Overflow discharge facility externally connected with rainwater vertical pipe

Abstract

The utility model relates to an overflow drainage facility externally connected with a rainwater vertical pipe, which belongs to the technical field of building drainage and comprises a bottom plate, an overflow drainage well arranged on the top surface of the bottom plate, a fine aggregate concrete cushion layer laid on the top surface of the bottom plate and positioned in the overflow drainage well, and a gravel layer laid on the top surface of the fine aggregate concrete cushion layer, a first hole is formed in one side of the overflow discharge well, a second hole located below the first hole is formed in the side, away from the first hole, of the overflow discharge well, a rainwater vertical pipe body is fixedly connected to the interior of the first hole, and the end, away from the overflow discharge well, of the rainwater vertical pipe body is located indoors. And the overflow discharge well is pre-buried in the rainwater garden. The rainwater purification device has the effects that rainwater can be effectively filtered and purified, and therefore pollutants permeating into underground water are reduced.

Description

Technical Field

[0001] This application relates to the technical field of building drainage, and in particular to an overflow discharge facility for an externally connected rainwater downpipe. Background Technology

[0002] Stormwater drainage systems are an important part of urban infrastructure, especially in rainy areas, where efficient stormwater drainage is crucial for preventing urban flooding and ensuring public safety.

[0003] Among existing rainwater drainage technologies, common treatment methods include direct discharge through rainwater downpipes. Rainwater downpipes are usually installed on the exterior walls of buildings to quickly lead rainwater from the roof to the ground or underground pipes, but this method cannot effectively purify rainwater. Utility Model Content

[0004] In order to effectively filter and purify rainwater, thereby reducing the infiltration of pollutants into groundwater, this application provides an overflow discharge facility for an external rainwater downpipe.

[0005] The overflow discharge facility for an external rainwater downpipe provided in this application adopts the following technical solution:

[0006] An overflow discharge facility for an externally connected rainwater downpipe includes a base plate, an overflow discharge well disposed on the top surface of the base plate, a fine stone concrete pad layer disposed on the top surface of the base plate and located inside the overflow discharge well, and a gravel layer disposed on the top surface of the fine stone concrete pad layer. A first opening is provided on one side of the overflow discharge well, and a second opening is provided on the side of the overflow discharge well away from the first opening, located below the first opening. A rainwater downpipe body is fixedly connected inside the first opening. The end of the rainwater downpipe body away from the overflow discharge well is located indoors. The facility also includes a rain garden, and the overflow discharge well is pre-embedded inside the rain garden.

[0007] By adopting the above technical solutions, rainwater collected by the rainwater downpipe can be guided to the rain garden through the overflow discharge well, realizing the effective discharge and utilization of rainwater; the multi-layer structure inside the rain garden can effectively filter and purify rainwater, thereby reducing the infiltration of pollutants into the groundwater; at the same time, the gravel layer performs preliminary filtration and energy dissipation of rainwater, reducing the impact of rainwater on the base plate.

[0008] Preferably, the rain garden also has an overflow well pre-embedded inside, and the elevation of the top of the overflow well is higher than the elevation of the top of the overflow discharge well.

[0009] By adopting the above technical solution, the overflow well pre-embedded inside the rain garden can effectively prevent rainwater in the rain garden from flowing back into the overflow discharge well, ensuring that rainwater flows smoothly from the rain garden into the rain well; at the same time, the top elevation of the overflow well is higher than the top elevation of the overflow discharge well, further ensuring that rainwater will not flow back into the overflow discharge well due to external pressure, thus improving the reliability and stability of the system.

[0010] Preferably, the inner wall of the overflow discharge well is coated with a waterproof cement mortar layer.

[0011] By adopting the above technical solutions, the waterproof cement mortar layer can effectively reduce the erosion of the overflow discharge well by rainwater, extend the service life of the facility, and improve the overall waterproof performance of the facility.

[0012] Preferably, the top of the overflow discharge well is covered with a rainwater grate.

[0013] By adopting the above technical solutions, rainwater grates can effectively reduce the entry of external debris into the overflow discharge well, ensuring the unobstructed flow of the drainage system, while also providing a certain degree of safety protection to prevent accidental falls.

[0014] Preferably, a wastewater interception basket supported by the gravel layer is placed inside the gravel layer.

[0015] By adopting the above technical solution, the intercepting baskets placed in the gravel layer can effectively intercept large particulate impurities carried by rainwater, effectively reducing the entry of these impurities into the bottom layer of the rain garden, thereby protecting the soil and underground drainage system of the rain garden from pollution; at the same time, the intercepting baskets can be lifted and cleaned regularly to ensure the long-term stable operation of the system.

[0016] Preferably, the outer wall of the intercepting basket is fixedly connected with a permeable geotextile.

