US1744331A - Steam valve - Google Patents

Description

Jan. 21, 1930. p, PASCAL}; 1,744,331

5 TEAM VALVE Filed Nov. 12 1925 2 Sheets-Sheet 1 45 42 E ,4; Z i ,/Jfi E I 44 55 0 m 29 J 25 I a 25 24 /a v 2/ I A Z 23 l 25 gwuewto'c Jan. 21, 1930. P. PASCALE STEAM VALVE Filed Nov. 12, 1-925 2 Sheets-Sheet 2 Patented Jan. 21, 1930 .JUNI-ITED star-Es PASQUALE PASCALE, OF NEW YORK; N. Y.,

OFF IfiE ASSIG-NOR TO DRI STEAM VALVE CORPORA- TION, A CORBORA'IION .OF DELAWARE STEAM VALVE Application filed November This invention relates to improvements in steam valves.

In the valve about to be described the objects sought to be accomplished are in the main, the same as those sought in thecon- '10 and delivered to its work at substantially the boilertemperature, and to provide, in a novel arrangement, means for bypassing the steam around" the steam drier element of the valve.

Another object of the invention is to so combine with a stop valve, a mechanism that will so control the direction of steam flow in passing through the valve, or into the valve, that its velocity will be increased and the steam will be broken up and dried and the entrained water be returned to the boiler with infinitesimal loss of heat units.

The valve about to bedescribed, which is a combined stop and sleeve valve, is of a very substantial and rugged construction, and requires the minimum of attention, maintenance and upkeep.

The valves are made of a size suitable for the purposes primarily intended, but are well adapted for use on separate lines from boiler header or nozzles to auxiliary devices, such as sootblowers, fuel oil atomizers, etc., and in fact in any connection where there is required dry steam for satisfactory operation.

In the drawings illustrating the invention, Figure 1 is avertical section of the valve.

Figure 2 is an elevation partially broken away.

Figure 3 is a plan view of the valve head with the yoke members insection.

Figure 4 is a plan and partial elevation of a modified form of valve wherein the valve is installed at the boiler with the stem iorizontal, whereas the valve in the main :[igures is intended to be installed at the boiler with the stem. vertical.

Figure 5 is a sectionalview showing the manner of mounting the valve in a difierent form of valve body.

Referring to the drawings, the numeral 1 12, 1925. Serial No. 68,719.

designates the valve body, flanged as indicated at 2 for-attachment to the boiler, and as indlcated at 3, :l'or attachment to the steam pipe. The numeral 4 designates the inlet opening and 5 the'outlet. The upper part of the inletopening is threaded internally as indicated at 6, for the reception of seat ring 7, which ring is flanged as indicated at 8, and serrated as indicatedat 9, to permit the ready insertion and removal of said ring in assembling or disassembling.

The numeral designates the valve disk. This is formed with a central boss 11, internally threaded as indicated at 12,1?01' the reception of lock nut 13, which is forced down on the flange 14: of head 15 of the valve stem or spindle 16. Theboss 11 and the head 15 are provided with apertures for the reception or cottei pin 17. The valve stem or spindle will be further described presently.

The numeral. 18 designates a cylindrical sleeve, open at its bottom, and closed at its top, by a plate 19, preferably integral with the sleeve. The top is provided with a central opening to receive a stud E21, by which i the valve disk is firmly secured to the sleeve.

The sleeve is provided throughout its entire periphery and for about half its depth, with a phirality attenuated openings, or nozzles 22. ward the outer periphery of the cylinder. These nozzles are arranged in circumferential rows, preferably equally spaced apart, both circrunifcrentially and verticzlly. As will presently appear, when the valve is operated, a distinct and predetermined number of rows, or a single row, as the case may require, may be exposed for the admission of steam into the outlet pipe, according to the extent to which the valve is lifted, which as will appear later, is indicated upon a suitable indicator. The sleeve is provided at its lower end with large ports 23, so that when the valve is lifted sufficiently high the steam is by-passed and may flow freely through the valve. At such time the drier is put virtually out of commi an, so that the valve functions like an or nary valve, when no economy is expected. However, it has been found by experiment, that thoroughly dried These openings may slightly flare to-- steam may be supplied for all ordinary needs and that this can, with my arrangement, be accurately governed or controlled.

