Farmland irrigation system

Abstract

An embodiment of the present specification provides a farm irrigation system, comprising: a reservoir; the irrigation pipeline comprises a water flow input pipeline, a water flow acceleration pipeline and a water flow output pipeline which are sequentially connected from upstream to downstream, the upstream end of the water flow input pipeline is connected with the reservoir, the downstream end of the water flow output pipeline extends into the farmland, and the irrigation pipeline is configured to convey water in the reservoir to the farmland; the upstream end caliber of the water flow acceleration pipeline is larger than the downstream end caliber of the acceleration pipeline, and the downstream end water flow speed of the water flow acceleration pipeline is larger than the upstream end water flow speed of the acceleration pipeline. The generator set is connected with the water flow output pipeline and is configured to convert water potential energy of the water flow in the water flow output pipeline into electric energy; and the energy storage device is connected with the generator set and is configured to store and distribute the electric energy generated by the generator set. The efficient and energy-saving irrigation and power generation integrated system is achieved, and the energy utilization rate is increased.

Description

Technical Field

[0001] The embodiments in this specification relate to the field of farmland irrigation technology, and in particular to a farmland irrigation system. Background Technology

[0002] In farmland irrigation, water used for irrigation is typically transported from a water source (such as a reservoir or river) to the farmland. During this process, the water's position changes, and therefore its potential energy also changes. Generally, water has greater potential energy at higher elevations. As the water flows to lower elevations (such as farmland), its potential energy is gradually converted into kinetic energy or other forms of energy. In the irrigation process, traditional systems often neglect the effective utilization of water potential energy, resulting in a significant waste of energy.

[0003] Currently, there is an urgent need to provide a more reliable solution to address the aforementioned technical problems. Utility Model Content

[0004] In view of this, the embodiments of this specification provide a farmland irrigation system to address the technical deficiencies existing in the prior art.

[0005] According to a first aspect of the embodiments of this specification, a farmland irrigation system is provided, comprising:

[0006] Reservoir;

[0007] An irrigation pipeline includes a water inlet pipe, a water flow acceleration pipe, and a water flow outlet pipe connected sequentially from upstream to downstream. The upstream end of the water inlet pipe is connected to the reservoir, and the downstream end of the water flow outlet pipe extends into the farmland. The irrigation pipeline is configured to transport water from the reservoir to the farmland. The upstream port diameter of the water flow acceleration pipe is larger than the downstream port diameter of the acceleration pipe, and the water flow velocity at the downstream end of the acceleration pipe is greater than the water flow velocity at the upstream end of the acceleration pipe.

[0008] A generator set, connected to the water output pipe, is configured to convert the potential energy of the water flow in the water output pipe into electrical energy.

[0009] An energy storage device, connected to the generator set, is configured to store and distribute the electrical energy generated by the generator set.

[0010] Optionally, the height difference between the two ends of the water flow acceleration pipe is greater than the height difference between the two ends of the water flow output pipe.

[0011] Optionally, the farmland irrigation system further includes a water pump motor, which is located between the water inlet pipe and the water flow acceleration pipe and is configured to draw water from the reservoir into the water inlet pipe.

[0012] Optionally, the irrigation system further includes an intelligent control device, which is electrically connected to the water pump motor, generator set, and energy storage device. The intelligent control device is configured to automatically adjust the speed of the water pump motor, the operating status of the generator set, and the charging and discharging status of the energy storage device according to the irrigation needs of the farmland, the water volume of the reservoir, the power generation status of the generator set, and the energy storage status of the energy storage device.

[0013] Optionally, the intelligent control device includes a sensor unit, a data processing unit, and a control execution unit;

[0014] The sensor unit is configured to detect the soil moisture of farmland, the water level of reservoir, and the output voltage and current of generator set in real time. The data processing unit is configured to receive the data transmitted by the sensor module and analyze and process it according to the preset algorithm model to obtain control commands.

[0015] The control execution unit is configured to automatically adjust the speed of the water pump motor, the operating status of the generator set, and the charging and discharging status of the energy storage device according to the control command.

[0016] Optionally, the energy storage device is connected to at least one load, the load including the water pump motor.

