A seedling-raising pool purification device and method

Abstract

The present invention relates to the technical field of seedling-raising water tanks, and discloses a purification device and method for a seedling-raising water tank, which includes a filtration bin and a housing. A feeding pipe is connected to the housing. The upper end of the filtration bin is connected to a mixing bin. An outlet pipe is connected to one side of the mixing bin. A filter screen is connected inside the filtration bin. A partition plate is connected inside the mixing bin. A feeding port is opened on the partition plate. A connecting frame is arranged above the partition plate. A cover plate is connected to the lower end of the connecting frame. The cover plates and the feeding ports are in one-to-one correspondence. The upper end of the connecting frame is connected to a jacking frame. One end of the jacking frame is rotatably connected to a roller. A motor is connected to the filtration bin. The output end of the motor is connected to a cam. The outer side of the cam is in rolling contact with the roller. The present invention utilizes a strip-shaped filter screen structure to enhance the filtration effect, avoid serious blockage of the filter holes at specific positions on the filter screen caused by filtration at a single position, and cooperate with the brushing of the filter screen by the cleaning plate to prevent impurities from accumulating on the filter screen and interfering with subsequent filtration.

Description

Technical Field

[0001] The present invention relates to the technical field of seedling cultivation pools, and in particular to a purification device and method for seedling cultivation pools. Background Art

[0002] The seedling cultivation pool creates a dedicated growth environment for seedlings and is widely used in the fields of flower and aquatic product seedling cultivation. It can provide water bodies, regulate temperature, assist in reproduction, and improve the hatching rate. It is very necessary to filter and purify large particulate impurities in the pool, which not only affects the clarity and transparency of the water quality, but may also block the circulation and filtration equipment, causing problems with water flow and dissolved oxygen. In addition, impurities are prone to carry germs, increasing the risk of seedlings getting infected, interfering with their light and nutrient absorption, and hindering growth.

[0003] The water quality of the seedling cultivation pool contains a lot of impurities, such as undissolved fertilizer particles, remains of aquatic organisms, introduced dust, and particulate matter from equipment wear, etc., all of which will affect the quality of seedling cultivation. Some seedling cultivation varieties have strict requirements for water quality. Filtration can remove impurities according to particle size and solubility to meet the high-standard water quality required for high-quality seedling cultivation, ensuring the stable growth and healthy development of seedlings. It is of great significance for seedling cultivation of flowers, aquatic products, etc. However, the traditional filtration equipment for the water quality of seedling cultivation pools has a simple structure. During the filtration process, some impurities will cause the filter screen to become blocked. As the filtration operation progresses, the filtration efficiency of the filtration structure will decrease due to the blockage. Therefore, it is necessary to regularly clean the filter screen in the filtration structure to ensure that the seedling cultivation water is not affected by large particulate impurities and can be in an efficient seedling cultivation state. The regular cleaning operation is time-consuming and laborious. Moreover, during the filtration of the seedling cultivation water, a large amount of seedling cultivation water passes through the filter screen, which will increase the burden on the filter screen. It is necessary to shut down the pipeline for transporting the seedling cultivation water during filtration. After the filtration is completed, the seedling cultivation water is then introduced onto the filter screen. The operation is cumbersome, and the operator cannot well master the filtration frequency, affecting the filtration efficiency.

[0004] Based on this, a purification device and method for seedling cultivation pools are proposed. Summary of the Invention

[0005] The purpose of the present invention is to propose a purification device and method for seedling cultivation pools in order to solve the above problems.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A seedling-raising pond purification device and method, comprising a filtration chamber and a housing. A feeding pipe is connected to the housing. The upper end of the filtration chamber is connected to a mixing chamber. An outlet pipe is connected to one side of the mixing chamber. A filter screen is connected inside the filtration chamber. A partition is connected inside the mixing chamber. A feeding port is formed in the partition. A connecting frame is arranged above the partition. A cover plate is connected to the lower end of the connecting frame, and the cover plates and the feeding ports correspond one by one. The upper end of the connecting frame is connected to a jacking frame. A roller is rotatably connected to one end of the jacking frame. A motor is connected to the filtration chamber. The output end of the motor is connected to a cam. The outer side of the cam is in rolling contact with the roller. A side port is formed in one side of the filtration chamber. A support frame is arranged on one side of the side port. A limiting plate is connected to the upper end of the support frame through a fixing block. A connecting column is connected between the limiting plates. A brushing mechanism for brushing the upper surface of the filter screen is connected between the limiting plates.

