CN113216320B - Rainwater ecological purification and collection utilization system suitable for low greenbelt rate - Google Patents
Rainwater ecological purification and collection utilization system suitable for low greenbelt rate Download PDFInfo
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- CN113216320B CN113216320B CN202110552307.2A CN202110552307A CN113216320B CN 113216320 B CN113216320 B CN 113216320B CN 202110552307 A CN202110552307 A CN 202110552307A CN 113216320 B CN113216320 B CN 113216320B
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- 238000000746 purification Methods 0.000 title claims abstract description 47
- 238000004146 energy storage Methods 0.000 claims abstract description 46
- 238000005381 potential energy Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 43
- 238000009933 burial Methods 0.000 abstract description 4
- 238000003860 storage Methods 0.000 description 12
- 238000005406 washing Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000003973 irrigation Methods 0.000 description 3
- 230000002262 irrigation Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 244000025254 Cannabis sativa Species 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
- E03B3/02—Methods or installations for obtaining or collecting drinking water or tap water from rain-water
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
- E04D13/04—Roof drainage; Drainage fittings in flat roofs, balconies or the like
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/108—Rainwater harvesting
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Abstract
The invention relates to a rainwater ecological purification, collection and utilization system suitable for low greenbelt rate. The roof rainwater collecting unit comprises a collecting vertical pipe, a pressure discharge pipe and an energy storage pressure tee joint, the collecting vertical pipe is communicated with the pressure discharge pipe, the pressure discharge pipe is horizontally laid, the collecting vertical pipe is vertically laid, an outlet of the collecting vertical pipe is hermetically connected with the pressure discharge pipe and is not connected with the atmosphere, and the potential energy of roof rainwater is utilized to push rainwater in the horizontally laid pressure discharge pipe so that the discharged rainwater has pressure; the rainwater collecting device has the advantages that the rainwater on the roof collected by the collecting vertical pipe has certain potential energy, the end burial depth of the pressure discharge pipe is reduced, the burial depth cost of the pressure discharge pipe is saved, and the rainwater collecting device is simple in structure, high in reliability and easy to popularize.
Description
Technical Field
The invention relates to the field of urban rainwater collection and utilization, in particular to a rainwater ecological purification, collection and utilization system suitable for low greenbelt rate.
Background
With the rapid development of economy and the continuous increase of population, the urbanization speed is continuously accelerated, on one hand, the urban water demand is increased, on the other hand, the corresponding global warming is realized, and the more frequent extreme weather continuously causes the urban water resource shortage, flood disasters and ecological environment to be seriously damaged. Therefore, the function of rainwater circulation is increasingly prominent in urban construction, rainwater is used as a precious fresh water resource, the pollution degree is light, and the rainwater can be used for urban greening, irrigation, car washing and other water sources and can also be used for supplementing underground water after being simply treated. Therefore, the reasonable utilization of the rainwater resource has important significance.
Among the prior art, there is a rainwater collection system, collects the rainwater as required. Chinese patent 'CN 105839755A' discloses a urban rainwater collection and reuse system, which relates to an impact-resistant rainwater ecological utilization system for green communities, and consists of a building rainwater pipe, a drainage side ditch, a drainage well, a permeation well, a concave greenbelt, a grass planting shallow trench, a landscape water body, a water pump, a water distribution pipe and a ground hydrant; should can carry out effective collection to the rainwater and utilize, the water economy resource provides certain afforestation, nevertheless has that the structure is complicated, comprehensive cost is higher, is unfavorable for not enough such as actual popularization and application.
Disclosure of Invention
In view of the above, there is a need to provide an ecological rainwater purification and collection and utilization system suitable for low greenbelt rate, which has a simple structure and utilizes the potential energy of rainwater to realize rainwater transportation.
