WO2000028250A1 - Emmanchement de tuyaux a la presse - Google Patents

Emmanchement de tuyaux a la presse Download PDF

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Publication number
WO2000028250A1
WO2000028250A1 PCT/DE1999/002661 DE9902661W WO0028250A1 WO 2000028250 A1 WO2000028250 A1 WO 2000028250A1 DE 9902661 W DE9902661 W DE 9902661W WO 0028250 A1 WO0028250 A1 WO 0028250A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
press
spring element
connection according
press connection
Prior art date
Application number
PCT/DE1999/002661
Other languages
German (de)
English (en)
Inventor
Bernd Sedlak
Original Assignee
Mapress Gmbh & 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 Mapress Gmbh & Co. Kg filed Critical Mapress Gmbh & Co. Kg
Priority to AU10288/00A priority Critical patent/AU1028800A/en
Publication of WO2000028250A1 publication Critical patent/WO2000028250A1/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
    • F16L13/141—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods

Definitions

  • the invention relates to a pipe press connection, consisting of a press fitting element and a conduit inserted therein, according to the preamble of claim 1.
  • the press fitting system for house installations made of carbon steel (carbon steel) or high-alloy steel is known (see brochure of Mannesmann Pressfitting GmbH, Mannesmann press fitting system / sanitary, edition 8/94 and Mannesmann
  • Pressfitting system / heating, edition 11/94 or DE-OS 27 25 280 This system is characterized by a plastically deformable press fitting element made of metal which, depending on the design as an elbow or T-piece or sleeve or transition piece, has at least one area with a bead-like cross section and a sealing ring area, followed by a longitudinally extending area with a cylindrical shape. At the end of the extension of this cylindrical area, a radially inwardly extending bead-shaped depression is pressed, which serves as a stop for the insertable smooth-ended thin-walled metal conduit.
  • the third element of the press fitting system already mentioned is the sealing ring. This becomes a rubber elastic
  • Material such as B. butyl rubber usually made in the form of a round sealing ring.
  • the bead-like end of the press fitting element is plastically deformed and the sealing ring enclosed therein is deformed elastically by means of a press tool having at least two press jaws.
  • a bead-shaped depression is plastically pressed, which also includes the line pipe inserted underneath.
  • the only elastically deformed sealing ring takes on the sealing function in this connection system, while the pressed bead-shaped recess absorbs the longitudinal forces generated by the internal pressure and part of the moments.
  • a disadvantage of this arrangement is that due to the material used for the sealing ring, the range of use of the system is limited with regard to the temperature and with regard to the media to be transported.
  • DE 19544 161 A1 discloses changing the cross-sectional geometry and / or the structure of the sealing ring used in such a way that use up to a temperature of 300 ° C. is also possible.
  • a sealing ring made of butyl rubber one based on fluoropolymers is used.
  • the practical tests remained unsatisfactory, since the fundamental problem of the greatly different expansion coefficient between plastic for the sealing ring and metal for the press fitting element was somewhat reduced, but could not be eliminated.
  • the acceptance of aggressive media to be transported has not been investigated, so that this problem is still not solved.
  • the object of the invention is to provide a pipe press connection which can be used universally while maintaining the tried-and-tested pressing technology and with which in particular higher temperatures and the transport of aggressive media can be controlled.
  • a sealing ring made of a rubber-elastic material such.
  • B. butyl rubber or similar materials used an annular metallic element as a sealant.
  • this can be a ring made of copper, the yield strength of which is much lower than that of the made of steel press fitting element or conduit.
  • the copper ring is plastically deformed during molding and forms metallic sealing surface pairings with the conduit and the ring bulge, so that the hydraulic tightness is guaranteed.
  • Another possibility is to design the metallic element as a spring element, the latter being established after the pressing
  • Resilience is less than the stiffness of the plastically deformed ring bead.
  • the last-mentioned condition means that the thickness and the spring constant for the spring element are chosen so that the resilience resulting after the pressing is not sufficient to bend the plastically deformed ring bead.
  • the springback force must be so great that a metallic seal is guaranteed even under long-term exposure.
  • Line pipe and sealant are made of metal. If the sealant is designed as a spring element, this is usually made of a high-alloy steel, a material that is at least equivalent to the material used for the press fitting element and the conduit.
  • the outer diameter of the spring element can be reduced to a value which is at most equal to or smaller than the diameter of the opening of the press fitting element facing the insertion side.
  • the spring element preferably consists of a thin sheet metal strip with a thickness in the range from 0.1 to 0.4 mm.
  • the spring element can be shaped into different cross-sectional configurations, but which all have in common that these have at least one contact surface facing the conduit. As a rule, the spring element will have at least one contact surface facing the conduit and the annular bead. As a special case, two contact areas can also be formed, in the sense of double security, if a sealing level should fail.
