CN207553247U - Recessed greenery patches rainwater utilization and collection system - Google Patents

Abstract

The utility model relates to a rainwater utilization and collection system for sunken green areas. The green area system includes a gravel layer, a sand layer, an artificial filler layer, a planting soil layer, a litter and fallen leaf degradation layer and pebbles that are sequentially arranged from bottom to top. The water weir and the gravel layer are provided with perforated pipes for collecting water, and the perforated pipes are connected to the rainwater reuse treatment device; the rainwater reuse treatment device includes a grit chamber, a disinfection tank, a water storage tank, and a grit chamber The rainwater inlet is connected to the water collection perforated pipe, the sediment filter device is installed on the water pipeline between the grit chamber and the disinfection tank, and the filter screen is installed on the water pipeline between the disinfection tank and the water storage tank. The utility model adopts a variety of structural layers to filter and store the collected rainwater naturally layer by layer, so as to replenish groundwater and then conserve water resources; when there is a requirement for reuse, the rainwater can be treated, and then the rainwater can be reused. Used as miscellaneous water in buildings, communities or other aspects.

Description

Rainwater utilization and collection system for sunken green land

technical field

The utility model relates to a rainwater collection and comprehensive utilization system, in particular to a rainwater utilization and collection system based on concave green land.

Background technique

The sunken green space is a shallow concave green space constructed by artificial excavation. It is used to gather and absorb rainwater from the roof or the ground. Through the comprehensive action of plants and sand, the rainwater is purified and gradually infiltrated into the soil, conserving groundwater, or making it It is an ecologically sustainable rainwater control and rainwater utilization technical facility to supply landscape water, toilet water and other urban water.

At present, there are problems such as incomplete collection of rainwater and unreasonable utilization methods in shallow concave green land rainwater utilization facilities. CN201621364951.8 discloses a sunken green space rainwater collection and utilization system. The existing problems are: (1) When the intensity of the rainstorm is high, the runoff of the sunken green space cannot meet the intensity of the heavy rain, causing rainwater to overflow the sunken green space, and cannot obtain Fully collect; (2) The structure of the rainwater seepage and drainage layer of the sunken green space cannot effectively filter impurities and particulate matter in the rainwater, which may easily cause the filter to be blocked and often need to be cleaned.

Utility model content

The technical problem to be solved by the utility model is to provide a rainwater utilization and collection system for sunken green land, which adopts multiple structural layers in a certain green area to be arranged vertically, and naturally filters and stores the collected rainwater layer by layer. It is used to replenish groundwater and then conserve water resources; when there is a requirement for reuse, water collection perforated pipes can be embedded in the gravel layer to treat rainwater, thereby realizing reuse of rainwater. It can be used in buildings, communities or other aspects as miscellaneous Water is used, the structure of the facility is simple, and it is easy to set up.

The technical scheme that the utility model solves its technical problem adopts is:

A sunken green space rainwater utilization and collection system, including a green space system and a rainwater reuse treatment device, the green space system includes a gravel layer, a sand layer, an artificial filler layer, a planting soil layer, and dead branches sequentially arranged from bottom to top A water retaining weir composed of fallen leaf degradation layer and pebbles, a water-collecting perforated pipe is arranged in the gravel layer, and the water-collecting perforated pipe is connected to a rainwater reuse treatment device; the rainwater reuse treatment device includes grit chambers sequentially connected by water pipelines , disinfection tank, water storage tank, the rainwater inlet of the grit chamber is connected to the water collection perforated pipe, the sediment filter device is installed on the water delivery pipeline between the grit chamber and the disinfection tank, and the water delivery pipeline between the disinfection tank and the water storage tank is installed Filter.

Adopt the utility model of above-mentioned technical scheme, compared with prior art, its beneficial effect is:

Using a variety of structural layers to naturally filter and store the collected rainwater layer by layer, which is conducive to the open space to receive and store rainwater, so as to reduce runoff and outflow; after rainwater is reused and treated, it is combined with other water systems to save water resources; The original water ecology of the sunken green land is not changed, and the impact on the surrounding water ecological environment is the lowest; the combination of rainwater utilization and landscape design maximizes the visual and recreational value of the development and construction.

A further preferred solution is:

There are grass planting ditch around the green space system. By constructing several grass planting ditches around the sunken green space, more rainwater can be brought in and the aesthetics can be increased.

