Ultrafine boron carbide powder micronization equipment

Abstract

The invention relates to the technical field of boron carbide powder equipment, in particular to superfine boron carbide powder micronization equipment which comprises a tank body, a powder grinding device is arranged in the tank body and comprises a rotating shaft arranged in the tank body, the top of the rotating shaft protrudes out of the tank body, the rotating shaft is connected with a power device, and the power device is connected with the tank body. A graded grinding device is arranged in the tank body and comprises a rotating block arranged on the upper portion of a rotating shaft, a grinding shell is arranged outside the rotating block, a grinding wheel capable of adjusting pressure is arranged below the rotating block, and a grinding disc is arranged below the grinding wheel in a matched mode. The energy consumption and the consumption of the boron carbide body are greatly saved, the production cost is saved, and the method has the characteristics of high efficiency and strong energy-saving control force.

Description

Technical Field

[0001] The invention relates to the technical field of boron carbide powder equipment, and in particular to a micronizing equipment for ultrafine boron carbide powder. Background Art

[0002] Boron carbide (B 4 C) is a multifunctional non-oxidizing ceramic with high melting point (2450℃), low density (2.52g / cm 3 ), high hardness (second only to diamond and cubic boron nitride, and the hardness exceeds both when it exceeds 1300℃), good chemical stability (anti-oxidation, corrosion resistance), large neutron absorption cross section and other excellent properties. In recent years, materials prepared from boron carbide have been widely used in various industries. For example, wear-resistant materials such as nozzles and grinding wheels in the material grinding industry; bulletproof armor plates and electric heat conversion devices prepared by its density, electrical properties and other characteristics in the military industry; key components used to absorb neutrons and control reactions in the nuclear industry.

[0003] During processing, it needs to be ground to facilitate subsequent processing. In the prior art, a horizontal ball mill or a vertical grinder is used to grind boron carbide. However, when quality inspection is required for some produced boron carbide bodies during the research and development process, if a large ball mill or a vertical mill is used, the energy consumption is large, and due to the small number of samples, the required fineness often cannot be achieved during the grinding process. If a large amount of boron carbide powder is directly ground and processed, the finished product will be inspected after it comes out. If it is unqualified, more materials will be wasted, resulting in high costs and serious waste. Therefore, it is necessary to design a device that can meet the processing needs of small batches of boron carbide powder. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art that boron carbide powder is seriously wasted and has high cost during small batch processing, and to provide a micronizing device for ultrafine boron carbide powder.

[0005] In order to achieve the above-mentioned purpose, the embodiment of the present invention specifically adopts the following technical scheme: an ultrafine boron carbide powder micronizing device, comprising a tank body, a grinding device is arranged inside the tank body, the grinding device comprises a rotating shaft arranged inside the tank body, the top of the rotating shaft protrudes from the tank body, the rotating shaft is connected to a power device, a graded grinding device is arranged inside the tank body, the graded grinding device comprises a rotating block arranged on the upper part of the rotating shaft, a grinding shell is arranged outside the rotating block, a grinding wheel with adjustable pressure is arranged below the rotating block, and a grinding disk is arranged below the grinding wheel.

[0006] Furthermore, a collecting bin is provided on the upper portion of the tank body, and an output end of the collecting bin is connected to a cyclone separator.

[0007] Furthermore, the rotating block is a star-shaped diamond coarse grinding disc, the rotating block is an eccentric wheel structure with one side protruding outward, and a balancing block for balancing centrifugal force is arranged at the bottom of the rotating block.

[0008] Furthermore, the distance between the grinding shell and the rotating block is 10-15 mm.

[0009] Furthermore, a grinding groove is provided on the upper surface of the grinding disc, the grinding wheel is connected to the rotating shaft through an adjusting device, and the grinding surface of the grinding wheel abuts against the grinding groove.

[0010] Furthermore, the grinding wheel includes a support plate, a mounting block connected to the adjusting device is arranged on the back side of the support plate, an outer wheel body is rotatably arranged on the outer side of the support plate, the outer wheel body abuts against the grinding groove, a mounting groove is arranged inside the support plate, a rotating part rotating along the axis of the support plate is arranged inside the mounting groove, and a gravity block is eccentrically arranged at the output end of the rotating part.

[0011] Furthermore, the adjustment device includes a support rod hingedly arranged in the middle position of the mounting block, the tail of the support rod is hinged to the rotating shaft, and the upper part of the mounting block is hingedly provided with a retractable adjustment rod, and the tail of the adjustment rod is hinged to the side of the rotating shaft.

