WO1983001268A1 - A filtering and collecting device for water drains - Google Patents

A filtering and collecting device for water drains Download PDF

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Publication number
WO1983001268A1
WO1983001268A1 PCT/SE1982/000300 SE8200300W WO8301268A1 WO 1983001268 A1 WO1983001268 A1 WO 1983001268A1 SE 8200300 W SE8200300 W SE 8200300W WO 8301268 A1 WO8301268 A1 WO 8301268A1
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WO
WIPO (PCT)
Prior art keywords
filtering
holder ring
grating
coarse
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.)
Ceased
Application number
PCT/SE1982/000300
Other languages
French (fr)
Inventor
Oscar Sven Arntyr
Thord Ingemar Engstroem
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE8282902998T priority Critical patent/DE3265440D1/en
Priority to AT82902998T priority patent/ATE14906T1/en
Publication of WO1983001268A1 publication Critical patent/WO1983001268A1/en
Priority to DK2361/83A priority patent/DK236183D0/en
Priority to FI834003A priority patent/FI834003A7/en
Anticipated expiration legal-status Critical
Ceased 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
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/12—Plumbing installations for waste water; Basins or fountains connected thereto; Sinks
    • E03C1/26—Object-catching inserts or similar devices for waste pipes or outlets
    • E03C1/262—Object-catching inserts or similar devices for waste pipes or outlets combined with outlet stoppers
    • 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

