Integrated water storage type ecological flower bed

Abstract

This utility model relates to the field of sponge city technology, and more particularly to an integrated water-storage ecological flower bed, comprising: a box body and a water-storage layer, a planting soil layer, and a gravel layer arranged sequentially from top to bottom inside the box body. This invention employs a multi-level porous gravel layer with a coarse-fine-coarse tiered design, which can progressively intercept pollutants, effectively preventing clogging of the gravel layer and ensuring its permeability. A honeycomb grid plate fixes individual gravel structural units, forming a stable framework for each unit, preventing particle movement and improving compressive strength and flow conductivity. The synergistic effect of the coarse-grained layer, functional layer, and flow-guiding layer adsorbs pollutants and promotes microbial adhesion, thereby enhancing anti-clogging and purification performance. By embedding a backwashing structure within the flow-guiding layer, periodic backwashing can be used to remove clogging particles from the gravel layer, further improving anti-clogging performance.

Description

Technical Field

[0001] This utility model relates to the field of sponge city technology, and in particular to an integrated water-storage ecological flower bed. Specifically, it relates to an ecological flower bed with an optimized gravel layer structure that has anti-clogging function, suitable for rainwater storage and purification scenarios such as building roofs, squares, and municipal roads where there is no greening. Background Technology

[0002] With the acceleration of urbanization and the continuous increase in surface hardening, rainwater infiltration capacity has decreased, leading to increasingly prominent problems such as urban flooding and water pollution. To alleviate these problems, the concept of "sponge city" has been gradually promoted in recent years. Among them, rain gardens, ecological flower beds, and permeable paving are key technical means for rainwater source regulation and purification, and have been widely used.

[0003] In existing technologies, ecological flower beds typically employ a box structure, filled with a gravel layer, a planting soil layer, and a water storage layer to achieve rainwater collection, regulation, and purification. However, traditional ecological flower beds suffer from the following technical defects: (1) The gravel layer is prone to clogging: The gravel layer in existing ecological flower beds is mostly laid with natural gravel of a single particle size, resulting in a simple pore structure. Suspended solids, silt, and organic matter in rainwater are easily deposited in the pores, leading to a decrease in permeability and affecting the long-term operation of the system. In addition, the physical structure of the gravel layer is unstable, and particles are prone to displacement or collapse, further exacerbating the clogging problem. (2) High maintenance costs and long cycles: Once the gravel layer becomes clogged, it usually needs to be manually dug out for cleaning or replacement, which is complex and costly. Furthermore, the system cannot operate normally during maintenance, affecting the overall efficiency of rainwater management. (3) Unreasonable structural design and poor compressive strength and flow conduction performance: In the existing technology, the gravel layer is mostly laid loosely and lacks structural stability design. It is difficult to withstand the impact of high flow rainwater, which can easily lead to local collapse, water flow short circuit and other problems, affecting the hydraulic conduction efficiency of the system.

[0004] To address this, some patents have attempted to optimize the gravel layer structure. For example, CN219825526U discloses a rainwater ecological garden structure that improves rainwater purification by setting up a multi-layer filtration structure, but it does not specifically design for the anti-clogging performance of the gravel layer. CN117587760A proposes a prefabricated debris flow ecological permeable interception structure that uses prefabricated components to achieve modular construction, but it still has shortcomings in terms of the functionality and anti-clogging mechanism of the gravel material.

[0005] In addition, some patents attempt to introduce recycled or functional materials. For example, CN101306869A discloses a method for treating landscape water in a modified zeolite biological filter, which uses the adsorption properties of zeolite to remove pollutants. However, its structure is relatively complex and difficult to apply directly to the gravel layer design of ecological flower beds.

[0006] In summary, existing ecological flower beds still have significant room for improvement in terms of gravel layer structure design, material selection, and functional integration. There is an urgent need for an integrated water-storage ecological flower bed structure that is structurally sound, uses efficient materials, is easy to maintain, and has excellent anti-clogging performance, in order to improve the overall technical level of rainwater regulation and purification and meet the actual needs of sponge city construction. Utility Model Content

[0007] Therefore, it is necessary to provide an integrated water-storage ecological flower bed to address the aforementioned technical issues.

