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EP2179208A2 - Raccord de tuyauterie - Google Patents

Raccord de tuyauterie

Info

Publication number
EP2179208A2
EP2179208A2 EP08784969A EP08784969A EP2179208A2 EP 2179208 A2 EP2179208 A2 EP 2179208A2 EP 08784969 A EP08784969 A EP 08784969A EP 08784969 A EP08784969 A EP 08784969A EP 2179208 A2 EP2179208 A2 EP 2179208A2
Authority
EP
European Patent Office
Prior art keywords
coupling
plastic layer
fibers
coupling according
wall
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.)
Withdrawn
Application number
EP08784969A
Other languages
German (de)
English (en)
Inventor
Alexander Rinderhofer
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.)
Knoch Kern und Co KG
Original Assignee
Knoch Kern und Co KG
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 Knoch Kern und Co KG filed Critical Knoch Kern und Co KG
Publication of EP2179208A2 publication Critical patent/EP2179208A2/fr
Withdrawn legal-status Critical Current

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
    • 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
    • F16L21/022—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 used with sleeves or nipples for pipes of the same diameter, or with reduction pieces
    • 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
    • F16L37/00—Couplings of the quick-acting type
    • F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
    • F16L37/12—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members using hooks, pawls, or other movable or insertable locking members
    • F16L37/14—Joints secured by inserting between mating surfaces an element, e.g. a piece of wire, a pin, a chain
    • F16L37/142—Joints secured by inserting between mating surfaces an element, e.g. a piece of wire, a pin, a chain where the securing element is inserted tangentially
    • F16L37/148—Joints secured by inserting between mating surfaces an element, e.g. a piece of wire, a pin, a chain where the securing element is inserted tangentially the securing element being flexible
    • 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
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/06—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end
    • F16L47/08—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end with sealing rings arranged between the outer surface of one pipe end and the inner surface of the sleeve or socket, the sealing rings being placed previously in the sleeve or socket

