Drip irrigation device capable of recycling rainwater and implementation method of drip irrigation device

Abstract

The invention 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

[0001] The present invention relates to the technical field of garden irrigation, and in particular to a drip irrigation device for rainwater recycling. Background Art

[0002] Garden irrigation has long been a key issue to be solved in landscaping planting. In order to ensure sufficient moisture in the soil, people have long implemented irrigation through traditional ground sprinkler irrigation methods. The traditional sprinkler irrigation method has the following deficiencies: (1) It overly relies on municipal water supply and lacks the collection and utilization of rainwater; (2) It lacks intelligence, relies on manual experience to judge irrigation needs, lacks accurate data support, lacks soil moisture monitoring, cannot dynamically adjust the irrigation plan according to soil humidity, lacks an automatic control function, and is prone to over-irrigation or under-irrigation; (3) Its rainwater storage and purification capacity is limited, lacks a multi-level water level complementary mechanism, and the water storage system is single; (4) The pipeline is prone to blockage and the maintenance cost is high.

[0003] To solve the above problems, the present invention proposes a drip irrigation system integrating rainwater recycling, multi-level water storage, water quality purification and intelligent control. Summary of the Invention

[0004] The purpose of the present invention is to provide a drip irrigation device for rainwater recycling to solve the technical problems of serious water resource waste, poor irrigation effect, and difficulty in realizing automatic control and intelligent management in the prior art. The present invention provides a drip irrigation device for rainwater recycling, which can automatically monitor soil humidity and perform drip irrigation according to the monitoring information. At the same time, it can also recycle rainwater to prevent over-irrigation or under-irrigation, as detailed in the following description.

[0005] To achieve the above purpose, the present invention provides a drip irrigation device for rainwater recycling, including: a three-level water storage unit, a water pipeline network, and an automatic control unit, where The three-level water storage unit is used to collect and store rainwater, including a reservoir, a water storage tank and a number of water collection tanks. A rainwater collector is provided at the top of each water collection tank for directly receiving and storing rainwater; the water storage tank is used to store the excess rainwater introduced from the water collection tank; the reservoir is used to store the excess rainwater introduced from the water storage tank and connect to the municipal water supply; The water pipeline network is connected to each of the water storage units and is used for the scheduling and allocation of rainwater, including: A two-way water pump, connected to the water storage tank and the reservoir, for bidirectionally transporting water between the water storage tank and the reservoir, A water diversion pipe, connected to the water storage tank and the water collection tank, for bidirectionally transporting water between the water collection tank and the water storage tank, Several irrigation zones, each of the water collection tanks is directly connected to two of the irrigation zones, and each of the irrigation zones includes an irrigation water pump for connecting the water collection tank and the irrigation pipe. A number of bypass valves are provided on the irrigation pipe, and each bypass valve is connected to a drip irrigation pipe. The irrigation water pump is used to unidirectionally pump the water in the water collection tank into the irrigation pipe, and the irrigation pipe guides the irrigation water into the drip irrigation pipe, and the drip irrigation pipe is used for drip irrigation; The automatic control unit is used for the automatic control of the water storage level and drip irrigation, and includes a water level sensor arranged in the water storage tank, a soil humidity sensor buried in each irrigation zone, and a control part that is signal-connected to the two. At least one of the soil humidity sensors is correspondingly arranged in each irrigation zone for obtaining the soil humidity information of the irrigation zone, and the water level sensor is used for obtaining the water level information inside the water storage tank; the control part can respectively control the working mode of the two-way water pump and the opening and closing of the irrigation water pump by sending signals.

[0006] In the above technical solution, preferably, the control part is configured to: Receive the signal of the water level sensor. When the water level value of the water storage tank obtained exceeds the threshold, control the two-way water pump to transport water to the water storage pool. When the water level value of the water storage tank obtained is lower than the threshold, control the two-way water pump to replenish water in the reverse direction; Receive the signal of the soil humidity sensor. When the soil humidity value obtained is lower than the threshold, control the irrigation water pump in the irrigation zone to start the drip irrigation operation. When the soil humidity value obtained is higher than the threshold, control the irrigation water pump in the irrigation zone to stop the drip irrigation operation.

