Grinding device and energy-saving grinding method for silicon carbide bulletproof ceramic powder production

Abstract

The invention relates to the technical field of silicon carbide micro powder production equipment, in particular to a grinding device and an energy-saving grinding method for silicon carbide bulletproof ceramic powder production.The grinding device comprises an equipment unit, coarse screening equipment, fine screening equipment, a smashing unit, a positioning unit, a cleaning unit and fine screening equipment; the fine screening equipment is movably arranged in the coarse screening equipment; the fixed gear shaft is mounted at the center of the positioning plate and is meshed with the transmission gear, so that when the driving shaft drives the grinding roller to rotate around the fixed gear shaft, the fixed gear shaft enables the transmission gear meshed with the fixed gear shaft to rotate, and the transmission gear drives the grinding roller at one end of the transmission gear to rotate between the two side plates; silicon carbide particles on the surface of the coarse screening bin are ground in a rolling mode, silicon carbide is prevented from being in front of the grinding roller, and therefore the grinding efficiency of the grinding roller on the silicon carbide particles is improved.

Description

Technical Field

[0001] The invention relates to the technical field of silicon carbide micropowder production equipment, in particular to a grinding device and an energy-saving grinding method for producing silicon carbide bulletproof ceramic powder. Background Art

[0002] Silicon carbide is a compound semiconductor material composed of carbon and silicon. It is one of the ideal materials for making high-temperature, high-frequency, high-power and high-voltage devices. Silicon carbide has four major application areas, namely: functional ceramics, advanced refractory materials, abrasives and metallurgical raw materials. Therefore, silicon carbide is widely used in the production of silicon carbide ceramics. In the production process of silicon carbide, different production methods can produce silicon carbide in the form of solid or powder. The specific form depends on the production process and subsequent treatment process. Silicon carbide ceramics are usually formed by sintering silicon carbide particles. High-purity silicon carbide powder is usually required as raw material to ensure the physical and chemical properties of the ceramics. At the same time, the particle size and gradation of silicon carbide powder have a significant impact on the density and performance of the ceramics. Therefore, the industrially produced silicon carbide particles need to be ground and crushed.

[0003] In the existing grinding device, for silicon carbide, a rolling roller uses gravity to crush and grind the silicon carbide particles, and a power shaft drives the rolling roller to rotate to further crush and grind the silicon carbide particles. However, during the rotation and grinding process, if the friction between the rolling roller and the bottom surface of the grinding disc is too small, the rolling roller will push the silicon carbide particles to crush and grind, and some silicon carbide particles will not be crushed and ground by the rolling roller, making it difficult to fully grind the silicon carbide raw material, resulting in uneven particle size of the obtained silicon carbide powder. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a grinding device, comprising an equipment unit, a coarse screening device, a fine screening device, a crushing unit, a positioning unit, a cleaning unit, and a fine screening device, wherein the coarse screening device is fixedly arranged inside the equipment unit, the fine screening device is movably arranged inside the coarse screening device, the crushing unit is arranged at the bottom of the inner wall of the coarse screening device, the positioning unit located on one side of the fine screening device is arranged inside the coarse screening device, the cleaning unit is arranged around the inside of the coarse screening device, and the fine screening device located below the coarse screening device is arranged inside the equipment unit; the equipment unit comprises an equipment housing, a servo motor is arranged at the top of the equipment housing, a driving shaft located inside the equipment housing is arranged at one end of the servo motor, a coarse screening bin located outside the driving shaft is arranged inside the equipment housing, filtering grooves are evenly arranged at the bottom of the inner wall of the coarse screening bin, a fine screening connecting plate located outside the driving shaft is arranged inside the coarse screening bin, a spring connecting column is arranged at the bottom of the fine screening connecting plate, a spring connecting plate is arranged at the bottom of the spring connecting column, and the spring connecting plate The bottom of the device is provided with a side plate, a grinding roller is provided inside the side plate, and grinding balls are evenly provided on the outside of the grinding roller. A transmission gear located on one side of the drive shaft and connected to the grinding roller is provided on the outside of the side plate. A grinding assembly is provided on the outside of the drive shaft. A positioning plate located on the outside of the drive shaft is provided in the middle of the coarse screening bin, and a limiting telescopic column is provided inside the positioning plate. A fixed gear shaft is provided on the top of the limiting telescopic column, and a gear protection cover located on the outside of the fixed gear shaft is provided inside the positioning plate; the servo motor drives the drive shaft to rotate, and the drive shaft drives the fine screen connecting plate, the spring connecting column, and the spring connecting plate to rotate in turn, thereby driving the grinding roller to rotate in the coarse screening bin, and the grinding balls rotate synchronously with the transmission gear, the coarse screening bin and the positioning plate are fixed in the equipment housing and do not move, the limiting telescopic column connects the fixed gear shaft to the top of the positioning plate, and when the gear protection cover rises, it will drive the fixed gear shaft to rise synchronously, and when the gear protection cover rotates, the fixed gear shaft is fixed by the limiting telescopic column.

