A high-standard farmland water-saving irrigation system

Abstract

The present invention discloses a high-standard farmland water-saving irrigation system, belonging to the field of irrigation systems, including a diversion cylinder. The lower end of the diversion cylinder is fixedly connected with a separation cylinder. The outer surface of the lower end of the separation cylinder is fixedly connected with a connecting pipe. The outer surface of the connecting pipe is fixedly connected with an aggregate box. A flow-blocking component for blocking the backflow of sediment is arranged inside the connecting pipe. The flow-blocking component includes a fixing frame fixedly connected with the inner surface of the connecting pipe. A movable plate is hinged to the inner surface of the connecting pipe below the fixing frame. The movable plate is in a fan-shaped structure. By setting the flow-blocking component, the movable plate will re-gather from a dispersed state, and the inside of the connecting pipe is sealed by the movable plate, so as to effectively prevent the sediment from flowing upwards, thereby reducing the probability of the sediment mixing with the water flow again, ensuring the water flow filtration quality, and effectively improving the stability of the water flow filtration system.

Description

Technical Field

[0001] The present invention relates to the field of irrigation systems, and more specifically, to a water-saving irrigation system for high-standard farmland. Background Art

[0002] Farmland irrigation systems are a crucial part of agricultural production, playing a key role in ensuring crop growth and yield. Its main equipment includes water pumps, water conveyance pipelines, filtering equipment, sprinkler irrigation systems, etc. The water sources for farmland irrigation systems are usually wells, rivers, etc. The water in wells and rivers contains sand and gravel. In order to avoid clogging of irrigation nozzles by sediment in the water, it is usually necessary to use a filtering device to filter the sand and gravel in the water;

[0003] Filtering devices are an important part of ensuring the normal operation of irrigation systems and improving water resource utilization efficiency. Irrigation system filtering devices mainly include sand filters, centrifugal filters, and disc filters, etc. For example, Chinese Patent No. CN222173392U discloses a centrifugal filtering device for water-saving irrigation. The stirring blades are driven by a rotating rod to stir the water inside it, so that the water is in full contact with the inner wall of the sedimentation tank. The lead screw drives the moving ring to move back and forth, so that the moving ring can scrape the impurities on the inner wall of the sedimentation tank into the water, thus facilitating the cleaning of the inner wall of the filter and helping to reduce the cleaning difficulty of the filter;

[0004] The main principle of the centrifugal filtering device in the prior art is that the water flow rotates to generate centrifugal force, which pushes the sediment and solid particles with higher density to move along the pipe wall to form a swirling flow, so that the sand and solid particles enter the sand collection tank, while the purified water flows out along the water outlet along the flow, realizing the separation of water and sand. However, when the filter starts and stops and when the water inflow changes, the water flow velocity and pressure inside the filter will change, causing the sand and gravel that have been deposited in the sand collection tank to be re-lifted and returned to the filter along with the water flow, resulting in sand and gravel backflow. This will not only affect the water flow filtering efficiency, but also increase the probability of sediment clogging of the irrigation nozzle, thus having an adverse impact on the operation stability of the farmland irrigation system. Summary of the Invention

[0005] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a water-saving irrigation system for high-standard farmland. By setting a flow-blocking component, the movable plate will re-gather from a dispersed state, and the inside of the connecting pipe is sealed by the movable plate, so as to effectively prevent the sediment from flowing back upward, thereby reducing the probability of the sediment mixing with the water flow again, ensuring the water flow filtering quality, and effectively improving the stability of the water flow filtering system.

[0006] To solve the above problems, the present invention adopts the following technical solutions.

[0007] A high-standard farmland water-saving irrigation system includes a diversion cylinder. The lower end of the diversion cylinder is fixedly connected with a separation cylinder. The outer surface of the lower end of the separation cylinder is fixedly connected with a connecting pipe. An aggregate box is fixedly connected to the outer surface of the connecting pipe. A flow-blocking component for preventing sediment backflow is arranged inside the connecting pipe.

