EP0131466B1 - Radiales Aufweiten rohrförmiger Bauelemente - Google Patents

Radiales Aufweiten rohrförmiger Bauelemente Download PDF

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Publication number
EP0131466B1
EP0131466B1 EP84304696A EP84304696A EP0131466B1 EP 0131466 B1 EP0131466 B1 EP 0131466B1 EP 84304696 A EP84304696 A EP 84304696A EP 84304696 A EP84304696 A EP 84304696A EP 0131466 B1 EP0131466 B1 EP 0131466B1
Authority
EP
European Patent Office
Prior art keywords
tubular member
bladder
contact
tube
post
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
Application number
EP84304696A
Other languages
English (en)
French (fr)
Other versions
EP0131466A3 (en
EP0131466A2 (de
Inventor
David E. Merker
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.)
Babcock and Wilcox Co
Original Assignee
Babcock and Wilcox Co
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 Babcock and Wilcox Co filed Critical Babcock and Wilcox Co
Publication of EP0131466A2 publication Critical patent/EP0131466A2/de
Publication of EP0131466A3 publication Critical patent/EP0131466A3/en
Application granted granted Critical
Publication of EP0131466B1 publication Critical patent/EP0131466B1/de
Expired 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
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/06—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure by shock waves
    • B21D26/08—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure by shock waves generated by explosives, e.g. chemical explosives
    • 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
    • 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
    • B21D39/042—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 using explosives

