US2280309A

US2280309A - Valve device

Info

Publication number: US2280309A
Application number: US364064A
Authority: US
Inventors: Frank O Graham
Original assignee: Temprite Products Corp
Current assignee: Temprite Products Corp
Priority date: 1940-11-02
Filing date: 1940-11-02
Publication date: 1942-04-21
Anticipated expiration: 1959-04-21

Description

April l21, 1942. F. 16k/4mv 2,280,309'- VALVE DEVICE Filed Nov. 2, 1940 2 Sheets-Sheet l /A/Kewrae.-

April 21, 1942. l F. o. GRAHAM 2,280,309 1 VALVE DEVICE l Filed Nov. 2,' 1940 2 sheets-sheet 2 ffmuumfui; m

Afro/mfr facture and' insure ESs ` f DEVICE `Frank ,GrahanLf Detroit; assigner to Temprite Products Corporation, Detroit, lVIicli.,

a corporation of Michigan Application'November 2,1 I loiciamsn This `:invention relates: to valve ydevices ifor` conf trolling the flow of fluids andfrparticularly to suchf valve devices which are adapted' tojbe opened manually and tot close automatically'under-they iniluence of the iiuidA pressure passage ofthedevice. f i I The invention has for'one of'its objectsthe" provisionl of Va valve device in `which the controlv in the discharge of the iluid now is effected `by a main `valve and an auxiliary valve-Which variablyithrottlesxthef automatically to limit themaXimurn-discharge pressure of the device.`

Another object of the invention ;is` to provid means wherebyzmovementof the throttlirig `valve p servesl automatically to initiate the closingmovel-'f `ment of the main valve. f i

A further object of the invention `is tofpdvide a valve deviceof the character intfquestion'kin: which the maximum iluid flow capacity -ofwthe device is subject to variationby'manualicadjuste `ing means; y f' ,f1 I.

Another object of the `.invention is to provide.'

a" valve device of 'theAV character irrqueistionT lin 1' which the `automatic lclosing `ofy the'main valveim'k `is subject to the intervention of manual 'means C10"Se` by which the main `valve can be made :to at any timejtofstop the iluid flow." w f Another object 0f the invention isto'^ a valve of the :character in` question inl-Which? the design, both of the individual partsfandl ofthe entire assembly, `is` such` as to facilitatefmanudevice. l

of the invention which follows. i I t The invention, `with the `various objects in view, consists ini certainifeatures of:` construction n and combinations of parts hereinafter setforth,`

in connection with the' accompanying drawings oi a preferredl embodiment offtlne invention-itl n. y n i. Y Mt. l b 4: v being understood that the mven ion can e em L 4l n is btedmwith a packing. gland l 9 which sup of specific -forms vof fooninlet conduit of thestora'geftank., .f

`provide i reliable operationy ot thei ery -truck and being detacliablyf connected to f 2, 1940; Serial No'. 364,064

Fig.` 2is a( centralyvertical sectional View lof the valve device;y i I Fig. 3 is a plan view of thefdevi'ce Y. j ReferringA .in detail to the construction illusqtratedgl designates the improved valve `device in its entiretyp indicates a sectionof the flexible hose* line y.vhicliis connected at one end tothe inlet of. thevalvev device I and vvliich'is` adapted to be connected with theoutlet of a tank of a- 10.7; delivery Atruclssuch as is usejdin delivering fuel oil to the premises of the consumer. -3 is an inlet pipel of a storage tank 4- which" may be in thebasement of abuild-ing or lburied in the ground. The pipe `3 isfltted at its dischargewend withia 11455.;floateccntrolledwvalve 5 which operates to `stopu thefflow through pipe? 3 when lthe liquid level in. thetank risesy to a predeterminedfmaximum.. rEhe-tank 4 isrttedgwitha vent pipe 6 through"` Which-Hair and vapor in the tank can escape,` mlglduring the llingoffthetanlc. y I i Considering thevalvefdevice Iasshof\vn in Figs;- 2 and 3,1thecasingr'l oflthefdevice hasfaninlet-opening 'I` to which` the fhose pipe 2 is shown-- connected-lullig: 1i. y'Illnis. inlet 1icommunicates` .with austraight sectionil. of the fluid passage through4 the casing and;4 said: sections in turn `intersects and #communicates wwith aV straight sectionf 9 of said passage.` L I ..i y An annular; valve seat member I0 is pressed 35% into!` passage sectionY llfanda cup` shapedv valveIk member II `is slidably-m-ounted in the bore cfa passage section 8. to cooperate with the seat I0. 'Ilhe-Ivalvefmember II `has its face apertured to- `receive a tubular valvel seat member I2 which liisA secured to valve II bymeans ofrnut I3 and` '"seives 'also to secure tothe facerh ofthe valve a suitable packingY i4. A pilot valve I5 is arrangedl to` cooperate lWitl'1-tlfie"seat I2, said pilot valve beingnfast ona rod or'spindlel I6 which extends `4Q, through; the valveI seat `I2 `and is slidably supl portedmat its outer end in a closure Ilwhich is threaded into the end of passage section 8 and,` iniconnectionwith agasket I8, tightly closes the outerend of said passage section `8. The closure 'rounds the `spindle I6 and prevents leakage of liquidalong said spindle.: The inner end of the spindle I6 is guided in a spider, 201which `is` clamped betvveena shoulder oft thefcasing Ia on the valve AI5.n VAdjacentthe face of the valvef 55 l I I the spindle A VI6 is .iittedmfithi a` transverse-pin 23 which is adapted to engage the face of valve I I and move it in an opening direction when the spindle I6 is pulled out, said spindle being fitted with a knob I6a for that purpose. The side wall of valve II has an aperture IIEL for a purpose which will later appear.

