A diatomite filter

Abstract

The utility model discloses a kind of diatomite filters, belong to copper foil production technical field, including filter barrel, the upper portion of the outer surface of filter barrel is provided with water inlet pipe, the inside of filter barrel is provided with filter device, the bottom end of filter barrel is provided with water outlet pipe, diatomite is filled and arranged in filter device, filter device includes the baffle fixedly arranged in filter barrel, several filter cartridges are inserted in the baffle.The utility model uses, when installing, filter cartridge is inserted into support plate and baffle in sequence, and make the second plug-in part on lock shaft be inserted into the first plug-in part on the inner bottom wall of filter barrel, driving shaft moves downward relative to rotating block, make the driving block on driving shaft push rotating block and rotate the angle set, make rotating block drive second plug-in part and rotate the angle set in the first plug-in part, realize the locking and fixing of second plug-in part and first plug-in part, and then make filter cartridge fixed, realize the installation of filter cartridge, realize the purpose of convenient disassembly and installation filter cartridge.

Description

Technical Field

[0001] This utility model belongs to the field of copper foil production technology, and in particular relates to a diatomaceous earth filter. Background Technology

[0002] Copper foil production includes electrolysis, cleaning, leveling, and annealing processes. Electrolysis: The electrolyte used in electrolysis contains sulfuric acid, copper sulfate, etc. After electrolysis, the electrolytic cell needs to be cleaned, generating wastewater. Cleaning: Electrolytic copper foil requires multiple cleanings during production to remove surface impurities. This cleaning process generates wastewater containing metal ions such as copper sulfate. Leveling: To improve the flatness of the copper foil, chemical surface treatments are sometimes used. These chemicals also contribute to the wastewater after use. Annealing: During annealing, residual chemicals may remain on the copper foil surface, generating wastewater during cleaning.

[0003] The production of copper foil generates a large amount of wastewater. Therefore, the treatment of wastewater must be carried out efficiently and with high quality, otherwise it will affect the overall efficiency of copper foil production. Existing copper foil wastewater treatment uses a series of processes, including displacement, ion exchange, electrolysis, osmosis, membrane separation and adsorption. Among them, the adsorption method generally uses a filter with built-in diatomaceous earth.

[0004] During use, diatomaceous earth filters require periodic removal of the filter cartridge 5 to replace the internal diatomaceous earth. Currently, the filter cartridge 5 is typically fixed to the partition plate 4 via a threaded connection. However, it has been found that the filter cartridge 5 is not easy to install onto the partition plate 4. Specifically, during operation, the operator holds the filter cartridge 5 and inserts it into the filter barrel 1 from the top, then aligns the bottom of the filter cartridge 5 with the threaded hole of the partition plate 4 before screwing it on. Because the filter cartridge 5 is relatively long, this alignment with the threaded hole of the partition plate 4 is difficult. Furthermore, during screwing, it is also easy to damage the filter cartridge 5. The filter cartridge 5 is tilted after being aligned, making it difficult to connect with the threaded hole no matter how it is screwed. Inside the existing filter barrel 1, a support plate 6 is fixedly installed above the partition plate 4. Each filter cartridge 5 is fitted with the support plate 6. When installing the filter cartridge 5, the filter cartridge 5 needs to be inserted into the support plate 6 first and then continue downward to align with the threaded hole of the partition plate 4. The filter cartridge 5 is then screwed to connect with the partition plate 4. Due to the presence of the support plate 6, it is even more difficult to install the filter cartridge 5. After the filter cartridge 5 passes through the support plate 6, the lower end of the filter cartridge 5 will wobble, making the threaded connection difficult. Utility Model Content

[0005] The purpose of this utility model is to provide a diatomaceous earth filter. The filter cartridge can be installed by pressing after passing through the support plate and partition plate, and can be disassembled by pressing again. It has the advantages of convenient installation and disassembly, and effectively solves the problem of filter cartridges being inconvenient to disassemble and install in the prior art.

