face of the rotating cone, and the central axis of each feed pipe does not overlap with the corresponding limiting ring.

[0014] Preferably, the width of the lower end of each of the receiving grooves is smaller than the width of the upper end thereof, and when the rotating cone rotates, the inclined surface of the side end of each of the receiving grooves applies an oblique upward thrust to the corresponding diamond.

[0015] Preferably, the feeding pipe I includes a receiving pipe connected to the crushing tank, the central axis of the receiving pipe coincides with the tangent of the projection of the horizontal plane of the rotating cone, and the receiving pipe is connected to a contact pipe on the side close to the crushing tank, and the angle between the central axis of the contact tube and the central axis of the receiving pipe is greater than 135° and less than 180°.

[0016] Preferably, the contact tube is located at the lower side of the receiving tube, and the angle between the central axis of the contact tube and the central axis of the receiving tube is greater than 150° and less than 170°.

[0017] Preferably, a plurality of limit grooves are fixedly connected to the inner side of the crushing tank, and the plurality of limit grooves correspond one-to-one to the plurality of primary crushing mechanisms. The projections of the plurality of limit grooves on the horizontal plane do not overlap with the projections of the discharging mechanisms on the horizontal plane. A through groove is provided on the lower side of each of the limit grooves, and the through groove and the corresponding contact tube are in the same vertical plane.

[0018] Preferably, the lower end of each crushing tank is connected to a feeding pipe II, and the feeding pipe II is connected to the lower end of the crushing tank.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention relates to a device for accelerating diamond raw materials by rotating cones in a crushing pot arranged in a vertical direction. The rotating cone is equipped with a driving member, and a plurality of receiving grooves equidistantly surrounding a central axis are provided at its side end. The diamond raw materials fall into the upper side of the rotating cone through a feeding pipe and are guided into the receiving grooves. Under the high-speed rotation of the rotating cone, the diamond raw materials obtain horizontal thrust, which is converted into friction resistance to prevent the diamond raw materials from sliding off the cone, and at the same time effectively accelerate the diamond raw materials. In addition, a plurality of primary crushing mechanisms are evenly distributed around the central axis of the crushing pot, ensuring that the intersection of the central axis of the feeding pipe I on the same horizontal plane coincides precisely with the central axis of the crushing pot. The accelerated diamond raw materials enter the crushing pot from the feeding pipe I and collide with each other at the central axis, i.e., the center of the rising air flow. By utilizing the brittle and hard characteristics of diamond, the diamond raw materials are impacted in different directions and forces at the central position, thereby realizing efficient primary crushing and significantly improving the crushing efficiency. The tiny debris generated by the high-speed impact is entrained by the airflow into the discharging mechanism, ensuring the uniformity of the discharging rate, avoiding abnormal discharging, and enhancing the stability of the production process. At the same time, the comprehensive and uniform impact at the center position helps to improve product quality and roundness, meeting the needs of application areas with high requirements for roundness. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the connection relationship between the discharging mechanism and the crushing tank of the present invention.

[0023] Figure 3 It is a schematic diagram of the connection relationship between the raw material conveying mechanism and the primary crushing mechanism of the present invention.

[0024] Figure 4 It is a schematic diagram of the internal structure of the crushing tank of the present invention.

[0025] Figure 5 It is a schematic diagram of the connection relationship between the driven shaft and the rotating cone of the present invention.

[0026] Figure 6 It is a schematic diagram of the connection relationship between the crushing tank and the mounting ring of the present invention.

[0027] Figure 7 It is a schematic diagram of the matching relationship between the rotating cone and the mounting ring of the present invention.

[0028] Figure 8 It is a schematic diagram of the position relationship between the limit groove rail and the crushing tank of the present invention.

[0029] Fig. 9 It is a schematic diagram of the overall structure of the limiting groove rail of the present invention.

[0030] In the figure: 1. raw material conveying mechanism; 2. primary crushing mechanism; 2101. driving motor; 2102. driven shaft; 22. feeding pipe I; 2201. receiving pipe; 2202. contact pipe; 23. crushing tank; 24. feeding pipe II; 25. protrusion; 26. rotating cone; 27. mounting ring; 28. containing groove; 29. ​​limiting ring; 3. discharging mechanism; 4. crushing tank; 5. air pipe; 6. feeding pipe; 7. limiting groove rail; 8. through groove. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] Please refer to Figure 1 , Figure 2 , an air flow crusher for diamond processing, similar to the prior art device, which is mainly composed of a raw material conveying mechanism 1, a crushing tank 4, and a discharging mechanism 3.