[0008] The flow-blocking component includes a fixed frame fixedly connected to the inner surface of the connecting pipe. An activity plate is hinged to the inner surface of the connecting pipe below the fixed frame. The activity plate is in a fan-shaped structure. The number of the activity plates is multiple and they are distributed in a circular array. Traction ropes are fixedly connected to the outer surfaces of the upper ends of the multiple activity plates. The upper ends of the traction ropes are fixedly connected to the outer surface of the lower end of the fixed frame. A fixed cylinder is fixedly connected to the lower side of the outer surface of the connecting pipe. The lower end of the fixed cylinder is fixedly connected to the inner surface of the lower end of the aggregate box.

[0009] Furthermore, the lower end of the connecting pipe is communicated with the inside of the fixed cylinder. An outlet pipe is fixedly connected to the outer surface of the upper end of the diversion cylinder. A water inlet pipe is fixedly connected to the rear side of the outer surface of the diversion cylinder. The diversion cylinder is connected to a water pump through the water inlet pipe. An isolation cover is fixedly connected to the inner surface of the upper end of the diversion cylinder. Both the upper and lower ends of the isolation cover are open.

[0010] Furthermore, a backflow component is arranged outside the fixed cylinder. The backflow component includes a screen fixedly connected to the outer surface of the fixed cylinder. The screen is in a circular ring shape. A filter screen is fixedly connected to the inner surface of the upper end of the aggregate box. A diversion plate is fixedly connected to the outer surface of the lower end of the filter screen. An overflow groove is formed in the outer surface of the connecting pipe. The number of the overflow grooves is multiple and they are distributed in a circular array. The lower end of the diversion plate is located below the overflow groove.

[0011] Furthermore, a sealing component is arranged inside the connecting pipe. The sealing component includes activity grooves formed in the inner surface of the connecting pipe. The number of the activity grooves is two and they are symmetrically distributed. Activity blocks are slidably connected to the inner sides of the two activity grooves. An extrusion pipe is fixedly connected between the two activity blocks. The extrusion pipe is in a hollow circular ring shape. The extrusion pipe is located below the activity plate.

[0012] Furthermore, a top plate is fixedly connected to the outer surface of the extrusion pipe. The top plate is distributed in a circular ring shape. A sealing curtain is fixedly connected to the inner surface of the connecting pipe below the overflow groove. The number of the sealing curtains is multiple and they are distributed in a circular array. The top plate is located directly below the sealing curtain. The sealing curtain is made of a flexible material.

[0013] Further, a discharge assembly is arranged inside the fixed cylinder. The discharge assembly includes a sealing plate fixedly connected to the inner surface of the fixed cylinder. An installation groove is formed on the outer surface of the upper end of the sealing plate. A movable rod is fixedly connected to the inner surface of the installation groove. A flap is rotatably connected to the outer surface of the movable rod. A buffer plate is fixedly connected to the right side of the outer surface of the lower end of the connecting pipe. A pull bar is fixedly connected to the outer surface of the lower end of the flap. The lower end of the pull bar is fixedly connected to the inner surface of the lower end of the aggregate box. The pull bar is made of an elastic material.

[0014] Further, guide grooves are formed on the outer surface of the upper end of the flap. The number of the guide grooves is two groups and they are distributed in parallel. A scraper is slidably connected to the inner side of the guide grooves. The scraper is in a U-shaped structure. The outer surface of the lower end of the scraper is in sliding contact with the upper end of the flap. A limiting plate is fixedly connected to the left side of the inner surface of the fixed cylinder. The limiting plate is located below the sealing plate.

[0015] Further, a baffle curtain is fixedly connected to the lower end of the inner surface of the fixed cylinder. The number of the baffle curtains is two groups and they are symmetrically distributed on the front and back sides of the flap. The baffle curtain is made of a flexible material. A fixing rod is fixedly connected between the two baffle curtains.

[0016] Further, a cable is fixedly connected to the middle of the outer surface of the baffle curtain. A receiving plate is fixedly connected to the outer surface of the cable. The cable is made of an elastic material. The receiving plate is located directly below the connecting pipe. The baffle curtain is in an arc shape.

