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
  • E03F5/06—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
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S210/00—Liquid purification or separation
  • Y10S210/902—Materials removed
  • Y10S210/908—Organic

Definitions

• the present invention relates to a cover for a wastewater shaft, with a manhole cover provided with openings for the wastewater passage, on the underside of which a filter element is arranged which covers the area of the openings.
• the aim of the invention is to provide a cover for a sewage shaft in which this problem is eliminated.
• This goal is achieved with a cover of the type mentioned in the introduction, which is distinguished according to the invention in that the filter element extends into the openings and is essentially flush with the upper side of the top of the manhole cover.
• the special design of the filter element prevents the openings from becoming clogged with dirt particles, and moreover the filter element can be manufactured very easily as a single, coherent part.
• the filter element is composed of at least one base layer and one overlying thin facing layer, which comes to rest entirely in the openings, the free flow cross-section of the layers increasing from layer to layer from top to bottom.
• This type of filter is known per se from AT-PS 400 960 in connection with a floor surface fastening and has an excellent filter effect; Solids contained in the wastewater can only penetrate into the first layer up to a certain grain size; however, once they have penetrated, they do not move the filter element due to the increase in the free flow cross-section in the subsequent layers, but are discharged.
• Any contamination of the wastewater for example oils or petrol, is absorbed to a certain degree by the filter element and regenerated in a biological degradation process which is accelerated by the air volume increasing in the successive layers.
• the porosity of the material simultaneously causes the filter element to be automatically vented.
• the filter element is provided with depressions on its underside.
• the depressions cause an additional increase in the flow cross-section in the lower region of the filter element.
• the filter element can be made of single or multigrain concrete or similar porous materials, e.g. Asphalt mixtures, plastics, etc. are manufactured. It is particularly advantageous if the filter element is made from highly abrasion-resistant porous plastics. Such materials are particularly resistant to alternating loads and vibration stress.
• the filter element is held by a lattice-like support basket attached to the manhole cover, which further improves the structural strength of the cover.
• FIG. 1 is a plan view of the cover of FIG. 1,
• FIG. 3 shows a plan view of an alternative embodiment of the cover according to the invention.
• the cover comprises a rectangular manhole cover 1, e.g. made of metal, which is provided with openings 2 for the passage of waste water.
• the openings 2 can be, for example, grid-shaped (FIG. 2) or strip-shaped ⁇ FIG. 3) be grouped.
• a filter element 3 On the underside of the manhole cover 1 there is a filter element 3, which on its upper side is complementary to the openings 2, engages in these and completely fills them, so that its upper side is essentially flush with the upper side of the manhole cover 1.
• the filter element 3 is held by a grid-like support basket 4, which is attached to the underside of the manhole cover 1.
• the filter element 3 has a multi-layer, in the illustrated case two-layer structure made up of a base layer 5 and an overlying thin cover layer 6, the free flow cross-section of the base layer 5 being larger than that of the cover layer 6.
• the filter element 3 has depressions on its underside 7 provided, the clear width decreases in the direction of the bottom of the depression, so that the flow cross-section of the base layer 5 at the level of the depressions 7 in the downward direction initially increases suddenly and then gradually.
• the filter element 3 or its layers 5, 7 can be made from any water-permeable material, preferably single-grain or multi-grain concrete of different grain size, differently porous asphalt mixtures and in particular highly abrasion-resistant, differently porous plastics.
• the manhole cover 1 can each instead of the rectangular shape shown have any shape, and the number, shape and arrangement of the openings 2 is arbitrary.

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)
• Sewage (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=3482951

Family Applications (1)

Country Status (14)

Families Citing this family (27)

Family Cites Families (14)

• 1996
  • 1996-03-19 AT AT0015396U patent/AT1293U1/de not_active IP Right Cessation
• 1997
  • 1997-03-18 PL PL97329005A patent/PL183555B1/pl unknown
  • 1997-03-18 IL IL12617197A patent/IL126171A0/xx unknown
  • 1997-03-18 WO PCT/AT1997/000057 patent/WO1997035076A1/de not_active Application Discontinuation
  • 1997-03-18 SK SK1289-98A patent/SK128998A3/sk unknown
  • 1997-03-18 CN CN97193191A patent/CN1214096A/zh active Pending
  • 1997-03-18 JP JP9532969A patent/JP2000506576A/ja active Pending
  • 1997-03-18 EP EP97906930A patent/EP0888482A1/de not_active Withdrawn
  • 1997-03-18 AU AU19164/97A patent/AU717709B2/en not_active Ceased
  • 1997-03-18 CZ CZ983000A patent/CZ300098A3/cs unknown
  • 1997-03-18 NZ NZ331898A patent/NZ331898A/en unknown
  • 1997-03-18 US US09/142,787 patent/US5989417A/en not_active Expired - Fee Related
  • 1997-03-18 CA CA002249270A patent/CA2249270A1/en not_active Abandoned
  • 1997-03-18 HU HU9901743A patent/HUP9901743A3/hu unknown

Non-Patent Citations (1)

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