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EP0169471A2 - Tool for extracting a tube from a tube sheet - Google Patents

Tool for extracting a tube from a tube sheet Download PDF

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Publication number
EP0169471A2
EP0169471A2 EP85108838A EP85108838A EP0169471A2 EP 0169471 A2 EP0169471 A2 EP 0169471A2 EP 85108838 A EP85108838 A EP 85108838A EP 85108838 A EP85108838 A EP 85108838A EP 0169471 A2 EP0169471 A2 EP 0169471A2
Authority
EP
European Patent Office
Prior art keywords
mandrel
hydraulic
tube sheet
tool
piston
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
EP85108838A
Other languages
German (de)
French (fr)
Other versions
EP0169471A3 (en
EP0169471B1 (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
Kraftwerk Union AG
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 Kraftwerk Union AG, Siemens AG filed Critical Kraftwerk Union AG
Publication of EP0169471A2 publication Critical patent/EP0169471A2/en
Publication of EP0169471A3 publication Critical patent/EP0169471A3/en
Application granted granted Critical
Publication of EP0169471B1 publication Critical patent/EP0169471B1/en
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 has for its object to design the tool so that it can be operated remotely and that the mandrel can be removed from the tool without any special assembly measures.
  • the cylinder of the hydraulic drive is attached to a mounting plate which can be fixed on the tube plate in that furthermore, the cylinder of a hydraulic tensioning piston is fastened to the reciprocating piston of the hydraulic drive, which comprises the drawing mandrel and engages with it via wedge-shaped clamping jaws which can be displaced in the longitudinal direction of the drawing mandrel, and that the tensioning piston has two hydraulic lifting pistons for this purpose, one of which is narrow End and the other abuts the wide end of the wedge-shaped jaws.
  • the tool can be operated remotely after further fixing to the tube sheet without any manual intervention. Furthermore, after a piece of pipe is pulled out of the tube sheet, the drawing mandrel can be removed from the tool without impairing the function of the drawing tool when the tensioning piston is in a de-energized state. - Otherwise, 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 a partial length in the tube sheet, and by using the tensioning piston, the mandrel is gradually removed from the tube in several successive steps of the hydraulic linear drive floor pulled out.
  • 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 in one and the other direction can be pressed.
  • the reciprocating piston 12 is screwed to a cylindrical extension of the housing of the tensioning piston 20.
  • This cylindrical projection 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 pistons 24 and 25 are arranged, of which the piston 24 against the Narrow ends of three jaws 26 arranged on a pitch circle presses, while the piston 25 presses against the wide ends of these 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 lifting pistons 24 and 25.
  • the mandrel 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. Subsequently, the reciprocating piston 12 is pressurized from the hydraulic connection 15, the heating tube piece 2 being pulled out of the tube sheet 1 by a corresponding amount. Thereupon, the reciprocating piston 25 is relaxed and the reciprocating piston 24 is actuated, as a result of which the tension between the clamping piston 20 and the drawing mandrel 3 is released. Thereafter, the lifting piston 12 is 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 such that the clamping jaws 26 come into contact with the drawing mandrel in each case in a cylindrical-shaped recess 5 when the lifting piston 25 is actuated.
  • the heating tube section 2 is pulled out of the tube sheet 1.
  • the lifting piston 24 is actuated for the last time, 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)

Abstract

Das neue Werkzeug zum Herausziehen eines rohrstückes aus dem Rohrboden eines Dampferzeugers besteht aus einem in das Rohrstück einschraubbaren Ziehdorn (3) und einem diesen Ziehdorn umgebenden hydraulischen Linearantrieb (10), der sich fixierbar am Rohrboden abstützt. Am Hubkolben (12) des hydraulischen Antriebes ist der Zylinder eines hydraulischen Spannkolbens (20) befestigt, welcher den Ziehdorn umfaßt und mit diesem über Klemmbacken (26) im Eingriff steht.The new tool for pulling a pipe section out of the tube sheet of a steam generator consists of a drawing mandrel (3) that can be screwed into the tube piece and a hydraulic linear drive (10) surrounding this drawing pin, which is supported in a fixable manner on the tube sheet. The cylinder of a hydraulic tensioning piston (20) is attached to the reciprocating piston (12) of the hydraulic drive, which comprises the drawing mandrel and engages with it via clamping jaws (26).

