Farmland drainage device for automatically controlling suitable water level of paddy field

Abstract

The utility model discloses a kind of farmland drainage devices of automatic control suitable water level of rice field, to solve the technical problems such as the difficulty of existing drainage device to realize the precise regulation and control suitable water depth of rice in different growth periods, electrical driving component is prone to damp due to low installation position, poor reliability etc. The technical scheme of the utility model includes shell, water level sensor, main control console, ball valve assembly etc. Its core structure is that ball valve is fixed at the bottom drain port of shell, ball valve actuator is installed in the upper middle part of shell, and is separated from ball valve in vertical space, while the upper end of transmission shaft is connected with ball valve actuator, and the lower end is connected with valve core of ball valve. The utility model automatically controls current water level by identifying water surface height of different growth period rice field;Meanwhile, due to humid factors in rice field environment, through the transmission layout of "vertical decoupling", electrical actuator and the humid environment of bottom are physically isolated, and the waterproof and moisture-proof performance of device is simultaneously improved.

Description

Technical Field

[0001] This utility model relates to a farmland drainage device, and more particularly to a farmland drainage device that automatically controls the appropriate water level in paddy fields, belonging to the field of agricultural irrigation technology. Background Technology

[0002] Scientific and rational field water management plays a crucial role in the growth, yield, and quality of rice. Rice has significantly different water depth requirements at different growth stages (such as the greening stage, tillering stage, and jointing and booting stage). Precise water level control is a key technical guarantee for achieving high and stable rice yields and water-saving irrigation, and it has important engineering value for improving agricultural resource utilization efficiency and developing modern precision agriculture.

[0003] To automate drainage, some automatic drainage devices have emerged in existing technologies. One type is the traditional manually operated device, which relies on farmers' experience to manually open and close the gates or valves set at the drainage outlets on the field ridges. The other type is a simple automatic control system, which usually uses an integrated electric valve (such as a solenoid valve, or an electric ball valve with the actuator directly coupled to the valve body) in conjunction with a simple water level sensor (such as a float switch). In this type of solution, on the one hand, the drainage limit is difficult to adapt to the suitable water depth for different growth stages of rice; on the other hand, the entire electric valve unit, including the valve body and electrical drive components, is installed at the low-lying drainage outlet.

[0004] However, the existing solutions described above have serious technical flaws in practical applications, mainly manifested in reliability and durability issues caused by unreasonable structural layout. Specifically, existing automatic devices typically integrate electrical drive components (such as motors and actuators) with the valve body in a close-coupled manner. Since the valve itself must be installed at a low-lying drainage outlet on the field ridge, this location is in a harsh environment, constantly exposed to high humidity, mud and water splashes, and even flooding by rainwater. This structural layout causes the electrical drive components to be directly exposed to the high-humidity environment, making them highly susceptible to moisture intrusion, corrosion of circuit components, or short circuits, leading to frequent actuator failures and poor overall device reliability. Furthermore, this low-lying integrated structure also makes maintenance difficult. When the control unit or drive component malfunctions (which is common in high-humidity environments), maintenance personnel must perform repairs in muddy, low-lying areas in the field, which is extremely inconvenient. Simultaneously, the close proximity of the control circuit and the mechanical actuator makes them susceptible to vibration and heat interference, affecting the stability of the control system. Utility Model Content

[0005] Purpose of the utility model: Based on the problems mentioned in the background art, this invention proposes a farmland drainage device that automatically controls the appropriate water level in paddy fields.

[0006] Technical solution: An automatic drainage device for paddy fields to control the appropriate water level, including:

[0007] chassis;

[0008] A water level sensor is installed on the outer side of the upper part of the housing;

[0009] The main control console is located on the upper part of the casing and is electrically connected to the water level sensor; the main control console receives the measurement data from the water level sensor.

[0010] A ball valve assembly is installed in the middle of the housing; the ball valve assembly is electrically connected to the main control panel; the control end of the ball valve assembly is provided with a flow channel; the space where the main control panel is located is sealed and far away from the ball valve assembly;

[0011] A base is attached to the housing; the base is used to mount the control end of the ball valve assembly.

[0012] In a further embodiment, the ball valve assembly includes:

[0013] A ball valve actuator is installed in the upper middle part of the housing; the ball valve actuator is electrically connected to the main control panel.

