Ultrafine grinder with adjustable fineness

Abstract

The ultrafine grinder comprises a machine box, a grinding mechanism, a driving mechanism and a feeding mechanism, the grinding mechanism comprises a support, a grinding bin and a grinding cavity cover, a grinding cavity is formed in the grinding bin, a feeding port for communicating the feeding mechanism with the grinding cavity is formed in the rear end of the grinding bin, a discharging port is formed in the grinding cavity cover, and the driving mechanism is arranged on the supporting seat. A crushing disc is arranged in the crushing cavity, a plurality of crushing blades are arranged on the crushing disc, and the driving mechanism is connected with the crushing disc; an adjusting assembly used for locking and unlocking the crushing cavity cover in a circumferential rotation mode is arranged on the crushing cavity cover, and the crushing bin is connected with the adjusting assembly through a hinge assembly, so that the crushing cavity cover has an opening position for opening the crushing bin and a closing position for closing the crushing bin when moving; the crushing bin is further provided with a plurality of locking assemblies used for locking the crushing cavity cover to the closed position. Under the condition that the crushing cavity cover does not need to be replaced, the position of the discharging hole can be changed, so that the fineness of discharged powder is adjusted, and the use is very convenient.

Description

Technical Field

[0001] The invention relates to the technical field of powder making equipment, in particular to an ultra-fine pulverizer with adjustable fineness. Background Art

[0002] Ultrafine pulverizer is a kind of equipment used for fine grinding of materials. The working principle of ultrafine pulverizer is that mechanical crushing and gas collision are used to achieve the purpose of finished products. The crushed materials enter the classification area with the airflow, and the classifier is used to sort out the required material fineness. The coarse materials that are not selected return to the grinding chamber to continue grinding until they are crushed to the required fineness, and then are sorted out by the classifier. The airflow carrying fine powder is sent to the cyclone separator to separate the fine powder from the airflow.

[0003] The Chinese invention patent application number CN202110886181.2 previously applied by the present applicant discloses a novel ultrafine pulverizer, which includes a fixed seat, a support, a pulverizing mechanism, a transmission mechanism, a feeding mechanism, and a cyclone separation drum. When the pulverizer is in operation, the material to be pulverized is automatically transported to the pulverizing chamber by the action of the feeding mechanism and the transmission mechanism. The pulverizing disk in the pulverizing chamber rotates at high speed under the drive of the transmission mechanism. The blades on the pulverizing disk and the multi-deformable holes on the inner gear ring collide, shear, and beat the material. The pulverized material enters the cyclone separation drum through the discharge hole for collection. However, the powder is ejected from the discharge hole by centrifugal force. Since the position of the discharge hole on the pulverizing chamber cover is fixed, the fineness of the ejected powder is basically specific. When the working requirement of the discharged powder fineness needs to be changed, the purpose can be achieved by replacing the pulverizing chamber cover with a different discharge hole position. However, such operation is very troublesome and requires the use of pulverizing chamber covers of different specifications, which is very inconvenient to use. Summary of the Invention

[0004] The object of the present invention is to provide an ultrafine pulverizer with adjustable fineness. The present invention can change the position of the discharge hole without replacing the pulverizing chamber cover, thereby realizing the adjustment of the discharge powder fineness, and is very convenient to use.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an ultrafine pulverizer with adjustable fineness, comprising a chassis, a pulverizing mechanism arranged on the chassis, a driving mechanism providing a power source for the pulverizing mechanism, and a feeding mechanism for inputting raw materials into the pulverizing mechanism, the pulverizing mechanism comprising a support, a pulverizing bin arranged on the support, and a pulverizing chamber cover which is openable and closable and is arranged at the front end opening of the pulverizing bin, the pulverizing chamber being provided in the pulverizing bin, a feeding port for connecting the feeding mechanism with the pulverizing chamber at the rear end of the pulverizing bin, a discharging port connected with the pulverizing chamber cover, a pulverizing disk being provided in the pulverizing chamber, a plurality of pulverizing blades being provided on the pulverizing disk, the driving mechanism being connected to the pulverizing disk for driving the pulverizing disk to rotate; the pulverizing chamber cover being provided with an adjusting assembly for locking and unlocking the pulverizing chamber cover for circumferential rotation, and the pulverizing bin being connected to the adjusting assembly by a hinge assembly, so that the pulverizing chamber cover has an open position for opening the pulverizing bin and a closed position for closing the pulverizing bin when it is movable, and the pulverizing bin is also provided with a plurality of locking assemblies for locking the pulverizing chamber cover in the closed position.

[0006] By adopting the above technical solution and setting an adjustment component, the crushing chamber cover can rotate circumferentially relative to the crushing bin, thereby realizing the change of the position of the discharge port. Since the particles performing constant-speed rotational motion on the vertical plane are at the same distance from the rotation center, the particles are finer at the lower position and coarser at the upper position, and the particles become coarser from bottom to top along the circumference. Therefore, by changing the position of the discharge port, the fineness of the discharged powder can be adjusted, and the adjustment operation does not require replacing the crushing chamber cover, and the use and operation are very convenient.

