WO1997031215A1 - Dispositif permettant de produire un raccord de tuyaux - Google Patents

Dispositif permettant de produire un raccord de tuyaux Download PDF

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Publication number
WO1997031215A1
WO1997031215A1 PCT/CH1997/000058 CH9700058W WO9731215A1 WO 1997031215 A1 WO1997031215 A1 WO 1997031215A1 CH 9700058 W CH9700058 W CH 9700058W WO 9731215 A1 WO9731215 A1 WO 9731215A1
Authority
WO
WIPO (PCT)
Prior art keywords
sleeve
rings
pipe
press
ring
Prior art date
Application number
PCT/CH1997/000058
Other languages
German (de)
English (en)
Inventor
Gottfried Haener
Original Assignee
Mefi Management 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 Mefi Management Ag filed Critical Mefi Management Ag
Priority to AU15880/97A priority Critical patent/AU1588097A/en
Publication of WO1997031215A1 publication Critical patent/WO1997031215A1/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
    • 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
    • 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
    • F16L21/08—Joints with sleeve or socket with additional locking means

Definitions

  • the invention relates to a device for connecting pieces of pipe according to the preamble of claim 1.
  • Pipelines are used to transport liquids, vapors, gases, but also solid goods such as grain, concrete or chips. Pipes are usually composed of a large number of pieces of pipe. To form a pipeline, the pipe pieces must be connected to each other.
  • a known possibility is to connect the pipe sections to one another by welding.
  • the problem here is that welding work may only be carried out by certified specialists. Such specialists are not only expensive, they are also increasingly difficult to find.
  • the welded joints have the disadvantage that the weld point has to be reworked on stainless pipes, e.g. by pickling so that the connection does not rust in the area of the weld seam.
  • Connection devices in which the end sections of the two pipe pieces to be connected are connected to one another by pressing are more suitable for use.
  • Such connecting devices have at least one tubular sleeve which is fitted onto or inserted into the pipe end sections to be connected to one another.
  • the sleeves are passed through together with the pipe end sections Zone-wise cold forming into a form-fitting, tight connection.
  • press connections are known on the market, which use sealing rings for sealing.
  • a pipe connection which consists of a single sleeve which is pushed onto the pipe end sections to be connected to one another.
  • the sleeve has an annular circumferential widening at each end, which receives a sealing ring.
  • the press connection device is pressed with a special pressing tool.
  • the sleeve and the tube are deformed in such a way that their cross section has an octagonal shape, as well as a
  • Narrowing diameter assumes.
  • Sealing rings have the disadvantage that they are exposed to high temperatures and chemical aggressive materials such as Acids, alkalis or caustic chemicals are attacked or even destroyed if they come into contact with them. There is also an aging problem. Furthermore, there are also problems with the cleaning of the pipelines, since the sealing rings can be cleaned with common cleaning agents, e.g. Soapy water can also be attacked.
  • Known press connections with sealing rings are therefore only suitable for pipelines in very specific areas of application, e.g. in home automation. This type of press device is unsuitable for industrial pipelines which are exposed to high loads.
  • the turbulence causes erosion effects on the inside of the sleeve, which over time leads to the sleeve breaking. Furthermore, liquid material can penetrate into the gap between the sleeve and the pipe sections. There is then a risk of crevice corrosion occurring in the area of the sleeve on the inside of the pipe wall, as a result of which the pipe sections are gradually destroyed.
  • the present invention has for its object to provide a device for press connection of stirrers, which is simple to set up and attach and which ensures a safe and tight pipe connection using sealing rings.
  • the device should be designed in such a way that the sealing rings do not come into contact with the material to be conveyed or with cleaning agents and good mechanical strength is achieved without the inside of the pipeline having edges, corners and changes that are unfavorable in terms of flow technology.
  • the method is intended to enable simple but nevertheless reliable attachment of the device.
  • Fig. 2 shows the pipe connection according to Fig. 1 in the compressed state.
  • the pipe connections shown in section in the figures each connect two pipes 1, 2 of the same cross section coaxially together.
  • the device for connecting the pipes consists of a connecting sleeve 3, into which the ends of the pipes 1, 2 are inserted from both sides and sealing O-rings 4, 5 and press rings 16, 17 arranged on both sides inside the sleeve 3 18, 19 and 20.
