Drip irrigation device capable of recycling rainwater

Abstract

The utility model discloses a drip irrigation device capable of recycling rainwater. The drip irrigation device adopts a structure combining three stages of water storage units, a water delivery pipe network and intelligent control. The third-stage water storage unit comprises a reservoir, a water storage tank and water collecting tank groups which are connected in series in groups. The water delivery pipe network realizes water level communication between the water storage tank and the water collection tanks through water conduits, and each water collection tank is connected with two irrigation subareas. The automatic control unit monitors data in real time through a water level sensor and a soil humidity sensor and controls intelligent starting and stopping of the two-way water pump and the irrigation water pump, and water storage allocation and irrigation automation are achieved. The device integrates the functions of rainwater collection, hierarchical storage and intelligent drip irrigation through modular design, has the advantages of being adjustable in water storage capacity, flexible in irrigation partition, high in water resource utilization rate and the like, and is particularly suitable for agricultural and garden water-saving irrigation scenes.

Description

Technical Field

[0001] This utility model relates to the field of garden irrigation technology, and in particular to a drip irrigation device for rainwater harvesting and utilization. Background Technology

[0002] Irrigation in gardens has long been a key issue to be addressed in garden greening and planting. To ensure sufficient soil moisture, people have long relied on traditional ground sprinkler irrigation. Traditional sprinkler irrigation has the following shortcomings: (1) It is overly dependent on municipal water supply and lacks rainwater collection and utilization; (2) It lacks intelligence, relies on human experience to judge irrigation needs, lacks accurate data support, lacks soil moisture monitoring, cannot dynamically adjust irrigation plans according to soil moisture, lacks automated control functions, and is prone to over-irrigation or under-irrigation; (3) It has limited rainwater storage and purification capacity, lacks a multi-level water level complementarity mechanism, and has a single water storage system; (4) Pipelines are prone to blockage and maintenance costs are high.

[0003] To address the aforementioned problems, this invention proposes a drip irrigation system that integrates rainwater harvesting, multi-stage water storage, water purification, and intelligent control. Summary of the Invention

[0004] The purpose of this invention is to provide a rainwater harvesting and utilization drip irrigation device to solve the technical problems of serious water waste, poor irrigation effect, and difficulty in achieving automated control and intelligent management in the existing technology. This invention provides a rainwater harvesting and utilization drip irrigation device that can automatically monitor soil moisture and perform drip irrigation based on the monitoring information. It can also harvest and utilize rainwater to prevent over-irrigation or under-irrigation, as detailed below.

[0005] To achieve the above objectives, this utility model provides a rainwater harvesting and utilization drip irrigation device, comprising: a three-stage water storage unit, a water supply network, and an automatic control unit, wherein...

[0006] The three-stage water storage unit is used to collect and store rainwater, including a water storage tank, a water storage tank, and several water collection tanks. Each water collection tank is equipped with a rainwater collector on top for directly receiving and storing rainwater. The water storage tank is used to store excess rainwater introduced by the water collection tank. The water storage tank is used to store excess rainwater introduced by the water storage tank and is connected to the municipal water supply.

[0007] The water transmission network, connecting each of the aforementioned water storage units, is used for the scheduling and allocation of rainwater, including:

[0008] A bidirectional water pump, connecting the water storage tank and the reservoir, is used to bidirectionally transport water between the water storage tank and the reservoir.

[0009] A water inlet pipe connects the water storage tank and the water collection tank, and is used for bidirectional water transfer between the water collection tank and the water storage tank.

[0010] The system comprises several irrigation zones, with each water collection tank directly connected to two irrigation zones. Each irrigation zone includes an irrigation water pump for connecting the water collection tank and an irrigation pipe. The irrigation pipe is equipped with several bypass valves, each of which is connected to a drip irrigation pipe. The irrigation water pump is used to draw water from the water collection tank into the irrigation pipe in one direction. The irrigation pipe guides the irrigation water into the drip irrigation pipe, which is used for drip irrigation.

