Gravity operated automatic irrigation device

Abstract

The present application relates to watering irrigation technical field, disclose a kind of gravity opening and closing type automatic irrigation device, including potting, the potting is located potting pedestal top, the potting pedestal is provided with drainage hole, the drainage hole bottom is provided with flow guide pipe, the lower portion of the potting pedestal is fixedly connected with two vertical elastic devices, the vertical elastic device is fixedly connected with pedestal, the upper portion of the pedestal is provided with floor drain, the potting pedestal and pedestal are fixedly connected with two telescopic rods, the telescopic rod can be up and down telescopic with potting pedestal, the both sides of the pedestal are provided with baffle, the lower portion of the pedestal is provided with four foot disc. Through plant potting only needs to be placed on device tray can realize automatic watering, simultaneously, the hole in the lower portion of tray facilitates excess moisture to flow out, realizes low cost, high reliability, full-automatic sustainable irrigation, especially suitable for family horticulture, agricultural greenhouse and arid region's green plant maintenance.

Description

Technical Field

[0001] This invention relates to the field of irrigation technology, specifically to a gravity-operated automatic irrigation device. Background Technology

[0002] As an independent planting unit, potted plants have become an important medium for homes, offices, scientific research, and improving air quality. However, traditional potted plant irrigation methods rely heavily on regular manual watering, which presents several significant problems: First, human negligence can easily lead to water shortages or overwatering, affecting plant health; second, it is difficult to maintain stable irrigation when traveling or away for extended periods; third, existing automatic irrigation systems (such as electronic timed drip irrigation and soil moisture sensor control) rely on electricity or batteries, resulting in high energy consumption, complex maintenance, and high costs. Furthermore, most gravity irrigation equipment relies on manual adjustment of fixed water storage containers and valves, failing to dynamically respond to the actual water needs of the soil, leading to water waste or uneven irrigation.

[0003] To address the aforementioned problems, this invention proposes a gravity-based automatic irrigation potted plant device. This innovative device achieves closed-loop control of irrigation operation through gravitational potential energy and changes in container weight. Its core principle is as follows: when the overall weight of the potted plant decreases to a threshold due to water evaporation and plant transpiration, reverse gravity triggers the irrigation mechanism to open, allowing externally stored water to flow into the soil under gravity. After watering, the total weight of the potted plant recovers, and gravity automatically shuts off the irrigation, thus achieving a repeated automatic irrigation process. Furthermore, this invention allows for adjustable timing of each automatic irrigation cycle through its mechanical structure, controlling the irrigation period to accommodate differences in drought tolerance among different plants. It also allows for adjustment of the water volume during each automatic irrigation to meet the varying water requirements of different plants, preventing root rot and excessive root moisture that hinders respiration. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a gravity-operated automatic irrigation device to meet the water control needs of a planting unit, changing the current situation of manual periodic watering, and providing convenience and periodicity for the periodic irrigation of a planting unit related to indoor plant cultivation and scientific research.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a gravity-operated automatic irrigation device, comprising a potted plant located above a potted plant base, the potted plant base having a drainage hole, a guide pipe at the bottom of the drainage hole, two vertical elastic devices fixedly connected to the lower part of the potted plant base, the vertical elastic devices being fixedly connected to the base, a floor drain being provided on the upper part of the base, two telescopic rods fixedly connected between the potted plant base and the base, the telescopic rods being able to extend and retract with the potted plant base, baffles being provided on both sides of the base, and four foot plates being provided below the base.

[0006] Preferably, the lower part of the pot base is fixedly connected to the lower U-shaped groove via a central connecting rod, and two limiting rods are connected through the middle of the lower U-shaped groove, with the two limiting rods slidably connected to the upper U-shaped groove.

[0007] Preferably, a connecting plate and a telescopic straight rod are fixedly connected to the side of the upper U-shaped groove, the telescopic straight rod is fixedly connected to the horizontal slider, and the horizontal slider is slidably connected to the horizontal slide rail.

[0008] Preferably, a rack is fixedly connected to the upper part of the horizontal slider, the rack is meshed with an adjacent quarter gear, the quarter gear is fixedly connected to the central shaft, a ball valve is provided on the upper part of the central shaft, the ball valve is located inside the water outlet pipe, the water outlet pipe is connected to the water storage tank, and multiple pillars and platform frame are fixedly connected to the lower part of the water storage tank for support.

