WO2013078513A1 - Stormwater filtration grate - Google Patents

Stormwater filtration grate Download PDF

Info

Publication number
WO2013078513A1
WO2013078513A1 PCT/AU2012/001467 AU2012001467W WO2013078513A1 WO 2013078513 A1 WO2013078513 A1 WO 2013078513A1 AU 2012001467 W AU2012001467 W AU 2012001467W WO 2013078513 A1 WO2013078513 A1 WO 2013078513A1
Authority
WO
WIPO (PCT)
Prior art keywords
support base
filtration
stormwater
grate
filtration medium
Prior art date
Application number
PCT/AU2012/001467
Other languages
English (en)
French (fr)
Inventor
Rhys Lathlain Eddy
James John Tanner
Original Assignee
Envirostream Solutions Pty Ltd
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
Priority claimed from AU2011905033A external-priority patent/AU2011905033A0/en
Application filed by Envirostream Solutions Pty Ltd filed Critical Envirostream Solutions Pty Ltd
Priority to US14/362,069 priority Critical patent/US20140305855A1/en
Priority to EP12853215.7A priority patent/EP2785924A4/en
Priority to CN201280064637.6A priority patent/CN104105832B/zh
Priority to AU2012344735A priority patent/AU2012344735A1/en
Publication of WO2013078513A1 publication Critical patent/WO2013078513A1/en
Priority to IL232907A priority patent/IL232907A0/en
Priority to AU2017221901A priority patent/AU2017221901B2/en

Links

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
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/14—Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • 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
    • E03F5/06—Gully gratings
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/496—Multiperforated metal article making
    • Y10T29/49604—Filter

