Solar and water flow energy complementary power supply remote farmland irrigation electric valve

Abstract

The utility model discloses a solar energy and water flow energy complementary power supply's remote farmland irrigation electric valve relates to farmland irrigation valve technical field. It includes valve body, valve core, power supply system, drive mechanism and control system, and power supply system includes solar cell panel, water current generator and battery, and through double energy complementation solves the problem of no power grid coverage or single power supply instability, and drive mechanism drives valve core to realize water flow control, and control system gathers flow pressure information through sensor, and realizes remote monitoring and control in combination with 4G communication module. The device breaks through farmland electric valve power supply bottleneck, can remote control and automatically cope with the exception, satisfies the demand of large -scale farmland intelligent irrigation, and promotes irrigation stability and efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of farmland irrigation valve technology, and in particular relates to a remote farmland irrigation electric valve that is powered by complementary solar energy and water flow energy, which is suitable for large-scale intelligent farmland irrigation systems. Background Technology

[0002] In modern large-scale agricultural planting, the stable operation of farmland irrigation systems directly affects crop yield and quality. As a core control component of the irrigation system, the performance and practicality of electric valves play a decisive role in overall irrigation efficiency. With the acceleration of agricultural intelligence, traditional farmland irrigation electric valves have gradually revealed several technical shortcomings, making it difficult to meet the high-efficiency irrigation needs of modern farmland. Specific problems are as follows: Firstly, the power supply mode has obvious limitations. Farmland is mostly distributed in remote areas, where grid coverage is costly and difficult to construct, making it difficult for electric valves to rely on mains power. In existing solutions, single-battery power requires frequent manual battery replacements, which not only increases manpower input but also easily leads to electric valve shutdown and interruption of irrigation due to untimely replacements. Single-solar power supply is significantly constrained by natural conditions. In cloudy or rainy weather, at night, or in seasons with insufficient sunlight, the stability of the power supply drops significantly, and there may even be situations where the power is exhausted and the valve cannot work, which seriously affects the irrigation schedule and thus has an adverse effect on crop growth.

[0003] Secondly, there is a lack of effective remote monitoring and intelligent control capabilities. Traditional electric valves require on-site operation by staff to cut off or reverse water flow. For large-scale farmland, the workload of manual inspection and operation is enormous, resulting in low management efficiency and an inability to monitor the real-time operating status of the irrigation system. When problems such as abnormal flow (e.g., a sudden decrease in flow due to pipe blockage or excessive flow due to valve malfunction) or unstable pressure (e.g., excessively high pressure leading to pipe rupture or excessively low pressure causing uneven irrigation) occur in the irrigation pipes, staff often fail to detect them in time. They often have to wait until obvious irrigation problems (e.g., crops withering due to lack of water or pipe leaks) occur before taking action, which not only increases maintenance costs but also wastes water resources and causes crop yield losses.

[0004] Third, there is a lack of emergency control mechanisms. Most existing electric valves rely on motor drives. If the motor malfunctions (e.g., circuit faults, component damage), the equipment must be disassembled for repair or the motor replaced to restore control. This process is time-consuming, during which the irrigation system is completely paralyzed, making it impossible to adjust water flow temporarily. For crops requiring precise irrigation timing (e.g., seedlings, flowering stages), irrigation interruptions can easily cause irreversible damage. Furthermore, while some electric valves have manual adjustment mechanisms, their operation is complex and requires specialized tools, hindering rapid emergency response and further reducing the reliability of the irrigation system.

[0005] In summary, the current deficiencies of electric irrigation valves in terms of power supply stability, remote control capabilities, and emergency response have become key factors restricting the development of intelligent irrigation in modern agriculture. Therefore, there is an urgent need to develop an electric irrigation valve for farmland that does not rely on the power grid, has a stable power supply, and possesses remote real-time monitoring, intelligent control, and convenient emergency control functions. This would address the pain points of existing technologies and meet the needs of efficient, stable, and intelligent irrigation for large-scale farmland. Utility Model Content

[0006] This invention addresses the problems of unstable power supply and lack of remote monitoring and intelligent control capabilities in existing farmland irrigation electric valves by providing a remote farmland irrigation electric valve powered by complementary solar and water flow energy.

