Sponge city roof rainwater collecting system

Abstract

The utility model relates to the technical field of water resource management, and discloses a sponge city roof rainwater collection system which comprises a rainwater downpipe, a regulation and storage seepage well and an overflow rainwater well, and the rainwater downpipe extends to the underground from a roof and converges into the regulation and storage seepage well; a filter layer, a permeable layer and a gravel layer are sequentially arranged at the bottom of the regulation and storage seepage well from top to bottom, and a perforated drainage blind pipe is arranged in the gravel layer and converged into the overflow rainwater well; the overflow catch basin is connected with a municipal catch basin nearby. According to the sponge city roof rainwater collection system, the rainwater falling pipe, the regulation and storage seepage well and the overflow rainwater well are sequentially connected, the rainwater collection, storage, filtration and overflow processes are achieved, the urban drainage pressure is effectively relieved, rainwater is purified, the water resource utilization rate is increased, sponge city construction is assisted, and ecological balance is promoted.

Description

Technical Field

[0001] This utility model relates to the field of water resource management technology, and in particular to a sponge city roof rainwater harvesting system. Background Technology

[0002] Rainwater is a fundamental, direct, and economical water resource, and a crucial link in the natural water cycle. It plays a vital role in regulating and replenishing regional water resources and improving and protecting the ecological environment. Therefore, the rational collection and utilization of rainwater is of great significance.

[0003] Conservative estimates suggest that rooftops account for 30% or more of the total urban land area. Currently, a large amount of rainwater from rooftops flows directly into the municipal drainage network through downpipes, putting pressure on the city's drainage system. Furthermore, the direct flow of untreated rainwater into the municipal network also causes rainwater pollution.

[0004] Therefore, the effective collection, purification and storage of rainwater is of great significance for improving urban flooding, effectively utilizing rainwater and building sponge cities. Utility Model Content

[0005] The purpose of this invention is to provide a sponge city roof rainwater harvesting system to solve the problems mentioned in the background art and achieve effective regulation and storage of roof rainwater.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A sponge city roof rainwater harvesting system includes downpipes, infiltration wells, and overflow wells, wherein:

[0008] Rainwater downpipes extend from the roof to the ground and flow into storage and infiltration wells;

[0009] The bottom of the storage and infiltration well is provided with a filter layer, a permeable layer and a gravel layer from top to bottom. The gravel layer is equipped with a perforated drainage blind pipe, which flows into the overflow rainwater well.

[0010] The overflow storm drain is connected to the nearest municipal storm drain.

[0011] As an alternative, a filter layer is installed in the well cavity of the storage and seepage well, and submersible glass pumice is laid in the filter layer, with a thickness of not less than 100mm.

[0012] As an alternative, a permeable geotextile is installed in the permeable layer to separate the filter layer from the gravel layer.

[0013] As an optional solution, the gravel particle size of the crushed stone layer is 30mm to 50mm, the perforated drainage blind pipe adopts DN100PE pipe, and the thickness of the crushed stone layer is not less than 300mm.

[0014] As an alternative, the well wall of the storage and seepage well is constructed of solid bricks, and the inner surface of the well wall is coated with waterproof mortar. The bottom of the well wall is provided with a concrete foundation cast in a layer of crushed stone.

[0015] As an alternative, the well cavity of the storage and seepage well extends horizontally, and a reinforced concrete cover plate is installed at the top of the well cavity, at the non-wellhead area.

[0016] As an alternative, the wellhead of the storage and infiltration well is equipped with an overflow cover, an overflow rainwater inlet is installed on the overflow cover, a rain garden is set on the outside of the overflow cover, and the overflow rainwater well is located in the rain garden.

[0017] As an alternative, the outer ring of the overflow cover is scattered with pebbles.

[0018] As an alternative, a replacement soil layer is provided in the rain garden above the permeable layer, and an inorganic cover layer is provided on top of the replacement soil layer.

[0019] The beneficial effects of this utility model are:

[0020] This sponge city roof rainwater harvesting system achieves the process of rainwater collection, storage, filtration, and overflow through the sequential connection of rainwater downpipes, regulating and infiltration wells, effectively reducing urban drainage pressure, purifying rainwater, improving water resource utilization, contributing to sponge city construction, and promoting ecological balance. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the surface plan of the sponge city roof rainwater harvesting system provided in this embodiment of the utility model;

[0022] Figure 2 yes Figure 1 Cross-sectional view at point AA;

[0023] Figure 3 yes Figure 1 Cross-sectional view at point BB.

