EP0341429B1 - Einrichtung zum Einbringen einer Hülse in ein Rohr eines Dampferzeugers - Google Patents

Einrichtung zum Einbringen einer Hülse in ein Rohr eines Dampferzeugers Download PDF

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Publication number
EP0341429B1
EP0341429B1 EP89106233A EP89106233A EP0341429B1 EP 0341429 B1 EP0341429 B1 EP 0341429B1 EP 89106233 A EP89106233 A EP 89106233A EP 89106233 A EP89106233 A EP 89106233A EP 0341429 B1 EP0341429 B1 EP 0341429B1
Authority
EP
European Patent Office
Prior art keywords
sleeve
spreading
face
tube sheet
bolt
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
EP89106233A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0341429A1 (de
Inventor
Alban Dietrich
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.)
ABB Reaktor GmbH
Original Assignee
ABB Reaktor GmbH
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 ABB Reaktor GmbH filed Critical ABB Reaktor GmbH
Publication of EP0341429A1 publication Critical patent/EP0341429A1/de
Application granted granted Critical
Publication of EP0341429B1 publication Critical patent/EP0341429B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/002—Component parts or details of steam boilers specially adapted for nuclear steam generators, e.g. maintenance, repairing or inspecting equipment not otherwise provided for
    • F22B37/003—Maintenance, repairing or inspecting equipment positioned in or via the headers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F11/00—Arrangements for sealing leaky tubes and conduits
    • F28F11/02—Arrangements for sealing leaky tubes and conduits using obturating elements, e.g. washers, inserted and operated independently of each other
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49352—Repairing, converting, servicing or salvaging
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49718—Repairing
    • Y10T29/49732—Repairing by attaching repair preform, e.g., remaking, restoring, or patching
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53113—Heat exchanger