[0007] The present invention is further configured such that the hinge assembly includes a hinge seat and a connecting plate, the hinge seat is arranged on the side of the crushing bin, the hinge seat is hinged to the connecting plate through a hinge shaft, and the end of the connecting plate away from the hinge seat is connected to the adjustment assembly.

[0008] By adopting the above technical solution, the hinged structure is simple and reliable, which is conducive to assembly and production.

[0009] The present invention is further configured as follows: the adjustment component includes a locking shaft and a locking handle, the locking shaft includes a connecting section, a limiting section and a screw section, the cross-section of the limiting section is non-circular, a limiting step is formed between the limiting section and the connecting section, the connecting section is connected to the crushing chamber cover, the limiting step is abutted against one end of the connecting plate close to the crushing chamber cover, a limiting hole with a cross-section equivalent to that of the limiting section is provided on the connecting plate, the limiting section is penetrated into the limiting hole, the locking handle is threadedly connected to the screw section, and when the locking handle is tightened and the locking shaft drives the crushing chamber cover to approach the connecting plate, the crushing chamber cover is locked.

[0010] By adopting the above technical solution, when the locking handle is tightened, the locking handle drives the crushing chamber cover to press it against the connecting plate, thereby locking and fixing the crushing chamber cover. When the position of the discharge port of the crushing chamber cover needs to be adjusted, it is only necessary to loosen the locking handle, cancel the pre-tightening force between the crushing chamber cover and the connecting plate, and rotate the crushing chamber cover to adjust the position of the discharge port on the crushing chamber cover. The adjustment operation is very convenient and there is no need to disassemble the crushing chamber cover.

[0011] The present invention is further configured such that the adjustment assembly also includes a cover flange, which is sleeved on the outer periphery of the connecting section of the locking shaft, and a connecting sleeve is provided on the outer end surface of the crushing chamber cover. The cover flange is connected to the end surface of the connecting sleeve through a fastener, and a limiting plate is provided at one end of the connecting section close to the crushing chamber cover. The diameter of the limiting plate is larger than the diameter of the connecting section, and the limiting plate is restricted in the connecting sleeve by the cover flange, and the outer circular surface of the limiting plate fits with the inner circular surface of the connecting sleeve.

[0012] By adopting the above technical solution, a linkage connection between the locking shaft and the crushing chamber cover can be achieved, so that the crushing chamber cover can move axially with the locking shaft, and the crushing chamber cover can rotate circumferentially around the center line of the locking shaft, so that when the locking handle is adjusted, the crushing chamber cover can be locked or released for rotation.

[0013] The present invention is further configured such that the length of the connecting sleeve is greater than the length of the limiting plate.

[0014] By adopting the above technical solution, that is, the clearance fit between the two, not only is it easy to install, but the crushing chamber cover can be rotated by only slightly loosening the locking handle, which is more conducive to the rotation operation of the crushing chamber cover.

[0015] The present invention is further configured such that the adjustment assembly further includes a lock nut, the lock nut is threadedly connected to the outer periphery of the screw section of the locking shaft, and the lock nut is tightly abutted against an end of the locking handle away from the connecting plate.

[0016] By adopting the above technical solution, the thread friction force of the locking handle when tightening can be improved, thereby preventing the locking handle from loosening when the machine is working, causing the crushing chamber cover to rotate and the discharge powder fineness to change.

[0017] The present invention is further configured as follows: the locking assembly includes a fixed seat, a locking rod and a release handle; the fixed seat is installed on the crushing bin; a long hole is provided on the fixed seat extending radially along the crushing bin; the locking rod is arranged close to the outer circular surface of the crushing bin; one end of the locking rod is provided with an adjusting screw passing through the long hole and threadedly engaged with the release handle; the other end of the locking rod is provided with a hook-shaped locking portion; an annular boss is provided on the outer end surface of the crushing chamber cover near the outer edge; the hook-shaped locking portion is buckled on the annular boss; the open end of the crushing bin is provided with a sealing ring for forming a sealing fit with the crushing chamber cover.

[0018] By adopting the above technical solution, when the tightening handle is tightened, the hook-shaped locking part of the locking rod can tighten the crushing chamber cover to the open end of the crushing bin. Since the hook-shaped locking part on the locking rod fits with the annular boss of the crushing chamber cover, the locking rod can be prevented from being unhooked outward; and the locking rod of the crushing chamber cover can be swung outward when the crushing chamber cover is opened (a long hole is provided on the fixing seat), so it does not affect the opening of the cover.