[0006] This utility model adopts the following technical solution: a diatomaceous earth filter, including a filter barrel, an inlet pipe provided on the upper part of the outer surface of the filter barrel, a filter device provided inside the filter barrel, an outlet pipe provided at the bottom end of the filter barrel, diatomaceous earth filling the filter device, the filter device including a partition fixedly installed inside the filter barrel, a plurality of filter cylinders inserted in the partition, and diatomaceous earth filling the filter cylinders; a first insertion part corresponding to the filter cylinder is fixedly provided on the inner bottom wall of the filter barrel, a locking shaft is rotatably connected to the bottom end of the filter cylinder, a second insertion part adapted to the first insertion part is fixedly provided at the bottom end of the locking shaft, the second insertion part is inserted into the first insertion part and screwed at a set angle, the first insertion part and the second insertion part are locked and fixed.

[0007] Furthermore, a rotating block is slidably arranged on the locking shaft in the up-down direction, a drive shaft is fixedly arranged between the bottom end of the filter cartridge and the locking shaft, several drive blocks are fixedly arranged on the outer surface of the drive shaft, and a compression spring is fixedly arranged on the first insertion part.

[0008] Furthermore, the first insertion part is a fixed cylinder with a bottom hole at the bottom end. The bottom end of the fixed cylinder is fixedly installed to the inner bottom wall of the filter barrel. The upper end face of the fixed cylinder has an insertion hole that matches the locking shaft. The insertion hole communicates with the bottom hole. Several keyways are evenly provided on the inner side wall of the insertion hole. A key strip that matches the keyway is fixedly installed at the bottom of the outer surface of the locking shaft. The compression spring is fixedly installed on the upper end face of the fixed cylinder.

[0009] Furthermore, the circumferential surface of the rotating block is uniformly fixed with several vertical strips along the axis, and the upper end surface of each vertical strip is provided with a first inclined surface, and the lower end surface of the driving block on each driving shaft is provided with a second inclined surface that matches the first inclined surface.

[0010] Furthermore, several limiting blocks are uniformly fixed around the drive shaft at the position corresponding to the filter cartridge on the lower end face of the partition plate. A vertical channel is formed between each pair of adjacent limiting blocks, and a slot adapted to the vertical bar is opened on the lower end face of the limiting block.

[0011] Furthermore, the upper end face of the drive shaft is provided with several through holes in the vertical direction, the bottom end of the filter cylinder is fixedly set with the upper end face of the drive shaft, and the interior of the filter cylinder is connected to the space below the partition through the through holes of the drive shaft.

[0012] Furthermore, the top of the filter bucket is open, and a pressure cap is provided at the top of the filter bucket to seal the top of the filter bucket.

[0013] Furthermore, a fixing block is fixedly installed on the outer surface of the filter barrel, and a right-angle rod is rotatably connected inside the fixing block. The horizontal part of the right-angle rod extends into the top of the pressure cover and is fixedly installed with an installation block. A threaded rod is slidably installed inside the installation block in the up-down direction, and the bottom end of the threaded rod is fixedly installed with the pressure cover.

[0014] Furthermore, a drive nut is rotatably connected to the upper end face of the mounting block, and the drive nut is threadedly connected to the threaded rod.

[0015] Furthermore, the pressure cap is pressed and fixed to the top of the filter barrel by several clamping bolts.

[0016] I. This utility model, by setting a first insertion part, a second insertion part, a filter cartridge, and a locking shaft, requires the filter cartridge to be disassembled and the diatomaceous earth replaced periodically during use. During installation, the filter cartridge is inserted sequentially into the support plate and the partition plate, and the second insertion part on the locking shaft is inserted into the first insertion part on the bottom wall of the filter cartridge. At this time, the rotating block is blocked by a compression spring. While the compression spring is compressed, the drive shaft moves downward relative to the rotating block, causing the drive block on the drive shaft to push the rotating block to rotate by a set angle. This causes the rotating block to drive the locking shaft to rotate by a set angle, which in turn causes the locking shaft to drive the second insertion part to rotate by a set angle within the first insertion part, thus locking and fixing the second insertion part and the first insertion part, thereby fixing the filter cartridge and achieving filter cartridge installation. During disassembly, pressing the filter cartridge causes the drive shaft to continue pushing the rotating block to rotate by a set angle through the drive block, which in turn causes the second insertion part to continue rotating by a set angle within the first insertion part, releasing the lock between the second insertion part and the first insertion part. Then, the filter cartridge can be pulled out, achieving the purpose of facilitating filter cartridge disassembly and installation.

