A device and method for preventing and controlling agricultural non-point source pollution on sloping cultivated land

Abstract

The invention discloses a device for preventing and controlling agricultural non-point source pollution of sloping cultivated land and a method thereof, comprising one or more drainage units; the drainage unit comprises a transverse channel and a longitudinal channel; a transverse bar is fixedly connected to the inner side wall of the transverse channel; a grass-planting frame is arranged on the transverse bar; a symmetrically arranged blocking plate is fixedly connected to the middle of the transverse channel, the interior of the transverse channel is divided by the blocking plate to form an installation groove; sewage discharge parts composed of enclosures are arranged at both ends of the transverse channel; by arranging the grass-planting frame, the transverse channel, the longitudinal channel and the push plate, the flow speed of rainwater can be slowed down, so that it can be deposited without affecting the flow of the transverse channel and the longitudinal channel, and then it is transferred to the inside of the sewage discharge part by the push plate, and restored to the surface of the soil layer of the sloping cultivated land by a mud pump, so as to avoid the mud on the sloping cultivated land being washed away by rainwater, resulting in soil erosion and non-point source pollution, and also to avoid silt blocking the flow of the transverse channel or the longitudinal channel, thereby affecting the non-point source prevention and control effect.

Description

Technical Field

[0001] The invention belongs to the technical field of non-point source pollution prevention and control, and specifically relates to a device for preventing and controlling agricultural non-point source pollution of sloping cultivated land and a prevention and control method thereof. Background Art

[0002] Agricultural non-point source pollution refers to the process in which pollutants such as nitrogen, phosphorus, and pesticides migrate and diffuse from farmland ecosystems to water bodies in a wide-area, trace, and dispersed form during agricultural production activities. Unlike point source pollution (such as factory emissions, sewage treatment plants, etc.), non-point source pollution has no clear discharge outlets. Pollutants are brought into water bodies, soil or the atmosphere through natural processes such as precipitation and wind, and are dispersed, hidden, and widespread.

[0003] Patent CN115925124A discloses a device and method for preventing and controlling agricultural non-point source pollution on sloping farmland. The device can switch the plants immersed in the drainage ditches of sloping farmland, increase the arrangement of plants, and absorb nitrogen and phosphorus flowing into the water from the farmland and residual pesticides in the water body by switching different plants, thereby achieving the purpose of reducing agricultural non-point source pollution.

[0004] However, in the technical solution of the above patent, plants need to be set inside the drainage ditch to achieve the purpose of reducing non-point source pollution through plants. In actual agricultural operations, pollutants such as nitrogen, phosphorus and pesticides are often transferred to the drainage ditch along with rainfall. After being washed by rainwater, soil often flows into the drainage ditch along with rainwater, nitrogen, phosphorus and pesticides, which not only easily leads to blockage of the drainage ditch, but also easily causes non-point source pollution in terms of soil loss. Summary of the invention

[0005] The purpose of the present invention is to provide a device and method for preventing and controlling agricultural non-point source pollution in sloping farmland to solve the technical problem of non-point source pollution in the prior art, in which soil in sloping farmland is lost along with rainwater, leading to blockage of drainage ditches and soil loss.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A device for preventing and controlling agricultural non-point source pollution in sloping cultivated land and a method for preventing and controlling the pollution, comprising one or more drainage units; the drainage unit comprises a transverse channel and a longitudinal channel; a transverse bar is fixedly connected to the inner wall of the transverse channel; a grass planting frame is arranged on the transverse bar; a symmetrically arranged blocking plate is fixedly connected to the middle of the transverse channel, and the interior of the transverse channel is divided by the blocking plate to form an installation groove; sewage discharge parts consisting of enclosures are arranged at both ends of the transverse channel; a push plate is slidably arranged in the transverse channel at a position corresponding to the position below the blocking plate; a long plate is fixedly connected in the middle of the transverse channel, and the long plate is located below the longitudinal channel; a plurality of evenly distributed rotating shafts are rotatably connected to the long plate, and the two ends of the rotating shaft are rotatably connected to the side wall of the transverse channel; a rotating plate is fixedly connected to the rotating shaft; a cut with the same width as the long plate is opened in the rotating plate corresponding to the position of the long plate.

[0008] Preferably, a connecting rope is provided in the middle part of the push plate, and the connecting rope is connected to each other at both ends to present a straight slot-shaped structure, and the two ends of the connecting rope of the straight slot-shaped structure are respectively located inside the mounting groove and the sewage discharge part; a through hole equal to the diameter of the connecting rope is opened on the push plate, and the through hole is slidably connected to the lower part of the connecting rope, and the upper part of the connecting rope is fixedly connected to the push plate.

