US1647465A - Steam valve - Google Patents

Description

Nov. l, 1927 P. PASCALE STEAM VALVE Filed Ngyf. 12, 1925 v 2 Sheets-Sheet 2 reame agee.. a, tear.

miren srnTEfS? aantast parte PASQUALE Pasolini,V or NEW Yoan, N. Y., yAsszcelaon 'ro DBI-smaniaivsnvn coal ronarrolv, E 'consonancia or DELAWARE.

Asmania verve;

. Application aies november 1a, 192s. serial no. 68,718.

This invention relatesto a steamv valve, of

. the kind especially adapted for use on loco'- The primary object is to thoroughly motives, but it is not limitedto such use.

It Yis important under existing conditions governing the building of locomotives that various economies be practiced, and'that the capacity and 'eii'iciency of the engine be increased without increasing Vmaterially the heightof the locomotive, thesteam dome and the size of the boiler space. These have already been reduced in present .locomotive that diihculties building to such 'an extent are being encountered-with the proper life and maintenance of superheater equipment, because too .much water. is drawn over through the throttle into the superheater whichresults in decreasing the efficiency of the superheater with a resultant increasing cost of maintenance.

The present invention contemplates the provision of ,a valve in which there is combined, a balanced stop valve and means for drying valve, which latter element comprises a device which may be termed a-steam dryer. The objects of the invention are several.

steam as it passes through the valve, and to superheat the steam by breaking 1t up into attenuated streams or divisions, and -deliv ering it to its work free of moisture, and at a temperature substantially thatv of the temvperaturein the boiler.

' Another object of the invention is. to'separate the water in the boiler .as far as possible or feasible from the point at which the steam passes into the valve, or' in other words,

break the contact between the steam and water so that the danger of water being carried into the valve with. the steam is reduced to a minimum. 1' Y A further object of the invention is to provide a valve that will act as a valuable auxiliary to the superheater ordinarily used. In that, when dry steam is delivered to the superheater, it becomes unnecessary to heat the superheater to the deree necessary 4heretofore, and' to increase iler eiicie'ncy by providing a device that will increase the ca pacity o a'locomotive without increasing its size; to increase fuel and water economy, and

finally to increase superheater efliciency and of dry as be ore intiof there the steam as it passes throughthev .dry the as necessities of frequent attention.

A. further object4 of the invention is to so4 construct the valve that ythe point of entrance of the steam into the valve will beat a high point, .thus enabling the valve to be supported at a high point labove the water in 'the boiler, thereby lessening the likelihood of drawing over boiler moisture, and steadying the water in the boiler. y

' resultant 'disadvantages in operatlon, as well A still further object is to provide a valve in which the water of condensationwill not pass' through the valve, but be returnedto theboiler withino appreciableV loss Vin heat units. y l

In the drawings illustrating the invention,

lFigure 1 is a vertical section of the valve, constructed 1n accordance with my invention.

Figure2 is .a detail section taken about the l line A-l of Figure-1, showing a portion of the turbine ring or cage through which the steam passes before entering the valve body.

Figure 3 is a front elevation of the valve.l

Figure '4 is a side elevation, showing the osition of the valve in ay boiler, such as a ocomotive boiler. 'V

Referring to the dgawings, the numeral 1 designates the stationary body portion of thevalvewhich is provided with ports 2 at .proper intervals. It is formed with a cen tral inverted dome portion 3, to make ro'om for the headof the pilot valve which will be later described. The body is formed with an annular lian e 4, which is'bolted to a similar iiange 5 of t e outlet pipe 6. Surroundin the valve body is a cylin- Adricalcasing anged at its bottom, as inl dicated 8, and secured to the flange 4:. by