The invention provides a rainwater ecological purification, collection and utilization system suitable for low greenbelt rate, which comprises: the roof rainwater collecting unit is used for collecting roof rainwater; the roof rainwater collecting unit comprises a collecting vertical pipe, a pressure discharge pipe and an energy storage pressure tee joint, the collecting vertical pipe is communicated with the pressure discharge pipe, the pressure discharge pipe is horizontally laid, the collecting vertical pipe is vertically laid, an outlet of the collecting vertical pipe is hermetically connected with the pressure discharge pipe and is not connected with the atmosphere, so that the potential energy of roof rainwater can be utilized to push rainwater in the horizontally laid pressure discharge pipe, and the discharged rainwater has pressure; the roof rainwater collecting unit is connected to the ecological purification unit, and the energy storage pressure tee joint is arranged between the collecting vertical pipe and the ecological purification unit; and the road surface rainwater collecting unit comprises a drainage ditch, and the drainage ditch is communicated with the ecological purification unit.
So set up, through the airtight setting that links to each other of collection riser and pressure discharge pipe's inlet side for the roofing rainwater of collecting the riser and collecting has certain potential energy, has realized the terminal buried depth of pressure discharge pipe and has reduced, and then practices thrift pressure discharge pipeline buried depth cost, and this system simple structure, the reliability is high, easily promotes.
In one embodiment of the invention, the ecological purification unit comprises a rainwater garden and a reservoir arranged in the rainwater garden, part of the roof rainwater collected by the roof rainwater collection unit is discharged into the rainwater garden, and the rest part of the roof rainwater is discharged into the reservoir.
By the arrangement, the collected roof rainwater can be directly drained into the rainwater garden by arranging the rainwater garden, so that ecological purification of the rainwater is realized; by arranging the water storage tank, collected roof rainwater can be discharged into the water storage tank, and the rainwater can be stored, so that different parts of rainwater can be separately treated, and the rainwater utilization effect is improved; the rainwater garden and the reservoir can improve the utilization rate of urban water resources and increase the biological diversity.
In one embodiment of the invention, the roof rainwater collecting unit further comprises a flow discarding device, an inlet of the flow discarding device is communicated with the pressure discharge pipe, the roof rainwater collected by the roof rainwater collecting unit is divided into early-stage rainwater and middle-later-stage rainwater, when the roof rainwater can flow into the flow discarding device, the part of the rainwater is the early-stage rainwater, and the early-stage rainwater is discharged to the rainwater garden through the flow discarding device; the rest part of roof rainwater is middle and later stage rainwater, and the middle and later stage rainwater is discharged into the reservoir.
So set up, earlier stage rainwater flow is less, pollutes more seriously, abandons class earlier stage rainwater through setting up and abandons class device, will abandon class earlier stage rainwater and arrange into the rainwater garden, arrange all the other rainwater into the cistern and store, wait for the reutilization, realized will polluting the separation of comparatively serious earlier stage rainwater and comparatively clean middle and later stage rainwater, improved the comprehensive utilization to the roofing rainwater, practice thrift roofing rainwater resource.
In one embodiment of the invention, the roof rainwater collecting unit is further provided with a manhole, and the manhole is communicated with the energy storage pressure tee joint.
So set up, through setting up the manhole, when non-rainy day, clear logical and regularly overhaul energy storage pressure tee bend through the manhole, solve energy storage pressure tee bend and block up or the trouble problem, improve energy storage pressure tee bend reliability.
In one embodiment of the invention, the energy storage pressure tee is a pressure tee.
So set up, through the setting of energy storage pressure tee bend to make roofing rainwater collection unit can realize the energy storage effect and can set up the access hole again, and then simplified roofing rainwater collection unit's structure.
In one embodiment of the invention, the reservoir is provided with an overflow port, and the overflow port is communicated with the river channel.
So set up, through setting up the overflow mouth, when meetting the great weather of rainfall, the storage water flat line of cistern surpasses the position of overflow mouth has solved the problem of spilling over when the rainwater surpasses the biggest memory space of cistern in the cistern, avoids the cistern to cause the waterlogging, promotes the friendly nature of cistern to ecological environment.
In one embodiment of the invention, the rainwater collection unit comprises a plurality of said collection risers arranged in parallel and all communicating with said pressure discharge pipe.
According to the arrangement, on one hand, a plurality of collecting vertical pipes are arranged in the same building, so that water can be drained in time when rainstorm occurs, and the problem of water accumulation caused by incapability of draining water in time is avoided; on the other hand, the collecting vertical pipes are respectively arranged on a plurality of buildings and are arranged in parallel and communicated with the pressure discharge pipe, so that the use number of the energy storage pressure tee joints and the laying length of the pressure discharge pipe are reduced, and the use cost of materials is reduced.