[0007] To solve the above-mentioned technical problems, this utility model provides a remote farmland irrigation electric valve that uses a combination of solar energy and water flow energy for power supply. It comprises five core parts: valve body, valve core, power supply system, drive mechanism, and control system. The structure and connection relationships of each part are as follows: Valve body structure: The valve body contains a cylindrical hollow valve cavity, providing space for water flow and valve core installation. One end of the valve cavity is closed, with a bushing at the center of its bottom surface for rotational positioning with the valve core; the other end is open, allowing for the detachable assembly of the valve cover, housing, and housing cover, facilitating the installation, inspection, and maintenance of internal components. A valve handle through-hole is provided at the connection between the valve cover and housing for the valve core spindle to pass through. A radially connected inlet pipe is located at the bottom of the valve body, serving as the channel for water to enter the valve cavity; a first and second radially connected outlet pipe are located on the left and right sides of the valve body, respectively, for water to flow out, enabling irrigation in different directions.

[0008] Valve core structure: The valve core consists of an arc-shaped gate, plate arms connecting both ends of the gate, and an inner short shaft and a valve core main shaft connected to the plate arms respectively. The inner short shaft is rotatably connected to the bushing at the closed end of the valve cavity, and the valve core main shaft passes through the valve handle through hole in the valve cover via a sealing element, allowing the valve core to rotate stably within the valve cavity. Different rotation positions of the gate control the opening and closing, and reversing, of the inlet pipe, the first outlet pipe, and the second outlet pipe: When the gate rotates downwards, the inlet pipe is closed, and the entire valve is closed; when the gate rotates to the left, the inlet pipe is open, the first outlet pipe is closed, and water flows out from the second outlet pipe; when the gate rotates to the right, the inlet pipe is open, the second outlet pipe is closed, and water flows out from the first outlet pipe; when the gate rotates upwards, the inlet pipe is open, and water flows out from both the first and second outlet pipes simultaneously. Furthermore, a sealing ring is provided on the outer side of the gate to effectively seal the ports of each water pipe on the inner wall of the valve cavity, preventing leakage.

[0009] Power Supply System: The power supply system includes solar panels, a hydroelectric generator, and a battery, employing a complementary power supply method of solar and hydroelectric energy to ensure a stable power supply to the electric valve. Solar panels are installed on the upper part of the valve body to absorb solar energy and convert it into electrical energy. A hydroelectric generator is installed on the inlet pipe, using the flowing water within the pipe to drive a generator impeller, converting water flow energy into electrical energy. The electrical energy generated by the solar panels and hydroelectric generator is processed by a charging circuit on the circuit board (equipped with voltage regulation, rectification, and overcharge / over-discharge protection functions). Part of the energy directly powers the electrical components, while the other part is stored in the battery. The battery provides power to the entire electric valve's drive mechanism, control system, and other electrical components. For ease of installation and maintenance, the hydroelectric generator is sealed to the generator mounting port on the inlet pipe wall via a sealing gasket. Its main body is located outside the inlet pipe, with the generator impeller extending into the water flow channel. The battery is installed inside a housing.

[0010] Drive Mechanism: The drive mechanism, located inside the housing, includes a motor and a gear reducer, used to drive the valve core rotation. The gear reducer has an electric input shaft, a manual input shaft, and an output shaft. One end of the output shaft is connected to the valve core main shaft, and the other end is connected to a pointer located on the outside of the housing cover. The pointer rotates with the output shaft, allowing operators to visually understand the current status of the gate through its position. The motor is coaxially connected to the electric input shaft of the gear reducer. During normal operation, the motor operates under the control of the control system, and after being decelerated by the gear reducer, it drives the output shaft to rotate, thereby driving the valve core main shaft to rotate and achieving gate rotation. In case of motor failure or special circumstances, the gear reducer can be manually driven via the manual input shaft to control the valve core rotation, improving the reliability of the device.

[0011] Control System: The control system includes a circuit board, a first flow and pressure sensor, and a second flow and pressure sensor, enabling intelligent control and remote monitoring of the electric valve. The first and second flow and pressure sensors are respectively installed on the first and second outlet pipes. Both are integrated flow and pressure sensors; the pressure detection section uses a diffused silicon pressure transmitter, and the flow sensor uses a magnetic rotary Hall sensor (containing a Hall element and a rotating wheel with embedded magnets). The sensors are sealed to the corresponding sensor mounting ports on the pipe walls via sealing gaskets. Their probes extend into the water flow channels of the pipes, collecting real-time flow and pressure information, which is then transmitted to the controller on the circuit board via a signal acquisition circuit.

