A municipal green belt water-saving irrigation system

Abstract

The utility model discloses a kind of municipal green belt water-saving irrigation systems, including water supply unit, irrigation unit and control unit. Water supply unit adopts pipe network structure, including main pipeline and shunt box. Irrigation unit is set in green belt interior by branch pipe, including drip irrigation belt, sprinkler head and soil humidity sensor. Control unit is fixed in the side of water supply unit, including flow detection module, signal processor and valve controller. System is through zoning irrigation structure, adjusting nozzle, pressure stabilizing structure, self-adapting irrigation system, anti-blocking structure and quick maintenance structure, realizes accurate water supply and efficient management.

Description

Technical Field

[0001] This utility model relates to the field of garden irrigation equipment technology, and in particular to a water-saving irrigation system for municipal green belts. Background Technology

[0002] As an important component of urban ecological landscapes, the irrigation management of municipal green belts has a significant impact on water resource utilization efficiency. Currently, municipal greening projects generally employ timed sprinkler or flood irrigation methods, which suffer from structural defects such as uneven water resource distribution and a mismatch between plant water requirements. Existing irrigation systems mostly adopt fixed pipe network layouts and unified control modes, lacking dynamic adjustment mechanisms between water delivery pipes and sprinkler components. This leads to localized insufficient irrigation during dry seasons and runoff waste during rainy seasons. While traditional sprinkler irrigation devices can achieve basic irrigation functions, their sprinkler structure has physical limitations such as fixed coverage and non-adjustable water outlet angles, making it difficult to adapt to the differentiated water requirements of different vegetation types. Furthermore, conventional drip irrigation systems are prone to dripper blockage due to impurity accumulation during long-term operation, affecting irrigation uniformity. Therefore, it is necessary to develop a water-saving irrigation system for municipal green belts to solve the technical problems of low water resource utilization caused by insufficient irrigation control precision and structural defects in existing technologies. Utility Model Content

[0003] The purpose of this utility model is to provide a water-saving irrigation system for municipal green belts, which solves the problems mentioned in the background art.

[0004] This utility model is implemented as follows: a water-saving irrigation system for municipal green belts.

[0005] It includes a water supply unit, an irrigation unit, and a control unit. The water supply unit uses a pipe network structure. The irrigation unit is installed inside the green belt via branch pipes. The control unit is fixed to the side of the water supply unit.

[0006] The water supply unit includes a main pipeline and a distribution box. The main pipeline is made of polyethylene. The distribution box is fixed to the side wall of the main pipeline via flange connections. The irrigation unit includes drip tape, sprinkler heads, and a soil moisture sensor. The drip tape is connected to the end of the branch pipe via quick connectors. The sprinkler heads are threaded onto the surface of the drip tape. The soil moisture sensor is embedded in the soil of the green belt. The control unit includes a flow detection module, a signal processor, and a valve controller. The flow detection module is soldered to the control unit circuit board. The signal processor is integrated inside the control unit. The valve controller is connected to the irrigation unit via wiring.

[0007] During operation, drip irrigation tape is laid out along the green belt, while sprinkler heads provide auxiliary spraying. Soil moisture sensors monitor soil moisture content in real time. The flow detection module and signal processor work together to analyze irrigation demand, and the valve controller dynamically adjusts water supply parameters based on the analysis results.

[0008] As a further improvement, the drip irrigation tape features a zoned irrigation structure. This structure includes a main irrigation zone and an auxiliary irrigation zone. The main irrigation zone uses porous drip irrigation tape. The auxiliary irrigation zone is connected to the side of the main irrigation zone via connecting pipes. This zoned irrigation structure allows for differentiated water supply to different plants, improving water resource utilization efficiency.

[0009] As a further improvement, the sprinkler head is equipped with an adjustable nozzle. The adjustable nozzle consists of a nozzle core and a guide vane. The nozzle core is made of engineering plastic. The guide vane is mounted inside the nozzle via a pivot. The adjustable nozzle adapts to different spraying needs, providing optimal water mist coverage.

[0010] As a further improvement, the water supply unit is equipped with a pressure stabilizing structure. This structure includes a pressure-stabilizing tank, a pressure-reducing valve, and a pressure gauge. The pressure-stabilizing tank is welded to the middle of the main pipeline. The pressure-reducing valve is located at the outlet of the pressure-stabilizing tank. The pressure gauge is installed to the side of the pressure-reducing valve. The pressure stabilizing structure maintains a constant system pressure, ensuring uniform irrigation.

[0011] As a further improvement, the control unit is equipped with an adaptive irrigation system. The adaptive irrigation system includes a data acquisition unit, an analysis calculator, and an irrigation regulator. The data acquisition unit connects to various sensors. The analysis calculator is integrated into the signal processor. The irrigation regulator is connected to the irrigation unit via an electric actuator. The adaptive irrigation system automatically adjusts irrigation parameters according to environmental changes, achieving precise water volume control.

[0012] As a further improvement, the irrigation unit is equipped with an anti-clogging structure. This structure includes a filter screen, a backwash valve, and a drain outlet. The filter screen is embedded in the drip tape inlet. The backwash valve is located at the end of the branch pipe. The drain outlet connects to the bottom of the backwash valve. This anti-clogging structure prevents the accumulation of impurities and ensures stable system operation.

[0013] As a further improvement, the water supply unit is equipped with a quick-maintenance structure. This structure includes a manhole, an observation window, and a test interface. The manhole is located above the main pipeline on the ground. The observation window is embedded in the manhole cover. The test interface is located on the side of the control unit. This quick-maintenance structure facilitates system inspection and component replacement, reducing maintenance complexity.