[0007] In the above technical solution, preferably, the water storage pool, the water storage tank and the water collection tanks are all buried in the soil, and the top height thereof is lower than the ground surface. Among them, the bottoms of the water storage tank and each water collection tank are at the same horizontal plane. The multiple water collection tanks are divided into several groups, and the water collection tanks in each group are connected in series in sequence through a water diversion pipe, and the water diversion pipes of each group are connected in parallel to the water storage tank. Each section of the water diversion pipe and the irrigation pipe are horizontally buried in the soil at the same horizontal plane.

[0008] In the above technical solution, preferably, a first water tank interface is provided at the connection interface between the water diversion pipe and the water storage tank and the water collection tank, a second water tank interface is provided at the connection interface between the two-way 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 interface is used for interface sealing to prevent water leakage, Among them, the position of the second water tank interface at the connection between the two-way 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 considered to avoid the two-way water pump being affected by the sediment and sand at the bottom of the water storage tank to the greatest extent, and it should not be too high, and it should be ensured that the two-way water pump can lower the water level of the water storage tank to the highest water level line; Each of the first water tank interfaces is at the same horizontal level and is set below the lowest water level line of the water storage tank. Its position should be considered such that when the water level in the water storage tank drops to the lowest water level line, the water inlet pipe should always be full of water. This setting can ensure that the water levels in the water storage tank and each water collection tank are always the same, achieving the same rise and fall of the water levels. In this way, the purpose of regulating the water levels in the water storage tank and each water collection tank by pumping or irrigating with a two-way water pump can be achieved, and the water levels in the water storage tank and each water collection tank can be controlled to always remain within the set range, without overflowing during rain collection and without running out of water during irrigation.

[0009] The third water tank interface and the first water tank interface connecting the water collection tank are horizontally aligned and are both located at the lower part of the side wall of the water collection tank, and are set below the lowest water level. This can ensure that the irrigation water pump can always draw water from the three-stage water storage unit during irrigation.

[0010] The volume of the water storage tank should be at least larger than the volume of a single water collection tank to ensure that it can accommodate the rainwater conducted and collected by each water collection tank within a certain period of time. The volumes of each water collection tank can also be set differently. When setting the volume of the water collection tank, the different situations of the connected irrigation zones need to be considered, and it should match the irrigation water consumption of the irrigation zone. When estimating the irrigation water consumption of the irrigation zone, factors such as the area, climate, terrain, and crop types of the irrigation zone need to be considered.

[0011] The second water tank interface and the third water tank interface are also provided with filter meshes, which are used to filter sediment to prevent pump loss and prevent sediment from blocking the irrigation pipe and the drip irrigation pipe.

[0012] In the above technical solution, preferably, the rainwater collector includes a detachable rainwater grid frame and a rainwater collection cylinder. The rainwater collection cylinder is inserted into the rainwater grid frame and is used to collect and initially filter rainwater into the water collection tank.

[0013] In the above technical solution, preferably, the water inlet pipe and the irrigation pipe are also provided with adapters for expanding the water supply pipe network. The adapter can be an L-shaped adapter for pipe turning or a T-shaped adapter for pipe branching.

[0014] 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 volumes of each water collection tank are configured differently according to the water demand of the connected irrigation zones.

[0015] In the above technical solution, preferably, the drip irrigation pipe is a PE pipe, the buried depth of the drip irrigation pipe is 10 - 30 cm, and it is evenly distributed in a grid shape in each irrigation zone. The drip irrigation pipe and the soil moisture sensor are buried near the plant root layer.

[0016] In the above technical solution, preferably, the control unit 13 is equipped with a wireless communication module. The control unit can receive the wireless signals sent by the soil humidity sensor and the water level sensor, and perform wireless communication control on the irrigation water pump and the two-way water pump.

