An air jet mill for diamond processing

Abstract

The present invention relates to a jet mill for diamond processing, which is composed of a raw material conveying mechanism, a plurality of primary crushing mechanisms, a crushing tank and a discharging mechanism. The 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 feed pipe, and this feed pipe is located above the central rotating cone in the crushing tank. Equally spaced receiving grooves are provided on the side end of the rotating cone, and these receiving grooves are arranged around its central axis. After the diamond raw materials enter the receiving grooves, the high-speed rotation of the rotating cone gives them a horizontal thrust to achieve acceleration. The feeding pipe Ⅰ on the side end of the crushing tank connects the crushing tank and the crushing chamber, and the receiving grooves correspond to the horizontal position of the feeding pipe Ⅰ. A plurality of primary crushing mechanisms are evenly arranged around the crushing chamber. The accelerated raw materials collide in the upward air flow at the center of the crushing chamber, and high-efficiency crushing is achieved by virtue of the characteristics of diamonds, thereby ensuring uniform discharging and improving the quality and roundness of the products.

Description

Technical Field

[0001] The present invention relates to the technical field of gas pulverizers, and particularly to a pneumatic pulverizer for diamond processing. Background Art

[0002] In the field of diamond processing, a pneumatic pulverizer is a commonly used device, which mainly consists of a raw material conveying mechanism, a pulverizing tank, and a discharging mechanism. The working principle of the pneumatic pulverizer in the prior art is as follows: diamond raw materials are transported by the raw material conveying mechanism to the inside of the pulverizing tank and freely settle under the action of gravity. Through a gas pipe arranged on the lower side of the pulverizing tank and connected to the pulverizing tank, an air flow column with high-speed flow is formed at the central position inside the pulverizing tank. The air flow column impacts the falling diamond raw materials, causing them to scatter in all directions. During this process, the diamond raw materials collide with the inner wall of the pulverizing tank and with each other, thereby achieving the effect of crushing and pulverizing. The discharging mechanism usually includes a plurality of limiting rods as the main filtering mechanism. These limiting rods are arranged equidistantly around the same horizontal line. When some diamond raw materials with smaller particle sizes move upward along with the air flow and impact the limiting rods, those meeting the pulverizing requirements enter between the limiting rods and are then discharged from the pulverizing tank through a discharge pipe; the diamond raw materials with larger particle sizes are broken when they impact the limiting rods, and at the same time, the structure of the limiting rods allows the large-particle-size raw materials to adhere to the inner wall of the pulverizing tank and scatter.

[0003] However, the pneumatic pulverizer in the prior art has many obvious defects. The primary problem lies in the singularity of the collision process. The entire pulverizing process mainly relies on the impact of the air flow column on the diamond raw materials and their collision with the inner wall of the pulverizing tank and other raw materials. This single collision mode limits the pulverizing efficiency of the diamond raw materials. Due to the limited collision methods, the diamond raw materials cannot be fully impacted in different directions and with different forces, resulting in some diamond raw materials not being effectively pulverized and requiring multiple cycles of pulverization to meet certain particle size requirements, greatly reducing the pulverizing efficiency.

[0004] Secondly, the pulverizing efficiency is low. The single collision process makes the pulverizing process time-consuming and requires more time and energy to complete the pulverizing task. This not only increases the production cost but also reduces the production efficiency, making it difficult to meet the urgent needs of large-scale production.

[0005] In addition, the existing technology does not modify the produced diamonds enough, resulting in insufficient roundness of the produced diamonds. During the pulverizing process, the limitations of the collision method and force cause the surface of the diamonds to be prone to generating edges and unevenness, thereby affecting their quality and application scope. For example, in some fields with high requirements for the roundness of diamonds, such as jewelry processing and precision grinding, the diamonds produced by the existing technology cannot meet the requirements, restricting their market competitiveness.