[0014] A ball valve having a horizontal flow channel and being fixed to the base;

[0015] A drive shaft is provided, which is arranged vertically. The upper end of the drive shaft is connected to the output end of the ball valve actuator. The lower end of the drive shaft passes through the top of the base and is connected to the valve core of the ball valve. The drive shaft is rotatably mounted on the top of the base.

[0016] In a further embodiment, a ball valve bayonet is installed on the base for securing the ball valve.

[0017] In a further embodiment, the output shaft of the ball valve actuator, the drive shaft, and the valve core of the ball valve are coaxially arranged in the vertical direction.

[0018] In a further embodiment, the flow path of the ball valve has its axis orthogonal to the axis of the drive shaft.

[0019] In a further embodiment, a lower support platform is also installed inside the housing. The ball valve actuator is fixedly installed through the lower support platform, and its output end passes through the lower support platform and is connected to the drive shaft through a threaded interface.

[0020] In a further embodiment, an upper support platform and a middle support platform are also provided inside the housing. The middle support platform is used to install the main control console; the upper support platform is used to install the battery pack; and a solar panel is installed on the top of the housing.

[0021] In a further embodiment, the battery pack includes:

[0022] Charging controller;

[0023] The battery is electrically connected to the solar panel via the charging controller;

[0024] A charging controller button is connected to the charging controller;

[0025] The wiring terminal is connected to the charging controller.

[0026] In a further embodiment, the water level sensor includes:

[0027] An ultrasonic sensor is used to measure the distance from its output end to the water surface.

[0028] The connector has one end for mounting the ultrasonic sensor and the other end connected to the outside of the housing.

[0029] In a further embodiment, the main control console includes:

[0030] A circuit board, on which a button group is provided; the button group includes an up button, a down button, a left button, a right button, and a middle button; the button group corresponds to the reproductive period settings;

[0031] The display screen is electrically connected to the circuit board;

[0032] A switch, with a telecommunications connection, is attached to the circuit board.

[0033] Beneficial effects:

[0034] 1. The water level sensor monitors the current farmland water level in real time and transmits the data to the main control console. The main control console then controls the ball valve assembly to drain or maintain the water in the farmland, thus achieving automated control.

[0035] 2. This application uses multiple support platforms to place electronic components at high positions according to the actual working conditions of farmland drainage, and uses upper and middle support platforms for installation and isolation, so that vulnerable electronic components are kept away from the farmland environment, thereby extending the service life of electronic components.

[0036] 3. The output shaft, drive shaft, and valve core of the ball valve actuator are arranged along the same vertical central axis. When the actuator receives a signal and rotates, its torque is precisely transmitted to the valve core below through this rigid drive shaft, realizing the mechanical function of high-position drive and low-position execution. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0038] Figure 2 This is a schematic diagram of the structure of this utility model from another perspective.

[0039] Figures 1 to 2 The components are labeled as follows: 1. Housing; 2. Base; 4. Solar panel; 6. Main control panel; 7. Ball valve assembly; 11. Upper support platform; 12. Middle support platform; 13. Lower support platform; 31. Ultrasonic sensor; 32. Connector; 51. Battery; 52. Charging controller button; 53. Terminal block; 61. Circuit board; 62. Display screen; 63. Switch; 64. Button group; 71. Ball valve actuator; 72. Threaded interface; 73. Drive shaft; 74. Ball valve; 75. Ball valve bayonet. Detailed Implementation

[0040] The present invention will be further described below with reference to the accompanying drawings.

[0041] Example 1

[0042] Please see the appendix Figure 1 Appendix Figure 2 This utility model discloses an automatic drainage device for paddy fields that can precisely control the appropriate water depth and water level.

[0043] like Figure 1 As shown, this device is preferably installed on the ridge of the paddy field, with the water flow direction of the ball valve 74 (e.g., Figure 1 (As shown by the dashed arrow) is perpendicular to the field ridge.

[0044] This device mainly consists of four modules: the casing, the water level sensor, the main control console 6, the ball valve assembly, and the power supply system. More detailed specifications are as follows:

[0045] The housing 1 and the base 2 together form the main frame of the device. The housing 1 serves as the protective shell of the device, and its interior is also provided with screw holes for maintenance or fixation.