[0034] In practice, the raw diamond material is transported to the inside of the crushing tank 4 by the raw material conveying mechanism 1, and the raw diamond material settles freely in the crushing tank 4 due to the gravity factor. At this time, in combination with the air pipe 5 arranged at the lower side of the crushing tank 4, the air pipe 5 is connected to the crushing tank 4, so that there is a high-speed air flow column at the center position of the crushing tank 4, and the air flow column hits the falling diamond raw material to make it fly around (the position where the air flow hits the diamond raw material determines the force direction of the diamond). In this process, the diamond raw material hits the inner wall of the crushing tank 4 and the adjacent diamond raw materials hit each other, thereby causing the diamond raw material to be crushed and pulverized.

[0035] In addition, if Figure 2As shown, the discharging mechanism 3 includes a plurality of limiting rods as the main filtering mechanism, and the plurality of limiting rods are arranged equidistantly around the same horizontal line, so that the diamond raw materials with smaller particle sizes will hit the limiting rods when they rise with the airflow, and the raw materials that meet the crushing standards will enter between the limiting rods and be discharged from the crushing tank 4 through the discharging pipe arranged on one side of the limiting rod and connected to the inner cavity of the limiting rod. Correspondingly, when the diamond raw materials with larger particle sizes hit the limiting rods during the upward movement of the airflow, they will be crushed by force, forming a unique crushing effect. In addition, the limiting rods arranged in an annular manner and their cylindrical structure can change the upward thrust of the diamond raw materials with larger particle sizes, so that they are close to the inner wall of the crushing tank 4, achieving a dispersion effect.

[0036] It is worth noting that Figure 2 As shown, a positioning plate is fixedly disposed at each axial end of the plurality of limit rods, and the positioning plate is rotatably connected to the crushing tank 4. The positioning plate not only fixes the discharging mechanism 3, but also allows the limit rods to form a freely rotatable whole. When the diamond raw material with a larger particle size hits the limit rod, the overall rotation can reduce the curbing of the raw material speed and increase the offset effect, thereby enhancing the collision speed between the raw material and the inner wall of the crushing tank 4 and accelerating the crushing speed.

[0037] Please refer to Figure 1 , Figure 3 Compared with the prior art device, the present application adds a plurality of primary crushing mechanisms 2. The diamond raw material enters the primary crushing mechanism 2 via the conveying mechanism and then enters the inner wall of the crushing tank 4 for crushing.

[0038] Please refer to Figure 3 , Figure 4 Specifically, each primary crushing mechanism 2 includes a crushing pot 23 with an upper and lower axial direction, and a rotating cone 26 with an upper and lower axial direction is rotatably connected inside the crushing pot 23.

[0039] It is worth noting that a driving component is disposed on the upper side of the rotating cone 26 , and the driving component can drive the rotating cone 26 to rotate at a high speed.

[0040] At the same time, if Figure 5 As shown, a plurality of receiving grooves 28 are provided through the upper and lower sides of each rotating cone 26, and the plurality of receiving grooves 28 are arranged equidistantly around the central axis of the rotating cone 26. This, combined with the gravity potential energy of the diamond raw material itself, enables the diamond raw material located inside the receiving groove 28 to obtain a horizontal thrust during the high-speed rotation of the rotating cone 26. At this time, the thrust is converted into a friction resistance between the diamond raw material and the rotating cone 26 to prevent the raw material from continuing to fall. At the same time, combined with the limiting effect of the inner wall of the crushing tank 23 on the diamond raw material, the diamond raw material can continue to rotate at high speed in the fixed receiving groove 28 following the rotating cone 26.

[0041] Furthermore, each rotating cone 26 is projected into a trapezoid on the vertical plane. This design enhances the adaptability of the device to the diamond particle size, ensuring that even diamond raw materials with larger particle sizes can smoothly enter the gap between the rotating cone 26 and the inner wall of the crushing tank 23. At this time, combined with the self-weight of the diamond raw materials and the downward pressure generated by the accumulation of other diamond raw materials, the diamond raw materials can have a continuous downward movement trend. At this time, it can be fully guaranteed that the diamond raw materials can enter the interior of the receiving groove 28.