  • the sleeve 3 has a cylindrical outer surface in its end sections, which is interrupted in the middle by an area with a twice reduced cross section.
  • the inner surface accordingly has a plurality of cylindrical and conical surfaces which are graduated from the center in both directions outwards as follows: in the central region 7, the inner surface is cylindrical and has an inner diameter corresponding to the outer diameter of the pipe pieces to be connected. From the inner surface 7, the inner surface widens step-wise towards both sides towards the socket ends. Adjoining the central inner surface 7, the diameter widens over a conical surface 8 and continues in a cylindrical surface 9 with an inner diameter which is approximately twice the tube wall thickness.
  • Another conical surface 10 adjoins the enlarged inner cylinder surface 9.
  • the conical surface 10 merges into a further outer cylindrical inner surface 11 leading to the socket end.
  • the inner surface of the sleeve 3 thus has two inner cylindrical surfaces 9 and 11 on both sides of the central cylindrical surface 7, with diameters increasing toward the sleeve ends, the transitions from the inside to the outside being cone-shaped.
  • a cylindrical sleeve 12 is attached in the interior of the central cylinder surface 7, the outer surface of which coincides with the cylinder surface 7. At the ends of the outer sleeve surface there is a conical transition 14, which in turn continues in a short cylindrical shoulder 15 opposite the inner cylindrical surface 9 of the sleeve. Between the conical surfaces of the sleeve 3 and the sleeve 12 and their cylindrical continuation there is a circumferential niche which receives an O-ring 4. The inner diameter of the sleeve 12 is identical to the inner diameter of the pipe pieces to be connected.
  • Two press rings 16, 17 are relatively thin-walled tubular sleeves.
  • the outer press ring 16 of both has an outer diameter which corresponds to the inner diameter of the outer cylindrical inner surface 11 of the sleeve and an axial extension of approximately half the axial length of the surface 11.
  • the inner press ring 17 has an inner diameter which corresponds to the pipe outer diameter and extends axially wider than the outer ring 16.
  • a further press ring 18 with an essentially wedge-shaped cross section is arranged between the two rings 16 and 17, a further press ring 18 with an essentially wedge-shaped cross section is arranged.
  • the ring 18 has on its side facing the middle of the sleeve outside and inside cylindrical surfaces.
  • the outer cylinder surface 21 fits into the interior of the ring 16 and extends approximately one third of its axial extent into the latter.
  • the inner cylindrical surface 22 of the ring 18 fits over the ring 17 and extends axially somewhat further than to the center thereof.
  • the ring widens conically to a thickness that corresponds to the entire gap width between the pipe and the sleeve.
  • the two rings 16 and 17 end towards the middle of the sleeve at the same height on the end face of a ring 19 which extends radially between pipe 1, 2 and sleeve 3.
  • a further ring 20 is located in the interior of the inner surface 9 of the sleeve, which step has been expanded, and fills the space between the sleeve 3 and the pipe 1, 2 there.
  • Another seal O-ring 5 is located between the rings 19 and 20.
  • the press rings are then pressed into the socket using a suitable tool.
  • the press rings together with the pipe sections are first pushed together against the middle of the socket without relative displacement between the inner and outer press rings.
  • the pipe sections are pushed all the way to the sleeve 12.
  • the face of the stirrer is pressed into the O-ring 4. Crevice corrosion is avoided by this sealing on the end face.
  • the 0-ring 4 is pressed simultaneously into the recess between the sleeve 3 and the sleeve 12.
  • the two thin-walled rings 16 and 17 are moved together with the ring 19 towards the middle of the sleeve, the O-ring 5 being pressed into the reduced remaining cavity in such a way that it completely fills this space.
  • the ring 19 with the wedge-shaped cross-sectional area is pressed between the two thin-walled rings 16 and 17, so that they are deformed and in turn are pressed into the sleeve wall and the pipe wall, which are also deformed in the process.
  • the 0-rings are protected both against the inside of the tube and towards the outside by metallic material in the compressed state, so that the problems mentioned above with O-rings do not occur.
  • the transition between the pipe sections and the sleeve 12 is smooth. There is only a very slight cross-sectional narrowing due to the indentations.
  • connection meets the highest demands in terms of mechanical strength and tightness and that it can be manufactured very easily and without special specialist knowledge on site.
  • the compression rings 16, 17 and 19, 20 are simple pipe sections and can therefore be manufactured simply and inexpensively. Only the press ring 18 with a wedge-shaped cross-sectional area requires a more complex manufacturing process.