[0017] The present invention also provides an implementation method of a drip irrigation device for rainwater recycling, specifically When it rains, rainwater enters the water collection tank through the rainwater collector at the top of the water collection tank. The rainwater in the water collection tank is transported to the water storage tank through the water diversion pipe. When the water level in the water storage tank exceeds the upper limit, the water level sensor transmits the water level data signal to the control unit, and the control unit controls the two-way water pump to transport the water to the reservoir for storage to ensure that the stored water does not overflow. When the water level in the water collection tank drops due to irrigation or other reasons, since the water levels in the water storage tank and the water collection tank rise and fall synchronously, when the water level in the water storage tank synchronously drops below the set minimum water level, the water level sensor transmits the water level data signal to the control unit, and the control unit controls the two-way water pump to pump water from the reservoir to supplement the water storage tank, raising the water level of the water storage tank and consequently raising the water levels of each water collection tank, so that the water level in the water collection tank always remains within the set range to ensure continuous water supply during irrigation. When the monitored soil humidity is lower than the set threshold, the soil humidity sensor transmits the humidity data signal to the control unit, and the control unit starts the irrigation water pump in the corresponding irrigation zone to pump the water in the water collection tank, and conducts precise irrigation on the irrigation zone through the irrigation pipe and the drip irrigation pipe. When the monitored humidity is higher than the set threshold, the soil humidity sensor transmits the humidity data signal to the control unit, and the control unit shuts down the irrigation water pump in the corresponding irrigation zone to stop irrigation.

[0018] Compared with the prior art, the present invention has the following beneficial effects: Significantly improve the utilization rate of rainwater and reduce the dependence on municipal water supply; Achieve precise irrigation through soil humidity feedback, realize intelligent control, and have remarkable water-saving effects; The multi-level intelligent water storage and water level linkage mechanism ensures the long-term stable operation of the system; The modular design is convenient for expansion and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic diagram of the drip irrigation device for rainwater recycling of the present invention in the garden layout; Figure 2 is Figure 1 The schematic side sectional view of the water collecting tank used in Figure 3 is Figure 1 The three-dimensional schematic diagram of the rainwater collector at the top of the water collecting tank used in Figure 4 is Figure 1 The schematic side sectional view of the water storage tank used in Figure 5 The working flowchart of the device of the present invention; In the figure: 1, the reservoir; 2, the water storage tank; 3, the water collecting tank; 4, the water inlet pipe, 41, the first water tank interface; 5, the irrigation pipe; 6, the drip irrigation pipe; 7, the two-way water pump, 71 the second water tank interface; 8, the irrigation water pump, 81, the third water tank interface; 9, the rainwater collector, 91, the rainwater grid frame, 92, the rainwater collecting cylinder; 10, the bypass valve; 11, the water level sensor; 12, the soil humidity sensor; 13, the control unit; 14, the adapter; 15, the soil. Specific embodiments

[0021] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the Figure 1 orientation or positional relationship shown, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0023] Appendix Figure 1It is a schematic diagram of the drip irrigation device for rainwater recycling and utilization in the present invention in the garden layout; it can be seen from the figure that the drip irrigation device for rainwater recycling and utilization is buried in the soil 15, including a reservoir 1, a water storage tank 2, a collection tank 3, and a water diversion pipe 4. A two-way water pump 7 is arranged between the reservoir 1 and the water storage tank 2. The multiple collection tanks 3 are divided into several groups, and the collection tanks 3 within each group are connected in series in sequence through the water diversion pipe 4. The water diversion pipes of each group are connected in parallel to the water storage tank 2. Each collection tank 3 communicates with the upper and lower two irrigation zones to supply irrigation water for them. Each irrigation zone includes an irrigation water pump 8 connected to the collection tank 3. The irrigation water pump 8 is connected with an irrigation pipe 5. The irrigation pipe 5 is connected with several drip irrigation pipes 6 through a bypass valve 10. The drip irrigation pipes 6 are evenly distributed in a grid pattern in the irrigation zone, and a soil moisture sensor 12 is also buried at the center position of the grid. A first water tank interface 41 is provided at the connection interface between the water diversion pipe 4 and the water storage tank 2 and the collection tank 3. A second water tank interface 71 is provided at the connection interface between the two-way water pump 7 and the water storage tank 2. A third water tank interface 81 is provided at the connection interface between the irrigation water pump 8 and the collection tank 3. A swivel joint 14 is also provided on the water diversion pipe 4 and the irrigation pipe 5. In addition, a control unit 13 is provided.