[0019] The present invention is further configured such that the crushing disk divides the interior of the crushing chamber into a large crushing chamber and a small crushing chamber, a crushing channel connecting the large crushing chamber and the small crushing chamber is provided between the outer circular surface of the crushing disk and the inner circular surface of the crushing chamber, and the crushing blades include a plurality of large blades distributed in a circular array on the side of the crushing disk corresponding to the large crushing chamber, and a plurality of small blades distributed in a circular array on the side of the crushing disk corresponding to the small crushing chamber.

[0020] By adopting the above technical solution, when the crushing disk rotates, the material is initially crushed in the large crushing chamber (also called primary crushing), and the particles that have been initially crushed to a certain fineness are transferred to the small crushing chamber for further crushing (also called secondary crushing) through the rotating airflow generated by the crushing blades on the crushing disk. The powder that has been crushed to a certain fineness in the small crushing chamber is driven by centrifugal force and rotating wind and discharged to the outside through the discharge hole processed on the crushing chamber cover. The powder discharged to the outside is collected by the collecting system. It is a self-priming structure, does not require external blowing and suction, and has the advantage of lower energy consumption.

[0021] The present invention is further configured as follows: the driving mechanism includes a driving motor, a transmission assembly, a main shaft and a sleeve; the driving motor is mounted on a chassis; the sleeve is connected to one end of the crushing bin away from the crushing chamber cover; the main shaft is arranged in the sleeve, and one end of the main shaft is connected to the output end of the driving motor through the transmission assembly; the other end of the main shaft extends into the crushing bin and is linked to the crushing disk.

[0022] By adopting the above technical solution, power can be provided to the crushing disk, driving the crushing disk to rotate stably.

[0023] The application is further provided with the feeding mechanism, which comprises a feeding hopper, a feeding motor and a stirring wheel.

[0024] By adopting the above technical scheme, the quantitative feeding of the material can be realized, and the feeding speed can be adjusted by controlling the rotating speed of the feeding motor.

[0025] The application is further provided with the adjusting assembly, which comprises an adjusting shaft, a gland, a locking ring, a switching button and a spring.

[0026] By adopting the above technical scheme, the second setting mode of the adjusting assembly is adopted, the switching button is pressed (i.e. gripped with force), the switching knob is inwardly retracted, the locking protrusion on the switching button is separated from the locking groove on the locking ring, the adjusting shaft is rotated to drive the crushing cavity cover to rotate, the position of the discharging port on the crushing cavity cover is adjusted, the switching knob is released, the switching knob is outwardly moved under the action of the spring force until the locking protrusion on the switching button is matched with the locking groove on the locking ring, at this time, the crushing cavity cover is locked and cannot be rotated, the adjusting operation is very convenient, and the crushing cavity cover does not need to be disassembled. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1This is a schematic diagram of the powder's rotational motion in the grinding chamber; Figure 2 This is a schematic diagram of the overall structure when the discharge port is located at the top and the crushing chamber cover is closed in Example 1; Figure 3 This is a schematic diagram of the overall structure when the discharge port is located at the top and the crushing chamber cover is open in Example 1; Figure 4 for Figure 2 Cross-sectional view of the structure; Figure 5 for Figure 4 A schematic diagram of the enlarged structure of the middle part A; Figure 6 Schematic diagram of the structure of the locking assembly in Example 1; Figure 7 This is the overall front view of Example 1 when the discharge port is located at the upper part; Figure 8 This is the overall front view of Example 1 when the discharge port is located in the middle; Figure 9 This is the overall front view of Example 1 when the discharge port is located in the middle; Figure 10 Schematic diagram of the matching structure of the crushing chamber cover, adjustment assembly and connecting plate in Example 2; Figure 11 for Figure 10 A partial magnified view of the structure; Figure 12 Schematic diagram of the matching structure between the adjustment shaft and the crushing chamber cover in Example 2; Figure 13 for Figure 10 Cross-sectional view of the structure; Figure 14 for Figure 13 A partial enlarged view of the structure.