[0009] Preferably, a first guide wheel is rotatably connected inside the sewage discharge part, and the connecting rope is rotatably connected to the first guide wheel; two shafts are rotatably arranged inside the installation groove, one of which is rotatably connected to the second guide wheel, and the other shaft is fixedly connected to the third guide wheel; extrusion teeth are fixedly connected between the second guide wheel and the third guide wheel, and the connecting rope is arranged between the two extrusion teeth; the second guide wheel and the third guide wheel are fixedly connected to meshing teeth on both sides corresponding to the extrusion teeth, and the meshing teeth mesh with each other; a motor is also fixedly arranged inside the installation groove, and a second sprocket is fixedly arranged at the output end of the motor; and the first sprocket is fixedly connected to the shaft.

[0010] Preferably, one end of the first rotating plate close to the mounting groove presents a conical structure that fits the bottom of the horizontal channel, and the other end presents a right-angle structure, and one end of the remaining rotating plates presents a conical structure that fits the bottom of the horizontal channel, and the other end is a concave structure that fits the conical structure.

[0011] Preferably, one end of the rotating shaft passes through the outside of the horizontal channel, and a connecting rod is fixedly connected to the end of the rotating shaft, and the angle between the connecting rod and the rotating plate is 30°-60°; a movable groove is provided in the middle of the connecting rod; a limiting frame is provided on the conical portion of the horizontal channel corresponding to the side where the rotating shaft passes through the outer wall, and the limiting frame is composed of two intersecting triangular plates, a cross bar and a semicircular plate, and the corresponding cross bars and triangular plates are in the same plane, and the angle between the cross bars and the inclined surfaces of the triangular plates is 30°-60°.

[0012] Preferably, a plurality of evenly distributed limit blocks are fixedly connected to one side of the transverse channel close to the limit frame; a moving rod is slidably arranged inside the limit blocks in the same plane; a roller is rotatably connected to one end of the moving rod close to the limit frame, and the roller abuts against the inclined surface on the limit frame; a round rod is fixedly connected to one end of the moving rod away from the limit frame; a spring is sleeved on the round rod, and two ends of the spring are respectively connected to the end of the moving rod and the outermost limit block.

[0013] Preferably, a telescopic cylinder is fixedly arranged in the installation groove, and the output end of the telescopic cylinder penetrates to the upper surface of the sealing plate; a connecting block is fixedly arranged at the end of the output end of the telescopic cylinder, and a rod body is fixedly arranged at the other end of the connecting block, and the lower end of the rod body is connected to the semicircular plate on the limit frame; the movable rod in the same plane is arranged inside the movable groove on the connecting rod, and the movable rod is rotatably connected to the lower end of the connecting rod.

[0014] Preferably, the horizontal channel has a V-shaped structure, with the cone portion arranged at the upper part of the sloping cultivated land. There are two longitudinal channels, which are connected to the horizontal channel through openings at the ends thereof; the horizontal channel is deeper and the longitudinal channel is shallower, and the longitudinal channels are connected at half the depth of the horizontal channel.

[0015] Preferably, a method for preventing and controlling agricultural non-point source pollution on sloping cultivated land comprises the following steps:

[0016] S1: Build horizontal channels on the sloping farmland, and build connecting longitudinal channels at both ends of the horizontal channels, so that the horizontal channels are connected end to end in sequence, ensuring that each horizontal channel presents a multi-channel folded structure after construction;

[0017] Insert a partition in the sewage discharge portion at the end of the outermost transverse channel, and remove the partition in the sewage discharge portion at the end of the inner transverse channel;

[0018] S2: Place grass frames with plants planted in advance in the horizontal channel to purify polluted water through plants that can absorb nitrogen, phosphorus or pesticides in the water;

[0019] The plant isolation belt formed on the grass frame intercepts large objects and slows down the water flow;

[0020] S3: The rotating plates are rotated 90° clockwise by the telescopic cylinder, so that all the rotating plates are in a horizontal state, and the internal space of the horizontal channel is divided into two parts, the upper and lower parts. During the rotation of the rotating plates, the settled sludge continues to remain at the bottom of the horizontal channel;

[0021] S4: The motor drives the third guide wheel to rotate through the shaft, and the second guide wheel rotates synchronously with the third guide wheel. Then, the connecting rope is driven to rotate through the cooperation of the extrusion teeth on the second guide wheel and the third guide wheel, so that the connecting rope can drive the push plate to push the sludge at the bottom of the horizontal channel to the inside of the sewage discharge part outside;

[0022] S5: Use a mud pump to remove the silt from the formed three-dimensional enclosure space and discharge it back onto the soil layer of the sloping cultivated land.

