EP0516179B1 - Dispositif pour l'expansion et l'obturation d'une douille dans un tube entourant - Google Patents

Dispositif pour l'expansion et l'obturation d'une douille dans un tube entourant Download PDF

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Publication number
EP0516179B1
EP0516179B1 EP19920111095 EP92111095A EP0516179B1 EP 0516179 B1 EP0516179 B1 EP 0516179B1 EP 19920111095 EP19920111095 EP 19920111095 EP 92111095 A EP92111095 A EP 92111095A EP 0516179 B1 EP0516179 B1 EP 0516179B1
Authority
EP
European Patent Office
Prior art keywords
tool
housing
sleeve
tube
ring
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
EP19920111095
Other languages
German (de)
English (en)
Other versions
EP0516179A3 (en
EP0516179A2 (fr
Inventor
George B. Rabe
Robert Harold Johnson
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.)
Foster Wheeler Energy Corp
Original Assignee
Foster Wheeler Energy Corp
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
Priority claimed from US07/100,654 external-priority patent/US4779333A/en
Priority claimed from US07/100,690 external-priority patent/US4779445A/en
Application filed by Foster Wheeler Energy Corp filed Critical Foster Wheeler Energy Corp
Publication of EP0516179A2 publication Critical patent/EP0516179A2/fr
Publication of EP0516179A3 publication Critical patent/EP0516179A3/en
Application granted granted Critical
Publication of EP0516179B1 publication Critical patent/EP0516179B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • B21D39/06—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes in openings, e.g. rolling-in
    • 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
    • B21D39/08—Tube expanders
    • B21D39/20—Tube expanders with mandrels, e.g. expandable
    • 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
    • B21D39/08—Tube expanders
    • B21D39/20—Tube expanders with mandrels, e.g. expandable
    • B21D39/203—Tube expanders with mandrels, e.g. expandable expandable by fluid or elastic material
    • 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
    • B21D39/08—Tube expanders
    • B21D39/20—Tube expanders with mandrels, e.g. expandable
    • B21D39/203—Tube expanders with mandrels, e.g. expandable expandable by fluid or elastic material
    • B21D39/206—Tube expanders with mandrels, e.g. expandable expandable by fluid or elastic material by axially compressing the elastic material