[0009] Preferably, the side of the lower U-shaped groove is fixedly connected to the strip slider by a connecting rod, the strip slider is slidably connected to two vertical limiting rods, and the two vertical limiting rods are fixedly connected to the base below and the fixing block above.

[0010] Preferably, the side of the upper U-shaped groove is fixedly connected to the control rod by a connecting plate, and the other end of the control rod is limited by a strip limiting plate and a semi-circular limiting plate, wherein the strip limiting plate is fixedly connected to the base.

[0011] Preferably, the side of the semi-circular limiting plate is fixedly connected to the vertical slider, and one side of the baffle is fixedly connected to the vertical slide rail, with a locking switch device provided on the vertical slide rail.

[0012] Preferably, a second limiting rod is provided inside the semi-circular limiting plate, the second limiting rod is rotatably connected to the semi-circular limiting plate, and a locking switch device is also provided on the second limiting rod.

[0013] Preferably, a vertical limiting rod is provided on the inner side of the semi-circular limiting plate, and a one-way plate is provided on the semi-circular limiting plate.

[0014] Preferably, a horizontal elastic device is provided on the control rod, and the horizontal elastic device is fixedly connected to a side baffle.

[0015] This invention provides a gravity-operated automatic irrigation device. It has the following advantages:

[0016] 1. This invention enables automatic watering of potted plants simply by placing them on the device's tray. It requires no complex design, and holes at the bottom of the tray facilitate the drainage of excess water. The entire process requires no sensors, electricity, or complex mechanical structures, achieving low-cost, highly reliable, fully automatic, and sustainable irrigation. It is particularly suitable for home gardening, agricultural greenhouses, and plant care in arid regions.

[0017] 2. This invention achieves automatic irrigation by placing a potted plant on a potting base and relying on gravity, a vertical elastic device, and the coordinated operation of a series of mechanical structures. When the water content of the potted plant decreases and its weight is reduced, the vertical elastic device pushes the potting base upward, the control rod moves upward, and the ball valve opens under the action of the horizontal elastic device and the second limiting rod, allowing water from the storage tank to flow into the potted plant; when the water content increases, the valve closes. The entire process requires no complex electronic equipment or frequent manual operation, greatly saving labor costs.

[0018] 3. This invention allows for flexible adjustment of the irrigation cycle and water volume by adjusting the positions of the semi-circular limiting plate and the second limiting rod. Adjusting the semi-circular limiting plate downwards via the vertical slider shortens the distance between the control rod and the rotation axis of the second limiting rod, allowing the control rod to reach the critical point more quickly to initiate irrigation, meeting the needs of plants with frequent water requirements. Conversely, adjusting the vertical limiting rod downwards extends the irrigation cycle, adapting to drought-tolerant plants. Simultaneously, rotating the second limiting rod changes the sliding distance of the control rod and its angle with the horizontal. By utilizing the fixed horizontal displacement of the vertical limiting rod, the vertical displacement distance of the control rod is changed, thereby adjusting the water volume. This avoids water waste, ensures that plants with different water requirements receive appropriate moisture, promotes healthy plant growth, improves water resource utilization efficiency, and reduces the probability of plant death due to improper watering. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention;

[0020] Figure 2 This is a schematic diagram of the main structure of the present invention;

[0021] Figure 3 This is a schematic diagram of one side of the limiting structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the other side of the limiting structure of the present invention;

[0023] Figure 5 This is a schematic diagram of the irrigation structure of the present invention.

[0024] The components include: 1. Potted plant; 2. Potted plant base; 3. Drainage hole; 4. Vertical elastic device; 5. Base; 6. Telescopic rod; 7. Baffle; 8. Foot plate; 9. Central connecting rod; 10. Lower U-shaped groove; 11. Limiting rod one; 12. Upper U-shaped groove; 13. Connecting plate; 14. Telescopic straight rod; 15. Horizontal slider; 16. Rack; 17. 1 / 4 gear; 18. Central shaft; 19. Ball valve; 20. Water outlet pipe; 21. Water storage tank; 2. Support column; 23. Platform frame; 24. Connecting rod; 25. Strip slider; 26. Vertical limit rod; 27. Fixing block; 28. Control rod; 29. ​​Strip limit plate; 30. Semi-circular limit plate; 31. Vertical slider; 32. Vertical slide rail; 33. Locking switch device; 34. Limit rod two; 35. Vertical limit rod; 36. One-way plate; 37. Horizontal elastic device; 38. Drainage pipe; 39. Floor drain; 40. Horizontal slide rail. Detailed Implementation

[0025] The technical solutions in 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.

