CN107763271A - Itself a kind of new skimming formula current limliting permanent flow valve - Google Patents
Itself a kind of new skimming formula current limliting permanent flow valve Download PDFInfo
- Publication number
- CN107763271A CN107763271A CN201610701613.7A CN201610701613A CN107763271A CN 107763271 A CN107763271 A CN 107763271A CN 201610701613 A CN201610701613 A CN 201610701613A CN 107763271 A CN107763271 A CN 107763271A
- Authority
- CN
- China
- Prior art keywords
- restriction orifice
- bellows
- floating drum
- current limliting
- inlet opening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F7/00—Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
- E03F7/02—Shut-off devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/18—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Check Valves (AREA)
- Sewage (AREA)
Abstract
The invention discloses itself a kind of new skimming formula current limliting permanent flow valve, it is connected with drainpipe, including valve body and valve seat, also include bellows, restriction orifice, floating drum and ventilation duct, floating drum opens up the top being fixed in valve body, restriction orifice is secured by bolts in below floating drum, distance can pass through nut locking distance between restriction orifice and floating drum, one end of ventilation duct penetrates spacing discharge orifice plate, the other end passes through floating drum, restriction orifice is provided with the inlet opening of insertion restriction orifice upper and lower surface, the opening of inlet opening is always positioned under liquid level, bellows is below restriction orifice and its one end is interconnected with inlet opening, bellows has the function of freely being stretched with buoy lifting and flexible height is consistent with liquid level adjustable height, the other end of bellows is fixed on drainpipe by valve seat.The invention provides a kind of instead of traditional downflow weir, effectively solve urban flooding, improve itself new skimming formula current limliting permanent flow valve of the sewage treatment capacity of sewage treatment plant.
Description
Technical field
The present invention relates to flow regulating valve gate technique field, and in particular to it is a kind of it is new can itself skimming and can flow outlet
Measure constant valve.
Background technology
Even many cities including developed country in all parts of the country in recent years all can flood often, flood is not only
Lives and properties to common people are subject to huge destruction, and cause very big economic loss to country.When heavy rain occurs,
The runoff rainwater on land, roof rain water etc. all conflux in the interim storing facilities of water such as lake, pond, pond, these storing facilities of waters
All it is the outside draining by the way of downflow weir after being filled by rainwater, once these overflow waters are all simultaneously to receiving water body and city
When drainage system discharges, receiving water body and sewerage system have little time to discharge, a large amount of rainwater in overload state at last
Pour in down a chimney city, then cause urban waterlogging phenomenon.
In addition, when heavy rain occurs, substantial amounts of runoff rainwater flows to urban sewage pipeline by catch-basin and sewage intercepting chamber,
Into sewage treatment plant, sewage treatment plant is in serious overload operation state, substantially reduce sewage treatment capacity, it is poisonous to have
Evil material discharge receiving water body, causes serious environmental pollution.During " 13 ", the construction that China has started sponge city is high
Tide.One important measure in sponge city is how to manage rainwater and utilizes rainwater.Therefore, how these storages effectively to be adjusted
Wetting system, handle and discharge rainwater with being effective be particularly important.
The content of the invention
It is a kind of instead of traditional downflow weir present invention aims at providing based on above mentioned problem, effectively solve urban flooding,
Improve itself new skimming formula current limliting permanent flow valve of the sewage treatment capacity of sewage treatment plant.
For problem above, there is provided following technical scheme：
Itself a kind of new skimming formula current limliting permanent flow valve, is connected with drainpipe, including valve body and valve seat, its feature exist
In：Also include bellows, restriction orifice, floating drum and ventilation duct, the floating drum opens up the top being fixed in valve body, the current limliting
Orifice plate is fixed on below floating drum by passing vertically through the bolt of floating drum, and distance is adjustable between the restriction orifice and floating drum and can lead to
The nut locking distance crossed on bolt, one end of the ventilation duct penetrate spacing discharge orifice plate, and the other end extends up through floating drum,
The restriction orifice is provided with the inlet opening of insertion restriction orifice upper and lower surface, and the opening of the inlet opening is in valve body self gravitation
It is always positioned under effect under liquid level, the bellows is below restriction orifice and its one end is interconnected with inlet opening, institute
State bellows to be consistent with liquid level adjustable height with the function of freely stretching with buoy lifting and flexible height, the ripple
The other end of line pipe is fixed on drainpipe by valve seat.