[0012] Furthermore, the edge of the grinding disc is arranged as an inclined surface inclined toward the grinding groove, the interior of the grinding disc is provided with a cooling groove for cooling the grinding groove, and the end of the cooling groove is connected to a cooling device arranged outside the tank body through a connector.

[0013] Furthermore, a device slot is provided in the middle of the grinding disc, and a vibration device is provided inside the device slot.

[0014] Furthermore, a plurality of air slots for ventilation are vertically arranged on the side wall of the tank body, an air inlet is arranged at the bottom of the tank body, and a filter is arranged outside the air inlet.

[0015] The beneficial effects of the embodiment of the present invention are as follows: the grinding shell is not provided with a skirt, the skirt is set downward, the bottom of the skirt is lower than the bottom of the rotating block, and the inner side of the skirt is inclined like the center position, so that the material after preliminary grinding can be controlled to fall downward at an inclined angle to the middle position, preventing the boron carbide body from entering the lower wind slot during the falling process, and the cooling groove is arranged on two contact surfaces. The cooling groove can only be connected when the grinding discs are connected together, and half of the cooling groove is processed on each split body, which can be connected only after they are combined, so that it is convenient to process the grinding disc, especially in the grinding test process of small batches of boron carbide powder, the volume is small, the energy consumption is low, the control is simple, the energy consumption and the consumption of the boron carbide body are greatly saved, and the production cost is saved. It has the characteristics of high efficiency, strong energy-saving control, and is particularly suitable for the processing and quality inspection of small batches of samples, and effectively reduces energy consumption and material waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the overall structure of the present invention from another angle;

[0018] Figure 3 It is a schematic diagram of the overall internal structure of the present invention;

[0019] Figure 4 It is a schematic diagram of the bottom cross-sectional structure of the present invention;

[0020] Figure 5 It is a schematic diagram of the structure of the adjusting rod of the present invention;

[0021] Figure 6 It is a schematic diagram of the structure after the grinding wheel of the present invention is lifted;

[0022] Figure 7 It is a schematic diagram of the internal structure of the grinding wheel of the present invention;

[0023] Figure 8 It is a schematic diagram of the gravity block structure of the present invention;

[0024] In the figure: 1. tank body; 101. air inlet; 102. manhole; 103. collecting bin; 104. feeding pipe; 2. rotating shaft; 201. connecting plate; 202. pipe groove; 3. grinding shell; 4. rotating block; 301. air groove; 5. grinding wheel; 501. adjusting rod; 502. supporting rod; 503. sleeve; 504. spring; 505. mounting block; 506. supporting plate; 507. outer wheel body; 508. rotating part; 509. gravity block; 6. grinding disc; 601. grinding groove; 602. cooling groove; 603. equipment groove; 604. vibrator; 7. supporting column. DETAILED DESCRIPTION

[0025] Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0026] See also Figures 1 to 8 The embodiment of the present invention discloses an ultrafine boron carbide powder micronizing device, which mainly includes a tank body 1, a grinding device, a grading grinding device and auxiliary components. The diameter and height of the tank body 1 are designed with different models according to the maximum processing capacity, and the tank body 1 is used as the main structure, and a grinding device and a grading grinding device are arranged inside. The grinding device is driven by a power device, wherein the power device is a driving motor arranged outside (omitted in the drawings), and the grading grinding device ensures the fineness control of the powder.

