A water purification device for river farmland drainage ecological ditch

Abstract

The present invention relates to the technical field of farmland water conservancy engineering, and in particular to a water purification device for river farmland drainage ecological ditch, including a ditch substrate, etc.; the ditch substrate is a trapezoidal frame and is used to fit and install in the farmland drainage ditch, the water inlet plate is fixedly connected to the front side of the ditch substrate, a plurality of filter holes are arranged in the middle of the water-facing surface of the water inlet plate, the front side of the water inlet plate of the ditch substrate is the water inlet area, partition plates are arranged on both sides of the water inlet area, the ditch substrate and the partition plate are between the impurity collection area, the first baffle is fixedly connected to the middle of the ditch substrate and a connecting pipe is arranged at the bottom. The present invention drives the U-shaped rod by the floating block in the sedimentation area with the rise and fall of the water surface, thereby driving the cleaning frame to move up and down, automatically cleaning the impurities filtered off the water inlet plate, not only reducing the need for manual maintenance, but also preventing the clogging of the filter holes of the water inlet plate, ensuring that the ditch water flows smoothly into the filter assembly for filtration.

Description

Technical Field

[0001] The invention relates to the technical field of farmland water conservancy engineering, and in particular to a water purification device for a river farmland drainage ecological ditch. Background Art

[0002] With the development of modern agriculture, the extensive use of fertilizers and pesticides has become an important means to increase crop yields. However, if these chemicals cannot be completely absorbed by the soil, they will often enter nearby water bodies with surface runoff, leading to problems such as eutrophication of water bodies. In recent years, the global attention to water resource protection and sustainable development has increased, so how to effectively manage agricultural emissions has become an important issue.

[0003] After searching, the patent with the authorization announcement number CN221244138U discloses a debris filtering device for a water channel used in a farmland water conservancy project, including a water channel, two columns are fixedly installed on both sides of the water channel, a longitudinal beam is fixedly installed between the two columns on the same side, a cross beam is fixedly installed between the two longitudinal beams, a screw is penetrated at the bottom of the cross beam, and a filtering device is fixedly installed at the bottom of the screw; the above-mentioned filtering device uses a filtering component to filter larger debris in the water channel, but the filtering device still has certain limitations when used. Specifically, since the filtering component is prone to clogging, when the liftable filtering component is raised from the water channel, it still needs to be frequently cleaned and maintained manually, and frequent manpower investment in rural areas may become a burden, and since farmland needs to use agricultural chemicals such as nitrogen fertilizers, phosphate fertilizers and pesticides, chemical substances that are easily soluble in water (nitrogen, phosphorus and pesticide residues, etc.) are mixed in the drainage ditch, and the filtering device cannot effectively remove such chemical substances. If these soluble pollutants are not controlled, they may still cause pollution to downstream water bodies. Summary of the invention

[0004] Existing debris filtering devices for farmland water channels are prone to clogging and have the disadvantage of requiring frequent manual cleaning and maintenance. In order to overcome the problems of the prior art, the present invention provides a water purification device for river farmland drainage ecological ditches.

[0005] A water purification device for an ecological ditch for draining water from a river farmland comprises a ditch substrate, a water inlet plate, a first baffle plate and a second baffle plate. The ditch substrate is a trapezoidal frame and is used to fit and install in a farmland draining water ditch. The water inlet plate is fixedly connected to the front side of the ditch substrate. A plurality of filter holes are arranged in the middle of the water-facing surface of the water inlet plate. The front side of the water inlet plate of the ditch substrate is a water inlet area. Partition plates are arranged on both sides of the water inlet area. An impurity collection area is provided between the ditch substrate and the partition plate. The first baffle plate is fixedly connected to the middle of the ditch substrate and its bottom The first baffle plate is provided with a connecting pipe, the filtering area is between the water inlet plate and the first baffle plate, the second baffle plate is fixed to the rear side of the ditch substrate and a drainage pipe is provided at the bottom thereof, and the sedimentation area is between the first baffle plate and the second baffle plate; it also includes: a first solenoid valve, which is installed on the connecting pipe at the bottom of the first baffle plate; a second solenoid valve, which is installed on the drainage pipe at the bottom of the second baffle plate, and a filter is provided in the drainage pipe at the bottom of the second baffle plate; a debris cleaning piece, which includes: a U-shaped rod, which is in an inverted U shape and crosses and is slidably connected to the water inlet plate and the first baffle plate. a cleaning frame, mounted at one end of the lower portion of the U-shaped rod, the cleaning frame body slidingly fitting on the filter hole on the front side of the water inlet plate, and the two ends of the cleaning frame slidingly fitting on the partition plates on both sides, the cleaning frame is used to clean the impurities filtered off the water inlet plate; a floating block, mounted at the other end of the lower portion of the U-shaped rod, the floating block is located in the sedimentation area; a filter assembly, arranged in the filter area of ​​the ditch substrate, the filter assembly is used to perform multi-stage filtration on the intercepted ditch water in the filter area, close the first solenoid valve and the second The solenoid valve will gradually fill up the ditch water intercepted in the water inlet area and the filter area, so that the ditch water is filtered by the filter assembly. After the filter area is full, open the first solenoid valve to allow the water in the filter area to flow into the sedimentation area through the connecting pipe. The float rises with the water level in the sedimentation area, so that the U-shaped rod synchronously drives the cleaning frame to rise and clean the impurities filtered on the water inlet plate. After the sedimentation area is full, open the first solenoid valve to drain the water. The float drops with the water level in the sedimentation area to clean the impurities filtered on the water inlet plate again, thereby preventing impurities from clogging the filter holes of the water inlet plate.