[0014] In summary, this utility model's municipal greenbelt water-saving irrigation system achieves precise water supply and efficient management of greenbelt vegetation through a collaborative design of zoned irrigation and adaptive control. Its adjustable nozzles and pressure stabilization structure significantly improve the device's adaptability and reliability, while anti-clogging and rapid maintenance further optimize the equipment's ease of operation and long-term operational stability. It effectively solves the technical problem of low water resource utilization caused by insufficient control precision and defects in the water delivery structure of traditional irrigation systems. Attached Figure Description

[0015] Figure 1This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the maintenance well in this utility model;

[0017] Figure 3 This is a partially enlarged structural schematic diagram of the present invention;

[0018] Figure 4 This is a system block diagram of the present invention.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Water supply unit; 2. Irrigation unit; 3. Control unit; 4. Main pipeline; 5. Distribution box; 6. Drip irrigation tape; 7. Sprinkler head; 8. Soil moisture sensor; 9. Flow detection module; 10. Signal processor; 11. Valve controller; 12. Main irrigation area; 13. Auxiliary irrigation area; 14. Nozzle core; 15. Flow guide plate; 16. Pressure stabilizing tank; 17. Pressure reducing valve; 18. Pressure gauge; 19. Data acquisition unit; 20. Analyzer; 21. Irrigation regulator; 22. Filter screen; 23. Backwash valve; 24. Drain outlet; 25. Inspection well; 26. Observation window; 27. Test interface. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0022] Example 1

[0023] Please see Figures 1 to 4 This utility model provides a water-saving irrigation system for municipal green belts. Its overall structure mainly includes a water supply unit 1, an irrigation unit 2, and a control unit 3. The water supply unit 1 serves as the water source introduction and initial distribution structure for the entire system, responsible for delivering municipal water to the green belt area. The irrigation unit 2 is the core component for achieving precise water supply to the plants within the green belt, maintaining normal plant growth by directly supplying water to the plant roots or leaves. The control unit 3 is responsible for intelligent management, status monitoring, and water volume regulation of the entire irrigation process, ensuring the rational use of water resources.

[0024] Specifically, the water supply unit 1 adopts a pipe network structure, and its overall external dimensions are usually designed according to the actual area and length of the green belt, for example, a municipal green belt covering an area of ​​1,000 to 5,000 square meters. The water supply unit 1 consists of a main pipe 4 and a distribution box 5. The inlet end of the water supply unit 1 is equipped with a flange or threaded interface for connecting to the municipal water supply network (not shown, usually a municipal main line with a diameter greater than 300 mm), and its outlet end is connected to the branch pipe (not shown) of the irrigation unit 2 through a special pipe fitting (not shown).

[0025] The main pipeline 4 is made of high-strength, corrosion-resistant polyethylene material. Its main body is high-density polyethylene (HDPE) or ultra-high molecular weight polyethylene (UHMWPE) pipe, with an outer diameter typically ranging from 50 mm to 300 mm and a wall thickness of approximately 5 mm to 20 mm. The main pipeline 4 is laid using hot-melt butt welding or electrofusion sleeve connections to ensure reliable sealing at the joints and to withstand municipal water supply pressure, typically 0.4 MPa to 1.0 MPa. The main pipeline 4 is laid along the edge of the green belt or along the main road below it. Its surface is typically coated with an anti-UV and anti-aging coating to extend its service life, or buried 0.5 to 1.5 meters below the soil to prevent freezing and external damage. As the main channel for transporting municipal water to the green belt's water-saving irrigation system, the main pipeline 4 ensures the continuity of water flow and the stability of pressure transmission.

[0026] The diversion box 5 is made of stainless steel or high-strength engineering plastics (such as ABS or PVC-U). Its main body is a rectangular or circular box structure, with dimensions of approximately 300 mm x 200 mm x 150 mm to 800 mm x 500 mm x 400 mm. The diversion box 5 has multiple outlets inside, each equipped with an electric or manual ball valve (not shown, typically made of stainless steel or brass, with an interface diameter of DN25 to DN100) for controlling water flow. The diversion box 5 is securely fixed to the side wall of the main pipe 4 via a standard flange connection (e.g., PN10 or PN16 flanges, made of stainless steel or cast iron, with a thickness of approximately 10 mm to 20 mm). The flanges are secured by several M10 or M12 bolts passing through pre-drilled holes in the main pipe 4 and the flange holes in the diversion box 5, and are tightened using sealing gaskets (not shown, typically made of EPDM or NBR rubber) and lock nuts (not shown) to ensure a reliable and pressure-resistant seal at the connection. The inlet of the diversion box 5 is connected to the main pipe 4 via a special connector (not shown). The purpose of the diversion box 5 is to initially divide or branch the water flow in the main pipe 4, and control the water flow into different branch pipes (not shown) through internal valves (not shown), thereby achieving rough regulation of the water volume in different irrigation areas.

[0027] The irrigation unit 2 is installed inside the green belt via branch pipes (not shown, made of polyethylene or PVC-U material, with an outer diameter of approximately 20 to 50 millimeters and a wall thickness of approximately 2 to 5 millimeters). The branch pipes extend from the outlet of the distribution box 5 and are laid along the irrigation area within the green belt, typically buried 0.2 to 0.5 meters below the soil surface to protect the pipes and reduce evaporation. The irrigation unit 2 is the core system for achieving precise water supply to the plants within the green belt, and it includes a drip irrigation tape 6, several sprinkler heads 7, and several soil moisture sensors 8.

