An irrigation device for farmland water conservancy

Abstract

The application discloses a farmland water conservancy irrigation device, and belongs to the technical field of irrigation devices. The farmland water conservancy irrigation device comprises multiple groups of buried telescopic irrigation assemblies. The buried telescopic irrigation assembly comprises an outer pipe, an inner pipe and a sprinkling irrigation device. The outer pipe is sleeved on the outer side of the inner pipe. The sprinkling irrigation device comprises a telescopic sprinkling irrigation assembly and a protection and regulation assembly. The lower end of the telescopic sprinkling irrigation assembly is connected with the inner pipe through the outer pipe. The lower end of the protection and regulation assembly is installed on the side wall of the outer pipe and is connected with the outer pipe, and is sleeved on the outer side of the telescopic sprinkling irrigation assembly. The farmland water conservancy irrigation device solves the problems of difficult fault positioning, insufficient protection and inconvenient connection in the prior art, and achieves the technical effects of accurate fault positioning, excellent protection, strong adaptability and convenient maintenance.

Description

Technical Field

[0001] This invention belongs to the field of irrigation device technology, and in particular relates to a farmland water conservancy irrigation device. Background Technology

[0002] Irrigation is a technical means of supplementing crops with the water they need to ensure their normal growth. The principle of irrigation is that the amount, frequency, and timing of irrigation should be determined according to the water requirements, growth stage, climate, and soil conditions of the medicinal plants. Irrigation should be timely, appropriate, and reasonable. Irrigation devices are used to irrigate farmland. Common irrigation methods include drip irrigation, sprinkler irrigation, micro-sprinkler irrigation, and traditional flood irrigation. Drip irrigation technology delivers water drop by drop directly to the roots of crops through drippers, saving water and being highly efficient. Sprinkler irrigation uses nozzles to spray water into fine droplets, evenly covering the farmland. These devices not only improve irrigation efficiency but also reduce water waste. Among them, buried irrigation devices are widely used in the field of farmland water conservancy and irrigation because they do not occupy arable land and do not affect ground mechanized operations.

[0003] Existing underground retractable irrigation systems mainly consist of pipes and sprinkler components. They achieve irrigation by raising and lowering the retractable pipe driven by water pressure, and retract by springs or gravity after water supply stops. However, because underground pipes are buried for a long time, it is difficult to quickly identify the faulty section after a pipe is damaged. Repairs require large-scale excavation, resulting in low repair efficiency and high costs. Moreover, connecting pipes is inconvenient and disassembly is cumbersome, which is not conducive to later maintenance and replacement. After irrigation, the water pipe and sprinkler head need to retract underground. After the water pipe and sprinkler head retract, holes are left in the ground. Soil around the holes can enter the holes due to biological activities and cultivation, which can obstruct the water pipe and sprinkler head from re-exiting the ground. If the resistance is too great, the water pipe and sprinkler head may not be able to extend, affecting the normal irrigation of the sprinkler system. In addition, existing underground irrigation systems are prone to thermal expansion and contraction or freezing of water in the inner pipes when dealing with diurnal temperature differences and the transition between winter and summer. This causes changes in the internal pressure of the pipes, which can easily lead to pipe damage. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a farmland irrigation device that solves the problems of difficult fault location, insufficient protection, and inconvenient connection in the prior art, and achieves the technical effects of accurate fault location, excellent protection, strong adaptability, and convenient maintenance.

