Rainwater storage and recycling system

Abstract

The present application relates to the field of rainwater storage and reuse, and particularly relates to a rainwater storage and reuse system, which comprises a planting soil layer and a calcareous sandy soil layer distributed from top to bottom; a water collecting well extending from the ground surface of the planting soil layer to the calcareous sandy soil layer is arranged in the planting soil layer and the calcareous sandy soil layer; a water storage device is arranged below the top surface of the calcareous sandy soil layer; the water storage device is communicated with the water collecting well, so that the rainwater flowing into the water collecting well is stored in the water storage device; the water storage device is provided with a gas permeable structure; when the water storage device stores rainwater, water vapor enters the calcareous sandy soil layer and the planting soil layer through the gas permeable structure. The rainwater storage and reuse system has the advantage of being capable of improving the water content of the calcareous sandy soil.

Description

Technical Field

[0001] This invention relates to the field of rainwater retention and reuse, and more specifically to rainwater storage and reuse systems. Background Technology

[0002] In some calcareous sandy soil areas, the calcareous sandy soil layer consists of a topsoil layer and a calcareous sandy soil layer. Both layers contain a large amount of calcareous sand. Calcium sand is characterized by high porosity, rapid infiltration, and poor water retention capacity. Therefore, after rainwater seeps into the calcareous sandy soil layer, it continues to penetrate downwards, making it difficult for water to remain within the calcareous sandy soil layer. This results in low water content in the topsoil layer above the calcareous sandy soil layer, leading to poor growth of surface plants.

[0003] Therefore, increasing the water content of calcareous sandy soil is an urgent problem to be solved. Summary of the Invention

[0004] The purpose of this invention is to overcome the problems existing in the prior art and provide a rainwater storage and reuse system that has the advantage of increasing the water content of calcareous sandy soil.

[0005] To achieve the above objectives, the present invention provides a rainwater storage and reuse system, comprising a planting soil layer and a calcareous sand layer distributed from top to bottom; a water collection well extending from the surface of the planting soil layer to the calcareous sand layer is provided in the planting soil layer and the calcareous sand layer; a water storage device is located below the bottom surface of the calcareous sand layer; the water storage device is connected to the water collection well so that rainwater flowing into the water collection well is stored in the water storage device; the water storage device is provided with a ventilated structure; when rainwater is stored in the water storage device, water vapor enters the calcareous sand layer and the planting soil layer through the ventilated structure.

[0006] In some embodiments, a gravel layer is provided below the calcareous sand layer, and the gravel in the gravel layer has a larger particle size than the soil particles in the calcareous sand layer; a water storage device is located in the middle of the gravel layer.

[0007] In some embodiments, the water storage device includes a plurality of water storage pipes laid horizontally and at intervals around a water collection well; the first end of the water storage pipe is connected to the water collection well, and the second end of the water storage pipe is closed and extends in a direction away from the water collection well; the water storage pipe is provided with a plurality of first vent holes for water vapor in the water storage pipe to enter the calcareous sand layer and the planting soil layer.

[0008] In some embodiments, the water storage device further includes an outer sleeve fitted over the outside of each water storage pipe, the first end of the outer sleeve being sealed to the water collection well, and the end of the outer sleeve being closed; the upper part of the outer sleeve is provided with a plurality of second vent holes for water vapor in the water storage pipe to enter the calcareous sand layer and the planting soil layer; the first vent hole is located at the upper part of the water storage pipe, and the positions of the first vent hole and the second vent hole are completely offset.

[0009] In some embodiments, the bottom end of the outer sleeve is provided with a drain hole for drainage.

[0010] In some embodiments, the second vent is provided with a perforated filter screen for preventing sediment from entering.

[0011] In some embodiments, geotextile is provided between the calcareous sand layer and the gravel layer.

[0012] In some embodiments, the sump is provided with a well filter to prevent silt from entering.

[0013] In some embodiments, the planting soil layer has a water collection pit that is recessed downward from the surface of the planting soil layer, and the wellhead of the water collection well is located on the surface of the water collection pit.

