US1936193A - Locomotive boiler - Google Patents

Description

Nav. 21, 1933. c. G. HAWLEY 1,936,193-

LOGOMOIIVE BOILER Filed Aug. 8, 1932 2 Sheets-Sheet l 000-0- OOOOOOOOOOOOOOOOOOQO000000 O O OOOOOOOOOOOOOOOOOOOOOOO )oooooeoo-o oooooo oooooooooooo oooobcooooooooo' 0000 0000 0000000 0000 no 0 oo o 000 o o o oo o a o o o o o o o o a a o oo o o o o o o o o o oo 0 oo o 000 o oo ooocTo OGOQOOQGOOOOOOOOOOOOOOOO o 9 00 0 0000 0 o o o 0 w &

INVENTOR CHHR E5 6' H BY A'ITORNEY 1933- c. G. HAWLEY LOCOMOTIVE BOILER 2 Sheets-Sheet 2 Filed Aug. 8, 1932 INVENTOR Gm E 6H9 LEY m/ ATTORNEY atented Nov. 21, 193?;

' LOCOMOTIVE BOILER,

har G ll r H i C ca to Locomotive Firebox Company,

1 as nb Chicago, 111.,

a' corporation of Delaware Application August 8, 1932. Serial No. 627,907 Claims. (01. 12268) This invention relates to' improvements in locomotive boilers and it consists of the matters he i after described and more particularly pointed" our in the appended claims. 7

the operation of a siphon equipped locomotive boiler, severe stresses'develop' due to the fact that the movement of the crown sheet and siphon while inthe'same direction, is at different speeds so that their movements are in efiect relatively opposite. This relative movement te'ndstocausi a separation of'th'e parts and in some instances, results in a fracture of the metal. It' is apparent that with a considerable vertical length of side sheets for the firebox, come pared to the like depth of the siphon, that there Will beQa greater movement of the crown sheet than of the siphon, because of the greater amount of material therein subjected to expansion stresses; This situation obtains during the heating up of the boiler but is perhaps more pronounced during the cooling, on period becausethere is added to'the normal relative difference in movement, a greater relative difference due'to the rapid: cooling of the siphon, after. the dumping of a fire, by virtue of large volume of i air. flowing int'o the firebox. This air flow causes a tremendous coolingflaction in the firebox.

One of; the objects of the present invention, therefore, is toin'lprove the structural connection between the crown sheet and associated discharge end of the siphon so as to utilize and increase the flexing possibilities of the crown sheet and siphon sides adjacent the discharge opening of the siphon; Another object of the invention is to provide a structural connection between the crown sheet and siphon of such design that no substantial amount of the weld extends outwardly beyond the side wall of the siphon to rigidify and minimizef' the flexible action of the crown sheet.

Arurtherlobject of: the invention is to provide a structural connection of this kind wherein the openingin the crown sheet for the siphon need not be made toa'n accurate outline but need only approximate the desired outline which may be moreor' 185s uneven vvitha resultant eliminatio'riiotmuch'handlabor' and the reduction of cost of installation. vj I v Again,"t isf nob'jectfof the invention to pro- 5 vide; astructural'connection of this kind whereir'ithe'welding and other necessary installation operations may be carried on entirely from the nr t o' 2 c i v "sen merrier objctof thefinvention is to provideTa construction of this kind which permits the trimming of the top end of the siphon to fit the different types and sizes of fireboxes so that a lesser number of stock sizes of siphons are required.

The above mentioned objects of the invention, as well as others, together with the many advantages thereof, will more fully appear as I proceed with my specification.

In the drawings: Figure 1 is a longitudinal vertical sectional view through the firebox end of a locomotive boiler embodying one form of my invention;

Figure 2 is a transverse vertical sectionalview through the same as taken on the line 2 -2 of Figure '1; I p

Figure 3 is'a horizontal sectional view through the same as taken on the line 3-3 of Figure 1 and discloses the crown sheet in top plan elevation;

Figure 4 is a detail view in top plan elevation of a portion of the crown sheet and more, clearly discloses a structure wherein the openings'therein forthe siphons are of irregular shape or outline;

j Figure 5 is a transverse vertical detail sectional view on an enlarged scale as taken on the line 5'-5 of Figure' i;

Figure 6 is a'longitudinal detail vertical sec tional view as taken on the line 66' of Figure 5;

Figure 7 is a transverse vertical detail sectional view on an enlarged scale as taken on the'line '?-'7 of Figure 3; j ,Figure 8 is a view similar to Figure? and illustrates a modified form of connection between the crown sheet and siphon; and I Figure 9 is also a View similar to Figure '7 and illustrates a further modified form of construction.

In generaL'my invention while addressedto a locomotive boiler, is more particnlarly concerned with the structural connection between the crown sheet and the elongatedhollow wall which forms a siphon. The. wall in this instance, isflan geless.