Definitions

  • the present invention relates to apparatus for and methods of radially expanding tubular members into contact with tubes of nuclear vapour generators.
  • U.S. Patent No. US-A-4195 390 discloses apparatus for radially expanding a tubular member, concentrically located within a tube of a nuclear vapour generator and having an annular space therebetween, into contact with the tube, the apparatus comprising a first end cap, a second end cap spaced from the first end cap, a post rigidly connected between the end caps for connecting the end caps to each other, and an expandable bladder connected between the end caps and extending around the post, the bladder being of a flexible and resilient material and being capable of being radially expanded so as to expand the tubular member to effect contact between the tubular member and the tube and thereafter of contracting out of contact with the tubular member.
  • Hydraulic pressure is internally supplied to the bladder to expand the bladder and the tubular member.
  • hydraulic expansion is much too slow, particularly in a nuclear radiation environment.
  • external pressure sources are required, which adds to the time necessaryy in operating the apparatus disclosed in US-A-4 195 390.
  • U.S. Patent No. US-A-3 287 947 discloses a tube flaring technique utilising an explosive charge to outwardly flare the end of a tube.
  • U.S. Patent No. US-A-3 876 233 discloses an automatic pipe coupling device which uses a propellant for effecting a wedging action to move two parts with respect to each other.
  • apparatus for radially expanding a tubular member, concentrically located within a tube of a nuclear vapour generator and having an annular space therebetween, into contact with the tube, the apparatus comprising a first end cap, a second end cap spaced from the first end cap, a post rigidly connected between the end caps for connecting the end caps to each other, and an expandable bladder connected between the end caps and extending around the post, the bladder being of a flexible and resilient material and being capable of being radially expanded so as to expand the tubular member to effect contact between the tubular member and the tube and thereafter of contracting out of contact with the tubular member, wherein the bladder defines a closed space with the post, a propellant is contained within the closed space, ignition means is associated with the propellant for igniting the propellant so as explosively to generate gas within the closed space so as radially to rapidly expand the bladder so that the bladder comes into contact with the tubular member to expand the tubular member to effect contact between the tubular member and the tube, and means is provided
  • the invention also provides a method of radially expanding a tubular member into contact with the tube of a nuclear vapour generator, the method comprising locating the tubular member concentrically within the tube of the nuclear steam generator while maintaining an annular space therebetween, positioning in the tubular member an apparatus having spaced end caps fixed to each other by a post with an expandable bladder connected between the caps and around the post, the bladder being of a flexible and resilient material, and expanding the bladder so as thereby to expand the tubular member to effect contact between the tubular member and the tube, the bladder thereafter contracting out of contact with the tubular member, wherein the bladder defines a closed space with the post, a fast burning propellant, which upon ignition generates large quantities of gas, is provided in the closed space, the propellant is ignited to rapidly expand the bladder so that the bladder comes into contact with the tubular member to expand at least a portion of the tubular member into contact with the tube for subsequent brazing, and the generated gas is vented to permit contraction of the bladder out of contact with the tubular member.
  • the apparatus is preferably so designed that all of the set up work is done outside of the immediate repair area. This is particularly useful for nuclear radiation environments where exposure should be reduced to a minimum.
  • the propellant is ignited to radially expand the tubular member.
  • the propellant-actuated device can thus be utilized to expand repair tubing within a vapour generator tube of a nuclear-fuelled vapour generator.
  • a preferred apparatus and method embodying the invention and described hereinbelow are simple in design, rugged in construction, economical to manufacture and easy to implement.
  • the drawing shows apparatus 10 for radially expanding a tubular member 12 which, for example, may be repair tubing for a vapour generator tube 14 of a nuclear vapour generator (not shown).
  • the apparatus 10 comprises a first end cap 16, a second end cap 18 and a central post or tie rod 20 rigidly connected to both caps and holding them in a spaced relationship.
  • first end cap 16 would form a lower end cap and the second end cap 18 would form an upper end cap.
  • a flexible, resilient bladder 22 is fixedly connected between the caps 16 and 18 and extends around the post 20 to form a space 24, which is preferably annular.
  • a propellant is provided in the space 24 to partially or fully fill the space.
  • a positioning rod 30 may be fixed to the cap 16, for example by press fitting or by threading an end of the rod 30 into the bore 28. This facilitates the positioning of the apparatus 10 in the tubular member 12 at a desired position.
  • Ignition means is provided in the form of an electrical wire 32 and an ignitor 34.
  • the wire 32 may be supplied through a central bore of the rod 30, the bore 28 and the port 26.
  • Alternative known ignition means may also be provided, which may or may not require mechanical access to the space 24 through the port 26.
  • the end of the post 20 containing the port 26 is threaded into the bore 28 and the opposite end is threaded into a blind bore 36 of the cap 18.
  • the post 20 may include a flange 38 or may be surrounded by a separate ring 40 which bears against the inner surface of the bladder 22 adjacent its ends.
  • the caps 16 and 18 are provided with sleeve extensions 42 and 44, respectively, to support the outer end surfaces of the bladder 22.
  • the apparatus In operation, the apparatus is positioned as shown in Figure 1.
  • the gases may be vented, for example through the ignition port 26.
  • the bladder 22 collapses, as shown in Figure 3, and the apparatus 10 can then be removed.
  • the tubular member 12 is thus expanded in the vapour generator tube 14, in a rapid and secure manner, and with a minimum of on site exposure to nuclear radiation.
  • the present apparatus and method can expand a tubular member within 10 to 15 milliseconds, as opposed to a period of about 5 minutes as required by the hydraulic technique. This is particularly significant where a large number of vapour generator tubes must be repaired in an environment exposed to nuclear radiation.
  • Another advantage of the present method and apparatus is cleanliness. While this is not generally a problem for the hydraulic expansion technique, it can be a problem in other expansion techniques which require lubricants or produce undesirable or harmful waste products.
  • the propellant used with the present method and apparatus is totally contained within the bladder 22 and the generated gases can be vented to a location outside of the expansion area. Thus, there is no tube contamination, which would pose problems to subsequent brazing and could leave undesirable products within the tube or on the tube surface, possibly leading to future tube degradation.
  • a further advantage of the present method and apparatus over the prior art is that it requires far fewer auxiliaries.
  • a power supply need only be connected to the ignition wires.
  • the present method and apparatus do not require pumps, water supplies, piping, pressure recorders or electronic controls.
  • the present method and apparatus do not produce a damaged layer of material on the tube surface, thereby eliminating future corrosion problems which can result from such damage.
  • Exemplary materials for the bladder consist of polyurethane or similar substances having the requisite resiliency.
  • Exemplary materials for the propellant charge are smokeless gunpowders having the requisite burning rate.
  • Smokeless gunpowders usable in the present method and apparatus include the materials sold under the trademarks HI-SKOR and designated as 700-X by E. I. DuPont de Nemours & Co., Inc., and HERCULES 2400 by Hercules Incorporated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Pipe Accessories (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Air Bags (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Manipulator (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)

Claims (7)

