A debris filtration device for irrigation canals in farmland water conservancy projects

Abstract

This utility model discloses a debris filtration device for irrigation canals in farmland water conservancy projects, relating to the field of farmland water conservancy engineering technology. It includes an irrigation canal with a filter plate installed at the upper end inside the canal. The filter plate extends outward from the canal, and three mounting ears are evenly fixedly connected to each of the left and right sides of the filter plate. This utility model, through the coordinated use of an irrigation canal, filter plate, mounting ears, filter holes, movable groove, debris removal device, cleaning assembly, control mechanism, and squeezing groove, solves the problem of debris such as fallen leaves and straw easily entering and accumulating with rainwater during long-term operation of irrigation canals, leading to water pollution and canal blockage. It also solves the problems of existing filter plates where debris accumulation clogs the filter holes, causing water accumulation or downstream water shortages, and the high cost and untimely impact on water delivery associated with manual cleaning.

Description

Technical Field

[0001] This utility model relates to the field of farmland water conservancy engineering technology, specifically to a debris filtration device for water channels in farmland water conservancy engineering. Background Technology

[0002] As an important infrastructure for agricultural production, farmland water conservancy projects undertake the key functions of farmland irrigation, drainage and flood control, and rational allocation of water resources. They are the core support for ensuring crop growth and improving agricultural production efficiency and stability. In the farmland water conservancy system, canals are the core channels for water resource transportation. Their operation directly affects the efficiency of the entire water conservancy system. Through canals, water from reservoirs, rivers and other sources can be accurately delivered to the fields to meet the irrigation needs of different crops at different growth stages. At the same time, they can quickly drain waterlogged fields during the rainy season to avoid waterlogging damage to crop roots. They play an irreplaceable role in maintaining agricultural ecological balance and ensuring food security. However, during the long-term operation of the irrigation canals, due to the influence of the natural environment and field operations, a large amount of debris, such as fallen leaves from trees around the farmland, crop stalks, weed residues, and garbage, is easily washed away by rainwater or falls naturally into the canals. Over time, this accumulation not only pollutes the water but also easily blocks the canal channels. In addition, the existing system only uses filter plates, and over time, the debris isolated by the filter plates will accumulate on the surface of the filter plates, gradually clogging the filter holes. This prevents rainwater and surrounding water from flowing smoothly into the canals through the filter plates, which can lead to water accumulation or water shortages due to untimely downstream transport. If the debris on the filter plates is cleaned manually on a regular basis, it will not only consume a lot of manpower and time, but also affect the normal water transport of the canals if the cleaning is not done in time. Utility Model Content

[0003] To address the problems mentioned in the background art, the purpose of this utility model is to provide a debris filtration device for irrigation canals in farmland water conservancy projects. This device filters debris from the canals and uses hydraulic power to clean residual debris from the filter plates, requiring no additional energy or excessive manual intervention. It improves or solves, to a certain extent, the problem that during long-term operation of irrigation canals, due to the influence of the natural environment and field operations, a large amount of debris, such as fallen leaves from trees around the farmland, crop straw, weed residue, and garbage, easily gets washed away by rainwater or falls naturally into the canals, accumulating over time. This not only pollutes the water but also easily clogs the canal channels. Furthermore, existing methods only use filter plates, and over time, the debris isolated by the filter plates accumulates on the surface, gradually clogging the filter holes. This prevents rainwater and surrounding water from smoothly entering the canal through the filter plates, leading to water accumulation or water shortages downstream. Relying on manual cleaning of the debris on the filter plates periodically not only consumes a lot of manpower and time but also, if cleaning is not done in a timely manner, will still affect the normal water transport of the canal.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a debris filtration device for a farmland irrigation canal, comprising a canal, a filter plate provided at the upper end of the canal, the upper side of the filter plate extending out of the canal, three mounting ears evenly fixedly connected to each of the left and right sides of the filter plate, all six mounting ears being fixedly connected to the upper side of the canal, a plurality of filter holes evenly opened on the surface of the filter plate, movable grooves respectively opened on the front and rear sides of the upper surface of the filter plate, two of the movable grooves penetrating into the canal, and a debris removal device provided at the upper end of the canal, the debris removal device being fixedly connected to the filter plate; The impurity removal device includes a cleaning component and a control mechanism. The cleaning component is disposed at the upper end of the filter plate, and the control mechanism is disposed at the lower end of the filter plate and is fixedly connected to the filter plate.