[0046] The water level sensor specifically includes an ultrasonic sensor 31, which is installed on the outer side of the upper part of the housing 1 via a connector 32. The connector 2 is preferably L-shaped, with one end fixed to the outer side of the housing 1 and the other end extending horizontally, so that the probe of the ultrasonic sensor 31 faces downward and is suspended outside the main structure of the device. This part monitors the water level changes in real time through the principle of ultrasonic ranging.

[0047] The main control panel 6 includes a circuit board 61, which is housed within the casing 1. For example... Figure 1 As shown, circuit board 61 is fixedly installed in the space separated by the middle support platform 12 and the upper support platform 11. Circuit board 61 is the circuit control unit of the drainage device, and it is also equipped with a switch 63 for human-machine interaction, a display screen 62, and an operable button group 64, which specifically includes an up button, a down button, a left button, a right button, and a middle button. Figure 1 As shown, the space where the main control console is located is sealed and physically isolated from the ball valve assembly; the two are only electrically connected.

[0048] The ball valve assembly is telecommunication-connected to the main control console 6 to receive commands from the main control console 6. The ball valve assembly specifically includes a ball valve actuator 71, a threaded interface 72, a drive shaft 73, a ball valve 74, and a ball valve bayonet 75. The ball valve actuator 71 is mounted via the central support platform 12 and is located below the circuit board 61. Figure 1 As shown. Ball valve 74 is provided with a horizontal flow channel, such as... Figure 1 As indicated by the dashed arrow, and fixed to the base 2, the drive shaft 73 is mounted vertically. The upper end of the drive shaft 73 connects to the output end of the ball valve actuator 71, specifically via a threaded interface 72 located at the bottom of the ball valve actuator 71. The lower end of the drive shaft 73 passes through the lower support platform 13 inside the housing 1 and connects to the valve core of the ball valve 74, as shown by the dashed arrow. Figure 1 As shown, the assembly method uses screws for fastening. This structure allows the rotational torque of the ball valve actuator 71 to be transmitted to the ball valve 74 via the drive shaft 73, enabling remote control of the valve.

[0049] In addition, the device in this embodiment also includes a power supply system. Please continue to refer to... Figure 1 The power supply system includes a solar panel 4 mounted on the top of the housing 1, and a charging controller and a battery 51 located inside the housing 1. The charging controller has a charging controller button 52 for operation and a charging controller terminal block 53 for wiring. The solar panel 4 converts solar energy into electrical energy, which is used to charge the battery 51 through the charging controller. The battery 51 provides power to all electrical components of the device, such as the main control circuit board 61, the ultrasonic sensor 31, and the ball valve actuator 71.

[0050] Example 2

[0051] As a preferred embodiment, the mechanical drive and actuation structure of this device adopts a vertically decoupled tower-like spatial layout. The design intent of this approach is to place the vulnerable electrical drive components high in the dry area, while placing the valve components that must come into contact with water at the drain outlet, thus addressing the challenges posed by this spatial separation through a specific transmission structure.

[0052] According to one aspect of this application, such as Figure 2 As shown, the ball valve 74 is rigidly fixed to the base 2.

[0053] According to one aspect of this application, to ensure that the ball valve 74 remains stable under water flow impact or actuator torque, the base 2 is preferably provided with an integrally formed or post-welded ball valve bayonet 75. Figure 1 and 2 As shown, the inner contour of the bayonet fits tightly against the housing of the ball valve 74, providing axial and radial positioning and thus securing it firmly to the base. This rigid fixation is fundamental to achieving subsequent precise torque transmission.

[0054] According to one aspect of this application, housing 1 is vertically fixed to device base 2 and extends upward. Ball valve actuator 71 (which typically contains a motor and reduction gear) is located in the upper middle part of housing 1, and is significantly separated from ball valve 74 mounted on base 2 in vertical space.

[0055] In actual farmland drainage operations, ball valve 74 is often installed at the low-lying drainage outlet on the field ridge, a location that is damp and easily flooded with mud and water. Meanwhile, the ball valve actuator 71, as an electrical component, is susceptible to moisture damage. This solution addresses this by installing the actuator at a higher position, away from moisture sources, while simultaneously installing the ball valve 74 at a lower position at the drainage outlet. The connection between the two is resolved through a subsequent transmission structure, significantly improving the device's durability and environmental adaptability.