1. Vorrichtung zum radialen Aufweiten eines rohrförmigen Körpers (12), der konzentrisch in einem Rohr (14) eines nuklearen Dampfgenerators angeordnet ist, wobei sich ein Ringraum zwischen diesen befindet, und zwar Aufweiten des Körpers in Berührung mit dem Rohr (14), mit einer ersten Endkappe (16), einer zweiten Endkappe (18), die von der ersten Endkappe (16) im Abstand angeordnet ist, einem Tragpfosten (20), der starr zwischen den Endkappen (16, 18) für die Verbindung der Endkappen miteinander verbunden ist, und einem aufweitbaren blasenförmigen Gegenstand bzw. Hohlraum (22), der zwischen den Endkappen (16, 18) verbunden ist und sich um den Tragpfosten (20) herum erstreckt, wobei der Hohlraum (22) aus einem flexiblen und elastischen Material besteht und in der Lage ist, radial aufgeweitet zu werden, um den rohrförmigen Körper (12) aufzuweiten und eine Berührung zwischen dem rohrförmigen Körper (12) und dem Rohr (14) zu bewirken, und sich danach außer Berührung mit dem rohrförmigen Körper (12) zusammenzieht, dadurch gekennzeichnet, daß der Hohlraum (22) mit dem Tragpfosten (20) einen geschlossenen Raum (24) bildet, ein Treibmittel in dem geschlossenen Raum (24) enthalten ist, Zündmittel (32, 34) dem Treibmittel zugeordnet sind zum Zünden des Treibmittels und explosivartigen Erzeugen von Gas in dem geschlossenen Raum (24), um schnell den Hohlraum (22) radial aufzuweiten, so daß der Hohlraum in Berührung mit dem rohrförmigen Körper (12) kommt, um den rohrförmigen Körper aufzuweiten und eine Berührung zwischen dem rohrförmigen Körper und dem Rohr (14) zu bewirken, und daß ein Mittel (26) vorgesehen ist zum Entlüften des durch Explosion erzeugten Gases und Schaffung der Möglichkeit, daß sich der Hohlraum (22) außer Berührung mit dem rohrförmigen Körper (12) zusammenzieht.
2. Vorrichtung nach Anspruch 1, wobei der Hohlraum (22) Polyurethan aufweist.
3. Vorrichtung nach Anspruch 1 oder Anspruch 2, wobei der Tragpfosten (20) ein Flanschmittel (38, 40) aufweist, welches in dem Raum (24) neben den Kappen (16, 18) angeordnet ist, wobei die Kappen (16, 18) Hülsenteile (42, 44) haben, welche das Flanschmittel (38, 40) umgeben, und Endteile des Hohlraumes (22) zwischen den Hülsen und dem Flanschmittel angebracht sind.
4. Vorrichtung nach Anspruch 1, Anspruch 2 oder Anspruch 3, wobei die erste Kappe (16) eine Bohrung (28) aufweist, welche sich durch die Kappe erstreckt, der Tragpfosten (20) in der Bohrung (28) angebracht ist und ein Zündtor (26) hat, welches die Bohrung (28) mit dem Raum (24) verbindet.
5. Vorrichtung nach Anspruch 1, Anspruch 2 oder Anspruch 3, wobei eine Positionierstange (30) fest mit der ersten Kappe (16) in Eingriff steht, in der Stange (30) eine Längsbohrung angeordnet ist, das Zündmittel ein Paar von Leitungen (32) aufweist, welche sich durch die Längsbohrung erstrecken, in dem Tragpfosten (20) ein Zündtor (26) angeordnet ist, welches eine Bohrung (28) der ersten Kappe (16) mit dem Raum (24) verbindet, das Leitungspaar (32) durch das Zündtor (26) zu dem Raum (24) sich fortsetzt und das Zündmittel ferner einen Zünder (34) aufweist, welcher mit den Leitungen (32) verbunden ist.
6. Vorrichtung nach einem der vorhergehenden Ansprüche, wobei das Treibmittel ein rauchloses Schießpulver ist.
7. Verfahren zum radialen Aufweiten eines rohrförmigen Körpers (12) in Berührung mit einem Rohr (14) eines nuklearen Dampfgenerators, bei dem der rohrförmige Körper (12) konzentrisch in dem Rohr (14) des nuklearen Dampfgenerators angeordnet wird, während ein Ringraum dazwischen gehalten wird, in dem rohrförmigen Körper (12) eine Vorrichtung (10) angeordnet wird, die im Abstand angeordnete Endkappen (16, 18) aufweist, die durch einen Tragpfosten (20) aneinander befestigt sind mit einem aufweitbaren Hohlraum (20), der um den Tragpfosten herum zwischhen den Kappen verbunden ist, wobei der Hohlraum (22) aus einem flexiblen und federnden Material besteht, und der Hohlraum (22) aufgeweitet wird, um dadurch den rohrförmigen Körper (12) aufzuweiten und eine Berührung zwischen dem rohrförmigen Körper (12) und dem Rohr (14) zu bewirken, wonach der Hohlraum (22) sich aus dem Kontakt mit dem rohrförmigen Körper (12) zusammenzieht, dadurch gekennzeichnet, daß der Hohlraum (22) mit dem Tragpfosten (20) einen geschlossenen Raum (24) bildet, ein schnell brennendes Treibmittel, welches nach dem Zünden eine große Gasmenge erzeugt, in dem geschlossenen Raum (24) vorgesehen wird, das Treibmittel gezündet wird, um den Hohlraum (22) schnell aufzuweiten, so daß der Hohlraum mit dem rohrförmigen Körper (12) in Berührung kommt, um mindestens ein Teil des rohrförmigen Körpers (12) in Kontakt mit dem Rohr (14) für ein nachfolgendes Hartlöten aufzuweiten, und das erzeugte Gas entlüftet wird, um eine Kontraktion des Hohlraumes (22) außer Berührung mit dem rohrförmigen Körper (12) zu ermöglichen.
EP84304696A 1983-07-11 1984-07-10 Radiales Aufweiten rohrförmiger Bauelemente Expired EP0131466B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US51227683A 1983-07-11 1983-07-11
US512276 1983-07-11