[0028] The drip irrigation tape 6 is made of high-strength polyethylene (PE) or polyvinyl chloride (PVC) material. Its main body is a flat or cylindrical flexible tube structure, with an outer diameter typically ranging from 16 mm to 20 mm and a wall thickness of approximately 0.2 mm to 0.8 mm. The drip irrigation tape 6 is arranged near the roots of plants within the green belt, usually buried 5 cm to 20 cm below the soil surface, or laid directly between plant rows to directly act on the plant roots. Several built-in drippers or drip holes are evenly distributed on the pipe wall of the drip irrigation tape 6, with a dripper spacing typically between 20 cm and 50 cm and a dripper flow rate of 1.0 liters per hour to 4.0 liters per hour to achieve precise drip irrigation. The drip irrigation tape 6 is connected to the end of the branch pipe (not shown) via a quick connector (made of engineering plastic or stainless steel, with a water-stopping function and anti-detachment buckle) to ensure a quick, reliable, and leak-free connection, facilitating installation and maintenance. The drip irrigation tape 6 is designed to deliver water directly to the soil around the plant roots via low-pressure, slow dripping, minimizing water evaporation and runoff loss and improving water resource utilization efficiency.

[0029] The sprinkler head 7 is made of engineering plastics (such as ABS or POM) or stainless steel. Its main body is a pop-up or fixed micro-sprinkler structure, with a spray radius typically ranging from 1.5 meters to 3.0 meters and a spray flow rate of 50 liters per hour to 200 liters per hour. The sprinkler head 7 is threaded onto the surface of the drip irrigation tape 6, usually secured by pre-drilling holes in the drip irrigation tape 6 and installing rubber gaskets (not shown) to ensure a reliable seal at the connection, or by connecting to the drip irrigation tape 6 via a dedicated tee connector (not shown). The nozzles of the sprinkler head 7 are typically replaceable to adapt to different spray angles and flow rate requirements. The sprinkler heads 7 are typically spaced two to five meters apart, with a spray height typically ranging from 0.1 to 0.5 meters above ground level to ensure coverage and reduce the impact of wind. The purpose of the sprinkler head 7 is to provide supplementary spray irrigation when plants require rapid watering or leaf cleaning, compensating for the shortcomings of drip irrigation, ensuring plants receive comprehensive water, and adapting to different irrigation scenarios.

[0030] The soil moisture sensor 8 employs a capacitive, resistive, or time-domain reflectometry (TDR) sensor, measuring soil moisture content from 0% to 100%, with an accuracy of ±3%, and exhibits good long-term stability and anti-interference capabilities. The soil moisture sensor 8 is typically encapsulated in a stainless steel or high-strength engineering plastic housing, with a length of approximately 10-20 cm and a diameter of approximately 2-4 cm. The soil moisture sensor 8 is installed by vertically or obliquely inserting its probe into the active root zone of the plant roots within the greenbelt soil, typically at a depth of 10-30 cm, to obtain soil moisture information for the area where the plants actually require water. The soil moisture sensor 8 is connected to the control unit 3 via a corrosion-resistant, waterproof enclosure and shielded signal cable, which is typically protected by a waterproof connector (not shown) and a protective sleeve (not shown). The function of the soil moisture sensor 8 is to monitor the soil moisture content of the greenbelt in real time, providing accurate soil moisture information to the control unit 3, thereby enabling precise irrigation based on the actual water requirements of the plants.

[0031] The control unit 3 is fixed to the side of the water supply unit 1, typically secured to the exterior of the distribution box 5 via a dedicated stainless steel bracket (not shown), and positioned for easy observation and maintenance by the operator. The control unit 3 is the intelligent control core of the entire municipal greenbelt water-saving irrigation system. Its overall dimensions are typically approximately 150-250 mm in length, 100-150 mm in width, and 50-80 mm in height. The outer casing of the control unit 3 is made of waterproof and corrosion-resistant engineering plastics (e.g., PC / ABS alloy) or stainless steel, with a good protection rating (e.g., IP65 or IP66) to withstand harsh outdoor environments. The control unit 3 includes a flow detection module 9, a signal processor 10, and a valve controller 11.

[0032] The flow detection module 9 employs a high-precision electromagnetic flow sensor, ultrasonic flow sensor, or turbine flow sensor, with a measurement range typically ranging from 0.1 cubic meters per hour to 5 cubic meters per hour and a measurement accuracy of ±0.5%. The flow detection module 9 is soldered to the circuit board of the control unit 3 via SMT (Surface Mount Technology) and connected to the branch pipe (not shown) through a corrosion-resistant probe (not shown) or a pressure-conducting tube (not shown) to monitor the liquid flow through the branch pipe (not shown) in real time and convert it into an analog or digital electrical signal. The flow detection module 9 is typically installed in the straight section of the branch pipe to ensure measurement accuracy.

[0033] The signal processor 10 employs a high-performance, low-power embedded microcontroller (e.g., an ARM Cortex-M series processor) with a main frequency of 200 MHz to 400 MHz, possessing powerful real-time data processing capabilities and rich communication interfaces (e.g., RS485, Modbus, LoRa). The signal processor 10 is integrated within the control unit 3, implemented through multi-layer PCB board soldering, and typically includes a real-time clock module (not shown) and non-volatile memory (not shown). The signal processor 10 receives soil moisture content data from the soil moisture sensor 8 and flow data from the flow detection module 9, executes complex control algorithms (e.g., PID control, fuzzy logic control, or expert systems), collaboratively analyzes irrigation demand, determines the current soil moisture status, the difference between the actual water supply and the plant's water requirement, and the required adjustment amount of the valve controller 11.