[0024] In the attached image:

[0025] 1. Rainwater downpipe; 2. Storage and infiltration well; 3. Overflow rainwater well; 4. Filter layer; 5. Permeable layer; 6. Gravel layer; 7. Perforated drainage blind pipe; 8. Concrete foundation; 9. Reinforced concrete cover slab; 10. Overflow cover; 11. Rain garden; 12. Pebbles; 13. Replacement soil layer; 14. Inorganic cover layer. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, the terms "first" and "second" are merely used to distinguish between different terms in description and do not have any special meaning.

[0031] Please see Figures 1 to 3 As shown, this embodiment provides a sponge city roof rainwater harvesting system, including a rainwater downpipe 1, a regulating and infiltration well 2, and an overflow rainwater well 3, wherein:

[0032] Rainwater pipe 1 extends from the roof to the ground and flows into the regulating and infiltration well 2;

[0033] The bottom of the storage and infiltration well 2 is provided with a filter layer 4, a permeable layer 5 and a gravel layer 6 from top to bottom. A perforated drainage blind pipe 7 is installed in the gravel layer 6 and flows into the overflow rainwater well 3.

[0034] Overflow storm drain 3 is connected to the nearest municipal storm drain.

[0035] Thus, by connecting the rainwater downpipe 1, the regulating and infiltration well 2, and the overflow rainwater well 3 in sequence, the process of rainwater collection, storage, filtration, and overflow is realized, which effectively reduces the pressure on urban drainage, purifies rainwater, improves water resource utilization, helps the construction of sponge cities, and promotes ecological balance.

[0036] Optionally, the filter layer 4 is disposed in the well cavity of the storage and seepage well 2, and the filter layer 4 is filled with submersible glass pumice, and the thickness of the filter layer 4 is not less than 100mm.

[0037] Thus, rainwater from the building roof is guided to the regulating and infiltration well 2 through the rainwater downpipe 1. The submersible glass pumice has excellent adsorption and filtration performance, which can effectively remove suspended solids and impurities from the rainwater and ensure the purity of the water.

[0038] Optionally, a permeable geotextile is provided in the permeable layer 5 to separate the filter layer 4 from the gravel layer 6.

[0039] Therefore, the permeable geotextile prevents submerged glass pumice and impurities from entering the crushed stone layer 6, while ensuring permeability and smooth rainwater filtration. The permeable geotextile material has high strength and corrosion resistance, ensuring long-term use without damage. Optionally, the gravel particle size of the crushed stone layer 6 is 30mm to 50mm, the perforated drainage blind pipe 7 is a DN100 PE pipe, and the thickness of the crushed stone layer 6 is not less than 300mm.

[0040] Thus, rainwater is further purified by the gravel layer 6 and efficiently guided to the overflow rainwater well 3 through the perforated drainage blind pipe 7, ensuring that rainwater is discharged quickly, preventing water accumulation, and ensuring the sustainable use of rainwater resources.

[0041] Optionally, the well wall of the storage and seepage well 2 is constructed of solid bricks, and the inner surface of the well wall is coated with waterproof mortar. The bottom of the well wall is provided with a concrete foundation 8 cast in the crushed stone layer 6.

[0042] The waterproof mortar layer on the well wall is no less than 20mm thick to ensure the well structure is stable and has excellent waterproof performance, thus extending its service life; the concrete foundation is no less than 100mm thick to provide solid support, prevent well settlement, and ensure the long-term stable operation of the system.

[0043] Optionally, the well cavity of the storage and seepage well 2 extends horizontally, and a reinforced concrete cover plate 9 is provided at the top of the well cavity, at the non-wellhead location.

[0044] Therefore, the reinforced concrete cover plate 9 ensures the stability of the top structure of the well cavity, expands the effective volume of the well cavity, and enhances the rainwater storage capacity. Furthermore, a reinforced concrete beam is installed between the reinforced concrete cover plate 9 and the well opening to ensure the structural strength at the well opening.

