Arresting, lifting, storage and supplement four-in-one rainwater collection and supplementary irrigation system for dry farmland

Abstract

The invention discloses a blocking, lifting, storing and supplementing four-in-one rainwater collecting and supplementing system for a dry farmland, which relates to the field of irrigation and comprises a water blocking unit, a photovoltaic power generation water lifting unit, a high-level water storage unit and an irrigation and water supplementing unit, the water retaining unit comprises a dam arranged in a ditch and is used for intercepting and storing constant water flow or seasonal water flow of a river channel and supplying water to the irrigation water supplementing unit for irrigation; the photovoltaic power generation water lifting unit comprises a photovoltaic power generation assembly and a water pump water lifting assembly, the photovoltaic power generation assembly is used for converting solar energy into electric energy, and the water pump water lifting assembly is used for transferring water stored in the water blocking unit to the high-position water storage unit through a water pump and a water pipe which communicate with each other; the high-position water storage unit comprises a water storage container located at the high position and is used for water supply of the irrigation water supplementing unit for irrigation. The water retaining unit, the photovoltaic power generation water lifting unit, the high-position water storage unit and the irrigation water supplementing unit are combined with one another, water retaining, water lifting, water storage and irrigation are integrated, and the utilization rate of rainwater resources can be remarkably increased.

Description

Technical Field

[0001] The present invention relates to the field of irrigation, and in particular to a four-in-one rainwater collection and irrigation system for dryland farmland, which includes interception, extraction, storage and replenishment. Background Art

[0002] First, in arid regions, precipitation is typically concentrated in specific seasons, with minimal precipitation in other seasons. The utilization rate of rainwater from high-precipitation seasons is very low, making traditional canal irrigation ineffective for crop irrigation during water-scarce seasons. Therefore, improving the utilization rate of rainwater resources is a key issue addressed by this proposal. Secondly, in mountainous areas without national power grid coverage, promoting a "four-in-one" rainwater harvesting and irrigation technology is of great significance: first, it overcomes power constraints by enabling "non-electricity irrigation" through photovoltaic power generation and gravity flow; second, it reduces construction costs by 60%, with an investment of approximately 2,500 yuan per mu and a payback period of 2-3 years; third, it utilizes natural elevation differences for gravity irrigation, adapting to complex terrain; and fourth, it reduces pollution and groundwater extraction, combating desertification. Summary of the Invention

[0003] To address the above technical issues, the present invention provides a four-in-one rainwater collection and irrigation system for dryland farmland. This system integrates four units: a water interception unit, a photovoltaic power generation water extraction unit, a high-level water storage unit, and an irrigation and water replenishment unit. This system integrates water interception, water extraction, water storage, and irrigation, significantly improving the utilization rate of rainwater resources.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a four-in-one rainwater collection and irrigation system for dryland farmland interception, extraction, storage and replenishment, including a water interception unit, a photovoltaic power generation and water extraction unit, a high-level water storage unit and an irrigation and water replenishment unit.

[0005] The water-blocking unit includes a dam (ground dam) set on the river ditch, a water intake corridor or a water filtration well set on the seasonal river channel, etc., which is used to store water and supply water to the irrigation and water replenishment unit for irrigation.

[0006] The photovoltaic power generation and water pumping unit includes a photovoltaic power generation component and a water pump water pumping component. The photovoltaic power generation component is used to convert solar energy into electrical energy to drive the water pump to pump water so that it can be used immediately. The water pump water pumping component is used to transfer the water stored in the water blocking unit to the high-level water storage unit through interconnected water pumps and water pipes.

[0007] The high-level water storage unit includes a large open hot-melt polymer fabric anti-seepage and anti-evaporation water storage container located at the top of the field, a PE expandable assembled water storage container, and a corrugated steel plate assembled water storage container, which are used to store water and supply water to the irrigation and water replenishment unit for irrigation.

