EP0204272B1 - An intercepting sewer for conducting waste water down steep gradients - Google Patents

An intercepting sewer for conducting waste water down steep gradients Download PDF

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Publication number
EP0204272B1
EP0204272B1 EP86107361A EP86107361A EP0204272B1 EP 0204272 B1 EP0204272 B1 EP 0204272B1 EP 86107361 A EP86107361 A EP 86107361A EP 86107361 A EP86107361 A EP 86107361A EP 0204272 B1 EP0204272 B1 EP 0204272B1
Authority
EP
European Patent Office
Prior art keywords
waste water
sewer
intercepting sewer
water down
steep gradients
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
EP86107361A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0204272A3 (en
EP0204272A2 (en
Inventor
Alberto Malavasi
Giorgio Iapella
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.)
Costruzioni Montaggi Impianti Speciali Comis Srl
SIMPLAST SpA
Original Assignee
Costruzioni Montaggi Impianti Speciali Comis Srl
SIMPLAST SpA
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 Costruzioni Montaggi Impianti Speciali Comis Srl, SIMPLAST SpA filed Critical Costruzioni Montaggi Impianti Speciali Comis Srl
Priority to AT86107361T priority Critical patent/ATE49254T1/de
Publication of EP0204272A2 publication Critical patent/EP0204272A2/en
Publication of EP0204272A3 publication Critical patent/EP0204272A3/en
Application granted granted Critical
Publication of EP0204272B1 publication Critical patent/EP0204272B1/en
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
    • E03F3/00—Sewer pipe-line systems
    • E03F3/04—Pipes or fittings specially adapted to sewers

Definitions

  • the invention relates to an intercepting sewer for conveying waste water down steep slopes.
  • GB-A-556 707 discloses a drainage or sewerage pipe whose main object is to reduce the fall. This is achieved by means of the retention of pools of liquid or moisture in the pipes after the flow through same has ceased. The pools are obtained by shaping the inner surface of this pipe frusto-conically. Therefore the inner diameter of the pipe gradually changes along its length.
  • WO-A-8 101 736 discloses a plastic pipe whose walls have a uniform thickness along all of its length.
  • the outer surface of the pipe generally has not a cylindrical shape since bulgings alternate with cylindrical portions, as shown in the figures.
  • This particular shape of the pipe aims at reducing the consumption of plastic material and, as a consequence, the weight of the pipe in comparison with conventional pipes.
  • the same amount of liquid substantially flows through the known pipe as it does through a pipe with smooth inner surface.
  • the waste water contains the most heterogeneous suspended materials which, particularly in the case of steep slopes, perform a significant abrasive action on the sewer's inner surface.
  • the flow speed has to be reduced. This is achieved by means of projections provided inside the piping or sewer in the invention. Therefore, the aim of the present invention is completely different, actually the opposite one, with respect to the above documents which aims to not reduce the flow speed.
  • the sewer in the present invention has a substantially better resistance to abrasion in comparison with that of the pipe cited in the WO-A-8 101 736.
  • the main advantage of the present invention is that there is no need for head pits also in the case of steep slopes.
  • fall pits permits the inclination of a pipe line to be reduced, section by section, so as to bring the intercepting sewer to the desired depth whenever this latter would approach too much to a surface level.
  • such an approach leads to significant final design costs and to difficulties in achieving the work, especially when it is to be carried out in a built-up area, since in this case in addition to deeper digging operations involving added charges, there is special works to be taken into account in order to prevent neighbouring edifices from being damaged.
  • the object of the invention is to provide a branch sewer which is so designed that-the flow rate and the slope being the same-it permits the flow velocity to be reduced without having recourse to any head pits and without requiring increased pipe diameter or other provisions which will affect economy of the work.
  • an intercepting sewer for the conveyance of waste water down steep gradients having a smooth outer surface and inner projections, characterized in that a succession of substantially identical circumference projections are provided, said circumferential projections defining a passage having a predetermined diameter and alternating with annular grooves having a substantially uniform diameter.
  • the intercepting sewer in question has a maximum inside diameter of 37 cm and is provided with internal protrusions having a mean distance between the centers of 13.2 cm and a jutting-out thickness of 0.85 cm (thus, minimum diameter of intercepting-sewer at projections, 35.3 cm and mean diameter, 36.15 cm), the intercepting sewer being laid at 10% slope.
EP86107361A 1985-06-05 1986-05-30 An intercepting sewer for conducting waste water down steep gradients Expired - Lifetime EP0204272B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86107361T ATE49254T1 (de) 1985-06-05 1986-05-30 Auffangkanal zum fuehren von abwasser an steilen boeschungen entlang.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2103485 1985-06-05
IT21034/85A IT1184572B (it) 1985-06-05 1985-06-05 Collettore fognario per il convogliamento delle acque reflue attraverso forni pendenze

Publications (3)

Publication Number Publication Date
EP0204272A2 EP0204272A2 (en) 1986-12-10
EP0204272A3 EP0204272A3 (en) 1987-06-10
EP0204272B1 true EP0204272B1 (en) 1990-01-03

Family

ID=11175709

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86107361A Expired - Lifetime EP0204272B1 (en) 1985-06-05 1986-05-30 An intercepting sewer for conducting waste water down steep gradients

Country Status (5)

Country Link
EP (1) EP0204272B1 (es)
AT (1) ATE49254T1 (es)
DE (1) DE3668023D1 (es)
ES (1) ES294598Y (es)
IT (1) IT1184572B (es)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8705880D0 (en) * 1987-03-12 1987-04-15 Score Uk Ltd Pipeline pigs
WO2011163605A2 (en) * 2010-06-24 2011-12-29 Isco Industries, Llc Modified pipe inlet
CN103074933B (zh) * 2012-07-27 2015-12-02 广东联塑科技实业有限公司 一种排水排污槽
JP6382742B2 (ja) * 2015-02-23 2018-08-29 株式会社東芝 自然流下式下水管

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB556707A (en) * 1942-04-07 1943-10-18 Douglas Whitaker Improvements in or relating to drainage and sewerage systems and pipes therefor
GB1264607A (es) * 1970-04-22 1972-02-23
SE7910162L (sv) * 1979-12-10 1981-06-11 Nordstroem Erik G W Av plastmaterial bildat ror med velvningar och anordning for tillverkning av roret
DE3400348C2 (de) * 1984-01-07 1994-03-24 Harzer Betonwarenfabrik Luise Formteil aus Beton, keramischen Massen od. dgl.

Also Published As

Publication number Publication date
EP0204272A3 (en) 1987-06-10
ATE49254T1 (de) 1990-01-15
DE3668023D1 (de) 1990-02-08
EP0204272A2 (en) 1986-12-10
ES294598U (es) 1986-10-16
IT1184572B (it) 1987-10-28
IT8521034A0 (it) 1985-06-05
ES294598Y (es) 1987-07-01

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