EP0883771A1 - Raccord de tuyaux - Google Patents

Raccord de tuyaux

Info

Publication number
EP0883771A1
EP0883771A1 EP97917999A EP97917999A EP0883771A1 EP 0883771 A1 EP0883771 A1 EP 0883771A1 EP 97917999 A EP97917999 A EP 97917999A EP 97917999 A EP97917999 A EP 97917999A EP 0883771 A1 EP0883771 A1 EP 0883771A1
Authority
EP
European Patent Office
Prior art keywords
fitting
pipe
pipe connection
seal
connection according
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Withdrawn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
EP97917999A
Other languages
German (de)
English (en)
Inventor
Rolf Diederichs
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.)
Mapress GmbH and Co KG
Original Assignee
Mannesmann AG
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 Mannesmann AG filed Critical Mannesmann AG
Publication of EP0883771A1 publication Critical patent/EP0883771A1/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Withdrawn legal-status Critical Current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
    • F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/14—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
    • F16L13/141—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling by crimping or rolling from the outside
    • F16L13/142—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling by crimping or rolling from the outside with a sealing element inserted into the female part before crimping or rolling
    • 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
    • F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/14—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
    • F16L13/16—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling the pipe joint consisting of overlapping extremities having mutually co-operating collars
    • F16L13/161—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling the pipe joint consisting of overlapping extremities having mutually co-operating collars the pipe or collar being deformed by crimping or rolling
    • 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
    • F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/10—Adhesive or cemented joints
    • F16L13/103—Adhesive 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
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
    • F16L58/04—Coatings characterised by the materials used
    • F16L58/10—Coatings characterised by the materials used by rubber or plastics
    • F16L58/1054—Coatings characterised by the materials used by rubber or plastics the coating being placed outside the pipe
    • 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
    • Y10S285/00—Pipe joints or couplings
    • Y10S285/915—Mastic