[0005] As a preferred solution of the grinding device described in the present invention, the outer side of the gear protection cover is provided with a connecting hole matched with the size of the transmission gear, and the transmission gear passes through the gear protection cover and meshes with the fixed gear shaft.

[0006] As a preferred solution of the grinding device described in the present invention, wherein: the top of the coarse screening bin is provided with a coarse screen protection cover located above the fine screen connecting plate, the bottom of the coarse screening bin is provided with a protective ring located on the outside of the driving shaft, the outside of the protective ring is provided with a connecting block, the outside of the connecting block is provided with a coarse screen collecting bin located at the bottom of the coarse screening bin, and the interior of the coarse screen collecting bin is inclined.

[0007] As a preferred embodiment of the grinding device described in the present invention, the crushing unit includes an extrusion plate arranged at the bottom of the inner wall of the coarse screening bin, the top of the extrusion plate is evenly provided with crushing grooves, the bottom of the extrusion plate is provided with a top plate located inside the coarse screening bin, and the top of the top plate is provided with a cleaning block adapted to the size of the crushing groove.

[0008] As a preferred solution of the grinding device described in the present invention, inclined plates are provided on both sides of the extrusion plate, and the shape of the inclined plates is a right triangle.

[0009] As a preferred embodiment of the grinding device described in the present invention, the cleaning unit includes a transmission handle arranged on the outside of the coarse screening bin, one end of the transmission handle is provided with a transmission gear group located inside the coarse screening bin, the inside of the coarse screening bin is provided with a wire take-up roller meshing with the transmission gear group, the inside of the coarse screening bin is provided with a fixed rod located below the top plate, the outside of the fixed rod is provided with a fixed ring, the outside of the fixed rod is provided with a movable ring located on one side of the fixed ring, and the top of the movable ring is provided with a connecting hinge.

[0010] As a preferred solution of the grinding device described in the present invention, a return spring located between the fixed ring and the movable ring is provided on the outer side of the fixed rod, and one end of the connecting hinge is connected to the bottom of the top plate.

[0011] As a preferred solution of the grinding device described in the present invention, a nylon rope is provided on the outer side of the take-up roller, and the nylon rope is connected to the outer sides of the two groups of moving rings.

[0012] As a preferred embodiment of the grinding device described in the present invention, a material receiving pipe is provided at the bottom of the coarse screening bin, a fine screening bin is provided at the bottom of the material receiving pipe, a fine screening grinding device located outside the driving shaft is provided inside the fine screening bin, a fine screening material receiving bin is provided at the bottom of the fine screening bin, a discharge pipe is provided on one side of the fine screening material receiving bin, and a base is provided at the bottom of the equipment casing.

[0013] Compared with the prior art, the present invention provides a grinding device and an energy-saving grinding method for producing silicon carbide bulletproof ceramic powder, which has the following beneficial effects: 1. By installing the fixed gear shaft at the center of the positioning plate and meshing the fixed gear shaft with the transmission gear, when the driving shaft drives the grinding roller to rotate around it, the fixed gear shaft will rotate the transmission gear meshed with it, and then the transmission gear drives the grinding roller at one end to rotate between the two side plates, rolling and grinding the silicon carbide particles on the surface of the coarse screening bin, preventing the silicon carbide from being in front of the grinding roller, thereby improving the grinding efficiency of the grinding roller on the silicon carbide particles.

[0014] 2. Through the crushing unit and the spring connecting column, when the grinding roller passes through the extrusion plate, the extrusion plate lifts the grinding roller upward first. In this process, the grinding roller will press the spring connecting column upward, and then the spring connecting column will provide a reaction force to the grinding roller. When the grinding roller leaves the extrusion plate, the grinding roller will drop due to its own gravity. At the same time, the spring connecting column provides downward pressure to the grinding roller, thereby increasing the pressure of the grinding roller rolling to grind the silicon carbide particles, so that the silicon carbide particles are ground more thoroughly.

