Boiler repair
AssigneeSMA Controls, Inc.
InventorsMatthew T. Brennan, James A. Moruzzi
Life of this patent
Estimating the term…
Abstract
Boiler tube repair apparatus includes elongated guide rail structure for securing to a boiler tube panel adjacent a desired cut region, and three tool assemblies for mounting on the guide rail structure. Each tool assembly includes carriage structure with guide structure for engaging the guide rail structure and support structure on which a tube machining tool is mounted and that defines a tool movement axis dedicated to and coordinated with that tool. Each machining tool includes a drive motor, a manual motor control, a drive shaft and a machining member such as a cutter disc or head.
Claims14
Boiler tube repair apparatus comprising elongated guide rail structure for securing to a boiler tube panel adjacent a repair region, and an end prep tool assembly for mounting on said guide rail structure,
- said end prep tool assembly including carriage structure with guide structure for engaging said guide rail structure for movement there along reference axis defining structure secured to said carriage structure having a reference axis extending transversely to said guide rail structure,
- an end prep tool mounted on said reference axis defining structure for swiveling movement about said reference axis, said end prep tool including a drive motor, a manual motor control, a drive shaft and a cutter head mounted on said drive shaft for rotation about an axis parallel to said reference axis,
- and a drive arrangement coupled between said reference axis defining structure and said end prep tool for moving said cutter head along a path parallel to said reference axis to end prep the end of a boiler tube.
An end prep tool assembly for boiler tube repair comprising a drive motor, a manual motor control, a drive shaft, a cutter head mounted on said drive shaft for rotation about an axis, said cutter head including a plurality of cutter blade inserts, each said cutter blade insert having a cutting edge, parallel opposed main surfaces and configured sidewall surfaces, a body, a plurality of recesses in said body for receiving said cutter blade inserts, each said recess having a base surface and configured side walls so that a main surface of each said cutter blade insert can be only seated on the base surface of its recess with said configured sidewalls of the insert and its recess in mating relation such that its said cutting edge is in proper orientation, fastener means for securing said cutter blade inserts in said recesses, said drive motor being adapted to drive said cutter head in rotation at a speed of at least about ten thousand rpm, and a gear unit that couples said cutter head to said drive motor such that the axis of said cutter head is disposed outwardly of and in offset relation to said drive motor.
An end prep tool assembly for boiler tube repair comprising a drive motor, a manual motor control, a drive shaft coupled to said drive motor, a cutter head mounted on said drive shaft for rotation about an axis, said cutter head including a plurality of cutter blade inserts, a body a plurality of recesses in said body for receiving said cutter blade inserts, each said recess and each said cutter blade insert having configured side walls that mate with one another so that each said cutter blade insert can be seated in a corresponding one of said recesses only in proper orientation, fastener means for securing said cutter blade inserts in said recesses, said drive motor being adapted to drive said cutter head in rotation at a speed of at least about ten thousand rpm, said cutter head further including a one-piece pilot projection coaxial with the axis of rotation of said cutter head, said pilot projection being fixed for rotation with said cutter head and having a circumferential surface adapted to be received within the inner diameter of the boiler tube whose end surface is to be prepped, said pilot projection having an array of axially extending recesses spaced about its circumferential surface.
Dependencies are inferred from the claim text.