EP1546474B1 - Drain d'evacuation des eaux pluviales - Google Patents

Drain d'evacuation des eaux pluviales Download PDF

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Publication number
EP1546474B1
EP1546474B1 EP03794377A EP03794377A EP1546474B1 EP 1546474 B1 EP1546474 B1 EP 1546474B1 EP 03794377 A EP03794377 A EP 03794377A EP 03794377 A EP03794377 A EP 03794377A EP 1546474 B1 EP1546474 B1 EP 1546474B1
Authority
EP
European Patent Office
Prior art keywords
stormwater
filter
channel
sand trap
drain
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.)
Expired - Lifetime
Application number
EP03794377A
Other languages
German (de)
English (en)
Other versions
EP1546474A1 (fr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Svenska Consolid AB
Original Assignee
Svenska Consolid AB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Svenska Consolid AB filed Critical Svenska Consolid AB
Publication of EP1546474A1 publication Critical patent/EP1546474A1/fr
Application granted granted Critical
Publication of EP1546474B1 publication Critical patent/EP1546474B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
    • E03F5/0401—Gullies for use in roads or pavements
    • E03F5/0404—Gullies for use in roads or pavements with a permanent or temporary filtering device; Filtering devices specially adapted therefor
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F1/00—Methods, systems, or installations for draining-off sewage or storm water

