Farmland water level automatic regulation and control device

Abstract

The invention discloses an automatic farmland water level regulation and control device, and relates to the technical field of planting management, the automatic farmland water level regulation and control device comprises a seat plate, a limiting column is fixedly mounted on the upper surface of the seat plate, a lifting sliding block is slidably arranged in the limiting column, one side of the lifting sliding block is connected with a balance regulation mechanism, and the balance regulation mechanism is connected with the lifting sliding block when the water level in a rice field is higher or lower than a set standard value. The automatic drainage system exists at any time, the automatic water replenishing system performs timing detection and timing water replenishing, the rice field water level has fall due to multiple effects, and if the water replenishing system is started and stopped in real time according to the liquid level, the electric control system is frequently started and stopped in a large probability; therefore, falling deviation of the rice field liquid level is allowed, a timing detection mode is adopted, structural movement self-adaption exists, however, a water pump is controlled by an electric control system to be started and stopped in a timing mode, and therefore the effects that normal operation of a water supplementing system is guaranteed, and electric energy can be saved are achieved.

Description

Technical Field

[0001] This invention relates to the field of planting management technology, specifically to an automatic water level control device for farmland. Background Technology

[0002] Rice stalks are erect, 0.5–1.5 meters tall, with loose leaf sheaths that extend downwards from the base on both sides to form the leaf sheath margins. The panicles are loose, with oblong spikelets that are laterally compressed and contain 3 florets. The lemma of the bisexual florets is often pubescent, awned or awnless, and there are 6 stamens. Rice is one of the most important food crops for humankind, with a long history of cultivation and consumption.

[0003] Rice requires water to varying degrees during its planting, growth, and maturity stages. Typically, a certain water level is maintained in rice paddies to meet the growth needs of rice throughout its various cycles. However, due to rice's demanding water requirements, this also brings a significant workload to farmers and growers.

[0004] Generally, the water level in paddy fields is mainly controlled by farmers through pumping water and digging ditches to drain water (however, since rice is grown outdoors, outdoor conditions are changeable, and pumping water or digging ditches is quite cumbersome). With the development of agriculture in my country, some farmland water level monitoring devices have emerged. However, traditional farmland water level monitoring devices can only automatically replenish or drain water, and cannot simultaneously achieve adaptive replenishment and drainage. Simply put, they cannot achieve a dynamic balance between water supply and drainage, and their ability to adapt to farmland water levels and natural conditions is poor. Therefore, farmers still need to frequently manually adjust the water level as needed, and they cannot accurately adjust the water level flexibly according to the growth needs of rice, resulting in poor adaptability.

[0005] In addition, the original intention of the development of automatic water supply and drainage technology was to reduce human operation and workload, so that farmers would not have to frequently observe the operation on site. However, the existing farmland drainage, whether it is an automatic drainage device or a traditional communicating vessel drainage method, has a problem of relying on manual cleaning. This is mainly because the natural environment of farmland contains a lot of impurities. When the paddy field water is discharged through the pipes, the impurities in the water will collect at the drain outlet filter screen and are difficult to dissipate. In severe cases, the filter screen will be blocked and cannot drain effectively. Therefore, it can only be cleaned manually, which is time-consuming and laborious. From a certain perspective, this is contrary to the original intention of automatic water supply and drainage technology.

[0006] To address the aforementioned problems, this invention proposes an automatic farmland water level control device that can prevent drainage blockage. While achieving dynamic balance between water supply and drainage, it effectively solves the problem of frequent manual cleaning required for blocked drainage pipes. Summary of the Invention

[0007] This invention addresses the problem of overly simplistic solutions in existing technologies by providing a significantly different approach. Specifically, the invention aims to provide an automatic farmland water level control device. This addresses the shortcomings of traditional farmland water level monitoring devices, which can only automatically replenish or drain water, failing to simultaneously adapt to both. In short, they cannot achieve a dynamic balance between water supply and drainage, exhibiting poor adaptability to farmland water levels and natural conditions. Consequently, farmers still need to frequently manually adjust the water level as needed, and the devices cannot precisely and flexibly adjust the water level according to the growth requirements of rice, resulting in poor adaptability.