[0015] 3. Through the transmission handle, when the driving shaft drives the grinding roller to rotate, the side plate will make the transmission handle rotate toward the inner wall of the coarse screen protective cover, and then the transmission handle drives the transmission gear set inside the coarse screening bin to rotate, and the transmission gear set will drive the take-up roller to rotate, thereby winding the nylon rope on the outside of the take-up roller. At this time, the nylon rope will pull the moving ring bound at one end to move toward the side of the fixed ring, and the fixed ring is fixed on the fixed rod and does not move. Therefore, during the movement of the moving ring, the connecting hinges on the top of the fixed ring and the moving ring will move upward, and push the top plate connected to it to move upward, thereby making the cleaning block on the top of the top plate ejected from the inclined plate, thereby cleaning the silicon carbide particles stuck in the inclined plate, preventing the silicon carbide particles from being stuck in the inclined plate and unable to be rolled and ground by the grinding roller, thereby reducing the waste of raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of a grinding device of the present invention; Figure 2 It is a cross-sectional view of the overall structure of a grinding device of the present invention; Figure 3 A cross-sectional view of the structure of a coarse screening device of a grinding device of the present invention; Figure 4 A schematic diagram of the structure of a coarse screening device of a grinding device of the present invention; Figure 5 It is a schematic diagram of the structure of a fine screen device of a grinding device of the present invention; Figure 6 It is an exploded schematic diagram of a positioning unit structure of a grinding device of the present invention; Figure 7 A cross-sectional view of the coarse screening bin structure of a grinding device of the present invention; Figure 8A schematic diagram of the structure of a crushing unit of a grinding device of the present invention; Fig. 9 It is an exploded schematic diagram of a cleaning unit structure of a grinding device of the present invention; Fig.10 For the present invention Fig. 9 A schematic diagram of the structure enlargement in the middle; Fig.11 It is a schematic diagram of the structure of a fine screening device of a grinding device of the present invention.

[0017] In the figure: 1. Equipment unit; 11. Equipment housing; 12. Base; 13. Servo motor; 14. Drive shaft; 2. Coarse screening equipment; 21. Coarse screening bin; 22. Coarse screening protective cover; 23. Filter trough; 24. Protective ring; 25. Coarse screening collecting bin; 26. Connecting block; 27. Feed pipe; 3. Fine screening equipment; 31. Fine screening connecting plate; 32. Spring connecting column; 33. Spring connecting plate; 34. Side plate; 35. Grinding roller; 36. Grinding ball; 37. Transmission gear; 38. Grinding assembly; 4. Crushing unit; 41. Extrusion plate; 42. Inclined plate; 43. Crushing trough; 44. Top plate; 45. Cleaning block; 5. Positioning unit; 51. Positioning plate; 52. Limit telescopic column; 53. Fixed gear shaft; 54. Gear protection cover; 55. Connecting hole; 56. Limiting ring; 6. Cleaning unit; 61. Transmission handle; 62. Transmission gear set; 63. Take-up roller; 64. Nylon rope; 65. Fixed rod; 66. Fixed ring; 67. Moving ring; 68. Reset spring; 69. Connecting hinge; 7. Fine screening equipment; 71. Fine screening bin; 72. Fine screening grinding device; 73. Material receiving pipe; 74. Fine screening receiving bin; 75. Discharging pipe. DETAILED DESCRIPTION

[0018] 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.

[0019] Example 1, please refer to Figure 1-Figure 11, which is the first embodiment of the present invention, provides a grinding device, which includes an equipment unit 1, a coarse screening device 2, a fine screening device 3, a crushing unit 4, a positioning unit 5, a cleaning unit 6, and a fine screening device 7. The coarse screening device 2 is fixedly arranged inside the equipment unit 1, the fine screening device 3 is movably arranged inside the coarse screening device 2, the crushing unit 4 is arranged at the bottom of the inner wall of the coarse screening device 2, the positioning unit 5 located on one side of the fine screening device 3 is arranged inside the coarse screening device 2, the cleaning unit 6 is arranged around the inside of the coarse screening device 2, and the fine screening device 7 is arranged inside the equipment unit 1 below the coarse screening device 2 Device 7; the device unit 1 includes a device housing 11, a servo motor 13 is provided on the top of the device housing 11, a driving shaft 14 is provided at one end of the servo motor 13 and is located inside the device housing 11, a coarse screening bin 21 is provided inside the device housing 11 and is located outside the driving shaft 14, filter grooves 23 are evenly provided at the bottom of the inner wall of the coarse screening bin 21, a fine screen connecting plate 31 is provided inside the coarse screening bin 21 and is located outside the driving shaft 14, a spring connecting column 32 is provided at the bottom of the fine screen connecting plate 31, a spring connecting plate 33 is provided at the bottom of the spring connecting column 32, and a spring connecting plate 33 is provided at the bottom of the spring connecting column 32. A side plate 34 is provided at the bottom, a grinding roller 35 is provided inside the side plate 34, grinding balls 36 are evenly provided on the outside of the grinding roller 35, a transmission gear 37 is provided on the outside of the side plate 34 and is located on one side of the drive shaft 14 and connected to the grinding roller 35, a grinding assembly 38 is provided on the outside of the drive shaft 14, a positioning plate 51 is provided in the middle of the coarse screening bin 21 and is located on the outside of the drive shaft 14, a limiting telescopic column 52 is provided inside the positioning plate 51, a fixed gear shaft 53 is provided on the top of the limiting telescopic column 52, and a gear protection cover 54 is provided inside the positioning plate 51 and is located on the outside of the fixed gear shaft 53; The servo motor 13 drives the driving shaft 14 to rotate, and the driving shaft 14 drives the fine screen connecting plate 31, the spring connecting column 32, and the spring connecting plate 33 to rotate in turn, thereby driving the grinding roller 35 to rotate in the coarse screening bin 21, and the grinding balls 36 rotate synchronously with the transmission gear 37. The coarse screening bin 21 and the positioning plate 51 are fixed in the equipment housing 11 and do not move. The limiting telescopic column 52 connects the fixed gear shaft 53 to the top of the positioning plate 51. When the gear protection cover 54 rises, it will drive the fixed gear shaft 53 to rise synchronously. When the gear protection cover 54 rotates, the fixed gear shaft 53 is fixed by the limiting telescopic column 52.