When the valve I I is opened manually by pulling out the spindle I6 it is held in open position by the automatically-operating latch 24 which is in the form of a lever pivotally supported on the guide spider 20 in position to engage a circumferential shoulder I6ID of the spindle I6. One

end of the latch lever 24 is yieldingly pressedY against the spindle I6 by means of the tension spring 25 which has one of its ends attached tov latch lever 24 and its other end secured to an anchor disk 26 disposed in a passage formed through the Wall of casing Ia, this passagebeing sealed by a threaded plug 21. With this arrangement the latch 24 is automatically snapped into engagement with the said shoulder IIb when the spindle I6 is moved outward.

In the section 9 of the valve passageway is arranged a sleeve valve which is designated as an entirety bythe numeral 28 and which comprises a tubular member 28a and a disk 28b which closes the upper end of member 28a. The upper part of valve 28 slidably engages a sleeve 29 which is pressed into the bore of section 9 of the passageway while the lower part of valve 28 slidably engages the wall of the casing IEL directly. Slot-like apertures 28c are formed in the side wall of valve 28 to cooperate with similar apertures 29a in the sleeve 29. In its normal position as shown in'Fig. 2 the

slots

28a and 29a are in full registration with each other to' afford a comparatively free passage for uid from the section 8 of the passageway to section 9 thereof. The valve 28 also has one or more restricted drain openings 28d which are open at all times.

A tubular metallic bellows member 38 is hermetically joined at its lower end Vto the upper end of valve 28 and is similarly connected at its upper end to a ring 3| which engages a top aperture of the casing Ia with an intervening gasket 32 against which it is clamped by a screw cap 33. The valve 28 is tted with an upwardlyextending spindle 34 which slidably engages a centralvaperture in the cap 33 and has its upper end threaded to receive a knob 35 which can be adjusted upward or downward von the spindle 34 and which isoperatively secured to the spindle by means of a cap screw 36. The lower end of the knob member 35 engages the top of the cap 33 so that when the knob is turned in a clockwise direction valve 28 is drawn upward in casing Ia against the spring tension of the bellows 30. When theV knob 35 is turned in a counter-clockwise direction, the resilient bellows 3!) forces valve 28 downward as far as the engagement of the lower end of the knob 35 with the cap 33 will permit. In the lowermost position of valve 28, with its slot-like apertures 28c fully open as shown in Fig. 2, the top of cap screw 36 is ush with the top `of `knob 35 and when, by clockwise` adjustment of knob 35, the valve 28l is adjusted upward the amount of the latter adjustment is indicated by the distance the cap screw 36 extends above the top of knob 35. Such upward adjustment of valve 28 isA limited by the engagement of a shoulder 34,a on spindle 34 with the lower end of knob 35. vTo avoid hydraulic resistance to the movement of valve 28, the sidewallthereof is formed with anV aperture 28e to afford communication be- 20 from shoulder IIi1D of the spindle I6.

the vent pipe 6.

7b lsion of bellows 30.

tween the interior of the valve and the space surrounding the bellows 30.

It will be seen that the valve 28 can be adjusted manually upward and downward by means of knob 35 to vary the effective capacity of the passageway through the valve device. In addition, valve 28 is subjected to the unbalanced upward pressure of uid in the section 9 of the passage through the casing and if this pressure becomes strong enough to overcome the spring tension of the bellows 30 valve 28 is thereby moved or adjusted upward by the uid pressure.

vTo effect the automatic closure of the main valve II the throttle valve 28 has its side wall formed with a circumferential groove 28f disposed so that the lower side of the groove will engage theV adjacent end of latch 24 when valve 28 moves upward and thus disengage the latch 24 When this occurs. the pressure of spring 2I moves pilot valve I5 against its seat carried by valve II and thus forces the latter valve toward its seat, a

steady movement of the valve II in the closing direction being permitted by the flow of liquid 352' in the form of a metallic strap which is secured at its two ends to the casing Ia by means of

screws

39, 39.