In one embodiment of the invention, the road surface rainwater collection unit is drained by using a finished drainage ditch. Due to the arrangement, large-area roof rainwater is treated by the roof rainwater collecting unit, the amount of rainwater on the road surface is small, and the water quality pollution caused by the rainwater on the road surface is serious; through the setting of road surface rainwater collecting unit, separately collect roofing rainwater and road rainwater, improve the comprehensive utilization ratio to the rainwater, owing to roof rainwater and road surface rainwater separation moreover to guaranteed that the facility of carrying the road surface rainwater can change finished product escape canal drainage from the pipeline into, reduced drainage pipe's buried depth equally, reduce the engineering investment.
In one embodiment of the present invention, the ecological purification unit includes a rainwater garden to which rainwater collected at the drainage ditch is drained, and a reservoir provided in the rainwater garden.
So set up, because the volume of road surface rainwater is less, consequently can adopt the finished product escape canal to carry out the drainage and then can reduce the terminal elevation of drainage, the degree of depth in rainwater garden can become shallow, easily the view harmony.
In one embodiment of the invention, the system is applied to locations with less than 15% greenfield rate.
By the arrangement, the system is applied to the places with the greenbelt rate lower than 15%, so that the rainwater utilization rate of the places can be improved, the biological diversity of the places can be improved, and the ecological environment of the places can be improved.
Drawings
Fig. 1 is a schematic view of an embodiment of the rainwater ecological purification, collection and utilization system suitable for low greenbelt coverage.
Fig. 2 is a schematic sectional view of an ecological rainwater purification and collection and utilization system suitable for low greenery efficiency according to the embodiment of fig. 1.
Reference numerals: 11. collecting a vertical pipe; 12. a pressure discharge pipe; 13. an energy storage pressure tee; 14. an access hole; 15. a flow abandoning device; 16. a flow discharge pipe; 21. a rain garden; 22. a reservoir; 23. and (7) a drainage ditch.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.
It is to be understood that in the description of the present invention, the orientation or positional relationship indicated by the terms of orientation such as "front, back, up, down, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these terms do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 to fig. 2, a rainwater ecological purification, collection and utilization system suitable for low greenery patches according to a preferred embodiment of the present invention is shown in fig. 1, which is a schematic perspective plan view of the rainwater ecological purification, collection and utilization system suitable for low greenery patches, and fig. 2 is a sectional view of the rainwater ecological purification, collection and utilization system suitable for low greenery patches shown in fig. 1.
At present, a roof rainwater collecting and recycling system is provided in the existing scheme, and the system consists of a building rainwater pipe, a drainage side ditch, a flow abandoning well, a penetration well, a concave greenbelt, a grass planting shallow trench, a landscape water body, a water suction pump, a water distribution pipe and a ground hydrant, so that rainwater is effectively collected and utilized, water resources are saved, and certain greening is provided. However, the system has the disadvantages of complex structure, high comprehensive cost and difficult practical popularization and application.
Aiming at the technical problem, the invention provides a rainwater ecological purification and collection utilization system suitable for low greenbelt rate, wherein the total greenbelt rate of a city is the proportion of the total area of each greening land in a built-up area of the city to the total area of the built-up area of the city, and the greenbelt rate of a certain area in the built-up area can also be calculated; if the residential area green space ratio is the ratio of the sum of various green spaces in the residential area land range to the residential area land; the low greenfield ratio means that the sum of the greenfield areas is 15% or less of the total area of the built-up area. It can be understood that the application scene of the rainwater ecological purification and collection utilization system suitable for the low greenery patches provided by the invention can be cities, business districts, residential quarters and the like with low greenery patches. The system is connected with the pressure discharge pipe 12 in a closed mode through the collection vertical pipe 11, so that roof rainwater collected by the collection vertical pipe 11 has certain potential energy, namely the potential energy of rainwater on the inlet side of the energy storage pressure tee joint 13 is larger than that on the outlet side of the energy storage pressure tee joint 13, the reduction of the buried depth of the tail end of the pressure discharge pipe 12 is achieved, the buried depth cost of the pressure discharge pipe 12 is saved, and meanwhile the system has the advantages of being simple in structure, high in reliability and easy to popularize.
