EP1131171B1 - Verfahren zum formen von gebogenen, mit einer mörtelbeschichtung versehenen stahlrohren - Google Patents

Verfahren zum formen von gebogenen, mit einer mörtelbeschichtung versehenen stahlrohren Download PDF

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Publication number
EP1131171B1
EP1131171B1 EP99960979A EP99960979A EP1131171B1 EP 1131171 B1 EP1131171 B1 EP 1131171B1 EP 99960979 A EP99960979 A EP 99960979A EP 99960979 A EP99960979 A EP 99960979A EP 1131171 B1 EP1131171 B1 EP 1131171B1
Authority
EP
European Patent Office
Prior art keywords
tube
mortar
annular groove
bending
coating
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.)
Expired - Lifetime
Application number
EP99960979A
Other languages
English (en)
French (fr)
Other versions
EP1131171A1 (de
Inventor
Michel Cauche
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.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1131171A1 publication Critical patent/EP1131171A1/de
Application granted granted Critical
Publication of EP1131171B1 publication Critical patent/EP1131171B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/16—Cutting rods or tubes transversely
    • B26D3/163—Cutting tubes from the inside
    • 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
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00—Severing by means other than cutting; Apparatus therefor
    • B26F3/004—Severing by means other than cutting; Apparatus therefor by means of a fluid jet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00—Severing by means other than cutting; Apparatus therefor
    • B26F3/06—Severing by using heat

Definitions

  • the present invention relates to a method for forming sections of curved pipe with steel tubes fitted with a mortar coating inside the tube.
  • the object of the present invention is to provide a simpler method to form good quality curved pipe sections with tubes steel with mortar coating covering the internal surface of the tube. According to the invention, this problem is solved by a method according to the first claim.
  • the present invention proposes to dig at least one annular groove in the mortar coating and then bend the steel tube at this annular groove.
  • the latter constitutes a discontinuity in the coating mortar, which allows local bending of the steel tube without ruining the coating non-deformable mortar.
  • the method according to the invention allows avoid the many elliptical cuts and welds, which are currently essential for making curved sections of pipe made up of steel tubes with an internal mortar coating.
  • the present process therefore allows the continuity of the steel tube to be saved and generally also of its external coating in PE or PP.
  • Digging the annular throat can be done in many ways, for example using a chainsaw or a hydraulic chisel.
  • the steel tube can be bent using a conventional tube bender.
  • the latter includes a fixed bending shoe located at the level of the annular groove dug in the mortar coating, as well as a shoe movable bending and a stop shoe located on either side of this groove annular.
  • FIG. 1 we see a special cutting device 10 digging an annular groove 12 in a cement mortar 14, which forms a layer of internal protection of a steel tube 16 of large diameter.
  • This throat annular 12 extends in radial direction to the inner surface 18 of the tube made of steel 16. It is hollowed out using water jets 20 emitted by two nozzles 22, which are connected to a high pressure water supply 24 and mounted on a rotary support 26. The latter is centered in the tube 16 by through three centering arms 28 spaced 120 ° apart. Each of the arms 28 is provided with a roller 30, so that the rotary support 26 can be rotated around the axis of the tube 16.
  • the rotating support 26 180 ° in one direction, respectively 90 ° in the first direction and 90 ° in the opposite. If it is necessary to widen a throat thus formed, it suffices to move the rotary support 26 in the axial direction to perform a second gorge in the immediate vicinity of the first gorge.
  • the arms centering 28 are preferably telescopic arms, so that center the rotary support 26 in tubes of different internal diameters.
  • the rotary support 26 is provided with a drive shaft 32 arranged in the axis of the tube.
  • This tree 32 is used to drive the rotary support 26 in rotation and to position it in the axial direction in the tube 16.
  • the shaft 32 is advantageously supported by a guide support 34, which is of similar construction to the rotary support 26 described above.
  • the shaft 32 can be driven either manually, either by one or more motors. This remark concerns as well the rotational movement, that the translational movement.
  • the groove 12 ′ which is the farthest is produced first of the opening 38 of the tube 16 through which the insertion device has been introduced section 10. Then gradually remove the latter backwards, to make the other grooves 12 ", 12 one after the other.
  • the groove 12 located most near the opening 38 of the tube 16 through which the device was introduced cutting 10, will be made last.
  • a tube in steel 16 provided with an internal coating of mortar 14.
  • the bender 42 includes a fixed bending shoe 44, which is located at the level of the median annular groove 12, as well as a bending shoe mobile 46 and a stop shoe 48 located on either side of the annular groove median 12.
  • the bending shoe mobile 46 applies a bending moment to the tube 16 to bend the tube 16 around the fixed bending shoe 44.
  • the reaction moment is taken up by the stop shoe 48.
  • the annular groove 12 in the mortar coating constitutes an axial discontinuity of this non-deformable coating 14 at the level of the shoe fixed bending 44, so that it is not affected by the bending local of the steel tube 16. In other words, this discontinuity prevents the birth of tensions in the mortar coating 14, which would cause its ruined.
  • Figure 4 shows a curved pipe section 50 produced according to the method of the present invention.
  • the multiple annular grooves 12, 12 ', 12 ", 12 “', which were dug in the internal mortar coating 10 of the tube steel 16 prior to bending, are marked with lines.
  • this process allows, with a minimum of welds, complex plots with almost continuous curvature.
  • an external coating of PE or PP which has been applied in the factory on the straight tube, remains most often intact during the bending operation.
  • Figure 5 shows the filling of the annular grooves 12 with mortar using a mechanical repair device 52, such as it is for example used for repairing the mortar coating 14 at the joints of welding between straight tubes.
  • a mechanical repair device 52 such as it is for example used for repairing the mortar coating 14 at the joints of welding between straight tubes. It will be appreciated that the use of such a machine mechanical 52 becomes possible, since cold bending avoids discontinuities in the "cylindrical" geometry of the passage section of the tube 16, which are typical for curved pipe sections obtained by cutting and elliptical welds.

