CN211172270U

CN211172270U - Forebay rainwater garden system for large roof

Info

Publication number: CN211172270U
Application number: CN201921845076.9U
Authority: CN
Inventors: 王�华; 张兆昌; 张鹤林; 贾雁翔
Original assignee: Cas Building Design Research Institute Co ltd
Current assignee: Cas Building Design Research Institute Co ltd
Priority date: 2019-10-30
Filing date: 2019-10-30
Publication date: 2020-08-04
Anticipated expiration: 2029-10-30

Abstract

A forebay rainwater garden system for a large roof comprises a rain drop pipe, a forebay and a rainwater garden; the front pool is provided with a water discharge opening; the rainwater falling pipe is communicated with the inlet end of the forebay, and the outlet end of the forebay is communicated with the rainwater garden; the forebay inlet end and the forebay outlet end are both located at the upper end of the forebay, and the water discharge opening is located at the lower end of the forebay. The utility model aims at the forebay rainwater garden system of the large roof, clean rainwater of the roof rainwater after the early stage flow discarding can firstly flow into the forebay to be collected and recycled, and other water is saved; the design of the forebay reduces the water receiving amount of the rainwater garden, reduces the load of the rainwater garden, can reduce the floor area of the rainwater garden, and improves the water treatment amount of the low-influence development system; the overflow port is matched with the design of the forebay, so that the phenomenon of imbalance caused by overhigh rainfall of the rainwater garden can be effectively prevented, and the occurrence of waterlogging is reduced.

Description

Forebay rainwater garden system for large roof

Technical Field

The utility model relates to a rainwater field of collecting especially relates to a forebay rainwater garden system to big roofing.

Background

The rainwater garden is a shallow concave green land which is naturally formed or artificially excavated, is used for gathering and absorbing rainwater from a roof or the ground, purifies the rainwater through the comprehensive action of plants and sandy soil, gradually permeates the soil, contains underground water or supplies urban water such as landscape water, toilet water and the like, and is an ecologically sustainable rainwater control and rainwater utilization facility. The rainwater garden can be used for rainwater infiltration, and can effectively remove suspended particles, organic pollutants, heavy metal ions, pathogens and other harmful substances in runoff; through reasonable plant configuration, the rainwater garden can provide a good inhabitation environment for insects and birds; the humidity and the temperature of the air in the environment can be adjusted through the transpiration of the plants in the rainwater garden, and the microclimate environment is improved; the rainwater garden has lower construction cost and simpler maintenance and management than the lawn; compared with the traditional lawn landscape, the rain garden can give people new landscape perception and visual perception.

The low-impact development is an urban rainwater management concept which emphasizes small control facilities dispersed from the source, maintains and protects the natural hydrological function of a site, and effectively relieves the flood peak flow increase, runoff coefficient increase and non-point source pollution load aggravation caused by the increase of the impervious area. The low-influence development is an ecological technical system which can easily realize urban rainwater collection and utilization, and the key points of the system are in-situ collection, natural purification, nearby utilization or groundwater recharging.

The research on the hydrological effect of the rainwater garden is always a hot point of research, at present, the hydrological effect of the rainwater garden is mostly researched in China by changing the filler and changing the layer thickness to increase the infiltration capacity of the rainwater garden, but the problems of service life and filler replacement are still faced. Roof rainwater is used as relatively clean rainwater, if the rainwater is discharged into a drainage system, the treatment load of sewage treatment can be increased, in addition, the runoff of rainwater on a large roof is relatively large, a rainwater garden with a certain area needs to be arranged according to the rainwater storage and seepage capacity of the rainwater, and however, the rainwater garden which is enough for a place and can be stored in a large area can not be constructed in practice. The existing large roof rainwater is developed with low influence, namely, the rainwater is collected into a rainwater garden after being discharged and drained at the initial stage, the method brings certain challenge to the rainwater storage and seepage capability of the rainwater garden, and the rainwater garden imbalance phenomenon is often caused by large roof rainfall. And secondly, a large rainwater collecting facility is built underground for treatment and collection. The method has large construction area and excavation area, and occupies too much underground space. Therefore, how to reasonably develop the rainwater on the large-area roof with low influence is always a hot spot for discussion.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a forebay rainwater garden system to big roofing to solve the aforementioned problem that exists among the prior art.

