Metronidazole filtering device

Abstract

The utility model discloses a metronidazole filtering device, which is characterized in that a buffer unit, a flushing unit and a filtering unit are arranged in a filtering tank, and the impact force of mixed liquid on a filter screen due to the flow velocity and gravity action is weakened by utilizing a buffer slope, so that the loss of the filter screen is reduced; the holes are formed in the buffer slope and the platform, so that part of the mixed liquid can flow onto the filter screen through the holes, and the dispersion uniformity of the mixed liquid on the filter screen is improved; the flushing unit is arranged in the open groove below the supporting beam, so that the equipment structure is simplified while high-pressure flushing of the filter screen is realized; the filter screen is fixed to the supporting rod, the motor drives the supporting rod to rotate, the filter screen can rotate to any angle for high-pressure washing, and the service life of the filter screen is prolonged; the partition plate is arranged in the middle of the filter screen, and the upper surface of the partition plate is a convex surface, so that the mixed liquid can be shunted to the filter screens on two sides of the partition plate, unfiltered mixed liquid is prevented from remaining in a support rod area, and waste and raw material cost are reduced.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, and in particular to a filter device for metronidazole production. Background Technology

[0002] Metronidazole is primarily used as an antibiotic to treat or prevent localized infections caused by anaerobic bacteria. It is a white to slightly yellow crystalline powder with a mild odor. Filtration devices are required in the production of metronidazole and in the recovery of metronidazole from industrial waste.

[0003] In existing filtration devices, the mixture to be filtered is typically fed into the filter tank through a feed inlet at the top. After entering the tank, the mixture falls directly onto a filter screen at the bottom. In industrial production, the volume of the mixture to be filtered is very large. To increase filtration efficiency, the flow rate and weight of the mixture fed into the tank are usually relatively high. The large volume of mixture falling directly onto the filter screen due to gravity creates a significant impact, easily damaging the filter screen and shortening its lifespan.

[0004] To address the aforementioned problems, patent CN218306445U discloses a filter press for metronidazole production, comprising a filter press body, a filter press cover, a fixed pressure block, a filter screen, and a movable block. The filter press cover is installed at the top of the filter press body, and a feed inlet is installed at the bottom. A first mounting groove is formed inside the left side of the filter press body. A connecting rod is installed above the fixed pressure block. A buffer plate is installed on the right side of the first mounting groove. A filter screen is installed between second mounting grooves formed on the left and right sides of the inner wall of the filter press body. This patented filter press for metronidazole production incorporates a buffer plate. When the metronidazole solution enters the filter press body from the feed inlet, the solution is buffered by the buffer plate before falling onto the filter screen for filtration, reducing wear on the filter screen. Although this utility model patent reduces the impact of the metronidazole solution entering from the feed inlet on the filter screen below by setting a buffer plate, the buffer plate is only a flat plate tilted at a certain angle. All the entering metronidazole solution will only reach the filter screen from the lowest point of the buffer plate after passing through the buffer plate. Although the impact of the entering metronidazole solution on the filter screen is reduced, all the metronidazole solution will fall into the vicinity of the filter screen closest to the buffer plate, while the filter screen farther away from the lowest point of the buffer plate will have very little metronidazole solution passing through. That is to say, the metronidazole solution cannot pass through the entire filter screen, which can easily lead to uneven use of the filter screen, resulting in waste of filter screen and increased production costs.

[0005] Meanwhile, in existing filtration devices, the filter screens need to be replaced when they reach the end of their service life or when their filtration effect deteriorates. The solution provided in the aforementioned patent CN218306445U only improves the operation method of replacing the filter screen; it still requires regular replacement of the filter screen. Summary of the Invention

[0006] The purpose of this invention is to provide a metronidazole filtration device that addresses the shortcomings of existing filtration devices. On the one hand, it reduces the impact of the mixed liquid on the filter screen, thereby reducing filter screen wear. On the other hand, it enables reverse cleaning of the filter screen, reducing the frequency of filter screen replacement and further improving the service life of the filter screen.

[0007] The objective of this invention is achieved through the following technical solution: A feed inlet and a vent are provided at the top of the filter tank, both equipped with valves. A discharge port is provided at the bottom of the filter tank, with a drain valve installed at the discharge port. The top of the filter tank can be opened entirely for easy installation of internal components.