[0008] To achieve the above objectives, the present invention provides the following technical solution: an automatic farmland water level control device, comprising a base plate, a limiting column fixedly installed on the upper surface of the base plate, and a lifting slider slidably arranged inside the limiting column, a balance adjustment mechanism connected to one side of the lifting slider, and a telescopic rod fixedly connected to the other side of the lifting slider, a water pump fixedly installed in the groove of the base plate, and a solar panel arranged in the shape of an eaves fixedly connected to the upper surface of the base plate through a connecting plate and the limiting column, and an inlet pipe buried inside the field ridge and an outlet pipe located outside the field ridge respectively provided at both ends of the water pump, a T-shaped pipe connected through the lower end of the inlet pipe, and a double valve adaptive opening and closing assembly installed between the T-shaped pipe and the lifting slider; A filter is installed at the opening of the water outlet pipe located outside the field ridge.

[0009] Preferably, the lifting slider is cross-shaped, and the limiting post has a limiting groove that matches the lifting slider and is also cross-shaped.

[0010] Preferably, the balance adjustment mechanism includes a balance plate, a bubble level, a damper, a return spring, a scale rod, a buoyancy block, and an adjusting screw. The balance plate is fixed to one side of the lifting slider. A bubble level is installed inside the balance plate. The base of the damper is fixed to the upper surface of the balance plate, and the telescopic end of the damper is fixed to the lower surface of the solar panel. A return spring is wound around the outer wall of the damper. One end of the return spring is welded to the lower surface of the solar panel, and the other end is fixed to the upper surface of the balance plate. A scale rod is slidably installed through the outer end of the balance plate, and a buoyancy block is fixed to the lower end of the scale rod. An adjusting screw is installed through the interior of the balance plate, and the lower end of the adjusting screw is mounted to a fixing plate on the outer wall of the scale rod via a bearing. A threaded hole matching the thread of the adjusting screw is opened inside the balance plate.

[0011] Preferably, the lower end of the buoyancy block is suspended in the paddy field liquid surface, and the buoyancy of the water on the buoyancy block is in equilibrium with the resistance of the return spring. The bubble level is set to observe the horizontal state of the entire device and the horizon.

[0012] Preferably, a controller is fixedly installed on the upper surface of the seat plate, and a pressure sensor is installed on the upper surface of the controller. A gap is reserved between the telescopic end of the telescopic rod and the pressure sensor. A timer and a battery are fixedly installed on the side of the connecting plate, and the solar panel and the battery are electrically connected. The controller is electrically connected to the pressure sensor, the timer, the battery, and the water pump.

[0013] Preferably, the dual-valve adaptive opening and closing assembly includes a rotating shaft, a valve block, a lever block, a first pull rope, a second pull rope, and a protective buckle plate. The central intersection of the three-way pipes is configured as a hollow disc shape. The rotating shaft is installed through the central intersection of the three-way pipes via a sealed bearing, and the two ends of the rotating shaft are respectively installed through the outer sides of the two ends of the three-way pipes. The two ends of the rotating shaft located on the outer sides of the three-way pipes are centrally symmetrically connected to lever blocks, and the ends of the two lever blocks are respectively fixed with one end of the first pull rope and one end of the second pull rope. The other ends of the first pull rope and the second pull rope are guided by a guide wheel assembly and then vertically fixed to the upper and lower surfaces of the lifting slider, respectively. The valve block for adaptively closing the three-way pipe is fixed to the outer wall inside the rotating shaft.

[0014] Preferably, the tee pipe consists of four parts: a vertical pipe, two horizontal pipes, and a converging disc. One horizontal pipe opening is located inside the farmland, and the other horizontal pipe opening is located outside the farmland. Filters are installed at both horizontal pipe openings. The valve block has an arc-shaped outer surface that matches the inner wall of the central disc groove of the tee pipe. The valve block also seals the inlet of the vertical pipe of the tee pipe and the inner opening of the horizontal pipe near the outer edge of the field. Rubber sealing sheets that fit the inner wall of the disc groove are evenly distributed between the outer wall of the valve block and the inner wall of the central disc groove of the tee pipe.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention allows for the rotation and adjustment of the screw rod according to the needs of rice growth, thereby adjusting the initial height of the buoyancy block (although rice growth has certain requirements for water level, the cycle is relatively long; simply put, the standard water level may only need to be changed once every few months, so the manual adjustment method adopted in this invention is more in line with reality).

[0016] From a mechanical perspective, in this invention, the forces acting between the buoyancy of the buoyant block, the restoring force of the return spring, and the gravity of the corresponding parts will always remain in equilibrium. When the liquid level remains constant or changes only slightly, the three forces are in static equilibrium. However, when the liquid level changes, the three forces are in dynamic equilibrium. This dynamic equilibrium will eventually be restored to static equilibrium through replenishment and drainage during the balancing motion. Therefore, when the initial height of the buoyant block is manually adjusted, the overall equilibrium still exists, but only the buoyancy changes compared to before adjustment. Thus, after adjusting the buoyant block, replenishment and drainage will automatically occur, and the buoyant block will receive sufficient buoyancy through automatic replenishment and drainage of the water level, thereby achieving re-equilibrium.

[0017] Furthermore, this invention features a three-way pipe with a special structure. By utilizing the adaptive rotation of the valve block, different functional channels can be opened and closed adaptively, thus integrating drainage and water replenishment into one three-way system. The main advantages are: saving labor and materials, eliminating the need for separate drainage and water inlet pipes, and effectively solving the problem that impurities easily adhere to the filter screen at the drainage pipe inlet during drainage. When impurities adhere to the drainage pipe filter screen, due to the integrated water replenishment system, externally replenished water will be injected back into the paddy field through the three-way pipe, thereby dispersing the adhered impurities and creating a cycle.

[0018] The overall effect is that as long as the water level in the paddy field is high or low, the system will automatically perform adaptive replenishment and drainage until the water level returns to the set height. The automatic drainage system is always in operation, while the automatic water replenishment system is timed for detection and replenishment. The water level in the paddy field is affected by multiple factors and there are fluctuations. If the water replenishment system is opened and closed in real time according to the water level, the electrical control system will likely be frequently opened and closed, resulting in energy waste. Therefore, this invention allows for deviations in the water level in the paddy field and adopts a timed detection method. The structural movement is adaptive, but the water pump is controlled by the electrical control system to open and close on a timed basis, thereby achieving the effect of ensuring the normal operation of the water replenishment system while saving energy. Attached Figure Description

[0019] Figure 1 This is a frontal cross-sectional view of the present invention. Figure 2 This is a frontal cross-sectional view of the main structure of the present invention; Figure 3 This is a front cross-sectional view of the main structure of the present invention after the protective buckle plate is removed; Figure 4 For the present invention Figure 2 A schematic diagram of the structure of the control component; Figure 5 This is a top cross-sectional view of the limiting post and lifting slider of the present invention. Figure 6 This is a front view of the T-shaped pipe after the protective buckle plate of the present invention has been removed; Figure 7 This is a schematic diagram of the front cross-sectional structure of the tee pipe of the present invention; Figure 8 This is a frontal cross-sectional view of the tee pipe during water replenishment according to the present invention. Figure 9 This is a frontal cross-sectional view of the tee pipe used for drainage according to the present invention.

[0020] In the diagram: 1. Seat plate; 2. Limiting post; 21. Limiting groove; 3. Lifting slider; 4. Balance plate; 41. Bubble level; 42. Damper; 43. Return spring; 44. Scale rod; 45. Buoyancy block; 46. Adjusting screw; 5. Controller; 51. Pressure sensor; 52. Telescopic rod; 53. Timer; 54. Solar panel; 55. Battery; 56. Water pump; 6. Inlet pipe; 7. Outlet pipe; 8. T-pipe; 81. Shaft; 82. Valve block; 83. Rubber sealing sheet; 84. Pulley; 85. First pull rope; 86. Second pull rope; 87. Protective buckle plate. Detailed Implementation

[0021] 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.

[0022] Please see Figure 1-9 The present invention provides a technical solution: an automatic farmland water level control device, including a base plate 1, a limiting column 2 fixedly installed on the upper surface of the base plate 1, and a lifting slider 3 slidably arranged inside the limiting column 2. A balance adjustment mechanism is connected to one side of the lifting slider 3, and a telescopic rod 52 is fixedly connected to the other side of the lifting slider 3. A water pump 56 is fixedly installed in the groove of the base plate 1, and a solar panel 54 arranged in the shape of an eaves is fixedly connected to the upper surface of the base plate 1 through a connecting plate and the limiting column 2. The two ends of the water pump 56 are respectively provided with an inlet pipe 6 buried inside the field ridge and an outlet pipe 7 located outside the field ridge. A three-way pipe 8 is connected through the lower end of the inlet pipe 6, and a double valve adaptive opening and closing assembly is installed between the three-way pipe 8 and the lifting slider 3. A filter is installed at the opening of the water outlet pipe 7 located on the outside of the field ridge.

[0023] The lifting slider 3 is cross-shaped, and the limiting post 2 has a cross-shaped limiting groove 21 inside that matches the lifting slider 3. By utilizing the cooperation between the cross-shaped limiting groove 21 and the cross-shaped lifting slider 3, the lifting slider 3 can move up and down stably, and with more matching surfaces, it has high stability.

[0024] The balance adjustment mechanism includes a balance plate 4, a bubble level 41, a damper 42, a return spring 43, a scale rod 44, a buoyancy block 45, and an adjusting screw 46. The balance plate 4 is fixed to one side of the lifting slider 3. The bubble level 41 is installed inside the balance plate 4. The base of the damper 42 is fixed to the upper surface of the balance plate 4, and the telescopic end of the damper 42 is fixed to the lower surface of the solar panel 54. The return spring 43 is wound around the outer wall of the damper 42. One end of the return spring 43 is welded to the lower surface of the solar panel 54, and the other end is fixed to the upper surface of the balance plate 4. A scale rod 44 is slidably mounted through the outer end of the balance plate 4. A buoyancy block 45 is fixed at the lower end, and an adjusting screw 46 is installed through the inside of the balance plate 4. The lower end of the adjusting screw 46 is mounted on a fixing plate on the outer wall of the scale rod 44 through a bearing. The balance plate 4 has a screw hole inside that matches the thread on the outer wall of the adjusting screw 46. This balance adjustment mechanism mainly uses the balance between the return force of the return spring 43, the buoyancy of the buoyancy block 45, and the weight of the structure to achieve stability. Once the buoyancy changes (more precisely, the draft of the buoyancy block 45 changes), the entire balance will be broken, and the lifting slider 3 will rise or fall synchronously until the forces are balanced again. Then the lifting slider 3 and the buoyancy block 45 will reset and achieve stability.

[0025] The lower end of the buoyancy block 45 is suspended in the paddy field liquid surface, and the buoyancy of the water on the buoyancy block 45 is in a balanced state with the resistance of the return spring 43. The bubble level 41 is set to observe the horizontal state of the entire device and the horizon. When the liquid level rises, the draft of the buoyancy block 45 increases. However, the buoyancy block 45 is limited by the balance. Therefore, the buoyancy block 45 will gradually move upward as the draft gradually increases, achieving a dynamic balance effect. The lifting slider 3 will rise synchronously and drive the lower drainage valve to open, realizing automatic drainage. After the water level gradually falls to the set position, the buoyancy block 45 will gradually fall back to the reset position and gradually achieve static balance.

[0026] A controller 5 is fixedly installed on the upper surface of the seat plate 1, and a pressure sensor 51 is installed on the upper surface of the controller 5. A gap is reserved between the telescopic end of the telescopic rod 52 and the pressure sensor 51. A timer 53 and a battery 55 are fixedly installed on the side of the connecting plate, and the solar panel 54 is electrically connected to the battery 55. The controller 5 is electrically connected to the pressure sensor 51, the timer 53, the battery 55, and the water pump 56.

[0027] The dual-valve adaptive opening and closing assembly includes a rotating shaft 81, a valve block 82, a lever block 84, a first pull rope 85, a second pull rope 86, and a protective buckle plate 87. The central intersection of the three-way pipe 8 is set as a hollow disc shape. The rotating shaft 81 is installed through the central intersection of the three-way pipe 8 via a sealed bearing. The two ends of the rotating shaft 81 are respectively installed through the outer sides of the two ends of the three-way pipe 8. The two ends of the rotating shaft 81 located on the outer side of the three-way pipe 8 are centrally symmetrically connected to lever blocks 84. The ends of the two lever blocks 84 are respectively fixed with one end of the first pull rope 85 and the second pull rope 86. The other ends of the first pull rope 85 and the second pull rope 86 are guided by the guide wheel group and then vertically fixed to the upper and lower surfaces of the lifting slider 3. The valve block 82, which is used to adaptively close the three-way pipe 8, is fixed to the outer wall inside the rotating shaft 81.

[0028] The three-way pipe 8 consists of four parts: a vertical pipe, two horizontal pipes, and a converging disc. One horizontal pipe opening is located inside the farmland, and the other horizontal pipe opening is located outside the farmland. Filters are installed at both horizontal pipe openings. The outer part of the valve block 82 is an arc shape that matches the inner wall of the central disc groove of the three-way pipe 8. The outer part of the valve block 82 also seals the inlet of the vertical pipe of the three-way pipe 8 and the inner opening of the horizontal pipe near the outer side of the field ridge. Rubber sealing sheets 83 are evenly arranged between the outer wall of the valve block 82 and the inner wall of the central disc groove of the three-way pipe 8, which are attached to the inner wall of the disc groove.

[0029] Working principle: When using this automatic farmland water level control device, such as Figure 1 , Figure 2 and Figure 3 The diagram shows the initial state of the automatic water replenishment and drainage system after the standard water level is set. The lifting slider 3, the first pull rope 85, the toggle block 84 on one side, the rotating shaft 81, the toggle block 84 on the other side, and the second pull rope 86 form a cyclical balance structure. The balance structure is mainly supported by the balance of forces between the buoyancy of the buoyancy block 45, the restoring force of the return spring 43, and the gravity of the corresponding parts. Example

[0030] As the water level in the paddy field gradually rises, the draft of the buoyancy block 45 in equilibrium will gradually increase, resulting in a gradual increase in the buoyancy of the buoyancy block 45. To maintain balance, the buoyancy block 45 will rise gradually with the water level, achieving a dynamic equilibrium effect of adaptively rising and falling with changes in water level. As the buoyancy block 45 gradually rises, it will synchronously drive the lifting slider 3 to rise along the inner wall of the limiting post 2 via the scale rod 44 and the balance plate 4. Figure 3 and Figure 6As shown, when the lifting slider 3 rises, it will simultaneously pull the second pull rope 86 upward. Therefore, the second pull rope 86 will simultaneously pull the lever 84 on the other side. The lever 84, which is symmetrically arranged on the back side, is subjected to a horizontal rightward pulling force, causing the lever 84 to drive the rotating shaft 81 to rotate clockwise in an adaptive manner.

[0031] like Figure 7 The above describes the initial state of the rotating shaft 81 and the valve block 82. When the rotating shaft 81 rotates clockwise, it will drive the valve block 82 to rotate clockwise synchronously, thereby enabling the valve block 82 to achieve the desired state. Figure 9 In the state shown, valve block 82 closes the vertical channel of the three-way pipe 8 while opening the horizontal channel. Since one end of the horizontal channel of the three-way pipe 8 is located at the bottom of the paddy field water level, the water in the paddy field will gradually be discharged outward through the horizontal channel of the three-way pipe 8. As the water level in the paddy field gradually drops, buoyancy block 45 will drive the lifting slider 3 to gradually fall and reset, thereby causing valve block 82 to gradually return to its original position. Figure 7 The system is shown in the diagram and the T-pipe 8 is closed to achieve automatic drainage. The automatic drainage is real-time. Simply put, as long as the water level in the paddy field is higher than the set standard value, the system will automatically perform adaptive drainage until the water level returns to the set height. Example

[0032] As the water level in the paddy field gradually drops, the buoyancy block 45 will similarly cause the lifting slider 3 to adaptively descend, such as... Figure 1 , Figure 3 and Figure 6 As shown, the first pull rope 85 exerts a leftward pulling force on the lever 84 on one side, causing the lever 84 to rotate counterclockwise accordingly. This, in turn, drives the rotating shaft 81 and the valve block 82 to rotate counterclockwise accordingly, causing the valve block 82 to... Figure 7 The initial angle shown is gradually rotated counterclockwise to Figure 8 At the angle shown, and with valve block 82 rotated slightly, the horizontal and vertical water outlet channels of the three-way pipe 8 will open until it rotates to the indicated angle. Figure 8 As shown in the figure, this process of opening the water inlet relies on the balance structure and does not involve the electronic control system (where the controller 5 is model KY02S, the pressure sensor 51 is model PT124G-111, and the timer 53 is model T32).