[0006] In summary, the existing jet mills for diamond treatment have obvious deficiencies in aspects such as the collision process, crushing efficiency, and diamond modification. There is an urgent need for a new technical solution to solve these problems. Summary of the Invention

[0007] Aiming at the deficiencies existing in the prior art, the present invention proposes a jet mill for diamond treatment. By increasing the number of collisions and the impact force of diamond raw materials, the crushing efficiency of this device is significantly improved. This effectively solves the problems of the prior art device that only relies on the collision of 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] To achieve the above objectives, the present invention adopts the following technical solutions:

[0009] A jet mill for diamond treatment includes a raw material conveying mechanism. On one side of the raw material conveying mechanism, there is a vertically axially arranged crushing tank. And, a trachea is provided on the lower side of the crushing tank, and a discharging mechanism is provided on the upper side of the crushing tank. It also includes a primary crushing mechanism. The number of primary crushing mechanisms is multiple, and multiple primary crushing mechanisms are arranged equidistantly around the central axis of the crushing tank. Each primary crushing mechanism includes a crushing tank. Inside the crushing tank, there is a vertically axially arranged rotating cone whose vertical plane projection is trapezoidal. A driving member is provided on the upper side of the rotating cone. Multiple receiving grooves are vertically penetrated through the side end of each rotating cone, and multiple receiving grooves are arranged equidistantly around the central axis of the rotating cone. And, a feeding pipe Ⅰ is connected to the side end of each crushing tank. The feeding pipe Ⅰ is in the same horizontal plane as the receiving groove. The center line of the horizontal plane projection of the feeding pipe Ⅰ coincides with the tangent of the horizontal plane projection of the rotating cone. The other axial end of each feeding pipe Ⅰ is connected to the crushing tank. And, the intersection of the central axes of multiple feeding pipes Ⅰ in the same horizontal plane coincides with the central axis of the crushing tank. The discharging port of the raw material conveying mechanism is connected to the upper end of the crushing tank through a feeding pipe, and the feeding pipe is located above the rotating cone.

[0010] Preferably, an installation ring is fixedly connected to the inner cavity of the crushing tank. Multiple protrusions are provided at the inner side end of the installation ring. And, the protrusions are in the same horizontal plane as the receiving groove.

[0011] Preferably, a plurality of rotating cones are provided in the inner cavity of each crushing tank. And, a plurality of rotating cones are provided with an installation ring and a feeding pipe Ⅰ. At the same time, the width of the horizontal plane projection of the receiving grooves opened at the side ends of the plurality of rotating cones in each crushing tank decreases from top to bottom.

[0012] Preferably, the driving member includes a vertically axially arranged driven shaft. The driven shaft is key-connected to a plurality of rotating cones in each crushing tank. And, a driving motor is provided on the upper side of the driven shaft. The output shaft of the driving motor is fixedly connected to the driven shaft.

[0013] Preferably, a limiting ring is fixedly connected to the upper end of each of the mounting rings. The diameter of the horizontal plane projection of the inner side end of the limiting ring is smaller than the diameter of the horizontal plane projection of the rotary cone. Moreover, the longitudinal section of the limiting ring is of a triangular structure. The upper end surface 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 surface of the rotary cone, and the central axis of each feed pipe does not coincide 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 its upper end. Moreover, when the rotary cone rotates, the inclined surface at the side end of each of the receiving grooves applies an obliquely upward thrust to the corresponding diamond.

[0015] Preferably, the feed pipe I includes a connecting pipe communicating with the crushing tank. The central axis of the connecting pipe coincides with the tangent of the horizontal plane projection of the rotary cone. Moreover, a contact pipe is connected to the side of the connecting pipe close to the crushing tank. The included angle between the central axis of the contact pipe and the central axis of the connecting pipe is greater than 135° and less than 180°.

[0016] Preferably, the contact pipe is located below the connecting pipe. The included angle between the central axis of the contact pipe and the central axis of the connecting pipe is greater than 150° and less than 170°.

[0017] Preferably, a plurality of limiting groove rails are fixedly connected to the inner side of the crushing tank. The plurality of limiting groove rails correspond to the plurality of primary crushing mechanisms one by one. The projection of the plurality of limiting groove rails on the horizontal plane does not coincide with the projection of the discharging mechanism on the horizontal plane. A through groove is formed through the lower side of each of the limiting groove rails, and the through groove and the corresponding contact pipe are in the same vertical plane.

