WO2009144359A1 - Raccord à brides - Google Patents

Raccord à brides Download PDF

Info

Publication number
WO2009144359A1
WO2009144359A1 PCT/FI2008/050302 FI2008050302W WO2009144359A1 WO 2009144359 A1 WO2009144359 A1 WO 2009144359A1 FI 2008050302 W FI2008050302 W FI 2008050302W WO 2009144359 A1 WO2009144359 A1 WO 2009144359A1
Authority
WO
WIPO (PCT)
Prior art keywords
groove
locking ring
joined
flange
clamping
Prior art date
Application number
PCT/FI2008/050302
Other languages
English (en)
Inventor
Risto Eriksson
Original Assignee
Gs-Hydro Oy
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 Gs-Hydro Oy filed Critical Gs-Hydro Oy
Priority to PCT/FI2008/050302 priority Critical patent/WO2009144359A1/fr
Publication of WO2009144359A1 publication Critical patent/WO2009144359A1/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
    • F16L23/02—Flanged joints the flanges being connected by members tensioned axially
    • F16L23/024—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes
    • F16L23/028—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes the flanges being held against a shoulder
    • F16L23/0286—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes the flanges being held against a shoulder the shoulder not being formed from the pipe

Definitions

  • the present invention relates to a flange joint comprising a pair of tubular pieces to be joined, a clamping flange mounted on each of the pieces to be joined, retaining means cooperating with the clamping flanges for joining the said pieces, wherein at least one of the clamping flanges is mounted on a corresponding piece to be joined in a manner allowing rotary movement by using a locking ring in the mounting, the said ring being fitted in a locking groove formed in the piece to be joined and in a complementary groove formed in the clamping flange, the said complementary groove joining in the axial direction of the clamping flange with a relief groove extending to the end face of the clamping flange, which relief groove opens towards the joining point of the pieces to be joined.
  • Such flange joints are used especially for joining pipes, in which case each piece to be joined is provided with a clamping flange.
  • Clamping flanges mounted fixedly, for example by welding, to the ends of the pipes to be joined were previously widely used.
  • the material costs incurred by this are relatively high and since the flanges cannot be turned, it is often difficult to align the holes for the retaining means in the flanges at the ends of the pipes to be joined, for example, during reinstallation.
  • a problem with known flange joints allowing a turning movement of the clamping flange has been that the locking ring has often been subjected to rather strong shear forces when the clamping flanges at the ends of the pieces to be joined towards each other have been tightened, which in practice means that the locking ring cannot be reused should the joint have to be uncoupled and then reinstalled.
  • One aim of the present invention is, therefore, to provide an improved flange joint construction making possible the reuse of the locking ring should the joint have to be uncoupled and reinstalled.
  • the flange joint according to the invention is characterised in that the locking ring is essentially circular in cross-section; that both the locking groove and the complementary groove of the clamping flange is provided with a section of the circular surface located essentially opposite in the direction of the diameter of the locking ring in cross-section, the said sections of the circular surface settling, respectively, essentially against the circumferential surface of the locking ring within an angular area of approximately 45°-100° so that the centres of curvature of the said circular surfaces will join essentially with the centre of the locking ring; and that in the complementary groove of the clamping flange is formed a bevelling, which forms an essentially conical transitional area between the circular surface of the complementary groove and the bottom surface of the relief groove.
  • Figure 1 shows a prior art flange joint
  • Figure 2 shows a sectional view of another prior art flange joint, showing the contact of the locking ring with the clamping flange groove
  • Figure 3 shows a sectional view of an embodiment of the improved flange joint according to the invention.
  • the prior art flange joint of Figure 1 described in greater detail in US patent no. 3,966,234, comprises a pipe piece 1 and a welding nip 7 to be joined, the welding nip being welded to another pipe 8.
  • One clamping flange 2 is arranged around the pipe 1 and another clamping flange 9 around the nip 7.
  • Flanges 2 and 9 are tightened together with suitable means, for example a screw/nut combination 10, 11.
  • At least one of the clamping flanges 2 and 9 - in Figure 1 flange 2 - is arranged around the piece 1 to be joined so that in the pipe 1 is formed a locking groove 4 and in the clamping flange 2 is formed a complementary groove 5.
  • these grooves are located opposite each other, they form an essentially closed space, in which is arranged a locking ring 3.
  • the locking ring 3 protrudes radially from the groove 4 into the complementary groove 5 of the flange 2.
  • the locking ring 3 is preferably of metal, but may also be of some other suitable material.
  • the clamping flange 9 around the welding nip 7 may be of any suitable type; it may be, for example, welded to the welding nip 7.
  • Reference numeral 6 denotes a packing placed between the ends of the pieces to be joined.
  • Figure 2 illustrates the functioning of the prior art joint as a cross-sectional view.
  • the locking ring 3 is in contact with the locking groove 4 within a certain angular area, but with the complementary groove 5 the contact becomes linear at point 23. This linear contact creates strong shear forces in the locking ring at the tightening stage.
  • Figure 3 shows an embodiment of the flange joint according to the invention where surfaces forming a part of the circular arch are formed in the locking groove 4 and the complementary groove 5, the said surfaces settling, respectively, essentially against the circumferential surface of the locking ring within an angular area of approximately 45°-100°, so that the centres of curvature of the said circular surfaces will join essentially with the centre 25 of the locking ring.
  • the contact angle area of the locking groove 4 with the locking ring 3 is denoted by reference mark ⁇ and the corresponding contact angle area of the complementary groove 5 with reference mark ⁇ .
  • the contact angle area ⁇ of the complementary groove is preferably about 60°, the starting point of the contact angle area being located about 10° from the middle plane 30 parallel with the axial direction of the piece 1 to be joined passing through the centre point 25 of the locking ring 3.
  • the clamping flange 2 is mounted on the locking ring 3 positioned in the locking groove 4 by pushing it in the axial direction towards the joining point of the pipes to be joined, while the relief groove 22 allows the clamping flange to be pushed over the locking ring 3.
  • a bevelling 21 which forms an essentially conical transitional area between the circular surface of the complementary groove and the bottom surface of the relief groove.
  • the locking ring 3 preferably comprises a coil spring, inside which are fitted reinforcing parts filling essentially the entire coil spring.
  • the reinforcing parts are preferably made into parts of the ring so that each part is at most the size of a semicircle.
  • This type of locking ring is known, for example, from the publication DE 2521806.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)