[0056] According to one aspect of this application, to connect the spatially separated ball valve actuator 71 and ball valve 74, the device is provided with a slender drive shaft 73. The drive shaft 73 is arranged vertically, with its upper end connected to the output end of the ball valve actuator 71, and its lower end passing through the interior of the housing 1 and connected to the ball valve core inside the ball valve 74. This design ensures that the output shaft of the ball valve actuator 71, the drive shaft 73, and the valve core of the ball valve 74 are arranged along the same vertical central axis. When the actuator receives a signal and rotates, its torque is precisely transmitted to the lower valve core through this rigid drive shaft 73, achieving the mechanical function of high-position drive and low-position execution.

[0057] Although the drive shaft 73 is a rigid shaft in this embodiment, in other embodiments, if it is difficult to install the actuator and the ball valve 74 with coaxiality, a flexible drive shaft can also be used for connection, which can also transmit torque, and all fall within the protection scope of this invention.

[0058] According to one aspect of this application, the horizontal flow channel of the ball valve 74, such as Figure 1 As indicated by the dashed arrow, the water flow axis is orthogonal to the vertical rotation axis of the drive shaft 73.

[0059] This structure represents the standard application form of a ball valve, but its combination with the vertical layout of this device makes it suitable for applications installed on paddy field ridges. Water needs to flow horizontally across the ridges for discharge, while the main body of the device is installed vertically on the ridges. When the main control panel 6 issues a command, the ball valve actuator 71 drives the vertical drive shaft 73 to rotate, which in turn drives the valve core to rotate, thereby opening or closing the horizontal flow channel to achieve drainage or water storage.

[0060] Example 3

[0061] To realize and support the vertical decoupled drive structure of Embodiment 2, the internal structure of the housing 1 of this device adopts a vertically layered assembly structure with functional partitions.

[0062] According to one aspect of this application, the interior of the housing 1 also includes a lower support platform 13, which is preferably a horizontal metal or engineering plastic partition plate, horizontally fixed to the inner wall of the housing 1 by screws or welding. The lower support platform 13 has a pre-set through hole, on which the ball valve actuator 71 is fixed, and its output end passes through the through hole. The lower support platform 13 structurally serves a "connecting upper and lower" function. Firstly, it provides a stable mounting base for the upper ball valve actuator 71; secondly, it physically divides the internal space of the housing 1 into an upper "mechanical and electrical compartment" and a lower "drive shaft compartment".

[0063] According to one aspect of this application, the ball valve actuator 71 is rigidly fixed to the upper surface of the lower support platform 13.

[0064] This rigid fixation is crucial. When the ball valve actuator 71 outputs torque and attempts to rotate the valve core of the ball valve 74 via the drive shaft 73, the valve core, especially under water pressure or with sediment buildup, may generate a reverse resistance torque. This reverse torque is applied to the actuator housing. The lower support platform 13, through its rigid connection to the housing 1, absorbs this reverse torque, ensuring that the actuator body does not idle, thus allowing its output torque to effectively act on the drive shaft 73.

[0065] According to one aspect of this application, such as Figure 1 As shown, above the lower support platform 13, at least one middle support platform is also fixed inside the housing 1.

[0066] A circuit board 61, a switch 63, and a display screen 62 are fixedly mounted on the central support platform 12. To facilitate user operation, the circuit board 61 is also equipped with physical operation buttons, specifically including an up button, a down button, a left button, a right button, and a center button.

[0067] The charging controller and battery 51 in the power supply module are fixed on the uppermost support platform 11.

[0068] This layered layout effectively isolates the precision electrical control layer, centered on circuit board 61, from the mechanical actuation layer, centered on ball valve actuator 71. This isolation design, on the one hand, places the precision circuit board 61 and display screen 62 at the highest point of the housing 1, maximizing moisture and water protection; on the other hand, it also prevents the heat and vibration generated during actuator operation from interfering with the circuit board 61, ensuring the stability of the control system.

