A slurry filtering device and a slurry filtering method for aluminum nitride ceramic production

Abstract

The invention relates to the technical field of slurry filtering, and discloses a slurry filtering device and a slurry filtering method for aluminum nitride ceramic production. Through the arrangement of a filtering component and a discharging component, during the filtering process, a driving ring drives a filter plate to rotate in a gathering disk, so that the slurry dropped from a feed inlet is evenly distributed on the filter plate, thereby accelerating the filtering speed of the slurry, and enabling the filter plate to send filtered impurities to a collecting shovel of the discharging component, and the impurities on the filter plate are shoveled into a discharging trough by the collecting shovel, and the impurities in the discharging trough are discharged from the filter tank by a rotating spiral rod, so that the filter plate can always keep unobstructed filtering slurry during operation, avoiding the need to pause the device after working for a period of time to clean the filtering components in the device, saving time and effort when using the device, thereby improving the filtering efficiency of the device.

Description

Technical Field

[0001] The invention relates to the technical field of slurry filtration, in particular to a slurry filtration device and a slurry filtration method for producing aluminum nitride ceramics. Background Art

[0002] ‌The main component of aluminum nitride ceramic substrate is aluminum nitride (AIN), which is a high-performance ceramic material with excellent thermal conductivity, mechanical strength and high temperature resistance. It is widely used in the electronics, optoelectronics and semiconductor industries. When producing aluminum nitride ceramic substrates, it is necessary to make aluminum nitride powder and other materials into slurry according to the formula, and then filter the slurry to filter out impurities such as undissolved binder particles and agglomerated powder in the slurry;

[0003] Chinese patent CN217489931U discloses a filter for the production of aluminum nitride ceramic substrates. By providing a disassembly and filtering component in the filter tank, it is not only convenient to filter the raw materials, but also convenient to disassemble and maintain them later. However, when filtering the slurry, the filtered impurities will remain in the filter. As the filtering time goes by, the impurities accumulated in the filter will gather more and more. After a period of time, the filter will be filled, making the filter tank unable to work. At this time, it is necessary to suspend production, spend time to disassemble the filter from the filter tank, and after the impurities in the filter are removed, the filter is installed back to the filter tank, so that the suspended filter tank resumes production, so that the production process needs to be suspended many times to clean the filter filled with impurities, which is time-consuming and labor-intensive, thereby reducing production efficiency. In addition, because the aluminum nitride powder in the aluminum nitride ceramic slurry has high activity and a small particle size, the aluminum nitride ceramic slurry stored in the filter tank after filtration is prone to sedimentation, thereby affecting the uniformity and quality of the produced aluminum nitride ceramic substrate. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a slurry filtering device and a slurry filtering method for the production of aluminum nitride ceramics, so as to overcome the above-mentioned technical problems existing in the prior art.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a slurry filtering device, comprising a filter tank and a feed port on one side of the upper end of the filter tank and a discharge port in the middle of the lower end, respectively, characterized in that: a filter assembly, a stirring assembly and a discharge assembly are arranged in the filter tank, the filter assembly comprises a gathering disk and a driving ring, the gathering disk is fixedly installed in the filter tank, the driving ring is connected to the bottom of the gathering disk, a filter plate is fixedly connected to the driving ring, and the driving ring drives the filter plate to rotate under the gathering disk when filtering the slurry, the stirring assembly comprises a driving motor and a stirring shaft, the driving motor is fixedly installed at the top of the filter tank, the upper end of the stirring shaft is rotatably connected to the driving motor, and the The lower end of the stirring shaft extends into the filter tank, passes through the gathering disk and is coaxially fixedly connected to the drive ring. When filtering the slurry, the drive motor drives the stirring shaft to rotate, stirs the filtered slurry in the filter tank, and drives the drive ring. The discharge assembly includes a collecting shovel and a spiral rod. The collecting shovel is fixedly connected to the gathering disk, and its bottom abuts against the upper side of the filter plate. A discharge groove is provided on one side of the collecting shovel. When the filter plate rotates, the collecting shovel shovels impurities on the filter plate into the discharge groove. The spiral rod is rotatably installed in the discharge groove, and the spiral rod is matched with the stirring shaft. When the stirring shaft rotates, the spiral rod is driven to rotate to discharge impurities in the discharge groove.

