Agricultural non-point source pollution treatment device and method

Abstract

The invention relates to the technical field of water treatment, and particularly discloses an agricultural non-point source pollution treatment device which comprises a treatment box installed on the downstream of a ditch, a filtering device is arranged in the treatment box, the filtering device in the treatment box is provided with an upper filtering plate and a lower filtering plate from top to bottom, and a plurality of scraping plates are arranged above the upper filtering plate. A plurality of scraping plates are fixed together through a main shaft, when the main shaft rotates, the scraping plates can be driven to scrape on the upper filter plate and scrape solid impurities on the upper filter plate, a cleaning plate is arranged below the upper filter plate, and an extrusion structure is connected between the main shaft and the bottom of the cleaning plate. The main shaft rotates and drives the scraping plate to scrape solid impurities on the surface of the filter plate, and the cleaning plate is linked to move up and down to drive the cleaning needle to pierce and dredge the filter holes.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment, and in particular to a device and method for treating agricultural non-point source pollution. Background Art

[0002] Agricultural non-point source pollution control devices are facilities that use physical, chemical or biological means to intercept, degrade or recycle pollutants to address water and soil pollution problems caused by dispersed pollution sources such as fertilizers, pesticides, and livestock and poultry breeding waste in agricultural production. These devices usually adopt a multi-stage treatment process, for example: 1) physical filtration layer (such as gravel and fine sand to filter large particles of impurities); 2) chemical treatment layer (such as using electrode plates to remove heavy metal ions); 3) biological treatment layer (such as algae and anaerobic bacteria to degrade nitrogen and phosphorus pollutants); 4) ecological interception structure (such as grass frames and drainage channels to slow down water flow and intercept sediment). Some devices also combine solar power generation or transform abandoned wells to form an aeration system to achieve energy conservation and resource recycling. Their core goal is to reduce the migration of pollutants into the environment while taking into account soil and water conservation and sustainable agricultural development.

[0003] For example, the prior art publication number CN116854220A discloses an agricultural non-point source pollution control device and method, which includes a sedimentation tank, a driving assembly is provided at the top of the sedimentation tank, a movable plate is connected to the driving assembly for transmission, and a plurality of flocculation cylinders are fixedly connected to the movable plate; a plurality of spreading cylinders, the spreading cylinders are arranged below the flocculation cylinders and are connected to the flocculation cylinders, a shaft is connected for rotation in the spreading cylinders, and a spreading plate is fixedly connected to the shaft; a plurality of first protrusions, the plurality of first protrusions are fixedly connected to the inner wall of the sedimentation tank at equal intervals and are parallel to the moving direction of the movable plate, a second protrusion is detachably connected between the plurality of first protrusions, a reciprocating assembly is fixedly connected to the end of the second protrusion away from the first protrusion, and the reciprocating assembly is transmission-connected to the plurality of shafts. The present invention liberates manual labor and improves the uniformity of the input of flocculant in the sedimentation tank, thereby improving the sewage treatment effect.

[0004] In existing agricultural non-point source pollution control devices, filter plates (especially the upper filter plate) are prone to clogging due to the accumulation of solid impurities and lack an efficient automatic cleaning mechanism. Traditional methods may rely on manual flushing or downtime for cleaning, resulting in high maintenance costs and low efficiency, affecting continuous operation. Traditional filter devices have a weak effect on water flow and are unable to effectively break up flocculants or fine solid condensates (such as fertilizer particles and organic matter clumps) in the water, resulting in reduced subsequent filtration efficiency and increased strain on the filter plates. Summary of the Invention

[0005] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0006] The present invention provides an agricultural non-point source pollution control device and method, which can solve the problems of the prior art. The specific solution is as follows:

[0007] On the one hand, the present invention provides an agricultural non-point source pollution control device, comprising a treatment box installed downstream of a ditch, a filtering device provided inside the treatment box, an upper filter plate and a lower filter plate provided on the filtering device inside the treatment box from top to bottom, a plurality of scrapers provided above the upper filter plate, the plurality of scrapers being fixed together by a main shaft, and when the main shaft rotates, the scrapers can be driven to scrape the upper filter plate to scrape off solid impurities on the upper filter plate, a cleaning plate is provided below the upper filter plate, an extrusion structure is connected between the main shaft and the bottom of the cleaning plate, and when the main shaft rotates, the cleaning plate can be driven to move up and down, a plurality of cleaning needles are provided on the cleaning plate, the cleaning needles corresponding to the filter holes on the upper filter plate, and when the cleaning plate moves up and down, the cleaning needles are driven to clean the filter holes on the upper filter plate;

