An apparatus for irrigating alfalfa in a desertifying soil

Abstract

The application relates to a device for irrigating alfalfa in sandy soil, which comprises a moving table, a spraying mechanism arranged on the moving table, a power assembly and two groups of following lifting assemblies symmetrically arranged on the moving table, the following lifting assemblies being connected with the power assembly, a rotating piece being fixed to one end of the power assembly away from the moving table, two sliders being symmetrically arranged on the rotating piece, elastic assemblies being connected between the sliders and the rotating piece, the sliders being further connected with the following lifting assemblies through connecting assemblies, when the power assembly is in action, the two sliders can move away from each other to drive the following lifting assemblies to act, a water tank is further installed on the moving table, a water pump arranged on the moving table can pump water in the water tank to the end of the following lifting assembly, the water inlet of the water pump is connected with a flow regulating assembly arranged in the water tank and connected with the connecting assemblies, the range of the sprinkling irrigation can be adjusted, and the water resource utilization rate is improved.

Description

Technical Field

[0001] This invention relates to the field of irrigation, specifically to a device for irrigating alfalfa in sandy soil. Background Technology

[0002] Alfalfa, known as the "King of Forage" due to its high yield, excellent quality, rich content of crude protein and other nutrients, wide adaptability, and strong resistance to adverse conditions, is a plant with significant cultivation value worldwide. Furthermore, as a legume, alfalfa has a strong nitrogen-fixing capacity, improving soil organic matter and serving as an excellent green manure crop. As a perennial plant, alfalfa has a well-developed root system, playing a role in soil and water conservation, windbreak and sand fixation, and ecological protection. Its strong ecological adaptability and stability also provide crucial material support for the phytoremediation industry. In conclusion, the economic value of alfalfa makes a significant contribution to my country's agricultural and livestock production and ecological economic development.

[0003] Although my country has a vast territory, its usable land resources are limited. The coastal areas possess enormous potential for tidal flat development, which is being rapidly exploited. Salt-tolerant plants, once established, can improve soil quality, necessitating an understanding of their salt tolerance while simultaneously enhancing their resilience. Meanwhile, while northern my country has a larger area of ​​usable land, the region suffers from chronic drought, leading to a continuous increase in arid agricultural areas and significant water shortages for agricultural development. Alfalfa, with its high resilience potential, is of great significance for the rational utilization and improvement of salinized and drought-prone agricultural land.

[0004] Alfalfa is highly nutritious, with benefits for the spleen and stomach, the large and small intestines, and the elimination of bladder stones. Alfalfa contains the highest amount of Vitamin K, surpassing all other vegetables. It is also rich in other vitamins such as C and B.

[0005] Alfalfa is widely cultivated due to its high nutritional value. Regular irrigation is necessary for its healthy growth, and most existing methods are sprinkler irrigation. While sprinkler irrigation provides good coverage, it also has significant limitations. Specifically, the water flow rate in sprinkler irrigation is constant. Increasing the irrigation area requires pressurizing the water, which increases the spray radius, but this also reduces the water yield per unit area. Therefore, this invention provides a method that can adaptively adjust the water supply according to changes in the spraying area, ensuring a constant water yield per unit area for alfalfa irrigation. Summary of the Invention

[0006] The purpose of this invention is to provide an apparatus for irrigating alfalfa in sandy soil, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A device for irrigating alfalfa in sandy soil, comprising:

[0009] A mobile platform, on which a spraying mechanism is provided, the spraying mechanism including a power component and two sets of following lifting components symmetrically arranged on the mobile platform, the following lifting components being connected to the power component;

[0010] A rotating component is fixed at one end of the power assembly away from the moving platform. Two sliders are symmetrically arranged on the rotating component. An elastic component connects the sliders to the rotating component. The sliders are also connected to the following lifting component through a connecting component. When the power assembly is activated, the two sliders can move away from each other to drive the following lifting component to move.

[0011] A water tank is also installed on the mobile platform. A water pump installed on the mobile platform can pump water from the water tank to the end of the following lifting assembly. The water inlet of the water pump is connected to a flow regulating assembly installed in the water tank and connected to the connecting assembly.