The seat ring 7 is provided with a. bevelled seat 24 upon which seats the bevelled portion 25 0f the valve disk, and obviously when the valve is in the seated position, which is shown in Figure 1, the valve will be entirely closed.

Secured to the top plate 19 is a cage or turbine 28. This is formed of a top rin 29, and a bottom ring 30, and between the rings are arranged a series of vanes 31 so spaced apart as to provide attenuated openings Some of the vanes as shown in Figure 4, are tangential to the rings in one direction and others, in another direction, and these plates or vanes are so positioned relative to the opening in the nozzles 22 that the openings between the vanes and the nozzles will be out of registry, so that the steam, which is forced through the vanes with a velocity greater than the velocity at the inlet, is caused to be broken up into separate streams which forcefully impinge against the inner wall of the sleeve, whereby the water is separated therefrom and flows back into the boiler. The bottom ring 30 of the turbine or cage has several lugs 30 on its outer edge which engage the inner periphery of the cylinder or sleeve, thus spacing said ring from the sleeve, and incidentally forming passages through which the water of condensation may trickle back into the boiler. The top ring of the turbine may be secured to the valve disk by dowel pins 33, by which, as a matter of fact, the whole cage is secured to the disk.

The number 34 indicates the valve head which is secured to the valve body by bolts 35 in the usual manner. In the lower part of the head is threaded a bushing 35, and above that, and interposed between said bushing and a gland 36, is suitable packing 37, through which parts the valve stem 16 passes and is packed in the usual manner. The head is provided with the usual yoke 38, provided with a top opening 39, in which there is received the stem-nut 40, through which the threaded portion 41 of the stem passes and operates. To a reduced portion of this stemnut is keyed the hand-wheel 42, and upon the upper threaded end of the stein-nut, is a lock or check nut 43.

Secured to one member of the yoke is an indicator 44, provided with a series of numbered graduations 45, and cooperating with the scale is a pointer 46 which is carried by the stem, so that in operating the valve the operator may readily ascertain to what extent the valve is open, and incidentally how many rows of nozzles are exposed above the valve seat, thus giving the alve capacity for being operated with great nicety and accuracy according to the amount of steam supply required.

The graduations upon the scale are so arranged that when the pointer is at the last or topmost graduation, the ports 23 will be above the valve seat, when, as before intimated, the valve operates or functions as an ordinary valve.

In the modified form, Figure 5, the numeral 47 designates the valve body flanged as indicated at 48, for attachment to the boiler.

The numeral 49 indicates the inlet opening, and 50 is the outlet opening, surrounding which, is a flange 51, for attachment to the steam pipe. \Vith the exception of the interior formation of the valve body the mechanism above the valve head is the same as that hereinbefore described, and the valve is the same. In this arrangement there is provided upon the web 52 a seat ring 53, having valve seat 54 upon which the lower part of the valve disk 55, seats, which is, in this detail like the valve already described. The web described forms an integral part, as shown, of the valve body.

It is desirable that the valve be attached directly to the boiler, whether in horizontal position or vertical, or whether attached to the side of the boiler or to the end.

From the foregoing it is believed that the operation of the device has been fairly indicated, but nevertheless a brief description of the operation follows:

When the hand-wheel is operated the valve is lifted from its seat and as the stem rises, steam from the boiler passes first through the space between the vanes of the cage or tun bine and is broken up to an extent, and the direction of the current is changed by reason of the peculiar shape of the vanes, and projected against the inner wall of the cylinder, and through the contracted ends of the noz zles, where the currents are further broken up and separated and dried, and admitted into the valve body chamber in a thoroughly dried condition, and at substantially boiler temperature, due to the fact that the parts over which the steam passes are in higl'ily heated condition and virtually at boiler tem perature. The moisture from the boiler steam which has been dried out will flow back into the boiler.

