US1179627A - Steam-generator. - Google Patents

Description

W. T. HARRIS.

STEAM GENERATOR. APPLICATION FILED JULY 21, 1911. 11,179,627. Patented Apr. 18, 1916.

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APPLICATION FILED JULY 21,1911.

Patented Apr. 18,

3 SHEETS-SHEET 2- vvi/tweooeo WILLIAM r. HARRIS, or s'rauurou,

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To all-whom it may concern:

Be it known that 1, WILLIAM T. HARRIS, a citizen of the United States, residing at Staunton, in the county of Augusta and State of Virginia, have invented certain new and useful Improvements in Steam-Gener ators, of which the following is a specification.

My said invention consists in various improvements in the construction of steam boilers especially designed for use on locomotives, whereby substantially perfect combustion is secured and a'comparatively high degree of steam pressure thereby generated by a minimum supply of fuel and "arious other important advantages secured, all as 'will be hereinafter more fully described and claimed.

' Referring to the accompanying drawings which are made a part hereof and on which similar reference characters indicate similar parts, Figure 1 is a longitudinal section through a steam generator of my improved construction applied to a locomotive, Fig. 2 a, horizontal section through the same .on the dotted line 2-2 in Fig. 1, Fig. 3 a longitudinal vertical section on the dotted line in Fig. 2, Fig. 4 a cross section on the dotted line 4-4 in Fig. 1, Fig. 5 a cross section on the dotted line 55 in Fig. 1, and Fig. 6 a. cross section on the dotted line 6-6 in Fig. 1.

said drawings the portions marked A represent the. outer shell of the generator or boiler, B thecombustion chamber and C aninner shell or flue structure leading from the combustion chamber to the smoke-box. The boiler A may be a locomotive boiler, such as showmprovided with a steam dome a, smoke-box AL" and smoke-stack a, and other ordinary features of 'construction, or it may be a boiler of any other form. The combustionchamher B is 'also in the main of.any approved form provided with grate bars 6, a 'fuel supply door 7) and other common features of construction. It is mounted in the rear end of the boiler and supported by means of suitable braces and supporting; parts. Theflue C comprises a hollow shell preferably rectangular. in form with hell-shaped circular ends 0 aud o provided with flanges .lilllch we r w ia 11 s nd a g Specification of Letters Patent.

A, connected.

6 in the front end of the combustion charm her, and a? in the front end of the boiler, respectively. By constructing the ends a and 0 outwardly flaring, the'gases leaving the main combustion chamber are directed into the flue of the inner casing, and at the forward end of this flue (i. e. at the end 0') the gases are freely liberated for entrance into the smoke box. This arrangement avoids the baflling elfect that would be pro= duced if the ends of the inner, flue were square. It will be noted that by reason of this construction the removal of the rivets connecting said flue with said flanges b and a will permit the removal of the entire flue structure C, and all parts thereby, through the front end of the boiler, or, by

the cutting of the rivets connecting the Patented Apr. is, rare.

Application filed July 21, 1911. Serial No. 689,851.

front end of flue C with the flange a and the bolts securing the rear end A of boiler A in position, said flue and combustion chamber may be moved as a body from said boiler. Said flue C is provided with numerous vertical tubes 10 which extend through its top and bottom in transverse rows near each other from oneend of said flue to the other, the tubes in the adjacent rows being set staggered in relation to each other. By this means free water circulation is established through said tubes 10 from the lower tothe upper part of boiler Aand the passage through flue C is obstructed by the vertical tubes so that the heat and other products a serpentine ,course, wrapping around the various vertical tubes in their passage through said flue. 'The front end of fine C is filled with a series of coils 11. extending vertically and corresponding in arrangement to the tubes 10 but connected in series bysuitable couplings both above and below the flue to form a continuous passage through saidcoils. An inlet pipe 12 is connected with one end of said coils and an outlet pipe 13 with the opposite end. Said inlet pipe 12 is connected by a branch feed pipe 14 with the water tank on the locomotive through which the water is fed from said tank and passes through said coils 11, where it is heated and from which it is discharged through pipe 13 and nozzle 15 into boiler A. A check valve 16 is mounted beof combustion are required to take 1 the outside of the boiler which may be removed When required to establish communi-' cation with the coil for cleaning purposes. Said flue C is preferably braced with a series of flanged irons riveted to its sides to afford the required resistance to the exterior pressure. v