[0006] Preferably, the stirring assembly further comprises a stirring paddle, which is fixedly connected to the lowermost end of the stirring shaft and is located at the bottom of the filter tank. A transmission bevel gear is coaxially fixedly connected to the stirring shaft, and the transmission bevel gear is located in the gathering disk.

[0007] Preferably, the gathering disk includes an outer bevel ring and a connecting piece, the outer side of the outer bevel ring is fixedly connected to the inner wall of the filter tank, the inner side of the outer bevel ring is an inwardly inclined slope, the connecting piece is in the shape of a boss, coaxially rotatably connected to the stirring shaft, the connecting piece and the outer bevel ring are located on the same horizontal plane, a plurality of circularly distributed fixing rods are arranged between the outer bevel ring and the connecting piece, the two ends of the fixing rods are respectively fixedly connected to the inner side of the outer bevel ring and the outer side of the connecting piece, the space enclosed between the outer bevel ring and the connecting piece is funnel-shaped, and the feed port is located between the outer bevel ring and the connecting piece.

[0008] Preferably, a plurality of comb teeth are fixedly connected to the lower side of the fixing rod, the comb teeth are evenly arranged under the fixing rod, and a gap for impurities to pass through is left between the bottom ends of the comb teeth and the upper side of the filter plate.

[0009] Preferably, a plurality of support rods are evenly distributed in a circular shape on the driving ring, and a plurality of the support rods are fixedly connected to the driving ring. The driving ring and the plurality of support rods are a whole and are rotatably connected to the inner side of the outer oblique ring. The plurality of support rods support the filter plate on the driving ring, and a plurality of filter holes for filtering out impurities are provided on the filter plate.

[0010] Preferably, the two ends of the collecting shovel are respectively fixedly connected to the inner side of the outer bevel ring and the outer side of the connecting piece, and are located on one side of the feed port, between the two fixed rods, and the outward end of the discharge trough extends to the outside of the outer bevel ring and reaches the inner wall of the filter tank. The end of the spiral rod facing the stirring shaft is coaxially fixedly connected with a transmission rod, and the transmission rod passes through the collecting shovel and the connecting piece and extends to the top of the transmission bevel gear. A driven bevel gear is rotatably installed on the transmission rod, and the driven bevel gear is meshed on one side of the transmission bevel gear. A block groove and a mounting groove are sequentially opened on the collecting shovel, and the block groove and the mounting groove are located between the shovel head of the collecting shovel and the discharge trough.

[0011] Preferably, the discharge assembly also includes a supporting plate, one end of the supporting plate is fixedly connected with an arc-shaped stopper, the arc-shaped stopper is movably installed in the stopper groove, the bottom of the supporting plate is fixedly connected with a rotating shaft, the rotating shaft is rotatably installed in the installation groove, and both ends of the rotating shaft are sleeved with torsion springs, the torsion springs drive the supporting plate to remain horizontal on the collecting shovel, and there is a certain distance between the other end of the supporting plate and the discharge trough, so that impurities scooped up by the collecting shovel can enter the discharge trough.

[0012] Preferably, a discharge port connected to the discharge trough is provided on one side of the filter tank, and a connecting seat is provided on the filter tank. The connecting seat is fixedly connected to the outside of the filter tank and symmetrically distributed on both sides of the discharge port of the filter tank. A locking groove is provided on the connecting seat, and a collecting box is installed on the connecting seat. A discharge valve is fixedly installed at the lower end of the discharge port.

[0013] Preferably, both sides of the collection box are fixedly connected with a card block, and the collection box is engaged in the engagement groove through the card block and is detachably installed on the connecting seat. The collection box is provided with a notch on the side facing the filter tank, corresponding to the discharge port of the filter tank. A sealing cover is installed on the upper end of the collection box, and two handles are symmetrically fixedly connected to the upper side of the sealing cover.

[0014] Preferably, a slurry filtration method for aluminum nitride ceramic production uses a slurry filtration device.