[0008] The filter tank is internally arranged from top to bottom as follows: a buffer unit, a flushing unit, and a filtration unit. The buffer unit mainly consists of a support beam, a support column, a buffer slope, and a platform. The flushing unit is located directly below the support beam of the buffer unit. A water supply pipe is installed at one end of the support beam where it meets the inner wall of the filter tank. The water supply pipe extends upwards to the top side of the filter tank and leads to the outside. A valve is installed at the external end of the water supply pipe to control the water supply from the outside into the pipe. The other end of the water supply pipe passes through the support beam and connects to the water pipe of the flushing unit located below the support beam.

[0009] The support beams are configured as a first and a second support beam that intersect perpendicularly. Both ends of the first and second support beams are perpendicular to the inner wall of the filter tank and are movably overlapped. Support platforms fixed to the inner wall of the filter tank are provided at the connection points of the first and second support beams. The two ends of the support beams are placed horizontally on the support platforms, and the support beams and support platforms are movably overlapped to facilitate the removal of the buffer unit as a whole.

[0010] Since the water pipe of the rinsing unit is fixedly connected to the bottom of the support beam, the rinsing unit is removed along with the buffer unit. Furthermore, the water supply pipe is connected to the water pipe of the rinsing unit, so both the water supply pipe and the rinsing unit are removed simultaneously with the buffer unit. When the buffer unit is placed back into the filter tank, the aforementioned water supply pipe and the water pipe of the rinsing unit are simultaneously placed into the filter tank.

[0011] Several support columns are installed above the support beams to support the buffer slope of the buffer unit. A central support column at the intersection of the first and second support beams supports the first buffer slope in the central area. First, second, third, and fourth support columns are respectively installed at equidistant points from the intersection of the first and second support beams to collectively support the second buffer slope.

[0012] The first buffer slope is a conical sloping plate with downward-sloping edges, forming an umbrella-shaped structure with the central support column. The second buffer slope is similar in shape to the first buffer slope, being a three-dimensional structure with an annular shape and an inverted V-shaped cross-section. A first platform and a second platform extend outwards from the two sides of the second buffer slope, respectively. The upper surface of the platform is nearly horizontal, and its outermost edge is slightly lower than the connection point between the platform and the second buffer slope. This design facilitates the flow of liquid down the platform, preventing liquid accumulation.

[0013] The center of the first buffer slope coincides with the center of the circular structure formed by the second buffer slope. The vertical lines of the four edges of the first buffer slope are aligned with the highest point of the second buffer slope, ensuring that liquid falling from the first buffer slope lands precisely on the highest point of the second buffer slope and flows down along both sides of the second buffer slope.

[0014] The main function of the first buffer slope is to reduce the impact force of the mixture fed into the feed inlet directly above the first buffer slope and to evenly disperse the mixture. The mixture flows down through the first buffer plate and reaches the top of the second buffer plate. The second buffer slope further reduces the impact force of the mixture and further disperses the mixture in all directions, eventually reaching the filter screen below.

[0015] Several openings are provided on the first buffer slope, the second buffer slope, the first platform, and the second platform, so that some of the liquid flowing on the buffer slope and the platform can fall into the filter screen below through the openings, further improving the uniform dispersion of the mixture on the filter screen.

[0016] The buffering effect of the aforementioned buffer slope and platform greatly reduces the impact force of the mixture entering through the inlet. Furthermore, the mixture flowing down through the openings on the buffer slope and platform does not flow vertically or in a concentrated manner, thus significantly reducing its impact on the filter screen. This reduces wear on the filter screen and allows for uniform dispersion of the mixture on the screen for filtration.

[0017] In this invention, to improve the buffering effect of the buffer slope, multiple buffer slopes can be set up. While increasing the buffering effect, this also further improves the uniformity of the dispersion of the mixture on the filter screen. However, setting up multiple buffer slopes also increases the complexity of the equipment, increases the equipment cost, and increases the difficulty of cleaning. Therefore, a two-stage buffer slope is preferred.