[0042] Furthermore, the device can be provided with a plurality of rotating cones 26 in the inner cavity of each crushing tank 23. The projection width of the receiving groove 28 opened at the side end of the multiple rotating cones 26 in the horizontal plane gradually decreases from top to bottom, which can form a multi-level receiving structure, that is, it can avoid that a large number of diamond raw materials are stuck near a single rotating cone 26 at the same time and affect the subsequent raw materials entering the crushing tank 23, and can fully ensure that the device can adapt to diamond raw materials of various particle sizes, and avoid diamond raw materials with larger particle sizes from falling directly and continuously downward.

[0043] It is worth noting that Figure 1 , Figure 3 As shown, the raw material conveying mechanism 1 is an auger conveying mechanism, which allows the diamond raw material to enter the crushing tank 23 in a relatively uniform and moderate state, which can fully ensure that the input speed of the diamond raw material meets the requirements and avoid the accumulation of diamond raw material on the rotating cone 26.

[0044] Further, such as Figure 4 , Figure 6 In order to prevent the diamond raw material from bouncing due to hitting the side end of the rotating cone 26 and ensure that it can quickly enter the containing groove 28 and rotate with the rotating cone 26, the device constrains the discharge port of the raw material conveying mechanism 1 to be connected to the upper end of the crushing tank 4 through the feeding pipe 6. The feeding pipe 6 is located on the upper side of the rotating cone 26, and the central axis of each feeding pipe 6 is perpendicular to the side end face of the rotating cone 26. This ensures that when the diamond raw material falls and hits the side end of the rotating cone 26, the impact force exerted on the rotating cone 26 can be fully applied to the side end of the rotating cone 26, thereby minimizing the bouncing of the diamond raw material.

[0045] In addition, if Figure 6 , Figure 7As shown, the device is further provided with a mounting ring 27 for each rotating cone 26 inside the crushing tank 23, and the upper end of the mounting ring 27 is coaxially fixedly connected to a limiting ring 29, the longitudinal section projection of the limiting ring 29 is a triangular structure, and the inclination angle of the upper end face of the limiting ring 29 is parallel to the central axis of the feed pipe 6, that is, the inclination angle of the upper end face of the limiting ring 29 forms a ninety-degree angle with the side end of the rotating shaft, which further increases the friction resistance of the diamond raw material when it falls through the limiting ring 29, thereby slowing down its falling speed, and at the same time, further realizing the constraint on the falling trajectory of the diamond raw material, ensuring that the diamond raw material can vertically impact the side end face of the rotating cone 26, thereby fully reducing the value of the component force generated by the diamond raw material impacting the side end of the rotating cone 26.

[0046] Accordingly, the device is designed so that the central axis of each feed tube 6 does not overlap with the corresponding limit ring 29, thereby effectively preventing the feed tube 6 and the limit ring 29 from conflicting with the constraints on the diamond raw material, ensuring that the diamond raw material can smoothly slide from the feed tube 6 to the side end of the rotating cone 26.

[0047] Please refer to Figure 1 , Figure 3 , Figure 4 Specifically, in order to allow the diamond raw material to enter the crushing tank 4 from the crushing tank 23, the device is provided with a feeding pipe Ⅰ22 at the side end of each crushing tank 23 for the rotating cone 26, and the two axial ends of the feeding pipe Ⅰ22 are respectively connected to the crushing tank 23 and the crushing tank 4. At this time, by ensuring that the receiving groove 28 at the side end of each rotating cone 26 is aligned with the feeding pipe Ⅰ22 on the same horizontal plane, and the projection center line of the feeding pipe Ⅰ22 on the horizontal plane coincides with the tangent line of the rotating cone 26, the technical goal of smoothly transferring the diamond raw material from the crushing tank 23 to the crushing tank 4 is achieved.