[0008] To achieve the above objectives, the technical solution of this utility model is as follows: an integrated water-storage ecological flower bed, comprising: a box body and a water-storage layer, a planting soil layer, and a gravel layer arranged sequentially from top to bottom inside the box body. The top of the box body is provided with an overflow prevention space. The gravel layer includes multiple gravel structural units and a backwashing structure. Adjacent gravel structural units are separated by a honeycomb grid plate. Each gravel structural unit includes a coarse-grained layer, a functional layer, and a flow-guiding layer arranged sequentially from top to bottom. The coarse-grained layer has a particle size of 20-40mm, the functional layer has a particle size of 10-20mm, and the flow-guiding layer has a particle size of 5-10mm. One end of the backwashing structure is embedded in the flow-guiding layer, and the other end is connected to an external water source. The water-storage layer has an overflow port. The bottom of the gravel layer is provided with a drainage blind pipe connected to the overflow port. The side of the box body is provided with a water outlet pipe connected to the drainage blind pipe.

[0009] As a further improvement of this utility model, the box body is made of recycled PP material, the height of the box body is 700mm, and the top of the box body is provided with an overflow prevention space with a height of 100mm.

[0010] As a further embodiment of this utility model, the coarse-grained layer is made of recycled PP plastic granules, the functional layer is made of ceramsite, and the flow-guiding layer is made of volcanic rock.

[0011] As a further embodiment of this utility model, the backwashing structure is a backwashing pipe with water outlet holes on its surface.

[0012] As a further embodiment of this invention, the thickness of the water storage layer is 200mm, and the diameter of the overflow outlet is DN150.

[0013] As a further embodiment of this utility model, the thickness of the planting soil layer is 200mm, and the surface of the planting soil layer is covered with a φ3–5cm pebble layer.

[0014] As a further embodiment of this utility model, the coarse-grained layer, functional layer and flow-guiding layer inside each gravel structural unit are arranged in a staggered manner.

[0015] As a further improvement of this utility model, it also includes a rainwater outer pipe, the output end of which extends into the interior of the housing.

[0016] The advantages and beneficial effects of this utility model are as follows: The integrated water-storage ecological flower pond provided by this utility model adopts a multi-level porous gravel layer with a coarse-fine-coarse layer design, which can intercept pollutants step by step, thereby effectively preventing the gravel layer from becoming clogged and ensuring its permeability. Individual gravel structural units are fixed by a honeycomb grid plate, so that each gravel structural unit forms a stable skeleton, thereby preventing particle movement and improving pressure resistance and flow guiding performance. Through the synergistic effect of the coarse-grained layer, functional layer, and flow guiding layer, it has functions such as adsorbing pollutants and promoting microbial attachment, thereby improving anti-clogging and purification performance. By embedding a backwashing structure in the flow guiding layer, a periodic backwashing method can be used to backwash the gravel layer and remove clogging particles, which not only improves anti-clogging performance but also solves the problems of manual cleaning or replacement, complex operation, and high cost after gravel layer clogging. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the integrated water-storage ecological flower bed of this utility model.

[0018] Figure 2 This is a schematic diagram of the gravel layer structure of this utility model.

[0019] Attached reference numerals: 1. Box body, 2. Water storage layer, 3. Planting soil layer, 4. Gravel layer, 5. Pebble layer, 6. Outlet pipe, 7. Drainage blind pipe, 8. Overflow outlet, 9. Rainwater outer pipe, 10. Gravel structural unit, 11. Coarse-grained layer, 12. Functional layer, 13. Guide layer, 14. Backwash pipe, 15. Outlet hole, 16. Honeycomb grid plate. Detailed Implementation