[0008] Preferably, a deflecting rod is fixedly connected inside the mixing chamber. A guiding plate is connected to the deflecting rod, and the guiding plate is arranged below the partition.

[0009] Preferably, there are multiple deflecting rods and guiding plates. The multiple guiding plates are symmetrically arranged in an inverted V shape inside the mixing chamber.

[0010] Preferably, a slider is connected to the outside of the connecting frame. A side sliding groove is formed on the inner wall of the mixing chamber. One end of the slider is slidably connected to the side sliding groove.

[0011] Preferably, a return spring is connected to the connecting frame. A spring plate is connected to the mixing chamber. The upper end of the return spring is connected to the lower end of the spring plate.

[0012] Preferably, the brushing mechanism includes a cleaning plate. A brush is connected to the lower end of the cleaning plate. A first sliding rod and a second sliding rod are connected to the cleaning plate. An L-shaped groove is formed on the limiting plate. Both the first sliding rod and the second sliding rod are slidably connected to the L-shaped groove. A driving member for driving the first sliding rod to slide on the L-shaped groove is connected to the first sliding rod.

[0013] Preferably, a connecting seat is connected between the limiting plate and the filtration chamber. A placing plate is clamped on the connecting seat, and the placing plate is arranged directly below the cleaning plate.

[0014] Preferably, the driving member includes a traction frame. One end of the traction frame is rotatably connected to one end of the first sliding rod. A turntable is connected to the outside of the cam. A traction shaft is connected to the outside of the turntable and is not connected to the center. The other end of the traction frame is rotatably connected to the traction shaft.

[0015] A seedling-raising pond purification method, using a seedling-raising pond purification device, comprises the following steps:

[0016] S1: Pass the seedling water into the mixing chamber, start the motor, drive the cam to rotate, so that the seedling water intermittently enters the filtering chamber through the filter screen;

[0017] S2: Use the synchronously rotating turntable and the traction shaft to pull the sliding rod to slide on the L-shaped groove, so that after the filter screen filters and purifies the seedling water, the cleaning plate can enter the top of the filter screen to clean the impurities attached to it. After cleaning, the seedling water continues to be discharged and the filtration and purification of the seedling water continues. The purification and cleaning operations are carried out alternately until the seedling water in the mixing bin is filtered and purified.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0019] 1. The present application adopts a filter structure and utilizes a long strip filter structure to increase the filtering effect, avoid serious blockage of filter holes at specific positions on the filter caused by filtering at a single position, and cooperate with the cleaning plate to brush the filter to avoid large particles of impurities from accumulating on the filter and interfering with subsequent filtration. During the cleaning process, the cleaning plate will scrape the bristles through the placement plate to avoid impurities adhering to the bristles, ensuring that the cleaning plate remains clean each time cleaning, thereby improving cleaning efficiency and ensuring that the filter is always in a high-efficiency filtration state.

[0020] 2. The present application adopts a cover plate structure, utilizes the cooperation between the cover plate and the partition plate, and relies on a cam structure to drive the cover plate to rise and fall, so that the seedling water can intermittently complete the feeding and filtering operation, reducing the load of the filter screen for filtering large quantities of seedling water, and utilizes the connection between the cam and the turntable to allow filtering and cleaning to operate alternately, avoiding the movement of the cleaning plate to interfere with the filtering operation of the filter screen, while also maintaining the high-efficiency filtering state of the filter screen, thereby improving the filtering efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic structural diagram of a filtering device provided in an embodiment of the present invention is shown;

[0022] Figure 2 A schematic diagram of a half-section structure of a housing provided according to an embodiment of the present invention is shown;

[0023] Figure 3 A schematic diagram of the structure inside a housing provided according to an embodiment of the present invention is shown;

[0024] Figure 4 It shows a schematic structural diagram of a connection portion of a connection socket provided in an embodiment of the present invention;

[0025] Figure 5 A schematic diagram of an exploded structure of a cover plate connection provided by an embodiment of the present invention is shown;

[0026] Figure 6Shows a schematic structural diagram of the connection part of the filter screen according to an embodiment of the present invention;

[0027] Figure 7 Shows an exploded structural diagram of the connection part of the cleaning plate according to an embodiment of the present invention.