[0024] Appendix Figure 2 is Figure 1 The schematic side sectional view structure diagram of the collection tank 3 used in [description of relevant part]. It can be seen from the side sectional view structure diagram that a rainwater collector 9 is provided at the top of the collection tank 3. The first water tank interface 41 and the third water tank interface 81 are at the same horizontal plane and are both located at a position near the lower end of the side of the collection tank 3. Among them, a filter screen is also provided at the third water tank interface 81. A swivel joint 14 is also provided on the irrigation pipe 6 connected to the irrigation water pump 8. The irrigation pipe 5 is connected with the drip irrigation pipe 6 through a bypass valve 10, and a soil moisture sensor 12 is buried near the drip irrigation pipe 6.

[0025] Appendix Figure 3 is Figure 1 The three-dimensional schematic diagram of the rainwater collector 9 at the top of the collection tank 3 used in [description of relevant part]. It can be seen from the three-dimensional schematic diagram that the rainwater collector 9 includes a detachable rainwater grid frame 91 and several rainwater collection cylinders 92 arranged in the grid frame. Rainwater can be collected through the rainwater collector 9 during rain to ensure sufficient water storage in the collection tank 3.

[0026] Appendix Figure 4 is Figure 1 The schematic side sectional view structure diagram of the reservoir 1 and the water storage tank 2 used in [description of relevant part]; it can be seen from the side sectional view structure diagram that the second water tank interface 71 is located at a position near the upper end of the side wall of the water storage tank 2, and multiple first water tank interfaces 41 are located at a position near the lower end of the side wall of the water storage tank 2 and are at the same horizontal plane. A water level sensor 6 is also provided inside the water storage tank 2.

[0027] Appendix Figure 5 It is the working flow chart of the device of the present invention; it is used to represent the overall working process of the drip irrigation device for rainwater recycling and utilization.

[0028] The present invention will be further described below in conjunction with the accompanying drawings: As Figure 1-4 shown, the present invention provides a drip irrigation device for rainwater recycling and utilization. The device includes a three-stage water storage unit composed of a reservoir 1, a water storage tank 2, and several water collection tanks 3, a water delivery pipe network composed of a two-way water pump 7, a water diversion pipe 4, and several irrigation zones, and an automatic control unit composed of a data acquisition part and a control part 13.

[0029] Specifically, in the three-stage water storage unit, the water collection tank 3 is used to collect rainwater during rain. The water collection tank 3 is connected to the water storage tank 2 through the water diversion pipe 4, and the collected rainwater can be introduced into the water storage tank 2. The water storage tank 2 is connected to the reservoir 1 through the two-way water pump 7. The reservoir 1 is used to store rainwater and connect to the municipal pipe network to realize the connection of the three-stage water storage unit. The irrigation zone includes an irrigation water pump 8 connected to the water collection tank 3. The irrigation water 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.

[0030] Specifically, the data acquisition part includes a water level sensor 11 arranged in the water storage tank 2 and a soil humidity sensor 12 buried in the irrigation zone. The water level sensor 11 is used to obtain the water level data in the water storage tank 2, and the soil humidity sensor 12 is used to obtain the soil humidity data of the irrigation zone where it is located. The water level sensor 6 and the soil humidity sensor 12 are signal-connected to the control part 13 and can transmit the acquired data signals to the control part 13. The control part 13 is signal-connected to the two-way water pump 7 and can control the opening and closing of the two-way water pump 7 and the switching of the pumping direction. The control part 13 is signal-connected to the irrigation water pump 8 and can control the opening and closing of the irrigation water pump 8.

