Fruit tree root underground infiltrating irrigation device and use method thereof

Abstract

The invention discloses a fruit tree root underground infiltrating irrigation device which comprises an outer protection pipe, a functional pipe, an irrigation pipe, a plurality of spray heads and a plurality of strip-shaped grooves, and the outer protection pipe is vertically buried in a fruit tree planting pit; the functional pipe and the outer protection pipe are coaxially arranged, the functional pipe is rotationally connected with the upper end of the outer protection pipe, and the upper end of the functional pipe penetrates out of the ground; the irrigation pipe coaxially sleeves the inner side of the outer protection pipe, the upper end of the irrigation pipe is in threaded connection with the lower end of the functional pipe, and the irrigation pipe is in sliding connection with the outer protection pipe and can slide in the axial direction of the outer protection pipe; the multiple sprayers are arranged on the side wall of the irrigation pipe and communicate with the interior of the irrigation pipe, the multiple sprayers are evenly distributed in the circumferential direction of the irrigation pipe, the multiple strip-shaped grooves are axially formed in the side wall of the outer protection pipe and correspond to the sprayers one to one, and the water outlet ends of the sprayers can penetrate out of the strip-shaped grooves; when the functional pipe is rotated, the irrigation pipe and the nozzles on the irrigation pipe can be driven to slide downwards; in conclusion, effective irrigation of the roots of the fruit trees can be guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of agricultural irrigation technology, specifically relating to an underground seepage irrigation device for fruit tree roots and its usage method. Background Technology

[0002] In agricultural irrigation applications, underground pipeline seepage irrigation is gaining increasing attention as a highly efficient and water-saving irrigation technology. Underground pipeline seepage irrigation involves burying seepage pipes with perforations in their walls underground. Irrigation water (or liquid fertilizers, pesticides, or gases) is transported through the pipes to the seepage pipes and seeps out through the perforations, ultimately being absorbed and utilized by the crop roots. Compared to traditional irrigation techniques, underground pipeline seepage irrigation has many significant advantages. For example, the seepage irrigation system uses pipelines for water transport, eliminating water loss, resulting in high water utilization and significant water conservation. The low-pressure transport of seepage water reduces energy consumption, leading to energy savings. It does not damage the soil structure, maintaining good aeration in the topsoil layer, enabling stable delivery and proportion coordination of water, fertilizer, pesticides, and gases, and allowing for automatic adjustment to provide a stable growing environment for crops, resulting in significant yield increases. It minimally encroaches on farmland, does not hinder agricultural machinery operations, field management, or transportation, has low maintenance costs, and facilitates automated control.

[0003] Existing underground drip irrigation systems include water tanks, irrigation pipes, sprinklers, etc.; the water tank is used to store water, the irrigation pipe is used to transport water from the water source to the location that needs drip irrigation, and the sprinklers are installed on the irrigation pipes to drip water evenly onto the root zone of the plants.

[0004] As fruit trees grow, their roots continue to grow downwards. Therefore, to ensure that the roots can effectively absorb water and nutrients, the sprinkler heads of the drip irrigation system should be installed downwards in sync with the downward growth of the roots. However, the irrigation pipes and sprinkler heads of existing fruit tree root drip irrigation systems are fixed at a certain height and cannot slide downwards in sync with the growth of the fruit trees, thus affecting the irrigation effect. Summary of the Invention

[0005] The purpose of this invention is to provide a subsurface irrigation device for fruit tree roots, which can avoid the impact on the normal growth of plants caused by the inability of existing subsurface irrigation devices to loosen the soil around the root-irrigated plants.

