Boiler tube flared-end compression tool

Details Boiler tube flared-end compression tool Boiler tube flared-end compression tool

1999-10-12

2001-03-27

Hughes, S. Thomas (Department: 3726)

Metal working

Plural diverse manufacturing apparatus including means for...

Binding or covering and cutting

C029S727000, C029S726000, C029S890031

Reexamination Certificate

active

06205632

ABSTRACT:

CROSS-REFERENCES
None.
FIELD OF THE INVENTION
This invention pertains generally to power boilers, and specifically concerns apparatus that is particularly useful in connection with the removal of selected installed boiler tubes for subsequent replacement.
BACKGROUND OF THE INVENTION
The removal of water-tubes and fire-tubes from within power boilers for subsequent replacement using a tube-end gap-cutting tool of the type disclosed and claimed in U.S. Pat. No. 5,893,209 granted to Weeks et al. results in an installed boiler tube flared-end segment that although having a longitudinal gap is still retained in the co-operating boiler drum wall. I have discovered that removal of the retained and gapped boiler tube flared-end segment is facilitated if the segment is first properly diametrically compressed prior to longitudinal withdrawal from the co-operating boiler drum or header wall.
Other objects and advantages of the present invention will become apparent from a consideration of the descriptions, drawings, and claims which follow.
SUMMARY OF THE INVENTION
The present invention is basically comprised of a tool head subassembly provided with a rigid frame, with multiple, tubed-end segment rotatable compression jaws carried by the rigid frame for engagement with a boiler tube flared-end, and with a reciprocating cam element that causes pivoting of the tool assembly compression jaws, and of a reversible, pressurized fluid actuator subassembly that is supported by the tool head frame and that causes reciprocating movement of the tool head cam element. Operation of the actuator subassembly in a positive direction, following proper initial engagement of the tool head compression jaws with a cut boiler tube flared-end segment causes the wall of the boiler tube segment to be compressed and “curled” diametrically. The tool may then be conveniently removed from engagement with the boiler tube end segment by simple longitudinal rotation, and the reciprocating cam retracted in preparation for next use of the tool.


REFERENCES:
patent: 3835520 (1974-09-01), Sismore
patent: 3857158 (1974-12-01), Costello
patent: 4967468 (1990-11-01), Vossbrinck et al.
patent: 5205038 (1993-04-01), Archer et al.
patent: 5826334 (1998-10-01), Weeks et al.
patent: 5826335 (1998-10-01), Tegethoff et al.
patent: 5974642 (1999-11-01), Weeks et al.

Affiliated with

Also associated with

Rating

Boiler tube flared-end compression tool does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Boiler tube flared-end compression tool, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Boiler tube flared-end compression tool will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2508658