[0020] Among them, by starting the servo motor 13, the servo motor 13 drives the driving shaft 14 to start rotating. First, the driving shaft 14 drives the fine screen connecting plate 31 inside the coarse screening bin 21 to start rotating, and the fine screen connecting plate 31 drives the spring connecting column 32, the spring connecting plate 33, and the side plate 34 at the bottom thereof to rotate in turn, thereby driving the grinding roller 35 inside the side plate 34 to rotate in the coarse screening bin 21, and then rolling and grinding the silicon carbide particles. At this time, the spring connecting column 32 will push the spring connecting plate 33 and the grinding roller 35 at the bottom thereof to squeeze against the surface of the coarse screening bin 21, thereby increasing the pressure of the grinding roller 35 on the silicon carbide particles, so that the silicon carbide particles are crushed more thoroughly. When the elastic force of the spring connecting column 32 is large enough, the grinding roller 35 will be squeezed. 5 slides on the surface of the coarse screening bin 21, so that the silicon carbide particles cannot be rolled and ground. The coarse screening bin 21 and the positioning plate 51 in the middle of the top are fixed inside the equipment housing 11, and the transmission gear 37 passes through the connecting hole 55 and meshes with the fixed gear shaft 53. Then, when the grinding roller 35 is driven by the driving shaft 14 and squeezed by the spring connecting column 32, so that the grinding roller 35 slides on the surface of the coarse screening bin 21 around the driving shaft 14, the fixed gear shaft 53 will rotate the transmission gear 37 meshed with it, and then the transmission gear 37 drives the grinding roller 35 at one end thereof to rotate between the two side plates 34, so as to roll and grind the silicon carbide particles on the surface of the coarse screening bin 21, thereby improving the grinding efficiency of the grinding roller 35 on the silicon carbide particles; It is particularly noted that the filter grooves 23 may be evenly arranged on the surface of the coarse screening bin 21 or may be equidistantly arranged, and the size of the filter grooves 23 is adapted to the requirements of the silicon carbide raw material required for the silicon carbide ceramic powder.

[0021] Furthermore, a connecting hole 55 matching the size of the transmission gear 37 is provided on the outer side of the gear protection cover 54. The transmission gear 37 passes through the gear protection cover 54 and meshes with the fixed gear shaft 53. A circular ring corresponding to the limiting ring 56 is provided at the inner bottom of the gear protection cover 54, and the inner diameter of the circular ring is larger than the distance between the limiting telescopic column 52 and the center of the driving shaft 14. Therefore, when the gear protection cover 54 rises, the gear protection cover 54 can drive the fixed gear shaft 53 to rise together. When the transmission gear 37 drives the gear protection cover 54 to rotate, the gear protection cover 54 will not interfere with the fixed gear shaft 53. At the same time, the gear protection cover 54 protects the fixed gear shaft 53 and the transmission gear 37 to prevent the silicon carbide particles rolled and ground by the grinding roller 35 from blocking the meshing of the two and damaging the equipment, thereby increasing the stability and service life of the equipment.

[0022] Furthermore, a coarse screen protective cover 22 located above the fine screen connecting plate 31 is provided at the top of the coarse screening bin 21, a protective ring 24 located on the outside of the drive shaft 14 is provided at the bottom of the coarse screening bin 21, a connecting block 26 is provided on the outside of the protective ring 24, and a coarse screen collecting bin 25 located at the bottom of the coarse screening bin 21 is provided on the outside of the connecting block 26. The interior of the coarse screen collecting bin 25 is inclined, and the top of the coarse screening bin 21 is covered by the coarse screen protective cover 22, so as to prevent the silicon carbide particles ground by the grinding roller 35 from splashing around and causing waste of raw materials. The coarse screen collecting bin 25 collects the silicon carbide particles dropped from the filter trough 23, and the interior of the coarse screen collecting bin 25 is inclined, so that the ground silicon carbide powder collected by the coarse screen collecting bin 25 will enter the next grinding process along the center low point of the coarse screen collecting bin 25.