[0017] II. By setting a fixed cylinder, a locking shaft, a key bar, and a compression spring, when the filter cartridge moves downward, it drives the locking shaft to insert into the insertion hole, and causes the key bar to enter the bottom hole through the corresponding keyway. Then, the locking shaft rotates at a set angle relative to the drive shaft, causing the key bar of the locking shaft to misalign with the keyway, and the locking shaft will not be able to move upward, thereby locking the second insertion part and the first insertion part and fixing the filter cartridge. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the internal three-dimensional structure of the filter barrel in this utility model;

[0020] Figure 3 This is a three-dimensional structural diagram of the partition and support plate in this utility model;

[0021] Figure 4 This is a three-dimensional structural diagram of the fixed cylinder in this utility model;

[0022] Figure 5 This is a schematic diagram of the internal three-dimensional structure of the fixed cylinder in this utility model;

[0023] Figure 6 This is a three-dimensional structural diagram of the drive shaft in this utility model;

[0024] Figure 7 This is a three-dimensional structural diagram of the limiting block in this utility model.

[0025] In the diagram, 1. Filter barrel; 2. Inlet pipe; 3. Outlet pipe; 4. Baffle plate; 5. Filter cartridge; 6. Support plate; 7. First insertion part; 8. Locking shaft; 9. Rotating block; 10. Drive shaft; 11. Drive block; 12. Compression spring; 13. Fixed cylinder; 14. Bottom hole; 15. Keyway; 16. Key bar; 17. Vertical bar; 18. First inclined surface; 19. Second inclined surface; 20. Limiting block; 21. Slot; 22. Through hole; 23. Pressure cap; 24. Fixed block; 25. Right angle rod; 26. Mounting block; 27. Threaded rod; 28. Drive nut; 29. ​​Tightening bolt. Detailed Implementation

[0026] Please see Figure 1-7 The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0027] The diatomaceous earth filter of this utility model includes a filter barrel 1, an inlet pipe 2 provided on the upper part of the outer surface of the filter barrel 1, a filtration device provided inside the filter barrel 1, and an outlet pipe 3 provided at the bottom of the filter barrel 1. In use, copper sulfate wastewater enters the filter barrel 1 through the inlet pipe 2, is filtered by the filtration device, and is discharged through the outlet pipe 3, thus achieving the purpose of filtering copper sulfate wastewater generated during copper foil production. The filtration device is filled with diatomaceous earth, utilizing the fineness and porosity of the diatomaceous earth particles to remove suspended particles, colloids, and other impurities from the copper sulfate wastewater. The filtration device includes components fixedly mounted on the filter barrel. The filter canister 1 has a partition 4 inside, and several filter cartridges 5 are inserted inside the partition 4. Diatomaceous earth is filled inside the filter cartridges 5. When in use, copper sulfate wastewater enters the filter canister 1 from the inlet pipe 2. At this time, the copper sulfate wastewater is located in the internal space of the filter canister 1 above the partition 4. Under the action of water pressure, the copper sulfate wastewater enters each filter cartridge 5 and flows downward after being filtered by the diatomaceous earth. It then flows from the bottom of the filter cartridge 5 into the space below the partition 4. The copper sulfate wastewater flowing into the space below is filtered by the diatomaceous earth, removing internal suspended particles and other impurities. Then it is discharged from the outlet pipe 3, thus achieving the filtration of copper sulfate wastewater.

[0028] During use, the filter cartridge 5 needs to be periodically removed to replace the internal diatomaceous earth. Currently, the filter cartridge 5 is typically fixed to the partition plate 4 via a threaded connection. However, it has been found that the filter cartridge 5 is not easy to install on the partition plate 4. Specifically, during operation, the operator holds the filter cartridge 5 and inserts it into the filter barrel 1 from the top, then aligns the bottom of the filter cartridge 5 with the threaded hole of the partition plate 4 and screws it on. Because the filter cartridge 5 is relatively long, it is difficult to align the threaded hole with the partition plate 4. Furthermore, during screwing, the aligned filter cartridge 5 is prone to slipping. The filter cartridge 5 is skewed and cannot be threaded into the threaded hole no matter how it is screwed. Inside the existing filter barrel 1, a support plate 6 is fixedly installed above the partition plate 4. Each filter cartridge 5 is fitted with the support plate 6. When installing the filter cartridge 5, the filter cartridge 5 needs to be inserted into the support plate 6 first and then continue downward to align with the threaded hole of the partition plate 4. The filter cartridge 5 is then screwed into the partition plate 4 for threaded connection. Due to the presence of the support plate 6, it is even more difficult to install the filter cartridge 5. After the filter cartridge 5 passes through the support plate 6, the lower end of the filter cartridge 5 will wobble, making the threaded connection difficult.