[0033] When the lifting slider 3 adaptively falls, the lower end of the telescopic rod 52 will fall synchronously, and after falling a short distance, it will contact the pressure sensor 51. After being pressed, the pressure sensor 51 will transmit an electrical signal to the controller 5. The controller 5 will start the water pump 56 (the solar panel 54 stores electricity in the battery 55, and the battery 55 supplies power to the pressure sensor 51, the timer 53 and the water pump 56). The water pump 56 pumps water from the outside to the inlet pipe 6 through the outlet pipe 7, and then the water is injected into the paddy field through the adaptively opened channel mentioned above, realizing automatic water replenishment.

[0034] However, following the above steps, there is a problem of high energy consumption during water replenishment. The water level in the paddy field is affected by multiple factors (evaporation, infiltration, etc.) and there is a drop. If the water replenishment system is turned on and off in real time according to the liquid level, the electrical control system will likely be turned on and off frequently, resulting in a large loss of energy and damage to the electrical control components. Although the actual paddy field water level is set with a standard value, as long as the drop is not large, it will not have a significant impact on the actual growth of rice. Therefore, in order to avoid the problem of frequent start and stop of the automatic water replenishment system, this invention also sets a timer 53, which can realize the timed triggering of the electrical control system as needed. Simply put, the controller 5 is turned on at a time. When the controller 5 is turned on, if the pressure sensor 51 "feels" the pressure effect, it proves that the liquid level is lower than the set water level. Therefore, the water pump 56 starts and pumps the external water into the paddy field through the channel to realize the above cycle. When the controller 5 is not turned on, even if the pressure sensor 51 is touched, no signal is sent, so the water pump 56 will not start.

[0035] In summary In the above embodiments one and two, the buoyancy block 45 is at the same standard height. However, the present invention can rotate and adjust the screw 46 according to the needs of rice growth, thereby achieving the function of adjusting the initial height of the buoyancy block 45 (although rice growth has certain requirements for water level, the cycle is relatively long. Simply put, the standard water level may only need to be changed once every few months. Therefore, the manual adjustment method adopted in the present invention is more in line with reality).

[0036] From a mechanical perspective, the forces acting on the buoyancy of the buoyancy block 45, the restoring force of the return spring 43, and the weight of the corresponding parts will always remain in equilibrium. When the liquid level remains constant or changes only slightly, the three forces are in static equilibrium. However, when the liquid level changes, the three forces are in dynamic equilibrium. This dynamic equilibrium will eventually be restored to static equilibrium through replenishment and drainage during the balancing motion. Therefore, when the initial height of the buoyancy block 45 is manually adjusted, the overall equilibrium still exists, but only the buoyancy changes compared to before adjustment. Thus, after adjusting the buoyancy block 45, replenishment and drainage will automatically occur, and the automatic replenishment and drainage of the water level will ensure that the buoyancy block 45 receives sufficient buoyancy, thereby achieving re-equilibrium.

[0037] The overall effect is that as long as the water level in the paddy field is high or low, the system will automatically perform adaptive replenishment and drainage until the water level returns to the set height. The automatic drainage system is always in operation, while the automatic water replenishment system is timed for detection and replenishment. The water level in the paddy field is affected by multiple factors and there are fluctuations. If the water replenishment system is opened and closed in real time according to the water level, the electrical control system will likely be frequently opened and closed, resulting in energy waste. Therefore, this invention allows for deviations in the water level in the paddy field and adopts a timed detection method. The structural movement is adaptive, but the water pump 56 is controlled by the electrical control system to open and close timed, thereby achieving the effect of ensuring the normal operation of the water replenishment system while saving energy.

[0038] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic farmland water level control device, comprising a base plate (1), characterized in that: The upper surface of the seat plate (1) is fixedly installed with a limiting post (2), and a lifting slider (3) is slidably arranged inside the limiting post (2). One side of the lifting slider (3) is connected to a balance adjustment mechanism, and the other side of the lifting slider (3) is fixedly connected to a telescopic rod (52). A water pump (56) is fixedly installed in the groove of the seat plate (1), and a solar panel (54) arranged in the shape of an eaves is fixedly connected to the upper surface of the seat plate (1) through a connecting plate and the limiting post (2). The two ends of the water pump (56) are respectively provided with an inlet pipe (6) buried inside the field ridge and an outlet pipe (7) located outside the field ridge. The lower end of the inlet pipe (6) is connected to a three-way pipe (8), and a double valve adaptive opening and closing assembly is installed between the three-way pipe (8) and the lifting slider (3). The outlet pipe (7) is equipped with a filter at the opening on the outside of the field ridge.