[0011] The automatic control unit is used for the automatic control of water storage level and drip irrigation. It includes a water level sensor installed in the water storage tank, a soil moisture sensor buried in each irrigation zone, and a control unit that is signal-connected to both. Each irrigation zone is provided with at least one soil moisture sensor to obtain soil moisture information of that irrigation zone. The water level sensor is used to obtain water level information inside the water storage tank. The control unit can control the working mode of the bidirectional water pump and the start and stop of the irrigation water pump by sending signals.

[0012] In the above technical solution, preferably, the control unit is configured as follows:

[0013] Upon receiving the signal from the water level sensor, when the obtained water level value of the storage tank exceeds the threshold, the bidirectional water pump is controlled to transport water to the water storage tank; when the obtained water level value of the storage tank is lower than the threshold, the bidirectional water pump is controlled to replenish water in the opposite direction.

[0014] The system receives signals from a soil moisture sensor. When the soil moisture value is lower than a threshold, it controls the irrigation pump in the irrigation zone to start drip irrigation. When the soil moisture value is higher than the threshold, it controls the irrigation pump in the irrigation zone to stop drip irrigation.

[0015] In the above technical solution, preferably, the water storage tank, water collection tank and water reservoir are all buried in the soil, and their top height is lower than the ground surface. The bottom of the water storage tank and each water collection tank is at the same horizontal plane. The multiple water collection tanks are divided into several groups. The water collection tanks in each group are connected in series through water inlet pipes. The water inlet pipes of each group are connected in parallel to the water storage tank. Each section of the water inlet pipe and the irrigation pipe are buried horizontally in the soil at the same horizontal plane.

[0016] In the above technical solution, preferably, a first water tank interface is provided at the connection interface between the water inlet pipe and the water storage tank and the water collection tank; a second water tank interface is provided at the connection interface between the bidirectional water pump and the water storage tank; and a third water tank interface is provided at the connection interface between the irrigation water pump and the water collection tank. The water tank interfaces are used for interface sealing to prevent water leakage.

[0017] Wherein, the second water tank interface at the connection between the bidirectional water pump and the water storage tank is higher than the first water tank interface. The position of the second water tank interface should be set to minimize the impact of sand sediment at the bottom of the water storage tank on the bidirectional water pump, and should not be too high. It should be ensured that the bidirectional water pump can lower the water level of the water storage tank to the highest water level line.

[0018] Each of the first water tank interfaces is located at the same horizontal plane, below the lowest water level line of the storage tank. The location of this configuration should be designed so that when the water level in the storage tank drops to the lowest water level line, the water inlet pipe remains full. This configuration ensures that the water levels in the storage tank and each collection tank remain consistent, achieving simultaneous rise and fall of water levels. This allows for the use of a bidirectional water pump to regulate the water levels in the storage tank and each collection tank, ensuring that the water levels in the storage tank and each collection tank remain within a set range, preventing overflow during rainwater collection and ensuring uninterrupted water supply during irrigation.

[0019] The third water tank interface and the first water tank interface, which connect to the water collection tank, are horizontally aligned and located on the lower part of the side wall of the water collection tank, below the lowest water level. This ensures that the irrigation pump can always draw water from the three-stage water storage unit during irrigation.

[0020] The volume of the water storage tank must be at least larger than the volume of a single water collection tank to ensure that it can accommodate the rainwater collected by each water collection tank for a certain period of time. The volume of each water collection tank can also be set differently. The volume setting of the water collection tank needs to take into account the different situations of the connected irrigation zones and match the irrigation water consumption of the irrigation zones. The estimation of the irrigation water consumption of the irrigation zones needs to take into account factors such as the area, climate, terrain, and crop type of the irrigation zones.

[0021] The second water tank interface and the third water tank interface are also equipped with filter screens, which are used to filter mud and sand, prevent water pump damage, and prevent mud and sand from clogging the irrigation pipe and drip irrigation pipe.

[0022] In the above technical solution, preferably, the rainwater collector includes a detachable rainwater mesh frame and a rainwater collection cylinder, wherein the rainwater collection cylinder is inserted into the rainwater mesh frame for collecting and initially filtering rainwater before it enters the water collection tank.