Definitions

  • the invention relates to a device for inserting a sleeve into a tube of a steam generator, which ends in a tube sheet, with a holding device movable in the axial direction of the steam generator, which transfers the sleeve in partial strokes to a stationary holding device assigned to the tube sheet, which in a relative to the tube sheet fixed holding plate is integrated, the sleeve being clamped in a passage of the holding plate arranged coaxially to the tube during the return stroke of the holding device movable in the axial direction of the steam generator.
  • the task therefore is to ensure that the sleeve is centered when it is inserted into the steam generator tube and to achieve an exact positioning of the sleeve's installation position.
  • the bushing is formed by a switching sleeve which is resiliently supported in the axial direction, in that a handle is connected to a centering piece which is variable in outer diameter, in that the sleeve is clamped between a shoulder of the handle and an end face of the centering piece, wherein the diameter of the outer edge of the shoulder is smaller than the inner diameter of the switching sleeve, that the handle is assigned a further shoulder, the axial distance from the first shoulder by the height of the switching sleeve is further away from the tube sheet than the first shoulder and the shoulder surface on one End face of the switching sleeve facing away from the tube sheet comes into contact, while an end face of the switching sleeve facing the tube sheet contacts the same.
  • a pull rod connecting these parts extends through the sleeve and a widening device between the centering piece and the handle for establishing a connection between the outer sleeve and the inner tube wall after the sleeve has been positioned.
  • the pull rod can also be used for another function.
  • the switching sleeve is guided in a socket assigned to the holding plate, into which recesses for receiving springs are made from its end face facing the holding plate.
  • the switching sleeve is supported on a flange associated with it on the springs projecting beyond the end face of the bush.
  • the holding device assigned to the tube sheet has a clamping piece which can be moved approximately perpendicular to the axis of the switching sleeve, that the clamping piece has been inserted into the jacket of the bushing or the switching sleeve Recess penetrates and the sleeve is clamped by pressing against the inner wall of the switching sleeve opposite the recess.
  • the recess associated with the switching sleeve wall must be dimensioned so large in its axial extent that passage of the switching sleeve with the clamping piece is possible along the entire spring travel.
  • the centering piece preferably consists of an expansion bolt which can be connected to the pull rod, an expansion sleeve which overlaps the expansion bolt and a threaded sleeve which partially overlaps the expansion bolt and the expansion sleeve and is connected to the expansion bolt at its end facing away from the pull rod, the expansion bolt penetrating an elongated hole transversely to its axis is which is penetrated by a locking bolt fixed in the expansion sleeve, the locking bolt with a spring-loaded ball protruding beyond the outer diameter of the expansion sleeve and can be snapped into an inner groove of the threaded sleeve, and in this position the end face of the expansion sleeve against an end face of the sleeve for contact is coming.
  • a centering sleeve constructed in this way, both the centering of the sleeve and the removal of the centering piece can be carried out reliably after the sleeve has been fixed relative to the steam generator tube.
  • the end of the expanding bolt which carries the threaded sleeve has a center bore which is a connection to the elongated hole, whereby a plunger can be inserted through this bore, which is connected before the expansion bolt is connected moves the locking bolt with the pull rod until it snaps into the inner groove of the threaded sleeve.
  • the locking between the threaded sleeve and the expanding sleeve can be released, the outer diameter of the centering piece being traceable to a dimension that permits movement of the centering piece through the sleeve .
  • the downsizing movement of the outer diameter of the centering piece is supported by a beveling of the expansion sleeve on its end face, possibly in cooperation with a beveling of the sleeve end face.
  • FIGS. 1 to 3 A device according to the invention is described using an exemplary embodiment and FIGS. 1 to 3.
  • FIG. 1 shows a tube sheet 1 of a steam generator 2 in which a plurality of tubes 3 end, of which only a few are shown for reasons of clarity.
  • This steam generator chamber 5 is accessible via a manhole 6, through which a device for inserting a sleeve 7 into a leaky tube 3 is also introduced.
  • Such leaks often occur in the area of the tube sheet 1 or just above this tube sheet.
  • One in such a broken tube introduced sleeve 7 overlaps the leakage point of the tube 3 and is sealingly connected to the same.
  • the device shown only schematically in FIG. 1 consists of a holding plate 8, which is fixed with the aid of clamping elements 9 relative to the tube sheet 1.
  • the holding plate 8 carries a drive unit 10 which receives a holding device 12 for the sleeve 7 which can be moved in the axial direction 11 of the steam generator 2.
  • the drive unit 10 can be designed as a medium-controlled cylinder, as a spindle drive or the like.
  • a stationary holding device 13 is also integrated, which holds the sleeve 7 in the stroke-wise retraction until the holding device 12, which is movable in the axial direction, has carried out its return stroke and has gripped the sleeve 7 in preparation for a new insertion stroke.
  • the sleeve 7 is clamped between a handle 16 and a centering piece 17.
  • the sleeve lies with its flanged edge 14 against a shoulder 18 of the handle 16, while the centering piece 17 contacts with an end face 19 of its expansion sleeve 20 the end face 21 of the sleeve 7 facing the tube sheet 1.