[0008] In the above scheme, the main shaft rotates and drives the scraper to scrape off the solid impurities on the surface of the filter plate, and the cleaning plate moves up and down in conjunction with the cleaning needle to pierce and clear the filter holes. This cleaning scheme can effectively prevent the filter holes from being blocked and the filter plate surface from being contaminated, thereby ensuring the filtration efficiency and water flow, and significantly improving the system's continuous operation capability and maintenance convenience.

[0009] Preferably, a cleaning port is provided on the side of the processing box, and a sealing door is provided in the cleaning port. The sealing door is movably connected to the cleaning port and can seal the cleaning port when the sealing door is closed.

[0010] Preferably, a guide groove is provided between the ditch and the processing box, and a primary filter device is provided in the guide groove. The primary filter device is used to perform preliminary filtering of impurities. A discharge port is provided on the side wall of the guide groove of the primary filter device. When the primary filter device is in the initial position, the discharge port is blocked. Whenever the primary filter device rotates ninety degrees, the discharge port switches between an open state and a closed state. When the discharge port is opened, large particles of impurities collected by the primary filter device are discharged. When the discharge port is closed, the liquid flows normally from the guide groove.

[0011] Preferably, a plurality of spoilers are provided between the upper filter plate and the lower filter plate, and the spoilers are evenly distributed around the main shaft. A rotating shaft is provided in the middle of the spoiler, and the central axis of the rotating shaft is perpendicular to the vertical main shaft.

[0012] Preferably, a bottom plate is provided between the lower filter plate and the upper filter plate, a plurality of flow ports are provided around the bottom plate, a vibration plate is provided above the lower filter plate, a plurality of vibration grooves are provided at the bottom of the bottom plate, the vibration grooves are evenly distributed in a circle at the bottom of the bottom plate, the top end of the vibration plate is inserted into at least a portion of the vibration groove, and the vibration plate is made of elastic material.

[0013] Preferably, the middle portion of the lower filter plate is fixedly connected to the bottom end of the main shaft, so that the lower filter plate can rotate synchronously with the main shaft. When the lower filter plate rotates, the vibrating plate on the top thereof vibrates under the embedding and separation action of the plurality of vibrating grooves, thereby shaking off the screened material on the lower filter plate.

[0014] In the above scheme, by allowing the lower filter plate to rotate with the main shaft, an elastic vibration plate is set on its top, and the upper end of the vibration plate is embedded in the vibration groove evenly distributed on the bottom of the fixed base plate. When the lower filter plate rotates, the vibration plate repeatedly embeds and disengages from the vibration groove, generating continuous vibration. This vibration effectively shakes off or loosens the fine sieve matter retained on the surface of the lower filter plate, prevents the mud cake on the plate surface from hardening and clogging the filter holes, and maintains the air permeability of the filter plate.

[0015] Preferably, the extrusion structure includes a fixed sleeve, which is fixedly connected to the outer wall of the main shaft, and an extrusion block is arranged around the fixed sleeve. The bottom of the cleaning plate is fixedly connected to an extrusion ring, and the extrusion ring is arranged in a circumferential wave. Therefore, when the fixed sleeve rotates with the main shaft, under the extrusion action of the extrusion block, it can drive the extrusion ring to move up and down, thereby allowing the cleaning plate to move up and down, and then allowing the cleaning needle on the cleaning plate to move up and down to clean the filter holes on the upper filter plate.