[0029] In this embodiment, a first insertion part 7 corresponding to the filter cylinder 5 is fixedly provided on the inner bottom wall of the filter barrel 1. A locking shaft 8 is rotatably connected to the bottom end of the filter cylinder 5. A second insertion part adapted to the first insertion part 7 is fixedly provided at the bottom end of the locking shaft 8. The second insertion part is inserted into the first insertion part 7 and screwed at a set angle. The first insertion part 7 and the second insertion part are locked and fixed, thereby realizing the installation and fixation of the filter cylinder 5. A rotating block 9 is slidably provided on the locking shaft 8 in the up-down direction. A drive shaft 10 is fixedly provided between the bottom end of the filter cylinder 5 and the locking shaft 8. Several drive blocks 11 are fixedly provided on the outer surface of the drive shaft 10. A compression spring 12 is fixedly provided on the first insertion part 7. In use, the filter cylinder 5 is inserted into the support plate 6 and the partition plate 4 in sequence, and The second insertion part on the locking shaft 8 is inserted into the first insertion part 7 on the bottom wall of the filter barrel 1. At this time, the rotating block 9 is blocked by the compression spring 12. While the compression spring 12 is compressed, the drive shaft 10 moves downward relative to the rotating block 9, causing the drive block 11 on the drive shaft 10 to push the rotating block 9 to rotate by a set angle. This causes the rotating block 9 to drive the locking shaft 8 to rotate by a set angle, which in turn causes the locking shaft 8 to drive the second insertion part to rotate by a set angle within the first insertion part 7, thereby locking and fixing the second insertion part and the first insertion part 7, and thus fixing the filter barrel 5 and realizing the installation of the filter barrel 5. The support plate 6 and the partition plate 4 both have light holes, so it is relatively easy to insert the filter barrel 5 into the support plate 6 and the partition plate 4.

[0030] The above solution is easier to install than ordinary threaded connections. During installation, simply press the top of the filter cartridge 5 after it passes through the support plate 6 and the partition plate 4, then release. The filter cartridge 5 will rise slightly. At this point, try to pull the filter cartridge 5 upwards. If the filter cartridge 5 cannot be pulled out, it means that the filter cartridge 5 has been fixedly installed. The operation is simple and the installation is convenient. When disassembling, first press the filter cartridge 5, so that the filter cartridge 5 drives the drive shaft 10 and the locking shaft 8 downwards. When the drive shaft 10 moves downwards, it pushes the rotating block 9 to rotate by a set angle through the drive block 11, so that the rotating block 9 drives the locking shaft 8 to rotate. The locking shaft 8 drives the second insertion part to rotate by a set angle within the first insertion part 7, so that the second insertion part and the first insertion part 7 are disengaged. Then, pull the filter cartridge 5 upwards to remove it. Disassembly is convenient.

[0031] In this embodiment, the first insertion part 7 is a fixed cylinder 13 with a bottom hole 14 at the bottom end. The bottom end of the fixed cylinder 13 is fixedly set to the inner bottom wall of the filter barrel 1. The upper end face of the fixed cylinder 13 is provided with an insertion hole that matches the locking shaft 8. The insertion hole communicates with the bottom hole 14. Several keyways 15 are evenly provided on the inner side wall of the insertion hole. A key bar 16 that matches the keyway 15 is fixedly set at the bottom of the outer surface of the locking shaft 8. The compression spring 12 is fixedly set on the upper end face of the fixed cylinder 13. In use, when the filter barrel 5 moves downward, it drives the locking shaft 8 to insert into the insertion hole, and the key bar 16 enters the bottom hole 14 through the corresponding keyway 15. Then, the locking shaft 8 rotates at a set angle relative to the drive shaft 10, so that the key bar 16 of the locking shaft 8 is misaligned with the keyway 15. The locking shaft 8 will not be able to move upward, thus realizing the locking of the second insertion part and the first insertion part 7.

