A fine grinding device and a grinding method for preparing high-purity barium carbonate

Abstract

The present invention relates to the technical field of grinding equipment, and discloses a fine grinding equipment and a grinding method for preparing high-purity barium carbonate, comprising a main machine, a grinding cylinder and a main shaft installed on the main machine, wherein the main shaft extends into the grinding cylinder and is fixed with a hollow rod pin, and the grinding cylinder is provided with a feed pipe and a discharge pipe. The present invention first drives a scraper to move to the surface of a filter cylinder through a driving component, and then the rotating hollow rod pin drives the scraper to rotate around the filter cylinder through a reduction transmission mechanism, which is conducive to cleaning the mud skin and impurities attached to the filter cylinder without stopping the machine, thereby effectively improving the clogging phenomenon of the filter cylinder, ensuring the discharge efficiency when grinding barium carbonate raw materials, saving maintenance time, and by setting a reduction transmission mechanism, the scraper can rotate around the filter cylinder at a reasonable speed, avoiding the generation of wear or heat caused by high-speed friction, and ensuring the service life of the filter cylinder.

Description

Technical Field

[0001] The invention relates to the technical field of grinding equipment, in particular to fine grinding equipment and a grinding method for preparing high-purity barium carbonate. Background Art

[0002] A sand mill is a common fine grinding equipment with the characteristics of high production efficiency, strong continuity, low cost and high product fineness. The main structure of a common horizontal sand mill is a main machine, a grinding cylinder and a rotatable rod pin. A feed pipe and a discharge pipe are provided on the grinding cylinder, and a filter cylinder is connected to the discharge pipe at one end close to the inside of the grinding cylinder. When in use, the grinding medium and material are injected into the filter cylinder. When the main machine is running, the rod pin inside the grinding cylinder is driven to rotate, so that the grinding medium and the material are thrown, rubbed and collided to achieve the grinding effect. The ground material is discharged through the filter cylinder and the discharge pipe.

[0003] In practical applications, clogging is the most common problem of horizontal sand mills. One of the important reasons is that the filter cartridge is adhered to the surface of the skin or impurities during use, resulting in clogging. After clogging, the discharge efficiency at the output end of the grinding cylinder is reduced, and it is generally necessary to stop the machine for cleaning, which seriously affects the grinding process and reduces the efficiency of the grinding work. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a fine grinding device and a grinding method for preparing high-purity barium carbonate, which have the advantages of not being easily blocked, and solves the problem that the existing sand mill is blocked due to the adhesion of crust or impurities on the grinding cylinder during use, and the grinding efficiency is affected by stopping the machine for cleaning.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a fine grinding device, comprising a main machine, a grinding cylinder and a main shaft installed on the main machine, the main shaft extending into the grinding cylinder and fixed with a hollow rod pin, the grinding cylinder is provided with a feed pipe and a discharge pipe, the discharge pipe is fixed with a filter cylinder at one end close to the inside of the grinding cylinder, the filter cylinder extends into the inside of the hollow rod pin, a rotating ring and a reduction transmission mechanism are also installed inside the hollow rod pin, and a scraper and a driving assembly are installed on the rotating ring;

[0006] The reduction transmission mechanism includes a mounting tube, the scraper is rotatably connected to the mounting tube, the hollow rod pin is transmission-connected to the rotating ring through the reduction transmission mechanism, and the hollow rod pin cooperates with the reduction transmission mechanism to drive the rotating ring to rotate;

[0007] The driving assembly is in driving connection with the rotating ring, and the driving assembly is used to drive the scraper to move to the edge to fit the filter cartridge;

[0008] When the filter cartridge is clogged during the grinding process, the drive assembly operates, forcing the scraper to move and its rear edge to fit the filter cartridge. At the same time, the reduction transmission mechanism operates, and the rotating hollow rod pin drives the rotating ring to rotate through the reduction transmission mechanism, thereby driving the scraper on the rotating ring to rotate around the filter cartridge to scrape off impurities on the surface of the filter cartridge.