Description

Die Erfindung befaßt sich mit der konstruktiven Ausgestaltung eines Werkzeuges, mit dem Heizrohrstücke aus dem Rohrboden eines Dampferzeugers herausgezogen werden können. Ein bekanntes Werkzeug dieser Art besteht aus einem in das Heizrohrstück einschraubbaren Ziehdorn und aus einem hydraulischen Linearantrieb, der sich einerseits am Rohrboden abstützt und der andererseits am freien Ende des Ziehdornes angreift. Dabei ist der Ziehdorn mit dem Zylinder des hydraulischen Antriebes fest verbunden. Der Hubkolben des hydraulischen Antriebes stützt sich am Rohrboden ab, wobei das Werkzeug als Ganzes von Hand zu betätigen ist. Bei diesem Werkzeug ist der hydraulische Antrieb mit einem relativ großen Hubbereich versehen, um das Heizrohrstück mit jedem Hub möglichst weit aus dem Rohrboden herausziehen zu können. - Beim Entfernen des herausgezogenen Heizrohrstückes vom Ziehdorn muß die formschlüssige Verbindung zwischen dem Ziehdorn und dem Zylinder des hydraulischen Antriebes manuell gelöst werden.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. With this tool, 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. - When removing the extracted heating tube from the mandrel, the positive connection between the mandrel and the cylinder of the hydraulic drive must be released manually.

Ausgehend von einem Werkzeug mit den Merkmalen des Oberbegriffes des Schutzanspruches 1 liegt der Erfindung die Aufgabe zugrunde, das Werkzeug so auszugestalten, daß es fernbedient werden kann und daß der Ziehdorn ohne besondere montagetechnische Maßnahmen aus dem Werkzeug entfernt werden kann.Starting from a tool with the features of the preamble of protection claim 1, the invention has for its object to design the tool so that it can be operated remotely and that the mandrel can be removed from the tool without any special assembly measures.

Zur Lösung dieser Aufgabe ist gemäß der Erfindung vorgesehen, daß der Zylinder des hydraulischen Antriebes an einer am Rohrboden fixierbaren Montageplatte befestigt ist, daß weiterhin am Hubkolben des hydraulischen Antriebes der Zylinder eines hydraulischen Spannkolbens befestigt ist, welcher den Ziehdorn umfaßt und mit diesem über keilförmige, in Längsrichtung des Ziehdornes verschiebbare Klemmbacken im Eingriff steht, und daß der Spannkolben hierzu zwei hydraulische Hubkolben aufweist, von denen der eine am schmalen Ende und der andere am breiten Ende der keilförmigen Klemmbacken anliegt.To solve this problem it is provided according to the invention that the cylinder of the hydraulic drive is attached to a mounting plate which can be fixed on the tube plate in that furthermore, the cylinder of a hydraulic tensioning piston is fastened to the reciprocating piston of the hydraulic drive, which comprises the drawing mandrel and engages with it via wedge-shaped clamping jaws which can be displaced in the longitudinal direction of the drawing mandrel, and that the tensioning piston has two hydraulic lifting pistons for this purpose, one of which is narrow End and the other abuts the wide end of the wedge-shaped jaws.

Beim Einsatz eines derart ausgebildeten Werkzeuges ergibt sich eine wesentlich geringere Verweilzeit des Bedienpersonals in der entsprechenden Kammer eines Wärmetauschers. Dies ist insbesondere von Bedeutung für Wärmetauscher in Kernkraftanlagen, um die Strahlenbelastung des Bedienpersonal so gering wie möglich zu halten. Durch Verwendung des hydraulischen Spannkolbens kann das Werkzeug nach dem Fixieren am Rohrboden ohne weitere manuelle Eingriffe fernbedient werden. Weiterhin kann nach dem Herausziehen eines Rohrstückes aus dem Rohrboden der Ziehdorn ohne eine Beeinträchtigung der Funktion des Ziehwerkzeuges bei spannungslosem Zustand des Spannkolbens aus dem Werkzeug herausgenommen werden. - Im übrigen kann das jeweilige Rohrstück auch dann noch gezogen werden, wenn das Rohrende mit dem eingeschraubten Ziehdorn bereits die Klemmbacken passiert hat. Wenn dabei das jeweilige Rohrstück nicht als Ganzes aus dem Rohrboden herausgezogen werden kann, weil der freie Raum unter dem Ziehwerkzeug dazu nicht ausreicht, so kann ein Teil des Rohrstückes unmittelbar unterhalb des Ziehwerkzeuges abgetrennt und anschließend das übrige Teil ohne Einsatz des Ziehdornes herausgezogen werden.When using a tool designed in this way, there is a significantly shorter dwell time for the operating personnel in the corresponding chamber of a heat exchanger. This is particularly important for heat exchangers in nuclear power plants in order to keep the radiation exposure of the operating personnel as low as possible. By using the hydraulic clamping piston, the tool can be operated remotely after further fixing to the tube sheet without any manual intervention. Furthermore, after a piece of pipe is pulled out of the tube sheet, the drawing mandrel can be removed from the tool without impairing the function of the drawing tool when the tensioning piston is in a de-energized state. - Otherwise, the respective pipe section can still be pulled even if the pipe end with the screwed-in mandrel has already passed the clamping jaws. If the respective piece of pipe cannot be pulled out of the tube sheet as a whole because the free space under the drawing tool is not sufficient, a part of the pipe section can be cut off immediately below the drawing tool and the remaining part can then be pulled out without using the drawing mandrel.