[0048] It should be noted that if Figure 1 As shown, the raw material conveying mechanism 1 and the feeding pipe Ⅰ22 are respectively located on both sides of the crushing tank 23. Therefore, in practice, the raw material conveyed by the raw material conveying mechanism 1 into the crushing tank 23 falls downward into the receiving groove 28, and then continues to rotate with the rotating cone 26 inside the receiving groove 28 until the diamond raw material moves to the connection between the feeding pipe Ⅰ22 and the crushing tank 23. Since an opening is provided here, the diamond raw material loses the necessary shielding when moving to this place, and the diamond raw material can enter the crushing tank 4 through the feeding pipe Ⅰ22.

[0049] Therefore, the device constrains multiple primary crushing mechanisms 2 to be arranged equidistantly around the central axis of the crushing tank 23, so that the central axis of the feed pipe I 22 on the same horizontal plane intersects with the central axis of the crushing tank 4, ensuring that the diamond raw materials, after being accelerated by the rotating cone 26, directly enter the crushing tank 4 and collide with each other. At this time, the brittle and hard characteristics of the diamond raw materials themselves can be used to achieve the primary crushing process of the diamond raw materials. At the same time, the brittle and hard characteristics of the diamond raw materials themselves can cause the diamond raw materials to produce more tiny diamond debris during the high-speed collision process. These debris are brought into the discharging mechanism 3 by the airflow, ensuring a stable discharging rate and avoiding the problem of uneven discharging.

[0050] Note: Please refer to Figure 1 , Figure 3 , Figure 4 In order to avoid the waste of diamond raw materials deposited at the bottom of the crushing tank 23, each crushing tank 23 is connected to a downwardly inclined feeding pipe II 24 (such as Figure 3 ), at this time, combined with the characteristic that the feed pipe II 24 is connected to the lower end of the crushing tank 4, the diamond raw material not affected by the rotating cone 26 can enter the lower end of the crushing tank 4 through the feed pipe II 24, thereby combining with the rising airflow.

[0051] It is additionally emphasized that, in actual applications, the ingenious design of the multi-stage rotating cone 26, combined with the characteristic that the receiving groove 28 opened at the side end of each rotating cone 26 gradually decreases from top to bottom in horizontal plane projection, ensures that only diamond raw materials with smaller particle sizes can smoothly enter the crushing tank 4 through the feeding pipe II 24. Combined with the position where they enter the inside of the crushing tank 4, it can be seen that these diamond raw materials with reduced particle sizes move upward under the drive of the rising air flow and collide with the diamond raw materials entering the crushing tank 4 from the feeding pipe I 22. This process can make the diamond raw materials inside the crushing tank 4 have collision angles in multiple directions, which can effectively improve the crushing efficiency and make this part of the diamond raw materials with smaller particle sizes become more rounded and smaller in particle size, which is more in line with the crushing requirements of diamond processing.

[0052] It should be noted that if Figure 3 , Figure 4 As shown, the conveying component described in the present application includes a dynamic component including an upper and lower axial driven shaft 2102, the driven shaft 2102 is key-connected to multiple rotating cones 26 in each crushing tank 23, a driving motor 2101 is arranged on the upper side of the driven shaft 2102, the output shaft of the driving motor 2101 is fixedly connected to the driven shaft 2102, and the driven shaft 2102 is driven to rotate by the driving motor 2101, thereby making the multiple rotating cones 26 rotate synchronously in the crushing tank 23. This design not only reduces the failure rate of the device, but also effectively reduces energy loss.

[0053] Further, such as Figure 4As shown, the feeding pipe Ⅰ22 of the device includes a receiving pipe 2201 connected to the crushing tank 23, and the central axis of the receiving pipe 2201 coincides with the tangent line of the horizontal plane projection of the rotating cone 26.

[0054] At the same time, the receiving tube 2201 is connected to the contact tube 2202 on the side close to the crushing tank 4, and the angle between the central axis of the contact tube 2202 and the central axis of the receiving tube 2201 is greater than 135° and less than 180°. In this way, the contact tube 2202 can be used to constrain the movement trajectory of the diamond raw material. After the diamond raw material enters the contact tube 2202 through the receiving tube 2201, its movement direction is parallel to the central axis of the receiving tube 2201, but does not coincide with the central axis of the contact tube 2202, so it will hit the inner wall of the contact tube 2202. At this time, combined with the characteristics of the high-speed movement of the diamond raw material, it can be achieved The rotation of the diamond raw material (the kinetic energy carried by the diamond raw material itself will generate a component force in an additional direction when it contacts the inclined surface of the inner wall of the contact tube 2202, and this component force can cause the rotation of the diamond raw material). In this way, the diamond raw material entering the crushing tank 4 through the contact tube 2202 will collide with each other on the central axis to produce debris, which will have a greater oblique movement tendency due to the centrifugal force. This helps to increase the coverage of the diamond raw material that does not always move upward with the airflow in the crushing tank 4, so that it can better collide with the original diamond raw material inside the crushing tank 4, thereby improving the crushing efficiency.