2. The automatic farmland water level control device according to claim 1, characterized in that: The lifting slider (3) is cross-shaped, and the limiting column (2) has a limiting groove (21) that matches the lifting slider (3) and is cross-shaped.

3. The automatic farmland water level control device according to claim 1, characterized in that: The balance adjustment mechanism includes a balance plate (4), a bubble level (41), a damper (42), a return spring (43), a scale rod (44), a buoyancy block (45), and an adjusting screw (46). The balance plate (4) is fixed to one side of the lifting slider (3). The bubble level (41) is installed inside the balance plate (4). The base of the damper (42) is fixed to the upper surface of the balance plate (4), and the telescopic end of the damper (42) is fixed to the lower surface of the solar panel (54). A return spring (43) is wound around the outer wall of the damper (42). One end of the reset spring (43) is welded to the lower surface of the solar panel (54), and the other end of the reset spring (43) is fixed to the upper surface of the balance plate (4). A scale rod (44) is slidably provided through the outer end of the balance plate (4), and a buoyancy block (45) is fixed at the lower end of the scale rod (44). An adjusting screw (46) is provided through the inside of the balance plate (4), and the lower end of the adjusting screw (46) is mounted on a fixing plate on the outer wall of the scale rod (44) through a bearing. A screw hole matching the thread on the outer wall of the adjusting screw (46) is opened inside the balance plate (4).

4. The automatic farmland water level control device according to claim 3, characterized in that: The lower end of the buoyancy block (45) is suspended in the paddy field liquid surface, and the buoyancy of the water on the buoyancy block (45) is in balance with the resistance of the return spring (43). The bubble level (41) is set to observe the horizontal state between the entire device and the horizon.

5. The automatic farmland water level control device according to claim 1, characterized in that: A controller (5) is fixedly installed on the upper surface of the seat plate (1), and a pressure sensor (51) is installed on the upper surface of the controller (5). A gap is reserved between the telescopic end of the telescopic rod (52) and the pressure sensor (51). A timer (53) and a battery (55) are fixedly installed on the side of the connecting plate, and the solar panel (54) and the battery (55) are electrically connected. The controller (5) is electrically connected to the pressure sensor (51), the timer (53), the battery (55), and the water pump (56).

6. The automatic farmland water level control device according to claim 1, characterized in that: The dual-valve adaptive opening and closing assembly includes a rotating shaft (81), a valve block (82), a lever block (84), a first pull rope (85), a second pull rope (86), and a protective buckle plate (87). The center intersection of the three-way pipe (8) is set as a hollow disc shape. The rotating shaft (81) is installed through the center intersection of the three-way pipe (8) by a sealed bearing. The two ends of the rotating shaft (81) are respectively installed through the outer sides of the two ends of the three-way pipe (8). The two ends of the rotating shaft (81) located on the outer side of the three-way pipe (8) are connected to the lever block (84) in a centrally symmetrical manner. The ends of the two lever blocks (84) are respectively fixed with one end of the first pull rope (85) and the second pull rope (86). The other ends of the first pull rope (85) and the second pull rope (86) are guided by the guide wheel group and then vertically fixed to the upper and lower surfaces of the lifting slider (3). The outer wall of the rotating shaft (81) located inside the three-way pipe (8) is fixed with a valve block (82) for adaptively closing the three-way pipe (8).

7. The automatic farmland water level control device according to claim 6, characterized in that: The three-way pipe (8) consists of four parts: a vertical pipe, two horizontal pipes, and a converging disc. One horizontal pipe opening is located inside the farmland, and the other horizontal pipe opening is located outside the farmland. Filters are installed at the two horizontal pipe openings. The valve block (82) is arc-shaped and fits the inner wall of the central disc groove of the three-way pipe (8). The valve block (82) is also sealed at the inlet of the vertical pipe of the three-way pipe (8) and the inner opening of the horizontal pipe near the outer side of the field ridge. Rubber sealing sheets (83) are evenly arranged between the outer wall of the valve block (82) and the inner wall of the central disc groove of the three-way pipe (8).

Images