US1098616A - Pressure-regulator. - Google Patents

Description

J. L. @Mmmm-a PRESSURE REGULATOR..

APPLOATION FILED DHC. 1l, 1908.

Fini? JOHNL. CREVELING, OF NEW YORK, N.

STANDARD HEAT AND VENTILATION CORPORATION F NEW YORK.'

fr.. assIeNon. nr Mnsms AssIeNMEN'rs, To COMPANY, INC., or NEW Yoan, N. Y., A

PBESSURELREGULATOR.

Specication of Letters latent.

Patented June 2, 1914.

Appiicationufiied Decemberii, 1908. seriaino. 466,967.

To all whom, 'it 'may concer/i `Be it known that L JOHN L.'Cniivnnine, a resident ot New York, in the-county and State of New York, have invented la `cer-` ll'ii the drawing I have shown one form.

ot' pressure regulator embodying` my invention and have chosen for illustration a type adapted to be placed on a locomotive and supply steam for heating a train drawn thereby. For this particular service the regulator is called upon to deliver a constant outlet pressure throughout reasonable changes iu the locomotive boiler pressure and throughout Wide variations in the amount of steam necessary to hea-t the train, depending upon whether it may have one or many cars. Further, in this service it is not only necessary that the regulator shall deliver a constant outlet ressure but shall also be adjustable so tiat low pressure steam may be delivered in fairly warm weather and fairly high pressure in eX- 4tremely cold Weather.

Figure I of the drawing represents a vertical section ot my improved regulator and Fig. Il a top tion thereof as may be readily understood from the following description.

ln the drawing, (1) represents the body portion of the regulator provided with a threaded inlet (2) communicating with a high pressure chamber (3).

(4.) represents a low pressure chamber communicating' with the threaded out-- let (5).

The chambers (3) and (il) ot the body portion (1) are connected by the screw threaded aperture (6) into which is screwed a member (7) having a cylindrical opening therethrough indicated at (8) and carrying* i'our members or webs (9) which torni part ot the cylindrical portion (10) which is plan of the main body poradapted ito tit tightly into the cylindrical portion of. the body (l) asiindicated at` (11). The cylinder (10) is provided with an expanded portion .(22) `which is `adapted `to makenJ tightjoint againstthe abutting sur face Vof the body `portion `as indicated at (23).

(12) isa piston fitted closely to the cylinder (1.4)) and maybe .provided `with an extension (13) and piston rod y(14) carrying the valve (15) adaptedto seat against the member (7) as indicated at (16). The valve (1 5) is provided with a grooved portion indicated at (17) and tour extensions or `guides as vindicated at (18). The space between these extensions or guides terminates in V shaped openings indicated t (19), the function of which will hereiir after more plainly appear.

i (20) represents a web or diaphragm portion at the end of cylinder (10) which may serve i'o hold the spring (2l) tending `to press againstthe piston (12) in such manner as to hold the valve (15) against the scat (16) as shown in the drawing.

The bore of. the cylinder (10) behind the piston (12) defines the cavity or chamber (24) which is closed at the end as by the plug' (25) provided with a cylindrical bore ('26) closely fitting the plunger or eXtension (1S) in, such manner as to cooperate therewith to form a dash-pot.

The .top of the body portion (1) which constitutes the main casing member is also provided with a circular flanged portion (27'.) having a central raised portion (28) upon which may be placed a light metallic diaphragm (29) so as to deiine thereunder an annular cavity (30) communicating with the low pressure chamber (4:) as by port (31).

The small port (32), the elective resistance ot which may be regulated by the screw (33), communicates with the high pressure chamber (3) and the port (34) which registers with the port (35) of the cylinder portion (10) in such manner asto communicate with the chamber (24) which is at the rear of the valve operating piston (12). The port (36) communicates with the port 34) and has one of its ends terinitiating` against the diaphragm (29).

From an inspection of the drawings it will be noted that the port 31 constitutes a by-pass or passage way which leads from the interior of the annular cavity 30 through the walls of the casing'to the interior of the low pressure or outlet chamber 4.' The ports 32, 34 and 35 are alllocated 1n the walls of the casing and extend along the same so as to provide asmall passageway extending from the high pressure or inlet chamber 3 to the rear of the valve piston 12.