[0045] Optionally, the wellhead of the storage and infiltration well 2 is provided with an overflow cover 10, an overflow rainwater inlet is provided on the overflow cover 10, a rain garden 11 is provided on the outside of the overflow cover 10, and the overflow rainwater well 3 is located in the rain garden 11.

[0046] Thus, the plants and soil in Rain Garden 11 further purify the overflowing rainwater, forming an ecological cycle, beautifying the environment, enhancing the rainwater absorption capacity of urban green spaces, and achieving dual benefits of ecology and landscape.

[0047] Furthermore, the outer ring of the overflow cover 10 is scattered with pebbles 12. The pebbles 12 can prevent soil erosion, enhance the aesthetic appeal of the landscape, avoid clogging the overflow drain, ensure smooth overflow of rainwater, and add a natural charm to the city.

[0048] Optionally, a replacement soil layer 13 is provided in the rain garden 11 and above the permeable layer 5, and an inorganic cover layer 14 is provided above the replacement soil layer 13.

[0049] The thickness of the replacement soil layer 13 is designed according to the height of the storage and infiltration well 2 and the overflow rainwater well 3 to ensure good connection between the replacement soil layer 13 and the surrounding soil and enhance permeability. The inorganic cover layer 14 is composed of ceramsite or volcanic rock, and the thickness of the inorganic cover layer 14 should be 50mm to 100mm to ensure uniform coverage, enhance soil aeration, improve the vitality of plant roots, promote rapid rainwater infiltration, maintain the ecological balance of the rain garden 11, and at the same time enhance the aesthetics of the landscape, achieving a perfect integration of ecology and aesthetics.

[0050] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A sponge city roof rainwater harvesting system, characterized in that, It includes rainwater downpipes (1), storage and infiltration wells (2), and overflow rainwater wells (3), wherein: The rainwater pipe (1) extends from the roof to the ground and flows into the regulating and infiltration well (2); The bottom of the storage and infiltration well (2) is provided with a filter layer (4), a permeable layer (5) and a gravel layer (6) from top to bottom. A perforated drainage blind pipe (7) is provided in the gravel layer (6), and the perforated drainage blind pipe (7) flows into the overflow rainwater well (3). The overflow storm drain (3) is connected to the municipal storm drain nearby.

2. The sponge city roof rainwater harvesting system according to claim 1, characterized in that, The filter layer (4) is disposed in the well cavity of the storage and seepage well (2), and the filter layer (4) is filled with submersible glass pumice, and the thickness of the filter layer (4) is not less than 100mm.

3. The sponge city roof rainwater harvesting system according to claim 1, characterized in that, The permeable layer (5) is provided with a permeable geotextile, which is used to separate the filter layer (4) from the gravel layer (6).

4. The sponge city roof rainwater harvesting system according to claim 1, characterized in that, The gravel particle size of the crushed stone layer (6) is 30mm to 50mm, the perforated drainage blind pipe (7) is made of DN100PE pipe, and the thickness of the crushed stone layer (6) is not less than 300mm.

5. The sponge city roof rainwater harvesting system according to claim 1, characterized in that, The well wall of the regulating and seepage well (2) is constructed of solid bricks, and the inner surface of the well wall is coated with waterproof mortar. The bottom of the well wall is provided with a concrete foundation (8) poured into the crushed stone layer (6).

6. The sponge city roof rainwater harvesting system according to claim 5, characterized in that, The well cavity of the regulating and seepage well (2) extends horizontally, and a reinforced concrete cover plate (9) is provided at the top of the well cavity at the non-wellhead position.

7. The sponge city roof rainwater harvesting system according to claim 1, characterized in that, The wellhead of the storage and infiltration well (2) is provided with an overflow cover (10), and an overflow rainwater inlet is provided on the overflow cover (10). A rain garden (11) is provided on the outside of the overflow cover (10), and the overflow rainwater well (3) is located in the rain garden (11).

8. The sponge city roof rainwater harvesting system according to claim 7, characterized in that, The outer ring of the overflow cover (10) is scattered with pebbles (12).

9. The sponge city roof rainwater harvesting system according to claim 7, characterized in that, A replacement soil layer (13) is provided in the rain garden (11) and above the permeable layer (5), and an inorganic cover layer (14) is provided above the replacement soil layer (13).

Images