[0069] In other embodiments, the aforementioned support platform can be combined into a single L-shaped or C-shaped chassis liner, or installed using a guide rail slide. As long as the purpose of fixing the control module and actuator module in layers in vertical space can be achieved, they should all be considered as equivalent structures of the present invention.

[0070] Example 4

[0071] like Figure 1 As shown in the figure, this embodiment describes in detail the water level sensor installation structure of an agricultural drainage device for automatically controlling the appropriate water level in paddy fields.

[0072] According to one aspect of this application, the device further includes an L-shaped connector 32. One end of the L-shaped connector 32 is securely fixed to the upper side wall of the housing 1 by bolts or welding. The ultrasonic sensor 31 is fixed to the other end of the L-shaped connector 32.

[0073] This structure allows the ultrasonic sensor 31 to be cantilevered outside the housing 1. The effect of this cantilevered spatial layout is as follows:

[0074] Interference Isolation and Accuracy Guarantee: The probe of the ultrasonic sensor 31 is positioned outside the main structure of the housing 1 to ensure that it detects the actual height of the paddy field water surface from the outside of the device. This also avoids interference from local water eddies or water level drops that may form near the housing 1 when the device is draining water, thus ensuring the accuracy of real-time acquisition of paddy field water depth data.

[0075] To avoid signal obstruction, the L-shaped connector 32 extends horizontally, ensuring that the ultrasonic probe of the ultrasonic water level sensor 31 can face vertically downwards, with no obstructions in the detection area directly below it, thus enabling reliable real-time monitoring of water level changes through the principle of ultrasonic ranging.

[0076] In other alternative embodiments, the connector 32 may also be a straight rod, a bent rod, or a bracket of other shapes. As long as it can stably arrange the probe of the ultrasonic water level sensor 31 outside the housing 1 to monitor the water level of the paddy field, it should fall within the protection scope of this invention.

[0077] Example 5

[0078] like Figure 1 and Figure 2 As shown, this embodiment relates to the ball valve fixing structure in Embodiment 2.

[0079] According to one aspect of this application, the device base 2 is provided with a ball valve bayonet 75, which is used to position and fix the ball valve 74.

[0080] Specifically, such as Figure 2 As shown, the device base 2 is preferably a U-shaped plate structure or a frame structure, with structures for supporting the ball valve 74 provided on the vertical walls on both sides. The ball valve bayonet 75 is preferably at least a pair of semi-circular clamping members or U-shaped clamps. The ball valve bayonet 75 is connected to the device base 2 by bolts or welding, etc., together rigidly clamping and fixing the cylindrical shell of the ball valve 74 onto the base 2.

[0081] The advantage of this solution is that:

[0082] 1. It withstands and absorbs reverse torque, providing a stable base for torque transmission in Embodiment 2 (i.e., actuator-drive shaft 73-valve spool). When the drive shaft 73 applies rotational torque to the valve spool of the ball valve 74, the bayonet and base 2 provide the necessary reverse fixing torque for the housing of the ball valve 74. This rigid constraint prevents the housing of the ball valve 74 from rotating with the valve spool (i.e., idling), ensuring that the torque output by the actuator can be effectively used to open or close the valve spool.

[0083] 2. Resist water flow impact, ensuring that ball valve 74, as a drain outlet, can resist the impact of water flow when facing large-volume drainage caused by frequent rainstorms, keeping its position stable and preventing displacement or vibration.

[0084] In other alternative embodiments, the ball valve 74 can also be bolted to the base 2 via a flange structure, or directly welded to the opening of the base 2. As long as the rigid fixation of the ball valve 74 can be achieved and the torque can be effectively transmitted, it should be considered as an equivalent structure of the present invention.

[0085] Example 6

[0086] This embodiment describes the specific installation and parameter setting method of the automatic paddy field drainage device of this utility model for controlling the appropriate water level, as well as its complete workflow in practical application. The workflow of this embodiment fully demonstrates the collaborative working relationship between the various structural components (such as ultrasonic sensor 31, main control panel 6, ball valve actuator 71, drive shaft 73, ball valve 74, etc.) of embodiments 1 to 5.