Abstract

L'invention porte sur un raccord à brides comprenant une paire de pièces tubulaires (1, 7) à raccorder ; une bride de serrage (2, 9) montée sur chaque pièce (1, 7) à raccorder ; des moyens de fixation (10, 11) coopérant avec les brides de serrage (2, 9) pour raccorder les pièces (1, 7). Au moins l'une (2) des brides de serrage est montée sur la pièce correspondante (1) à raccorder, de manière à permettre, lors du montage, un mouvement de rotation avec une bague de verrouillage (3) adaptée dans une rainure de verrouillage (4) formée dans la pièce (1) à raccorder et dans une rainure complémentaire (5) formée dans la bride de serrage (2). La rainure complémentaire est reliée, dans la direction axiale de la bride de serrage, à une rainure de relâchement s'étendant jusqu'à la face d'extrémité (4) de la bride de serrage. La rainure de relâchement s'ouvre vers le point de raccordement des pièces à raccorder. La bague de verrouillage est munie d’une section transversale essentiellement circulaire ; la rainure de verrouillage et la rainure complémentaire (5) de la bride de serrage (2) comportent toutes deux une section de la surface circulaire située essentiellement de façon opposée dans la direction du diamètre de la bague de verrouillage en section transversale. Les sections de la surface circulaire s'appuient, respectivement, essentiellement contre la surface circonférentielle de la bague de verrouillage dans une zone angulaire d'approximativement 45°-100°, de telle sorte que les centres de courbure des surfaces circulaires correspondent essentiellement au centre de la bague de verrouillage. Un chanfrein (21) est formé dans la rainure complémentaire de la bride de serrage. Le chanfrein (21) définit une zone de transition essentiellement conique entre la surface circulaire de la rainure complémentaire (5) et la surface de fond de la rainure de relâchement.
PCT/FI2008/050302 2008-05-26 2008-05-26 Raccord à brides WO2009144359A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/FI2008/050302 WO2009144359A1 (fr) 2008-05-26 2008-05-26 Raccord à brides

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FI2008/050302 WO2009144359A1 (fr) 2008-05-26 2008-05-26 Raccord à brides

Publications (1)

Publication Number Publication Date
WO2009144359A1 true WO2009144359A1 (fr) 2009-12-03

Family

ID=41376631

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2008/050302 WO2009144359A1 (fr) 2008-05-26 2008-05-26 Raccord à brides

Country Status (1)

Country Link
WO (1) WO2009144359A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011103965A1 (fr) * 2010-02-24 2011-09-01 Andocksysteme G. Untch Gmbh Dispositif de liaison pour relier un récipient flexible à une bride ou bague de raccordement
WO2014161545A1 (fr) * 2013-04-04 2014-10-09 Schaeffler Technologies Gmbh & Co. Kg Système de bride, actionneur de châssis et procédé de fabrication du système de bride

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH332255A (fr) * 1956-10-02 1958-08-31 Cipag S A Dispositif de fixation d'une bride sur un élément tubulaire
DE1289696B (de) * 1966-05-24 1969-02-20 Mannesmann Ag Losflanschverbindung fuer Druckrohrleitungen
WO2005078329A1 (fr) * 2004-02-11 2005-08-25 Gs-Hydro Oy Joint a brides comprenant au moins une bride montee de maniere a permettre la rotation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH332255A (fr) * 1956-10-02 1958-08-31 Cipag S A Dispositif de fixation d'une bride sur un élément tubulaire
DE1289696B (de) * 1966-05-24 1969-02-20 Mannesmann Ag Losflanschverbindung fuer Druckrohrleitungen
WO2005078329A1 (fr) * 2004-02-11 2005-08-25 Gs-Hydro Oy Joint a brides comprenant au moins une bride montee de maniere a permettre la rotation

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011103965A1 (fr) * 2010-02-24 2011-09-01 Andocksysteme G. Untch Gmbh Dispositif de liaison pour relier un récipient flexible à une bride ou bague de raccordement
CN103354883A (zh) * 2010-02-24 2013-10-16 弗洛克技术股份公司 用于将柔性容器与法兰或连接环相连接的连接装置
US8720955B2 (en) 2010-02-24 2014-05-13 Flecotec Ag Connecting device for connecting a flexible container to a flange or a connecting ring
WO2014161545A1 (fr) * 2013-04-04 2014-10-09 Schaeffler Technologies Gmbh & Co. Kg Système de bride, actionneur de châssis et procédé de fabrication du système de bride

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