US1074792A - Steam-superheater. - Google Patents

Description

SQHOOPER d@ R. o. STEVENS.

STEAM SUPERHBATER.

APPLICATION FILED MY11,1912.

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C. S. HOOPER & R. C. STEVENS.

STEAM SUPBRHEATER.

APPLICATION FILED MAY 11, 1912.

1,674,792', v Patented 061.11913.

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STEAM SUPERHEATER.

APPLIGATION FILED MAY 11, 1912.

Patented Oct. '7, 1913.

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Specicationof Lettersatent. Application ledfllay 11, 1912. Sera1-No.696,574.

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.has fori its object,the overcoming' of certain defects in .the .construction and operation thereofl hereinafter set forth and explained. v lnsuper-heaters as ordinarily constructed, it 'is- 2a well known =fact that' thenetea'm'A delivered therefrom continually luctuates from low fto high, and vice iversa, which fluctuations, supposing the -fapplioation fof heat utothe ysuper-heater @to be constant `tin degree, is caused'by anincreaseor decrease inithespeedof travel .of the steam through ,Then ain,

the supereheatenfowing toi-changes of `load yapen the power generator; a 'heavy load consuming, more steam than v'a .light '-l'oad.

the fluctuations in' the temperathe steam as delivered Ifrom 'the be caused by 'faulty stok- 'Ihe evil results of this fluctuation, manifest;I themselves inthe operation yofi the power generator, .and also by causing conf tinued alternate expansion and contraction in pipe-fittings'and generator vparte which vrenders 'them short lived, and causes them to Another,v

soon become leaky'and wasteful. evil in the result of 'excessively temperature of steam,is the dis-'assoclationof the -oxygen 'and hydrogen 1'which'causes rapid oxidizationI-of the super-heater tubes, and the destruction ofk lubricating Aagents and packings in thegenerator.

.ltlis therefore-the object of our invention to overcome these evils in the super-heating of-steam, by constructing asuper-heating apparatus in such 'amanner that thesteam can be delivered therefrom at a uniform-temperature; and we accomplish this objectby automatically or manually advancing or receding the exposed surface of 'the superheater` into or from thepath of tlre'lreat gen'erated'in the furnace of-thelboilercr ysujoeri-tuffater.thus increasing or diminishing have intheintensity of heattothe exteriorofthe 1 super-heating apparatus, Whilei atgthe 'same itiene increasing or diminishing vthe area of the surface of the fsuperlheating 'apparatus exposed to fthe faction :of :the heat. -ffhese andother features'of ourinvention will appear hereinafter in :the '-specication fand l claims and are illustrated in! the accompanying .drawings in which,-

Figure- 1; is aL diagrammatic viewshowing "anl arrangement of mechanism :for carrying out the objectsof our invention. Fig. :2, iS i a sidev'iew of. asuper-.heater embodying'our invention Apai'tlyin elevation .and partly in z section on the line ---ml infF 3. Fig. 3, is

an'end view of the same, onrtherline-y-y inFig. l2. Fig.4, is :a sideviewfxoff the same, partly in elevation andrpartly. in section, of a-modified constructionthereof. Fig. 45, is

an enldiviewi ofthe sarna-partially in elevay tionaamd .parti-ally.4 infsection.

In A:these'ldraiwings A, indicates `a .steam boiler, "B, indicates the `lire-chamber thereunder, B', indicates the floor line, C, indicates the `fire-wall, and D, indicates the wall at the'backflof-the boiler, inciosing the chamber .D', lwhich receives -and conduct-s the productsof combustion .from the furnacechamber CB, into -lthe boiler tubes a; these' parts .bei-ng ofusual. andV ordinary construction. f

=ln carrying out-cur invention, where the spaceatE the rear `ofrthe boiler A, is limited, we excavaterapit D2, under the chamber D', of suticientfdimensions, and' in this pit we place preferably, ya hydraulic jack E; -the fluid supply pipeE', of which leads to threeway-valve E2.

In Figrl we have shown a form of automatic=mechanism adaptedtocontrol the operation lof the valve E2, viz #the adjustable electricth'ermostat 1, which is in 'communication with the- Super-heated steam in the steam 'discharge pipe V'fl-l2, by means of the branches h, and h', :alclock-mechanism 2, adaptedto be electrically controlled by said thermostat, which. clock, through the crankarm 3, and link 4, is adapt-ed to operate the arm e, of the valve E2. Connected to one side of the valve E2, is afluid supply pipe c', which fis-connected with a suitable supply ofpressure fluid (not shown). e2, indicates the Iexhaust from the valve E2, and 5, indicates the electric .generator in circuit with the 'thermostat l, and clock-mechanism 2.