[0014] In some embodiments, an organic matter layer is provided above the planting soil layer.

[0015] Through the above technical solution, rainwater enters the collection well from the surface of the planting soil layer and flows into the water storage device. The water storage device can store water for a long time, and the water will continue to evaporate in the water storage device. The water vapor formed by evaporation will continuously enter the calcareous sand layer through the air-permeable structure, and then continue to enter the planting soil layer through the pores in the calcareous sand layer, thereby increasing the water content of the planting soil layer and the calcareous sand layer, thus increasing the water content of the entire calcareous sand layer and improving the environment for plant growth. Attached Figure Description

[0016] Figure 1 This is a longitudinal cross-sectional schematic diagram of a rainwater storage and reuse system according to an embodiment of the present invention;

[0017] Figure 2 This is a top view schematic diagram of the distribution of the water storage pipe and the outer casing in one embodiment of the present invention;

[0018] Figure 3 yes Figure 2 A cross-sectional view along the AA direction.

[0019] Explanation of reference numerals in the attached figures

[0020] 10. Planting soil layer; 20. Calcareous sandy soil layer; 30. Water collection well; 40. Water storage device; 41. Water storage pipe; 42. First ventilation hole; 43. Outer casing; 44. Second ventilation hole; 45. Drainage hole; 50. Gravel layer; 60. Organic matter layer; 70. Sandy soil layer. Detailed Implementation

[0021] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0022] like Figure 1 As shown, the present invention provides a rainwater storage and reuse system. The rainwater storage and reuse system includes a planting soil layer 10 and a calcareous sandy soil layer 20 distributed from top to bottom; a collection well 30 extending from the surface of the planting soil layer to the calcareous sandy soil layer 20 is provided in both the planting soil layer 10 and the calcareous sandy soil layer 20. A water storage device 40 is located below the bottom surface of the calcareous sandy soil layer 20; the water storage device 40 is connected to the collection well 30 to store rainwater flowing into the collection well 30; the water storage device 40 is provided with a ventilated structure; when rainwater is stored in the water storage device 40, water vapor enters the calcareous sandy soil layer 20 and the planting soil layer 10 through the ventilated structure.

[0023] Specifically, the wellhead of the collection well 30 is located at the surface of the planting soil layer 10, and the wellhead of the collection well 30 can also be flush with the surface of the planting soil layer 10 to facilitate rainwater flowing from the surface of the planting soil layer 10 into the collection well 30. The well wall of the collection well 30 is designed to be permeable, for example, the well wall can be made of cement, bricks, or stones. Therefore, not only can water at the surface of the planting soil layer 10 flow into the collection well 30, but rainwater that has seeped into the planting soil layer 10 and the calcareous sand layer 20 can also enter the collection well 30 through the well wall, thus allowing the collection well 30 to collect more rainwater. Of course, rainwater can also seep into the planting soil layer 10 and the calcareous sand layer 20 from the well wall. The collection well 30 can extend vertically downwards or extend downwards at an angle. The water storage device 40 can be installed in the calcareous sand layer 20, below the calcareous sand layer 20, or only partially below the calcareous sand layer 20. The depth of the water storage device 40 relative to the surface of the planting soil layer 10 is not limited in this invention; those skilled in the art can flexibly set it according to the construction situation. The water storage device 40 can be connected to the upper, middle, or lower section of the collection well 30; this invention is not limited. Preferably, the water storage device 40 is connected to the bottom end of the collection well 30 to ensure that as much rainwater as possible enters the water storage device 40 and to prevent water from stagnating in the collection well 30. The water storage device 40 has an internal water storage chamber to receive rainwater from the collection well 30. The water storage device 40 can be a water tank or a water container, etc.; this invention is not limited. The ventilated structure on the water storage device 40 can be used to connect the water storage chamber inside the water storage device 40 with the calcareous sand layer 20, allowing water vapor in the water storage device 40 to enter the calcareous sand layer 20. The ventilated structure can be any structure connecting the interior of the water storage device 40 and the calcareous sand layer 20; this invention is not limited in this regard. For example, the ventilated structure can be a vent hole through which water vapor can enter the calcareous sand layer 20; the ventilated structure can also be a vent pipe through which water vapor can enter the calcareous sand layer 20.

