US1252585A

US1252585A - Boiler-flue ferrule.

Info

Publication number: US1252585A
Application number: US9966116A
Authority: US
Inventors: Aloysious J Kinnane
Original assignee: Individual
Current assignee: Individual
Priority date: 1916-05-24
Filing date: 1916-05-24
Publication date: 1918-01-08
Anticipated expiration: 1935-01-08

Description

l A.1.K|NNANE.

BOILER FLUE FERRULE.

APPLICATION FILED MAY 24|19l6K 1 ,252,585` Patented Jan. 8, 1918.

aperture, 3, in said sheet.

STATES ri'iiau'iy OFFICE.

torsione numana oir K NoxvILLE, TENNESSEE.

BOILER-FL'UE FEBBULE.

Bpecicatlbn o! Letters Patent.

Patented J an. 8, 1918.

To all whom it may concern:

Be it known that I, ALoYsroUs J 'K1N- NANE, a citizen of the United States, residing at Knoxville, in the county of Knox and 4State of Tennessee, have invented a new and useful 'Improvement in Boiler-Flue Ferrules, of whichthe following isa specification, rcferencebeing had to the accompanying drawing.

My improvement relates particularly'to means for securing the ends of the flues of` tubular boilers in the flue sheets.

The object of my improvement is to reinforce the ends of the fiue tubes for the purpose of adding strength thereto and also to form a seal between the en d portions of the tubes and the adjacent sheet. A further object of the improvement is to shield the end portions of the tubes from the destructive physical and chemical action of thecombustion products passing through the flues..

My improvement may be applied to new steam boilers while they are beingbuilt, or it may be applied to individual tubes as leakage may make demand from time to time.

In the accompanying drawings,`

Figurel is a side elevation of used in applyin my improvement, a portion of said mem er being broken away;

Fig. 2 is an elevation looking toward the rightof Fig. 1, a portion being broken awa Fig. 3 is a section along the axis of a tu e showing one end of the tube inposition in a sheet and having my improvement applied thereto;

Fig. .4 is an' elevation of a portion of a sheet with my improvement applied thereto,

a portion being broken away' Fig. 5 is a detail section illustrating another from of `the construction, Referring to said drawings, 1 is a part of a flue `sheet of a tubular steam boiler of any ordinary form, and 2 is a flue tube of ordinary form and lhaving one end resting in an Outside of the sheet,the tube has a bead or flange, 4, of ordinary form bearing against the outer face of the sheet. A shoulder, 5, on the tube, engages the inner face of the sheet, so that the sheet is engaged by the bead or flange, 4, and the shoulder, 5. V

.The tube may be inserted and flanged in the flue sheet in the usual manner by means of tools suited to this purpose'.

It is well-known, that, in the use, of such a membery the end of the tube, and that it is difficult to remedy this defect. Such leakage may be due to thermal expansion or contraction, to

My improvement consists in applying to the tubeand the end of thesheetthe reinforcing member, 6, shown by Figs. 1* and 2. Said member comprises va tubular body, 6, and a flange 6b the tubular body being cylindrical an o 'as large exterior diameter as will permit sliding endwise into the tube, 2, while the flange, 6" rests on the flange, 4, of the tube, 2. The edge of the flange, 6", is preferably tapered as shown. The inner edge of the body, 6, is also preferably tapered or reduced in thickness, as shown.

, When the member, 6, has been moved into the flue, 2, asfar as permitted by the flange, 4, the'inner edge of the tubular body,6, is welded to the inner face of the llue,2, along the area, 7, and the flange, 6", of the member, 6, is welded to the flange, 4, and to the welding metal, 8, applied by fusion to the said three members. Thus said three'members and said mass of'welding metal, '8, are effectively united into substantially a single mass-affording ample strength and stability. In 'the manufacture of new boilers, the flue, 2, may be secured in the sheet, 1,' in the usual manner and with the usual care, with aview to avoiding leakage. The member, .6, may then be inserted and secured within and outside the flue, as above'described. i

4 When thus secured, the member, 6,.serves in several ways: (a)r by reducing strains on theflueand the sheet relative to each other; (b) the adjacent end portion of the flue is protected against the chemical and physical action of the highly heated combustion prducts passing through said flue, such action,

when not prevented reducing saidV 'tubes by corrosion or burning or abrasion, until the tubeI has been weakened to such extent as to cause yielding away from the sheet and thus permitting leakage or to form places in the flue wall so thin as to ermit water or steam in the boiler to brea' through; V(c) by preventing the escape of steam on water from the boiler, even when there is leakage at the sheet opening in which the tube rests.