[0017] Further, a sand discharge port is formed on the left side of the outer surface of the fixed cylinder. A sewage discharge pipe is fixedly connected to the left side of the outer surface of the aggregate box. A gate valve is fixedly connected to the inner surface of the sewage discharge pipe. The buffer plate is in an arc shape. The separation cylinder is in a conical shape.

[0018] Compared with the prior art, the advantages of the present invention are as follows:

[0019] (1) In this solution, by setting the flow blocking assembly, the movable plates will re-gather from the dispersed state. The inner part of the connecting pipe is sealed by the movable plates, so as to effectively prevent the sediment from flowing back upwards, thereby reducing the probability of the sediment mixing with the water flow again, ensuring the water flow filtration quality, and effectively improving the stability of the water flow filtration system;

[0020] (2) In this solution, by setting the sealing assembly, the movable plates are made to gather more tightly under the push of the extrusion pipe, which helps to improve the sealing effect of the movable plates on the inner part of the connecting pipe. The overflow grooves on the surface of the connecting pipe are sealed by the sealing curtain, so as to prevent the sediment inside the connecting pipe from overflowing to the outside through the overflow grooves, effectively reducing the probability of the filter screen being blocked by sediment, and improving the operation stability of the farmland irrigation system;

[0021] (3) By setting up a discharging component in this solution, the sediment on the surface of the flap can be scraped off in time through the automatic flipping of the flap, so that the residual amount of sediment on the surface of the flap can be effectively reduced, and then the probability of sediment backflow can be effectively reduced, and further the water quality filtration quality can be improved. Description of the Drawings

[0022] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 is a top view of the overall structure of the present invention;

[0024] Figure 3 is of the present invention Figure 2 sectional view taken along line A-A in;

[0025] Figure 4 is of the present invention Figure 1 sectional view taken along line B-B in;

[0026] Figure 5 is of the present invention Figure 2 sectional view taken along line C-C in;

[0027] Figure 6 is of the present invention Figure 3 enlarged schematic view at D in;

[0028] Figure 7 is of the present invention Figure 3 enlarged schematic view at E in;

[0029] Figure 8 is of the present invention Figure 5 enlarged schematic view at F in.

[0030] Explanation of the reference numerals in the drawings:

[0031] 11. Aggregate box; 12. Separation cylinder; 13. Guide cylinder; 14. Inlet pipe; 15. Outlet pipe; 16. Isolation cover; 17. Sewage pipe; 18. Gate valve; 19. Screen; 20. Fixed cylinder; 21. Sand discharge port; 22. Connecting pipe; 23. Filter net; 24. Guide plate; 25. Fixed frame; 26. Towing rope; 27. Movable plate; 28. Overflow tank; 29. Limiting plate; 30. Sealing plate; 31. Installation groove; 32. Movable rod; 33. Flap; 35. Pulling bar; 36. Guide groove; 37. Scraper; 38. Baffle curtain; 39. Fixed rod; 40. Movable groove; 41. Movable block; 42. Extrusion pipe; 43. Sealing curtain; 44. Top plate; 45. Cable; 46. Material receiving plate; 47. Buffer plate. Detailed Embodiments

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] Please refer to Figures 1 to 8 , a high-standard farmland water-saving irrigation system, including a diversion cylinder 13. The lower end of the diversion cylinder 13 is fixedly connected with a separation cylinder 12. The outer surface of the lower end of the separation cylinder 12 is fixedly connected with a connecting pipe 22. The outer surface of the connecting pipe 22 is fixedly connected with an aggregate box 11. A flow-blocking component for blocking the backflow of sediment is arranged inside the connecting pipe 22;

[0034] The flow-blocking component includes a fixed frame 25 fixedly connected to the inner surface of the connecting pipe 22. An activity plate 27 is hinged to the inner surface of the connecting pipe 22 below the fixed frame 25. The activity plate 27 is in a fan-shaped structure. The number of the activity plates 27 is multiple and they are distributed in a circular array. The upper outer surfaces of the multiple activity plates 27 are all fixedly connected with a traction rope 26. The upper end of the traction rope 26 is fixedly connected to the lower outer surface of the fixed frame 25. The lower side of the outer surface of the connecting pipe 22 is fixedly connected with a fixed cylinder 20. The lower end of the fixed cylinder 20 is fixedly connected to the inner surface of the lower end of the aggregate box 11.