In order to realize the purpose, the utility model discloses a technical scheme as follows:

a forebay rainwater garden system for a large roof comprises a rain drop pipe, a forebay and a rainwater garden; the front pool is provided with a water discharge opening; the rainwater falling pipe is communicated with the inlet end of the forebay, and the outlet end of the forebay is communicated with the rainwater garden; the forebay inlet end and the forebay outlet end are both located at the upper end of the forebay, and the water discharge opening is located at the lower end of the forebay.

Preferably, the rain drop pipe is connected with the forebay through a connecting pipe, and the forebay is connected with the rain garden through the connecting pipe.

Preferably, the rainwater gardens are sequentially from top to bottom: plant growing layer, matrix layer, sand layer and gravel layer.

Preferably, the upper end of the rainwater garden plant planting layer is provided with an overflow port, the substrate layer, the sand layer and the gravel layer are provided with sampling ports, and the lowest layer of the rainwater garden is provided with a perforated pipe.

Preferably, a pump is arranged in the forebay and is connected with a spraying or sprinkling irrigation device.

Preferably, when the front pool rainwater garden low-influence development system is used, rainwater after being abandoned flows into the front pool, and the front pool overflows into the rainwater garden after being filled.

The utility model has the advantages that: the utility model aims at the forebay rainwater garden system of the large roof, the forebay design is added in front of the rainwater garden, and firstly, the clean rainwater of the roof rainwater after the early drainage can flow into the forebay to be collected and reused, thereby saving other water; the design of the front pool reduces the water receiving amount of the rainwater garden, reduces the load of the rainwater garden, can reduce the floor area of the rainwater garden, and improves the water treatment amount of the low-influence development system; the overflow port is matched with the design of the three foreponds, so that the phenomenon of imbalance of the rainwater garden caused by overhigh rainfall can be effectively prevented, and the occurrence of waterlogging is reduced. The utility model can reduce the land area and the cost; but also can improve the water treatment efficiency and reduce the influence on the environment.

Drawings

Fig. 1 is a schematic view of a front pool rainwater garden installation location;

FIG. 2 is a schematic view of a forebay storm water garden configuration;

in the figure: 1-roof, 2-rain drop pipe, 3-forebay, 4-rain garden, 5 connecting pipes, 6-water outlet, 7-overflow outlet, 8-perforated pipe, 9-plant planting layer, 10-substrate layer, 11-sand layer, 12-gravel layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the invention, are given by way of illustration only.

A front pool rainwater garden system for a large roof is provided, the installation effect is shown in figure 1, and the front pool rainwater garden system comprises a rainwater falling pipe 2, a front pool 3 and a rainwater garden 4; the structural schematic diagram of the front pool rainwater garden is shown in fig. 2, the front pool 3 is provided with a front pool inlet end, a front pool outlet end and a water outlet 6; the front pool inlet end and the front pool outlet end are both positioned at the upper end of the front pool, and the water discharge opening 6 is positioned at the lower end of the front pool; the rain drop pipe 2 is communicated with the inlet end of the forebay through a connecting pipe 5, and the outlet end of the forebay is communicated with the rain garden 4 through the connecting pipe 5. The rainwater garden 4 comprises the following components in sequence from top to bottom: a plant planting layer 9, a substrate layer 10, a sand layer 11 and a gravel layer 12; the upper end of the plant planting layer 9 is provided with an overflow port 7, the substrate layer 10, the sand layer 11 and the gravel layer 10 are provided with sampling ports, and the lowest layer of the rainwater garden is provided with a perforated pipe 8. And a pump is arranged in the forebay and is connected with a spraying or sprinkling irrigation device.

When the front pool rainwater garden low-influence development system is used, rainwater enters the front pool 3 through the rainwater falling pipe 2 after being discharged for storage, and the rainwater overflows into the rainwater garden 4 through the connecting pipe 5 after the front pool 3 is filled with the rainwater and flows out through the overflow port 7 at the upper end of the rainwater garden 4; rainwater collected by the front pool 3 flows out of the drainage opening 6 for application, and water treated by the rainwater garden 4 flows out of the perforated pipe 8 for application; the overflow port 7, the water discharge port 6 and the perforated pipe 8 are all provided with control valves for controlling water flow.