[0031] The control part 13 is configured to: Receive the data signal of the water level sensor 11. When the water level value of the water storage tank 2 obtained exceeds the set highest value, control the two-way water pump 7 to deliver water to the reservoir 1. When the water level value of the water storage tank 2 obtained is lower than the set lowest value, control the two-way water pump 7 to replenish water into the water storage tank 2 in the reverse direction to the set water level; Receive the data signal of the soil humidity sensor 12. When the soil humidity value of the irrigation zone obtained is lower than the set lowest value, control the irrigation water pump 8 of the irrigation zone to start drip irrigation operation. When the soil humidity value of the irrigation zone obtained exceeds the set highest value, control the irrigation water pump 8 of the irrigation zone to stop drip irrigation operation.

[0032] Specifically, the top surface heights of the reservoir 1, the water storage tank 2, and the water collection tank 3 are lower than the ground surface. Among them, the bottoms of the water storage tank 2 and each water collection tank 3 are at the same horizontal plane, as Figure 1As shown, multiple water collecting tanks 3 are divided into several groups. The water collecting tanks 3 within each group are connected in series in sequence through water diversion pipes 4. The water diversion pipes of each group are connected in parallel to the water storage tank 2. Each section of the water diversion pipe 4 and the irrigation pipe 5 are horizontally buried in the soil at the same horizontal plane.

[0033] As Figure 2 , Figure 4 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. A filter screen is also provided at the interface positions of the second water tank interface 71 and the third water tank interface 81. The filter screen is used to filter sediment to prevent pump loss and prevent sediment from blocking the irrigation pipe 5 and the drip irrigation pipe 6. As Figure 4 shown, the position of the second water tank interface 71 is higher than that of the first water tank interface 41. Its position setting fully considers maximizing the avoidance of the influence of the sediment deposited at the bottom of the water storage tank 2 on the two-way water pump 7, so it is set at a high position, but it should not be too high. It should also ensure that the two-way water pump 7 can lower the water level of the water storage tank 2 to the highest water level line; the positions of multiple first water tank interfaces 41 are at the same horizontal plane and are set below the lowest water level line of the water storage tank 2. Its position setting fully considers that when the water level of the water storage tank 2 drops to the lowest water level line, the water diversion pipe 4 should always be full of water. Such a setting can keep the water levels of the water storage tank 2 and each water collecting tank 3 always consistent, realizing the simultaneous rise and fall of the water levels. In this way, the control unit 13 controls the water level of the water storage tank 2 by controlling the two-way water pump 7, thereby realizing the control of the water levels of each water collecting tank 3, ensuring that the water levels of the water storage tank 2 and each water collecting tank 3 always remain within the set range, without overflowing during rain collection and without water shortage during irrigation.

[0034] As Figure 2 shown, the third water tank interface 81 and the first water tank interface 41 connecting the water collecting tank 3 are horizontally aligned and are both located at the lower part of the side wall of the water collecting tank 3, below the lowest water level, so as to ensure that the irrigation water pump 8 can always draw water from the three-stage water storage unit during irrigation.

[0035] In order to ensure that the water levels of the water storage tank 2 and each water collecting tank 3 always remain consistent, it is necessary that the bottoms of the water storage tank 2 and the water collecting tanks 3 are on the same horizontal plane. This can be achieved by a water pipe level in construction. The burial of the water storage tank 2 and each water collecting tank 3 can be set to 50 cm. The water diversion pipe 4 connecting the two is horizontally arranged, and the connection position needs to be set below the lowest water level line, and its burial depth can be set to 40 cm. In this way, the water in the water storage tank 2 and each water collecting tank 3 is always connected.

[0036] As an alternative, 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 hold the rainwater conducted and collected by each water collection tank 3 within a certain period of time. The volumes of the individual water collection tanks 3 can also be set differently. When setting the volume of the water collection tank 3, different conditions of the connected irrigation zones need to be considered, and it should match the irrigation water consumption of the irrigation zones. When estimating the irrigation water consumption of the irrigation zones, factors such as the area, climate, terrain, and crop types of the irrigation zones need to be considered.

[0037] As Figure 2 、 Figure 3 As shown, a detachable rainwater collector 9 is installed at the top inside the water collection tank 3. The rainwater collector 9 includes a rainwater grid frame 91 and a rainwater collection cylinder 92. The rainwater collection cylinder 92 is inserted into the rainwater grid frame 91 and is used to collect and initially filter rainwater into the water collection tank 3 for collecting and filtering rainwater. The rainwater collection cylinder 92 can be flexibly taken out to clean the filtered debris.