[0035] The lower end of the connecting pipe 22 is communicated with the inside of the fixed cylinder 20. The upper outer surface of the diversion cylinder 13 is fixedly connected with a water outlet pipe 15. The rear side of the outer surface of the diversion cylinder 13 is fixedly connected with a water inlet pipe 14. The diversion cylinder 13 is connected to a water pump through the water inlet pipe 14. The upper end of the inner surface of the diversion cylinder 13 is fixedly connected with an isolation cover 16. Both the upper and lower ends of the isolation cover 16 are open.

[0036] By adopting the above technical solution, the irrigation water source for high-standard farmland usually uses well water or river water. In order to avoid the blockage of the irrigation sprinkler by sediment in the water, it is necessary to filter the irrigation water. In the prior art, a centrifugal filter is usually used to filter and separate the sediment in the water. During operation, water is injected into the inside of the diversion cylinder 13 through the water inlet pipe 14 by a water pump. The water inlet pipe 14 is located in the tangential direction of the diversion cylinder 13. After the water flows into the inside of the diversion cylinder 13, it will flow downward in a spiral shape between the diversion cylinder 13 and the isolation cover 16 and gradually gather into the inside of the separation cylinder 12. During the flow of the water, the sediment in the water will be separated from the water under the action of gravity and centrifugal force. Then the water will flow through the partition cover into the inside of the water outlet pipe 15 and be transported to the water outlet end of the irrigation system through the water outlet pipe 15, while the sediment in the water will fall into the inside of the fixed cylinder 20 under the action of gravity;

[0037] As the sediment inside the fixed cylinder 20 accumulates continuously, during the process of water flow separation inside the separation cylinder 12, part of the sediment will be re-entrained into the interior of the separation cylinder 12 through the connecting pipe 22. The sediment on the lower side will enter the interior of the isolation cover 16 along with the water flow and be transported to the outside of the guide cylinder 13, which will have an adverse impact on the water filtration quality. Therefore, a flow-blocking component is provided. When the sediment falls downward inside the connecting pipe 22, the movable plate 27 will expand outward from the gathered state under the action of the gravity of the sediment. At this time, the sediment will fall downward through the gaps between the groups of movable plates 27. During the process of the movable plate 27 turning downward, the traction rope 26 will be stretched. The connecting pipe 22 fixedly supports the traction rope 26 through the fixing frame 25. When the sediment inside the fixed cylinder 20 flows backward upward, the movable plate 27 will turn upward and reset under the elastic force of the traction rope 26. At this time, the multiple groups of movable plates 27 distributed in a circular array will gather again from the dispersed state, and the interior of the connecting pipe 22 will be sealed by the movable plate 27, so as to effectively prevent the sediment from flowing backward upward, thereby reducing the probability of the sediment mixing with the water flow again, ensuring the water filtration quality, and effectively improving the stability of the water filtration system at the same time.

[0038] As Figure 3 , Figure 5 and Figure 7 As shown, a reflux component is provided on the outer side of the fixed cylinder 20. The reflux component includes a screen 19 fixedly connected to the outer surface of the fixed cylinder 20. The screen 19 is circular. The upper end of the inner surface of the aggregate box 11 is fixedly connected with a filter screen 23. The lower outer surface of the filter screen 23 is fixedly connected with a guide plate 24. An overflow groove 28 is formed on the outer surface of the connecting pipe 22. The number of the overflow grooves 28 is multiple and they are distributed in a circular array. The lower end of the guide plate 24 is located below the overflow groove 28.

[0039] By adopting the above technical solution, part of the sediment and water flow will be stored inside the aggregate box 11. In order to recycle the water inside the aggregate box 11, a reflux component is provided. The water flow inside the fixed cylinder 20 overflows into the interior of the aggregate box 11. The screen 19 inside the aggregate box 11 can prevent the sediment in the water from flowing backward upward along with the water flow. As the water flow inside the aggregate box 11 increases continuously, the water will enter the upper side of the guide plate 24 after being filtered by the filter screen 23, and then flow back into the connecting pipe 22 through the overflow groove 28 under the gathering action of the guide plate 24. The flowing water can impact the sediment inside the connecting pipe 22, thereby accelerating the falling of the sediment inside the connecting pipe 22, improving the cleaning effect on the sediment, reducing the probability of the connecting pipe 22 being blocked by the sediment, and improving the stability during the water filtration process.

[0040] As Figure 5 , Figure 7 and Figure 8As shown, a sealing assembly is provided inside the connecting pipe 22. The sealing assembly includes an activity groove 40 formed on the inner surface of the connecting pipe 22. The number of the activity grooves 40 is two groups and they are symmetrically distributed. Two groups of movable blocks 41 are slidably connected inside the two activity grooves 40. A squeezing pipe 42 is fixedly connected between the two movable blocks 41. The squeezing pipe 42 is in a hollow circular ring shape and is located below the movable plate 27.

[0041] The outer surface of the squeezing pipe 42 is fixedly connected with a top plate 44. The top plates 44 are distributed in a circular ring shape. A sealing curtain 43 is fixedly connected to the inner surface of the connecting pipe 22 below the overflow groove 28. The number of the sealing curtains 43 is multiple groups and they are distributed in a circular array. The top plate 44 is directly below the sealing curtain 43. The sealing curtain 43 is made of a flexible material.

[0042] By adopting the above technical solution, when the sediment inside the connecting pipe 22 flows back, in order to prevent the sediment from entering the outside of the guide plate 24 and blocking the filter net 23, a sealing assembly is provided. The connecting pipe 22 slidably supports the movable block 41 through the activity groove 40, and fixedly supports the squeezing pipe 42 through the movable block 41. When the sediment flows back, the squeezing pipe 42 will move upward under the action of buoyancy. During the upward movement of the squeezing pipe 42, it will be in close contact with the outer surface of the lower end of the movable plate 27, so that the movable plate 27 will be gathered more tightly under the push of the squeezing pipe 42, which helps to improve the sealing effect of the movable plate 27 on the inside of the connecting pipe 22. At the same time, during the upward movement of the squeezing pipe 42, it will drive the top plate 44 to move upward synchronously, and push the sealing curtain 43 upward through the top plate 44, so that the sealing curtain 43 is closely attached to the inner surface of the connecting pipe 22, and seals the overflow groove 28 on the surface of the connecting pipe 22 through the sealing curtain 43, so as to prevent the sediment inside the connecting pipe 22 from overflowing to the outside through the overflow groove 28, thereby effectively reducing the probability of the filter net 23 being blocked by sediment, and further improving the operation stability of the farmland irrigation system.

[0043] As Figure 3 、 Figure 5 、 Figure 6 And Figure 8 As shown, a discharging assembly is provided inside the fixed cylinder 20. The discharging assembly includes a sealing plate 30 fixedly connected to the inner surface of the fixed cylinder 20. An installation groove 31 is formed on the outer surface of the upper end of the sealing plate 30. An activity rod 32 is fixedly connected to the inner surface of the installation groove 31. A flap 33 is rotatably connected to the outer surface of the activity rod 32. A buffer plate 47 is fixedly connected to the outer surface of the right side of the lower end of the connecting pipe 22. A pulling bar 35 is fixedly connected to the outer surface of the lower end of the flap 33. The lower end of the pulling bar 35 is fixedly connected to the inner surface of the lower end of the aggregate box 11. The pulling bar 35 is made of an elastic material.

[0044] A guiding groove 36 is formed on the outer surface of the upper end of the flap 33. The number of the guiding grooves 36 is two groups and they are distributed in parallel. A scraping plate 37 is slidably connected inside the guiding groove 36. The scraping plate 37 is of a U-shaped structure. The outer surface of the lower end of the scraping plate 37 is in sliding contact with the upper end of the flap 33. A limiting plate 29 is fixedly connected to the left inner surface of the fixed cylinder 20. The limiting plate 29 is located below the sealing plate 30.

[0045] By adopting the above technical solution, in order to avoid the accumulation of sediment inside the fixed cylinder 20 and reduce the probability of sediment backflow, a discharging assembly is provided. The sealing plate 30 separates the inside of the fixed cylinder 20. The sealing plate 30 fixedly supports the movable rod 32 through the installation groove 31, so as to rotatably support the flap 33 through the movable rod 32. When the sediment inside the connecting pipe 22 drops downward, part of the sediment will drop onto the surface of the buffer plate 47 and fall onto the upper surface of the flap 33 under the guiding action of the buffer plate 47. The flap 33 will turn downward under the action of the gravity of the sediment. The limiting plate 29 on the lower side of the flap 33 plays a limiting role on the flap 33, so that the flap 33 can only turn away from the side of the limiting plate 29. As the flap 33 gradually turns, the sediment on the surface of the flap 33 will slide down to the lower side of the sealing plate 30 under the action of gravity. The flap 33 will stretch the tension bar 35 during the turning process. After the sediment on the surface of the flap 33 drops, the flap 33 will reverse and reset under the elastic force of the tension bar 35, so as to reduce the residue of sediment on the upper side of the sealing plate 30. During the rotation of the flap 33, the scraping plate 37 on its surface will slide downward under the action of gravity. The guiding groove 36 on the surface of the flap 33 can play a sliding guiding role on the scraping plate 37. The scraping plate 37 will scrape the surface of the flap 33 during the sliding process, so as to help scrape off the sediment on the surface of the flap 33. By setting the discharging assembly, the sediment on the surface of the flap 33 can be scraped off in time, so as to effectively reduce the residue amount of sediment on the surface of the flap 33, and further effectively reduce the probability of sediment backflow, and further improve the water quality filtration quality.

[0046] As Figure 4 shown in Figure 8 As shown, two groups of retaining curtains 38 are fixedly connected to the lower inner surface of the fixed cylinder 20 and are symmetrically distributed on the front and rear sides of the flap 33. The retaining curtains 38 are made of flexible materials. A fixing rod 39 is fixedly connected between the two groups of retaining curtains 38.

[0047] A cable 45 is fixedly connected to the middle of the outer surface of the retaining curtain 38. A receiving plate 46 is fixedly connected to the outer surface of the cable 45. The cable 45 is made of elastic material. The receiving plate 46 is located directly below the connecting pipe 22. The retaining curtain 38 is in an arc shape.

[0048] A sand discharge port 21 is provided on the left side of the outer surface of the fixed cylinder 20. A sewage discharge pipe 17 is fixedly connected to the left side of the outer surface of the aggregate box 11. A gate valve 18 is fixedly connected to the inner surface of the sewage discharge pipe 17. The buffer plate 47 is arc-shaped, and the separation cylinder 12 is conical.

[0049] By adopting the above technical solution, the curtain 38 inside the fixed cylinder 20 can play a good guiding role for the sediment, so that the sediment can be gathered on the surface of the flap 33. When the flap 33 is turned by a certain angle, the flap 33 will contact the fixing rod 39 between the flap 33 and the curtain 38. The curtain 38 will be pulled by the fixing rod 39, so as to accelerate the falling of the sediment on the surface of the curtain 38. When part of the sediment falls from the connecting pipe 22, it will fall on the surface of the receiving plate 46. The sediment will impact the receiving plate 46, causing the receiving plate 46 to turn over. During the rotation of the receiving plate 46, the cable 45 will be twisted and wound, so that the curtain 38 can be effectively pulled by the cable 45, which helps to increase the shaking amplitude of the curtain 38 and improve the smoothness of the sediment falling on the surface of the curtain 38. The sediment inside the fixed cylinder 20 is discharged to the inside of the fixed cylinder 20 through the sand discharge port 21, and then the sediment inside the aggregate box 11 is discharged through the sewage discharge pipe 17 by opening the gate valve 18, so as to effectively reduce the difficulty of cleaning the inside of the aggregate box 11.