[0012] As a further embodiment of the present invention: the power assembly includes a drive device fixedly mounted on the moving platform, the output shaft of the drive device passing through the moving platform and connected to a first gear, the first gear meshing with two second gears rotatably mounted on the moving platform, and the second gears connected to the following lifting assembly.

[0013] As a further embodiment of the present invention: the following lifting assembly includes a transmission rod rotatably mounted on the moving platform and fixedly connected to the second gear on the same axis. An extension rod is provided on the transmission rod. A sprayer is rotatably mounted on the end of the extension rod away from the transmission rod. The sprayer is connected to a transmission sleeve slidably sleeved on the transmission rod via a belt.

[0014] The extension rod has a through hole, which slides in conjunction with a guide rod mounted on the moving platform.

[0015] As a further embodiment of the present invention: two limiting blocks are symmetrically installed along the length of the transmission rod, and the limiting blocks are adapted to the limiting grooves formed on the inner wall of the transmission sleeve.

[0016] As a further embodiment of the present invention: the elastic component includes two sliding grooves symmetrically arranged on the rotating part, the sliding grooves are slidably engaged with the slider, and a crossbar slidably connected to the slider is fixed in the sliding groove. A spring is sleeved on the crossbar, one end of the spring is connected to the slider, and the other end is connected to the inner wall of the sliding groove.

[0017] A counterweight is fixed to the upper part of the slider.

[0018] As a further embodiment of the present invention: the connecting assembly includes a vertical shaft coaxially connected to the first gear, a rotating component fixed at the end of the vertical shaft away from the first gear, a lifting sleeve slidably mounted on the vertical shaft, the lifting sleeve being connected to the slider via a connecting rod, and a follower sleeve rotatably mounted on the lifting sleeve, the follower sleeve being connected to a locking component via a mounting plate that penetrates and is mounted on the water tank, the locking component being slidably engaged with an annular groove provided on the transmission sleeve.

[0019] As a further embodiment of the present invention: the flow regulating component includes a pump head disposed in the water tank, the pump head being connected and communicating with the water inlet of the water pump, and a sealing component being disposed inside the pump head, a pull rod being installed on the sealing component, the pull rod passing through the pump head and the water tank, and being connected to the locking component via a push rod.

[0020] As a further embodiment of the present invention: the sealing member is truncated cone-shaped, and the pump head is provided with a conical chamber adapted to the sealing member.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] The set power component can drive the sprayer to rotate and use centrifugal force to disperse the water in all directions to increase the spraying range of the sprayer. At the same time, under the action of the slider, elastic component and connecting component, the sprayer can be controlled to rise when the rotation speed of the rotating part increases, and in coordination with its rotation, the spraying range can be further improved.

[0023] As the rotational speed of the rotating component increases, causing the sprinkler to rise, the opening of the adjusting component will increase accordingly. At this time, the amount of water pumped into the sprinkler increases, thus increasing the water supply as the spraying range of the sprinkler increases, ensuring consistent irrigation for alfalfa per unit area. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of one embodiment of an irrigation device for alfalfa in sandy soil.

[0025] Figure 2 for Figure 1 A magnified schematic diagram of the structure shown in section A.

[0026] Figure 3 This is a schematic diagram of the structure from another angle in one embodiment of an irrigation device for alfalfa in sandy soil.

[0027] Figure 4 This is a schematic diagram of the following lifting component in one embodiment of an irrigation device for alfalfa in sandy soil.

[0028] Figure 5 This is a schematic diagram of the connecting components and the elastic components in one embodiment of an irrigation device for alfalfa in sandy soil.

[0029] Figure 6 This is a schematic diagram of the flow regulation component in one embodiment of an irrigation device for alfalfa in sandy soil.

[0030] Figure 7 This is a schematic diagram of the internal structure of the pump head in one embodiment of an irrigation device for alfalfa in sandy soil.