Definitions

  • the present invention relates to filtering stormwater. More particularly, but not exclusively, the invention relates to a stormwater filtration grate and methods of forming same.
  • Sediment and other contaminants in stormwater runoff can clog collection systems and pollute waterways in which the runoff flows into. It is desirable to filter stormwater runoff to reduce the chances of collection systems becoming clogged and to improve the quality of water flowing into waterways. It is also desirable to provide such filtration systems that are simple and cheap to manufacture and can be easily serviced.
  • Stormwater filtration grates can provide a practical method of filtering stormwater runoff before it enters collection systems. However, previous stormwater filtration grates can be expensive to manufacture.
  • Examples of the invention seek to solve, or at least ameliorate, one or more disadvantages of previous stormwater filtration grates.
  • a stormwater filtration grate comprising a frame having a support base, and a filtration medium through which. the stormwater can flow, the filtration medium being supported by the support base and the support base being of unitary construction.
  • the support base is pressed from a metal sheet.
  • a stormwater filtration grate comprising a frame having a support base, and a filtration medium through which the stormwater can flow, the filtration medium being supported by the support base and the support base being pressed from a metal sheet.
  • the support base is formed from a single sheet of material.
  • the support base includes outer support members which define a space through which liquid can flow, wherein a portion of the outer support members which is lowermost in use extends inwardly so that the space constricts along a flow path of the liquid to support the filtration medium.
  • the support base further includes inner support members extending laterally across the grate, a lower surface of the inner support members extending inwardly to support the filtration medium.
  • the filtration medium comprises aggregate set in an epoxy resin matrix.
  • the aggregate includes basalt.
  • the filtration medium is formed in situ.
  • a method of manufacturing a stormwater filtration grate comprising the steps of: forming a support base, the support base being of unitary construction and at least partially defining a space through which liquid can flow; and applying a filtration medium to the support base to filter liquid flowing through the space.
  • the support base is formed using a pressing operation.
  • the support base is formed by pressing a metal sheet.
  • a method of manufacturing a stormwater filtration grate comprising the steps of: forming a support base by pressing a metal sheet, the support base at least partially defining a space through which liquid can flow; and applying a filtration medium to the support base to filter liquid flowing through the space.
  • the support base is pressed from a single sheet.
  • the pressing operation can include a trimming operation.
  • the filtration medium comprises aggregate set in an epoxy resin matrix, the filtration medium being cast in situ by casting within the support base.
  • Figure 1 is an upper perspective view of a stormwater grate of one embodiment of the invention
  • Figure 2 is an underneath view of a support pan of the stormwater grate; and Figure 3 is a sectional side view of the stormwater grate.
  • a stormwater filtration grate 10 according to a preferred embodiment of the present invention is shown in Figure 1.
  • the stormwater filtration grate 10 is configured to cover a stormwater pit and to filter stormwater runoff flowing into the pit.
  • the stormwater filtration grate 11 includes a frame 12 having a support base 14, which is shown in Figure 2, and a filtration medium (not shown) through which the stormwater can flow.
  • the filtration medium is supported by the support base 14 and the support base 14 is of unitary construction.
  • the support base 14 includes outer support members 16 which define a space 18 through which liquid can flow.
  • a portion of the outer support members 16 which is lowermost in use extends inwardly so that the space 18 constricts along a flow path of the liquid to support the filtration medium.
  • a force which acts in a direction of the liquid flow will be exerted on the filtration medium.
  • the filtration medium can be held in position by an interference fit caused by the outer support members which act on a lower surface of the filtration medium.
  • the filtration medium is fixed within the stormwater filtration grate on its upper surface by grid members 22, 24 of the frame 12.
  • Grid members 22, 24 extend transversely across the frame 12 and provide structural support to the stormwater filtration grate 10 so that it can support the weight of vehicles and pedestrians so that it is suitable for use in trafficable areas.
  • an upper surface of the filtration medium will be at a level which is below an upper surface of the grid members 24 so that the weight of traffic and pedestrians passing over the stormwater filtration grate 10 will bear upon the grid members 24.
  • the weight of vehicles and pedestrians is not required to be supported by the filtration medium, thereby increasing the load limit of the stormwater filtration grate 10.
  • the support base 14 further includes inner support members 20 which extending laterally across the grate to form a cross-shaped brace. Similar to the outer support members 16, a lower surface of each of the inner support members 20 also extends inwardly to support a lower surface of the filtration medium.
  • the support base 14 is formed from a single sheet of material.
  • the support base is pressed from a metal sheet, such as galvanised mild steel.
  • the support base is pressed from a metal sheet, which may or may not be a single sheet of material.
  • Present stormwater filtration grates are constructed by welding pre-formed sections of metal together. Such processes can be expensive and time consuming.
  • the support base 14 is configured so as to have sufficient strength to support the filtration medium. As the filtration medium is not required to be load bearing, the required strength of the support base 14 can be reduced.
  • the described support base 14 is formed from metal, a person skilled in the art will appreciate that the support base 14 may be formed of other materials, such as plastics, and formed using conventional forming processes such as vacuum, injection, blow or rotational moulding.
  • the filtration medium (not shown) comprises aggregate set in an epoxy resin matrix.
  • the aggregate is a blue stone material, such as that which includes basalt. It will be appreciated that the aggregate can be formed of other materials and that other resins or binding agents may similarly be used to form a filtration medium.
  • the filtration medium is formed or cast in situ in the support base 14. Dimensional variance of previous support bases can make it difficult to secure a filtration medium within a stormwater filtration grate. Forming the filtration medium in situ allows the filtration medium to accommodate such dimensional variances. Furthermore, forming the filtration medium in situ avoids the need to have a number of separate moulds for forming the filtration medium, thereby reducing tooling costs for manufacturing.
  • the stormwater filtration grate 10 is manufactured by forming a support base 14 which is of unitary construction.
  • the support base 14 is formed so as to least partially define a space through which liquid can flow.
  • a filtration medium is then applied to the support base 14 to filter liquid flowing through the space.
  • the support base 14 is formed using a pressing operation and is pressed from a metal sheet.
  • the support base is formed by pressing a metal sheet, which may or may not be a single sheet.
  • the pressing operation is a general metal forming operation which may include one or steps and may be in the form of stamping, coining or other known forming operations.
  • the pressing operation can include a trimming operation in which an outline of the support base 14 is formed at the same time as it is pressed.
  • the filtration medium is cast in situ by casting within the support base 14.
  • the support base 14 is formed and then the frame 12 is fixed to the support base 14 using a welding process, for example.
  • the frame 12 may be generally in accordance with conventional grates used to cover stormwater drainage pits and incorporate conventional lock-down and lifting points.
  • the frame 12 may be formed using conventional welding processes.
  • the support base 14 and frame are then secured to a casting bed or casting surface so that the support base 14, the frame 12 and the casting surface define a mould in which the filtration medium is cast.
  • the aggregate is mixed with the epoxy resin and the mixture is poured into the mould and allowed to cure. After the mixture is poured, a vibration settling process may be used to settle the mixture.
  • the mixture is poured to a level just below an uppermost surface of the frame 12 so that the weight of traffic or pedestrians passing over the stormwater filtration grate 10 will bear upon the frame.
  • the stormwater filtration grate 10 has good stormwater filtration properties without being limited to low weight bearing applications because the strength of the stormwater filtration grate 10 is not dictated by the strength of the filtration medium.
  • the filtration medium is formed as a single block, though it will be appreciated that the inner support members 20 may be configured so as to divide the mould so that four discrete filtration mediums are formed.
  • the stormwater filtration grate 10 can be installed as an assembly and also removed for cleaning as an assembly.
  • the embodiments have been described by way of example only and modifications are possible within the scope of the invention disclosed.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Revetment (AREA)
  • Filtering Materials (AREA)
PCT/AU2012/001467 2011-12-02 2012-11-30 Stormwater filtration grate WO2013078513A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US14/362,069 US20140305855A1 (en) 2011-12-02 2012-11-30 Stormwater filtration grate
EP12853215.7A EP2785924A4 (en) 2011-12-02 2012-11-30 GRILLE FOR THE FILTRATION OF RAINWATER
CN201280064637.6A CN104105832B (zh) 2011-12-02 2012-11-30 雨水过滤格栅
AU2012344735A AU2012344735A1 (en) 2011-12-02 2012-11-30 Stormwater filtration grate
IL232907A IL232907A0 (en) 2011-12-02 2014-06-01 A trellis for filtering storm water
AU2017221901A AU2017221901B2 (en) 2011-12-02 2017-09-04 Stormwater filtration grate