[0028] Legend:

[0029] 1. Filter chamber; 2. Mixing chamber; 3. Support frame; 4. Limiting plate; 5. Discharge pipe; 6. Turntable; 7. Cam; 8. Traction shaft; 9. Traction frame; 10. First sliding rod; 11. Second sliding rod; 12. Cleaning plate; 13. Connection seat; 14. L-shaped groove; 15. Placing plate; 16. Spring plate; 17. Lifting frame; 18. Roller; 19. Motor; 20. Fixed block; 21. Side port; 22. Side chute; 23. Partition board; 24. Feeding port; 25. Connection frame; 26. Cover plate; 27. Return spring; 28. Slide block; 29. Deflection rod; 30. Guide plate; 31. Filter screen; 32. Brush bristles; 33. Connection column; 34. Shell; 35. Feeding pipe. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Please refer to Figures 1-7 , the present invention provides a technical solution:

[0032] A seedling-raising pond purification device and method, including a filtration bin 1 and a housing 34. A blanking pipe 35 is connected to the housing 34. The housing 34 is a combined structure. Among them, the housing 34 on one side of the filtration bin 1 and the housing 34 on one side of the limit plate 4 can be assembled by plugging. During the operation of the equipment, it is necessary to ensure that the housings 34 are closed to facilitate subsequent cleaning of the impurities inside the equipment after filtration, avoiding polluting the working environment. The upper end of the filtration bin 1 is connected to a mixing bin 2. The filtration bin 1 and the mixing bin 2 are fixedly connected. One side of the mixing bin 2 is connected to a discharge pipe 5. The discharge pipe 5 is connected to the lower side of the mixing bin 2. The filtered seedling-raising water can be taken out through the discharge pipe 5. A filter screen 31 is connected inside the filtration bin 1. The filter screen 31 needs to adopt a pore size that meets the filtration of large-particle impurities in the seedling-raising water. When filtering, the impurities remain on the filter screen 31, while the seedling-raising water enters the filtration bin 1 through the filter screen 31. A partition plate 23 is connected inside the mixing bin 2. A blanking port 24 is opened on the partition plate 23. There are multiple blanking ports 24, and the multiple blanking ports 24 are evenly opened on the partition plate 23. A connecting frame 25 is arranged above the partition plate 23. The lower end of the connecting frame 25 is connected to a cover plate 26. The cover plate 26 corresponds to the blanking port 24 one by one. When the cover plate 26 falls and docks with the blanking port 24, the blanking port 24 can be closed to prevent the seedling-raising water from entering the filtration bin 1. The upper end of the connecting frame 25 is connected to a lifting frame 17. One end of the lifting frame 17 is rotatably connected to a roller 18. A motor 19 is connected to the filtration bin 1. The output end of the motor 19 is connected to a cam 7. The outer side of the cam 7 is in rolling contact with the roller 18. By setting the roller 18 structure, the wear of the structure when the cam 7 supports the lifting frame 17 for height lifting is reduced. A side port 21 is opened on one side of the filtration bin 1. A support frame 3 is arranged on one side of the side port 21. The upper end of the support frame 3 is connected to a limit plate 4 through a fixing block 20. There are two limit plates 4. A connecting column 33 is connected between the limit plates 4. A brushing mechanism for brushing the upper surface of the filter screen 31 is connected between the limit plates 4.

[0033] Specifically, as Figure 5 shown, a deflecting rod 29 is fixedly connected inside the mixing bin 2. There are multiple deflecting rods 29, and the multiple deflecting rods 29 are symmetrically connected to the inner wall of the mixing bin 2. A guiding plate 30 is connected to the deflecting rod 29. The guiding plate 30 is arranged below the partition plate 23. By setting the guiding plate 30, the seedling-raising water flowing out of the blanking port 24 can be separated into multiple strands, and then filtered on the filter screen 31, ensuring that cobalt sulfate is evenly filtered on the filter screen 31, avoiding the single-position filtration of the seedling-raising water on the filter screen 31, resulting in serious blockage of the filter holes at the corresponding position on the filter screen 31 and increasing the subsequent filtration burden of the filter screen 31.