[0023] Furthermore, the crushing unit 4 includes an extrusion plate 41 arranged at the bottom of the inner wall of the coarse screening bin 21, and crushing grooves 43 are evenly opened on the top of the extrusion plate 41. A top plate 44 located inside the coarse screening bin 21 is provided at the bottom of the extrusion plate 41, and a cleaning block 45 matched with the size of the crushing groove 43 is provided on the top of the top plate 44. The grinding roller 35 is first lifted upward by the extrusion plate 41. During this process, the grinding roller 35 will squeeze the spring connecting column 32 upward, and then the spring connecting column 32 will provide a reaction force to the grinding roller 35. When the grinding roller 35 leaves the extrusion plate 41, the grinding roller 35 will drop due to its own gravity. At the same time, the spring connecting column 32 provides downward pressure to the grinding roller 35, thereby increasing the pressure of the grinding roller 35 rolling and grinding the silicon carbide particles, so that the silicon carbide particles are ground more thoroughly.

[0024] Furthermore, inclined plates 42 are provided on both sides of the extrusion plate 41, and the shape of the inclined plates 42 is a right triangle. The inclined plates 42 enable the grinding roller 35 to slowly squeeze the spring connecting column 32 on its top and rotate with the driving shaft 14. At the same time, the slope of the inclined plates 42 reduces the silicon carbide particles pushed on both sides thereof, thereby reducing the waste of raw materials and reducing its production cost.

[0025] Furthermore, the cleaning unit 6 includes a transmission handle 61 arranged on the inner and outer sides of the coarse screening bin 21, one end of the transmission handle 61 is provided with a transmission gear set 62 located inside the coarse screening bin 21, the inside of the coarse screening bin 21 is provided with a take-up roller 63 meshing with the transmission gear set 62, the outside of the take-up roller 63 is provided with a nylon rope 64, the inside of the coarse screening bin 21 is provided with a fixed rod 65 located below the top plate 44, the outside of the fixed rod 65 is provided with a fixed ring 66, the outside of the fixed rod 65 is provided with a moving ring 67 located on one side of the fixed ring 66, and the top of the moving ring 67 is provided with a connecting hinge 69. When the driving shaft 14 drives the grinding roller 35 to rotate, the side plate 34 causes the transmission handle 61 to rotate toward the inner wall of the coarse screening protective cover 22, and then the transmission handle 61 drives the transmission gear set 62 inside the coarse screening bin 21 to rotate, and the transmission gear set 62 drives the take-up roller 63 to rotate, thereby winding the nylon rope 64 on the outside of the take-up roller 63. At this time, the nylon rope 64 will pull the moving ring 67 bound at one end thereof to move toward the side of the fixed ring 66, and the fixed ring 66 is fixed on the fixed rod 65 and does not move. Therefore, during the movement of the moving ring 67, the fixed ring 66 and the connecting hinge 69 on the top of the moving ring 67 will move upward, and push the top plate 44 connected thereto to move upward, thereby causing the cleaning block 45 on the top of the top plate 44 to be ejected from the inclined plate 42, thereby cleaning the silicon carbide particles stuck in the inclined plate 42, and preventing the silicon carbide particles from being stuck in the inclined plate 42 and unable to be rolled and ground by the grinding roller 35.

[0026] Furthermore, a return spring 68 is provided on the outer side of the fixed rod 65 and is located between the fixed ring 66 and the movable ring 67. One end of the connecting hinge 69 is connected to the bottom of the top plate 44. There are at least two groups of take-up rollers 63, fixed rods 65, and movable rings 67, and the two groups of movable rings 67 are connected to each other. One end of the nylon rope 64 is connected to the outer sides of the two groups of movable rings 67. When the grinding roller 35 leaves the transmission handle 61, the elastic force of the return spring 68 itself causes the movable ring 67 to move away from the fixed ring 66, thereby causing the fixed ring 67 to move away from the fixed ring 66. 6. The connecting hinge 69 on the top of the movable ring 67 moves downward and resets, so that the top plate 44 descends, and the cleaning block 45 is flush with the crushing groove 43 in the extrusion plate 41. At the same time, the take-up roller 63 rotates to drive the nylon rope 64 to be reeled up, and then the two groups of movable rings 67 connected to the nylon rope 64 are moved, so that the connecting hinge 69 rises and pushes the top plate 44 on its top to be ejected upward, so that the cleaning block 45 on the top of the top plate 44 cleans the silicon carbide particles stuck in the crushing groove 43, further reducing the waste of raw materials.