[0026] Please see the appendix Figure 1 -Appendix Figure 5This invention provides a gravity-operated automatic irrigation device, including a potted plant 1 located above a potted plant base 2. The potted plant base 2 has a drainage hole 3, and a guide pipe 38 is provided at the bottom of the drainage hole 3. Two vertical elastic devices 4 are fixedly connected to the bottom of the potted plant base 2, and the vertical elastic devices 4 are fixedly connected to a base 5. A floor drain 39 is provided on the upper part of the base 5. Two telescopic rods 6 are fixedly connected between the potted plant base 2 and the base 5. The telescopic rods 6 can extend and retract with the potted plant base 2. Baffles 7 are provided on both sides of the base 5, and four foot plates 8 are provided below the base 5. The lower part of the potted plant base 2 is fixedly connected to a lower U-shaped groove 10 through a central connecting rod 9. Two limiting rods 11 pass through the middle of the lower U-shaped groove 10 and are slidably connected to an upper U-shaped groove 12. A connecting plate 13 and a telescopic straight rod 14 are fixedly connected to the side of the upper U-shaped groove 12. The telescopic straight rod 14 is fixedly connected to a horizontal slider 15, and the horizontal slider 15 is slidably connected to a horizontal slide rail 40. A rack 16 is fixedly connected to the upper part of the horizontal slider 15. The rack 16 meshes with the adjacent quarter gear 17, which is fixedly connected to the central shaft 18. A ball valve 19 is installed on the upper part of the central shaft 18. The ball valve 19 is located inside the water outlet pipe 20, which is connected to the water storage tank 21. The lower part of the water storage tank 21 is fixedly connected to multiple support columns 22 and a platform frame 23 for support. The side of the lower U-shaped groove 10 is fixedly connected to the strip slider 25 via a connecting rod 24. The strip slider 25 is slidably connected to two vertical limit rods 26. The two vertical limit rods 26 are fixedly connected to the lower base 5 and the upper fixing block 27. The side of the upper U-shaped groove 12 is fixedly connected to the control rod 28 via a connecting plate 13. The other end of the control rod 28 is limited by a strip limit plate 29 and a semi-circular limit plate 30. The strip limit plate 29 is fixedly connected to the base 5. The semi-circular limiting plate 30 is fixedly connected to the vertical slider 31 on its side, and a side baffle 7 is fixedly connected to the vertical slide rail 32. A locking switch device 33 is provided on the vertical slide rail 32. A second limiting rod 34 is provided inside the semi-circular limiting plate 30, and the second limiting rod 34 is rotatably connected to the semi-circular limiting plate 30. A locking switch device 33 is also provided on the second limiting rod 34. A vertical limiting rod 35 is provided on the inner side of the semi-circular limiting plate 30, and a one-way plate 36 is provided on the semi-circular limiting plate 30. A horizontal elastic device 37 is provided on the control rod 28, and the horizontal elastic device 37 is fixedly connected to the side baffle 7.

[0027] This invention is based on the principle of gravity-driven opening and closing. The valve is opened to water the plant by the weight change caused by the consumption of water in the pot unit, and the valve is closed to stop watering as the weight of the water increases, thus achieving the effect of automatic opening and closing.

[0028] Specifically, the potted plant base 2 is fixedly connected to the vertical elastic device 4, the lower U-shaped groove 10, and the strip slider 25, allowing the entire structure to move up and down with the vertical elastic device 4. The upper U-shaped groove 12 is fixedly connected to the control rod 28 and to the horizontal slider 15 via a telescopic rod 14. The upper U-shaped groove 12 is located above the lower U-shaped groove 10 and is slidably connected to the interior of the lower U-shaped groove 10, allowing the upper U-shaped groove 12 to move left and right, and also to move up and down based on the lower U-shaped groove 10. The left and right movement of the horizontal slider 15 can open and close the ball valve 19 to control the water flow. The movement of the entire device is restricted by the position of the control lever 28. The control lever 28 is constrained by the inside of the strip-shaped limit plate 29 and the semi-circular limit plate 30. When the control lever 28 is below the rotation axis (critical point) of the second limit lever 34, it cannot move horizontally and cannot open the valve to fill water. When the control lever 28 is above the rotation axis (critical point) of the second limit lever 34, it drives the rack 16 to move horizontally and open the valve to fill water.

[0029] Furthermore, firstly, the potted plant unit 1, which has been fully watered, is placed on the potted plant base 2. The gravity compression vertical elastic device 4 causes the potted plant unit 1 to descend. The connected control rod 28 opens the one-way plate 36 and moves it downward below the critical point, entering the non-watering stage.

[0030] Furthermore, as the overall moisture content of the potted plant unit decreases, the control lever 28 gradually moves upward until it reaches the position of the rotation axis (critical point) of the control lever 28. The pulling force of the horizontal elastic device 37 and the supporting force of the upper part of the limit rod 34 will cause the control lever 28 to slide obliquely upward along the upper part of the limit rod 34, pushing the water in. When the horizontal sliding distance reaches 30mm, it is stopped by the vertical limit rod 35. At this time, the rack 16 on the horizontal slider 15 also moves 30mm to the right, driving the 1 / 4 gear 17 to open the ball valve 19 switch, allowing water to flow from the water storage tank 21 into the potted plant unit to start watering. At this time, it is in the initial watering stage.

[0031] Furthermore, as the water content in the potted plant unit increases, leading to increased gravity, the control lever 28 slides diagonally downwards along the upper part of the limit lever 34. When it reaches below the critical point, the valve is closed, stopping watering; this is the water-stopping stage. At this time, the horizontal elastic device 37 also provides an upward force to the control lever 28 through pulling and supporting forces, delaying watering. The effect is that when the control lever 28 returns to the critical point, the overall weight of the potted plant unit is greater than at the start of the watering stage, achieving the purpose of watering. Excess water flows out from the bottom of the potted plant unit and is discharged through the drain pipe 38 to the floor drain 39, at which point one watering cycle ends.

[0032] Since different potted crops have different water requirements and irrigation cycles, the irrigation cycle and irrigation volume can be adjusted by adjusting the position of the semi-circular limiting plate 30 and the limiting rod 34.

[0033] Specifically, the watering cycle: the semi-circular limit plate 30 can move up and down through the connected vertical slider 31, and a locking switch device 33 is provided to lock the position of the semi-circular limit plate 30. Therefore, the distance between the control rod 28 and the rotation axis of the limit rod 34 will change accordingly, so the time to start watering each time can be varied. If more frequent watering is required, the semi-circular limit plate 30 can be adjusted downwards. If the watering cycle needs to be longer, the semi-circular limit plate 30 can be adjusted upwards.

[0034] Furthermore, regarding watering volume: Watering begins when control rod 28 reaches the rotation axis of limit rod 34. At this time, control rod 28 will slide obliquely upward along the upper part of limit rod 34. If limit rod 34 is rotated, the sliding distance of control rod 28 will change accordingly, and the angle between limit rod 34 and the horizontal will also change accordingly. Due to the vertical limit rod 35, the horizontal displacement distance of control rod 28 is 30mm. In the right-angled triangle of control rod 28 displacement, the horizontal right-angle side remains unchanged, and the vertical right-angle side is 30tanα. Therefore, the vertical right-angle side changes accordingly, that is, the vertical displacement distance of control rod 28 changes accordingly. The vertical displacement distance is related to the water in the entire potted plant unit 1 device. Watering volume can be increased by increasing the overall vertical displacement of potted plant unit 1 by rotating limit rod 34 counterclockwise, and watering volume can be reduced by decreasing the overall vertical displacement of potted plant unit 1 by rotating limit rod 34 clockwise. Meanwhile, the limiting rod 34 has a locking switch device 33 that can lock the position of the limiting rod 34, thus achieving a fixed effect.

[0035] Working principle: First, a fully watered potted plant 1 is placed on the potted plant base 2. At this time, the weight of the potted plant 1 acts on the vertical elastic device 4, compressing it. Since the potted plant base 2 is fixedly connected to the vertical elastic device 4, the lower U-shaped groove 10, and the strip slider 25, the whole structure will descend as the vertical elastic device 4 is compressed. At the same time, the control rod 28 connected to the potted plant base 2 will also move downwards. The movement of the control rod 28 causes the one-way plate 36 to open until the control rod 28 moves below the rotation axis (critical point) of the limit rod 34. At this time, the entire device is in the non-watering stage.