An overflow pipe is provided at the high water level of the water retaining weir, the overflow pipe is connected to the outdoor reservoir, and one end of the overflow pipe is wrapped with gauze. By setting the overflow pipe and the outdoor water storage tank, excess rainwater can be discharged into the outdoor water storage tank through the overflow pipe.

Small holes are arranged on the water-collecting perforated pipe, and gauze is wrapped outside the small holes. Through this measure, it is convenient for water to enter and avoid mixing sand and soil.

The storage tank is provided with a water pump and an overflow port. The rainwater is raised through the water pump, and it is used in places that do not require high water quality.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment;

In the figure: 1- overflow pipe; 2- gauze; 3- grass planting ditch; 4- retaining weir; 5- litter degradation layer; 6- planting soil layer; 7- artificial filling layer; 8- sand layer; 9 -gravel layer; 10-water collection perforated pipe; 11-small hole; 12-grit chamber; 13-sediment filter device; 14-disinfection pool; 15-filter; 16-water storage tank; 17-water pump; 18- Overflow.

Detailed ways

The utility model is described in detail below in conjunction with accompanying drawings and embodiments.

Referring to Fig. 1, a rainwater utilization and collection system for sunken green land, the green land system consists of a gravel layer 9, a sand layer 8, an artificial filler layer 7, a planting soil layer 6, and a litter degradation layer 5 arranged sequentially from bottom to top 1. The water retaining weir 4 is composed of a water-collecting perforated pipe 10 arranged in the gravel layer 9, and the water-collecting perforated pipe 10 is connected to a rainwater reuse treatment device.

The water retaining weir 4 is a water storage groove formed by cobblestones or other large stones, and the water storage depth is 300mm; function: the water retaining weir 4 provides a temporary storage space for the rainstorm, and the rainwater is preferentially retained in the retaining wall when it rains. In the water weir 4, the rainwater is filtered through the action of plants, and the sediment in the rainwater is left here at the same time; although the depth of the water retaining weir 4 increases, the water storage capacity is stronger, but the increase of the depth of the water retaining weir 4 requires higher infiltration capacity, and it is not conducive to plant growth, so it is best to choose a water storage depth of 300mm.

In order to prevent excessive rainwater from overflowing the concave green space, an overflow pipe 1 is provided at the high water level of the weir 4, and the overflow pipe 1 is connected to the outdoor reservoir 19, and one end of the overflow pipe 1 is wrapped with gauze 2 , in case the overflow pipe 1 is blocked. Overflow pipe 1 can choose PVC plastic pipe or PPR pipe, and gauze 2 can choose thin mesh gauze.

The litter degrading layer 5 is a layer of about 80mm thick dead branches and some plant leaves, pine stalks, and wood chips laid between the top of the planting soil layer 6 and the roots of the plants after the plants are planted on the planting soil layer 6. and broken wood; the litter degradation layer 5 can provide a good microbial environment, which is conducive to the growth of microorganisms and the degradation of organic matter, further purifies the rainwater, and can maintain the humidity of the soil at the same time, avoiding the reduction of the permeability of the surface soil due to compaction, and It also helps to resist the erosion of runoff rainwater and prevent soil erosion.

The planting soil layer 6 is a layer of sandy soil with a thickness of about 50 cm and a relatively large permeability coefficient spread on the artificial filler layer 7. The content of sand in its main components is 60% to 85%, and the content of organic components 5% to 10%, and the clay content does not exceed 5%. This helps infiltration of rainwater, ensures air permeability, and allows plants to adapt to the local growth environment faster. The specific thickness of the planting soil layer 6 can be determined according to the type of plant selected.

The artificial filler layer 7 is a layer of natural or artificial materials with strong permeability composed of seepage bricks, hollow bricks or large stones laid above the sand layer 8, and then add organic matter such as sand, sawdust, wood chips, etc.; the artificial filler layer 7 The thickness is preferably about 100cm; the artificial filler layer 7 can not only support the planting soil layer 6, but also reduce runoff pollution through the physical, chemical and microbial comprehensive effects of the filler layer, and prevent the planting soil layer 6 from flowing away with the rainwater.