[0006] It is further explained that the top of the cleaning frame is a symmetrical inclined surface facing outward and downward, and the lower part of the cleaning frame is an inclined block. The cleaning frame slides and fits the filter hole on the water-facing surface of the front side of the water inlet plate. The upper part of the side surface of the partition plates on both sides close to the water inlet plate is provided with a through hole. When the cleaning frame rises, the impurities filtered off the water inlet plate can be pushed up to align with the through hole on the partition plate. When the first solenoid valve is closed, the water in the water inlet area and the filter area is gradually filled up, and the full water surface covers the cleaning frame aligned with the through hole, so that the impurities scraped off the top surface of the cleaning frame flow into the impurity collection area with the channel water for temporary storage. When the cleaning frame descends, the inclined surface of its lower part pushes down again and cleans the impurities filtered on the water inlet plate, thereby driving the floating block to rise and fall with the rise and fall of the water surface in the sedimentation area, thereby driving the cleaning frame at the other end to move up and down through the U-shaped rod, so that the impurities filtered off the water inlet plate are automatically cleaned.

[0007] Further explanation, the filter assembly includes: a mounting frame, fixedly mounted in the filter area of ​​the ditch substrate, the side of the mounting frame close to the water inlet plate is open, and the upper part of the side away from the water inlet plate is symmetrically provided with flow openings; a plurality of activated carbon plates, arranged side by side inside the mounting frame, the activated carbon plates are located on the side of the mounting frame close to the water inlet plate, and the activated carbon plates are used to remove organic matter, color and odor in the water; a plurality of microporous filter plates, arranged side by side inside the mounting frame, the microporous filter plates are located on the side of the mounting frame close to the first baffle, and the microporous filter plates are used to filter out fine suspended particles in the water; a handle , respectively installed on the top of the activated carbon plate and the microporous filter plate, the handle is used to conveniently remove the activated carbon plate and the microporous filter plate from the installation frame for replacement or maintenance. When the ditch water flows into the filtration area through the filter holes on the water inlet plate, the filter holes on the water inlet plate will preliminarily filter out larger impurities such as branches, leaves, soil and stones in the water. After the preliminarily filtered water flows into the installation frame in the filtration area, it will be successively filtered by the activated carbon plate and the microporous filter plate in turn for multi-stage filtration, so that impurities such as organic matter, odor and fine suspended particles in the water are filtered in multiple stages. After the multi-stage filtration, the water will flow from the connecting pipe of the first baffle into the sedimentation area for subsequent treatment after the first solenoid valve is opened.

[0008] It is further explained that a flocculation component is provided on the second baffle, and the flocculation component includes: a mounting tank, symmetrically mounted on the top of the sedimentation area between the first baffle and the second baffle, the mounting tank being used to store flocculant; a screw rod, rotatably mounted in the mounting tank; a push plate, slidably arranged in the mounting tank, the push plate sealingly fits on the inner wall of the mounting tank, the push plate and the screw rod are threadedly connected; a filling pipe, arranged on the top of the mounting tank, the filling pipe is used to fill flocculant into the mounting tank, and a plug is provided on the filling pipe; an agent outlet pipe, connected to the top of the mounting tank close to the second baffle, The outlet of the discharge pipe leads to the sedimentation zone, and the rotating screw will drive the push plate to slide toward one side of the discharge pipe in the installation tank through the thread, so that the flocculant in the installation tank is added to the sedimentation zone through the discharge pipe, and the water after multi-stage filtration in the sedimentation zone is further optimized. Under the action of the flocculant, the fine suspended particles in the water (such as mud, algae, etc.) are aggregated into larger flocs, and the flocs are settled to the bottom of the sedimentation zone, which is convenient for subsequent centralized treatment. After the sedimentation is completed, the second solenoid valve is opened to discharge the fully purified water from the drain pipe of the second baffle, and the settled flocs will be filtered by the filter inside the drain pipe.

[0009] Further description, it also includes a toggle assembly, which includes: a one-way gear installed on the rotating shaft of the screw rod; a T-shaped rod fixedly connected to the U-shaped rod; a connecting rod symmetrically fixed to the two end parts of the rod body at the lower part of the T-shaped rod; a tooth plate arranged at the upper part of the connecting rod, the tooth plate is adapted to and meshes with the driving one-way gear, when the water level in the sedimentation area rises, the U-shaped rod is driven to rise by the floating block, and the U-shaped rod will synchronously drive the T-shaped rod and the connecting rod to move upward until the tooth plate on the connecting rod meshes and drives the corresponding one-way gear to rotate, thereby driving the screw rod to rotate through the one-way gear, so that the screw rod drives the push plate to move a distance in the installation tank, so that the flocculant in the installation tank is automatically filled into the sedimentation area through the discharge pipe.