[0034] The valve controller 11 employs a multi-channel electric valve actuator or a pneumatic solenoid valve actuator, with a rated output power of approximately five to twenty watts and a rated voltage of 24 volts DC or 12 volts DC. The valve controller 11 is connected to the irrigation unit 2 (particularly the electric valve integrated on the branch pipe, or the electric valve inside the distribution box 5, not shown) via a high-strength shielded circuit. The valve controller 11 receives adjustment commands from the signal processor 10 and precisely controls the valve actions on the branch pipe (not shown) or inside the distribution box 5 (not shown), achieving dynamic adjustment of the water supply pipeline's on / off state and water volume. The valve controller 11 typically has a manual / automatic switching function for convenient on-site operation.

[0035] During equipment operation, the soil moisture sensor 8 monitors the soil moisture content of the green belt in real time and transmits the collected analog or digital data to the signal processor 10. The flow detection module 9 monitors the actual water supply through the branch pipe (not shown) in real time and feeds the data back to the signal processor 10. The flow detection module 9 and the signal processor 10 work together to analyze the soil moisture content and actual water supply flow data. For example, the signal processor 10 assesses the current irrigation demand based on whether the soil moisture content detected by the soil moisture sensor 8 is lower than a preset threshold (e.g., 30%) and whether the actual water supply fed back by the flow detection module 9 reaches the target value. The valve controller 11 dynamically adjusts the water supply parameters based on the analysis results of the signal processor 10. For example, when the soil moisture content is detected to be too low, the valve controller 11 will instruct the corresponding branch pipe (not shown) valve to open, increasing the water supply to improve the soil moisture content; when the set moisture content is reached (e.g., 60%) or rainfall is detected (via an external meteorological sensor, not shown, whose signal is connected to the signal processor 10), the valve will be closed to stop irrigation and conserve water resources. The entire structural design aims to achieve precise and water-saving irrigation of green belts by real-time monitoring of soil moisture and precise control of water supply flow, based on the actual water requirements of plants, thereby minimizing water waste and insufficient irrigation and optimizing the growth environment of plants in green belts.

[0036] Example 2

[0037] In another embodiment of this utility model, the drip irrigation tape 6 is provided with a zoned irrigation structure to achieve differentiated water supply for different plants and improve water resource utilization efficiency. Its structure is basically the same as in Embodiment 1, and will not be described again here. Specifically, the zoned irrigation structure includes a main irrigation zone 12 and several auxiliary irrigation zones 13. Please refer to... Figure 2The main irrigation zone 12 is made of high-strength polyethylene (PE) material, with a porous drip irrigation tape structure. Its outer diameter is typically 16 to 20 millimeters, and its wall thickness is approximately 0.3 to 0.8 millimeters. The main irrigation zone 12 has densely distributed built-in drippers or drip holes evenly distributed on its pipe wall, with a dripper spacing of typically 20 to 30 centimeters and a dripper flow rate of 1.0 to 2.0 liters per hour. The main irrigation zone 12 is arranged near the root systems of the main vegetation (e.g., trees, large shrubs) within the green belt, typically buried 10 to 20 centimeters below the soil to meet their higher basic water requirements. The main irrigation zone 12 is designed to provide continuous and stable basic drip irrigation water to the main vegetation. The auxiliary irrigation zone 13 is also made of high-strength polyethylene (PE) material, with a drip irrigation tape structure. Its outer diameter is typically 12 to 16 millimeters, and its wall thickness is approximately 0.2 to 0.5 millimeters. The auxiliary irrigation zone 13 has relatively sparsely distributed built-in drippers or drip holes on its pipe wall, with a dripper spacing of typically 40 to 60 centimeters and a dripper flow rate of 0.5 to 1.0 liters per hour. The auxiliary irrigation zone 13 is connected to the side of the main irrigation zone 12 via several connecting pipes (made of polyethylene material, with a diameter of approximately 8 to 12 millimeters and a length of approximately 50 to 1 meter), evenly distributed in a branching pattern. These connecting pipes are connected to the main irrigation zone 12 via drip irrigation tees or bypass connectors (not shown, typically made of engineering plastic) and can be independently controlled. The auxiliary irrigation zone 13 is arranged along secondary vegetation (e.g., ground cover plants, lawn edges) or specific water-demanding areas within the green belt. The purpose of this zoned irrigation structure is to enable the drip irrigation belt 6 to achieve differentiated water resource allocation based on the water requirements of different plant types within the green belt (e.g., trees with high water requirements, ground cover plants with low water requirements). By independently or in conjunction with the dripper flow rate, density, and water supply time of the main irrigation zone 12 and the auxiliary irrigation zone 13 (via valve controller 11, not shown), it can meet the precise water needs of different areas, avoiding over-irrigation or under-irrigation, thereby achieving precision irrigation. This structure significantly improves water resource utilization efficiency, effectively solves the problems of low water resource utilization and difficulty in adapting to plant water requirements in traditional irrigation systems, and optimizes the growth environment of vegetation in green belts.