As shown in fig. 1, the rainwater ecological purification, collection and utilization system suitable for low greenbelt rate provided by the invention comprises a roof rainwater collection unit, an ecological purification unit and a road rainwater collection unit. The roof rainwater collecting unit is used for collecting roof rainwater, the ecological purifying unit is used for purifying road surface rainwater, and the road surface rainwater collecting unit is used for collecting road surface rainwater. The roof rainwater collecting unit comprises a collecting vertical pipe 11, a pressure discharge pipe 12 and an energy storage pressure tee joint 13, the collecting vertical pipe 11 is communicated with the pressure discharge pipe 12, the pressure discharge pipe 12 is horizontally laid, and the collecting vertical pipe 11 is vertically laid and is hermetically connected with the pressure discharge pipe 12, so that the roof rainwater potential energy on the inlet side of the energy storage pressure tee joint 13 is higher than the roof rainwater potential energy on the outlet side of the energy storage pressure tee joint 13. It is worth mentioning that since the outlet of the collecting riser 11 is not directly connected to the atmosphere, it is connected to the inlet of the pressure discharge pipe 12; compared with a roof rainwater conveying pipeline directly communicated with the atmosphere in the prior art, the rainwater ecological purification, collection and utilization system suitable for the low greenbelt rate can further utilize the potential energy of rainwater discharged from a roof to the outdoor ground of a building, the burial depth of the pressure discharge pipe 12 is reduced, and the construction cost of the roof rainwater collection and utilization system provided by the invention is reduced.
The ecological purification unit is connected to the roof rainwater collection unit, and the energy storage pressure tee 13 is arranged between the collection vertical pipe 11 and the ecological purification unit. The ecological purification unit comprises a rainwater garden 21 and a water storage pool 22 arranged in the rainwater garden 21, part of roof rainwater collected by the roof rainwater collection unit is discharged into the rainwater garden 21, and the rest of roof rainwater is discharged into the water storage pool 22; by arranging the rainwater garden 21, part of rainwater which is collected and abandoned by roof rainwater can be directly discharged into the rainwater garden 21, so that the ecological purification of the rainwater can be realized; by arranging the water storage tank 22, collected roof rainwater can be discharged into the water storage tank 22, and the rainwater can be stored, so that different parts of rainwater can be separately treated, and the rainwater utilization effect is improved; the rainwater garden 21 and the water storage pool 22 simultaneously improve the utilization rate of urban water resources and increase the biological diversity.
Specifically, the input port of the collecting vertical pipe 11 is communicated with a rainwater confluence part and/or a drainage groove of a roof of the building, the output port is communicated with the energy storage pressure tee 13, and the collecting vertical pipe 11 is fixed on a building body of the building through the vertical pipe (for example, fixed through a vertical pipe clamping frame), or fixed on an external wall of the building, or can be arranged in parallel with a water supply and drainage pipeline of the building. Preferably, the collection riser 11 is perpendicular to the outdoor ground through a riser clamp. It will be appreciated that the manner of attachment between collection riser 11 and the building is not limited, as long as roof rainwater can flow through collection riser 11 to pressure drain 12.
It is worth mentioning that, in the present invention, the diameter of the collecting vertical pipe 11 can be selected according to the rainfall of the natural environment of the building, and the number of the collecting vertical pipes 11 can be set according to the roofing area of the building and the number of the buildings. Preferably, a plurality of collecting vertical pipes 11 can be arranged in the same building, so that rainwater on the roof can flow to the pressure discharge pipe 12 through the plurality of collecting vertical pipes 11 in time when rainstorm occurs, and the problem of water accumulation on the roof is avoided; on the other hand, the collecting vertical pipes 11 can be respectively arranged in a plurality of buildings, and the collecting vertical pipes 11 are arranged in parallel and are all communicated with the pressure discharge pipe 12, so that the number of the energy storage pressure tee joints 13 and the laying length of the pressure discharge pipe 12 are reduced, and the material use cost and the investment cost of the system are reduced.