Definitions

  • This invention pertains to apparatus for expanding and sealing a tubular sleeve into a surrounding tube.
  • Tubes used in tubular type heat exchangers particularly tubes in air preheaters used in fossil fuel fired steam power plants for preheating the combustion air against hot flue gases, often develop leaks after several years service due to metal corrosion, erosion or fatigue and require repair or replacement. Such tube leaks are usually located near the tube plate, but can occur anywhere along the tubes. Because replacement of tubes in such heat exchangers is quite expensive, particularly for large heat exchangers containing 10,000-50,000 tubes, and requires considerable outage time for a plant, a method and special tool devices for reliably repairing such tubes quickly and inexpensively in a dusty environment has been needed.
  • U.S.-A-2,319,216 to Dewald discloses a pull-type tapered tube expander for expanding heat exchanger tubes into a tubesheet utilizing direct contact between a tapered wedge surface and the tube inner wall.
  • U.S.-A-4,182,152 to Vaill et al discloses a grid sleeve bulge tool used for securing internal guide tubes to an outer sleeve and grid.
  • U.S.-A-4,471,643 to Champoux et al discloses a tool adapted for pulling a tapered mandrel through a sleeve to secure together abutting workpieces.
  • U.S.-A-4,068,372 to Kamohara et al discloses a tube expander for anchoring tubes in a tube plate of a heat exchanger, and utilizes a cylindrical shaped elastic medium to be expanded by axial compression utilizing a rod inserted through the medium and back up rings.
  • U.S.-A-4,387,507 to Kelly discloses apparatus according to the pre-characterising part of claim 1 and method for radially expanding tubes for anchoring within a tubesheet by using primary and secondary expander rings.
  • U.S.-A-4,418,457 to Mueller discloses another apparatus for expanding a tube into a tubesheet opening and for controlling the tube expansion by axial location of elastomer washers relative to the tubesheet.
  • U.S.-A-4,456,631 to Kelly discloses another apparatus for expanding tubes into tubesheets using a plurality of elastomer expander rings loaded by axial compression.
  • the known prior art has various deficiencies, and evidently does not disclose a pressurizable tool device adapted for conveniently and rapidly expanding a close-fitting metal sleeve firmly against a tube in a tubeplate, and which can withstand repeated cycles of use and can also be easily withdrawn from the expanded sleeve.
  • U.S.-A-4069573 describes a device for expanding a repair sleeve against a tube comprising a single annular elastomeric plug which is axially compressed between a fixed and a movable stop to cause radial expansion thereof.
  • the present invention provides a pressurizable tool adapted for expanding a sleeve into a surrounding tube in a tubesheet, comprising a housing having a cylindrical axial bore, and containing a front port connected to the bore a piston axially movable within the housing bore and attached at its forward end to an elongated rod, the rod having a retainer nut attached on to its forward end, an elastic expander unit encircling the rod, the expander unit containing a plurality of elastomer rings and being positioned between the housing and the retainer nut, and a closure plate having a forward portion inserted into the cylindrical bore, pressurisation of the housing front port moving the piston rearwardly in the housing and axially compressing the expander unit against the housing so as to expand the expander unit firmly radially against the sleeve and expand the sleeve tightly against the tube in the tubesheet, characterised in that the closure plate contains a rear port connected to the bore, the retainer nut is threadably attached to
  • the tool is capable of effectively repairing leaking tubes in heat exchangers and is particularly suitable for use at the rear end of the sleeve.
  • the tool device is adapted for being inserted into the close-fitting metal sleeve within the tube for radially expanding the sleeve into the tubesheet to provide a pressure-tight seal therebetween.
  • the tool utilizes elastomer expander rings which are each contoured to include a chamfer at the outer corners of the forward and rear faces of the seal ring unit to provide efficient radial expansion without undesirable extrusion and achieve long useful life for the rings.
  • Such effective tube repair avoids expensive rebuilding or replacement of heat exchanges, such as air preheaters in fuel fired steam power plants.
  • the tool includes a housing having a cylindrical longitudinal bore and containing a front pressurizable port connected to the bore, and a housing closure plate containing a rear pressurizable port.
  • a housing adapter flange having a reduced diameter portion sized to fit within the tube end is provided at the forward end of the housing to facilitate locating the tool relative to the sleeve and tubesheet.
  • the housing cylindrical bore contains a piston axially movable therein, which piston is attached at its forward end to an elongated rod having an adjustable retainer nut threadably attached thereon.