Definitions

  • a countersink has quite simply been provided, a so-called sand trap, in which grit and the like are accumulated and stay there while the water runs off through an outlet and further into the sewer system. Where necessary, for example when the accumulated matter fills the greater part of the sand trap, this is emptied.
  • stormwater contains many pollutants that are dissolved in the water, for example copper, lead, mercury, other heavy metals, petrol, solvents etc.
  • pollutants for example copper, lead, mercury, other heavy metals, petrol, solvents etc.
  • the quantity and type of pollutants depend largely on the environment which surrounds each stormwater drain. Hence, the level of pollution is higher in areas of dense traffic, at filling stations and in certain industrial estates. Even the type of roof
  • the present invention relates to a stormwater drain comprising an openable grid, a first filter for treating the stormwater, a sand trap for collecting solid pollutants, a channel connected to the sand trap for emptying thereof, and an outlet for the treated stormwater, whereas the filter is disposed outside and around the channel with a circumferential surface which is permeable for realising a radial flow component in the stormwater through the filter.
  • covering in a residential area may affect the level of pollution in the stormwater, since acidic rainwater may release certain metals from roofs of, for example, copper sheeting.
  • the object of the present invention is thus to realise a stormwater drain which features both filtering and separation of sold pollutants, in which the emptying of the solid pollutants may be simply and rapidly carried out.
  • the degree of treatment in the filtering operation must be at least on a par with prior art systems.
  • the object of the present invention is to create an efficient stormwater drain of the art mentioned introductorily, that features both filtering and separation of solid pollutants in an efficient way, and that enables easy emptying of sand from the sand trap.
  • the first filter is disposed above the sand trap, which is defined by an upper wall, which extends in the transversal direction of the drain, which upper wall is arranged to separate the filtered stormwater from the untreated stormwater within the sand trap and the channel.
  • Fig. 1 shows a stormwater drain which is largely constructed as follows. Uppermost, i.e. at ground level, there is disposed a grid 2 which permits the passage of the stormwater or rainwater while coarser solid objects such as branches are separated off. Below the grid, there is disposed a connecting section 3 which leads the water that has passed through the grid 2 down into a subjacent channel 4.
  • filters 5 and 6 which, in the preferred embodiment, are two in number.
  • the channel 4 discharges in a sand trap 7 where solid particles in the stormwater, such as sand and grit fall to the bottom and remain there.
  • a sand trap 7 where solid particles in the stormwater, such as sand and grit fall to the bottom and remain there.
  • an outlet 8 for leading off the filtered stormwater.
  • the apertures in the grid 2 should permit as much water as possible to run through the grid 2 during a predetermined period of time, at the same time as the apertures and there shape in the grid 2 lead to an efficient separation of solid pollutants and foreign matter.
  • the grid 2 may be opened, which can be realised for example in that the grid is hinged or in that it can be lifted off entirely. Possibly, opening of the grid 2 may require some form of special tool or implement in order to impede unauthorised access to the stormwater drain.
  • the connecting section 3 is substantially funnel-shaped. Its upper edge 9 extends around the apertures in the grid 2 so that all water which runs through the grid is entrapped by the connecting section 3 and led downwards into the stormwater drain 1. At the same time, the connecting section 3 conceals those parts of the stormwater drain which are disposed outside the channel 4. As a result, potential vandals are not tempted to attack the stormwater drain 1.
  • the upper edge 9 is fixedly clamped between a downwardly extending flange 10 on the underside of the grid 2 and a clamping member 11.
  • the lower region of the connecting section 3 is designed as a spillway overflow 12.
  • the channel 4 will be filled.
  • the spillway overflow 12 is disposed such that unfiltered stormwater is led past the filters 5 and 6 to the outlet 8.
  • the channel 4 leads down to the sand trap 7.
  • the channel 4 thus extends through the greater part of the stormwater drain 1.
  • the channel 4 is substantially vertical so as to make for the lowering of a hose or the like for sucking up sand, leaves, sludge and other solid matter which has sedimented to the bottom of the sand trap 7.
  • the only requirement for emptying the sand trap 7 is that the grid 2 is opened or lifted off. Consequently, emptying is considerably simplified and, as a result, requires less physical effort and time consumption. At the same time, there is no reduction in the efficiency of the filtering of the water.
  • the channel 4 In order that the water in the channel 4 will reach the first filter 5, the channel 4 is provided with a large number of holes through which the water flows out to the first filter 5.
  • the size of the holes 13 is mutually uniform in Fig. 1 , but it is possible to vary the hole size along the length of the channel 4 in order to realise an optimum distribution of the water flow through the first filter 5.
  • the first filter 5 is disposed outside the channel 4 as a sleeve or a pipe with relatively thick walls.
  • the pipe is cylindrical, but may naturally also have other configurations, for example a rectangular or hexagonal cross section.
  • This form of the first filter 5 makes it possible for the sand trap 7 to be emptied through the channel 4 without the first filter 5 needing to be dismounted.
  • the first filter 5 is disposed for a flow with a component which is substantially radial.
  • the pressure in the water column which is in the channel 4 is equal in all directions at a given depth, and the radial flow component is hereby imparted to the water, which is desirable in the flow through the first filter 5.
  • Capillary forces in the mass in the first filter 5 also contribute to the radial flow component. However, these forces acct in all directions, including downwards.
  • the force of gravity also acts straight downwards. Taken as a whole, the water will flow obliquely downwards and outwards through the first filter 5.
  • the outer defining surfaces of the filter 5 are permeable so that the treated water may pass therethrough and run downwards along the circumferential surface or side surfaces 19 of the first filter 5.
  • a second filter 6 is provided below the first filter 5. Like the fist filter 5, the second filter 6 is disposed around the channel 4 and outside it. The flow path through the second filter 6 differs, however, from that through the first filter 5.
  • the second filter 6 is permeable at its upper and lower ends so that the flow path through the second filter 6 will be substantially axial. All water that flows out from the first filter 5 is entrapped on the upper surface 14 of the second filter 6. In the second filter 6, the circumferential surface is watertight.
  • the channel 4 is similarly completely tight in the region of the second filter 6. Thus, radial flow through the second filter 6 is avoided.
  • the filtering materials in the two filters 5 and 6 differ from one another in the preferred embodiment. Typically, they are disposed to filter off and bond different types of pollutants. As a result, the filter complement one another and improved purification treatment is attained compared with if only one filter had been provided.
  • the sand trap 7 In the sand trap 7, grit and other solid pollutants sink to the bottom and can thereafter be collected.
  • the sand trap 7 has a sealing, upper wall 15 which separates the immediately accumulated water inside the sand trap 7 and the channel 4 from the water which had been filtered through the filters 5 and 6 and which is to be led off through the outlet 8.
  • the stormwater drain 1 works as follows. Stormwater, or rainwater, falls down through the grid 2 via the connecting section 3 and down into the channel 4. When the water flows downwards through the channel 4, only a minor fraction will reach the filter 5. Instead, the water runs down to the sand trap 7 where the solid pollutants sediment to the bottom. The water level in the sand trap 7 rises and will in due course reach a distance up in the channel 4. When the water level has risen so far that it reaches up to the holes 13 inside the first filter 5, the water will flow outwards through the filter 5 and also downwards therethrough. When the water has reached the outside 19 of the first filter 5, it runs along the outside and down into the second filter 6. The water is filtered in the second filter 6 and runs out through its bottom 20 and further out to the space 16 above the sand trap 7 from whence it is led out through the outlet 8.
  • the channel 4 is surcharged to a level above the holes 13 and does not have time to flow out through the filter 5 at a sufficiently rapid rate.
  • the unfiltered water runs out through the spillway overflow 12 and past the filters 5 and 6.
  • unfiltered water will reach the outlet 8, which is not desirable.
  • the system should therefore be dimensioned so that this situation practically never occurs.
  • a stormwater drain 1 according to the present invention may need to be modified somewhat, since the dimensions of the prior art stormwater drains vary within generous limits. It is conceivable that the sand trap 7, in the manner illustrated in Fig. 2 , does not reach out to the outer walls 17 of the drain shaft. This will have as a result that the collection space 16 is disposed not only above the upper wall of the sand trap 7 but also between the circumferential surface 18 of the sand trap 7 and the outer wall 17 of the drain shaft. This has no major effect on the function of the stormwater drain, other than that greater volumes of filtered stormwater are retained in the stormwater drain before running off through the outlet 8.
  • Another method of modifying the present invention is to provide additional filters.
  • these additional filters are designed as the second filter 6 and are disposed below it.
  • the outer diameter of the additional filters is equal to or slightly larger than the immediately superjacent filter, so that the water that runs out therefrom is reliably entrapped by the subjacent filter.
  • a larger number of filters permits a purification treatment in additional steps where the filter compounds are adapted so as to filter off and retain different types of pollutants.
  • the present invention may be further modified without departing from the scope of the appended Claims.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Health & Medical Sciences (AREA)
  • Filtration Of Liquid (AREA)
  • Revetment (AREA)
  • Catching Or Destruction (AREA)
  • Water Treatment By Sorption (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Valve Device For Special Equipments (AREA)
  • Semiconductor Lasers (AREA)
  • Inorganic Insulating Materials (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Led Devices (AREA)
  • Glass Compositions (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Treatment Of Water By Ion Exchange (AREA)