[0038] Adapter joints 14 are also provided on the water diversion pipe 4 and the irrigation pipe 5 to facilitate the expansion and maintenance of the irrigation module. The adapter joint 14 can be an L-shaped adapter joint for pipe turning or a T-shaped adapter joint for pipe branching. The drip irrigation pipe 6 is connected to the irrigation pipe 5 through a bypass valve 10. The drip irrigation pipe 6 and the irrigation pipe 5 are placed at the same depth, and the burial depth can be set to 10 - 30 cm. Both the irrigation pipe 5 and the drip irrigation pipe 6 are PE pipes. The drip irrigation holes are evenly distributed on the wall of the drip irrigation pipe 6, and the hole spacing is set to 10 - 20 cm according to the water demand of the plants. The soil moisture sensor 12 is buried near the plant root layer, and the burial depth is 20 - 50 cm. And at least one soil moisture sensor 12 is buried in each irrigation zone. To improve the comprehensiveness of humidity detection, 3 soil moisture sensors 12 can be buried in a triangular distribution.

[0039] Specifically, the control unit 13 should be equipped with a wireless communication module. The control unit 13 can receive the wireless signals sent by the soil moisture sensor 12 and the water level sensor 6, and perform wireless communication control on the irrigation water pump 8 and the two-way water pump 7.

[0040] As Figure 5 As shown, the usage method of the present invention is as follows: Rainwater collection and intelligent storage: When it rains, rainwater enters the water collection tank 3 through the rainwater collector 9 at the top of the water collection tank 3. The rainwater in the water collection tank 3 is transported to the water storage tank 2 through the water diversion pipe 4. When the water level in the water storage tank 2 exceeds the upper limit, the control unit 13 controls the two-way water pump 7 to transport the water to the reservoir 1 for storage to ensure that the stored water does not overflow. When the water level of the water collecting tank 3 drops due to irrigation or other reasons, since the water levels of the water storage tank 2 and the water collecting tank 3 rise and fall synchronously, when the water level of the water storage tank 2 synchronously drops below the set minimum water level, the control unit 13 controls the two-way water pump 7 to pump water from the reservoir 1 to supplement the water storage tank 2, raising the water level of the water storage tank 2 and consequently raising the water levels of the water collecting tanks 3, so that the water levels of the water collecting tanks 3 are always maintained within the set range, ensuring continuous water supply during irrigation.

[0041] Drought monitoring and intelligent drip irrigation: The soil moisture sensor 12 monitors the 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. The water in the water collecting tank 3 flows through the irrigation pipe 5 and the drip irrigation pipe 6 to precisely irrigate the corresponding irrigation zone. When the moisture is higher than the set threshold, the control unit 13 shuts off the irrigation water pump 8 of the corresponding irrigation zone to stop irrigation.

[0042] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims described.

Claims

1. A drip irrigation device for rainwater recycling, characterized in that: include: Three-stage water storage unit, water delivery network and automatic control unit; The three-stage water storage unit comprises a water reservoir (1), a water storage tank (2) and a plurality of water collecting tanks (3); a rainwater collector (9) is provided on the top of the water collecting tank (3); the water storage tank (2) is connected to the water reservoir (1) via a two-way water pump (7); the plurality of water collecting tanks (3) are divided into a plurality of groups; the water collecting tanks in each group are connected in series in sequence via a water diversion pipe (4); and the water diversion pipes in each group are connected in parallel to the water storage tank (2); The water delivery network comprises a water diversion pipe (4) connecting a water storage tank (2) and a water collection tank (3), and irrigation partitions connecting each water collection tank (3), each water collection tank (3) being connected to two irrigation partitions, the irrigation partitions comprising an irrigation water pump (8), an irrigation pipe (5) and a drip irrigation pipe (6), the irrigation pipe (5) being connected to the drip irrigation pipes (6) distributed in a grid shape via a bypass valve (17); The automatic control unit comprises a water level sensor (11) arranged in a water storage tank (2), a soil moisture sensor (12) buried in each irrigation zone, and a control unit (13) connected to the two sensors by signals; the control unit (13) is configured as follows: receiving water level data from a water level sensor (11), and when the water level in the water tank (2) exceeds a first threshold, controlling the bidirectional water pump (7) to discharge water into the water reservoir (1); and when the water level in the water tank (2) is lower than a second threshold, controlling the bidirectional water pump (7) to pump water from the water reservoir (1) for replenishment; The humidity data from the soil humidity sensor (12) is received, and when the humidity is lower than a set value, the irrigation water pump (8) of the corresponding irrigation zone is started to perform drip irrigation until the humidity reaches a set threshold.