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

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] The present invention relates to a device for accelerating diamond raw materials by means of a rotating cone in a vertically arranged crushing tank. The rotating cone is equipped with a driving member, and a plurality of receiving grooves are provided at equal intervals around the central axis on its side end. The diamond raw materials fall into the upper side of the rotating cone through a feed pipe and are guided into the receiving grooves. Under the action of the high-speed rotation of the rotating cone, the diamond raw materials obtain a horizontal thrust, which is converted into frictional resistance to prevent the diamond raw materials from slipping off the cone, and at the same time, the effective acceleration of the diamond raw materials is achieved. In addition, a plurality of primary crushing mechanisms are evenly distributed around the central axis of the crushing tank to ensure that the intersection of the central axes of the feeding pipes Ⅰ on the same horizontal plane precisely coincides with the central axis of the crushing tank. The accelerated diamond raw materials enter the crushing tank from the feeding pipe Ⅰ and collide with each other at the central axis, that is, the central position of the upward airflow. Utilizing the brittle and hard characteristics of diamonds, the diamond raw materials are impacted in different directions and with different forces at the central position, thereby achieving efficient primary crushing and significantly improving the crushing efficiency. The tiny debris generated by the high-speed impact is carried by the airflow into the discharging mechanism to ensure the uniformity of the discharging rate, avoid abnormal discharging phenomena, and enhance the stability of the production process. At the same time, the comprehensive and uniform impact at the central position helps to improve the product quality and roundness, meeting the requirements of application fields with higher roundness requirements. 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 cooperation relationship between the rotating cone and the mounting ring of the present invention.

[0028] Figure 8 It is a schematic diagram of the positional relationship between the limiting groove track and the crushing tank of the present invention.

[0029] Figure 9 It is a schematic diagram of the overall structure of the limiting groove track 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. Connecting pipe; 2202. Contact pipe; 23. Crushing tank; 24. Feeding pipe II; 25. Protrusion; 26. Rotating cone; 27. Mounting ring; 28. Accommodating groove; 29. Limiting ring; 3. Discharge mechanism; 4. Crushing tank; 5. Air pipe; 6. Feeding pipe; 7. Limiting groove track; 8. Through groove. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying 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 thus should not be construed as a limitation of the present invention.

[0033] Please refer to Figure 1 、 Figure 2 , an air jet mill for diamond treatment, similar to the prior art device, mainly composed of a raw material conveying mechanism 1, a crushing tank 4, and a discharge mechanism 3.

[0034] In practice, the diamond raw materials are transported by the raw material conveying mechanism 1 into the interior of the crushing tank 4, and the diamond raw materials freely settle under the influence of gravity inside the crushing tank 4. At this time, in combination with the air pipe 5 provided on the lower side of the crushing tank 4, by connecting the air pipe 5 to the crushing tank 4, a high-speed flowing air column is formed at the central position inside the crushing tank 4. The air column impacts the falling diamond raw materials and causes them to fly in all directions (the impact position between the air flow and the diamond raw materials determines the force direction of the diamonds). During this process, the diamond raw materials collide with the inner wall of the crushing tank 4 and with adjacent diamond raw materials, thereby achieving the effect of crushing and pulverizing the diamond raw materials.

[0035] In addition, as Figure 2As shown, the discharging mechanism 3 includes a plurality of limiting rods which serve as the main filtering mechanism. The plurality of limiting rods are arranged equidistantly around the same horizontal line. In this way, when the diamond raw materials with smaller particle sizes rise with the air flow, they will hit the limiting rods. The raw materials that meet the crushing standard 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 following the air flow, they will be broken by the force, forming a unique crushing effect. In addition, the annularly arranged limiting rods and their cylindrical structures can change the upward thrust received by the diamond raw materials with larger particle sizes, making them close to the inner wall of the crushing tank 4 to achieve a dispersing effect.

[0036] It should be noted that, as Figure 2 shown, a positioning disk is fixedly arranged at each of the two axial ends of the plurality of limiting rods. The positioning disk is rotationally connected to the crushing tank 4. The positioning disk not only fixes the discharging mechanism 3, but also makes the limiting rods form an integrally rotatable whole. When the diamond raw materials with larger particle sizes hit the limiting rods, the overall rotation can reduce the restraint on the speed of the raw materials and increase the offset effect, thereby enhancing the collision speed between the raw materials 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, a plurality of primary crushing mechanisms 2 are added in this application. The diamond raw materials enter the primary crushing mechanism 2 through the conveying mechanism and then enter the inner wall of the crushing tank 4 for crushing treatment.

[0038] Please refer to Figure 3 、 Figure 4 , specifically, each primary crushing mechanism 2 includes a crushing tank 23 in the up-down axial direction, and a rotating cone 26 in the up-down axial direction is rotatably connected inside the crushing tank 23.