[0016] Preferably, the lower half of the main shaft is fixedly connected with a driving gear, a driven gear is provided on one side of the driving gear, a gear ring is provided on the outside of the driven gear, the driving gear is meshed with the driven gear, the driven gear is meshed with the gear ring, the rotating shaft is rotatably installed around the gear ring, one end of the rotating shaft close to the inner wall of the processing box is also connected with a meshing ball, the inner wall of the processing box is fixedly connected with an annular plate, a full circle of meshing grooves is provided on the annular plate, the meshing ball is meshed with the meshing groove, and when the rotating shaft revolves under the drive of the gear ring, due to the meshing action of the meshing ball and the meshing groove, the rotating shaft and the spoiler can rotate. When the spoiler rotates, water falling from above hits the spoiler;

[0017] In the above scheme, the spoiler is driven by the main shaft and revolves around a fixed center through gear transmission. At the same time, the meshing ball at the end of its rotating shaft cooperates with the meshing groove on the fixed inner wall, forcing the spoiler to rotate. When the water flows down, it hits the rotating and revolving spoiler, which can forcefully break up the flocculants or fine condensates that may exist in the water, making them easier to be captured by subsequent filter plates, thereby improving the overall purification efficiency.

[0018] Preferably, the primary filtration device includes a plurality of baffles, one end of which is gathered together to form a whole, the bottom ends of which are rotatably connected to the bottom of the guide groove, a plurality of strip holes are provided on the sides of which, both ends of which are fixedly connected to arc plates, the bottoms of which are fixedly connected to a base, slots are provided at both ends of the base, and the two slots and the two arc plates are spaced apart.

[0019] A method for controlling agricultural non-point source pollution comprises the following steps:

[0020] S1. Water filtration: The polluted water flows through the upper and lower filter plates arranged from top to bottom in the treatment box to intercept solid impurities;

[0021] S2. Scrape off surface impurities: Drive the main shaft to rotate, driving multiple scrapers fixed on the main shaft to rotate, and use the scrapers to scrape the upper surface of the upper filter plate to remove accumulated solid impurities;

[0022] S3. Synchronous cleaning of filter holes: While the main shaft rotates, the extrusion structure connecting the main shaft and the bottom of the cleaning plate converts the rotational motion of the main shaft into vertical reciprocating motion of the cleaning plate;

[0023] S4. Penetrate the filter holes: Use multiple cleaning needles set on the cleaning plate. During the up and down movement of the cleaning plate, repeatedly insert the cleaning needles into the corresponding filter holes of the upper filter plate to peel off and remove the residues blocking the filter holes.

[0024] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0025] 1. The present invention drives the scraper to scrape off solid impurities on the surface of the filter plate by rotating the main shaft, and drives the cleaning plate to move up and down to drive the cleaning needle to pierce and clear the filter holes. This cleaning solution can effectively prevent the filter holes from being blocked and the filter plate surface from being contaminated, thereby ensuring the filtration efficiency and water flow, and significantly improving the system's continuous operation capability and maintenance convenience.

[0026] 2. The primary filtration device in the guide trough of the present invention adopts a rotatable baffle structure. It only needs to rotate the baffle assembly to a specific angle, and its bottom notch will be aligned with the side wall discharge port, so that the blocked large particles of agricultural waste (such as pesticide packaging) will automatically fall and be discharged. After resetting, the notch is dislocated and the discharge port is closed to restore normal flow and filtration. This design simplifies the garbage cleaning operation and reduces the frequency of manual intervention.

[0027] 3. Driven by the main shaft, the spoiler of the present invention revolves around a fixed center through gear transmission. At the same time, the meshing ball at the end of the rotating shaft cooperates with the meshing groove on the fixed inner wall, forcing the spoiler to rotate. When the water flows down, it hits the rotating and revolving spoiler, which can strongly break up the flocculent clumps or fine condensates that may exist in the water, making them easier to be captured by the subsequent filter plates, thereby improving the overall purification efficiency.

[0028] 4. The present invention allows the lower filter plate to rotate with the main shaft, and an elastic vibration plate is set on the top of the lower filter plate. The upper end of the vibration plate is embedded in the vibration groove evenly distributed on the bottom of the fixed base plate. When the lower filter plate rotates, the vibration plate repeatedly embeds and disengages from the vibration groove, generating continuous vibration. This vibration effectively shakes off or loosens the fine sieve material retained on the surface of the lower filter plate, prevents the mud cake on the plate surface from hardening and clogging the filter holes, and maintains the air permeability of the filter plate.