While the welding area may be extended ...to any desired degree, it is preferable to do lons4 such welding only along the edges of the rei inforcing member, leaving other portions of said member free from the tube, in order that heat absorbed by the reinforcing member will be less rapidly transmitted to the flue, and in order that expansion nd contraction and strain in the reinforcing member or in the flue will to the smallest degree affect ,the companion member.

1f my improvement is applied only for the ,purpose of stopping leaks in boilers already iin service, the member, 6, is applied, in the manner already described, at the end of any flue at which there is leakage and which has undergone such deterioration as to make mending by the use of expandin and beading tools difficult or impossible. t Will be observed that in such cases defects in the flue and in the sheet, 1, between the weld areas, 7 and 8, are substantially immaterial; for the reinforcingr member, 6, forms a supplemental wall between said areas.

The member, 6, is preferably made 0f a metal differing from the metal of the flue and the sheet, for example, a variety of cast iron which is strong and which at the same time expands and contracts to `la minimum degree under thermal variations.

The welding may be performed by the aid of heatproduced by electricity or by means of gas flames adapted to produce high temperature. i

The wall of the body, 6*, is made as thin as the demand .forstrength permits, in order that the caliber of the flue will be reduced as little as possible.

When the improvement is to be applied to new boilers, the portion of the ilue adjacent the sheet may be increased in diameter by forming an offset, 9, around the Wall of the tube, as shown inFig. 5, the body, 6, of the reinforcing member, 6, then lying inthe enlarged portion of the flue and the inner face of said reinforcing member being approximately flush with the inner face of the flue beyond the offset, 9, and the inner edn'fe of said-body y extending preferably to said offset, sotliat the weld area, 7, will be formed at said offset. When the reinforcing member is to be applied to -boilers already built, the ends of the fines may be enlarged through a distance equaling the length of said member, asI described in this paragraph relative to new boilers, by the use of expandingtools before theJv reinforcing member is inserted.

claim as my invention, 4 -1. The combination with a' flue sheet and a flue extending through said sheet and having a bead at its outer end, of a reinforcing member entering the flue and having a flange extending partially acrdss saidA bead, and a mass of welding metal fused to said flange and the bead of the flue and to the outer face of the sheet, substantially as described. 2. The combination With a flue sheet and a flue extending through said sheet and having a bead at its outer end, of a reinforcing member entering the flue and having a flange extending partially across said head, and having'its inner end Welded to the flue, and a mass of Welding metal fused to said flange and to the bead of the flue'and to the outer face of the sheet, the intermediate portions of said reinforcing member being left free from the ilue, substantially as described.

3i The combination with a flue sheet and l a flue extending through said sheet and havmg a bead at its outer end, of a reinforcing' member composed of a metal differing from.

the metal of the flue and the sheet and enter ing the flue and having a flange extending partially acrossv said bead,and a mass of welding-metal fused to said flange and to the bead ofthe flue and to the outer face of the sheet, substantially as described.

4. The combination with a flue sheet and a flue extending through said sheet and having an enlarged portion and a'bead at its outer end, of a reinforcing member entering the flue and resting in said enlarged portion and having a flange extending partially `across said bead and having its inner end Welded to the flue, and a mass of welding metal fused to said flange and to said beadof the flue and tothe outer face 'of the sheet, the intermediate 'portion'- of the -reinforcing member being free from the flue, substantially as described. v

' In testimony whereof I have signed'iny name, in presence `of two Witnesses, this 20th day of May, in the year one thousand nine hundred and sixteen.

ALoYsIoUs J. inhuman.v