Rainwater collection and drip irrigation device for large tree transplanting in highway greening relocation project

Abstract

The utility model provides a highway afforestation relocation engineering big tree transplanting rainwater collection and storage drip irrigation device for irrigating transplanting big tree, has such characteristics, include: rainwater collection unit, including the rainwater collection pond for collecting rainwater, purification unit sets up in the rainwater collection pond is used for purifying the rainwater that collects in the rainwater collection pond, drip irrigation unit is connected rainwater collection pond and the root system soil of transplanting big tree is used for irrigating transplanting big tree with the rainwater after purifying.

Description

Technical Field

[0001] This utility model relates to the technical field of highway greening relocation projects, specifically to a rainwater collection and drip irrigation device for large tree transplantation in highway greening relocation projects. Background Technology

[0002] In highway greening relocation projects, large trees require continuous irrigation for 1-2 years after transplantation to ensure their survival. Traditional methods rely on water trucks or fixed pipelines, which suffer from three major drawbacks: water waste, high maintenance costs, and difficulties in constructing the central median. Especially in water-scarce areas, rainwater resources are not effectively utilized.

[0003] To address the aforementioned issues, existing technologies employ rainwater harvesting and drip irrigation systems for highway greening, primarily utilizing a single purification model of "rainwater collection + physical filtration + drip irrigation." A typical solution is as follows:

[0004] 1. Rainwater collection: Rainwater is collected through hardened slopes or simple ditches, and after preliminary filtration by a screen, it flows into a rainwater collection tank.

[0005] 2. Purification treatment: The rainwater collection tank is equipped with only physical filtration devices such as quartz sand filters, which rely on mechanical interception to remove large particulate impurities.

[0006] 3. Drip irrigation system: The system only meets the needs of irrigation.

[0007] The above solution has the following disadvantages:

[0008] 1. Limited purification effect: Physical filtration alone cannot effectively remove nutrients such as nitrogen and phosphorus from rainwater, which can easily lead to eutrophication of the rainwater collection pond.

[0009] 2. Lack of ecological benefits: The lack of biological purification means that an aquatic ecosystem cannot be built, resulting in a weak effect on improving the surrounding environment.

[0010] 3. High maintenance costs: Relying solely on physical filtration leads to easy clogging of the physical filter, requiring frequent filter replacements and significant manpower investment.

[0011] 4. Monotonous landscape: The device only meets functional requirements, without considering the improvement of the road landscape, and has a low degree of integration with the surrounding greenery. Utility Model Content

[0012] This utility model was developed to solve the above-mentioned problems, and its purpose is to provide a rainwater collection and drip irrigation device for large tree transplantation in highway greening relocation projects.

[0013] The rainwater harvesting and drip irrigation device for large tree transplantation in highway greening relocation projects is used to irrigate transplanted large trees. It has the following features: a rainwater collection unit, including a rainwater collection pond, for collecting rainwater; a purification unit, including multiple ecological floating islands and corresponding filter layers, and may also include an artificial wetland, set in the rainwater collection pond, for purifying the rainwater collected in the rainwater collection pond; and a drip irrigation unit, connecting the rainwater collection pond and the root soil of the transplanted large trees, for irrigating the transplanted large trees with the purified rainwater.

[0014] The rainwater collection and drip irrigation device for large tree transplantation in highway greening relocation projects provided by this utility model may also have the following features: the rainwater collection pool is connected to the municipal pipe network through a water supply pipe, and a water supply valve is installed on the water supply pipe.

[0015] The rainwater harvesting and drip irrigation device for large tree transplantation in highway greening relocation projects provided by this utility model may also have the following features: the rainwater collection unit further includes multiple collection ditches, which are set on both sides of the central median strip of the highway and are all connected to the rainwater collection pool. The longitudinal slope of the bottom of the collection ditch is 1:450-550. A grid with a pore size of 4-6mm is set at the entrance of the collection ditch. A filter with a filter media particle size of 0.5-1.0mm is set downstream.

[0016] The rainwater harvesting and drip irrigation device for large tree transplantation in highway greening relocation projects provided by this utility model may also have the following features: the ecological floating island includes: a main body, which is composed of multiple detachable main frames; multiple suspended carriers, which are respectively set in each main frame, forming an ecological floating bed, and multiple planting troughs are opened on its surface; multiple ecological plants are planted in the planting troughs; and a filter layer is set on the main frame to intercept suspended matter.