[0027] A rotating shaft 2 is vertically arranged inside the tank body 1, and the top of the rotating shaft 2 protrudes from the outside of the tank body 1, which is convenient for connection with the power device. A connecting plate 201 connected to the power device is arranged on the top of the rotating shaft 2. The external driving motor is connected through the connecting plate 201 to control the rotation speed of the rotating shaft to achieve different control effects. The connection method can use a belt, a chain, etc. When the power device is started, the rotating shaft 2 is driven to rotate, and then the grinding device is driven to work. A rotating block 4 is arranged on the upper part of the rotating shaft 2. The rotating block 4 adopts a star-shaped tooth diamond coarse grinding disc design, and its structure is a conical cross section, and One side of the rotating block 4 is convex to the outside, and the convex part forms an eccentric wheel structure. A balancing block is installed on the opposite side of the convex part of the bottom of the rotating block 4 to offset the centrifugal force and ensure stable operation. The grinding shell 3 is coaxially arranged close to the outside of the rotating block 4, and the side of the grinding shell 3 is fixed on the inner wall of the tank body 1. The spacing between the grinding shell 3 and the rotating block 4 is controlled between 5-15mm, and a fixed disk is arranged at the bottom of the rotating shaft 2 to ensure the rotation stability of the rotating shaft 2, ensure the grinding efficiency, and avoid excessive wear. When in use, feed is added from the feed pipe 104 arranged on the side wall of the tank body 1. The feed pipe 104 is provided with a movable cover, which is closed after adding materials to reduce the upward flow of internal airflow and improve the collection effect. The upper part of the grinding shell 3 is set in a funnel shape to guide the materials added from the feed pipe 104 into the space between the grinding shell 3 and the rotating block 4. The side addition of materials reduces the operation height, and can be directly operated manually during use, which is convenient for a small amount of processing operations and improves the use effect. When the rotating block 4 rotates, the distance between the raised part of the surface and the grinding shell 3 is small, and the extrusion effect is stronger, which can better grind and crush the boron carbide body. There are reinforcing ribs to improve the use effect. A skirt is arranged at the bottom of the grinding shell 3. The skirt is arranged downward, the bottom of the skirt is lower than the bottom of the rotating block 4, and the inner side of the skirt is inclined toward the center position, so that the material after preliminary grinding can be controlled to fall downward at an inclined angle to the middle position, preventing the boron carbide body from entering the lower wind groove 301 during the falling process, and the connection surface between the lower grinding disc 6 and the inner wall of the tank body 1 is an inclined surface, which guides the fallen boron carbide material to the grinding disc 6, and forms a material lifting process in this process, thereby improving the collection capacity and ensuring the use effect.

[0028] A collecting bin 103 is provided on the upper part of the tank body 1 for collecting the ground boron carbide powder. The output end of the collecting bin 103 is connected to a cyclone separator to further separate fine particles in the powder and improve the quality of the powder. A plurality of wind slots 301 are vertically provided on the side wall of the tank body 1. The wind slots 301 penetrate the side walls of the grinding shell 3 and the grinding disc 6. An air inlet 101 is provided at the bottom of the tank body 1. A filter is installed outside the air inlet 101 to ensure air circulation during the grinding process and prevent impurities from entering the tank body 1. When in use, the air flow inside the tank body 1 flows upward from the bottom into the collecting bin 103, and is separated by a cyclone separator. A flowing air flow is formed along the inner wall of the tank body 1, and the finer boron carbide powder generated during the preliminary grinding and fine grinding process can be carried away by the air flow upward for collection, thereby ensuring the processing effect.

[0029] The boron carbide body that has been preliminarily ground by the rotating block 4 falls downward onto the grinding disc 6. A grinding wheel 5 with adjustable pressure is arranged above the grinding disc 6. The grinding wheel 5 is connected to the rotating shaft 2 through an adjusting device to achieve up and down adjustment. During the adjustment process, if the grinding wheel 5 continues to be pressed downward, the pressure between the grinding wheel 5 and the grinding groove 601 is increased, so that the boron carbide body can be better ground and milled. The grinding surface of the grinding wheel 5 is tightly abutted against the grinding groove 601 arranged on the upper surface of the grinding disc 6. The adjusting device includes a support rod 502 hingedly arranged in the middle position of the mounting block 505 and a retractable adjusting rod 501. Two support rods 502 are arranged on each grinding wheel 5, and are hinged to the rotating shaft 2 in an "eight" shape. A pipe groove 202 is arranged at the axial position of the rotating shaft 2. The adjusting rod 501 uses a hydraulic rod or an electric push rod. Wires or hydraulic pipes can be laid inside the pipe groove 202 to connect with the adjusting rod 501. To ensure the normal use of the adjusting rod 501, a sleeve 503 is provided at the output end of the adjusting rod 501, a baffle is provided on the top of the adjusting tube, the baffle is slidably arranged inside the sleeve 503, a spring 504 is provided inside the sleeve 503, one end of the sleeve 503 is hinged to the grinding wheel 5, when in use, the adjusting rod 501 is contracted to lift the grinding wheel 5, so that the boron carbide can better enter the grinding groove 601, improve the grinding effect, and ensure the stability of use, when grinding is required, the adjusting rod 501 is extended, so that the bottom of the grinding wheel 5 enters the grinding groove 601, thereby squeezing the material inside, when the adjusting rod 501 is extended, the baffle compresses the spring 504, and after entering the grinding groove 601, it can continue to maintain the side pressure on the grinding groove 601, and by controlling the telescopic length of the adjusting rod 501, the pressure of the grinding wheel 5 on the inside of the grinding groove 601 can be changed, thereby improving the grinding effect.