[0023] Preferably, in the step S4, the rotating plate and the long plate separate the internal space of the transverse channel into two parts, the upper and lower parts, and the sludge is separated in the lower part; the upper space in the transverse channel and the rotating plate form a shallower temporary water channel.

[0024] Beneficial effects of the present invention:

[0025] 1) The present invention can slow down the flow speed of rainwater by setting up grass-planting frames, transverse channels, longitudinal channels and push plates, so that rainwater can be deposited without affecting the flow of transverse channels and longitudinal channels. Then, the rainwater can be transferred to the inside of the sewage discharge part by the push plate, and restored to the surface of the soil layer of the sloping cultivated land by the mud pump, so as to prevent the mud on the sloping cultivated land from being washed away by rainwater, resulting in soil erosion and non-point source pollution. It can also prevent silt from blocking the flow of transverse channels or longitudinal channels, thereby affecting the non-point source prevention and control effect.

[0026] 2) In the present invention, the rotating plate and the long plate divide the internal space of the horizontal channel into two parts, the upper space in the horizontal channel and the rotating plate form a shallow temporary water channel, which can be used for dredging during the process of sewage discharge to prevent and control non-point source pollution, thereby avoiding blockage in the horizontal channel during sewage discharge, which affects the circulation of polluted water and further affects the non-point source prevention and control of sloping farmland.

[0027] 3) The present invention divides the internal space of the transverse channel into two parts, upper and lower, by means of a rotating plate and a long plate. The sludge is separated in the lower part. Therefore, when the push plate pushes the sludge to move, the rotating plate arranged laterally can assist the push plate in pushing the sludge to the sewage discharge part, thereby preventing the sludge from bulging during the pushing process.

[0028] 4) The present invention can also use plants to form a barrier wall by setting a grass frame on the upper part of the horizontal channel and the vertical channel to prevent plastic garbage and plant straw brought by rainwater from clogging the horizontal channel or the vertical channel, affecting the circulation of polluted water and making it lose its prevention and control effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 It is a schematic diagram of the structure inside the horizontal channel of the present invention;

[0032] Figure 3 It is a top view of the horizontal channel in the present invention;

[0033] Figure 4 It is a schematic diagram of the structure of the moving rod in the present invention;

[0034] Figure 5 It is a schematic diagram of the limit frame structure in the present invention;

[0035] Figure 6 It is a schematic diagram of the cooperation between the push plate and the connecting rope in the present invention;

[0036] Figure 7 It is a schematic diagram of the structure of the second guide wheel in the present invention.

[0037] In the figure:

[0038] 1. Horizontal channel; 101. Through port; 102. Mounting slot; 103. Horizontal bar; 104. Grass planting frame; 105. Drainage part; 106. Partition plate; 107. Sealing plate; 2. Longitudinal channel; 3. Long board; 301. Rotating shaft; 302. Rotating plate; 303. Incision; 304. Connecting rod; 305. Movable slot; 306. Moving rod; 307. Round rod; 308. Spring; 309. Stop block; 310. Roller; 311. 11. Limiting frame; 312. Rod body; 313. Telescopic cylinder; 314. Connecting block; 4. Blocking plate; 401. Push plate; 402. Connecting rope; 403. Perforation; 404. First guide wheel; 405. Second guide wheel; 406. Third guide wheel; 407. Extrusion teeth; 408. Meshing teeth; 409. Shaft; 410. First sprocket; 411. Motor; 412. Second sprocket; 413. Chain. DETAILED DESCRIPTION

[0039] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figure 1-Figure 2 As shown, a device for preventing and controlling agricultural non-point source pollution on sloping farmland and a method for preventing and controlling pollution on sloping farmland include one or more drainage units; the drainage unit includes a horizontal channel 1 and a vertical channel 2 arranged in the soil layer of the sloping farmland, the horizontal channel 1 presents a V-shaped structure, and the cone is arranged at the upper part of the sloping farmland, and there are two vertical channels 2, which are connected to the horizontal channel 1 through openings 101 at the ends thereof; the horizontal channel 1 is deeper, and the vertical channel 2 is shallower, and the vertical channel 2 is connected at half the depth of the horizontal channel 1.

[0041] Please refer again Figure 2-Figure 4As shown, a symmetrically arranged blocking plate 4 is fixed to the middle of the transverse channel 1, and the interior of the transverse channel 1 is divided by the blocking plate 4 to form a mounting groove 102; a sealing plate 107 of a matching shape is arranged on the upper part of the mounting groove 102; sewage discharge parts 105 consisting of enclosures are arranged at both ends of the transverse channel 1; and a partition plate 106 is inserted at the outer end of the sewage discharge part 105 from top to bottom.