[0034] Specifically, as Figure 5As shown, there are multiple deflection rods 29 and guide plates 30. The multiple guide plates 30 are symmetrically arranged in an inverted V shape in the mixing bin 2. The guide plates 30 arranged in an inverted V shape cause the seedling-growing water to collide with each other after being guided, improving the mixing effect of the seedling-growing water and making the seedling-growing water evenly mixed before continuing to be filtered. At the same time, the structure of the guide plate 30 can be adjusted in angle when the deflection rod 29 rotates, and the structure has adjustability.

[0035] Specifically, as Figure 5 shown, a slider 28 is connected to the outside of the connecting frame 25, and a side chute 22 is opened on the inner wall of the mixing bin 2. One end of the slider 28 is slidably connected to the side chute 22. By setting the structure in which the slider 28 and the side chute 22 cooperate with each other, the structure of the connecting frame 25 is kept stable when moving up and down. The slider 28 adopts a structure in which one end is slidably connected to the side chute 22, so that the connecting frame 25 remains horizontal when moving up and down and does not tilt.

[0036] Specifically, as Figure 5 shown, a return spring 27 is connected to the connecting frame 25, and a spring plate 16 is connected to the mixing bin 2. The upper end of the return spring 27 is connected to the lower end of the spring plate 16. By setting the structure of the return spring 27, when the connecting frame 25 moves down, the downward movement is completed. To avoid relying solely on gravity, the operation of the cover plate 26 sealing the blanking port 24 cannot be quickly completed, and in the liquid medium of the seedling-growing water, there is a certain resistance when the connecting frame 25 moves down. Therefore, by setting the return spring 27, the stability of the structure of the cover plate 26 sealing the blanking port 24 is improved.

[0037] Specifically, as Figure 7 shown, the brushing mechanism includes a cleaning plate 12, and a brush hair 32 is connected to the lower end of the cleaning plate 12. The brush hair 32 is relied on to disturb the impurities remaining on the filter screen 31 during filtration, facilitating subsequent cleaning of the filter screen 31. A sliding rod one 10 and a sliding rod two 11 are connected to the cleaning plate 12. The sliding rod one 10 and the sliding rod two 11 are arranged at one end of the cleaning plate 12 away from the brush hair 32, and the sliding rod one 10 is arranged on the right side of the sliding rod two 11. An L-shaped groove 14 is opened on the limiting plate 4. Both the sliding rod one 10 and the sliding rod two 11 are slidably connected to the L-shaped groove 14, and a driving part for driving the sliding rod one 10 to slide on the L-shaped groove 14 is connected to the sliding rod one 10.

[0038] Specifically, as Figure 6 and Figure 7 shown, a connecting seat 13 is connected between the limiting plate 4 and the filter bin 1, and a placement plate 15 is clamped on the connecting seat 13. By setting the placement plate 15, when the cleaning plate 12 moves, the brush hair 32 connected to the cleaning plate 12 can be cleaned, avoiding the problem that impurities adhere to the brush hair 32 and causing repeated pollution of the filter screen 31. The placement plate 15 is arranged directly below the cleaning plate 12.

[0039] Specifically, as Figure 5 shown, the driving member includes a traction frame 9. One end of the traction frame 9 is rotatably connected to one end of the first sliding rod 10. A turntable 6 is connected to the outside of the cam 7. A traction shaft 8 is non-axisymmetrically connected to the outside of the turntable 6. The other end of the traction frame 9 is rotatably connected to the traction shaft 8. Relying on the eccentrically arranged traction shaft 8 to pull the traction frame 9 to move reciprocally, the operation of the traction frame 9 is synchronized with the rotation of the cam 7, so that the filtration and cleaning only need to be controlled by a single driving structure, ensuring the stability of the operation while also ensuring that the alternating operation between the two processes can be carried out in an orderly manner.

[0040] In summary, for a seedling-raising pool purification device and method provided by this embodiment, when filtering and purifying the water quality of the seedling-raising water, first add the to-be-treated seedling-raising water from the feeding pipe 35 into the mixing chamber 2, and it is necessary to ensure that the added amount does not overflow the mixing chamber 2. Subsequently, start the motor 19, and use the motor 19 to drive the cam 7 and the turntable 6 to rotate synchronously at a low speed.