[0005] The technical solution adopted in this invention is as follows: A farmland irrigation device includes multiple sets of buried telescopic irrigation components. The buried telescopic irrigation components include an outer pipe, an inner pipe, and a sprinkler device. The outer pipe is sleeved on the outside of the inner pipe. The sprinkler device includes a telescopic sprinkler assembly and a protective control assembly. The lower end of the telescopic sprinkler assembly passes through the outer pipe and is connected to the inner pipe. The lower end of the protective control assembly is installed on the side wall of the outer pipe and is connected to the outer pipe, while also being sleeved on the outside of the telescopic sprinkler assembly. The telescopic sprinkler assembly includes a telescopic component, which includes a fixed pipe. The lower end of the fixed pipe passes through the outer pipe, is installed on the side wall of the inner pipe, and communicates with the inner pipe. The protective control assembly includes a sleeve, a protective tube, a second spring, a support tube, and a second telescopic tube. The protective tube is sleeved on the outside of the fixed tube and communicates with the outer tube. A communicating cavity is formed between the protective tube and the fixed tube. The outer tube and the inner tube have a hollow structure. The communicating cavity and the hollow structure are connected. A fixing plate is installed on the inner sidewall of the protective tube and the fixed tube. The second spring is located in the communicating cavity and its lower end is fixed to the fixing plate. The support tube is movably sleeved between the fixed tube and the protective tube. Its lower end is connected to the upper end of the second spring, and its upper end extends out of the fixed tube and the protective tube. The sleeve is connected to the outer sidewall of the upper end of the support tube and sleeved on the outside of the protective tube. The support tube is a ring structure with a through groove running through its upper and lower walls in its middle. The second telescopic tube is movably embedded in the through groove and is composed of multiple sets of ring-shaped connecting tubes. Each set of connecting tubes has a through groove in its middle, and the outermost connecting tube is movably embedded in the through groove of the support tube. The remaining sets of connecting tubes are sequentially movably sleeved in the through grooves of the adjacent outer connecting tubes.

[0006] The upper inner wall of the protective pipe, the upper inner wall of the support pipe, and the upper inner walls of all connecting pipes except the innermost connecting pipe are all fixedly equipped with a first limiting plate; the lower end of the support pipe and the lower end of each connecting pipe are all fixedly equipped with a second limiting plate; the through groove of the innermost connecting pipe is connected to the connecting cavity; when the innermost connecting pipe moves upward, the second limiting plate at its lower end abuts against the first limiting plate at the upper end of the adjacent outer connecting pipe, thereby driving the adjacent outer connecting pipe to move upward synchronously, and so on, sequentially driving all connecting pipes and the protective pipe to rise upward, realizing the synchronous lifting action of the second telescopic pipe and the protective pipe.

[0007] Furthermore, the upper end of the support tube is provided with a slot, and the upper end of the innermost connecting tube is equipped with a baffle. The baffle is movably embedded in the slot and is located on the upper end of the fixed tube to block the opening of the fixed tube. The remaining connecting tubes are all located on the lower end of the baffle. The baffle and the slot are sealed together to seal the communicating cavity. The bottom wall of the baffle is provided with a first magnetic element, and the middle part of the baffle is provided with a placement groove. A flexible sealing element is installed in the placement groove. When the nozzle is raised, the flexible sealing element can be driven to facilitate the nozzle to extend out of the placement groove.

[0008] Among them, a reserved cavity is provided between the protective tube and the support tube, and between the fixed tube and the support tube. An annular folded bladder is installed in the reserved cavity, and multiple sets of reserved holes penetrating the side wall are opened at the upper end of the innermost connecting tube.

[0009] A pressure sensor is installed in the communicating cavity located at the lower end of the fixed plate.

[0010] The telescopic sprinkler assembly further includes a first spring and a nozzle. The telescopic assembly also includes multiple sets of sprinkler pipes. The outermost sprinkler pipe is movably embedded in the fixed pipe, and the remaining sprinkler pipes are sequentially movably embedded in the inner side of the adjacent outer sprinkler pipes. The nozzle is installed on the upper end of the innermost sprinkler pipe. The two ends of the first spring are respectively fixed to the bottom wall of the fixed pipe and the bottom wall of the nozzle. The upper inner side of the fixed pipe and the sprinkler pipes except the innermost one are provided with a third limiting plate, and the lower end of each sprinkler pipe is provided with a fourth limiting plate. The innermost sprinkler pipe is connected to the inner pipe. When it moves upward, its fourth limiting plate abuts against the third limiting plate of the adjacent outer sprinkler pipe, driving the outer sprinkler pipes to move upward synchronously to achieve sequential lifting.

[0011] Furthermore, the telescopic assembly also includes a ring-shaped push plate, which is installed on the outer wall of the upper end of any group of irrigation pipes except the innermost one. The push plate is located at the lower end of the baffle, and a second magnetic element is provided on the upper wall of the push plate. The first and second magnetic elements have opposite magnetic properties. If the height of the irrigated crop is low, the push plate is installed on the upper end of the outermost irrigation pipe. If the height of the irrigated crop is high, the push plate is installed on the upper end of the innermost irrigation pipe, as long as the reserved hole can be exposed to the crop.