[0006] The technical solution adopted in this invention is a subsurface irrigation device for the roots of fruit trees, comprising: The outer protective pipe is vertically buried in the fruit tree planting pit; The functional tube is coaxially arranged with the outer protective tube and rotatably connected to the upper end of the outer protective tube. The upper end of the functional tube extends out of the ground. An irrigation pipe is coaxially sleeved inside an outer protective pipe. The upper end of the irrigation pipe is threadedly connected to the lower end of the functional pipe. The irrigation pipe is slidably connected to the outer protective pipe and can slide along its axial direction. Multiple sprinklers are installed on the side wall of the irrigation pipe and are connected to the inside of the irrigation pipe. The sprinklers are evenly distributed along the circumference of the irrigation pipe. Multiple strip grooves are provided, and the sidewalls of the outer protective pipe are axially arranged. Each strip groove corresponds to a nozzle. The water outlet end of the nozzle can pass through the strip groove. When the functional pipe is rotated, it can drive the irrigation pipe and the nozzle on the irrigation pipe to slide downward.

[0007] The outer wall of the specific irrigation pipe is equipped with a slider, and the inner wall of the outer protective pipe has a groove arranged along its axis, allowing the slider to slide freely within the groove.

[0008] Each irrigation pipe is provided with a mounting hole for installing each nozzle. The nozzle is slidably connected to the mounting hole. A drive structure connected to the nozzle is also provided on the lower side of the nozzle. The drive structure is correspondingly located between the lower end of the irrigation pipe and the lower side of the outer protective pipe. The drive structure can drive the nozzle to slide along the radial direction of the irrigation pipe.

[0009] The nozzle includes a fixed sleeve, a telescopic sleeve, and a nozzle. The fixed sleeve is installed in the mounting hole, the telescopic sleeve is installed inside the fixed sleeve and is slidably connected to the fixed sleeve, one end of the telescopic sleeve is connected to the inside of the irrigation pipe, the nozzle is installed at the other end of the telescopic sleeve, and one end of the drive structure is fixedly connected to the telescopic sleeve.

[0010] The drive structure includes a connecting pipe, a transmission pipe, a frustum, a pusher plate, and a push rod. The connecting pipe is fixedly installed inside the outer protective pipe and located below the telescopic sleeve. The irrigation pipe is slidably connected to the connecting pipe. The transmission pipe is located below the irrigation pipe and is slidably connected to the connecting pipe. A frustum-shaped groove is provided on the lower end face of the irrigation pipe. The frustum is fixedly installed on the upper end of the transmission pipe and is slidably connected to the groove. A gap is left between the frustum and the groove. The pusher plate is installed in the gap and can contact the upper end of the frustum. The push rod is vertically installed through the lower end of the irrigation pipe and the lower end of the push rod is connected to the pusher plate. A transmission assembly is also provided between the outer side of the transmission pipe and the telescopic sleeve.

[0011] A first spring is provided on the outer side of the truncated cone, and the upper end of the first spring is connected to the push plate.

[0012] An installation cylinder is fitted around the lower outer side of the outer protective tube. The transmission assembly includes a first wedge block, a second wedge block, a second spring, and a transmission rod. The first wedge block is fixedly mounted on the outer wall of the connecting tube, and the second wedge block is mounted on the inner side of the outer protective tube. The second wedge block is located above the first wedge block, and its inclined surface corresponds to the inclined surface of the first wedge block. A second spring is also provided between the second wedge block and the inner wall of the installation cylinder. A transmission rod is provided between the second wedge block and the telescopic sleeve, and the transmission rod passes through the connecting tube.

[0013] The lower end of the connecting pipe extends out of the lower end of the mounting cylinder, and a drill bit is also installed at the lower end of the connecting pipe.

[0014] Each strip groove is also equipped with a protective cover on the outside, with slits for water spraying out. The inside of the protective cover is also equipped with two protective plates, which are set along the length of the strip groove and are hinged to the strip groove.

[0015] A slider is installed on the outer wall of the irrigation pipe, and a groove is installed on the inner wall of the outer protective pipe along its axis, allowing the slider to slide freely within the groove.