[0008] The system consists of a water-blocking unit, a photovoltaic power generation and water pumping unit, a high-level water storage unit, and an irrigation and water replenishment unit. The water-blocking unit intercepts and stores rainwater and floodwater, the photovoltaic power generation and water pumping unit generates and pumps water, the high-level water storage unit stores water at a high level, and the irrigation and water replenishment unit replenishes water, achieving efficient utilization of rainwater and floodwater resources through coordinated multi-channel approaches.

[0009] Preferably, the photovoltaic power generation and water pumping unit includes a photovoltaic power generation component and a water pump water pumping component. The photovoltaic power generation component is used to convert solar energy into electrical energy to drive the water pump to pump water so that it can be used immediately. The water pump water pumping component is used to transfer the water stored in the water intercepting unit to the high-level water storage unit through interconnected water pumps and water pipes.

[0010] Preferably, the PE expandable assembled container is a plurality of PE water storage tanks buried below the soil layer, and the PE water storage tanks are interconnected, so as to facilitate capacity expansion, reduce evaporation, and store water during the winter.

[0011] Preferably, the large open hot-melt polymer fabric anti-seepage and anti-evaporation water storage container is a water reservoir, and the water reservoir is provided with an anti-evaporation device, which can significantly reduce evaporation.

[0012] Preferably, the large-scale open hot-melt polymer fabric anti-seepage and anti-evaporation water storage tank anti-evaporation device of the "four-in-one" rainwater collection and irrigation system includes a floating module and a hot-melt polymer fabric base cloth. The floating module refers to floating on the liquid surface of the water body in the water storage tank. Each of the floating modules is wrapped with a hot-melt polymer fabric and fixed to the hot-melt polymer fabric base cloth laid above by hot-melt welding. The hot-melt polymer fabric is supported by each of the floating modules on the liquid surface of the water storage tank. Each of the floating modules is arranged at a certain interval. The floating module is wrapped with a hot-melt polymer fabric and then fixed to the hot-melt polymer fabric base cloth by hot-melt welding on all sides.

[0013] Preferably, the hot-melt polymer fabric base cloth is provided with a plurality of plum blossom-shaped drainage holes, through which rainwater and melted snow water are discharged downward into the water reservoir.

[0014] Preferably, the bottom and the water-facing surface of the water storage tank are provided with a hot-melt polymer fabric anti-seepage liner to reduce water penetration into the soil layer.

[0015] Preferably, the irrigation and water replenishment unit includes a pipe and a sub-membrane drip irrigation device. One end of the pipe is connected to the high-level water storage unit, and the other end of the pipe is connected to the sub-membrane drip irrigation system, which is installed in the field. Using the existing mature sub-membrane drip irrigation system can significantly improve the irrigation water utilization rate.

[0016] Preferably, the irrigation and water replenishment unit includes a field irrigation system connected to the pipeline, and the connected pipeline is buried underground. The use of existing mature irrigation devices can significantly improve the irrigation utilization rate of water.

[0017] Advantages of the present invention:

[0018] This solution combines four units: a water interception unit, a photovoltaic power generation water pumping unit, a high-level water storage unit, and an irrigation water replenishment unit. It integrates water interception, water pumping, water storage, and irrigation. Firstly, it can significantly improve the utilization rate of rainwater resources. Secondly, it explores a new model of agricultural irrigation in mountainous areas without power grid coverage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only four of the drawings of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is a schematic diagram of the "four-in-one" rainwater collection and irrigation system for dryland farmland;

[0021] Figure 2 Schematic diagram of Example 1 of the present invention;

[0022] Figure 3 This is a schematic diagram of a water storage container according to embodiment 2 of the present invention;

[0023] Figure 4 This is a schematic diagram of a water storage container according to embodiment 3 of the present invention;

[0024] Among them, 1. Water interception unit; 2. Photovoltaic power generation and water pumping unit; 3. High-level water storage unit; 31. Water reservoir; 32. Floating module; 33. Hot-melt polymer fabric; 34. PE water storage tank; 4. Irrigation water replenishment unit. DETAILED DESCRIPTION

[0025] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The embodiments are only used to explain the present invention and do not limit the scope of protection of the present invention.