[0018] The lower surfaces of the first and second support beams, which intersect perpendicularly in the aforementioned buffer unit, are provided with open grooves. The first and second water pipes of the rinsing unit are fixedly installed within these grooves, and water outlets are evenly distributed on both pipes. The lowest points of the first and second water pipes are not lower than the lowest points of the support beams, ensuring that when the support beams overlap with the support platform, the first and second water pipes and the water supply pipe will not interfere with the support platform.

[0019] The first and second water pipes are connected to a water supply pipe installed on the inner wall of the filter tank. High-pressure water is supplied to the first and second water pipes by an external water supply unit through the water supply pipes, and is discharged under high pressure through the water outlet onto the filter screen below, thereby achieving high-pressure rinsing of the filter screen.

[0020] The filter screen is circular, with its outer diameter equal to the inner diameter of the filter tank, and it fits perfectly horizontally against the inner wall of the filter tank. A support rod is installed below the filter screen, with both ends connected to the inner wall of the filter tank. A first protrusion and a second protrusion are respectively installed on the outer wall of the filter tank at the connection points with the support rod. A bearing is installed inside the first protrusion, and one end of the support rod is connected to the bearing, allowing it to rotate around the bearing. A bearing is also installed inside the second protrusion, connecting to the other end of the support rod. The support rod passes through the second protrusion and is connected to a motor located outside the second protrusion; the movement of the motor drives the rotation of the support rod.

[0021] A fixing block is installed on the support rod. The fixing block consists of an upper fixing block and a lower fixing block. The lower fixing block is fixedly connected to the support rod, and the upper fixing block is movably connected to the lower fixing block via a connecting shaft, allowing the upper fixing block to rotate relative to the lower fixing block at a certain angle, preferably 90°. The upper and lower fixing blocks are preferably rectangular. The height of the lower fixing block is not less than the thickness of the filter screen.

[0022] When the upper fixed block and the lower fixed block are at 0°, that is, in the initial state, the vertical projection of the upper fixed block falls completely within the vertical projection of the lower fixed block.

[0023] A partition plate is installed in the middle area of ​​the filter screen, penetrating the screen and coinciding with the support rod below. The width of the partition plate is greater than or equal to the width of the support rod. The upper surface of the partition plate is convex. The function of the partition plate is to prevent the mixed liquid from entering the filter screen when it reaches the screen. Because of the support rod, the area of ​​the filter screen corresponding to the support rod cannot filter, and the mixed liquid in that area accumulates inside the screen. The partition plate prevents this, and its convex surface helps to divert any mixed liquid dripping onto the top of the partition plate to the sides, reducing waste caused by incomplete filtration.

[0024] A first slot and a second slot, whose position and size perfectly match the lower fixing block on the support rod, are provided at both ends of the filter screen partition plate. When installing the filter screen, first restore the upper and lower fixing blocks on the support rod to their initial state, i.e., at a 0° angle. Then, place the filter screen horizontally into the filter tank, aligning the first and second slots with the first and second lower fixing blocks respectively, so that the first and second lower fixing blocks pass through the first and second slots. Next, rotate the first and second upper fixing blocks by a certain angle, preferably 90°. At this point, the first and second upper fixing blocks respectively lock onto both ends of the filter screen partition plate, thus fixing the filter screen to the support rod.

[0025] The support rod can rotate 360° under the drive of the motor, which in turn can drive the filter screen to rotate 360°.

[0026] When the filtration device has been used for a certain period of time or the filtration effect decreases, cleaning water is introduced through the feed inlet at the top of the filter tank to wash away the residual mixture on the buffer unit above the filter tank. Then, the motor is started to rotate the support rod 180°. At this time, the support rod drives the filter screen to rotate 180° synchronously. Due to the locking action of the upper fixing block, the filter screen will not fall off the support rod. Next, the flushing unit is activated, supplying high-pressure water from outside the filter tank through the water supply pipe. The high-pressure water is sprayed out from the outlet holes on the first and second water pipes, performing high-pressure flushing on the back of the filter screen below, washing out any impurities remaining inside the filter screen. The flushed impurities are discharged from the discharge port at the bottom of the filter tank.

[0027] The motor can control the support rod to rotate at any angle and stop. That is, when the flushing unit performs high-pressure flushing on the filter screen, the motor can control the filter screen to rotate at any angle to perform high-pressure flushing on it from multiple angles.

