A rainwater deep irrigation system

Abstract

A rainwater deep irrigation system, comprising a water storage tank, the water storage tank is provided with two water outlets of high and low, the low water outlet of the water storage tank is provided with a primary filter, the high water outlet is connected with a water diversion pipe, the water diversion pipe is connected with a drainage ditch; the low water outlet is connected with an above-ground water guide pipe provided with a fine filter, the above-ground water guide pipe is connected with a deep water permeable pipe provided with water permeable holes through an underground water guide pipe; the water storage tank is arranged on a roof, a wall top, a hillside, a hilltop or a specially-built supporting column. The rainwater is recycled and utilized for deep irrigation underground, the underground water level is improved, the system is not prone to blockage, underground water pollution is less, and operation energy consumption is low.

Description

Technical Field

[0001] This utility model relates to a rainwater harvesting and utilization equipment and facilities, and more particularly to a deep rainwater irrigation system for raising the groundwater level. Background Technology

[0002] Currently, there is limited human intervention in rainwater recycling. Of the rainwater falling on land, a portion is absorbed by the shallow surface soil and vegetation, and some is intercepted by lakes, ponds, reservoirs, and hydroelectric power stations; most flows into the sea through rivers. The more abundant and denser the vegetation on the surface, the more rainwater it absorbs. Bare, unvegetated surfaces absorb very little rainwater, making them highly susceptible to soil erosion. The Yellow River becoming a "suspended river" is due to the abundance of barren mountains and ridges in its middle and upper reaches, resulting in the large amounts of sand and soil flowing into the river.

[0003] Rainwater harvesting is an economical and practical way of developing and utilizing water resources. It can save water for domestic use and industrial and agricultural production, reduce water and sewage fees, prevent waterlogging, and improve the ecological environment, thus having good economic and environmental benefits.

[0004] Currently, typical rainwater harvesting and utilization systems consist of a diversion and filtration system, a water storage system, and a purification system. Specifically, it is a complete system including a series of rainwater collection, treatment, and utilization equipment such as rainwater diversion devices, safe rainwater diversion wells, PP rainwater collection modules, intercepting baskets, and pipe networks.

[0005] Existing rainwater harvesting and reuse systems can be broadly categorized into two types based on the source of the rainwater: (1) Rooftop rainwater harvesting: Rooftop rainwater is relatively clean, with fewer impurities, silt, and other pollutants. It can be directly discharged into a storage system for treatment after diversion and simple filtration; (2) Ground rainwater harvesting: Ground rainwater contains more impurities and has more complex pollution sources. After diversion and rough filtration, it must be settled before being introduced into a storage system. Based on the amount of rainwater stored, the purified rainwater is pumped to various water usage points, such as green belt water replenishment, landscape water replenishment, fire fighting water, car washing water, etc.

[0006] Currently, in many places, due to the decline in groundwater levels, irrigation wells for rural crops are being dug deeper and deeper, and in some areas, there is no groundwater available. Grasslands are withering, urban foundations are sinking, buildings are tilting and becoming dangerous structures, and seawater is flowing back into the ground. Therefore, utilizing rainwater to replenish groundwater resources and raise the groundwater level is of great significance.

[0007] Currently, rainwater recharge of groundwater resources mainly adopts the "first collection and storage - then purification - then recharge" model, which can be roughly divided into artificial recharge method and surface infiltration method. Artificial recharge method is to directly inject rainwater into the aquifer through engineering measures, thereby realizing the comprehensive utilization of rainwater resources and groundwater resources, and promoting the restoration of damaged hydrogeological environment. Generally, groundwater recharge is achieved by building storage pools and recharge wells. Existing domestic and foreign recharge engineering surveys show that serious blockage problems are encountered in the recharge process, which is also a key factor limiting the widespread application of artificial groundwater recharge technology in engineering practice. At the same time, the physical mixing effect in the process of directly injecting rainwater into the aquifer during artificial recharge will affect the groundwater quality. Surface infiltration recharge of groundwater is mainly based on natural infiltration, which has high requirements for site permeability and a long cycle (see "Research Progress on Urban Rainwater Recharge of Groundwater Utilization", Yang Pengfei et al., People's Pearl River, 2025, 46(4); 76-82). Utility Model Content

[0008] The technical problem to be solved by this utility model is to provide a rainwater deep irrigation system for raising the groundwater level that is not prone to clogging, causes less pollution to groundwater, and has low operating energy consumption.

