Intelligent drip irrigation system for highway median strip

Abstract

The utility model discloses a highway central median strip intelligent drip irrigation system belongs to road afforestation irrigation equipment technical field. The system includes constant pressure water supply pump station, drip irrigation pipe network, soil monitoring sensor component and control network, and the water supply pipeline of constant pressure water supply pump station is provided with pressure regulating valve, and the drip irrigation pipe network includes drip irrigation main pipeline, and a plurality of drip irrigation units are connected on drip irrigation main pipeline, and each irrigation unit corresponds a section of median strip drip irrigation section, and the soil state data are collected through soil monitoring sensor component, and the control network formulates irrigation strategy according to the soil state (such as humidity, temperature, PH, conductivity etc. ) that soil monitoring sensor monitored, and controls pump station and carries out accurate drip irrigation to each median strip drip irrigation section, compared with traditional manual irrigation mode, can save water 60%, and also avoid the problem that roadbed stability declines caused by irrigation not in time and excessive irrigation, is favorable to the healthy growth of median strip vegetation and guarantees the driving safety.

Description

Technical Field

[0001] This utility model belongs to the technical field of road greening irrigation equipment, specifically an intelligent drip irrigation system for the central median strip of highways. Background Technology

[0002] The central median strip, as an important component of highways, serves to ensure driving safety, reduce glare, and enhance the landscape. Traditional irrigation methods require road closures for manual operation, which cannot accurately irrigate according to soil moisture content. This leads to problems such as untimely irrigation, poor maintenance safety, and water waste. Especially in collapsible loess areas, over-irrigation can cause a decrease in roadbed stability and affect driving safety. Utility Model Content

[0003] This utility model proposes an intelligent drip irrigation system for the median strip of highways, aiming to solve the problems of traditional median strip irrigation methods that cannot accurately irrigate according to soil moisture content, resulting in untimely irrigation, poor safety of maintenance operations, and waste of water resources.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A smart drip irrigation system for the central median strip of a highway includes a constant pressure water supply pump station, a drip irrigation network, a soil monitoring sensor assembly, and a control network; The constant pressure water supply pump station includes a water storage tank, a water pump connected to the water storage tank, a water supply pipeline connected to the outlet of the water pump, and a pressure regulating valve installed on the water supply pipeline. The drip irrigation network includes a main drip irrigation pipeline, on which several drip irrigation units are connected. Each irrigation unit corresponds to a segmented drip irrigation section. Each drip irrigation unit includes a drip irrigation branch pipe, on which multiple drip irrigation heads are equidistantly arranged. A zone solenoid valve is installed between the drip irrigation branch pipe and the main drip irrigation pipeline. The soil monitoring sensor assembly includes a soil moisture sensor, and a set of soil monitoring sensor assemblies is installed on each drip irrigation section of the dividing strip. The control network includes a master PLC and multiple RTU controllers. The master PLC communicates with the multiple RTU controllers via an RS485 bus. The input and output terminals of each RTU controller are respectively connected to the soil monitoring sensor assembly of a segmented drip irrigation section and the partition solenoid valve of the drip irrigation unit. The output terminal of the master PLC is connected to the water pump and pressure regulating valve of the constant pressure pump station.

[0005] Preferably, the constant pressure pump station further includes a fertilizer adding device, which includes a fertilizer-water mixing tank disposed above the water storage tank, and a fertilizer adding port is provided on the top of the fertilizer-water mixing tank; The upper part of the fertilizer-water mixing tank is connected to the water storage tank through an inlet pipe, and a water pump is installed on the inlet pipe. The lower part of the mixing tank is connected to the water storage tank through an outlet pipe, and a fertilizer-water adding solenoid valve is installed on the outlet pipe. The fertilizer-water adding solenoid valve is electrically connected to the output terminal of the main station PLC.

[0006] Preferably, the fertilizer-water mixing tank is equipped with a stirring device, which includes a stirring rod rotatably installed inside the fertilizer-water mixing tank. The top of the stirring rod extends out of the top wall of the fertilizer-water mixing tank and is connected to a motor.