  • the clamping force is applied by a pull rod 22 which is screwed with its lower end into the handle 16 and with its upper end into an expansion bolt 23 of the centering piece 17.
  • the centering piece 17 has, in addition to the expansion bolt 23 and an expansion sleeve 20 which overlaps the expansion bolt, a threaded sleeve 24 which overlaps the expansion sleeve and the expansion bolt and which engages in the end of the expansion bolt 23 provided with an external thread 25.
  • the expansion bolt 23 is parallel with one and provided perpendicular to its axis 26 elongated hole 27 through which a resilient locking bolt 28 extends, which is screwed into the expansion sleeve 20.
  • the locking bolt 28 projects with a spring-loaded ball 29 beyond the outer diameter of the cylindrical part of the expansion sleeve 20 and engages with an appropriate axial displacement of the expansion sleeve into an inner groove 30 of the threaded sleeve 24.
  • the lower part 22a of the two-part pull rod 22 is screwed into the handle 16 until a collar 33 of the lower part 22a comes to rest on an end face 34 of the handle 16. Then, with the interposition of a ring 35, the upper part 22b of the pull rod 22 with a cartridge 36 assigned to it is screwed into the lower part 22a of the pull rod 22 until the cartridge rests on the ring 35.
  • the cartridge designated as a whole by 36, is carried by part 22b of the pull rod 22.
  • the structure of the cartridge 36 which is intended to expand the sleeve 7 after its positioning by means of an explosive charge, is not further explained. It is only mentioned that the cavity 37 Pull rod 22 the ignition cables 38 are brought up.
  • the sleeve 7 is pushed onto the shoulder 18 of the handle 16 until it is seated. Then, as explained above, the centering piece 17, which has been brought into the locking between the threaded sleeve 24 and the expanding sleeve 20, is screwed onto the upper part 22b until it has both its expanding bolt 23 on a ring 35a superordinate to the cartridge 36 and its expanding sleeve 20 on the end face comes to rest on the sleeve 7.
  • the sleeve 7 clamped in this way is now transferred to the device already arranged in the steam generator chamber 6 and inserted in partial strokes into the pipe 3 to be repaired.
  • the sleeve 7 can thus be easily inserted into the tube, even if the axes of the sleeve and tube should not be exactly aligned.
  • the illustration of the holding device 12 which can be displaced in the axial direction of the steam generator has been omitted in FIG. 2. There is only so much mentioned that the clamping jaws of this holding device 12 are designed in such a way that they can easily grip both on the sleeve 7 itself and on the handle 16 having a larger diameter.
  • the holding plate 8 fixed to the tube sheet 1, in which the stationary holding device is integrated has a resiliently supported switching sleeve 40 on the bushing 39, which runs coaxially to a tube 3, which is guided in a socket 41 connected to the holding plate 8. From the end face of the bushing 41 facing the holding plate 8, cutouts 42 for accommodating compression springs 43 are made in the same.
  • the switching sleeve 40 is based on her assigned flange 44 from the springs 43 projecting beyond the end face of the bush 41.
  • the resilient suspension ensures that after the fixing of the holding plate 8 relative to the tube plate 1, the switching sleeve 40 definitely comes into contact with its upper edge on the contact surface 15 for the flanged edge 14 of the sleeve 7.
  • the inner diameter of the switching sleeve 40 must be designed larger than the outer diameter of the flange 14 to allow its passage.
  • a recess 45, 45a passes through the jacket 46, 46a of the switching sleeve 40 and the socket 41.
  • the recess 45 of the switching sleeve 40 is so large in its longitudinal extent that a clamping piece 47 of the stationary holding device 13 can be retracted in any position of the switching sleeve without problems.
  • the switching sleeve 40 On its edge facing away from the tube sheet 1, the switching sleeve 40 is stepped, the end face of a step being equipped with a contact. As can be seen from FIG. 2, right half, a further shoulder 48 is assigned to the handle 16 below the shoulder 18. A copper ring 49 is assigned to the shoulder surface of the shoulder 48 of the handle 16, upon its contact with the contact of the switching sleeve 40 the upward movement of the holding device 12 is interrupted.
  • the sleeve 7 can be positioned exactly.
  • the cartridge 36 is used to expand the sleeve and thus the adhesive connection between the outer sleeve wall and the inner tube wall.
  • the locking bolt 28 is released from the inner groove 30 of the threaded sleeve 24 of the centering piece 17, whereby the expansion sleeve 20 is inevitably relaxed to an outer diameter that is smaller than the inner diameter of the sleeve 7.
  • the inward movement of the expansion sleeve is supported by corresponding bevels 50, 51 of the end faces of the sleeve 7 and the expansion sleeve 20 if it has not already assumed the outer diameter required for the sleeve 7 to be passed through.
  • FIG. 3 shows a centering piece 17 moved together in this way on its way back in the direction of arrow 52 from the sleeve 7 adhesively connected to the tube 3.
  • the locking bolt 28 has reached the upper end of the elongated hole 27, so that the expansion sleeve even assumes a smaller diameter than the threaded sleeve 24.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)
  • Automatic Assembly (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Manufacture Of Motors, Generators (AREA)
EP89106233A 1988-04-14 1989-04-08 Einrichtung zum Einbringen einer Hülse in ein Rohr eines Dampferzeugers Expired - Lifetime EP0341429B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3812351A DE3812351C1 (enrdf_load_stackoverflow) 1988-04-14 1988-04-14
DE3812351 1988-04-14