(37) represents the bonnet of the regulator, screwed upon the member (27) 1n such manner as to firmly hold the diaphragm (29) in place and form a pressure tight J'Qintl (38) is a circular -dlslr placed upon the diaphragm (29) and' arranged so as to be pressed downwardly against the same by the spring (39) in such manner as to tend to firmly hold the diaphragm against the end of the port (36) so as to tend to lhold the vsame closed. The bonnet (37) is provided with a threaded portion (40) engaging the threaded member (41),'revoluble as by the hand Wheel (42) in such Vmanner that the pressure exerted by the spring (39) upon the diaphragm (29) may regulated thereby.

The Ismall port (43) may be drilled through the valve (15), piston rod (14) and extension (13) and plugged up as by means of screw (44) if desired, for a purpose which will hereinafter more plainly ap ear.

45) represents a small opening adaptedv to drain the 'cylindrical portion (10).

The practical operation of my improved ressure regulator is substantially as folows: If the inlet pipe bel properly made up into the threaded portion (2) and the outlet pipe into the threaded portion (5) and high pressure steam admitted into the chamber (3), the same will tend to close the valve (15) firmly upon the seat (16) so as tov prevent passage of steam through the o ening (8) into the low pressure chamber (E), and some high pressure steam will also pass through port (32), port (34) and port (35) into chamber (24) back of the piston (12) and force the same forward against the actionl of spring (21) and the pressure against the smaller area of the valve (l5) so as to open the valve (15) and allow steam to pass into the low pressure chamber (4) iu a manner which will hereinafter be more fully explained. As soon as the required pressure, as may be determined by the spring (39), shall have been reached within the chamber (4) and within the chamber (30) communicatin therewith through the port (3l) the diap ragm (29) will be lifted so as to open t-he port (36) into the low pressure chamber (30). i

The opening of the port (36) will tend to decrease the pressure in the chamber (24) until the piston (12) takes such position that the valve (15) isin a proper position to give the required outlet pressure in the chamber(4) at which point the diaphragm will assume such position as to allow just enough steam to escape from .the port (36) as will hold therequired pressure in the chamber (24) to keep the valve in this position. Any decrease in the pressure in the outlet chamber (4) will allow the diaphragm to lessen the amount of steam bypassed through the port (36) and thus increase the pressure in the chamber (24) so as to cause the valve (15) to move forwardly so-as to open more widely and compensate for such decrease in the chamber (4) while any increase in the chamber (4) will cause the diaphragm to more widely open the bypass (36) and lessen the pressure in the chamber (24) so as to cause the valve (15) to move rearwardly so as to more nearly close, thus reducing the pressure in the chamber (4). In this way the regulator will tend to hold the pressure in the chamber (4) substantially constant regardless of the amount of steam delivered therefrom within reasonable limits for which the regulator is designed, and the pressure to be maintained in the chamber (4) may be determined by increasing or decreasing the p-ressure exerted on the upper side of the dia.- phragm b. s ring (39) as by screwing down the cap 41 or unscrewing the `same by means of hand wheel (42).

The screw (33) may be adjusted so as to regulate the comparative areas of the ports (32) and (36) so that the rati-o of the main port to the by-pass may be regulated as vdesired for the purpose of adjustment. Y

It will be noted that the type 'of'regulator shown in the drawing is capable'of giving a long travel to the valve which is 'done for the pur se of gradually increasing or decreasing t e effective area of said valve. In the type shown in the drawing-'this -is accomplished by the V shaped openings which together with the internal surfaceof the cylindrical opening (8) formV what might be termed a secondary valve, back of the valve (15) and its seat (16), so that when the valve (15) is lifted from its seat, considerable travel' may be given to the valve before the V shaped openings (19) g have suiiciently passed the edge of the cl lindrical opening (8) to have opened any appreciable effective outlet area at which time any wire-drawing will take place between the internal surface of the cylinder (8) and the edge of the V4 'shaped openings (19) rather t-han against the seat (16) and valve (15) p and thereby save the same from undue wear or cutting due to this cause. Further itwill be Obvious that as these V shaped'openings widen by increase in travel of the valve a given amount ofmotion may 'the valve to operate less suddenly than it be caused to gradually increase the eiiect-ive outlet` area of the valve for a considerable ralrgle.

e/i'unction of the spring (21) 1s to cause the valve (15) to always tend t0 assume a certain position without regard to the balance of the pressure upon the Jfront of the valve and the back of the p-iston (12) and for some uses is desirable, but under ordinary circumstances for locomotive work may be omitted.