[0017] The rainwater harvesting and drip irrigation device for large tree transplantation in highway greening relocation projects provided by this utility model may also have the following features: the main frame is internally reinforced with ribs, the buoyancy load is ≥100kg / ㎡, the ecological floating bed is made of polyethylene, has a porous structure with a porosity ≥70% and a thickness of 145-155 mm, the planting trough is 95-105 mm deep and 75-85 mm wide, and the ecological plants are one or more combinations of emergent plants, floating-leaved plants or submerged plants, with their roots extending into the water.

[0018] The rainwater collection and drip irrigation device for large tree transplantation in highway greening relocation projects provided by this utility model may also have the following features: the ecological floating island also includes multiple contact carriers, which are set on the suspended carrier and distributed near multiple root systems.

[0019] The rainwater harvesting and drip irrigation device for large tree transplantation in highway greening relocation projects provided by this utility model may also have the following features: the drip irrigation unit includes: a main pipe connected to a rainwater collection tank; a head unit installed on the main pipe for filtering impurities in the water from the rainwater collection tank; a water supply and distribution network connected to the main pipe for transporting the filtered water; multiple drippers buried in the root soil of the transplanted large trees and connected to the water supply and distribution network for irrigating the transplanted large trees with water transported by the water supply and distribution network; the head unit includes, arranged sequentially in the direction of water flow: a water pump for pumping water from the rainwater collection tank into the main pipe; and a filter group including: a first filter group for primary filtration and a second filter group for secondary filtration.

[0020] The rainwater collection and drip irrigation device for large tree transplantation in highway greening relocation projects provided by this utility model may also have the following features: the first device also includes a fertilizer tank, which is connected to the main pipe through a fertilizer pipeline. The fertilizer tank is set between the first filter group and the second filter group, and an electromagnetic valve is installed on the fertilizer tank.

[0021] The rainwater harvesting and drip irrigation device for large tree transplantation in highway greening relocation projects provided by this utility model may also have the following features: the water supply and distribution network includes: a main pipe, which connects to the main trunk pipe; a branch pipe, which connects to the main pipe; and multiple capillary pipes, which connect the branch pipes and multiple drippers.

[0022] Functions and effects of utility models

[0023] The rainwater harvesting and drip irrigation device for large tree transplantation in highway greening relocation projects, as described in this utility model, has the following beneficial effects:

[0024] Through a composite purification system of "physical filtration + ecological purification", impurities and pollutants such as nitrogen and phosphorus in rainwater are effectively removed, improving the rainwater purification effect. On the one hand, this ensures the normal operation of the pipeline of this utility model device and reduces the risk of blockage. On the other hand, it provides a better irrigation water source for transplanted trees and promotes the growth of transplanted trees. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the rainwater collection and drip irrigation device for large tree transplantation in a highway greening relocation project, as described in this utility model embodiment.

[0026] Figure 2 This is a schematic diagram of the structure of the ecological floating island in an embodiment of this utility model.

[0027] Figure 3 This is a schematic diagram of the structure of the head device in an embodiment of this utility model.

[0028] Figure 4 This is a schematic diagram of the water supply and distribution pipeline network in an embodiment of this utility model.

[0029] Explanation of symbols for main components:

[0030] In the diagram: 100, Rainwater harvesting and drip irrigation device for large tree transplantation in highway greening relocation project; 200, Ecological floating island; 300, Drip irrigation unit; 2, Water supply and distribution network; 3, Valve; 4, Head unit; 5, Ecological plants; 6, Suspended carrier; 7, Contact carrier; 8, Rainwater harvesting tank; 9, Second filter group; 10, Fertilizer tank; 11, Main pipe; 12, First butterfly valve; 121, Second butterfly valve; 13, Flow meter; 14, Check valve; 15, First pressure gauge; 151, Second pressure gauge; 16, Safety valve; 17, Air vent valve; 18, First filter group; 20, Water pump; 21, Main pipe; 211, First branch pipe; 212, Second branch pipe; 22, Capillary tube; 23, Dripper; 24, Fertilizer pipeline; 90, Filter group. Detailed Implementation

[0031] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0032] To make the technical means, creative features, objectives and effects of this utility model easy to understand, the following embodiments, in conjunction with the accompanying drawings, provide a detailed description of the rainwater collection and drip irrigation device for large tree transplantation in highway greening relocation projects.