[0017] Optionally, a connecting device is provided on the water output pipe. The connecting device is configured to connect the generator set and the water output pipe, and to make the water flow in the water output pipe contact the rotor of the generator set, so that the rotor rotates with the water flow.

[0018] Optionally, the connecting device is a tee fitting, and a mechanical seal assembly is provided at the connection between the tee fitting and the generator set.

[0019] Optionally, the water inlet pipe and the water outlet pipe are pipes without diameter change, and the diameter of the water inlet pipe is larger than the diameter of the water outlet pipe.

[0020] Optionally, a flow control valve is provided between the water flow acceleration pipe and the water flow output pipe, and the flow control valve is configured to control the flow rate of water in the water flow output pipe.

[0021] One embodiment of this specification involves drawing water from a reservoir through a water inlet pipe, directing the water flow into a water flow acceleration pipe, and then outputting the water to farmland through a water flow outlet pipe. A generator set is installed on the water flow outlet pipe to convert the water's potential energy into electrical energy. Because the downstream diameter of the water flow acceleration pipe is smaller than the upstream diameter, the water flow velocity exiting the acceleration pipe is greater than the water flow velocity entering it, thereby improving the generator set's power generation efficiency. Simultaneously, the generator set is connected to an energy storage device, allowing the generated electrical energy to be stored and distributed. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a farmland irrigation system provided in one embodiment of this specification;

[0023] Figure 2 This is a schematic diagram illustrating the connection between an intelligent control device and other components in a farmland irrigation system, as provided in one embodiment of this specification.

[0024] Figure 3 This is a schematic diagram illustrating the connection between a connecting device and other components in a farmland irrigation system, as provided in one embodiment of this specification.

[0025] Figures 1 to 3 The one-to-one correspondence between the component names and the reference numerals in the figures is as follows:

[0026] 1. Water storage tank; 2. Irrigation pipeline; 21. Water inlet pipeline; 22. Water flow acceleration pipeline; 23. Water outlet pipeline; 24. Connecting device; 3. Generator set; 4. Energy storage device; 5. Water pump motor; 6. Intelligent control device; 7. Load; 8. Flow control valve. Detailed Implementation

[0027] Various exemplary embodiments of this specification will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this specification.

[0028] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this specification or its application or use.

[0029] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0031] The specific embodiments of this specification are described below with reference to the accompanying drawings.

[0032] In this article, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the relative positional relationship between related parts, rather than to define the absolute position of these related parts.

[0033] In this article, "first," "second," etc., are used only to distinguish one another, and not to indicate degree of importance, order, or prerequisite for each other.

[0034] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0035] In farmland irrigation, irrigation water is typically transported from a water source (such as a reservoir or river) to the farmland. During this process, the water's position changes, and its potential energy is correspondingly transformed. Generally, water possesses greater potential energy at higher positions, while as it flows to lower positions (such as farmland), its potential energy gradually transforms into kinetic energy or other forms of energy. Traditional irrigation systems often fail to fully consider the efficient utilization of water potential energy, resulting in a significant waste of energy.

[0036] In response, this specification provides a farmland irrigation system, which will be described in detail in the following embodiments.

[0037] See Figure 1 , Figure 1 This is a schematic diagram of a farmland irrigation system provided in one embodiment of the present specification, including: a water storage tank 1, an irrigation pipeline 2, a generator set 3, and an energy storage device 4.

[0038] The irrigation pipeline 2 includes a water inlet pipeline 21, a water flow acceleration pipeline 22, and a water flow outlet pipeline 23 connected sequentially from upstream to downstream. The upstream end of the water inlet pipeline 21 is connected to the reservoir 1, and the downstream end of the water flow outlet pipeline 23 extends into the farmland. The irrigation pipeline 2 is configured to transport water from the reservoir 1 to the farmland. The upstream port diameter of the water flow acceleration pipeline 22 is larger than the downstream port diameter, and the water flow velocity at the downstream end of the water flow acceleration pipeline 22 is greater than the water flow velocity at the upstream end of the acceleration pipeline. The generator set 3 is connected to the water flow outlet pipeline 23 and is configured to convert the water potential energy of the water flow in the water flow outlet pipeline 23 into electrical energy. The energy storage device 4 is connected to the generator set 3 and is configured to store and distribute the electrical energy generated by the generator set 3.