Publications (3)

Publication Number Publication Date
EP0131466A2 EP0131466A2 (de) 1985-01-16
EP0131466A3 EP0131466A3 (en) 1985-07-31
EP0131466B1 true EP0131466B1 (de) 1988-06-08

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ID=24038426

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84304696A Expired EP0131466B1 (de) 1983-07-11 1984-07-10 Radiales Aufweiten rohrförmiger Bauelemente

Country Status (6)

Country Link
EP (1) EP0131466B1 (de)
JP (1) JPS6086397A (de)
KR (1) KR910007127B1 (de)
CA (1) CA1224394A (de)
DE (1) DE3471893D1 (de)
ES (1) ES8703991A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09186220A (ja) * 1995-11-27 1997-07-15 Tokyo Electron Ltd 搬送装置及び搬送方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3287947A (en) * 1964-01-03 1966-11-29 Charles E Frantz Explosion apparatus for flanging a tube
BE756406A (fr) * 1969-09-23 1971-03-22 Sulzer Ag Procede de fixation d'un tube dans une plaque perforee par ondes de pression produites par explosion et disposition pour la miseen oeuvre de ce procede
US3751954A (en) * 1971-06-01 1973-08-14 Denver Research Ins Method and apparatus for explosive autofrettage
US3876233A (en) * 1973-05-31 1975-04-08 Amp Inc Toolless automatic pipe-coupling device
US4028789A (en) * 1976-03-29 1977-06-14 Westinghouse Electric Corporation Method of installing a sleeve in one end of a tube
US4195390A (en) * 1977-01-03 1980-04-01 Scientific Technologies, Inc. Apparatus and method for manipulation and sleeving of tubular members
GB2100386B (en) * 1981-04-27 1985-02-06 Foster Wheeler Power Prod Plugging tubes

Also Published As

Publication number Publication date
EP0131466A3 (en) 1985-07-31
DE3471893D1 (en) 1988-07-14
ES8703991A1 (es) 1987-03-01
CA1224394A (en) 1987-07-21
KR850001391A (ko) 1985-03-18
ES534166A0 (es) 1987-03-01
KR910007127B1 (ko) 1991-09-18
JPH026440B2 (de) 1990-02-09
EP0131466A2 (de) 1985-01-16
JPS6086397A (ja) 1985-05-15

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