bolts 5.y The upper end of the casing is rovided with an annular fiange 9, which or'ms a seat for a iiange 10 of a turbine rlng or cage 11, the ring being made upin the main of. a seriesl of vanes v12, so spaced apart, and so formed, that they will present angular openings 13, through which steam passes, w1th a whirling motion, into the steam space or conduit 14, formed between the casing shell and? the body of the lvalve. The to of the cage is closed by a plate 15, secure to the ring in any suitable manner. Within the valve body is a cylinder 16, which is bored throughout the greater part of its surface, to form small apertures or nozzles `17, contracted at their inner. ends and arranged in circumferential rows, as clearly shown in Figure 1. The upper end of this cylinder is formed with a short annular flange 18, which abuts against a rib 19 on the valve body, thus providing opportunity for an annular vertical recess 19', which makes the perforations or apertures in the upper part of the cylinder accessible to the steam as it passes through the ports in the valve body. The lower end of the cylinder is provided with a flange, indicated at 20, which rests upon the flange of the outlet pipe and is received within a recess 21 ih the thickened lower part of the valve body,

as shown. Thus this flange 20, together' with the metal of the valve body, serves as a gasket. integral with the bod of the valve is formed an upstanding ange 22, bevelled at its upper ed e, as indicated at 23, to forma .valve seat or the correspondingly bevelled end 24 of the slidable stop valve 25. This valve snugly ts against the upper part of the valve body, and against the plate 15 of the cage 11.

The central portion of the valve 25 is enlarged as indicated at 26, and the enlargement is bored as indicated at 27, to form a recess for the passage of steam under proper conditions as will now appear. largement is further bored and threaded for receiving a threaded sleeve 28, in which works the stem of the pilot valve. The lower part of the stem carries a head 30, designed to limit the upward movement o'f the pilot valve as a whole, and the stem above the head is provided with a plurality of splines 31, which serve to space the stem away from the inner periphery of the sleeve, and thus form steam passages through which steam may pass to the space between the dome of the valve body and the top of the stop valve, to balance the valve. The upper part of the sleeve is provided with a bevelled seat 32, and the upper part of the'pilot valve stem is enlarged and bevelled as indicated at 33, thus forming a valve that cooperates with the seat 33 to open and close communication as the exigencies may require.

The upper end of this pilot valve is bifur-A cated as indicated at 34, for the reception of a cross bar 35, which is held centrally in the bifurcation by a pin 36. To the outer ends of this bar are connected the upper .ends of the operating levers 37. Formed upon the outlet pipe and oppositely disposed are two hanger ears 38. These form bearings for a rod 39, to each end of which is ixedly mounted a bell-crank lever 40, and to the arms 41 of these levers are pivoted the lower ends of the operating levers37. Tight on the rod 39 is a sleeve provided centrally with a link 43, to`whose lower end is pivoted the valve operating rod 44.

This env Leemans Integral with the Harige ofthe outlet' pipe is an inclined plate 45, 'whose lowerv edge,

" inder. This is for the ,purpose ofv permitting steam to have accessafter passing through the ports to'reach' the lowermost nozzles or perforations in the cylinder. 4

- At intervals this iange is provided with drain holes 49, and similar holes are provided in the\casing 7, as indicated at 50. Thus is will be seen that any' accumulation of moisture or water from the steam will be led back into the boiler with no appreciable diminution in heat units.

Claims:

1. In a steam valve, in'combination, a

ported hollow body closed 'at its top and provided with' an annular valve seat, a casin there rom, a stop .valve enveloping a portion of said body and slidable over the ports therein and adapted to seat on said seat, the casing together with the stopv valve formin a steam conduit communicating with sai ports when said stop valve is open, a cage 'at the entrancel of the conduit including means for dividing the steam into attenuated surrounding' said body and spaced streams and directing the resultant currents y into .said conduit, a cylinder in the valve body and rovided with nuinerous small holes constitutin nozzles communicating with said ports w ere-through the steam iswire-drawn and dried'` in passing into said cylinder. I

2. lln a steam/valve, in combination, a. h-ollow body having ports therein, and a valve seat below said ports a stopvalve enveloping a portion of said body and slidable relative thereto, over said ports, and adapted to seat npon the valve seat, a casing surrounding said valve and spaced therefrom, said casing, together with the body ofthe stop valve, forming a conduit communicating with said ports when said stop. valve is o en, a cage located at the top of said con uit said cagefbeing closed at its top and formed of numerous vanes through which the incoming steam is directed into said conduit, a cylinder lin the hollow body and provided with numerous small holes constitutin nozzles through which the steam is wirerawn and dried, said nozzles communicating with said ports'.