[0055] Furthermore, the device constrains the contact tube 2202 to be located at the lower side of the receiving tube 2201, which can combine the gravitational potential energy of the diamond raw material itself to avoid curbing the movement speed of the diamond raw material as much as possible.

[0056] Furthermore, the device constrains the angle between the central axis of the contact tube 2202 and the central axis of the receiving tube 2201 to be greater than 150° and less than 170°, which is intended to minimize the resistance exerted by the contact tube 2202 on the diamond raw material in the horizontal direction, thereby avoiding slowing down the movement speed of the diamond raw material.

[0057] Further, such as Figure 6 , Figure 7 As shown, the device is also provided with a plurality of protrusions 25 on the inner side end of the mounting ring 27, and the protrusions 25 are in the same horizontal plane as the receiving groove 28. When the rotating cone 26 rotates, the diamond raw material moves in the receiving groove 28 and collides with the protrusions 25 on the mounting ring 27, thereby achieving preliminary crushing of the diamond raw material.

[0058] It is worth noting that the primary crushing of the diamond raw material by the protrusion 25 can prevent the diamond raw material with a particularly large particle size from being squeezed and stuck into the receiving groove 28, and prevent the rotating cone 26 from losing its function.

[0059] It should be noted that, in practice, by utilizing the continuous collision between multiple protrusions 25 and the diamond raw material, the brittle and hard characteristics of the diamond raw material itself can be utilized to achieve the modification of the protruding corners of the diamond raw material. This can increase the production of small-particle diamond raw materials, ensure the crushing effect, and make the diamond raw materials entering the crushing tank 4 have a relatively uniform particle size and a relatively rounded shape. This can ensure that the impact force carried by the diamond raw materials impacting the central axis of the crushing tank 4 is roughly equal, thereby achieving the maximum crushing efficiency. At the same time, this makes the overall crushing time relatively controllable, which is convenient for the operator to grasp the operation time.

[0060] In addition, the continuous cooperation of the plurality of protrusions 25 and the layout of the plurality of rotating cones 26 in the device can effectively prevent a single long diamond raw material from passing through the receiving groove 28 and entering the crushing tank 4, thereby ensuring

[0061] Furthermore, the present device constrains the lower width of each receiving groove 28 to be smaller than the upper width thereof. This utilizes the inclined plane at the side end of the receiving groove 28 so that when the rotating cone 26 rotates, the inclined surface at the side end of each receiving groove 28 can apply an oblique upward thrust to the corresponding diamond. This can prevent the diamond raw material from being affected by gravity and getting stuck between the protrusion 25 and the rotating cone 26 (when it is stuck between the gaps, the horizontal force exerted by the rotating cone 26 on the diamond raw material, combined with the relative movement between the rotating cone 26 and the diamond raw material, can utilize the inclined surface at the lower end of the receiving groove 28 to move the diamond raw material with a larger particle size upward), thereby effectively reducing the failure rate of the present device.

[0062] Accordingly, the receiving groove 28 can provide an upward thrust for the diamond raw material with a larger particle size. To prevent the diamond raw material from bouncing too high and affecting the subsequent diamonds entering the receiving groove 28, Figure 7 As shown, the device effectively restricts the bouncing height of the diamond raw material in the receiving groove 28 by adjusting the distance between the limit ring 29 and the protrusion 25 and utilizing the characteristics of the triangular longitudinal section of the limit ring 29 and the characteristic that the inner horizontal projection diameter of the limit ring 29 is smaller than the rotating cone 26.