[0015] Compared with the prior art, the present invention provides a slurry filtering device and a slurry filtering method for aluminum nitride ceramic production, which have the following beneficial effects:

[0016] 1. The slurry filtering equipment and the slurry filtering method for aluminum nitride ceramic production, through the arrangement of the filtering assembly and the discharging assembly, during the filtering process, the driving ring drives the filter plate to rotate in the gathering disk, so that the slurry dropped from the feed inlet is evenly distributed on the filter plate, the filtering speed of the slurry is accelerated, and the filter plate sends the filtered impurities to the collecting shovel of the discharging assembly, the impurities on the filter plate are shoveled into the discharging trough by the collecting shovel, and the impurities in the discharging trough are discharged from the filter tank by the rotating spiral rod, so that the filter plate can always keep the filtering slurry unobstructed during operation, avoiding the need to stop the equipment after working for a period of time to clean the filtering components in the equipment, saving time and effort when using the equipment, thereby improving the filtering efficiency of the equipment.

[0017] 2. The slurry filtering equipment and the slurry filtering method for the production of aluminum nitride ceramics, through the setting of the support plate, during the process of the discharge component discharging impurities, the support plate limits the amount of impurities entering the discharge trough, preventing excessive accumulation of impurities that exceed the range that the discharge trough and the spiral rod can bear, causing the discharge component to be paralyzed, thereby ensuring that the discharge component can continue to operate when the equipment is working, thereby further improving the filtration efficiency of the equipment.

[0018] 3. The slurry filtering equipment and the slurry filtering method for aluminum nitride ceramic production, through the setting of the stirring component, in the process of filtering the slurry, the driving motor drives the stirring shaft to rotate, so that the stirring paddle fully stirs the slurry stored at the bottom of the filter tank to prevent the slurry stored at the bottom of the filter tank from settling, thereby ensuring the uniformity and quality of the produced aluminum nitride ceramic substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a right side cross-sectional structural schematic diagram of the present invention;

[0020] Figure 2 It is a front cross-sectional structural schematic diagram of some components of the present invention;

[0021] Figure 3 It is a schematic diagram of the right structure of the present invention;

[0022] Figure 4 It is a schematic diagram of the structure of some components such as the filtering component and the stirring component of the present invention;

[0023] Figure 5 It is a schematic diagram of the left structure of the present invention;

[0024] Figure 6 It is a partial structural schematic diagram of the discharge assembly of the present invention;

[0025] Figure 7 It is a schematic diagram of the cross-sectional structure of the collecting shovel of the present invention;

[0026] Figure 8 It is a partial structural schematic diagram of the bearing plate of the present invention.

[0027] In the figure: 1. filter tank; 11. feed port; 12. discharge port; 13. connecting seat; 131. snap-fit ​​groove; 2. filter assembly; 21. gathering disk; 211. outer oblique ring; 212. connecting piece; 213. fixing rod; 2131. combing teeth; 22. driving ring; 221. supporting rod; 23. filter plate; 3. stirring assembly; 31. driving motor; 32. stirring shaft; 321. transmission bevel gear; 33. stirring paddle; 4. discharge assembly; 41. collecting shovel; 411. discharge trough; 412. block groove; 413. mounting groove; 42. spiral rod; 421. transmission rod; 43. driven bevel gear; 5. bearing plate; 51. rotating shaft; 52. arc block; 53. torsion spring; 6. collecting box; 61. block; 62. sealing cover; 621. handle; 7. discharge valve. DETAILED DESCRIPTION

[0028] 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.

[0029] Embodiment 1

[0030] See also Figure 1-Figure 8A slurry filtering device comprises a filter tank 1 and a feed inlet 11 and a discharge outlet 12 respectively provided at one side of the upper end of the filter tank 1 and at the middle of the lower end. A filter assembly 2, a stirring assembly 3 and a discharge assembly 4 are arranged in the filter tank 1. The filter assembly 2 comprises a gathering disk 21 and a driving ring. The gathering disk 21 is fixedly installed in the filter tank 1. The driving ring is connected to the bottom of the gathering disk 21. A filter plate 23 is fixedly connected to the driving ring 22. When filtering the slurry, the driving ring 22 drives the filter plate 23 to rotate under the gathering disk 21. The stirring assembly 3 comprises a driving motor 31 and a stirring shaft 32. The driving motor 31 is fixedly installed at the top of the filter tank 1. The upper end of the stirring shaft 32 is rotationally connected to the driving motor 31, and the lower end of the stirring shaft 32 extends into the filter tank 1. The collecting disk 21 passes through the collecting disk 21 and is coaxially fixedly connected with the driving ring. When filtering the slurry, the driving motor 31 drives the stirring shaft 32 to rotate, stirs the filtered slurry in the filter tank 1, and drives the driving ring 22. The discharge assembly 4 includes a collecting shovel 41 and a screw rod 42. The collecting shovel 41 is fixedly connected in the collecting disk 21, and its bottom is in contact with the upper side of the filter plate 23. A discharge groove 411 is provided on one side of the collecting shovel 41. When the filter plate 23 rotates, the collecting shovel 41 shovels the impurities on the filter plate 23 into the discharge groove 411. The screw rod 42 is rotatably installed in the discharge groove 411, and the screw rod 42 is matched with the stirring shaft 32 for transmission. When the stirring shaft 32 rotates, it drives the screw rod 42 to rotate to discharge the impurities in the discharge groove 411.