Durch die Fixierung des Ziehdornes im Heizrohrstück, solange sich dieses auf einer Teillänge noch im Rohrboden befindet, sowie durch die Verwendung des Spannkolbens wird der Ziehdorn in mehreren aufeinanderfolgenden Schritten des hydraulischen Linearantriebes schrittweise aus dem Rohrboden herausgezogen. Um hierbei eine sichere Verankerung der Klemmbacken des Spannkolbens am Ziehdorn zu gewährleisten, empfiehlt es sich, den Ziehdorn mit in Achsrichtung gestaffelt angeordneten zylinderringförmigen Ausnehmungen zum Eingriff der Klemmbacken zu versehen.By fixing the mandrel in the heating tube piece, as long as it is still in a partial length in the tube sheet, and by using the tensioning piston, the mandrel is gradually removed from the tube in several successive steps of the hydraulic linear drive floor pulled out. 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.

Ein Ausführungsbeispiel des neuen Werkzeuges ist in der Figur dargestellt.An embodiment of the new tool is shown in the figure.

Die Figur zeigt im Ausschnitt den Rohrboden 1 eines Wärmetauschers, in dem sich das Ende eines Heizrohres 2 befindet. In dieses Heizrohrstück ist das eine Ende eines Ziehdornes 3 eingeschraubt, der an seinem anderen Ende zum Ansetzen eines entsprechenden Werkzeuges ausgebildet ist. Der Ziehdorn 3 ist umgeben von dem hydraulischen Linearantrieb 10 und dem hydraulischen Spannkolben 20. Dabei ist das Gehäuse 11 des hydraulischen Antriebes 10 an einer Montageplatte 4 befestigt, die ihrerseits mittels nicht näher dargestellter Schnellspannelemente am Rohrboden 1 festgeklemmt ist.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. In this heating pipe piece, one end of 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).

Der hydraulische Antrieb 10 besteht im wesentlichen aus dem Zylinder 11 und dem Hubkolben 12, der innen an der Innenbuchse 13 anliegt und dessen Hubraum zur Montageplatte hin durch den Ring 14 verschlossen ist. Im Zylinder 11 sind die beiden hydraulischen Anschlüsse 15 und 16 vorgesehen, über die eine hydraulische Flüssigkeit zur Verschiebung des Hubkolbens 12 in der einen und der anderen Richtung einpreßbar ist.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. In the cylinder 11, the two hydraulic connections 15 and 16 are provided, via which a hydraulic fluid for displacing the reciprocating piston 12 in one and the other direction can be pressed.

