EP0169471B1 - Werkzeug zum Herausziehen eines Rohrstückes aus einem Rohrboden - Google Patents

Werkzeug zum Herausziehen eines Rohrstückes aus einem Rohrboden Download PDF

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Publication number
EP0169471B1
EP0169471B1 EP85108838A EP85108838A EP0169471B1 EP 0169471 B1 EP0169471 B1 EP 0169471B1 EP 85108838 A EP85108838 A EP 85108838A EP 85108838 A EP85108838 A EP 85108838A EP 0169471 B1 EP0169471 B1 EP 0169471B1
Authority
EP
European Patent Office
Prior art keywords
piston
draw pin
hydraulic
tool
tube sheet
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
EP85108838A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0169471A2 (de
EP0169471A3 (en
Inventor
Heinrich Dettinger
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP0169471A2 publication Critical patent/EP0169471A2/de
Publication of EP0169471A3 publication Critical patent/EP0169471A3/de
Application granted granted Critical
Publication of EP0169471B1 publication Critical patent/EP0169471B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B25B27/026—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same fluid driven
    • 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
    • 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
    • Y10T29/53796—Puller or pusher means, contained force multiplying operator
    • Y10T29/5383—Puller or pusher means, contained force multiplying operator having fluid operator

Definitions

  • the invention is concerned with the structural design of a tool with which heating tube pieces can be pulled out of the tube sheet of a steam generator.
  • a known tool of this type consists of a mandrel that can be screwed into the heating tube piece and a hydraulic linear drive which is supported on the one hand on the tube sheet and which on the other hand acts on the free end of the mandrel.
  • the mandrel is firmly connected to the cylinder of the hydraulic drive.
  • the reciprocating piston of the hydraulic drive is supported on the tube sheet, whereby the tool as a whole can be operated by hand.
  • the hydraulic drive is provided with a relatively large stroke range in order to be able to pull the heating tube piece out of the tube sheet as far as possible with each stroke.
  • the invention is based on the object of designing the tool in such a way that it can be operated remotely and that the drawing mandrel does not require any special assembly measures the tool can be removed.
  • the tool can be operated remotely after further fixing to the tube sheet without any manual intervention. Furthermore, after a pipe section has been pulled out of the tube sheet, the drawing dome can be removed from the tool without impairing the function of the drawing tool when the tensioning piston is in a de-energized state. In addition, the respective pipe section can still be pulled even if the pipe end with the screwed-in mandrel has already passed the clamping jaws.
  • the mandrel By fixing the mandrel in the heating tube piece, as long as it is still in part in the tube sheet, and by using the tensioning piston, the mandrel is gradually pulled out of the tube sheet in several successive steps of the hydraulic linear drive.
  • the drawing mandrel In order to ensure that the clamping jaws of the clamping piston are securely anchored to the drawing mandrel, it is advisable to provide the drawing mandrel with staggered cylindrical ring-shaped recesses for engaging the clamping jaws.
  • the figure shows a section of the tube sheet 1 of a heat exchanger in which the end of a heating tube 2 is located.
  • a mandrel 3 is screwed, which is formed at its other end for attaching a corresponding tool.
  • the mandrel 3 is surrounded by the hydraulic linear drive 10 and the hydraulic tensioning piston 20.
  • the housing 11 of the hydraulic drive 10 is fastened to a mounting plate 4, which in turn is clamped to the tube sheet 1 by means of quick-release elements (not shown).
  • the hydraulic drive 10 consists essentially of the cylinder 11 and the reciprocating piston 12, which bears against the inner bush 13 on the inside and whose displacement is closed to the mounting plate by the ring 14.
  • the two hydraulic connections 15 and 16 are provided, via which a hydraulic fluid for displacing the reciprocating piston 12 can be pressed in one and the other direction.
  • the reciprocating piston 12 is screwed to a cylindrical extension of the housing of the tensioning piston 20.
  • This cylindrical one. Approach is located on the cover 21, which together with the cover 23, the housing part 22 and the clamping bush 29 forms the housing of the clamping piston 20.
  • the two lifting pistons 24 and 25 are arranged, of which the lifting piston 24 presses against the narrow ends of three clamping jaws 26 arranged on a pitch circle, while the lifting piston 25 presses against the wide ends of these clamping jaws.
  • the clamping jaws 26 are pressed outward against the clamping bush 29 by means of compression springs 30.
  • the hydraulic connections 27 and 28 are provided for driving the reciprocating pistons 24 and 25.
  • the pull dome 3 is otherwise provided with cylindrical recesses 5, in which the jaws 26 can engage.
  • the clamping jaws 26 are first clamped with the drawing mandrel 3 by driving the lifting piston 25.
  • the reciprocating piston 12 is then pressurized from the hydraulic connection 15, the heating tube section 2 being pulled out of the tube sheet 1 by a corresponding amount becomes.
  • the reciprocating piston 25 is relaxed and the reciprocating piston 24 is actuated, whereby the tension between the clamping piston 20 and the drawing mandrel 3 is released.
  • the lifting piston 12 is then pressurized from the hydraulic opening 16 and guides the tensioning piston 20 into a new position with respect to the drawing mandrel.
  • the lifting height of the lifting piston 12 is expediently designed so that the clamping jaws. 26 come into contact with the drawing mandrel when actuating the reciprocating piston 25 in a cylindrical ring-shaped recess 5.
  • the heating tube section 2 is pulled out of the tube sheet 1.
  • the drawing mandrel 3 is gripped manually or remotely and removed from the tool together with the heating tube piece 2. If the mandrel has already been removed, only the corresponding piece of heating tube is gripped and removed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
  • Metal Extraction Processes (AREA)
EP85108838A 1984-07-26 1985-07-15 Werkzeug zum Herausziehen eines Rohrstückes aus einem Rohrboden Expired - Lifetime EP0169471B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19848422476U DE8422476U1 (de) 1984-07-26 1984-07-26 Werkzeug zum herausziehen eines rohrstueckes aus einem rohrboden
DE8422476U 1984-07-26