[0031] When in use, the drive motor 31 is first started, and the drive motor 31 drives the stirring shaft 32 to rotate in the filter tank 1. At this time, the discharge port 12 is in a closed state, and then the slurry is discharged into the filter tank 1 from the feed port 11. The slurry entering the filter tank 1 through the feed port 11 will fall onto the filter plate 23 in the gathering disk 21. The filter plate 23 filters the slurry to separate the impurities in the slurry from the slurry, so that the impurities remain on the filter plate 23, and the slurry falls to the bottom of the filter tank 1 through the filter plate 23. The stirring component 3 stirs the slurry at the bottom of the filter tank 1 through the rotating stirring shaft 32 to prevent the slurry stored at the bottom of the filter tank 1 from settling. In this process, the stirring shaft 32 will synchronously drive the drive ring 22 and the spiral rod 42, so that the drive ring 22 drives the filter plate 23 to the collecting shovel 41 The slurry discharged from the feed port 11 is evenly distributed on the filter plate 23, so that the filter plate 23 can fully filter the slurry and send the filtered impurities to the collecting shovel 41. The collecting shovel 41 scoops up the impurities on the filter plate 23 to ensure the smooth flow of the filter plate 23. As time goes by, more and more impurities will accumulate on the collecting shovel 41, and the newly scooped impurities will push the previously scooped impurities to move into the discharge trough 411, so that these impurities fall into the discharge trough 411, and the rotating spiral rod 42 discharges the impurities that fall into the discharge trough 411 out of the filter tank 1, so that the filter tank 1 can continue to filter the slurry until the production of this batch of slurry is completed. The slurry stored at the bottom of the filter tank 1 is discharged into the next production process by opening the discharge port 12 to produce the aluminum nitride ceramic substrate.

[0032] The difference from the above embodiment is that the stirring assembly 3 also includes a stirring paddle 33, which is fixedly connected to the lower end of the stirring shaft 32 and located at the bottom of the filter tank 1. A transmission bevel gear 321 is coaxially fixedly connected to the stirring shaft 32, and the transmission bevel gear 321 is located in the gathering disk 21.

[0033] After starting the equipment, the driving motor 31 drives the stirring shaft 32 to drive the stirring paddle 33 to rotate at the bottom of the filter tank 1 to fully stir the slurry stored at the bottom of the filter tank 1. At the same time, the rotating stirring shaft 32 will also drive the transmission bevel gear 321 to rotate synchronously.

[0034] The difference from the above-mentioned embodiment is that the gathering disk 21 includes an outer oblique ring 211 and a connecting piece 212, the outer side of the outer oblique ring 211 is fixedly connected to the inner wall of the filter tank 1, the inner side of the outer oblique ring 211 is an inwardly inclined slope, the connecting piece 212 is boss-shaped, coaxially rotatably connected to the stirring shaft 32, the connecting piece 212 and the outer oblique ring 211 are located on the same horizontal plane, a plurality of circularly distributed fixing rods 213 are arranged between the outer oblique ring 211 and the connecting piece 212, the two ends of the fixing rods 213 are respectively fixedly connected to the inner side of the outer oblique ring 211 and the outer side of the connecting piece 212, the space enclosed between the outer oblique ring 211 and the connecting piece 212 is funnel-shaped, and the feed port 11 is located between the outer oblique ring 211 and the connecting piece 212.

[0035] Among them, when the slurry falling from the feed inlet 11 falls on the filter plate 23, it will splash around. Through the setting of the outer shape of the outer oblique ring 211 and the connecting piece 212, the slurry splashing around will be blocked by the inner side of the outer oblique ring 211 and the outer side of the connecting piece 212, and flow back to the filter plate 23 along the inclined surfaces of the outer oblique ring 211 and the connecting piece 212, and gather together with the slurry on it to be filtered by the filter plate 23.