[0009] The technical solution adopted by this utility model to solve its technical problem is as follows: a deep rainwater irrigation system, including a water storage tank, which has two outlets, one high and one low. Both outlets are equipped with primary filters. The high outlet is connected to a water inlet pipe, which is connected to a drainage ditch. The low outlet is connected to an above-ground water pipe equipped with a fine filter. The above-ground water inlet pipe is connected to a deep permeable pipe with permeable holes via an underground water inlet pipe. During operation, water in the water storage tank sequentially passes through the low outlet with the primary filter, the above-ground water inlet pipe, the fine filter, the underground water inlet pipe, the deep permeable pipe, and the permeable holes into the deep underground. When the water level in the water storage tank is higher than that of the high outlet, the excess water flows out from the high outlet, enters the water inlet pipe, and then flows into the drainage ditch.

[0010] The reservoir is located on rooftops, wall tops, hillsides, mountaintops, or on specially constructed support columns, primarily for collecting and storing rainwater. When the collected and stored rainwater is insufficient but groundwater replenishment is urgently needed, river water, lake water, etc., can also be pumped in as a supplementary water source.

[0011] By placing water storage tanks on rooftops, walls, hillsides, mountaintops, or on specially constructed supporting columns, the potential energy of the water can be used to pressurize the water into the deep underground, saving operating energy consumption.

[0012] Furthermore, the vertical distance between the upper permeable hole of the deep permeable pipe and the ground surface is ≥20 meters.

[0013] Furthermore, the fine filter can be installed at the outlet end of the ground water pipe or at any location on the ground water pipe.

[0014] Furthermore, a cleaning device is installed at the top of the deep permeable pipe to clean up the accumulated garbage in the deep permeable pipe.

[0015] Furthermore, the permeable holes are inclined outwards and upwards from the inner wall of the deep permeable pipe. This arrangement prevents sand and soil around the pipe from entering the permeable holes when the deep permeable pipe is inserted into the ground, thus preventing blockage.

[0016] Furthermore, the inclination angle of the permeable hole is 5 to 60 degrees; preferably 15 to 45 degrees.

[0017] Furthermore, the diameter of the permeable hole is 1 to 10 mm; preferably 4 to 8 mm.

[0018] Furthermore, the distance (hole spacing) between two adjacent permeable holes is 3 to 20 millimeters, preferably 5 to 15 millimeters.

[0019] Furthermore, the number of permeable holes is preferably 20 to 1000; more preferably 100 to 800.

[0020] Furthermore, the deep permeable pipes are generally made of concrete or metal; plastic or ceramic pipes can also be used. When encountering hard rock strata on the surface, drilled holes can be used instead of deep permeable pipes.

[0021] Furthermore, a disinfection and sterilization device is installed on the above-ground water pipe to kill microorganisms, viruses, and pathogens, thereby reducing microbial contamination of deep groundwater.

[0022] The water storage tank can be connected to a water pump via a water supply pipe. The water pump's inlet end is connected to a water supply tank via an inlet pipe and a water pump inlet filter to supply water to the water storage tank.

[0023] This utility model of deep rainwater irrigation system utilizes the water level difference pressure of a high-level water storage tank to press filtered, disinfected, and sterilized water into the deep underground layers through the permeable holes of the water guide pipe and deep permeable pipe. The deep underground layers have a large water capacity, which is much greater than the water absorption capacity of shallow seepage. It is also technically feasible to use a high-pressure water pump to directly pressurize water into the deep ground, but the energy consumption is much higher.