Definitions

  • the present invention relates to water drains of the kind provided with an outer drain grating which acts as a drain cover to prevent accidents and as a means for preventing coarse material from passing down into the drain, and more particularly to a device for use in such drains to separate and collect particulate impurities, such as sand, wooden pegs .and leaves, and. also liquid impurities, such as oil, passing through the' grating.
  • the .capacity and/or efficiency of such devices is, or are, at times arguably lacking, the former defficiency resulting in flooding and the latter deff.i- ciency enabling contaminants to enter the drains, which contaminants must be flushed away or sucked out at given intervals of time.
  • the known devices effective in separating oil or other liquid impurities from the drain water passing through the grating.
  • these known devices are difficult to empty, and the work of emptying the devices is unhygienic.
  • the purchase price of the known devices is often relatively high, as is also the cost incurred when changing the collecting vessels.
  • the main object of the present invention is to provide a simple and effective separating and collecting device which can be manufactured and mounted in position at low costs and used in drains of widely varying design, thereby eliminating the aforementioned dis ⁇ advantages.
  • the device shall also be capable of filtering out oil and other liquid impurities to a certain extent.
  • the aforementioned objects are achieved in accordance with the invention by providing a device of the aforementioned- kind with two separation stages, of which the last stage is a fine-filtering stage utilizing a water-permeable cloth.
  • the device according to the invention is particularly characterized in that it comprises a holder ring intended to be mounted beneath the drain grating, said holder ring carrying a combination of at coarse- filtering and protecting means and a fine-filtering means; that the coarse-filtering and the protecting means is cup shaped and arranged in the holder ring; and that the fine-filtering means comprises a filter bag made of a flexible and water-permeable cloth or fabric material and arranged around the holder ring.
  • Such a filtering and collecting device is of extremely simple construction, it is also cheap to manufacture and can readily be stored and mounted in position, in addition to which the use of a flexible bag enables the device to be installed in different kinds of known drainage systems, irrespective of whether the grating is centred relative to the remainder of the drain or not.
  • the use of a filtering fabric material also enables the device to be used for separating oil and other viscous liquid impurities from the drainage water.
  • the impurities are separated in two stages when using a device constructed in accordance with the invention, said two stages being additional to the separation of. coarse particulate material by the drain grating, it is possible to combine effective separation and collection with an effective through flow of the drainage water.
  • Coarse particles such as gravel, leaves and the like, are captured in the first separating stage and consequently do not impair the permeability of the relatively fine-mesh filtering bag, which - as afore ⁇ mentioned - can be adapted to permit oil and other liquid impurities to be filtered off. For example, if leaves were permitted to freely enter the bag, the bag would rapidly become blocked.
  • the holder ring is funnel-shaped and provided with a mounting flange arranged to be clamped firmly under the drain grating, and the filtering bag is suspended from the outer surface of the holder ring.
  • the means for filtering coarse material is funnel-shaped and provided with a mounting flange arranged to be clamped firmly under the drain grating, and the filtering bag is suspended from the outer surface of the holder ring.
  • OMPI and for protecting the bag has the form of a wire basket so constructed as to form a gap between said means and the surrounding holder.ring. This enables maximum use of the volumetric capacity of the basket.
  • the height or thickness of the holder ring should be less than half the height of a grating-support means carrying said drain grating, to enable the device according to the invention to be readily mounted also in drains in which said grating-support means is not centred.
  • the bag is openable at its lower end, thereby enabling the bag to be readily emptied in a hygienic manner, and also enabling the bag volume to be adapted to existing requirements.
  • the filtering bag is suitably provided adjacent its upper end with overflow openings, to provide increased flow possibilities when so required, for example in the case of heavy * downpours.
  • Figure 1 illustrates schematically the components forming a device according to the invention.
  • Figure 2 illustrates a -device according to the invention mounted in ' a water .drain.
  • Figure 3 is a. partly cut-away perspective view of a modified embodiment of a device according to the invention.
  • the device illustrated in Figure 1 includes a funnel-shaped holder ring 1, which serves firstly to hold the coarse-filtering means, said means having the form of a wire basket 2 which can be inserted in the
  • the tapes 9 also enable the volumetric capacity of the bag to be adjusted in dependence upon existing requirements, and also enable the bag to be emptied in a hygienic fashion without requiring the bag to be turned upside down. In this regard, the bag is simply lifted by the handle 5 and the tapes 9 loosened, whereupon the contents of the bag will fall into a container intended therefor.
  • the combination of" ire basket and filter bag is greatly advantagous, since in this way it is possible to combine effective separation of contaminating materials, including liquid impurities such as oil and the like, with an effective through-flow of the drainage water.
  • the wire basket 2 does not only serve as a coarse—filtering means, but also to protect the bag from intentional or unintentional damage, e.g. by means of sticks inserted into the drain through the grating.
  • FIG. 2 illustrates schematically the manner in which the device according to the invention is mounted in a water drain.
  • the reference 11 identifies the grating-support means which carries a drain grating 12, -under which the mounting flange 6 of the holder ring 1 is firmly pressed.
  • the grating-support means 11 res ' ts on a number of adjustment rings 14 and is not centred relative to the lower part 13 of the drain.
  • Such lateral displacement of the grating-support, means is quite common, for example in drains located in street gutters, and can in practice be much greater than that illustrated in the drawing. With drains of this kind it is necessary for the collecting means to have the form of a flexible bag, since otherwise a means of special design must be manufactured.
  • the height or- thichness of the holder ring 1 shall be smaller than the height or depth of the grating-support means 11, and preferably not more than about half the height or depth of said grating-support means.
  • Figure 3 illustrates a device according to the invention for use in a drain in which the grating is accommodated in a rectangular opening.
  • the device has the same design as the design illustrated in Figures 1 and 2, and hence no additional description of this embodiment is required.
  • the " references used in Figure 3 identify the same elements as the references previously used.
  • the device according to the invention thus comprises only three parts, which can be manufactured at low costs. .
  • the device requires. the minimum of space for storing and transporting the same. That part of the device which is subjected to the most wear is the bag, which can be replaced with a new bag at relatively low cost when necessary.
  • the use of a bag according to the invention also prevents water from collecting, such water collections being prone to freeze in cold weather and generating unpleasant odours in dry periods.
  • the bag can be mounted in any position of rotation whatsoever.
  • a bag also provides a very large filtering area, which can be adjusted as required.
  • a device according to the invention can be modified in several respects within the scope of the Claims.
  • its geometric shape can be adjusted to the drain in which it is to be mounted.
  • the coarse-filtering means may, in addition to a wire basket, also comprise another cup- shaped container having good permeability.
  • An essential feature of the device according to the invention is that it comprises two separating stages, of which the last stage includes a flexible cloth or fabric material to provide a fine filtering effect, while the first stage serves to separate coarse material from the drainage water and to protect the bag.