[0033] Figure 1 This is a schematic diagram of the rainwater collection and drip irrigation device for large tree transplantation in a highway greening relocation project, as described in this utility model embodiment.

[0034] like Figure 1 As shown in the figure, the rainwater collection and drip irrigation device 100 for the transplanting of large trees in the highway greening relocation project in this embodiment is used to irrigate the transplanted large trees, and includes a rainwater collection unit, a purification unit, and a drip irrigation unit 300.

[0035] The rainwater harvesting unit includes a rainwater collection pond 8 and multiple collection ditches for collecting rainwater.

[0036] The collection ditch is a U-shaped concrete collection ditch with permeable holes in the ditch wall. Multiple collection ditches are set on both sides of the central median strip of the highway, all of which are connected to the rainwater collection pool 8. The longitudinal slope of the bottom of the collection ditch is 1:500 to ensure that rainwater flows into the rainwater collection pool 8 by gravity.

[0037] A stainless steel grille with 5mm aperture is installed at the inlet of the collection ditch to intercept fallen leaves and debris. A quartz sand filter with a particle size of 0.5-1.0mm is connected in series downstream to remove fine particulate impurities.

[0038] The rainwater collection tank 8 is connected to the municipal water supply network via a water supply pipe, which is equipped with a water supply valve. The water supply valve is normally closed, but it opens when the water level in the rainwater collection tank 8 is lower than the preset water level, allowing water to be supplied to the rainwater collection tank 8 through the municipal water supply network, thus preventing situations where there is insufficient water to irrigate the transplanted trees.

[0039] The purification unit is installed in the rainwater collection tank 8 to purify the rainwater collected in the rainwater collection tank 8, and includes multiple ecological floating islands 200 and corresponding filter layers.

[0040] Figure 2 This is a schematic diagram of the structure of the ecological floating island in an embodiment of this utility model.

[0041] like Figure 2 As shown, the ecological floating island 200 includes a main body, multiple ecological plants 5, multiple suspended carriers 6, and multiple contact carriers 7.

[0042] In this embodiment, the main body is composed of a detachable, assembled frame formed by welding multiple HDPE hollow profiles. The profile cross-section is 50mm × 100mm, with internal reinforcing ribs, and a buoyancy load ≥ 100kg / m². The main body adopts a modular structure, with each main frame having an area of ​​1-2m². 2 It can be combined into main bodies of different shapes and sizes according to needs.

[0043] Alternatively, glass fiber reinforced plastic (FRP) can be used instead of HDPE. FRP frames have a tensile strength ≥300MPa, better weather resistance, and are suitable for saline-alkali areas. FRP has a similar density to HDPE (1.5-2.0g / cm³) and comparable buoyancy, but the cost is approximately 20% higher. The choice can be made based on the project budget.

[0044] The filter layer is a nylon mesh with a pore size of 1mm, which is set on the main frame to intercept suspended particles.

[0045] Multiple suspended carriers 6 are porous ecological floating beds, each set within a main frame, with a porosity ≥70% and made of polyethylene. The ecological floating beds are 150mm thick, and their surfaces have multiple planting troughs, each 100mm deep and 80mm wide.

[0046] Five different ecological plants are planted in the planting trough, consisting of one or more of emergent, floating-leaved, or submerged plants, with their roots naturally extending into the water. Emergent and floating-leaved plants are arranged at a ratio of 8-12 plants per square meter for emergent plants and 60%-80% coverage for floating-leaved plants.

[0047] Specifically, in this embodiment, canna lilies are planted at the edge of the ecological floating bed (300mm spacing between plants), and water lilies are planted in the middle (one plant per square meter). These plants absorb nutrients such as nitrogen and phosphorus, and the microorganisms attached to the plant roots decompose organic matter. The purified rainwater is then stored in the rainwater collection pond 8. Purification efficiency parameters: ammonia nitrogen removal rate ≥60%, total phosphorus removal rate ≥50%. Alternatively, reeds and cattails can be used instead of canna lilies, and water lilies can be used in combination instead of water lilies. This method is suitable for cold regions (above -20℃), where the plants wither in winter and regenerate in spring, with essentially the same purification effect. Alternatively, a combination of economic crops can be used, planting edible aquatic plants such as water celery and water spinach, generating economic benefits while purifying rainwater, suitable for greening around service areas.