[0012] The controller, charging circuit, signal acquisition circuit, drive control circuit, and 4G communication module are integrated onto a single circuit board. The charging circuit's input is connected to the solar panel and hydrogen generator, while its output is connected to the battery. The signal acquisition circuit's input is connected to the flow and pressure sensors, and its output is connected to the controller. The drive control circuit's input is connected to the controller, and its output is connected to the motor. The 4G communication module is bidirectionally electrically connected to the controller. Operators send control commands via a remote terminal, which are transmitted to the controller via the 4G communication module. The controller then controls the motor's operation through the drive control circuit, enabling remote control of the gate. Simultaneously, the controller can feed back data collected by the sensors, such as flow and pressure information and the electric valve's operating status, to the remote terminal via the 4G communication module for real-time monitoring by the operator. When the sensors detect abnormal flow or pressure, they transmit the abnormal signal to the controller. After analysis and judgment, the controller sends an adjustment command to the motor through the drive control circuit, driving the valve core to rotate and adjust the gate's position, ensuring stable operation of the irrigation system.

[0013] Compared with existing electric valves for farmland irrigation, this utility model has the following advantages: 1. Solve the power supply problem and ensure continuous operation. By employing a complementary power supply method combining solar and hydroelectric power, the limitations of a single power supply mode are overcome. When sunlight is abundant, solar panels can efficiently generate electricity and store it in batteries. When sunlight is insufficient but water flow is normal, a hydroelectric generator can utilize the water flow to generate electricity, supplementing the power supply. The batteries can then power the device when no power generation is available, achieving a stable, all-weather power supply without relying on the power grid. This also avoids the hassle of frequent battery replacements, significantly reducing labor and operating costs, and ensuring the electric valve operates continuously and stably under various weather and operating conditions.

[0014] 2. Enable remote monitoring and control to improve management efficiency. By establishing two-way communication with a remote terminal via a 4G communication module, staff can monitor the real-time operating status of the electric valves (such as gate position, water flow and pressure) on the remote terminal without having to go to the farmland. They can also remotely send control commands to adjust the gate position and control water flow interruption and reversal. For large-scale farmland, this greatly reduces the workload of manual inspection and on-site operation, significantly improves the management efficiency of the irrigation system, and reduces management costs.

[0015] 3. Intelligent response to anomalies to ensure stable irrigation The control system monitors the flow and pressure information of the outlet pipe in real time through flow and pressure sensors. When the flow is too large or too small, or the pressure is abnormal, the sensor can transmit the abnormal signal to the controller in a timely manner. After the controller quickly analyzes and judges the situation, it automatically sends an adjustment command to the drive mechanism to drive the gate to adjust its position, such as closing part of the outlet pipe or adjusting the opening of the inlet pipe, thereby solving the abnormal problem and avoiding uneven irrigation or pipe damage caused by abnormal water flow. This ensures the stable operation of the irrigation system and provides stable irrigation conditions for crop growth.

[0016] 4. Reliable structure, easy installation and maintenance A sealing ring is provided on the outer side of the gate, and the water flow generator and sensor are installed through sealing gaskets to effectively prevent water leakage and reduce maintenance failures. The valve cover, housing and housing cover can be detachably assembled at the valve cavity opening end, and the core components are concentrated in the housing for easy maintenance. The drive mechanism is equipped with a manual input shaft, which can be directly controlled manually in case of motor failure, shortening emergency maintenance time and improving the practicality of the device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model from the upper left front view. Figure 2 This is a schematic diagram of the overall structure of this utility model from the upper right rear view. Figure 3 This is a schematic diagram of the valve body, valve core, first flow pressure sensor, and second flow pressure sensor from the upper left front view of this utility model. Figure 4 This is a schematic diagram of the valve body, the first flow pressure sensor, and the second flow pressure sensor of this utility model from the upper left front view. Figure 5 This is a schematic diagram of the valve core of this utility model; Figure 6 This is a structural schematic diagram of the box body and valve cover of this utility model; Figure 7 This is a schematic diagram of the structure of the housing of this utility model and the battery, motor and gear reducer installed inside it; Figure 8 This is a schematic diagram of the structure of the water flow generator of this utility model; Figure 9 This is a schematic diagram of the structure of the flow and pressure sensors (first and second) of this utility model; Figure 10 This is a schematic diagram of the internal structure of the flow and pressure sensor of this utility model.