[0036] As time passes, the water content in potted plant 1 gradually decreases due to transpiration and natural evaporation, thus reducing the overall weight of potted plant 1. Because the vertical elastic device 4 is elastic, as the weight of potted plant 1 decreases, it pushes the potted plant base 2 and the potted plant 1 upwards, and the connected control rod 28 also gradually moves upwards. When the control rod 28 reaches the position of the rotation axis (critical point) of the limit rod 34, the pulling force of the horizontal elastic device 37 and the supporting force of the upper part of the limit rod 34 begin to take effect. Under the combined action of these two forces, the control rod 28 slides obliquely upwards along the upper part of the limit rod 34.

[0037] As the control lever 28 slides diagonally upwards, the upper U-shaped groove 12, connected to it via the connecting plate 13 and the telescopic rod 14, also moves. Since the upper U-shaped groove 12 is fixedly connected to the horizontal slider 15, and the horizontal slider 15 is slidably connected to the horizontal slide rail 40, the movement of the upper U-shaped groove 12 causes the horizontal slider 15 to slide on the horizontal slide rail 40. When the horizontal distance of the control lever 28 reaches 30mm, it is stopped by the vertical limit rod 35. At this time, the rack 16 on the horizontal slider 15 also moves 30mm to the right. Because the rack 16 is meshed with the adjacent quarter gear 17, and the quarter gear 17 is fixedly connected to the central shaft 18, the movement of the rack 16 causes the quarter gear 17 to rotate, thereby causing the central shaft 18 to rotate. A ball valve 19 is installed on the upper part of the central shaft 18. The ball valve 19 is located inside the water outlet pipe 20, which is connected to the water storage tank 21. The rotation of the central shaft 18 will open the ball valve 19. Under the action of gravity, the water in the water storage tank 21 flows into the potted plant unit 1 through the water outlet pipe 20. At this time, the device enters the watering stage.

[0038] As water continuously flows into potted plant 1, its weight gradually increases, and the gravity also increases, causing control lever 28 to slide diagonally downwards along the upper part of limit lever 34. When control lever 28 reaches below the rotation axis (critical point) of limit lever 34, valve (ball valve 19) is closed, stopping water flow into potted plant 1, and the device enters the water-stopping phase. At this time, the horizontal elastic device 37 has another important function: it provides an upward resultant force to control lever 28 through tension and support, which delays the next watering time. The effect of this is that when control lever 28 returns to the critical point, the overall weight of potted plant 1 is greater than at the beginning of the watering phase, ensuring that potted plant 1 receives more water and achieves a better irrigation effect.

[0039] During the entire irrigation process, excess water will flow out from the drainage hole 3 at the bottom of the pot 1. The guide pipe 38 at the bottom of the drainage hole 3 will guide this excess water to the drain 39 on the upper part of the base 5, thereby avoiding water accumulation and causing adverse effects on the potted plant 1, and completing a full watering cycle.

[0040] The semi-circular limiting plate 30 is fixedly connected to the vertical slider 31, which can move up and down on the vertical slide rail 32. A locking switch 33 is installed on the vertical slide rail 32 to lock the position of the semi-circular limiting plate 30. When the position of the semi-circular limiting plate 30 changes, the distance between the control rod 28 and the rotation axis of the limiting rod 34 also changes. If more frequent water filling is required, the semi-circular limiting plate 30 can be adjusted downwards, making it easier for the control rod 28 to reach the critical point, thus shortening the time interval between each water filling start; conversely, if a longer water filling cycle is desired, the semi-circular limiting plate 30 can be adjusted upwards.