[0028] In the figure: 1. chassis; 2. crushing mechanism; 3. driving mechanism; 4. feeding mechanism; 5. support; 6. crushing bin; 7. crushing chamber cover; 8. crushing chamber; 9. feeding port; 10. discharging port; 11. crushing blade; 12. adjusting assembly; 13. hinge assembly; 14. locking assembly; 15. hinge seat; 16. connecting plate; 17. hinge shaft; 18. locking shaft; 19. locking handle; 20. connecting section; 21. limiting section; 22. screw section; 23. limiting step; 24. limiting hole; 25. cover flange; 26. connecting sleeve; 27. limiting disk; 28. anti-loosening nut; 29. ​​fixing seat; 30. locking rod; 31. loosening handle; 32. long hole; 33. adjusting screw; 34. hook-shaped locking part; 35. Annular boss; 36. Sealing ring; 37. Large crushing chamber; 38. Small crushing chamber; 39. Crushing channel; 40. Large blade; 41. Small blade; 42. Drive motor; 43. Transmission assembly; 44. Main shaft; 45. Bushing; 46. Feed hopper; 47. Feed motor; 48. Digging wheel; 49. Adjusting shaft; 50. Pressure cover; 51. Locking ring; 52. Switch button; 53. Spring; 54. Limiting disc; 55. Middle shaft section; 56. Operating section; 57. Limiting groove; 58. Linking protrusion; 59. Linking groove; 60. Shaft hole; 61. Locking groove; 62. Guide groove; 63. Middle hole; 64. Hook-shaped elastic block; 65. Limiting block; 66. Locking protrusion; 67. Crushing disc; 68. Air inlet. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0030] Before implementation, the effect of centrifugal force on a rotating object is explained. Centrifugal force is a force that moves a rotating object away from the center of rotation. There are three factors that affect the magnitude of this force: the mass of the object, the rotation speed (angular velocity) of the object, and the rotation radius. When particles rotate in a cylindrical container, the particle trajectory is that the coarse particles are outside and the relatively fine particles are inside. When an object rotates at a constant speed on a horizontal plane, its centrifugal force remains unchanged. However, when an object rotates at a constant speed on a vertical plane, the centrifugal force changes because the material is affected by gravity. The main theoretical basis proposed by this invention is the change in the particle trajectory when a particle rotates at a constant speed on a vertical plane. The formula is F = mω²r (mass x angular velocity squared x radius). The direction of the centrifugal force is always perpendicular to the tangent direction of the rotating object (the normal direction of the outward rotation trajectory). For ease of implementation, please refer to the attached Figure 1 ; The simulation diagram of the position change of the powder particles during the rotational motion in the grinding chamber 8 (must be a vertical plane). It can be seen from the simulation diagram that when the particles perform constant speed rotational motion on the vertical plane, their running trajectory is a deformed elliptical shape. When a particle performs constant speed rotational motion on a vertical plane with a constant mass, because the particle is affected by gravity, the particle is closest to the rotation center when it is at the top and farthest from the rotation center when it is at the bottom. This is because when the particle rotates to the top position, gravity has the greatest effect on the particle, and gravity and centrifugal force act in opposite directions, so the relative centrifugal force is the smallest. On the contrary, gravity and centrifugal force act in the same direction when the particle is at the bottom, so the centrifugal force is the largest. When the rotating particle performs rotational motion on a vertical plane, the centrifugal force gradually increases from the top to the bottom of the rotation center. According to the centrifugal force formula, when the mass and running speed remain unchanged, the increase in centrifugal force will simultaneously cause the distance between the particle and the rotation center, that is, the increase in the rotation radius. Attached Figure 1 The simulation diagram shows that gravity has no effect on the centrifugal force when the particles are horizontal. It has a negative effect on the centrifugal force when the particles are above the horizontal plane, and a positive effect when the particles are below the horizontal plane. Based on this theory, it can be concluded that for particles rotating at a constant speed on a vertical plane at the same distance from the center of rotation, the particles at the bottom are finer and those at the top are coarser, and vice versa. According to this theory, when comparing the fineness of particles rotating on the same circle, the particles are finest at the bottom and coarsest at the top, with the particles becoming finer and coarser as they move upwards.

[0031] Example 1: As shown in the attached Figures 2 to 9The adjustable fineness ultrafine pulverizer shown, including the machine box 1, the crushing mechanism 2 provided on the machine box 1, the driving mechanism 3 for providing power source for the crushing mechanism 2 and the feeding mechanism 4 for inputting raw materials for the crushing mechanism 2, the crushing mechanism 2 includes the support 5, the crushing bin 6 provided on the support 5 and the crushing cavity cover 7 which is openably provided at the front end opening of the crushing bin 6, the crushing bin 6 is provided with the crushing cavity 8, the rear end of the crushing bin 6 is provided with the feeding port 9 which is connected with the crushing cavity 8 and the feeding mechanism 4, the crushing cavity cover 7 is provided with the discharge port 10 which is connected with the crushing cavity 8, the discharge port 10 is arranged close to the outer edge of the crushing cavity cover 7, the crushing cavity 8 is provided with the crushing disc 67, the crushing disc 67 is provided with a plurality of crushing blades 11, the driving mechanism 3 is connected with the crushing disc 67 for driving the crushing disc 67 to rotate; the crushing cavity cover 7 is provided with the adjusting assembly 12 for locking and unlocking the circumferential rotation of the crushing cavity cover 7, and the crushing bin 6 is connected with the adjusting assembly 12 through the hinged assembly 13, so that the crushing cavity cover 7 has the opening position of opening the crushing bin 6 and the closing position of closing the crushing bin 6 when the crushing cavity cover 7 moves, and the crushing bin 6 is also provided with a plurality of locking assemblies 14 for locking the crushing cavity cover 7 in the closing position. By setting the adjusting assembly 12, the crushing cavity cover 7 can rotate circumferentially relative to the crushing bin 6, so as to change the position of the discharge port 10, because the particles in the vertical plane do equal-speed rotary motion at the same distance from the rotary center, the particles are finer in the lower position and coarser in the upper position, and the particles are coarser from the lower position to the upper position along the circumference, therefore, by changing the position of the discharge port 10, the fineness adjustment of the discharged powder can be realized, and the adjusting operation does not need to replace the crushing cavity cover 7, and the use and operation are very convenient.