[0012] The inner tube has a through hole on its side wall, which penetrates the inner tube and the cavity. An elastic layer is installed on the through hole, and the elastic layer is sealed to the side wall of the through hole, allowing water to flow through the inner tube.

[0013] Preferably, the outer tube has a first slot and a second slot at both ends. A first sealing ring is movably installed in the first slot. The two ends of the first sealing ring can be respectively embedded in the first slot and the second slot of the adjacent outer tube to seal the connection. The first sealing ring has two sets of fixing holes. The first slot and the second slot are respectively provided with a first and a second through hole. When connecting, the fixing holes correspond to the through holes and are fixed with bolts. When disassembling, the bolts are removed and the first sealing ring is pushed into the first slot to separate.

[0014] In a preferred embodiment of the present invention, the inner tube is provided with a first slot and a second slot at both ends, and a second sealing ring is movably installed in the first slot. The two ends of the second sealing ring can be respectively embedded in the first slot and the second slot of the adjacent inner tube to seal the connection. The second sealing ring is provided with two sets of fixing holes, and the first slot and the second slot are respectively provided with a third and a fourth through hole. When connected, the fixing hole corresponds to the through hole and is fixed by bolts. When disassembled, the bolts are removed and the second sealing ring is pushed into the first slot to separate.

[0015] The beneficial effects of the present invention after adopting the above structure are as follows: (1) By setting a pressure sensor in the connecting cavity and combining the buffering effect of the inner tube elastic layer, the difference in pressure change under different damage types can be used to quickly determine the fault section and damage type. Without large-area excavation, the fault location can be directly located and replaced, greatly reducing the maintenance workload and maintenance cost.

[0016] (2) By setting up flexible sealing components, the opening of the fixed pipe can be effectively sealed to prevent soil and debris from entering the telescopic sprinkler assembly and avoid telescopic jamming; the setting of reserved cavity and annular folding bladder provides space for the up and down movement of the support pipe, converting the rigid impact brought by ground pressure into elastic buffer, which can improve the service life of the equipment. When the pressed support pipe and baffle are restored under the action of the second spring, the soil at the upper end of the baffle can be relaxed, and it is also convenient for the nozzle to extend from the ground. Moreover, the cooperation between the protective pipe, the support pipe and the fixed pipe forms a multi-layer protection structure, which can prevent the pipeline from being corroded by the underground environment.

[0017] (3) The outer pipe and the inner pipe are connected by the first sealing ring and the second sealing ring respectively. When connecting, the sealing ring is fixed by bolts. When disassembling, it is only necessary to remove the bolts and push in the sealing ring to separate them. The operation is convenient. The setting of the sealing ring and the groove hole ensures the sealing of the connection and prevents water leakage. At the same time, it is convenient to maintain and replace the pipe later. It solves the problems of poor sealing of existing pipe connections and cumbersome disassembly.

[0018] (4) The elastic layer on the inner pipe sidewall can provide space for the thermal expansion and contraction of water in the inner pipe and freezing, alleviate the impact caused by the pressure change inside the pipe, avoid the pipe from being damaged due to excessive pressure, adapt to the extreme environment of day and night temperature difference and winter and summer seasons, and improve the stability and service life of the device in complex environments. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0020] Figure 1 This is a schematic diagram of the overall structure of a farmland irrigation device proposed in this invention. Figure 1 ; Figure 2 for Figure 1 A magnified view of a portion at point A; Figure 3 This is a schematic diagram of the overall structure of a farmland irrigation device proposed in this invention. Figure 2 ; Figure 4 for Figure 3 A magnified view of a portion at point B; Figure 5 This is a cross-sectional view of a farmland irrigation device proposed in this invention; Figure 6 for Figure 5 A magnified view of a portion at point C; Figure 7 for Figure 5 A magnified view of a portion at point D; Figure 8 This is a cross-sectional view of the sprinkler irrigation device proposed in this invention; Figure 9 for Figure 8 A magnified view of a portion at point E; Figure 10 for Figure 8 A magnified view of a portion at point F; Figure 11 for Figure 8 A magnified view of a portion of point H.

[0021] In the attached drawings: 1. Buried telescopic irrigation component; 2. Outer pipe; 3. Inner pipe; 4. Sprinkler device; 5. Telescopic sprinkler assembly; 6. Protective control assembly; 7. Fixed pipe; 8. Sleeve; 9. Protective pipe; 10. Second spring; 11. Support pipe; 12. Second telescopic pipe; 13. Connecting cavity; 14. Cavity; 15. Fixed plate; 16. First limiting plate; 17. Second limiting plate; 18. Baffle; 19. Placement groove; 20. Flexible sealing component, 21. Reserved cavity, 22. Annular folded bladder, 23. Reserved hole, 24. Pressure sensor, 25. First spring, 26. Sprinkler head, 27. Sprinkler pipe, 28. Third limiting plate, 29. Fourth limiting plate, 30. Push plate, 31. Elastic layer, 32. First slot, 33. Second slot, 34. First sealing ring, 35. First slot, 36. Second slot, 37. Connecting pipe, 38. Second sealing ring. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0024] like Figures 1-11 As shown, a farmland irrigation device includes multiple sets of buried telescopic irrigation components 1. Each buried telescopic irrigation component 1 includes an outer pipe 2, an inner pipe 3, and a sprinkler device 4. The outer pipe 2 is sleeved on the outside of the inner pipe 3. The sprinkler device 4 includes a telescopic sprinkler component 5 and a protective control component 6. The lower end of the telescopic sprinkler component 5 passes through the outer pipe 2 and is connected to the inner pipe 3. The lower end of the protective control component 6 is installed on the side wall of the outer pipe 2 and is connected to the outer pipe 2, while also being sleeved on the outside of the telescopic sprinkler component 5. The telescopic sprinkler assembly 5 includes a telescopic assembly, which includes a fixed pipe 7. The lower end of the fixed pipe 7 passes through the outer pipe 2, is installed on the side wall of the inner pipe 3, and communicates with the inner pipe 3. The protective control assembly 6 includes a sleeve 8, a protective tube 9, a second spring 10, a support tube 11, and a second telescopic tube 12. The protective tube 9 is sleeved on the outside of the fixed tube 7 and communicates with the outer tube 2. A communicating cavity 13 is formed between the protective tube 9 and the fixed tube 7. A cavity 14 structure is formed between the outer tube 2 and the inner tube 3. The communicating cavity 13 and the cavity 14 are connected in a continuous manner. A fixing plate 15 is installed on the inner sidewall of the protective tube 9 and the fixed tube 7. The second spring 10 is located in the communicating cavity 13 and its lower end is fixed on the fixing plate 15. The support tube 11 is movably sleeved between the fixed tube 7 and the protective tube 9. Its lower end is connected to the upper end of the second spring 10, and its upper end extends out of the fixed tube 7 and the protective tube 9. The sleeve 8 is connected to the outer sidewall of the upper end of the support tube 11 and sleeved on the outside of the protective tube 9. The support tube 11 has an annular structure with a through groove running through its upper and lower walls in its middle. The second telescopic tube 12 is movably embedded in the through groove and is composed of multiple sets of annular connecting tubes 37. Each set of connecting tubes 37 has a through groove in its middle, and the outermost connecting tube 37 is movably embedded in the through groove of the support tube 11. The remaining sets of connecting tubes 37 are sequentially movably sleeved in the through grooves of the adjacent outer connecting tubes 37.

[0025] The upper inner wall of the protective pipe 9, the upper inner wall of the support pipe 11, and the upper inner walls of all connecting pipes 37 except the innermost connecting pipe 37 are all fixedly equipped with a first limiting plate 16; the lower end of the support pipe 11 and the lower end of each connecting pipe 37 are all fixedly equipped with a second limiting plate 17; the through groove of the innermost connecting pipe 37 is connected to the connecting cavity 13; when the innermost connecting pipe 37 moves upward, the second limiting plate 17 at its lower end abuts against the first limiting plate 16 at the upper end of the adjacent outer connecting pipe 37, thereby driving the adjacent outer connecting pipe 37 to move upward synchronously, and so on, sequentially driving all connecting pipes 37 and the protective pipe 9 to lift upward, realizing the synchronous lifting action of the second telescopic pipe 12 and the protective pipe 9.

[0026] The upper end of the support tube 11 is provided with a slot, and the upper end of the innermost connecting tube 37 is provided with a baffle 18. The baffle 18 is movably embedded in the slot and is provided on the upper end of the fixed tube 7 to block the opening of the fixed tube 7. The remaining connecting tubes 37 are all provided on the lower end of the baffle 18. The baffle 18 is sealed to the slot to seal the communicating cavity 13. The bottom wall of the baffle 18 is provided with a first magnetic element, and the middle part of the baffle 18 is provided with a placement groove 19. A flexible sealing element 20 is installed in the placement groove 19. When the nozzle 26 is raised, the flexible sealing element 20 can be driven to facilitate the nozzle 26 to extend out of the placement groove 19.

[0027] A reserved cavity 21 is provided between the protective tube 9 and the support tube 11, and between the fixed tube 7 and the support tube 11. An annular folded bladder 22 is installed in the reserved cavity 21. Multiple sets of reserved holes 23 penetrating the sidewall are opened at the upper end of the innermost connecting tube 37.

[0028] A pressure sensor 24 is installed in the communicating cavity 13 located at the lower end of the fixed plate 15.

[0029] It should be noted that the outer pipe 2, inner pipe 3 and sprinkler device 4 are all buried underground, while the upper wall of the support pipe 11 and the upper wall of the baffle 18 are both located on the ground. The flexible sealing part 20 on the baffle 18 can seal the telescopic sprinkler assembly 5 to prevent soil from entering. When the support pipe 11 and the baffle 18 are subjected to downward pressure, the support pipe 11 moves down to compress the second spring 10. The reserved cavity 21 can provide space for downward movement, converting rigid impact into elastic buffer, which can improve the service life of the equipment. When the support pipe 11 and the baffle 18 move up and down, the soil at the upper end of the baffle 18 can be relaxed, which also makes it easier for the nozzle 26 to extend from the ground. When neither the outer tube 2 nor the inner tube 3 is damaged, due to the changes in day and night temperature and the alternation of winter and summer, the water remaining in the inner tube 3 undergoes physical changes such as thermal expansion and contraction or freezing. The elastic layer 31 can provide reserved space for it, thereby causing the pressure in the cavity 14 between the inner tube 3 and the outer tube 2 to change. The pressure sensor 24 is used to detect the internal pressure change. At this time, the pressure changes in the multiple pressure sensors 24 are not much different. When the outer pipe 2 is normal and the inner pipe 3 is damaged, the water in the inner pipe 3 flows into the cavity 14 and the connecting cavity 13 between the inner pipe 3 and the outer pipe 2. Compared with the pressure sensor 24 in the inner pipe 3 that is not damaged, the pressure value of this set of pressure sensors 24 changes more. During use, this set of sprinkler irrigation devices 4 will reduce the sprinkler range but will not lose its irrigation capacity. When the outer pipe 2 is damaged and the inner pipe 3 is normal, when the water in the inner pipe 3 undergoes physical changes, the pressure value of this group of pressure sensors 24 changes less compared to the pressure sensor 24 in the outer pipe 2 when it is not damaged, and the irrigation capacity of this group of sprinkler irrigation devices 4 will not be reduced. When both the outer pipe 2 and the inner pipe 3 are damaged, when the water in the inner pipe 3 undergoes physical changes, the pressure value of this set of pressure sensors 24 changes less compared to the pressure sensor 24 in the outer pipe 2 when it is not damaged. During use, this set of sprinkler devices 4 will not be lifted up by the water pressure and lose its irrigation capacity. Therefore, the above judgment can be used to locate the faulty section of the pipeline and replace it in a timely manner.

[0030] The telescopic sprinkler assembly 5 also includes a first spring 25 and a nozzle 26. The telescopic assembly also includes multiple sets of sprinkler pipes 27. The outermost sprinkler pipe 27 is movably embedded in the fixed pipe 7, and the remaining sprinkler pipes 27 are sequentially movably embedded in the inner side of the adjacent outer sprinkler pipes 27. The nozzle 26 is installed on the upper end of the innermost sprinkler pipe 27. The two ends of the first spring 25 are respectively fixed to the bottom wall of the fixed pipe 7 and the bottom wall of the nozzle 26. The upper inner side of the fixed pipe 7 and the sprinkler pipes 27 except the innermost one are provided with a third limiting plate 28. The lower end of each sprinkler pipe 27 is provided with a fourth limiting plate 29. The innermost sprinkler pipe 27 is connected to the inner pipe 3. When it moves upward, its fourth limiting plate 29 abuts against the third limiting plate 28 of the adjacent outer sprinkler pipe 27, driving the outer sprinkler pipes 27 to move upward synchronously to achieve sequential lifting.

[0031] The telescopic assembly also includes a ring-shaped push plate 30, which is installed on the outer wall of the upper end of any group of irrigation pipes 27 except the innermost irrigation pipe 27. The push plate 30 is located at the lower end of the baffle 18. The upper wall of the push plate 30 is provided with a second magnetic element. The first magnetic element and the second magnetic element have different magnetic properties. If the height of the irrigated crop is low, the push plate 30 is installed on the upper end of the outermost irrigation pipe 27. If the height of the irrigated crop is high, the push plate 30 is installed on the upper end of the innermost irrigation pipe 27. As long as the reserved hole 23 is exposed to the crop, it is acceptable. It should be noted that when irrigating crops, the water pressure in the inner pipe 3 can push the nozzle 26 out of the slot of the baffle 18 and onto the ground. When the irrigation pipe 27 is raised, it can drive the push plate 30 to rise. When the push plate 30 moves to the lower end of the baffle 18, it attracts the baffle 18 through the first and second magnetic components and drives the baffle 18 to rise together. The baffle 18 drives the connecting pipe 37 on the second telescopic pipe 12 to rise. The connecting pipe 37 and the irrigation pipe 27 rise synchronously. The reserved hole 23 on the connecting pipe 37 is located on the ground. If the inner pipe 3 is normal, water is sprayed out from the nozzle 26. If the inner pipe 3 is damaged and the outer pipe 2 is normal, water is sprayed out from the nozzle 26 and the reserved hole 23.

[0032] The inner tube 3 has a through hole on its side wall, which penetrates the inner tube 3 and the cavity 14. An elastic layer 31 is installed on the through hole, and the elastic layer 31 is sealed to the side wall of the through hole. Water flows through the inner tube 3.

[0033] The outer tube 2 has a first slot 32 and a second slot 33 at both ends. A first sealing ring 34 is movably installed in the first slot 32. The two ends of the first sealing ring 34 can be respectively embedded in the first slot 32 and the second slot 33 of the adjacent outer tube 2 to seal the connection. The first sealing ring 34 has two sets of fixing holes. The first slot 32 and the second slot 33 are respectively provided with a first and a second through hole. When connecting, the fixing hole corresponds to the through hole and is fixed by bolts. When disassembling, the bolts are removed and the first sealing ring 34 is pushed into the first slot 32 to separate.

[0034] The inner tube 3 has a first slot 35 and a second slot 36 at both ends. A second sealing ring 38 is movably installed in the first slot 35. The two ends of the second sealing ring 38 can be respectively embedded in the first slot 35 and the second slot 36 of the adjacent inner tube 3 to seal the connection. The second sealing ring 38 has two sets of fixing holes. The first slot 35 and the second slot 36 are respectively provided with a third and a fourth through hole. When connected, the fixing hole corresponds to the through hole and is fixed by bolts. When disassembled, the bolts are removed and the second sealing ring 38 is pushed into the first slot 35 to separate.

[0035] The specific usage is as follows: The outer pipe 2, inner pipe 3, and sprinkler device 4 are all buried underground. The upper wall of the support pipe 11 and the upper wall of the baffle 18 are both located on the ground. The flexible sealing part 20 on the baffle 18 can seal the telescopic sprinkler assembly 5 to prevent soil from entering. When the support pipe 11 and the baffle 18 are subjected to downward pressure, the support pipe 11 moves down to compress the second spring 10. The reserved cavity 21 can provide space for downward movement, converting rigid impact into elastic buffer, which can improve the service life of the equipment. When the support pipe 11 and the baffle 18 move up and down, the soil at the upper end of the baffle 18 can be relaxed, which also makes it easier for the nozzle 26 to extend from underground.

[0036] When irrigating crops, the water pressure in the inner pipe 3 can push the nozzle 26 out of the slot of the baffle 18 and onto the ground. When the irrigation pipe 27 is raised, it can drive the push plate 30 to rise. When the push plate 30 moves to the lower end of the baffle 18, it attracts the baffle 18 through the first and second magnetic components and drives the baffle 18 to rise together. The baffle 18 drives the connecting pipe 37 on the second telescopic pipe 12 to rise. The connecting pipe 37 and the irrigation pipe 27 rise synchronously. The reserved hole 23 on the connecting pipe 37 is located on the ground. If the inner pipe 3 is normal, water is sprayed out from the nozzle 26. If the inner pipe 3 is damaged and the outer pipe 2 is normal, water is sprayed out from the nozzle 26 and the reserved hole 23.

[0037] Pipeline fault diagnosis is as follows: When neither the outer tube 2 nor the inner tube 3 is damaged, due to the changes in day and night temperature and the alternation of winter and summer, the water remaining in the inner tube 3 undergoes physical changes such as thermal expansion and contraction or freezing. The elastic layer 31 can provide reserved space for it, thereby causing the pressure in the cavity 14 between the inner tube 3 and the outer tube 2 to change. The pressure sensor 24 is used to detect the internal pressure change. At this time, the pressure changes in the multiple pressure sensors 24 are not much different. When the outer pipe 2 is normal and the inner pipe 3 is damaged, the water in the inner pipe 3 flows into the cavity 14 and the connecting cavity 13 between the inner pipe 3 and the outer pipe 2. Compared with the pressure sensor 24 in the inner pipe 3 that is not damaged, the pressure value of this set of pressure sensors 24 changes more. During use, this set of sprinkler irrigation devices 4 will reduce the sprinkler range but will not lose its irrigation capacity. When the outer pipe 2 is damaged and the inner pipe 3 is normal, when the water in the inner pipe 3 undergoes physical changes, the pressure value of this group of pressure sensors 24 changes less compared to the pressure sensor 24 in the outer pipe 2 when it is not damaged, and the irrigation capacity of this group of sprinkler irrigation devices 4 will not be reduced. When both the outer pipe 2 and the inner pipe 3 are damaged, when the water in the inner pipe 3 undergoes physical changes, the pressure value of this set of pressure sensors 24 changes less compared to the pressure sensor 24 in the outer pipe 2 when it is not damaged. During use, this set of sprinkler devices 4 will not be lifted up by the water pressure and lose its irrigation capacity. Therefore, the above judgment can be used to locate the faulty section of the pipeline and replace it in a timely manner.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents. In conclusion, if those skilled in the art, inspired by this description, design similar structural methods and embodiments without departing from the inventive spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A farmland irrigation device, characterized in that, The device includes multiple sets of buried telescopic irrigation components. Each buried telescopic irrigation component includes an outer pipe, an inner pipe, and a sprinkler device. The outer pipe is sleeved on the outside of the inner pipe. The sprinkler device includes a telescopic sprinkler assembly and a protective control assembly. The lower end of the telescopic sprinkler assembly passes through the outer pipe and is connected to the inner pipe. The lower end of the protective control assembly is installed on the side wall of the outer pipe and is connected to the outer pipe, while also being sleeved on the outside of the telescopic sprinkler assembly. The telescopic sprinkler assembly includes a telescopic component, which includes a fixed pipe. The lower end of the fixed pipe passes through the outer pipe, is installed on the side wall of the inner pipe, and communicates with the inner pipe. The protective control assembly includes a sleeve, a protective tube, a second spring, a support tube, and a second telescopic tube. The protective tube is sleeved on the outside of the fixed tube and communicates with the outer tube. A communicating cavity is formed between the protective tube and the fixed tube. The outer tube and the inner tube have a hollow structure. The communicating cavity and the hollow structure are connected. A fixing plate is installed on the inner sidewall of the protective tube and the fixed tube. The second spring is located in the communicating cavity and its lower end is fixed to the fixing plate. The support tube is movably sleeved between the fixed tube and the protective tube. Its lower end is connected to the upper end of the second spring, and its upper end extends out of the fixed tube and the protective tube. The sleeve is connected to the outer sidewall of the upper end of the support tube and sleeved on the outside of the protective tube. The support tube is a ring structure with a through groove running through its upper and lower walls in its middle. The second telescopic tube is movably embedded in the through groove and is composed of multiple sets of ring-shaped connecting tubes. Each set of connecting tubes has a through groove in its middle, and the outermost connecting tube is movably embedded in the through groove of the support tube. The remaining sets of connecting tubes are sequentially movably sleeved in the through grooves of the adjacent outer connecting tubes.