[0024] In this embodiment, rainwater enters the collection well 30 from the surface of the planting soil layer 10 and then flows into the water storage device 40. The water storage device 40 can store water for an extended period, and the water continuously evaporates within it. The resulting water vapor continuously enters the calcareous sand layer 20 through the permeable structure and then continues to enter the planting soil layer 10 through the pores in the calcareous sand layer 20, thereby increasing the water content of both the planting soil layer 10 and the calcareous sand layer 20, thus improving the overall water content of the calcareous sand layer and enhancing the environment for plant growth. Furthermore, the rainwater storage and reuse system transforms the high porosity of the calcareous sand into a usable structural advantage, fully utilizing local soil characteristics and contributing to resource conservation and environmental protection.

[0025] In some embodiments, such as Figure 1 As shown, a gravel layer 50 is provided below the calcareous sand layer 20, and the particle size of the gravel in the gravel layer 50 is larger than the particle size of the soil particles in the calcareous sand layer 20; the water storage device 40 is located in the middle of the gravel layer 50.

[0026] Specifically, the bottom of the water collection well 30 can extend into the calcareous sand layer 20, and the water storage device 40 in the gravel layer 50 is connected to the bottom of the water collection well 30 through a connecting structure; alternatively, the bottom of the water collection well 30 can also extend into the gravel layer 50, and the water storage device 40 in the gravel layer 50 is directly connected to the bottom of the water collection well 30. Preferably, the bottom of the water collection well 30 is flush with the bottom surface of the gravel layer 50, and the water storage device 40 is located in the middle of the gravel layer 50.

[0027] In this embodiment, the gravel layer 50 contains a large number of gravels. Due to the large particle size of the gravels, the gaps between them are relatively large. After rainwater seeps from the calcareous sand layer 20 into the gravel layer 50, some water can be stored in the gaps of the gravel layer 50. This water can then return to the calcareous sand layer 20 and the planting soil layer 10 through evaporation, thereby replenishing the moisture of the planting soil layer 10 and the calcareous sand layer 20. On the other hand, the water storage device 40 is located in the middle of the gravel layer 50, so that there is a layer of gravel between the water storage device 40 and the calcareous sand layer 20. This layer of gravel can block soil particles in the calcareous sand layer 20, preventing soil particles from entering the water storage device 40 through the breathable structure. There is also a layer of gravel below the water storage device 40, and water overflowing from the water storage device 40 can seep down through this layer of gravel, preventing water from accumulating around the water storage device 40. On the other hand, the gaps between the gravels are relatively large, and the gaps in the gravel layer 50 are interconnected and extend over a wide range. After the water vapor in the water storage device 40 enters the gaps in the gravel layer 50, it can diffuse along the gaps in the gravel layer 50, so that a larger area of ​​the calcareous sand layer 20 and the planting soil layer 10 can be replenished with water.

[0028] In some embodiments, such as Figure 1 and Figure 2 As shown, the water storage device 40 includes a plurality of water storage pipes 41 laid horizontally and at intervals around the water collection well 30; the first end of the water storage pipe 41 is connected to the water collection well 30, and the end of the water storage pipe 41 is closed and extends in a direction away from the water collection well 30; the water storage pipe 41 is provided with a plurality of first vent holes 42 for water vapor in the water storage pipe 41 to enter the calcareous sand layer 20 and the planting soil layer 10.