[0027] Furthermore, a receiving pipe 73 is provided at the bottom of the coarse screening bin 21, a fine screening bin 71 is provided at the bottom of the receiving pipe 73, a fine screening grinding device 72 located outside the driving shaft 14 is provided inside the fine screening bin 71, a fine screening receiving bin 74 is provided at the bottom of the fine screening bin 71, a discharge pipe 75 is provided on one side of the fine screening receiving bin 74, and a base 12 is provided at the bottom of the equipment housing 11, and the silicon carbide particle powder falling into the coarse screening receiving bin 25 is guided by the receiving pipe 73 to move to the surface of the fine screening bin 71, and is rotated by the fine screening grinding device 72 for secondary grinding until the silicon carbide particles are The powder meets the requirements for preparing silicon carbide ceramics. After grinding, the silicon carbide particle powder that meets the requirements will pass through the filter holes on the fine screening bin 71 and fall onto the fine screening collecting bin 74, and the fine screening collecting bin 74 is the same as the coarse screening collecting bin 25. Then, the silicon carbide particle powder falls into the discharge pipe 75 under the action of gravity and is discharged and collected. It should be noted that the surface of the fine screening bin 71 is also evenly provided with filter grooves 23, but the aperture size of this filter groove 23 is smaller than the aperture size of the filter groove 23 opened on the surface of the coarse screening bin 21. The structure of the fine screening grinding device 72 is the same as that of the fine screening equipment 3.