[0023] In the above technical solution, preferably, the water inlet pipe and the irrigation pipe are also provided with adapters for expanding the water supply network. The adapters can be L-shaped adapters for pipe turning or T-shaped adapters for pipe branching.

[0024] In the above technical solution, preferably, the volume of the water storage tank is larger than the volume of a single water collection tank, and the volume of each water collection tank is configured differently according to the water demand of the connected irrigation zone.

[0025] In the above technical solution, preferably, the drip irrigation pipe is a PE pipe, the drip irrigation pipe is buried at a depth of 10-30cm, and is evenly distributed in a grid pattern in each irrigation zone, and the drip irrigation pipe and the soil moisture sensor are buried near the plant root layer.

[0026] In the above technical solution, preferably, the control unit 13 is equipped with a wireless communication module. The control unit can receive wireless signals sent by the soil moisture sensor and the water level sensor, and perform wireless communication control on the irrigation pump and the bidirectional pump.

[0027] This invention also provides a method for implementing a drip irrigation device for rainwater harvesting and utilization, specifically...

[0028] When it rains, rainwater enters the collection tank through the rainwater collector on the top of the collection tank. The rainwater in the collection tank is then transported to the storage tank through the water pipe. When the water level in the storage tank exceeds the upper limit, the water level sensor transmits the water level data signal to the control unit. The control unit controls the bidirectional water pump to transport the water to the storage tank for storage, ensuring that the stored water does not overflow.

[0029] When the water level in the collection tank drops due to irrigation or other reasons, since the water levels in the storage tank and the collection tank rise and fall synchronously, when the water level in the storage tank drops below the set minimum water level, the water level sensor transmits the water level data signal to the control unit. The control unit controls the bidirectional water pump to draw water from the reservoir to replenish the storage tank, raising the water level in the storage tank and consequently raising the water levels in each collection tank, so that the water level in the collection tank is always kept within the set range, ensuring continuous flow during irrigation.

[0030] When the detected soil moisture is below the set threshold, the soil moisture sensor transmits the moisture data signal to the control unit. The control unit then starts the irrigation pump for the corresponding irrigation zone, draws water from the collection tank, and performs precise irrigation for the irrigation zone through the irrigation pipe and drip irrigation pipe. When the detected moisture is above the set threshold, the soil moisture sensor transmits the moisture data signal to the control unit, and the control unit shuts down the irrigation pump for the corresponding irrigation zone, stopping irrigation.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] Significantly improves rainwater utilization and reduces reliance on municipal water supply;

[0033] Precision irrigation is achieved through soil moisture feedback, enabling intelligent control and resulting in significant water savings.

[0034] A multi-level intelligent water storage and water level linkage mechanism ensures long-term stable operation of the system;

[0035] Modular design facilitates expansion and maintenance. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the drip irrigation device for rainwater recycling of this utility model in a garden layout;

[0038] Figure 2 yes Figure 1 A side sectional view of the water collection tank used in the process;

[0039] Figure 3 yes Figure 1 A three-dimensional schematic diagram of the rainwater collector on top of the water collection tank used in the process;

[0040] Figure 4 yes Figure 1 A side sectional view of the water storage tank used in the process;

[0041] Figure 5 This is a flowchart of the operation of the device of this utility model;