[0039] Specifically, the irrigation pipe 2 transports water from the reservoir 1 to the farmland. The water inlet pipe 21 and the water flow acceleration pipe 22 of the irrigation pipe 2 are detachably connected. The water flow acceleration pipe 22 and the water flow outlet pipe 23 can be integrally formed or detachably connected.

[0040] The upstream end of the water inlet pipe 21 is connected to the water storage tank 1, and the downstream end is connected to the water flow acceleration pipe 22. It is used to output water from the water storage tank 1 to the water flow acceleration pipe 22. There is a certain height difference between the upstream and downstream ends of the water flow acceleration pipe 22. The water flow acceleration pipe 22 is generally conical, with the diameter of the upstream end being larger than the diameter of the downstream end. This structure results in a greater water flow velocity at the downstream end than at the upstream end. In a preferred embodiment of this specification, the diameter of the upstream end of the water flow acceleration pipe 22 is 50 cm, and the diameter of the downstream end is 32 cm.

[0041] The downstream end of the water flow acceleration pipe 22 is connected to the upstream end of the water flow output pipe 23 to transport water to the farmland. The generator set 3 is installed in the water flow output pipe 23. The high-velocity water flow output from the water flow output pipe 23 passes through the generator set 3 and the generator set 3 converts the water potential energy into electrical energy and stores the electrical energy in the energy storage device 4.

[0042] In summary, this embodiment of the specification, by installing a generator set 3 downstream of the irrigation pipe 2, can convert the water potential energy that would otherwise be wasted in traditional irrigation processes into electrical energy, thereby improving energy utilization efficiency. By installing a water flow acceleration pipe 22, the water flow is accelerated due to the change in pipe diameter during its flow, thus increasing the flow velocity of the water when passing through the generator set 3, and increasing the conversion efficiency between water potential energy and electrical energy. Furthermore, by storing the electrical energy generated by the generator set 3 through the energy storage device 4, it can provide power to the farmland irrigation system or other equipment when needed, thereby achieving effective energy utilization and conservation.

[0043] Furthermore, in order to obtain as much water potential energy as possible from the generator set 3, the height difference between the two ends of the water flow acceleration pipe 22 is greater than the height difference between the two ends of the water flow output pipe 23.

[0044] Specifically, this embodiment addresses the scenario where gravity does positive work in the irrigation pipe 2, meaning a section of the irrigation pipe 2 allows water to flow from a higher to a lower elevation. The water inlet pipe 21 primarily draws water from the reservoir 1; during this process, gravity does negative work or no work. When the water enters the water flow acceleration pipe 22, gravity does positive work. Besides accelerating the water flow, the water flow acceleration pipe 22 also primarily generates water potential energy through the height difference. The height difference between the upstream end of the water flow acceleration pipe 22 and the downstream end of the water flow outlet pipe 23 is generally determined by the height of the reservoir 1 and the farmland, and is fixed. The greater the height difference between the generator set 3 and the upstream end of the water flow acceleration pipe 22, the greater the water potential energy and the higher the efficiency of converting it into electrical energy. Therefore, the water flow outlet pipe 23, where the generator set 3 is located, should be as gentle as possible, i.e., the height difference between its two ends should be as small as possible, while the height difference between the two ends of the water flow acceleration pipe 22 should be as large as possible. The height difference between the two ends of the water flow acceleration pipe 22 is greater than the height difference between the two ends of the water flow output pipe 23, which gives the water in the water flow acceleration pipe 22 higher potential energy, thereby improving the power generation efficiency of the generator set 3.

[0045] In summary, the embodiments of this specification improve energy utilization efficiency by setting the height difference between the two ends of the water flow acceleration pipe 22 to be greater than the height difference between the two ends of the water flow output pipe 23. This allows the water flow to accumulate more potential energy when flowing through the water flow acceleration pipe 22 and convert it into more electrical energy when flowing through the generator set 3.

[0046] Furthermore, the water flow acceleration pipe 22 is spiral-shaped.

[0047] Furthermore, since the reservoir 1 itself has a certain depth, in order to extract water from the low-lying water source, the farmland irrigation system also includes a water pump motor 5. The water pump motor 5 is located between the water inlet pipe 21 and the water flow acceleration pipe 22, and is configured to extract water from the reservoir 1 into the water inlet pipe 21.