[0032] As shown in the accompanying Figure 2 The hinged assembly 13 includes the hinged seat 15 and the connecting plate 16, the hinged seat 15 is arranged on the side of the crushing bin 6 and can be fixed on the side of the crushing bin 6 by welding or screw connection, the hinged seat 15 is hinged with the connecting plate 16 through the hinge shaft 17, and the end of the connecting plate 16 away from the hinged seat 15 is connected with the adjusting assembly 12. The hinged structure is simple and reliable, and is beneficial to assembly production.

[0033] As shown in the accompanying Figure 4 and the accompanying Figure 5As shown, the adjusting assembly 12 comprises a locking shaft 18 and a locking handle 19, the locking shaft 18 is large inside and small outside, the locking shaft 18 comprises a connecting section 20, a limiting section 21 and a screw section 22, the cross section of the limiting section 21 is non-circular, the limiting section 21 of the embodiment adopts a square shape, the limiting step 23 is formed between the limiting section 21 and the connecting section 20, the connecting section 20 is connected with the crushing cavity cover 7, the limiting step 23 abuts against one end of the connecting plate 16 close to the crushing cavity cover 7, the limiting hole 24 with a square cross section is formed in the connecting plate 16, the limiting section 21 is arranged in the limiting hole 24, the locking handle 19 is threadedly connected with the screw section 22, that is, the middle part of the locking handle 19 has a screw hole matched with the screw section 22, when the locking handle 19 is screwed and the crushing cavity cover 7 is driven by the locking shaft 18 to abut against the connecting plate 16, the locking of the crushing cavity cover 7 is realized. When the locking handle 19 is screwed, the crushing cavity cover 7 is pressed on the connecting plate 16 by the locking handle 19, the locking of the crushing cavity cover 7 is realized, when the position of the discharge port 10 of the crushing cavity cover 7 needs to be adjusted, the locking handle 19 is loosened, the pre-tightening force between the crushing cavity cover 7 and the connecting plate 16 is cancelled, the crushing cavity cover 7 is rotated, and the position of the discharge port 10 on the crushing cavity cover 7 is adjusted, the adjustment operation is very convenient, and the crushing cavity cover 7 does not need to be disassembled.

[0034] As shown in the accompanying drawings, Figure 5 The adjusting assembly 12 further comprises a cover flange 25, the cover flange 25 is sleeved on the outer periphery of the connecting section 20 of the locking shaft 18, the outer end surface of the crushing cavity cover 7 is provided with a connecting sleeve 26, the cover flange 25 is connected to the end surface of the connecting sleeve 26 by a fastener (which can be a hexagonal screw), one end of the connecting section 20 close to the crushing cavity cover 7 is provided with a limiting disc 27, the diameter of the limiting disc 27 is greater than that of the connecting section 20, the limiting disc 27 is limited in the connecting sleeve 26 by the cover flange 25, and the outer circular surface of the limiting disc 27 is fitted with the inner circular surface of the connecting sleeve 26. This design can realize the linkage connection between the locking shaft 18 and the crushing cavity cover 7, so that the crushing cavity cover 7 can move axially along the locking shaft 18, and the crushing cavity cover 7 can rotate circumferentially around the center line of the locking shaft 18, so that when the locking handle 19 is adjusted, the locking or loosening of the crushing cavity cover 7 can be realized.

[0035] The length of the connecting sleeve 26 is greater than that of the limiting disc 27. That is, the gap between them is matched, which not only facilitates installation, but also only needs to slightly loosen the locking handle 19, and the crushing cavity cover 7 can be rotated, which is more conducive to the rotation operation of the crushing cavity cover 7.

[0036] As shown in the accompanying drawings, Figure 5As shown, the adjustment assembly 12 also includes a lock nut 28, which is threadedly connected to the outer periphery of the screw segment 22 of the locking shaft 18 and abuts against the end of the locking handle 19 away from the connecting plate 16. This design increases the thread friction applied to the locking handle 19 when tightening, preventing the locking handle 19 from loosening during operation, which could cause the grinding chamber cover 7 to rotate and change the fineness of the discharged powder.