[0005] In a preferred embodiment of this utility model, the cleaning assembly includes a trapezoidal scraper, connecting rods, a limiting plate, and a push plate. The trapezoidal scraper is disposed above the filter plate and contacts the upper surface of the filter plate, and is slidably connected to the filter plate. There are two connecting rods, which are respectively fixedly connected to the front and rear ends of the lower surface of the trapezoidal scraper. The lower ends of the two connecting rods extend to the lower side of the filter plate through the two movable grooves. The limiting plate is fixedly connected to the lower ends of the two connecting rods, and the push plate is fixedly connected to the top end of the trapezoidal scraper.

[0006] As a preferred embodiment of this invention, the lower surface of the limiting plate is provided with an extrusion groove.

[0007] In a preferred embodiment of the present invention, the control mechanism includes a reciprocating assembly and a hydraulic drive component, wherein the reciprocating assembly is disposed directly below the extrusion groove, and the hydraulic drive component is disposed at the lower end of the reciprocating assembly.

[0008] In a preferred embodiment of this invention, the reciprocating assembly includes a sealing box, a support plate, a rotating rod, a crank handle, a pressure rod, and a worm gear. The sealing box is located below the extrusion groove. There are two support plates, which are respectively fixedly connected to the front and rear surfaces of the sealing box. The upper ends of the two support plates, which are located away from each other, are fixedly connected to the lower surface of the filter plate. The rotating rod is located inside the sealing box, and both its upper and lower ends are rotatably connected to the sealing box, with its upper end extending out of the sealing box. The crank handle is sleeved on the upper surface of the rotating rod and fixedly connected to it. The pressure rod is fixedly connected to the front side of the crank handle, and its upper end is located inside the extrusion groove and movably connected to it. The worm gear is located inside the sealing box, sleeved on the lower surface of the rotating rod, and fixedly connected to it.

[0009] In a preferred embodiment of this utility model, the hydraulic drive component includes a worm, sleeves, and paddles. The worm is disposed at the lower end inside the sealing box and located behind the worm wheel, and is meshed with the worm wheel. The left and right ends of the worm extend out of the sealing box and are rotatably connected to the sealing box. There are two sleeves, which are respectively sleeved on the left and right end surfaces of the worm and fixedly connected to the worm. There are several paddles, which are evenly fixedly connected to the circumference of the two sleeves.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model, through the coordinated use of a water channel, filter plate, mounting ears, filter holes, movable groove, impurity removal device, cleaning component, trapezoidal scraper, connecting rod, limit plate, push plate, control mechanism, reciprocating component, sealing box, support fixing plate, rotating rod, crank handle, pressure rod, worm gear, hydraulic drive component, worm, sleeve, slurry plate, and extrusion groove, improves or solves, to a certain extent, the problem of large amounts of debris, such as fallen leaves from trees around farmland, crop straw, weed residues, and garbage, easily carried by rainwater during long-term operation of the water channel due to the influence of the natural environment and field operations. Water washed or naturally falls into the canal and accumulates there over time, polluting the water and clogging the canal. In addition, existing systems only use filter plates, which accumulate debris over time, gradually clogging the filter holes. This prevents rainwater and surrounding water from flowing smoothly into the canal, leading to waterlogging or water shortages due to delayed downstream transport. Relying on manual cleaning of the filter plates is not only labor-intensive and time-consuming, but also affects the normal water transport of the canal if cleaning is not done in a timely manner.

[0011] 2. This utility model can remove debris by setting a scraping component that can closely fit the surface of the filter plate. At the same time, the push plate enhances the cleaning effect of accumulated debris. The linkage and the movable groove can also ensure that the cleaning action is stable and does not deviate, thus ensuring that the filter holes are continuously unobstructed.