[0029] Specifically, the water storage pipe 41 is preferably a straight pipe. The number of water storage pipes 41 can be two or more, such as three, six, or eight. All water storage pipes 41 are laid horizontally on the same plane to facilitate the flow of water from the collection well 30 to different water storage pipes 41. Preferably, the water storage pipes 41 are connected to the bottom end of the collection well 30 to prevent water from accumulating in the collection well 30. The beginnings of the water storage pipes 41 are arranged circumferentially around the collection well 30 at intervals. The beginnings of the water storage pipes 41 are connected to the collection well 30 so that rainwater can flow from the collection well 30 into the water storage pipes 41. The ends of the water storage pipes 41 are sealed to prevent water loss. The ends of the water storage pipes 41 extend away from the collection well 30, which can expand the coverage area of ​​the water storage device 40, thereby expanding the diffusion range of water vapor and helping to replenish moisture to a larger area of ​​the calcareous sand layer 20 and the planting soil layer 10. The first vent 42 can be located at the lower, middle, or upper part of the water storage pipe 41. Of course, to maximize the water storage capacity in the water storage pipe 41, the first vent 42 can be located at the top of the water storage pipe 41. Multiple first vents 42 are provided to increase the amount of water vapor released and expand the diffusion range of water vapor. Preferably, the pore size of the first vent 42 is smaller than the particle size of the soil particles in the calcareous sand layer 20 to prevent soil particles from entering.

[0030] In some embodiments, such as Figure 2 and Figure 3 As shown, the water storage device 40 also includes an outer sleeve 43 fitted over each water storage pipe 41. The first end of the outer sleeve 43 is sealed to the water collection well 30, and the end of the outer sleeve 43 is closed. The upper part of the outer sleeve 43 is provided with a plurality of second vent holes 44 for water vapor in the water storage pipe 41 to enter the calcareous sand layer 20 and the planting soil layer 10. The first vent hole 42 is located on the upper part of the water storage pipe 41, and the positions of the first vent hole 42 and the second vent hole 44 are completely offset.

[0031] Specifically, the outer casing 43 extends horizontally along the direction of the water storage pipe 41. The number of outer casings 43 corresponds to the number of water storage pipes 41. Both ends of the outer casing 43 are closed, and its interior forms a hollow cavity to accommodate the water storage pipes 41. Water vapor in the water storage pipes 41 can enter the calcareous sand layer 20 through the first vent 42 and the second vent 44 in sequence, so the outer casing 43 does not affect the diffusion of water vapor. The second vent is located at the top, which can minimize the amount of soil particles falling into the outer casing 43; even if soil particles fall into the second vent 44, because the first vent 42 and the second vent are completely staggered, the soil particles are unlikely to fall into the first vent 42, effectively preventing soil accumulation in the water storage pipes 41 and keeping the water storage pipes 41 unobstructed. Moreover, since water vapor diffuses upward, the location of the second vent at the top facilitates the rapid entry of water vapor into the calcareous sand layer 20 through the second vent 44. Preferably, the first vent 42 is located at the top of the water storage pipe 41 to maximize the water storage capacity of the water storage pipe 41. It should be noted that, in this embodiment, the upper part of the water storage pipe 41 refers to the area between the center of the pipe body and the top of the water storage pipe 41 in the vertical direction when the water storage pipe 41 is laid flat.

[0032] In some embodiments, such as Figure 3 As shown, the bottom end of the outer sleeve 43 is provided with a drain hole 45 for drainage.

[0033] Specifically, when the water in the water storage pipe 41 overflows, the water flows into the outer casing 43 through the first vent 42. This water can wash the inner wall of the outer casing 43 and the outer wall of the drainage pipe, and wash soil particles to the bottom of the inner casing 43. Then, the muddy water is discharged from the outer casing 43 through the drain hole 45. Preferably, there can be multiple drain holes 45, which are spaced apart along the length of the outer casing 43. Preferably, the drain holes 45 can be larger than the first vent 42 to facilitate the discharge of muddy water. Preferably, the water storage device 40 is located in the middle of the gravel layer 50, so there is a layer of gravel below the outer casing 43. The muddy water discharged from the drain hole 45 can seep downward through this layer of gravel to prevent water from accumulating around the outer casing 43. It should be noted that in this embodiment, the bottom end of the outer casing 43 refers to the lowest position of the water storage pipe 41 in the vertical direction when the outer casing 43 is laid flat.

[0034] In some embodiments, the second vent 44 is provided with a pore filter screen for preventing mud and sand from entering.

[0035] Specifically, during the water infiltration process, a very small amount of small-diameter soil particles may enter the second vent 44. The vent filter can effectively prevent these small-diameter soil particles from entering the outer casing 43. The vent filter is preferably made of wire mesh.