[0016] Another technical solution of the present invention is a method for using a fruit tree root underground drip irrigation device, based on the fruit tree root underground drip irrigation device described above, specifically including the following steps: After the fruit trees have grown for a period of time, press down on the push rod to retract the nozzle to the inside of the strip groove; Rotate the functional tube; as the functional tube rotates, it causes the irrigation tube, which is threadedly connected to it, to slide downwards. When the nozzle connected to the irrigation pipe reaches the position corresponding to the plant roots, turn on the water source switch connected to the irrigation pipe to irrigate.

[0017] The beneficial effects of this invention are: The fruit tree root underground drip irrigation device disclosed in this invention requires the operator to rotate the functional pipe after a period of drip irrigation. As the functional pipe rotates, the irrigation pipe connected to it slides downwards. Consequently, as the irrigation pipe slides downwards, multiple nozzles mounted on it also slide downwards. Therefore, as the fruit tree roots move downwards over time, the position of the irrigation pipe can be adjusted, causing the nozzles on the irrigation pipe to move synchronously with the downward movement of the roots. In summary, the fruit tree root underground drip irrigation device disclosed in this invention can ensure effective irrigation of the fruit tree roots. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an underground drip irrigation device for fruit tree roots according to the present invention; Figure 2This is a schematic diagram of an irrigation pipe on an underground seepage irrigation device for fruit tree roots according to the present invention; Figure 3 yes Figure 2 Enlarged view of point A above.

[0019] In the diagram, 1. outer protective tube; 2. functional tube; 3. irrigation tube; 4. slider; 5. nozzle; 6. strip groove; 7. push plate; 8. connecting tube; 9. transmission tube; 10. frustum; 11. first spring; 12. protective cover; 13. fixing sleeve; 14. telescopic sleeve; 15. first wedge block; 16. second wedge block; 17. second spring; 18. transmission rod; 19. drill bit; 20. nozzle; 21. push rod; 22. mounting cylinder. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0021] In agricultural irrigation applications, underground pipeline seepage irrigation is gaining increasing attention as a highly efficient and water-saving irrigation technology. Underground pipeline seepage irrigation involves burying seepage pipes with perforations in their walls underground. Irrigation water (or liquid fertilizers, pesticides, or gases) is transported through the pipes to the seepage pipes and seeps out through the perforations, ultimately being absorbed and utilized by the crop roots. Compared to traditional irrigation techniques, underground pipeline seepage irrigation has many significant advantages. For example, the seepage irrigation system uses pipelines for water transport, eliminating water loss, resulting in high water utilization and significant water conservation. The low-pressure transport of seepage water reduces energy consumption, leading to energy savings. It does not damage the soil structure, maintaining good aeration in the topsoil layer, enabling stable delivery and proportion coordination of water, fertilizer, pesticides, and gases, and allowing for automatic adjustment to provide a stable growing environment for crops, resulting in significant yield increases. It minimally encroaches on farmland, does not hinder agricultural machinery operations, field management, or transportation, has low maintenance costs, and facilitates automated control.

[0022] Existing underground drip irrigation systems include water tanks, irrigation pipes, sprinklers, etc.; the water tank is used to store water, the irrigation pipe is used to transport water from the water source to the location that needs drip irrigation, and the sprinklers are installed on the irrigation pipes to drip water evenly onto the root zone of the plants.

[0023] As fruit trees grow, their roots continue to grow downwards. Therefore, to ensure that the roots can effectively absorb water and nutrients, the sprinkler heads of the drip irrigation system should be installed downwards in sync with the downward growth of the roots. However, the irrigation pipes and sprinkler heads of existing fruit tree root drip irrigation systems are fixed at a certain height and cannot slide downwards in sync with the growth of the fruit trees, thus affecting the irrigation effect.

