Automatic control device for water layer of rice field

Abstract

The invention discloses a rice field water layer automatic control device, and belongs to the technical field of agricultural rice field control. The chain is in transmission connection with the floating ball through a fixing piece, a chain wheel is assembled in the chain, and the chain and the chain wheel are arranged in the water layer of the rice field. According to the device, the floating ball can rise through the water level and drive the fixing piece to pull the chain to rotate, at the moment, the chain on the other side can pull the filter cover and the telescopic pipe to move downwards, the telescopic pipe moving downwards enters the bottom of the water layer, and rising water can enter the telescopic pipe through the filter cover and is discharged out of the field through the drainage pipe; according to water layers needed in different growth periods of rice, it can be guaranteed that the water layers are kept at proper heights in different growth periods, the problem of yield reduction caused by the fact that the water layers are too high or too low is solved, the dual regulation and control functions of automatic water drainage and water storage are achieved, and the water drainage control precision is improved.

Description

Technical Field

[0001] This invention belongs to the field of agricultural paddy field control technology, and in particular relates to an automatic control device for paddy field water level. Background Technology

[0002] In rice cultivation, the water level in paddy fields directly affects the growth quality of rice during key growth stages such as emergence, tillering, jointing, and heading. A suitable water level not only provides a stable moisture environment and suppresses weed growth, but also regulates the field microclimate, improves fertilizer efficiency, and enhances stress resistance. Fluctuations in water levels due to rainfall, evaporation, and irrigation conditions can lead to significant variations in water depth; water that is too deep or too shallow can result in reduced rice yield or lower quality.

[0003] Currently, the commonly used methods for water level control in paddy fields mainly rely on manual operation or traditional gate devices. Manual water release or blocking is labor-intensive. Although traditional iron gates can achieve drainage to a certain extent, they are prone to rust or deformation after long-term immersion, have poor sealing performance, and often cause "water leakage" problems, resulting in fertilizer and water loss and agricultural non-point source pollution. At the same time, although some high-end electronic valve devices have a high degree of automation, they are expensive, complex to maintain, and require external power supply, making it difficult to promote their use in large-scale paddy fields. Summary of the Invention

[0004] The purpose of this invention is to address the problems that existing paddy field water level control methods often lead to fertilizer and water loss and agricultural non-point source pollution, and that high-precision electronic valves are difficult to widely use in large-scale paddy fields. Therefore, this invention proposes an automatic paddy field water level control device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An automatic water level control device for paddy fields, comprising: Floating balls that float on the surface of the water layer in the paddy field; The chain is connected to the float via a fixing component, and the inner chain of the chain is equipped with a sprocket. The chain and sprocket are located in the water layer of the paddy field. The telescopic pipe has a filter cover at the top inlet. Another part of the telescopic pipe is connected to a drainage pipe extending outside the paddy field. The telescopic pipe is connected to the side of the chain away from the float by a fixing member on the other side. The top opening of the telescopic pipe is at the same level as the float. The drainage height of the telescopic pipe inlet is controlled by the floating of the float on the surface of the paddy field water layer.

[0006] As a further description of the above technical solution: Also includes: The sleeve is attached to the outside of the float. The rotating part is connected to one side of the sleeve via a support rod, and the other end of the rotating part is rotatably connected to the fixed part, which is connected to the outside of the chain. A shaft is connected to both sides of the rotating component and extends to the outside of the fixed component. The rotating component forms a rotating pair with the fixed component through the shaft. The oscillation control mechanism is connected to the outside of the fixed part and is connected to the shaft drive. The oscillation control mechanism controls the deflection stroke of the shaft and the rotating part.

[0007] As a further description of the above technical solution: It also includes: a cam, connected to one side of the shaft; A control ring is connected to one side of a fixed component. The control ring has an arc-shaped inner cavity, and the cam is rotatably connected to the arc-shaped inner cavity. The limiting sleeve is adjustable and connected to the control slots on both sides of the arc-shaped inner cavity of the control ring. The cam rotates and contacts the limiting sleeves on both sides to limit the deflection stroke.