Der Hubkolben 12 ist mit einem zylindrischen Ansatz des Gehäuses des Spannkolbens 20 verschraubt. Dieser zylindrische Ansatz befindet sich am Deckel 21, der zusammen mit dem Deckel 23, dem Gehäuseteil 22 und der Spannbuchse 29 das Gehäuse des Spannkolbens 20 bildet. Innerhalb des Gehäuseteiles 22 und des Deckels 23 sind die beiden Hubkolben 24 und 25 angeordnet, von denen der Hubkolben 24 gegen die schmalen Enden von drei auf einem Teilkreis angeordneten Klemmbacken 26 drückt, während der Hubkolben 25 gegen die breiten Enden dieser Klemmbacken drückt. Die Klemmbacken 26 werden in gelöstem Zustand mittels Druckfedern 30 nach außen an die Spannbuchse 29 gedrückt. - Zum Antrieb der Hubkolben 24 und 25 sind die hydraulischen Anschlüsse 27 und 28 vorgesehen.The reciprocating piston 12 is screwed to a cylindrical extension of the housing of the tensioning piston 20. This cylindrical projection 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. Within the housing part 22 and the cover 23, the two pistons 24 and 25 are arranged, of which the piston 24 against the Narrow ends of three jaws 26 arranged on a pitch circle presses, while the piston 25 presses against the wide ends of these jaws. In the released state, 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 lifting pistons 24 and 25.

Der Ziehdorn 3 ist im übrigen mit zylinderringförmigen Ausnehmungen 5 versehen, in welche die Klemmbacken 26 eingreifen können.The mandrel 3 is otherwise provided with cylindrical recesses 5, in which the jaws 26 can engage.

Beim Betrieb des Werkzeuges werden zunächst durch Antrieb des Hubkolbens 25 die Klemmbacken 26 mit dem Ziehdorn 3 verspannt. Anschließend wird der Hubkolben 12 von dem Hydraulikanschluß 15 her unter Druck gesetzt, wobei das Heizrohrstück 2 um ein entsprechendes Stück aus dem Rohrboden 1 herausgezogen wird. Daraufhin wird der Hubkolben 25 entspannt und der Hubkolben 24 betätigt, wodurch die Verspannung zwischen dem Spannkolben 20 und dem Ziehdorn 3 gelöst wird. Danach wird der Hubkolben 12 von der Hydraulik- öffnung 16 her mit Druck beaufschlagt und führt den Spannkolben 20 in eine neue Position in bezug auf den Ziehdorn. Die Hubhöhe des Hubkolbens 12 ist dabei zweckmäßig so ausgelegt, daß die Spannbacken 26 beim Betätigen des Hubkolbens 25 jeweils in einer zylinderringförmigen Ausnehmung 5 zum Anliegen am Ziehdorn kommen.When the tool is in operation, the clamping jaws 26 are first clamped with the drawing mandrel 3 by driving the lifting piston 25. Subsequently, the reciprocating piston 12 is pressurized from the hydraulic connection 15, the heating tube piece 2 being pulled out of the tube sheet 1 by a corresponding amount. Thereupon, the reciprocating piston 25 is relaxed and the reciprocating piston 24 is actuated, as a result of which the tension between the clamping piston 20 and the drawing mandrel 3 is released. Thereafter, the lifting piston 12 is 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 such that the clamping jaws 26 come into contact with the drawing mandrel in each case in a cylindrical-shaped recess 5 when the lifting piston 25 is actuated.

Nach mehrfacher, schrittweiser Betätigung der Hubkolben 25, 12 und 24 ist das Heizrohrstück 2 aus dem Rohrboden 1 herausgezogen. Beim letztmaligen Betätigen des Hubkolbens 24 wird der Ziehdorn 3 manuell oder auch fernbedient ergriffen und aus dem Werkzeug zusammen mit dem Hiezrohrstück 2 herausgenommen. Wenn der Ziehdorn bereits vorher entfernt wurde, wird nur das entsprechende Heizrohrstück ergriffen und herausgenommen.After multiple, step-by-step actuation of the reciprocating pistons 25, 12 and 24, the heating tube section 2 is pulled out of the tube sheet 1. When the lifting piston 24 is actuated for the last time, 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.

Claims (2)