[0028] The beneficial effects of this utility model are as follows:

[0029] 1. By setting a buffer slope, the impact force on the filter screen caused by the flow rate and gravity after the mixed liquid is added is reduced, thereby reducing the wear and tear on the filter screen and extending its service life.

[0030] 2. The multi-stage buffer slope and the several openings on the buffer slope and platform facilitate the flow of some of the mixed liquid through the openings to the filter screen, thereby improving the uniformity of the dispersion of the mixed liquid on the filter screen.

[0031] 3. An open groove is set below the support beam, and a flushing unit is set in the groove. This simplifies the equipment structure and avoids interference between components while achieving high-pressure flushing of the filter screen.

[0032] 4. The filter screen is fixed on the support rod. The motor drives the support rod to rotate, so that the filter screen can be rotated to any angle for high-pressure washing, which improves the service life and lifespan of the filter screen.

[0033] 5. A partition plate is installed in the area where the middle of the filter screen overlaps with the lower support rod. The upper surface of the partition plate is convex, which helps the mixture to flow to the filter screen on both sides of the partition plate, avoiding the retention of unfiltered mixture in the support rod area, thus reducing waste of the mixture and lowering raw material costs. Attached Figure Description

[0034] Figure 1 Schematic diagram of the cross-section of the filter device;

[0035] Figure 2 Top view of the filter screen;

[0036] Figure 3 Side view of the filter screen;

[0037] Figure 4 Schematic diagram of the initial state of the filter screen fixing unit;

[0038] Figure 5 Schematic diagram of the fixed state of the filter screen fixing unit;

[0039] Figure 6 3D schematic diagram of the initial state of the filter screen fixing unit;

[0040] Figure 7 3D schematic diagram of the filter fixing unit in its fixed state;

[0041] Figure 8 Top view of the filter screen in its fixed state;

[0042] Figure 9 Top view of the buffer unit;

[0043] Figure 10 A three-dimensional schematic diagram of the location of the second buffer slope and platform in the buffer unit;

[0044] Figure 11A three-dimensional schematic diagram of the second buffer slope and the openings on the platform in the buffer unit;

[0045] Figure 12 Bottom view of the flushing unit location.

[0046] Figure label:

[0047] 11 Filter tank; 12 Inlet; 13 Vent; 14 Support beam; 141 First buffer slope; 142 Second buffer slope; 143 First platform; 144 Second platform; 15 Support rod; 151 First protrusion; 152 Second protrusion; 16 Motor; 17 Filter screen; 18 Discharge port; 19 Discharge valve; 20 Water supply pipe; 21 Washing unit; 22 Support platform; 171 Partition plate; 1721 First slot; 1722 Second slot; 1711 Convex surface; 31 Upper Fixed block; 32 Lower fixed block; 33 Connecting shaft; 311 First lower fixed block; 312 Second lower fixed block; 321 First upper fixed block; 322 Second upper fixed block; 91 Inner wall of filter tank; 1401 First support beam; 1402 Second support beam; 1008 Central support column; 1001 First support column; 1002 Second support column; 1003 Third support column; 1101 Opening; 1201 First water pipe; 1202 Second water pipe; 1203 Water outlet. Detailed Implementation

[0048] To fully understand the filtration device in this technical solution, the following embodiments are provided for specific and detailed explanation.

[0049] Example 1

[0050] like Figure 1 As shown, the filter tank 11 in this embodiment is provided with a feed inlet 12 and a vent 13 at the top, and valves are provided at both the feed inlet 12 and the vent 13. The filter tank 11 is provided with a discharge port 18 at the bottom, and a discharge valve 19 is provided at the discharge port 18. The top of the filter tank 11 can be opened as a whole (not shown in the figure) to facilitate the installation of the internal components of the filter tank 11.