[0012] 3. This utility model can achieve automatic drive by setting up a control mechanism and using the power of water flow in the water channel. No additional energy is required. Moreover, the reciprocating component and the hydraulic drive component work together stably and can transmit power to drive the cleaning component to operate, ensuring the cleaning efficiency of the filter plate and the overall stability of the device. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the debris filtration device of this utility model; Figure 2 This is an exploded three-dimensional structural diagram of the filter plate; Figure 3 An exploded three-dimensional structural diagram of the cleaning and scraping assembly; Figure 4This is a schematic diagram of the three-dimensional structure of the control mechanism in an explosion.

[0014] In the diagram: 1. Water channel; 2. Filter plate; 3. Mounting ear; 4. Filter hole; 5. Movable groove; 6. Impurity removal device; 7. Scraping assembly; 71. Trapezoidal scraper; 72. Connecting rod; 73. Limiting plate; 74. Push plate; 8. Control mechanism; 81. Reciprocating assembly; 811. Sealing box; 812. Support fixing plate; 813. Rotating rod; 814. Handle; 815. Pressure rod; 816. Worm gear; 82. Hydraulic drive component; 821. Worm; 822. Sleeve; 823. Slurry plate; 9. Extrusion groove. Detailed Implementation

[0015] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0016] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0017] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0018] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0019] Example 1 Reference Figure 1-4 This is the first embodiment of the present invention, which provides a debris filtration device for irrigation canals in farmland water conservancy projects. The device includes a canal 1, a filter plate 2 is provided at the upper end of the canal 1, the upper side of the filter plate 2 extends out of the canal 1, three mounting ears 3 are evenly fixedly connected to each of the left and right sides of the filter plate 2, and all six mounting ears 3 are fixedly connected to the upper side of the canal 1. A plurality of filter holes 4 are evenly opened on the surface of the filter plate 2, and movable grooves 5 are respectively opened on the front and rear sides of the upper surface of the filter plate 2. Both movable grooves 5 penetrate into the interior of the canal 1. A debris removal device 6 is provided at the upper end of the interior of the canal 1, and the debris removal device 6 is fixedly connected to the filter plate 2. The impurity removal device 6 includes a cleaning component 7 and a control mechanism 8. The cleaning component 7 is located at the upper end of the filter plate 2, and the control mechanism 8 is located at the lower end of the filter plate 2 and is fixedly connected to the filter plate 2.

[0020] Specifically, the device achieves basic filtration of impurities through filter plate 2, and is equipped with impurity removal device 6 to automatically clean residual impurities from filter plate 2. This effectively prevents blockage of water channel 1 and water pollution, and requires no additional energy, reducing manpower and operating costs, and ensuring the water conveyance efficiency and water quality safety of water channel 1.

[0021] Furthermore, the filter plate 2 is fixed to the upper end of the water channel 1 by the mounting ears 3 to intercept debris. The control mechanism 8 drives the cleaning component 7 with the help of water flow power, and drives the cleaning component to slide back and forth along the movable groove 5 of the filter plate 2 to clean the debris to both sides of the filter plate 2, so as to realize the coordinated operation of filtration and automatic cleaning.

[0022] Example 2 In the second embodiment of this utility model, the cleaning and scraping assembly 7 includes a trapezoidal scraper 71, a connecting rod 72, a limiting plate 73, and a push plate 74. The trapezoidal scraper 71 is disposed above the filter plate 2 and contacts the upper surface of the filter plate 2 and is slidably connected to the filter plate 2. There are two connecting rods 72, which are respectively fixedly connected to the front and rear ends of the lower surface of the trapezoidal scraper 71. The lower ends of the two connecting rods 72 extend to the lower side of the filter plate 2 through two movable grooves 5. The limiting plate 73 is fixedly connected to the lower ends of the two connecting rods 72, and the push plate 74 is fixedly connected to the top end of the trapezoidal scraper 71. The lower surface of the limiting plate 73 is provided with an extrusion groove 9.

[0023] Specifically, by setting up the cleaning component 7, it can closely adhere to the surface of the filter plate 2 to remove debris. At the same time, the push plate 74 enhances the cleaning effect of accumulated debris. Furthermore, the cooperation between the connecting rod 72 and the movable groove 5 ensures that the cleaning action is stable and does not deviate, thus ensuring that the filter holes 4 remain unobstructed.