The present invention is further arranged to：The valve seat is in the tubular of opening upwards and is placed on one end of bellows, described to open
The lower end of mouth and valve body can be mutually adapted close contact under hydraulic action, and bottom on the inside of valve seat is fixed in one end of the bellows
Portion is simultaneously connected with the drainpipe in outside.
The present invention is further arranged to：The side wall of the valve seat is provided with some through holes so that valve seat and valve body are in close contact
Liquid is entered by through hole in the inlet opening of restriction orifice afterwards.
The present invention is further arranged to：The inlet opening, which upwardly extends, to be raised in restriction orifice and is in tower sharp structure, tower
Sharp lateral parts are provided with the indentation of different inlet opening bores, and each indentation represents different inlet opening bores, the restriction orifice
Bottom be short circuit for the tubular shape of bellows connection.
The present invention is further arranged to：The short circuit of the bellows and restriction orifice bottom is interfixed company by clip
Connect.
The present invention is further arranged to：The bellows is fixed on the inside bottom of valve seat by screw.
Beneficial effects of the present invention：
1, the present invention can be arranged on the interim storage (dirt) pond (well) such as lake, pond, pond, catch-basin, sewage intercepting chamber
Interior, valve body is sunk in water (or other liquid) in the self gravitation effect lower part of floating drum, and the inlet opening of restriction orifice is all the time
A fixed liquid level difference is there is under liquid level, between restriction orifice and liquid level, the liquid level difference is the work of permanent flow valve
Make head.Water (or other liquid) enters drainpipe by the aperture of restriction orifice by bellows, when interim water storage (sewage) pond
(simultaneously) when the liquid level in raises, bellows stretches upwards under the buoyancy of floating drum, stretching, extension height and liquid level wicking height one
Cause so that liquid level difference immobilizes, while ensures that valve body is sunk under part in water (or other liquid) all the time；When interim water storage
When liquid level in (sewage) pond (well) reduces, bellows itself convergent force and valve body, floating drum and restriction orifice etc. itself
Retracted downward under Action of Gravity Field, it is consistent with liquid level falling head to shrink height so that liquid level difference immobilizes, it is ensured that valve body is all the time
It is to be sunk under part in water (or other liquid).According to orifice outflow flow formula：Q=CA (2gH) ^0.5, due to working head
H is constant, and C is discharge coefficient, is constant, and g is acceleration of gravity, and individual constant, the constant i.e. aperture in aperture of restriction orifice
Sectional area A is constant, thus into drainpipe flow Q with regard to constant.Due to the water inlet of restriction orifice be always positioned at liquid level it
Under, so, the floating object in water storage (sewage) pond (well) never enters aperture, plays a part of itself skimming.
2, the present invention is raised with the rise of liquid level by floating drum, reduces and reduce, and makes working head constant all the time, really
It is invariable to protect rate of discharge, either fine day still rains or heavy rain, the discharge capacity in water storage (sewage) pond (well) consistently achieve
Maximum emission is designed, on the one hand can mitigate the discharge load of sewerage system significantly, also make sewage treatment plant's non-overloading
Operation, the volume in water storage (sewage) pond (well) on the other hand can be reduced, then expand land usable floor area, to preventing that city is big vast
Flood and raising sewage treatment plant dirty removal capacities play conclusive effect, so as to reach the purpose of environmental protection.