[0007] Preferably, the water supply pipeline is equipped with a maintenance diversion pipe, the maintenance diversion pipe is equipped with a normally closed maintenance valve, and the pressure regulating valve is equipped with normally open maintenance valves on both sides. The two normally open maintenance valves are located within the connection points between the water supply pipeline and the maintenance diversion pipe.

[0008] Preferably, the soil monitoring sensor assembly further includes a soil temperature sensor, a soil pH sensor, and a soil conductivity sensor, wherein the soil temperature sensor, soil pH sensor, and soil conductivity sensor are connected to the input terminal of the RTU controller of the drip irrigation section of the dividing strip where they are located.

[0009] Preferably, a pressure control valve is provided on the drip irrigation branch pipe, and the pressure control valve is electrically connected to the output terminal of the RTU controller of the drip irrigation section where it is located. The pressure control valve is located on the drip irrigation branch pipe between the partition solenoid valve and the drip irrigation head.

[0010] Beneficial effects: Compared with the prior art, the present invention can achieve at least the following technical effects: 1. This utility model collects soil condition data through soil monitoring sensor components. The control network formulates irrigation strategies based on the soil conditions (such as humidity, temperature, pH, conductivity, etc.) monitored by the soil monitoring sensors, and controls the pump station to carry out precise drip irrigation to each median strip drip irrigation section. Compared with the traditional manual irrigation method, it can save 60% of water, and also avoids the problems of untimely irrigation and over-irrigation causing a decline in roadbed stability. It is conducive to the healthy growth of median strip vegetation and ensures driving safety.

[0011] 2. The constant pressure pump station of this utility model is equipped with a fertilizer addition device. While drip irrigation is in progress, fertilizer can be added reasonably according to the soil condition monitored by the soil monitoring sensor, which is more conducive to the healthy growth of vegetation in the median strip.

[0012] 3. This utility model provides a feasible basis for the digitalization and intelligentization of highway median irrigation by combining a master PLC with multiple RTU controllers to form a remote control network. Attached Figure Description

[0013] Figure 1This is a diagram of the overall system architecture of this utility model.

[0014] Figure 2 This is a schematic diagram of the constant pressure pump station of this utility model.

[0015] Figure 3 This is a schematic diagram of the drip irrigation network of this utility model.

[0016] Figure 4 This is a schematic diagram of the control network of this utility model.

[0017] In the diagram: 1. Constant pressure pump station; 2. Drip irrigation network; 3. Soil monitoring sensor assembly; 4. Main station PLC; 5. RTU controller; 6. Host computer.

[0018] 101. Water storage tank; 102. Water pump; 103. Water supply pipe; 104. Maintenance diversion pipe; 105. Pressure regulating valve; 106. Normally open maintenance valve; 107. Fertilizer-water mixing tank; 108. Fertilizer addition port; 109. Stirring rod; 110. Water outlet pipe; 111. Fertilizer-water addition solenoid valve; 112. Water inlet pipe; 113. Water pump; 114. Motor; 115. Normally closed maintenance valve; 201. Drip irrigation main pipeline; 202. Drip irrigation unit; 2021. Drip irrigation branch pipe; 2022. Drip irrigation head; 2023. Pressure control valve; 2024. Zone solenoid valve; 301. Soil moisture sensor; 302. Soil temperature sensor; 303. Soil pH sensor; 304. Soil conductivity sensor. Detailed Implementation

[0019] The present invention will be further explained below with reference to specific implementation examples.