[0024] Furthermore, when the control mechanism 8 transmits reciprocating power to the limiting plate 73, the limiting plate 73 receives the driving force through the squeezing groove 9 and drives the two connecting rods 72 to reciprocate along the movable groove 5 of the filter plate 2. The connecting rods 72 simultaneously drive the trapezoidal scraper 71 at the upper end to slide on the upper surface of the filter plate 2. The trapezoidal scraper 71 adheres to the filter plate 2 and scrapes the residual debris to both sides. The push plate 74 at its top further pushes the debris accumulated during the scraping process, ultimately causing the debris to leave the filter hole 4 area and preventing the filter hole 4 from being blocked.

[0025] Example 3 In the third embodiment of this utility model, the control mechanism 8 includes a reciprocating component 81 and a hydraulic drive component 82. The reciprocating component 81 is disposed directly below the extrusion groove 9, and the hydraulic drive component 82 is disposed at the lower end of the reciprocating component 81. The reciprocating assembly 81 includes a sealing box 811, a support plate 812, a rotating rod 813, a rocker arm 814, a pressure rod 815, and a worm gear 816. The sealing box 811 is located below the extrusion groove 9. There are two support plates 812, which are fixedly connected to the front and rear surfaces of the sealing box 811 respectively. The upper ends of the two support plates 812, which are far apart from each other, are fixedly connected to the lower surface of the filter plate 2. The rotating rod 813 is located inside the sealing box 811, and both its upper and lower ends are rotatably connected to the sealing box 811, with the upper end extending out of the sealing box 811. The rocker arm 814 is sleeved on the upper surface of the rotating rod 813 and is fixedly connected to the rotating rod 813. The pressure rod 815 is fixedly connected to the front side of the rocker arm 814, and its upper end is located inside the extrusion groove 9 and is movably connected to the extrusion groove 9. The worm gear 816 is located inside the sealing box 811, sleeved on the lower surface of the rotating rod 813, and is fixedly connected to the rotating rod 813. The hydraulic drive component 82 includes a worm 821, sleeves 822, and paddles 823. The worm 821 is located at the lower end inside the sealing box 811 and is positioned behind the worm wheel 816, and is meshed with the worm wheel 816. The left and right ends of the worm 821 extend out of the sealing box 811 and are rotatably connected to the sealing box 811. There are two sleeves 822, which are respectively fitted onto the left and right end surfaces of the worm 821 and are fixedly connected to the worm 821. There are several paddles 823, which are evenly fixedly connected to the circumference of the two sleeves 822.

[0026] Specifically, by setting up the control mechanism 8, automatic drive can be achieved by using the water flow power of the water channel 1 without the need for additional energy. Moreover, the reciprocating component 81 and the hydraulic drive component 82 work stably together and can transmit power to drive the cleaning component 7 to operate, ensuring the cleaning efficiency of the filter plate 2 and the overall stability of the device.

[0027] Furthermore, the water flow in the channel 1 impacts the slurry plate 823 of the hydraulic drive component 82, causing the sleeve 822 and the worm gear 821 to rotate synchronously. The worm gear 821 meshes with the worm wheel 816 in the sealing box 811 of the reciprocating assembly 81, driving the worm wheel 816 and the rotating rod 813 to rotate. The rotating rod 813 drives the upper handle 814 to move in a circular motion, causing the pressure rod 815 to periodically squeeze in the squeezing groove 9 of the limiting plate 73, pushing the limiting plate 73 to move back and forth, thereby providing stable reciprocating power for the cleaning assembly 7 and realizing the cleaning of debris from the filter plate 2.