Definitions

  • the invention relates to a pipe connection according to the preamble of the main claim.
  • a so-called composite pipe is pushed onto a gunmetal fitting, the composite pipe consisting of an inner pipe that transports the liquid with an aluminum jacket and an overlying casing pipe that takes over the external protection.
  • Inner tube and cladding tube are made of plastic.
  • the fitting has a region extending in the longitudinal direction, which is provided with a stop, up to which the pipe to be connected is pushed on.
  • the area adjacent to the stop has two inner grooves, in each of which a sealing ring is arranged.
  • the rest of the section is heavily contoured so that the tube that is slid on can be molded into the contour during pressing.
  • the cuff has a radially inwardly extending web, which serves as a stop for the inserted tubes.
  • the end areas of the fitting are flanged inwards.
  • two spaced apart from the fitting Beads are formed in such a way that the inserted tube is pressed in in this area.
  • the disadvantage of this system is that the press jaw takes up a lot of space, so that pressing in narrow areas becomes impossible.
  • an extension is required for the majority of the fittings, especially for T-pieces, so that the pressing tongs can be attached.
  • connection for line pipes can be removed, consisting of a fitting having a socket on which a protective sleeve covering the socket is detachably arranged at a radial distance from the socket and a composite pipe, the end region of which with radial plastic deformation with the one sealing ring having connecting piece is connectable.
  • the protective sleeve is separated from the fitting and pushed back onto the pipe to such an extent that the end of the composite pipe can be radially pressed with a pressing pliers under deformation.
  • the protective sleeve After pressing and removing the crimping pliers, the protective sleeve is connected to the fitting as originally, so that the deformed area of the composite pipe is not visible from the outside, the pushed-on protective sleeve also forming a kink protection.
  • This line connection is very expensive to manufacture, since the socket of the fitting must be specially designed in order to secure and seal the composite pipe pressed thereon sufficiently.
  • the sealing point is so far removed from the end face of the socket of the fitting that a gap formation between the outer surface of the socket and the inner surface of the lifted composite pipe is not excluded.
  • a differently designed conduit connection is disclosed in DE-GM 74 06 802. This consists of a coupling ring made of thermoplastic plastic for connecting butt-jointed tube ends with outside reinforcements such as ribs, beads or the like.
  • Coupling ring has a circumferential bead which engages in the gap of the butt abutting pipe ends and ring surfaces which conically decrease in the outer diameter towards the coupling ring ends.
  • the coupling ring can be inserted into the pipe ends and can be firmly attached by gluing, preferably using a two-component adhesive.
  • This pipe connection has the Disadvantage that the pipes to be connected must be provided with external reinforcements to ensure the required rigidity of the connection.
  • the coupling ring must be provided with conical ring surfaces in order to ensure perfect bonding.
  • the object of the invention is to provide a pipe connection of the generic type, which consists of simple to produce elements, which is suitable for higher pressures and temperatures and in which the risk of gap formation is excluded.
  • An advantage of the pipe connection according to the invention is that the required positioning of the pushed-on pipe on the fitting can be recognized directly visually without any additional aids.
  • the metallic press connection which has been tried and tested for years by deforming the pipe and fitting, is retained, so that high axial
  • Area lying seal is also detected by the deformation. In this way, the formation of a gap between the outer surface of the fitting and the inner surface of the pushed-on pipe is prevented.
  • the stop is designed as a roof-like or flange-like bead to z. B. with presses or lathes in a simple manner.
  • the seal is preferably made of elastomer, e.g. B. butyl rubber, EPDM, fluororubber, etc. manufactured. Depending on the intended use, other sealing materials can also be used, especially with regard to higher temperatures and aggressive media to be transported.
  • a range of 0.5 to 10 mm is selected for the thickness of the seal, depending on the pipe diameter.
  • the end region of the fitting, including the stop can be pressed from a pipe section or can be made from solid material by turning or extrusion.
  • This basic element can be connected to an elbow, T-piece or threaded part by welding. As a special case, the stop can even be omitted if the element to be connected z. B. threaded part itself has a stop.
  • Another possibility of achieving the object is characterized in that a hardening adhesive is applied in the contact area between the outer surface of the fitting and the inner surface of the pushed-on pipe. This creates a cohesive connection that both the
  • a special adhesive e.g. used a two-component adhesive based on epoxy resin.
  • the advantage of this connection technology can be seen in the fact that no press tool is required at low line pressures.
  • the wall thicknesses for pipe and fitting can be selected to be very small, since they are not designed with regard to the pressing, but only have to withstand the internal pressure.
  • the thin wall of the fitting also has the advantage that the inner diameter of the line is only slightly reduced. If higher line pressures are required, this pipe connection can also be mechanically pressed for gluing.
  • the proposed system Compared to the glued pipe connections in fittings and pipes made of plastic, the proposed system has the advantage that the area of application is considerably larger with regard to temperature and internal pressure.
  • FIG. 1 shows a longitudinal section through a first embodiment of the pipe connection according to the invention FIG. 2 as FIG. 1, but a variant of the first embodiment
  • a first embodiment of the pipe connection according to the invention is shown in a longitudinal section, wherein the state before and in the right half the state after the pressing can be seen in the left half of the figure.
  • the core of the connection is a fitting 1 made of plastically deformable metal, which has a stop 2 extending radially outwards. This is followed at least on one side by a longitudinally extending cylindrical section 3, 3 '.
  • two smooth-ended conduit pipes 4, 4 'made of plastically deformable metal are pushed onto the fitting 1, namely up to the stop 2.
  • a seal 5,5 ' is arranged in the contact area between the fitting 1 and the conduit pipe 4, 4', between the outer surface of the cylindrical section 3, 3 'of the fitting 1 and the inner surface of the pushed-on tube 4,4'.
  • the outer surface of the seal can be 5.5 'with a
  • Figure 2 shows in the same longitudinal section a variant of the embodiment described above, wherein the same reference numerals have been used for the same parts.
  • the respective conduit 4, 4 ' is covered with a plastic jacket 9, 9' in a manner known per se.
  • the exterior outside of the cylindrical section 3, 3 'of the fitting 1 is covered with plastic 8 or coated with plastic paint.
  • Figure 3 has in the same longitudinal section as Figure 1, a further embodiment of the pipe connection according to the invention, wherein the same reference numerals have been used for the same parts.
  • a seal in the contact area between the outer surface of the fitting 1 and the inner surface of the respectively pushed pipe 4, 4 ', not a seal, but e.g. a curable adhesive 10, 10 'is arranged. After curing, this results in a material connection, the adhesive 10, 10 'taking on both the sealing function and the axial securing. Since the forces to be transmitted by such a connection are limited, a bead-like pressing can additionally be formed, as in FIG. 1. The adhesive connection will be sufficient for lower pressure levels, while the additional mechanical axial securing will be preferred for higher pressures and possibly additional vibration stresses on the lines.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