  • An elastic expander unit comprising at least two elastic expander rings or washers is provided encircling the rod between the housing flange and the adjustable retaining nut.
  • the front and rear expander rings each have a chamfer provided at the front outer corner of the front ring and the rear outer corner of the rear ring adjacent the retainer nut and housing flange, respectively, to minimize radial outward extrusion of each ring during repeated pressurization cycles during use of the tool.
  • the expander rings are composed of an elastic elastomer material which retains its elasticity through many high compression and depressurization cycles during use of the tool.
  • Useful ring materials include polyurethane, nylon, Teflon (Trade Mark) and synthetic rubber, with polyurethane elastomer being preferred because of its desirable high pressure characteristics.
  • the apparatus of this invention may be used for expanding an end, particularly the rear end, of a close-fitting metal sleeve firmly into the tube into the tubeplate or tubesheet such as in a heat exchanger, to provide a pressure-tight interference fit between the sleeve outer surface and the tube inner surface.
  • the tool forward end is first inserted into the elongated metal sleeve which is positioned within the near end of a tube in a heat exchanger.
  • the tool forward end including the retainer nut, elastic expander ring unit, and housing adapter flange forward portion are inserted fully into the sleeve, after which the housing front port is pressurized so as to move the piston rearwardly and axially compress the elastic expander rings and thereby expand them radially outwardly against the sleeve.
  • Such expansion also expands the rear end portion of the metal sleeve radially outwardly firmly against the inner surface of the tube, which is already sealed pressure-tight within the tubesheet.
  • the resulting joint made by the tool forms a rear pressure-tight seal between the sleeve and the damaged tube, which was previously pressure-tightly rolled into the tubesheet opening during original manufacture of the heat exchanger.
  • the housing forward port is depressurized and the rear port is pressurized so as to move the retainer nut forward and release the axial pressure on the elastic rings.
  • the tool is then withdrawn from the expanded sleeve and tube, and is inserted into another sleeved tube where the procedure is repeated as desired.
  • a vertical tubular heat exchanger 110 has a plurality of tubes 112 with their lower ends being expanded tightly into a lower tubesheet 113.
  • Tube ruptures 112a in some of tubes 112 are to be repaired by inserting a sleeve 114 into each damaged tube and locally expanding the sleeve outer surface against the inner wall of tube adjacent the tubesheet 113, so as to provide a pressure-tight seal at the lower end of the tube 112, as shown in greater detail by Figure 1A.
  • Such tube repair is provided by inserting a special tool 120 into the sleeve and radially expanding the sleeve 114 against the tube 112.
  • the pressurizable tool device 120 includes a housing 122 having a cylindrical longitudinal bore 123 and containing a pressurizable front port 124 connected to the bore.
  • Housing 122 encloses a piston 126 axially movable in bore 123 and containing an outer seal ring 125.
  • the housing 122 rear end is closed by a head plate 128, which has a forward portion 128a inserted into bore 123 and is attached to housing 122 by a plurality of bolts 128b and is pressure-sealed to the housing bore 123 by outer seal ring 127.
  • Head plate 128 is pressure-sealed around a rear extension portion 126a of the piston 126 by inner seal ring 129, and contains pressurizable rear port 138 flow connected to bore 123.
  • the piston 126 forward end is threadably attached 126b to an elongated rod 130, which is pressure-sealed to housing 122 by O-ring 131.
  • Rod 130 forward portion 130a has a reduced diameter and extends through an adapter flange 132, which is removably attached to the front face of the housing 122 by a plurality of threaded screws 133.
  • Adapter flange 132 includes a front portion 132a having a reduced diameter which is sized to fit within a tube 112 into which a close-fitting sleeve 114 is to be expanded, so as to contact the rear end of the sleeve 114 and axially locate the sleeve relative to the tube 112 and tubesheet 113.
  • Threadably attached to the forward end 130a of rod 130 is a retainer nut 134, which may be tapered to facilitate inserting the nut and tool into a tube and sleeve 114.
  • an expander unit 136 Located between the adapter flange front portion 132a and nut 134 is an expander unit 136 containing 2-4 contoured elastic expander rings 136a, 136b, etc.
  • the rings are made of an elastic material which is capable of withstanding repeated high compression loading without causing permanent deformation of the rings.
  • Useful elastic materials for rings 136 include polyurethane, nylon, Teflon (Trade Mark), and synthetic rubber, with polyurethane elastomers being preferred because of its desirable elasticity characteristics and being able to withstand numerous use cycles without permanent deformation
  • Polyurethane elastomer has desirable characteristics of being substantially solid under normal unpressurized conditions and having similar to a hydraulic liquid when highly pressurized.