[0042] In the diagram: 1. Water storage tank; 2. Water storage tank; 3. Water collection tank; 4. Water inlet pipe; 41. First water tank interface; 5. Irrigation pipe; 6. Drip irrigation pipe; 7. Two-way water pump; 71. Second water tank interface; 8. Irrigation water pump; 81. Third water tank interface; 9. Rainwater collector; 91. Rainwater grid frame; 92. Rainwater collection cylinder; 10. Bypass valve; 11. Water level sensor; 12. Soil moisture sensor; 13. Control unit; 14. Adapter; 15. Soil. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0044] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0045] Appendix Figure 1 This is a schematic diagram of the rainwater harvesting and utilization drip irrigation device of this utility model in a garden layout. As shown in the diagram, the rainwater harvesting and utilization drip irrigation device is buried in the soil 15 and includes a water storage tank 1, a water storage tank 2, a water collection tank 3, and water inlet pipes 4. A bidirectional water pump 7 is installed between the water storage tank 1 and the water storage tank 2. Multiple water collection tanks 3 are divided into several groups, and the water collection tanks 3 in each group are connected in series via water inlet pipes 4. Each group of water inlet pipes is connected in parallel to the water storage tank 2. Each water collection tank 3 connects to two irrigation zones, supplying water for irrigation. Each irrigation zone includes an irrigation water pump connected to the water collection tank 3. 8. The irrigation pump 8 is connected to the irrigation pipe 5. The irrigation pipe 5 is connected to several drip irrigation pipes 6 through the bypass valve 10. The drip irrigation pipes 6 are evenly distributed in the irrigation zone in a grid pattern. A soil moisture sensor 12 is also buried at the center of the grid. The water inlet pipe 4 is provided with a first water tank interface 41 at the connection interface between the water inlet pipe 4 and the water storage tank 2 and the water collection tank 3. The bidirectional water pump 7 is provided with a second water tank interface 71 at the connection interface between the water storage tank 2 and the water collection tank 3. The irrigation pump 8 is provided with a third water tank interface 81 at the connection interface between the water inlet pipe 4 and the irrigation pipe 5. An adapter 14 is also provided on the water inlet pipe 4 and the irrigation pipe 5. In addition, a control unit 13 is also provided.

[0046] Appendix Figure 2 yes Figure 1 The side sectional view of the water collection tank 3 used in the process shows that the top of the water collection tank 3 is equipped with a rainwater collector 9. The first water tank interface 41 and the third water tank interface 81 are on the same horizontal plane and are located on the side of the water collection tank 3 near the lower end. The third water tank interface 81 is also equipped with a filter screen. The irrigation pipe 6 connected to the irrigation pump 8 is also equipped with an adapter 14. The irrigation pipe 5 is connected to the drip irrigation pipe 6 through a bypass valve 10. A soil moisture sensor 12 is buried near the drip irrigation pipe 6.

[0047] Appendix Figure 3 yes Figure 1The diagram shows a three-dimensional representation of the rainwater collector 9 on top of the water collection tank 3. As can be seen from the diagram, the rainwater collector 9 includes a detachable rainwater mesh frame 91 and several rainwater collection cylinders 92 disposed within the mesh frame. Rainwater is collected by the rainwater collector 9 during rainfall to ensure sufficient water storage in the water collection tank 3.

[0048] Appendix Figure 4 yes Figure 1 The side sectional view of the water storage tank 1 and water storage tank 2 used in the process is shown in the side sectional view. It can be seen from the side sectional view that the second water tank interface 71 is located near the upper end of the side wall of the water storage tank 2, and multiple first water tank interfaces 41 are located near the lower end of the side wall of the water storage tank 2 and are on the same horizontal plane. The water storage tank 2 is also equipped with a water level sensor 6.

[0049] Appendix Figure 5 This is a flowchart illustrating the overall workflow of the rainwater harvesting and utilization drip irrigation device.

[0050] The present invention will be further described below with reference to the accompanying drawings:

[0051] like Figure 1-4 As shown, this utility model provides a drip irrigation device for rainwater recycling. The device includes a three-stage water storage unit consisting of a water storage tank 1, a water storage tank 2, and several water collection tanks 3; a water transmission network consisting of a bidirectional water pump 7, a water inlet pipe 4, and several irrigation zones; and an automatic control unit consisting of a data acquisition unit and a control unit 13.

[0052] Specifically, in the three-stage water storage unit, the collection tank 3 is used to collect rainwater during rainfall. The collection tank 3 is connected to the storage tank 2 via a water inlet pipe 4, and the collected rainwater can be introduced into the storage tank 2. The storage tank 2 is connected to the reservoir 1 via a bidirectional water pump 7. The reservoir 1 is used to store rainwater and connect to the municipal pipe network, thus realizing the connection of the three-stage water storage unit.