[0029] 5. The present invention fixes the cleaning needle on the cleaning plate, and the cleaning plate cooperates with the extrusion block on the main shaft through the wavy extrusion ring at the bottom. When the main shaft rotates, the extrusion block periodically squeezes the undulating side wall of the extrusion ring, driving the extrusion ring and the cleaning plate connected thereto to perform stable up and down reciprocating motion. This mechanical structure has reliable conversion, drives the cleaning needle to perform vertical dredging action, and effectively removes the blockage in the filter pore.

[0030] Other features and advantages of the present invention will be described in the following description, and part of them will become obvious from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0032] Figure 1 It is an overall three-dimensional diagram of the present invention;

[0033] Figure 2 is a cross-sectional view of a processing box of the present invention;

[0034] Figure 3 A perspective view of a cleaning plate according to the present invention;

[0035] Figure 4 This is a structural diagram of the sealing door of the present invention;

[0036] Figure 5 is a perspective view of the primary filtration device of the present invention;

[0037] Figure 6 A perspective view of a spoiler according to the present invention;

[0038] Figure 7 A perspective view of a spoiler and a gear ring according to the present invention;

[0039] Figure 8This is a cross-sectional view of the other side of the processing box of the present invention;

[0040] Figure 9 is a three-dimensional diagram of the vibrating plate of the present invention;

[0041] Figure 10 It is a structural schematic diagram of the vibration trough of the present invention;

[0042] Figure 11 It is a three-dimensional diagram of the extruded structure of the present invention.

[0043] The accompanying drawings are numerals as follows:

[0044] 1. Ditch; 2. Processing box; 3. Upper filter plate; 4. Lower filter plate; 5. Scraper; 6. Main shaft; 7. Cleaning plate; 8. Cleaning needle; 9. Filter hole; 10. Drain outlet; 11. Cleaning port; 12. Sealing door; 13. Connecting ear; 14. Telescopic part; 15. Guide groove; 16. Discharge port; 17. Baffle; 18. Strip hole; 19. Arc plate; 20. Base; 21. Notch; 22. Spoiler; 23. Rotating shaft; 24. Driving gear; 25. Driven gear; 26. Gear ring; 27. Meshing ball; 28. Ring plate; 29. ​​Meshing groove; 30. Rotating sleeve; 31. Bottom plate; 32. Flow port; 33. Vibrating plate; 34. Vibrating groove; 35. Fixed sleeve; 36. Extrusion block; 37. Extrusion ring. DETAILED DESCRIPTION

[0045] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used to explain the principles of the present invention together with the embodiments of the present invention.

[0046] Example 1: Figure 1 、 Figure 2 、 Figure 3 As shown, this embodiment provides an agricultural non-point source pollution control device, including a treatment box 2 installed downstream of a ditch 1. The treatment box 2 is provided with a filter device inside. The filter device inside the treatment box 2 is respectively provided with an upper filter plate 3 and a lower filter plate 4 from top to bottom. A plurality of scrapers 5 are provided above the upper filter plate 3. The plurality of scrapers 5 are fixed together by a main shaft 6. When the main shaft 6 rotates, the scrapers 5 can be driven to scrape the upper filter plate 3 to remove solid impurities on the upper filter plate 3. A cleaning plate 7 is provided below the upper filter plate 3. An extrusion structure is connected between the main shaft 6 and the bottom of the cleaning plate 7. When the main shaft 6 rotates, it can drive the cleaning plate 7 to move up and down. The cleaning plate 7 is provided with a plurality of cleaning needles 8. The cleaning needles 8 correspond to the filter holes 9 on the upper filter plate 3. When the cleaning plate 7 moves up and down, the cleaning needles 8 are driven to clean the filter holes 9 on the upper filter plate 3.

[0047] like Figure 3As shown, in order to allow water to flow normally into the bottom of the treatment box 2 after passing through the upper filter plate 3 and to avoid the cleaning plate 7 blocking the water flow, a number of drain ports 10 are also opened on the cleaning plate 7. The diameter of the drain port 10 is significantly larger than the diameter of the filter hole 9, so that the drainage rate is greater than the filtration speed of the upper filter plate 3.

[0048] As a possible embodiment, Figure 4 As shown, a cleaning port 11 is provided on the side of the processing box 2, and a sealing door 12 is provided in the cleaning port 11. The sealing door 12 is movably connected to the cleaning port 11. When the sealing door 12 is closed, the cleaning port 11 can be sealed. A connecting ear 13 is fixedly connected to the top of the sealing door 12. A telescopic part 14 is fixedly connected to the side of the connecting ear 13 close to the processing box 2. The other end of the telescopic part 14 is fixedly connected to the outer wall of the processing box 2. The telescopic part 14 can be an electric telescopic rod, which can drive the sealing door 12 to move horizontally through the telescopic part 14, thereby blocking the cleaning port 11.