[0041] The water volume is adjusted by rotating the second limiting rod 34. When the control rod 28 reaches the rotation axis of the second limiting rod 34 to begin water filling, the control rod 28 will slide obliquely upward along the upper part of the second limiting rod 34. If the second limiting rod 34 is rotated, the sliding distance of the control rod 28 and the angle between the second limiting rod 34 and the horizontal will change. Since the vertical limiting rod 35 fixes the horizontal displacement distance of the control rod 28 to 30mm, in the right triangle formed by the displacement of the control rod 28, the horizontal right-angle side remains unchanged, and the vertical right-angle side is 30tanα (α is the angle between the second limiting rod 34 and the horizontal). Therefore, as the angle changes, the vertical right-angle side will also change, that is, the vertical displacement distance of the control rod 28 will change accordingly. The vertical displacement distance of the control lever 28 is related to the water content in the entire potted plant unit 1. By rotating the limit lever 34 counterclockwise, the overall vertical displacement of the potted plant unit 1 can be increased, thereby increasing the water volume; rotating the limit lever 34 clockwise will decrease the overall vertical displacement of the potted plant unit 1, thus reducing the water volume. At the same time, a locking switch device 33 is also provided on the limit lever 34. After adjusting the water volume, the position of the limit lever 34 can be locked to ensure that the water volume remains stable for each irrigation.

[0042] In summary, this device utilizes gravity changes to achieve automatic irrigation and can flexibly adjust the irrigation cycle and amount according to the needs of different potted crops, effectively solving the problems of traditional potted plant irrigation methods and providing a convenient and efficient water control solution for indoor plant cultivation and scientific research.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations 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.

Claims

1. A gravity-operated automatic irrigation device, characterized in that, Includes a potted plant (1), the potted plant (1) is located above the potted plant base (2), the potted plant base (2) is provided with a drainage hole (3), the bottom of the drainage hole (3) is provided with a guide pipe (38), the lower part of the potted plant base (2) is fixedly connected to two vertical elastic devices (4), the vertical elastic devices (4) are fixedly connected to the base (5), the upper part of the base (5) is provided with a floor drain (39), the potted plant base (2) and the base (5) are fixedly connected to two telescopic rods (6), the telescopic rods (6) extend and retract with the potted plant base (2), the base (5) is provided with baffles (7) on both sides, and the base (5) is provided with four foot plates (8) below the base (5); The lower part of the pot base (2) is fixedly connected to the lower U-shaped groove (10) by the central connecting rod (9). Two limiting rods (11) are connected through the middle of the lower U-shaped groove (10), and the two limiting rods (11) are slidably connected to the upper U-shaped groove (12). A connecting plate (13) and a telescopic rod (14) are fixedly connected to the side of the upper U-shaped groove (12). The telescopic rod (14) is fixedly connected to the horizontal slider (15), and the horizontal slider (15) is slidably connected to the horizontal slide rail (40). A rack (16) is fixedly connected to the upper part of the horizontal slider (15). The rack (16) is meshed with the adjacent 1 / 4 gear (17). The 1 / 4 gear (17) is fixedly connected to the central shaft (18). A ball valve (19) is provided on the upper part of the central shaft (18). The ball valve (19) is located inside the water outlet pipe (20). The water outlet pipe (20) is connected to the water storage tank (21). The lower part of the water storage tank (21) is fixedly connected to multiple support columns (22) and platform frame (23) for support. The upper U-shaped groove (12) is fixedly connected to the control rod (28) by a connecting plate (13) on the side. The other end of the control rod (28) is limited by a strip limiting plate (29) and a semi-circular limiting plate (30). The strip limiting plate (29) is fixedly connected to the base (5). The side of the semi-circular limiting plate (30) is fixedly connected to the vertical slider (31), and the baffle (7) on one side is fixedly connected to the vertical slide rail (32). A locking switch device (33) is provided on the vertical slide rail (32). The semi-circular limiting plate (30) is provided with a second limiting rod (34) inside. The second limiting rod (34) is rotatably connected to the semi-circular limiting plate (30). A locking switch device (33) is also provided on the second limiting rod (34). A horizontal elastic device (37) is provided on the control lever (28), and the horizontal elastic device (37) is fixedly connected to a side baffle (7).

2. The gravity-operated automatic irrigation device according to claim 1, characterized in that, The side of the lower U-shaped groove (10) is fixedly connected to the strip slider (25) by a connecting rod (24). The strip slider (25) is slidably connected to two vertical limiting rods (26). The two vertical limiting rods (26) are fixedly connected to the base (5) below and the fixing block (27) above.

3. The gravity-operated automatic irrigation device according to claim 1, characterized in that, A vertical limiting rod (35) is provided on the inner side of the semi-circular limiting plate (30), and a one-way plate (36) is provided on the semi-circular limiting plate (30).

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