[0039] It should be noted that a driving member is arranged on the upper side of the rotating cone 26, and the rotating cone 26 can be driven to rotate at a high speed through the driving member.

[0040] At the same time, as Figure 5 shown, a plurality of receiving grooves 28 are axially penetrated through the side ends of each rotating cone 26 up and down. The plurality of receiving grooves 28 are arranged equidistantly around the central axis of the rotating cone 26. This measure, combined with the self-gravitational potential energy of the diamond raw materials, can enable the diamond raw materials located inside the receiving grooves 28 to obtain a horizontal thrust during the high-speed rotation of the rotating cone 26. At this time, the thrust is converted into the frictional resistance between the diamond raw materials and the rotating cone 26 to prevent the raw materials 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 materials, the diamond raw materials can continuously rotate at a high speed following the rotating cone 26 inside the fixed receiving grooves 28.

[0041] ​Furthermore, the vertical layer projection of each rotating cone 26 is trapezoidal. This design enhances the adaptability of the device to the particle size of diamonds, 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 the remaining diamond raw materials, the diamond raw materials can have a continuous downward movement trend. At this time, it can fully ensure that the diamond raw materials can enter the inside of the receiving groove 28.

[0042] Furthermore, a plurality of rotating cones 26 can be arranged in the inner cavity of each crushing tank 23 of the device. For the multiple rotating cones 26 in each crushing tank 23, the projected width of the receiving groove 28 opened on the side end thereof gradually decreases from top to bottom on the horizontal plane. This move can form a multi-stage receiving structure, that is, it can avoid a large number of diamond raw materials being stuck near a single rotating cone 26 at the same time, affecting the subsequent raw materials from entering the crushing tank 23, and can fully ensure that the device can adapt to diamond raw materials of various particle sizes, and avoid the direct continuous downward dropping of diamond raw materials with larger particle sizes.

[0043] It should be noted that, as Figure 1 , Figure 3 shown, the raw material conveying mechanism 1 is a screw conveyor mechanism. This move can enable the diamond raw materials to enter the crushing tank 23 in a relatively uniform and moderate speed state, which can fully ensure that the input speed of the diamond raw materials meets the requirements and avoid the accumulation of diamond raw materials on the rotating cone 26.

[0044] Furthermore, as Figure 4 , Figure 6 , to avoid the diamond raw materials from bouncing when hitting the side end of the rotating cone 26 and ensure that they can quickly enter the inside of the receiving groove 28 and rotate with the rotating cone 26, the device restricts the discharge port of the raw material conveying mechanism 1 to be connected to the upper end of the crushing tank 4 through the feed pipe 6. The feed pipe 6 is located above the rotating cone 26, and the central axis of each feed pipe 6 is perpendicular to the side end face of the rotating cone 26. This move enables the impact force exerted on the rotating cone 26 by the diamond raw materials during the process of falling and hitting the side end of the rotating cone 26 to act completely on the side end of the rotating cone 26, thereby minimizing the bouncing of the diamond raw materials to the greatest extent.

[0045] In addition, as Figure 6 , Figure 7As shown, the device also has an installation ring 27 for each rotating cone 26 inside the crushing tank 23. The upper end of the installation ring 27 is coaxially and fixedly connected with 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 90-degree angle with the side end of the rotating shaft. This further increases the frictional resistance when the diamond raw material falls through the limiting ring 29, thereby slowing down its falling speed. At the same time, it further realizes the constraint of 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, so as to fully reduce the value of the component force generated when the diamond raw material impacts the side end of the rotating cone 26.

[0046] Correspondingly, the device is designed such that the central axis of each feed pipe 6 does not coincide with the corresponding limiting ring 29, thereby effectively preventing the conflict between the feed pipe 6 and the limiting ring 29 in the constraint of the diamond raw material, and ensuring that the diamond raw material can smoothly slide from the feed pipe 6 to the side end of the rotating cone 26.