[0042] Please refer again Figure 3 As shown, a horizontal bar 103 is fixedly connected to the inner wall of the horizontal channel 1; a grass planting frame 104 is arranged on the horizontal bar 103, and the grass planting frame 104 is used to plant plants that absorb nitrogen, phosphorus or pesticides in water, such as canna, pickerel grass, and foxtail algae.

[0043] Please refer again Figure 2 and Figure 5 As shown, a long board 3 is fixedly connected in the middle of the transverse channel 1, and the long board 3 is located below the longitudinal channel 2; a plurality of evenly distributed rotating shafts 301 are rotatably connected to the long board 3, and both ends of the rotating shafts 301 are rotatably connected to the side walls of the transverse channel 1; a rotating plate 302 is fixedly connected to the rotating shafts 301; a cutout 303 of the same width as the long board 3 is provided on the rotating plate 302 corresponding to the position of the long board 3; one end of the rotating shaft 301 passes through the outside of the transverse channel 1, and a connecting rod 304 is fixedly connected to the end, and the angle between the connecting rod 304 and the rotating plate 302 is 30°-60°; a movable groove 305 is provided in the middle of the connecting rod 304.

[0044] Please refer again Figure 5 As shown, one end of the first rotating plate 302 close to the mounting groove 102 is a conical structure that fits the bottom of the horizontal channel 1, and the other end is a right-angle structure. The remaining rotating plates 302 have one end a conical structure that fits the bottom of the horizontal channel 1, and the other end is a concave structure that fits the conical structure.

[0045] Please refer again Figure 4 As shown, a limiting frame 311 is provided on one side of the tapered portion of the transverse channel 1 corresponding to the rotating shaft 301 penetrating through the outer wall. The limiting frame 311 is composed of two intersecting triangular plates, a cross bar 103 and a semicircular plate. The corresponding cross bars 103 and the triangular plates are in the same plane, and the angle between the cross bar 103 and the inclined surface of the triangular plate is 30°-60°.

[0046] Please refer again Figure 4 and Figure 5As shown, a plurality of evenly distributed limit blocks 309 are fixedly connected to one side of the horizontal channel 1 close to the limit frame 311; a moving rod 306 is slidably arranged inside the limit blocks 309 in the same plane; one end of the moving rod 306 close to the limit frame 311 is rotatably connected to a roller 310, and the roller 310 abuts against the inclined surface on the limit frame 311; one end of the moving rod 306 away from the limit frame 311 is fixedly connected to a round rod 307; a spring 308 is sleeved on the round rod 307, and two ends of the spring 308 are respectively connected to the end of the moving rod 306 and the outermost limit block 309, so as to reset the moving rod 306.

[0047] The moving rod 306 in the same plane is disposed inside the movable groove 305 on the connecting rod 304 , and the moving rod 306 is rotatably connected to the lower end of the connecting rod 304 .

[0048] Please refer again Figure 2 and Figure 5 As shown, a telescopic cylinder 313 is fixedly arranged in the mounting groove 102, and the output end of the telescopic cylinder 313 penetrates the upper surface of the sealing plate 107; a connecting block 314 is fixedly arranged at the end of the output end of the telescopic cylinder 313, and a rod body 312 is fixedly arranged at the other end of the connecting block 314, and the lower end of the rod body 312 is connected to the semicircular plate on the limit frame 311.

[0049] A protective structure (not shown in the figure) is arranged outside the transverse channel 1, such as a cavity structure surrounded by bricks or steel plates, which is a prior art and will not be described in detail here.

[0050] Please refer again Figure 2 and Figure 6 As shown, a push plate 401 is slidably provided inside the transverse channel 1 at a position corresponding to the position below the blocking plate 4, and the shape of the push plate 401 matches the shape of the bottom of the transverse channel 1; a connecting rope 402 is provided in the middle of the push plate 401, and the connecting rope 402 is connected to each other at both ends to present a straight groove-shaped structure, and the two ends of the connecting rope 402 of the straight groove-shaped structure are respectively located inside the mounting groove 102 and the sewage discharge part 105; a through hole 403 with the same diameter as the connecting rope 402 is opened on the push plate 401, and the through hole 403 is slidably connected to the lower part of the connecting rope 402, and the upper part of the connecting rope 402 is fixedly connected to the push plate 401.