[0041] When the cam 7 rotates, use the cam 7 to abut against the roller 18 structure arranged above it, so that the roller 18 can move up and down reciprocally. When the height of the roller 18 rises, the jacking frame 17 drives the connecting frame 25 to rise in height, and uses the connecting frame 25 to drive the cover plate 26 and the feeding port 24 to separate from each other. At this time, the seedling-raising water in the mixing chamber 2 enters the filtering chamber 1 through the feeding port 24. At this time, the reset spring 27 structure is compressed. As the cam 7 continues to rotate, the height of the roller 18 structure drops, and the reset spring 27 is used to quickly lower the cover plate 26 structure, thereby completing the rapid closing of the feeding port 24. At this time, the seedling-raising water will pause from entering the filtering chamber 1;

[0042] When the seedling-raising water enters the filtering chamber 1 through the feeding port 24, the seedling-raising water contacts the guide plate 30 structure. The guide plate 30 has the function of guiding the flow direction of the seedling-raising water. The guided seedling-raising waters contact each other, further improving the mixing effect of the seedling-raising water, and at the same time preventing the seedling-raising water from being discharged from the side port 21, playing a good role in guiding the flow direction of the seedling-raising water. Moreover, the seedling-raising water is separated by multiple groups of guide plates 30, avoiding the problem of single-position filtration on the filter screen 31 and improving the uniformity of the seedling-raising water filtration. The inclination angle of the guide plate 30 can be set by rotating the deflection rod 29, making the structure adjustable at this place.

[0043] When the turntable 6 rotates, the traction frame 9 can be pulled by the traction shaft 8 on the turntable 6 to move, and the traction frame 9 is used to pull the sliding rod 10 to slide on the L-shaped groove 14. Since the sliding rod 10 and the sliding rod 2 11 are fixedly connected to the cleaning plate 12, when the sliding rod 10 moves, the sliding rod 2 11 also moves synchronously. When the sliding rod 10 moves to the leftmost end, the sliding rod 2 11 slides to the vertical part of the L-shaped groove 14. At this time, the sliding rod 2 11 is set directly above the sliding rod 10. At this time, the cleaning plate 12 is in a vertical state. When the equipment stops, it is necessary to ensure that the cleaning plate 12 is in a vertical state. The operator can manually rotate the turntable 6 structure to make the cleaning plate 12 move to this state, and then clean the bristles with clean water. 32 structure, the cleaning plate 12 in the vertical state can drain the bristles 32 well, and can ensure that the bristles 32 drain water quickly to prevent the seedling water from corroding the bristles 32. In this state, when the sliding rod 10 moves horizontally to the right, the cleaning plate 12 flips to a horizontal state and moves from the side port 21 to the filter bin 1. The bristles 32 can be used to clean the upper surface of the filter screen 31, thereby disturbing the impurities on the filter screen 31 and preventing the impurities from repeatedly accumulating on the filter screen 31. Brushing the filter screen 31 back and forth will also bring out a certain amount of impurities through the bristles 32. The placement plate 15 arranged on one side of the side port 21 can move the bristles 32 for cleaning, so that the impurities and the bristles 32 are separated from each other, which has the effect of cleaning the bristles 32 to a certain extent.

[0044] The seedling water discharge and purification operation and the cleaning of the filter 31 are performed alternately. This operation requires ensuring that the lifting angle range of the cam 7 and the connection position of the traction shaft 8 are independent of each other, that is, after the discharge, filtering and purification are completed, the cleaning plate 12 will enter the filter bin 1 to clean the filter 31. At this time, the seedling water content on the high-efficiency filtered filter 31 is relatively small, and part of the seedling water can quickly pass through the filter 31 to complete the cleaning, and only a certain amount of impurities remains on the filter 31. Therefore, the seedling water content adhering to the bristles 32 after cleaning is very small, and more of the cleaning is the large particles of impurities carried, so that only a small amount of seedling water is brought out when the bristles 32 are removed later.