[0047] Please refer to Figure 1 、 Figure 3 、 Figure 4 Specifically, to enable the diamond raw material to enter the pulverizing tank 4 from the crushing tank 23, the device has a feeding pipe I 22 for the rotating cone 26 at the side end of each crushing tank 23. The two axial ends of the feeding pipe I 22 are respectively connected to the crushing tank 23 and the pulverizing 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 I 22 on the same horizontal plane, and the projection center line of the feeding pipe I 22 on the horizontal plane coincides with the tangent of the rotating cone 26, the technical goal of smoothly transferring the diamond raw material from the crushing tank 23 to the pulverizing tank 4 is achieved.

[0048] It should be noted that as Figure 1 shown, the raw material conveying mechanism 1 and the feeding pipe I 22 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 it continuously rotates with the rotating cone 26 inside the receiving groove 28 until the diamond raw material moves to the connection between the feeding pipe I 22 and the crushing tank 23. Since there is an opening here, when the diamond raw material moves here, it loses the necessary shielding, and then the diamond raw material can enter the pulverizing tank 4 through the feeding pipe I 22.

[0049] Therefore, the device restricts a plurality of primary crushing mechanisms 2 to be arranged equidistantly around the central axis of the crushing tank 23. In this way, the central axes of the feeding pipes I 22 on the same horizontal plane intersect at the central axis of the pulverizing tank 4, ensuring that after the diamond raw materials are accelerated by the rotating cone 26, they directly enter the pulverizing tank 4 and collide with each other. At this time, the brittle and hard characteristics of the diamond raw materials themselves can be utilized to realize 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 more tiny diamond debris to be generated during the high-speed collision process. These debris are carried by the air flow into the discharging mechanism 3, ensuring a stable discharging rate and avoiding the problem of uneven discharging.

[0050] It should be noted that, please refer to Figure 1 , Figure 3 , Figure 4 , in order to avoid waste caused by the deposition of diamond raw materials at the bottom of the crushing tank 23, a downwardly inclined feeding pipe II 24 is connected to the lower end of each crushing tank 23 (such as Figure 3 ). At this time, combined with the characteristic that the feeding pipe II 24 is connected to the lower end of the pulverizing tank 4, the diamond raw materials not affected by the rotating cone 26 can enter the lower end of the pulverizing tank 4 through the feeding pipe II 24, so as to combine with the upward air flow.

[0051] It should be emphasized that in practical applications, the ingenious design of the multi-stage rotating cone 26, combined with the characteristic that the accommodating grooves 28 opened on the side ends of each rotating cone 26 gradually decrease from top to bottom in the horizontal plane projection, ensures that only the diamond raw materials with smaller particle sizes can smoothly enter the pulverizing tank 4 through the feeding pipe II 24. Considering the position where they enter the inside of the pulverizing tank 4, these diamond raw materials with reduced particle sizes move upward under the drive of the upward air flow and collide with the diamond raw materials entering the pulverizing tank 4 from the feeding pipe I 22. This process can make the diamond raw materials inside the pulverizing tank 4 have collision angles in multiple directions, effectively improving the pulverizing efficiency, and also making this part of the diamond raw materials with smaller particle sizes become more round and have smaller particle sizes, which better meets the pulverizing requirements for diamond processing.

[0052] It should be noted that, as Figure 3 , Figure 4 shown, the conveying member described in this application includes a moving member including a driven shaft 2102 in the up-and-down axial direction. The driven shaft 2102 is key-connected to a plurality of 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. By driving the driven shaft 2102 to rotate by the driving motor 2101, a plurality of rotating cones 26 are synchronously rotated in the crushing tank 23. This design not only reduces the failure rate of the device but also effectively reduces energy consumption.

[0053] Furthermore, 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 continuously colliding multiple protrusions 25 with diamond raw materials, the brittle and hard characteristics of the diamond raw materials themselves can be utilized to modify the protruding corners of the diamond raw materials. This can increase the generation of small-sized diamond raw materials, ensure the crushing effect, and make the particle size of the diamond raw materials entering the interior of the crushing tank 4 relatively uniform and the shape relatively round. This can ensure that the impact forces carried by the diamond raw materials hitting on the central axis of the crushing tank 4 are approximately equal, thereby achieving the maximum crushing efficiency. At the same time, this also makes the overall crushing time relatively controllable, facilitating the operator to grasp the operation time.