[0032] In this embodiment, a plurality of vertical strips 17 are uniformly fixedly arranged on the circumferential surface of the rotating block 9 along the axis. The upper end face of each vertical strip 17 is provided with a first inclined surface 18, and the lower end face of the driving block 11 on each driving shaft 10 is provided with a second inclined surface 19 that matches the first inclined surface 18. In use, the filter cartridge 5 moves downward. First, the locking shaft 8 is inserted into the insertion hole of the fixed cylinder 13. At this time, the rotating block 9 is resisted by the compression spring 12 and moves downward slowly, so that the driving shaft 10 and the locking shaft 8 are relatively close to the rotating block 9. Moving downwards, when the key bar 16 of the locking shaft 8 enters the bottom hole 14 through the corresponding keyway 15, the drive block 11 of the drive shaft 10 drives the vertical bar 17 to rotate through the cooperation of the second inclined surface 19 and the first inclined surface 18 of the vertical bar 17. The vertical bar 17 drives the rotating block 9 to rotate, so that the rotating block 9 drives the locking shaft 8 to rotate by a set angle, so that the locking shaft 8 drives the key bar 16 to rotate by a set angle in the bottom hole 14, so that the key bar 16 and the keyway 15 are misaligned, thereby locking the locking shaft 8 and the fixed cylinder 13.

[0033] In this embodiment, several limiting blocks 20 are uniformly fixed around the drive shaft 10 at the position corresponding to the lower end face of the partition 4 and the filter cartridge 5. A vertical channel is formed between each pair of adjacent limiting blocks 20. When the filter cartridge 5 is installed, the locking shaft 8 and the drive shaft 10 pass downward through the limiting blocks 20. The vertical bar 17 of the rotating block 9 enters the corresponding vertical channel. When the rotating block 9 contacts the compression spring 12, the drive block 11 of the drive shaft 10 pushes the vertical bar 17 to move downward synchronously. When the vertical bar 17 moves downward to the bottom of the limiting block 20, the vertical bar 17 disengages from the vertical channel. The drive shaft 10 continues to press down and drives the vertical bar 17 to rotate through the drive block 11. The vertical bar 17 drives the rotating block 9 to rotate, the rotating block 9 drives the locking shaft 8 to rotate, and the locking shaft 8 drives several key bars 16 to rotate, causing the key bars 16 to be misaligned with the keyway 15. At this time, the vertical bar 17 is located in the limiting block 20. At the lower end face, the lower end face of the limiting block 20 is provided with a slot 21 that matches the vertical bar 17. At this time, the vertical bar 17 is pushed upward by the compression spring 12 and enters the slot 21 to contact the drive block 11 inside the limiting block 20, thus completing the installation of the filter cartridge 5. When the filter cartridge 5 needs to be disassembled, press the filter cartridge 5 downward. The filter cartridge 5 drives the drive shaft 10 to move downward. The drive block 11 of the drive shaft 10 (the drive block 11 located inside the limiting block 20) ​​drives the vertical bar 17 to move downward. When the vertical bar 17 is disengaged from the slot 21, the drive block 11 drives the vertical bar 17 to continue to rotate at a set angle and enter the vertical channel. The vertical bar 17 drives the rotating block 9 to rotate. The rotating block 9 drives the locking shaft 8 to rotate. The locking shaft 8 drives the key bar 16 to rotate at a set angle, so that the key bar 16 is aligned with the corresponding key groove 15. At this time, the filter cartridge 5 can be pulled upward to remove it, thus realizing the disassembly of the filter cartridge 5.

[0034] In this embodiment, the upper end face of the drive shaft 10 is provided with several through holes 22 in the vertical direction. The bottom end of the filter cylinder 5 is fixedly set with the upper end face of the drive shaft 10. At the same time, the interior of the filter cylinder 5 is connected to the space below the partition plate 4 through the through holes 22 of the drive shaft 10, so that the copper sulfate wastewater in the filter cylinder 5 flows downward through the through holes 22 of the drive shaft 10 into the space below the partition plate 4, and then is discharged from the outlet pipe 3, thus completing the purpose of filtering the copper sulfate wastewater.

