US1704145A

US1704145A - Method of repairing siphons

Info

Publication number: US1704145A
Application number: US754029A
Authority: US
Inventors: John L Nicholson
Original assignee: Locomotive Firebox Co
Current assignee: Locomotive Firebox Co
Priority date: 1924-12-05
Filing date: 1924-12-05
Publication date: 1929-03-05
Anticipated expiration: 1946-03-05

Description

March 5,1929. J. L. NICHQLSQN 1,104,145

METHOD OF REPAIRING SIPHONS- Filed nec. 5. 1924 Patented Mar. 5, 1.929.

UNITED STATES: PATENT oFFicE.

JOHN L. NICHOLSON, 0F CHICAGO, ILLINOIS', ASSIGNOR IO LOCOMOTIVE IREBOX. COM.'-

PANY, OFCHICAGO, ILLINOIS, A CORPORATION OF DELAWARE.

METHOD or REPATBING Siri-1011s.

Application led December 5, 1924,.'l Serial No. 754,029.

This invention relates to improvements in methods of repairing siphons and consists of` the matters hereinafter described and more particularly pointed out in the appended claims. l

The term Siphon as herein used designates a flat, hollow substantially triangular structure or element particularly adapted for use in locomotive boilers for increasing the Water circulation and .steaming efficiency thereof. Such an element or thermic siphon is fully shown and described in my prior patent No. 1,337 ,720 of April 20, 1920, and said element is located in the firebox of the boiler.

" It generallyincludes atubular bottom portion which terminates in a tubular eXtension or neck which is connected to the inner4 throat sheet and, has a flat hollow body with an elongated discharge mouth, which, opens through the crown sheet of the firebox. Being arranged in the iireboX, as ust mentioned, said tubular neck andadjacent body parts of the Siphon which, by reason of being located substantially close to the fire bed on the grate bars, are subjected to the impingement or bombardment of the products of combustion as they pass from the fire bed to the boiler fiues. This action of the products of combustion produces a real mechanical wear upon' said parts which being assisted by the continuous expansion and contraction under temperature changes, reduces the life of 'this portion o f the siplion below that of the main body partthereof.

vIl() out By reason of their peculiar construction, said siphons are not only diiicult to make, but due to the care in which they must be installed, they cost considerable. Heretofore such a` worm siphon presented quite a problem. The major portion thereof `is still serviceable, but the remaining portion is worn yto that degree where safety demands itsv repair or the replacement of the entire siphon by a new siphon.\ The replacing of i' i a siphon not only requires a great deal of time and labor to remove the worn siplion but also requires time and labor to reasseinble and reweld the new one in place, thus causing a loss of service in said locomotive.-

My present invention relates toa methodl of repairing such worn siphons,I which method Vmay be readily and economically carried ne of the objects of the present invention is to provide a simple and efficient method service delay of the locomotive to a minimum.,

Other objects of theinvention as well as the many advantages thereof will more fully appear as I proceed' with my specification.

In the accompanying drawings:

Fig. 1 is a viewin side elevation of a siphon element showing the same as it appears relative to the throatslieet and crown sheet of the firebox of aplocomotive boiler in which is installed.l

Fig. 2 is a view in side elevation on an enlarged scale ofthe siphoiielement after having been repaired by means of my improved method.

Fig. 3 isa perspective view of my improved half-Siphon or repair element as it appears ready for attachment to a siphon body, after the worn part has been removed.

l Fig. 4 is a detail sectional view as taken oii'the line 4 4 of Fig. 2. i

Fig. 5` is a another detail sectional view as taken on the line 5-*5 of Fig. 2 and shows the relation of the side walls of the repair 4element to the sidewalls of the Siphon body.

Fig.v6 is a horizontal section on an enlarged scale as taken on the line 6--6 of Fig. 2 and shows. the position of a reinforcing liner at the )oint between the siphon body and repair. element 'at the front end of the siphon.