[0063] Please refer to Figure 8 , Fig. 9Furthermore, the device is fixedly connected with a plurality of limit groove rails 7 on the inner side of the crushing tank 4, and the plurality of limit groove rails 7 correspond to the plurality of primary crushing mechanisms 2 one by one. At the same time, a through groove 8 is penetrated and opened on the lower side of each limit groove rail 7, and the through groove 8 and the corresponding contact tube 2202 are in the same vertical plane. This can make the diamond raw material enter the crushing tank 4 through the feeding pipe Ⅰ22, and collide with the diamond raw material falling after hitting the discharging mechanism 3, and can apply a horizontal thrust to it, so that it moves to the vicinity of the rising air flow, which can realize the constraint of the position of the diamond raw material inside the crushing tank 4, so that it is mainly limited to the vicinity of the central axis of the crushing tank 4 and to the same height of the feeding pipe Ⅰ22, which can increase the number of collisions between a single diamond raw material and the surrounding diamond raw materials per unit time, thereby enhancing the collision intensity and improving the crushing efficiency.

[0064] Accordingly, if Fig. 9 As shown, the width of the upper end of each limiting groove 7 is smaller than the width of the lower end, and each limiting groove 7 is in a convergent state from top to bottom. This can fully realize the constraint of the position of the falling diamond raw material by utilizing its own physical structure characteristics, so that it can be enriched at the connection position between the feeding pipe Ⅰ22 and the crushing tank 4, which can ensure that most of the diamond raw materials enter the central axis position of the crushing tank 4 after collision, and can also ensure that most of the diamond raw materials collide once at the position of the through groove 8.

[0065] It should be noted that the design of this device ensures that the projections of the multiple limit grooves 7 and the discharge mechanism 3 (limit rod) on the horizontal plane do not overlap each other, so as to prevent interference with the rising airflow and ensure that the small-diameter diamonds that meet the requirements can smoothly enter the discharge mechanism 3. At the same time, this design maximizes the positive circulation of the diamond raw materials. The raw materials first collide near the rising airflow, then hit the discharge mechanism 3, and scatter down, thereby fully completing the collision process.

[0066] The present invention is used in practical applications:

[0067] Primary crushing stage

[0068] Raw materials enter the crushing tank 23: Diamond raw materials pass through the auger conveying mechanism (raw material conveying mechanism 1) and enter the crushing tank 23 through the feed pipe 6. The feed pipe 6 is located on the upper side of the rotating cone 26, and the central axis is perpendicular to the side end face of the rotating cone 26. The limit ring 29 further restricts the falling trajectory of the raw materials, so that the raw materials vertically hit the side end of the rotating cone 26 to reduce bouncing.

[0069] Entering the receiving groove 28 and accelerating: After the diamond raw material hits the side end of the rotating cone 26, it enters the receiving groove 28 at the side end of the rotating cone 26. The rotating cone 26 is driven by the driven shaft 2102 driven by the driving motor 2101 to rotate at a high speed, thereby providing a horizontal thrust for the diamond raw material in the receiving groove 28 to gain speed.

[0070] Primary crushing by collision with the protrusions 25: During the rotation of the rotating cone 26, the diamond raw material continuously collides with the multiple protrusions 25 on the inner end of the mounting ring 27. By increasing the collision frequency and utilizing the brittle and hard characteristics of the diamond raw material, the protruding corners are modified to complete the primary crushing. This process not only prevents the large-sized raw material from getting stuck in the receiving groove 28, but also makes the raw material entering the crushing tank 4 have a relatively uniform particle size and a relatively rounded shape. At the same time, the receiving groove 28 is designed to have a structure in which the lower end is narrower than the upper end, which effectively prevents the raw material from getting stuck in the gap between the protrusion 25 and the rotating cone 26 due to gravity. At the same time, the setting of the limit ring 29 limits the bouncing amplitude of the raw material in the receiving groove 28.