Examples

In this embodiment, the rain barrel is used as the front pool 3, and the rain garden 4 is respectively provided with: a plant growing layer 9, a substrate layer 10, a sand layer 11 and a gravel layer 12. Planting iris, pennisetum purpureum and ophiopogon japonicus in the plant planting layer 9; the substrate layer 10 adopts geotextile permeable fabric, wherein soil is placed in a gauze with the thickness of 0.02mm, sand is placed in a gauze with the thickness of 0.075mm, and the proportion is 2: 3; the sand layer 11 adopts sand stone with the diameter of 10 mm; the gravel layer 12 uses gravel having a diameter of 50 mm. The substrate layer 10, the sand layer 11 and the gravel layer 12 can be sampled through the sampling port to detect the water treatment capacity of the rainwater garden 4, rainwater on the roof 1 is detected to flow into the rainwater barrel after being subjected to early rainwater discarding in the rainwater garden 4, when the rainwater is too large and the rainwater barrel is full of water, the overflowing rainwater flows into the rainwater garden 4 to be treated, and when the upper treatment limit of the rainwater garden 4 is reached, the control valve of the overflow port 7 can be opened to enable the water exceeding the upper treatment limit in the rainwater garden 4 to flow out, so that waterlogging of the rainwater garden 4 is prevented.

The lowest surface of the rain barrel is provided with a water drainage opening 6, so that water collected in the rain barrel can be conveniently led out for other purposes, and a water pump is further arranged in the rain barrel, so that the rain water stored in the rain barrel can be pumped out for other purposes such as road spraying, sprinkling irrigation and the like, and water resources are saved.

Through adopting the utility model discloses an above-mentioned technical scheme has obtained following profitable effect:

the utility model aims at the forebay rainwater garden system of the large roof, the forebay design is added in front of the rainwater garden, and firstly, the clean rainwater of the roof rainwater after the early drainage can flow into the forebay to be collected and reused, thereby saving other water; the design of the front pool reduces the water receiving amount of the rainwater garden, reduces the load of the rainwater garden, can reduce the floor area of the rainwater garden, and improves the water treatment amount of the low-influence development system; the overflow port is matched with the design of the three foreponds, so that the phenomenon of imbalance of the rainwater garden caused by overhigh rainfall can be effectively prevented, and the occurrence of waterlogging is reduced. The utility model can reduce the land area and the cost; but also can improve the water treatment efficiency and reduce the influence on the environment.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be viewed as the protection scope of the present invention.

Claims

1. A forebay rainwater garden system for a large roof is characterized by comprising a rain drop pipe, a forebay and a rainwater garden; the front pool is provided with a water discharge opening; the rainwater falling pipe is communicated with the inlet end of the forebay, and the outlet end of the forebay is communicated with the rainwater garden; the front pool inlet end and the front pool outlet end are both positioned at the upper end of the front pool, and the water discharge opening is positioned on the side face of the lowest end of the front pool.

2. A forebay rain garden system for a large roof area as claimed in claim 1, where the rain drop pipe is connected to the forebay by a connecting pipe, and where the forebay and the rain garden are connected by the connecting pipe.

3. Front pool rainwater garden system for large roofs according to claim 1, characterized in that said rainwater gardens are, from top to bottom: plant growing layer, matrix layer, sand layer and gravel layer.

4. The large roof forebay rainwater garden system according to claim 3, wherein said rainwater garden plant growing layer is provided with an overflow port at its upper end, said substrate layer, said sand layer and said gravel layer are provided with a sampling port, and said rainwater garden is provided with a perforated pipe at its lowermost end.

5. A forebay rainwater garden system for a large roof as claimed in claim 1, where a pump is provided within the forebay, the pump being connected to a spray or sprinkler apparatus.

6. The front pool rainwater garden system for large roof coverings of claim 1, wherein when the front pool rainwater garden low impact development system is in use, rainwater after abandoning flows enters the front pool, and the front pool overflows to the rainwater garden after being full.