[0008] As a further description of the above technical solution: It also includes: a support base, connected to one side of the control ring; A movable rod is movably connected to the cavity of the support seat. An adjusting screw is rotatably connected to one side of the movable rod. The adjusting screw is externally threaded to a first screw seat. The first screw seat is embedded in one side of the support seat. The movement of the movable rod in the cavity of the support seat is controlled by adjusting the screw on one side of the first screw seat. Two pressure rods are connected to both ends of one side of the moving rod; The limiting toothed plate is slidably connected to the control groove on one side of the control ring. A connecting rod is rotatably connected to the rear side of the limiting toothed plate, and the other end of the connecting rod is hinged to the pressure rod. The directional gear is rotatably connected to the control groove, and the outer side of the directional gear is integrally connected to the limiting sleeve. The rotation of the control ring is restricted by the meshing of the directional gear and the limiting tooth plate.

[0009] As a further description of the above technical solution: The float is surrounded by multiple hanging rings, which are slidably connected to the stepped groove inside the sleeve.

[0010] As a further description of the above technical solution: It also includes: a flow-dissipating mechanism, located at the top of the telescopic pipe, which removes impurities by rotating at the drain outlet at the top of the telescopic pipe.

[0011] As a further description of the above technical solution: The spoiler mechanism includes: A turbulence ring is rotatably connected to the outside of the drain outlet at the top of the telescopic pipe, and the top of the turbulence ring is rotatably connected to the filter cover. The spoiler is arranged in a ring around the circumference of the spoiler ring.

[0012] As a further description of the above technical solution: The cross-sectional shape of the baffle is wavy.

[0013] As a further description of the above technical solution: It also includes: a helical brake rod, which is coaxially disposed inside the telescopic tube, and the bottom end of the helical brake rod is connected to the bottom side of the telescopic tube through a fixing ring; A rotating component is rotatably connected to the outside of a helical brake rod. A helical guide groove is provided on the outside of the helical brake rod, and a protrusion that contacts the helical guide groove is provided on the inside of the rotating component. The outer periphery of the rotating component is connected to the inner side of the turbulence ring through multiple connecting rods. When the telescopic tube extends or retracts, causing the rotating frame to move up and down outside the helical brake rod, the helical guide groove drives the rotating component and the turbulence ring to rotate and turbulent the airflow.

[0014] As a further description of the above technical solution: It also includes: a base, installed on the bottom side of the paddy field; A fixed plate, wherein the chain and sprocket are assembled to one side of the fixed plate; Assembly slots are provided, with multiple assembly slots extending through one end of the base and the fixed plate. The assembly depth of the base and the fixed plate can be adjusted at the position of the assembly slots on both sides by assembly bolts.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In this invention, the float can rise with the water level and drive the fixing component to pull the chain to rotate. At this time, the chain on the other side can pull the filter cover and the telescopic pipe to move downward. The telescopic pipe moves downward and enters the bottom of the water layer. The rising water can enter the telescopic pipe through the filter cover and be discharged out of the field through the drainage pipe. It can ensure that the water layer is kept at an appropriate height at different growth stages according to the water layer required by rice at different growth stages, avoid the problem of yield reduction caused by excessively high or low water layers, realize the dual regulation function of automatic drainage and water storage, and improve the accuracy of drainage control.

[0016] 2. In this invention, when the float is disturbed by water fluctuations, the cam can squeeze the corresponding limiting sleeve when it rotates to the limit stroke. The limiting sleeve can use its own elasticity to limit the deflection angle of the cam and the rotating part, which is beneficial to the stability of the float, reduces the influence of water layer micro-fluctuations on the float position, and improves the stability of the buoyancy transmission from the float to the chain. By adjusting the angle of the limiting sleeve in the arc-shaped inner cavity of the control ring, the limiting sleeves rotating outward on both sides can increase the fluctuation stroke, and the limiting sleeves rotating inward can shorten the fluctuation stroke. This is beneficial to adjust the limiting stroke according to water fluctuations and avoids accidental drainage caused by short-term fluctuations.