Publications (2)

Publication Number Publication Date
EP0341429A1 EP0341429A1 (de) 1989-11-15
EP0341429B1 true EP0341429B1 (de) 1992-02-26

Family

ID=6351928

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89106233A Expired - Lifetime EP0341429B1 (de) 1988-04-14 1989-04-08 Einrichtung zum Einbringen einer Hülse in ein Rohr eines Dampferzeugers

Country Status (6)

Country Link
US (1) US4937933A (enrdf_load_stackoverflow)
EP (1) EP0341429B1 (enrdf_load_stackoverflow)
JP (1) JPH0217304A (enrdf_load_stackoverflow)
KR (1) KR960000487B1 (enrdf_load_stackoverflow)
DE (2) DE3812351C1 (enrdf_load_stackoverflow)
ES (1) ES2030933T3 (enrdf_load_stackoverflow)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8920382D0 (en) * 1989-09-08 1989-10-25 Nnc Ltd Heat exchangers
US5062199A (en) * 1990-01-11 1991-11-05 Haskel, Inc. Apparatus for radially expanding and anchoring sleeves within tubes
US5009002A (en) * 1990-01-11 1991-04-23 Haskel, Inc. Method for radially expanding and anchoring sleeves within tubes
US5201118A (en) * 1992-03-09 1993-04-13 Mcparland Kevin W Process for repairing heat-exchanger tubes
US5706626A (en) 1995-12-14 1998-01-13 Mueller; Lee W. Pre-assembled internal shear panel
FR2895791B1 (fr) * 2005-12-29 2008-04-04 Framatome Anp Sas Procede de reparation d'au moins une zone de raccordement d'une plaque de partition sur une plaque tubulaire d'une boite a eau d'un echangeur de chaleur.
JP2012040674A (ja) * 2010-08-23 2012-03-01 Mitsubishi Heavy Ind Ltd クランパ、水室内作業装置およびクランプ方法
DE102016013245A1 (de) * 2016-11-08 2018-06-07 Westinghouse Electric Germany Gmbh Bohrgerät für das Bearbeiten von Rohren in radioaktiver Umgebung

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3835520A (en) * 1973-09-10 1974-09-17 Harris R Tube pulling apparatus
US4213239A (en) * 1978-10-11 1980-07-22 Burt Filer Tube extractor
US4369569A (en) * 1981-06-06 1983-01-25 Armstrong & Sons Tube-pulling apparatus
DE3509177C1 (de) * 1985-03-14 1986-10-02 Brown Boveri Reaktor GmbH, 6800 Mannheim Einrichtung zum Einbringen eines zylindrischen Koerpers,insbesondere einer Huelse,in ein Rohr eines Dampferzeugers
DE3521355A1 (de) * 1985-06-14 1986-12-18 Brown Boveri Reaktor GmbH, 6800 Mannheim Absturzsicherung fuer eine vorrichtung zum ausziehen eines rohres aus einem rohrboden eines waermetauschers
US4672741A (en) * 1985-06-27 1987-06-16 Westinghouse Electric Corp. End effector apparatus for positioning a steam generator heat exchanger tube plugging tool
US4771526A (en) * 1985-10-07 1988-09-20 Westinghouse Electric Corp. Sleeving of steam generators
US4654943A (en) * 1986-02-24 1987-04-07 Foster Wheeler Energy Corporation Tube positioning tool and method for use
FR2595439B1 (fr) * 1986-03-10 1988-08-26 Thome Paul Methode de manchonnage de tubes de generateurs de vapeur et outils correspondants
US4829648A (en) * 1987-01-27 1989-05-16 Westinghouse Electric Corp. Apparatus and method for simultaneously loading a reinforcing sleeve and mandrel into a tube
US4779445A (en) * 1987-09-24 1988-10-25 Foster Wheeler Energy Corporation Sleeve to tube expander device

Also Published As

Publication number Publication date
KR890016359A (ko) 1989-11-28
KR960000487B1 (ko) 1996-01-08
DE3812351C1 (enrdf_load_stackoverflow) 1990-01-11
ES2030933T3 (es) 1992-11-16
EP0341429A1 (de) 1989-11-15
JPH0217304A (ja) 1990-01-22
US4937933A (en) 1990-07-03
DE58900850D1 (de) 1992-04-02

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