[0031] In the diagram: 1. Moving platform; 2. Drive unit; 3. Gear No. 1; 4. Gear No. 2; 5. Transmission rod; 6. Transmission sleeve; 7. Extension rod; 8. Sprayer; 9. Belt; 10. Rotating component; 11. Slide groove; 12. Slider; 13. Counterweight; 14. Crossbar; 15. Spring; 16. Connecting rod; 17. Lifting sleeve; 18. Follower sleeve; 19. Engaging component; 20. Annular groove; 21. Push rod; 22. Pull rod; 23. Pump head; 24. Sealing component; 25. Conical chamber; 26. Water pump; 27. Mounting plate; 28. Water tank; 29. ​​Guide rod. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0034] Please see Figures 1-7In this embodiment of the invention, a device for irrigating alfalfa in sandy soil includes:

[0035] A mobile platform 1 is provided with a spraying mechanism. The spraying mechanism includes a power component and two sets of following lifting components symmetrically arranged on the mobile platform 1. The following lifting components are connected to the power component.

[0036] The power assembly includes a drive device 2 fixedly installed on the mobile platform 1. The output shaft of the drive device 2 passes through the mobile platform 1 and is connected to a first gear 3. The first gear 3 meshes with two second gears 4 rotatably installed on the mobile platform 1. The second gears 4 are connected to the following lifting assembly.

[0037] The following lifting assembly includes a transmission rod 5 rotatably mounted on the moving platform 1 and coaxially fixedly connected to the second gear 4. An extension rod 7 is provided on the transmission rod 5. A sprayer 8 is rotatably mounted on the end of the extension rod 7 away from the transmission rod 5. The sprayer 8 is connected to a transmission sleeve 6 slidably sleeved on the transmission rod 5 via a belt 9.

[0038] The extension rod 7 has a through hole, which is slidably engaged with the guide rod 29 provided on the moving platform 1;

[0039] Two limiting blocks are symmetrically installed along the length of the transmission rod 5, and the limiting blocks are adapted to the limiting grooves opened on the inner wall of the transmission sleeve 6.

[0040] In use, the control drive device 2 operates, driving the first gear 3 connected to its output shaft to rotate. The two second gears 4, set on the moving platform 1, are meshed with the first gear 3, causing the second gears 4 to rotate. The circumferential diameter of the second gears 4 is larger than that of the first gear 3, resulting in a lower load on the drive device 2 when the second gears 4 rotate. When the second gears 4 rotate, they drive the transmission rod 5 to rotate, which, under the action of the limiting block and the limiting groove, drives the transmission sleeve 6 to rotate. This, in turn, drives the sprayer 8 to perform circular motion via the belt 9. During the spraying process of the sprayer 8, the rotation of the sprayer 8 can use centrifugal force to spread the water in all directions, thereby expanding its spraying range. At the same time, the speed of the drive device 2 is adjustable. When the speed of the drive device 2 increases, the speed of the sprayer 8 also increases. The higher the speed of the sprayer 8, the greater the centrifugal force generated, and the wider the water dispersion range. Through the above settings, the spraying range of the sprayer 8 can be adjusted.

[0041] Furthermore, one end of the extension rod 7 is slidably sleeved on the transmission rod 5 via the transmission sleeve 6, and the extension rod 7 is slidably mounted on the guide rod 29 at a position away from the end, which makes the sprayer 8 more stable when rotating or the extension rod 7 is raised or lowered.

[0042] Please see Figure 5 The power component is fixed with a rotating component 10 at one end away from the moving platform 1. Two sliders 12 are symmetrically arranged on the rotating component 10. An elastic component connects the sliders 12 and the rotating component 10. The sliders 12 are also connected to the following lifting component through a connecting component. When the power component is activated, the two sliders 12 can move away from each other to drive the following lifting component to move.

[0043] The elastic component includes two sliding grooves 11 symmetrically arranged on the rotating part 10. The sliding grooves 11 are slidably engaged with the slider 12, and a crossbar 14 slidably connected to the slider 12 is fixed in the sliding groove 11. A spring 15 is sleeved on the crossbar 14. One end of the spring 15 is connected to the slider 12, and the other end is connected to the inner wall of the sliding groove 11.