In the use of my improved valve device in connection with the discharge of fuel oil from 40'3a delivery truck into a storage tank, the pro- -cedure is as follows. The valve device being attached to the flexible hose pipe 2 of the truck, when the latter moves into position adjacent the delivery tank the valve device is readily attached to the inlet pipe 3 by means of the threaded 'cou'- pling 31. This connection having been in'ade, the operator opens the valve II by pulling outward the spindle I 6. The first part of this movement opens the relief valve I5 so that liquid '05 on the interior of valve I I can flow freely past the relief valve seat I2 and the continued out` ward movement of spindle I6 causes the pin 23 to engage the face of the valve IIV and move the valve to its fully open position against the' tension of spring 2I. When the valve II reaches its fully open position, latch 24 automatically engages the shoulder I6b on the spindle I6 andv holds the valve open.

The liquid is then free to flow from thetank on the delivery truck through the hose pipe 2,

valve I and inlet pipe 3 into the storage tank 4, the oat valve 5 of the tank being'open. As the level of the liquid rises in tank 4 air and any vapor present in the tank escape through If this vent pipe is of ample capacity and unobstructed, practically no pressure will be built up in the storage tank 4 and the throttle valve 28 of the valve device I will d be held in its open position by the spring ten- In the event of accidental obstruction of vent pipe 6 more or less pressure will build up in the storage tank 4 as oil enters it and there will be` a resultant lback pressure in the discharge passage 9 of the valve device.

7 5 If this back pressure exceeds the moderate spring move throttle the. owf'ofzliquid to a point where the discharge. of liquidinto theA tank 4' corresponds to ftherate fofflow of air throughlthe relief pipeL 6. Consequentlyit is impossible for.` any danger-` ous pressures to be ,built up in the storage tank 4 asa result of obstruction of the vent pipe. il

Whenthe liquid in the tank 4 rises to the level `oi" the'ifloa't of valve 5" the float is1v lifted;

to gradually closelvalve and correspondingly throttlejfjth'e"liquidlrflow: l 'Ihis results vin the formation of back `pressure in pipe 3 and the discharge section! of valvel. This in turn causes an upward, closing movement `of valve 28 and when the valve has `moved alittle past the position in which its slots"28areclosed itactuates the latch 24 to disengage the latter fromfthe shoulder `Iib and permit the closure ofthe main valve "IL Upon disengagement of the latch, spring 2I iirst forces the relief valve l5 against itsseat |2andthen forces themain valve Il toward itsseat I0. Theclosing movement of the valve H is eiected withoutfshockbecause the inflow" of liquid to the interior of the valveiis restricted' bythe small size of the aperture Ila.

As soon` as the main valve Ill has closed, couplingl3'l may be loosened to permit ingress of airl and the draining lof liquidin the outlet passage 9 of valve I and inlet pipe 3 past the incompletel-y closed valve v5 and into storage tank 4. WithV the reduction of pressure in the dischargepassagef 9 oflvalve l, when main valve Il closes, theva'lve' 28 is `moved to its open position and liquid on the discharge side of valve Il is adequately drainedthrough slots 28c and apertures 28@l and 28e of valve 28.

If atany time during the discharge of liquid through the valve `device it is desired to stop l the flow of liquid, this can be accomplished by the attendant by simply pulling upward on the knob 35 to disengage the latch 24 of main valve II.

Also, to `meet various operating conditions, the attendant can readily vary the maximum iiow capacity of the valve device by rotation of the knob 35 in one direction or the otherlto increase or decrease therate of iiow through the valve passages 28c and 29a. l

By arranging the inlet section 8 and the outlet section 9 of the valve passage at an angle to each other, a casing structure is formed which both facilitates the assembly of the main and throttle valves` and makes possible the use of structural parts of a relatively simple and rugged characteradapted to operate reliably in the use ofthe device. e

While the` construction ofe-the valve `device which I have shown and described is such as I now prefer', it is to be understood that the apparatus can `be modified in various` ways without departing from the invention as defined in the appended claims.