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2011905033A AU2011905033A0 (en) 2011-12-02 Stormwater filtration grate
AU2011905033 2011-12-02

Publications (1)

Publication Number Publication Date
WO2013078513A1 true WO2013078513A1 (en) 2013-06-06

Family

ID=48534537

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2012/001467 WO2013078513A1 (en) 2011-12-02 2012-11-30 Stormwater filtration grate

Country Status (6)

Country Link
US (1) US20140305855A1 (zh)
EP (1) EP2785924A4 (zh)
CN (1) CN104105832B (zh)
AU (2) AU2012344735A1 (zh)
IL (1) IL232907A0 (zh)
WO (1) WO2013078513A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD942594S1 (en) * 2019-11-13 2022-02-01 Everhard Industries Pty Ltd Drain grate
USD941967S1 (en) * 2019-11-13 2022-01-25 Everhard Industries Pty Ltd Drain grate

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6045691A (en) * 1998-08-21 2000-04-04 Mcdermott; Holly S Sewer eco-collar for opening with covers
US6562233B1 (en) * 1998-11-13 2003-05-13 Pactec, Inc. Storm drain line with riser 2
US20050067338A1 (en) * 2001-11-20 2005-03-31 Page Ardle E. Subgrate drain basin filter
US7132045B1 (en) * 2004-10-07 2006-11-07 Trangsrud & Associates, Inc. Sanitary, storm and catch basin trap with filter insert

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2215326A (en) * 1988-03-08 1989-09-20 Keletmagyarorszagi Vizuegyi Multilayer porous structure, particularly for the separation of liquid and solid phases
CN1036146A (zh) * 1988-03-11 1989-10-11 凯来特玛戴罗萨吉·维茨戴埃佩塔伊帕利·瓦拉拉特 用于液相和固相分离的多层多孔结构
US5037541A (en) * 1990-05-30 1991-08-06 Ruey Jang Shiau Sanitary device for sewerage channel
US5733445A (en) * 1996-07-25 1998-03-31 Fanelli; Anthony T. Storm sewer catch basin filter
US6149803A (en) * 1998-08-28 2000-11-21 Atlantic Contruction Fabrics, Inc. Storm sewer catch basin filter
US6530722B1 (en) * 2001-09-14 2003-03-11 Mark D. Shaw Drain sealing device
GB2410282B (en) * 2004-01-20 2009-10-28 Tarmac Ltd Water management system
CN2801912Y (zh) * 2005-03-29 2006-08-02 陈正錞 排水沟盖
CN2887988Y (zh) * 2006-01-16 2007-04-11 苏放 带防护网的泄水板
CN201232254Y (zh) * 2008-07-19 2009-05-06 卜昭全 水沟盖
KR101130770B1 (ko) * 2010-03-15 2012-03-28 (주)한미글로벌건축사사무소 개량형 그레이팅 및 이를 이용한 배수구의 그레이팅 구조

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6045691A (en) * 1998-08-21 2000-04-04 Mcdermott; Holly S Sewer eco-collar for opening with covers
US6562233B1 (en) * 1998-11-13 2003-05-13 Pactec, Inc. Storm drain line with riser 2
US20050067338A1 (en) * 2001-11-20 2005-03-31 Page Ardle E. Subgrate drain basin filter
US7132045B1 (en) * 2004-10-07 2006-11-07 Trangsrud & Associates, Inc. Sanitary, storm and catch basin trap with filter insert

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2785924A4 *

Also Published As

Publication number Publication date
AU2012344735A1 (en) 2014-07-24
US20140305855A1 (en) 2014-10-16
AU2017221901A1 (en) 2017-09-28
CN104105832B (zh) 2017-05-10
EP2785924A1 (en) 2014-10-08
CN104105832A (zh) 2014-10-15
IL232907A0 (en) 2014-07-31
EP2785924A4 (en) 2015-12-30
AU2017221901B2 (en) 2019-01-17

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