US1266184A - Locomotive-boiler superheater. - Google Patents

Description

H. S. VINCENT. LocoMoTwE BOILER SUPEHHEATER.

x APPLICATION FILED NNE l2, 19H. 1,266,184.

Patented May14,1918.

NV TDR @IWW HARRY S. VINCENT, 0F BIDGEWOOD, NEW JERSEY. LOCOHOTIVE-BOILEE SUPEBHEATEB.

Specicatlon o! Letten Patent.

Patented May 14, 1918.

Application led June 12, 191?. Serial No. 174,174.

'To all 'whom it may concern:

Be it known that I, HARRYl S. VINUENT, of Ridgewood, in the county of Ber en and State of New Jersey, have invente a certain new and useful Improvement in Locomotive-Boiler Superheaters, of which improvement the following is a specification.

y invention relates, generally, to superheaters of the lire tube type for locomotive boilers, and, particularly, to those of the design of that ty e, in which the throttle valve is interposed) between the superheated steam compartment of the superheater and the cylinders of the locomotive, an early instance of which is exemplified in Letters Patent of France No 9.7012, granted to la Compagnie du Nord, under date of December 4, 1860.

yThe object bfmy invention is -to provide means 4for conveying superheated steam from a locomotive boiler superheater to the engine cylinders, and controlling the supply, between the` superheater and the c ylinders, which shall be of sim 1e and mexpensive construction` and he oeated, except `for a limited poi-tion of their extent, cn-

tirelv exterior to the boiler; and which shall, further, be applicable in connection with superheaters of the resent standard type, without substantial c ange in the com struction thereof.

The im rovement claimed is hereinafter fully set orth: l,

In the accompanying drawings: Figure 1 is a side view, in elevation, of the forward vportion of a ,locomotive engine, illustrating an application of my invention; Fig. 2, a front view, in elevation, of the same; Fig. 3, il. view, taken similarly to Fig. 1, illustrating a structural modification; Fi 4, a view, taken similarly to Fig. 2, an artly in section, of the structural modi cation shown-in Fig. 3; Fig. 5, a partial vertical longitudinal sectiononan cnlarged scale, on the line a: of Fig. 6, and; Fig. 6, a vertical transverse section. on the line y 1/ of Fi 5.

y invention is herein exemplified, as applied in a locomotive boiler, 4, which is of the usual construction, and is provided, at its forward end with a. smoke box, 4, which is supported on the ordinary cylinder saddles, 12. A plurality of fire tubes, some of which, 6?, are of larger diameter than the others, extends from a firebox at the rear end of the boiler, which is not shown, to the front flue sheet, 4", and the products of combustion pass 'through the tubes, in the usual manner to the smoke box, 4, from which they are discharged into the atmos here through the stack, 4*'.

In t e practice of my invention, referring descriptively to the specific embodiment thereof in connection with a superlieater of the standard Schmidt type A construction which is herein illustrated, the superheater header, 70, is. as usual, located a. short distance forward of the front line sheet, 4, and comprises a rear transversely extending saturated steam compartment, 70", which is connected by a short receivingV nozzle, or dry pipe, transversely compartment, 70.

61, and an adjoining forward extending superheated steam Saturated steam entering the compartment, 70", from the dry pipe, passes from said compartment through a plurality of return bend pipes,

own as units, which are located in the tubes, 6.7, in which it is superheated by the products of combustion passing through said tubes, and is delivered therefrom to the superheatcd steam compartment, 70', from which it passes, through two branch steam pipes, 63, to the engine cylinders.

In ordinary practice, control of the admission of steam from the boiler 4to the saturated steam compartment, is effected by a throttle valve located within the boiler, at the rear dnd of the dry pipe, and governing the admission of steam `from the boiler, through said pipe, to the saturated steam .-com atment, and the branch steam pipes are is osed inside of the smoke box, each being connected to one of two nozzles at the ends of the superheated steam compartment. In the application of in invention. the superheater header is mo ified by eliminating the two end branch steam pipe nozzles above stated. and substituting therefor a single central delivery nozzle, which is connected to the casing of a throttle valve located on the outside of the boiler, and controlling the branch steam pipes, instead of the dry pipe, the branch steam pipes, i'i this case, leading. entirel outside of the boiler, to the engine cylin ers. Under this construction, which will now be more fully described, it will be seen that the steam space of the boiler is, atall times. in Ao en comiiunioation with the superheater lies. er,

62, with the main steam piper and, then ore, that the header and superheater units are continuously filled with steam, during the periods that the locomotive is under steam, irrespective ot whether the throttle valve be open or closed.