[0048] Specifically, the water pump motor 5 is located at the connection between the water inlet pipe 21 and the water flow acceleration pipe 22. The water pump motor 5 is connected to the downstream end of the water inlet pipe 21 and the upstream end of the water flow acceleration pipe 22. The water pump motor 5 is driven by electrical energy to draw water from the water storage tank 1 into the water inlet pipe 21 and send the water into the water flow acceleration pipe 22.

[0049] In summary, this embodiment of the specification, through the connection of the water pump motor 5 with the water inlet pipe 21 and the water flow acceleration pipe 22, effectively extracts low-level water from the reservoir 1 and delivers the water into the irrigation pipe 2. This design not only improves the automation level of the irrigation system but also ensures a continuous water supply, providing a stable water flow for farmland irrigation.

[0050] Furthermore, such as Figure 2 As shown, Figure 2 This is a schematic diagram of the connection between an intelligent control device and other components in a farmland irrigation system according to one embodiment of this specification. In order to reduce the manpower input in the farmland irrigation system, the irrigation system also includes an intelligent control device 6. The intelligent control device 6 is electrically connected to the water pump motor 5, the generator set 3 and the energy storage device 4, and is configured to automatically adjust the speed of the water pump motor 5, the operating status of the generator set 3 and the charging and discharging status of the energy storage device 4 according to the irrigation needs of the farmland, the water volume of the reservoir 1, the power generation status of the generator set 3 and the energy storage status of the energy storage device 4.

[0051] Specifically, the intelligent control device 6 can be installed in a location near the irrigation pipeline 2 for easy monitoring and management. It is electrically connected to the intelligent control device 6, the water pump motor 5, the generator set 3, and the energy storage device 4. The intelligent control device 6 can acquire data monitored by the sensors and generate corresponding control commands, or receive control commands input by the user as needed. Based on these control commands, it controls the speed of the water pump motor 5, the operating status of the generator set 3, and the charging and discharging status of the energy storage device 4.

[0052] In summary, the embodiments described in this specification achieve fully automated control of the farmland irrigation system through the installation of the intelligent control device 6. This not only improves the efficiency and accuracy of the farmland irrigation system but also significantly reduces labor input and operating costs. Through the comprehensive monitoring and adjustment of the intelligent control device 6, the farmland irrigation system can achieve more precise and efficient irrigation operations, providing more stable and suitable water conditions for crop growth.

[0053] Furthermore, the intelligent control device 6 includes a sensor unit, a data processing unit, and a control execution unit; wherein, the sensor unit is configured to detect the soil moisture of the farmland, the water level of the reservoir 1, and the output voltage and current of the generator set 3 in real time; the data processing unit is configured to receive the data transmitted by the sensor module and analyze and process it according to a preset algorithm model to obtain control commands; the control execution module is configured to automatically adjust the speed of the water pump motor 5, the operating status of the generator set 3, and the charging and discharging status of the energy storage device 4 according to the control commands.

[0054] Specifically, the intelligent control device 6 integrates a sensor unit, a data processing unit, and a control execution unit, forming a closed-loop control system.

[0055] The sensor unit is used to establish a communication connection with external sensors, so that the external sensors can transmit the collected data to the intelligent control device 6 in real time. The external sensors include multiple different types of sensors, such as soil moisture sensors, water level sensors, and current and voltage sensors. These sensors are configured to detect key parameters such as soil moisture in farmland, water level in reservoir 1, and output voltage and current of generator set 3 in real time.

[0056] The data processing unit receives data transmitted from external sensors and performs fast and accurate analysis using a preset algorithm model.

[0057] The control execution unit generates control commands based on the data processing results of the data processing unit to adjust the speed of the water pump motor 5, the operating status of the generator set 3, and the charging and discharging status of the energy storage device 4.

[0058] The automatic adjustment mechanism described in this specification not only improves irrigation efficiency but also reduces labor costs, making farmland irrigation more intelligent and convenient. Parameters can be flexibly set and adjusted according to the actual needs of the farmland and the specific conditions of the irrigation system.