[0036] In some embodiments, the water collection well 30 is provided with a well filter screen to prevent silt from entering.

[0037] Specifically, rainwater often contains silt and sand. Installing a well filter screen can prevent silt and sand from entering, thus avoiding clogging of the water storage pipe 41. A bar screen is preferred for the well filter screen. Multiple layers of filter screens can be installed in the water collection well 30 to enhance filtration capacity.

[0038] In some embodiments, such as Figure 1 As shown, the planting soil layer 10 has a water collection pit that is sunken downward from the surface of the planting soil layer 10, and the wellhead of the water collection well 30 is located on the surface of the water collection pit.

[0039] Specifically, rainwater will converge into the sump, allowing more water to enter the water storage device 40, and also providing more reusable water for the calcareous sand layer 20 and the planting soil layer 10.

[0040] In some embodiments, a geotextile is provided between the calcareous sand layer 20 and the gravel layer 50. The geotextile can prevent soil particles from entering the gravel layer 50, thereby preventing them from entering the water storage device 40. Of course, the pore size of the geotextile should be smaller than the particle size of the soil particles in the calcareous sand layer 20 and the planting soil layer 10. Furthermore, a layer of geotextile can be wrapped around the outside of the outer casing 43.

[0041] In some embodiments, an organic matter layer 60 is disposed above the planting soil layer 10. The material of the organic matter layer 60 may be pine bark, hay, or wood chips, etc. The material of the organic matter layer 60 can improve the soil quality of the calcareous sandy soil layer 20 and the planting soil layer 10 during the microbial decomposition process, which is conducive to plant growth.

[0042] In some embodiments, the composition of the calcareous sand layer 20 and the planting soil layer 10 is improved. Specifically, in the planting soil layer 10, the weight percentage of calcareous sand is 67%-80%, and the weight percentage of peat moss and clay is 33%-20%; in the calcareous sand layer, the weight percentage of calcareous sand is 95%-100%, and the weight percentage of biochar and coconut coir is 0-5%. The improved calcareous sand layer 20 and planting soil layer 10 have stronger water retention capacity, which is beneficial to plant growth. Of course, the thickness ratio among the organic matter layer 60, planting soil layer 10, calcareous sand layer 20, and gravel layer 50 can also be adjusted as needed.

[0043] In some embodiments, plants with well-developed root systems are planted in the planting soil layer 10. The roots of these plants can anchor soil particles in the planting soil layer 10 and the calcareous sandy soil layer 20, preventing soil particles from entering the water storage device 40.

[0044] In some embodiments, the rainwater storage and reuse system further includes flushing pipes, the number of which corresponds to the number of water storage pipes 41. The end of the flushing pipe is connected to the end of the water storage pipe 41, the beginning of the flushing pipe extends beyond the surface of the planting soil layer 10, and the beginning of the flushing pipe is provided with an end cap. When there is silt in the water storage pipe 41, the end cap can be opened, a high-pressure water gun can be inserted into the beginning of the flushing pipe, and then the high-pressure water jet from the high-pressure water gun can be used to flush the water storage pipe 41 to keep the water storage pipe 41 unobstructed.