Claims (9)

  1. Verfahren zum Formen von gebogenen Rohrleitungsabschnitten mit Stahlrohren (16), deren Innenfläche (18) mit einer Mörtelbeschichtung (14) versehen ist,
    dadurch gekennzeichnet, dass
    in diese Mörtelbeschichtung (14) mindestens eine Ringnut (12) eingetieft wird und
    das Stahlrohr (16) an dieser Ringnut (12) gebogen wird.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass nach dem Biegen des Rohrs (16) die Ringnut (12) zugemörtelt wird.
  3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass die Ringnut (12) mit einem Hochdruckwasserstrahl (20) in den Mörtel eingetieft wird.
  4. Verfahren nach irgendeinem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass zum Eintiefen der Ringnut (12) eine Schneidevorrichtung (10) verwendet wird, welche aus einem Drehgestell (26) besteht, das im Rohr (16) zentriert ist und eine oder mehrere mit Hochdruckwasser beaufschlagte Spritzdüsen (22) aufweist.
  5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass das Drehgestell (26) im Rohr (16) mittels dreier Ausfahrarme (28) zentriert ist.
  6. Verfahren nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass das Drehgestell (26) eine axial zum Rohr (16) angeordnete Antriebswelle (32) aufweist, wobei ein mittels dreier Ausfahrarme (28) im Rohr (16) zentriertes Führungsgestell (34) die Antriebswelle (32) vom Drehgestell (26) beabstandet führt.
  7. Verfahren nach irgendeinem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass das Stahlrohr (16) mittels einer Biegevorrichtung (42) gebogen wird, welche aus einem unbeweglichen, an der Ringnut (12) befindlichen Biegeschuh (44) sowie auf je einer Seite der Ringnut (12) aus einem beweglichen Biegeschuh (46) und einem Anschlagschuh (48) besteht.
  8. Verfahren nach irgendeinem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass eine Wiederherstellung der Mörtelbeschichtung (14) durch Nacharbeit an der Ringnut (12) nach dem Biegevorgang durch ein in das Rohr (16) eingeführtes mechanisches Nacharbeitswerkzeug (52) erfolgt.
  9. Verfahren nach irgendeinem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass
    mehrere Ringnuten (12, 12', 12", 12"') in die Mörtelbeschichtung (14) eines geraden Abschnittes einer Rohrleitung axial beabstandet eingetieft werden und
    das Stahlrohr (16) an diesen Ringnuten (12, 12', 12", 12"') zur Erreichung einer nahezu durchgehenden Biegung gebogen wird.
EP99960979A 1998-11-16 1999-11-15 Verfahren zum formen von gebogenen, mit einer mörtelbeschichtung versehenen stahlrohren Expired - Lifetime EP1131171B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
LU90318A LU90318B1 (fr) 1998-11-16 1998-11-16 Proc-d- pour former des tron-ons de conduite courbes avec des tubes en acier munis d'un rev-tement de mortier
LU90318 1998-11-16
PCT/EP1999/008784 WO2000029142A1 (fr) 1998-11-16 1999-11-15 Procede pour former des troncons de conduite courbes avec des tubes en acier munis d'un revetement de mortier

Publications (2)

Publication Number Publication Date
EP1131171A1 EP1131171A1 (de) 2001-09-12
EP1131171B1 true EP1131171B1 (de) 2002-10-02

Family

ID=19731783

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99960979A Expired - Lifetime EP1131171B1 (de) 1998-11-16 1999-11-15 Verfahren zum formen von gebogenen, mit einer mörtelbeschichtung versehenen stahlrohren

Country Status (7)

Country Link
EP (1) EP1131171B1 (de)
AT (1) ATE225218T1 (de)
AU (1) AU1775700A (de)
DE (1) DE69903336D1 (de)
ES (1) ES2182588T3 (de)
LU (1) LU90318B1 (de)
WO (1) WO2000029142A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060059848A1 (en) 2004-08-31 2006-03-23 The Boeing Company Curved extrusions and method of forming the same

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB390976A (en) * 1931-07-23 1933-04-20 William Taren Tate Improved apparatus for lining pipes with cementitious material
GB538960A (en) * 1940-02-21 1941-08-22 Harry Da Costa Improvements in refractory linings for pipes or other conduits or narrow chambers
GB1375465A (de) * 1972-05-26 1974-11-27
US4785854A (en) * 1986-11-25 1988-11-22 Shaw Industries Ltd. Method of coating metal pipe having bending capability
JPH0434176A (ja) * 1990-05-30 1992-02-05 Mitsubishi Heavy Ind Ltd 円筒構造物の切断装置
DE4124084A1 (de) * 1991-07-19 1993-01-21 Hoesch Ag Verfahren zum entfernen von auf rohren befindlichen beschichtungen
JPH08187664A (ja) * 1994-11-04 1996-07-23 Konoike Constr Ltd ウォータージェットによる構造物切断破砕方法及びその装置

Also Published As

Publication number Publication date
WO2000029142A1 (fr) 2000-05-25
DE69903336D1 (de) 2002-11-07
EP1131171A1 (de) 2001-09-12
LU90318B1 (fr) 2000-07-18
ES2182588T3 (es) 2003-03-01
ATE225218T1 (de) 2002-10-15
AU1775700A (en) 2000-06-05

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