[0045] The filtered seedling water will be stored in the filter bin 1, and then the impurities retained inside can be cleaned by disassembling the shell 34. When it is necessary to collect the purified seedling water, the seedling water can be taken out from the discharge pipe 5. The seedling water filtering and purification device can ensure the quality of the seedling water and reduce the content of large particle impurities.

[0046] The foregoing description of the embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A seedling pond purification device, comprising a filter chamber (1) and a housing (34), characterized in that: The shell (34) is connected to a discharge pipe (35), the upper end of the filter bin (1) is connected to a mixing bin (2), one side of the mixing bin (2) is connected to a discharge pipe (5), the filter bin (1) is connected to a filter screen (31), the mixing bin (2) is connected to a partition (23), a discharge port (24) is provided on the partition (23), a connecting frame (25) is provided above the partition (23), a cover plate (26) is connected to the lower end of the connecting frame (25), the cover plate (26) and the discharge port (24) correspond one to one, the upper end of the connecting frame (25) is connected to a lifting frame (17), and the One end of the lifting frame (17) is rotatably connected to a roller (18), the filter bin (1) is connected to a motor (19), the output end of the motor (19) is connected to a cam (7), the outer side of the cam (7) is in rolling contact with the roller (18), one side of the filter bin (1) is provided with a side opening (21), one side of the side opening (21) is provided with a support frame (3), the upper end of the support frame (3) is connected to a limit plate (4) through a fixing block (20), the limit plates (4) are connected with a connecting column (33), and the limit plates (4) are connected with a brushing mechanism for brushing the upper surface of the filter screen (31); The brushing mechanism comprises a cleaning plate (12), the lower end of which is connected to bristles (32), the cleaning plate (12) being connected to a sliding rod (10) and a sliding rod (11), the limiting plate (4) being provided with an L-shaped groove (14), the sliding rod (10) and the sliding rod (11) being slidably connected to the L-shaped groove (14), and the sliding rod (10) being connected to a driving member for driving the sliding rod (10) to slide on the L-shaped groove (14); A connecting seat (13) is connected between the limiting plate (4) and the filter bin (1), a placement plate (15) is clamped on the connecting seat (13), and the placement plate (15) is arranged directly below the cleaning plate (12), and the placement plate (15) can move the bristles (32) for cleaning; The driving member comprises a traction frame (9), one end of the traction frame (9) is rotatably connected to one end of a sliding rod (10), a rotating disk (6) is connected to the outside of the cam (7), a traction shaft (8) is non-axially connected to the outside of the rotating disk (6), and the other end of the traction frame (9) is rotatably connected to the traction shaft (8).

2. A seedling pond purification device according to claim 1, characterized in that: A deflection rod (29) is fixedly connected inside the mixing bin (2), a guide plate (30) is connected to the deflection rod (29), and the guide plate (30) is arranged below the partition plate (23).

3. A seedling pond purification device according to claim 2, characterized in that: A plurality of the deflection rods (29) and guide plates (30) are provided, and the plurality of guide plates (30) are symmetrically arranged in an inverted eight shape in the mixing bin (2).

4. A seedling pond purification device according to claim 1, characterized in that: The outer side of the connecting frame (25) is connected to a sliding block (28), the inner wall of the mixing bin (2) is provided with a side sliding groove (22), and one end of the sliding block (28) is slidably connected to the side sliding groove (22).

5. A seedling pond purification device according to claim 1, characterized in that: The connecting frame (25) is connected to a return spring (27), the mixing chamber (2) is connected to a spring plate (16), and the upper end of the return spring (27) is connected to the lower end of the spring plate (16).

6. A method for purifying a seedling pool, using a seedling pool purification device according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1: introducing seedling water into the mixing chamber (2), starting the motor (19), driving the cam (7) to rotate, so that the seedling water intermittently enters the filtering chamber (1) through the filter screen (31); S2: The synchronously rotating turntable (6) cooperates with the traction shaft (8) to pull the sliding rod (10) to slide on the L-shaped groove (14), so that after the filter (31) filters and purifies the seedling water, the cleaning plate (12) can enter the top of the filter (31) to clean the impurities attached thereto. After the cleaning is completed, the seedling water continues to be discharged, and the filtration and purification of the seedling water continues. The purification and cleaning operations are performed alternately until the seedling water in the mixing chamber (2) is filtered and purified.

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