[0060] In addition, by continuously cooperating with multiple protrusions 25 and the layout of multiple rotating cones 26 in this device, it can effectively prevent a single long-strip diamond raw material from passing through the receiving groove 28 and entering the interior of the crushing tank 4, thereby ensuring

[0061] Furthermore, the device restricts the width of the lower end of each receiving groove 28 to be smaller than that of its upper end. By using the inclined plane on the side of the receiving groove 28, when the rotating cone 26 rotates, the inclined plane on the side of each receiving groove 28 can apply an upward oblique thrust to the corresponding diamond. This can prevent the diamond raw materials from being stuck between the protrusion 25 and the rotating cone 26 due to the influence of gravity (when it is stuck in the gap, 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 use the inclined plane at the lower end of the receiving groove 28 to make the diamond raw materials with larger particle sizes move upward), thereby effectively reducing the failure rate of the device.

[0062] Correspondingly, the receiving groove 28 can provide an upward thrust for the diamond raw materials with larger particle sizes. To prevent it from bouncing too high and affecting the subsequent entry of diamonds into the receiving groove 28, as Figure 7 shown, the device effectively restricts the bouncing height of the diamond raw materials in the receiving groove 28 by adjusting the distance between the limiting ring 29 and the protrusion 25, using the characteristics of the triangular longitudinal section of the limiting ring 29 and the characteristic that the horizontal projection diameter inside the limiting ring 29 is smaller than that of the rotating cone 26.

[0063] Please refer to Figure 8 、 Figure 9, Further, a plurality of limiting groove rails 7 are fixedly connected inside the crushing tank 4 of the device. The plurality of limiting groove rails 7 correspond to the plurality of primary crushing mechanisms 2 one by one. At the same time, through grooves 8 are formed through the lower sides of each of the limiting groove rails 7. The through grooves 8 and the corresponding contact pipes 2202 are in the same vertical plane. This can enable the diamond raw materials to collide with the diamond raw materials that fall after hitting the discharging mechanism 3 during the process of entering the crushing tank 4 through the feeding pipe Ⅰ22. Moreover, a horizontal thrust can be applied to them, so that they move to the vicinity of the upward air flow. This can realize the constraint of the position of the diamond raw materials inside the crushing tank 4, making them mainly limited near the central axis of the crushing tank 4 and at the same height as the feeding pipe Ⅰ22. This 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] Correspondingly, as Figure 9 shown, the width of the upper end of each limiting groove rail 7 is smaller than the width of its lower end. Each limiting groove rail 7 presents a converging state from top to bottom. This can make full use of its own physical structure characteristics to realize the constraint of the position of the falling diamond raw materials, enabling them to be concentrated at the connection position of the feeding pipe Ⅰ22 and the crushing tank 4. In this way, it can not only ensure that most of the diamond raw materials enter the central axis position of the crushing tank 4 after impact, but 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 plurality of limiting groove rails 7 and the discharging mechanism 3 (limiting rods) on the horizontal plane do not overlap with each other, so as to prevent interference with the upward air flow and ensure that the small-particle-size diamonds that meet the requirements can smoothly enter the discharging mechanism 3. At the same time, this design maximally promotes the positive circulation of the diamond raw materials. The raw materials first collide near the upward air flow, then hit the discharging mechanism 3 and scatter down, thus fully completing the collision process.

[0066] In the practical application of the present invention:

[0067] Primary crushing stage

[0068] The raw materials enter the crushing tank 23: The diamond raw materials pass through the auger conveying mechanism (raw material conveying mechanism 1) and enter the crushing tank 23 through the feeding pipe 6. The feeding pipe 6 is located above the rotating cone 26, and its central axis is perpendicular to the side end face of the rotating cone 26. The limiting ring 29 further restricts the falling trajectory of the raw materials, making the raw materials vertically impact the side end of the rotating cone 26 and reducing the bounce.

[0069] Enter the receiving groove 28 and accelerate: After the diamond raw materials impact the side end of the rotating cone 26, they enter the receiving groove 28 at the side end of the rotating cone 26. The rotating cone 26 is driven by the driving motor 2101 to drive the driven shaft 2102 to rotate, realizing high-speed rotation, so as to provide a horizontal thrust for the diamond raw materials in the receiving groove 28 and enable them to obtain speed.