The function of the dash-pot formed by the member (13) and cavity (3(5) is to cause would without the same and under certain conditions to prevent chattering.

While the regulator shown in the drawing is designed for high inlet pressure to be reduced to comparatively low outlet pressure it may be useful at times to have the same readily adjustable for low inlet pressure to an outlet pressure not far different from that of the inlet and for this purpose l have shown the port (43) through the valve stem (14) into the chamber (24) so that if the screw plug (44) be withdrawn high pressure steam may pass directly through the valve stem and into the chamber (24) in which case high pressure steam will tend to enter the chamber (24) both through the port (43) and ports (32), (34) and (35), and to be relieved by the port 36) upon lifting of the diaphragm (29), or under certain conditions, the regulator may be more applicable if the screw (33) be caused to close the port (32) entirely, when all steam. into the chamber (24) will pass through the port4 (43) and will be relieved through ports (35) and (34) and (36) upon raising of the diaphragm (29) as above described. i

It will be noted that the valve, valve seat, piston and spring as in use are all within the one member and that the annular threaded portion (7) together with members (9), cylinder (10) with expanded portion (22), form one member or casting which together with the valve, piston rod, piston and spring may all be assembled as` one unit which may be readily screwed into operative position. within the body portion (1) or removed and replaced by another like unit with very little difficulty and without necessitating the opening of the piping. Further, all of the wearing parts of the regulator may thus be easily removed or replaced without disturbing the body portion (1) and the valve (15) may be readily ground upon its seat (16) with little diliculty and without wearing any portion of the regulator forming a permanent partof the piping system. It will also be obvious that removal of the plug (25) will, allow one to operate the valve by hand to see if the same works freely, also to clean the i cylinder and the dash-pot and to ascertain whether or not steam flows clearly through the ports.

It will be obvious that this type of regulator shown contains no long small ports except the port (34) which may be straight and easily cleaned with a wire. also that the regulator contains uo small pilot valves requiring careful adjustment and that each time a new diaphragm is placed within the regulator the same provides a new pilot valve, so to speak. Further, it will be obvious that there is no portion of this type of regulator which forms a part of the piping system which fails to drain in such manner as to prevent any possible damage from freezing.

I do not wish in any way to limit. myself to the exact type of regulator shown in the accompanying drawing or described in detail in the specification above, as the purpose of the said drawing and detail description is to clearlyset forth one type of regulator which embodies my invention and which is shown and described in suliicient detail to enable one skilled in the art to make and use the same, for it is obvious that regulators didering greatly from the above described and illustrated regulator may be made without departing from the spirit of my invention which is as set forth in the following claims, to 'wit 1. A pressure regulator comprising a body portion having inlet and outlet portions, a removable valve seat and a valve, placed between said portions so as to form a governing means between the same, said members carrying therewith complete actuating means for actuating the said governing means.

2. In a pressure regulator having a body portion, the combination with means for dividing said body portion into a high pressure chamber and a low pressure chamber comprehending a valve, and a removable valve seat, of a removable cylinder united to lsaid valve seat and valve actuating means within said cylinder.

3. A pressure regulator comprehending a body portion, means for dividing said body portion into a high pressure chamber and 'a low pressure chamber comprising a valve and a removable valve seat .combined with valve actuating mechanism for actuating said valve comprehending a cylinder attached to the said removable valve seat.

4. A pressure regulator comprehending a body, portion, means for dividing said body portion into a high pressure chamber and a low pressure chamber comprising a valve and a removable valve seat combined with valve actuating mechanism for actuating said valve comprehending a cylinder attached to the said removable valve seat and means for establishing communication below pressure chamber comprising a valve i and a removable valve seat combined with L valve actuating mechanism for actuating 10 said Valve oomprehending a cylinder attaohed to the said removable Valve seat. means for establlshlng communication between the high pressure chamber and said :cylinder to operate said valve actuating mechanism and means for controlling the i kpassage ofy fluid therethrough.

. JOHN L. CREVELING. itnesses f C. J. STOCKLEY, JOHN T. CLARK.

Images