[0059] Furthermore, in order to improve the overall utilization rate of electrical energy in the irrigation system, the energy storage device 4 can provide the stored electrical energy to other electrical equipment in the farmland irrigation system after storing sufficient electrical energy. The energy storage device 4 is connected to at least one load 7, the load 7 including the water pump motor 5.

[0060] Specifically, the energy storage device 4 can be connected to the water pump motor 5 alone, or it can be connected to other equipment, such as lighting systems, monitoring systems, etc. When these loads 7 have power needs and the energy storage device 4 has enough stored power, the intelligent control device 6 will prioritize the use of the energy storage device 4 to ensure the efficient use of power.

[0061] Furthermore, the energy storage device 4 can also output excess electrical energy to the external power grid, realizing the rational utilization and distribution of electrical energy. This design not only improves the energy efficiency of the irrigation system itself, but also contributes to the sustainable use of energy and environmental protection.

[0062] In summary, the embodiments in this specification construct an efficient and intelligent energy management system by introducing a generator set and an energy storage device 4 into the farmland irrigation system, thereby realizing the optimized allocation and recycling of electrical energy.

[0063] Furthermore, such as Figure 3 As shown, Figure 3This is a schematic diagram illustrating the connection between a connecting device and other components in a farmland irrigation system according to one embodiment of this specification. To ensure the stability and safety of the connection between the generator set 3 and the water output pipe 23, a connecting device 24 is provided on the water output pipe 23. The connecting device 24 is configured to connect the generator set 3 and the water output pipe 23, and to bring the water flow in the water output pipe 23 into contact with the rotor of the generator set 3, which rotates with the water flow. The connecting device is a tee fitting, and a mechanical seal assembly is provided at the connection between the tee fitting and the generator set.

[0064] Specifically, the connecting device 24 can be a tee fitting, with both ends connected to the water output pipe 23 and the other end connected to the generator set 3 interface, ensuring smooth water flow and no leakage. Mechanical seal components and fasteners are provided at the connection between the generator and the tee fitting to improve the durability and reliability of the connection and reduce maintenance frequency. Furthermore, the generator can be an external rotor generator, with its rotor in direct contact with the water flow through the tee fitting, utilizing the water flow power to drive the rotor's rotation and efficiently converting water energy into electrical energy. Since the rotor of the generator set 3 needs to be in contact with water for extended periods, the rotor itself is also waterproofed to ensure stable operation even in humid environments.

[0065] In summary, the embodiments of this specification use the connecting device 24 to tightly connect the generator set 3 and the water output pipe 23, ensuring the stability and safety of the connection between the generator set 3 and the irrigation pipe 2, further improving the power conversion efficiency and reducing the risk of system failure.

[0066] Furthermore, the water inlet pipe 21 and the water outlet pipe 23 are pipes without diameter change, and the diameter of the water inlet pipe 21 is larger than the diameter of the water outlet pipe 23.

[0067] Specifically, the downstream end of the water inlet pipe 21 is connected to the upstream end of the water flow acceleration pipe 22. The diameter of the water flow acceleration pipe 22 gradually decreases, creating a pressure difference that accelerates the water flow, thereby improving power generation efficiency. The water inlet pipe 21 has a relatively large diameter to ensure sufficient water intake, while the tapering design of the water flow acceleration pipe 22 effectively increases the water flow velocity. The water outlet pipe 23 has a smaller diameter to ensure that the water maintains a high flow velocity after passing through the generator set 3. The water inlet pipe 21 and the water outlet pipe 23 are non-reducing pipes, ensuring that the water flow is unaffected by changes in pipe diameter when entering and leaving the irrigation pipe 2, thus guaranteeing the stability of the water flow.

[0068] In summary, the embodiments of this specification have achieved an effective increase in water flow velocity by optimizing the design of the diameter of the water inlet pipe 21 and the water outlet pipe 23, thereby improving power generation efficiency while ensuring the stability and continuity of the water flow.

[0069] Furthermore, a flow control valve 8 is provided between the water flow acceleration pipe 22 and the water flow output pipe 23. The flow control valve 8 is configured to control the flow rate of water in the water flow output pipe 23.