Claims (5)

  1. Drain d'évacuation des eaux pluviales (1) comprenant une grille ouvrable (2), un premier filtre (5) pour traiter les eaux pluviales, un dessableur (7) pour recueillir des polluants solides, un canal (4) relié au dessableur (7) pour vider celui-ci, et un orifice de sortie (8) pour les eaux pluviales traitées, tandis que le filtre (5) étant disposé à l'extérieur et autour du canal (4) s'étendant verticalement, avec une surface circonférentielle (19) qui est perméable pour réaliser une composante radiale d'écoulement dans des eaux pluvialts à travers le filtre (5)
    caractérisé en ce que
    le premier filtre (5) est disposé au-dessus du dessableur (7), qui est défini par une paroi supérieure (15), qui s'étend transversalement par rapport à la direction longitudinale du drain, laquelle paroi supérieure (15) est disposée afin de séparer les eaux pluviales filtrées des eaux pluviales non traitées dans le dessableur (7) et le canal (4).
  2. Drain d'évancuation des eaux pluviales selon la revendication 1,
    caractérisé en ce que
    un tronçon de connexion (3) d'une configuration en entonnoir est disposé entre la grille (2) et le canal (4).
  3. Drain d'évacuation des eaux pluviales selon la revendication 1 ou 2,
    caractérisé en ce que
    un trop-plein de déversement (12) est agencé dans le canal, (4) pour guider les eaux pluviales à travers le filtre (5).
  4. Drain d'évacuation des eaux pluviales selon l'une quelconque des revendications 1 à 3.
    caractérisé en ce que
    au moins un filtre supplémentaire (6) est agencé au-dessous du premier filtre (5).
  5. Drain d'évacuation des eaux pluviales selon la revendication 4,
    caractérisé en ce que
    le filtre supplementaire (6) a des surfaces limites supérieure et inférieure perméables (14, 20) pour réaliser une composante axiale d'écoulement à travers le filtre (6).
EP03794377A 2002-09-04 2003-08-25 Drain d'evacuation des eaux pluviales Expired - Lifetime EP1546474B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE0202620 2002-09-04
SE0202620A SE523678C2 (sv) 2002-09-04 2002-09-04 Dagvattenbrunn med väsentligen sluten sandfälla, men uppåt öppen och filter anordnat ovanför
PCT/SE2003/001290 WO2004022864A1 (fr) 2002-09-04 2003-08-25 Drain d'evacuation des eaux pluviales

Publications (2)

Publication Number Publication Date
EP1546474A1 EP1546474A1 (fr) 2005-06-29
EP1546474B1 true EP1546474B1 (fr) 2009-12-02

Family

ID=20288896

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03794377A Expired - Lifetime EP1546474B1 (fr) 2002-09-04 2003-08-25 Drain d'evacuation des eaux pluviales

Country Status (7)

Country Link
EP (1) EP1546474B1 (fr)
AT (1) ATE450669T1 (fr)
AU (1) AU2003254984A1 (fr)
DE (1) DE60330367D1 (fr)
DK (1) DK1546474T3 (fr)
SE (1) SE523678C2 (fr)
WO (1) WO2004022864A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE368154T1 (de) * 2005-04-01 2007-08-15 Ingenieurgesellschaft Prof Dr Mehrstufige filterpatrone zum einsetzen in strassenabläufe
IT1392959B1 (it) * 2009-02-18 2012-04-02 Gasparotto Dispositivo di disinfestazione per drenaggi.
CN102392486B (zh) * 2011-12-06 2013-07-10 重庆大学 一种城市道路暴雨径流除砂装置
CN110984337B (zh) * 2019-10-28 2020-11-27 中国一冶集团有限公司 一种市政排水管道过滤结构

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE512577C2 (sv) * 1997-11-26 2000-04-03 Birger Elofsson Filterkassett i brunn
DE29915075U1 (de) * 1999-08-27 2000-02-24 Karl Hailfinger GmbH & Co. KG, 72820 Sonnenbühl Schacht-Versickerungssystem zur Versickerung von Regenwasser
GB2360713B (en) * 2000-03-30 2003-08-13 Barr & Wray Ltd Run off water treatment and filtration device

Also Published As

Publication number Publication date
SE523678C2 (sv) 2004-05-11
EP1546474A1 (fr) 2005-06-29
DE60330367D1 (de) 2010-01-14
DK1546474T3 (da) 2010-04-12
AU2003254984A1 (en) 2004-03-29
WO2004022864A1 (fr) 2004-03-18
ATE450669T1 (de) 2009-12-15
SE0202620D0 (sv) 2002-09-04
SE0202620L (sv) 2004-03-05

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