[0020] The embodiments of this application will now be described in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. Furthermore, the following embodiments and features can be combined with each other unless otherwise specified. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0021] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0022] To address the problems of easy clogging of the gravel layer 4, high maintenance costs, limited material functionality, and unreasonable structural design in existing technologies, this application provides an integrated water-retaining ecological flower bed comprising a box body 1, a water storage layer 2, a planting soil layer 3, and a gravel layer 4. (See attached diagram.) Figure 1 The integrated water-storage ecological flower bed includes: a box body 1 and a water storage layer 2, a planting soil layer 3, and a gravel layer 4 arranged from top to bottom inside the box body 1. The top of the box body 1 is provided with an overflow prevention space. The gravel layer 4 includes multiple gravel structural units 10 and a backwashing structure. Adjacent gravel structural units 10 are separated by a honeycomb grid plate 16. Each gravel structural unit 10 includes a coarse-grained layer 11, a functional layer 12, and a flow guiding layer 13 arranged from top to bottom. The coarse-grained layer 11 has a particle size of 20-40mm, the functional layer 12 has a particle size of 10-20mm, and the flow guiding layer 13 has a particle size of 5-10mm. One end of the backwashing structure is embedded in the flow guiding layer 13, and the other end is connected to an external water source. The water storage layer 2 has an overflow port 8. The bottom of the gravel layer 4 is provided with a drainage blind pipe 7 connected to the overflow port 8. The side of the box body 1 is provided with a water outlet pipe 6 connected to the drainage blind pipe 7.

[0023] In this embodiment, the box 1 is made of recycled PP material, the height of the box 1 is 700mm, and the top of the box 1 is provided with an overflow prevention space with a height of 100mm.

[0024] In this embodiment, the coarse-grained layer 11 is made of recycled PP plastic granules, the functional layer 12 is made of ceramsite, and the flow guiding layer 13 is made of volcanic rock.

[0025] In this embodiment, the gravel layer 4 involved in this application constructs a multi-stage filtration structure of "coarse-fine-coarse" to achieve step-by-step interception of pollutants and avoid rapid clogging of a single pore structure. The specific structure includes: upper layer (coarse particle layer 11): using recycled PP plastic particles with a particle size of 20-40mm to intercept large suspended particles; middle layer (functional layer 12): using ceramic particles with a particle size of 10-20mm to purify water through physical adsorption, biodegradation, and chemical neutralization; lower layer (flow guiding layer 13): using volcanic rock with a particle size of 5-10mm to ensure smooth water flow and avoid water accumulation while continuously filtering and purifying water. Using the gravel layer 4 involved in this application has advantages such as reducing the risk of clogging, extending service life, and improving pollutant removal efficiency.

[0026] In this embodiment, the backwashing structure is a backwashing pipe 14 with water outlet holes 15 on its surface. By embedding the backwashing pipe 14 with water outlet holes 15 on its surface into the guide layer 13 and connecting it to an external water source, the gravel layer 4 can be flushed periodically (i.e., every certain period of time, such as monthly) with reverse water flow. This can remove clogging particles, restore the permeability of the gravel layer 4, and has advantages such as reducing the frequency of manual maintenance, improving the operational stability of the integrated water storage ecological flower bed, and extending the service life of the gravel layer 4. In addition, the backwashing pipe 14 can be linked with a rainwater storage system to use rainwater stored in the storage tank for flushing.

[0027] In this embodiment, the thickness of the water storage layer 2 is 200mm, and the diameter of the overflow port 8 is DN150.

[0028] In this embodiment, the thickness of the planting soil layer 3 is 200mm, and the surface of the planting soil layer 3 is covered with a φ3–5cm pebble layer 5.

[0029] In this embodiment, the planting soil layer 3 involved in this application should be selected from plants that are resistant to erosion and flooding, such as irises, and a 3-5cm pebble layer 5 should be laid on its surface to improve the landscape effect.

[0030] In this embodiment, the coarse-grained layer 11, functional layer 12 and flow-guiding layer 13 inside each gravel structural unit 10 are arranged in a staggered manner.

[0031] In this embodiment, this application changes the traditional loose gravel laying method and adopts a modular three-dimensional arrangement structure to form a stable three-dimensional skeleton structure, improve hydraulic conduction efficiency, and prevent particle movement and pore collapse. The specific structure includes: using a honeycomb grid plate 16 to divide the gravel layer 4 into multiple independent gravel structure units 10. The coarse-grained layer 11, functional layer 12 and flow guiding layer 13 inside each gravel structure unit 10 are arranged in a staggered manner to form a stable support structure, which has the advantages of improving structural stability and preventing gravel settlement from causing pore blockage.