As shown in fig. 2, the roof rainwater collecting unit is further provided with a manhole 14 for overhauling the energy storage pressure tee 13, and in non-rainy days, the problem that the energy storage pressure tee 13 is blocked or fails is solved by opening the manhole 14 to clear and overhaul the energy storage pressure tee 13 regularly, so that the reliability of the energy storage pressure tee 13 is improved. Specifically, the manhole 14 is arranged near the energy storage pressure tee 13, and may also be connected to the energy storage pressure tee 13 through a pipeline. The access hole 14 is arranged on the outdoor ground of the building for manual maintenance; it can be understood that the arrangement of the access hole 14 only needs to be convenient for overhauling the energy storage pressure tee 13, and the roof rainwater collection and utilization system is kept closed and is not communicated with the atmosphere;
specifically, the energy storage pressure tee 13 is arranged between the collecting vertical pipe 11 and the pressure discharge pipe 12, an inlet of the energy storage pressure tee 13 is communicated with an outlet of the collecting vertical pipe 11, and an outlet of the energy storage pressure tee 13 is connected with an inlet of the pressure discharge pipe 12; it is worth mentioning that, because the roof rainwater potential energy of the inlet side of the energy storage pressure tee joint 13 is higher than the roof rainwater potential energy on the outlet side of the energy storage pressure tee joint 13, the collected roof rainwater has certain pressure under the blocking effect of the energy storage pressure tee joint 13, so that the pipe diameter and the buried depth of the pipe of the pressure discharge pipe 12 can be reduced, the manufacturing cost of the roof rainwater collecting and utilizing system is reduced, and the roof rainwater collecting and utilizing system is easy to popularize and apply due to the simple structure and high reliability. In addition, because the burial depth of the pressure discharge pipe 12 is reduced, the elevation of the pressure discharge pipe 12 is improved, rainwater gravity flow discharge in regions with high river levels can be realized, the drainage safety is further guaranteed, and the urban ponding risk is reduced. Preferably, the pressure tee joint is selected as the energy storage pressure tee joint 13, and the arrangement of the pressure tee joint enables the roof rainwater collecting unit to realize the energy storage function and to be provided with the access hole 14, so that the structure of the roof rainwater collecting unit is simplified, and the cost is reduced.
As shown in fig. 1, the roof rainwater collecting unit further comprises a drainage device 15; the roof rainwater flows into the drainage device 15 through the outlet of the energy storage pressure tee 13, the roof rainwater collected by the roof rainwater collecting unit is divided into early-stage rainwater and middle-later-stage rainwater, when the roof rainwater can flow into the drainage device 15, the part of rainwater is the early-stage rainwater, and the early-stage rainwater is discharged to the rainwater garden 21 through the drainage device 15; the rest part of roof rainwater is middle and later stage rainwater, and the middle and later stage rainwater is discharged into the reservoir 22.
Specifically, it is preferable to adopt a water quantity control type flow discarding device 15, wherein the flow discarding device 15 has a water outlet and a flow discarding port, the water outlet is directly communicated with the water reservoir 22, the flow discarding port is communicated with the input port of the flow discarding pipe 16, the output port of the flow discarding pipe 16 is connected with the rainwater garden 21, it is easy to understand that the length and the number of the flow discarding pipe 16 are determined by the area of the rainwater garden 21; the inlet of the flow abandoning device 15 is communicated with a pressure discharge pipe 12 communicated with the outlet of the energy storage pressure tee joint 13, the early-stage rainwater abandoned by the flow abandoning device 15 enters a rainwater garden 21 through a flow abandoning port and a flow abandoning pipe 16, and the middle-later-stage rainwater abandoned by the flow abandoning device 15 is discharged into a water reservoir 22 through a water outlet; in rainy days, the early-stage rainwater flow is small, the pollution is serious, the early-stage rainwater is discarded by arranging the discarding device 15, the former-stage rainwater discarded is discharged into the rainwater garden 21, the rest rainwater is discharged into the water storage tank 22 for storage, and the secondary utilization is waited, so that the separation of the former-stage rainwater seriously polluted and the cleaner middle and later-stage rainwater is realized, the comprehensive utilization rate of the roof rainwater is improved, and the water resource is saved.
In addition, in other embodiments, the reservoir 22 is provided with an overflow port, which is communicated with the river; specifically, the overflow mouth sets up in the upper end of overflow pond, and when meetting the great weather of rainfall, the position that the storage horizon line of cistern 22 exceeded the overflow mouth has solved the problem of spilling over when rainwater surpassed the biggest memory space of cistern 22 in the cistern 22, avoids cistern 22 to cause the waterlogging, promotes cistern 22 friendly to ecological environment.