[0017] 3. In this invention, when the float causes the telescopic tube to extend or retract, it can rotate by sliding the rotating component outside the helical brake rod. At this time, the rotating component can drive the external turbulence ring to rotate through the connecting rod. The rotation of the turbulence ring can drive the turbulence plate to rotate. The outward rotation of the turbulence plate can disperse the farmland impurities accumulated around the filter cover, avoid filter screen clogging, and ensure long-term drainage efficiency. 4. In this invention, the base and the fixing plate are connected by an assembly groove and bolts. The height of the float and the inlet of the telescopic pipe can be adjusted according to installation needs, adapting to different seasons or paddy field requirements, and improving the applicability of the device under different field conditions and water level control requirements. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an automatic water level control device for paddy fields proposed in this invention. Figure 2 The present invention proposes Figure 1 Enlarged structural diagram of section A; Figure 3 This is a schematic diagram showing the disassembled structure of an automatic water level control device for paddy fields proposed in this invention; Figure 4 This is a top-view structural diagram of an automatic water level control device for paddy fields proposed in this invention. Figure 5 The present invention proposes Figure 4 Enlarged structural diagram of section B; Figure 6 This is a schematic diagram of the float structure of an automatic water level control device for paddy fields proposed in this invention; Figure 7 This is a schematic diagram of the fluctuation control mechanism of an automatic water level control device for paddy fields proposed in this invention. Figure 8 This is a schematic diagram of the disassembled structure of the fluctuation control mechanism of an automatic water level control device for paddy fields proposed in this invention; Figure 9 This is a schematic diagram of the limiting sleeve structure of an automatic water level control device for paddy fields proposed in this invention; Figure 10 This is a schematic diagram of the lateral structure of the fluctuation control mechanism of an automatic water level control device for paddy fields proposed in this invention.

[0019] Legend: 1. Chain; 2. Sprocket; 3. Float; 4. Hoop; 5. Fixing component; 6. Fluctuation control mechanism; 601. Control ring; 602. Limiting toothed plate; 603. Connecting rod; 604. Pressure rod; 605. Moving rod; 606. Adjusting screw; 607. Support base; 608. Limiting sleeve; 609. Directional gear; 610. Cam; 7. Rotating component; 8. Support rod; 9. Fluctuation mechanism; 901. Fluctuation ring; 902. Fluctuation vane; 903. Connecting rod; 904. Rotating component; 905. Helical brake rod; 10. Filter cover; 11. Telescopic pipe; 12. Drain pipe; 13. Base; 14. Fixing plate; 15. Hanging ring; 16. Assembly slot. Detailed Implementation

[0020] 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.

[0021] Please see Figures 1-10 The present invention provides a technical solution: an automatic water level control device for paddy fields, comprising: Buoy 3 floats on the surface of the water layer in the paddy field; Chain 1 is connected to float 3 via fastener 5. Chain 1 is equipped with sprocket 2. Chain 1 and sprocket 2 are located in the water layer of paddy field. The telescopic pipe 11 has a filter cover 10 at its top inlet. Another part of the telescopic pipe 11 is connected to a drainage pipe 12 extending outside the paddy field. The telescopic pipe 11 is connected to the side of the chain 1 away from the float 3 by a fixing member 5 on the other side. The top opening of the telescopic pipe 11 is at the same horizontal position as the float 3. The drainage height of the inlet of the telescopic pipe 11 is controlled by the floating of the float 3 on the surface of the paddy field water layer.