[0030] The design of the grinding disc 6 takes cooling and vibration functions into consideration, and a cooling groove 602 is arranged inside the grinding disc 6, which is connected to an external cooling device through a connector, effectively preventing overheating during the grinding process. The grinding disc 6 is designed as an upper and lower split structure, connected by bolts, and the cooling groove 602 is arranged on two contact surfaces. The cooling groove 602 can only be connected when the grinding discs 6 are connected together. Half of the cooling groove 602 is processed on each split body, and they can only be connected when they are put together, which facilitates the processing of the grinding disc 6, and the cooling groove 602 is mainly arranged below the grinding groove 601. The cooling device includes but is not limited to an external chiller. A sealing gasket is arranged on the buckling surface of the grinding disc 6 to maintain sealing. During production, the bottom of the grinding disc 6 is movably installed using bolts, and the upper side with the grinding groove 601 is welded to the inner wall of the tank body 1. On the top, the supporting strength of the grinding disc 6 is ensured to improve the use effect, and the upper surface of the grinding disc 6 is set to an inclined surface. During the initial drop of the material, most of the material can be guided to the grinding groove 601 to improve the grinding effect. An equipment groove 603 is set in the middle position of the grinding disc 6 for installing a vibration device. During the processing, some materials will fall onto the inclined surface in the middle of the grinding disc 6. When the bottom of the grinding disc 6 is opened, it is convenient to install the vibration device. The vibration device is an exciter 604, and the power supply is connected from the bottom with an electric wire. During use, the grinding disc 6 is fixed. A support column 7 is set in the middle position of the grinding disc 6 to increase the structural strength of the grinding disc 6. The bottom of the rotating shaft 2 is connected to the support column 7 through a ring. The ring is set inside the fixed disc to ensure the stability of the lower part of the rotating shaft 2 when rotating, thereby improving the grinding efficiency.

[0031] In addition, the grinding wheel 5 is composed of a support plate 506, a mounting block 505, an outer wheel body 507, a rotating part 508 and a gravity block 509. The support plate 506 is connected to the adjustment device through the mounting block 505. The outer wheel body 507 is rotatably arranged on the outer side of the support plate 506 and abuts against the grinding groove 601. When in use, the grinding wheel 5 is rolled inside the grinding groove 601 through the rotation of the rotating shaft 2. The shear force and pressure formed will form a grinding effect on the internal boron carbide body. A bearing is provided between the support plate 506 and the outer wheel body 507. The support plate 506 is connected to the adjustment rod 501 and the support rod 502. The support plate 506 is connected to the mounting block 505. It does not rotate when in use. The outer wheel body 507 will rotate under the drive of pressure to produce the effect of extrusion and grinding. After a certain period of grinding, the inspection standard is met. During the grinding process During the process, since the upper part of the grinding wheel 5 is close to the inner wall of the tank body 1 when rotating, when passing above the wind slot 301, part of the upward air volume can be blocked and guided along the outer side of the grinding wheel 5 to the grinding slot 601, so that the fine materials generated during the grinding process are sucked away. When the grinding is completed, there will still be some residue inside the grinding slot 601. At this time, the control adjustment rod 501 is contracted to lift the grinding wheel 5 upward, so that the bottom of the grinding wheel 5 is close to the inner wall of the tank body 1, and the shaft is controlled to rotate at a low speed and the air volume of the cyclone separator is increased, so that the wind inside the wind slot 301 can be guided to the inside of the grinding slot 601, and the boron carbide powder remaining in the grinding slot 601 is sucked away to complete the entire processing. The operation is simple and the steps are clear. A manhole 102 is set on the side wall of the tank body 1 to facilitate cleaning and maintenance of the interior and improve the use effect.

[0032] A mounting groove is provided inside the support plate 506, and a rotating part 508 is provided inside the mounting groove, and the rotating part 508 is on a side of the mounting block 505 away from the mounting block 505, wherein the rotating part 508 includes a rolling motor, and a gravity block 509 is eccentrically provided at the output end of the rolling motor, and the gravity block 509 is fan-shaped, and is electrically connected to the wires inside the tube groove 202 through a hole provided on the mounting block 505, and is driven by servo control to swing in a horizontal position, so that the grinding wheel 5 has a downward force during the rotation process, and the gravity block 509 accelerates when moving downward and decelerates when moving upward, so that there is a stamping effect during the grinding process, thereby strengthening the force and increasing the grinding effect.