2. The farmland irrigation device according to claim 1, characterized in that, The upper inner wall of the protective pipe, the upper inner wall of the support pipe, and the upper inner walls of all connecting pipes except the innermost connecting pipe are all fixedly installed with a first limiting plate; the lower end of the support pipe and the lower end of each connecting pipe are all fixedly installed with a second limiting plate; the through groove of the innermost connecting pipe is connected to the communicating cavity.

3. The farmland irrigation device according to claim 2, characterized in that, The upper end of the support tube is provided with a slot, and the upper end of the innermost connecting tube is provided with a baffle. The baffle is movably embedded in the slot and is provided on the upper end of the fixed tube to block the opening of the fixed tube. The remaining connecting tubes are all provided on the lower end of the baffle. The bottom wall of the baffle is provided with a first magnetic element, and the middle part of the baffle is provided with a placement groove, in which a flexible sealing element is installed.

4. The farmland irrigation device according to claim 3, characterized in that, A reserved cavity is provided between the protective tube and the support tube, and between the fixed tube and the support tube. An annular folded bladder is installed in the reserved cavity. Multiple sets of reserved holes penetrating the sidewall are opened at the upper end of the innermost connecting tube.

5. The farmland irrigation device according to claim 4, characterized in that, A pressure sensor is installed in the communicating cavity located at the lower end of the fixed plate.

6. The farmland irrigation device according to claim 5, characterized in that, The telescopic sprinkler assembly also includes a first spring and a nozzle. The telescopic assembly also includes multiple sets of sprinkler pipes. The outermost sprinkler pipe is movably embedded in the fixed pipe, and the remaining sprinkler pipes are sequentially movably embedded in the inner side of the adjacent outer sprinkler pipes. The nozzle is installed on the upper end of the innermost sprinkler pipe. The two ends of the first spring are respectively fixed to the bottom wall of the fixed pipe and the bottom wall of the nozzle. The upper inner side of the fixed pipe and the sprinkler pipes other than the innermost one are provided with a third limiting plate, and the lower end of each sprinkler pipe is provided with a fourth limiting plate.

7. The farmland irrigation device according to claim 6, characterized in that, The telescopic assembly also includes a ring-shaped push plate, which is installed on the outer wall of the upper end of any group of irrigation pipes except the innermost irrigation pipe. The push plate is located at the lower end of the baffle, and the upper wall of the push plate is provided with a second magnetic element. The first magnetic element and the second magnetic element have different magnetic properties.

8. The farmland irrigation device according to claim 7, characterized in that, The inner tube has a through hole on its side wall, which penetrates the inner tube and the cavity, and an elastic layer is installed on the through hole.

9. A farmland irrigation device according to claim 8, characterized in that, The outer tube has a first slot and a second slot at both ends. A first sealing ring is movably installed in the first slot. The two ends of the first sealing ring can be respectively embedded in the first slot and the second slot of the adjacent outer tube to seal the connection. The first sealing ring has two sets of fixing holes. The first slot and the second slot are respectively provided with a first and a second through hole. When connected, the fixing hole corresponds to the through hole and is fixed by bolts.

10. A farmland irrigation device according to claim 9, characterized in that, The inner tube has a first slot and a second slot at both ends. A second sealing ring is movably installed in the first slot. The two ends of the second sealing ring can be respectively embedded in the first slot and the second slot of the adjacent inner tube to seal the connection. The second sealing ring has two sets of fixing holes. The first slot and the second slot have a third and a fourth through hole, respectively. When connected, the fixing hole corresponds to the through hole and is fixed by bolts.

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