[0018] Main component numbering description: 10 Valve body, 11 Valve cavity, 12 Bushing, 13 Valve cover, 14 Housing, 15 Cover, 16 Valve handle through hole, 17 Inlet pipe, 18 First outlet pipe, 19 Second outlet pipe, 20 Valve core, 21 Gate, 22 Plate arm, 23 Inner short shaft, 24 Valve core main shaft, 25 Sealing ring, 31 Solar panel, 32 Water flow generator, 33 Battery, 41 Motor, 42 Gear reducer, 43 Manual input shaft, 44 Output shaft, 45 Pointer, 51 First flow and pressure sensor, 52 Second flow and pressure sensor, 53 Diffused silicon pressure transmitter, 54 Hall element, 55 Rotary wheel, 56 Magnet. Detailed Implementation

[0019] The following is in conjunction with the instruction manual. Figures 1 to 10 The present invention will describe in detail the composition and structure of specific embodiments of the present invention. These embodiments are only used to explain the present invention and do not constitute a limitation on its protection scope.

[0020] (I) Overall Composition The remote farmland irrigation electric valve powered by complementary solar and water flow energy in this embodiment consists of five core parts: valve body, valve core, power supply system, drive mechanism, and control system. These components are connected mechanically or electrically to form a complete device. The specific assembly relationship is as follows: The valve body (10) has a cylindrical hollow valve cavity (11) inside, which serves as the core space for water flow and valve core installation. One end of the valve cavity (11) is closed, and a fixed bushing (12) is welded to the center of the bottom surface of the closed end for the rotation positioning of the valve core; the other end is an open structure, and the valve cover (13), the box body (14) and the box cover (15) can be detachably assembled at the open end by bolts. The valve cover (13) is close to the open end of the valve body, the box body (14) is fixed to the outside of the valve cover (13), and the box cover (15) is fastened to the top of the box body (14). The three form a closed space to accommodate the internal components. A valve handle through hole (16) is provided at the connection between the valve cover (13) and the box body (14). A sealing element is installed in the through hole to allow the valve core spindle (24) to pass through and prevent water leakage. A water inlet pipe (17) is provided at the bottom of the valve body (10) to connect the valve chamber (11) radially, serving as a channel for water to enter the device; a first water outlet pipe (18) and a second water outlet pipe (19) are provided on the left and right sides of the valve body (10) to connect the valve chamber (11) radially, for water diversion and output.

[0021] The valve core (20) consists of a gate (21), a plate arm (22), an inner short shaft (23), and a valve core main shaft (24), all of which are integrated. The gate (21) is an arc-shaped plate structure, the curvature of which matches the curvature of the inner wall of the valve cavity (11). The outer side of the gate (21) is fixed with a sealing ring (25) through a slot. The sealing ring (25) can cover the ports of the inlet pipe (17), the first outlet pipe (18), and the second outlet pipe (19) on the inner wall of the valve cavity (11) to achieve a seal and prevent leakage. The plate arm (22) consists of two fan-shaped plates, which are vertically fixed to both ends of the gate plate (21). One end of the inner short shaft (23) is vertically fixed to the end of one of the plate arms (22), and the other end is inserted into the bushing (12) at the closed end of the valve body (10), and can rotate freely in the bushing (12). One end of the valve core main shaft (24) is vertically fixed to the end of the other plate arm (22), and the other end passes through the valve handle through hole (16) at the connection between the valve cover (13) and the box body (14), and extends into the box body (14). A seal is installed between the valve core main shaft (24) and the valve handle through hole (16) to prevent water from leaking into the box body (14).