The delivery nozzle, of the saturated steam compartment of the head1-r, is connected, by an angle pipe, 5, passing through the top of the smoke box, 4, with a for wardly extending nozzle, G, formed on a throttle box or chest 0, which is supported on the outside of, and secured detachably to, the shell of the boiler, 4, immediately in rear o the smoke box, ball joint rings, (3, being fitted between the pipe, 5, and-the nozzles, T0 and 6, to insure tight joints. The pipe 5, and throttle box, (i, are preferably, as shown, inclosed in a light sheet metal case, 6*', and the pipe, 5, being supported by the throttle box, and this, in turn, by the boiler, no additional weight is imposed on the superheatcr header. The branch steam pipes, (i3, are connected to opposite sides of t e 'throttle box, 6, and lead therefrom, on the outside of the smoke box, and adjacent thereto, to connections with the distribution valve chests, 12", of the locomotive, following, as nearly as may be, the curvature of the smoke box, to a level slightly below of the boiler. A Communication between the interior of the throttle box and the branch steam pipes, 63, is e'ntrolled by a throttle valve, '1, which maybe of any. suitable and preerre constructionp'andwhich dors not, in an of itself, form part-of inv present invention. lo the instance s own, it is balanced top lift puppet tral le, and is secured to a balancing piston 7a. litting a chamber :u the bottom of the throttle box, to which n am is sdofilted, in the usual manner, in lhfnnscatingo the valve, by a small pilot volw. T. The throltle box, 6, is closed at top by a removable ea or head, 6, in uhhh an oper in l sha t, d, is journal said ASnail, pass-'mg t rou h astuii'mg box, 8

the center line on ono side ofthe thrott e box, and carrying i an in de arm,"3b, which is coupled to the th rattle valve, and an outside arm, 8, which ic coupled, by agl ink, 8", to one arm of abell croi-l; lever, 8,journale on the boiler the other arm of said lever being coupled by a throttle rod, 8l, to a throttle lever' shown)` in the cab of the locomotive. will, however, be understood that the specific construction and operating mechanism o the throttle valve', are not essentials of my invention, an that other designs, of whicv many are known in the art, may be substituted. in the discretion of the constructor.

A circulating pipe, 9, of small diameterjs connected to a nozzle on the. rear side of the throttle box, opening into the space above the throttle valve, and leads therefrom either to a connection with the steam space, or preferof the single seat4 (not It' secure by ably to an automatic drifting mechanism, in locomotives on which the latter is applied. By the flow of steam from the satura steam compartment, through said pipe, a moderate circulation of steam through the superheater units will be effected when the throttle valve is closed.

Figs. 3 and 4 illustrate a structural modification which accords in all fessential particulars with the construction above described, is further designed to minimize the obstruction to the view of the engineer oo easioned by the outside location.` of thev branch steam pipes, To this end, said pipes, instead of being orwardly and downy inclined from the throttle box, as in the instance irst described, are first curricd forward horizontally therefrom, and are then extended downwardly, projecting into inclined lateral openings, 4, in t e smoke box, which are preferably located in, or nearly in, line with the transverse central plane. of the stack. Said openings are closed, on the inner sides of the branch steam pipes, by cover plates, if, which are secured detachably to the smoke box, to admit of the insertion and removal of boiler tubes adjoining the sides of the boiler.

n addition to the advantages, common to all superheater designs in which the throttle valve is located between the saturated steam cbmpartment and the engine cylinders, 1I. c., of reducing the liability to destruction of the units through heatapplied thereto, by maintainin them constantly filled with steam; the elimination of dampers and their open ating mechanism; and the capacity' o quicker starting and stopping of the locomotive, m invention reduces obtains in ports `the throttle box, throttle valve, an connecting pipe, inde endently of the superheater header, there y preventing the ob jeetionable imposition of weight thereon, and locates the throttle valve in position where it 1s readily accessible and is not subjected to the injurious action of a high degree of `d necessitatesyfor its application,

, ht inexpensive change in the construction. Vg'rsent standard superheater header. HI c1am,as myyrinvention and desire to Dllrs P; tent: l. The combinan n, with. a locomotive boiler, .of a superbes@ `header located in the V smoke "box, and having a single ydelivery nozzle entire! ine psedtherein; a ,throttle box support ,ind pendently of the superheater header, on t e exterior of` the'boiler shell; an angle pipe secured to, and suppr through the smoke box .and being connected, at its lower end, to the deliveryl nozzle o the superheater Vheader branch steam pipes by, the throttle box. said pipe passing u n ndfsupported by, the

lading, exterior to the, boiler from the throttle box to connections with the distribu- 'ion vulve' chests of the engine; and a throtalf: valve seating in the throttle box and control-ling communication therefrom to the branch steam ipes.

2. The com ination, withV n locomotive boiler of a superheater header located in the smoke box, and having u .single delivery nozzle entirel" inclosed therein; a throttle box supported, independently of the superheater header, on the exterior of the boiler shell, and haring a forwardly extending delivery nozzle; an. angle pipe secured to, delivery nozzle, said pipe passing through the smoke box, and be` ing connected, at its lower end, to the delivery nozzle of the snperheater header; lfnll joint rings interposed between the single pipe andthe throttle box and superheaiter header; brunch steam pipes leading, exterior to the boiler` from the throttle box to com nee-tionsv 'with the distribution valve chests of the engine; Aand a throttle valve seating in the throttle boxnnd contqgilling eom- 25 munication therefrom to the branch steam pipes.

3. The Combination, with a locomotive boi-ler, of a smoke box hnvinr inclined lat-- eral openings; a superheater eader located 3o in the smoke box; n throttle box sup orted independentlyl of the superheuter hen er, on the exterior of the boiler shell; e pipe passing through the smoke box and connecting the superheuted Steam compartment of the 35 header with the throttle box; branch steam pipes leading from the throttle box to eonnections with the distribution valve chestsl of the engine und extending longitudinally in lthe lateral openings of the smoke box; 40 and cover plates fitted over Said openings und .secured detuehably to the smoke box` HARRY S. VINCENT. Witnesses:

J. M. MAYNARD, F. A. WADSWORTH.

Images