[0028] During use, the staff selects silicon carbide particles of appropriate composition according to the composition of silicon carbide raw materials in the silicon carbide bulletproof ceramics to be prepared, and pours the silicon carbide particles into the feed pipe 27. At this time, the silicon carbide particles will enter the top of the coarse screening bin 21 along the inclined tube of the feed pipe 27. At this time, the servo motor 13 is started, and the servo motor 13 drives the drive shaft 14 to start rotating. First, the drive shaft 14 drives the fine screen connecting plate 31 on the inner side of the coarse screening bin 21 to start rotating, and the fine screen connecting plate 31 drives the spring connecting column 32, the spring connecting plate 33, and the side plate 34 at the bottom thereof to rotate in turn, thereby driving the grinding roller 35 inside the side plate 34 to rotate inside the coarse screening bin 21, and then rolling and grinding the silicon carbide particles. At this time, the spring connecting column 32 will push the spring connecting plate 33 and the grinding roller 35 at the bottom thereof to squeeze against the surface of the coarse screening bin 21, thereby improving the grinding roller 35 on the carbon The pressure of the silicon carbide particles makes the silicon carbide particles be crushed more thoroughly. When the elastic force of the spring connecting column 32 is large enough, the grinding roller 35 will be squeezed to slide on the surface of the coarse screening bin 21, so that the silicon carbide particles cannot be rolled and ground. The coarse screening bin 21 and the positioning plate 51 in the middle of the top are fixed inside the equipment housing 11, and the transmission gear 37 passes through the connecting hole 55 and meshes with the fixed gear shaft 53. Then, when the grinding roller 35 is driven by the driving shaft 14 and squeezed by the spring connecting column 32, so that the grinding roller 35 slides on the surface of the coarse screening bin 21 around the driving shaft 14, the fixed gear shaft 53 will rotate the transmission gear 37 meshed with it, and then the transmission gear 37 drives the grinding roller 35 at one end thereof to rotate between the two side plates 34, so as to roll and grind the silicon carbide particles on the surface of the coarse screening bin 21, thereby improving the grinding efficiency of the grinding roller 35 on the silicon carbide particles; When the grinding roller 35 is driven by the driving shaft 14 to approach the extrusion plate 41, some of the silicon carbide particles that are not rolled and ground by the grinding roller 35 will be pushed toward the extrusion plate 41 by the grinding roller 35, and then the silicon carbide particles collide with the crushing groove 43 to be crushed, and some of the silicon carbide particles will pass through the extrusion plate 41 and fall on the inclined plate 42 on the other side of the extrusion plate 41. When the grinding roller 35 rolls to the inclined plate 42, since the inclined plate 42 is a right-angled triangle, it will squeeze the grinding roller 35 to gradually move upward and squeeze the spring connecting column 32 at its top, and the spring connecting column 32 will generate a reaction force on the grinding roller 35 until the grinding roller 35 moves to When the extrusion plate 41 is on the inclined plate 42 on the other side, the spring connection column 32 will reversely squeeze the grinding roller 35 at its bottom, thereby increasing the pressure of the grinding roller 35 rolling and grinding the silicon carbide particles, so that the silicon carbide particles are ground more thoroughly. At the same time, since the grinding roller 35 moves upward, the transmission gear 37 at one end of the grinding roller 35 will drive the gear protection cover 54 on its outer side to move upward, so that the gear protection cover 54 drives the fixed gear shaft 53 and moves upward along the limiting telescopic column 52, so that the fixed gear shaft 53 is continuously meshed with the transmission gear 37, so that the grinding roller 35 continuously rolls and grinds the silicon carbide particles. Next, when the grinding roller 35 is about to leave the extrusion plate 41, the side plate 34 on the outside of the grinding roller 35 will contact the transmission handle 61. When the driving shaft 14 drives the grinding roller 35 to rotate, the side plate 34 will cause the transmission handle 61 to rotate toward the inner wall of the coarse screening protection cover 22, and then the transmission handle 61 drives the transmission gear set 62 inside the coarse screening bin 21 to rotate, and the transmission gear set 62 will drive the take-up roller 63 to rotate, thereby reeling the nylon rope 64 on the outside of the take-up roller 63. At this time, the nylon rope 64 will pull the movable ring 67 bound at one end thereof toward the fixed ring 66. The fixing ring 66 is fixed on the fixing rod 65 and does not move. Therefore, during the movement of the moving ring 67, the fixing ring 66 and the connecting hinge 69 on the top of the moving ring 67 will move upward, and push the top plate 44 connected thereto to move upward, so that the cleaning block 45 on the top of the top plate 44 is ejected from the inclined plate 42, thereby cleaning the silicon carbide particles stuck in the inclined plate 42, preventing the silicon carbide particles from being stuck in the inclined plate 42 and unable to be rolled and ground by the grinding roller 35, further improving the grinding efficiency of the silicon carbide particles. When the fixing ring 66 and the moving ring 67 are separated, the return spring 68 between the fixing ring 66 and the moving ring 67 will press the moving ring 67 in the opposite direction to separate the two, thereby causing the top plate 44 connected to the top of the hinge 69 to move downward to restore to its original position. In the process of the moving ring 67 moving away from the fixing ring 66, the moving ring 67 will drive the nylon rope 64 on its outer side to move, and then the nylon rope 64 will drive the take-up roller 63 to rotate outward to release the wire. At the same time, the take-up roller 63 drives the transmission gear set 62 to rotate and reset the transmission handle 61. In the process of resetting the return spring 68, the take-up roller 63 drives the transmission gear set 62 to rotate and reset the transmission handle 61. The gear set 62 requires a certain amount of force to rotate and reset the transmission handle 61, and then the transmission handle 61, the transmission gear set 62, and the take-up roller 63 successively generate reaction forces on the nylon rope 64, so that the nylon rope 64 tightly pulls the moving ring 67, resulting in the reset spring 68 being unable to completely reset, so that the nylon rope 64 between the take-up roller 63 and the moving ring 67 is always in a taut state, so that the next time the grinding roller 35 passes by, the top plate 44 can be moved upward again to clean the extrusion plate 41, thereby increasing the stability of the equipment and the comfort of the staff; The crushed silicon carbide particles will pass through the filter trough 23, and the silicon carbide particle powder that meets the requirements will pass through the filter trough 23 and fall on the surface of the coarse screening receiving bin 25, and the interior of the coarse screening receiving bin 25 is inclined, so that the silicon carbide particle powder moves to the protective ring 24 under the action of gravity and falls into the receiving pipe 73, and then the silicon carbide particle powder falls along the receiving pipe 73 to the surface of the fine screening bin 71. At this time, the driving shaft 14 drives the fine screening grinding device 72 to rotate, and performs secondary grinding and crushing on the silicon carbide particle powder on the surface of the fine screening bin 71, so that the silicon carbide particle powder further meets the requirements for preparing silicon carbide ceramics. After the grinding is completed, the silicon carbide particle powder that meets the requirements will pass through the filter holes on the fine screening bin 71 and fall on the fine screening receiving bin 74, and the fine screening receiving bin 74 is the same as the coarse screening receiving bin 25, and then the silicon carbide particle powder falls into the discharge pipe 75 under the action of gravity and is discharged and collected.

[0029] Example 2, a grinding device and an energy-saving grinding method for producing silicon carbide bulletproof ceramic powder, using a grinding device in Example 1.

[0030] 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. A grinding device, comprising an equipment unit (1), characterized in that: A coarse screening device (2) is fixedly provided inside the equipment unit (1), a fine screening device (3) is movably provided inside the coarse screening device (2), a crushing unit (4) is provided at the bottom of the inner wall of the coarse screening device (2), a positioning unit (5) is provided inside the coarse screening device (2) and is located on one side of the fine screening device (3), cleaning units (6) are provided around the inside of the coarse screening device (2), and a fine screening device (7) is provided inside the equipment unit (1) and is located below the coarse screening device (2); A drive shaft (14) is movably provided inside the equipment unit (1), a fixed gear shaft (53) is movably provided outside the drive shaft (14), the fixed gear shaft (53) is fixedly connected to the coarse screening equipment (2), a fine screen connecting plate (31) is fixedly provided outside the drive shaft (14), a grinding roller (35) is fixedly provided at the bottom of the fine screen connecting plate (31), a transmission gear (37) is fixedly provided on one side of the grinding roller (35), and the transmission gear (37) is meshingly connected to the fixed gear shaft (53); A coarse screening bin (21) is fixedly arranged inside the equipment unit (1), and the crushing unit (4) comprises an extrusion plate (41) arranged at the bottom of the inner wall of the coarse screening bin (21), crushing grooves (43) are evenly arranged on the top of the extrusion plate (41), and a top plate (44) located inside the coarse screening bin (21) is arranged at the bottom of the extrusion plate (41), and a cleaning block (45) whose size matches that of the crushing groove (43) is arranged on the top of the top plate (44).

