US953403A - Fluid-pressure regulator. - Google Patents

Description

W. V. TURNER.

FLUID PRESSURE REGULATOR.

2 SHEETS-SHEET 1.

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FLUID PRESSUEE REGULATOR. APPLICATION IYILBD 1'33. 13, 1906.

Patented Mar. 29, 1910.

2 BHEETB-SHEET 2.

. sure normally supp Application filed To all 'urhom. may concern:

Be it known that l, Wnnrnn V. Tonnes, a citizen of the United States, residing in Vvilkinsburg, the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Fluid-Pressure Regulators, of which the following is a specification. 5 This invention relates to fluid pressure regulators, and has for its object to provide an improved valve mechanism for control- 1' ling the supply of fluid from a source of. higher pressure to a pipe or compartment in which it is desired to normally maintain the 1 pressure constant at a predetermined lower i degree.

While thisimproveinent is adapted for 1 general use, it is particularly designed to be employed as a feed valve device in air brake systems for limitin the degree of air presied from the main reser- 3 voir to the train brake pipe of the system, and comprises an improved valve mechanism adapted to more accurately regulate the pressure and to more rapidly supply or feed the train pipe pressure up to the predetermined maximum degree after a reduction has been made in the train pipe pressure and communication from the main reservoir is 5 again opened through the feed valve to the i train pipe for restoring the normal degree of pressure therein. It has heretofore been proposed. to employ a main valve operated by a piston or controlling the flow of liquid, and to govern the pressure on said iston y means of a regulating valve operated by the opposing prespartment, or train pipe, and an adjustable spring, and the regulating valve has been v designed to control the release of fluid from 5 one side of said. piston either to the com- I part-merit on the outlet side of the valve or to the atmosphere.

According to the preferred :lci'nrof my present ii'nprovement, I employ a. movable abutment tor operating the main valve an govern the pressure upon the opposite faces i said sbut-i'nent or piston heads by any ll'lil e Lit-21113, such as two regulatii valves i l the preside on rho train pipe r0 side of the main 'valvef he said iriuin valve will sures of the fluid 1n the low pressure com.- I l ruary 13, 1.383.

5 outlet side 4 "it HE WEST- -Jl, LOEPORATION' 5:312217. life. 36a),

In the accompanying drawings, Figure 1- is a vertical section of a pressure regulating alve device embodying my improvements; Fig. 2 an end elevation of the same, the lower portion of the casing containing one of the regulating valves being broken away to .more clearly show the spring adjusting device; Fig. 3 a. detail view showing the adjusting wrench or handle; Fig. 4 a side view, partly in elevation and partly in' section, showing a modified form of adjusting device; and Fig. 5 an end view of this moditicd structure with a part of the casing broken away.

According to the preferred construction as shown in Fig. 1, the fluid pressure regulator (bniprises a main valve 6, which is shown in the form of a slidevalve operating in the chamber 7 and controlling the outlet port 8 communicating with the low pressure side or train pipe space 9, the valve chamber being'in open (761111! iication with the high pr or source of supply or main reservoir through ge 10. v The main valve is preferably operated by a movable abutmi-ant in the form o'f'two piston heads 13 and lei, the inner or adjacent sides of which. are subject to the pressure of the valve chamber 7, while the outer or op respective regulating valves 19 and 18.

Any suitable means may be used for controlling the pressure in said chambers ac the variation of pressure on the of the valve device, but I prefer to employ a diaphrag'n'i 20, subject on one side to the pressure in diaphragm chamber which communicates by passage 3?; with the outlet pre which it desirei,

cording to an initil the desired deto engage the regulating valve 19 and also having a stem 23 extending out through the adjusting nut 24 and adapted to engage at certain positions with the stem 28 of regulating valve 18.

The main valve 6 is normally held in its wide open position by means of spring-17, as indicated in Fig. 1, when the pressure upon the opposite faces of the pistons is equalized. The piston heads 13 and 14 may be of the same size, but are here shown as of slightly different diameters, in order to facilitate the assembling of the parts. Fluid under pressure being supplied through. inlet 10 to the valve chamber 7 it leaks around piston heads 13 and 14 to the chambers 12 and 11, and as the regulating valve 18 is closed the pressure in the chamber 11 will be equal to that in valve chamber 7 The spring 22 being adjusted to the desired degree of outlet pressure to be maintained presses on diaphragm 2O and-opens regulating valve 19, so .that fluid which leaks around piston 13 to chamber-12'is released or permitted to flow through chamber 21 and passage 33 to the outlet passage 9. The mainvalve then remains wide open and fluid flows rapidly through port 8 to the outlet 9 communicating with the compartment or pipe in which it is desired to maintain a certain maximum degree of pressure. As the pressure rises in this outlet passage, and consequently in the diaphragm chamber 21, to nearly equal that 3 for which the spring 22 is adjusted, the diaphragm is moved out against its spring thereby permitting the regulating valve 19 to close.

' chamber 12 to equal that in the valve chamton acts to move the slide valve 6 to close the supply port 8. I

As long as the pressure upon the outlet side and on the diaphragm remains at the desired maximum degree, there is a slight ilovv' of compressed fluid from chamber 11 to the atmosphere, so that the greater pressure on the opposite face of the piston holds .the main valve closed. As soon as the outlet pressure is diminished by leakage or otherwise, the spring 22 moves the stem 23 to permit the valve 18 to close. The pressure will then equalize aroundthe piston 14 and the spring 17 will tend to open the main valve. Should there be any tendency of the The pressure then accumulates in main valve and pistons to stick and not open promptly, a very slight further movement of the diaphragm under spring 22 acts to open the regulating valve 19, causing a venting ofthe pressure from chamber 12 i on the outer face of piston 13 and a prompt and positive opening movement of the main valve. It will be apparent, therefore, that my improved device will operate quite well without the spring 17 and that the same may be dispensed with, if desired.