[0010] It is further explained that a deflocculation assembly is provided on the inner wall of the second baffle plate, and the deflocculation assembly includes: a deflocculation pipe, which is vertically installed on the inner wall of the second baffle plate, and the lower end of the deflocculation pipe passes through the drain pipe of the second solenoid valve; a piston rod, which is slidably arranged inside the deflocculation pipe; a first one-way valve, which is arranged at the lower part of the deflocculation pipe, and the first one-way valve only allows the deflocculation pipe to be conducted from bottom to top, and the piston rod is pulled upward in the deflocculation pipe, so that the deflocculation pipe submerged under the water surface can draw out the flocs filtered on the filter screen upward, thereby avoiding blockage in the drain pipe where the second solenoid valve is located; a collecting piece, which is arranged on the inner wall of the second baffle plate, and the collecting piece is used to collect the flocs drawn out from the deflocculation pipe.

[0011] Further explanation: a lattice-distributed impurity suction port is circumferentially arranged on the pipe opening wall at the lower end of the deflocculation pipe, the deflocculation pipe passes through the pipe opening of the drain pipe where the second solenoid valve is located, and the impurity suction port of the deflocculation pipe is close to the filter screen at the second solenoid valve, thereby improving the deflocculation pipe's ability to absorb impurities filtered out by the filter screen.

[0012] Further explanation, the collecting component includes: a collecting tank, which is detachably mounted on the inner wall of the second baffle; a connecting pipe, which is connected between the collecting tank and the deflocculation pipe, and the position of the connecting pipe connected to the deflocculation pipe is higher than the first one-way valve; a second one-way valve, which is installed on the connecting pipe, and the second one-way valve only allows one-way conduction from the deflocculation pipe to the collecting tank in the connecting pipe; a ventilation pipe, which is connected to the top of the collecting tank, and the ventilation pipe is used to balance the air pressure in the collecting tank. After part of the water and settled flocs at the bottom of the sedimentation area are drawn into the deflocculation pipe by pulling up the piston rod, when the piston rod is pushed down again, the water mixed with flocs in the deflocculation pipe cannot pass through the first one-way valve, and can only be discharged into the collecting tank through the connecting pipe for temporary collection. At the same time, the ventilation pipe discharges the corresponding gas in the collecting tank, thereby balancing the air pressure inside the collecting tank.

[0013] The beneficial effects of the present invention are as follows: 1. The present invention drives the U-shaped rod by the floating block in the sedimentation area as the water level rises and falls, thereby driving the cleaning frame to move up and down, automatically cleaning the impurities filtered out on the water inlet plate, which not only reduces the need for manual maintenance, but also prevents the clogging of the filter holes of the water inlet plate, thereby ensuring that the ditch water flows smoothly into the filter assembly for filtration.

[0014] 2. After the ditch water is initially filtered on the water inlet plate, the activated carbon plate is used in the filtration area to remove organic matter, color and odor, and then the microporous filter plate is used to remove fine suspended particles. The whole process forms a multi-level filtration, which effectively improves the filtration effect of water quality.

[0015] 3. The flocculation component of the present invention utilizes mechanical structures such as one-way gears and T-shaped rods, combined with the rising action of the float block to realize automatic filling of flocculants. Under the action of the flocculant, some fine suspended particles that are difficult to be adsorbed and filtered are aggregated into flocs. The flocs integrated in the sedimentation area will settle to the bottom, making it easier to remove them regularly through the deflocculation component to further purify the water quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0017] Figure 2 It is a cross-sectional view of the side structure of the trench substrate of the present invention.

[0018] Figure 3 It is a three-dimensional structural schematic diagram of the U-shaped rod, the debris-clearing frame and the floating block of the present invention.

[0019] Figure 4 It is an exploded view of specific components of the filter assembly of the present invention.

[0020] Figure 5 It is a schematic diagram of the coordination relationship of the various components of the settling zone of the present invention.

[0021] Figure 6 It is a three-dimensional structural schematic diagram of the specific components of the flocculation assembly and the one-way gear of the present invention.

[0022] Figure 7 It is a schematic diagram of the matching relationship between the flocculation component and the paddle component of the present invention.

[0023] Figure 8 It is a schematic diagram of the three-dimensional structure of the deflocculation component of the present invention.

[0024] Fig. 9 For the present invention Figure 8 Enlarged view of point A in the middle.