[0024] Compared with existing technologies, this utility model has the following beneficial effects: ①. Since the deep irrigation rainwater undergoes multiple filtration and purification processes, it contains very few impurities, thus reducing the likelihood of clogging the deep permeable pipes; in the preferred embodiment, the permeable holes are inclined upwards from the inside out, preventing mud and sand from entering the deep permeable pipes during pipe insertion, further reducing the chance of clogging; in addition, in the preferred embodiment, the cleaning device ensures that even if the deep permeable pipes become clogged, the clogging mud and debris can be removed promptly, resolving the clogging problem; ②. By placing the reservoir on rooftops, wall tops, hillsides, mountaintops, or on specially constructed support columns, the potential energy of the water can be used to pressurize the water into the deep underground, saving operating energy consumption; ③ In the preferred embodiment, the installation of a disinfection and sterilization device ensures that the water entering the deep underground will not cause microbial contamination of the groundwater. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0026] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of Embodiment 3 of this utility model;

[0028] Figure 4 This is a structural schematic diagram of Embodiment 4 of the present invention.

[0029] In the diagram: 1-Deep permeable pipe, 101-Permeable hole, 102-Cleaning device, 2-Underground water pipe, 3-Fine filter, 4-Above-ground water pipe, 5-Primary filter, 6-Water intake pipe, 7-Building, 8-Drainage ditch, 9-Foundation, 10-Reservoir, 1001-Support column, 11-Water pump, 1101-Water delivery pipe, 1102-Water pump inlet filter, 1103-Inlet pipe, 12-Water supply pool, 13-Disinfection and sterilization device, 14-Mountain. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] Example 1

[0032] Reference Figure 1This embodiment includes a deep permeable pipe 1, an underground water pipe 2, a fine filter 3, an above-ground water pipe 4, a primary filter 5, a water intake pipe 6, a drainage ditch 8, and a water storage tank 10. The water storage tank 10 is located on the roof of the building 7 and is used to collect and store rainwater. The water storage tank 10 has two outlets, one high and one low, both of which are equipped with primary filters 5. The higher outlet is connected to the water intake pipe 6. The drainage ditch 8 is located on the ground or underground and is connected to the drainage system. When the water level in the water storage tank 10 is too high, excess water is discharged. Water flows from the high-level outlet into the water inlet pipe 6, and then into the drainage ditch 8. The low-level outlet connects to the above-ground water pipe 4. Both the above-ground water pipe 4 and the water inlet pipe 6 are installed close to the wall of the building 7. The upper end of the above-ground water pipe 4 is connected to the primary filter 5, and the lower end is connected to the fine filter 3. The fine filter 3 is then connected to the deep permeable pipe 1 through the underground water pipe 2 and the cleaning device 102. The deep permeable pipe 1 has permeable holes 101, which are inclined upwards at 45 degrees from the inner wall to the outer wall, with a diameter of 4-5 mm. The quantity is 80-100 units; the vertical height of the lower end of the deep permeable pipe 1 from the ground surface is 20-500 meters, depending on the specific underground geological structure. It should be selected in strata with many pores and high permeability. A cleaning device 102 is installed at the upper end of the deep permeable pipe 1 to clean the garbage accumulated in the deep permeable pipe 1. The deep permeable pipe 1 should not be buried under the underground of building 7 or under the foundation of other important buildings (high-rise buildings, bridge piers, tunnels, etc.) to avoid foundation deformation; of course, if it exceeds a certain depth or does not cause deformation in the test, it can be buried under important buildings; this implementation plan has a significant improvement on disasters such as urban foundation subsidence, groundwater level drop, and seawater intrusion; due to the drop in groundwater level, some lakes, reservoirs, ponds and other water storage systems in and around the city are very easy to dry up. In order to prevent the water system from drying up, a method of setting a waterproof layer at the bottom of the water system is adopted. This method blocks the exchange between the water system and groundwater, which will accelerate the deterioration of the water body, which is costly and counterproductive. The implementation plan can effectively solve the problem of water system drying up.