[0035] In this embodiment, the top of the filter bucket 1 is open, and a pressure cap 23 is provided at the top of the filter bucket 1 to seal the top of the filter bucket 1; when it is necessary to open the pressure cap 23, the pressure cap 23 can be lifted up.

[0036] To facilitate opening the pressure cap 23, in this embodiment, a fixing block 24 is fixedly installed on the outer surface of the filter barrel 1. A right-angle rod 25 is rotatably connected inside the fixing block 24. The horizontal part of the right-angle rod 25 extends into the top of the pressure cap 23 and is fixedly installed with an mounting block 26. A threaded rod 27 is slidably installed in the mounting block 26 along the vertical direction. The bottom end of the threaded rod 27 is fixedly installed with the pressure cap 23. A drive nut 28 is rotatably connected to the upper end face of the mounting block 26. The drive nut 28 is threadedly connected to the threaded rod 27. The pressure cap 23 is tightened by several clamping bolts 29. The pressure cap 23 is fixed at the top of the filter barrel 1. When it is necessary to open the pressure cap 23, first remove the clamping bolt 29, then rotate the drive nut 28. The drive nut 28 drives the threaded rod 27 to move upward (the threaded rod 27 and the mounting block 26 can only slide up and down and cannot rotate). This causes the threaded rod 27 to drive the pressure cap 23 to move upward, so that the pressure cap 23 is disengaged from the top of the filter barrel 1. Then, rotate the right-angle rod 25 to drive the pressure cap 23 to rotate. This allows the pressure cap 23 to rotate 90 degrees or 180 degrees, thus opening the top of the filter barrel 1 and facilitating the maintenance of the filter cartridge 5.

[0037] The clamping bolt 29 for fixing the pressure cap 23 is existing technology and will not be described in detail here.

[0038] The working principle of this utility model is as follows: When the filter cartridge 5 needs to be installed, first remove the clamping bolt 29, then rotate the drive nut 28. The drive nut 28 drives the threaded rod 27 to move upward, causing the threaded rod 27 to drive the pressure cover 23 to move upward, so that the pressure cover 23 disengages from the top of the filter barrel 1. The filter cartridge 5 with the new diatomaceous earth is then passed through the support plate and partition plate 4, allowing the drive shaft 10 and locking shaft 8 to pass downward between several limiting blocks 20. The vertical bar 17 of the rotating block 9 enters the corresponding vertical channel, and at the same time, the locking shaft 8 is inserted into the insertion hole of the fixed cylinder 13. When the rotating block 9 contacts the compression spring 12, the drive block 11 of the drive shaft 10 pushes the vertical bar 17 to move downward synchronously. When the vertical bar 17 moves downward to the bottom of the limiting block 20, the vertical bar 17 disengages from the vertical channel. The drive shaft 10 continues to press down, driving the vertical bar 17 to rotate through the drive block 11. The vertical bar 17 drives the rotating block 9 to rotate, and the rotating block 9 drives the locking shaft 8. Rotating the locking shaft 8 causes several key bars 16 to rotate, causing the key bars 16 to be misaligned with the key groove 15. At this time, the vertical bar 17 is located at the lower end face of the limiting block 20. Under the push of the compression spring 12, the vertical bar 17 moves upward into the slot 21 and contacts the drive block 11 behind the limiting block 20. After the filter cartridge 5 is installed, when it needs to be disassembled, press the filter cartridge 5 downward. The filter cartridge 5 drives the drive shaft 10 to move downward. The drive block 11 of the drive shaft 10 (located behind the limiting block 20) ​​drives the vertical bar 17 downward. When the vertical bar 17 is disengaged from the slot 21, the drive block 11 drives the vertical bar 17 to continue to rotate at a set angle and enter the vertical channel. The vertical bar 17 drives the rotating block 9 to rotate. The rotating block 9 drives the locking shaft 8 to rotate. The locking shaft 8 drives the key bar 16 to rotate at a set angle, so that the key bar 16 is aligned with the corresponding key groove 15. At this time, the filter cartridge 5 can be pulled upward to remove it, thus realizing the disassembly of the filter cartridge 5.