[0049] In the above scheme, when it is necessary to clean the impurities on the upper filter plate 3, the water flow is stopped through the valve upstream of the ditch 1, and then the sealing door 12 is moved by the telescopic member 14 to open the sealing door 12, so as to facilitate the workers to clean the inside of the processing box 2 (upper filter plate 3). When the cleaning is completed, the sealing door 12 is moved by the telescopic member 14 to close the sealing door 12, so that the cleaning port 11 is blocked, and then the valve upstream of the ditch 1 is opened to allow the water to flow normally again.

[0050] like Figure 1 As shown, a guide groove 15 is provided between the ditch 1 and the processing box 2, and a primary filter device is provided in the guide groove 15. The primary filter device is used to perform preliminary filtering of impurities. A discharge port 16 is provided on the side wall of the guide groove 15 on the side of the primary filter device. When the primary filter device is in the initial position, the discharge port 16 is blocked. Whenever the primary filter device rotates ninety degrees, the discharge port 16 switches between an open state and a closed state. When the discharge port 16 is opened, large particles of impurities collected by the primary filter device are discharged. When the discharge port 16 is closed, the liquid flows normally from the guide groove 15.

[0051] like Figure 5As shown, the primary filter device includes a plurality of baffles 17, one end of the plurality of baffles 17 is gathered together to form a whole, the bottom ends of the plurality of baffles 17 are rotatably connected to the bottom of the guide groove 15, the sides of the plurality of baffles 17 are provided with a plurality of strip holes 18, and the plurality of strip holes 18 form a filtering area, thereby being able to block agricultural waste (including but not limited to pesticide bottles, pesticide bags and other waste), the two ends of the plurality of baffles 17 are fixedly connected to an arc plate 19, and the bottoms of the plurality of baffles 17 are fixedly connected to a base 20 , notches 21 are provided at both ends of the base 20, and the two notches 21 and the two curved plates 19 are arranged at intervals, so that when the curved plates 19 correspond to the discharge port 16, water flows normally and will not leak from the discharge port 16. When the filtered garbage needs to be discharged, the baffle 17 is driven by an external driving source to rotate ninety degrees so that the notches 21 correspond to the position of the discharge port 16, thereby allowing the garbage to fall naturally. After discharge, the baffle 17 is driven by the driving source to continue to rotate ninety degrees, allowing the water to flow normally in the guide groove 15.

[0052] like Figure 6 、 Figure 7 As shown, a plurality of spoilers 22 are arranged between the upper filter plate 3 and the lower filter plate 4. The spoilers 22 are evenly distributed around the main shaft 6. A rotating shaft 23 is arranged in the middle of the spoiler 22. The central axis of the rotating shaft 23 is perpendicular to the central axis of the main shaft 6.

[0053] The lower half of the main shaft 6 is fixedly connected to a driving gear 24, and a driven gear 25 is provided on one side of the driving gear 24. A gear ring 26 is provided on the outside of the driven gear 25. The driving gear 24 meshes with the driven gear 25, and the driven gear 25 meshes with the gear ring 26. The rotating shaft 23 is rotatably installed around the gear ring 26. The end of the rotating shaft 23 close to the inner wall of the processing box 2 is also connected with a meshing ball 27. The inner wall of the processing box 2 is fixedly connected to an annular plate 28. The annular plate 28 is provided with a full circle of meshing grooves 29. The meshing balls 27 mesh with the meshing grooves 29, and when the rotating shaft 23 revolves under the drive of the gear ring 26, due to the meshing action of the meshing balls 27 and the meshing grooves 29, the rotating shaft 23 and the spoiler 22 can rotate. When the spoiler 22 rotates, water falling from above can hit the spoiler 22, so that the solid condensed matter in the water can be knocked away, thereby facilitating subsequent further filtration work.

[0054] It should be noted that a plurality of rotating sleeves 30 are fixedly connected to the periphery of the gear ring 26 , and one end of the rotating shaft 23 away from the meshing ball 27 is rotatably connected to the rotating sleeve 30 .