[0053] The irrigation zone includes an irrigation pump 8 connected to a water collection tank 3. The irrigation pump 8 is connected to an irrigation pipe 5. The irrigation pipe 5 is connected to several drip irrigation pipes 6 through a bypass valve 10, thus realizing the connection between the water storage end and the irrigation end.

[0054] Specifically, the data acquisition unit includes a water level sensor 11 installed in the water storage tank 2 and a soil moisture sensor 12 buried in the irrigation zone. The water level sensor 11 is used to acquire water level data in the water storage tank 2, and the soil moisture sensor 12 is used to acquire soil moisture data in the irrigation zone. The water level sensor 11 and the soil moisture sensor 12 are signal-connected to the control unit 13, which can transmit the acquired data signals to the control unit 13. The control unit 13 is signal-connected to the bidirectional water pump 7, which can control the start and stop of the bidirectional water pump 7 and the switching of the pumping direction. The control unit 13 is signal-connected to the irrigation water pump 8, which can control the start and stop of the irrigation water pump 8.

[0055] Control unit 13 is configured as follows:

[0056] The system receives data signals from the water level sensor 11. When the water level value of the storage tank 2 exceeds the set maximum value, it controls the bidirectional water pump 7 to transport water to the water storage tank 1. When the water level value of the storage tank 2 is lower than the set minimum value, it controls the bidirectional water pump 7 to replenish water to the storage tank 2 in reverse to the set water level.

[0057] The system receives data signals from the soil moisture sensor 12. When the soil moisture value of the irrigation zone is lower than the set minimum value, the system controls the irrigation pump 8 of the irrigation zone to start drip irrigation. When the soil moisture value of the irrigation zone exceeds the set maximum value, the system controls the irrigation pump 8 of the irrigation zone to stop drip irrigation.

[0058] Specifically, the top surfaces of the water storage tank 1, water storage tank 2, and water collection tank 3 are lower than the ground surface. The bottoms of water storage tank 2 and each of the water collection tanks 3 are at the same horizontal level. Figure 1 As shown, multiple water collection tanks 3 are divided into several groups. The water collection tanks 3 in each group are connected in series through water inlet pipes 4. The water inlet pipes of each group are connected in parallel to the water storage tank 2. Each section of water inlet pipe 4 and irrigation pipe 5 are buried horizontally in the soil at the same level.

[0059] like Figure 2 , Figure 4 As shown, the first water tank interface 41, the second water tank interface 71, and the third water tank interface 81 are used for interface sealing to prevent water leakage. The second water tank interface 71 and the third water tank interface 81 are also equipped with filter screens to filter out sediment, preventing water pump wear and tear and preventing sediment from clogging the irrigation pipe 5 and the drip irrigation pipe 6.

[0060] like Figure 4 As shown, the second water tank interface 71 is positioned higher than the first water tank interface 41. Its position is designed to minimize the impact of sand sediment at the bottom of the storage tank 2 on the bidirectional water pump 7, so it is positioned higher, but not too high, ensuring that the bidirectional water pump 7 can lower the water level in the storage tank 2 to the highest water level line. The multiple first water tank interfaces 41 are positioned at the same horizontal level, below the lowest water level line of the storage tank 2. This is designed to ensure that when the water level in the storage tank 2 drops to the lowest water level line, the water inlet pipe 4 remains full. This configuration ensures that the water levels in the storage tank 2 and each collection tank 3 remain consistent, achieving simultaneous rise and fall of water levels. The control unit 13 controls the water level in the storage tank 2 by controlling the bidirectional water pump 7, thereby controlling the water levels in each collection tank 3 and ensuring that the water levels in the storage tank 2 and each collection tank 3 remain within the set range, preventing overflow during rainwater collection and ensuring sufficient water for irrigation.

[0061] like Figure 2As shown, the third water tank interface 81 and the first water tank interface 41 connected to the water collection tank 3 are horizontally aligned and are both located on the lower part of the side wall of the water collection tank 3, below the lowest water level. This ensures that the irrigation pump 8 can always draw water from the three-stage water storage unit when irrigating.