[0033] During use, the power device is started, and the rotating shaft 2 drives the rotating block 4 to rotate. The boron carbide raw material between the grinding shell 3 and the rotating block 4 is subjected to shearing and impact, and is initially broken. Subsequently, the raw material enters the grinding groove 601 between the grinding wheel 5 and the grinding disc 6, and is finely ground by the grinding wheel 5 to reach the required fineness. During the grinding process, the cooling device continues to work to prevent overheating. During and after the grinding process, the powder enters the cyclone separator through the collecting bin 103 for separation, and finally obtains ultrafine boron carbide powder that meets the requirements. In this process, if the cyclone separator separates a large amount of boron carbide powder with a larger diameter, it can be collected and processed for secondary processing to meet the processing and production needs, especially in the grinding test processing of small batches of boron carbide powder, the volume is small, the energy consumption is low, the control is simple, the energy consumption and the consumption of boron carbide are greatly saved, and the production cost is saved. It has the characteristics of high efficiency, strong energy-saving control, and is particularly suitable for the processing and quality inspection of small batches of samples, and effectively reduces energy consumption and material waste.

[0034] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0035] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0037] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An ultrafine boron carbide powder micronizing device, comprising a tank, characterized in that: A grinding device is arranged inside the tank body, and the grinding device includes a rotating shaft arranged inside the tank body, the top of the rotating shaft protrudes from the tank body, and the rotating shaft is connected to a power device. A graded grinding device is arranged inside the tank body, and the graded grinding device includes a rotating block arranged on the upper part of the rotating shaft, a grinding shell is arranged outside the rotating block, a grinding wheel with adjustable pressure is arranged below the rotating block, and a grinding disk is arranged below the grinding wheel.

2. The ultrafine boron carbide powder micronizing equipment according to claim 1, characterized in that: A collecting bin is arranged on the upper part of the tank body, and a cyclone separator is connected to the output end of the collecting bin.

3. The ultrafine boron carbide powder micronizing equipment according to claim 1, characterized in that: The rotating block is a star-shaped diamond coarse grinding disc, and the rotating block is an eccentric wheel structure with one side protruding outward. A balancing block for balancing centrifugal force is arranged at the bottom of the rotating block.

4. The ultrafine boron carbide powder micronizing equipment according to claim 1, characterized in that: The distance between the grinding shell and the rotating block is 10-15 mm.

5. The ultrafine boron carbide powder micronizing equipment according to claim 1, characterized in that: The upper surface of the grinding disc is provided with a grinding groove, the grinding wheel is connected to the rotating shaft through an adjusting device, and the grinding surface of the grinding wheel abuts against the grinding groove.

6. The ultrafine boron carbide powder micronizing equipment according to claim 5, characterized in that: The grinding wheel includes a support plate, a mounting block connected to an adjusting device is arranged on the back side of the support plate, an outer wheel body is rotatably arranged on the outer side of the support plate, the outer wheel body abuts against the grinding groove, a mounting groove is arranged inside the support plate, a rotating part rotating along the axis of the support plate is arranged inside the mounting groove, and a gravity block is eccentrically arranged at the output end of the rotating part.

7. The ultrafine boron carbide powder micronizing equipment according to claim 6, characterized in that: The adjusting device comprises a support rod hingedly arranged in the middle of the mounting block, the tail of the support rod is hingedly arranged with the rotating shaft, the upper part of the mounting block is hingedly arranged with a telescopic adjusting rod, the tail of the adjusting rod is hingedly arranged with the side of the rotating shaft.

8. The ultrafine boron carbide powder micronizing equipment according to claim 5, characterized in that: The edge position of the grinding disc is set as an inclined surface inclined toward the grinding groove. The interior of the grinding disc is provided with a cooling groove for cooling the grinding groove. The end of the cooling groove is connected to a cooling device arranged outside the tank body through a connector.

9. The ultrafine boron carbide powder micronizing equipment according to claim 6, characterized in that: An equipment slot is arranged in the middle of the grinding disc, and a vibration device is arranged inside the equipment slot.

10. The ultrafine boron carbide powder micronizing equipment according to claim 1, characterized in that: A plurality of air slots for ventilation are vertically arranged on the side wall of the tank body, an air inlet is arranged at the bottom of the tank body, and a filter is arranged outside the air inlet.

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