WO1998057089A1 - Raccord de tuyaux - Google Patents

Raccord de tuyaux Download PDF

Info

Publication number
WO1998057089A1
WO1998057089A1 PCT/NL1998/000323 NL9800323W WO9857089A1 WO 1998057089 A1 WO1998057089 A1 WO 1998057089A1 NL 9800323 W NL9800323 W NL 9800323W WO 9857089 A1 WO9857089 A1 WO 9857089A1
Authority
WO
WIPO (PCT)
Prior art keywords
sealing elements
pipe
pipe joint
medium
resilient sealing
Prior art date
Application number
PCT/NL1998/000323
Other languages
English (en)
Inventor
Gjalt Martinus Gaikema
Original Assignee
Wavin B.V.
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 Wavin B.V. filed Critical Wavin B.V.
Priority to AU80396/98A priority Critical patent/AU8039698A/en
Publication of WO1998057089A1 publication Critical patent/WO1998057089A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L23/00—Flanged joints
    • F16L23/16—Flanged joints characterised by the sealing means
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/08—Casing joints
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L21/00—Joints with sleeve or socket
    • F16L21/02—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings
    • F16L21/035—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings placed around the spigot end before connection

Definitions

  • the invention relates to a pipe joint for connecting in a sealed manner two pipe parts of a line for transporting a first medium through surroundings containing a second medium, comprising two resilient sealing elements which lie at a distance apart.
  • a pipe joint of this kind is known from US-A- 3,990,730.
  • This patent shows a pipe joint which connects a pipe part having a spigot and a pipe part having a socket to one another in a sealed manner.
  • Two grooves are arranged inside the socket, which grooves lie at a distance from one another in the axial direction and hold two flexible sealing elements.
  • joints of this kind have the advantage over the conventional pipes having only one sealing element that it is less easy for one medium to contaminate the other through the pipe joint itself.
  • this sealing element will over a more or less short period of time become contaminated with the said medium and will then release the said medium to the other medium.
  • the object of the present invention is to provide a pipe joint which is permeation-tight and eliminates the abovementioned disadvantages.
  • this object is achieved by the fact that the two resilient sealing elements consist of chemically different materials, each material being suitable for use with the medium with which it comes into contact, and by the fact that the two resilient sealing elements are separated from one another by a permeation- or diffusion-inhibiting layer.
  • the use of two sealing elements which are made from different materials and, moreover, are separated from one another by a permeation- or diffusion- inhibiting layer reduces contamination of one medium by the other to a sufficient extent to ensure that there are no longer any problems.
  • the result is a simple and inexpensive pipe joint which is suitable for use in permeation-tight pipes .
  • Examples of such pipes which per se do not allow any permeation of media are: metal pipes, such as steel, cast iron and aluminium, and also vitrified clay pipes, and plastic pipes with a metal intermediate layer, such as PEX (crosslinked polyethylene) with a small layer of aluminium.
  • metal pipes such as steel, cast iron and aluminium
  • plastic pipes with a metal intermediate layer such as PEX (crosslinked polyethylene) with a small layer of aluminium.
  • PEX crosslinked polyethylene
  • US-A-4 153 261 discloses a pipe joint comprising two ring shaped elements consisting of chemically different materials. However, only one of the two elements is resilient and has a sealing function.
  • the other element is a polyurethane foam body having an alkaline substance suspended therein.
  • the foam body does not have a sealing function, but is merely there for the protection of exposed metal surfaces of the pipe joint. The protection arises due to hydration of the alkaline substance by surrounding water, which releases the alkaline substance over a period of time from the polyurethane foam. For a proper functioning it is important that the foam body is somewhat permeable to water in order for the alkaline substance to react with the water.
  • the permeation- or diffusion- inhibiting layer according to the invention is formed by a layer of air or layer of metal accommodated between the two sealing elements.
  • the stationary layer of air will delay the diffusion of a contaminating medium out of one of the sealing elements to a sufficient extent, so that the contaminating medium will scarcely diffuse into the following sealing element.
  • the layer of metal will ensure that no movement whatsoever of the undesirable medium is to be expected any longer.
  • the invention also relates to particularly advantageous uses of the pipe joint according to the invention as laid down in claims 8 and 9.
  • the different materials for the resilient sealing elements are chosen such that the inner one is suitable for clean fluid (for example drinking water) and the outer one for contaminated earth (depending on the type of contamination of the earth) , or that the inner one is suitable for contaminated fluid (for example sewage water) and the outer one for clean earth.
  • the combination of these two different materials for the two resilient sealing elements in combination with the permeation - or diffusion-inhibiting layer ensures for quite a long time, up to 50 years, that no mixture of clean fluids with contaminated fluids takes place. This is important because environmental contamination is becoming more and more of an issue in todays society.
