US1775961A - Throttle valve - Google Patents

Description

Sept. 16, 1930. w. F. KIESEL, JR 1,775,961

THROTTLE VALVE Filed Jan. 18, 1928 2 Sheets-Sheet 1 aza 91M attozmqg Patented Sept. 16, 1930 ATES' FFEE WILLIAIVI F. KIESEL, J33, ALTOOITA, PENNSYLVANIA THROTTLE VALVE Application filed January 18, 1928. Serial No. 247,714.

This invention relates to throttle valves and more particularly to throttle valves adapted for use on steam locomotives and similar devices.

The various features of novelty and objects of the present invention may be enumerated as follows:

A. The provision of a throttle valve housing which forms the sole closure for one end of a steam drum which may be on the exterior of the boiler barrel.

B. The arrangement of the throttle valve on the exterior ofthe boiler barrel, the superheater on the interior of the smoke-box and the provision of a conduit or dry pipe passing through the wall of the smoke-box and connecting the two parts.

C. The arrangement of the throttle valve entirely outside of the boiler.

D. The provision of a casing within the valve housing having connection with the outlet conduits and of means to provide balancing steam to the bottom of said casing from near the top of said housing.

E. The manner of operating the valve without resorting to packing or sliding operating rods.

In more or less conventional locomotives it has been customary to locate the throttle valve Within the boiler barrel, in a suitable steam dome, and to lead the dry pipe from the valve to the cylinders through the front flue sheet and thus into the smoke-box. The present invention obviates a number of the well-known difuculties experienced with that form of construction. It is particularly suitable for use with that type of locomotive boiler disclosed in my co-pending application Serial No.202,521, filed June 30, 1927.

The invention may be understood best after a consideration of the accompanying drawings and following specification, wherein is disclosed a single exemplary embodiment thereof, with the understanding, however, that such changes may be made therein as fall within the scope of the appended claims, without departing from the spirit of the invention.

' In said drawings:

Figure l is a side elevation of a locomotive having a throttle valve constructed accord ing to the present invention applied thereto, certain parts being omitted for the sake of simplicity Figure 2 is a longitudinal vertical section through the throttle valve housing;

igure 3 is a transverse section through the valve housing taken on line 33 of Fig. 2; and

Figure 4 is a partial horizontal sect-ion taken on line -l-& of Fig. 2.

Referring particularly to Fig. 1, the locomotive will be seen to include the boiler barrel 10, extending from the fire-box 11 to the smoke-box 12, which is just forward of the front flue sheet 13. Lying above and substantially parallel to the boiler barrel is the outside steam drum 14 in the form of a cylinder of small diameter having communication with the interior of the boiler barrel by means of the fitting 15. The rear end of the steam drum extends over the fire-box and is closed by a suitable fitting 16. The front end extends up to near the front flue sheet and is cut off substantially square as at 17. This steam drum takes the place of the customary steam dome and insures dry steam for the power cylinders.

lVithin the smoke-box are a pair of superheaters 18, one for each cylinder 19 of the locomotive and connected to the steam chest thereof as at 20. The supcrheaters, of which but one is visible, are connected together by the cross-balance header 21.

The inlet header 22 of each snperheater OX- tends upwardly and through a suitable aperture in the wall of the smoke-hex and is provided with a coupling flange 23 on the end thereof. The means for sealing the opening through the smoke-box wall, while yet allowing relative movement of the header 22 due to expansion and contraction resulting from temperature changes, is disclosed in my co-pending application $erial No. 205,019, filed July 11, 1927.

Steam from the drum 14: is introduced into the headers 22 through the conduit sections 241- which are connected to the drum through the agency of the throttle valve housing Referring now to Figs. 2, 3 and l, it w ll be seen that the housing is preferably a one-piece casting having the neck or sleeve 26 adapted to fit tightly Within the end of: the drum 14 and .be' secured therein by suit able fastening means such as the rivets shown. It thus forms the sole closingmeans ifor the' torward end otthestearn drum.

the interior ofwhich is connectedto t-he'conduit sections 24 by the laterally disposed integral conduits 30 which pass through the Walls of the housing as shownin Fig S, The flow ofsteain lntotne cas1ng,- and hence -to the superheaters, is controlled bythevalve 31 seating 111 the open upper "end of there-asing 28. The ClSlllg and the valve areconstructed'"according to the disclosure in'rny.

-Patent No; '1,275,041,"Throttle valve, issued August 6311918., and need not be further described here except to state that "the valve is of the balanced typeto reduce the'ainount of'efhirt necessary to inove thesaine, Steam to 'efieet the balancing 1s admitted to thegun 'derside'of the piston 32 directlyconnected tothevalve 3 1, and i stamens d by the" secondry as possible torlthis purpo'seis taken r froinfnearfthe top 'of'the' valve housing by dfary valve'SB onthe niain valve stem 84.