[0044] A counterweight 13 is fixed to the upper part of the slider 12;

[0045] The connecting assembly includes a vertical shaft coaxially connected to the first gear 3. A rotating component 10 is fixed to one end of the vertical shaft away from the first gear 3. A lifting sleeve 17 is also slidably mounted on the vertical shaft. The lifting sleeve 17 is connected to the slider 12 through a connecting rod 16. A follower sleeve 18 is rotatably mounted on the lifting sleeve 17. The follower sleeve 18 is connected to a locking component 19 through a mounting plate 27 that is mounted through the water tank 28. The locking component 19 is slidably engaged with an annular groove 20 provided on the transmission sleeve 6.

[0046] When gear 3 rotates, it drives the vertical shaft connected to it to rotate, and drives the rotating part 10 to make a circular motion. In the initial state, spring 15 drives the two sliders 12 to stick to the side wall of the slide groove 11 near the rotating part 10. When the rotating part 10 rotates with the vertical shaft, the sliders 12 and the counterweight 13 will generate centrifugal force. Under the action of centrifugal force, the two sliders 12 and the counterweight 13 will move towards the end of the rotating part 10 away from the vertical shaft. And through the connecting rod 16, the lifting sleeve 17 will be pulled upward. One end of the connecting rod 16 is rotatably connected to the slider 12, and the other end is rotatably connected to the lifting sleeve 17. When the lifting sleeve 17 moves upward, it will drive the follower sleeve 18 rotatably connected to it to rise, and cause the locking part 19 to rise. The locking part 19 is rotatably connected to the transmission sleeve 6, thereby driving the transmission sleeve 6 together with the extension rod 7 to rise, so that the height of the sprayer 8 increases. With the rotation of the sprayer 8, the water spraying range can be increased.

[0047] Through the above settings, the rotation and lifting of the sprayer 8 are synchronized. These two actions, based on the rotation speed of the drive device 2, make the spraying range of the sprayer 8 adjustable during operation.

[0048] Please see Figure 6 , Figure 7 The mobile platform 1 is also equipped with a water tank 28. A water pump 26 installed on the mobile platform 1 can pump water from the water tank 28 to the end of the following lifting assembly. The inlet of the water pump 26 is connected to a flow regulating assembly installed in the water tank 28 and connected to the connecting assembly.

[0049] The flow regulating component includes a pump head 23 disposed in the water tank 28. The pump head 23 is connected and in communication with the inlet of the water pump 26. A sealing member 24 is disposed inside the pump head 23. A pull rod 22 is installed on the sealing member 24. The pull rod 22 passes through the pump head 23 and the water tank 28, and is connected to the locking member 19 through a push rod 21.

[0050] The sealing element 24 is truncated cone-shaped, and the pump head 23 is provided with a conical chamber 25 that is adapted to the sealing element 24.

[0051] When the drive unit 2 is working, the water pump 26 works synchronously, pumping water from the water tank 28 to the two sprayers 8. In the initial state, there is a certain gap between the sealing member 24 and the inner wall of the conical chamber 25. At this time, the water pump 26 can pump water through the gap to the sprayers 8. As the rotation speed of the drive unit 2 increases, the rotation speed and height of the sprayers 8 will increase, and the spraying range will also increase. During this process, the lifting sleeve 17 rises, driving the locking member 19 to rise. When the locking member 19 rises, it will drive the push rod 21 toward the pump via the pull rod 22. The external movement of head 23 drives the sealing member 24 to move, making the gap between the sealing member 24 and the conical chamber 25 larger. At this time, the water pump 26 pumps more water in the same amount of time. This is mainly because if the water pump 26 pumps the same amount of water into the sprinkler 8, if the spraying range of the sprinkler 8 increases, it may lead to insufficient irrigation of alfalfa per unit area. That is, through the above setting, when the spraying range of the sprinkler 8 increases, the water pump 26 pumps more water into the sprinkler 8, so that the water volume per unit area of ​​alfalfa irrigation is the same.