L'invention concerne un raccord de tuyaux, dans un tuyau dont la partie terminale lisse est enfoncée sur une pièce de raccord métallique qui présente au moins une zone en forme de douille s'étendant dans le sens longitudinal et est pourvue d'une butée s'étendant vers l'extérieur dans le sens radial, située au début de la zone en forme de douille. Un élément d'étanchéité est placé entre le tuyau et la pièce de raccord qui sont assemblés de façon permanente au moyen d'un outil de compression appliqué à l'extérieur et déformant plastiquement le tuyau. L'invention vise à créer un raccord de tuyau de ce type, adapté à des pressions et à des températures élevées et pouvant être utilisé dans différents domaines d'application. A cet effet, le tuyau (4, 4') et la pièce de raccord (1) sont réalisés de façon connue dans un métal déformable plastiquement; un élément d'étanchéité (5, 5') est placé dans la zone de contact entre la surface extérieure de la pièce de raccord (1) et la surface intérieure du tuyau enfoncé (4, 4'), ledit élément d'étanchéité s'étendant sur la totalité de cette zone de contact. Cette dernière présente une zone de déformation (7') formant au moins un élément d'arrêt axial de type moulure à l'extrémité de la pièce de raccord, venant en contact avec cette pièce de raccord. La distance entre la zone de déformation (7') et la face de la pièce de raccord (1) est si faible que l'élément d'étanchéité (5') situé dans cette zone vient également en contact avec la déformation.
EP97917999A 1996-02-28 1997-02-19 Raccord de tuyaux Withdrawn EP0883771A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19609257A DE19609257C2 (de) 1996-02-28 1996-02-28 Rohrverbindung
DE19609257 1996-02-28
PCT/DE1997/000365 WO1997032153A1 (fr) 1996-02-28 1997-02-19 Raccord de tuyaux

Publications (1)

Publication Number Publication Date
EP0883771A1 true EP0883771A1 (fr) 1998-12-16

Family

ID=7787780

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97917999A Withdrawn EP0883771A1 (fr) 1996-02-28 1997-02-19 Raccord de tuyaux

Country Status (10)

Country Link
US (1) US6059338A (fr)
EP (1) EP0883771A1 (fr)
JP (1) JP2000505531A (fr)
KR (1) KR19990087281A (fr)
CN (1) CN1212750A (fr)
CA (1) CA2248301A1 (fr)
CZ (1) CZ276298A3 (fr)
DE (1) DE19609257C2 (fr)
PL (1) PL328869A1 (fr)
WO (1) WO1997032153A1 (fr)

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Also Published As

Publication number Publication date
CN1212750A (zh) 1999-03-31
KR19990087281A (ko) 1999-12-27
CZ276298A3 (cs) 1999-03-17
PL328869A1 (en) 1999-03-01
DE19609257C2 (de) 1998-08-20
CA2248301A1 (fr) 1997-09-04
DE19609257A1 (de) 1997-09-04
US6059338A (en) 2000-05-09
WO1997032153A1 (fr) 1997-09-04
JP2000505531A (ja) 2000-05-09

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