[0087] I. Installation and Parameter Setting of the Device

[0088] As attached Figure 1 As shown, the installation and setup steps for this device are as follows:

[0089] ① Installation and Start-up: Install the device shown on the paddy field ridge, ensuring the water flow direction of ball valve 74 (e.g., Figure 1 (As shown by the dotted arrow) Perpendicular to the field ridge, meaning the drainage outlet faces outwards. Press switch 6; the display screen 7 lights up, indicating the device is powered on.

[0090] ② Distance Correction Setting: Press the middle button on the main control circuit board to enter the setting menu. Use the up and down buttons to navigate to the correction menu. Based on the actual distance from the ultrasonic sensor 1 probe to the paddy field water surface, use the left button to decrease the distance value or the right button to increase the distance value. After setting, press the middle button again to save.

[0091] ③ Rice Type Setting: Press the middle key to enter the settings, and use the up and down keys to navigate to the rice menu. Depending on the actual planting type, use the left and right keys to select "early rice," "mid-season rice," or "late rice." After setting, press the middle key again to save. The design intent of this setting is to allow the main control circuit board 61 to retrieve the drainage threshold table for the corresponding rice type from its internal database, as shown in Table 1.

[0092] Table 1. Depth of drainage control water layer at different growth stages of different rice types (unit: mm)

[0093]

[0094] ④ Growth Stage Settings: Press the middle key to enter the settings, and use the up and down keys to navigate to the "Growth Stage" menu. Depending on the current growth stage of the rice, use the left and right keys to set the "Greening Stage," "Tillering Stage," "Jointing and Booting Stage," "Heading and Flowering Stage," or "Milk Stage," etc. After setting, press the middle key again to save. This setting is used to lock the specific "Allowable Water Storage Depth (h)" and "Temporary Water Storage Upper Limit (H)" for the corresponding growth stage in Table 1 on the main control circuit board 61.

[0095] ⑤ Setting the number of days in the maternity period: Press the middle button to enter the settings, and use the up and down buttons to navigate to the "Time" menu. Use the left and right buttons to set the remaining or cumulative number of days in the current maternity period. After setting, press the middle button to save. This function is used to automatically switch the device to the next maternity period.

[0096] ⑥ Start working: After completing all the settings according to the above requirements, press the up button and the device will start to enter the automatic working state.

[0097] II. Case Study of the Device's Working Process

[0098] The following uses "early rice" as an example to explain in detail the automatic drainage process of the device at different growth stages. The control thresholds are referred to Table 1 in the technical solution.

[0099] Drainage Initiation During Greening Period: When irrigation or rainfall causes the field water depth to reach or exceed 80mm (the "temporary water storage limit H" during the greening period), the cantilevered ultrasonic water level sensor 1 transmits real-time water level information back to the main control circuit board 61 inside the housing 1. Action Execution: The main control panel 6 determines that the water level has reached H and immediately sends an "open" control command to the ball valve actuator 71. The ball valve actuator 71 (motor) starts, and its output torque is transmitted to the ball valve 74 at the bottom through the vertical drive shaft 73, causing its valve core to rotate, opening the horizontal drainage channel, and initiating drainage. Drainage Stoppage: When the field surface water level drops to 50mm (the "allowable water storage depth h" during the greening period) through drainage, the sensor 1 again transmits the real-time water level information back to the main control panel 6. Action Execution: The main control circuit board 61 determines that the water level has reached h and immediately sends a "close" control command to the ball valve actuator 71. The drive shaft 73 rotates in the reverse direction, closing the ball valve 74, ending drainage.

[0100] Initial drainage during tillering: When the water depth reaches 100mm (H), the actuator on the main control panel 6 opens ball valve 74 to begin drainage. Drainage stops: When the water depth drops to 70mm (h), the actuator on the main control panel 6 closes ball valve 74 to end drainage.

[0101] Drainage begins at the end of tillering: When the water depth reaches 120mm (H), the actuator on the main control panel 6 opens the ball valve 74 to begin drainage. Drainage stops: When the water depth drops to 80mm (h), the actuator on the main control panel 6 closes the ball valve 74 to end drainage.

[0102] Drainage is initiated during the jointing and heading stage: When the water depth reaches 180 mm (H), the main control console 6 actuator 11 opens the ball valve 74 to begin drainage. Drainage is stopped: When the water depth drops to 90 mm (h), the main control console 6 actuator 11 closes the ball valve 74 to end drainage.