[0070] Specifically, the flow control valve 8 can be adjusted according to demand. The larger the opening of the flow control valve 8, the smaller the pressure difference between it and the upstream end of the water flow acceleration pipe 22, and the slower the water flow speed. Conversely, the smaller the opening, the larger the pressure difference and the faster the water flow speed. Adjusting the opening of the flow control valve 8 within a suitable range can effectively control the water flow speed.

[0071] In summary, the embodiments in this specification achieve flexible control of water flow velocity by precisely adjusting the flow control valve 8, further optimizing power generation efficiency, ensuring efficient and stable operation of the system under different operating conditions, and reducing operating costs and maintenance difficulty.

[0072] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of this disclosure is defined by the appended claims.

Claims

1. A farmland irrigation system, characterized in that, include: Water storage tank (1); An irrigation pipe (2) includes a water inlet pipe (21), a water flow acceleration pipe (22), and a water flow outlet pipe (23) connected sequentially from upstream to downstream. The upstream end of the water inlet pipe (21) is connected to the reservoir (1), and the downstream end of the water flow outlet pipe (23) extends into the farmland. The irrigation pipe (2) is configured to transport water from the reservoir (1) to the farmland. The upstream port diameter of the water flow acceleration pipe (22) is larger than the downstream port diameter of the acceleration pipe, and the water flow velocity at the downstream end of the water flow acceleration pipe (22) is greater than the water flow velocity at the upstream end of the acceleration pipe. The generator set (3), connected to the water output pipe (23), is configured to convert the water potential energy of the water flow in the water output pipe (23) into electrical energy; An energy storage device (4) is connected to the generator set (3) and is configured to store and distribute the electrical energy generated by the generator set (3).

2. The farmland irrigation system according to claim 1, characterized in that, The height difference between the two ends of the water flow acceleration pipe (22) is greater than the height difference between the two ends of the water flow output pipe (23).

3. The farmland irrigation system according to claim 1, characterized in that, The farmland irrigation system also includes a water pump motor (5), which is located between the water inlet pipe (21) and the water flow acceleration pipe (22) and is configured to draw water from the reservoir (1) into the water inlet pipe (21).

4. The farmland irrigation system according to claim 3, characterized in that, The farmland irrigation system also includes an intelligent control device (6), which is electrically connected to the water pump motor (5), generator set (3) and energy storage device (4). It is configured to automatically adjust the speed of the water pump motor (5), the operating status of the generator set (3) and the charging and discharging status of the energy storage device (4) according to the irrigation needs of the farmland, the water volume of the reservoir (1), the power generation status of the generator set (3) and the energy storage status of the energy storage device (4).

5. The farmland irrigation system according to claim 4, characterized in that, The intelligent control device (6) includes a sensor unit, a data processing unit, and a control execution unit; The sensor unit is configured to detect the soil moisture of farmland, the water level of reservoir (1), and the output voltage and current of generator set (3) in real time. The data processing unit is configured to receive the data transmitted by the sensor module and analyze and process it according to the preset algorithm model to obtain control commands. The control execution unit is configured to automatically adjust the speed of the water pump motor (5), the operating status of the generator set (3), and the charging and discharging status of the energy storage device (4) according to the control command.

6. The farmland irrigation system according to claim 3, characterized in that, The energy storage device (4) is connected to at least one load (7), the load (7) including the water pump motor (5).

7. The farmland irrigation system according to claim 1, characterized in that, A connecting device (24) is provided on the water output pipe (23). The connecting device (24) is configured to connect the generator set (3) and the water output pipe (23), and to make the water flow in the water output pipe (23) contact the rotor of the generator set (3), and the rotor rotates with the water flow.

8. The farmland irrigation system according to claim 7, characterized in that, The connecting device is a tee fitting, and a mechanical seal assembly is provided at the connection between the tee fitting and the generator set (3).

9. The farmland irrigation system according to claim 1, characterized in that, The water inlet pipe (21) and the water outlet pipe (23) are pipes without diameter change, and the diameter of the water inlet pipe (21) is larger than the diameter of the water outlet pipe (23).

10. The farmland irrigation system according to claim 1, characterized in that, A flow control valve (8) is provided between the water flow acceleration pipe (22) and the water flow output pipe (23), and the flow control valve (8) is configured to control the flow rate of water in the water flow output pipe (23).

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