[0024] This invention discloses a subsurface irrigation device for the roots of fruit trees, such as... Figures 1-2 As shown, the system includes: an outer protective pipe 1, a functional pipe 2, an irrigation pipe 3, multiple sprinklers 5, and multiple strip grooves. The outer protective pipe 1 is vertically buried in the fruit tree planting pit. The functional pipe 2 is coaxially arranged with the outer protective pipe 1 and rotatably connected to its upper end, with the upper end of the functional pipe 2 extending above the ground. The irrigation pipe 3 is coaxially sleeved inside the outer protective pipe 1, with its upper end threadedly connected to the lower end of the functional pipe 2. The irrigation pipe 3 is slidably connected to the outer protective pipe 1 and can slide along its axial direction. Specifically, the outer side of the irrigation pipe 3... A slider 4 is provided on the wall, and a groove is provided on the inner side wall of the outer protective tube 1 along its axial direction. The slider 4 can slide freely in the groove. Multiple nozzles 5 are provided on the side wall of the irrigation pipe 3 and are connected to the inside of the irrigation pipe 3. The multiple nozzles 5 are evenly distributed along the circumference of the irrigation pipe 3. Multiple strip grooves 6 are provided on the side wall of the outer protective tube 1 along its axial direction. The multiple strip grooves 6 correspond one-to-one with the nozzles 5. The water outlet end of the nozzle 5 can pass through the strip groove. When the functional tube 2 is rotated, it can drive the irrigation pipe 3 and the nozzles 5 on the irrigation pipe 3 to slide downward.

[0025] Therefore, in the fruit tree root underground drip irrigation device disclosed in this invention, after each drip irrigation period, the plant roots will grow downwards a certain distance. At this time, the position of the nozzles 5 needs to be adjusted downwards accordingly. When the operator rotates the functional pipe 2, the irrigation pipe 3 connected to it by threads will slide downwards. As the irrigation pipe 3 slides downwards, the multiple nozzles 5 set on the irrigation pipe 3 also slide downwards. Therefore, after the fruit tree grows for a period of time, as the fruit tree roots move downwards, the position of the irrigation pipe can be adjusted so that the position of the nozzles 5 on the irrigation pipe 3 moves synchronously with the downward movement of the roots. In summary, the fruit tree root underground drip irrigation device disclosed in this invention can ensure effective irrigation of the fruit tree roots.

[0026] Furthermore, to prevent the sprinkler head 5 from being affected by the soil during its sliding process and to avoid the sprinkler head 5 being blocked by the soil, each irrigation pipe 3 disclosed in this embodiment is provided with a mounting hole for installing each sprinkler head 5. The sprinkler head 5 is slidably connected to the mounting hole. A drive structure connected to the lower side of the sprinkler head 5 is also provided. The drive structure is correspondingly located between the lower end of the irrigation pipe 3 and the lower side of the outer protective pipe 1. The drive structure can drive the sprinkler head 5 to slide radially along the irrigation pipe 3. When the drive structure is working, it can drive the sprinkler head 5 to slide radially along the irrigation pipe 3 and slide in a direction close to the inside of the irrigation pipe. At this time, the sprinkler head 5 can retract to the inside of the strip groove, thereby avoiding being blocked by the soil.

[0027] To achieve normal retraction of the nozzle 5, the nozzle 5 disclosed in this embodiment includes a fixed sleeve 13, a telescopic sleeve 14, and a nozzle 20. The fixed sleeve 13 is disposed within the mounting hole, and the telescopic sleeve 14 is disposed inside the fixed sleeve 13 and slidably connected to it. One end of the telescopic sleeve 14 is connected to the inside of the irrigation pipe 3, and the nozzle 20 is disposed at the other end of the drive structure, with one end of the drive structure fixedly connected to the telescopic sleeve 14. Therefore, when the drive structure is working, it can drive the telescopic sleeve 14 to slide radially along the irrigation pipe 3, and finally, the telescopic sleeve 14 drives the nozzle 20 to retract to the inside of the strip groove.