3, present invention modern design, clear principle, easy to use, both no any movable part or not any rapid wear
Part, without power consumption, there is very high technical indicator, it is reliability and durability, itself new skimming formula current limliting permanent flow valve is widely used,
Both urban flooding can be prevented, city land usable floor area can be expanded again.
Brief description of the drawings
Fig. 1 is the structural representation of itself new skimming formula current limliting permanent flow valve in the embodiment of the present invention；
Fig. 2 is cross-section structure when itself new skimming formula current limliting permanent flow valve is installed in catch-basin in the embodiment of the present invention
Schematic diagram；
Fig. 3 is the section knot that itself new skimming formula current limliting permanent flow valve is installed in sewage intercepting chamber in the embodiment of the present invention
Structure schematic diagram；
Fig. 4 is the structural representation of restriction orifice in the embodiment of the present invention.
Illustrate in figure：1- valve bodies；2- valve seats；21- through holes；22- screws；3- bellowss；4- restriction orifices；41- inlet openings；
42- clips；43- indentations；44- short circuits；5- floating drums；6- bolts；7- nuts；8- ventilation ducts；9- drainpipes；
Embodiment
With reference to the accompanying drawings and examples, the embodiment of the present invention is described in further detail.Implement below
Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
As shown in Figures 1 and 2, itself a kind of new skimming formula current limliting permanent flow valve, is connected with drainpipe 9, including valve
Body 1 and valve seat 2, in addition to bellows 3, restriction orifice 4, floating drum 5 and ventilation duct 8, the floating drum 5, which opens up, to be fixed in valve body 1
Top, the restriction orifice 4 is fixed on the lower section of floating drum 5 by passing vertically through the bolt 6 of floating drum 5, the restriction orifice 4 with it is floating
Distance is adjustable between cylinder 5 and distance can be locked by the nut 7 on bolt 6, and one end of the ventilation duct 8 penetrates spacing discharge orifice plate
4, the other end extends up through floating drum 5；The restriction orifice 4 is provided with the inlet opening 41 of the insertion upper and lower surface of restriction orifice 4,
The opening of the inlet opening 41 is always positioned under liquid level under the self gravitation effect of valve body 1, and the bellows 3 is located at metering hole
The lower section of plate 4 and its one end and inlet opening 41 are interconnected, and the bellows 3 has the function of lifting and freely stretch with floating drum 5
And flexible height is consistent with liquid level adjustable height, the other end of the bellows 3 is fixed on drainpipe 9 by valve seat 2.
As shown in Fig. 2 itself new skimming formula current limliting permanent flow valve can be arranged on lake, pond, pond, catch-basin,
Sewage intercepting chamber etc. is stored in (dirt) pond (well) temporarily, and valve body 1 is in valve body 1, floating drum 5, restriction orifice 4 and other assembling accessories
All the time part sinks in water (or other liquid) under self gravitation effect；The inlet opening 41 of restriction orifice 4 is always positioned at liquid level
Under, ensure a fixed liquid level difference H be present between restriction orifice 4 and liquid level, liquid level difference H is the working water of permanent flow valve
Head.
As shown in Fig. 2 the water (or other liquid) is as described in entering the process bellows 3 of inlet opening 41 of restriction orifice 4
Drainpipe 9, when in interim water storage (sewage) pond (well) liquid level rise when, bellows 3 floating drum 5 (under buoyancy upwards
Stretching, extension, stretching, extension height are consistent with liquid level wicking height so that liquid level difference H immobilizes, while ensures that valve body 1 is under part all the time
Sink in water (or other liquid)；When the liquid level in interim water storage (sewage) pond (well) reduces, contraction of the bellows 3 at itself
Retracted downward under the self gravitation effect of power and valve body 1, floating drum 5 and restriction orifice 4 etc., contracted length and liquid level falling head one
Cause so that liquid level difference H is immobilized, it is ensured that valve body 1 is sunk under part in water (or other liquid) all the time.