[0051] Please refer again Figure 6 and Figure 7As shown, the sewage discharge part 105 is internally rotatably connected with a first guide wheel 404, and the connecting rope 402 is rotatably connected to the first guide wheel 404; two shafts 409 are rotatably provided inside the mounting groove 102, one of which is rotatably connected with a second guide wheel 405, and the other shaft 409 is fixedly connected with a third guide wheel 406; an extrusion tooth 407 is fixedly connected between the second guide wheel 405 and the third guide wheel 406, and the connecting rope 402 is arranged between the two extrusion teeth 407; the second guide wheel 405 and the third guide wheel 406 are fixedly connected with meshing teeth 408 on both sides corresponding to the extrusion teeth 407, and the meshing teeth 408 are meshed with each other.

[0052] A motor 411 is fixedly disposed inside the mounting groove 102 , and a second sprocket 412 is fixedly disposed at the output end of the motor 411 ; a first sprocket 410 is fixedly connected to the shaft 409 , and a chain 413 is used to transmit power between the first sprocket 410 and the second sprocket 412 .

[0053] In order to facilitate understanding of the above technical solution of the present invention, the working principle or operation mode of the present invention in the actual process is described in detail below:

[0054] When constructing drainage channels on sloping farmland:

[0055] like Figure 1 As shown by the arrow in the figure (direction of water flow), a transverse channel 1 is constructed horizontally on the sloping farmland, so that most of the polluted water on the sloping farmland can flow and be collected in the transverse channel 1. The transverse channel 1 is constructed into a V-shaped structure with a cone pointing upward, so that the polluted water inside the transverse channel 1 can be concentrated to flow to both sides, and connected longitudinal channels 2 are constructed at both ends of the transverse channel 1, so that the collected polluted water can be concentrated to flow into the longitudinal channel 2.

[0056] It is worth noting here that when constructing the transverse channels 1, they need to be connected end to end in sequence to ensure that each transverse channel 1 presents a multi-channel folded structure after construction.

[0057] When preventing and controlling polluted water in sloping farmland:

[0058] First, plants that absorb nitrogen, phosphorus or pesticides in water are planted and cultivated in advance in the grass planting frame 104, and then the grass planting frame 104 is fixed to the upper part of the horizontal channel 1 or the longitudinal channel 2 through the cooperation of the horizontal bar 103 in the horizontal channel 1, and the plant roots extend from the holes at the bottom of the grass planting frame 104 to the inside of the horizontal channel 1 or the longitudinal channel 2. At this time, if the rainy season comes, the fertilizer on the sloping farmland will flow down the slope due to the erosion of rainwater. At this time, the horizontal channel 1 plays an intercepting role and collects the polluted water into the inside of the horizontal channel 1, and then transfers it to the inside of the longitudinal channel 2 to complete the collection of the polluted water.

[0059] At this time, the grass-planting frames 104 arranged on the upper parts of the horizontal channel 1 and the longitudinal channel 2 are planted with plants that can absorb nitrogen and phosphorus in sewage or pesticides in water bodies, so they can continuously absorb the enriched components in the polluted water, thereby purifying the water source and preventing and controlling surface pollution.

[0060] In addition, by setting a grass frame 104 on the upper part of the horizontal channel 1 and the vertical channel 2, plants can also be used to form a barrier wall to prevent plastic garbage and plant straw brought by rainwater from clogging the horizontal channel 1 or the vertical channel 2, affecting the circulation of polluted water and making it lose its prevention and control effect.

[0061] When preventing and controlling silt in longitudinal channel 2:

[0062] Since the plant isolation belt formed by the grass-planting frame 104 can only intercept large objects such as plastic garbage, the silt caused by rainwater erosion will still be carried and flowed into the horizontal channel 1 or the vertical channel 2.

[0063] At this time, due to the following factors, the silt flowing into the horizontal channel 1 will settle and will not flow into the vertical channel 2:

[0064] First, the plant isolation belt formed by the grass frame 104 slows down the water flow speed, preventing the polluted water from flowing quickly, so that the silt is carried by the polluted water to the subsequent longitudinal channel 2 or the water collection pool;

[0065] Second, because the horizontal channel 1 is built horizontally on the sloping farmland, the potential difference between the upper and lower parts is small, and the polluted water is intercepted horizontally, the flow rate of the polluted water is slowed down here, but because there is still a certain potential difference, the polluted water will flow slowly to the longitudinal channels 2 on both sides;

[0066] Third, since the depth of the horizontal channel 1 is greater than that of the longitudinal channel 2, and the longitudinal channel 2 is built at half the depth of the horizontal channel 1, when the polluted water carries sludge into the interior of the horizontal channel 1, the flow rate of the polluted water is slowed down, and the sludge in the polluted water settles, resulting in the separation of clean and polluted water. The sludge settles to the bottom of the horizontal channel 1, and the polluted water flows into the longitudinal channel 2.