[0070] Primary crushing by collision with the protrusions 25: During the rotation of the rotary cone 26, the diamond raw materials continuously collide with a plurality of protrusions 25 at the inner end of the mounting ring 27. By increasing the collision frequency and utilizing the brittle and hard characteristics of the diamond raw materials, the modification of the protruding corners is achieved, and primary crushing is completed. This process not only avoids the large-sized raw materials from getting stuck in the receiving grooves 28, but also makes the particle sizes of the raw materials entering the crushing tank 4 relatively uniform and the shapes relatively round. At the same time, the receiving groove 28 is designed with a structure where the lower end is narrower than the upper end, effectively preventing the raw materials from getting stuck in the gap between the protrusions 25 and the rotary cone 26 due to gravity. Meanwhile, the setting of the limiting ring 29 restricts the bouncing amplitude of the raw materials in the receiving groove 28.

[0071] Entering the crushing tank 4 and the secondary crushing stage

[0072] Entering the crushing tank 4 through the feeding pipe: When the rotary cone 26 drives the diamond raw materials to move to the connection between the feeding pipe Ⅰ22 and the crushing tank 23, the raw materials enter the crushing tank 4 through the feeding pipe Ⅰ22. The feeding pipe Ⅰ22 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 rotary cone 26. The included angle between the central axis of the contact pipe 2202 and the central axis of the receiving pipe 2201 is greater than 150° and less than 170°, and it is located below the receiving pipe 2201. Before the diamond raw materials enter the contact pipe 2202, they first pass through the receiving pipe 2201. Since the moving direction of the raw materials 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, they will hit the inner wall of the contact pipe 2202. With the characteristic of high-speed movement of the diamond raw materials, when hitting the inclined surface of the inner wall of the contact pipe 2202, their kinetic energy is converted into an additional directional component force, prompting the raw materials to start rotating.

[0073] Secondary collision crushing: After the rotating diamond raw materials enter the crushing tank 4 through the feeding pipe Ⅰ22, near the through groove 8 below the limiting groove track 7, they undergo secondary collision crushing with the diamond raw materials that have fallen inside the crushing tank 4. The limiting groove track 7 corresponds to the primary crushing mechanism 2 one by one. Its upper end width is smaller than the lower end width, showing a converging state from top to bottom, which can restrict the position of the falling raw materials and make them concentrated at the connection position between the feeding pipe Ⅰ22 and the crushing tank 4. During the rotation and collision process of the diamond raw materials, by increasing the collision angle and force, the effect of secondary crushing is significantly improved.

[0074] Tertiary collision crushing stage

[0075] The diamond raw materials after secondary collision and crushing continue to move horizontally to the central axis area of the crushing tank 4, where they undergo three - time collision and crushing with more raw materials. At the same time, those diamond raw materials that did not participate in the collision and crushing during the secondary collision stage and still maintained a rotating state scatter and crush in all directions during the movement towards the central axis of the crushing tank 4. This rotating and scattering state greatly enhances the probability of their collision with the diamond raw materials around, enabling more raw materials to participate in the three - time collision and crushing process. Multiple primary crushing mechanisms 2 are evenly distributed around the central axis of the crushing tank 4 to ensure that the raw materials entering from different feeding pipes can effectively collide on the central axis, thereby further improving the efficiency of the three - time collision and crushing.

[0076] Collision with the discharging mechanism 3 and the fourth - time crushing stage

[0077] The diamond raw materials after three - time collision and crushing move upward and impact the discharging mechanism 3 (composed of multiple limiting rods). Some diamond raw materials with smaller particle sizes and meeting the requirements enter between the limiting 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 undergo four - time collision and crushing with the limiting rods. Positioning disks are respectively fixed at both axial ends of the multiple limiting rods, enabling the overall free rotation of the limiting rods, reducing the inhibitory effect on the speed of the raw materials, and increasing the offset effect.

[0078] The fifth - time crushing stage

[0079] The diamond raw materials after four - time collision and crushing are offset by the discharging mechanism 3 and move towards the inner wall of the crushing tank 4, where they undergo five - time collision and crushing with the inner wall of the crushing tank 4. Subsequently, the raw materials continuously circulate in the crushing tank 4 until the established discharging standard is met.