[0022] The power supply system includes a solar panel (31), a water flow generator (32), and a battery (33). The solar panel (31) is fixed to the upper part of the valve body (10) by a bracket. The output end of the solar panel (31) is connected to the charging circuit input end of the circuit board inside the box (14) by a wire. The input end of the battery (33) is connected to the output end of the charging circuit. The charging circuit has overcharge and over-discharge protection functions. The output end of the battery (33) is connected to the power supply interface of the circuit board to supply power to the electrical components. A generator installation port is opened on the wall of the water inlet pipe (17). The water flow generator (32) is sealed to the generator installation port by a sealing gasket. The main body of the water flow generator (32) is located on the outside of the wall of the water inlet pipe (17). Its generator impeller extends into the water flow channel of the water inlet pipe (17) through the generator installation port and can be driven to rotate by the water flow. The output end of the water flow generator (32) is also connected to the circuit board by a wire. The battery (33) is installed inside the box (14) by a fixed bracket. The input end of the battery (33) is connected to the charging circuit on the circuit board, and the output end is connected to the power supply interface on the circuit board to provide power to the electrical components of the entire device.

[0023] The drive mechanism is installed inside the housing (14) and consists of a motor (41) and a gear reducer (42). The gear reducer (42) has three shaft ends: an electric input shaft, a manual input shaft (43), and an output shaft (44). The electric input shaft is coaxially connected to the output shaft of the motor (41), and the output shaft (44) is fixed to the end of the valve core main shaft (24) by a key connection. The manual input shaft (43) extends to the outside of the housing (14) and can be rotated by an external tool. The motor (41) is fixed on the gear reducer on the inner wall of the housing (14), and the power cord of the motor (41) is connected to the drive control circuit on the circuit board. The output shaft (44) of the gear reducer (42) also extends to the outside of the cover (15), and a pointer (45) is fixed at the end. The position of the pointer (45) on the outside of the cover (15) is marked with gear scale ("closed", "left open", "right open", "fully open"), and the state of the gate (21) can be intuitively judged by the position of the pointer (45).

[0024] The control system includes a circuit board, a first flow pressure sensor (51), and a second flow pressure sensor (52). The circuit board is mounted inside the housing (14) by a fixing post. The circuit board integrates a controller, a charging circuit, a signal acquisition circuit, a drive control circuit, and a 4G communication module. Each circuit module is connected by copper foil lines to form a complete control loop. The first flow pressure sensor (51) and the second flow pressure sensor (52) are both flow and pressure integrated sensors. The pressure detection part uses a diffused silicon pressure transmitter (53), and the flow sensor uses a magnetic rotary Hall sensor with a Hall element (54) and a wheel (55) with an embedded magnet (56). Sensor mounting ports are opened on the walls of the first water outlet pipe (18) and the second water outlet pipe (19). The first flow pressure sensor (51) and the second flow pressure sensor (52) are respectively sealed to the corresponding sensor mounting ports by sealing gaskets. The probes of both extend into the water flow channel of the water pipe through the mounting ports, and the main body is fixed on the outside of the water pipe. The signal output terminals of the first flow pressure sensor (51) and the second flow pressure sensor (52) are connected to the signal acquisition circuit of the circuit board by wires. The 4G communication module connects to an external network via an antenna, enabling signal interaction with remote mobile phones or computer terminals; the controller is electrically connected to the charging circuit, signal acquisition circuit, drive control circuit, and 4G communication module, serving as the core processing unit of the control system.

[0025] (II) Working Principle 1. Complementary power supply principle Under sunlight: The solar panel (31) absorbs solar energy and converts it into electrical energy. The electrical energy is transmitted to the charging circuit of the circuit board. After being regulated and rectified, part of it directly powers the motor (41), controller, 4G communication module and other electrical components, while the other part is stored in the battery (33).

[0026] When water flows: the water flow in the inlet pipe (17) drives the impeller of the water flow generator (32) to rotate. The water flow generator (32) converts the water flow energy into electrical energy, which is then processed by the charging circuit to supplement power supply or stored in the battery (33).

[0027] When there is no light and no water flow: the battery (33) automatically discharges and provides power to each electrical component through the circuit board, so as to achieve uninterrupted power supply around the clock.

[0028] 2. Control and Monitoring Principles Data acquisition: The first flow and pressure sensor (51) and the second flow and pressure sensor (52) collect the flow rate and pressure data of the corresponding water outlet pipe in real time. The data is amplified and filtered by the signal acquisition circuit and then transmitted to the controller.