Referring now in detail to that embodiment ofthe invention illustrated in the drawings, l indicates the crown -sheet of a locomotive rebox, 2 the inner front throat sheet and 3 1 dicates as a whole a Siphon or water steamin and circulating' element installed in the rebox and secured in said crown sheet and front throat sheet, as will soon appear. As described in my patent hereinbefore referred to, said Siphon or element in- -cludes an upwardly and rearwardly inclined tubular bottom or neck portion 14, and a progressively upwardly enlarging and generally ytriangularilat hollow body port-ion 5. The

phragm plate 7 securedin a. suitable opening provided therefor in said throat plate. The

neck projects into-the diaphragm plate and is preferably welded therein, said plate accommodating t-he expansion and contraction of said element under temperature changes. The hollow body portion 5 comprises

parallel side walls

8 and 8? which are spaced apart a distance less than that approximating the diameter of the tubular or bulged portion t which gradually is reduced in width as it approaches the top end of said side walls 8-8. Said walls terminate in an outwardly extending flange 9 which is welded into an opening in the crown sheet 1 provided therefor. The front end of the body 5 is defined by a transversely rounded wall 10 which is inclined forwardly and upwardly from the neck 6 asshown and to which it is connected by a curved elbow part 11. Such an element is formed by a single piece of heavy sheet metal folded upon itself with the median line of the tubular part 4 as the line of the fold, the two parts of the `element meeting and being welded in a line defining the middle portion of the front walLlO, as shown at 12 in Fig. 4. The top end of the element, inside the flange 9 provides a discharge mouth which opens through the crown sheet to discharge water and steam into the boiler space above the saine. The side walls of the siphon element are suitablystay-bolted to withstand both internal and external pressures and the said stay-bolts 13 are so disposed as to eX- tend in rows parallel with lines defining the outlines of the element asa whole. The neck portion 6 is also stay-bolted as at 14.

In service the lower portion and bottom end of the body 5 together with the neck 6 is subjected to the greatest wear for the reasons before stated. Although the siphons are in active use for a long period of time, before this wear is manifest, inspections thereof from time to time will determine when said element should be repaired. Vhen said repair is to be made the worn part of the siphon or element is removed by cutting the same away as for instance with a torch, along the dotted lines 15 and 16 as shown in Fig. 1, so that one side wall is of a greater vertical height than the other, one line of cutting (15) being arranged in a plane above and the other line of cutting (16) being arranged in a plane below that of a predetermined row of stay-bolts as, for instance. the

- row indicated b v the number 13a. Said linesI of Cutting pass through the tubular portion l in a common plane at a right angle to said portion as indicated at 17. i After said siphon has been eut away as described the stay-bolts 13 are removed leaving a corresponding row of stay-bolt holes in the bottom of the longer side wall 8. The neck 6 is then removed from `its engagement in the diaphragm 7 or said diaphragm may be removed from the throat sheet, either way as desired, depending, of course, upon the condition of the diaphragm.

To take the place of that worn portion of the Siphon which has been removed, as above described, I provide a renewal or repair boot or section which is substantially a duplicate of the removed part of the siphon except that I prefer to make the neck thereof a trifle longer so that it may be trimmed to fit the old or new diaphragm plate 7, whichever the case may be. In Fig. 3 I have shown a perspective view of said repair boot or section before it has been installed in place. Said boot or. section comprises a tubular portion 4 which terminates at one end in a tubular lneck 6a. Said tubular portion has parallel ends 8d of the side walls 8b and 8 of the boot are left spaced apart for a distance to leave an opening 8e, the purpose of which will ap pear later, but below said opening said sideu walls meet in an elbow curve 11a and are welded together to provide a seam 18 which eX- tends to the end of the neck 6a. Such an element when positioned in place with respect .to the cutaway portion of the Siphon 3 will be made to fit nicely therein but before applying the same thereto, I find it desirable to apply a liner 19 to the bottom end of the end wall 10, as shown in dotted lines in Fig. 2. In applying this liner I chip out a part of the old weld or seam and after inserting the liner and securing the same therein as by the screw plugs 20-20 I reweld said seam. The bottom end of this .liner is left to project .below the bottom end of the end wall 10 for a pur pose to appear later.

lVhen the repair boot or element and the Siphon body are properly fitted, they may be jacked up or otherwise temporarily held together and the abutting edges of the side walls 8-80 and 81-8" are welded together as indicated as at 21-22 (see Figs. 2 and 5).