[0051] The filter tank 11 mainly consists of two parts: an upper buffer unit and a flushing unit 21, and a lower filter unit. The upper buffer unit mainly includes a support beam 14, a support column, a buffer slope, and a platform. The flushing unit 21 is located directly below the support beam 14 of the buffer unit. A water supply pipe 20 is installed at one end of the support beam 14 where it meets the inner wall 91 of the filter tank. The water supply pipe 20 extends upward to the top side of the filter tank 11 and leads to the outside. A valve is installed at the external end of the water supply pipe 20 to control the water supply from the outside into the water supply pipe 20. The other end of the water supply pipe 20 passes through the support beam 14 and connects to the water pipe of the flushing unit 21 below the support beam 14.

[0052] like Figure 1, 9 As shown, the support beams 14 are configured as a first support beam 1401 and a second support beam 1402 that intersect perpendicularly. Both ends of the first support beam 1401 and the second support beam 1402 are perpendicular to the inner wall of the filter tank 11 and are movably overlapped. Support platforms 22, fixed to the inner wall 91 of the filter tank, are provided at the connection points between the first support beam 1401 and the second support beam 1402 and the inner wall of the filter tank 11. The two ends of the support beams 14 are placed horizontally on the support platforms 22, and the support beams 14 and the support platforms 22 are movably overlapped, facilitating the removal of the buffer unit as a whole.

[0053] Since the water pipe of the rinsing unit 21 is fixedly connected to the lower part of the support beam 14, the rinsing unit 21 is also removed when the entire buffer unit is taken out. Furthermore, the water supply pipe 20 is connected to the water pipe of the rinsing unit 21, so both the water supply pipe 20 and the rinsing unit 21 are removed simultaneously with the buffer unit. When the buffer unit is placed back into the filter tank 11, the aforementioned water supply pipe 20 and the water pipe of the rinsing unit 21 are simultaneously placed into the filter tank 11.

[0054] like Figure 1 , 10 As shown, several support columns are installed above the support beam 14 to support the buffer slope of the buffer unit. The support columns include a central support column (1008), a first support column 1001, a second support column 1002, a third support column 1003, and a fourth support column (not shown in the figure). The central support column, located at the intersection of the first support beam 1401 and the second support beam 1402, supports the first buffer slope 141 in the central area. On the first support beam 1401 and the second support beam 1402, the first support column 1001, the second support column 1002, the third support column 1003, and the fourth support column are respectively installed at equidistant points from the intersection of the first support beam 1401 and the second support beam 1402 to jointly support the second buffer slope 142.

[0055] The aforementioned first buffer slope 141 is a conical inclined plate with downward sloping edges, forming an umbrella-shaped structure with the central support column. The aforementioned second buffer slope 142 has a similar shape to the first buffer slope 141. The second buffer slope 142 is an overall annular three-dimensional structure with an inverted V-shaped cross-section. A first platform 143 and a second platform 144 are respectively provided extending outward from the two sides of the second buffer slope 142. The upper surface of the platform is nearly horizontal, and its outermost edge is slightly lower than the connection end between the platform and the second buffer slope 142. This arrangement facilitates the flow of liquid down the platform and prevents liquid from accumulating on the platform.

[0056] The center of the first buffer slope 141 coincides with the center of the circular structure formed by the second buffer slope 142. The vertical lines of the four edges of the first buffer slope 141 are aligned with the highest point of the second buffer slope 142, ensuring that the liquid falling from the first buffer slope 141 lands precisely on the highest point of the second buffer slope 142 and flows down along both sides of the second buffer slope 142.

[0057] The main function of the first buffer slope 141 is to reduce the impact force of the mixture fed into the feed inlet 12 directly above the first buffer slope 141 and to evenly disperse the fed mixture. The mixture flows down through the first buffer plate and reaches the top of the second buffer plate. The second buffer slope 142 further reduces the impact force of the mixture and further disperses the mixture to the surrounding area, eventually reaching the filter screen 17 below.

[0058] like Figure 11 As shown, several openings 1101 are provided on the first buffer slope 141, the second buffer slope 142, the first platform 143, and the second platform 144, so that some of the liquid flowing on the buffer slope and the platform can fall into the filter screen 17 below through the openings 1101, further improving the uniform dispersion of the mixture on the filter screen 17.