In accordance with the invention, a longitiidinal opening, one for each siphon to be installed, is produced in the crown sheet. Preferably this opening should be no larger than the insijdefof the siphon top but it may be smaller than the same and it also may be somewhat irregular in outline. In'locating such an opening, itiis pref: erable that the" same be in lin9.With a; row of the radial stays, the bottom endof which stays are removedas with a, torch whenjsaid opening is made. After the opening for each siphon has 7 respectively, of the accompanying thus been made, the efl'ective height of the crown sheet and siphon to be applied thereto, is determined and the siphon (101. is trimmed oiijif necessary, to fit the particular firebox.

After the siphon top has thus been trimmed and fitted, its top edges are charnfered or bevelled or otherwise formed to leave a rather sharp edge extending toward and for engagement against the underside of the crown sheet about the associated opening.

Instead of chainfering or beveiling said edge,

I may turn the edge slightly inward. Thereafter with the siphon suitably supported in position with respect to said opening, a weld line is run around the top edge of the siphon to secure the siphon in place, the welding being thus disposed in the plane of the wall of the siphon so that said welding does not act to resist fiexing of the crown sheet and so that of said welding is exposed to the wearing abrasive action of the products of combustion in the firebox. 7 With a structural connection of this kind, there is no flange on the siphon to stiffen the crown sheet to such an extent that its flexing action is seriously impaired. Thus the crown sheet is capable of such free movement that it does not tend to produce a separating movement between the siphon and the crown sheet. Furthermore it does not so hold either the crown sheet or siphon to such an extent that the production of a fracture is likely.

Referring now in detail to that embodiment of the invention, illustrated in Figures 1, 2, 3 and 7, drawings; 1 indicates the side sheets of a locomotive firebox, that are connected together at the top by an arched crown sheet 2, said sheets extending from the flue sheet 3 to the back sheet t and secured thereto in the usual manner. The firebox shown in Figure 1 is of the type including a combustion chamber 5, the bottom 6 of which joins with the-front throat sheet '7' of the firebox.

'8 indicates the top sheet of the boiler shell that merges into the outside sheets 9 to coact with the inside sheets 1 to form the side water legs 10. Associated with the said sheets is the outside back sheet ii and outside throat sheet 12 to provide the front throat l3 and back water leg 1%. The side water legs, back water leg and front throat are all bottomed by a mud ring 15. The crown sheet is stayed from the top sheet by radial stays 15, arranged in longitudinal and transverse rows and the other sheets are suitably stayed together in accordance with standard 10- comotive boiler practice. 17 and 18 indicate respectively, thermic siphons, there being a pair of si hons 17 disposed in the firebox chamber proper and but a single siphon 13 disposed in the combustion chamber. With such an arrangement of siphons, the combustion chamber siphon is arranged in the median lines of the crown sheet while be others are located one on each side of said line as best indicated in Figure 3. Both siphons are alike structurally, and only differ in shape so that a description of one will suffice for both and both siphons may be secured to the crown sheet in the same manner.

The siphons each include a fiat tubular substantially upright body 19 and a bottom tubular inlet neck 20. The body includes spaced side walls 21-21 and rounded end walls 22 and said walls are staybolted in the customary manner as best shown in Figure 5. These side walls of the body are spaced apart, a distance somewhat less than the spacing between the rows of radial stays 16 where connected to the crown sheet and which last mentioned spacing is about four inches.

In the crown sheet is provided an elongated 30 opening 23 having dimensions no greater than the inside dimensions of the top endof the siphon body and such an opening may be produced along one of the longitudinal lines of stays 16, such stays being burned off at the bottom during the production of such opening as best shown in Figures 5 and 7.

After the opening 23 has been formed in the crown sheet to dimensions in accord with the top end of the associated siphon and after the siphon has been trimmed as to height, the trimmed top edge is next prepared for attaching the same to the underside of the crown sheet about said opening. In Figure 7, I have illustrated one manner of so preparing said edges as by chamfering or bevelling thesame outward as at 24 to form a sharp edge along and around the inside of thesiphon body for engagement or connection with-the crown sheet through the medium of theautogenous weld here shown. When ion the body has thus been fitted, a V-shaped groove is provided in whichis disposed a line of welding 25 to operatively secure the siphon body to the crown sheet.

Instead of bevelling the top edge of. the. body 195 described, I may follow the practice shown in Figure ,9 wherein the top marginal portions'of the body walls are turned inwardly so as to provide bevelled portions 24a. Whensuch an inturned portion is engaged against the underside fig of the crown sheet in operative relation, with respect to an opening 23 therein a V-shaped groove results in which a line of welding 25a is laid to secure the siphon in place.

In Figures 4, 5 and 6, I have illustrated a crown sheet opening 23a which while generally conforming to the top end of the associated siphon, so far as elongation is concerned, is somewhat irregular in shape about its edges. In Figure 4, this irregularity of shape is emphasized in that one opening is wider at one end than at the other end in the other opening, this arrangement is reversed. Thus as best shown in Figures 5 and 6, the edges of certain parts of said openings are spaced inwardly from the inner surfaces of the walls of the siphons. Such walls are bevelled and welded inplace as described in connection with the structure shown in Figure 7.

