EP1797362A1 - Dispositif de couplage pour realiser une liaison de tubes non amovible permanente - Google Patents

Dispositif de couplage pour realiser une liaison de tubes non amovible permanente

Info

Publication number
EP1797362A1
EP1797362A1 EP04702272A EP04702272A EP1797362A1 EP 1797362 A1 EP1797362 A1 EP 1797362A1 EP 04702272 A EP04702272 A EP 04702272A EP 04702272 A EP04702272 A EP 04702272A EP 1797362 A1 EP1797362 A1 EP 1797362A1
Authority
EP
European Patent Office
Prior art keywords
sleeve
pipe sections
collar
pipe
pressing
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Withdrawn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
EP04702272A
Other languages
German (de)
English (en)
Inventor
Gottfried Haener
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.)
SK tec SA
Original Assignee
SK tec SA
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 SK tec SA filed Critical SK tec SA
Publication of EP1797362A1 publication Critical patent/EP1797362A1/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Withdrawn legal-status Critical Current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
    • F16L13/146—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 an axially moveable sleeve

Definitions

  • Coupling device for producing a permanent, non-detachable pipe connection
  • the invention relates to a coupling device for producing a permanent, non-detachable pipe connection between two pipe pieces with a sleeve comprising the two ends of the pipe pieces.
  • press connection devices are increasingly being used to connect pipe pieces, in which the pipe ends and the connection devices are pressed to form a positive connection by means of cold forming by means of pressings.
  • the object of the invention is to create a device for press-fitting pipe pieces, which is simpler in construction and assembly and which ensures a tight and secure pipe connection.
  • Fig. 1 is a sectional view of a pipe connection device
  • Fig. 2 is a sectional view of an alternative form of pipe connection
  • the pipe connection devices shown in section in the figures each connect two pipes 1, 2 of the same cross-section coaxially to one another.
  • the unpressed state is shown on the left side of FIG. 1, and the compressed final state is shown on the right side.
  • Fig. 2 shows a pressed connection with reinforcing sleeve for thin-walled pipes.
  • the device shown in Fig. 1 consists of a connecting sleeve 3, into which the pipe ends are pushed from both sides and two pressing rings 5 surrounding the sleeve outside.
  • the two pressing rings are the same.
  • the sleeve has an essentially hollow cylindrical shape with a central area 4 and two area 7 adjoining the central area on both sides.
  • the central area 4 of the sleeve has exactly the same inner diameter as the pipe pieces to be connected and is at a distance from the center of the sleeve Formation of a stop 16 for the pipe ends extended to the outside diameter of the pipe ends.
  • the inside diameter of the subsequent areas 7 widens further to the outside.
  • the inner surface of the adjoining areas has an inwardly directed collar 10 and a type of inwardly directed flange 6 at its outer end.
  • the collar 10 and the flange 6 have approximately a width corresponding to the outside diameter of the pipe ends.
  • the outer surface 13 of the sleeve 3 has a relatively large outer diameter of approximately three to five times the tube wall thickness in the central region and has a circumferential groove 14 in the middle for the attachment of a pressing tool for displacing the pressing rings 5.
  • the outer surface has a circumferential bead 8. This bead 8 has a curved cross section.
  • the press ring 5 also has an essentially hollow cylindrical shape with a cylindrical outer wall and a multi-graded inner wall. At the middle of the sleeve, the ring 5 has an inner diameter which is slightly narrower than the outer diameter of the central area 4 of the sleeve 3. As a result, the ring is expanded when pushed onto the central area of the sleeve and additionally secured against axial displacement. In the unpressed state, the press ring 5 has already been pushed a short distance onto the central region 4 of the sleeve 3, so that it is connected to the sleeve in this state by the widening. Since no further deformation has taken place in this state, the pipe ends can be inserted without further ado. Due to the previous connection of the sleeve with the two press rings, these form a unit in contrast to known solutions with a large number of different individual parts.
  • the inner wall of the press ring 5 has two further steps with reduced diameters.
  • a first step 11 has an inner diameter equal to the outer diameter of the adjoining areas 7 of the sleeve 3.
  • a conical area 9 is provided at the transition to this step.
  • a second step is again reduced in diameter and also has a conical transition.
  • connection of pipes is such that a pipe end is inserted into the sleeve 3 as far as the stop 16 from both sides, and then the pressing takes place with a special tool. There is neither a change in dimension, tension or warping during pressing. This has the advantage, this has the advantage that an entire pipeline system can be put together without first being pressed. So any changes can be made before pressing.
  • a further advantage is that the pipes to be connected are centered by the pressing by the present connecting device and are pressed against the conical stop 16 by the enormous axial force, thereby creating a sealing surface 18 and 19 which in turn prevents crevice corrosion.
  • the pressing takes place in that the two pressing rings 5 are pushed towards the middle of the sleeve and first press the bead 8 with the collar 10 and then the flange 6 radially inwards. Because these two phases of pressing take place separately one after the other, the highest pressing pressure is required for deforming the bead 8 and for pressing the collar 10 into the pipe material and not for overcoming accumulated pressing forces from several points and frictional forces. The extending curvature of the bead 8 also results in a favorable pressing pressure profile.
  • the pipe connection according to the invention is not only suitable for seamless, but also for welded pipes in all materials of DIN pipes.
  • Another advantage of the present system is that the distance the press rings have to travel to complete compression is extremely short. As a result, the overall size of the entire connecting device is small. In addition, the press tool can also be constructed accordingly narrower.
  • the present device shows at a glance from the outside whether the pressing has taken place or not.
  • the pressing has taken place when only the groove 14 is visible from the sleeve.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)