As shown in figure 3, the valve seat 2 is in the tubular of opening upwards and is placed on one end of bellows 3, the opening and valve body
1 lower end can be mutually adapted close contact under hydraulic action, and the inside bottom of valve seat 2 is fixed on simultaneously in one end of the bellows 3
It is connected with the drainpipe 9 in outside.The side wall of the valve seat 2 is provided with some through holes 21 so that valve seat 2 and valve body 1 are in close contact
Liquid is entered by through hole 21 in the inlet opening 41 of restriction orifice 4 afterwards.When severe drought, in interim water storage (sewage) pond (well)
Liquid level reduces in advance, causes valve body 1 to be in close contact with valve seat 2, and water (or other liquid) then enters metering hole by the through hole 21
The inlet opening 41 of plate 4, then enter drainpipe 9 via bellows 3.
As shown in figure 4, the inlet opening 41 on the restriction orifice 4 upwardly extends and is raised in restriction orifice 4 and is in pinnacle of a pagoda shape
Structure, pinnacle of a pagoda lateral parts are provided with the indentation 43 of different inlet opening bores, and each indentation 43 represents different inlet opening bores, with
Just according to demand, the inlet opening aperture of needs can be obtained along some score cuts, the bottom of the restriction orifice 4 is to supply
The short circuit 44 of the tubular shape of the connection of bellows 3.Further, the bellows 3 and the short circuit 44 of the bottom of restriction orifice 4 pass through card
Hoop 42 is mutually permanently connected；The bellows 3 is fixed on the inside bottom of valve seat 2 by screw 22.
As follows to advantages of the present invention citing supplementary notes with reference to Fig. 1, Fig. 2 and Fig. 3, the direction of arrow is rainwater in figure
Or the flow direction of sewage：
Checked according to documents and materials：Storm sewer and combined pipeline flowing full flow velocity are 0.75m/s
If 0.25 sq-km region (500m*500m), there is 70% rainfall runoff into a pond, rainfall
Rainfall is 100mm, lasts 6 hours.
(1) calculating of rainfall：
500m*500m*0.1m=25000m3
Rainfall runoff to the amount in pond be 25000*70%=17500m3
(2) determination of pool size
If pond is shaped as circular, depth h=10m, then pond diameter D=47m.
(3) if itself new skimming formula current limliting permanent flow valve is installed in pond 5m depths, that is to say, that either fine day
Or rain, pond all maintains the deep water capacities of 5m, it is assumed that the caliber of the urban discharging pipeline on the ground is DN600, then constant current
The bore of valve is also DN600, then the amount of rainfall that the heavy rain for lasting 6 hours is discharged is：
0.6*0.6*0.785*0.75*3600*6=4578m3
Now, the water level in pond is：Overflow does not occur for (17500-4578)/472*0.785=7.5m ＜ 10m, pond,
Permanent flow valve continues to discharge the rainwater capacity of pond 2.5m depth, it is necessary to which the time is after heavy rain：472*0.785*2.5/0.6*
0.6*0.785*0.75*3600=5.7 hours.
Calculating process more than can be drawn the following conclusions：
1st, 100mm rainfall, it is always maximum rainfall for the ground, itself new skimming formula current limliting is installed
Both do not increase load to sewerage system after permanent flow valve, also do not have to make pond overflow；
2nd, 100mm rainfall, the water capacity for having 2.5m deep all the time for the pond leaves unused, so can essentially
The diameter in pond is reduced to D=41 rice, thus expands land usable floor area (6m*6m=36m2), create very big warp
Ji benefit.
3rd, itself new skimming formula current limliting permanent flow valve has itself skimming function, so will not be made to sewerage system
Into clogging, make municipal drainage smooth, avoid flood.