  • the cross-sectional configuration of the spring element can also be designed in such a way that it presents only a slight resistance to the conduit to be inserted, but a high resistance to the conduit to be pulled out. Then, for example, the spring element is provided with a notch which is directed towards the insertion tube and is inclined in the direction of insertion. The spring element thus fulfills a double function; once the
  • Sealing function and on the other hand a safeguard against unintentional pulling out of the conduit from the press fitting element before the pressing. This pulling out can occur if, for example, an attempt is made to compensate for the length of a pipe which is cut a little too short when the line pipe section is installed. Pulling out can result in a positioning between the inserted conduit and press fitting element, with which a perfect pressing is no longer guaranteed.
  • Figure 1 in longitudinal section a first embodiment of the pipe press connection designed according to the invention before pressing
  • FIG 17 a first embodiment of the pipe press connection designed according to the invention is shown in a longitudinal section.
  • This pipe press connection consists of a press fitting element 1 and a conduit pipe 2 inserted therein.
  • the press fitting element 1 has, in a known manner, an outwardly extending bulge-shaped area 3, an adjoining cylindrically shaped section 4, which is provided with a shoulder 5 and merges into one a smaller diameter also cylindrical section 6.
  • the press fitting element 1 shown here can be part of a sleeve, an elbow, a T-piece, a reducer or the like. In contrast to the known state of the art, is in the form of a bead
  • Area 3 is not a sealing ring made of butyl rubber, but a metallic spring element 7 is arranged.
  • the cross-sectional configuration shown here corresponds approximately to a pretzel shape, the rounding area of which faces the insertion side.
  • the direction of insertion of the conduit 2 into the press fitting element 1 is indicated by a thickly drawn arrow 8 and the opposite direction by an arrow 9 shown with dashed lines.
  • the outer diameter must be able to be reduced so far that it is at most equal to or smaller than the diameter 10 of the opening of the press fitting element 1 facing the insertion side.
  • the assembly can be facilitated if this diameter 10 of the opening is larger is chosen as otherwise usual.
  • FIG. 2 shows more clearly than the illustration in FIG. 1 that the spring element 7 can be reduced in diameter in order to enable assembly through the opening 16 of the press fitting element 1. Furthermore, it can be seen that after assembly, but before pressing, the inner diameter 17 of the spring element 7 is larger than the outer diameter 18 of the inserted conduit 2. This has the advantage that the conduit 2 can be inserted into the press fitting element 1 without resistance and no radial force is exerted on the conduit 2 by the spring element 7 which has not yet been pressed.
  • Figure 3 shows the same pipe press connection as Fig. 1, but after the pressing.
  • the plastically deformed press fitting element 1 ' as well as the plastically deformed annular bead 3 ' and the elastically deformed spring element 7 ' are marked in contrast to FIG. 1 with a prime.
  • the detail "X" (Fig. 4) illustrates the situation after the pressing.
  • the spring element 7 ' is elastically compressed by the plastic deformation of the annular bead 3 ' , so that the two convexly curved areas 19, 20 of the spring element 7 'come to rest on the apex region of the annular bead 3 ' on the one hand and on the other hand on the conduit 2 .
  • the level of strength and thus the axial securing against pushing the conduit 2 out of the press fitting element 1 form the two beads 14, 15 formed by the pressing, on the one hand in the cylindrical section 4 of the press fitting element 1 ' and on the other hand in the conduit 2.
  • FIGS. 5-16 show exemplary embodiments for the spring element 7.1-7.12 after assembly in the press fitting element 1, but before the pressing, the embodiment 7.1 shown in FIG. 5 being identical to the representation in FIGS. 1 and 2.
  • the 6, 7, 9, 10, 12 and 16 show that the position of the curved supporting section of the spring element 7 is important for the shape of the annular bead 3. 5, 8, a shape of the annular bead 3 is selected with a radially straight section 22 forming the opening 16.1. If the supporting section, on the other hand, faces away from the insertion side, the section 16.2 forming the opening runs Section 23 obliquely (see Fig. 6, 7, 9, 10, 12, 13). To the right one
  • the spring element 7.3, 7.6, 7.7, 7.8, 7.9 can have at least one section 11, 12 extending into the opening 16.2 (see FIGS. 7, 10, 11, 12, 13).
  • the section 11 lying in the bore of the opening 16.1 can additionally have an angled portion 13 lying in the direction of the apex region of the annular bead 3.1 (FIG. 11).
  • the embodiment of the spring element 7.1 1 according to FIG. 15 has a special position. This has two convexly curved regions 24, 25 lying at an axial distance from one another, each with two regions in the annular bead 3.4 and two areas on the conduit 2 come into contact. This means a kind of double protection if a pair of sealing surfaces should fail.
  • the spring element 7.13 which is provided with a pull-out protection.
  • the spring element 7.13 has at least one notch 21 arranged on the circumference, which faces the conduit 2 and is inclined in the direction of insertion 8.
  • This arrangement has the advantage that when the line pipe 2 is inserted 8 into the press fitting element 1, the section 26 having the notch 21 yields elastically. If, on the other hand, an attempt is made to pull the conduit 2 out before the pressing 9, the notches or more notches 21 would dig into the outer surface of the conduit 2 and thus fix the conduit 2.