  • Fig. 1 shows a first embodiment of the pipe joint according to the invention
  • Fig. 2 shows a second embodiment of the pipe joint according to the invention.
  • a socket of a first pipe part 10 and a spigot of a second pipe part 11 have been pushed into one another.
  • the resilient sealing elements 16, 17 are both formed by sealing rings.
  • the sleeve-like aluminium element 19 between the two sealing elements 16, 17 may also be omitted, so that instead a stationary layer of air is present between the two sealing elements 16, 17.
  • the line formed by the two connected pipe parts 10, 11 is used for transporting a first medium 21 through surroundings containing a second medium 22.
  • the pipe parts of the pipe line according to the invention are preferably made of plastic, but can also be made of steel, cast iron, etc. Permeation of one medium to the other medium through the walls of the pipe parts 10, 11 and through the pipe joint is undesirable.
  • the two resilient sealing elements 16, 17 are made from chemically different materials, which are each suitable for use with the medium with which they come into contact. For example, if the first medium 21 is drinking water and the second medium 22 is contaminated earth, the resilient sealing element 16 which comes into contact with the drinking water may consist of a material which is suitable and approved for drinking water, such as for example permitted EPD , SBR or NBR.
  • the resilient sealing element 17 which comes into contact with the contaminated earth 22 may, for example, consist of fluororubber, such as Viton ® , for the case of aromatic compounds present in the ground, of NBR for the case of chlorinated hydrocarbons present in the ground, or of chloroprene for oils and fats which are contaminating the ground.
  • fluororubber such as Viton ®
  • NBR for the case of chlorinated hydrocarbons present in the ground
  • chloroprene for oils and fats which are contaminating the ground.
  • NR natural rubber; IR isoprene rubber;
  • the action of the pipe joint can be explained as follows.
  • the sealing element 17 which comes into contact with the contaminating agent in the second medium 22 becomes saturated with this agent over the period of time, even though the sealing element 17 is resistant per se to the contaminating agent .
  • the contaminating agent will then seek to diffuse out of the sealing element 17 on the side facing away from the contaminating medium 22. However, it has to do this in a space in which the aluminium element 19 or the stationary layer of air is present.
  • This strongly inhibiting action of the pipe joint according to the invention is important not only for drinking water lines in contaminated earth, but may also be employed for example for industrial sewers through which water containing chemicals is transported. In that case, the chemicals must not pass into the surrounding uncontami- nated earth.
  • the distance between the two resilient sealing elements is at least 20 mm. A good functioning of the permeation- or diffusion-inhibiting layer is thus obtained. This minimum distance is of particular importance for the embodiment with the stationary layer of air between the two sealing elements.
  • the layer of metal is preferably sealed of from both the fluid flowing inside the pipe line and the environment in which the pipe line is placed. Thus it is obtained that the metal layer will not be affected by the fluid or the environment.
  • the pipe lines are laid underground they preferably have some flexibility in order to be able to follow settings of the ground.
  • the pipe joints preferably have some flexibility. According to the invention this is obtained by the two resilient sealing elements which keep their flexibility during use and lie at some distance apart, thus giving the pipe parts on both sides of the pipe joint the possibility to move a little bit in relation to one another while remaining their sealing function.
  • Fig. 2 shows an embodiment of a pipe joint according to the invention in which two pipe parts 30, 31 are both provided with a flange part extending in the radial direction.
  • the two flange parts may, for example, be bolted together.
  • Two grooves 34, 35 and 34', 35', respectively, which lie at a distance from one another in the radial direction, are arranged in the two mutually facing sides of the flange parts.
  • Two resilient sealing elements 36, 37 are accommodated in the two grooves 34, 35.
  • the space between the two sealing elements 36, 37 and the inner sides of the two flange parts is filled up by a metal ring 39.
  • the function of this embodiment of the pipe joint is identical to that of Fig. 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Physics & Mathematics (AREA)
  • Joints With Sleeves (AREA)
  • Sewage (AREA)

Abstract

La présente invention se rapporte à un raccord de tuyaux permettant de relier de manière étanche deux parties tubulaires (10, 11) d'un conduit destiné à transporter un premier milieu (2) à travers une région environnante renfermant un second milieu (22). Ledit raccord comprend deux éléments d'étanchéité élastiques (16, 17) espacés, séparés l'un de l'autre par une couche inhibant la perméabilité ou la diffusion (19), et constitués de matériaux chimiquement différents, chaque matériau convenant à l'utilisation avec le milieu (21, 22) avec lequel il est en contact.
PCT/NL1998/000323 1997-06-13 1998-06-03 Raccord de tuyaux WO1998057089A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU80396/98A AU8039698A (en) 1997-06-13 1998-06-03 Pipe joint