  • Polyurethane elastomer also has a memory characteristic of being able to return to substantially its original shape after a high compressive pressure has been removed.
  • a suitable preferred material is polyurethane elastomer XPE-10 obtainable from Polaroid Corporation.
  • the expander ring unit 136 is preferably provided as two annular rings or washers 136a and 136b which preferably have equal thickness.
  • a chamfer 137 is provided at the forward outer corner of edge of front ring 136a and at the rear outer corner or edge of rear ring 136b, and serve to retard or prevent permanent enlargement of the ring at that location due to the repeated axial loadings and high compression required for the rings during use.
  • the chamfer 137 has an angle a of 30 to 60 degrees with the face of the ring, and has a radial dimension d equal to 20 to 30% of the radius of the ring, as shown in Figure 4.
  • This tool device front extension portion is made to have a diameter slightly smaller than the sleeve for easy insertion into the rear end of the sleeve provided within a tube in a tubesheet.
  • the tool extension portion length is made sufficient to extend past the tubesheet thickness and locate the expander rings unit 136 within the tubesheet thickness.
  • the tool expander ring outside diameter is usually 1.0-2.0 inches (2.5-5.0 cm), and fits snugly within a sleeve 114 of a tube 112, and the tool forward portion length is usually 6-12 inches (15.0-30.0 cm) depending upon the tubesheet thickness.
  • the tool is suitably made of high strength alloy steel.
  • the tool forward end portion is first inserted into sleeve 114 provided in a tube 112 within a tubesheet, as shown in Figures 1 and 2.
  • the front face of adapter flange 132 is usually placed against the exposed end of tube 12 and the front flange extension portion 132a is usually positioned substantially in alignment with the front face of tubesheet 113.
  • the tool is connected by suitable hoses to a hydraulic pressurizing unit (not shown).
  • the housing front port 124 is then pressurized such as to about 2000 psig (14 x 106 N/m2) hydraulic pressure, so as to move the piston 126 rearwardly and axially compress the elastic expander ring unit 136, thereby radially expanding the sleeve 114 pressure-tightly against the tube 112, as is shown by Figure 3.
  • the tool housing front port 124 is depressurized and the rear port 138 is pressurized, which moved forward the piston 126 and the retainer nut 134 so as to release the axial loading pressure on expander ring unit 136.
  • the tool device 120 can now be easily withdrawn from the tube, and inserted into another tube for further cycles of use for sleeve expansion into tubes. It has been found that the front expander ring 136a loses its resiliency first because of its loading and higher compression and greater deformation and is replaced after about 20-30 cycles of use. After another 20-30 cycles of use, both rings 136a and 136b are replaced with new expander rings by removing retainer nut 134.
  • a sleeve to tubesheet expander tool device is constructed and used for expanding and tightly sealing a sleeve rear end into a tube in a tubesheet of heat exchanger.
  • the tool device and heat exchanger have the following typical dimensions and characteristics:- Tube inside diameter, in (cm) 1.834 (4.658) Sleeve outside diameter, in (cm) 1.800 (4.572) Sleeve inside diameter, in (cm) 1.634 (4.150) Tool length, in (cm) 8 (20) Tool housing outside diameter, in (cm) 4 (10) Piston diameter, in (cm) 3.25 (8.26) Expander rings outside diameter, in (cm) 1.625 (4.128) Expander ring length, in (cm) (Each of two rings) 0.50 (1.27) Piston operating pressure, psig (N/m2) 2000 (14 x 106)
  • the tool forward extension portion is first inserted into a metal sleeve provided in a tube of the heat exchanger, so that the expander rings are positioned in lateral alignment with the tubesheet of the heat exchanger.
  • the tool front port is pressurized to 2000 psig (14 x 106 N/m2) by a suitable hydraulic pressurizing unit connected to the tool, which drives the piston rearwardly and compresses and expands the expander rings and swages the metal sleeve radially outwardly against the tube within the tube sheet.
  • the tool housing front port is depressurized and the rear port is pressurized to 2000 psig (14 x 106 N/m2), which moves forward the piston to release the axial force on the expander rings and permits the tool device to be withdrawn from the sleeve and tube. This procedure is repeated for each tube repaired.
  • the tool device is particularly suitable for the expansion of the lower or rear end of a sleeve. It will be appreciated, however, that it may be employed equally successfully to expand the inner or forward end of the sleeve. However, another tool device having a collet with multiple radially expandable fingers may be used for this purpose, the two tool devices being used in conjunction to seal both ends of a repair sleeve to a tube as is described in co-pending European Patent Application EP-A-0309078.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pipe Accessories (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Claims (9)