Landscapes

  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Environmental & Geological Engineering (AREA)
  • Filtration Of Liquid (AREA)
  • Sewage (AREA)
  • Water Treatment By Sorption (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Filtering Materials (AREA)

Abstract

A device for use in water drains provided with an outer drain grating for preventing accidents and coarse material falling into the drain. The device is intended for separating and collecting particulate impurities, such as sand, wooden pegs and leaves, and also oil and other liquid impurities passing through the grating. To this end, the device includes a holder ring (1) intended to be mounted under the drain grating (12), and carrying the combination of a coarse-filtering and protecting means (2) and a fine-filtering means (3). The coarse-filtering and protecting means is cup-shaped and arranged in the holder ring (1), while the fine-filtering means comprises a filter bag (3) of a flexible and water-permeable cloth or fabric material arranged around the holder ring. The holder ring (1) is preferably funnel-shaped and provided with a mounting flange (6) arranged to be firmly clamped beneath the drain grating, and the coarse-filtering and protecting means comprises preferably a wire basket (2).

Description

A filtering and collecting device for water drains
Technical field The present invention relates to water drains of the kind provided with an outer drain grating which acts as a drain cover to prevent accidents and as a means for preventing coarse material from passing down into the drain, and more particularly to a device for use in such drains to separate and collect particulate impurities, such as sand, wooden pegs .and leaves, and. also liquid impurities, such as oil, passing through the' grating.
Background art A large number of devices for collecting particu¬ late material falling down into water drains are known to the art. These devices normally comprise a specially designed grating support combined with a collecting vessel, often provided with a waterseal or drain trap. Such devices, however, normally require the drains to be- adapted to the system in question* from the very beginning, Consequently, it is difficult to provide existing systems with collecting and separating devices without incurring significant costs. A further disadvantage with known filtering and collecting devices of the aforementioned kind is that they cannot readily be used in drains where the grating -is offset relative to the lower part of the drain. Moreover, the .capacity and/or efficiency of such devices is, or are, at times sadly lacking, the former defficiency resulting in flooding and the latter deff.i- ciency enabling contaminants to enter the drains, which contaminants must be flushed away or sucked out at given intervals of time. Neither are the known devices effective in separating oil or other liquid impurities from the drain water passing through the grating. In addition, these known devices are difficult to empty, and the work of emptying the devices is unhygienic. The purchase price of the known devices is often relatively high, as is also the cost incurred when changing the collecting vessels.
Objects of the invention
The main object of the present invention is to provide a simple and effective separating and collecting device which can be manufactured and mounted in position at low costs and used in drains of widely varying design, thereby eliminating the aforementioned dis¬ advantages. In addition to filtering out particulate material, the device shall also be capable of filtering out oil and other liquid impurities to a certain extent.
Summary of the-invention
The aforementioned objects are achieved in accordance with the invention by providing a device of the aforementioned- kind with two separation stages, of which the last stage is a fine-filtering stage utilizing a water-permeable cloth.
The device according to the invention is particularly characterized in that it comprises a holder ring intended to be mounted beneath the drain grating, said holder ring carrying a combination of at coarse- filtering and protecting means and a fine-filtering means; that the coarse-filtering and the protecting means is cup shaped and arranged in the holder ring; and that the fine-filtering means comprises a filter bag made of a flexible and water-permeable cloth or fabric material and arranged around the holder ring.
Such a filtering and collecting device is of extremely simple construction, it is also cheap to manufacture and can readily be stored and mounted in position, in addition to which the use of a flexible bag enables the device to be installed in different kinds of known drainage systems, irrespective of whether the grating is centred relative to the remainder of the drain or not. The use of a filtering fabric material also enables the device to be used for separating oil and other viscous liquid impurities from the drainage water.
Since the impurities are separated in two stages when using a device constructed in accordance with the invention, said two stages being additional to the separation of. coarse particulate material by the drain grating, it is possible to combine effective separation and collection with an effective through flow of the drainage water. Coarse particles, such as gravel, leaves and the like, are captured in the first separating stage and consequently do not impair the permeability of the relatively fine-mesh filtering bag, which - as afore¬ mentioned - can be adapted to permit oil and other liquid impurities to be filtered off. For example, if leaves were permitted to freely enter the bag, the bag would rapidly become blocked. Consequently, it is important when using a filtering bag, the use of which is to great advantage per se, to combine the bag with an effective preseparating means, which shall also be capable of protecting the bag so as to prevent the same, for example, from being torn by wooden pegs or other sharp contaminants which could otherwise enter the bag. According to one preferred embodiment of the invention, the holder ring is funnel-shaped and provided with a mounting flange arranged to be clamped firmly under the drain grating, and the filtering bag is suspended from the outer surface of the holder ring. In this embodiment the means for filtering coarse material