[0048] Multiple contact carriers 7 are submerged artificial aquatic plants placed on an ecological floating bed and distributed near multiple root systems. They provide a carrier for aquatic microorganisms to attach and grow, promoting the degradation of pollutants in the water. They also slow down water flow, increase the contact time between the water and microorganisms, and promote oxygen transfer, which is beneficial to the activity of aerobic microorganisms. Together with the ecological plants 5, they further remove nutrients such as nitrogen and phosphorus from the water.

[0049] Specifically, the purification unit may also include an artificial wetland. A small artificial wetland (filler layer + emergent plants) is added downstream of the rainwater collection pond 8 to replace part of the function of the ecological floating island 200. It is suitable for road sections with a large area and the purification effect is further improved by 10%-15%.

[0050] The drip irrigation unit 300 connects the rainwater collection tank 8 and the root soil of the transplanted tree, and is used to irrigate the transplanted tree with purified rainwater. It includes a main pipe 11, a head unit 4, a water supply and distribution network 2, and multiple drippers 23.

[0051] Main pipe 11 connects to rainwater collection tank 8.

[0052] Figure 3 This is a schematic diagram of the structure of the head device in an embodiment of this utility model.

[0053] like Figure 3 As shown, the head unit 4 is installed on the main pipe 11 and is used to filter impurities in the rainwater collection tank 8, including according to the water flow direction ( Figure 3The components arranged in sequence (in the direction of the arrows in the diagram) are: water pump 20, first butterfly valve 12, flow meter 13, check valve 14, first pressure gauge 15, safety valve 16, air vent valve 17, filter group 90, and second pressure gauge 151.

[0054] Pump 20 is a centrifugal pump with a head of 30m, used to pump water from the rainwater collection tank 8 into the main pipe 11.

[0055] The filter assembly 90 includes a first filter assembly 18 and a second filter assembly 9, with a second butterfly valve 121 positioned between them. The first filter assembly 18 is a centrifugal filter assembly used for primary filtration. The second filter assembly 9 is a disc filter assembly with a 120-mesh pore size, used for secondary filtration.

[0056] The first device 4 also includes a fertilizer tank 10 with a volume of 50L, equipped with a solenoid valve. The fertilizer tank 10 is connected to the main pipe 11 via a fertilizer pipeline 24 and is located between the first filter group 18 and the second filter group 9.

[0057] Specifically, herbicide tanks or pesticide tanks can also be connected to the main pipe 11 as needed, so that the system of this utility model can have more functions.

[0058] Figure 4 This is a schematic diagram of the water supply and distribution pipeline network in an embodiment of this utility model.

[0059] like Figure 4 As shown, the water supply and distribution network 2 is connected to the main pipe 11 and is used to transport filtered water. It includes a main pipe 21, branch pipes and multiple capillary pipes 22.

[0060] Main pipe 21 is connected to main pipe 11. Main pipe 21 is made of PE100 pipe (specification: DN63). Branch pipes (specification: DN32) include first branch pipe 211 and second branch pipe 212, both of which are connected to main pipe 21, and valves 3 are installed at their connection points.

[0061] Multiple capillary tubes 22 (specification: DN16) are installed on the first branch pipe 211, connecting the first branch pipe 211 and multiple drippers 23.

[0062] Specifically, in this embodiment, a capillary tube 22 connects to two drippers 23, and the portion connected to the two drippers 23 is provided with a capillary valve for individually controlling the irrigation process of each dripper 23.

[0063] Multiple capillary tubes 22 are also installed on the second branch tube 212, and their installation method is the same as that when they are installed on the first branch tube 211, which will not be described again here.

[0064] Multiple drippers 23 are buried in the root soil of the transplanted trees and are all connected to capillary tubes 22 for irrigating the transplanted trees with water transported by the water supply and distribution network 2.

[0065] Specifically, dripper 23 is a fixed flow dripper (flow rate 2L / h), and the distance between drippers 23 is 500mm. It is buried in the soil in the root distribution area of ​​the tree (within 1.5m of the trunk).

[0066] The number of branch pipes, capillary pipes 22 and drippers 23 can be increased or decreased according to needs, and set in accordance with the number of large trees to be transplanted.