[0029] Remote interaction: The 4G communication module enables two-way communication between the controller and the remote terminal. The staff sends control commands through the remote terminal, and the commands are transmitted to the controller via the 4G module. At the same time, the controller feeds back the collected flow pressure data, gate (21) position (judged by the pointer (45) linkage signal) and other working status information to the remote terminal.

[0030] Automatic and manual control: Under normal operating conditions, the controller controls the motor (41) to run through the drive control circuit according to remote instructions or abnormal data (such as flow / pressure exceeding the preset range); the motor (41) drives the electric input shaft of the gear reducer (42) to rotate, and after deceleration, the output shaft (44) drives the valve core main shaft (24) to rotate, thereby driving the gate (21) to rotate, realizing the interruption or reversal of water flow; if the motor (41) fails, the position of the gate (21) can be adjusted by directly driving the gear reducer (42) through rotating the manual input shaft (43).

[0031] (III) Instructions for Use 1. Initial installation and debugging Pipeline connection: Connect the inlet pipe (17) to the main irrigation pipeline of the farmland through a flange or thread to ensure a seal; connect the first outlet pipe (18) and the second outlet pipe (19) to the irrigation branch pipelines of the corresponding farmland zones respectively.

[0032] Device networking: Search for the signal of the 4G communication module through a remote terminal (mobile phone / computer) to complete the device binding; check whether the solar panel (31) is compatible with the local light, and ensure that the impeller of the water flow generator (32) can be driven normally by the water flow.

[0033] Function debugging: Send “close”, “left open”, “right open” and “full open” commands through the remote terminal and observe whether the pointer (45) matches the command position. At the same time, check whether the feedback data of the flow pressure sensor is normal. If the position of the gate (21) is deviated, it can be finely adjusted and calibrated by manually inputting the shaft (43).

[0034] 2. Routine Irrigation Operations Remote control: According to the irrigation needs of farmland, select the corresponding mode on the remote terminal. For example, when irrigating the farmland on the left, send the "left open" command, the gate (21) rotates to the right, closes the second water outlet pipe (19), and the water flows out from the first water outlet pipe (18); when irrigating the farmland on both sides, send the "full open" command, the gate (21) rotates to the top, and the water flows out from both water outlet pipes at the same time; after the irrigation is completed, send the "close" command, the gate (21) rotates to the bottom, and closes the water inlet pipe (17).

[0035] Real-time monitoring: View flow and pressure data in real time on the remote terminal. If the data is abnormal (such as a sudden increase in pressure may indicate pipe blockage), the controller will automatically issue an adjustment command to drive the gate (21) to make a fine adjustment. If the abnormality is not relieved, the remote terminal will receive an alarm prompt, and staff can investigate the problem in time.

[0036] 3. Emergency Response and Maintenance Emergency operation: If the motor (41) fails or is powered off, use the matching tool to insert the manual input shaft (43) and rotate it clockwise / counterclockwise to manually adjust the position of the gate (21) to ensure that irrigation is not interrupted.

[0037] Routine maintenance: Regularly check the valve body (10) and water pipe connection for leaks. If the seal fails, replace the sealing gasket or sealing ring (25). Clean the dust on the surface of the solar panel (31) to ensure light collection efficiency. Check the battery (33) power. If it has not been charged for a long time (such as continuous rain), charge the battery (33) through the external interface.