[0028] Working principle: When in use, the filter plate 2 should be fixed to the upper opening of the water channel 1 through the three mounting ears 3 on each of its left and right sides. At this time, the filter holes 4 evenly distributed on the surface of the filter plate 2 can directly intercept the fallen leaves, straw fragments, weed residues and other debris from the outside, and initially complete the water filtration, avoiding large debris from directly entering the water channel 1 and causing deep blockage. When water channel 1 is in use and water flows within it, the water flow preferentially impacts the paddle plate 823 of the hydraulic drive component 82 in the control mechanism 8. Since the paddle plate 823 is uniformly fixed on the circumferential surface of the two sleeves 822, and the sleeves 822 are fixedly connected to the worm gear 821, the impact force of the water flow will drive the paddle plate 823 to rotate around the axis of the worm gear 821, thereby driving the worm gear 821 to rotate synchronously. The worm gear 821 is located at the lower end of the sealing box 811 inside the reciprocating assembly 81, and is connected to the sealing box 811. The worm gear 816 inside the worm 821 is engaged, so the rotation of the worm 821 will drive the rotation of the worm gear 816. The worm gear 816 is sleeved on the lower end of the rotating rod 813 and fixed to the rotating rod 813, so that the rotating rod 813 rotates together with the worm gear 816 in the sealed box 811. The upper end of the rotating rod 813 extends out of the sealed box 811, and a crank handle 814 is sleeved and fixed on its surface. When the rotating rod 813 rotates, it will drive the crank handle 814 to make a circular motion around the rotating rod 813. The pressure rod fixed to the front of the crank handle 814 The upper end of the pressure rod 815 is embedded in the extrusion groove 9 on the lower surface of the limiting plate 73. During the circular motion of the crank handle 814, the pressure rod 815 will periodically extrude on the inner wall of the extrusion groove 9, thereby driving the limiting plate 73 to move back and forth. The limiting plate 73 is fixedly connected to the lower ends of the two connecting rods 72 in the cleaning assembly 7. The upper ends of the connecting rods 72 pass through the movable grooves 5 on the front and rear sides of the filter plate 2 and are fixed to the trapezoidal scraper strip 71 on the upper surface of the filter plate 2. The movable grooves 5 can precisely limit the movement direction of the connecting rods 72. To prevent the trapezoidal scraper 71 from deviating during sliding, the reciprocating motion of the limiting plate 73 is transmitted to the trapezoidal scraper 71 through the connecting rod 72, causing the trapezoidal scraper 71 and the push plate 74 to slide back and forth along the upper surface of the filter plate 2. The lower surface of the trapezoidal scraper 71 is always in close contact with the filter plate 2, which can continuously scrape the debris remaining on the filter plate 2 to the left and right sides of the filter plate 2. The push plate 74 can push the accumulated debris, ultimately causing the debris to leave the filter plate 2 and the filter hole 4 area, avoiding clogging of the filter hole 4. Throughout the process, the water filtered by the filter plate 2 can smoothly enter the main channel of the water channel 1 through the filter holes 4, ensuring water delivery efficiency. Moreover, the cleaning action of the trapezoidal scraper 71 is entirely driven by the water flow in the water channel 1 itself, without the need for additional external power supply or manual intervention. This ensures that the filter holes 4 are unobstructed, greatly reducing the problem of filter hole 4 blockage, and also reduces the manpower and energy costs of the device operation.

[0029] In summary, by using the combined components of water channel 1, filter plate 2, mounting ear 3, filter hole 4, movable groove 5, impurity removal device 6, cleaning and scraping assembly 7, trapezoidal scraper 71, connecting rod 72, limit plate 73, push plate 74, control mechanism 8, reciprocating assembly 81, sealing box 811, support and fixing plate 812, rotating rod 813, crank handle 814, pressure rod 815, worm gear 816, hydraulic drive component 82, worm 821, sleeve 822, slurry plate 823, and extrusion groove 9, the system can filter impurities in the water channel and clean residual impurities on the filter plate using hydraulic power, without requiring additional energy or excessive manual intervention.

[0030] The sealing box 811, worm gear 816, and worm 821 used in this application can be additionally equipped with protective measures of common knowledge in this technical field under different usage environments, including but not limited to the following methods, such as protective covers for equipment protection, dustproof nets for equipment dust prevention, and sealing components or waterproof coatings for equipment waterproofing, which are commonly used by those skilled in the art.

[0031] It should be noted that the sealing box 811, worm gear 816, and worm 821 are existing devices or equipment, or devices or equipment that can be implemented by existing technology. The power supply, connection method, usage method, power source, fixing method, installation method, control method, etc. of the equipment, as well as the materials of each accessory and the selection of various parameters are common knowledge to those skilled in the art, and therefore will not be described in detail in this application document.