[0071] Entering crushing tank 4 and secondary crushing stage

[0072] Entering the crushing tank 4 through the feeding pipe: When the rotating cone 26 drives the diamond raw material to move to the connection between the feeding pipe I 22 and the crushing tank 23, the raw material enters the crushing tank 4 through the feeding pipe I 22. The feeding pipe I 22 includes a receiving pipe 2201 and a contact pipe 2202. The central axis of the receiving pipe 2201 coincides with the tangent of the horizontal plane projection of the rotating cone 26. The central axis of the contact pipe 2202 and the central axis of the receiving pipe 2201 have an angle greater than 150° and less than 170°, and are located at the lower side of the receiving pipe 2201. Before entering the contact pipe 2202, the diamond raw material first passes through the receiving pipe 2201. Since the movement direction of the raw material is consistent with the central axis of the receiving pipe 2201, but there is a deviation from the central axis of the contact pipe 2202, it will hit the inner wall of the contact pipe 2202. Due to its high-speed movement characteristics, when the diamond raw material hits the inclined surface of the inner wall of the contact pipe 2202, its kinetic energy is converted into an additional directional component force, prompting the raw material to start rotating.

[0073] Secondary collision crushing: After the rotating diamond raw material enters the crushing tank 4 through the feeding pipe Ⅰ22, it is secondarily collided and crushed with the diamond raw material originally falling inside the crushing tank 4 near the through groove 8 on the lower side of the limit groove rail 7. The limit groove rail 7 corresponds to the primary crushing mechanism 2 one by one, and its upper end width is smaller than the lower end width, and it is in a convergent state from top to bottom, which can constrain the position of the falling raw material and make it enriched at the connection position between the feeding pipe Ⅰ22 and the crushing tank 4. During the rotating collision process of the diamond raw material, the secondary crushing effect is significantly improved by increasing the collision angle and strength.

[0074] Three collision fragmentation stages

[0075] After the secondary collision and crushing, the diamond raw materials continue to move horizontally to the central axis area of ​​the crushing tank 4, and collide and crush with more raw materials for the third time. At the same time, the diamond raw materials that did not participate in the collision and crushing in the secondary collision stage and still maintained a rotating state are scattered and crushed in the process of moving toward the central axis of the crushing tank 4. This rotating and scattered state greatly increases the probability of collision with the surrounding diamond raw materials, allowing more raw materials to participate in the three-collision crushing process. Multiple primary crushing mechanisms 2 are evenly distributed around the central axis of the crushing tank 4, ensuring that the raw materials entering from different feeding pipes can effectively collide on the central axis, thereby further improving the efficiency of the three-collision crushing.

[0076] Collision with discharge mechanism 3 and four crushing stages

[0077] After three collisions and crushing, the diamond raw materials move upward and hit the discharging mechanism 3 (composed of multiple limit rods). Some diamond raw materials with smaller particle sizes and meeting the requirements enter between the limit rods and are discharged from the crushing tank 4 through the discharging pipe; the diamond raw materials that do not enter the discharging mechanism 3 are crushed by the limit rods for four collisions. Positioning plates are fixed to the two axial ends of the multiple limit rods, respectively, so that the limit rods can rotate freely as a whole, reducing the curbing effect on the raw material speed and increasing the offset effect.

[0078] Five collision fragmentation stages

[0079] The diamond raw material after four collisions and crushing is deflected by the discharging mechanism 3 and moves toward the inner wall of the crushing tank 4, and is collided and crushed five times with the inner wall of the crushing tank 4. Subsequently, the raw material continues to circulate in the crushing tank 4 until the predetermined discharging standard is met.

[0080] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air flow mill for diamond processing, comprising a raw material conveying mechanism (1), wherein one side of the raw material conveying mechanism (1) is provided with a crushing tank (4) in an upper and lower axial direction, and an air pipe (5) is provided at the lower side of the crushing tank (4), and a discharging mechanism (3) is provided at the upper side of the crushing tank (4), characterized in that: It also includes a primary crushing mechanism (2), wherein the number of the primary crushing mechanisms (2) is multiple, and the multiple primary crushing mechanisms (2) are arranged equidistantly around the central axis of the crushing tank (4); Each of the primary crushing mechanisms (2) comprises a crushing tank (23), wherein a rotating cone (26) having a trapezoidal vertical projection and an upper and lower axial direction is rotatably connected inside the crushing tank (23), and a driving member is arranged on the upper side of the rotating cone (26); A plurality of receiving grooves (28) are formed through the upper and lower sides of each rotating cone (26), and the plurality of receiving grooves (28) are arranged equidistantly around the central axis of the rotating cone (26). Furthermore, a feeding pipe I (22) is connected to the side end of each crushing tank (4), and the feeding pipe I (22) and the receiving grooves (28) are located in the same horizontal plane, and the center line of the projection of the feeding pipe I (22) on the horizontal plane coincides with the tangent line of the projection of the rotating cone (26) on the horizontal plane. The other axial end of each of the feed pipes I (22) is connected to the crushing tank (4), and the intersection of the central axes of the plurality of feed pipes I (22) on the same horizontal plane coincides with the central axis of the crushing tank (4); The discharge port of the raw material conveying mechanism (1) is connected to the upper end of the crushing tank (4) through a feed pipe (6), and the feed pipe (6) is located on the upper side of the rotating cone (26).

