Overflow structure of a rain garden
By designing the structure of the overflow tube and cover in the rain garden and using the siphon effect to treat excess rainwater, the problem of long-term water accumulation and mosquito breeding in the rain garden is solved.
Patent Information
- Application Number
- CN202420814718.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-18
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-04-18
AI Technical Summary
When the rainwater height in the rainwater garden is lower than the overflow height of the overflow pipe, the accumulated water in the rainwater garden can only be slowly discharged by underwater seepage, resulting in long-term accumulation of water and breeding mosquitoes.
A rainwater garden overflow port structure is designed, including an anti-seepage layer, a gravel layer, a planting soil layer and an overflow pipe pre-buried in the gravel layer. The top of the overflow pipe penetrates through the planting soil layer and extends above it. The overflow pipe is covered with a cover body, and a plurality of uniformly distributed perforations are provided on the circumference of the cover body.
Through the design of the overflow tube and cover, when the rainwater reaches the height of the overflow start, a siphon effect is generated, which continuously siphons the rainwater into the overflow tube, solving the problem of long-term water accumulation in the rainwater garden and mosquito breeding.
Smart Images
Figure CN222730715U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of rain garden overflow, and in particular to an overflow outlet structure of a rain garden. Background Art
[0002] A rain garden is a design concept that uses rainwater resources for irrigation and gardening. By collecting and utilizing rainwater, it can reduce urban rainwater runoff and protect water resources. It can also provide sufficient water for plants, promote plant growth, and achieve the goals of water conservation and environmental protection.
[0003] Existing rain gardens are generally equipped with overflow pipes to discharge excess rainwater. When there is little rain in the rain garden and the overflow height is not reached, the rainwater will seep through the rain garden to achieve the purpose of discharging rainwater; when the water storage height of the rain garden reaches the overflow height, that is: there is excess rainwater, the rainwater overflows the overflow pipe and is discharged through the overflow pipe.
[0004] However, the above-mentioned related technologies have the following problems: when the excess rainwater in the rain garden is discharged through an overflow pipe, when the rainwater level in the rain garden is lower than the overflow height of the overflow pipe, the accumulated water in the rain garden can only be slowly discharged by infiltration of the rain garden, resulting in long-term water accumulation in the rain garden. Long-term water accumulation will breed mosquitoes, and further improvements are needed. Utility Model Content
[0005] In order to solve the above-mentioned problem that when the rainwater height in the rain garden is lower than the overflow height of the overflow pipe, the accumulated water in the rain garden can only be discharged slowly by infiltration of the rain garden, resulting in long-term accumulation of water in the rain garden, which will breed mosquitoes, the present application provides an overflow outlet structure for a rain garden.
[0006] The overflow outlet structure of a rain garden provided in this application adopts the following technical solution:
[0007] The invention discloses an overflow outlet structure of a rain garden, comprising an impermeable layer, a gravel layer and a planting soil layer laid in sequence from bottom to top, and an overflow pipe pre-buried in the gravel layer, wherein the impermeable layer, the gravel layer and the planting soil layer together form a rain garden, the top end of the overflow pipe penetrates the planting soil layer and extends to above the planting soil layer, a cover body is provided on the overflow pipe, and a plurality of evenly distributed perforations are opened on the circumference of the cover body.
[0008] By adopting the above technical solution, on rainy days, the rain garden will achieve infiltration of rainwater through its own infiltration function. As the rainfall gradually increases, the rain garden begins to store water and the water level gradually rises. When the water level reaches the overflow start height, rainwater begins to enter the overflow pipe until the rainwater fills the space between the overflow pipe and the cover body. At this time, a siphon is generated, and the rainwater is continuously siphoned into the overflow pipe. At this time, the water level outside the cover will gradually be lower than the water level inside the cover until the water level outside the cover is flush with the perforation, the overflow stops, and the rain garden begins to store water, and the cycle is carried out in this order. Thereby solving the problem that when the rainwater height in the rain garden is lower than the overflow height of the overflow pipe, the accumulated water in the rain garden can only be slowly discharged by the infiltration of the rain garden, resulting in long-term water accumulation in the rain garden, which will breed mosquitoes.
[0009] Preferably, one end of the overflow pipe away from the cover body is connected to an overflow well, and the overflow well is connected to a rainwater well through a pipeline.
[0010] By adopting the above technical solution, the overflow well and the rainwater well are used to discharge rainwater in the overflow pipe.
[0011] Preferably, a hardened layer is provided on the upper surface of the planting soil layer, and the top surface of the hardened layer supports the cover body.
[0012] By adopting the above technical solution, the hardened layer supports the cover body, thereby playing a supporting role for the cover body.
[0013] Preferably, the hardening layer is fixedly connected to the cover body.