In Figure 8 is illustrated-a structure similar to that shown in Figure 7 and differing therefrom only in the fact that the opening 23 instead of being formed'to each sideof arow of radial stays is formed between two rows of such stays, the bottom ends of which are burned off as with atorch. In such an arrangement a greater distance is provided between the line of welding attachment 25 between the siphon and adjacent rows of stays so that greater fiexibilit in the crown sheet is thus aiforded.

With the arrangement described',that'portion 1'40 of the crown sheet adjacent the siphon is more flexible than in a constructionincludingasiphon with a top end flange and therefore, theicrown sheet is increased in flexibility to the highest degree it is possible to attain without sacrificing safety. i r I When firing up, the crown sheet because ofits area and shape, movesfaster than the siphon and flexes to compensate for the relative movement between the two. When the fire is drawn sheet and thus we have a second movement which is in the opposite direction and which movement is also relative between the crown sheet and siphon. The movement of the crown sheet to one side and the other of its normal position is best shown in dotted lines in Figures 5, '7 and 8, respectively.

With the arrangement described, the relative movement cannot produce separation between the crown sheet and siphon because of the increased flexibility of the crown sheet and hence cracking or fracture of the metal sheets is prevented.

Specific reference has been made to the thermic siphon, a well-known water circulating and steaming wall, but it should be understood that the invention may be'utilized in water circulating and steaming walls of other shapes.

Hence, while in describing my invention, I have referred in detail to the form, arrangement and construction of the various parts, the same is to be considered merely as illustrative so that I do not wish to be limited thereto except as may be necessary by limitation in the appended claims.

I claim as my invention:

1. The method of installing a water circulating and steaming element in the firebox of a locomotive type boilerhaving a stayed crown sheet, which consists in providing a hollow water circulating and steaming wall having an elongated fiangeless top, cutting an opening in the crown sheet smaller than the outside dimension of the top end of the wall, placing the wall with its top end surrounding said opening and substantially in the plane of the underside of the crown sheet, and completing the installation by welding the top end of the wall to the underside of the crown sheet.

2. The method of installing a water circulating and steaming'element in the firebox of a locomotive type boiler having a stayed crown sheet, which consists in providing a hollow water circulating and steaming wall, having an elongated fiangeless top, cutting an opening in the crown sheet smaller, at least in part, than the outside dimension of the top end of the wall, cutting away end portions of the stays that support the crown sheet portion being removed, placing the wall with its'top end surrounding said opening and substantially in the plane of the underside of the crown sheet, andcompleting the installation by welding the top end of the wall to the underside of the crown sheet.

3. In combination with a firebox, a siphon positioned therein and having an elongated top, said firebox including a crown sheet resting upon edge portions of said siphon top and the crown sheet having a slot of less width than the width sheet having an elongated slot therein communiof the siphon top, and a line of welding connecting said siphon edge portions to the crown sheet.

4. In combination with a firebox, a siphon positioned therein and having an elongated top, said firebox including a crown sheet resting upon edge portions of said siphon top and the crown sheet having a slot of less width than the width of the siphon top, and a line of welding arranged in the plane of the intersection of said siphon edge portions and crown sheet respectively, for operatively connecting them together.

5. In combination with a firebox, a siphon positioned therein. and having an elongated top, said firebox including a crown sheet resting upon edge portions of said siphon top and the crown sheet having a slot of less width than the width of the siphon top, said edge portions and crown sheet being formed to coact in providing a substantially V-shaped groove, and a line of welding arranged in said groove for securing said siphon and crown sheet together. p

6. In combination with a firebox, a thermic siphon therein having an elongated top, said firebox including a crown sheet resting upon the top of the siphon and having a slot of less width and length than said top, the siphon and crown sheet being formed about said slot to coact in providing a V-shaped groove about the edge of said siphon top, and a line of welding in said groove for securing said crown sheet and siphon together.

TI. In combination with a firebox, a thermic siphon therein having an elongated top end formed to provide a bevelled edge, said firebox including a crown sheet resting upon said edge and having a slot therein of a less width and length than said top end, and a line of welding connecting said crown sheet and siphon top end together.

8. In combination, a siphon having an elongated top portion and a crown sheet resting upon said top portion, said crown sheet having an elongated slot therein of a less width and length than said siphon top portion and arranged to communicate with the inside of said elongated top portion and welded thereto. e

9. In combination, a siphon having an elongated top end defined by a bevelled edge, and a crown sheet resting upon said edge, said crown eating with the inside of said topend of the siphon, and said top end of the siphon and the crown sheet being welded together.

10. In combination with a thermic siphon hav-' ing a top portion, a crown sheet resting thereon and having a slot of less width and length than said top portion of the siphon and connected thereto by a line of welding.

CHARLES GILBERT HAWLEY.

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