[0025] Markings in the accompanying drawings: 1: ditch substrate, 101: water inlet area, 102: filtration area, 103: sedimentation area, 2: water inlet plate, 201: partition plate, 202: impurity collection area, 3: first baffle, 301: first solenoid valve, 4: second baffle, 401: second solenoid valve, 402: filter screen, 5: cleaning parts, 501: U-shaped rod, 502: cleaning frame, 503: floating block, 6: filter assembly, 601: installation frame, 602: activated carbon plate, 603: microporous filter plate , 604: handle, 605: flow port, 7: flocculation assembly, 701: installation tank, 702: screw rod, 703: push plate, 704: filling pipe, 705: discharge pipe, 8: toggle assembly, 801: one-way gear, 802: T-bar, 803: connecting rod, 804: tooth plate, 9: deflocculation assembly, 901: deflocculation pipe, 902: piston rod, 903: first one-way valve, 904: collection tank, 905: connecting pipe, 906: second one-way valve, 907: ventilation pipe. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with specific embodiments. Although preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0027] Embodiment 1: A water purification device for river farmland drainage ecological ditch, such as Figure 1-Figure 3As shown, it includes a ditch substrate 1, an inlet plate 2, a first baffle plate 3 and a second baffle plate 4. The ditch substrate 1 is a trapezoidal frame and is used to fit and install in the farmland drainage ditch. The inlet plate 2 is fixedly connected to the front side of the ditch substrate 1. A plurality of filter holes are arranged in the middle of the water-facing surface of the inlet plate 2. The front side of the inlet plate 2 of the ditch substrate 1 is a water inlet area 101. Partition plates 201 are arranged on both sides of the water inlet area 101. An impurity collection area 202 is arranged between the ditch substrate 1 and the partition plate 201. The first baffle plate 3 is fixedly connected to the middle part of the ditch substrate 1 and a connecting pipe is arranged at the bottom thereof. The filtration area 102 is arranged between the inlet plate 2 and the first baffle plate 3. The second baffle plate 4 is fixedly connected to the middle part of the ditch substrate 1 and a connecting pipe is arranged at the bottom thereof. A drainage pipe is provided at the rear side of the ditch substrate 1 and at its bottom, and a sedimentation area 103 is provided between the first baffle plate 3 and the second baffle plate 4; it also includes: a first solenoid valve 301, installed on the connecting pipe at the bottom of the first baffle plate 3; a second solenoid valve 401, installed on the drainage pipe at the bottom of the second baffle plate 4, the first solenoid valve 301 and the second solenoid valve 401 have a timing switch function, and a filter screen 402 is provided in the drainage pipe at the bottom of the second baffle plate 4; a debris cleaning part 5, the debris cleaning part 5 includes: a U-shaped rod 501, which is in an inverted U shape and crosses and is slidably connected to the side of the water inlet plate 2 and the first baffle plate 3; a debris cleaning frame 502, which is installed on the U-shaped rod At one end of the lower part of 501, the frame of the cleaning frame 502 is slidably fitted on the filter hole on the front side of the water inlet plate 2, and the two ends of the cleaning frame 502 are slidably fitted on the partition plates 201 on both sides. The cleaning frame 502 is used to clean the impurities filtered off the water inlet plate 2; the floating block 503 is installed at the other end of the lower part of the U-shaped rod 501, and the floating block 503 is located in the sedimentation area 103; the filter component 6 is arranged in the filter area 102 of the ditch substrate 1, and the filter component 6 is used to perform multi-stage filtration on the intercepted ditch water in the filter area 102, close the first solenoid valve 301 and the second solenoid valve 401, so that the water in the water inlet area 101 and the filter area 102 is filtered. The intercepted ditch water will gradually fill up, so that the ditch water is filtered by the filter assembly 6. After the filter area 102 is full, the first solenoid valve 301 is opened to allow the water in the filter area 102 to flow into the sedimentation area 103 through the connecting pipe. The float block 503 rises with the water level in the sedimentation area 103, so that the U-shaped rod 501 synchronously drives the cleaning frame 502 to rise and clean the impurities filtered on the water inlet plate 2. After the sedimentation area 103 is full, the first solenoid valve 301 is opened to drain the water. The float block 503 drops with the water level in the sedimentation area 103, and the impurities filtered on the water inlet plate 2 are cleaned again, thereby preventing impurities from clogging the filter holes of the water inlet plate 2.

[0028] like Figure 2 and Figure 3As shown, the top of the cleaning frame 502 is a symmetrical inclined surface facing outward and downward, and the lower part of the cleaning frame 502 is an inclined block. The cleaning frame 502 is slidably fitted on the filter hole on the front water-facing surface of the water inlet plate 2. The upper part of the side of the partition plates 201 on both sides close to the water inlet plate 2 is provided with a through hole. When the cleaning frame 502 rises, the impurities filtered off the water inlet plate 2 can be pushed up to the through hole on the partition plate 201. When the first solenoid valve 301 is closed, the water in the water inlet area 101 and the filter area 102 is gradually accumulated. After it is full, the water surface is filled above the cleaning frame 502 aligned with the opening, so that the impurities scraped off the top surface of the cleaning frame 502 flow into the impurity collecting area 202 with the canal water for temporary storage. When the cleaning frame 502 descends, the inclined surface at its lower part pushes down again and cleans the impurities filtered on the water inlet plate 2, thereby driving the floating block 503 to rise and fall with the rise and fall of the water surface in the sedimentation area 103, thereby driving the cleaning frame 502 at the other end to move up and down through the U-shaped rod 501, so that the impurities filtered on the water inlet plate 2 are automatically cleaned.