[0020] Please see Figure 1-4 This utility model proposes an intelligent drip irrigation system for the central median strip of a highway, including a constant pressure water supply pump station 1, a drip irrigation network 2, a soil monitoring sensor assembly 3, and a control network; The constant pressure water supply pump station 1 includes a water storage tank 101, a water pump 102 connected to the water storage tank 101, a water supply pipe 103 connected to the outlet end of the water pump 102, and a pressure regulating valve 105 installed on the water supply pipe 103. The drip irrigation network 2 includes a main drip irrigation pipe 201, on which a plurality of drip irrigation units 202 are connected. Each irrigation unit 202 corresponds to a segmented drip irrigation zone. Each drip irrigation unit 202 includes a drip irrigation branch pipe 2021, on which a plurality of drip irrigation heads 2022 are equally spaced. A zoned solenoid valve 2024 is provided between the drip irrigation branch pipe 2021 and the main drip irrigation pipe 201. The soil monitoring sensor assembly 3 includes a soil moisture sensor 301, and a set of soil monitoring sensor assemblies 3 is installed on each segment of the drip irrigation zone. The control network includes a master station PLC4 and multiple RTU controllers 5. The master station PLC4 is connected to the multiple RTU controllers 5 via an RS485 bus. The input and output terminals of each RTU controller 5 are electrically connected to the soil monitoring sensor assembly 3 of a segmented drip irrigation section and the partition solenoid valve 2024 of the drip irrigation unit 202, respectively. The output terminal of the master station PLC4 is electrically connected to the water pump 102 and the pressure regulating valve 105 of the constant pressure pump station 1.

[0021] like Figure 1 As shown, constant pressure pump station 1 is responsible for providing constant pressure water source for the drip irrigation system. Constant pressure pump station 1 supplies water to the drip irrigation main pipeline 201 of drip irrigation network 2. The drip irrigation main pipeline 201 is laid along the central median strip of the highway. Each 150-200 meter section is connected to a set of drip irrigation units 202, that is, a set of drip irrigation units 202 corresponds to a 150-200 meter long drip irrigation section of the median strip. A set of soil monitoring sensors 3 is buried in each drip irrigation section of the median strip. The soil monitoring sensors 3 can detect the soil moisture of the section. The control network formulates an irrigation strategy based on the soil moisture data detected by the soil monitoring sensors 3, and then controls the actuators on constant pressure pump station 1 and drip irrigation network 2 to accurately irrigate each drip irrigation section of the median strip according to the soil moisture. like Figure 2 As shown, the water storage tank 101 of the constant pressure pump station 1 is responsible for storing irrigation water. The water storage tank 101 is equipped with a level gauge and a water supply pipe, which can replenish water from the deep well source in a timely manner according to the water level. The irrigation water in the water storage tank 101 is pressurized by the water pump 102 and then transported to the drip irrigation network 2 through the water supply pipe 103. The water supply pipe 103 is equipped with an electrically controllable pressure regulating valve 105 to maintain a constant water supply pressure of the constant pressure pump station 1, so as to ensure the stability and continuity of the drip irrigation water flow, and at the same time prevent the drip irrigation network from bursting due to excessive pressure.

[0022] like Figure 3 As shown, the opening or closing of each drip irrigation unit 202 can be controlled by the zone solenoid valve 2024, so as to carry out targeted irrigation for each drip irrigation section according to the soil moisture conditions.

[0023] like Figure 4As shown, the soil monitoring sensor assembly 3 of each drip irrigation section transmits the soil moisture data of its section to the RTU controller. The RTU controller transmits the soil moisture data to the master PLC via RS485 bus. The master PLC, based on the drip irrigation strategy defined by the host computer, controls the power of the water pump 102 of the constant pressure pump station 1 and the opening degree of the pressure regulating valve 105 through drive circuits such as frequency converters to supply water to the drip irrigation network 2. Simultaneously, the master PLC sends control commands to each RTU controller to control the switching of the zone solenoid valves of each drip irrigation unit 202. During drip irrigation, the master PLC performs closed-loop control based on the real-time soil moisture data sent by the RTU controllers. When the soil moisture of a certain drip irrigation section reaches the set value, drip irrigation in that section is stopped to prevent over-drip irrigation from wasting water resources or causing roadbed collapse.

[0024] In this embodiment, the constant pressure pump station 1 is further configured to include a fertilizer adding device, which includes a fertilizer-water mixing tank 107 disposed above the water storage tank 101, and a fertilizer adding port 108 disposed on the top of the fertilizer-water mixing tank 107. The upper part of the fertilizer-water mixing tank 107 is connected to the water storage tank 101 through the water inlet pipe 112. A water pump 113 is installed on the water inlet pipe 112. The lower part of the mixing tank 107 is connected to the water storage tank 101 through the water outlet pipe 110. A fertilizer-water adding solenoid valve 111 is installed on the water outlet pipe 110. The fertilizer-water adding solenoid valve 111 is electrically connected to the output terminal of the main station PLC4.