Definitions

  • the invention relates to a pipe coupling, in particular for the connection of water-carrying pipes, such as drinking water pipes, sewage pipes, well pipes, etc.
  • Such a pipe coupling is used to connect two pipes.
  • the pipe coupling must be designed to provide a fluid tight connection of adjacent pipes. It must also have the necessary mechanical stability for the particular application.
  • abutment are provided along pipe systems of several pipes and pipe couplings, in order to avoid as possible Tensile forces act on the pipes. The installation of abutments is not always possible.
  • pipe couplings are required, which allow a tensile strength connection of adjacent pipes.
  • the known pipe couplings consist of a tubular sleeve made of glass fiber reinforced plastic and an inside, rubber-elastic seal with different sealing lips.
  • the invention is therefore an object of the invention to provide a pipe coupling of the generic type, which allows a secure and permanent connection of adjacent pipe sections in zugfester execution.
  • the invention is based on the finding that this goal can be achieved by a special, multi-layered construction of the coupling wall.
  • the basic structure of a pipe coupling is given: An inside seal, which is assembled in an associated (outside) sleeve.
  • the coupling sleeve is manufactured by spin coating.
  • the fiber reinforcement consists of cut glass fibers in irregular orientation.
  • the sleeve is produced in a winding process.
  • the fibers are longer (continuous fibers) and run predominantly in the circumferential direction of the sleeve.
  • the core idea of the invention is to form different layers of the pipe coupling with different fiber orientation.
  • the wall structure of the pipe coupling can basically have any number of layers; According to the invention, at least two layers are important for the solution of the problem:
  • the wall must have a fiber-reinforced outer plastic layer, in which the fibers extend predominantly in the axial direction of the coupling and
  • the wall must have a fiber reinforced inner plastic layer, in which the fibers extend predominantly in the circumferential direction of the coupling.
  • the minimum wall structure is therefore in three parts: outer plastic layer, inner plastic layer, seal. This wall construction is sufficient to achieve the desired goal and to provide a high-quality, high-tensile coupling.
  • the inner plastic layer can be, for example, a layer produced in the winding process. It serves to absorb the internal pressure of the associated piping system.
  • the tangentially (ie in the circumferential direction of the pipe coupling) oriented fibers provide excellent strength of this layer in the circumferential direction.
  • the outer plastic layer with its substantially axially oriented fibers is the critical layer for increasing the axial tensile strength of the coupling. This goal is achieved in a special way when the fibers (threads) have a corresponding length.
  • the outer layer may be formed so that the individual fibers of the reinforcement extend over the entire axial length of the pipe coupling, that is, from one end to the other. With a coupling length of 50 cm, the fibers / threads are then at least 50 cm long, often longer, because they follow the contour of the coupling.
  • the outer plastic layer should have at least 9/10 of the length of the coupling in the axial direction of the coupling in order not to jeopardize the advantageous tensile strength. The best is the outer plastic layer over the entire axial length of the coupling.
  • the inner plastic layer can be shorter. According to one embodiment, it has a maximum of 8/10 of the length of the coupling in the axial direction of the coupling.
  • the outer plastic layer in axial end portions of the coupling may have a wall thickness which corresponds to the wall thickness of the coupling or at least greater than 9/10 of the wall thickness of the coupling in these end portions.
  • the inner plastic layer is overlapped at the end by the outer plastic layer.
  • the seal in turn usually has a length which corresponds in the axial direction of the coupling at most the length of the inner plastic layer. It can also be shorter, so that the inner plastic layer engages over the seal at the axial end portions.
  • the fibers of the inner plastic layer may be so-called endless fibers which run around the coupling tube several times. Again, the longer the fibers, the higher the tensile strength.
  • the seal can be glued to the inner plastic layer. It is also possible to chemically crosslink the seal with the inner plastic layer, as proposed in EP 1 102 943 B1. A mechanical attachment is possible.
  • the seal is in one piece. It can - in the axial direction of the coupling - be formed mirror-inverted, starting from a middle, inwardly projecting sealing ring, against which strike the pipes to be joined on opposite sides.
  • the coupling can also be formed asymmetrically with respect to their seal.
  • This embodiment but also other embodiments of the pipe coupling according to the invention, provide the ability to form the inner wall in the region of its two end portions (viewed in the axial direction of the coupling) with circumferential annular recesses, preferably in-situ during manufacture.
  • These annular recesses serve to receive tension rods, which are threaded through the coupling wall in the connection of two tubes and partly lie in the mentioned annular recess, partly in a corresponding annular recess in the region of the tube ends after assembly, thus creating a tensile and positive connection , This too is exemplified in the following description of the figures.
  • the recesses are formed in the manufacture of the coupling with.
  • the corresponding recesses were milled out as grooves.
  • the fibers were severed and thus the tensile strength and shear strength of the coupling significantly weakened.
  • the fibers can be embedded around the depression and thus continuously in the plastic matrix by the manufacturing method described.
  • the fibers of the outer plastic layer follow, at least in the region of the inner wall, the shape of the inner wall.
  • At least one of the plastic layers consists of a cured, glass fiber reinforced polyester resin, although other plastic systems and fiber types are possible.
  • FIG. 1 shows a perspective partial view of a pipe coupling according to the invention
  • 2 shows a longitudinal section through the coupling of Figure 1 in the assembled state with two pipe sections
  • Figure 3 a longitudinal section through the coupling wall to illustrate the wall structure.
  • FIG. 3 shows an example of a wall structure of the pipe coupling illustrated in FIGS. 1, 2. From outside to inside, ie between an outer wall 12 and an inner wall 14, the wall structure is characterized by three zones:
  • the outer plastic layer 16 has in end portions 1 OEl, 10E2 a wall thickness (wall thickness) D E , which corresponds to the wall thickness D K of the coupling 10 in this end portion.
  • recesses 18E1, 18E2 are furthermore formed on the inside, which have an approximated rectangular profile in section (FIG. 3).
  • the fibers 16F run continuously over the entire axial length L of the pipe coupling 10 and in the region of the groove-like recesses 18E l, 18E2 around it. Due to the continuous fiber flow, the outer plastic layer 16 has an extremely high tensile strength / shear strength (in the axial direction arrow A).
  • the inner plastic layer 20 is shorter (in the axial direction of the coupling 10) than the outer plastic layer 16. It extends between the two inner sections 19E l, 19E2 of the recesses 18El, 18E2.
  • the inner plastic layer 20 is like the outer plastic layer 16 of cured polyester resin.
  • the fibers within the layer 20 consist of glass fibers, which extend in the circumferential direction of the pipe coupling 10 in the layer 20, so that in the sectional view of Figure 3, only the sectional surfaces of the individual fibers 2OF can be seen.
  • the layer 20 is produced in the winding process and, in addition to good compressive strength, has an extremely high tensile strength in the tangential direction (arrow R) of the coupling 10 in order to absorb the internal pipe pressure.
  • the inner plastic layer 20 is formed with projections and recesses, in the corresponding projections and recesses of a seal 22 are.
  • the gasket 22 is made of ethylene-propylene-diene terpolymer (EPDM), a rubber-like rubber-elastic material.
  • the seal 22 has a plurality of inwardly projecting sealing lips 22L. Since the concrete design of the seal for the inventive concept is not essential, will not be discussed here at this point.
  • the seal should preferably be designed so that the medium (water) that flows through the pipe does not get in contact with the coupling material (the sleeve). It is important at most that the seal 22 is in one piece and in the illustrated embodiment symmetrically (mirror-symmetrically) to a plane E - E, which extends through a central web 24 of the seal 22.
  • the plastic layers 16, 20 are chemically crosslinked with each other, since both were applied in the same winding process (wet in wet).
  • FIGs 1, 2 show the coupling 10, which couples two pipe sections 30L, 30R.
  • Both pipe sections 30L, 30R have circumferential grooves 32 on their respective outer walls which, in the coupling position, oppose the annular recesses 18E 1, 18E2 of the coupling 10 so that coupling rods 34 can be threaded through prepared openings 36 in the outer plastic layer 16 they, as shown in the figures, partially eino in the recesses 18E l, 18E2, partially in the grooves 32 and thus create a tensile and positive connection between the coupling 10 and pipes 30L, 30R.
  • the seal 22 overlies the tubes 30L, 30R, the central web 24 of the seal 22 between the ends of the tubes 30L, 30R.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Laminated Bodies (AREA)
  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)