[0037] As attached Figure 2 and attached Figure 6 As shown, in this embodiment, the number of the locking assemblies 14 is three groups, and the three groups of locking assemblies 14 are evenly distributed on the outer circumference of the crushing bin 6 in a circular array. The locking assembly 14 includes a fixing seat 29, a locking rod 30 and a release handle 31. The fixing seat 29 can be fixed to the crushing bin 6 by welding or screw connection. A long hole 32 is provided on the fixing seat 29 extending radially along the crushing bin 6. The locking rod 30 is arranged close to the outer circumferential surface of the crushing bin 6. One end of the locking rod 30 is provided with an adjusting screw 33 passing through the long hole 32 and threadedly engaged with the release handle 31. The center of the release handle 31 has a screw hole that cooperates with the adjusting screw 33. The other end of the locking rod 30 is provided with a hook-shaped locking portion 34. The outer end surface of the crushing chamber cover 7 is provided with an annular boss 35 near the outer edge. The hook-shaped locking portion 34 is snapped on the annular boss 35. The open end of the crushing bin 6 is provided with a sealing ring 36 for forming a sealing fit with the crushing chamber cover 7. When the elastic handle 31 is tightened, the hook-shaped locking portion 34 of the locking rod 30 can tighten the pulverizing chamber cover 7 to the open end of the pulverizing bin 6. Since the hook-shaped locking portion 34 on the locking rod 30 fits with the annular boss 35 of the pulverizing chamber cover 7, the locking rod 30 can be prevented from being unhooked outward; and the locking rod 30 of the pulverizing chamber cover 7 can be swung outward when the pulverizing chamber cover 7 is opened (a long hole 32 is provided on the fixing seat 29), so it does not affect the opening of the cover.

[0038] As attached Figure 5As shown, the pulverizing disc 67 divides the interior of the pulverizing chamber 8 into a large pulverizing chamber 37 and a small pulverizing chamber 38. A pulverizing channel 39 connecting the large pulverizing chamber 37 and the small pulverizing chamber 38 is provided between the outer circular surface of the pulverizing disc 67 and the inner circular surface of the pulverizing chamber 8. The pulverizing blades 11 include a plurality of large blades 40 distributed in a circular array on the side of the pulverizing disc 67 corresponding to the large pulverizing chamber 37, and a plurality of small blades 41 distributed in a circular array on the side of the pulverizing disc 67 corresponding to the small pulverizing chamber 38. When the crushing disk 67 rotates, the material is initially crushed in the large crushing chamber 37 (also called primary crushing). The particles that have been initially crushed to a certain fineness are transferred to the small crushing chamber 38 for further crushing (also called secondary crushing) through the rotating airflow generated by the crushing blades 11 on the crushing disk 67. The powder that has been crushed to a certain fineness in the small crushing chamber 38 is discharged to the outside through the discharge hole processed on the crushing chamber cover 7 under the push of centrifugal force and rotating wind. The powder discharged to the outside is collected by the collecting system. It is a self-priming structure, does not require external blowing and suction, and has the advantage of lower energy consumption.

[0039] As attached Figure 4 As shown, the drive mechanism 3 includes a drive motor 42, a transmission assembly 43, a main shaft 44, and a sleeve 45. The drive motor 42 is mounted on the chassis 1. The sleeve 45 is connected to the end of the shredding chamber 6 away from the shredding chamber cover 7. The main shaft 44 is disposed within the sleeve 45. Both ends of the sleeve 45 have bearings for supporting the main shaft 44. One end of the main shaft 44 is connected to the output end of the drive motor 42 via the transmission assembly 43. The transmission assembly 43 can be a conventional belt transmission assembly (belt and pulley combination structure) or a chain transmission assembly 43 (sprocket and chain combination structure). The other end of the main shaft 44 extends into the shredding chamber 6 and is interlocked with the shredding disk 67. The drive motor 42 can be a variable speed motor. It provides power to the shredding disk 67, driving the shredding disk 67 to rotate stably.

[0040] As attached Figure 4 As shown, the feeding mechanism 4 includes a feed hopper 46, a feed motor 47, and a paddle wheel 48. The paddle wheel 48 is a structure with a cylindrical middle portion and a plurality of paddle plates distributed in a circular array on the outer periphery. It is a mass-produced part. The feed hopper 46 is installed on the crushing bin 6, and the lower end of the feed hopper 46 is connected to the feed port 9 of the crushing bin 6. An air inlet 68 is provided at the lower end of the inlet hopper 46. The paddle wheel 48 is provided in the feed hopper 46 near the bottom outlet. The feed motor 47 is provided on the side of the feed hopper 46. The feed motor 47 can be a servo motor, and the motor shaft of the feed motor 47 extends into the feed hopper 46 and is linked to the paddle wheel 48. It can realize the quantitative supply of materials, and the feeding speed can be adjusted by controlling the speed of the feed motor 47.