[0022] Specifically: When the paddy field is flooded at the set water level, the float 3 can rise with the water level and drive the fixing part 5 to pull the chain 1 to rotate. At this time, the chain 1 on the other side can pull the filter cover 10 and the telescopic pipe 11 to move downward. The telescopic pipe 11 moves downward and enters the bottom of the water layer. The rising water can enter the telescopic pipe 11 through the filter cover 10 and be discharged out of the field through the drain pipe 12. Thus, the water storage height can be controlled according to the water layer required at different growth stages of rice by setting the distance between the inlet of the float 3 and the water surface of the telescopic pipe 11. When rainfall or other factors cause the water level in the paddy field to rise, the float 3 rises with the water level. As the float 3 rises, it pulls the telescopic pipe 11 on the opposite side down through the chain 1, and the drainage outlet is lower than the water surface, and the paddy field begins to drain. When drought occurs, after the water level drops, the float 3 falls with the water layer and no longer pulls or tensions the telescopic pipe 11. The telescopic pipe 11 uses its own elasticity to maintain the corresponding set water level height, and the paddy field stores water. The height of the telescopic pipe 11 should be within a reasonable telescopic stroke selected during installation to maintain the corresponding position of the float 3 and avoid the collapse of the telescopic pipe 11, which would cause the waterline to drop further and affect the water storage effect. Water enters through the side of the filter cover 10, which effectively avoids the impact of debris accumulation in the paddy field on the top of the drainage pipe 12 on drainage and water level control accuracy. The telescopic pipe 11 solves the problem of the drainage outlet rising and falling. To avoid the problem of traditional iron gates rusting or deforming due to long-term immersion in water, as seen in similar technologies, this embodiment uses plastic gears and plastic chains 1 with ceramic bearings for chain 1 and sprocket 2, which improves corrosion resistance while maintaining durability.

[0023] Please see Figures 1-3 It also includes: a sleeve 4, which is connected to the outside of the float 3; The rotating part 7 is connected to one side of the sleeve 4 via the support rod 8, and the other end of the rotating part 7 is rotatably connected to the fixed part 5. The fixed part 5 is connected to the outside of the chain 1. A shaft is connected to both sides of the rotating member 7 and extends to the outside of the fixed member 5. The rotating member 7 forms a rotating pair with the fixed member 5 through the shaft. The wave control mechanism 6 is connected to the outside of the fixed part 5 and is connected to the shaft transmission. The wave control mechanism 6 controls the deflection stroke of the shaft and the rotating part 7. It also includes: cam 610, which is connected to one side of the shaft; Control ring 601 is connected to one side of the fixing member 5. Control ring 601 has an arc-shaped inner cavity. The cam 610 is rotatably connected to the arc-shaped inner cavity. The limiting sleeve 608 is adjustablely connected to the control slots opened on both sides of the arc-shaped inner cavity of the control ring 601. The cam 610 rotates and contacts the limiting sleeves 608 on both sides to limit the deflection stroke.

[0024] It also includes: a support base 607, which is connected to one side of the control ring 601; The movable rod 605 is movably connected to the cavity of the support base 607. An adjusting screw 606 is rotatably connected to one side of the movable rod 605. The adjusting screw 606 is externally threaded to a first screw seat. The first screw seat is embedded in one side of the support base 607. The movement of the movable rod 605 in the cavity of the support base 607 is controlled by adjusting the screw 606 on one side of the first screw seat. Pressure rod 604, two pressure rods 604 are connected to both ends of one side of the moving rod 605; The limiting toothed plate 602 is slidably connected to the control groove on one side of the control ring 601. A connecting rod 603 is rotatably connected to the rear side of the limiting toothed plate 602. The other end of the connecting rod 603 is hinged to the pressure rod 604. The directional gear 609 is rotatably connected in the control groove. The outer side of the directional gear 609 is integrally connected to the limiting sleeve 608. The rotation of the control ring 601 is restricted by the meshing of the directional gear 609 and the limiting tooth plate 602.