The adjustable lthermostat 1, 'and clock? ,In order to 1p 4boiler to the sup mechanism 2, are of ordinary construction, and the mechanism thereof 1s not shown as they form no art of this invention. Supsupply pipe G,.is secured, which leads there` from upward through the roof of the chamber D', and to the upper end of this supply pipe G, a fiexible pipe G', of ordinary construction is secured, leading therefrom to the steam boiler A, .in the usual manner. To the opposite end of the drum F, a discharo'e pipe H, is secured and leads upwardIy therefrom through the roof of the chamber D, where a flexible tube is secured thereto and leads therefrom to any desired point. rotect the jack E, from cinders and soot, w ich may fall down into the pit D2, we secure a cylinder J, to the upper end of the ram E", of the jack E, the upper end of said cylinder being closed and the lower end open, so that said cylinder extends down and completely covers the jack E, when the super-heater 1s in its lowermost pos1tion, as is shown by full `lines in the drawings, and when the super-heater is raised to lts highest position as shown by broken lines in v Fig. V1, said cylinder J, entirely embraces and protects the plunger of the ram E2, from soot and dirt.v

In Figs. 4 and 5, we show another means of carrying kout the Vobjects of our invention,

which may be employed where there is more room at the rear ends of the boilers. In these figures F2,.indicate`s the drum offa super-heater and F2, the tubes thereof. G2, indicates the steam pipe leading from the er-heater, and H2, indicates the pipe leading from the super-heater. The super-heater drum F2, is supported upon supports K, laced upon the bottom of the chamber D', which have journaled in the upper ends thereof rollers lc, upon which the drum F2, of the super-heater'may revolve.

On one of the pipes Gr2,'or H2, or on both, may be placed an arm L, on which there 1s a counter weightL, of sullicient gravity to counter balance the super-heater tubes F2.

It will be noticed that in the construction shown in Figs. 4 and 5, while it is not necessary to digapit in the bottom of the chamber D', that it is necessary to make said chamber wide enough to lermit the oscillation therein of the tubes 1?".

our invention as associated with a tubular boiler, those skilled in the art will readily understand that it could with equal facility be operated in connection with a water tube boiler or other form of boiler; also that it could be advantageousl utilized as an independently fired supereater, and that the -su er-heater drum F,

. claim as new and v operation ofsa'id first While we have described and illustrated out of the path of the objects of our invention may be completely carried out whether the movement of the super-heater into and out of exposure to the action of the heat be linear or rotative, and wlllather controlled manually or automatica y.

In operation when the steam passing through the `super-heating ap aratus possesses the required number ci) heat without ex osing the tubes F', thereof to the action of) heat, the crank-arm 3, of the clock 2, will be in an upright position as'shown by full lines in Fig. 1.

number of degrees of heat the crank-arm 3, Will be moved downward, which will operate the lever of the valve E2, as shown in broken lines in Fig. 1, to admit pressure Huid from the pi e e', into the pipe E and jack E, which w1 l cause the jack to lift the upwardly until `the But when vthe thermostat is adjusted for the higher degrees of tu es F, are exposed to a sullicient degree of heat to raise the steam therein to the required unmber of degrees of super-heat, and

as the super-heated steam kin the pipe H2,

raises or lowers above or below the number of degrees that the thermostat l, is adjusted to mamtain, the valve E2, will automatically be operated to` raise or lower the superheater F. j f' o While we have shown and described an automatic mechanism for controlling the operation of the valve E2, `it will be understood that Vthe same may be manually controlled.

While we have shown' electrically controlled clock mechanism for controlling the operation of the valve E2., it will beobvious to those skilled in the art, that electro-magf netic mechanism controlled by a suitable thermostat, may with equal facility be substituted for the clock mechanism.

Having thus .shown and described our invention so as to' enable others to construct l and use same, we do not desire to be limited to'the exact construction and arrangementl ofI mechanism herem shown vand descrlbed for carrying out the same, but what we Patent, is

1. The combination in a su er-heater, of walls forming a heating cham er, a superheating apparatus in said chamber, mechanism adapted to be operated apparatus into andput of the path of the heating gases in said chamber, and thermo-- -pressure ]ack adapted to beoperated to move said super-heatin apparatus into and eat-mg gases in said desire to secure by Letters p to move said' chamber, a fluid supply pipe, Valve mechanism in said pipe adapted to control the admission and escape of yfiuid from said pressure jack, automatic mechanism adapted t0 operate said valve, and thermo-electric mechanism adapted to control the operation of said automatic mechanism, substantially 'as and for the purpose set forth.

3. The combination in a super-heater, of Walls forming a heating chamber, a superheating apparatus in said chamber, a uid pressure, jack adapted to cause said apparatus to move into or out of the path of the heating-gases in said chamber, a fluid supply pipe adapted to supply iuid to said ack, a valve adapted to control the admission and mechanism adapted to be controlled by `the 20 thermal condition of the super-heated steam Vfor controlling the operation of said electrically controlled mechanism, substantially as and for the purpose set forth.

In testimony whereof We allix our signa- 25 tures, in presence of two witnesses.

CHARLES S. HGOPER. ROBERT G, STEVENS.

Witnesses:

H. M. STURGEON, E. E. MYERS.

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