OMPI and for protecting the bag has the form of a wire basket so constructed as to form a gap between said means and the surrounding holder.ring. This enables maximum use of the volumetric capacity of the basket. The height or thickness of the holder ring should be less than half the height of a grating-support means carrying said drain grating, to enable the device according to the invention to be readily mounted also in drains in which said grating-support means is not centred. In a preferred embodiment of the filtering bag, the bag is openable at its lower end, thereby enabling the bag to be readily emptied in a hygienic manner, and also enabling the bag volume to be adapted to existing requirements. Further, the filtering bag is suitably provided adjacent its upper end with overflow openings, to provide increased flow possibilities when so required, for example in the case of heavy* downpours.
Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings.
Brief description of the drawings
Figure 1 illustrates schematically the components forming a device according to the invention. Figure 2 illustrates a -device according to the invention mounted in'a water .drain.
Figure 3 is a. partly cut-away perspective view of a modified embodiment of a device according to the invention.
Description of a preferred embodiment of the invention
The device illustrated in Figure 1 includes a funnel-shaped holder ring 1, which serves firstly to hold the coarse-filtering means, said means having the form of a wire basket 2 which can be inserted in the
Figure imgf000007_0001
the through-flow capacity of the bag when required, for example in the case of heavy downpours. The tapes 9 also enable the volumetric capacity of the bag to be adjusted in dependence upon existing requirements, and also enable the bag to be emptied in a hygienic fashion without requiring the bag to be turned upside down. In this regard, the bag is simply lifted by the handle 5 and the tapes 9 loosened, whereupon the contents of the bag will fall into a container intended therefor.
As beforementioned, the combination of" ire basket and filter bag is greatly advantagous, since in this way it is possible to combine effective separation of contaminating materials, including liquid impurities such as oil and the like, with an effective through-flow of the drainage water. The wire basket 2, however, does not only serve as a coarse—filtering means, but also to protect the bag from intentional or unintentional damage, e.g. by means of sticks inserted into the drain through the grating.
Figure 2 illustrates schematically the manner in which the device according to the invention is mounted in a water drain. The reference 11 identifies the grating-support means which carries a drain grating 12, -under which the mounting flange 6 of the holder ring 1 is firmly pressed. In the illustrated embodiment, the grating-support means 11 res'ts on a number of adjustment rings 14 and is not centred relative to the lower part 13 of the drain. Such lateral displacement of the grating-support, means is quite common, for example in drains located in street gutters, and can in practice be much greater than that illustrated in the drawing. With drains of this kind it is necessary for the collecting means to have the form of a flexible bag, since otherwise a means of special design must be manufactured. To enable a device according to the invention to be installed in drains irrespective of the magnitude by which. the grating-support means is displaced relative to the bottom portion of the drain, the height or- thichness of the holder ring 1 shall be smaller than the height or depth of the grating-support means 11, and preferably not more than about half the height or depth of said grating-support means.
Figure 3 illustrates a device according to the invention for use in a drain in which the grating is accommodated in a rectangular opening. The device, however, has the same design as the design illustrated in Figures 1 and 2, and hence no additional description of this embodiment is required. The "references used in Figure 3 identify the same elements as the references previously used.
The device according to the invention thus comprises only three parts, which can be manufactured at low costs. . By using a flexible bag, the device requires. the minimum of space for storing and transporting the same. That part of the device which is subjected to the most wear is the bag, which can be replaced with a new bag at relatively low cost when necessary. The use of a bag according to the invention also prevents water from collecting, such water collections being prone to freeze in cold weather and generating unpleasant odours in dry periods. By providing the bag and the holder ring with uniformly spaced attachment means, the bag can be mounted in any position of rotation whatsoever. A bag also provides a very large filtering area, which can be adjusted as required.
A device according to the invention can be modified in several respects within the scope of the Claims. Thus, its geometric shape can be adjusted to the drain in which it is to be mounted. The coarse-filtering means may, in addition to a wire basket, also comprise another cup- shaped container having good permeability. An essential feature of the device according to the invention, however, is that it comprises two separating stages, of which the last stage includes a flexible cloth or fabric material to provide a fine filtering effect, while the first stage serves to separate coarse material from the drainage water and to protect the bag.