[0041] Embodiment 2: Different from embodiment 1, the structure of the adjustment component 12 in this embodiment is different from that in embodiment 1. Figures 10-14 As shown, the adjustment assembly 12 of this embodiment includes an adjustment shaft 49, a pressure cover 50, a locking ring 51, a switch button 52 and a spring 53. The adjustment shaft 49 includes a limiting disc 54 with decreasing diameters, a middle shaft section 55 and an operating section 56. A limiting groove 57 is provided on the end surface of the crushing chamber cover 7. The pressure cover 50 is sleeved on the outer periphery of the middle shaft section 55. The pressure cover 50 is connected to the crushing chamber cover 7 by a fastener (the fastener can be a hexagon socket screw) and limits the limiting disc 54 in the limiting groove 57. The inner diameter of the limiting groove 57 is 0. The surface is provided with a plurality of linkage protrusions 58, and the outer circumference of the limiting disc 54 is provided with a plurality of linkage grooves 59 that fit with the linkage protrusions 58; the connecting plate 16 is provided with an axial hole 60 for the operating section 56 to pass through, the locking ring 51 is sleeved on the outer circumference of the operating section 56, and the locking ring is connected to the connecting plate 16 by a fastener (the fastener can be a hexagon socket screw), and the inner circumference of the locking ring 51 is provided with a plurality of locking grooves 61 distributed in a circumferential array. The number of the switching button 52 is two, and the upper and lower operating sections 56 are connected. A guide groove 62 is provided at each end for the corresponding switch button 52 to slide into, and a middle hole 63 is provided on the operating section 56 to connect the two guide grooves 62. The spring 53 is passed through the middle hole 63, and the two ends of the spring 53 are respectively in contact with the inner ends of the two switch buttons 52. A hook-shaped elastic block 64 is provided on both sides of the switch button 52. The cross section of the hook-shaped elastic block 64 is a right triangle with an inclined surface close to the guide groove 62. The hook-shaped elastic block 64 can be deformed by force. The wall is provided with a limit block 65 for limiting the outer stroke of the hook-shaped elastic block 64. The cross-section of the limit block 65 is a right triangle with an inclined upper end. The outer end of the switch button 52 is provided with a locking protrusion 66 for matching with the corresponding locking groove 61 on the locking ring 51. The inner end of the locking protrusion 66 abuts against the outer end of the locking ring 51 to form a limit. When the switch button 52 slides in the guide groove 62, it has an unlocking position in which the locking protrusion 66 is disengaged from the locking groove 61 and a locking position in which the locking protrusion 66 matches the locking groove 61. By pressing the switch button 52 (i.e., holding it firmly), the switch knob retracts inward, so that the locking protrusion 66 on the switch button 52 disengages from the locking groove 61 on the locking ring 51. The adjusting shaft 49 is rotated to drive the crushing chamber cover 7 to rotate, thereby adjusting the position of the discharge port 10 on the crushing chamber cover 7. The switch knob is released, and the switch knob moves outward under the action of the spring 53 until the locking protrusion 66 on the switch button 52 fits into the locking groove 61 on the locking ring 51. At this time, the crushing chamber cover 7 is locked and cannot rotate. The adjustment operation is very convenient, and there is no need to disassemble the crushing chamber cover 7.

Claims

1. An adjustable fineness ultrafine pulverizer, comprising a chassis (1), a pulverizing mechanism (2) arranged on the chassis (1), a driving mechanism (3) providing a power source for the pulverizing mechanism (2), and a feeding mechanism (4) for inputting raw materials into the pulverizing mechanism (2), wherein the pulverizing mechanism (2) comprises a support (5), a pulverizing bin (6) arranged on the support (5), and a pulverizing chamber cover (7) arranged at the front end opening of the pulverizing bin (6) and capable of being opened and closed, wherein a pulverizing chamber (8) is provided in the pulverizing bin (6), a feed port (9) for connecting the feeding mechanism (4) with the pulverizing chamber (8) is provided at the rear end of the pulverizing bin (6), a discharge port (10) connected to the pulverizing chamber (8) is provided on the pulverizing chamber cover (7), a pulverizing disc (67) is provided in the pulverizing chamber (8), a plurality of pulverizing blades (11) are provided on the pulverizing disc (67), and the driving mechanism (3) is connected to the pulverizing disc (67) for driving the pulverizing disc (67) to rotate; and characterized in that: The crushing chamber cover (7) is provided with an adjustment assembly (12) for locking and unlocking the crushing chamber cover (7) for circumferential rotation, and the crushing chamber (6) is connected to the adjustment assembly (12) via a hinge assembly (13), so that the crushing chamber cover (7) has an open position for opening the crushing chamber (6) and a closed position for closing the crushing chamber (6) when it is movable, and the crushing chamber (6) is further provided with a plurality of locking assemblies (14) for locking the crushing chamber cover (7) in the closed position.

2. The adjustable fineness ultrafine grinder according to claim 1, characterized in that: The hinge assembly (13) comprises a hinge seat (15) and a connecting plate (16). The hinge seat (15) is arranged on the side of the crushing bin (6). The hinge seat (15) is hinged to the connecting plate (16) through a hinge shaft (17). The end of the connecting plate (16) away from the hinge seat (15) is connected to the adjustment assembly (12).