[0055] like Figure 8 、 Figure 9 、 Figure 10As shown, a bottom plate 31 is further provided between the lower filter plate 3 and the upper filter plate 4. The bottom of the gear ring 26 is rotatably connected to the top of the bottom plate 31 through a bearing. The bottom of the driven gear 25 is rotatably mounted on the top of the bottom plate 31. A number of flow openings 32 are provided around the bottom plate 31. A vibration plate 33 is provided above the lower filter plate 4. A number of vibration grooves 34 are provided at the bottom of the bottom plate 31. The vibration grooves 34 are evenly distributed on the bottom of the bottom plate 31 in a circle. The top of the vibration plate 33 is inserted into at least a portion of the vibration groove 34. The vibration plate 33 is made of elastic material.

[0056] The middle part of the lower filter plate 4 is fixedly connected to the bottom end of the main shaft 6, so that the lower filter plate 4 can rotate synchronously with the main shaft 6. When the lower filter plate 4 rotates, the vibration plate 33 on its top vibrates under the embedding and separation action of several vibration grooves 34, so that the screened material of the lower filter plate 4 is shaken away.

[0057] like Figure 11 As shown, the extrusion structure includes a fixed sleeve 35, which is fixedly connected to the outer wall of the main shaft 6. An extrusion block 36 is arranged around the fixed sleeve 35, and an extrusion ring 37 is fixedly connected to the bottom of the cleaning plate 7. The extrusion ring 37 is arranged in a circumferential wave direction. Therefore, when the fixed sleeve 35 rotates with the main shaft 6, under the extrusion action of the extrusion block 36, the extrusion ring 37 can be driven to move up and down in a circular motion, thereby allowing the cleaning plate 7 to move up and down, and then allowing the cleaning needle 8 on the cleaning plate 7 to move up and down to clean the filter holes 9 on the upper filter plate 3 to prevent the filter holes 9 from being blocked.

[0058] Example 2: This example differs from Example 1 in that it provides a method for controlling agricultural non-point source pollution, comprising the following steps:

[0059] S1. Preliminary filtration stage: Contaminated agricultural drainage first flows into ditch 1. Before entering treatment box 2, it flows through diversion trough 15. In diversion trough 15, the water flows through the primary filtration device composed of multiple baffles 17. The strip holes 18 on the side of the baffles 17 allow water to pass through, but effectively intercept floating or larger solid impurities such as pesticide bottles and bags.

[0060] S2. Primary filter impurity discharge: When the garbage intercepted by the primary filter device accumulates to a certain level, the external driving source drives the entire primary filter device to rotate about ninety degrees. At this time, the notch 21 on the base 20 is aligned with the discharge port 16 on the side wall of the guide trough 15, and the intercepted larger garbage automatically falls and is discharged. After the slag discharge is completed, the driving source drives the primary filter device back to its original position, the notch 21 is misaligned with the discharge port 16, and the device resumes its filtering function.

[0061] S3. Filtration and cleaning of the upper filter plate:

[0062] S3.1. Filtration: The sewage after primary filtration enters the treatment box 2 and first flows to the upper filter plate 3. The water penetrates downward through the filter holes 9 on the upper filter plate 3, and the solid impurities on its surface are trapped.

[0063] S3.2. Surface cleaning: When the main shaft 6 rotates, it drives several scrapers 5 fixed around it to rotate and scrape the surface of the upper filter plate 3, pushing the accumulated solid impurities to a specific area or preventing them from accumulating on the plate surface.

[0064] S3.2, filter hole cleaning: The rotation of the main shaft 6 is converted into the up and down reciprocating motion of the cleaning plate 7 through the extrusion structure. The cleaning needle 8 fixed on the cleaning plate 7 then pierces and pulls down, accurately passing through and clearing the filter holes 9 of the upper filter plate 3 to prevent blockage.

[0065] S3.3. Drainage guarantee: The large-aperture drain port 10 provided on the cleaning plate 7 ensures that water can flow smoothly even when the cleaning needle moves or the cleaning plate is in a low position. Its water flow capacity is greater than the filtration speed of the upper filter plate 3.

[0066] S4, Water Treatment Disturbance Stage: Water seeping from the upper filter plate 3 falls into the central area of ​​the treatment tank. The main shaft 6 drives the driven gear 25 via the drive gear 24, which in turn drives the external toothed ring 26 to rotate. The ring 26 drives the multiple rotating shafts 23 and spoilers 22 connected to it by a rotating sleeve 30 to revolve around the center of the main shaft 26. At the same time, because the meshing ball 27 at the distal end of each rotating shaft 23 engages with the meshing groove 29 fixed to the annular plate 28 on the inner wall of the treatment tank, the spoilers 22 are forced to rotate about their own rotating shafts 23 as the rotating shafts 23 revolve. This combined motion causes the water flow to violently impact the continuously rotating and moving spoilers 22, breaking up and fragmenting solid clumps in the water, creating conditions for subsequent fine filtration.

[0067] S5, Filtration and anti-blocking of lower filter plate:

[0068] S5.1. Filtration: The disrupted and broken water flows downward through the flow openings 32 provided on the upper filter plate 3 and the disruptive structure bottom plate 31, and reaches the lower filter plate 4. The lower filter plate 4 further intercepts finer pollutant particles.

[0069] S5.2. Vibration Blockage Prevention: The lower filter plate 4 is fixed to the bottom end of the main shaft 6 and rotates with it. Several vibrating plates 33 made of elastic material are installed on the top surface of the lower filter plate 4. The upper ends of these vibrating plates 33 are inserted partially into a set of vibrating grooves 34 distributed circumferentially at the bottom of the upper base plate 31. As the rotating lower filter plate 4 drives the vibrating plates 33 to rotate, the upper ends of the vibrating plates 33 periodically partially sink into or out of the vibrating grooves 34 of the fixed base plate 31, thereby generating continuous high-frequency vibration. This vibration effectively loosens the oversize material retained on the surface of the lower filter plate 4, preventing it from compacting and clogging the filter holes.

[0070] S5.3 Maintenance operation: If too many impurities accumulate on the upper filter plate 3 or manual maintenance is required, the upstream valve of the ditch 1 can be closed to cut off the water flow, and the sealing door 12 can be driven by the telescopic part 14 to move horizontally to open the cleaning port 11 on the side of the treatment box 2, so that workers can enter conveniently or use tools to clean the surface of the upper filter plate 3. After completion, close the sealing door 12 and open the upstream valve to resume system operation.

[0071] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0072] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0073] In the embodiments of the present application, or by implication, the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In the description of the embodiments of the present application, "multiple" means two or more, unless otherwise precisely and specifically specified. The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only the specific embodiments described. Obviously, many modifications and changes can be made based on the contents of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An agricultural non-point source pollution control device, comprising a treatment box installed downstream of a ditch, wherein a filtering device is provided inside the treatment box, characterized in that: The filtering device inside the processing box is respectively provided with an upper filter plate and a lower filter plate from top to bottom. A plurality of scrapers are provided above the upper filter plate, and the plurality of scrapers are fixed together by a main shaft. When the main shaft rotates, it can drive the scrapers to scrape the upper filter plate to scrape off the solid impurities on the upper filter plate. A cleaning plate is provided below the upper filter plate, and an extrusion structure is connected between the main shaft and the bottom of the cleaning plate. When the main shaft rotates, it can drive the cleaning plate to move up and down. A plurality of cleaning needles are provided on the cleaning plate, and the cleaning needles correspond to the filter holes on the upper filter plate. When the cleaning plate moves up and down, it drives the cleaning needles to clean the filter holes on the upper filter plate.

2. The agricultural non-point source pollution control device according to claim 1, characterized in that: A cleaning port is provided on the side of the processing box. A sealing door is provided in the cleaning port. The sealing door is movably connected to the cleaning port and can seal the cleaning port when the sealing door is closed.

3. The agricultural non-point source pollution control device according to claim 1, characterized in that: A guide trough is provided between the ditch and the processing box, and a primary filter device is provided in the guide trough. The primary filter device is used for preliminary filtering of impurities. A discharge port is provided on the side wall of the guide trough on the side of the primary filter device. When the primary filter device is in the initial position, the discharge port is blocked. Whenever the primary filter device is rotated ninety degrees, the discharge port switches between an open state and a closed state. When the discharge port is opened, large particles of impurities collected by the primary filter device are discharged. When the discharge port is closed, the liquid flows normally from the guide trough.

4. The agricultural non-point source pollution control device according to claim 1, characterized in that: A plurality of spoilers are arranged between the upper filter plate and the lower filter plate, and the spoilers are evenly distributed around the main shaft. A rotating shaft is arranged in the middle of the spoiler, and the central axis of the rotating shaft is perpendicular to the vertical main shaft.

5. The agricultural non-point source pollution control device according to claim 1, characterized in that: A bottom plate is also provided between the lower filter plate and the upper filter plate, and a plurality of flow ports are provided around the bottom plate. A vibration plate is provided above the lower filter plate, and a plurality of vibration grooves are provided at the bottom of the bottom plate. The vibration grooves are evenly distributed in a circle at the bottom of the bottom plate, and the top of the vibration plate is inserted into at least a portion of the vibration groove. The vibration plate is made of elastic material.

6. The agricultural non-point source pollution control device according to claim 5, characterized in that: The middle part of the lower filter plate is fixedly connected to the bottom end of the main shaft, so that the lower filter plate can rotate synchronously with the main shaft. When the lower filter plate rotates, the vibration plate on its top vibrates under the embedding and separation action of several vibration grooves, thereby shaking off the screened material on the lower filter plate.

7. The agricultural non-point source pollution control device according to claim 1, characterized in that: The extrusion structure includes a fixed sleeve, which is fixedly connected to the outer wall of the main shaft. An extrusion block is arranged around the fixed sleeve. An extrusion ring is fixedly connected to the bottom of the cleaning plate. The extrusion ring is arranged in a circumferential wave shape. Therefore, when the fixed sleeve rotates with the main shaft, the extrusion block can drive the extrusion ring to move up and down under the extrusion action of the extrusion block, thereby allowing the cleaning plate to move up and down, and then allowing the cleaning needle on the cleaning plate to move up and down to clean the filter holes on the upper filter plate.

8. The agricultural non-point source pollution control device according to claim 1, characterized in that: The lower half of the main shaft is fixedly connected to a driving gear, a driven gear is provided on one side of the driving gear, and a gear ring is provided on the outside of the driven gear. The driving gear is meshed with the driven gear, and the driven gear is meshed with the gear ring. The rotating shaft is rotatably installed around the gear ring, and an engaging ball is also connected to the end of the rotating shaft close to the inner wall of the processing box. The inner wall of the processing box is fixedly connected to an annular plate, and a full circle of engaging grooves is provided on the annular plate. The engaging balls are engaged with the engaging grooves, and when the rotating shaft revolves under the drive of the gear ring, the engaging action of the engaging balls and the engaging grooves enables the rotating shaft and the spoiler to rotate. When the spoiler rotates, water falling from above hits the spoiler.

9. The agricultural non-point source pollution control device according to claim 1, characterized in that: The primary filter device includes several baffles, one end of which is gathered together to form a whole, the bottom ends of which are rotatably connected to the bottom of the guide groove, several strip holes are opened on the sides of the baffles, the two ends of the baffles are fixedly connected to the arc plates, the bottoms of which are fixedly connected to the base, the two ends of the base are opened with slots, and the two slots and the two arc plates are arranged at intervals.

10. A method for controlling agricultural non-point source pollution, characterized in that: The agricultural non-point source pollution control device according to any one of claims 1 to 9 comprises the following steps: S1. Water filtration: The polluted water flows through the upper and lower filter plates arranged from top to bottom in the treatment box to intercept solid impurities; S2. Scrape off surface impurities: Drive the main shaft to rotate, driving multiple scrapers fixed on the main shaft to rotate, and use the scrapers to scrape the upper surface of the upper filter plate to remove accumulated solid impurities; S3. Synchronous cleaning of filter holes: While the main shaft rotates, the extrusion structure connecting the main shaft and the bottom of the cleaning plate converts the rotational motion of the main shaft into vertical reciprocating motion of the cleaning plate; S4. Penetrate the filter holes: Use multiple cleaning needles set on the cleaning plate. During the up and down movement of the cleaning plate, repeatedly insert the cleaning needles into the corresponding filter holes of the upper filter plate to peel off and remove the residues blocking the filter holes.

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