[0050] Usage method: The water quality filtration system is one of the important devices in the farmland irrigation system. When working, water is injected into the inside of the diversion cylinder 13 through the water inlet pipe 14 by a water pump. After the water flows into the inside of the diversion cylinder 13, it will flow downward in a spiral shape between the diversion cylinder 13 and the isolation cover 16. The sediment in the water will be separated from the water under the action of gravity and centrifugal force. The sediment will fall downward under the action of gravity into the inside of the fixed cylinder 20. When the sediment inside the fixed cylinder 20 flows upward, the movable plate 27 will turn upward and reset under the elastic force of the traction rope 26, and the inside of the connecting pipe 22 will be sealed by the movable plate 27, so as to effectively prevent the sediment from flowing upward. During the upward movement of the extrusion pipe 42, it will be in contact with the outer surface of the lower end of the movable plate 27, so that the movable plate 27 will be pushed by the extrusion pipe 42 to gather more tightly, which helps to improve the sealing effect of the movable plate 27 on the inside of the connecting pipe 22. At the same time, the sealing curtain 43 is pushed upward by the top plate 44, and the overflow groove 28 on the surface of the connecting pipe 22 is sealed by the sealing curtain 43. The flap 33 will turn downward under the action of the gravity of the sediment, and the sediment on the surface of the flap 33 will slide downward under the action of gravity to the lower side of the sealing plate 30. During the rotation of the flap 33, the scraping plate 37 on its surface will slide downward under the action of gravity, and the scraping plate 37 will scrape the surface of the flap 33 during the sliding process, so as to help scrape off the sediment on the surface of the flap 33, and thus effectively reduce the probability of sediment backflow.

[0051] The above are only the preferred specific embodiments of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and its improved concept of the present invention, making equivalent substitutions or changes, shall be covered by the protection scope of the present invention.

Claims

1. A high-standard farmland water-saving irrigation system, including a diversion cylinder (13), characterized in that: The lower end of the draft tube (13) is fixedly connected to a separation tube (12). The outer surface of the lower end of the separation tube (12) is fixedly connected to a connecting pipe (22). The outer surface of the connecting pipe (22) is fixedly connected to an aggregate box (11). A flow blocking assembly for blocking the backflow of sediment is arranged inside the connecting pipe (22). The flow blocking assembly includes a fixing frame (25) fixedly connected to the inner surface of the connecting pipe (22). A movable plate (27) is hinged to the inner surface of the connecting pipe (22) below the fixing frame (25). The movable plate (27) is in a fan-shaped structure. The number of the movable plates (27) is multiple and they are distributed in a circular array. The upper outer surfaces of the multiple movable plates (27) are all fixedly connected to a traction rope (26). The upper end of the traction rope (26) is fixedly connected to the lower outer surface of the fixing frame (25). The lower side of the outer surface of the connecting pipe (22) is fixedly connected to a fixing cylinder (20). The lower end of the fixing cylinder (20) is fixedly connected to the inner surface of the lower end of the aggregate box (11).

2. The high-standard farmland water-saving irrigation system according to claim 1, characterized in that: The lower end of the connecting pipe (22) is communicated with the inside of the fixing cylinder (20). The upper outer surface of the draft tube (13) is fixedly connected to a water outlet pipe (15). The rear side of the outer surface of the draft tube (13) is fixedly connected to a water inlet pipe (14). The draft tube (13) is connected to a water pump through the water inlet pipe (14). The upper end of the inner surface of the draft tube (13) is fixedly connected to a separation cover (16). Both the upper and lower ends of the separation cover (16) are open.