  1. Outil pressurisable (120) adapté pour écarter un manchon (114) dans un tube qui l'entoure (112) dans une plaque tubulaire (113), comprenant un logement (122) ayant un alésage axial cylindrique (123), et contenant un orifice antérieur (124) relié à l'alésage (123), un piston (126) mobile axialement à l'intérieur du logement (123) et fixé à son extrémité avant à une tige allongée (130), la tige (130) ayant un écrou de retenue (134) fixé à son extrémité antérieure, une unité écarteuse élastique entourant la tige, l'unité écarteuse contenant une pluralité d'anneaux en élastomère (136a, 136b) et étant positionnée entre le logement (122) et l'écrou de retenue (134), et une plaque de fermeture (128) ayant une partie avant (128a) insérée dans l'alésage cylindrique (123), la pressurisation de l'orifice antérieur (124) déplaçant le piston (126) en arrière dans le logement et compressant axialement l'unité écarteuse (136) contre le logement (122) de manière à écarter fermement l'unité écarteuse radialement contre le manchon et à écarter le manchon (114) étroitement contre le tube (112) dans la plaque tubulaire (113), caractérisé en ce que la plaque de fermeture (128) contient un orifice arrière (138) relié à l'alésage (123), en ce que l'écrou de retenue (134) est vissé à l'extrémité avant de la tige (130), et en ce qu'un chanfrein (137) est prévu au bord extérieur des faces avant et arrière de l'unité écarteuse, le chanfrein (137) s'étendant du bord extérieur vers le centre de l'anneau (136a, 136b) formant la face d'extrémité sur une distance radiale égale à 15 à 30% de l'épaisseur radiale de l'anneau.
  2. Outil selon Revendication 1, dans lequel la plaque de fermeture (128) est fixée au logement (122) par une pluralité de boulons de fixation (128b) et son étanchéité à la pression avec le logement (122) et le piston (126) est assurée par des joints toriques extérieur et intérieur (127, 129).
  3. Outil selon Revendication 1 ou Revendication 2 dans lequel le piston (126) a une saillie arrière (126a) qui dépasse à travers la plaque de fermeture (128) avec laquelle il est étanche à la pression.
  4. Outil selon l'une quelconque des revendications précédentes dans lequel le logement (122) a une partie antérieure de diamètre réduit pour s'adapter dans le tube (112) et contacter une extrémité arrière du manchon (114).
  5. Outil selon l'une quelconque des revendications précédentes dans lequel une bride adaptatrice (132) est fixée rigidement à l'extrémité avant du logement, la bride (132) ayant une partie avant (132a) adaptée pour se loger à l'intérieur d'un tube (112) et contacter une extrémité du manchon (114).
  6. Outil selon l'une quelconque des revendications précédentes dans lequel l'unité écarteuse (136) est constituée de deux anneaux (136a, 136b) d'épaisseur égale.
  7. Outil selon l'une quelconque des revendications précédentes dans lequel les anneaux de l'unité écarteuse (136a, 136b) sont constitués d'élastomère de polyuréthanne.
  8. Outil selon l'une quelconque des revendications précédentes dans lequel le chanfrein (137) fait un angle de 30 à 60° avec la face d'extrémité de l'anneau (136a, 136b).
  9. Outil selon l'une quelconque des revendications précédentes dans lequel le chanfrein (137) s'étend du bord extérieur vers le centre de l'anneau (136a, 136b) formant la face d'extrémité sur une distance radiale égale à 20 à 30% de l'épaisseur radiale de l'anneau (136a, 136b).
EP19920111095 1987-09-24 1988-07-22 Dispositif pour l'expansion et l'obturation d'une douille dans un tube entourant Expired - Lifetime EP0516179B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US100654 1987-09-24
US100690 1987-09-24
US07/100,654 US4779333A (en) 1987-09-24 1987-09-24 Sleeve to tubesheet expander tool
US07/100,690 US4779445A (en) 1987-09-24 1987-09-24 Sleeve to tube expander device
EP19880306743 EP0309078A3 (fr) 1987-09-24 1988-07-22 Procédé et appareil pour dilater ou sceller un manchon placé dans un tube