[0025] like Figure 2 As shown, fertilizer is added into the fertilizer-water mixing tank 107 through the fertilizer addition port 108 at the top of the fertilizer-water mixing tank 107. Water in the water storage tank 101 can be transported to the fertilizer-water mixing tank 107 through the water pump 113 and the water inlet pipe 112, so that the fertilizer and water are premixed. When fertilization is needed, the fertilizer-water addition solenoid valve 111 is opened through the control network, and the fertilizer-water mixture enters the water storage tank 101 through the water outlet pipe 110, and is then transported to the drip irrigation network 2 through the water supply pipe 103.

[0026] In this embodiment, the fertilizer-water mixing tank 107 is further configured to include a stirring device, which includes a stirring rod 109 rotatably installed inside the fertilizer-water mixing tank 107. The top of the stirring rod 109 extends out of the top wall of the fertilizer-water mixing tank 107 and is connected to a motor 114.

[0027] The motor 114 drives the stirring rod 109 to rotate, which helps the fertilizer and water to mix thoroughly.

[0028] In this embodiment, the water supply pipe 103 is provided with a maintenance diversion pipe 104, the maintenance diversion pipe 104 is provided with a normally closed maintenance valve 115, and the pressure regulating valve 105 is provided with normally open maintenance valves 106 on both sides. The two normally open maintenance valves 106 are located within the connection points between the water supply pipe 103 and the two ends of the maintenance diversion pipe 104.

[0029] When the pressure regulating valve 105 needs to be repaired or replaced, the normally closed maintenance valve 115 can be opened and the normally open maintenance valve 106 can be closed to allow water to flow through the diversion maintenance pipe 104, so that the regulating valve 105 can be repaired or replaced without interrupting the water supply.

[0030] In this embodiment, the soil monitoring sensor assembly 3 further includes a soil temperature sensor 302, a soil pH sensor 303, and a soil conductivity sensor 304, which are connected to the input terminals of the RTU controller 5 of the drip irrigation section of the dividing zone.

[0031] In this embodiment, the soil moisture sensor 301 adopts the EC-5 soil moisture sensor. In the actual soil moisture test, due to the light, the temperature of the soil in the dividing zone is different at different times, which will cause the measurement results of the soil moisture sensor 301 to have errors. Therefore, a soil temperature sensor 302 is set to compensate for the moisture sensor 301, reduce the influence of temperature on EC-5, and improve the test accuracy of soil moisture. Meanwhile, soil pH sensor 303 and soil conductivity sensor 304 are used to monitor soil acidity and electrolyte levels. By selecting appropriate fertilizers, soil acidity and electrolyte levels can be adjusted, which further promotes the healthy growth of vegetation in the median strip.

[0032] In this embodiment, the drip irrigation branch pipe 2021 is further configured to have a pressure control valve 2023, which is electrically connected to the output of the RTU controller 5 of the drip irrigation section in which it is located. The pressure control valve 2023 is located on the drip irrigation branch pipe 2021 between the partition solenoid valve 2024 and the drip irrigation head 2022.

[0033] By setting the pressure control valve 2023, the inlet water pressure of each drip irrigation unit 202 can be controlled to ensure the stability and continuity of the drip irrigation water flow.

[0034] In practice, the aforementioned intelligent drip irrigation system has shown that water consumption can be reduced by 60%, fertilizer utilization rate increased by over 50%, and maintenance costs significantly reduced, effectively improving the efficiency and effectiveness of highway greening maintenance. The intelligent drip irrigation system achieves automated management, reducing the frequency and intensity of manual operation. This advantage is particularly evident in large, long areas such as highway medians.

[0035] In summary, this invention improves plant growth quality and water resource utilization efficiency, while also reducing maintenance costs. It provides valuable practical experience and technical reference for other regions to carry out highway greening maintenance work in similar environments, and has good promotion and application value.