[0029] like Figure 1 , Figure 3 and Figure 4 As shown, the filter assembly 6 includes: a mounting frame 601, which is fixedly mounted in the filter area 102 of the ditch substrate 1, the side of the mounting frame 601 close to the water inlet plate 2 is open, and the upper part of the side away from the water inlet plate 2 is symmetrically provided with a flow port 605; a plurality of activated carbon plates 602, which are arranged side by side inside the mounting frame 601, the activated carbon plates 602 are located on the side of the mounting frame 601 close to the water inlet plate 2, and the activated carbon plates 602 are used to remove organic matter, color and odor in the water; a plurality of microporous filter plates 603, which are arranged side by side inside the mounting frame 601, the microporous filter plates 603 are located on the side of the mounting frame 601 close to the first baffle plate 3, and the microporous filter plates 603 are used to filter out fine suspended particles in the water; handles 604, which are respectively mounted on the activated carbon plates 603 and the activated carbon plates 604 are respectively mounted on the activated carbon plates 603 and the activated carbon plates 604 are respectively mounted on the activated carbon plates 603 and the activated carbon plates 604 are respectively mounted on the activated carbon plates 603 and the activated carbon plates 604 are respectively mounted on the activated carbon plates 603 and the activated carbon plates 602 ... At the top of the plate 602 and the microporous filter plate 603, the handle 604 is used to conveniently remove the activated carbon plate 602 and the microporous filter plate 603 from the installation frame 601 for replacement or maintenance. When the ditch water flows into the filter area 102 through the filter holes on the water inlet plate 2, the filter holes on the water inlet plate 2 will preliminarily filter out larger impurities such as branches, leaves, soil and stones in the water. After the preliminarily filtered water flows into the installation frame 601 in the filter area 102, it will be successively multi-stage filtered by the activated carbon plate 602 and the microporous filter plate 603, so that impurities such as organic matter, odor and fine suspended particles in the water are filtered in multiple stages. After the multi-stage filtration, the water will flow from the connecting pipe of the first baffle 3 into the sedimentation area 103 for subsequent treatment after the first solenoid valve 301 is opened.

[0030] When using the device to purify water in a river farmland drainage ditch, first stably install the ditch substrate 1 and intercept it at a suitable water purification position on the drainage ditch, and the user sets the switching timing of the first solenoid valve 301 and the second solenoid valve 401 in advance according to the current water flow of the farmland drainage ditch, and first closes the first solenoid valve 301 and the second solenoid valve 401 at the same time. When the farmland drainage flows into the water inlet area 101 at the front end of the ditch substrate 1, the water flow will first flow into the filter area 102 through the filter holes on the water inlet plate 2. These filter holes can intercept larger impurities such as branches, leaves, soil and stones to prevent them from entering the subsequent treatment area. After preliminary filtration, the water flow enters the filter area 102, and the water flow in the filter area 102 will pass through the multi-layer activated carbon plate 60 in sequence. 2 and microporous filter plate 603, wherein the activated carbon plate 602 can effectively remove organic matter, color and odor in the water, and the microporous filter plate 603 can further remove fine suspended particles. The multi-stage filtration mechanism in this process can effectively purify and improve the water quality. When the filtered water in the installation frame 601 submerges the flow port 605 at the rear side thereof, it will flow into the compartment where the first electromagnetic valve 301 is located in the filtration area 102. During this period, since the first electromagnetic valve 301 is in a closed state, as the water flow continues to flow in from the water inlet area 101, the filtered water level in the filtration area 102 gradually rises. When the filtration area 102 is gradually filled, the first electromagnetic valve 301 is opened at a fixed time, and the filtered clean water flows into the sedimentation area 103 through the connecting pipe of the first electromagnetic valve 301. At this time, the second solenoid valve 401 is in a closed state. As the water level in the sedimentation area 103 gradually rises, the floating block 503 provided therein will rise synchronously under the effect of floating on the water surface. The rising floating block 503 will drive the cleaning frame 502 to rise through the U-shaped rod 501. The upwardly moving cleaning frame 502 will clean up the larger impurities filtered out from the front side of the water inlet plate 2. Until the water in the sedimentation area 103 is gradually filled up, the cleaning frame 502 that scrapes the water inlet plate 2 upwards will move to the openings of the partition plates 201 on both sides, so that the larger impurities scraped off the cleaning frame 502, under the guidance of the upper inclined surface, will flow into the impurity collecting areas 202 on both sides from the openings of the partition plates 201 for temporary collection together with part of the water flow. When the water in the sedimentation area 103 is completely filled up, the cleaning frame 502 that scrapes the water inlet plate 2 upwards will move to the openings of the partition plates 201 on both sides. When the water level in the sedimentation area 103 drops, the floating block 503 also drives the cleaning frame 502 to reset and drop through the U-shaped rod 501, so that the inclined surface at the bottom of the cleaning frame 502 scrapes the newly filtered impurities on the filter holes of the water inlet plate 2 downward again. After the cleaning frame 502 is immersed in the ditch water of the water inlet area 101 again, the scraped impurities will return to the ditch water, and will be cleaned by the upwardly moved cleaning frame 502 when it is blocked on the water inlet plate 2 later. Thus, the water level rise and fall in the sedimentation area 103 is used as the driving force, so that the cleaning frame 502 can automatically reciprocate and rise and fall under the drive of the floating block 503.It ensures that the filter holes on the water inlet plate 2 will not be blocked due to the accumulation of impurities, ensuring the smooth flow of water. When the activated carbon plate 602 and the microporous filter plate 603 are blocked and the filtering effect is reduced, the blocked activated carbon plate 602 and the microporous filter plate 603 can be taken out from the installation frame 601 through the upper handle 604, so as to facilitate the cleaning, maintenance or replacement of the activated carbon plate 602 and the microporous filter plate 603, so that the filter assembly 6 can always maintain a good purification effect on the ditch water.