After this has been done, the parts 9 8 of the walls SQL-8 of the repair hooi are worked around or are folded' in toward each other from the row 13aL so that said row of new stay-bolts will be located in a plane between that of the lines of welding 21-92 as liest shown in Fig. 5. The neck 6a of the boot is l am able to provide a stronger connection or bond between them because the lines of welding 21-22 instead of being in the same plane,

' my new method, the operations may be carried on inside the firebox and the worn Siphon part p may be removed through the fire door opening and a new one introducedinto the firebox through said door. Thus, no boilerv stay-bolts are unnecessarily disturbed.

llVhile in describing my invention,'l have` referred to certain details of construction, steps in operation and the like, the same iS to be taken as by way of illustration only and therefore l do not wish to limit myself thereto except as may be pointed out in the appended claims.

lt claim as my invention:

1. riihe method of repairing a water steaming and circulating element of a boiler which element has parallel Side walls Stay-bolted together, Said method consisting ,inl removing the worn portion of said element along lines arranged in different planes on opposite side of said element, in providing-a. new part corresponding to Said removed part andv fitting' 'the same tothe remainder oi Said element and thereafter welding the iitted parts together.

2. The method of repairing a water steaming and circulating element of a boiler which c element has parallel side walls stay-bolted together, said method consisting in removing the worn portion of said element along' lines arranged in dii'erent planes on opposite side of said element, in providing a new part having Side Walls and fitting said side walls 'to the side Walls of the remainder of the elethe worn of said element, in providing a new part corresponding to said removed part and fitting the same to the remainder. of said element, in welding the abutting edges ofsaid new part and remainder together and in then providing a row of stay-bolts which connect thesides oit' said new part and the sides' of said remainder together in a plane between said lines of welding.

4. The method of repairing a water steaming and circulating element in a locomotive connected to the inner throat sheet of the {ireboX, which method consists in cutting away the worn part of said element along lines arranged in diiierent planes on opposite side walls of the element and in removing the neck from said throat sheet, in providing a new part to take the place of the removed part and which new part has side walls which are iitted to the side walls of the remainder anda neck, in then welding said fitted edges of the side wall together in abutting relation and then welding the neck of the new part in position with respect to said throat sheet.

5. The method of repairing a water steaming and circulating element in a locomotive ireboxA which elementv comprisesl parallel spaced, stay-,bolted side walls connected to the crown sheet of the rebox and a tubular `firebox which element comprises parallel" spaced, Stay-bolted side walls connected to the crown sheet of the firebox and a tubular neck neck connected to the inner throat sheet of the fir-ebox, which method consists in cutting away the worn, part of said element along lines arranged in diiferent planes on opposite side walls of the element and in removing the neck from said throat sheet, in providing a lnew part to take the place of the removed part and which new part has side walls which are fitted to thefside walls of the remainder and a neck, in then welding Said fitted edges of the side walls together in abutting relation and in then providing a row of stay-bolts between one side wall of the new part and one side wall of the remainder which.

`the firebox, a rounded end wall and a tubular bottom portion which 'terminates in a neck connected to the inner throat sheet of the firebox, which method consists in cutting away part of said elements alonga line extending through the tubular portion, the side walls and the rounded end `wall of said element in removing said neck from said throat sheet, in securing a liner to the bottom end of the said rear wall so that a part of the liner projects below said bottom end ot said wall, in providing a new part to take the place oi the removed part and in fitting the edges thereof to the edges of said re-` mainder, in welding said par-ts together along lines defined bysaid itted edges, in then securing'a-portion of said new part to the projecting bottom end of the liner and then securing the neck oi' said new part in place with respect to said throat plate.

7. The method of repairing a water steaming and Circulating element in a locomotive livebox, which element has parallel staybolted side walls connected to the crown sheet of the tirebox, a rounded end'wall and a tubular bottom portion which terminates Vin a neck connected to the inner throat sheet of the lirebox, which method consists in cutting away the worn part of said elements along a line extending through the tubular portion, the side walls and the rounded end wall of said element in removing said neck from said throat sheet, in securing a liner to the bottom end of the said rear wall so thata part of the liner projects below said bottom end of said wall, in providing a new part to take the place ot the removed part and in tting the edges thereof to the edges of said remainder, in welding said parts together along lines dened by said fitted edges, in folding por! tionsof said new part over upon and securing them to said projecting end of the liner and in then securing the neck of said new part in place with respect to said throat plate.

8. An element of the kinddescribed comprising a body portion having side walls and a second portion including a neck and having side walls, the edges of which are formed to fit the contour of theedges of the side walls of said body portion, said edges being arranged parallel butin different planes, a line of weld connecting said edges together and a line of stay-bolts arranged parallel with but intermediate the lines of welding and con-I necting the side wall of the body portion with an opposite side wall of said second portion.

In testimony whereof, I have hereunto set my hand, this lst day of December, 1924.

JOHN L. NICHOLSON.