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP19880306743 Division EP0309078A3 (fr) 1987-09-24 1988-07-22 Procédé et appareil pour dilater ou sceller un manchon placé dans un tube
EP88306743.1 Division 1988-07-22

Publications (3)

Publication Number Publication Date
EP0516179A2 EP0516179A2 (fr) 1992-12-02
EP0516179A3 EP0516179A3 (en) 1993-04-07
EP0516179B1 true EP0516179B1 (fr) 1995-04-19

Family

ID=26797403

Family Applications (2)

Application Number Title Priority Date Filing Date
EP19920111095 Expired - Lifetime EP0516179B1 (fr) 1987-09-24 1988-07-22 Dispositif pour l'expansion et l'obturation d'une douille dans un tube entourant
EP19880306743 Withdrawn EP0309078A3 (fr) 1987-09-24 1988-07-22 Procédé et appareil pour dilater ou sceller un manchon placé dans un tube

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP19880306743 Withdrawn EP0309078A3 (fr) 1987-09-24 1988-07-22 Procédé et appareil pour dilater ou sceller un manchon placé dans un tube

Country Status (5)

Country Link
EP (2) EP0516179B1 (fr)
JP (1) JPH01118323A (fr)
AU (1) AU620814B2 (fr)
CA (1) CA1326128C (fr)
ES (1) ES2071387T3 (fr)

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JPH0480622U (fr) * 1990-11-21 1992-07-14
FR2701658B1 (fr) * 1993-02-19 1995-05-12 Trouvay Cauvin Sa Appareil pour sertir un tube dans une plaque épaisse.
DE10031902B4 (de) * 2000-06-30 2005-06-16 Daimlerchrysler Ag Überlastsicherung und ein Verfahren zu deren Herstellung
US7597703B2 (en) 2004-09-07 2009-10-06 Medtronic Vascular, Inc. Mechanically expandable occluder
SE0501053L (sv) * 2005-05-10 2006-05-16 Kvaerner Power Ab Insatstub samt ett system av insatstuber
KR101014455B1 (ko) * 2008-12-05 2011-02-14 현대자동차주식회사 소재의 가공홀 밀폐장치
CN105221888B (zh) * 2015-10-23 2017-05-24 哈尔滨工程大学 一种海底管道伸缩内胀式封堵器
CN107052175B (zh) * 2017-04-28 2019-08-06 西北有色金属研究院 一种钛及钛合金热推制扩管成型用芯模
CN110549291A (zh) * 2019-08-01 2019-12-10 中国第一重型机械集团大连加氢反应器制造有限公司 一种气动涨紧式导引头

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US4006619A (en) * 1975-08-07 1977-02-08 James Hilbert Anderson Tube expander utilizing hydraulically actuated pistons
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US4654943A (en) * 1986-02-24 1987-04-07 Foster Wheeler Energy Corporation Tube positioning tool and method for use
US4694677A (en) * 1986-02-24 1987-09-22 Foster Wheeler Energy Corporation Elongated tube expander tool

Also Published As

Publication number Publication date
EP0516179A3 (en) 1993-04-07
JPH0470098B2 (fr) 1992-11-10
EP0309078A3 (fr) 1990-10-24
JPH01118323A (ja) 1989-05-10
AU620814B2 (en) 1992-02-27
CA1326128C (fr) 1994-01-18
ES2071387T3 (es) 1995-06-16
AU2025688A (en) 1989-04-06
EP0516179A2 (fr) 1992-12-02
EP0309078A2 (fr) 1989-03-29

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