[0025] Specifically: When the float 3 is disturbed by water fluctuations, the float 3 can pull the outer sleeve 4 to drive the support rod 8 to pull the rotating part 7 to rotate within the fixed part 5 through the shaft. When the shaft rotates, it can rotate within the control ring 601 through the cam 610. When the cam 610 rotates to the limit stroke, it can squeeze the corresponding position limit sleeve 608. The limit sleeve 608 can use its own elasticity to limit the deflection angle of the cam 610 and the rotating part 7, which is beneficial to the stability of the float 3, reduces the influence of water layer micro-fluctuations on the position of the float 3, and improves the stability of the buoyancy of the float 3 transmitted to the chain 1.

[0026] Furthermore, when it is necessary to adjust the fluctuation limit stroke, the adjusting screw 606 can be rotated within the first screw seat. The movement of the adjusting screw 606 can pull the moving rod 605 to move. The moving rod 605 can drive the pressure rod 604 to pull the connecting rod 603 to move. The connecting rod 603 pulls the limiting tooth plate 602 to move around the hinge position. The movement of the limiting tooth plate 602 can separate it from the inner adjusting gear 609. At this time, the limiting sleeve 608 can be rotated through the limiting adjusting gear 609 to adjust the angle of the limiting sleeve 608 in the arc-shaped inner cavity of the control ring 601. The limiting sleeves 608 rotating outward on both sides can increase the fluctuation stroke, and the limiting sleeves 608 rotating inward can shorten the fluctuation stroke, which is beneficial for adjusting the limit stroke according to the water fluctuation. Please see Figures 4-5 It also includes: a flow disturbance mechanism 9, which is located at the top of the telescopic pipe 11, and removes impurities by rotating the flow disturbance mechanism 9 at the drain outlet at the top of the telescopic pipe 11. The turbulence mechanism 9 includes: a turbulence ring 901, which is rotatably connected to the outside of the drain outlet at the top of the telescopic pipe 11, and the top of the turbulence ring 901 is rotatably connected to the filter cover 10; Spoiler 902, multiple spoilers 902 are arranged around the circumference of the spoiler ring 901. A spiral brake rod 905 is coaxially disposed inside the telescopic tube 11, and the bottom end of the spiral brake rod 905 is connected to the bottom side of the telescopic tube 11 by a fixing ring. The rotating component 904 is rotatably connected to the outside of the spiral brake rod 905. The spiral brake rod 905 has a spiral guide groove on its outside, and the rotating component 904 has a protrusion on its inside that contacts the spiral guide groove. The outer periphery of the rotating component 904 is connected to the inside of the turbulence ring 901 through multiple connecting rods 903. When the telescopic tube 11 extends or retracts, causing the rotating frame to move up and down outside the spiral brake rod 905, the spiral guide groove drives the rotating component 904 and the turbulence ring 901 to rotate and turbulent the air. Among them, the cross-sectional shape of the spoiler 902 is wavy.

[0027] Specifically: When the float 3 drives the telescopic tube 11 to extend or retract, it can rotate by sliding the rotating part 904 outside the spiral brake rod 905. At this time, the rotating part 904 can drive the external turbulence ring 901 to rotate through the connecting rod 903. The rotation of the turbulence ring 901 can drive the turbulence plate 902 to rotate. The outward rotation of the turbulence plate 902 can disperse the farmland impurities accumulated around the filter cover 10, thereby avoiding the impact of impurities clogging the filter holes of the filter cover 10 on the drainage efficiency.

[0028] Please see Figure 6 In another embodiment, the float 3 is surrounded by a plurality of hanging rings 15, which are slidably connected to the stepped groove inside the sleeve 4. Specifically: the sliding of the external hanging ring 15 of the float 3 within the sleeve 4 helps to reduce the small fluctuations of the float 3 and improve the resistance to water fluctuations; Please see Figure 3 It also includes: base 13, installed on the bottom side of the paddy field; Fixed plate 14, the chain 1 and sprocket 2 are assembled on one side of fixed plate 14; Assembly slots 16, multiple assembly slots 16 are respectively opened through one end of the base 13 and the fixing plate 14, and the assembly depth of the base 13 and the fixing plate 14 is adjusted at the position of the assembly slots 16 on both sides by assembly bolts. The base 13 can be anchored to the bottom of the paddy field by anchor bolts, and the base 13 can increase the contact area and improve the stability of the device. Specifically, the fixed plate 14 can adjust the position of the float 3 and the top water inlet of the telescopic pipe 11 according to the assembly position of the assembly groove 16 between the bottom assembly groove 16 and the base 13, which is convenient for adjusting the drainage depth in different seasons and is beneficial for controlling the water depth of the paddy field.