[0080] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An airflow crusher for diamond treatment, comprising a raw material conveying mechanism (1). One side of the raw material conveying mechanism (1) is provided with a crushing tank (4) in the up-and-down axial direction. Moreover, a trachea (5) is provided on the lower side of the crushing tank (4), and a discharging mechanism (3) is provided on the upper side of the crushing tank (4), characterized in that: It further includes a primary crushing mechanism (2). The number of the primary crushing mechanisms (2) is multiple, and the multiple primary crushing mechanisms (2) are arranged at equal intervals around the central axis of the crushing tank (4). Each of the primary crushing mechanisms (2) includes a crushing tank (23). Inside the crushing tank (23), a rotating cone (26) with a trapezoidal vertical plane projection and an up-and-down axis is rotatably connected. A driving member is arranged above the rotating cone (26). A plurality of receiving grooves (28) are vertically and penetratingly formed in the side end of each rotating cone (26). The plurality of receiving grooves (28) are arranged at equal intervals around the central axis of the rotating cone (26). Moreover, a feeding pipe I (22) is connected to the side end of each crushing tank (4). The feeding pipe I (22) and the receiving groove (28) are in the same horizontal plane. The center line of the horizontal plane projection of the feeding pipe I (22) coincides with the tangent line of the horizontal plane projection of the rotating cone (26). The other axial end of each feeding pipe I (22) is communicated with the crushing tank (4). Moreover, the intersection point of the central axes of the plurality of feeding pipes I (22) in 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 feeding pipe (6). The feeding pipe (6) is located above the rotating cone (26).

2. The jet mill for diamond treatment according to claim 1, wherein: An installation ring (27) is fixedly connected to the inner cavity of the crushing tank (23). A plurality of protrusions (25) are arranged at the inner side end of the installation ring (27). Moreover, the protrusions (25) and the receiving grooves (28) are in the same horizontal plane.

3. The jet mill for diamond treatment according to claim 2, characterized in that: A plurality of rotating cones (26) are arranged in the inner cavity of each crushing tank (23). The plurality of rotating cones (26) are provided with an installation ring (27) and a feeding pipe I (22) in a matching manner. At the same time, the horizontal plane 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 jet mill for diamond treatment according to claim 3, wherein: The driving member includes a driven shaft (2102) with an up-and-down axis. The driven shaft (2102) is key-connected to the plurality of rotating cones (26) in each crushing tank (23). Moreover, a driving motor (2101) is arranged above the driven shaft (2102). The output shaft of the driving motor (2101) is fixedly connected to the driven shaft (2102).

5. The jet mill for diamond treatment according to claim 3, characterized in that: A limiting ring (29) is fixedly connected to the upper end of each installation ring (27). The diameter of the horizontal plane projection of the inner side end of the limiting ring (29) is smaller than the diameter of the horizontal plane projection of the rotating cone (26). Moreover, the longitudinal section of the limiting ring (29) is in a triangular structure. The upper end surface of each limiting ring (29) is parallel to the central axis of the corresponding feeding pipe (6). The central axis of each feeding pipe (6) is perpendicular to the side end surface of the rotating cone (26). The central axis of each feeding pipe (6) does not coincide with the corresponding limiting ring (29).

6. The air jet mill for diamond treatment according to claim 3, wherein: The width of the lower end of each receiving groove (28) is smaller than the width of its upper end. Moreover, when the rotating cone (26) rotates, the inclined surface at the side end of each receiving groove (28) applies an obliquely upward thrust to the corresponding diamond.

7. The jet mill for diamond treatment according to claim 3, characterized in that: The feeding pipe I (22) includes a receiving pipe (2201) communicating with the crushing tank (23). The central axis of the receiving pipe (2201) coincides with the tangent line of the horizontal plane projection of the rotating cone (26). Moreover, a contact pipe (2202) is connected to the side of the receiving pipe (2201) close to the crushing tank (4). The included 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. An air jet mill for diamond treatment according to claim 7, characterized in that: The contact pipe (2202) is located below the receiving pipe (2201). The included angle between the central axis of the contact pipe (2202) and the central axis of the receiving pipe (2201) is greater than 150° and less than 170°.

9. The jet mill for diamond treatment according to claim 1, wherein: A plurality of limiting groove rails (7) are fixedly connected to the inner side of the crushing tank (4). The plurality of limiting groove rails (7) correspond to the plurality of primary crushing mechanisms (2) one by one. The projection of the plurality of limiting groove rails (7) on the horizontal plane does not coincide with the projection of the discharging mechanism (3) on the horizontal plane. A through groove (8) is opened through the lower side of each limiting groove rail (7). The through groove (8) and the corresponding contact pipe (2202) are in the same vertical plane.

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

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