[0067] Alternatively, a fountain root irrigation device (flow rate 10-20L / h) can be used instead of dripper 23 to inject water into the deep soil of the root system in the form of a fountain. This is suitable for sandy soil areas and reduces water evaporation.

[0068] Alternatively, adjustable pressure-compensated drippers can be used instead of fixed-flow drippers, allowing manual adjustment of the flow rate from 1 to 4 L / h to suit different soil textures and plant water requirements.

[0069] Working principle:

[0070] Irrigation can be implemented through manual judgment and control or by setting up sensors and combining them with automated control.

[0071] Specifically, when sensors are set up and combined with automated control, liquid level sensors, soil moisture sensors, PLC controllers, and human-machine interaction screens can be set up.

[0072] S1: Determine whether the water level in the rainwater collection tank 8 is lower than the preset water level. If it is lower than the preset water level, proceed to step S2. If the water level is normal, proceed to step S3.

[0073] S2: Control the water supply valve to open and replenish water to the rainwater collection tank 8 through the municipal pipeline until the water level is normal.

[0074] S3: Determine if the moisture content of the root soil is lower than the preset moisture content. If it is lower than the preset moisture content, proceed to step S4. If the moisture content is normal, wait for the next result.

[0075] S4: Determine the growth period of the transplanted trees, whether they are in the recovery period, and implement the preset irrigation strategy.

[0076] S5: Implement the preset irrigation strategy: Control the water pump 20 to start, pump the water in the rainwater collection tank 8 into the main pipe 11, and at the same time control the first butterfly valve 12, check valve 14, first filter group 18, second butterfly valve 121, second filter group 9, solenoid valve, valve 3 and capillary valve to open, so that the water flows through the main pipe 11, main pipe 21, first branch pipe 211, second branch pipe 212 and capillary 22 to the dripper 23 to irrigate the transplanted trees.

[0077] The system utilizes a solenoid valve to mix the nutrient solution in fertilizer tank 10 with the water flow, allowing for simultaneous fertilization while irrigating transplanted trees. The specific fertilization frequency can be adjusted as needed. During water flow, the flow meter 13, the first pressure gauge 15, and the second pressure gauge 151 provide real-time monitoring for precise control of the irrigation water volume.

[0078] S6: After the preset irrigation strategy is implemented, if the moisture content is normal, turn off the irrigation-related components in S5 and record the irrigation data. If the moisture content is lower than the preset moisture content, repeat steps S4-S6 until the soil moisture content is normal.

[0079] S7: This irrigation session is now complete.

[0080] The preset irrigation strategies include: a high-frequency irrigation mode, specifically 0.5 hours / time, twice a day; and a growth irrigation mode, specifically 2 hours / time, once every 3 days. The high-frequency irrigation mode is implemented when transplanted trees are in the seedling establishment period; the growth irrigation mode is implemented in other situations.

[0081] The frequency of root soil moisture content assessment can be adjusted as needed, generally once daily. However, when implementing a growing irrigation mode, assessment is not performed during the irrigation process, but only on the last day of each irrigation cycle.

[0082] The role and effect of the embodiments

[0083] The rainwater harvesting and drip irrigation device 100 for large tree transplantation in highway greening relocation projects, as described in this utility model, has the following beneficial effects:

[0084] 1. Integrated Design of the Composite Purification System: Physical filtration (bar screen, quartz sand filter) is connected in series with ecological floating island purification technology to form a progressive purification process of "preliminary filtration - ecological degradation." Physical filtration ensures the normal operation of the system's pipelines and reduces the risk of blockage. The ecological floating island purification technology utilizes ecological plants and the microorganisms attached to their roots to deeply purify rainwater, removing nutrients such as nitrogen and phosphorus. Ammonia nitrogen removal rate ≥60%, total phosphorus removal rate ≥50%, effectively reducing the eutrophication level of water bodies.

[0085] 2. Modular Structure of Eco-Floating Island 200: The main body of Eco-Floating Island 200 is made of high-strength, corrosion-resistant HDPE material, and features a detachable modular structure. Each main frame has an area of ​​1-2m². 2 It can be combined into different shapes and volumes according to needs, making it easy to adapt to rainwater collection pools of different sizes.