[0036] The difference from the above embodiment is that a plurality of comb teeth 2131 are fixedly connected to the lower side of the fixed rod 213, the comb teeth 2131 are evenly arranged under the fixed rod 213, and a gap is left between the bottom end of the comb teeth 2131 and the upper side of the filter plate 23 for impurities to pass through.

[0037] Among them, after the slurry is filtered by the filter plate 23, the impurities remaining on the filter plate 23 will accumulate together. When the rotating filter plate 23 passes under the fixed rod 213 with the impurities accumulated thereon, the fixed rod 213 combs out the accumulated impurities through the combing teeth 2131 at its lower end and smoothes them, so that the accumulated impurities are spread out on the filter plate 23, preventing the accumulated impurities from forming large lumps and unable to enter the discharge trough 411, thereby blocking the discharge trough 411.

[0038] The difference from the above-mentioned embodiment lies in that a plurality of support rods 221 are evenly distributed in a circular shape on the driving ring 22, the plurality of support rods 221 are fixedly connected to the driving ring 22, the driving ring 22 and the plurality of support rods 221 are rotatably connected to the inner side of the outer oblique ring 211 as a whole, the plurality of support rods 221 support the filter plate 23 on the driving ring 22, and the filter plate 23 is provided with a plurality of filter holes for filtering out impurities.

[0039] The difference from the above embodiment lies in that the two ends of the collecting shovel 41 are respectively fixedly connected to the inner side of the outer bevel ring 211 and the outer side of the connecting piece 212, and are located on one side of the feed port 11, between the two fixed rods 213, and the outward end of the discharge trough 411 extends to the outer side of the outer bevel ring 211, directly reaching the inner wall of the filter tank 1, and the end of the spiral rod 42 facing the stirring shaft 32 is coaxially fixedly connected with a transmission rod 421, and the transmission rod 421 penetrates the collecting shovel 41 and the connecting piece 212 and extends to the top of the transmission bevel gear 321, and a driven bevel gear 43 is rotatably installed on the transmission rod 421, and the driven bevel gear 43 is meshed with one side of the transmission bevel gear 321, and a block groove 412 and a mounting groove 413 are sequentially provided on the collecting shovel 41, and the block groove 412 and the mounting groove 413 are located between the shovel head of the collecting shovel 41 and the discharge trough 411.

[0040] When the transmission bevel gear 321 rotates, it drives the driven bevel gear 43 meshing therewith, so that the driven bevel gear 43 drives the screw rod 42 to rotate through the transmission rod 421, and the impurities in the discharge trough 411 are discharged from the filter tank 1.

[0041] The difference from the above embodiment is that the discharge assembly 4 also includes a supporting plate 5, one end of the supporting plate 5 is fixedly connected with an arc-shaped stopper 52, the arc-shaped stopper 52 is movably installed in the stopper groove 412, the bottom of the supporting plate 5 is fixedly connected with a rotating shaft 51, the rotating shaft 51 is rotatably installed in the installation groove 413, and both ends of the rotating shaft 51 are sleeved with torsion springs 53, the torsion springs 53 drive the supporting plate 5 to remain horizontal on the collecting shovel 41, and there is a certain distance between the other end of the supporting plate 5 and the discharge groove 411, so that the impurities shoveled by the collecting shovel 41 can enter the discharge groove 411.

[0042] When the collecting shovel 41 scoops up the impurities on the filter plate 23, the newly scooped impurities push the previously scooped impurities to move to the carrying plate 5, and the impurities accumulated on the carrying plate 5 will fall from the carrying plate 5 into the discharge groove 411 little by little. When there are too many impurities accumulated on the carrying plate 5, the carrying plate 5 is tilted toward the discharge groove 411 under the pressure of these impurities, and the impurities on it are poured into the discharge groove 411, and the torsion springs 53 at both ends of the carrying plate 5 are stored. After the inclined carrying plate 5 is poured into some impurities, the pressure of the impurities accumulated on the carrying plate 5 on the carrying plate 5 is less than the force of the torsion spring 53 to restore the deformation, and the torsion spring 53 restores the deformation to release the stored force, so that the carrying plate 5 returns to a horizontal state, and the amount of impurities entering the discharge groove 411 is regulated by the carrying plate 5, so as to prevent the impurities from excessively entering the discharge groove 411 and blocking the discharge groove 411 beyond the tolerable range of the discharge groove 411, thereby ensuring the normal operation of the discharge groove 411. When the carrying plate 5 is tilted, the carrying plate 5 drives the arc-shaped stopper 52 to rotate a corresponding angle in the stopper groove 412. During the rotation of the arc-shaped stopper 52, the arc-shaped stopper 52 is always closely attached to the inner wall of the stopper groove 412 through the arc surface, thereby preventing a gap from being generated between the end of the carrying plate 5 and the collecting shovel 41 when the carrying plate 5 is tilted, so as to prevent the impurities from entering therein and hindering the movement of the carrying plate 5 on the collecting shovel 41, thereby ensuring the normal operation of the carrying plate 5.