[0059] Through the buffering effect of the aforementioned buffer slope and platform, the impact force of the mixture entering through the feed inlet 12 is greatly reduced. Furthermore, the mixture flowing down through the opening 1101 on the buffer slope and platform does not flow vertically through the opening 1101, nor does it flow down in a concentrated manner. Therefore, its impact force on the filter screen 17 is greatly reduced, thereby reducing the wear of the filter screen 17 and enabling the mixture to be evenly dispersed on the filter screen 17 for filtration.

[0060] like Figure 12 As shown, the lower surfaces of the first support beam 1401 and the second support beam 1402, which intersect perpendicularly in the buffer unit, are provided with open grooves. The first water pipe 1201 and the second water pipe 1202 of the rinsing unit 21 are fixedly installed in the grooves, and water outlet holes 1203 are evenly provided on the first water pipe 1201 and the second water pipe 1202. The lowest point of the first water pipe 1201 and the second water pipe 1202 is not lower than the lowest point of the support beam 14, ensuring that when the support beam 14 is placed overlapping the support platform 22, the first water pipe 1201, the second water pipe 1202, and the water supply pipe 20 will not interfere with the support platform 22.

[0061] The first water pipe 1201 and the second water pipe 1202 are connected to the water supply pipe 20 located on the inner wall of the filter tank 11. High-pressure water is supplied to the first water pipe 1201 and the second water pipe 1202 through the water supply pipe 20 by an external water supply unit (not shown in the figure), and is discharged under high pressure through the water outlet 1203 onto the filter screen 17 below, thereby achieving high-pressure rinsing of the filter screen 17.

[0062] like Figure 1 , 2 As shown, the filter screen 17 is circular, with its outer diameter equal to the inner diameter of the filter tank 11. The filter screen 17 fits horizontally against the inner wall 91 of the filter tank. A support rod 15 is installed below the filter screen 17, with both ends of the support rod 15 connected to the inner wall 91 of the filter tank. A first protrusion 151 and a second protrusion 152 are respectively installed on the outer wall of the filter tank 11 at the connection points with the two ends of the support rod 15. A bearing is installed inside the first protrusion 151, and one end of the support rod 15 is connected to the bearing and can rotate around the bearing. A bearing is installed inside the second protrusion 152 and connected to the other end of the support rod 15. The support rod 15 passes through the second protrusion 152 and is connected to a motor 16 installed outside the second protrusion 152. The movement of the motor 16 drives the rotation of the support rod 15.

[0063] like Figure 2 , 4 As shown in Figure 8, the support rod 15 is equipped with a fixing block, which consists of an upper fixing block 31 and a lower fixing block 32. The lower fixing block 32 is fixedly connected to the support rod 15, and the upper fixing block 31 is movably connected to the lower fixing block 32 via a connecting shaft 33, allowing the upper fixing block 31 to rotate 90° relative to the lower fixing block 32. Both the upper fixing block 31 and the lower fixing block 32 are rectangular parallelepipeds. The height of the lower fixing block 32 is equal to the thickness of the filter screen 17.

[0064] When the upper fixed block 31 and the lower fixed block 32 are at 0°, that is, in the initial state, the vertical projection of the upper fixed block 31 falls completely within the vertical projection of the lower fixed block 32.

[0065] like Figure 2 , 3As shown, a partition plate 171 is provided in the middle area of ​​the filter screen 17. The partition plate 171 penetrates the filter screen 17 and its position coincides with the support rod 15 below. The width of the partition plate 171 is equal to the width of the support rod 15 below. The upper surface of the partition plate 171 is a convex surface 1711. The function of the partition plate 171 is that when the mixture above reaches the filter screen 17, because the support rod 15 is provided below, the area of ​​the filter screen 17 corresponding to the support rod 15 cannot perform the filtering function. At this time, the mixture in the area of ​​the filter screen 17 in the area of ​​the support rod 15 cannot pass through the filter screen 17 and accumulates inside the filter screen 17. The partition plate 171 in the area of ​​the filter screen 17 corresponding to the support rod 15 can prevent the mixture from entering. At the same time, the convex surface 1711 on the upper surface of the partition plate 171 helps the mixture dripping on the top of the partition plate 171 to flow to both sides and fall onto the filter screens 17 on both sides of the partition plate 171, reducing the waste of the mixture due to insufficient filtration.