[0086] 3. It has a complete drip irrigation system, including water collection and purification, precise control of the head unit 4, layout of the water supply and distribution network 2, and reasonable selection and arrangement of drippers 23, to ensure that water and nutrients are accurately delivered to the plant roots. It also has the function of inputting fertilizers, pesticides, herbicides, etc., to achieve comprehensive maintenance.

[0087] 4. The entire system is organically integrated with the highway greening environment, which not only meets the irrigation needs of transplanted large trees, but also enhances the ecological function and landscape effect of the highway greening area.

[0088] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A rainwater harvesting and drip irrigation device for large tree transplantation in highway greening relocation projects, used for irrigating transplanted large trees, characterized in that... include: Rainwater harvesting unit, including a rainwater collection tank, for collecting rainwater; The purification unit includes multiple ecological floating islands and corresponding filter layers, and may also include an artificial wetland, which is set in the rainwater collection pond to purify the rainwater collected in the rainwater collection pond; The drip irrigation unit connects the rainwater collection pond and the root soil of the transplanted tree, and is used to irrigate the transplanted tree with purified rainwater.

2. The rainwater harvesting and drip irrigation device for large tree transplantation in highway greening relocation projects according to claim 1, characterized in that: in, The rainwater collection tank is connected to the municipal water supply network via a water supply pipe, and a water supply valve is installed on the water supply pipe.

3. The rainwater harvesting and drip irrigation device for large tree transplantation in highway greening relocation projects according to claim 2. Its features are: in, The rainwater collection unit also includes multiple collection ditches located on both sides of the central median strip of the highway, all connected to the rainwater collection pond. The longitudinal slope of the bottom of the collection ditches is 1:450-550. A grid with a pore size of 4-6mm is provided at the entrance of the collection ditch; A filter is installed downstream, with filter media particle size of 0.5-1.0mm.

4. The rainwater harvesting and drip irrigation device for large tree transplantation in highway greening relocation projects according to claim 1. Its features are: in, The ecological floating islands include: The main body is composed of multiple detachable main frames that can be assembled together; Multiple suspended carriers are respectively set in each of the main frames, forming ecological floating beds, and multiple planting troughs are opened on their surfaces; Multiple ecological plants are planted in the planting trough; The filter layer is disposed on the main frame and is used to intercept suspended particles.

5. The rainwater harvesting and drip irrigation device for large tree transplantation in highway greening relocation projects according to claim 4, characterized in that: in, The main frame is internally reinforced with ribs, and its buoyancy load is ≥100kg / ㎡. The ecological floating bed is made of polyethylene with a porous structure, a porosity ≥70%, and a thickness of 145-155 mm. The planting trough has a depth of 95-105 mm and a width of 75-85 mm. The ecological plants are one or more of emergent plants, floating-leaved plants, or submerged plants, with their roots extending into the water.

6. The rainwater harvesting and drip irrigation device for large tree transplantation in highway greening relocation projects according to claim 5, characterized in that: in, The ecological floating island also includes multiple contact carriers, which are set on the suspended carrier and distributed near the multiple root systems.

7. The rainwater harvesting and drip irrigation device for large tree transplantation in highway greening relocation projects according to claim 1. Its features are: in, The drip irrigation unit includes: The main pipe connects to the rainwater collection tank; The first device, installed on the main pipe, is used to filter impurities in the rainwater collection tank; A water supply and distribution network, connected to the main pipeline, is used to transport the filtered water; Multiple drippers are buried in the soil around the roots of the transplanted tree and connected to the water supply and distribution network for irrigating the transplanted tree with the water transported by the water supply and distribution network. The head unit comprises components arranged sequentially according to the direction of water flow: A water pump is used to pump water from the rainwater collection tank into the main pipe; The filter set includes: The first filter group is used for primary filtration; The second filter group is used for secondary filtration.

8. The rainwater harvesting and drip irrigation device for large tree transplantation in highway greening relocation projects according to claim 7, characterized in that: in, The first device also includes a fertilizer tank, which is connected to the main pipe via a fertilizer pipeline. The fertilizer tank is located between the first filter group and the second filter group, and a solenoid valve is installed on the fertilizer tank.

9. The rainwater harvesting and drip irrigation device for large tree transplantation in highway greening relocation projects according to claim 7, characterized in that: The water transmission and distribution network includes: Main pipe, connected to the main trunk pipe; Branch pipe, connected to the main pipe; Multiple capillaries connect the branch pipe and the multiple drippers.

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