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1006313A NL1006313C2 (nl) 1997-06-13 1997-06-13 Buisverbinding.
NL1006313 1997-06-13

Publications (1)

Publication Number Publication Date
WO1998057089A1 true WO1998057089A1 (fr) 1998-12-17

Family

ID=19765163

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1998/000323 WO1998057089A1 (fr) 1997-06-13 1998-06-03 Raccord de tuyaux

Country Status (3)

Country Link
AU (1) AU8039698A (fr)
NL (1) NL1006313C2 (fr)
WO (1) WO1998057089A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1106891A2 (fr) * 1999-12-11 2001-06-13 Gebr. Möck GmbH & Co. KG Raccord de tuyaux
EP1544529A1 (fr) * 2003-12-19 2005-06-22 Valeo Climatisation Structure d'étanchéité
FR2924193A1 (fr) * 2007-11-28 2009-05-29 Peugeot Citroen Automobiles Sa Raccord etanche et procede de montage d'un tel reccord
FR2930012A1 (fr) * 2008-04-11 2009-10-16 Saint Gobain Pam Sa Jonction tubulaire.
CN103453249A (zh) * 2012-06-05 2013-12-18 李玉波 F型承插式橡胶圈柔性连接方法及其结构
CN105710157A (zh) * 2016-04-01 2016-06-29 天津市科建防腐保温工程有限公司 一种可承插连接的钢塑复合防腐钢管

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014010899A1 (de) 2014-07-24 2016-01-28 Wabco Gmbh Drehbare axial sichernde und druckfeste Leitungsverbindung

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1473169A (fr) * 1966-01-19 1967-03-17 Raccord perfectionné
CH468586A (de) * 1967-07-12 1969-02-15 Buderus Eisenwerk Einsteck-Muffenrohrverbindung
US4153261A (en) * 1977-04-25 1979-05-08 Interpace Corporation Polyurethane foam body with alkaline substance suspended therein for protecting pipe joints of small-diameter pipes
FR2461174A1 (fr) * 1979-07-13 1981-01-30 Joint Francais Joint d'etancheite annulaire
US4441725A (en) * 1982-04-09 1984-04-10 Thornhill Craver Company Quad bolt
WO1994009295A1 (fr) * 1992-10-14 1994-04-28 Corrosion Control Corp. D/B/A Pikotek Joint protecteur destine a etre utilise dans des conduites d'ecoulement de fluide, et procede associe
EP0750149A1 (fr) * 1995-06-20 1996-12-27 Georg Prinzing GmbH & Co. KG Betonformen- und Maschinenfabrik Elément pour un raccord à manchon

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1473169A (fr) * 1966-01-19 1967-03-17 Raccord perfectionné
CH468586A (de) * 1967-07-12 1969-02-15 Buderus Eisenwerk Einsteck-Muffenrohrverbindung
US4153261A (en) * 1977-04-25 1979-05-08 Interpace Corporation Polyurethane foam body with alkaline substance suspended therein for protecting pipe joints of small-diameter pipes
FR2461174A1 (fr) * 1979-07-13 1981-01-30 Joint Francais Joint d'etancheite annulaire
US4441725A (en) * 1982-04-09 1984-04-10 Thornhill Craver Company Quad bolt
WO1994009295A1 (fr) * 1992-10-14 1994-04-28 Corrosion Control Corp. D/B/A Pikotek Joint protecteur destine a etre utilise dans des conduites d'ecoulement de fluide, et procede associe
EP0750149A1 (fr) * 1995-06-20 1996-12-27 Georg Prinzing GmbH & Co. KG Betonformen- und Maschinenfabrik Elément pour un raccord à manchon

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1106891A2 (fr) * 1999-12-11 2001-06-13 Gebr. Möck GmbH & Co. KG Raccord de tuyaux
EP1106891A3 (fr) * 1999-12-11 2002-11-20 Gebr. Möck GmbH & Co. KG Raccord de tuyaux
EP1544529A1 (fr) * 2003-12-19 2005-06-22 Valeo Climatisation Structure d'étanchéité
FR2924193A1 (fr) * 2007-11-28 2009-05-29 Peugeot Citroen Automobiles Sa Raccord etanche et procede de montage d'un tel reccord
FR2930012A1 (fr) * 2008-04-11 2009-10-16 Saint Gobain Pam Sa Jonction tubulaire.
CN103453249A (zh) * 2012-06-05 2013-12-18 李玉波 F型承插式橡胶圈柔性连接方法及其结构
CN105710157A (zh) * 2016-04-01 2016-06-29 天津市科建防腐保温工程有限公司 一种可承插连接的钢塑复合防腐钢管

Also Published As

Publication number Publication date
NL1006313C2 (nl) 1998-12-15
AU8039698A (en) 1998-12-30

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