[0052] It should be noted that the power of the water pump 26 is constant, and the slope of the inner wall in the cross-sectional view of the conical chamber 25 is small, so that the water volume adjustment is slower and more stable, while avoiding the inability to achieve adjustment due to the excessive intermittent change rate between the conical chamber 25 and the sealing component 24.

[0053] In summary, during use, the control drive device 2 operates, driving the first gear 3 connected to its output shaft to rotate. The two second gears 4 mounted on the moving platform 1 maintain meshing with the first gear 3, causing the second gears 4 to rotate. The circumferential diameter of the second gear 4 is larger than that of the first gear 3, resulting in a lower load on the drive device 2 when the second gear 4 rotates. When the second gear 4 rotates, it drives the transmission rod 5 to rotate, which, under the action of the limiting block and limiting groove, drives the transmission sleeve 6 to rotate. This, in turn, drives the sprayer 8 to perform circular motion via the belt 9. During the spraying process, the rotation of the sprayer 8 utilizes centrifugal force to disperse the water in all directions, thus expanding its spraying range. Simultaneously, the rotation speed of the drive device 2 is adjustable. As the rotation speed of the drive device 2 increases, the rotation speed of the sprayer 8 also increases. The higher the rotation speed of the sprayer 8, the greater the centrifugal force generated, and the wider the water dispersion range. Through the above settings, the spraying range of the sprayer 8 can be adjusted.

[0054] Furthermore, one end of the extension rod 7 is slidably sleeved on the transmission rod 5 via the transmission sleeve 6, and the extension rod 7 is slidably mounted on the guide rod 29 at a position away from the end, which makes the sprayer 8 more stable when rotating or the extension rod 7 is raised or lowered.

[0055] When gear 3 rotates, it drives the vertical shaft connected to it to rotate, and drives the rotating part 10 to make a circular motion. In the initial state, spring 15 drives the two sliders 12 to stick to the side wall of the slide groove 11 near the rotating part 10. When the rotating part 10 rotates with the vertical shaft, the sliders 12 and the counterweight 13 will generate centrifugal force. Under the action of centrifugal force, the two sliders 12 and the counterweight 13 will move towards the end of the rotating part 10 away from the vertical shaft. And through the connecting rod 16, the lifting sleeve 17 will be pulled upward. One end of the connecting rod 16 is rotatably connected to the slider 12, and the other end is rotatably connected to the lifting sleeve 17. When the lifting sleeve 17 moves upward, it will drive the follower sleeve 18 rotatably connected to it to rise, and cause the locking part 19 to rise. The locking part 19 is rotatably connected to the transmission sleeve 6, thereby driving the transmission sleeve 6 together with the extension rod 7 to rise, so that the height of the sprayer 8 increases. With the rotation of the sprayer 8, the water spraying range can be increased.

[0056] Through the above settings, the rotation and lifting of the sprayer 8 are synchronized. These two actions, based on the rotation speed of the drive device 2, make the spraying range of the sprayer 8 adjustable during operation.

[0057] When the drive unit 2 is working, the water pump 26 works synchronously, pumping water from the water tank 28 to the two sprayers 8. In the initial state, there is a certain gap between the sealing member 24 and the inner wall of the conical chamber 25. At this time, the water pump 26 can pump water through the gap to the sprayers 8. As the rotation speed of the drive unit 2 increases, the rotation speed and height of the sprayers 8 will increase, and the spraying range will also increase. During this process, the lifting sleeve 17 rises, driving the locking member 19 to rise. When the locking member 19 rises, it will drive the push rod 21 toward the pump via the pull rod 22. The external movement of head 23 drives the sealing member 24 to move, making the gap between the sealing member 24 and the conical chamber 25 larger. At this time, the water pump 26 pumps more water in the same amount of time. This is mainly because if the water pump 26 pumps the same amount of water into the sprinkler 8, if the spraying range of the sprinkler 8 increases, it may lead to insufficient irrigation of alfalfa per unit area. That is, through the above setting, when the spraying range of the sprinkler 8 increases, the water pump 26 pumps more water into the sprinkler 8, so that the water volume per unit area of ​​alfalfa irrigation is the same.