Claims

Claims
1. A device for use in water drains provided with an outer drain grating intended to prevent accidents and to prevent coarse material falling into the drain, for separating and collecting particulate impurities, such as sand, wooden pegs and leaves, and also oil and other liquid impurities passing through the grating, characterized in that said device includes a holder ring (1) intended to be mounted beneath the drain grating (12) , said holder ring carrying a combination of a coarse-filtering and protecting means (2) and a fine-filtering means (3) ; that the coarse-filtering and protecting means is cup-shaped and arranged in the holder ring (1).; and that the fine-filtering means comprises a filtering bag (3) made of a flexible and water-permeable cloth or fabric material and arranged around said holder ring.
2. A device according to claim 1, characterized in that the holder ring (1) is funnel-shaped and provided with a mounting flange (6) arranged to be firmly clamped beneath the drain grating (12) ; and that the filter bag (3) is suspended from the outer surface of the holder ring. - -
3. A device according to claims 1 or 2, characterized in that the coarse-filtering and' protecting means comprises a wire basket (2) .
4. A device according to claim 3, characterized in that the wire basket (2) is so constructed that it forms a gap between said basket and the surrounding holder ring (1) .
5. A device according to any of claims 1-4, characterized in that the height of the holder ring (1) is less than the height of a grating-support (12) means carrying said drain grating (11) , preferably less than half the height of said grating-support.
6. A device according to any of claims 1-5, characterized in that the filter bag (3) is openable at its lower end.
7. A device according to any of claims 1-6, characterized in that the filter bag (3) is provided at its upper end with overflow openings (10) .
8. A device according to any of claims 1-7, characterized in that the-holder ring (1) is provided with a lower transverse handle (5) , which can also serve as a support for the coarse-*-filtering and protecting means (2) .
PCT/SE1982/000300 1981-10-01 1982-09-29 A filtering and collecting device for water drains Ceased WO1983001268A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE8282902998T DE3265440D1 (en) 1981-10-01 1982-09-29 A filtering and collecting device for water drains
AT82902998T ATE14906T1 (en) 1981-10-01 1982-09-29 FILTRATION AND COLLECTION DEVICE FOR SEWAGE CANALS.
DK2361/83A DK236183D0 (en) 1981-10-01 1983-05-25 DRAINING FILTERING AND COLLECTION DEVICE
FI834003A FI834003A7 (en) 1981-10-01 1983-11-01 FILTERINGS- OCH UPPSAMLINGSANORDNING FOER VATTENAVLOPP

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8105804A SE427680B (en) 1981-10-01 1981-10-01 DEPARTMENT FOR SEPARATION AND COLLECTION OF POLLUTANTS AT DAYWATER TOWNS
SE8105804-2811001 1981-10-01

Publications (1)

Publication Number Publication Date
WO1983001268A1 true WO1983001268A1 (en) 1983-04-14

Family

ID=20344678

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1982/000300 Ceased WO1983001268A1 (en) 1981-10-01 1982-09-29 A filtering and collecting device for water drains

Country Status (11)

Country Link
US (1) US4419232A (en)
EP (1) EP0102355B1 (en)
JP (1) JPS58501591A (en)
CA (1) CA1176993A (en)
DE (1) DE3265440D1 (en)
DK (1) DK236183D0 (en)
FI (1) FI834003A7 (en)
IE (1) IE53504B1 (en)
NO (1) NO152224B (en)
SE (1) SE427680B (en)
WO (1) WO1983001268A1 (en)

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FI834003A0 (en) 1983-11-01
DE3265440D1 (en) 1985-09-19
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IE822359L (en) 1983-04-01
FI834003A7 (en) 1983-11-01
US4419232A (en) 1983-12-06
EP0102355A1 (en) 1984-03-14
JPS58501591A (en) 1983-09-22
IE53504B1 (en) 1988-11-23
NO831895L (en) 1983-05-27
DK236183D0 (en) 1983-05-25
NO152224B (en) 1985-05-13
SE427680B (en) 1983-04-25
SE8105804L (en) 1983-04-02
EP0102355B1 (en) 1985-08-14
CA1176993A (en) 1984-10-30

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