[0009] Preferably, the mounting cylinder comprises an outer cylindrical shell and an inner cylindrical shell fixed inside the outer cylindrical shell, the central axis of the outer cylindrical shell coincides with the central axis of the inner cylindrical shell, an opening is arranged on the side of the outer cylindrical shell close to the filter cylinder, the outer cylindrical shell is movably connected to the inner wall of the hollow rod pin through a bearing, a through hole is arranged on the surface of the outer cylindrical shell, the rotating ring is arranged between the outer cylindrical shell and the inner cylindrical shell and is rotatably connected to the outer cylindrical shell, and a worm gear is fixed to the edge of the rotating ring close to the inside of the outer cylindrical shell.

[0010] Preferably, the center axis of the filter cartridge coincides with the center axis of the inner cylindrical shell, the filter cartridge is fixedly connected to one end close to the inner cylindrical shell with a secondary limit tooth ring, and the inner wall of the hollow rod pin is fixedly connected to a main limit tooth ring and a drive tooth ring.

[0011] Preferably, a transverse axis is provided in the inner cylindrical shell, the transverse axis passes through the inner cylindrical shell and is rotatably connected to the inner cylindrical shell, the two sections of the transverse axis are respectively fixedly connected with a main gear and a sub-gear, a main rack is slidably mounted on the outer wall of the outer cylindrical shell, the main rack is meshed with the main gear, a main limit tooth block is fixed at the end of the main rack, the main limit tooth block matches the main limit tooth ring, a sub-rack is slidably mounted on the outer wall of the inner cylindrical shell, the sub-rack is meshed with the sub-gear, a sub-limit tooth block is fixedly connected at the end of the sub-rack, the sub-limit tooth block matches the sub-limit tooth ring, an adjusting motor is fixedly connected inside the inner cylindrical shell, the output shaft of the adjusting motor is fixedly connected with a driving gear, a driven gear is fixedly connected to the middle part of the transverse axis, and the driven gear meshes with the driving gear.

[0012] Preferably, the reduction transmission mechanism also includes a worm, a transverse transmission shaft and a longitudinal transmission shaft arranged in the through hole, one end of the transverse transmission shaft is rotatably connected to the inner wall of the through hole, a driving gear and a first bevel gear are fixedly connected to the transverse transmission shaft, the driving gear is meshed with the driving gear ring, both ends of the longitudinal transmission shaft are rotatably connected to the inner wall of the through hole, a second bevel gear and a short-diameter gear are fixed on the longitudinal transmission shaft, the second bevel gear is meshed with the first bevel gear, the worm is meshed with the worm wheel, both ends of the worm are rotatably connected to the inner wall of the through hole, and a long-diameter gear is also fixedly connected to the worm, and the long-diameter gear is meshed with the short-diameter gear.

[0013] Preferably, the driving assembly includes a strip slider and a driving motor, the strip slider is laterally slidingly connected to the inner wall of the rotating ring, the scraper is installed on the strip slider, the side wall of the strip slider is provided with a pushing rack, the driving motor is fixed on the end face of the rotating ring, and the output shaft of the driving motor is fixed with a pushing gear, and the pushing gear is meshed with the pushing rack.

[0014] Preferably, a strip groove is provided at the bottom of the strip sliding block, the scraper is movably inserted into the strip groove, a spring is further provided inside the strip groove, and two ends of the spring are respectively fixedly connected to the scraper edge and the inner wall of the strip groove.

[0015] Preferably, the scraper is provided with a chamfer at one end close to the filter cartridge, and the chamfer corresponds to the edge position of the end of the filter cartridge.

[0016] The invention also discloses a grinding method for preparing high-purity barium carbonate, using the above-mentioned fine grinding equipment.

[0017] Compared with the prior art, the present invention provides a fine grinding device and a grinding method for preparing high-purity barium carbonate, which has the following beneficial effects:

[0018] 1. This kind of fine grinding equipment and grinding method for preparing high-purity barium carbonate, when it is necessary to clean the filter cartridge, the driving component first drives the scraper to move to the surface of the filter cartridge, and then the rotating hollow rod pin drives the scraper to rotate around the filter cartridge through the reduction transmission mechanism, which is conducive to cleaning the mud and impurities attached to the filter cartridge without stopping the machine, thereby effectively improving the clogging phenomenon of the filter cartridge, ensuring the discharge efficiency of the barium carbonate raw material during grinding, saving maintenance time, and by setting the reduction transmission mechanism, the scraper can rotate around the filter cartridge at a reasonable speed, avoiding wear or heat caused by high-speed friction, and ensuring the service life of the filter cartridge.

[0019] 2. This kind of fine grinding equipment and grinding method for preparing high-purity barium carbonate, by setting a driving component, is conducive to driving the scraper to move to the surface of the filter cartridge when the filter cartridge needs to be cleaned, and then driving the filter cartridge to move and store it in the installation cartridge when it is not necessary to clean it. The scraper in the stored state is separated from the surface of the filter cartridge, thereby avoiding interference with the passage of materials through the filter cartridge, and the probability of contact between the scraper in the stored state and the material and the grinding medium is reduced, resulting in less wear and a longer service life.

[0020] 3. This kind of fine grinding equipment and grinding method for preparing high-purity barium carbonate, by setting strip grooves and springs, and setting chamfers at the ends of the scrapers, when the scrapers move to the surface of the filter cartridge, they fit more closely with the filter cartridge, and then when the scrapers rotate, the cleaning effect on the filter cartridge is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the internal structure of the grinding cylinder of the present invention;

[0022] Figure 2 A three-dimensional structural diagram of a fine grinding device of the present invention;

[0023] Figure 3 A vertical cross-sectional view of the grinding cylinder of the present invention;

[0024] Figure 4 is a transverse cross-sectional view of the hollow rod pin of the present invention;

[0025] Figure 5 It is a schematic structural diagram of the outer cylindrical shell of the present invention;

[0026] Figure 6 For the present invention Figure 5 A magnified view of part A;

[0027] Figure 7 It is a structural schematic diagram of the driving assembly of the present invention;

[0028] Figure 8 It is a vertical cross-sectional view of the rotating ring of the present invention.

[0029] In the figure: 1, main machine; 2, grinding cylinder; 21, feed pipe; 22, discharge pipe; 3, main shaft; 4, hollow rod pin; 41, driving gear ring; 42, main limit gear ring; 5, filter cylinder; 51, auxiliary limit gear ring; 6, rotating ring; 61, worm gear; 7, speed reduction transmission mechanism; 70, mounting cylinder; 701, outer cylindrical shell; 702, inner cylindrical shell; 703, bearing; 704, through hole; 705, horizontal axis; 706, main gear; 707, auxiliary gear; 708, main rack; 709, main limit gear block; 710 , auxiliary rack; 711, auxiliary limit gear block; 712, adjusting motor; 713, driving gear; 714, driven gear; 715, worm; 716, horizontal transmission shaft; 717, longitudinal transmission shaft; 718, driving gear; 719, first bevel gear; 720, second bevel gear; 721, short diameter gear; 722, long diameter gear; 8, scraper; 81, chamfer; 9, driving assembly; 91, strip slider; 92, driving motor; 93, push rack; 94, push gear; 95, strip groove; 96, spring. DETAILED DESCRIPTION

[0030] 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.

[0031] As introduced in the background technology, there are deficiencies in the prior art. In order to solve the above technical problems, the present application proposes a fine grinding device and a grinding method for preparing high-purity barium carbonate.

[0032] Example 1: Please refer to Figure 1-Figure 4 A fine grinding device, comprising a main machine 1, a grinding cylinder 2 and a main shaft 3 mounted on the main machine 1, the main shaft 3 extending into the grinding cylinder 2 and fixed with a hollow rod pin 4, the grinding cylinder 2 is provided with a feed pipe 21 and a discharge pipe 22, the discharge pipe 22 is fixed with a filter cylinder 5 at one end close to the inside of the grinding cylinder 2, the filter cylinder 5 extends into the inside of the hollow rod pin 4, a rotating ring 6 and a reduction transmission mechanism 7 are also installed inside the hollow rod pin 4, and a scraper 8 and a driving component 9 are installed on the rotating ring 6;

[0033] The reduction transmission mechanism 7 includes a mounting tube 70, the scraper 8 is rotatably connected to the mounting tube 70, the hollow rod pin 4 is transmission-connected to the rotating ring 6 through the reduction transmission mechanism 7, and the hollow rod pin 4 cooperates with the reduction transmission mechanism 7 to drive the rotating ring 6 to rotate;

[0034] The driving assembly 9 is in transmission connection with the rotating ring 6, and the driving assembly 9 is used to drive the scraper 8 to move to the edge to fit the filter cartridge 5;

[0035] When the filter cartridge 5 is clogged during the grinding process, the driving assembly 9 operates, forcing the scraper 8 to move its rear edge to fit the filter cartridge 5. At the same time, the reduction transmission mechanism 7 operates, and the rotating hollow rod pin 4 drives the rotating ring 6 to rotate slowly through the reduction transmission mechanism 7, thereby driving the scraper 8 on the rotating ring 6 to rotate around the filter cartridge 5, thereby scraping off impurities on the surface of the filter cartridge 5;

[0036] The filter cartridge 5 is configured as a hollow cylinder, the side of the filter cartridge 5 is configured as a filter surface, the center line of the rotating ring 6 coincides with the center line of the filter cartridge 5, and in the initial state, the scraper 8 is stored inside the mounting cartridge 70;

[0037] When in use, the barium carbonate raw material to be ground is injected into the grinding cylinder 2 through the feed pipe 21. When the main machine 1 is running, the main shaft 3 is driven to rotate, thereby driving the hollow rod pin 4 to rotate, and the grinding medium and the barium carbonate raw material in the grinding cylinder 2 are ground. The ground raw materials are discharged through the filter cylinder 5 and the discharge pipe 22. When the discharge efficiency of the discharge pipe 22 is reduced, the filter cylinder 5 is blocked. At this time, the driving component 9 is started on the basis of the rotation of the hollow rod pin 4. When the driving component 9 is running, the scraper 8 is driven to move in the direction of the grinding cylinder 2, so that the scraper 8 moves to the edge of the filter surface on the filter cylinder 5, and the reduction transmission mechanism 7 is started at the same time. The rotating hollow rod pin 4 drives the rotating ring 6 to rotate at a reasonable speed through the reduction transmission mechanism 7, thereby driving the scraper 8 installed on the rotating ring 6 to rotate around the filter cylinder 5, thereby cleaning the crust or impurities attached to the filter cylinder 5. After the cleaning is completed, the driving component 9 is operated again, forcing the scraper to move and re-stored into the installation cylinder 70;

[0038] By providing the scraper 8, the drive assembly 9 and the reduction transmission mechanism 7, when the filter cartridge 5 needs to be cleaned, the drive assembly 9 first drives the scraper 8 to move to the surface of the filter cartridge 5, and then the rotating hollow rod pin 4 drives the scraper 8 to rotate around the filter cartridge 5 through the reduction transmission mechanism 7, which is beneficial for cleaning the mud and impurities attached to the filter cartridge 5 without stopping the machine, thereby effectively improving the blockage of the filter cartridge 5, ensuring the discharge efficiency of the barium carbonate raw material during grinding, saving maintenance time, and by providing the reduction transmission mechanism 7, the scraper 8 can rotate around the filter cartridge 5 at a reasonable speed, avoiding the generation of wear or heat caused by high-speed friction, and ensuring the service life of the filter cartridge 5.

[0039] Example 2: See Figure 3-Figure 7, which is different from the above embodiment, the installation cylinder 70 includes an outer cylindrical shell 701 and an inner cylindrical shell 702 fixed inside the outer cylindrical shell 701, the central axis of the outer cylindrical shell 701 coincides with the central axis of the inner cylindrical shell 702, the outer cylindrical shell 701 is provided with an opening on the side close to the filter cartridge 5, the outer cylindrical shell 701 is movably connected to the inner wall of the hollow rod pin 4 through a bearing 703, a through hole 704 is provided on the surface of the outer cylindrical shell 701, the rotating ring 6 is sleeved between the outer cylindrical shell 701 and the inner cylindrical shell 702 and is rotatably connected to the outer cylindrical shell 701, a worm gear 61 is fixed to the edge of the rotating ring 6 on one side close to the inside of the outer cylindrical shell 701, and the filter cartridge The central axis of 5 coincides with the central axis of the inner cylindrical shell 702, the filter cartridge 5 is fixedly connected with a secondary limit gear ring 51 at one end close to the inner cylindrical shell 702, the inner wall of the hollow rod pin 4 is fixedly connected with a main limit gear ring 42 and a driving gear ring 41, a transverse axis 705 is arranged in the inner cylindrical shell 702, the transverse axis 705 penetrates the inner cylindrical shell 702 and is rotatably connected to the inner cylindrical shell 702, the two sections of the transverse axis 705 are respectively fixedly connected with a main gear 706 and a secondary gear 707, the outer wall of the outer cylindrical shell 701 is slidably mounted with a main rack 708, the main rack 708 is meshed with the main gear 706, the end of the main rack 708 is fixed with a main limit gear block 709, the main limit gear block 709 Matching with the main limit gear ring 42, the outer wall of the inner cylindrical shell 702 is slidably mounted with a secondary rack 710, the secondary rack 710 meshes with the secondary gear 707, the end of the secondary rack 710 is fixedly connected with a secondary limit gear block 711, the secondary limit gear block 711 matches with the secondary limit gear ring 51, the inner cylindrical shell 702 is fixedly connected with an adjusting motor 712, the output shaft of the adjusting motor 712 is fixedly connected with a driving gear 713, the middle part of the horizontal shaft 705 is fixedly connected with a driven gear 714, the driven gear 714 meshes with the driving gear 713, the reduction transmission mechanism 7 also includes a worm 715, a horizontal transmission shaft 716 and a longitudinal transmission shaft 717 arranged in the through hole 704, One end of the transverse transmission shaft 716 is rotatably connected to the inner wall of the through hole 704, and a driving gear 718 and a first bevel gear 719 are fixedly connected to the transverse transmission shaft 716, and the driving gear 718 is meshed with the driving gear ring 41. Both ends of the longitudinal transmission shaft 717 are rotatably connected to the inner wall of the through hole 704, and a second bevel gear 720 and a short-diameter gear 721 are fixed to the longitudinal transmission shaft 717, and the second bevel gear 720 is meshed with the first bevel gear 719. The worm 715 is meshed with the worm wheel 61, and both ends of the worm 715 are rotatably connected to the inner wall of the through hole 704. A long-diameter gear 722 is also fixedly connected to the worm 715, and the long-diameter gear 722 is meshed with the short-diameter gear 721;

[0040] Among them, the outer wall of the outer cylindrical shell 701 is provided with a slide groove, and the main rack 708 is provided with a slider matching the slide groove to achieve sliding installation. The outer wall of the inner cylindrical shell 702 is also provided with a slide groove, and the auxiliary rack 710 is provided with a slider matching the slide groove to achieve sliding installation. In the initial state, the main fiber tooth block is engaged with the main limit tooth ring 42, and the auxiliary limit tooth block 711 is not engaged with the auxiliary limit tooth ring 51. At this time, the installation cylinder 70 is engaged with the hollow rod pin 4 through the main limit tooth block 709. When the hollow rod pin 4 rotates, it drives the entire installation cylinder 70 to rotate at the same speed. In actual application, the diameter of the short-diameter gear 721 is smaller than the diameter of the long-diameter gear 722.

[0041] When in use, start the adjusting motor 712. When the adjusting motor 712 is running, it drives the driving gear 713 to rotate. When the driving gear 713 rotates, it drives the driven gear 714 to rotate, and then drives the horizontal shaft 705 to rotate. When the horizontal shaft 705 rotates, it also drives the main gear 706 and the sub-gear 707 at both ends to rotate. When the main gear 706 rotates, it drives the main rack 708 to slide, and then drives the main limiting tooth block 709 at the end of the main rack 708 to move, so that the main limiting tooth block 709 disengages from the main limiting tooth ring 42. When the sub-gear 707 rotates, it drives the sub-rack 710 to slide, and then drives the sub-limiting tooth block 711 at the end of the sub-rack 710 to move, so that the sub-limiting tooth block 711 is meshed with the sub-limiting tooth ring 51 on the filter cartridge 5. At this time, the installation cartridge 70 is locked with the sub-limiting tooth ring 51. After closing, it remains stationary. When the hollow rod pin 4 rotates, it cannot drive the internal installation cylinder 70 to rotate. However, when the driving gear ring 41 on the hollow rod pin 4 rotates, it drives the driving gear 718 on the installation cylinder 70 to rotate. When the driving gear 718 rotates, it drives the transverse transmission shaft 716 and the first bevel gear 719 to rotate. When the first bevel gear 719 rotates, it drives the second bevel gear 720 to rotate. When the second bevel gear 720 rotates, it drives the longitudinal transmission shaft 717 and the short-diameter gear 721 to rotate. When the short-diameter gear 721 rotates, it drives the long-diameter gear 722 to rotate. When the long-diameter gear 722 rotates, it drives the worm 715 to rotate. When the worm 715 rotates, it drives the worm wheel 61 to rotate, thereby driving the rotating ring 6 to rotate. When the rotating ring 6 rotates, it drives the scraper to rotate around the filter cylinder 5, thereby achieving a cleaning effect.

[0042] By setting up the reduction transmission mechanism 7, after starting the adjustment motor 712, the installation cylinder 70 engaged with the hollow rod pin 4 is transformed into an engagement with the end of the filter cylinder 5, so that the installation cylinder 70 that previously rotated with the hollow rod pin 4 is turned into a stationary state. In this state, the hollow rod pin 4 drives the rotating ring 6 on the installation cylinder 70 to rotate, and then drives the scraper to rotate, which is conducive to driving the scraper to clean the filter cylinder 5 while the hollow rod pin 4 maintains the grinding state, and the transmission effect of the short-diameter gear 721, the long-diameter gear 722, the worm 715 and the worm wheel 61 can be used to reduce the transmission ratio, so that the rotating ring 6 and the scraper rotate at a relatively low speed, reducing the wear of the scraper on the filter cylinder 5, so as to extend the service life of the filter cylinder 5, and also reduce the heat generated by friction, and reduce the probability of temperature rise and deterioration of the material in the grinding cylinder 2.

[0043] Example 3, see Figure 4 , Figure 7 and Figure 8 , which is different from the above embodiment, the driving assembly 9 includes a strip slider 91 and a driving motor 92, the strip slider 91 is connected to the inner wall of the rotating ring 6 in a transverse sliding manner, the scraper 8 is mounted on the strip slider 91, a push rack 93 is provided on the side wall of the strip slider 91, the driving motor 92 is fixed on the end face of the rotating ring 6, a push gear 94 is fixed on the output shaft of the driving motor 92, and the push gear 94 is meshed with the push rack 93;

[0044] In the initial state, one end of the strip slider 91 extends between the outer cylindrical shell 701 and the inner cylindrical shell 702, and the inner wall of the rotating ring 6 is provided with a transverse sliding groove matching the strip slider 91, so as to realize a transverse sliding connection. When in use, the driving motor 92 runs and drives the push gear 94 to rotate. When the push gear 94 rotates, it drives the push rack 93 and the strip slider 91 to slide transversely, thereby driving the scraper 8 installed on the strip slider 91 to move toward the surface of the filter cylinder 5. Similarly, when the driving motor 92 drives the push gear 94 to rotate in the opposite direction, it can also drive the scraper 8 to be re-stored in the installation cylinder 70;

[0045] By setting up the driving assembly 9, it is advantageous to drive the scraper 8 to move to the surface of the filter cartridge 5 when the filter cartridge 5 needs to be cleaned, and then drive the filter cartridge 5 to move and store it in the mounting cylinder 70 when it does not need to be cleaned. The scraper 8 in the stored state is detached from the surface of the filter cartridge 5, thereby avoiding interference with the passage of materials through the filter cartridge 5. In addition, the probability of the scraper 8 in the stored state contacting the materials and the grinding medium is reduced, resulting in less wear and a longer service life.

[0046] Example 4, see Figure 8, which is different from the above-mentioned embodiment, a strip groove 95 is provided at the bottom of the strip slider 91, and the scraper 8 is movably inserted into the strip groove 95. A spring 96 is also provided inside the strip groove 95, and the two ends of the spring 96 are respectively fixedly connected to the edge of the scraper 8 and the inner wall of the strip groove 95. The scraper 8 is provided with a chamfer 81 at one end close to the filter cartridge 5, and the chamfer 81 corresponds to the edge position of the end of the filter cartridge 5;

[0047] The number of springs 96 is set to be multiple. In the initial state, the springs 96 are at their original length. When in use, the driving assembly 9 drives the strip slider 91 to slide horizontally after operation, thereby driving the scraper 8 to move toward the filter cartridge 5. During the movement of the scraper 8, the chamfer 81 at the end just contacts the edge of the filter cartridge 5. Then, the filter cartridge 5 squeezes the chamfer 81 to move the scraper 8 toward the inside of the strip groove 95 and compresses the spring 96. Finally, after the scraper 8 moves, the bottom edge is attached to the surface of the filter cartridge 5. The pressure of the spring 96 makes the scraper 8 and the filter cartridge 5 fit more closely.

[0048] By providing the strip groove 95 and the spring 96 and providing the chamfer 81 at the end of the scraper 8, when the scraper 8 moves to the surface of the filter cartridge 5, it fits more closely with the filter cartridge 5, and thus when the scraper 8 rotates, the cleaning effect on the filter cartridge 5 is better.

[0049] 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 fine grinding device, comprising a main machine, a grinding cylinder mounted on the main machine and a main shaft, characterized in that: The main shaft extends into the grinding cylinder and is fixed with a hollow rod pin, the grinding cylinder is provided with a feed pipe and a discharge pipe, the discharge pipe is fixed with a filter cylinder at one end close to the inside of the grinding cylinder, the filter cylinder extends into the inside of the hollow rod pin, a rotating ring and a reduction transmission mechanism are also installed inside the hollow rod pin, and a scraper and a driving assembly are installed on the rotating ring; The reduction transmission mechanism includes a mounting tube, the scraper is rotatably connected to the mounting tube, the hollow rod pin is transmission-connected to the rotating ring through the reduction transmission mechanism, and the hollow rod pin cooperates with the reduction transmission mechanism to drive the rotating ring to rotate; The driving assembly is in driving connection with the rotating ring, and the driving assembly is used to drive the scraper to move to the edge to fit the filter cartridge; The mounting cylinder comprises an outer cylindrical shell and an inner cylindrical shell fixed inside the outer cylindrical shell, the central axis of the outer cylindrical shell coincides with the central axis of the inner cylindrical shell, an opening is arranged on the side of the outer cylindrical shell close to the filter cylinder, the outer cylindrical shell is movably connected to the inner wall of the hollow rod pin through a bearing, a through hole is arranged on the surface of the outer cylindrical shell, the rotating ring is sleeved between the outer cylindrical shell and the inner cylindrical shell and is rotatably connected to the outer cylindrical shell, and a worm gear is fixed on the edge of the rotating ring close to the inner side of the outer cylindrical shell; The central axis of the filter cartridge coincides with the central axis of the inner cylindrical shell, the filter cartridge is fixedly connected to one end close to the inner cylindrical shell with a secondary limit tooth ring, and the inner wall of the hollow rod pin is fixedly connected to a main limit tooth ring and a driving tooth ring; A transverse shaft is provided in the inner cylindrical shell, and the transverse shaft passes through the inner cylindrical shell and is rotatably connected to the inner cylindrical shell, and two sections of the transverse shaft are respectively fixedly connected to a main gear and a sub-gear, and a main rack is slidably installed on the outer wall of the outer cylindrical shell, and the main rack is meshed with the main gear, and a main limiting tooth block is fixed on the end of the main rack, and the main limiting tooth block matches the main limiting tooth ring, and a sub-rack is slidably installed on the outer wall of the inner cylindrical shell, and the sub-rack is meshed with the sub-gear, and a sub-limiting tooth block is fixedly connected to the end of the sub-rack, and the sub-limiting tooth block matches the sub-limiting tooth ring, and an adjusting motor is fixedly connected inside the inner cylindrical shell, and an output shaft of the adjusting motor is fixedly connected to a driving gear, and a driven gear is fixedly connected to the middle part of the transverse shaft, and the driven gear is meshed with the driving gear; The reduction transmission mechanism also includes a worm, a transverse transmission shaft and a longitudinal transmission shaft arranged in the through hole, one end of the transverse transmission shaft is rotatably connected to the inner wall of the through hole, a driving gear and a first bevel gear are fixedly connected to the transverse transmission shaft, the driving gear is meshed with the driving gear ring, both ends of the longitudinal transmission shaft are rotatably connected to the inner wall of the through hole, a second bevel gear and a short-diameter gear are fixed on the longitudinal transmission shaft, the second bevel gear is meshed with the first bevel gear, the worm is meshed with the worm wheel, both ends of the worm are rotatably connected to the inner wall of the through hole, the worm is also fixedly connected to a long-diameter gear, and the long-diameter gear is meshed with the short-diameter gear; The driving assembly includes a strip slider and a driving motor, the strip slider is slidably connected to the inner wall of the rotating ring in a transverse manner, the scraper is mounted on the strip slider, a push rack is provided on the side wall of the strip slider, the driving motor is fixed on the end face of the rotating ring, a push gear is fixed to the output shaft of the driving motor, and the push gear is meshed with the push rack; When the filter cartridge is clogged during the grinding process, the drive assembly operates, forcing the scraper to move and its rear edge to fit the filter cartridge. At the same time, the reduction transmission mechanism operates, and the rotating hollow rod pin drives the rotating ring to rotate through the reduction transmission mechanism, thereby driving the scraper on the rotating ring to rotate around the filter cartridge to scrape off impurities on the surface of the filter cartridge.

2. A fine grinding device according to claim 1, characterized in that: A strip groove is arranged at the bottom of the strip sliding block, the scraper is movably inserted into the strip groove, a spring is arranged inside the strip groove, and two ends of the spring are respectively fixedly connected to the edge of the scraper and the inner wall of the strip groove.

3. A fine grinding device according to claim 2, characterized in that: The scraper is provided with a chamfer at one end close to the filter cartridge, and the chamfer corresponds to the edge position of the end of the filter cartridge.

4. A grinding method for preparing high-purity barium carbonate, characterized in that: The grinding method for preparing high-purity barium carbonate uses a fine grinding device as described in any one of claims 1-3.

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