[0026] Example 1

[0027] like Figure 1 and Figure 2 As shown, the four-in-one rainwater collection and irrigation system for dryland farmland interception, extraction, storage and replenishment includes a water interception unit 1, a photovoltaic power generation water extraction unit 2, a high-level water storage unit 3 and an irrigation water replenishment unit 4.

[0028] The water interception unit 1 has various forms, including dams set in the ditch, which are used to store water and supply water to the irrigation water replenishment unit 4 for irrigation. Ditch dams, interception subsurface flow and other methods are used to intercept and store rainwater resources to the greatest extent. Ditch dams can utilize existing silt dams, rolling dams and pond dams in the ditch. If newly built, safety design and verification procedures such as flood control and stability are required. The interception subsurface flow is generally composed of a cutoff wall, a water collection corridor, and a water filtration well. The cutoff wall should be determined according to local materials, the amount of water diverted, and the technical and economic conditions of construction. It is mostly made of rammed clay, and can also be built with mortar block stone or concrete. The cutoff wall should be built on an impermeable layer. The thickness is determined by the size of the water head, and the bottom and top should be greater than 1m. The water collection capacity of the interception subsurface flow can be calculated according to whether there is surface runoff on the riverbed.

[0029] The photovoltaic power generation and water pumping unit 2 includes a photovoltaic power generation component and a water pump water pumping component. The photovoltaic power generation component is used to convert solar energy into electrical energy to drive the water pump to pump water so that it can be used immediately. The water pump water pumping component is used to transfer the water stored in the water blocking unit to the high-level water storage unit through interconnected water pumps and water pipes.

[0030] According to the kinetic energy requirements for water pumping, several photovoltaic panels are configured to form a photovoltaic array to drive the photovoltaic water pump. The microprocessor in the inverter continuously monitors the photovoltaic power level and adjusts the frequency of the photovoltaic water pump to achieve zero-electricity-cost water pumping in areas without power transmission and distribution. The photovoltaic inverter must meet the kinetic energy requirements of the photovoltaic water pumping unit to prevent breakdown. The annual sunshine hours at the location where the photovoltaic power generation water pumping system is laid should be no less than 1600 hours, and the annual total solar radiation should be no less than 1000kW·h / (m 2 a) Ability to withstand the maximum wind speed once in 50 years.

[0031] The high-level water storage unit 3 includes a large open hot-melt polymer fabric anti-seepage and anti-evaporation water storage container located at the top of the field, a PE expandable assembled water storage container and a corrugated steel plate assembled water storage container, which are used to store water and supply water to the irrigation and water replenishment unit 4 for irrigation.

[0032] The system consists of a water-blocking unit 1, a photovoltaic power generation and water pumping unit 2, a high-level water storage unit 3, and an irrigation and water replenishment unit 4. The system uses the water-blocking unit 1 to block and store rainwater, the photovoltaic power generation and water pumping unit 2 to generate electricity and pump water, the high-level water storage unit 3 to store water, and the irrigation and water replenishment unit 4 to replenish water, thus achieving efficient utilization of rainwater resources through multiple coordinated approaches.

[0033] Example 2

[0034] Combine Figure 3 As shown, compared with Example 1, this embodiment also includes the following features: the water storage container adopts a water reservoir 31, and the water reservoir 31 is provided with an anti-seepage and anti-evaporation device, which can significantly reduce the leakage loss and evaporation loss of the water reservoir.

[0035] 4. The evaporation prevention device includes floating modules 32 and a heat-melting polymer fabric 33. The floating modules 32 float on the surface of the water in the reservoir 31. Each floating module 32 is wrapped with a heat-melting polymer fabric and fixed to the heat-melting polymer fabric 33 base fabric laid above it via heat-melting welding. The heat-melting polymer fabric 33 is supported by each floating module 32 above the surface of the water in the reservoir 31. The floating modules 32 are arranged at regular intervals and wrapped with the heat-melting polymer fabric 33. The heat-melting polymer fabric 33 is then welded to the heat-melting polymer fabric 33 base fabric via heat-melting welding. The floating modules 32 support the heat-melting polymer fabric 33 at the surface of the water, significantly reducing water evaporation from the reservoir 31. Reservoirs are typically located on undisturbed soil foundations. The excavation pit is excavated according to the principle of cut-and-fill balance, and the reservoir body is in the shape of an inverted trapezoid. When the soil foundation is medium- to strong-collapse loess, measures such as pre-settlement by immersion in water are adopted.