[0067] Fourth, the limit frame 311 is moved upward by the cooperation of the telescopic cylinder 313, the connecting block 314 and the rod body 312. After the limit frame 311 is moved upward, the spring 308 exerts a force on the rod body 312 to make it slide toward the side of the limit frame 311. When sliding, all the connecting rods 304 are synchronously driven to rotate, thereby making all the rotating plates 302 rotate 90° counterclockwise around the rotating shaft 301. At this time, the rotating plates 302 are in an upright state, dividing the bottom space of the horizontal channel 1, and the polluted water cannot flow at the bottom. After the polluted water carries mud into the interior of the horizontal channel 1, it first enters the space surrounded by the dividing plate 106, and then naturally settles to form a clean and dirty diversion, and the polluted water flows into the longitudinal channel 2;

[0068] Fifth, even if part of the sludge is carried into the longitudinal channel 2 by the polluted water, since plants that can treat polluted water are also arranged in the longitudinal channel 2, the root system of the plants can block the flow of the sludge. When blockage occurs later, the operator can take out the grass frame 104 and treat the blocked sludge.

[0069] Through the above treatment plan, it is possible to prevent the soil on the sloping farmland from being washed away by rainwater, leading to soil erosion and non-point source pollution. It is also possible to prevent silt from blocking the flow of horizontal channel 1 or vertical channel 2, thereby affecting the effect of non-point source prevention and control.

[0070] When the sludge settled in the horizontal channel 1 is treated, the following sludge treatment steps are included:

[0071] A1: insert a partition 106 in the sewage discharge part 105 at the end of the outermost transverse channel 1, and remove the partition 106 in the sewage discharge part 105 at the end of the inner transverse channel 1, so that the outermost sewage discharge part 105 and the partition 106 form a three-dimensional enclosure space, and the innermost adjacent sewage discharge parts 105 together form a three-dimensional enclosure space;

[0072] A2: A mud pump is installed at the bottom of the multiple three-dimensional enclosure spaces formed;

[0073] A3: The rotating plate 302 is rotated 90° clockwise by the telescopic cylinder 313, so that all the rotating plates 302 are in a horizontal state, and the internal space of the horizontal channel 1 is divided into two parts, the upper and lower parts. During the rotation of the rotating plate 302, the settled sludge passes through the middle incision 303 and continues to stay at the bottom of the horizontal channel 1. After the rotating plate 302 completes the rotation, the sludge inside the horizontal channel 1 is separated under the rotating plate 302, and the rotating plate 302 cooperates with the long plate 3 to achieve the blocking of the incision 303;

[0074] A4: The shaft 409 is driven to rotate by the cooperation of the motor 411, the second sprocket 412, the first sprocket 410 and the chain 413. During the rotation of the shaft 409, the third guide wheel 406 is driven to rotate. At this time, since the third guide wheel 406 and the second guide wheel 405 are meshed and driven by the meshing teeth 408, the second guide wheel 405 can rotate synchronously with the third guide wheel 406. After that, since the two ends of the connecting rope 402 are respectively arranged on the first guide wheel 404 and the second guide wheel 405, the second guide wheel 405 and the third guide wheel 406 cooperate with the extrusion teeth 407 (such as Figure 7 As shown), the connecting rope 402 can be driven to rotate, so that the connecting rope 402 can drive the push plate 401 to reciprocate at the bottom of the horizontal channel 1;

[0075] During the movement of the push plate 401, the push plate 401 pushes the sludge at the bottom of the horizontal channel 1 to the outside and pushes the sludge into the sewage discharge part 105;

[0076] A5: Use a mud pump to remove the silt from the formed three-dimensional enclosure space and discharge it back onto the soil layer of the sloping cultivated land.

[0077] In step A4, the rotating plate 302 and the long plate 3 divide the internal space of the horizontal channel 1 into two parts, the upper and lower parts, and the sludge is separated in the lower part. Therefore, when the push plate 401 pushes the sludge to move, the rotating plate 302 arranged in the horizontal state can assist the push plate 401 to push the sludge to the sewage discharge part 105, so as to prevent the sludge from bulging during the pushing process.

[0078] At the same time, since the rotating plate 302 and the long plate 3 divide the internal space of the horizontal channel 1 into two parts, the upper space in the horizontal channel 1 and the rotating plate 302 form a shallow temporary water channel, which can be used for dredging during the process of sewage discharge to prevent non-point source pollution, so as to avoid blockage during the sewage discharge process of the horizontal channel 1, which affects the circulation of polluted water and further affects the non-point source prevention of sloping farmland.