Steam for balancing" purposes should he as ineenfs of the. conduit 35: cast; integral With reaches to "the'levelofthe nain valve;

. Inf ordertojoperate the valve stein; which; s gu ded for vertical movement, '3 bell crank; ism-sorted to, one arm-310i h chf s Within the housing and the other arrrifidoiiwhieli is outside ofthehousing; The inner. flllln" is bifurleatedasht 39'to stinddle the valve stern 34 and has each 'arm longitudinally slotted to engagej w th the cross-p1ns-4O on theggco'l lar 41 secured tojtheupiier end of the valve stein-"f it I The}; inner; arm of the bell "crank iscon nefiied totheioutei arm by'nieans of thetore sionshaft' 42 wh ch 15 arrangedin theoil'set chamber-T43 in the Ffrontw'all of thefvalve housing". This shat-thee its hearings in the 'thiinble 44 pressedin the bessj 45 and 'in'the bushing .46 epessing e ough the Wall 47 of I the housi'n' and b olted-thereto 'b "means of {the flange 48. The shaft is ma de-steani-tight where i't'passes through the bushing byineans of theplano-jconvex Washer 49. Steainypres sure on theflange 50' on theshaft pres'seslthis flange fzigainst the Washer, and the asher 7 agein'stla' seat at'the'innerend of the bushing- 46f PoWen to operate'the valve is applied through the pulli'rod 51 pivoted to thelower I' sfjof extreme nnportanc e" that provision I housing is attached to the boiler by the large 1 port is illustratedin Figures 2 and-3 ivhere 7 relative" movement ban take place between theparts, thus insuring that thereiwlll-be no strains on the druin' or the throttle valve is claimed asnew "nd" 7 outside of said "boiler, and; indirectly -.*eo'ncation with" means on "said ClOSll 'barrel, agsteain druin surmoentinjg said bar housing forfsa'id valvel"closi'ng the nd'ot in: loeoniotive construetion for j ex-l' pansion andcontrztct o oi the parts subject 5 to"temperature changes. The locomotive'illustrated in Figure 1 is intended'forjuse with steampressures as high as 450 pounds to-the J square inch, and it will be seen that the temperature range is thus very great. The drum 14 which takes the placeof the eus j tolnary steam donie and supplies-jsubstantial: 1y dry saturated steam to the throttle valve fitting 15' near the r'earfend-o f the boiler bar,- i rel and near the center of the drum." The vvhole ii'orwardend of the drum 14 is unat tached to the'boilerbarrel;andit is arrangedito havethis end' aswell as the throttlevalve housing supportedonly by a-sl d-ingsupport 9" which restson the boil-erbarrel, ljTlllS SjLlP thecastin'g 25'i'or1ning' thehiousing for-the f throttle valve has arranged-thereon the in-i tegragl feet 52Which extenjd be'lovv the'bottoni of the casting and areadaht'ed 'tdrestdn the boiler barrel to carry the load of thethrIOtt-le f, I valve and of the {forwardv end offthe drum Theymerely' rest on the boiler barrelsotha't housing other thanthose imposednorinalr steam pressures. Q If 1 1 Froin the ebovedescript'ion 1b will be seen; "e5 that the various teatiires-an'd.-obj'ects of the; V invention are efiec'ti'vely embodied in *the' a y I I v a t novel construction and arrangement. and alongtheouts de.Of'theeasmg-QS it Having thus "described the invention, hat A i desired *b'e ecured by LettersfPatent-Jis' V t t v 1. in-eioctmonve havingebe r ,a'sin lie box and'a sup'erheeteriwithinsaid sinokeeh the cornbinationxot thriOtt-le valv'eefntirel nected thereto to. control the flew otsteein j therefrom,and a 'con'duit connectlng the exit erberrel; a, steanr drumjoutside o f;"substan 9 jtieQllypara-Ilel to and; in oomniunic etion-With- I I 'saidcbarrehe closure "for andthitside oft-hes I tomva-rdendf of said drum; prising a housing for the rel, a throttl eivelveilat oneendol?saiddrurn, 7

said dru n' said housing'ha ingftivo oppositely disposed steam outlet 5 Iii-a lo-coinet ve i-ncenih n tion; a boiler barrel, a smoke-box, a steam drum surmounting said barrel, a throttle valve at one end of said drum, a housing for said Valve clos in the end of said drum, said housing having two oppositely disposed steam outlets, and a conduit secured to each outlet and pass-' ing into said smoke-box.

6. In a locomotive, in combination, a boiler having an external steam drum, a throttle valve housing closing one end of said drum, a valve in said housing, balance means below said valve adapted toreceive steam from beneath and means in said housing to supply balance steam thereto from near the top of said housing.

7. In a locomotive, in combination, a boiler barrel, a smoke-box at the front end thereof, a superheater in said smoke-box, a steam drum outside of said barrel but in communication therewith, a throttle valve on the end of'said steam drum and close to the junction of said barrel and smokebox, and a conduit from said valve to said superheater, passing through the wallof said smoke-box. 8. In a locomotive, in combination, a boiler barrel, a smoke-box at the front end thereof, a cylinder adjacent said smoke-box, a horizontal steam drum outside of and substantially parallel to said boiler barrel, a throttle valve housing closing the forward end of said drum, and a conduit from said housing to said cylinder, said conduit passing through said smokebox.

9. A housing for a locomotive throttle valve, comprising a unitary casting including a sleeve adapted to be secured to a steam drum, a hollowing body portion coextensive with said sleeve, a leg to support said housing and drum from the locomotive boiler, a steam conduit extending from said hollow body portion, and integral means to cooperate with the valve proper and the said conduit.

10. In a locomotive, in combination, a boiler, a saturated steam drum extending longitudinally over said boiler, a throttle valve having a housing including a body portion, a sleeve extending from said body portion and attached to said drum, conduits extending laterally from said housing,'and a valve member in said housing to control the flow of steam from said drum to said conduits.

In testimony whereof I hereunto ailix my signature. 7

WILLIAM F. KIESEL, JR.

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