Claims

1. A diatomaceous earth filter, characterized in that: The filter includes a filter bucket (1), an inlet pipe (2) on the upper part of the outer surface of the filter bucket (1), a filter device inside the filter bucket (1), an outlet pipe (3) at the bottom of the filter bucket (1), diatomaceous earth filling the filter device, the filter device including a partition (4) fixedly installed inside the filter bucket (1), a plurality of filter cylinders (5) inserted in the partition (4), and diatomaceous earth filling the filter cylinders (5); a first insertion part (7) corresponding to the filter cylinder (5) is fixedly installed on the inner bottom wall of the filter bucket (1), a locking shaft (8) is rotatably connected to the bottom end of the filter cylinder (5), a second insertion part adapted to the first insertion part (7) is fixedly installed at the bottom end of the locking shaft (8), the second insertion part is inserted into the first insertion part (7) and screwed at a set angle, and the first insertion part (7) and the second insertion part are locked and fixed.

2. The diatomaceous earth filter according to claim 1, characterized in that: A rotating block (9) is slidably arranged on the locking shaft (8) along the up and down direction. A drive shaft (10) is fixedly arranged between the bottom end of the filter cylinder (5) and the locking shaft (8). Several drive blocks (11) are fixedly arranged on the outer surface of the drive shaft (10). A compression spring (12) is fixedly arranged on the first insertion part (7).

3. The diatomaceous earth filter according to claim 2, characterized in that: The first insertion part (7) is a fixed cylinder (13) with a bottom hole (14) at the bottom end. The bottom end of the fixed cylinder (13) is fixedly set to the inner bottom wall of the filter barrel (1). The upper end face of the fixed cylinder (13) is provided with an insertion hole that matches the locking shaft (8). The insertion hole communicates with the bottom hole (14). Several keyways (15) are evenly opened on the inner side wall of the insertion hole. A key strip (16) that matches the keyway (15) is fixedly set at the bottom of the outer surface of the locking shaft (8). The compression spring (12) is fixedly set on the upper end face of the fixed cylinder (13).

4. The diatomaceous earth filter according to claim 3, characterized in that: The circumferential surface of the rotating block (9) is uniformly fixed with several vertical strips (17) along the axis. The upper end surface of each vertical strip (17) is provided with a first inclined surface (18), and the lower end surface of the driving block (11) on each driving shaft (10) is provided with a second inclined surface (19) that matches the first inclined surface (18).

5. The diatomaceous earth filter according to claim 1, characterized in that: The lower end face of the partition (4) is uniformly fixed with several limiting blocks (20) around the drive shaft (10) at the position corresponding to the filter cylinder (5). A vertical channel is formed between each two adjacent limiting blocks (20). The lower end face of the limiting block (20) is provided with a slot (21) that matches the vertical bar (17).

6. The diatomaceous earth filter according to claim 2, characterized in that: The upper end face of the drive shaft (10) is provided with several through holes (22) in the vertical direction. The bottom end of the filter cylinder (5) is fixedly set with the upper end face of the drive shaft (10). The interior of the filter cylinder (5) is connected to the space below the partition plate (4) through the through holes (22) of the drive shaft (10).

7. The diatomaceous earth filter according to claim 1, characterized in that: The filter bucket (1) is open at the top and has a pressure cap (23) at the top, which seals the top of the filter bucket (1).

8. The diatomaceous earth filter according to claim 7, characterized in that: A fixing block (24) is fixedly installed on the outer surface of the filter barrel (1). A right-angle rod (25) is rotatably connected inside the fixing block (24). The horizontal part of the right-angle rod (25) extends into the top of the pressure cover (23) and is fixedly installed with an installation block (26). A threaded rod (27) is slidably installed inside the installation block (26) along the up and down direction. The bottom end of the threaded rod (27) is fixedly installed with the pressure cover (23).

9. The diatomaceous earth filter according to claim 8, characterized in that: The upper end face of the mounting block (26) is rotatably connected to a drive nut (28), and the drive nut (28) is threadedly connected to the threaded rod (27).

10. The diatomaceous earth filter according to claim 8, characterized in that: The pressure cap (23) is pressed and fixed to the top of the filter barrel (1) by several clamping bolts (29).

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