[0038] Example 3

[0039] In another embodiment of this utility model, the spray head 7 is provided with an adjustable nozzle to adapt to different spraying needs and provide optimal water mist coverage. Its structure is basically the same as in Embodiment 1, and will not be described again here. Specifically, the adjustable nozzle includes a nozzle core 14 and a guide vane 15. Please refer to... Figure 2The nozzle core 14 is made of high-strength engineering plastic (e.g., POM, nylon) or stainless steel. Its main body is a hollow cylindrical or conical structure with a diameter of approximately 5 to 10 millimeters and a length of approximately 10 to 20 millimeters. The nozzle core 14 has precise flow channels and spray holes inside, with the hole diameter and flow channel shape precisely designed according to the spray atomization effect and flow characteristics. The nozzle core 14 is fixed inside the body of the spray head 7 (not shown, usually an engineering plastic or stainless steel shell) by threaded connection or snap-fit, with its outlet facing the spray direction. The function of the nozzle core 14 is to accelerate and shape the water flow, forming a primary jet stream. The guide vane 15 is made of high-strength engineering plastic (e.g., POM) or stainless steel. Its main body is fan-shaped or spiral blade-shaped, with dimensions of approximately 5 mm x 10 mm to 10 mm x 20 mm and a thickness of approximately 1 mm to 3 mm. The guide vane 15 is mounted on the outside (or inside) of the nozzle core 14 via a precision rotating shaft (made of stainless steel, with a diameter of approximately one to two millimeters), allowing the guide vane 15 to rotate or oscillate approximately zero to ninety degrees within the nozzle. The rotating shaft is typically connected to an external adjustment mechanism (e.g., a manual knob or a micro-electric actuator, not shown, driven by threads or gears) to achieve precise angle control. The guide vane 15 is designed to reshape and scatter the jet stream after it leaves the nozzle core 14, thereby altering the spray pattern, coverage area, and atomization level. Driven by the external adjustment mechanism, the rotation of the guide vane 15 precisely changes the interaction angle between the nozzle and the jet stream. This structure allows the spray head 7 to steplessly adjust the spray pattern (e.g., fan-shaped spray, circular spray), spray coverage area (e.g., radius of 1.5 to 3.0 meters), and water mist atomization level (e.g., coarse mist, fine mist), with an adjustment accuracy of five to ten degrees. The structure significantly improves the adaptability of the sprinkler head 7 to different spraying needs, effectively solving the problems of the traditional sprinkler head's single spraying mode and fixed coverage. Thus, when providing auxiliary spraying irrigation, it can provide the best water mist coverage according to plant type, soil permeability, or wind conditions, minimizing water waste and leaf damage.

[0040] Example 4

[0041] In another embodiment of this utility model, the water supply unit 1 is equipped with a pressure stabilizing structure to maintain a constant system pressure and ensure irrigation uniformity. Its structure is basically the same as in Embodiment 1, and will not be described again here. Specifically, the pressure stabilizing structure includes a pressure stabilizing tank 16, a pressure reducing valve 17, and a pressure gauge 18. Please refer to... Figure 3The pressure stabilizing tank 16 is made of stainless steel (e.g., SUS304 or SUS316L), and its main body is a cylindrical or spherical sealed container structure with a volume of approximately 20 to 100 liters and a design pressure of 1.6 MPa to 2.5 MPa. The pressure stabilizing tank 16 typically has a rubber diaphragm or air bladder (not shown, usually made of butyl rubber or EPDM) inside, dividing the tank into a water chamber and an air chamber. The air chamber is pre-filled with nitrogen or compressed air, with a pre-filling pressure typically between 0.2 MPa and 0.4 MPa. The pressure stabilizing tank 16 is firmly welded to the middle of the main pipeline 4, usually connected by a short pipe (made of stainless steel, with a diameter matching the main pipeline 4), and equipped with a shut-off valve (not shown) for easy maintenance. The function of the pressure stabilizing tank 16 is to absorb the instantaneous water hammer effect generated when the water pump starts or the valve closes, buffer water pressure fluctuations, and ensure that the pressure in the main pipeline 4 remains relatively stable. The pressure reducing valve 17 is made of stainless steel or brass, with a valve-like structure. Its connection diameter matches the main pipeline 4, typically DN50 to DN150. The rated working pressure is 0.6 MPa to 1.6 MPa, and the pressure reduction range is 0.2 MPa to 0.6 MPa. The pressure reducing valve 17 is located at the outlet of the pressure stabilizing tank 16 (downstream of the main pipeline 4, near the distribution box 5), and its installation direction is usually consistent with the water flow direction. The function of the pressure reducing valve 17 is to stably reduce the high and fluctuating municipal water supply pressure from the pressure stabilizing tank 16 to the safe working pressure required by the irrigation system (e.g., 0.2 MPa to 0.4 MPa) and maintain it constant, preventing damage to the drip irrigation tape 6 and sprinkler heads 7 due to high-pressure impacts or pressure instability. The pressure gauge 18 uses a stainless steel housing and is a high-precision Bourdon tube or diaphragm pressure gauge. Its measuring range is typically 0 MPa to 1.6 MPa, and its measuring accuracy is 0.5 percent. The pressure gauge 18 is installed on the side of the pressure reducing valve 17 via a threaded connection (e.g., M20 x 1.5 thread). It is typically connected to the outlet pressure chamber of the pressure reducing valve 17 via a dedicated connector (not shown), with its dial facing an easily observable direction for the operator. The pressure gauge 18 is designed to display the actual water pressure at the outlet of the pressure reducing valve 17 in real time, providing the operator with intuitive pressure information and serving as an indication of abnormal system pressure. The pressure stabilization structure absorbs pressure fluctuations through the pressure stabilizing tank 16, stabilizes the output pressure through the pressure reducing valve 17, and monitors the pressure in real time through the pressure gauge 18. This structure maintains a constant water supply pressure within the entire irrigation system at a preset value, effectively addressing the impact of municipal water supply pressure fluctuations on the stability and uniformity of the irrigation system. This structure ensures uniform water output from the drip irrigation tape 6 and sprinkler heads 7 under stable pressure, thereby improving irrigation uniformity and water resource utilization efficiency.