[0043] Embodiment 2

[0044] The difference from the above embodiment is that a discharge port connected to the discharge groove 411 is provided on one side of the filter tank 1, and a connecting seat 13 is provided on the filter tank 1. The connecting seat 13 is fixedly connected to the outer side of the filter tank 1 and is symmetrically distributed on both sides of the discharge port of the filter tank 1. A locking groove 131 is provided on the connecting seat 13, a collecting box 6 is installed on the connecting seat 13, and a discharge valve 7 is fixedly installed at the lower end of the discharge port 12.

[0045] Among them, when it is necessary to transport the slurry stored in the filter tank 1 to the next process, the discharge port 12 is opened by opening the discharge valve 7. In the process of discharging impurities, the impurities discharged from the discharge trough 411 will enter the collection box 6 through the discharge port of the filter tank 1. After the equipment completes production, the block 61 is disengaged from the locking groove 131, and the collection box 6 is removed from the connecting seat 13. Then, the sealing cover 62 is opened by the handle 621. After the impurities collected in the collection box 6 are cleaned up, the sealing cover 62 is replaced, and the collection box 6 is reinstalled on the connecting seat 13 for the next production.

[0046] The difference from the above-mentioned embodiment lies in that blocks 61 are fixedly connected to both sides of the collecting box 6, the collecting box 6 is engaged in the engaging groove 131 through the blocks 61, and is detachably mounted on the connecting seat 13, a notch is provided on the side of the collecting box 6 facing the filter tank 1, corresponding to the discharge port of the filter tank 1, a sealing cover 62 is installed on the upper end of the collecting box 6, and two handles 621 are symmetrically fixedly connected to the upper side of the sealing cover 62.

[0047] A slurry filtering method for producing aluminum nitride ceramics uses a slurry filtering device.

[0048] Working principle: When in use, first start the driving motor 31, the driving motor 31 drives the stirring shaft 32 to drive the stirring paddle 33 to rotate at the bottom of the filter tank 1, and the rotating stirring shaft 32 will also drive the transmission bevel gear 321 and the driving ring 22 to rotate synchronously. At this time, the discharge valve 7 closes the discharge port 12, and then the slurry is discharged into the filter tank 1 from the feed port 11. The slurry entering the filter tank 1 through the feed port 11 will fall onto the filter plate 23 in the gathering disk 21. When the slurry falls on the filter plate 23, it will splash around. Through the setting of the outer shape of the outer oblique ring 211 and the connecting piece 212, the slurry splashed around will be blocked by the inner side of the outer oblique ring 211 and the outer side of the connecting piece 212, and flow back to the filter plate 23 along the inclined surface of the outer oblique ring 211 and the connecting piece 212, and converge with the slurry on it and be filtered by the filter plate 23. The filter plate 23 separates the impurities in the slurry from the slurry, so that the impurities remain on the filter plate 23, while the slurry The slurry falls into the bottom of the filter tank 1 through the filter plate 23, and the stirring component 3 stirs the slurry at the bottom of the filter tank 1 through the rotating stirring paddle 33 to prevent the slurry stored at the bottom of the filter tank 1 from settling. In this process, the rotating driving ring 22 drives the filter plate 23 to rotate toward the collecting shovel 41, so that the slurry discharged from the feed inlet 11 can be evenly distributed on the filter plate 23, so that the filter plate 23 can fully filter the slurry and send the filtered impurities to the collecting shovel 41. After the slurry is filtered by the filter plate 23, the impurities remaining on the filter plate 23 will accumulate together. When the rotating filter plate 23 passes under the fixed rod 213 with the impurities accumulated thereon, the fixed rod 213 combs the accumulated impurities through the combing teeth 2131 at its lower end and smoothes them, so that the accumulated impurities are spread out on the filter plate 23, preventing the accumulated impurities from forming large blocks and being unable to enter the discharge trough 411, thereby blocking the discharge trough 411.

