WO2000029142A1 - Procede pour former des troncons de conduite courbes avec des tubes en acier munis d'un revetement de mortier - Google Patents
Procede pour former des troncons de conduite courbes avec des tubes en acier munis d'un revetement de mortier Download PDFInfo
- Publication number
- WO2000029142A1 WO2000029142A1 PCT/EP1999/008784 EP9908784W WO0029142A1 WO 2000029142 A1 WO2000029142 A1 WO 2000029142A1 EP 9908784 W EP9908784 W EP 9908784W WO 0029142 A1 WO0029142 A1 WO 0029142A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tube
- mortar
- annular groove
- rotary support
- bending
- Prior art date
Links
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 curved pipe sections with steel tubes provided with a mortar coating inside the tube.
- elliptical cuts and welds are carried out on machines in the workshop, and thus curved elements are produced in the workshop used to make a curved section of pipe on the site.
- This approach provides good quality, but naturally requires a very precise route study, which must be observed on site. Laying the steel pipe is therefore very similar to laying a cast iron pipe.
- elliptical cuts and welds are carried out manually on site. If the cutting tube is already coated externally with PE or PP, which is most often the case, this coating must first be removed at the place of the elliptical cut. This usually requires
- BEST ⁇ TIGUNGSKOPIE heating the tube from the inside at this point which is not only a painful operation, but also damages the interior lining in cement mortar.
- the elliptical cuts and welds are then carried out manually on the areas thus prepared.
- the repair of the degraded mortar layer must also be done manually. Indeed, because of the geometric discontinuities at the level of the elliptical welds, it is excluded to carry out this repair with mechanical machines, such as generally used on the site for the repair of the concrete at the level of a welded joint between two tubes rights.
- the last step concerns the repair of the external coating of PE or PP at the elliptical welds.
- the manufacture of curved sections of pipe on site therefore has an artisanal and forbidding character, which generally results in a poor quality of execution.
- the object of the present invention is to provide a simpler method for forming curved sections of good quality pipe with steel tubes provided with a coating of mortar which covers 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 tube in steel at this annular groove.
- the latter constitutes a discontinuity in the mortar coating, which allows local bending of the steel tube without ruining the non-deformable mortar coating.
- the groove (s) can be closed with mortar, in order to restore the continuity of the layer of mortar coating inside the tube.
- the method according to the invention makes it possible to avoid the many elliptical cuts and welds, which are currently essential for producing curved pipe sections made of steel tubes provided with an interior mortar coating.
- the present process therefore makes it possible to safeguard the continuity of the steel tube and generally also of its external coating of PE or PP.
- the internal "cylindrical" geometry of the tube is also preserved, that is to say there are no longer the disconti- typical sectional nights for elbows assembled by elliptical welds.
- the method according to the invention makes it possible to economically produce complicated paths, with progressive curvature, allowing perfect adaptation to the terrain. Remain to note that the process is perfectly applicable on mobile site, with machines already employed on site (such as a steel tube bender) or easy to develop (such as a water jet cutting device offered more low), and this with an excellent quality of implementation.
- the annular groove can be dug in many ways, for example using a chainsaw or a hydraulic chisel. However, in order to avoid damage to the steel tube, it is preferred to hollow out the annular groove using a high pressure water jet.
- a special cutting device is advantageously used for this purpose, comprising a rotary support centered in the tube and provided with one or more nozzles supplied with water under high pressure.
- the steel tube can be bent using a conventional tube bender.
- the latter comprises a fixed bending shoe located at the level of the annular groove hollowed out in the mortar covering, as well as a movable bending shoe and a stop shoe located on either side of this annular groove.
- FigJ a cross section through a steel tube provided with an internal coating of mortar, when digging an annular groove in the internal coating using a special device
- Fig.2 a perspective view of the tube of Fig. 1, during the digging of an annular groove in the internal coating of mortar using a special device
- Fig.3 a longitudinal section of the tube of Fig. 1, in a tube bender
- Fig.4 a plan view of a curved pipe section produced according to the method of the present invention.
- Fig. 5 a longitudinal section of the tube after bending, when filling the annular grooves with mortar using a repair machine.
- the same references designate identical or similar elements in the Figures.
- FIG. 1 we see a special cutting device 10 digging an annular groove 12 in a cement mortar 14, which forms an internal protective layer of a steel tube 16 of large diameter.
- This annular groove 12 extends in a radial direction up to the inner surface 18 of the steel tube 16. It is hollowed out using water jets 20 emitted by two nozzles 22, which are connected to a supply of water 24 under high pressure and mounted on a rotary support 26.
- the latter is centered in the tube 16 by means of three centering arms 28 spaced at 120 °.
- Each of the arms 28 is provided with a roller 30. so that the rotary support 26 can be rotated about the axis of the tube 16.
- the centering arms 28 are preferably telescopic arms, in order to be able to 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 shaft 32 is used to drive the rotary support 26 in rotation and to position it in the axial direction in the tube.