Within the combustion chamber B I also provide an auxiliary steam generator 20 comprising a shell which forms a partition extending transversely of said combustion chamber a distance above the grate bars and preferably inclined from the rear of said combustion chamber downwardly toward its 'front end. Said shell is provided with vertical tubes 21 through which the products of combustion may pass from be-. low to above said shell. A water inlet pipe 22 extends from the lower part of boiler A to the front. end of said auxiliary boiler 20 and an'outlet pipe 23 extends from the rear end of said. auxiliary boiler through the end of boiler A, then to a oint near the top of said boiler, Where it ischarges through a nozzle 24, thus establishing a complete circulation'through said auxiliary boiler from v the lower side of boiler A to its top.

' Air supply funnels 25 and26 are mounted on the sides ofv the cab with funnel shaped forward ends'and their rear ends turned and inserted through suitably formed open ings in the rear end of boiler A, thus being arranged to discharge in'imediately above the rear end of auxiliary boiler 20 in the combustion chamber.

The smoke-stack. a is formed with an inner tube 30 of smaller'diameter thus providing an annular space between them. Said annular space terminates in channels 31 and 32 which extend down aroundthe front end of boiler A where they are joined by an L 33 and connected to a rearwardly extending funnel 34 which extends to a point rear- Wardly beneath the locomotive, for a purpose to be presently described.

In the top of smoke-stack-a is pivoted a valve 35 which is adapted to be operated -from the cab by a handle 36 on an operating rod 37 connected by suitable links and levers with the pivot of said valve.

The operation of my said invention is as follows: The products of combustion passing through the vertical flues 21 of the auxiliary generator 20 commingle with the air, coming through funnels 25 and 26, in the combustion chamber above said auxiliary generator and burn freely, filling said combustion chamber with flame of intense heat, which passes through the flue C, being to the smoke-box and up through the smoke stack strike a deflector -10 located over the inner tube 30 of said smoke-stack and are deflected downwardly through the annular space between said tube 30 and smoke-stack.

a into the passages 31 and 32 and are discharged out through the funnel 34. In passing through tunnels, stations and other places where it is desired to confine the gases and smoke as much as possible, the valve 35 may be closed when all of theproducts' of combustion which ordinarily pass throu h thesmoke-stack'will be required to take t e as towthe heat in the boiler A surrounding flue structure C and its circulation tubes 10. By this means not. only is the heating capacity of the structure fully utilized but substantially perfect combustion is secured and all of the heat of the fuel also utilized and thus the greatest degree of steam pressure is generated by the use of the smallest.

possible amount of fuel.

In addition to the advantages above pointed out a generator is provided which is comparatively easy to clean and to repair. The flue structure C can be easily and quickly removed as a whole for the pur pose of putting in new tubes or stopping leaks. Said flue structure being a considerable distance above the bottom of the boiler is out of th( wayof the ordinary accumulation of m1? 1, which settles on the bottom of said boiler and may be removed, through an aperture left for the purpose and covered by aplate a Having thus fully described my said invention, what I claim as new and desire to secure by Letters Patent, is: v i

1. A steam generator comprising an outer shell, an inner shell providing a flue, a .plurality of water tubes passing through said flue and secured thereto, and certain of said tubes connected in series and communicatin with the water supply providing a feed waterheater, substantially as set forth.

7 2. A steam generator comprising an outer shell, an inner shell disposed horizontally in the outer shell and providing a combustion chamber and a flue, a plurality "of open ended water tubes passing transversely through said flue for a portion of its length,

and a series of connected water tubes passing transversely through the flue and communiceting with the source of water supply and the interior of said outer shell, substantially as set forth,

In witness whereof, I have hereunto set my hand and; seal at Washington, Dis- WILLIAM '1. HARRIS 1,. 8.

Witnesses:

E. W. BRADFORD, J. D. YOAKLEY.

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