[0049] The collecting shovel 41 scoops up the impurities on the filter plate 23 to ensure the unobstructed flow of the filter plate 23. When the collecting shovel 41 scoops up the impurities on the filter plate 23, the newly scooped impurities push the previously scooped impurities to move to the carrier plate 5, and the impurities accumulated on the carrier plate 5 will fall from the carrier plate 5 into the discharge trough 411 little by little. When there are too many impurities accumulated on the carrier plate 5, the carrier plate 5 is tilted toward the discharge trough 411 under the pressure of these impurities, and the impurities on it are poured into the discharge trough 411, and the torsion springs 53 at both ends of the carrier plate 5 are charged. After some impurities are poured into the tilted carrier plate 5, The pressure exerted by the impurities accumulated on the carrier plate 5 on the carrier plate 5 is less than the force of the torsion spring 53 to restore the deformation. The torsion spring 53 thus restores the deformation and releases the stored force, so that the carrier plate 5 returns to a horizontal state. The amount of impurities entering the discharge groove 411 is regulated by the carrier plate 5, thereby preventing the impurities from excessively entering the discharge groove 411 and blocking the discharge groove 411 beyond the range that the discharge groove 411 can bear, thereby ensuring the normal operation of the discharge groove 411. When the carrier plate 5 is tilted, the carrier plate 5 drives the arc stopper 52 to rotate a corresponding angle in the stopper groove 412. During the rotation of the arc stopper 52, the arc stopper 52 The arc surface is always in close contact with the inner wall of the block groove 412, which prevents the gap between the end of the carrier plate 5 and the collecting shovel 41 from being generated when the carrier plate 5 is tilted, so that impurities enter therein and hinder the movement of the carrier plate 5 on the collecting shovel 41, thereby ensuring the normal operation of the carrier plate 5. When the transmission bevel gear 321 rotates, it drives the driven bevel gear 43 meshing with it. The driven bevel gear 43 drives the spiral rod 42 to rotate through the transmission rod 421 to discharge the impurities falling into the discharge groove 411 into the filter tank 1. The impurities discharged from the discharge groove 411 will enter the collecting box 6 through the discharge port of the filter tank 1, so that the filter tank 1 can always irrigate the slurry. The material is filtered until the production of this batch of slurry is completed. When it is necessary to transport the slurry stored in the filter tank 1 to the next process, the discharge port 12 is opened by opening the discharge valve 7, and the slurry is discharged into the next production process to produce the aluminum nitride ceramic substrate. After the equipment completes the production, the block 61 is disengaged from the engagement groove 131, and the collection box 6 is removed from the connecting seat 13. Then, the sealing cover 62 is opened by the handle 621. After the impurities collected in the collection box 6 are cleaned up, the sealing cover 62 is re-covered, and the collection box 6 is reinstalled on the connecting seat 13 for the next production.