[0017] By adopting the above technical solutions, the installation of permeable geotextiles can effectively reduce the rate of rainwater infiltration and discharge, while intercepting pollutants in rainwater, effectively reducing the inflow of pollutants into groundwater, and improving the quality of rainwater treatment.

[0018] Preferably, the rain garden includes an impermeable layer, a gravel layer and a planting soil layer laid from bottom to top, wherein a blind pipe is pre-embedded in the gravel layer and the blind pipe is connected to the overflow well.

[0019] By adopting the above technical solutions, the impermeable layer of the rain garden effectively reduces the infiltration and diffusion of moisture, chemicals, or particulate matter in the rain garden soil, ensuring the stability and ecological function of the rain garden; the gravel layer not only enhances the filtration and purification of rainwater, but also increases the infiltration rate of rainwater and accelerates the discharge of rainwater; the blind pipes pre-buried in the gravel layer have extremely high surface water permeability and internal water flow capacity, which can quickly discharge the rainwater that has infiltrated into the gravel layer into the overflow well, and finally discharge it into the rainwater well, improving the drainage efficiency and reliability of the entire system.

[0020] In summary, this application includes at least one of the following beneficial technical effects:

[0021] 1. Rainwater collected by the downpipe can be guided to the rain garden through the overflow discharge well, realizing the effective discharge and utilization of rainwater; the multi-layer structure inside the rain garden can effectively filter and purify rainwater, thereby reducing the infiltration of pollutants into the groundwater; at the same time, the gravel layer performs preliminary filtration and energy dissipation of rainwater, reducing the impact of rainwater on the base plate.

[0022] 2. The intercepting baskets placed within the gravel layer can effectively intercept large particles of impurities carried by rainwater, effectively reducing the entry of these impurities into the bottom layer of the rain garden, thereby protecting the soil and underground drainage system of the rain garden from pollution; at the same time, the intercepting baskets can be lifted and cleaned regularly to ensure the long-term stable operation of the system.

[0023] 3. The impermeable layer of the rain garden effectively reduces the infiltration and diffusion of moisture, chemicals, or particulate matter in the soil, ensuring the stability and ecological function of the rain garden; the gravel layer not only enhances the filtration and purification of rainwater, but also increases the infiltration rate of rainwater and accelerates its discharge; the blind pipes pre-buried in the gravel layer have extremely high surface water permeability and internal water flow capacity, which can quickly discharge the rainwater that has infiltrated into the gravel layer into the overflow well, and finally into the rainwater well, improving the drainage efficiency and reliability of the entire system. Attached Figure Description

[0024] Figure 1 This is a cross-sectional view of the overflow discharge well of this application.

[0025] Figure 2 This is a structural diagram of a rain garden, overflow drain, and overflow well.

[0026] Explanation of reference numerals in the attached drawings: 1. Base plate; 2. Overflow discharge well; 21. First opening; 22. Second opening; 23. Leveling layer; 24. Rain grate; 25. Rainwater downpipe body; 3. Fine stone concrete cushion layer; 4. Sewage interception basket; 41. Gravel layer; 5. Building exterior wall; 51. Pipe clamp; 6. Seepage prevention layer; 61. Crushed stone layer; 611. Blind pipe; 612. Fixed pipe; 62. Planting soil layer; 63. Overflow well. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0028] This application discloses an overflow discharge facility for an externally connected rainwater downpipe. (Refer to...) Figure 1 and Figure 2 The overflow discharge facility for the external rainwater downpipe includes a base slab 1, an overflow discharge well 2 installed on the top surface of the base slab 1, a fine aggregate concrete pad 3 laid on the top surface of the base slab 1 and located inside the overflow discharge well 2, a gravel layer 41 laid on the top surface of the fine aggregate concrete pad 3, and a intercepting basket 4 placed inside the gravel layer 41 and supported by the gravel layer 41; the periphery of the intercepting basket 4 matches the inner wall of the overflow discharge well 2. A first opening 21 is provided on one side of the overflow discharge well 2, and a second opening 22 is provided on the side of the overflow discharge well 2 away from the first opening 21, located below the first opening 21. The top surface of the fine aggregate concrete pad 3 is flush with the bottom of the inner wall of the second opening 22. A rainwater downpipe body 25 is fixedly connected inside the first opening 21, and the end of the rainwater downpipe body 25 away from the overflow discharge well 2 is clamped to the side of the building exterior wall 5 facing the interior by a pipe clamp 51.

[0029] In this embodiment, the base plate 1 is a concrete slab, the overflow discharge well 2 is made of bricks, and the inner wall of the overflow discharge well 2 is coated with a leveling layer 23, which is a waterproof cement mortar layer; the top of the overflow discharge well 2 is covered with a rainwater grate 24. In order to reduce the rainwater infiltration and discharge rate and intercept pollutants, the outer wall of the intercepting basket 4 is fixedly connected with a permeable geotextile.