[0036] In the description of this utility model, the term "multiple" refers to two or more. Unless otherwise explicitly defined, the terms "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0037] In the description of this utility model, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this utility model, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A smart drip irrigation system for the median strip of a highway, characterized in that, It includes a constant pressure pumping station (1), a drip irrigation network (2), a soil monitoring sensor assembly (3), and a control network; The constant pressure pump station (1) includes a water storage tank (101), the water storage tank (101) is connected to a water pump (102), the outlet end of the water pump (102) is connected to a water supply pipe (103), and a pressure regulating valve (105) is installed on the water supply pipe (103). The drip irrigation network (2) includes a main drip irrigation pipe (201), and several drip irrigation units (202) are connected to the main drip irrigation pipe (201). Each drip irrigation unit (202) corresponds to a section of the dividing strip drip irrigation zone. The drip irrigation unit (202) includes a drip irrigation branch pipe (2021). Multiple drip irrigation heads (2022) are equidistantly arranged on the drip irrigation branch pipe (2021). A partition solenoid valve (2024) is provided between the drip irrigation branch pipe (2021) and the main drip irrigation pipe (201). The soil monitoring sensor assembly (3) includes a soil moisture sensor (301), and a set of soil monitoring sensor assemblies (3) is installed on each segment of the drip irrigation zone. The control network includes a master station PLC (4) and multiple RTU controllers (5). The master station PLC (4) is connected to multiple RTU controllers (5) via an RS485 bus. The input and output terminals of each RTU controller (5) are electrically connected to the soil monitoring sensor assembly (3) of a segmented drip irrigation section and the partition solenoid valve (2024) of the drip irrigation unit (202), respectively. The output terminal of the master station PLC (4) is electrically connected to the water pump (102) and pressure regulating valve (105) of the constant pressure pump station (1).

2. The intelligent drip irrigation system for the central median strip of a highway according to claim 1, characterized in that, The constant pressure pump station (1) also includes a fertilizer addition device, which includes a fertilizer-water mixing tank (107) located above the water storage tank (101), and a fertilizer addition port (108) is provided on the top of the fertilizer-water mixing tank (107). The upper part of the fertilizer-water mixing tank (107) is connected to the water storage tank (101) through the water inlet pipe (112). A water pump (113) is installed on the water inlet pipe (112). The lower part of the mixing tank (107) is connected to the water storage tank (101) through the water outlet pipe (110). A fertilizer-water adding solenoid valve (111) is installed on the water outlet pipe (110). The fertilizer-water adding solenoid valve (111) is electrically connected to the output terminal of the main station PLC (4).

3. The intelligent drip irrigation system for the central median strip of a highway according to claim 2, characterized in that, The fertilizer-water mixing tank (107) is equipped with a stirring device, which includes a stirring rod (109) that is rotatably installed inside the fertilizer-water mixing tank (107). The top of the stirring rod (109) extends out of the top wall of the fertilizer-water mixing tank (107) and is connected to a motor (114).

4. The intelligent drip irrigation system for the central median strip of a highway according to claim 1, characterized in that, The water supply pipe (103) is provided with a maintenance diversion pipe (104), and the maintenance diversion pipe (104) is provided with a normally closed maintenance valve (115). The pressure regulating valve (105) is provided with normally open maintenance valves (106) on both sides. The two normally open maintenance valves (106) are located within the connection points between the water supply pipe (103) and the maintenance diversion pipe (104).

5. The intelligent drip irrigation system for the central median strip of a highway according to claim 1, characterized in that, The soil monitoring sensor assembly (3) also includes a soil temperature sensor (302), a soil pH sensor (303), and a soil conductivity sensor (304), which are connected to the input of the RTU controller (5) of the drip irrigation section of the dividing zone.

6. The intelligent drip irrigation system for the central median strip of a highway according to claim 1, characterized in that, A pressure control valve (2023) is installed on the drip irrigation branch pipe (2021). The pressure control valve (2023) is electrically connected to the output end of the RTU controller (5) of the drip irrigation section in which it is located. The pressure control valve (2023) is located on the drip irrigation branch pipe (2021) between the partition solenoid valve (2024) and the drip irrigation head (2022).

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