Claims

1. A remote-controlled electric valve for farmland irrigation powered by a combination of solar energy and water flow energy, characterized in that, The system includes a valve body (10), a valve core (20), a power supply system, a drive mechanism, and a control system. The valve body (10) contains a cylindrical hollow valve cavity (11). A water inlet pipe (17) is provided at the bottom of the valve body (10) and radially connected to the valve cavity (11). A first water outlet pipe (18) and a second water outlet pipe (19) are provided on the left and right sides, respectively. The valve core (20) is rotatably disposed in the valve cavity (11) and is used to control the opening and closing and reversing of the water inlet pipe (17), the first water outlet pipe (18), and the second water outlet pipe (19). The power supply system includes a solar panel (31), a water flow generator (32), and a battery (33). The water flow generator (32) is disposed on the water inlet pipe (17), and the solar panel (31) is installed on the valve body (10). The electrical energy generated by the two components is processed by the charging circuit on the circuit board and stored in the battery (33); the drive mechanism is connected to the valve core (20) and is used to drive the valve core (20) to rotate; the control system includes a circuit board, a first flow pressure sensor (51) and a second flow pressure sensor (52). The first flow pressure sensor (51) and the second flow pressure sensor (52) are respectively installed on the first water outlet pipe (18) and the second water outlet pipe (19). The circuit board includes a controller, a charging circuit, a signal acquisition circuit, a drive control circuit and a 4G communication module. The 4G communication module is electrically connected to the controller. The flow pressure sensor is electrically connected to the controller through the signal acquisition circuit. The drive mechanism is electrically connected to the controller through the drive control circuit.

2. The remote farmland irrigation electric valve powered by complementary solar and hydropower as described in claim 1, characterized in that, The valve cavity (11) is closed at one end, with a bushing (12) at the center of the bottom surface of the closed end, and open at the other end. The valve cover (13), the box body (14) and the box cover (15) can be detachably assembled at the open end. A valve handle through hole (16) is provided at the connection between the valve cover (13) and the box body (14).

3. The remote farmland irrigation electric valve powered by complementary solar and hydropower as described in claim 1, characterized in that, The valve core (20) consists of an arc-shaped gate (21), a plate arm (22) connecting the two ends of the gate (21), and an inner short shaft (23) and a valve core main shaft (24) connected to the plate arm (22) respectively. The inner short shaft (23) is rotatably connected to the bushing (12) at the closed end of the valve cavity (11), and the valve core main shaft (24) passes through the valve handle through hole (16) of the valve cover (13) through the sealing element.

4. The remote farmland irrigation electric valve powered by complementary solar and water flow energy as described in claim 3, characterized in that, The outer side of the gate (21) is provided with a sealing ring (25), which can seal the ports of the inlet pipe (17), the first outlet pipe (18), and the second outlet pipe (19) on the inner wall of the valve cavity (11).

5. The remote farmland irrigation electric valve powered by complementary solar and hydropower as described in claim 1, characterized in that, The drive mechanism includes a motor (41) and a gear reducer (42) disposed inside the housing (14). The gear reducer (42) includes an electric input shaft, a manual input shaft (43) and an output shaft (44). One end of the output shaft (44) is connected to the valve core spindle (24), and the other end of the output shaft (44) is connected to a pointer (45) located outside the housing cover (15). The motor (41) is coaxially connected to the electric input shaft.

6. The remote farmland irrigation electric valve powered by complementary solar and hydropower as described in claim 1, characterized in that, The water inlet pipe (17) has a generator installation port on its pipe wall. The water flow generator (32) is sealed to the generator installation port through a sealing gasket. The main body of the water flow generator (32) is located outside the pipe wall of the water inlet pipe (17), and the generator impeller extends into the water flow channel of the water inlet pipe (17).

7. The remote farmland irrigation electric valve powered by complementary solar and hydropower as described in claim 1, characterized in that, Sensor mounting ports are provided on the walls of the first water outlet pipe (18) and the second water outlet pipe (19). The first flow pressure sensor (51) and the second flow pressure sensor (52) are respectively sealed and installed with the corresponding sensor mounting ports through sealing gaskets. The probe of the first flow pressure sensor (51) extends into the water flow channel of the first water outlet pipe (18), and the probe of the second flow pressure sensor (52) extends into the water flow channel of the second water outlet pipe (19).

8. The remote farmland irrigation electric valve powered by complementary solar and hydropower as described in claim 1, characterized in that, The first flow pressure sensor (51) and the second flow pressure sensor (52) are integrated flow and pressure sensors. The pressure detection part adopts a diffused silicon pressure transmitter (53), and the flow detection part adopts a magnetic wheel Hall sensor. The magnetic wheel Hall sensor includes a Hall element (54) and a wheel (55). Magnets (56) are embedded on the blades of the wheel (55).

9. The remote farmland irrigation electric valve powered by complementary solar and hydropower as described in claim 1, characterized in that, The battery (33) and the circuit board are both installed inside the housing (14).

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