US2272132A - Valve - Google Patents

Description

Feb. 3, 1942. $HAAF 2,272,132

VALVE Filed July 1, 1940 3 Sheets-Sheet 2 Gcazje Selma/f INVENTOR ATTO NEY Feb. 3, 1942. SCHMF 2,272,132

VALVE Filed July 1, 1940 3 sheets sheet 3 FIG. 9. FIG. 10.

5a a? 29 46 2? 2a 28 .52 25 a4 34 3g 53 2 24- 2 2- 1 l -21 -17 I? I p1 I *4- 15- I I0 1/ 1a.

fiaagge Sclzazazf INVENTOR Patented Feb. 3, 1942 VALVE 1. "L147.

George Schaaf, Buflalo, N. Y. I r

Application Jilly 1, 1940, Serial No.'3l3,381

Claims.

This invention relates in general to valves and to a type of valve for controlling the passage to a container for carbon dioxide or other medium which is held in said container under considerable pressure, and especially to the class known as packless valves.

Where carbon dioxide is employed for fire extinguishing purposes the fluid is maintained under high pressure in a container. and at ordinary temperatures the carbon dioxide is in liquid form. On account of the high pressure der which the carbon dioxide is maintained a cial forms of valve construction have been devised for controlling the discharge from the container. To prevent leakage a preferred type is the so-called packiess valve in which a diaphragm is employed to close oi! the valve from its operating mechanism. In order to. have the contents of the container instantly available it is desirable to have a quick opening valve and one which will be fully opened by the valve spring and fluid pressure when once released. Also that means be provided to close the valve against the fluid pressure when'once opened, as in the case of a large container when partly discharged, and to prevent such closing until the entire tank contents is discharged, as in the case of a small One of the objects of this invention is to provide a valve of the packless type which can be fully opened instantly. either manually or automatically, for the release of the contents of the container to which it is attached.

Another object is to provide a valve of the above general type which may be closed after a portion of the contents of the container have been discharged.

Another object is to provide means to lock the valve in a closed position.

Another object is to provide means to prevent manual operation of the valve during dlsdharge.

with the foregoing and other obiects in view which will appear as the description proceeds, the invention consists in certain features of novelty in the construction, combination and arrangement of parts by which the said objects are attained, the invention being more particularly pointed out in the claims. r

In the accompanying drawings: 1

Figure 1 is a front elevation, mostly in section on line i-l of Figure 2, of a valve structure embodying my invention and showing the valve in a closed position.

Fig. 2 is a side elevation of my device showing the outside valve operating mechanism in a closed position asinFig.l.- Fig. 3 is a sectional view: of a portion of the device as in Fig. 1 but with the valve in an open position. 1 Fig. 4 is a front elevation of my devicewit h a modified operating handle in a closed position. Fig. 5 is a side elevation as in Fig. 4* with the handle in full for the closed position and dotted to show the open position. i

Figs. 6 and 7 are front and side elevation of the upper portions of a valve structure embodying another modification for the .valvecontrol.

Fig. 8 is asection on line H of Fig.- 6. Fig. 9 is a front elevation, mostly in section or line 9-! of Fig. 13, of a valve structure as in Fig l but with a modified valve control from that 0.

Figs. 6, 7 and 8, and showing the valve in a closed position.

Fig. 10 is a view as in Fig. 9 but'with the valve in an open position and showing a cover for the operating stem.

Fig. 11 is an outside front elevation-of the upper portion as in Fig. 9. l,

Fig. 12 is an outside front elevation of theupper portion as in Fig. 10 but withoutcover.

Fig. 13 is a side elevation of F18."11.

Referring to Figs. 1. 2 and-,3, the lower-end of body i i -threaded at 2 for connection to a cdntainer and has an axial inlet passage 3 extending up into a valve chamber all laterally extending boss 5 having a passagelcommunieating with passage I, provides means for accommodating a safety disk I whichis held in Place by a threaded cap I. a v. a

Any abnormal pressure developed in. the tank will rupture the disk I and allow the fluidto escape through passages O in the cap! in the usual manner. r

Communicating with thevalve'chamber .l is a discharge passage III in another laterally extending boss ii which canbe threaded as shown, or otherwise arranged for connecting to the other parts of a ilre extin uishing apparatus.

The opening and closing of passage liscontrolled by a valve it which has .as'uitable sealing insert it on its lower end to cooperate with the annular valve seat It. Insert i3 is fastened to valve It by means of theqthreaded thimble i5. Valve l2 has a stem It on the upper end of which is fastened a nut H by meansofithreads. The

'upper end of chamber 4 is closed by a threaded plug it with a stepped central bores- The lower and smaller part of said bore forms a guide for the valve stem it while the upper and larger part of said bore forms a guide (or said nut i1 and a pocket below said nut for a compression valve spring I! around the valve stem it. Acting against the lower shoulder oi nut I! the sin-ins it operates to raise valve II from its seat II as will later appear.

A bonnet II is threaded at II to cover and form a connection with the upper end body I and to inclose and conflne a suitable metal diaphragm fl the rim oi which seals the Joint betweensaidbonnet and body and. the center 01' which rests on the-top of nut il. Centrally in line with nut I1 and contacting with the top center of diaphragm i1 is head 24 oi the screw ll, said sore .a being carried in a crosshead II which has ding contact within the cylindrical chamber 18 o! the bonnet :0. Screw 23 'is threaded at 21 through the crosshead II and has a cylindrical portion II which is adap d to slide in. and be guided by, the top wall of bonnet ll. 7

Above the cylindrical portion 28 oi screw 28 is [a thread ll toengage the nut II for locking the screw llirom turning when the crosshead I! is held at the lower end oi its travel by the toggle joints to be described. and the valve i! is closed on its seat II. II is a hand wheel fastened to screw" by a nut 32 for operating said screw.

fastened into opposite sidu o! the crosshead II are two pins 83, 83 which are adapted to extend through and slide in vertical slots ll. 34

in thebonnet 20. 'II is the handle of a Y-shaped lever twoarms SI. II. Each arm 31 is pivoted'at its end .to a pin II and intermediate oiits length is pivoted to a pin ll on one end of a. opposite end oi um: as is pivoted to the body l by the pivot ll, and said link I! and arm IHorm atosgle joint to hold crosshead 2 at the bottom of its travel as shown in Fig. 1. when said croahead 2! is-at the bottom of its travel as in Fig. lthe handle as or lever st rests liainst the body I as in Fig. 2 and is-held there s dead in the usual manner. The breakp "sealoccurs tvhen' the wire isbroken crneatcdsumc enu to inelt n.

top I! of chamber 2! forms a stop for the at unsound crosshead lest the top or itstravel as in m: a and handle an then in arr showninFis. 2.

'6! the valve is as iollows: A

container or cylinder (not shown) is loaded with CO: and the valve body I screwed into laid convtailie'i'. I ll cloeedagainst body I as in l 2 which bllnlil crossliead H to the tineai-aisesthepressureinsaidcontainertoaar' 100 or 800 pounds per square inch. Under con- Piss ditions which -abnormally raise this pressure to said Figs.

an unsafe point the safety disk I will be ruptured to allow the fluid in the container to escape through passages 8, 6 and 9. To open the valve II the lever It is pulled away from body I to break the seal it and as soon as the locking etiect oi the toggle joint is released by the line H crossing center 42 the valve spring i8, assisted by the container pressure, iorces valve i! to a full open position as in Fig. 3 and lever 36 then assumes dotted position iii as in Fig. 2. Passages! and ID are thus fully opened immediately (Fig. 3) allowing the fluid to flow freely from the container.

In case it is desired to stop the fluid flow and preserve an unused portion in the container the hand wheel II is operated to thread screw ll through c'rosshead 25 while said crosshead is in its upper position as in Fig. 3, thus flexing diaphragm 22 and closing valve if! on seat It against the tank and valve spring pressures to the position shown in Fig. 1.

Theinternal parts or the valve structure shown inFlgs.4and6arethesameasinFigs.l, 2and 8 but the lever 38 is controlled in a diiierent manner from that in Figs. 1 and 2, i. e., the lever pin a on each lever arm I! is providedwith a roller II which is adapted to iollow the contour ll of lug it during the movement of the lever 30 to dotted position 38'. The lug 4! on bonnet II has a lower surface it {or holding lever II in a closed position by means of roller 41 and locking crosshead ii in its lower position (Fig. 1).

A spring ll surrounding pin II and fastened intozbody I is held in a compressed position by lever II in its closed position and locked by the seal ll. The spring liv provides an automatic means ior'operating the lever 38 by iorcins said lever away irom its locked position against body I when a ilre breaksthe seal 45 by raising the temperature to its melting point. The valve i2 is then opened by its spring ID as before explained in reference to Figs. -1', 2 and 8.

A modified method of locking and releasing the cr'osshead 25 of Fig. l is shown in Figs. 6, '1 and 8 and consists of a sleeve I! mounted on bonnet II and having a limitedv rotating movement thereon. Sleeve 52 is guided and limited in its rotating movement by two oppositely disposed pins .68, SI threaded into bonnet 2. and extending through horizontal slots It, ll insaid sleeves. On the quarters between screws ll, II are two crosshead pins 33, 83 which extend through the vertical slots 84. I4 in bonnet ll and the compound slots 8 in sleeve 8!. The compound slots 6 insleeve I! have two component parts, a horisontal part ii ior locking the crosshead, II in its lowest position and a diagonal part I! in which said pins ll, travel when sleeve-H is partly rotated by means or its handle; ll.

In the position shown in Figs. 8,1 and it the crosshead II is locked in its iowestposition as in 1 by the pins as, u in no'rizontaisiotsn.

it. Rotating sleeve 5! in the direci lbnor. arrow "by means oi handle in unlocks marm- 1 3,. and allows themto rise in diagonal notices: in sleeve It and in vertical slots at. u in bonnet II when the crosshead It moves i'rom its lower position as mm. 1 to itsunwposition as; in Fig. 3 under action of valve spring II in opening valve II.

The main parts oi the valve structure shown in to .13 l'e similar to those shownin the above description applies to to 13. The latter however has some but with an operating sleeve as in.

- er is so small, and it can only be efiective when starting full, the container should be entirely discharged, necessitating refilling, when once the valve is opened tor use.

In Figs. 9 to 13, the sleeve I2 is mounted on bonnet 20 to be guided between a shoulder II and a bonnet nut BI and is adapted to be partiallly rotated by trigger ll acting on a pin it which is fastened to said sleeve. Trigger ii is pivoted to bonnet II by a pin OI and held in its operative position against a stop II by a spring llasinFig.l1. llgatllandlSoHMthe position oi sleeve 5! when the 20 is in its lowest position to close valve 82 as in'l 'lg. l andlockedlnthispositionbythserossheadpins ll. bearing against the horizontal slotsllas in Fig. 13. When trigger it is moved by the finger" from its position in Fig. 11 to the dottedposition,

ii in Fig. 12, the sleeve pin II moves to position I (Fig. 12) and in so doing moves sleeve 62 in the direction of arrow ll (Fig. 13) to unlock pins II from the horizontal slots ll and allow said pins II to rise in diagonal slots ll oi sleeve l2 and in the vertical slots ll oi bonnet 20. The crosshead 26 then moves from its lower position in Fig. 0 to its upper position in Fig. under action oi valve spring il in opening valve II. Releasing trigger li' it returns to its normal stop position Ii in Fig. 12.

Crossheadscrewllinl'igailandlllisprovided with a socket opening I for a socket wrench in place or a hand wheel and the end oiscrewfliscoveredbyacapflandaseal to prevent tampering with and closing valve II Irom its position in Fig. 10. by manipulating screw II, beiore the container contents is completely discharged which takes only a matter' oi seconds. The screw It is locked from turning by nut II when the valve is seated to prevent leakage or turning except as intended. It will be understood-that any elements can be used without reference to sizes mentioned.

InFigs.8,7,8, i2and l3oneendofpinll is fastened into bonnet ll and has a suitable shape as shown for holding coil spring ll. One end of spring II is fixed to sleeve 52 and held in a compressed position on pin 43 by seal II when the valve i2 is closed. Seal II is broken to release valve i2 and this can be done manually. or when suitably mounted for fire protection, the spring and seal furnish automatic means for releasing said valve when a fire breaks the seal as before explained.

I am aware or the valves of Forbes, No. 1,890,- 505, Dec. 13, 1932, for replacing a diaphragm: of Minor, Re. 19,087, Feb. 20, 1834, for resiliently looking a valve; and of lhillips, No. 1,996,489, for releasing contents of pressure containers: and the present invention is to provide improved and practical means for a quick opening valve.

