Apparatus and method for plugging a tube

Both an apparatus (1) and method for plugging a conduit, such as a tube (3) in the tubesheet of a nuclear steam generator, is disclosed herein. The plugging apparatus (1) generally comprises an inelastically expandable plug (5) that contains a fluid-receiving cavity (6), and an expansion means (7) i...

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Bibliographische Detailangaben
Hauptverfasser:	COLE, WILLIAM GARY, CALHOUN, GREGORY LEE, KOLBERG, KENNETH DANIEL, WILHELM, JOHN JOSEPH
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HAND TOOLS HEAT EXCHANGE IN GENERAL HEATING JOINTS OR FITTINGS FOR PIPES LIGHTING MANIPULATORS MEANS FOR THERMAL INSULATION IN GENERAL MECHANICAL ENGINEERING METHODS OF STEAM GENERATION PERFORMING OPERATIONS PIPES PORTABLE POWER-DRIVEN TOOLS STEAM BOILERS STEAM GENERATION SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING THERMAL INSULATION IN GENERAL TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FORFASTENING, CONNECTING, DISENGAGING OR HOLDING TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	Both an apparatus (1) and method for plugging a conduit, such as a tube (3) in the tubesheet of a nuclear steam generator, is disclosed herein. The plugging apparatus (1) generally comprises an inelastically expandable plug (5) that contains a fluid-receiving cavity (6), and an expansion means (7) including both a source of pressurized hydraulic fluid and a pull-rod member (8) having a piston for advantageously applying both a radially expansive force and a compressive force to the plug (5) at the same time in order to inelastically expand it into sealing engagement with the inner wall of a tube (3). Both the apparatus and method of the invention are particularly well suited for installing plugs in tubes surrounded by relatively inelastic structures, such as tubesheets.