1. Werkzeug zum Herausziehen von Heizrohrstücken aus dem Rohrboden eines Dampferzeugers, bestehend aus einem in das Heizrohrstück einschraubbaren Ziehdorn und einem hydraulischen Linearantrieb, der einerseits am Rohrboden abgestützt ist und andererseits am freien Ende des Ziehdornes angreift,
dadurch gekennzeichnet,
daß der Zylinder (11) des hydraulischen Antriebes (10) an einer am Rohrboden (1) fixierbaren Montageplatte (4) befestigt ist, daß am Hubkolben (12) des hydraulischen Antriebes der Zylinder (20) eines hydraulischen Spannkolbens befestigt ist, welcher den Gewindedorn (3) umfaßt und mit diesem über keilförmige, in Längsrichtung des Ziehdornes verschiebbare Klemmbacken (26) im Eingriff steht,
wobei der
Spannkolben zwei hydraulische Hubkolben (24, 25) aufweist, von denen der eine am schmalen Ende und der andere am breiten Ende der keilförmigen Klemmbacken (26) anliegt.1. Tool for pulling heating pipe pieces out of the tube sheet of a steam generator, consisting of a drawing mandrel that can be screwed into the heating tube piece and a hydraulic linear drive that is supported on the one hand on the tube sheet and on the other hand acts on the free end of the drawing mandrel,
characterized,
that the cylinder (11) of the hydraulic drive (10) is attached to a mounting plate (4) which can be fixed on the tube sheet (1), that the cylinder (20) of a hydraulic tensioning piston is fastened to the reciprocating piston (12) of the hydraulic drive and holds the threaded mandrel (3) and engages with it via wedge-shaped clamping jaws (26) which can be displaced in the longitudinal direction of the drawing mandrel,
being the
Tensioning piston has two hydraulic lifting pistons (24, 25), one of which rests on the narrow end and the other on the wide end of the wedge-shaped clamping jaws (26). 2. Werkzeug nach Anspruch 1, dadurch gekennzeichnet, daß der'Ziehdorn (3) mit in Achsrichtung gestaffelt angeordneten zylinderringförmigen Ausnehmungen (5) zum Eingriff der Klemmbacken (26) versehen ist.2. Tool according to claim 1, characterized in that the 'mandrel (3) is provided with staggered in the axial direction arranged cylindrical ring-shaped recesses (5) for engagement of the jaws (26).
EP85108838A 1984-07-26 1985-07-15 Tool for extracting a tube from a tube sheet Expired - Lifetime EP0169471B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19848422476U DE8422476U1 (en) 1984-07-26 1984-07-26 TOOL TO EXTRACT A PIPE PIECE FROM A PIPE BASE
DE8422476U 1984-07-26

Publications (3)

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

Family

ID=6769270

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85108838A Expired - Lifetime EP0169471B1 (en) 1984-07-26 1985-07-15 Tool for extracting a tube from a tube sheet

Country Status (4)

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

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WO1993016840A1 (en) * 1992-02-28 1993-09-02 Combustion Engineering, Inc. O.d. gripper
EP3159112A3 (en) * 2015-09-30 2017-08-30 TKR Spezialwerkzeuge GmbH Rivet gun with stroke limiting

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US4829660A (en) * 1987-05-18 1989-05-16 Westinghouse Electric Corp. System for removing a plug from a heat exchanger tube
DE4120351A1 (en) * 1991-06-19 1992-12-24 Bbc Reaktor Gmbh Drawing pipe piece out of heat exchanger
DE4204657C1 (en) * 1992-02-15 1993-08-05 Abb Reaktor Gmbh, 6800 Mannheim, De
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
DE102007043286A1 (en) 2007-09-11 2009-03-12 Chang, Doo-Bong, Dr. Dipl.-Ing. Variable-reach robotic arm for clean transport of e.g. silicon wafers, optical media or solar cells, employs single drive unit, fixed toothed wheel and series of meshing gears
US10724808B2 (en) 2018-08-09 2020-07-28 Saudi Arabian Oil Company Plugging a heat exchanger tube
CN110227925B (en) * 2019-04-04 2024-03-15 大连白云机电设备有限公司 Novel tube bundle drawing and installing machine

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FR2311629A1 (en) * 1975-04-30 1976-12-17 Combustion Eng METHOD AND APPARATUS FOR EXTRACTING TUBES FROM A TUBE TRAY
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WO1993016840A1 (en) * 1992-02-28 1993-09-02 Combustion Engineering, Inc. O.d. gripper
US5291651A (en) * 1992-02-28 1994-03-08 Combustion Engineering, Inc. O.D. gripper
EP3159112A3 (en) * 2015-09-30 2017-08-30 TKR Spezialwerkzeuge GmbH Rivet gun with stroke limiting

Also Published As

Publication number Publication date
DE8422476U1 (en) 1984-10-31
JPS6133873A (en) 1986-02-17
JPH0457476B2 (en) 1992-09-11
DE3575526D1 (en) 1990-03-01
US4670975A (en) 1987-06-09
EP0169471A3 (en) 1986-05-07
EP0169471B1 (en) 1990-01-24

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