Itself new skimming formula current limliting permanent flow valve provided by the invention has advantage as is evident below：
Modern design, clear principle, easy to use, both no any movable part or not any consumable accessory, without electricity
Consumption, has very high technical indicator, reliability and durability, widely uses itself new skimming formula current limliting permanent flow valve, can both prevent
Urban flooding, city land usable floor area can be expanded again.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, some improvement and modification can also be made, above-mentioned hypothesis these
Improvement and modification also should be regarded as protection scope of the present invention.
Claims (6)
1. itself a kind of new skimming formula current limliting permanent flow valve, is connected with drainpipe, including valve body and valve seat, its feature exist
In：Also include bellows, restriction orifice, floating drum and ventilation duct, the floating drum opens up the top being fixed in valve body, the current limliting
Orifice plate is fixed on below floating drum by passing vertically through the bolt of floating drum, and distance is adjustable between the restriction orifice and floating drum and can lead to
The nut locking distance crossed on bolt, one end of the ventilation duct penetrate spacing discharge orifice plate, and the other end extends up through floating drum,
The restriction orifice is provided with the inlet opening of insertion restriction orifice upper and lower surface, and the opening of the inlet opening is in valve body self gravitation
It is always positioned under effect under liquid level, the bellows is below restriction orifice and its one end is interconnected with inlet opening, institute
State bellows to be consistent with liquid level adjustable height with the function of freely stretching with buoy lifting and flexible height, the ripple
The other end of line pipe is fixed on drainpipe by valve seat.
2. itself new skimming formula current limliting permanent flow valve of one kind according to claim 1, it is characterised in that：The valve seat is in open
The upward tubular of mouth is simultaneously placed on one end of bellows, and the opening and the lower end of valve body can be mutually adapted closely under hydraulic action
Contact, one end of the bellows is fixed on valve seat inside bottom and is connected with the drainpipe in outside.
3. itself new skimming formula current limliting permanent flow valve of one kind according to claim 2, it is characterised in that：The side of the valve seat
Wall is provided with liquid after some through holes are in close contact so as to valve seat with valve body and entered by through hole in the inlet opening of restriction orifice.
4. according to a kind of any itself the described new skimming formula current limliting permanent flow valve of claim 1-3, it is characterised in that：It is described enter
Water hole, which upwardly extends, to be raised in restriction orifice and is in tower sharp structure, and pinnacle of a pagoda lateral parts are provided with the quarter of different inlet opening bores
Trace, each indentation represent different inlet opening bores, and the bottom of the restriction orifice is the tubular shape for bellows connection
Short circuit.
5. itself new skimming formula current limliting permanent flow valve of one kind according to claim 4, it is characterised in that：The bellows with
The short circuit of restriction orifice bottom is mutually permanently connected by clip.
6. itself new skimming formula current limliting permanent flow valve of one kind according to claim 2, it is characterised in that：The bellows leads to
Cross the inside bottom that screw is fixed on valve seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610701613.7A CN107763271B (en) | 2016-08-15 | 2016-08-15 | Itself a kind of novel skimming formula current limliting permanent flow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610701613.7A CN107763271B (en) | 2016-08-15 | 2016-08-15 | Itself a kind of novel skimming formula current limliting permanent flow valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107763271A true CN107763271A (en) | 2018-03-06 |
| CN107763271B CN107763271B (en) | 2019-06-14 |
Family