[0031] Embodiment 2: Based on embodiment 1, Figure 1 , Figure 6 and Figure 7 As shown, the second baffle 4 is provided with a flocculation assembly 7, which includes: a mounting tank 701, symmetrically mounted on the top of the sedimentation area 103 between the first baffle 3 and the second baffle 4, the mounting tank 701 being used to store flocculants; a screw rod 702, rotatably mounted in the mounting tank 701; a push plate 703, slidably arranged in the mounting tank 701, the push plate 703 is sealed and attached to the inner wall of the mounting tank 701, and the push plate 703 and the screw rod 702 are threadedly connected; a filling pipe 704, arranged at the top of the mounting tank 701, the filling pipe 704 is used to fill the flocculants into the mounting tank 701, and a plug is provided on the filling pipe 704; an agent outlet pipe 705, connected to the top of the mounting tank 701 near the second baffle 4, the agent outlet pipe 705 05 outlet leads to the sedimentation area 103, the rotating screw 702 will drive the push plate 703 to slide toward the side of the agent outlet pipe 705 in the installation tank 701 through the thread, so that the flocculant in the installation tank 701 is added to the sedimentation area 103 through the agent outlet pipe 705, and the water after multi-stage filtration in the sedimentation area 103 is further optimized. Under the action of the flocculant, the fine suspended particles in the water (such as mud, algae, etc.) are aggregated into larger flocs, and the flocs are settled to the bottom of the sedimentation area 103, which is convenient for subsequent centralized treatment. After the sedimentation is completed, the second solenoid valve 401 is opened to discharge the fully purified water from the drain pipe of the second baffle 4, and the settled flocs will be filtered by the filter 402 inside the drain pipe.

[0032] like Figure 5-Figure 7As shown, the toggle assembly 8 is also included, which includes: a one-way gear 801, which is installed on the rotating shaft of the screw rod 702; a T-shaped rod 802, which is fixed to the U-shaped rod 501; a connecting rod 803, which is symmetrically fixed to the two ends of the rod body at the lower part of the T-shaped rod 802; a tooth plate 804, which is arranged on the upper part of the connecting rod 803, and the tooth plate 804 is adapted to and meshes with the one-way gear 801. When the water level in the sedimentation area 103 rises, the floating block 503 drives When the U-shaped rod 501 rises, the U-shaped rod 501 will synchronously drive the T-shaped rod 802 and the connecting rod 803 to move upward until the tooth plate 804 on the connecting rod 803 meshes and drives the corresponding one-way gear 801 to rotate, thereby driving the screw rod 702 to rotate through the one-way gear 801, so that the screw rod 702 drives the push plate 703 to move a certain distance in the installation tank 701, so that the flocculant in the installation tank 701 is automatically filled into the sedimentation area 103 through the discharge pipe 705.

[0033] like Figure 1 , Figure 5 , Figure 8 and Fig. 9 As shown, a deflocculation assembly 9 is provided on the inner wall of the second baffle plate 4, and the deflocculation assembly 9 includes: a deflocculation tube 901, which is vertically installed on the inner wall of the second baffle plate 4, and the lower end of the deflocculation tube 901 penetrates the drainage pipe of the second solenoid valve 401; a piston rod 902, which is slidably arranged inside the deflocculation tube 901; a first one-way valve 903, which is arranged at the lower part of the deflocculation tube 901, and the first one-way valve 903 only allows the deflocculation tube 901 to be conducted from bottom to top, and the piston rod 902 is pulled upward in the deflocculation tube 901, so that the deflocculation tube 901 immersed under the water surface can be pulled out upward The flocs on the filter screen 402 are filtered to avoid blockage of the drain pipe where the second solenoid valve 401 is located; a collecting member is arranged on the inner wall of the second baffle 4, and the collecting member is used to collect the flocs drawn out from the deflocculation tube 901; a suction port with a grid distribution is arranged on the pipe mouth wall of the lower end of the deflocculation tube 901, and the deflocculation tube 901 runs through the pipe mouth of the drain pipe where the second solenoid valve 401 is located, and the suction port of the deflocculation tube 901 is close to the filter screen 402 at the second solenoid valve 401, so that the deflocculation tube 901 can absorb the impurities filtered by the filter screen 402.

[0034] like Figure 8 and Fig. 9As shown, the collecting member includes: a collecting tank 904, which is detachably mounted on the inner wall of the second baffle 4; a connecting pipe 905, which is connected between the collecting tank 904 and the deflocculation pipe 901, and the position where the connecting pipe 905 is connected to the deflocculation pipe 901 is higher than the first one-way valve 903; a second one-way valve 906, which is mounted on the connecting pipe 905, and the second one-way valve 906 only allows one-way conduction from the deflocculation pipe 901 to the collecting tank 904 in the connecting pipe 905; a vent pipe 907, which is connected to the top of the collecting tank 904, The vent pipe 907 is used to balance the air pressure in the collection tank 904. After part of the water and settled flocs at the bottom of the sedimentation area 103 are drawn into the deflocculation pipe 901 by pulling up the piston rod 902, the water mixed with flocs in the deflocculation pipe 901 cannot pass through the first one-way valve 903 when the piston rod 902 is pushed down, and can only be discharged into the collection tank 904 through the connecting pipe 905 for temporary collection. At the same time, the vent pipe 907 discharges the corresponding gas in the collection tank 904, thereby balancing the air pressure inside the collection tank 904.

[0035] After the installation tank 701 is filled with flocculant in advance through the filling pipe 704, when the water after multi-stage filtration in the filtration area 102 flows into the sedimentation area 103, as the water level in the sedimentation area 103 rises, the floating block 503 floats up and drives the U-shaped rod 501 to rise synchronously, and the rising U-shaped rod 501 will drive the connecting rod 803 to move upward synchronously through the T-shaped rod 802. When the tooth plate 804 of the upward connecting rod 803 passes through and meshes with the corresponding one-way gear 801, the one-way gear 801 is rotated at this time to drive the screw rod 702 to rotate, and the rotating screw rod 702 drives the push plate 703 to move toward the side of the discharge pipe 705 in the installation tank 701 through the thread, so that the push plate 703 pushes the flocculant in the installation tank 701 into the discharge pipe 705 and passes through the discharge pipe 705. 05 Add flocculant to the gradually rising water in the sedimentation zone 103, so that a small part of fine suspended particles in the sedimentation zone 103 that are not easily filtered in the filtration zone 102 are aggregated into larger flocs under the flocculation effect and settle to the bottom of the sedimentation zone 103. When the fully flocculated water in the sedimentation zone 103 is gradually filled, the first solenoid valve 301 is closed at a fixed time and the second solenoid valve 401 is opened, so that the purified water in the sedimentation zone 103 is discharged from the drain pipe where the second solenoid valve 401 is located. At this time, the flocs flowing out with the water will be filtered by the filter screen 402 in the drain pipe. When the water surface in the sedimentation zone 103 drives the floating block 503 to descend, the floating block 503 drives the entire T-shaped rod 802 and the connecting rod 803 to descend again through the U-shaped rod 501. This time, the connecting rod 802 and the connecting rod 803 are connected. When the toothed plate 804 on the connecting rod 803 meshes with the one-way gear 801 again, due to the characteristics of the one-way gear 801, the one-way gear 801 cannot drive the screw rod 702 and idles, causing the push plate 703 to stagnate in the installation tank 701 without affecting the subsequent filling of flocculant. When the flocs continue to accumulate on the filter screen 402 inside the drain pipe and cause blockage, resulting in reduced drainage efficiency of the drain pipe, when there is water in the sedimentation area 103, the maintenance personnel manually pull up the piston rod 902. Since the second one-way valve 906 unidirectionally conducts to the collection tank 904, the pulled-up piston rod 902 causes the submerged deflocculation pipe 901 to generate an upward suction force, and the flocs blocked near the filter screen 402 are drawn upward into the deflocculation pipe 901 along with the water flow. When the piston rod 902 is pushed, since the first one-way valve 903 is unidirectionally conducted upward in the deflocculation pipe 901, the flocs and water drawn into the deflocculation pipe 901 above the first one-way valve 903 cannot flow back to the sedimentation area 103, and can only flow into the collection tank 904 through the connecting pipe 905 for temporary storage. At the same time, the collection tank 904 discharges the corresponding air to the outside through the ventilation pipe 907 to keep the air pressure in the collection tank 904 balanced. Therefore, the operator can manually pull the piston rod 902 up and down to clean the flocs that cause blockage at the filter screen 402. The cleaned flocs will be continuously transported to the collection tank 904 for storage to ensure the smooth flow of the drainage pipe. Finally, the collection tank 904 is removed from the second baffle 4 to centrally process the collected sedimentation materials.

[0036] Although the present disclosure has been described with respect to only a limited number of embodiments, those skilled in the art having benefit of this disclosure will appreciate that various other embodiments can be devised without departing from the scope of the present invention. Accordingly, the scope of the present invention should be limited only by the appended claims.

Claims

1. A water purification device for an ecological ditch for draining water from a river farmland, comprising a ditch base plate (1), a water inlet plate (2), a first baffle plate (3) and a second baffle plate (4), wherein the ditch base plate (1) is a trapezoidal frame, the water inlet plate (2) is fixedly connected to the front side of the ditch base plate (1), a plurality of filter holes are arranged in the middle of a water-facing surface of the water inlet plate (2), the front side of the water inlet plate (2) of the ditch base plate (1) is a water inlet area (101), and partition plates ( 201), between the ditch base plate (1) and the partition plate (201) is an impurity collection area (202), the first baffle plate (3) is fixedly connected to the middle of the ditch base plate (1) and a connecting pipe is provided at its bottom, between the water inlet plate (2) and the first baffle plate (3) is a filtration area (102), the second baffle plate (4) is fixedly connected to the rear side of the ditch base plate (1) and a drainage pipe is provided at its bottom, and between the first baffle plate (3) and the second baffle plate (4) is a sedimentation area (103); Its characteristics are: Also included are: A first solenoid valve (301) is installed on the connecting pipe at the bottom of the first baffle (3); A second solenoid valve (401) is installed on a drainage pipe at the bottom of the second baffle plate (4), and a filter screen (402) is arranged in the drainage pipe at the bottom of the second baffle plate (4); A debris removal part (5), wherein the debris removal part (5) comprises: A U-shaped rod (501) is in an inverted U shape and spans and is slidably connected to the side surfaces of the water inlet plate (2) and the first baffle plate (3); A cleaning frame (502) is mounted on one end of the lower portion of the U-shaped rod (501), the frame body of the cleaning frame (502) being slidably attached to the front side of the water inlet plate (2), and the cleaning frame (502) is used to clean impurities filtered off the water inlet plate (2); A floating block (503) is installed at the other end of the lower part of the U-shaped rod (501), and the floating block (503) is located in the sedimentation area (103); A filter assembly (6) is arranged in the filter area (102) of the ditch substrate (1), and the filter assembly (6) is used to perform multi-stage filtration on intercepted ditch water in the filter area (102); The top of the cleaning frame (502) is a symmetrical inclined surface facing outward and downward, the lower part of the cleaning frame (502) is an inclined block, the cleaning frame (502) is slidably fitted on the filter holes on the water-facing surface of the front side of the water inlet plate (2), and the upper part of the side of the partition plates (201) on both sides close to the water inlet plate (2) is provided with a through opening; The filter assembly (6) comprises: a mounting frame (601) fixedly mounted in the filter area (102) of the ditch substrate (1); a side of the mounting frame (601) close to the water inlet plate (2) is open, and a flow opening (605) is symmetrically arranged on the upper portion of a side facing away from the water inlet plate (2); A plurality of activated carbon plates (602) are arranged side by side inside the installation frame (601), wherein the activated carbon plates (602) are located on a side of the installation frame (601) close to the water inlet plate (2); A plurality of microporous filter plates (603) are arranged side by side inside the installation frame (601), and the microporous filter plates (603) are located on a side of the installation frame (601) close to the first baffle (3); The handles (604) are respectively installed on the top of the activated carbon plate (602) and the microporous filter plate (603).

2. A water purification device for river farmland drainage ecological ditch according to claim 1, characterized in that: The second baffle (4) is provided with a flocculation component (7), and the flocculation component (7) comprises: An installation tank (701) is symmetrically installed at the top of the sedimentation area (103) between the first baffle (3) and the second baffle (4), and the installation tank (701) is used to store flocculant; A screw rod (702) is rotatably mounted in the mounting tank (701); A push plate (703) is slidably disposed in the installation pot (701), the push plate (703) is sealingly attached to the inner wall of the installation pot (701), and the push plate (703) and the screw rod (702) are threadedly connected; A filling pipe (704) is arranged at the top of the installation tank (701), the filling pipe (704) is used to add flocculant into the installation tank (701), and a plug is provided on the filling pipe (704); The agent outlet pipe (705) is connected to the top of the installation tank (701) near the second baffle (4), and the outlet of the agent outlet pipe (705) leads to the sedimentation area (103). The rotating screw (702) drives the push plate (703) to slide toward one side of the agent outlet pipe (705) in the installation tank (701) through the thread.

3. A water purification device for river farmland drainage ecological ditch according to claim 2, characterized in that: It also includes a toggle assembly (8), the toggle assembly (8) comprising: A one-way gear (801) is mounted on the rotating shaft of the screw rod (702); A T-shaped rod (802) fixedly connected to the U-shaped rod (501); A connecting rod (803) symmetrically fixed to two ends of the rod body at the lower part of the T-shaped rod (802); A toothed plate (804) is arranged on the upper part of the connecting rod (803), and the toothed plate (804) is adapted to and meshes with the driving one-way gear (801).

4. A water purification device for river farmland drainage ecological ditch according to claim 3, characterized in that: A flocculation removal component (9) is provided on the inner wall of the second baffle (4), and the flocculation removal component (9) comprises: A flocculation removal pipe (901) is vertically mounted on the inner wall of the second baffle (4), and the lower end of the flocculation removal pipe (901) penetrates the drainage pipe of the second solenoid valve (401); A piston rod (902) is slidably disposed inside the deflocculation tube (901); A first one-way valve (903) is arranged at the lower part of the deflocculation pipe (901), and the first one-way valve (903) only allows the deflocculation pipe (901) to be connected from bottom to top; A collecting member is arranged on the inner wall of the second baffle (4), and is used to collect floccules extracted from the deflocculation pipe (901).

5. A water purification device for river farmland drainage ecological ditch according to claim 4, characterized in that: A suction port with a grid distribution is circumferentially provided on the pipe opening wall at the lower end of the deflocculation pipe (901). The deflocculation pipe (901) passes through the pipe opening of the drainage pipe where the second solenoid valve (401) is located. The suction port of the deflocculation pipe (901) is close to the filter screen (402) at the second solenoid valve (401).

6. A water purification device for river farmland drainage ecological ditch according to claim 5, characterized in that: The collection piece includes: A collecting tank (904) is detachably mounted on the inner wall of the second baffle (4); A connecting pipe (905) is connected between the collecting tank (904) and the deflocculation pipe (901), and the position where the connecting pipe (905) is connected to the deflocculation pipe (901) is higher than the first one-way valve (903); A second one-way valve (906) is installed on the connecting pipe (905), and the second one-way valve (906) only allows one-way conduction from the deflocculation pipe (901) to the collection tank (904) in the connecting pipe (905); A vent pipe (907) is connected to the top of the collection tank (904), and the vent pipe (907) is used to balance the air pressure in the collection tank (904).

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