[0030] During construction, overflow discharge facilities can be pre-embedded in the rain garden. The rain garden includes an impermeable layer 6, a gravel layer 61, and a planting soil layer 62 laid from bottom to top. The impermeable layer 6 is an impermeable geotextile, which can minimize the infiltration and diffusion of water, chemicals, or particulate matter in the rain garden soil. Gravel is laid on the upper surface of the impermeable geotextile, thus forming the gravel layer 61 on the upper surface of the impermeable geotextile. Then, planting soil is laid on the upper surface of the gravel layer 61, thus forming the planting soil layer 62 on the gravel layer 61. This allows the rain garden formed by the impermeable layer 6, the gravel layer 61, and the planting soil layer 62 to have the function of infiltrating rainwater.

[0031] An overflow well 63 is pre-embedded inside the rain garden, and the top elevation of the overflow well 63 is higher than the top elevation of the overflow discharge structure. A blind pipe 611 is pre-embedded in the gravel layer 61, and the blind pipe 611 is connected to the overflow well 63; the overflow well 63 is connected to a rainwater well (not shown in the figure) through a fixed pipe 612. The blind pipe 611 has extremely high surface water permeability and internal water flow capacity, thereby enabling rainwater that infiltrates into the gravel layer 61 to be discharged into the overflow well 63, and then discharged into the rainwater well through the overflow well 63.

[0032] The implementation principle of an overflow discharge facility for an external rainwater downpipe in this application embodiment is as follows: the rainwater downpipe body 25 is located indoors and is buried underground. When the rainwater downpipe body 25 is connected to the overflow discharge well 2 in the rain garden, the rainwater is guided into the overflow discharge well 2 so that the rainwater overflows from the well opening of the overflow discharge well 2 and is then guided to the rain garden.

[0033] Among them, after the rainwater enters the overflow discharge well 2, a small portion of the rainwater slowly seeps down from the second opening 22 to the crushed stone layer 61 through the permeable geotextile and gravel layer 41, and is discharged into the overflow well 63 through the blind pipe 611, while the remaining rainwater overflows upward into the rain garden.

[0034] Since the top elevation of overflow well 63 is higher than that of overflow well 2, rainwater from the rain garden is prevented from flowing back into overflow well 2. The gravel layer 41 at the bottom of overflow well 2 can dissipate energy from rainwater, and the permeable geotextile can reduce the rate of rainwater infiltration and discharge and intercept pollutants. For later maintenance, the intercepting basket 4 installed inside overflow well 2 will be cleaned and maintained.

[0035] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An overflow discharge facility for an externally connected rainwater downpipe, characterized in that: The system includes a base plate (1), an overflow drain well (2) set on the top surface of the base plate (1), a fine stone concrete cushion layer (3) laid on the top surface of the base plate (1) and located inside the overflow drain well (2), and a gravel layer (41) laid on the top surface of the fine stone concrete cushion layer (3). A first opening (21) is provided on one side of the overflow drain well (2), and a second opening (22) is provided on the side of the overflow drain well (2) away from the first opening (21) located below the first opening (21). A rainwater downpipe body (25) is fixedly connected inside the first opening (21). The end of the rainwater downpipe body (25) away from the overflow drain well (2) is located indoors. The system also includes a rain garden, and the overflow drain well (2) is embedded inside the rain garden.

2. The overflow discharge facility for an external rainwater downpipe according to claim 1, characterized in that: The rain garden is also pre-embedded with an overflow well (63), the top elevation of which is greater than the top elevation of the overflow discharge well (2).

3. The overflow discharge facility for an external rainwater downpipe according to claim 1, characterized in that: The inner wall of the overflow discharge well (2) is coated with a waterproof cement mortar layer.

4. The overflow discharge facility for an external rainwater downpipe according to claim 1, characterized in that: The top of the overflow discharge well (2) is covered with a rainwater grate (24).

5. The overflow discharge facility for an external rainwater downpipe according to claim 1, characterized in that: A wastewater interception basket (4) supported by the gravel layer (41) is placed inside the gravel layer (41).

6. The overflow discharge facility for an external rainwater downpipe according to claim 5, characterized in that: The outer wall of the intercepting basket (4) is fixedly connected with a permeable geotextile.

7. The overflow discharge facility for an external rainwater downpipe according to claim 2, characterized in that: The rain garden includes an impermeable layer (6), a gravel layer (61) and a planting soil layer (62) laid from bottom to top. A blind pipe (611) is pre-embedded in the gravel layer (61) and the blind pipe (611) is connected to the overflow well (63).

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