US1732304A

US1732304A - Locomotive boiler

Info

Publication number: US1732304A
Application number: US560661A
Authority: US
Inventors: Hawley Charles Gilbert
Original assignee: Locomotive Firebox Co
Current assignee: Locomotive Firebox Co
Priority date: 1922-05-13
Filing date: 1922-05-13
Publication date: 1929-10-22
Anticipated expiration: 1946-10-22

Description

Oct. 22, 1929. c, HAwLEY 1,732,304

LOCOMOTIVE BOILER Filed May 13. 1922 l 2 Sheets-Sheet 1 Oct. 22, 1929. c, Aw 1,732,304

LOCOMOTIVE BOILER I Filed May 13. 1922 2 Sheets-Sheet 2 I III.

Patented Oct. 22, 1929 FUNITED' STATES PATENT: OF

BOX COMIPANY, OF CHICAGO, ILLINOIS A CORPORATION OF DELAWARE LOCOMOTIVE BOILER.

Application filed May 13,

cause or set up a positive fore-and-aft circulation of the water in the boiler.

My invention comprises a locomotive firebox in combination with a hollow vertical water wall of inverted triangular form which hangs from the crown sheet of the firebox and extends longitudinally in the firebox from a position near the flue sheet thereof to a point near the back end or head of the firebox. To this wall I connect a plurality of water feeding tubes. These preferably extend from the side water legs of the firebox to and into the bottom of the water wall. Said bottom of the wall is inclined upwardly and rearwardly and the connecting tubes, as a group or groups, while in themselves substantially horizontal, conform to the inclination of the bottom of the water wall. Thereby the wall is supplied from numerous points in the side water legs from different elevations therein.

An important incident of my invention is that these supply tubes are extended nearly to the outside shell or wrapper sheet of the firebox,

taking water therefrom rather than from the side sheets of the firebox, thus avoiding any confusion or congestion of water currents which might occasion difliculty with the side sheets stay-bolts. A further lll'lPOItZtl'ltlIlCldent of the invention is the combination, with the described supply tubes, of a sectional firebrick arch for which said tubes provide ideal supports.

The foregoing and other features of my in vention will be readily understood on reference to the accompanying drawings, in which Fig. 1 is a-vertical cross section of a locomotive firebox of the narrow type; embodying my invention; Fig. 2 is a like view of a wide.

firebox. embodying my invention; Fig. 3 is a vertical longitudinal section substantially on either of the lines 33 of Figs. 1 and 2; Fig. 4 illustrates a modification of the invention wherein two vertical water walls are employed with a peculiar arrangement of the water supply tubes; Fig. 5 is a longitudinal 1922. Serial No. 560,661.

section thereof on either of the lines 5-5 or 5'-5 of Fig. 4;Fig. 6 is a further modification of the invention; Fig. 7 is a vertical section thereof on the line 7'-7 of Fig. 6; Fig. 8 is a partial transverse section on the line 8-8 of Fig. 7; Fig. 9 is a transverse section showing still another form of the invention; Fig. 10 is a section thereof on the line 1010 of Fig. 9 Fig. 11 is a horizontal section enlarged ,taken on any of the lines 11 of the several figures; Figs. 12 and 13 are sectional details, showing different ways of securing the supply tubes in the water walls.

I have herein shown fireboxes of different shapes or types in order that it may be clearly understood that my invention is applicable to all thereof. All forms of the invention are much the same, notwithstanding slight modifications of shape. or assembly as between water wall and the water feeding and arch supporting tubes. illustrated in Figs. 1, 2 and 3, wherein A represents the hereinbefore mentioned hollow water Wall. As shown in Fig. 3 this wall is stay-bolted throughout and is of substantially triangular form. Itsfront end or edge A is set back far enough from the flue sheet 2 of the firebox to permit necessary work to be done onthe flues of the boiler. The rear end of the wall A reaches almost to the back sheet 3 of the firebox; thus a wall of large area is secured. Sufiicientfiring clearance 4 is allowed between the grate (not shown) and the lower end or inverted apex A of the wall. 'As shown in Figs. 1 and 2, the wall is positioned midway bet ween the