[0050] 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 slurry filtering device, comprising a filter tank and a feed inlet on one side of the upper end of the filter tank and a discharge outlet in the middle of the lower end, characterized in that: The filter tank is provided with a filter assembly, a stirring assembly and a discharge assembly, the filter assembly includes a gathering disk and a driving ring, the gathering disk is fixedly installed in the filter tank, the driving ring is connected to the bottom of the gathering disk, a filter plate is fixedly connected to the driving ring, and the driving ring drives the filter plate to rotate under the gathering disk when filtering the slurry, the stirring assembly includes a driving motor and a stirring shaft, the driving motor is fixedly installed at the top of the filter tank, the upper end of the stirring shaft is rotatably connected to the driving motor, the lower end of the stirring shaft extends into the filter tank, passes through the gathering disk and is coaxially fixedly connected to the driving ring, and passes through the When filtering slurry, the driving motor drives the stirring shaft to rotate, stirs the filtered slurry in the filter tank, and drives the driving ring. The discharge assembly includes a collecting shovel and a spiral rod. The collecting shovel is fixedly connected to the gathering plate, and its bottom abuts against the upper side of the filter plate. A discharge groove is provided on one side of the collecting shovel. When the filter plate rotates, the collecting shovel shovels the impurities on the filter plate into the discharge groove. The spiral rod is rotatably installed in the discharge groove, and the spiral rod is matched with the stirring shaft. When the stirring shaft rotates, the spiral rod is driven to rotate to discharge the impurities in the discharge groove. The stirring assembly further comprises a stirring paddle, which is fixedly connected to the lowermost end of the stirring shaft and is located at the bottom of the filter tank. A transmission bevel gear is coaxially fixedly connected to the stirring shaft, and the transmission bevel gear is located in the gathering disk. The gathering disk comprises an outer oblique ring and a connecting piece, the outer side of the outer oblique ring is fixedly connected to the inner wall of the filter tank, the inner side of the outer oblique ring is an inwardly inclined inclined surface, the connecting piece is in the shape of a boss, and is coaxially rotatably connected to the stirring shaft, the connecting piece and the outer oblique ring are located on the same horizontal plane, a plurality of fixing rods distributed in a circumferential shape are arranged between the outer oblique ring and the connecting piece, the two ends of the fixing rods are respectively fixedly connected to the inner side of the outer oblique ring and the outer side of the connecting piece, the space enclosed between the outer oblique ring and the connecting piece is in the shape of a funnel, and the feed port is located between the outer oblique ring and the connecting piece; A plurality of comb teeth are fixedly connected to the lower side of the fixed rod, and the comb teeth are evenly arranged under the fixed rod, and a gap for impurities to pass through is left between the bottom end of the comb teeth and the upper side of the filter plate; A plurality of support rods are evenly distributed on the driving ring in a circumferential shape, and the plurality of support rods are fixedly connected to the driving ring. The driving ring and the plurality of support rods are integrally connected to the inner side of the outer oblique ring for rotation, and the plurality of support rods support the filter plate on the driving ring, and the filter plate is provided with a plurality of filter holes capable of filtering out impurities; The two ends of the collecting shovel are respectively fixedly connected to the inner side of the outer bevel ring and the outer side of the connecting piece, and are located on one side of the feed port, between the two fixed rods, and the outward end of the discharge trough extends to the outer side of the outer bevel ring and directly reaches the inner wall of the filter tank. The end of the spiral rod facing the stirring shaft is coaxially fixedly connected with a transmission rod, and the transmission rod passes through the collecting shovel and the connecting piece and extends to the top of the transmission bevel gear. A driven bevel gear is rotatably installed on the transmission rod, and the driven bevel gear is meshed with one side of the transmission bevel gear. A block groove and a mounting groove are sequentially opened on the collecting shovel, and the block groove and the mounting groove are located between the shovel head of the collecting shovel and the discharge trough; The discharge assembly also includes a supporting plate, one end of which is fixedly connected to an arc-shaped stopper, and the arc-shaped stopper is movably installed in the stopper groove. The bottom of the supporting plate is fixedly connected to a rotating shaft, and the rotating shaft is rotatably installed in the installation groove. Torsion springs are sleeved on both ends of the rotating shaft, and the torsion springs drive the supporting plate to remain horizontal on the collecting shovel. There is a certain distance between the other end of the supporting plate and the discharge trough, so that impurities scooped up by the collecting shovel can enter the discharge trough.

2. A slurry filtering device according to claim 1, characterized in that: A discharge port connected to the discharge trough is provided on one side of the filter tank, a connecting seat is provided on the filter tank, the connecting seat is fixedly connected to the outside of the filter tank and symmetrically distributed on both sides of the discharge port of the filter tank, a locking groove is provided on the connecting seat, a collecting box is installed on the connecting seat, and a discharge valve is fixedly installed at the lower end of the discharge port.

3. A slurry filtering device according to claim 2, characterized in that: Blocks are fixedly connected on both sides of the collection box, and the collection box is engaged in the engagement groove through the block and is detachably installed on the connecting seat. A notch is provided on the side of the collection box facing the filter tank, corresponding to the discharge port of the filter tank. A sealing cover is installed on the upper end of the collection box, and two handles are symmetrically fixedly connected to the upper side of the sealing cover.

4. A slurry filtration method for aluminum nitride ceramic production, characterized in that: A slurry filtering device as described in any one of claims 1 to 3 is used.

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