- the shaft 32 is advantageously are supported by a guide support 34, which is similar in construction to the rotary support 26 described above.
- the shaft 32 can be driven either manually or by one or more motors. This remark concerns both the rotational movement and the translational movement. If it is necessary to dig several grooves spaced in an axial direction in a tube 16, the groove 12 ′ is preferably produced first of all, which is furthest from the opening 38 of the tube 16 through which the cutting device 10 has been introduced. Then gradually withdraw the latter backwards, to make one after the other the other grooves 12 ", 12. The groove 12 located closest to the opening 38 of the tube 16 through which we introduced the cutting device 10 will be made last.
- a steel tube 16 provided with an internal coating of mortar 14.
- This coating 14 we previously dug three annular grooves 12, 12 ", 12 '" spaced in axial direction.
- the bender 42 comprises a fixed bending shoe 44, which is situated at the level of the median annular groove 12, as well as a movable bending shoe 46 and a stop shoe 48 located on either side of the median annular groove 12.
- the movable bending shoe 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 indeformable coating 14 at the level of the fixed bending shoe 44, so that the latter is not affected by the local bending of the steel tube 16. In other words, this discontinuity avoids the birth of tensions in the coating d e mortar 14, which would cause its ruin.
- 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 have been hollowed out in the internal mortar coating 10 of the steel tube 16 prior to bending, are marked with lines.
- this process allows, with a minimum of welds, complex traces with an almost continuous curvature.
- an external coating of PE or PP which has been applied in the factory on the straight tube, most often remains intact during the bending operation.
- Figure 5 shows the filling of the annular grooves 12 with mortar using a mechanical repair device 52, as it is for example used for repairing the mortar coating 14 at the weld joints between tubes rights.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU17757/00A AU1775700A (en) | 1998-11-16 | 1999-11-15 | Method for forming curved conduit sections with steel tubes provided with a mortar coat |
AT99960979T ATE225218T1 (de) | 1998-11-16 | 1999-11-15 | Verfahren zum formen von gebogenen, mit einer mörtelbeschichtung versehenen stahlrohren |
EP99960979A EP1131171B1 (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 |
DE69903336T DE69903336D1 (de) | 1998-11-16 | 1999-11-15 | Verfahren zum formen von gebogenen, mit einer mörtelbeschichtung versehenen stahlrohren |
Applications Claiming Priority (2)
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 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000029142A1 true WO2000029142A1 (fr) | 2000-05-25 |
Family
ID=19731783
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
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 |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1131171B1 (fr) |
AT (1) | ATE225218T1 (fr) |
AU (1) | AU1775700A (fr) |
DE (1) | DE69903336D1 (fr) |
ES (1) | ES2182588T3 (fr) |
LU (1) | LU90318B1 (fr) |
WO (1) | WO2000029142A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7685857B2 (en) | 2004-08-31 | 2010-03-30 | The Boeing Company | Curved extrusions and method of forming the same |
Citations (7)
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 |
US3799208A (en) * | 1972-05-26 | 1974-03-26 | British Petroleum Co | Pipelines |
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 |
EP0523462A2 (fr) * | 1991-07-19 | 1993-01-20 | Fried. Krupp AG Hoesch-Krupp | Méthode pour enlever des revêtements externes des tubes |
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 |
-
1998
- 1998-11-16 LU LU90318A patent/LU90318B1/fr active
-
1999
- 1999-11-15 AU AU17757/00A patent/AU1775700A/en not_active Abandoned
- 1999-11-15 WO PCT/EP1999/008784 patent/WO2000029142A1/fr active IP Right Grant
- 1999-11-15 EP EP99960979A patent/EP1131171B1/fr not_active Expired - Lifetime
- 1999-11-15 AT AT99960979T patent/ATE225218T1/de not_active IP Right Cessation
- 1999-11-15 DE DE69903336T patent/DE69903336D1/de not_active Expired - Lifetime
- 1999-11-15 ES ES99960979T patent/ES2182588T3/es not_active Expired - Lifetime
Patent Citations (7)
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 |
US3799208A (en) * | 1972-05-26 | 1974-03-26 | British Petroleum Co | Pipelines |
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 |
EP0523462A2 (fr) * | 1991-07-19 | 1993-01-20 | Fried. Krupp AG Hoesch-Krupp | Méthode pour enlever des revêtements externes des tubes |
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 |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 016, no. 208 (M - 1249) 18 May 1992 (1992-05-18) * |
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 11 29 November 1996 (1996-11-29) * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7685857B2 (en) | 2004-08-31 | 2010-03-30 | The Boeing Company | Curved extrusions and method of forming the same |
Also Published As
Publication number | Publication date |
---|---|
DE69903336D1 (de) | 2002-11-07 |
EP1131171A1 (fr) | 2001-09-12 |
LU90318B1 (fr) | 2000-07-18 |
ES2182588T3 (es) | 2003-03-01 |
EP1131171B1 (fr) | 2002-10-02 |
ATE225218T1 (de) | 2002-10-15 |
AU1775700A (en) | 2000-06-05 |
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