[0066] like Figures 4-8 As shown, a first slot 1721 and a second slot 1722 are provided at both ends of the separator plate 171 of the filter screen 17, with positions and sizes that perfectly match the lower fixing blocks 32 on the support rod 15. When installing the filter screen 17, first restore the upper fixing blocks 31 and lower fixing blocks 32 on the support rod 15 to their initial state, i.e., the upper fixing blocks 31 and lower fixing blocks 32 form a 0° angle. Then, place the filter screen 17 horizontally into the filter tank 11, aligning the first slot 1721 and the second slot 1722 with the first lower fixing blocks 311 and the second lower fixing blocks 312, respectively, so that the first lower fixing blocks 311 and the second lower fixing blocks 312 pass through the first slot 1721 and the second slot 1722, respectively. Afterward, rotate the first upper fixing blocks 321 and the second upper fixing blocks 322 by 90°. At this point, the first upper fixing blocks 321 and the second upper fixing blocks 322 respectively lock the two ends of the separator plate 171 on the filter screen 17, thus fixing the filter screen 17 to the support rod 15.

[0067] like Figure 1 As shown, the support rod 15 can rotate 360° under the drive of the motor 16, which in turn can drive the filter screen 17 to rotate 360°.

[0068] When the filtration device has been used for a certain period of time or the filtration effect decreases, cleaning water is introduced through the feed inlet 12 at the top of the filter tank 11 to wash away the residual mixture on the buffer unit inside the filter tank 11. Then, the motor 16 is started to rotate the support rod 15 180°. At this time, the support rod 15 drives the filter screen 17 to rotate 180° synchronously. Due to the locking action of the upper fixing block 31, the filter screen 17 will not fall off the support rod 15. Next, the rinsing unit 21 is started, supplying high-pressure water from outside the filter tank 11 through the water supply pipe 20. The high-pressure water is sprayed out from the outlet holes 1203 on the first water pipe 1201 and the second water pipe 1202, performing high-pressure rinsing on the back of the filter screen 17 below, washing out the impurities remaining inside the filter screen 17. The washed-out impurities are discharged from the discharge port 18 at the bottom of the filter tank 11.

[0069] The motor 16 can control the support rod 15 to rotate at any angle and stop. That is, when the flushing unit 21 performs high-pressure flushing on the filter screen 17, the motor 16 can control the filter screen 17 to rotate at any angle and perform high-pressure flushing on it from multiple angles.

[0070] It should be noted that in this utility model, terms such as "upper", "lower", "front", "back", "bottom", "top", and "both sides" are used to describe the positional relationships in the accompanying drawings of this utility model and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to these relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0071] The above description is a detailed description of the preferred embodiments of the present utility model. However, the embodiments are not intended to limit the scope of the patent application of the present utility model. All equivalent changes or modifications made under the technical spirit of the present utility model should fall within the patent scope covered by the present utility model.

Claims

1. A metronidazole filtration device, comprising a filter tank (11), characterized in that, It also includes a buffer unit, a rinsing unit (21), and a filtration unit. The top of the filtration tank (11) is provided with an inlet (12) and an air vent (13), and the bottom is provided with a discharge port (18). The upper end of the filtration tank (11) is provided with a buffer unit, and the lower end is provided with a filtration unit. A rinsing unit (21) is provided between the buffer unit and the filtration unit. The buffer unit is composed of a buffer slope, a support column, and a support beam (14). The support column is vertically installed on the upper surface of the support beam (14) to support the buffer slope. The rinsing unit (21) is provided with a buffer slope, a rinsing unit (21), a filtration ... Below the support beam (14); the filter unit includes a filter screen (17), a support rod (15) and a motor (16). The motor (16) is located outside the filter tank (11). One end of the support rod (15) passes through the tank wall of the filter tank (11) and is connected to the output end of the motor (16). One end of the support rod (15) located inside the filter tank (11) is fixedly connected to the filter screen (17) by a fixing block. The motor (16) can drive the filter screen (17) to rotate through the support rod (15).