[0042] Example 5

[0043] In another embodiment of this utility model, the control unit 3 is equipped with an adaptive irrigation system for automatically adjusting irrigation parameters according to environmental changes to achieve precise water volume control. Its structure is basically the same as in Embodiment 1, and will not be described again here. Specifically, the adaptive irrigation system includes a data acquisition unit 19, an analysis calculator 20, and an irrigation regulator 21. Please refer to... Figure 2The data acquisition unit 19 employs a high-performance multi-channel analog-to-digital converter (ADC) module and a real-time clock (RTC), with a sampling rate of 100 to 1000 times per second and a resolution of 16 to 24 bits. The data acquisition unit 19 is connected to the soil moisture sensor 8, the flow detection module 9, and other possible environmental sensors (e.g., air temperature sensor, light sensor, wind speed sensor, and rainfall sensor from a weather station, not shown) via shielded signal lines to collect multi-dimensional environmental data and irrigation status data in real time. The data acquisition unit 19 digitizes the collected data, adds a timestamp, and transmits it to the analysis calculator 20. The analysis calculator 20 is integrated within the signal processor 10 and is implemented using a high-performance embedded processor and complex adaptive control algorithms (e.g., based on plant water requirement models, fuzzy PID control, expert systems, or machine learning algorithms). The analysis calculator 20 receives real-time and historical data from the data acquisition unit 19, and combines this data with information on the growth stage and species of plants within the green belt, as well as climate data (e.g., evapotranspiration, rainfall, and light intensity), to calculate the real-time water demand of the plants and the required adjustment of irrigation parameters. It also predicts the trend of irrigation demand changes over a future period, with a prediction cycle of 24 to 72 hours. Based on these analysis and prediction results, the analysis calculator 20 dynamically adjusts the optimal irrigation volume, irrigation time, and irrigation area. The irrigation regulator 21 uses a high-precision electric or pneumatic actuator with a rated thrust or torque of approximately 10 to 50 Newton-meters and a stroke or rotation angle of approximately 90 to 180 degrees. The irrigation regulator 21 is connected to the irrigation unit 2 (particularly the electric valves on the branch pipes or the electric valves inside the distribution box 5) via an electrical line (if it is an electric actuator) or an air supply line (if it is a pneumatic actuator). The irrigation regulator 21 receives irrigation parameter adjustment commands from the analysis calculator 20 and precisely controls valve actions to achieve real-time and continuous adjustment of the water supply to the drip irrigation tape 6 and sprinkler heads 7. The adaptive irrigation system is configured to collect multi-dimensional data via the data acquisition unit 19 connected to various sensors, perform intelligent analysis and prediction via the analysis calculator 20, and precisely adjust irrigation parameters via the irrigation regulator 21. This structure enables the municipal greenbelt water-saving irrigation system to automatically and continuously adjust the irrigation volume and mode according to the actual water requirements of the plants and dynamic changes in the environment, achieving precise water control and avoiding over-irrigation and under-irrigation. This structure significantly improves water resource utilization and plant growth quality, effectively solving the problem of traditional irrigation systems lacking a precise water control mechanism.

[0044] Example 6

[0045] In another embodiment of this utility model, the irrigation unit 2 is provided with an anti-clogging structure to prevent the accumulation of impurities and ensure stable system operation. Its structure is basically the same as in Embodiment 1, and will not be described again here. Specifically, the anti-clogging structure includes a filter screen 22, a backwash valve 23, and a drain outlet 24. Please refer to... Figure 2 The filter screen 22 is made of stainless steel woven mesh (e.g., SUS304 or SUS316L) or high-strength engineering plastic filter element, with a mesh size typically ranging from 100 to 200 mesh (i.e., 0.07 mm to 0.15 mm) and a thickness of approximately 1 to 3 mm. The filter screen 22 is embedded in the inlet of the drip irrigation tape 6 (i.e., the connection point with the branch pipe) via a detachable frame or threaded interface, covering the entire inlet cross-section for easy periodic inspection and cleaning. The filter screen 22 intercepts solid impurities such as silt, algae, and organic debris that may be present in the water before it enters the drip irrigation tape 6, preventing them from entering the drippers or sprinkler heads 7 inside the drip irrigation tape 6 and thus avoiding clogging. The backwash valve 23 is an electric ball valve or solenoid valve, with an interface diameter typically ranging from 20 to 50 mm and a rated working pressure of 0.4 MPa to 1.0 MPa. The backwash valve 23 is located at the end of the branch pipe (not shown), and its installation direction is typically perpendicular to the branch pipe axis. The drive mechanism (not shown) of the backwash valve 23 is connected to the control unit 3 (not shown) via an electrical line, allowing for remote control of its opening and closing. The backwash valve 23 is designed to open quickly upon receiving a command from the control unit 3 (not shown), allowing water to flow from the end of the branch pipe and carry away impurities accumulated on the surface of the filter screen 22 or inside the branch pipe through reverse flow. The drain outlet 24 is made of stainless steel or engineering plastic, with a short tubular body and a diameter typically between 20 and 50 millimeters. The drain outlet 24 is connected to the bottom of the backwash valve 23 via a threaded connection or welding, typically extending downwards to guide the backwashed wastewater to the municipal drainage system (not shown) or a dedicated collection tank (not shown). The outlet of the drain outlet 24 is usually equipped with a protective cover. The anti-clogging structure serves to initially intercept impurities through the filter screen 22 and periodically remove impurities through the backwash valve 23 and the drain outlet 24, thus forming a complete anti-clogging mechanism. The structure can prevent impurities in the water from accumulating inside the irrigation unit 2 from multiple levels, thereby ensuring the unobstructed flow of the drip irrigation tape 6 and the sprinkler head 7. It effectively solves the problem of blockage that easily occurs in traditional irrigation systems during long-term operation, and ensures the stable operation and uniformity of irrigation.