Abstract

L'invention concerne un emmanchement de tuyaux à la presse. Cet emmanchement est constitué d'un élément d'emmanchement à la presse (1) qui présente au moins une zone (3) qui reçoit un moyen d'étanchéité (7) et dont la section est conçue sous forme de bourrelet, et une zone (4) adjacente cylindrique opposée au côté d'insertion. Cette zone (4) se transforme en une section adjacente cylindrique de diamètre intérieur plus petit et formant une butée. Cet emmanchement comprend également une conduite (2) à paroi mince qui, une fois insérée dans l'élément d'emmanchement, est en contact par sa zone terminale lisse avec la butée intérieure de l'élément d'emmanchement. Après application et fermeture d'un outil de presse comportant au moins deux mâchoires et entourant l'élément d'emmanchement, on obtient un emmanchement de tuyaux définitif et étanche. Lors de la compression, les mâchoires agissent aussi bien sur le bourrelet circulaire et le moyen d'étanchéité inséré dedans, que sur la section cylindrique de l'élément d'emmanchement, opposée au côté d'insertion. L'invention est caractérisée en ce que le moyen d'étanchéité (7) est un élément métallique annulaire.
PCT/DE1999/002661 1998-11-09 1999-08-20 Emmanchement de tuyaux a la presse WO2000028250A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU10288/00A AU1028800A (en) 1998-11-09 1999-08-20 Press-fitted pipe joint

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1998152861 DE19852861C1 (de) 1998-11-09 1998-11-09 Rohrpreßverbindung
DE19852861.2 1998-11-09

Publications (1)

Publication Number Publication Date
WO2000028250A1 true WO2000028250A1 (fr) 2000-05-18

Family

ID=7887997

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1999/002661 WO2000028250A1 (fr) 1998-11-09 1999-08-20 Emmanchement de tuyaux a la presse

Country Status (3)

Country Link
AU (1) AU1028800A (fr)
DE (1) DE19852861C1 (fr)
WO (1) WO2000028250A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1424523A1 (fr) * 2002-11-27 2004-06-02 Mapress GmbH & Co. KG Raccord de tuyaux
ES2386569A1 (es) * 2010-01-04 2012-08-23 Jose Gonzalez Riera Accesorio para tuberias
EP3412953A1 (fr) * 2017-06-09 2018-12-12 VSH Fittings B.V. Raccord à sertir ayant une bague d'écartement sensiblement en forme de v comportant des parties de paroi de contact s'étendant axialement sur les côtés opposés d'une cavité

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104197126A (zh) * 2014-08-29 2014-12-10 陈征 一种唇密封卡压式管件接头及其安装工艺

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4880260A (en) * 1987-07-06 1989-11-14 Mie Hooro Co., Ltd. Method of joining pipes
DE19544161A1 (de) * 1994-12-27 1996-07-04 Mannesmann Ag Preßfitting zur Herstellung einer unlösbaren dichten Verbindung von Rohren
DE19631574C1 (de) * 1996-07-26 1997-11-13 Mannesmann Ag Rohrverbindung

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2725280A1 (de) * 1977-06-01 1978-12-14 Mannesmann Roehren Werke Ag Rohrverbindung fuer leitungsrohre

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4880260A (en) * 1987-07-06 1989-11-14 Mie Hooro Co., Ltd. Method of joining pipes
DE19544161A1 (de) * 1994-12-27 1996-07-04 Mannesmann Ag Preßfitting zur Herstellung einer unlösbaren dichten Verbindung von Rohren
DE19631574C1 (de) * 1996-07-26 1997-11-13 Mannesmann Ag Rohrverbindung

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1424523A1 (fr) * 2002-11-27 2004-06-02 Mapress GmbH & Co. KG Raccord de tuyaux
ES2386569A1 (es) * 2010-01-04 2012-08-23 Jose Gonzalez Riera Accesorio para tuberias
EP3412953A1 (fr) * 2017-06-09 2018-12-12 VSH Fittings B.V. Raccord à sertir ayant une bague d'écartement sensiblement en forme de v comportant des parties de paroi de contact s'étendant axialement sur les côtés opposés d'une cavité
NL2019041B1 (en) * 2017-06-09 2018-12-17 Vsh Fittings B V Press fitting having a substantially V-shaped spacer ring with contact wall parts at opposing sides of a hollow

Also Published As

Publication number Publication date
AU1028800A (en) 2000-05-29
DE19852861C1 (de) 2000-08-03

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