2. The metronidazole filtration device according to claim 1, characterized in that, The buffer slope is divided into a first buffer slope (141) and a second buffer slope (142). The support columns include a central support column (1008), a first support column (1001), a second support column (1002), a third support column (1003), and a fourth support column. The first buffer slope (141) is located on top of the central support column (1008). The first buffer slope (141) is a conical inclined plate with downward sloping edges, which together with the central support column (1008) forms an umbrella-shaped structure. The second buffer slope (142) is a three-dimensional structure with a circular ring and an inverted V-shaped cross-section. 42) The first platform (143) and the second platform (144) are respectively extended outward from the inner and outer edges. The upper surfaces of the first platform (143) and the second platform (144) are nearly horizontal, and the horizontal height of their outermost edges is slightly lower than the horizontal height of their connection with the second buffer slope (142). The vertical lines of the four edges of the first buffer slope (141) and the highest point of the second buffer slope (142) are on the same vertical line. The first support column (1001), the second support column (1002), the third support column (1003) and the fourth support column are uniformly and vertically arranged below the second buffer slope (142).

3. The metronidazole filtration device according to claim 2, characterized in that, The first buffer slope (141), the second buffer slope (142), the first platform (143), and the second platform (144) are all provided with a number of through holes (1101).

4. The metronidazole filtration device according to claim 1, characterized in that, The support beam (14) is composed of a first support beam (1401) and a second support beam (1402) that intersect each other perpendicularly. The two ends of the first support beam (1401) and the second support beam (1402) are respectively movably connected to the support platform (22) fixed to the inner side wall of the filter tank (11). The lower surfaces of the first support beam (1401) and the second support beam (1402) are provided with open grooves.

5. A metronidazole filtration device according to claim 4, characterized in that, The first support beam (1401) and the second support beam (1402) are respectively provided with a first water pipe (1201) and a second water pipe (1202) in their grooves, and both the first water pipe (1201) and the second water pipe (1202) are provided with water outlet holes (1203).

6. A metronidazole filtration device according to claim 5, characterized in that, The filter tank (11) is provided with a water supply pipe (20) on its inner wall, and the water supply pipe (20) is connected to the first water pipe (1201) and the second water pipe (1202).

7. A metronidazole filtration device according to claim 6, characterized in that, The support rod (15) passes through the interior of the filter tank (11) and its two ends are located on the outer side of the inner wall (91) of the filter tank. A first protrusion (151) and a second protrusion (152) are symmetrically arranged on the outer wall of the filter tank (11) and are connected. The first protrusion (151) and the second protrusion (152) are rotatably connected to the two ends of the support rod (15) through the internal bearings. One end of the support rod (15) passes through the second protrusion (152) and is connected to a motor (16) located outside the second protrusion (152). The motor (16) can drive the support rod (15) to rotate.

8. A metronidazole filtration device according to claim 7, characterized in that, The support rod (15) is provided with two sets of fixing blocks. The fixing blocks are divided into an upper fixing block (31) and a lower fixing block (32). The lower fixing block (32) is fixedly connected to the support rod (15). The upper fixing block (31) is movably connected to the lower fixing block (32) through a connecting shaft (33). The upper fixing block (31) can rotate relative to the lower fixing block (32) by a certain angle through the connecting shaft (33). The height of the lower fixing block (32) is not less than the thickness of the filter screen (17). When the upper fixing block (31) and the lower fixing block (32) are at a 0° angle, this is the initial state. At this time, the vertical projection of the upper fixing block (31) falls completely into the vertical projection of the lower fixing block (32). The two sets of fixing blocks respectively include a first lower fixing block (311) and a first upper fixing block (321), a second lower fixing block (312) and a second upper fixing block (322).

9. A metronidazole filtration device according to claim 8, characterized in that, The filter screen (17) is shaped to match the inner wall (91) of the filter tank. A partition plate (171) is provided on the middle area of ​​the support rod (15) corresponding to the filter screen (17). The partition plate (171) runs through the filter screen (17), and the width of the partition plate (171) is not less than the width of the support rod (15). The upper surface of the partition plate (171) is a convex surface (1711).

10. A metronidazole filtration device according to claim 9, characterized in that, The partition plate (171) has a first slot (1721) and a second slot (1722) at both ends, which are in position and size that are completely matched with the lower fixing block (32). Both the first slot (1721) and the second slot (1722) can pass through the first lower fixing block (311) and the second lower fixing block (312).

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