The sand layer 8 is a layer of coarse-grained stones placed flatly above the gravel layer 9, with a thickness of about 15 cm; the sand layer 8 can prevent soil particles from entering the gravel layer 9 to block the water collection perforated pipe 10, and can also play a role in ventilation. effect.

The gravel layer 9 is to place a layer of pebbles flatly at the bottom of the dug pit as the bottom foundation for collecting and discharging rainwater after purification. In the gravel layer 9, use three PVC plastic pipes as the water collection perforated pipe 10 to connect into a three-way pipe form, two plastic pipes are placed horizontally, and one is placed vertically, and the rainwater from the horizontally placed plastic pipes is collected into the vertical plastic pipes In the end, all rainwater collected in the gravel layer 9 is drained by vertical pipes. There must be a certain distance between the two horizontally placed plastic pipes and the bottom, and many small holes 11 are punched in the upper half of the two horizontal pipe walls and around the vertical pipe walls and wrapped with emery cloth, which is convenient for rainwater to enter the water collection perforation Pipe 10 prevents the bottom silt from entering the water-collecting perforated pipe 10 again.

In addition, several grass planting ditches 3 can be built around the sunken green space to introduce more rainwater and increase the aesthetics.

Still referring to Fig. 1, the rainwater reuse treatment device comprises facilities such as a grit chamber 12, a disinfection pond 14, and a water storage tank 16. The rainwater inlet of 12 is connected to the water collecting perforated pipe 10, the sediment filter 13 is arranged on the water delivery pipeline between the grit chamber 12 and the disinfection tank 14, and the filter screen is arranged on the water delivery pipeline between the disinfection tank 14 and the water storage tank 16 15. The water storage tank 16 is provided with a water pump 17 and an overflow port 18.

The process flow of rainwater reprocessing is: rainwater→grit chamber 12→pipeline→sediment filter device 13→disinfection pond 14→pipeline→water storage tank 16→lift pump 17→used for other purposes. The collected water is filtered for the first time through the grit chamber 12, and then the rainwater is reprocessed through the mud filter device 13. The treated water is disinfected in the disinfection tank 14. Chlorine tablets can be used as a disinfectant, and finally filtered through two ends. The pipeline of the net 15 flows into the water storage tank 16 (with an overflow port 18), and is lifted and utilized by a lift pump 17.

After simple treatment again, the rainwater can be used for reuse and recycling of rainwater for purposes that do not require high water quality, such as water for greening, water for municipal roads, water for car washing, etc.

The above descriptions are only preferred and feasible embodiments of the present utility model, and are not intended to limit the scope of rights of the present utility model. within the scope of rights.

Claims (5)

1. A sunken green space rainwater utilization and collection system, comprising a green space system and a rainwater reuse treatment device, is characterized in that: the green space system includes a gravel layer (9), a sand layer (8) arranged sequentially from bottom to top ), an artificial filler layer (7), a planting soil layer (6), a litter degradation layer (5) and a water retaining weir (4) composed of pebbles, and a water collection perforated pipe (10) is set in the gravel layer (9), The water collection perforated pipe (10) is connected to the rainwater reuse treatment device; the rainwater reuse treatment device includes a grit chamber (12), a disinfection tank (14), and a water storage tank (16), which are sequentially connected by water pipelines. The rainwater inlet of the sand tank (12) is connected to the water collection perforated pipe (10), and the sediment filter device (13) is installed on the water delivery pipeline between the grit chamber (12) and the disinfection tank (14), and the disinfection tank (14) A filter screen (15) is set on the water pipeline between the water storage tank (16). 2. The rainwater utilization and collection system for sunken green space according to claim 1, characterized in that: there are grass planting ditch (3) around the green space system. 3. The rainwater utilization and collection system for sunken green spaces according to claim 1, characterized in that: an overflow pipe (1) is provided at the high water level of the water retaining weir (4), and the overflow pipe (1) is connected to the outdoor The reservoir (19), one end of the overflow pipe (1) is wrapped with gauze (2). 4. The rainwater utilization and collection system for sunken green space according to claim 1, characterized in that: small holes (11) are set on the water collection perforated pipe (10), and the small holes (11) are wrapped with gauze. 5. The rainwater utilization and collection system for sunken green spaces according to claim 1, characterized in that: the water storage tank (16) is provided with a water pump (17) and an overflow port (18).