2. The air flow mill for diamond processing according to claim 1, characterized in that: The inner cavity of the crushing tank (23) is fixedly connected to a mounting ring (27), and the inner end of the mounting ring (27) is provided with a plurality of protrusions (25), and the protrusions (25) and the containing grooves (28) are located at the same horizontal plane.

3. The air flow mill for diamond processing according to claim 2, characterized in that: A plurality of rotating cones (26) are arranged in the inner cavity of each crushing tank (23), and the plurality of rotating cones (26) are matched with mounting rings (27) and a feeding pipe I (22). At the same time, the horizontal projection width of the receiving grooves (28) opened at the side ends of the plurality of rotating cones (26) in each crushing tank (23) decreases from top to bottom.

4. The air flow mill for diamond processing according to claim 3, characterized in that: The driving component comprises a driven shaft (2102) in an upper and lower axial direction, the driven shaft (2102) being key-connected to a plurality of rotating cones (26) in each crushing tank (23), and a driving motor (2101) is arranged on the upper side of the driven shaft (2102), and an output shaft of the driving motor (2101) is fixedly connected to the driven shaft (2102).

5. The air flow mill for diamond processing according to claim 3, characterized in that: The upper end of each mounting ring (27) is fixedly connected to a limiting ring (29), the projection diameter of the inner side end of the limiting ring (29) on a horizontal plane is smaller than the projection diameter of the rotating cone (26), and the longitudinal section of the limiting ring (29) is a triangular structure, and the upper end surface of each limiting ring (29) is parallel to the central axis of the corresponding feed pipe (6); The central axis of each feed pipe (6) is perpendicular to the side end surface of the rotating cone (26), and the central axis of each feed pipe (6) does not overlap with the corresponding limiting ring (29).

6. The air flow mill for diamond processing according to claim 3, characterized in that: The width of the lower end of each receiving groove (28) is smaller than the width of the upper end thereof, and when the rotating cone (26) rotates, the inclined surface of the side end of each receiving groove (28) applies an oblique upward thrust to the corresponding diamond.

7. The air flow mill for diamond processing according to claim 3, characterized in that: The feeding pipe I (22) comprises a receiving pipe (2201) connected to the crushing tank (23), the central axis of the receiving pipe (2201) coincides with the tangent of the horizontal plane projection of the rotating cone (26), and the receiving pipe (2201) is connected to a contact pipe (2202) on the side close to the crushing tank (4), and the angle between the central axis of the contact pipe (2202) and the central axis of the receiving pipe (2201) is greater than 135° and less than 180°.

8. The air flow mill for diamond processing according to claim 7, characterized in that: The contact tube (2202) is located at the lower side of the receiving tube (2201), and the angle between the central axis of the contact tube (2202) and the central axis of the receiving tube (2201) is greater than 150° and less than 170°.

9. The air flow mill for diamond processing according to claim 1, characterized in that: A plurality of limit groove rails (7) are fixedly connected to the inner side of the crushing tank (4), the plurality of limit groove rails (7) correspond to the plurality of primary crushing mechanisms (2) one by one, and the projections of the plurality of limit groove rails (7) on the horizontal plane do not overlap with the projections of the discharging mechanism (3) on the horizontal plane; A through slot (8) is provided through the lower side of each of the limiting groove rails (7), and the through slot (8) and the corresponding contact tube (2202) are located in the same vertical plane.

10. The air flow mill for diamond processing according to claim 1, characterized in that: The lower end of each crushing tank (23) is connected to a feeding pipe II (24), and the feeding pipe II (24) is connected to the lower end of the crushing tank (4).

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