ID=61263950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610701613.7A Active CN107763271B (en) | 2016-08-15 | 2016-08-15 | Itself a kind of novel skimming formula current limliting permanent flow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107763271B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2657488A1 (en) * | 1976-12-18 | 1978-06-22 | Schulze Oswald Kg | Water extraction equipment for reservoir - has overflow pipe supported by float and guided on stand-pipe |
| DE3601094A1 (en) * | 1986-01-16 | 1987-07-23 | Willi Dipl Ing Hoerdemann | Device for drawing off a constant water quantity from a basin |
| GB2312177A (en) * | 1996-04-17 | 1997-10-22 | Frembgen Fritz Herbert | Device for removing the surface layer of liquids |
| DE19804160A1 (en) * | 1998-02-03 | 1999-09-09 | Fresenius Chemische Und Biolog | Automatic thrust drainage appliance for clean and contaminated fluids, preferably for the sewage industry |
| DE102008049693A1 (en) * | 2008-09-19 | 2010-04-01 | Technische Universität Dresden | Adjustable water extraction device for dams and lakes, has water reservoir in pipe with height-adjustable water inlet and water outlet side |
| CN104074262A (en) * | 2014-07-11 | 2014-10-01 | 北京建筑大学 | Intelligent dirt intercepting device for rainwater inspection shaft |
-
2016
- 2016-08-15 CN CN201610701613.7A patent/CN107763271B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2657488A1 (en) * | 1976-12-18 | 1978-06-22 | Schulze Oswald Kg | Water extraction equipment for reservoir - has overflow pipe supported by float and guided on stand-pipe |
| DE3601094A1 (en) * | 1986-01-16 | 1987-07-23 | Willi Dipl Ing Hoerdemann | Device for drawing off a constant water quantity from a basin |
| GB2312177A (en) * | 1996-04-17 | 1997-10-22 | Frembgen Fritz Herbert | Device for removing the surface layer of liquids |
| DE19804160A1 (en) * | 1998-02-03 | 1999-09-09 | Fresenius Chemische Und Biolog | Automatic thrust drainage appliance for clean and contaminated fluids, preferably for the sewage industry |
| DE102008049693A1 (en) * | 2008-09-19 | 2010-04-01 | Technische Universität Dresden | Adjustable water extraction device for dams and lakes, has water reservoir in pipe with height-adjustable water inlet and water outlet side |
| CN104074262A (en) * | 2014-07-11 | 2014-10-01 | 北京建筑大学 | Intelligent dirt intercepting device for rainwater inspection shaft |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107763271B (en) | 2019-06-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201874085U (en) | Catch basin with self treatment function | |
| KR101622222B1 (en) | Rainwater utilizing apparatus for drought and flood damage and sink hole prevention | |
| JP5737675B2 (en) | Sabo weir | |
| CN107794954B (en) | Anti-floating water leakage pressure relief structure | |
| KR100783747B1 (en) | Drain pipe | |
| KR100623432B1 (en) | Water conservation and improvement method of lake or reservoir and its device | |
| CN105863038B (en) | A kind of early-stage rainwater stream abandoning device | |
| CN207749602U (en) | Rainwater seepage well for greenery patches in one residential and pavement | |
| JP4661460B2 (en) | Rainwater runoff control system and method for constructing rainwater runoff control system | |
| CN104878825A (en) | High-capacity impound pipeline rainwater impounding and discharging system and method | |
| CN207047994U (en) | A kind of Water-quality control shunting well | |
| KR101267377B1 (en) | Flood protection water storage system to store water naturally | |
| KR100572507B1 (en) | Overflow discharge chamber | |
| CN104831682B (en) | A kind of flood storage prevention waterlogging device increasing city river reservoir storage | |
| KR101962037B1 (en) | Manhole of rain water with flood control function of infiltration structure | |
| CN107763271B (en) | Itself a kind of novel skimming formula current limliting permanent flow valve | |
| CN206385741U (en) | A kind of siphon drainge system for building | |
| CN110284551A (en) | A kind of sponge urban rainwater collection purification device | |
| CN208618531U (en) | A kind of basement structure water guiding system | |
| CN209603264U (en) | Inlet for stom water with function of shutting off | |
| CN107265615A (en) | One kind interflow, mixed flow rain sewage water treatment method and system | |
| JP2005282206A (en) | Rainwater intake device and rainwater storage device | |
| JP5695495B2 (en) | Overlay structure | |
| CN206581383U (en) | A kind of infiltration type storm detention tank | |
| EP3976895A1 (en) | Underground stormwater storage system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |