EP2873470A1 - Verfahren und Vorrichtung zur Herstellung von wasserdichten, gewellten Rohrleitungen aus Metallblech, und nach diesem Verfahren hergestelltes wasserdichtes, gewelltes Metallrohr - Google Patents

Verfahren und Vorrichtung zur Herstellung von wasserdichten, gewellten Rohrleitungen aus Metallblech, und nach diesem Verfahren hergestelltes wasserdichtes, gewelltes Metallrohr Download PDF

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Publication number
EP2873470A1
EP2873470A1 EP20130005356 EP13005356A EP2873470A1 EP 2873470 A1 EP2873470 A1 EP 2873470A1 EP 20130005356 EP20130005356 EP 20130005356 EP 13005356 A EP13005356 A EP 13005356A EP 2873470 A1 EP2873470 A1 EP 2873470A1
Authority
EP
European Patent Office
Prior art keywords
opposite
longitudinal
strip
rubber gasket
crimping
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.)
Granted
Application number
EP20130005356
Other languages
English (en)
French (fr)
Other versions
EP2873470B1 (de
Inventor
Sándor Torma
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.)
TUBOSIDER S.P.A.
Original Assignee
Tubosider International SA
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 Tubosider International SA filed Critical Tubosider International SA
Priority to EP13005356.4A priority Critical patent/EP2873470B1/de
Priority to HUE13005356A priority patent/HUE030252T2/en
Priority to PL13005356T priority patent/PL2873470T3/pl
Priority to RU2014139418/02A priority patent/RU2598411C2/ru
Publication of EP2873470A1 publication Critical patent/EP2873470A1/de
Application granted granted Critical
Publication of EP2873470B1 publication Critical patent/EP2873470B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/12—Making tubes or metal hoses with helically arranged seams
    • B21C37/121—Making tubes or metal hoses with helically arranged seams with non-welded and non-soldered seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/12—Making tubes or metal hoses with helically arranged seams
    • B21C37/124—Making tubes or metal hoses with helically arranged seams the tubes having a special shape, e.g. with corrugated wall, flexible tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/12—Making tubes or metal hoses with helically arranged seams
    • B21C37/126—Supply, or operations combined with supply, of strip material

Definitions

  • the present invention relates to a method for manufacturing watertight, corrugated metal pipes from a strip of metal sheet, as well as to an apparatus for carrying out such method and to a watertight, corrugated metal pipe resulting from the method.
  • corrugated metal pipes up to 3-4 meters in diameter from a strip of metal sheet, e.g., a galvanized steel sheet 1.2 to 3.5 mm thick and about 200 mm to 1200 mm wide.
  • a flat strip which is generally unwound from a coil, is firstly made corrugated, i.e., ondulated, by successive passages between couples of counterposed, corrugating barrels having alternated circumferential ridges on their outer surface.
  • a series of corrugations e.g., four corrugations
  • the corrugated strip is then coiled into a helical shape by a set of coiling rollers, and the opposite, longitudinal lips of the strip are crimped together by a couple of counterposed, crimping rollers, so that a helically corrugated pipe is formed. Thereafter, the opposite ends of the corrugated pipe may be sawed, e.g., at right angles to the axis of the pipe. Depending on the specific application, the opposite ends of the pipe can be closed by peripherally welded steel covers.
  • pipes of the above type are required to have watertight capabilities.
  • Another known method for providing corrugated metal pipes with watertightness capabilities consists of inserting a rubber string gasket having a circular profile between the longitudinal lips of the strip which are crimped together.
  • the gasket is positioned in the gap defined between the edge of one lip and the inner surface of the opposite lip, which is U-bent to embrace the other lip during crimping.
  • the diameter of the gasket is conventionally chosen a little larger than the thickness of the steel sheet, e.g., a 4 mm gasket for a steel sheet 2.5 mm thick, so that the gasket in its operative configuration is subject to a slight elastic deformation.
  • the string gasket is liable to twist and/or distort during its insertion between the longitudinal lips of the steel sheet, before the latter are crimped together. Consequently, the string gasket may easily slip outside of its seat (i.e., the above-defined gap) and tear during crimping, resulting in uneven and unreliable watertightness along the crimped longitudinal lips of the pipe.
  • FIG. 1-5 An apparatus for manufacturing watertight, corrugated metal pipes from a strip 12 of metal sheet, e.g., a galvanized steel sheet 3 mm thick and 1 meter wide, is illustrated in Figs. 1-5 .
  • metal sheet e.g., a galvanized steel sheet 3 mm thick and 1 meter wide
  • Figs. 1-5 An apparatus for manufacturing watertight, corrugated metal pipes from a strip 12 of metal sheet, e.g., a galvanized steel sheet 3 mm thick and 1 meter wide.
  • other conventional metallic materials can be used, e.g., an aluminum-coated steel sheet or a magnesium-coated steel sheet 1.2 to 3.5 mm thick.
  • strip 12 is unwound from a coil 14 mounted on a motorized hub 16 which is rotatably supported on an elongated frame 18 of the apparatus at an upstream end thereof.
  • Strip 12 is made corrugated (i.e., ondulated) in a corrugating station 19 by successive passages between couples of horizontal, counterposed corrugating barrels which are rotatably supported by frame 18 with their axes lying at right angles to the longitudinal direction of strip 12 unwinding from coil 14.
  • Each couple comprises a lower corrugating barrel such as 20 and an upper corrugating barrels such as 22 which engage strip 12 on respective opposite sides thereof.
  • Corrugating barrels 20, 22 have alternated, circumferential rounded ridges 24, 26 on their outer surfaces, the ridges on one barrel of the couple being at least partially inserted between the ridges on the other barrel in the couple.
  • a series of corrugations e.g., four corrugations
  • the distance between the axes of the corrugating barrels 20, 22 of the couple is gradually reduced from the first couple to the last couple in the succession, whereby strip 12 is deformed gradually.
  • upper corrugating barrels 22 are supported at their opposite ends by respective slides such as 27, the vertical position of which is manually adjustable by respective screw mechanisms such as 28.
  • Corrugating barrels 20, 22 are driven to rotate by motor means M via a gearbox G.
  • the corrugating barrels 20, 22 of the last couple are provided, at their opposite ends, with bending means consisting of circumferential bending ridges 30a, 30b and 32a, 32b which cooperate to bend outer longitudinal lip 12a at right angles downwards and inner longitudinal lip 12b at right angles upwards.
  • a shearing unit (not shown) may be conventionally provided upstream of the succession of corrugating barrels 20, 22 for shearing strip 12 transversely, in case the latter deviates from the correct longitudinal direction while unwinding from coil 14.
  • strip 12 processed by the series of corrugating barrels 20, 22 is then coiled into a helical shape in a coiling station 34, with the opposite, longitudinal lips 12a, 12b of strip 12 which overlap laterally.
  • Coiling station 34 comprises two sets of coiling rollers 36a, 36b arranged at different levels which engage the lower face of strip 12, and a third set of coiling rollers 36c which engage the upper face of strip 12 between the first two sets.
  • the three sets of coiling rollers are all supported by a second frame 37.
  • the opposite, longitudinal lips 12a, 12b of strip 12 are also crimped together by a couple of counterposed, crimping rollers 38, 39.
  • One of the crimping rollers (lower crimping roller 38 in Fig. 5 ) is biased towards the other one (upper crimping roller 39) by a hydraulic actuator 40 which may be operated for adjusting the crimping pressure.
  • a rubber gasket 42 having a substantially U-bent profile is fitted to one of the opposite longitudinal lips 12a, 12b, preferably inner longitudinal lip 12b which is bent upwards; accordingly, by effect of the crimping pressure, gasket 42 is drastically reduced in thickness, with plastic deformation of the material of the gasket at least in certain areas of the longitudinal lips which are biased against each other by the crimping action, as will be disclosed in more detail below.
  • Fig. 6-8 show longitudinal lips 12a, 12b of strip 12 in successive configurations during crimping.
  • rubber gasket 42 is fitted to inner longitudinal lip 12b of strip 12, while outer longitudinal lip 12a is still far away from overlapping it.
  • outer longitudinal lip 12a overlaps inner longitudinal lip 12b, but the crimping action has not begun yet and rubber gasket 42 is still undeformed.
  • the opposite longitudinal lips 12a, 12b are crimped together and gasket 42 is consequently crushed and deformed plastically.
  • gasket 42 is substantially reduced to a thin film mainly in the flat areas 12'a, 12"a, 12'b, 12"b of longitudinal lips 12a, 12b which are biased against each other by the crimping action.
  • the gaps defined between the edge of one lip and the inner surface of the opposite lip which is U-bent about the first lip are also filled with the material of the gasket in 43a, 43b, as shown in Fig. 8 .
  • the exceeding rubber 43c projecting outside of the lock seam can be subsequently cut.
  • the thickness of the rubber gasket (before crimping) is preferably in the range 0.5 to 2.5 mm.
  • a squared U-shaped rubber gasket 42 is used, with the outer leg 42a of the U-shape which is longer than the inner leg 42b.
  • a rubber gasket 1.5 mm thick and 6 mm wide can be used, with a longer leg 12 mm long and a shorter leg 0.9 mm long.
  • rubber gasket 42 is unrolled from a coil 44 which is rotatably supported with horixontal axis upstream of coiling station 34 by a third frame 45.
  • Rubber gasket 42 is guided to engage longitudinal lip 12b of strip 12 by guiding means.
  • the latter consist of a hollow guiding arm 46, in which the gasket is slidably inserted, and which is also supported by third frame 45.
  • the profile of the rubber gasket can be extensively varied within a wide range of profiles either matching or not with the profile of the steel sheet, provided that the bent profile of the gasket is capable of embracing the longitudinal lip of the strip at least partially; for instance, gaskets 142 and 242 as shown in Figs. 9 and 10 , which respectively have a substantially U-bent profile with diverging legs 142a, 142b and a V-bent profile, as well as gaskets 342 as shown in Fig. 11 , which have a substantially L-bent profile, will fall within the scope of this invention.
  • the crimping pressure which can be adjusted by hydraulic actuator 40, is preferably set in the range 0 to 9000 psi, more preferably 5000 to 6000 psi.
  • the material of the gasket is preferably polychloroprene.
  • other natural or synthetic rubbers having similar mechanical properties can be used, such as nitrile rubber.
  • the opposite ends of the pipe can be conventionally cut, e.g., at right angles to the axis of the pipe, and, depending on the specific application, they can be closed by steel covers welded peripherally, in a manner known per se.
  • the processing time also is unaffected, since the rubber gasket can be continuously fed to the steel strip regardlees of the feeding speed of the latter.
  • the number of circumferential ridges that is increased step by step.
  • the number of passages between counterposed corrugating rollers could be reduced or increased, depending on various factors, such as the thickness of the steel sheet.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gasket Seals (AREA)
EP13005356.4A 2013-11-14 2013-11-14 Verfahren und Vorrichtung zur Herstellung von wasserdichten, gewellten Rohrleitungen aus Metallblech Not-in-force EP2873470B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP13005356.4A EP2873470B1 (de) 2013-11-14 2013-11-14 Verfahren und Vorrichtung zur Herstellung von wasserdichten, gewellten Rohrleitungen aus Metallblech
HUE13005356A HUE030252T2 (en) 2013-11-14 2013-11-14 Method and apparatus for producing a watertight corrugated metal tube from a sheet metal sheet
PL13005356T PL2873470T3 (pl) 2013-11-14 2013-11-14 Sposób i urządzenie do wytwarzania wodoszczelnych, falistych rur metalowych z taśmy z blachy
RU2014139418/02A RU2598411C2 (ru) 2013-11-14 2014-09-29 Способ и устройство для изготовления водонепроницаемых гофрированных металлических труб из полосы металлического листа и водонепроницаемая гофрированная металлическая труба, изготовленная таким способом

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13005356.4A EP2873470B1 (de) 2013-11-14 2013-11-14 Verfahren und Vorrichtung zur Herstellung von wasserdichten, gewellten Rohrleitungen aus Metallblech

Publications (2)

Publication Number Publication Date
EP2873470A1 true EP2873470A1 (de) 2015-05-20
EP2873470B1 EP2873470B1 (de) 2016-07-27

Family

ID=49639693

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13005356.4A Not-in-force EP2873470B1 (de) 2013-11-14 2013-11-14 Verfahren und Vorrichtung zur Herstellung von wasserdichten, gewellten Rohrleitungen aus Metallblech

Country Status (4)

Country Link
EP (1) EP2873470B1 (de)
HU (1) HUE030252T2 (de)
PL (1) PL2873470T3 (de)
RU (1) RU2598411C2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2625311A (en) * 2022-12-13 2024-06-19 Sustainable Pipeline Systems Ltd Pipe bending head

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR996496A (fr) * 1949-10-03 1951-12-19 Procédé de fabrication de tubes et tubes obtenus par ce procédé
GB1080770A (en) * 1965-08-05 1967-08-23 Pacific Roller Die Company Inc Pipe making machine and method
US5720095A (en) * 1995-03-08 1998-02-24 Protol A.G. Method and apparatus for producing helically wound lock-seam tubing

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3546910A (en) * 1967-05-02 1970-12-15 Protol Sa Lock-seam helical tubing
SU472517A3 (ru) * 1968-06-06 1975-05-30 Кабель Унд Металл-Верке Аг (Фирма) Гибкий трубопровод
RU122596U1 (ru) * 2012-08-02 2012-12-10 Виталий Богданович Черногиль Труба спирально-шовная

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR996496A (fr) * 1949-10-03 1951-12-19 Procédé de fabrication de tubes et tubes obtenus par ce procédé
GB1080770A (en) * 1965-08-05 1967-08-23 Pacific Roller Die Company Inc Pipe making machine and method
US5720095A (en) * 1995-03-08 1998-02-24 Protol A.G. Method and apparatus for producing helically wound lock-seam tubing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2625311A (en) * 2022-12-13 2024-06-19 Sustainable Pipeline Systems Ltd Pipe bending head

Also Published As

Publication number Publication date
RU2598411C2 (ru) 2016-09-27
EP2873470B1 (de) 2016-07-27
HUE030252T2 (en) 2017-04-28
PL2873470T3 (pl) 2017-01-31
RU2014139418A (ru) 2016-04-20

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