In the modification the operation of the valve is for all intents and purposes identical with that described. The hand-wheel is operated, and through the threaded valve stem, will close the valve, or open it to any dc sired degree in order to expose above the seat the required number of perforations, it bein understood that the construction of the valve with regard to the nozzles and turbine and cage, are identical with that shown in the main figures.

Claims:

1. In a steam valve, in combination, a ho]- low body having an inlet and an outlet, a valve seat in the inlet opening, a stop valve adapted to seat on said seat and comprising a movable sleeve having numerous attenuated holes therein, forming nozzles through which the steam passes into said body, a cage within the sleeve and moving therewith, and formed with numerous vanes so spaced as to form steam passages through which the steam must pass to reach the nozzles, the vanes and nozzles serving to break the steam up into streams, and means for moving the valve to expose more or less of the nozzles, for the purpose set forth.

2. In a steam valve, in combination, a hollow body having an inlet and an outlet, a valve seat in the inlet opening, a stop valve adapted to seat on said seat, a sleeve valve carried by the stop valve and adapted to move therewith, the sleeve valve being provided with numerous attenuated holes therein forming nozzles, means within the sleeve valve and carried thereby for dividing the steam into streams, and causing the said streams to impinge forcefully against the inner periphery of the sleeve valve adjacent the nozzles, means for permitting the water resulting from such impingement to return back into the boiler, and means for moving the valve as a Whole, to seat or unseat the stop valve and to open and close a greater or lesser number of the nozzles.

3. In a steam valve, in combination, a hollow body having an inlet and an outlet, a seat ring secured in the upper portion of the inlet opening and provided with a valve seat, a valve comprising a valve disk having a portion adapted to seat upon said seat, said disk having secured thereto a cylinder, the upper part of whose walls is provided with numerous attenuated openings constituting nozzles, a cage within said cylinder and provided with numerous vanes so spaced apart as to provide contracted steam passages through which steam must pass before reaching the nozzles, said cylinder having ports in its lower portion adapted, when the valve is at its highest point to permit free passage of steam through the cylinder, and means for moving the valve to expose more or less of the nozzles to permit more or less steam to pass into the valve body, and means for determining the extent to which the nozzles are exposed, and thereby determining the amount of steam that passes through the valve.

4. In a steam valve, in combination, a hollow body having an inlet and an outlet, a valve seat in said body, a combined stop valve and sleeve valve, the stop valve being adapted to seat upon the said valve seat, and carrying the sleeve valve, said sleeve being slidable within the inlet and provided with numerous attenuated openings forming nozzles, a tur bine arranged within said sleeve valve and formed with numerous vanes spaced apart and so shaped as to form steam passages arranged on axes difl'erent from the axis of the sleeve valve, the passages between said vanes being out of registry with the openings constituting the nozzles, and means for opening and closing valve as a whole.

5. In a steam valve, in combination, a hollow body having an inlet and an outlet, a valve seat in said body, a combined stop valve and sleeve valve, adapted for simultaneous movement, the stop valve having a portion adapted to seat upon the valve seat, the sleeve portion of the valve being provided with a plurality of rows of attenuated openings arranged circumferentially therein, a cage arranged within the valve and movable therewith, said cage being provided with a plurality of vanes spaced apart, and so formed as to provide steam passages, said passages being arranged on axes different from the axis of the sleeve, said passages being out of registry with the openings constituting the nozzles.

6. In a steam valve, in combination, a hollow body having an inlet and an outlet, a valve seat in said body, a combined stop valve and sleeve valve adapted for simultaneous movement, the stop valve having a portion to seat upon the valve seat, the sleeve portion of the valve being provided with numerous attenuated openings, means associated with the sleeve valve and movable therewith through which the steam must first pass in entering the valve body, said means being spaced from the inner periphery of the sleeve, adjacent the openings, to form passages for permitting the water resulting from the impingement of the steam against the sleeve, to return to the boiler.

In testimony whereof he affixes his signature.

PASQUALE PASCALE.

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