Landscapes

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

Abstract

Le manchon (3) servant à raccorder des parties de tuyaux (1, 2) présente entre son milieu et ses extrémités un diamètre intérieur s'élargissant progressivement. Entre le manchon et les parties de tuyaux, il est prévu des bagues d'étanchéité (4, 5) et des bagues de serrage (16, 17, 18, 19, 20) à déplacement axial.
PCT/CH1997/000058 1996-02-22 1997-02-18 Dispositif permettant de produire un raccord de tuyaux WO1997031215A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU15880/97A AU1588097A (en) 1996-02-22 1997-02-18 Device for producing a piping connection

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH46596 1996-02-22
CH465/96 1996-02-22

Publications (1)

Publication Number Publication Date
WO1997031215A1 true WO1997031215A1 (fr) 1997-08-28

Family

ID=4187640

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH1997/000058 WO1997031215A1 (fr) 1996-02-22 1997-02-18 Dispositif permettant de produire un raccord de tuyaux

Country Status (2)

Country Link
AU (1) AU1588097A (fr)
WO (1) WO1997031215A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0922896A1 (fr) * 1997-12-10 1999-06-16 Franz Viegener II GmbH & Co. KG. Connexion sertie indémontable entre un élément de tuyauterie et le bout d'un tuyau en métal
FR2789147A1 (fr) * 1999-02-03 2000-08-04 Legris Sa Dispositif de connexion d'une extremite de conduite a un organe
DE202004007291U1 (de) * 2004-05-07 2005-09-15 Viega Gmbh & Co Kg Pressverbindungsanordnung
US7201382B2 (en) 2004-05-07 2007-04-10 Viega Gmbh & Co. Kg Sealing element

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1597177A (fr) * 1968-12-26 1970-06-22
CH521538A (de) * 1970-07-07 1972-04-15 Buderus Eisenwerk Steckmuffenverbindung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1597177A (fr) * 1968-12-26 1970-06-22
CH521538A (de) * 1970-07-07 1972-04-15 Buderus Eisenwerk Steckmuffenverbindung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0922896A1 (fr) * 1997-12-10 1999-06-16 Franz Viegener II GmbH & Co. KG. Connexion sertie indémontable entre un élément de tuyauterie et le bout d'un tuyau en métal
FR2789147A1 (fr) * 1999-02-03 2000-08-04 Legris Sa Dispositif de connexion d'une extremite de conduite a un organe
DE202004007291U1 (de) * 2004-05-07 2005-09-15 Viega Gmbh & Co Kg Pressverbindungsanordnung
US7201382B2 (en) 2004-05-07 2007-04-10 Viega Gmbh & Co. Kg Sealing element
US7316429B2 (en) 2004-05-07 2008-01-08 Viega Gmbh & Co., Kg Pressed-connection arrangement

Also Published As

Publication number Publication date
AU1588097A (en) 1997-09-10

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