[0058] It should be noted that the power of the water pump 26 is constant, and the slope of the inner wall in the cross-sectional view of the conical chamber 25 is small, so that the water volume adjustment is slower and more stable, while avoiding the inability to achieve adjustment due to the excessive intermittent change rate between the conical chamber 25 and the sealing component 24.

[0059] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0060] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An irrigation device for alfalfa in sandy soil, characterized in that, include: A mobile platform (1) is provided with a spraying mechanism. The spraying mechanism includes a power component and two sets of following lifting components symmetrically arranged on the mobile platform (1). The following lifting components are connected to the power component. A rotating component (10) is fixed at one end of the power assembly away from the moving platform (1). Two sliders (12) are symmetrically arranged on the rotating component (10). An elastic component connects the sliders (12) and the rotating component (10). The sliders (12) are also connected to the following lifting component through a connecting component. When the power assembly moves, the two sliders (12) can move away from each other to drive the following lifting component to move. A water tank (28) is also installed on the mobile platform (1). A water pump (26) installed on the mobile platform (1) can pump the water in the water tank (28) to the end of the following lifting assembly. The inlet of the water pump (26) is connected to a flow regulating assembly installed in the water tank (28) and connected to the connecting assembly. The power assembly includes a drive device (2) fixedly mounted on the mobile platform (1). The output shaft of the drive device (2) passes through the mobile platform (1) and is connected to a first gear (3). The first gear (3) meshes with two second gears (4) rotatably mounted on the mobile platform (1). The second gears (4) are connected to the following lifting assembly. The following lifting assembly includes a transmission rod (5) rotatably mounted on the moving platform (1) and coaxially fixedly connected to the second gear (4). An extension rod (7) is provided on the transmission rod (5). A sprayer (8) is rotatably mounted on one end of the extension rod (7) away from the transmission rod (5). The sprayer (8) is connected to a transmission sleeve (6) slidably sleeved on the transmission rod (5) via a belt (9). The extension rod (7) has a through hole, which is slidably engaged with the guide rod (29) provided on the moving platform (1); The connecting assembly includes a vertical shaft coaxially connected to the first gear (3), a rotating part (10) fixed at one end of the vertical shaft away from the first gear (3), a lifting sleeve (17) slidably mounted on the vertical shaft, the lifting sleeve (17) being connected to the slider (12) via a connecting rod (16), and a follower sleeve (18) rotatably mounted on the lifting sleeve (17), the follower sleeve (18) being connected to a locking member (19) via a mounting plate (27) that passes through and is mounted on the water tank (28), the locking member (19) being slidably engaged with an annular groove (20) provided on the transmission sleeve (6); The flow regulating component includes a pump head (23) disposed in the water tank (28), the pump head (23) being connected and communicating with the inlet of the water pump (26), and a sealing component (24) disposed inside the pump head (23), a pull rod (22) being installed on the sealing component (24), the pull rod (22) passing through the pump head (23) and the water tank (28), and being connected to the locking component (19) through a push rod (21).

2. The irrigation device for alfalfa in sandy soil according to claim 1, characterized in that, The transmission rod (5) is symmetrically equipped with two limiting blocks along its length direction. The limiting blocks are adapted to the limiting grooves opened on the inner wall of the transmission sleeve (6).

3. The irrigation device for alfalfa in sandy soil according to claim 1, characterized in that, The elastic component includes two sliding grooves (11) symmetrically arranged on the rotating part (10). The sliding grooves (11) are slidably engaged with the slider (12), and a crossbar (14) slidably connected to the slider (12) is fixed inside the sliding groove (11). A spring (15) is sleeved on the crossbar (14). One end of the spring (15) is connected to the slider (12), and the other end is connected to the inner wall of the sliding groove (11). A counterweight (13) is fixed to the upper part of the slider (12).

4. The irrigation device for alfalfa in sandy soil according to claim 1, characterized in that, The sealing element (24) is frustoconical, and the pump head (23) is provided with a conical chamber (25) adapted to the sealing element (24).

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