[0079] In addition, since the upper part of the connecting rope 402 is fixedly connected to the push plate 401 and the lower part is slidably connected to the push plate 401, the stability of the push plate 401 can be improved by the upper and lower limit connecting rope 402 during the movement of the push plate 401 (a sleeve can be added to the sliding connection between the connecting rope 402 and the lower part of the push plate 401 to further increase the stability), and the sliding connection between the lower part of the connecting rope 402 and the push plate 401 can also be used to scrape off the sludge attached to the connecting rope 402 to avoid affecting the normal operation of the extrusion teeth 407.

[0080] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0081] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for preventing and controlling agricultural non-point source pollution on sloping cultivated land, characterized in that: The drainage unit comprises one or more drainage units; the drainage unit comprises a transverse channel (1) and a longitudinal channel (2); A cross bar (103) is fixedly connected to the inner wall of the cross channel (1); a grass planting frame (104) is arranged on the cross bar (103); A symmetrically arranged blocking plate (4) is fixedly connected to the middle of the transverse channel (1); the interior of the transverse channel (1) is divided by the blocking plate (4) to form a mounting groove (102); a sealing plate (107) of a matching shape is arranged on the upper part of the mounting groove (102); sewage discharge parts (105) formed by enclosure plates are arranged at both ends of the transverse channel (1); a push plate (401) is slidably arranged in the interior of the transverse channel (1) at a position corresponding to the bottom of the blocking plate (4); A long plate (3) is fixedly connected in the middle of the transverse channel (1), and the long plate (3) is located below the longitudinal channel (2); a plurality of evenly distributed rotating shafts (301) are rotatably connected to the long plate (3), and both ends of the rotating shafts (301) are rotatably connected to the side walls of the transverse channel (1); a rotating plate (302) is fixedly connected to the rotating shaft (301); a notch (303) having the same width as the long plate (3) is opened on the rotating plate (302) at a position corresponding to the long plate (3); A limiting frame (311) is provided on a side of the tapered portion of the transverse channel (1) corresponding to the rotation shaft (301) penetrating to the outer wall, the limiting frame (311) being composed of two intersecting triangular plates, a cross bar (103) and a semicircular plate, the cross bars (103) and the triangular plates corresponding to each other being in the same plane, and the angle between the cross bars (103) and the inclined surface of the triangular plates is 30°-60°; A telescopic cylinder (313) is fixedly arranged in the installation groove (102), and the output end of the telescopic cylinder (313) penetrates the upper surface of the sealing plate (107); a connecting block (314) is fixedly arranged at the end of the output end of the telescopic cylinder (313), and a rod body (312) is fixedly arranged at the other end of the connecting block (314), and the lower end of the rod body (312) is connected to the semicircular plate on the limiting frame (311); Two shafts (409) are rotatably arranged inside the installation groove (102), wherein one of the shafts (409) is rotatably connected to a second guide wheel (405), and the other shaft (409) is fixedly connected to a third guide wheel (406); An extrusion tooth (407) is fixedly connected between the second guide wheel (405) and the third guide wheel (406), and the connecting rope (402) is arranged between the two extrusion teeth (407); meshing teeth (408) are fixedly connected to both sides of the second guide wheel (405) and the third guide wheel (406) corresponding to the extrusion teeth (407), and the meshing teeth (408) mesh with each other; A motor (411) is also fixedly arranged inside the installation groove (102), and a second sprocket (412) is fixedly arranged at the output end of the motor (411); and a first sprocket (410) is fixedly connected to the shaft rod (409).

2. The device for preventing and controlling agricultural non-point source pollution on sloping cultivated land according to claim 1, characterized in that: A connecting rope (402) is provided in the middle of the push plate (401), and the connecting rope (402) is connected to each other at both ends to present a straight slot-shaped structure, and the two ends of the connecting rope (402) of the straight slot-shaped structure are respectively located inside the mounting groove (102) and the sewage discharge portion (105); a through hole (403) having a diameter equal to that of the connecting rope (402) is provided on the push plate (401), and the through hole (403) is slidably connected to the lower part of the connecting rope (402), and the upper part of the connecting rope (402) is fixedly connected to the push plate (401).

3. The device for preventing and controlling agricultural non-point source pollution on sloping cultivated land according to claim 2, characterized in that: A first guide wheel (404) is rotatably connected inside the sewage discharge portion (105), and the connecting rope (402) is rotatably connected to the first guide wheel (404).