[0036] The hot-melt polymer fabric base fabric 33 is provided with a plurality of plum blossom-shaped drainage holes. Rainwater can be drained downward into the reservoir 31 through the drainage holes. The aperture and density of the openings are determined according to local rainfall, and the maximum aperture is not more than 50 mm.

[0037] The bottom and water-facing surface of the water storage tank 31 are provided with a hot-melt polymer fabric anti-seepage liner, which can reduce water penetration into the soil layer.

[0038] Example 3

[0039] Combine Figure 4 Compared to Example 1, this embodiment also features the following: the water storage containers are multiple PE water tanks 34 buried below the soil layer, interconnected in series or parallel. This facilitates capacity expansion, allows for winter water storage, and reduces evaporation.

[0040] Example 4

[0041] Compared to Example 1, this embodiment also features the following: the irrigation and water replenishment unit 4 includes a pipe and a sub-membrane drip irrigation device. One end of the pipe is connected to the high-level water storage unit 3, and the other end of the pipe is connected to the sub-membrane drip irrigation system, which is installed in the field. Using existing, mature sub-membrane drip irrigation devices and small-tube outflow irrigation methods can significantly improve irrigation water utilization.

[0042] Example 5

[0043] Compared to Example 1, this embodiment further includes the following features: the irrigation and water replenishment unit includes a field irrigation system connected to the pipeline, and the connected pipeline is buried underground. Using existing mature irrigation equipment can significantly improve the irrigation utilization rate of water.

[0044] Advantages of the present invention:

[0045] This solution combines four units: a water interception unit 1, a photovoltaic power generation water pumping unit 2, a high-level water storage unit 3, and an irrigation water replenishment unit 4. It integrates water interception, water pumping, water storage, and irrigation. Firstly, it can significantly improve the utilization rate of rainwater resources. Secondly, it explores a new model of agricultural irrigation in mountainous areas without power grid coverage.

[0046] The high-level water storage module uses a floating anti-evaporation structure, covering the water in the pool to reduce water evaporation loss. The membrane is provided with small leakage holes, and the opening density of the membrane meets the following requirements: opening area ratio = (annual evaporation / annual precipitation) × adjustment coefficient K, where 0.1≤K≤0.15.

[0047] The intelligent irrigation module consists of an underground water pipe network, a field irrigation system, and automatic control facilities. The buried depth H of the underground water pipe network satisfies the following conditions: H = 0.4D + Δh, where D is the depth of the crop taproot layer and Δh is the permafrost correction value.

[0048] Specific examples:

[0049] Case 1 (a millet-growing area):

[0050] (1) Construction parameters: 500 mu of millet planting, 7000m 3 Hot-melt polymer fabric anti-seepage and anti-evaporation high-level water storage tank + 18.5kW photovoltaic array.

[0051] (2) Irrigation mode: drip irrigation under the film during the seedling stage, 5m 3 / mu, supplementary irrigation 10m 3 / mu.

[0052] (3) Implementation effect: per mu yield increased by 159.8%, water use efficiency (WUE) increased by 2.1kg / m 3 .

[0053] Case 2 (an apple orchard):

[0054] (1) Use microporous ceramic root irrigation (buried at a depth of 35 cm) combined with intelligent soil moisture monitoring.

[0055] (2) During the fruit expansion period, dynamic irrigation is implemented, 0.05m each time 3 / strain.

[0056] (3) Implementation effect: increased production by 24.0% and saved water by 37%.

[0057] Technical Effects

[0058] 1. Economic benefits: Compared with traditional irrigation projects, the average investment per mu is reduced by 40-50%; the yield of grain crops increases by 63.6%-159.8%, and the yield of economic forestry and fruit trees increases by 10%-24%.