2. A grinding device according to claim 1, characterized in that: The equipment unit (1) comprises an equipment housing (11), a servo motor (13) is provided on the top of the equipment housing (11), a driving shaft (14) located inside the equipment housing (11) is provided at one end of the servo motor (13), filter grooves (23) are evenly provided on the bottom of the inner wall of the coarse screening bin (21), a spring connecting column (32) is provided on the bottom of the fine screening connecting plate (31), a spring connecting plate (33) is provided on the bottom of the spring connecting column (32), a side plate (34) is provided on the bottom of the spring connecting plate (33), and the side plate A grinding roller (35) is provided inside the grinding roller (34), grinding balls (36) are evenly provided outside the grinding roller (35), a grinding assembly (38) is provided outside the driving shaft (14), a positioning plate (51) is provided in the middle of the coarse screening bin (21) and is located outside the driving shaft (14), a limiting telescopic column (52) is provided inside the positioning plate (51), a fixed gear shaft (53) is provided on the top of the limiting telescopic column (52), and a gear protection cover (54) is provided inside the positioning plate (51) and is located outside the fixed gear shaft (53).

3. A grinding device according to claim 2, characterized in that: A connecting hole (55) having a size matching that of the transmission gear (37) is provided on the outer side of the gear protection cover (54); the transmission gear (37) passes through the gear protection cover (54) and meshes with the fixed gear shaft (53).

4. A grinding device according to claim 3, characterized in that: The top of the coarse screening bin (21) is provided with a coarse screening protection cover (22) located above the fine screening connection plate (31); the bottom of the coarse screening bin (21) is provided with a protection ring (24) located outside the driving shaft (14); the outside of the protection ring (24) is provided with a connection block (26); the outside of the connection block (26) is provided with a coarse screening material receiving bin (25) located at the bottom of the coarse screening bin (21); the inside of the coarse screening material receiving bin (25) is inclined.

5. A grinding device according to claim 4, characterized in that: Inclined plates (42) are provided on both sides of the extrusion plate (41), and the shape of the inclined plates (42) is a right triangle.

6. A grinding device according to claim 5, characterized in that: The cleaning unit (6) comprises a transmission handle (61) arranged on the inside and outside of the coarse screening bin (21); one end of the transmission handle (61) is provided with a transmission gear set (62) located inside the coarse screening bin (21); a take-up roller (63) meshing with the transmission gear set (62) is provided inside the coarse screening bin (21); a nylon rope (64) is provided on the outside of the take-up roller (63); a fixing rod (65) located below the top plate (44) is provided inside the coarse screening bin (21); a fixing ring (66) is provided on the outside of the fixing rod (65); a moving ring (67) located on one side of the fixing ring (66) is provided on the outside of the fixing rod (65); a connecting hinge (69) is provided on the top of the moving ring (67).

7. A grinding device according to claim 6, characterized in that: A return spring (68) is provided on the outer side of the fixing rod (65) and is located between the fixing ring (66) and the moving ring (67). One end of the connecting hinge (69) is connected to the bottom of the top plate (44).

8. A grinding device according to claim 7, characterized in that: The number of the wire take-up roller (63), the fixed rod (65), and the movable ring (67) is at least two groups, and the two types of movable rings (67) are connected to each other, and one end of the nylon rope (64) is respectively connected to the outer sides of the two groups of movable rings (67).

9. A grinding device according to claim 8, characterized in that: A material receiving pipe (73) is provided at the bottom of the coarse screening bin (21), a fine screening bin (71) is provided at the bottom of the material receiving pipe (73), a fine screening grinding device (72) located outside the drive shaft (14) is provided inside the fine screening bin (71), a fine screening material receiving bin (74) is provided at the bottom of the fine screening bin (71), a material discharge pipe (75) is provided on one side of the fine screening material receiving bin (74), and a base (12) is provided at the bottom of the equipment housing (11).

10. An energy-saving grinding method for producing silicon carbide bulletproof ceramic powder, using a grinding device as described in any one of claims 1 to 9.

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