4. The device for preventing and controlling agricultural non-point source pollution on sloping cultivated land according to claim 1, characterized in that: One end of the first rotating plate (302) close to the installation groove (102) presents a conical structure that fits the bottom of the horizontal channel (1), and the other end presents a right-angle structure, and the other end of the remaining rotating plates (302) presents a conical structure that fits the bottom of the horizontal channel (1) at one end, and a concave structure that fits the conical structure at the other end.

5. The device for preventing and controlling agricultural non-point source pollution on sloping cultivated land according to claim 1, characterized in that: One end of the rotating shaft (301) passes through the outside of the horizontal channel (1), and a connecting rod (304) is fixedly connected to the end of the rotating shaft (301). The angle between the connecting rod (304) and the rotating plate (302) is 30°-60°; a movable groove (305) is provided in the middle of the connecting rod (304).

6. The device for preventing and controlling agricultural non-point source pollution on sloping cultivated land according to claim 5, characterized in that: A plurality of evenly distributed limit blocks (309) are fixedly connected to one side of the transverse channel (1) close to the limit frame (311); a moving rod (306) is slidably disposed inside the limit blocks (309) in the same plane; One end of the moving rod (306) close to the limiting frame (311) is rotatably connected to a roller (310), and the roller (310) abuts against an inclined surface on the limiting frame (311); One end of the moving rod (306) away from the limiting frame (311) is fixedly connected to a round rod (307); a spring (308) is sleeved on the round rod (307), and two ends of the spring (308) are respectively connected to the end of the moving rod (306) and the outermost limiting block (309).

7. The device for preventing and controlling agricultural non-point source pollution on sloping cultivated land according to claim 6, characterized in that: The moving rod (306) in the same plane is arranged inside the movable groove (305) on the connecting rod (304), and the moving rod (306) is rotatably connected to the lower end of the connecting rod (304).

8. The device for preventing and controlling agricultural non-point source pollution on sloping cultivated land according to claim 1, characterized in that: The transverse channel (1) is of a V-shaped structure, with a conical portion arranged at the upper part of the sloping cultivated land. Two longitudinal channels (2) are arranged, and are connected to the transverse channel (1) through openings (101) at the ends of the transverse channel (1). The transverse channel (1) is deeper, while the longitudinal channel (2) is shallower, and the longitudinal channel (2) is connected to the transverse channel (1) at half the depth.

9. A method for preventing and controlling agricultural non-point source pollution on sloping cultivated land, applicable to the device for preventing and controlling agricultural non-point source pollution on sloping cultivated land as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: S1: constructing a transverse channel (1) on the sloping farmland, and constructing connecting longitudinal channels (2) at both ends of the transverse channel (1), so that the transverse channels (1) are connected end to end in sequence, ensuring that each transverse channel (1) presents a multi-channel folded structure after construction; Inserting a partition plate (106) in the sewage discharge portion (105) at the end of the outermost transverse channel (1), and removing the partition plate (106) from the sewage discharge portion (105) at the end of the inner transverse channel (1); S2: placing a grass frame (104) planted with plants in advance in the horizontal channel (1), and purifying the polluted water through plants that can absorb nitrogen, phosphorus or pesticides in the water body; The plant isolation belt formed on the grass planting frame (104) intercepts large objects and slows down the water flow speed; S3: The rotating plates (302) are rotated 90° clockwise by the telescopic cylinder (313), so that all the rotating plates (302) are in a horizontal state, and the internal space of the horizontal channel (1) is divided into two parts, an upper part and an lower part. During the rotation of the rotating plates (302), the settled sludge continues to remain at the bottom of the horizontal channel (1); S4: The motor (411) drives the third guide wheel (406) to rotate via the shaft (409), and the second guide wheel (405) rotates synchronously with the third guide wheel (406). Then, the connecting rope (402) is driven to rotate by the cooperation of the squeezing teeth (407) on the second guide wheel (405) and the third guide wheel (406), so that the connecting rope (402) can drive the push plate (401) to push the sludge at the bottom of the horizontal channel (1) toward the inside of the sewage discharge part (105) on the outside; S5: Use a mud pump to remove the silt from the formed three-dimensional enclosure space and discharge it back onto the soil layer of the sloping cultivated land.

10. The method for preventing and controlling agricultural non-point source pollution on sloping cultivated land according to claim 9, characterized in that: In the step S4, the rotating plate (302) and the long plate (3) separate the internal space of the transverse channel (1) into two parts, an upper part and an lower part, and the sludge is separated into the lower part; the upper space in the transverse channel (1) and the rotating plate (302) form a shallow temporary water channel.

Images