[0032] In this embodiment, a rainwater outer pipe 9 is also included, the output end of which extends into the housing 1.

[0033] In this embodiment, taking the application scenario of ecological side ditch on municipal roads as an example, the installation steps of the integrated water-storage ecological flower bed provided in this application include: setting up integrated water-storage ecological flower beds on both sides of the road, with the length of the box 1 being segmented and spliced ​​according to the length of the road; laying a honeycomb grid plate 16 at the bottom of the box 1 to divide the gravel layer 4 into two gravel structural units 10 (see attached figure). Figure 2 The gravel layer 4 comprises two gravel structural units 10. Each gravel structural unit 10 is filled sequentially from bottom to top with volcanic rock with a particle size of 5-10 mm, expanded clay with a particle size of 10-20 mm, and recycled PP plastic granules with a particle size of 20-40 mm. Above the gravel layer 4, a planting soil layer 3 is set up, planted with low-maintenance plants (such as liriope and daylily), and the surface is covered with a φ3-5cm pebble layer 5. The upper water storage layer 2 is connected to a DN150 overflow outlet 8, and the outlet pipe 6 is connected to the municipal water supply network. Tests show that the operational effect of this structure is as follows: the multi-level design of the gravel layer 4 increases the suspended solids interception efficiency by 40%, the permeability by 30%, the backwashing structure is activated once a month, the maintenance cost is reduced by 50%, the rainwater purification efficiency is increased by 50%, and the nitrogen and phosphorus removal rate reaches over 60%.

[0034] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications or substitutions should be considered within the protection scope of the present invention.

Claims

1. An integrated water-storage type ecological flower bed, characterized in that: include: The tank consists of a water storage layer, a planting soil layer, and a gravel layer arranged sequentially from top to bottom inside the tank. The top of the tank has an overflow prevention space. The gravel layer includes multiple gravel structural units and a backwashing structure. Adjacent gravel structural units are separated by a honeycomb grid. Each gravel structural unit includes a coarse-grained layer, a functional layer, and a flow guiding layer arranged sequentially from top to bottom. The coarse-grained layer has a particle size of 20-40 mm, the functional layer has a particle size of 10-20 mm, and the flow guiding layer has a particle size of 5-10 mm. One end of the backwashing structure is embedded in the flow guiding layer, and the other end is connected to an external water source. The water storage layer has an overflow port. The bottom of the gravel layer has a drainage blind pipe connected to the overflow port. The side of the tank has a water outlet pipe connected to the drainage blind pipe.

2. The integrated water-storage ecological flower bed according to claim 1, characterized in that, The box is made of recycled PP material, the height of the box is 700mm, and the top of the box has an overflow prevention space with a height of 100mm.

3. The integrated water-storage ecological flower bed according to claim 1, characterized in that, The coarse-grained layer is made of recycled PP plastic granules, the functional layer is made of ceramsite, and the flow-guiding layer is made of volcanic rock.

4. The integrated water-storage ecological flower bed according to claim 1, characterized in that, The backwashing structure is a backwashing pipe with water outlet holes on its surface.

5. The integrated water-storage ecological flower bed according to claim 1, characterized in that, The thickness of the water storage layer is 200mm, and the diameter of the overflow outlet is DN150.

6. The integrated water-storage ecological flower bed according to claim 1, characterized in that, The thickness of the planting soil layer is 200mm, and the surface of the planting soil layer is covered with a 3-5cm pebble layer.

7. The integrated water-storage ecological flower bed according to claim 1, characterized in that, The coarse-grained layer, functional layer, and flow-guiding layer inside each gravel structural unit are arranged in a staggered manner.

8. The integrated water-storage ecological flower bed according to claim 1, characterized in that, It also includes a rainwater pipe, the output end of which extends into the interior of the housing.

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