The road surface rainwater collection unit is used for collecting road surface rainwater, and the road surface rainwater collection unit includes escape canal 23, and escape canal 23 communicates in ecological purification unit. Specifically, the drainage ditch 23 is arranged on the road surface, so that rainwater on the road surface can flow into the drainage ditch 23; preferably, the drainage ditch 23 is a finished drainage ditch 23; because large-area roof rainwater is treated by the roof rainwater collecting unit, the amount of rainwater on the road surface is small, and the water quality pollution of the roof rainwater is light, the roof rainwater can be used for flushing toilets, washing vehicles, greening irrigation or washing roads after simple treatment, and the water quality pollution of the roof rainwater is serious; through the setting of road surface rainwater collection unit, separately collect roofing rainwater and road rainwater, improve the comprehensive utilization ratio to the rainwater.
In addition, the rainwater collected by the drainage ditch 23 is drained into the rainwater garden 21, and since large-area roof rainwater is collected by the roof rainwater collection unit and the amount of rainwater on the road surface is small, the finished drainage ditch 23 can be adopted for drainage, the elevation of the tail end of the drainage can be reduced, the depth of the rainwater garden 21 can be shallow, harmony of landscape is facilitated, and the rainwater garden 21 has certain purification capacity, so that the collected rainwater on the road surface can be purified.
In the urban construction process, the problems that the greenbelt rate of some public buildings is low, rainwater runoff is difficult to control effectively, non-point source pollution is reduced and the like can be encountered. The rainwater on the roof in the city has good water quality, can be utilized after simple treatment, and under the carbon neutralization concept, the invention realizes excellent water and excellent use, reasonably utilizes water resources, increases the biological diversity of green lands in the city, and also solves the rainwater ecological treatment problem of commercial lands and public buildings with low green land rate.
The application principle of the rainwater ecological purification, collection and utilization system suitable for low greenbelt rate is as follows: firstly, part of rainwater in the city can be collected by the roof rainwater collecting unit, the roof water collecting tank collects rainwater to enter the collecting vertical pipe 11, then the collecting vertical pipe 11 guides the roof rainwater into the pressure discharge pipe 12, and the rainwater flows into the energy storage pressure tee 13. The outlet of the collecting vertical pipe 11 is connected with the pressure discharge pipe 12 in a sealing way and is not connected with the atmosphere, so that the potential energy of the roof rainwater can be utilized to push the rainwater in the horizontally laid pressure discharge pipe 12, so that the discharged rainwater has pressure, and the rainwater with pressure can flow to the drainage device 15 at this time, then flows through the drainage of the drainage device 15, and discharges the roof rainwater with heavy early pollution to the rainwater garden 21 of the ecological purification unit through the drainage pipe 16 for purification. The mid-late stage roof rainwater is then discharged to the reservoir 22 of the ecological purification unit for storage. The rain from the reservoir 22 can be used in the daily application of irrigation for greening, road washing, car washing, etc. in cities.
Secondly, the rainwater on the road surface in the city is collected by the drainage ditch 23, and the rainwater collected by the drainage ditch 23 is drained into the rainwater garden 21 for purification because the rainwater on the road surface is seriously polluted.
All possible combinations of the technical features of the above-described embodiments are not described for the sake of brevity, but should be considered as within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. An ecological rainwater purification and collection utilization system suitable for low greenery patches, comprising:
the roof rainwater collecting unit is used for collecting roof rainwater; the roof rainwater collecting unit comprises a collecting vertical pipe (11), a pressure discharge pipe (12) and an energy storage pressure tee joint (13), wherein the collecting vertical pipe (11) is communicated with the pressure discharge pipe (12), the pressure discharge pipe (12) is horizontally laid, the collecting vertical pipe (11) is vertically laid, the energy storage pressure tee joint (13) is arranged between the collecting vertical pipe (11) and the pressure discharge pipe (12), the energy storage pressure tee joint (13) is a pressure tee joint pipe, an outlet of the collecting vertical pipe (11) is hermetically connected with the pressure discharge pipe (12) and is not connected with the atmosphere, the potential energy of rainwater on the inlet side of the energy storage pressure tee joint (13) is larger than that on the outlet side of the energy storage pressure tee joint (13), so that the potential energy of the roof rainwater can be utilized to push the rainwater in the horizontally laid pressure discharge pipe (12) to enable the discharged rainwater to have pressure; and
the roof rainwater collecting unit is connected to the ecological purification unit, and the energy storage pressure tee joint (13) is arranged between the collecting vertical pipe (11) and the ecological purification unit; and
the road surface rainwater collecting unit comprises a drainage ditch (23), and the drainage ditch (23) is communicated with the ecological purification unit;
the rainwater ecological purification, collection and utilization system suitable for the low greenbelt rate is applied to places with the greenbelt rate of less than or equal to 15%.