[0029] Working principle: When the paddy field rises at the set water level, the float 3 can raise the water level and drive the fixing part 5 to pull the chain 1 to rotate. At this time, the chain 1 on the other side can pull the filter cover 10 and the telescopic pipe 11 to move downward. The telescopic pipe 11 moves downward and enters the bottom of the water layer. The rising water can enter the telescopic pipe 11 through the filter cover 10 and be discharged out of the field through the drain pipe 12. The water level can be adjusted according to the different growth stages of the rice. When the float 3 is disturbed by water fluctuations, the float 3 can pull the outer sleeve 4 to drive the support rod 8 to pull the shaft of the rotating part 7 to rotate within the fixed part 5. When the shaft rotates, the cam 610 can rotate within the control ring 601. When the cam 610 rotates to the limit stroke, it can squeeze the corresponding position limit sleeve 608. The limit sleeve 608 can use its own elasticity to limit the deflection angle of the cam 610 and the rotating part 7. Rotating the adjusting screw 606 within the first screw seat, the movement of the adjusting screw 606 can pull the moving rod 605 to move, the moving rod 605 can drive the pressure rod 604 to pull the connecting rod 603 to move, the connecting rod 603 pulls the limiting tooth plate 602 to move around the hinge position, the movement of the limiting tooth plate 602 can separate it from the inner adjusting gear 609, at this time the limiting sleeve 608 can be rotated to limit the rotation of the adjusting gear 609, adjusting the angle of the limiting sleeve 608 in the arc-shaped inner cavity of the control ring 601; When the float 3 drives the telescopic tube 11 to extend or retract, the rotating part 904 rotates due to the sliding outside the spiral brake rod 905. The rotating part 904 can drive the connecting rod 903 to drive the external turbulence ring 901 to rotate. The rotation of the turbulence ring 901 can drive the turbulence plate 902 to rotate. The outward rotation of the turbulence plate 902 can disperse the farmland impurities accumulated around the filter cover 10.

[0030] In this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0031] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An automatic water level control device for paddy fields, characterized in that, include: Float (3) floats on the surface of the paddy field water layer; The chain (1) is connected to the float (3) via a fastener (5). The chain (1) is equipped with a sprocket (2). The chain (1) and the sprocket (2) are located in the paddy field water layer. The telescopic pipe (11) has a filter cover (10) at the top inlet. The other pipe of the telescopic pipe (11) is connected to the drainage pipe (12) extending outside the paddy field. The telescopic pipe (11) is connected to the side of the chain (1) away from the float (3) by the other side fixing member (5). The top opening of the telescopic pipe (11) is at the same level as the float (3). The drainage height of the inlet of the telescopic pipe (11) is controlled by the floating of the float (3) on the surface of the paddy field water layer.

2. The automatic water level control device for paddy fields according to claim 1, characterized in that, Also includes: The sleeve (4) is connected to the outside of the float (3); The rotating part (7) is connected to one side of the sleeve (4) via the support rod (8), and the other end of the rotating part (7) is rotatably connected to the fixing part (5). The fixing part (5) is connected to the outside of the chain (1). A shaft is connected to both sides of the rotating member (7) and extends to the outside of the fixed member (5). The rotating member (7) forms a rotating pair with the fixed member (5) through the shaft. The wave control mechanism (6) is connected to the outside of the fixed part (5) and is connected to the shaft drive. The wave control mechanism (6) controls the deflection stroke of the shaft and the rotating part (7).