3. Tn a steam valve, in combination, a ported hollow body closed at one end` and llO iis

iatA

.valve enveloping a portion of said body and slidable over the ports therein, a casing surrounding said body and spaced therefrom and forming the outer wall of a steam con'- duitl communicating with the ports of said hollow body when said stop valve is open, a

i cage located at-., thel entrance of the conduit, said cage being closed at its top and com prising numerous vanes so positioned .as to form steam passages upon axesl different from the' axis of the hollowl body, throughwhich'the incoming steam passes and is di rected into the conduit, a -cylinder in the body and provided with lnumerous small holesl constituting nozzles', communicating with the ports, said holes being arranged circumferentiallyV of the .said cylinder and means for balancing the steam pressure on -b0 th sides of the stopvalve.

' 4. .In a steam valve', in combination, a hollow body having ports therein, said bodyl being closed at its top and provided with Van annular valve seat, a stopvalve-surrounding said body slidable over said ports, an-:l

adapted to seat upon the .valve seat, acasing surroundingthe body and spaced therefrom. and forming with the body of thestop'v'alve,

a conduit communicating with said ports lwhen said stop valve is open, a' cage surrounding the body at the entrance of'said conduit, closed at its top and open at its bottom, said cage including numerous vanes spaced apartto form steam passages through which steam is directed into said conduit, a cylinder in the body and providedY with nu l y merous small holes constituting nozzles communicating with the ports, saidholes being .arranged circumferentially in the cylinder, said' cylinder at its lower 'end being spaced ,from the valve seat to `form an 'annular' draiuway,'there being provided. at the botf Stom 'of' the drainway means for'permi'tting.

the water of condensation to drain back into the boiler.

" 5. In a steam valve, in combination, a hol-.

f low portedbody closed atits top, and provided withf'an annular valve'A seat, a casing. [surrounding4 said body and spaced there-1A from, a stopvalve enveloping a portion of body and slidable over the ports thereand adapted to seat on said seat, the cas- I together with the stop valve, forming va steam conduit Acommu'nicatin with the 1ports in said hollow body when t e stop va ve is open, and a cylinder in thevbody and 1'o:l

vided with numerous small'holes constituting nozzles where-through the steam is wire-drawn and dried `while passing into said cylinder, said nozzles communicating with said ports.

6. In a steam valve, in combination, a hol; `low body lhaving '.-steam inlet ports therein and provided with an annular valve seat, a' cylinder/in Ithe hollowbody and provided with numerous small oholes constitutin nozzles, wherethrough the steam is drie in vpassing into.' said cylinder, said nozzles communicating with said ports, said cylinderv being spaced from the seat' to form a drainway around said cylinder, means for conducting the water of condensationffrom cylinder in l the hollow body and having steam passages through itsjwalls, communi-l cating'with said ports, saidc linder beine.,r spaced-from thev valve seat to orm a drain way around said cylinder and'means for conducting the water of condensation frompsaid drainJway back intothe boiler, and a stop valve slidableon said body over said ports,

and adapted to seat on saidseat.

8. In a steam valve, in combination, a hollow ported body`clo`sed at one end and provided with an annular' valve seat, a 'casing surrounding said body and spaced therefrom, a'vstop'vvalveenveloping a portion ofI said body and adapted to seat on said seat, the caslng arranged to cooperate with said hollow body Ato form a steam conduit com-l municating with the ports infsaid body when v said stop valve 1s open, means within theV hollowbody for wire-drawing and drying the steam after it passes through said body.

v In testimony whereof he ture.-

)PASQUALE Pasolini.

aixes his signa-

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