Abstract

La présente invention concerne un raccord de tuyauterie destiné en particulier au raccordement de conduites d'eau telles que des tuyaux d'eau potable, des tuyaux d'eaux usées, des tuyaux de puits, etc.
EP08784969A 2007-08-22 2008-07-23 Raccord de tuyauterie Withdrawn EP2179208A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007039582A DE102007039582A1 (de) 2007-08-22 2007-08-22 Rohrkupplung
PCT/EP2008/006009 WO2009024230A2 (fr) 2007-08-22 2008-07-23 Raccord de tuyauterie

Publications (1)

Publication Number Publication Date
EP2179208A2 true EP2179208A2 (fr) 2010-04-28

Family

ID=40280109

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08784969A Withdrawn EP2179208A2 (fr) 2007-08-22 2008-07-23 Raccord de tuyauterie

Country Status (5)

Country Link
US (1) US20100164221A1 (fr)
EP (1) EP2179208A2 (fr)
DE (1) DE102007039582A1 (fr)
RU (1) RU2433328C1 (fr)
WO (1) WO2009024230A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201217431D0 (en) * 2012-09-28 2012-11-14 Manning John A pipe joint
DE102018101163B4 (de) 2018-01-19 2022-03-31 Röhrenwerk Kupferdreh Carl Hamm GmbH Rohrkupplungssystem

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1896335U (de) * 1964-05-04 1964-07-09 Adolf Dipl Ing Voss Muffe zum verbinden von rohren, insbesondere von betonrohren.
NL172363C (nl) * 1971-12-14 1983-08-16 Wavin Bv Mofbuis.
CH589247A5 (en) * 1975-01-30 1977-06-30 Buchs Metallwerk Ag Sealed jointing sleeve for plastics pipes - has annular seal rings and arched centre with fibreglass reinforcement
CH600228A5 (fr) 1976-10-13 1978-06-15 Hobas Eng Ag
DE2857331A1 (de) * 1977-12-29 1980-12-04 Owens Corning Fiberglass Corp Pipe coupling with pipe registering means
DE8401845U1 (de) * 1984-01-24 1984-04-12 Knoch, Kern & Co, 9010 Klagenfurt Kupplungsmuffe
DE3516814A1 (de) * 1985-05-10 1986-11-13 Rheinische Braunkohlenwerke AG, 5000 Köln Kupplungsmuffe aus kunststoff fuer rohre
US5222769A (en) * 1992-02-26 1993-06-29 Kaempen Charles E Double-wall composite pipe and coupling structure assembly
ATE171534T1 (de) * 1994-07-08 1998-10-15 Hobas Eng Ag Zum verbinden zweier kunststoffrohre dienende muffe
DE19902456A1 (de) * 1999-01-22 2000-08-10 Boerge Carlstroem Verfahren zur Herstellung eines glasfaserverstärkten Kunststoffrohres sowie einer Kupplung
DE19925817C1 (de) 1999-06-07 2000-08-31 Hobas Engineering Gmbh Klagenf Rohrkupplung und Verfahren zu ihrer Herstellung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009024230A2 *

Also Published As

Publication number Publication date
DE102007039582A1 (de) 2009-02-26
US20100164221A1 (en) 2010-07-01
RU2010105005A (ru) 2011-09-27
WO2009024230A3 (fr) 2009-04-09
WO2009024230A2 (fr) 2009-02-26
RU2433328C1 (ru) 2011-11-10

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