[0028] Furthermore, the drive structure disclosed in this embodiment includes a connecting pipe 8, a transmission pipe 9, a frustum 10, a pusher 7, and a push rod 21. The connecting pipe 8 is fixedly installed inside the outer protective pipe 1 and is located below the telescopic sleeve 14. The irrigation pipe 3 is slidably connected to the connecting pipe 8. The transmission pipe 9 is installed below the irrigation pipe 3 and is slidably connected to the connecting pipe 8. A frustum-shaped groove is provided on the lower end face of the irrigation pipe 3. The frustum 10 is fixedly installed on the upper end of the transmission pipe 9 and is slidably connected to the groove. A gap is left between the frustum 10 and the groove. The pusher 7 is installed in the gap and can contact the upper end of the frustum 10. The push rod 21 is vertically installed through the lower end of the irrigation pipe 3 and the lower end of the push rod 21 is connected to the pusher 7. The upper end of the push rod 21 extends out of the functional pipe 2 and the push rod 21 can slide up and down. A transmission component is also provided between the outer side of the transmission pipe 9 and the telescopic sleeve 14. Therefore, when the push rod 21 is pushed downward, the push rod 21 pushes the push plate 7, the frustum 10 and the transmission tube 9 downward in sequence. After the transmission tube 9 slides downward, it can drive the telescopic sleeve 14 to slide through the transmission assembly.

[0029] like Figures 2-3As shown, in this embodiment, the lower outer side of the outer protective tube 1 is also fitted with an installation cylinder 22. The transmission assembly includes a first wedge block 15, a second wedge block 16, a second spring 17, and a transmission rod 18. The first wedge block 15 is fixedly installed on the outer wall of the connecting tube 8. The second wedge block 16 is installed on the inner side of the outer protective tube 1. The second wedge block 16 is located above the first wedge block 15 and its inclined surface corresponds to the inclined surface on the first wedge block 15. A second spring 17 is also provided between the second wedge block 16 and the inner wall of the installation cylinder 22. A transmission rod 18 is provided between the second wedge block 16 and the telescopic sleeve 14. The transmission rod 18 passes through the connecting tube 8. When the transmission tube 9 slides downward, it drives the first wedge block 15 to slide downward. When the first wedge block 15 slides downward, it can push the second wedge block 16, which is set opposite to it, to slide. Under the action of the second spring 17, the second wedge block 16 can slide towards the direction of the transmission tube 9. Finally, because the transmission rod 18 passes through the connecting tube 8 and its two ends are connected to the second wedge block 16 and the telescopic sleeve 14 respectively, when the second wedge block 16 slides towards the direction of the transmission tube 9, it can drive the telescopic sleeve 14 to slide through the transmission rod 18. Finally, the telescopic sleeve 12 drives the nozzle to retract inward.

[0030] Furthermore, in this embodiment, a first spring 11 is provided on the outer side of the frustum 10, and the upper end of the first spring 11 is connected to the push plate 7. Therefore, when the push plate 7 slides down, it can drive the frustum 10 to slide down through the first spring 11. When the push rod 21 is no longer pressed, under the reset action of the first spring 11, the frustum 10 and the transmission tube 9 can return to their original positions. Finally, when the transmission tube 9 slides up, it drives the second wedge block 16 to slide away from the transmission tube 9. Finally, it drives the telescopic sleeve 14 through the transmission rod 18, so that the nozzle 20 on the telescopic sleeve 14 returns to its original position and can spray water normally.

[0031] To ensure that the connecting pipe 8 can slide downward normally when the push rod 21 is pressed, the lower end of the connecting pipe 8 disclosed in this embodiment extends through the lower end of the mounting cylinder 22, and a drill bit 19 is also provided at the lower end of the connecting pipe 8. Therefore, with the assistance of the drill bit 19, the connecting pipe 8 can slide downward normally.