Bythe use of the diaphragm and regulating valve mechanism for controlling the pressure upon the outer faces of the movable abu-tment or piston heads 13 and 14, a prompt and positive action of the main valve is insured in both its opening and closing movements.

When used as a, feed valve in air brake systems, it is often desirable to adjust the spring 22 from one certain pressure to another, as for a train pipe pressure of pounds persquare inch in or inary braking and 110 pounds per square inch in brak- .ing for high speed trains, and order to 'two friction bands 29 and 30, mounted on the casing 34 and having projections 31 and 32 respectively. The adjustingnut24is provided with polygonal head, preferableight sided, to allow for small angular ad justments, on which is mounted a small wrench 25 having a bent handle 26 for engaging theprojections or stops 31 and 32 on the friction bands. A nut 27 may hold the wrench in place. v a

The frictionbands-are clamped onto the casing sufficiently tight to prevent accidental displacement, but may be shifted around by tapping the projections with a hammer or other implement, to such positions as to give the desired adjustment to the spring 22 when the handle 26 is turned to engage one or the other of said projections 31 or $32 of the respective friction bands.

Other means may be devised for limiting the adjustment of nut 24 to either of two positions, as shown, for instance, in Figs. 4 and 5 of the drawings. According to this construction, the wrench is made in the form of a hand wheel 37 and is adapted to engage an adjustable stop ring 35 having lock nut 36 mounted on casing 34, and in the opposite direction may engage a stop pin 38 adjustably supported on the valve casing and having a lock nut 3;). It will now be evident that the adjustable stops may be readily set in such positions as limit the adjustment of nut 24 in its extreme positions regulator for either class of service.

ensues governed by the fluid on the out-let pressure for controlling the rel use from oppositefoees of said moveble abutment.

2. A fluid pressure regulator comprising main valve means, a. piston normally subject on opposite sides to equal. pressures for opening and Mpiston normmly subject on opposite sidesto equal pressures crsing said valve means, and mechunisn QOVel ed by the outlet pressure for con rolling the pressure acting on said pistons.

A fluid pressure regulator comprising initili valve means, a piston for opening and ,e' piston for closing sue? valve means, said oistons having means for normally equalizing the fluid pressi'u'e on opposite sides and regulating valve mechanismgoverned by the outlet pressure for controlling the release of fluid from one face of each or said pistons, to actuate saidvulve means.

l. A liuid pressure regulator comprising a main vslve, pistons subject to fluid pressure on one oi? their faces for operating said valve, and reguleting mechanism governed by the outlet pressure for controlling the release of iiuid under pressure from. the opposite faces of said pistons, to thereby e.ctu-. ate said main valve.

5. It fluid pressure regulator comprising at main valve, pistons subject on one side to the pressure of the valve chamber for operating said valve, means for permitting a slow leakage of fluid past said pistons, and regulating mechanism for controlling the release of fluid from the chambers on the opposite feces of said pistons.

6. A fluid pressure regulator comprising a main valve, pistons subject on one side to the pressure of the valve chamber for opersting said valve, .means for permitting; t; slow leakage of fluid pastiseid pistonsg' s regulating valve for venting fluid from Lill e opposite side of one piston to the low pressure compsrtmen't, another regulating vulve for venting fluid from the opposite side of the; other piston to the atmosphere, .ond means governedby the outlet pressure for actuating theregiflsting valves.

"7. In. a fluid pressure regulator, the e "nbination with a main valve and move.v le abutment for operating the some, of e regueating and adjusting nut for. said sprii leting valve for controlling the pressure on one toes of said abutment, another regulating valve for controlling the pressure on an opposite ioce oft sold abutment, and e diuphragni subject to the outlet pressure for actuating seid regulating; valves.

8. A iiuid pressure regulator comprising a main slide valve normally held to its seat by the inlet pressure, a. movable ubutment subject to the inlet pressure for operating said slide valve, and regulating valve inechanism governed by the outlet pressure for controlling the release of fluid from opposite feces of said abutment.

A fluid pressure regulator comprising at main valve, pistons subject to the inlet pressure for operating said valve, regulatlIig"'ViliVGS for controlling the release of fluid from the opposite feces oi? said pistons, a diaphragm subject to the outlet pressure for actuating suid regulating valves, erredjusteble spring, end-adjustable stops for limiting the renge'offadjustment of said sprin ll). it. fluid pressure regulator comprising a valve for controlling the flow of fluid, means sub ect to the fluid pressure on one i side of an, adjustable spring on the other for controlling the action of said valve, a

, 2 two rriction bands mounted on the casing and each having a projection or stop, and en arm carried by the adjusting nut for engaging said stops.

11. A fluid pressure regulator comprising u main valve, a movable abutment for opersting said valve means tending to maintain the fluid pressure on said abutment in equi librium, valve means governed by the outlet or low pressure for controlling the pressure on .one side of said abutment to actuate the some, and additional means, operated by said pressure controlling means, for also actuating seid abutment.

12. A fluid pressure regulator comprising a, valve for controlling the flow of fluid, means, subject to the fluid pressure on one side and an adjustable spring on the other, for controlling the action of said valve, and adjustable" stops, having a. relative movement to each other, for limiting the mugs of adjustment of said spring. I

In testimony whereof I have hereunto set my hand.

WALTER V. TURNE R.

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