[0059] 2. Ecological benefits: Reduce carbon emissions (replacing diesel-powered or city-powered water pumping); utilize rainwater and floodwater for irrigation, reduce groundwater extraction, and protect groundwater ecology; increase the resource utilization rate of rainwater and floodwater by 58%.

[0060] 3. Adaptability: Suitable for areas with annual precipitation of 300-650mm, and compatible with seasonal drought areas in the southwest.

[0061] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. The four-in-one rainwater collection and irrigation system for dryland farmland is characterized by: It comprises a water interception unit (1), a photovoltaic power generation water pumping unit (2), a high-level water storage unit (3) and an irrigation water replenishment unit (4); The water-blocking unit (1) includes a dam set in a river ditch or a water intake corridor or a water filtration well set in a ground dam or a seasonal river channel, which is used to store water and supply water to the irrigation and water replenishment unit (4) for irrigation; The photovoltaic power generation and water pumping unit (2) comprises a photovoltaic power generation component and a water pump water pumping component. The photovoltaic power generation component is used to convert solar energy into electrical energy to drive the water pump to pump water, so that water can be used immediately. The water pump water pumping component is used to transfer the water stored in the water interception unit (1) to the high-level water storage unit (3) through the interconnected water pump and water pipe. The high-level water storage unit (3) comprises a large open hot-melt polymer fabric anti-seepage and anti-evaporation water storage container located at a high position of the field, a PE expandable assembled water storage tank and a corrugated steel plate assembled water storage container, which are used for storing water and supplying water to the irrigation and water replenishment unit (4) for irrigation.

2. The four-in-one rainwater collection and irrigation system for dryland farmland according to claim 1 is characterized by: The water storage containers are a plurality of PE water storage tanks (34) buried below the soil layer, and the PE water storage tanks (34) are interconnected in series or parallel.

3. The four-in-one rainwater collection and irrigation system for dryland farmland according to claim 1 is characterized by: The water storage container is a water reservoir (31), and the water reservoir (31) is provided with an anti-evaporation device.

4. The four-in-one rainwater collection and irrigation system for dryland farmland according to claim 3 is characterized by: The anti-evaporation device comprises a floating module (32) and a hot-melt polymer fabric (33), wherein the floating module (32) floats on the liquid surface of the water body of the water reservoir (31), each floating module (32) is wrapped with the hot-melt polymer fabric and fixed to the hot-melt polymer fabric (33) base cloth laid above by hot-melt welding, and the hot-melt polymer fabric (33) is held up by each floating module (32) on the liquid surface of the water reservoir (31), each floating module (32) is arranged at a certain interval, and the floating module (32) is wrapped with the hot-melt polymer fabric (33), and then fixed to the hot-melt polymer fabric (33) base cloth by hot-melt welding.

5. The four-in-one rainwater collection and irrigation system for dryland farmland interception, extraction, storage and replenishment according to claim 1 is characterized by: The hot-melt polymer fabric (33) base cloth is provided with a plurality of plum blossom-shaped drainage holes for infiltrating rainwater and melted snow water.

6. The four-in-one rainwater collection and irrigation system for dryland farmland according to claim 1 is characterized by: The bottom and the water-facing surface of the water storage tank (31) are provided with a hot-melt polymer fabric (33) anti-seepage liner.

7. The four-in-one rainwater collection and irrigation system for dryland farmland according to claim 1 is characterized by: The irrigation and water replenishment unit (4) comprises a pipeline and a sub-membrane drip irrigation device, one end of the pipeline is connected to the high-level water storage unit (3), and the other end of the pipeline is connected to the sub-membrane drip irrigation system, and the sub-membrane drip irrigation system is arranged in the field.

8. The four-in-one rainwater collection and irrigation system for dryland farmland according to claim 1 is characterized by: The irrigation and water replenishment unit (4) comprises a field irrigation system connected to a pipeline, and the connected pipeline is buried underground.

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