[0033] Implement the second-to-last step

[0034] Reference Figure 2 This embodiment includes a deep permeable pipe 1, an underground water pipe 2, a fine filter 3, an above-ground water pipe 4, a primary filter 5, and a water storage tank 10. The water storage tank 10 is located at the upper end of the support column 1001. A water permeable hole 101 is opened at the lower end of the deep permeable pipe 1, and a cleaning device 102 is installed at the upper end. The deep permeable pipe 1 is connected to the lower outlet of the water storage tank 10 through the cleaning device 102, the above-ground water pipe 2, the fine filter 3, the above-ground water pipe 4, and the primary filter 5. The structure and installation of the deep permeable pipe 1 are the same as in embodiment 1.

[0035] Example 3

[0036] Reference Figure 3This embodiment includes a deep permeable pipe 1, an underground water pipe 2, a fine filter 3, an above-ground water pipe 4, a primary filter 5, a water storage tank 10, a water pump 11, and a water supply tank 12. The scheme of embodiment 2 can only receive rainwater. This embodiment adds a water supply system to the basis of embodiment 2, that is, installs a water pump 11. The outlet of the water pump 11 is connected to the water storage tank 10 through a water delivery pipe 1101. The inlet of the water pump 11 is connected to the water supply tank 12 through an inlet pipe 1103 and a water pump inlet filter 1102. The water in the water supply tank 12 is pumped to the water storage tank 10. The water source of the water supply tank 12 includes not only rainwater, but also purified river and lake water, and reclaimed water purified by a water treatment plant, etc. Other aspects are the same as those in embodiment 2.

[0037] Example 4

[0038] Reference Figure 4 This embodiment includes a deep permeable pipe 1, an underground water pipe 2, a fine filter 3, an above-ground water pipe 4, a primary filter 5, a water storage tank 10, and a disinfection and sterilization device 13. The water storage tank 10 is located at an appropriate position on the top, slope, or waist of the mountain 14. The disinfection and sterilization device 13 is installed on the underground water pipe 2 or the above-ground water pipe 4 to kill viruses, pathogens, and other toxic and harmful substances in the water. Other aspects are the same as in embodiment 2.

[0039] The above description is only a preferred embodiment of the present utility model and does not limit the scope of protection of this application. All equivalent changes made in accordance with the structure, shape, principle, etc. of this application are covered within the scope of protection of this application.

Claims

1. A deep rainwater irrigation system, comprising a water storage tank, wherein the water storage tank is provided with two outlets, one high and one low, characterized in that, The water storage tank has a primary filter at its low outlet and a water inlet pipe at its high outlet, which is connected to a drainage ditch. The low outlet is connected to an above-ground water pipe with a fine filter, which is connected to a deep permeable pipe with permeable holes via an underground water pipe. The water storage tank is located on a roof, wall, hillside, mountaintop, or on a specially constructed support column.

2. The deep irrigation system for rainwater according to claim 1, characterized in that, The upper permeable hole of the deep permeable pipe is at a vertical distance of ≥20 meters from the ground surface.

3. A deep rainwater irrigation system according to claim 1 or 2, characterized in that, The fine filter is installed at the outlet end of the ground-level water pipe.

4. A deep rainwater irrigation system according to claim 1 or 2, characterized in that, A cleaning device is installed at the top of the deep permeable pipe.

5. A deep rainwater irrigation system according to claim 1 or 2, characterized in that, The permeable holes are inclined outward and upward from the inner wall of the deep permeable pipe.

6. A deep rainwater irrigation system according to claim 5, characterized in that, The inclination angle of the permeable holes is 5 to 60 degrees.

7. A deep rainwater irrigation system according to claim 1 or 2, characterized in that, The diameter of the permeable hole is 1 to 10 mm.

8. A deep rainwater irrigation system according to claim 1 or 2, characterized in that, The distance between two adjacent perforations is 3 to 20 millimeters.

9. A deep rainwater irrigation system according to claim 1 or 2, characterized in that, The number of permeable holes is 20 to 1000.

10. A deep rainwater irrigation system according to claim 1 or 2, characterized in that, The above-ground water pipe is equipped with a disinfection and sterilization device.

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