Abstract

La présente invention concerne un dispositif de couplage comprenant un corps de base (3) à symétrie de rotation, en forme de manchon, qui reçoit les deux extrémités des tubes (1, 2), et comprend une partie intermédiaire (4) qui présente une butée (16) conique, dirigée vers l'intérieur, qui correspond au diamètre des tubes (1, 2), et des parties (7) adjacentes aux deux côtés de la partie intermédiaire (4), destinées à recevoir les tubes (1, 2). Sa paroi intérieure est dotée d'au moins une nervure (10) dirigée vers l'intérieur, et sa paroi extérieure est dotée d'un renflement (8) incurvé vers l'extérieur par rapport à la nervure. Pour permettre la compression de ce dispositif, celui-ci comprend des anneaux de compression (5) à déplacement axial qui entourent les parties de raccord.
EP04702272A 2004-01-15 2004-01-15 Dispositif de couplage pour realiser une liaison de tubes non amovible permanente Withdrawn EP1797362A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CH2004/000017 WO2005068888A1 (fr) 2004-01-15 2004-01-15 Dispositif de couplage pour realiser une liaison de tubes non amovible permanente

Publications (1)

Publication Number Publication Date
EP1797362A1 true EP1797362A1 (fr) 2007-06-20

Family

ID=34754194

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04702272A Withdrawn EP1797362A1 (fr) 2004-01-15 2004-01-15 Dispositif de couplage pour realiser une liaison de tubes non amovible permanente

Country Status (2)

Country Link
EP (1) EP1797362A1 (fr)
WO (1) WO2005068888A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2015201023B2 (en) * 2012-06-28 2017-05-18 Viega Technology Gmbh & Co. Kg Cheek plate, method for producing a non-detachable pipe joint, fitting and system consisting of a cheek plate and a fitting
DE102012105655A1 (de) * 2012-06-28 2014-01-02 Viega Gmbh & Co. Kg Pressbacke und Verfahren zum Herstellen einer unlösbaren Rohrverbindung und System aus einer Pressbacke und einem Fitting

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5647437B2 (fr) * 1974-08-26 1981-11-10
JPS5857584A (ja) * 1981-10-01 1983-04-05 大和鋼管工業株式会社 管継手
EP1043535A1 (fr) * 1999-03-31 2000-10-11 Haener Machinery Ltd Dispositif de raccordement d'éléments de tuyauterie

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005068888A1 *

Also Published As

Publication number Publication date
WO2005068888A1 (fr) 2005-07-28

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