2. The device according to claim 1, characterized in that The bottom of the water storage tank (2) and each water collecting tank (3) are located at the same horizontal plane, and the connection interface between the water diversion pipe (4) and the water storage tank (2) is located at the lower part of the side wall of the water storage tank (2), which is lower than the lowest water level line of the water storage tank (2), so that the water level of the water storage tank (2) and the water collecting tank (3) rises and falls synchronously.

3. The device according to claim 2, characterized in that The rainwater collector (9) comprises a detachable rainwater grid frame (91) and a rainwater collection tube (92) embedded therein; the lower part of the side wall of the water collecting tank (3) is provided with horizontally aligned interfaces, which are respectively connected to the water diversion pipe (4) and the irrigation water pump (8); and the water suction port of the irrigation water pump (8) is located below the lowest water level line of the water collecting tank (3).

4. The device according to claim 1, characterized in that A second water tank interface (71) is provided at the connection interface between the bidirectional water pump (7) and the water storage tank (2), and a third water tank interface (81) is provided at the connection interface between the irrigation water pump (8) and the water collection tank (3). Both the second water tank interface (71) and the third water tank interface (81) are provided with filter screens for intercepting sediment.

5. The device according to claim 1, characterized in that The drip irrigation pipe (6) is a PE pipe, the buried depth of the drip irrigation pipe (6) is 10-30 cm, and is evenly distributed in a grid shape in each irrigation zone, and the drip irrigation pipe and the soil moisture sensor are buried near the plant root layer.

6. The device according to claim 1, characterized in that The control unit (13) is connected to the water level sensor (11), the soil moisture sensor (12), the two-way water pump (7) and the irrigation water pump (8) via a wireless communication module to achieve remote monitoring and command issuance.

7. The device according to claim 1, characterized in that The volume of the water storage tank (2) is greater than the volume of a single water collecting tank (3), and the volume of each water collecting tank (3) is configured according to the area of ​​the connected irrigation zone and the water demand of the plants.

8. The device according to claim 1, characterized in that The water reservoir (1), water storage tank (2) and water collection tank (3) are all buried in the soil (15), with their tops below the ground surface; the water diversion pipe (4) and irrigation pipe (5) are buried horizontally in the soil at the same level.

9. A method for implementing a drip irrigation device for rainwater recycling, characterized in that: The device according to any one of claims 1 to 8 comprises the following steps: S1. Rainwater collection: When it rains, rainwater enters the water collecting tank (3) through the rainwater collector (9) at the top of the water collecting tank (3), and is transported to the water storage tank (2) through the water diversion pipe (4); S2. Water level control: when the water level of the water storage tank (2) exceeds a first threshold, the bidirectional water pump (7) is controlled to deliver water to the water storage tank (1); when the water level of the water storage tank (2) is lower than a second threshold, the bidirectional water pump (7) is controlled to pump water from the water storage tank (1) for replenishment; S3. Intelligent irrigation: When the soil moisture sensor (12) detects that the humidity is lower than the set value, the irrigation water pump (8) of the corresponding irrigation zone is started to draw water from the water collection tank (3) through the drip irrigation pipe (6) for irrigation until the humidity reaches the set threshold.

10. The method according to claim 9, characterized in that In step S2, the water levels of the water storage tank (2) and the water collecting tank (3) are synchronously raised and lowered via the water diversion pipe (4).

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