[0014] By adopting the above technical solution, the hardened layer is fixedly connected to the cover body, so that the cover body is more stably covered on the overflow pipe.
[0015] Preferably, the anti-seepage layer is an anti-seepage geotextile.
[0016] By adopting the above technical solutions, anti-permeable geotextiles can minimize the penetration and diffusion of water, chemicals or particulate matter in the soil of the rain garden.
[0017] Preferably, the crushed stone layer includes a coarse crushed stone layer laid on the upper surface of the anti-seepage layer and a fine crushed stone layer laid on the upper surface of the coarse crushed stone layer.
[0018] By adopting the above technical solution, the coarse gravel layer and the fine gravel layer can be used for filling and as a cushion layer to provide uniform support for the planting soil layer; at the same time, the coarse gravel layer and the fine gravel layer can be used as a drainage layer to help remove the accumulated water in the planting soil layer, so that the rain garden has the function of infiltrating rainwater.
[0019] Preferably, a blind pipe connected to the overflow well is pre-buried in the coarse gravel layer.
[0020] By adopting the above technical solution, the blind pipe has extremely high surface water seepage capacity and internal water flow capacity, so that rainwater that infiltrates into the gravel layer can be discharged into the overflow well and then discharged into the rainwater well through the overflow well.
[0021] Preferably, a plurality of overflow pipes are provided.
[0022] By adopting the above technical solution, the setting of multiple overflow pipes can match the discharge volume of rainwater and the size of the rain garden.
[0023] In summary, the present application includes at least one of the following beneficial technical effects:
[0024] 1. On rainy days, the rain garden will infiltrate rainwater through its own infiltration function. As the rainfall gradually increases, the rain garden begins to store water and the water level gradually rises. When the water level reaches the overflow start height, rainwater begins to enter the overflow pipe until the rainwater fills the space between the overflow pipe and the cover body. At this time, siphoning occurs, and the rainwater is continuously siphoned into the overflow pipe. At this time, the water level outside the cover will gradually be lower than the water level inside the cover until the water level outside the cover is flush with the perforation, the overflow stops, and the rain garden begins to store water, and the cycle is repeated in this order. This solves the problem that when the rainwater height in the rain garden is lower than the overflow height of the overflow pipe, the accumulated water in the rain garden can only be slowly discharged by the infiltration of the rain garden, resulting in long-term water accumulation in the rain garden, which will breed mosquitoes.
[0025] 2. The coarse and fine crushed stone layers can be used to fill and serve as cushion layers to provide uniform support for the planting soil layer; at the same time, the coarse and fine crushed stone layers can serve as drainage layers to help drain the water from the planting soil layer, thus enabling the rain garden to infiltrate rainwater;
[0026] 3. The blind pipe has extremely high surface water seepage capacity and internal water permeability, so that the rainwater that infiltrates into the gravel layer can be discharged into the overflow well and then discharged into the rainwater well through the overflow well. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a schematic diagram of the overall structure of this application.
[0028] Figure 2 yes Figure 1 A partial enlarged schematic diagram of part A.
[0029] Figure 3 It is a structural schematic diagram of the overflow pipe of the present application in the water storage process.
[0030] Figure 4 It is a structural schematic diagram of the overflow pipe of the present application at the beginning of overflow.
[0031] Figure 5It is a structural schematic diagram of the overflow pipe of the present application in the overflow process.
[0032] Figure 6 It is a structural schematic diagram of the overflow pipe of the present application at the end of overflow.
[0033] Explanation of the accompanying reference numerals: 1. anti-seepage layer; 2. coarse crushed stone layer; 3. fine crushed stone layer; 4. planting soil layer; 5. overflow pipe; 6. cover body; 61. perforation; 7. overflow well; 8. blind pipe; 9. hardened layer. DETAILED DESCRIPTION
[0034] The following is combined with Figure 1-6 This application is described in further detail.
[0035] The present application embodiment discloses an overflow structure of a rain garden. Figure 1 and Figure 2 The overflow structure of the rain garden includes an impermeable layer 1, a gravel layer and a planting soil layer 4 which are laid in sequence from bottom to top, and an overflow pipe 5 which is pre-buried in the gravel layer. The top of the overflow pipe 5 passes through the planting soil layer 4 and extends to the top of the planting soil layer 4. A cover body 6 is provided on the overflow pipe 5. The impermeable layer 1, the gravel layer and the planting soil layer 4 together form a rain garden. A plurality of overflow pipes 5 are provided, and the number of overflow pipes 5 needs to match the discharge of rainwater and the size of the rain garden.