[0045] by Figure 1 For example, in a preferred embodiment, the rainwater storage and reuse system includes, from top to bottom, an organic matter layer 60, a planting soil layer 10, a calcareous sandy soil layer 20, a gravel layer 50, and a sandy soil layer 70. A collection well 30 extends from the surface of the planting soil layer 10 to the top surface of the sandy soil layer 70. The planting soil layer 10 has a downwardly recessed collection pit, and the opening of the collection well 30 is located in the collection pit. Geotextile is placed between the planting soil layer 10 and the calcareous sandy soil layer 20, between the calcareous sandy soil layer 20 and the gravel layer 50, and between the gravel layer 50 and the sandy soil layer 70. Eight straight water storage pipes 41 are laid flat in the middle of the gravel layer 50, and these eight water storage pipes 41 are evenly arranged around the collection well 30. The first end of the water storage pipe 41 is connected to the collection well 30, and the second end of the water storage pipe 41 extends away from the collection well 30. Multiple first vent holes 42, each with a diameter of 15 cm, are provided at the top of the water storage pipe 41. The spacing between adjacent first vent holes 42 is 5 cm along the length of the water storage pipe 41. Air filters can be installed in the first vent holes 42. An outer sleeve is fitted over the water storage pipe 41, with its first end sealed to the water collection well 30 and its end closed. Multiple second vent holes 44 are provided at the upper part of the outer sleeve 43, and multiple drainage holes 45 are provided at the bottom end of the outer sleeve 43. The second vent holes 44 are completely staggered from the first vent holes 42. Air filters can be installed in the second vent holes 44. Geotextile is laid between the outer sleeve 43 and the gravel layer 50. When rainwater enters the water storage pipe 41 through the collection well 30, the water storage pipe 41 can store the water for a long time. The water continuously evaporates in the water storage pipe 41 to form water vapor. The water vapor enters the calcareous sand layer 20 through the first vent 42 and the second vent 44, and diffuses into the planting soil layer 10 along the pores in the calcareous sand layer 20.

[0046] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto.

Claims

1. A rainwater storage and reuse system, characterized in that, It includes a planting soil layer (10) and a calcareous sandy soil layer (20) distributed from top to bottom; the planting soil layer (10) and the calcareous sandy soil layer (20) are provided with water collection wells (30) extending from the surface of the planting soil layer to the calcareous sandy soil layer (20). The water storage device (40) is located below the bottom surface of the calcareous sand layer (20); the water storage device (40) is connected to the water collection well (30) so that rainwater flowing into the water collection well (30) is stored in the water storage device (40); the water storage device (40) is provided with a breathable structure; when rainwater is stored in the water storage device (40), water vapor enters the calcareous sand layer (20) and the planting soil layer (10) through the breathable structure; The water storage device (40) includes a plurality of water storage pipes (41) laid horizontally and at intervals around the water collection well (30); the first end of each water storage pipe (41) is connected to the water collection well (30), and the second end of each water storage pipe (41) is closed and extends away from the water collection well (30); each water storage pipe (41) is provided with a plurality of first vent holes (42) for water vapor in the water storage pipe (41) to enter the calcareous sand layer (20) and the planting soil layer (10); the water storage device (40) also includes a sleeve fitted over each of the water storage pipes. (41) has an outer sleeve (43), the first end of which is sealed to the water collection well (30), and the end of which is closed; the upper part of the outer sleeve (43) is provided with a plurality of second vent holes (44) for water vapor in the water storage pipe (41) to enter the calcareous sand layer (20) and the planting soil layer (10); the first vent hole (42) is located on the upper part of the water storage pipe (41), and the position of the first vent hole (42) and the position of the second vent hole (44) are completely offset; Below the calcareous sandy soil layer (20) is a gravel layer (50), the gravel in the gravel layer (50) having a larger particle size than the soil particles in the calcareous sandy soil layer (20); the water storage device (40) is located in the middle of the gravel layer (50).

2. The rainwater storage and reuse system according to claim 1, characterized in that, The bottom end of the outer sleeve (43) is provided with a drain hole (45) for drainage.

3. The rainwater storage and reuse system according to claim 1, characterized in that, The second vent (44) is provided with a pore filter screen to prevent mud and sand from entering.

4. The rainwater storage and reuse system according to claim 1, characterized in that, Geotextile is provided between the calcareous sand layer (20) and the gravel layer (50).

5. The rainwater storage and reuse system according to claim 1, characterized in that, The water collection well (30) is equipped with a well filter screen to prevent silt from entering.

6. The rainwater storage and reuse system according to claim 1, characterized in that, The planting soil layer (10) is provided with a water collection pit that is recessed downward from the surface of the planting soil layer (10), and the wellhead of the water collection well (30) is located on the surface of the water collection pit.

7. The rainwater storage and reuse system according to claim 1, characterized in that, An organic matter layer (60) is placed above the planting soil layer (10).

Images