[0032] Furthermore, each strip groove 6 disclosed in this embodiment is also provided with a protective cover 12 on its outer side. The protective cover 12 is provided with a slit for water spraying. Two protective plates are also provided on the inner side of the protective cover 12. The two protective plates are arranged along the length of the strip groove 6 and are hinged to the strip groove 6. The protective cover 12 can protect the nozzle 20 on its inner side, and the water sprayed from the nozzle flows out through the slit on the protective cover 12 to act on the plant roots. The two hinged plates hinged to the strip groove 6 can provide further protection for the nozzle 20. When the nozzle 20 retracts with the telescopic sleeve 20, the nozzle 20 can retract to the inner side of the two protective plates. When the nozzle 20 slides out with the telescopic sleeve 20, the nozzle 20 can push open the two protective plates and slide out of the two protective plates. This invention also discloses a method for using a fruit tree root underground drip irrigation device. Based on the above-mentioned fruit tree root underground drip irrigation device, it is characterized by specifically including the following steps: After the fruit trees have grown for a period of time, press down on the push rod 21 and cause the nozzle 20 to retract to the inside of the strip groove 6; Rotate the functional tube 2. When the functional tube 2 rotates, it causes the irrigation tube 3, which is threadedly connected to it, to slide downward. When the nozzle 20 connected to the irrigation pipe 3 reaches the position corresponding to the plant roots, turn on the water source switch connected to the irrigation pipe 3 to irrigate.

[0033] The embodiments described above are merely preferred embodiments of the present invention, and the scope of protection of the present invention is not limited thereto. Any simple changes or equivalent substitutions of the technical solutions that can be obviously obtained by those skilled in the art within the scope of the technology disclosed in the present invention shall fall within the scope of protection of the present invention.

Claims

1. A fruit tree root underground infiltration irrigation device, characterized in that, The utility model provides a kind of fruit tree irrigation device, including: Outer protection pipe (1) is vertically buried in fruit tree planting pit; Functional pipe (2) is coaxially arranged with the outer protection pipe (1) and is rotatably connected with the upper end of the outer protection pipe (1), and the upper end of the functional pipe (2) penetrates the ground; Irrigation pipe (3) is coaxially sleeved inside the outer protection pipe (1), and the upper end of the irrigation pipe (3) is threadedly connected with the lower end of the functional pipe (2), the irrigation pipe (3) is slidably connected with the outer protection pipe (1), and the irrigation pipe (3) can slide along the axial direction thereof; A plurality of spray heads (5) are arranged on the side wall of the irrigation pipe (3) and are in communication with the inside of the irrigation pipe (3), and the plurality of spray heads (5) are uniformly distributed along the circumference of the irrigation pipe (3); A plurality of strip-shaped grooves (6) are axially arranged on the side wall of the outer protection pipe (1), and the plurality of strip-shaped grooves (6) correspond to the spray heads (5) one by one, the water outlet end of the spray head (5) can penetrate the strip-shaped groove (6), and the functional pipe (2) can drive the irrigation pipe (3) and the spray head (5) on the irrigation pipe (3) to slide downward when the functional pipe (2) is rotated.

2. The underground root irrigation device for fruit trees according to claim 1, characterized in that, Each irrigation pipe (3) is provided with a mounting hole for mounting each spray head (5), the spray head (5) is slidably connected with the mounting hole, and the lower side of the spray head (5) is further provided with a driving structure connected therewith, the driving structure is correspondingly arranged between the lower end of the irrigation pipe (3) and the lower side of the outer protection pipe (1), and the driving structure can drive the spray head (5) to slide along the radial direction of the irrigation pipe (3).

3. The underground root irrigation device for fruit trees according to claim 2, characterized in that, The spray head (5) comprises a fixed sleeve (13), an extension sleeve (14), and a nozzle (20), the fixed sleeve (13) is arranged in the mounting hole, the extension sleeve (14) is arranged inside the fixed sleeve (13) and is slidably connected with the fixed sleeve (13), one end of the extension sleeve (14) is connected with the inside of the irrigation pipe (3), the nozzle (20) is arranged at the other end of the extension sleeve (14), and one end of the driving structure is fixedly connected with the extension sleeve (14).