[0062] To ensure that the water levels in the water storage tank 2 and each of the water collection tanks 3 remain consistent, the bottoms of the water storage tank 2 and the water collection tanks 3 must be on the same horizontal plane. This can be achieved during construction using a water pipe level. The burial depth of the water storage tank 2 and each of the water collection tanks 3 can be set to 50cm. The water inlet pipe 4 connecting the two is horizontally arranged, and the connection position needs to be set below the lowest water level line. Its burial depth can be set to 40cm. In this way, the water in the water storage tank 2 and each of the water collection tanks 3 is always connected.

[0063] As an optional solution, the volume of the water storage tank 2 should be at least larger than that of a single water collection tank 3 to ensure that it can accommodate the rainwater collected by each water collection tank 3 for a certain period of time. The volume of each water collection tank 3 can also be set differently. The volume setting of the water collection tank 3 needs to take into account the different situations of the connected irrigation zones and match the irrigation water consumption of the irrigation zones. The estimation of the irrigation water consumption of the irrigation zones needs to take into account factors such as the area, climate, terrain, and crop type of the irrigation zones.

[0064] like Figure 2 , Figure 3 As shown, a detachable rainwater collector 9 is installed on the top of the water collection tank 3. The rainwater collector 9 includes a rainwater mesh frame 91 and a rainwater collection cylinder 92. The rainwater collection cylinder 92 is inserted into the rainwater mesh frame 91 to collect and initially filter rainwater before it enters the water collection tank 3. The rainwater collection cylinder 92 can be flexibly removed to clean the filtered debris.

[0065] The water inlet pipe 4 and the irrigation pipe 5 are also equipped with adapters 14 to facilitate the expansion and maintenance of the irrigation module. Adapters 14 can be L-type adapters for pipe turning or T-type adapters for pipe branching.

[0066] The drip irrigation pipe 6 and the irrigation pipe 5 are connected by a bypass valve 10. The drip irrigation pipe 6 and the irrigation pipe 5 are placed at the same depth, which can be set to 10-30cm. Both the irrigation pipe 5 and the drip irrigation pipe 6 are PE pipes. The pipe wall of the drip irrigation pipe 6 has evenly distributed drip irrigation holes, and the hole spacing is set to 10-20cm according to the water requirements of the plants. The soil moisture sensor 12 is buried near the plant root layer at a depth of 10-30cm, and at least one soil moisture sensor 12 is buried in each irrigation zone. In order to improve the comprehensiveness of humidity detection, three soil moisture sensors 12 can be buried in a triangular distribution.

[0067] Specifically, the control unit 13 should be equipped with a wireless communication module. The control unit 13 can receive wireless signals sent by the soil moisture sensor 12 and the water level sensor 6, and perform wireless communication control on the irrigation pump 8 and the bidirectional pump 7.

[0068] like Figure 5 As shown, the method of using this utility model is as follows:

[0069] Rainwater collection and intelligent storage: When it rains, rainwater enters the rainwater collection tank 3 through the rainwater collector 9 on the top of the collection tank 3. The rainwater in the collection tank 3 is transported to the storage tank 2 through the water pipe 4. When the water level in the storage tank 2 exceeds the upper limit, the control unit 13 controls the bidirectional water pump 7 to transport the water to the water storage tank 1 for storage, ensuring that the stored water does not overflow.

[0070] When the water level in the collection tank 3 drops due to irrigation or other reasons, since the water levels in the storage tank 2 and the collection tank 3 rise and fall synchronously, when the water level in the storage tank 2 drops below the set minimum water level, the control unit 13 controls the bidirectional water pump 7 to pump water from the water storage tank 1 to replenish the storage tank 2, raising the water level in the storage tank 2 and consequently raising the water levels in each collection tank 3, so that the water level in the collection tank 3 is always kept within the set range, ensuring continuous flow during irrigation.

[0071] Drought monitoring and intelligent drip irrigation: Soil moisture sensor 12 monitors soil moisture in real time. When the moisture is lower than the set threshold, the control unit 13 starts the irrigation water pump 8 of the corresponding irrigation zone. Water in the water collection tank 3 flows through the irrigation pipe 5 and the drip irrigation pipe 6 to irrigate the irrigation zone precisely. When the moisture is higher than the set threshold, the control unit 13 turns off the irrigation water pump 8 of the corresponding irrigation zone and stops irrigation.