[0103] Drainage is initiated during the heading and flowering stage: When the water depth reaches 180 mm (H), the main control console 6 actuator 11 opens the ball valve 74 to begin drainage. Drainage is stopped: When the water depth drops to 80 mm (h), the main control console 6 actuator 11 closes the ball valve 74 to end drainage.

[0104] Initiating drainage during the milk ripening stage: When the water depth reaches 100mm (H), the main control panel 6 actuator 11 opens the ball valve 74 to begin drainage. Stopping drainage: When the water depth drops to 60mm (h), the main control panel 6 actuator 11 closes the ball valve 74 to end drainage.

[0105] The workflow of this embodiment fully demonstrates that the structural design of this device, especially the structures of embodiments 2 and 3, can perfectly execute its complex control logic and achieve precise and automatic regulation of the appropriate water depth throughout the entire growth period of rice.

[0106] It should be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

Claims

1. A farmland drainage device for automatically controlling the appropriate water level in paddy fields, characterized in that, include: chassis; A water level sensor is installed on the outer side of the upper part of the housing; The main control console is located on the upper part of the casing and is electrically connected to the water level sensor; the main control console receives the measurement data from the water level sensor. A ball valve assembly is installed in the middle of the housing; the ball valve assembly is electrically connected to the main control panel; the control end of the ball valve assembly is provided with a flow channel; the space where the main control panel is located is sealed and far away from the ball valve assembly; A base is attached to the housing; the base is used to mount the control end of the ball valve assembly.

2. The farmland drainage device for automatically controlling the appropriate water level in paddy fields according to claim 1, characterized in that, The ball valve assembly includes: A ball valve actuator is installed in the upper middle part of the housing; the ball valve actuator is electrically connected to the main control panel. A ball valve having a horizontal flow channel and being fixed to the base; A drive shaft is provided, which is arranged vertically. The upper end of the drive shaft is connected to the output end of the ball valve actuator. The lower end of the drive shaft passes through the top of the base and is connected to the valve core of the ball valve. The drive shaft is rotatably mounted on the top of the base.

3. The farmland drainage device for automatically controlling the appropriate water level in paddy fields according to claim 2, characterized in that, The base is equipped with a ball valve bayonet, which is used to fix the ball valve.

4. The farmland drainage device for automatically controlling the appropriate water level in paddy fields according to claim 2, characterized in that, The output shaft of the ball valve actuator, the transmission shaft, and the valve core of the ball valve are coaxially arranged in the vertical direction.

5. The farmland drainage device for automatically controlling the appropriate water level in paddy fields according to claim 2, characterized in that, The flow channel of the ball valve has its axis orthogonal to the axis of the drive shaft.

6. The farmland drainage device for automatically controlling the appropriate water level in paddy fields according to claim 2, characterized in that, The housing is also equipped with a lower support platform. The ball valve actuator is fixedly installed through the lower support platform, and its output end passes through the lower support platform and is connected to the drive shaft through a threaded interface.

7. The farmland drainage device for automatically controlling the appropriate water level in paddy fields according to claim 5, characterized in that, The casing also includes an upper support platform and a middle support platform. The middle support platform is used to install the main control console. The upper support platform is used to install the battery pack. A solar panel is installed on the top of the casing.

8. The farmland drainage device for automatically controlling the appropriate water level in paddy fields according to claim 7, characterized in that, The battery pack includes: Charging controller; The battery is electrically connected to the solar panel via the charging controller; A charging controller button is connected to the charging controller; The wiring terminal is connected to the charging controller.

9. The farmland drainage device for automatically controlling the appropriate water level in paddy fields according to claim 1, characterized in that, The water level sensor includes: An ultrasonic sensor is used to measure the distance from its output end to the water surface. The connector has one end for mounting the ultrasonic sensor and the other end connected to the outside of the housing.

10. The farmland drainage device for automatically controlling the appropriate water level in paddy fields according to claim 1, characterized in that, The main control console includes: A circuit board, on which a button group is provided; the button group includes an up button, a down button, a left button, a right button, and a middle button; the button group corresponds to the reproductive period settings; The display screen is electrically connected to the circuit board; A switch, with a telecommunications connection, is attached to the circuit board.

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