3. The high-standard farmland water-saving irrigation system according to claim 2, characterized in that: A backflow assembly is arranged outside the fixing cylinder (20). The backflow assembly includes a screen (19) fixedly connected to the outer surface of the fixing cylinder (20). The screen (19) is in a circular ring shape. The upper end of the inner surface of the aggregate box (11) is fixedly connected to a filter net (23). The lower outer surface of the filter net (23) is fixedly connected to a flow guiding plate (24). The outer surface of the connecting pipe (22) is provided with overflow grooves (28). The number of the overflow grooves (28) is multiple and they are distributed in a circular array. The lower end of the flow guiding plate (24) is located below the overflow grooves (28).

4. A high-standard farmland water-saving irrigation system according to claim 3, characterized in that: A sealing assembly is arranged inside the connecting pipe (22). The sealing assembly includes movable grooves (40) opened on the inner surface of the connecting pipe (22). The number of the movable grooves (40) is two and they are symmetrically distributed. Movable blocks (41) are slidably connected to the inner sides of the two movable grooves (40). An extrusion pipe (42) is fixedly connected between the two movable blocks (41). The extrusion pipe (42) is in a hollow circular ring shape. The extrusion pipe (42) is located below the movable plate (27).

5. The high-standard farmland water-saving irrigation system according to claim 4, wherein: The outer surface of the extrusion pipe (42) is fixedly connected to a top plate (44). The top plate (44) is distributed in a circular ring shape. The inner surface of the connecting pipe (22) is fixedly connected to a sealing curtain (43) below the overflow grooves (28). The number of the sealing curtains (43) is multiple and they are distributed in a circular array. The top plate (44) is directly below the sealing curtain (43). The sealing curtain (43) is made of a flexible material.

6. The high-standard farmland water-saving irrigation system according to claim 5, characterized in that: Inside the fixed cylinder (20), a discharging assembly is provided. The discharging assembly includes a sealing plate (30) fixedly connected to the inner surface of the fixed cylinder (20). An installation groove (31) is formed on the outer surface of the upper end of the sealing plate (30). A movable rod (32) is fixedly connected to the inner surface of the installation groove (31). A flap (33) is rotatably connected to the outer surface of the movable rod (32). A buffer plate (47) is fixedly connected to the outer surface of the right side of the lower end of the connecting pipe (22). A pull bar (35) is fixedly connected to the outer surface of the lower end of the flap (33). The lower end of the pull bar (35) is fixedly connected to the inner surface of the lower end of the aggregate box (11). The pull bar (35) is made of an elastic material.

7. The high-standard farmland water-saving irrigation system according to claim 6, characterized in that: A guiding groove (36) is formed on the outer surface of the upper end of the flap (33). The number of the guiding grooves (36) is two groups and they are distributed in parallel. A scraping plate (37) is slidably connected to the inner side of the guiding groove (36). The scraping plate (37) has a U-shaped structure. The outer surface of the lower end of the scraping plate (37) is in sliding contact with the upper end of the flap (33). A limiting plate (29) is fixedly connected to the inner surface of the left side of the fixed cylinder (20). The limiting plate (29) is located below the sealing plate (30).

8. The high-standard farmland water-saving irrigation system according to claim 7, characterized in that: A baffle curtain (38) is fixedly connected to the inner surface of the lower end of the fixed cylinder (20). The number of the baffle curtains (38) is two groups and they are symmetrically distributed on the front and rear sides of the flap (33). The baffle curtain (38) is made of a flexible material. A fixing rod (39) is fixedly connected between the two baffle curtains (38).

9. The high-standard farmland water-saving irrigation system according to claim 8, characterized in that: A cable (45) is fixedly connected to the middle of the outer surface of the baffle curtain (38). A material receiving plate (46) is fixedly connected to the outer surface of the cable (45). The cable (45) is made of an elastic material. The material receiving plate (46) is located directly below the connecting pipe (22). The baffle curtain (38) is arc-shaped.

10. A high-standard farmland water-saving irrigation system according to claim 9, characterized in that: A sand discharging port (21) is formed on the outer surface of the left side of the fixed cylinder (20). A sewage pipe (17) is fixedly connected to the outer surface of the left side of the aggregate box (11). A gate valve (18) is fixedly connected to the inner surface of the sewage pipe (17). The buffer plate (47) is arc-shaped. The separation cylinder (12) is conical.

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