3. The automatic water level control device for paddy fields according to claim 1, characterized in that, Also includes: Cam (610), connected to one side of the shaft; The control ring (601) is connected to one side of the fixing member (5). The control ring (601) has an arc-shaped inner cavity, and the cam (610) is rotatably connected to the arc-shaped inner cavity. The limiting sleeve (608) is adjustablely connected to the control slots opened on both sides of the arc-shaped inner cavity of the control ring (601). The cam (610) rotates and contacts the limiting sleeves (608) on both sides to limit the deflection stroke.

4. The automatic water level control device for paddy fields according to claim 3, characterized in that, Also includes: Support base (607) is connected to one side of control ring (601); The movable rod (605) is movably connected to the cavity of the support base (607). An adjusting screw (606) is rotatably connected to one side of the movable rod (605). The adjusting screw (606) is externally threaded to a first screw seat. The first screw seat is embedded in one side of the support base (607). The movement of the movable rod (605) in the cavity of the support base (607) is controlled by adjusting the screw (606) on one side of the first screw seat. Two pressure rods (604) are connected to the two ends of one side of the moving rod (605); The limiting tooth plate (602) is slidably connected to the control groove on one side of the control ring (601). The rear side of the limiting tooth plate (602) is rotatably connected to the connecting rod (603), and the other end of the connecting rod (603) is hinged to the pressure rod (604). The directional gear (609) is rotatably connected in the control groove. The outer side of the directional gear (609) is integrally connected with the limiting sleeve (608). The rotation of the control ring (601) is restricted by the meshing of the directional gear (609) and the limiting tooth plate (602).

5. The automatic water level control device for paddy fields according to claim 1, characterized in that, The float (3) is surrounded by multiple hanging rings (15), which are slidably connected to the stepped groove inside the sleeve (4).

6. The automatic water level control device for paddy fields according to claim 1, characterized in that, Also includes: The flow disturbance mechanism (9) is located at the top of the telescopic pipe (11). Impurities are removed by the rotation of the flow disturbance mechanism (9) at the drain outlet at the top of the telescopic pipe (11).

7. The automatic water level control device for paddy fields according to claim 6, characterized in that, The disturbance mechanism (9) includes: The turbulence ring (901) is rotatably connected to the outside of the drain outlet at the top of the telescopic pipe (11), and the top of the turbulence ring (901) is rotatably connected to the filter cover (10); A spoiler (902) is arranged around the spoiler ring (901).

8. The automatic water level control device for paddy fields according to claim 7, characterized in that, The cross-sectional shape of the spoiler (902) is wavy.

9. The automatic water level control device for paddy fields according to claim 7, characterized in that, Also includes: A spiral brake rod (905) is coaxially disposed inside the telescopic tube (11), and the bottom end of the spiral brake rod (905) is connected to the bottom side of the telescopic tube (11) through a fixing ring; The rotating component (904) is rotatably connected to the outside of the spiral brake rod (905). The spiral brake rod (905) has a spiral guide groove on its outside. The rotating component (904) has a protrusion on its inside that contacts the spiral guide groove. The outer periphery of the rotating component (904) is connected to the inside of the turbulence ring (901) through multiple connecting rods (903). When the telescopic tube (11) extends or retracts, causing the rotating frame to move up and down outside the spiral brake rod (905), the spiral guide groove drives the rotating component (904) and the turbulence ring (901) to rotate and turbulence.

10. The automatic water level control device for paddy fields according to claim 1, characterized in that, Also includes: The base (13) is installed on the bottom side of the paddy field; The chain (1) and sprocket (2) are mounted on one side of the fixed plate (14); Assembly slots (16) are provided, and multiple assembly slots (16) are respectively opened through the base (13) and the fixed plate (14) at adjacent ends. The base (13) and the fixed plate (14) are adjusted in terms of assembly depth at the positions of the assembly slots (16) on both sides by assembly bolts.

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