4. The underground root irrigation device for fruit trees according to claim 3, characterized in that, The driving structure comprises a connecting pipe (8), a transmission pipe (9), a circular table (10), a push piece (7), and a push rod (21), the connecting pipe (8) is fixedly arranged inside the outer protection pipe (1) and is located below the extension sleeve (14), the irrigation pipe (3) is slidably connected with the connecting pipe (8), the transmission pipe (9) is arranged on the lower side of the irrigation pipe (3) and is slidably connected with the connecting pipe (8), the lower end surface of the irrigation pipe (3) is provided with a groove, the circular table (10) is fixedly arranged on the upper end of the transmission pipe (9) and is slidably connected with the groove, a gap is left between the circular table (10) and the groove, the push piece (7) is arranged in the gap and can contact the upper end of the circular table (10), the push rod (21) vertically penetrates the lower end of the irrigation pipe (3) and is connected with the push piece (7), and a transmission assembly is further arranged between the outside of the transmission pipe (9) and the extension sleeve (14).

5. The underground root irrigation device for fruit trees according to claim 4, characterized in that, The first spring (11) is arranged outside the circular truncated cone (10), and the upper end of the first spring (11) is connected with the push piece (7).

6. The underground root irrigation device for fruit trees according to claim 4, characterized in that, The lower end of the outer protection pipe (1) is further sleeved with a mounting cylinder (22), the transmission assembly comprises a first wedge block (15), a second wedge block (16), a second spring (17) and a transmission rod (18), the first wedge block (15) is fixedly arranged on the outer side wall of the connecting pipe (8), the second wedge block (16) is arranged on the inner side of the outer protection pipe (1), the second wedge block (16) is located on the upper side of the first wedge block (15) and the inclined surface thereon corresponds to the inclined surface on the first wedge block (15), the second spring (17) is further arranged between the second wedge block (16) and the inner wall of the mounting cylinder (22), the transmission rod (18) is arranged between the second wedge block (16) and the telescopic sleeve (14), and the transmission rod (18) passes through the connecting pipe (8).

7. The underground root irrigation device for fruit trees according to claim 6, characterized in that, The lower end of the connecting pipe (8) passes through the lower end of the mounting cylinder (22), and the lower end of the connecting pipe (8) is further provided with a drill bit (19).

8. The underground root irrigation device for fruit trees according to claim 1, characterized in that, The outer side of each strip-shaped groove (6) is further provided with a protective cover (12), the protective cover (12) is provided with a gap for water spraying, the inner side of the protective cover (12) is further provided with two protective plates, the two protective plates are arranged along the length direction of the strip-shaped groove (6), and the protective plates are hingedly connected with the strip-shaped groove (6).

9. The underground root irrigation device for fruit trees according to claim 1, characterized in that, The outer side wall of the irrigation pipe (3) is provided with a sliding block (4), and the inner side wall of the outer protection pipe (1) is provided with a sliding groove arranged along the axial direction thereof, and the sliding block (4) can freely slide in the sliding groove.

10. A method of using a fruit tree root underground irrigation device based on the fruit tree root underground irrigation device according to claim 7, characterized in that, Specifically comprising the following steps: After the fruit trees grow for a period of time, the push rod (21) is pressed downward to realize the contraction of the nozzle (20) to the inner side of the strip-shaped groove (6); The function pipe (2) is rotated, and the function pipe (2) drives the irrigation pipe (3) connected therewith to slide downward when the function pipe (2) is rotated; When the nozzle (20) connected to the irrigation pipe (3) reaches the position corresponding to the root of the plant, the water source switch connected with the irrigation pipe (3) is opened to realize irrigation.

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