Having thus described my invention, I claim:

1. In a device of the character described. comprising a valve body having a discharge passage. a valve seat within a valve chamber. a valve in said chamber for said valve seat and having a stem, a spring to raise said valve from its seat, a diaphragm in contact with said valve stem. a bonnet sealing said diaphragm in said body and having a chamber. a reciprocating crosshead guided in said bonnet chambenffarl operating stem movable in line with said valve stem to close said valve on its seat and located on the opposite side of said diaphragm from said valve stem. said operating. stem carried by said crosshead, means iastened into said crosshead and extending through said bonnet to travel with and hold said therebe'tween, a stembperating in line with said or in a fixed position when said operating stem is holding said valve closed on its seat. means to lock-said crosshead in said fixed position and means to lock said operating stem.

2. In a device of the character described. the combination asin claim 1 and means to automatically release said cmsshead locking means toopensaidvalve. 1

3. In a valve device or the type in which the valve is inclosed in thevalve by a sealing diaphragm, comprising a" having a valve chamber with inlet and discharge ands valve seat. a valve to mopeiflite with said valve seat, a stemior said v'alve, a 'valve spring to raise said valve iro'm its seat, a bonnet having a chamber. a diaphragm clamped at its rim between said bcdy'and bonnet to seal the "Joint valvea reciprocating crosshead'in said bonnet and threaded said operating stem, horizontally disposed pins connected to said crosshead through said bonnet to slide in slots in said bonnet, means to move said crosshead by said pins, means to lock said moving means and spring means to release said moving means.

4.Avalvedeviceasinclaim8andasealto hold said spring means in an operative position. 5. A valve device of the type in which the valve is inclosed in the valve body by a sealing diaphragm with valve operating mechanism outside of said diaphragm, comprising a valve body having a valve chamber with inlet and discharge passages and a valve seat. a valve in said chamber, a stem for said valve, means to guide said valve stem. a valve spring. a bonnet having a chamber, a diaphragm clamped at its rim be-- tween said body and bonnet to seal the joint therebetween. valve operating means. said operating means consisting oi a crosshead to reciprocafe in said bonnet chamber, an operating stem threaded through said crosshead to fiex said diaphragm and slide through the top or said bonnet, pins iastened into said crosshead and extending through slots in said bonnet to move said crosshead in line with said valve stem, a sleeve having a rotstive moment about said bonnet and operstivelyconneciedtosaidorossheadpimby compound slots. said compound slots having a diagonal part and a substantially horizontal part, said horizontal slot part serving to lock said crosshead in its lowest position by means or said pins.

6.Avalvedeviceasinclalm5andacoverto prevent operation of said operating stem when said valve is open for discharge. 'l'. In a valve device of the type in which the valve is inclowd in the valve body by a sealing diaphragm with valve operating mechanism outside of said diaphragm. comprising a valve body having a valve chamber, a valve having a stem. 8 spring for opening said valve. a diaphragm for sealing said valve and stem in said body. a bonnet having a chamber. a diaphragm clamped between said body and bonnet, valve operating means, said operating means including a reciprocating crosshead, an operating stem carried by said type with valve operating mechanism outside of said diaphragm, comprising a valve body. a valve in said body, a diaphragm to seal said valve in said body. a bonnet on said body. valve operatin means outside at said diaphragm, said valve operating means consisting of a enosshead, an oper- V sting stem threaded through said crossliead i'or flexing said diaphragm, pins to move said crosshead iromivithnnt said bonnet. a sleeve mounted on saidbonnet for rotative movement, diagonal slots in said sleeve for operating said crosshead toward and away from said valve by said sleeve rotative movement. said slots having a substantially horizontal part for locking said croashead and operating stem to hold said valve on its seat in a closed position and pivoted lever means to rotate said sleeve to unlock said crosshead and release said valve.

9. In a valve device of the diaphragm sealing typ said device including a valve body, a valve in said body, resilient means for opening said valve. a diaphragm to seal said valve in said body, a bonnet on said body, a crosshead to reciprocate in said bonnet, an operating stem adiustable through said orosshead to claw said valve by flexing said diaphragm, pins in said crosshead extending through vertical slots in said bonnet, a rotative sleeve mounted on said body. diagonal slots in said sleeve for reciprocating said erosshead. said slots having a substantially horizontal part for looking said crosshead pins to hold said valve in a closed position, a lever pivoted to said bonnet and having a slottedend tor rotating said-sleeve to release said crosshead bins from locked position anda spring to return said lever to its operative position. V f

10in vaive-device as in claim 9 and spring means connected to said bonnet to said sleeve and a sealto' hold said spring!!! a compressed said spring means" operating said sleeve to release said pins from locked position independently of said lever.

GEORGE SCHAAI".

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