2. A rainwater ecological purification and collection utilization system suitable for low greenery rates according to claim 1, characterized in that the ecological purification unit comprises a rainwater garden (21) and a reservoir (22) arranged in the rainwater garden (21), part of the roof rainwater collected by the roof rainwater collection unit is discharged into the rainwater garden (21), and the rest of the roof rainwater is discharged into the reservoir (22).
3. A rainwater ecological purification and collection utilization system suitable for low greenery efficiency according to claim 2, characterized in that said roof rainwater collection unit further comprises a flow abandoning device (15), the inlet of said flow abandoning device (15) is communicated with said pressure discharge pipe (12), the roof rainwater collected by said roof rainwater collection unit is divided into early stage rainwater and middle and later stage rainwater, when the roof rainwater can flow into said flow abandoning device (15), the part of the rainwater is early stage rainwater, and said early stage rainwater is discharged to said rainwater garden (21) through said flow abandoning device (15); the rest part of roof rainwater is middle and later stage rainwater, and the middle and later stage rainwater is discharged into the reservoir (22).
4. The ecological purification, collection and utilization system for rainwater suitable for low greenbelt rate of claim 1, characterized in that the roof rainwater collection unit is further provided with a manhole (14), the manhole (14) is communicated with the energy storage pressure tee joint (13), and the arrangement of the manhole (14) has an energy storage function in the same way.
5. The ecological purification and collection and utilization system for rainwater suitable for low greenery patches of claim 2, characterized in that the reservoir (22) is provided with an overflow port, and the overflow port is communicated with a river channel.
6. A rainwater ecological purification and collection utilization system suitable for low greenery efficiency according to claim 1, characterized in that said rainwater collection unit comprises a plurality of said collection stand pipes (11), a plurality of said collection stand pipes (11) are arranged in parallel and all communicated with said pressure discharge pipe (12).
7. The ecological purification and collection and utilization system for low greenery patches of rainwater according to claim 1, wherein said road surface rainwater collection unit is drained by a finished drain.
8. A rainwater ecological purification and collection utilization system suitable for low greenery rates according to claim 1, characterized in that the ecological purification unit comprises a rainwater garden (21) and a water reservoir (22) provided in the rainwater garden (21), and rainwater collected by the drainage ditch (23) is drained to the rainwater garden (21).
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| CN201317952Y (en) * | 2008-12-17 | 2009-09-30 | 中国市政工程西北设计研究院有限公司 | Rainwater collecting and utilizing system for city and town residential districts |
| CN103967105A (en) * | 2014-04-25 | 2014-08-06 | 天津大学 | Housing cluster rainwater ecological drain-off system |
| CN105839755A (en) * | 2016-03-30 | 2016-08-10 | 江苏大学 | Roof rainwater collecting system |
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| AU2007200913A1 (en) * | 2006-04-03 | 2007-10-18 | Jeffrey George Brown | Method, apparatus and system for determining water requirements for one or more home units |
| CN201317952Y (en) * | 2008-12-17 | 2009-09-30 | 中国市政工程西北设计研究院有限公司 | Rainwater collecting and utilizing system for city and town residential districts |
| CN103967105A (en) * | 2014-04-25 | 2014-08-06 | 天津大学 | Housing cluster rainwater ecological drain-off system |
| CN105839755A (en) * | 2016-03-30 | 2016-08-10 | 江苏大学 | Roof rainwater collecting system |
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