Mining or in situ disintegration of hard material – Hard material disintegrating machines – Rotary cutter head with advance direction coincident or...
Patent
1990-01-12
1992-03-17
Bagnell, David J.
Mining or in situ disintegration of hard material
Hard material disintegrating machines
Rotary cutter head with advance direction coincident or...
15243, 29 8105, 241277, 299 90, B08B 902, B28D 118, F23J 302
Patent
active
050962620
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to an apparatus and method for enlarging the cross section of a chimney flue by removing wall material from the flue walls by means of a milling.
It is a constant task for chimney sweeps, boiler cleaners and other pipeline cleaning personnel to clean flue gas deposits out of exhaust gas pipes and to re-establish the original inner cross section of such pipes. This is sometimes done manually, sometimes by means of motor-driven servo supports. Even more stubborn deposits can be removed with relatively little effort so that generally brush-like cleaning tools and relatively weakly designed servo motors are sufficient. An example for cleaning flue gas pipes in a boiler system is disclosed in FR-A 2,074,527. In this prior art device, a cleaning brush is introduced into the boiler pipe to be cleaned together with a pneumatic motor driven by compressed air. The device here does not operate in the manner of a milling device but in the manner of a radial grinder (see also DE-A1 2,953,685 which works with a scrub brush).
Much more difficult is the cleaning of chimneys in old buildings in need of restoration. This is what the invention relates to exclusively.
The need for restoration may here have very different reasons. Thus, only as an example, the original pipe for carrying the flue gas may have become inoperable due to soot deposits, cracks, brittleness, permeability to flue gases, loss of thermal insulation or insufficient thermal insulation according to recent evaluations, or for other reasons. Or the inner lining layer that had been introduced in a first attempt at restoration may have been or become useless. Finally, in still properly operating chimney structures, a change in the inner cross section may be desired. In all these cases, a new inner pipe (called lining) for carrying the flue gas must be drawn into the chimney requiring the restoration, in certain cases so as to provide an additional radial space outside of this inner pipe to be drawn in, be it because of the necessity of introducing a thermal insulation layer at the same time, be it in order to provide space for some other purpose, for example for ventilation. Now the new inner pipe for carrying the flue gas must have a predetermined inner and thus also an outer diameter whose order of magnitude is predetermined, so that generally it is impossible to draw a new inner pipe for restoration into the already existing inner diameter of the chimney requiring the restoration. Therefore, it is necessary in all these cases to remove at least the present inner flue gas shell in the chimney requiring restoration before restoration pipe elements are inserted. In many cases of multi-shell chimney construction, the entire original inner flue gas carrying pipe will have to be removed. In other cases, as in the above-mentioned example of further restoration after a prior, failed restoration attempt, it may suffice to remove a centrifuged layer or the like, possibly together with edge zones of the original chimney structure.
Moreover, the materials of the interior pipes of existing chimneys and of the layers requiring restoration and being included therein are very different and almost always very resistant. Only as an example, older chimneys are constructed from natural or artificial stone, e.g. certain bricks, or are molded of concrete as single-shell molded pieces, particularly from concrete having thermal insulation properties. In more recent chimney constructions, the flue gas carrying interior pipes are often made of different quality fire clays up to glass, ceramic and high-grade steel pipes. In older chimneys, the lining of the inner pipe has also been formed of component similar to ceramic tiles.
Additionally, chimneys are not infrequently set in sections onto floor breakthroughs so that, for example, actual structural material such as, for example, concrete from floors or ceilings of rooms and reinforcement elements embedded therein, including iron reinforcements extend into the inner cross section of
REFERENCES:
patent: 1293777 (1919-02-01), Hogue
patent: 1558596 (1925-10-01), De Fontaine
patent: 1569203 (1926-01-01), Rice et al.
patent: 1592268 (1926-07-01), Hill
patent: 1899727 (1933-02-01), Sandstone
patent: 2095725 (1937-10-01), Whealy
patent: 2175406 (1939-10-01), Osborn
patent: 2232018 (1941-02-01), Wright
patent: 2275939 (1942-03-01), Baker
patent: 2497659 (1950-02-01), Davis
patent: 2641791 (1953-06-01), Wells
patent: 2889612 (1959-06-01), Joosepson
patent: 2937008 (1960-05-01), Whittle
patent: 3480092 (1969-11-01), Reinold
patent: 3562836 (1971-06-01), McGee
patent: 3669199 (1972-06-01), Cullen et al.
patent: 4222445 (1980-09-01), Vadetsky et al.
patent: 4509701 (1985-04-01), Jack et al.
patent: 4520524 (1985-06-01), Long
patent: 4603747 (1986-08-01), Golden
patent: 4678045 (1987-07-01), Lyons
LandOfFree
Device for enlarging a chimney does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device for enlarging a chimney, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for enlarging a chimney will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1471527