[0072] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A drip irrigation device for rainwater harvesting and utilization, characterized in that, include: Three-stage water storage units, water transmission network and automatic control unit; The three-stage water storage unit includes a water storage tank (1), a water storage tank (2) and several water collection tanks (3). The top of the water collection tank (3) is equipped with a rainwater collector (9). The water storage tank (2) is connected to the water storage tank (1) through a two-way water pump (7). The multiple water collection tanks (3) are divided into several groups. The water collection tanks in each group are connected in series through water inlet pipes (4). The water inlet pipes of each group are connected in parallel to the water storage tank (2). The water supply network includes a water inlet pipe (4) connecting the water storage tank (2) and the water collection tank (3), and irrigation zones connecting each water collection tank (3). Each water collection tank (3) connects two irrigation zones. The irrigation zone includes an irrigation pump (8), an irrigation pipe (5), and a drip irrigation pipe (6). The irrigation pipe (5) is connected to the grid-distributed drip irrigation pipe (6) through a bypass valve (17). The automatic control unit includes a water level sensor (11) installed in the water storage tank (2), a soil moisture sensor (12) buried in each irrigation zone, and a control unit (13) connected to both of them; the control unit (13) is connected to the bidirectional water pump (7) and the irrigation water pump (8) to control their opening and closing according to the water level and soil moisture data.

2. The apparatus according to claim 1, characterized in that, The bottom of the water storage tank (2) and each water collection tank (3) are on the same horizontal plane. The connection interface between the bidirectional water pump (7) and the water storage tank (2) is located on the upper part of the side wall of the water storage tank (2). The connection interface between the water inlet pipe (4) and the water storage tank (2) is located on the lower part of the side wall of the water storage tank (2) and is lower than the lowest water level line of the water storage tank (2).

3. The apparatus according to claim 2, characterized in that, The rainwater collector (9) includes a detachable rainwater grid frame (91) and a rainwater collection cylinder (92) embedded therein. The lower part of the side wall of the water collection tank (3) is provided with several horizontally aligned interfaces, which are respectively connected to the water inlet pipe (4) and the irrigation water pump (8).

4. The apparatus according to claim 1, characterized in that, The connection interface between the water inlet pipe (4) and the water storage tank (2) and the water collection tank (3) is provided with a first water tank interface (41), the connection interface between the bidirectional water pump (7) and the water storage tank (2) is provided with a second water tank interface (71), and the connection interface between the irrigation water pump (8) and the water collection tank (3) is provided with a third water tank interface (81). The second water tank interface (71) and the third water tank interface (81) are both provided with filter screens.

5. The apparatus according to claim 1, characterized in that, The water supply pipe (4) and irrigation pipe (5) are equipped with adapters (14), and the drip irrigation pipe (6) is a PE pipe and is evenly distributed in a grid pattern, with a soil moisture sensor (12) buried in the center of the grid.

6. The apparatus according to claim 1, characterized in that, The control unit (13) is connected to the soil moisture sensor (12), water level sensor (11), irrigation pump (8) and bidirectional pump (7) via a wireless communication module.

7. The apparatus according to claim 1, characterized in that, The volume of the water storage tank (2) is larger than that of a single water collection tank (3), and the volume of each water collection tank (3) is configured according to the area of ​​the irrigation zone it is connected to and the water requirements of the plants.

8. The apparatus according to claim 1, characterized in that, The water storage tank (1), water storage tank (2) and water collection tank (3) are all buried in the soil, and their top height is lower than the ground surface.

9. The apparatus according to claim 5, characterized in that, The adapter (14) is an L-type or T-type adapter used for pipeline turning or branching.

10. The apparatus according to claim 5, characterized in that, The drip irrigation pipe (6) is buried at a depth of 10-30cm, and the drip irrigation pipe (6) and the soil moisture sensor (12) are buried near the plant root system.

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