side sheets

5, 5, of the firebox. As suggested by the several figures, the tubes B (above mentioned) may be of various lengths and shapes. A plurality of such tubes is provided on each side of the wall and each tube serves to connect a side water leg 6 of the boiler with the interior or the water wall- A. As well shown in Fig. 3 the tubes enter the wall close to the inclined bottom thereof. Hence, the series or groups The simplest forms are CHARLES GILBERT HAWLEY, 0F QHICAGO, ILLINOIS, ASSIGNOR TO LOGOMOTIVE FIRE- of tubes, as a whole, has the same, or substanv which, as well known, constitute a sectional fire arch or baflie of a form which is most convenient and desirable.

As clearly shown, the outer ends of the tubes extend considerably beyond the side sheets of the firebox and almost to the wrapper sheet or boiler shell 7. Thus, the tubes and the water wall are caused to draw Water from points adjacent the shell rather than from points adjacent the fire sheets of the fire box. As well known, when the boiler is under fire there is a rapid rise of water adjacent each side sheet and concurrently a well defined downward flow of cooler water adjacent outer or wrap per sheets 7. It is this cooler supply which is taken into the water wall through the connecting tubes B. By this simple expedient I avoid all possibility of interference or congested water or steam pockets upon the side sheets; and thus avoid all difliculty'with the side sheets and the many stay-bolts therein.

In Figs. i and 5 I have illustrated two of the water walls D, D, with a peculiar set of connecting tubes which serve to support the arch brick C and by which each water wall is supplied with water from both water legs of the boiler. In this arrangement the lower tubes E areindividual to respective walls D. From that point upward the tubes are alternately individual, first to one and then to the other of the walls, thus the tube D extends from the side water leg 12 to the left-hand water wall D; the tube D extends from the lefthand water leg 12 to the left-hand water wall D. This condition is reversed as to the next set of tubes D and D which are joined to the right-hand water wall D. An incident of this construction and one of very considerable importance is depicted in Fig. 5, to wit, the arch as a whole is deeply corrugated by many and variously positioned pockets 13. Such an arch serves to thoroughly admix the gaseous combustibles which flow upward and rearward from the fuel bed, following the direction of the arrOWSlt in Fig. 5. This positive admixing effect of the arch is also to be observed from Figs. 1, 2 and 3, wherein the arches may be regarded as being composed of the tubes and firebrick, also as shown.

Fig. 6 is like unto Fig. 4, but comprehends only individual row or series of tubes F for each water wall G. These tubes support firebrick 15 as shown in Fig. 7, the same constituting the desired arches'in the side passages. The middle passage, namely the space between the two walls G, is occupied by a middle row of firebrick H, which may be supported from studs 16 projecting from the walls G.

The structure of Figs. 9 and 10 differs from the others in that only one largewater tube I is employed for the one or more water walls J. This tube, as shown in Fig. 9, may extend from side toside of the firebox, in which case it should be applied thereto through the medium of the diaphragm plates 17 Or the bolt 19, extending from the inner side of the water wall to the shell of the boiler. The structure of Fig. 8 is also appropriate to one or all of the tubes of Figs. 6 and 7.

the structure of the water wall, are self-explanatory. Wallis'marked 20, the supply tubes are marked 21 and the stay-bolts of. the wall are marked 22.

. Various modifications of my invention will readily suggest themselves to one who is skilled in the art, and therefore I do not limit the invention to the precise shapes, constructions and combination of parts herein shown.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

In combination with a locomotive boiler having a firebox including a crown sheet and side sheets, a flat tubular water wall arranged longitudinally of the firebox and depending from and opening through the crown sheetthereof, said water wall having an upwardly In each of these figures the water The detailed Figs. 11, 12 and 13 illustrating I and rcarwa'rdly inclined bottom wall, and a