[0046] Example 7

[0047] In another embodiment of this utility model, the water supply unit 1 is provided with a quick-maintenance structure to facilitate system inspection and component replacement, reducing the difficulty of operation and maintenance. Its structure is basically the same as in Embodiment 1, and will not be described again here. Specifically, the quick-maintenance structure includes a maintenance well 25, an observation window 26, and a test interface 27. Please refer to... Figure 1 The inspection well 25 is made of reinforced concrete or high-strength engineering plastic. Its main body is a square or circular well structure, with dimensions of approximately 800 mm x 800 mm x 1 m to 1.2 m x 1.2 m x 1.5 m. The inspection well 25 is located above the main pipeline 4, typically near the distribution box 5, by tightly fitting its walls into the soil surrounding the main pipeline 4, facilitating inspection and maintenance of the distribution box 5. The inspection well 25 is usually equipped with a cast iron or composite material cover (not shown), flush with the ground and with anti-theft features. The observation window 26 is made of high-strength tempered glass or polycarbonate sheet, with a diameter of approximately 100 mm to 200 mm and a thickness of approximately 10 mm to 20 mm. The observation window 26 is fitted into the center of the cover plate (not shown) of the inspection well 25 by threaded clamping or snap-fitting, and is equipped with an EPDM or silicone rubber sealing gasket. The exterior of the observation window 26 is usually equipped with a protective cover (not shown) to prevent impact and abrasion. The observation window 26 allows operators to observe the valve status of the diversion box 5, the connection status of the main pipeline 4, and any abnormal leaks or blockages without opening the manhole cover, enabling non-invasive inspection. The test interface 27 uses an industrial-grade waterproof connector (e.g., M12 or M8 connector) or a USB Type-C interface, and its main body is made of high-strength brass or stainless steel. The test interface 27 is embedded in the side of the control unit 3 and is equipped with a waterproof and dustproof cover. The test interface 27 is connected to the signal processor 10 (not shown) via an internal communication bus (e.g., UART, SPI, or CAN bus). The test interface 27 is used to connect to external diagnostic equipment (e.g., a handheld programmer or a host computer) to perform functional testing, parameter configuration, firmware upgrades, and data reading of the irrigation system. The quick-maintenance structure provides access for personnel and tools through the inspection well 25, enables non-invasive observation through the observation window 26, and provides convenient testing methods through the test interface 27. The structure greatly simplifies the inspection and maintenance process of municipal green belt water-saving irrigation systems, shortens operation and maintenance time, reduces on-site operation and maintenance difficulty and labor costs, and improves equipment availability and operational reliability.

[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A water-saving irrigation system for municipal greenbelts, comprising: The water supply unit (1), irrigation unit (2), and control unit (3) are provided. The irrigation unit (2) is installed inside the green belt via a branch pipe. The control unit (3) is fixed to the side of the water supply unit (1). The water supply unit (1) adopts a pipe network structure, which includes a main pipe (4) and a distribution box (5). The main pipe (4) is made of polyethylene material. The distribution box (5) is fixed to the side wall of the main pipe (4) via a flange connection. The irrigation unit (2) includes a drip irrigation tape (6), a sprinkler head (7), and a soil moisture sensor (8). The drip irrigation tape (6) is connected to the end of the branch pipe via a quick connector. The sprinkler head (7) is threaded onto the surface of the drip irrigation tape (6). The soil moisture sensor (8) is embedded in the ground. Located inside the soil of the green belt; the control unit (3) includes a flow detection module (9), a signal processor (10), and a valve controller (11); the flow detection module (9) is soldered to the circuit board of the control unit (3); the signal processor (10) is integrated inside the control unit (3); the valve controller (11) is connected to the irrigation unit (2) via a line; the drip irrigation tape (6) is provided with a zoned irrigation structure; the zoned irrigation structure includes a main irrigation zone (12) and an auxiliary irrigation zone (13); the main irrigation zone (12) uses a porous drip irrigation tape; the auxiliary irrigation zone (13) is connected to the periphery of the main irrigation zone (12) via a connecting pipe; the sprinkler head (7) is provided with an adjustable nozzle; the adjustable nozzle includes a nozzle core. (14) and guide vane (15); the nozzle core (14) is made of engineering plastic; the guide vane (15) is installed inside the nozzle via a rotating shaft; the water supply unit (1) is provided with a pressure stabilizing structure; the pressure stabilizing structure includes a pressure stabilizing tank (16), a pressure reducing valve (17) and a pressure gauge (18); the pressure stabilizing tank (16) is welded to the middle of the main pipeline (4); the pressure reducing valve (17) is located at the outlet of the pressure stabilizing tank (16); the pressure gauge (18) is installed on the side of the pressure reducing valve (17); the control unit (3) is provided with an adaptive irrigation system; the adaptive irrigation system includes a data acquisition unit (19), an analysis calculator (20) and an irrigation regulator (21); the data acquisition unit (19) is connected to each Sensors; the analysis calculator (20) is integrated into the signal processor (10); the irrigation regulator (21) is connected to the irrigation unit (2) via an electric actuator; the irrigation unit (2) is provided with an anti-clogging structure; the anti-clogging structure includes a filter screen (22), a backwash valve (23), and a drain outlet (24); the filter screen (22) is embedded in the inlet of the drip irrigation tape (6); the backwash valve (23) is located at the end of the branch pipe; the drain outlet (24) is connected to the bottom of the backwash valve (23); the water supply unit (1) is provided with a quick maintenance structure; the quick maintenance structure includes a maintenance well (25), an observation window (26), and a test interface (27); the maintenance well (25) is located on the ground above the main pipeline (4);The observation window (26) is embedded in the cover plate of the inspection well (25); the test interface (27) is located on the side of the control unit (3).