[0036] Reference Figure 1 and Figure 2 In this embodiment, the anti-seepage layer 1 is an anti-seepage geotextile, which can minimize the penetration and diffusion of water, chemicals or particulate matter in the soil of the rain garden. The crushed stone layer includes a coarse crushed stone layer 2 and a fine crushed stone layer 3. The coarse crushed stone layer 2 is paved with crushed stones with a particle size of 30-50 mm, and the fine crushed stone layer 3 is paved with crushed stones with a particle size of 5-15 mm. The crushed stones with a particle size of 30-50 mm are paved on the upper surface of the anti-seepage geotextile, thereby forming a coarse crushed stone layer 2 on the upper surface of the anti-seepage geotextile; then, crushed stones with a particle size of 5-15 mm are paved on the upper surface of the coarse crushed stone layer 2, thereby forming a fine crushed stone layer 3 on the upper surface of the coarse crushed stone layer 2, and finally planting soil is paved on the upper surface of the fine crushed stone layer 3, thereby forming a planting soil layer 4 on the fine crushed stone layer 3, so that the rain garden formed by the anti-seepage layer 1, the crushed stone layer and the planting soil layer 4 has the function of infiltrating rainwater.
[0037] Reference Figure 1 and Figure 2 The end of the overflow pipe 5 away from the cover body 6 is connected to the overflow well 7, and the overflow well 7 is connected to the rainwater well through a pipeline. A blind pipe 8 is pre-buried in the coarse gravel layer 2, and the blind pipe 8 is connected to the overflow well 7. The blind pipe 8 has extremely high surface water permeability and internal water permeability, so that the rainwater that infiltrates into the gravel layer can be discharged into the overflow well 7, and then discharged into the rainwater well through the overflow well 7.
[0038] Reference Figure 1 and Figure 2 The cover body 6 is a hollow cover body 6 with an opening at the bottom, and a plurality of evenly distributed perforations 61 are provided on the circumference of the cover body 6 and at the opening of the cover body 6; when the cover body 6 is placed on the overflow pipe 5 with the opening downward, the perforations 61 on the cover body 6 are located at the bottom. The inner diameter of the cover body 6 is larger than the outer diameter of the overflow pipe 5, and the height of the top of the inner wall of the cover body 6 is higher than the height of the top of the overflow pipe 5, so that when the cover body 6 is placed on the overflow pipe 5, rainwater can flow into the space between the cover body 6 and the overflow pipe 5 through the perforations 61.
[0039] Reference Figure 1 and Figure 2 In order to support the cover body 6, a hardened layer 9 is provided on the upper surface of the planting soil layer 4, and the hardened layer 9 is arranged around the overflow pipe 5. When the cover body 6 is covered on the overflow pipe 5, the top surface of the hardened layer 9 supports the cover body 6. In this embodiment, the hardened layer 9 is a mortar layer, and in order to make the cover body 6 cover the overflow pipe 5 more stably, the cover body 6 is fixedly connected to the hardened layer 9.
[0040] The implementation principle of the overflow structure of a rain garden in the present application embodiment is as follows: Figure 3-6 When the water level in the rain garden is lower than the overflow height of the overflow pipe 5, the rainwater can flow into the overflow pipe 5 and then into the overflow well 7.
[0041] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. An overflow structure of a rain garden, characterized in that: The invention comprises an impermeable layer (1), a crushed stone layer and a planting soil layer (4) which are laid in sequence from bottom to top, and an overflow pipe (5) pre-buried in the crushed stone layer, wherein the impermeable layer (1), the crushed stone layer and the planting soil layer (4) together form a rain garden, the top end of the overflow pipe (5) penetrates the planting soil layer (4) and extends to the top of the planting soil layer (4), the overflow pipe (5) is covered with a cover body (6), and the peripheral side of the cover body (6) is provided with a plurality of evenly distributed perforations (61).
2. The overflow structure of a rain garden according to claim 1, characterized in that: One end of the overflow pipe (5) away from the cover body (6) is connected to an overflow well (7), and the overflow well (7) is connected to a rainwater well via a pipeline.
3. The overflow structure of a rain garden according to claim 1, characterized in that: A hardened layer (9) is provided on the upper surface of the planting soil layer (4), and the top surface of the hardened layer (9) supports the cover body (6).
4. The overflow structure of a rain garden according to claim 3, characterized in that: The hardened layer (9) is fixedly connected to the cover body (6).
5. The overflow structure of a rain garden according to claim 1, characterized in that: The anti-seepage layer (1) is an anti-seepage geotextile.
6. The overflow structure of a rain garden according to claim 2, characterized in that: The crushed stone layer comprises a coarse crushed stone layer (2) laid on the upper surface of the anti-seepage layer (1) and a fine crushed stone layer (3) laid on the upper surface of the coarse crushed stone layer (2).
7. The overflow structure of a rain garden according to claim 6, characterized in that: A blind pipe (8) connected to the overflow well (7) is pre-buried in the coarse crushed stone layer (2).
8. The overflow structure of a rain garden according to claim 1, characterized in that: A plurality of overflow pipes (5) are provided.