Publications (3)

Publication Number Publication Date
EP0169471A2 EP0169471A2 (de) 1986-01-29
EP0169471A3 EP0169471A3 (en) 1986-05-07
EP0169471B1 true EP0169471B1 (de) 1990-01-24

Family

ID=6769270

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85108838A Expired - Lifetime EP0169471B1 (de) 1984-07-26 1985-07-15 Werkzeug zum Herausziehen eines Rohrstückes aus einem Rohrboden

Country Status (4)

Country Link
US (1) US4670975A (enrdf_load_stackoverflow)
EP (1) EP0169471B1 (enrdf_load_stackoverflow)
JP (1) JPS6133873A (enrdf_load_stackoverflow)
DE (2) DE8422476U1 (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4120351A1 (de) * 1991-06-19 1992-12-24 Bbc Reaktor Gmbh Verfahren und vorrichtung zum markieren eines von einem rohr abgetrennten rohrstueckes
DE4204657C1 (enrdf_load_stackoverflow) * 1992-02-15 1993-08-05 Abb Reaktor Gmbh, 6800 Mannheim, De
DE102007043286A1 (de) 2007-09-11 2009-03-12 Chang, Doo-Bong, Dr. Dipl.-Ing. Vorrichtung zum Transportieren von Substraten

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4829660A (en) * 1987-05-18 1989-05-16 Westinghouse Electric Corp. System for removing a plug from a heat exchanger tube
WO1993016840A1 (en) * 1992-02-28 1993-09-02 Combustion Engineering, Inc. O.d. gripper
US7305756B2 (en) * 2004-04-22 2007-12-11 Barcock & Wilcox Canada Ltd. Tube extracting device
US7194800B2 (en) * 2004-06-07 2007-03-27 Babcick & Wilcox Canada, Ltd. Internal tube extracting device with a cylindrical collapsing wedge
US7146716B2 (en) * 2004-06-08 2006-12-12 Babcock & Wilcox Canada Ltd. External tube extraction device with a cylindrical collapsing wedge
US7168143B2 (en) * 2004-06-30 2007-01-30 Babcock & Wilcox Canada Ltd. External tube deforming extraction device
DE102015116559B4 (de) * 2015-09-30 2018-11-08 Tkr Spezialwerkzeuge Gmbh Werkzeugwechsel bei Blindnietmuttern
US10724808B2 (en) 2018-08-09 2020-07-28 Saudi Arabian Oil Company Plugging a heat exchanger tube
CN110227925B (zh) * 2019-04-04 2024-03-15 大连白云机电设备有限公司 一种新型管束抽装机

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3938427A (en) * 1972-07-19 1976-02-17 Vulcan Iron Works, Inc. Percussion hammer
US3986245A (en) * 1975-04-30 1976-10-19 Combustion Engineering, Inc. Tube removal method
FR2321060A1 (fr) * 1975-08-12 1977-03-11 Bretagne Atel Chantiers Dispositif d'immobilisation d'un piston dans son cylindre
US4015821A (en) * 1976-01-14 1977-04-05 Vulcan Iron Works, Inc. Cable tensioning assembly
US4095335A (en) * 1977-01-12 1978-06-20 Trouvay & Cauvin Automatic tube puller
US4366617A (en) * 1980-03-12 1983-01-04 Westinghouse Electric Corp. Plug removal apparatus
US4406856A (en) * 1980-09-29 1983-09-27 Westinghouse Electric Corp. Removal of portions of tubes from steam generator of nuclear reactor
US4438901A (en) * 1982-01-25 1984-03-27 Gripper, Inc. Apparatus for tensioning a stud and method of doing same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4120351A1 (de) * 1991-06-19 1992-12-24 Bbc Reaktor Gmbh Verfahren und vorrichtung zum markieren eines von einem rohr abgetrennten rohrstueckes
DE4204657C1 (enrdf_load_stackoverflow) * 1992-02-15 1993-08-05 Abb Reaktor Gmbh, 6800 Mannheim, De
DE102007043286A1 (de) 2007-09-11 2009-03-12 Chang, Doo-Bong, Dr. Dipl.-Ing. Vorrichtung zum Transportieren von Substraten

Also Published As

Publication number Publication date
EP0169471A2 (de) 1986-01-29
US4670975A (en) 1987-06-09
DE8422476U1 (de) 1984-10-31
EP0169471A3 (en) 1986-05-07
DE3575526D1 (de) 1990-03-01
JPS6133873A (ja) 1986-02-17
JPH0457476B2 (enrdf_load_stackoverflow) 1992-09-11

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