2. The municipal green belt water-saving irrigation system according to claim 1, characterized in that, In the zoned irrigation structure of the drip irrigation tape (6), the outer diameter of the main irrigation zone (12) is 16 mm to 20 mm, the wall thickness is 0.3 mm to 0.8 mm, the dripper spacing is 20 cm to 30 cm, and the dripper flow rate is 1.0 liters per hour to 2.0 liters per hour; the outer diameter of the auxiliary irrigation zone (13) is 12 mm to 16 mm, the wall thickness is 0.2 mm to 0.5 mm, the dripper spacing is 40 cm to 60 cm, and the dripper flow rate is 0.5 liters per hour to 1.0 liters per hour; the connecting pipe is made of polyethylene material, with a diameter of 8 mm to 12 mm and a length of 50 cm to 1 meter; the main irrigation zone (12) and the auxiliary irrigation zone (13) are connected by the connecting pipe.

3. The water-saving irrigation system for municipal green belts according to claim 1, characterized in that, In the adjustable nozzle of the spray head (7), the diameter of the nozzle core (14) is five to ten millimeters, and the length is ten to twenty millimeters; the size of the guide plate (15) is five millimeters by ten millimeters to ten millimeters by twenty millimeters, and the thickness is one millimeter to three millimeters; the guide plate (15) is installed outside or inside the nozzle core (14) through a precision rotating shaft, and its rotation angle is zero to ninety degrees; the adjustable nozzle changes the spraying mode, coverage area and atomization degree by rotating the guide plate (15).

4. The water-saving irrigation system for municipal green belts according to claim 1, characterized in that, In the pressure stabilization structure of the water supply unit (1), the pressure stabilizing tank (16) is made of stainless steel, with a volume of 20 to 100 liters and a design pressure of 1.6 MPa to 2.5 MPa; the pressure reducing valve (17) is made of stainless steel or brass, with a connection diameter of 50 to 150 mm and a pressure reduction range of 0.2 MPa to 0.6 MPa; the pressure gauge (18) has a stainless steel housing, a measurement range of 0 MPa to 1.6 MPa, and a measurement accuracy of 0.5 percent; the pressure stabilizing tank (16) is welded to the middle of the main pipeline (4), the pressure reducing valve (17) is located at the outlet of the pressure stabilizing tank (16), and the pressure gauge (18) is installed on the side of the pressure reducing valve (17).

5. A water-saving irrigation system for municipal green belts according to claim 1, characterized in that, In the adaptive irrigation system of the control unit (3), the data acquisition unit (19) is a multi-channel analog-to-digital converter module with a sampling rate of 100 to 1000 times per second; the analysis calculator (20) is integrated into the signal processor (10) through an adaptive control algorithm; the irrigation regulator (21) is a high-precision electric actuator or pneumatic actuator with a rated thrust or torque of 10 to 50 Newton-meters and a stroke or rotation angle of 90 to 180 degrees; the data acquisition unit (19) is connected to the soil moisture sensor (8) and the flow detection module (9), and the irrigation regulator (21) is connected to the irrigation unit (2) through the electric actuator.

6. A water-saving irrigation system for municipal green belts according to claim 1, characterized in that, In the anti-clogging structure of the irrigation unit (2), the filter screen (22) is made of stainless steel woven mesh or high-strength engineering plastic filter element, with a mesh size of 100 to 200 mesh and a thickness of 1 to 3 millimeters; the backwash valve (23) is an electric ball valve or solenoid valve, with an interface diameter of 20 to 50 millimeters and a rated working pressure of 0.4 MPa to 1.0 MPa; the drain outlet (24) is made of stainless steel or engineering plastic, with a diameter of 20 to 50 millimeters; the filter screen (22) is embedded in the inlet of the drip irrigation tape (6), the backwash valve (23) is set at the end of the branch pipe, and the drain outlet (24) is connected to the bottom of the backwash valve (23).

7. A water-saving irrigation system for municipal green belts according to claim 1, characterized in that, In the quick maintenance structure of the water supply unit (1), the inspection well (25) is made of reinforced concrete or high-strength engineering plastic, and its length, width and height are 800 mm x 800 mm x 1 m to 1.2 m x 1.2 m x 1.5 m; the observation window (26) is made of high-strength tempered glass or polycarbonate board, with a diameter of 1 m to 200 mm and a thickness of 10 mm to 20 mm; the test interface (27) adopts an industrial-grade waterproof connector or a USB Type-C interface; the inspection well (25) is opened on the ground above the main pipeline (4) and located near the diversion box (5), the observation window (26) is embedded in the center of the cover plate of the inspection well (25), and the test interface (27) is connected to the signal processor (10) through the internal communication bus.

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