[0032] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0033] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0034] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A debris filtration device for a water channel in a farmland irrigation project, comprising a water channel (1), characterized in that: A filter plate (2) is provided at the upper end of the water channel (1). The water channel (1) extends from the upper side of the filter plate (2). Three mounting ears (3) are evenly fixedly connected to each of the left and right sides of the filter plate (2). All six mounting ears (3) are fixedly connected to the upper side of the water channel (1). A number of filter holes (4) are evenly opened on the surface of the filter plate (2). Movable grooves (5) are opened on the front and back sides of the upper surface of the filter plate (2). Both of the movable grooves (5) penetrate into the water channel (1). A dirt removal device (6) is provided at the upper end of the water channel (1). The dirt removal device (6) is fixedly connected to the filter plate (2). The impurity removal device (6) includes a cleaning component (7) and a control mechanism (8). The cleaning component (7) is located on the upper end of the filter plate (2), and the control mechanism (8) is located on the lower end of the filter plate (2) and is fixedly connected to the filter plate (2).

2. The debris filtration device for irrigation canals in farmland water conservancy projects according to claim 1, characterized in that: The cleaning assembly (7) includes a trapezoidal scraper (71), connecting rods (72), a limiting plate (73), and a push plate (74). The trapezoidal scraper (71) is disposed above the filter plate (2) and contacts the upper surface of the filter plate (2) and is slidably connected to the filter plate (2). There are two connecting rods (72), which are fixedly connected to the front and rear ends of the lower surface of the trapezoidal scraper (71). The lower ends of the two connecting rods (72) extend to the lower side of the filter plate (2) through the two movable grooves (5). The limiting plate (73) is fixedly connected to the lower ends of the two connecting rods (72). The push plate (74) is fixedly connected to the top of the trapezoidal scraper (71).

3. A debris filtration device for irrigation canals in farmland water conservancy projects according to claim 2, characterized in that: The lower surface of the limiting plate (73) is provided with an extrusion groove (9).

4. A debris filtration device for irrigation canals in farmland water conservancy projects according to claim 3, characterized in that: The control mechanism (8) includes a reciprocating assembly (81) and a hydraulic drive (82). The reciprocating assembly (81) is located directly below the extrusion groove (9), and the hydraulic drive (82) is located at the lower end of the reciprocating assembly (81).

5. A debris filtration device for irrigation canals in farmland water conservancy projects according to claim 4, characterized in that: The reciprocating assembly (81) includes a sealing box (811), a support fixing plate (812), a rotating rod (813), a rocker arm (814), a pressure rod (815), and a worm gear (816). The sealing box (811) is located below the extrusion groove (9). There are two support fixing plates (812), which are respectively fixedly connected to the front and rear surfaces of the sealing box (811). The upper ends of the two support fixing plates (812) that are far apart from each other are fixedly connected to the lower surface of the filter plate (2). The rotating rod (813) is located inside the sealing box (811). Both ends are rotatably connected to the sealing box (811), and the upper end extends out of the sealing box (811). The rocker arm (814) is sleeved on the upper surface of the rotating rod (813) and fixedly connected to the rotating rod (813). The pressure rod (815) is fixedly connected to the front side of the rocker arm (814), and its upper end is set inside the extrusion groove (9) and movably connected to the extrusion groove (9). The worm gear (816) is set inside the sealing box (811), and sleeved on the lower surface of the rotating rod (813) and fixedly connected to the rotating rod (813).

6. A debris filtration device for irrigation canals in farmland water conservancy projects according to claim 5, characterized in that: The hydraulic drive component (82) includes a worm (821), sleeves (822), and paddles (823). The worm (821) is located at the lower end inside the sealing box (811) and behind the worm wheel (816), and is meshed with the worm wheel (816). The left and right ends of the worm (821) extend out of the sealing box (811) and are rotatably connected to the sealing box (811). There are two sleeves (822), which are respectively sleeved on the left and right end surfaces of the worm (821) and fixedly connected to the worm (821). There are several paddles (823), which are evenly fixedly connected to the circumference of the two sleeves (822).

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