3. The adjustable fineness ultrafine grinder according to claim 2, characterized in that: The adjusting assembly (12) includes a locking shaft (18) and a locking handle (19). The locking shaft (18) includes a connecting section (20), a limiting section (21) and a screw section (22). The cross section of the limiting section (21) is non-circular. A limiting step (23) is formed between the limiting section (21) and the connecting section (20). The connecting section (20) is connected to the pulverizing chamber cover (7). The limiting step (23) is connected to the connecting plate (16). ) is close to one end of the crushing chamber cover (7), and a limiting hole (24) with a cross section equivalent to that of the limiting section (21) is opened on the connecting plate (16). The limiting section (21) is passed through the limiting hole (24). The locking handle (19) is threadedly connected to the screw section (22). When the locking handle (19) is tightened and the locking shaft (18) drives the crushing chamber cover (7) to approach the connecting plate (16), the crushing chamber cover (7) is locked.

4. The adjustable fineness ultrafine grinder according to claim 3, characterized in that: The adjustment assembly (12) further includes a cover flange (25), the cover flange (25) being sleeved on the outer periphery of the connecting section (20) of the locking shaft (18), a connecting sleeve (26) being provided on the outer end surface of the crushing chamber cover (7), the cover flange (25) being connected to the end surface of the connecting sleeve (26) via a fastener, a limiting disk (27) being provided at one end of the connecting section (20) close to the crushing chamber cover (7), the diameter of the limiting disk (27) being larger than the diameter of the connecting section (20), the limiting disk (27) being restricted in the connecting sleeve (26) by the cover flange (25), and the outer circumferential surface of the limiting disk (27) being in contact with the inner circumferential surface of the connecting sleeve (26).

5. The adjustable fineness ultrafine grinder according to claim 4, characterized in that: The length of the connecting sleeve (26) is greater than the length of the limiting plate (27).

6. The adjustable fineness ultrafine grinder according to claim 2, characterized in that: The adjustment assembly (12) further includes a locking nut (28), which is threadedly connected to the outer periphery of the screw section (22) of the locking shaft (18), and the locking nut (28) is tightly abutted against the end of the locking handle (19) away from the connecting plate (16).

7. The adjustable fineness ultrafine grinder according to claim 1, characterized in that: The locking assembly (14) includes a fixing seat (29), a locking rod (30) and a loose handle (31). The fixing seat (29) is installed on the crushing bin (6). A long hole (32) is provided on the fixing seat (29) and extends radially along the crushing bin (6). The locking rod (30) is arranged close to the outer circumferential surface of the crushing bin (6). One end of the locking rod (30) is provided with an adjusting screw (33) that passes through the long hole (32) and is threadedly engaged with the loose handle (31). The other end of the locking rod (30) is provided with a hook-shaped locking portion (34). An annular boss (35) is provided on the outer end surface of the crushing chamber cover (7) near the outer edge. The hook-shaped locking portion (34) is buckled on the annular boss (35). The open end of the crushing bin (6) is provided with a sealing ring (36) for forming a sealing engagement with the crushing chamber cover (7).

8. The adjustable fineness ultrafine grinder according to claim 1, characterized in that: The pulverizing disk (67) divides the interior of the pulverizing chamber (8) into a large pulverizing chamber (37) and a small pulverizing chamber (38). A pulverizing channel (39) communicating the large pulverizing chamber (37) and the small pulverizing chamber (38) is provided between the outer circumferential surface of the pulverizing disk (67) and the inner circumferential surface of the pulverizing chamber (8). The pulverizing blades (11) include a plurality of large blades (40) distributed in a circumferential array on one side of the pulverizing disk (67) corresponding to the large pulverizing chamber (37), and a plurality of small blades (41) distributed in a circumferential array on one side of the pulverizing disk (67) corresponding to the small pulverizing chamber (38).

9. The adjustable fineness ultrafine grinder according to claim 1, characterized in that: The driving mechanism (3) comprises a driving motor (42), a transmission assembly (43), a main shaft (44) and a shaft sleeve (45); the driving motor (42) is mounted on the chassis (1); the shaft sleeve (45) is connected to one end of the crushing bin (6) away from the crushing chamber cover (7); the main shaft (44) is arranged in the shaft sleeve (45); one end of the main shaft (44) is connected to the output end of the driving motor (42) through the transmission assembly (43); the other end of the main shaft (44) extends into the crushing bin (6) and is linked to the crushing disc (67).

10. The adjustable fineness ultrafine grinder according to claim 1, characterized in that: The feeding mechanism (4) comprises a feeding hopper (46), a feeding motor (47) and a paddle wheel (48); the feeding hopper (46) is mounted on the crushing bin (6), and the lower end of the feeding hopper (46) is connected to the feeding port (9) of the crushing bin (6); the paddle wheel (48) is arranged in the feeding hopper (46) near the bottom outlet; the feeding motor (47) is arranged on the side of the feeding hopper (46), and the motor shaft of the feeding motor (47) extends into the feeding hopper (46) and is linked to the paddle wheel (48).

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