What I claim is: `,1.Inra valvedevice, the combination of a casing having a passage therethrough for the flow of fluid, a valve seat in the said passage, a 'valve associated with the seat and movable toward and from said seat to control the flow of uid through the passage, a spring for pressing the valve against the seat, manual means for opening the valve against the pressure of said l spring, a latch device operating automatically to hold the valve in open position, means actuated by fluid pressure in the discharge part of the actuated meanslftowefl'ect disengagement ofthe y latchi device. l Y im2.v Ina'valve device,` the combination of a casingh-aving apassage therethroughfor the flowA of uid, `a valve seat in the said passage, main valve associated with the seat and `movable toward andl fromI said seat to control the now of iiuid` through the passage, va `spring for pressing the valve fagainst the seat', manual means for openingjv the valve `against the pressurelof said spring,"`a `-lateh dev-ice operating automatically to-holdthe valveinopen position, a spring-biased valve" operatively arranged in the casing on the outlet side ofthe main valve Vto throttle flow of uid through thecrasing passage, said `springbiased valve being' normally open and operable bythe fluid discharge pressure of the device to said valve inthe closing direction disengages the latch device.

3l. A valvedevice as claimed in claim 2 in which the operative connection between the latch and thejsaid? spring-biased valve acts todisengage the latch after the spring-biased valve has moved past its closed position.

4; AIn` a valve device, the combination of a casing having'a passage therethrough for the iiow of iiuid, a valve seat in the said passage, a main valve associatedwith the seat and movable toward and "from said seatto control the flower-of fluid' through the passage, a`-v springV for pressing the valve against the seat, manual means for opening `the valve against the pressure of said spring,

a latch device operating automatically to hold the valve in open position, a spring-biased valve operatively arranged in the casing on the outlet side of the main valve to throttle ow of fluid through the casing passage, said spring-biased valve being normally open and operable by the iiuid discharge pressure of the device to move toward closed position against the pressure of its spring as said discharge pressure rises, van operative connection between the latch and the said spring-biased valve whereby movement of said valve in the closing direction disengages the latch device, and means operable manually to move `the spring-biased valve in its closing direction to effect disengagement of the latch device.

5. In a-valve device, the combination of a casing having a passage therethrough for theflow of fluid, a valve seat for said passage between the inlet and outlet thereof, a valve associated with the said seat to control flow of fluid therethrough, manual means for opening said valve, means for holding the valve in an open position, means in the passage on the outlet side of the said valve operable by the fluid pressure in the` f discharge part of the said passage to throttleV with the said seat and vadapted to control flow therethrough, manual means for opening said valve, means for holding the valve in an open position, means in the passage on the outlet side of the saidvalve operable by the fluid pressure in the discharge part of the said passage to throttle the flow through the passage as the said pressure rises, and means for releasing the valve-holding means when the throttling means has reduced the effective capacit-y of the passage to a predetermined point.

7. A valve device as claimed in claim 6 in which the means for throttling vthe flow ofV uid is adjustable to vary themaximum cross sectional capacity of the fluid passageway of the device.

8. In a valve device, the combination of a casing having a passage therethrough for the flow of uid, a valve seat for said passage between the inlet and outlet ends thereof, -a main valve associated with the seat and arranged to close with the ow of fluid through the passage, said valve being constructed and arranged to form in conjunction with the casing a pressure chamber on the inlet side of the valve having a restricted communication with the inlet portion of the said passage and the said valve having a passage therethrough, a pilot valve controlling the passage through the main valve, manually operable means for opening the said pilot valve to eiTect communication between the pressure chamber and the outlet portion of the main passage of the device and thereafter moving' the main valve to open position, a latch operating automatically to hold the main valve in open position, and means actuated by fluid pressure on the outlet side of the main valve for disengaging the latch.

9. In a valve device, the combination of a casing having a passage therethrough for the flow of iiuid, a valve seat for said passage between the inlet outlet ends thereof, a main valve associ-ated'with the seat and arranged to close with the flow of fluid through thepassage, said valve being constructed and arranged to form in conjunction with the casing a pressure chamber on the inlet side of the valve having a restricted communication with the inlet portion of the said passage and the said valve having a passage therethrough, a pilot valve controlling the passage through the main valve, spring means for pressing the pilot and main valves against their seats, manual means for successively moving the pilot and main valves off their seats, latch means operating automatically to hold the main valve in open position, and means operable by fluid discharge pressure of the valve device for disengaging the said latch means.

10. In a valve device, the combination of a casing having a passage therethrough for the'flow of uid and comprising two mutually intersecting sections, a valve seat in one of said passage sections, a main valve in said section cooperating with said seat and` biased for movement against the seat to stop flow of fluid therethrough,y manual means for opening the valve, a latch device operating automatically to hold the valve in open position, a spring-biased throttling valve disposed in the other said section of the casing passage, the latter valve being normally open and movable by the iiuid pressure in the discharge part of the casing passage to move it in a closing direction, and an operative connection between the last named valve and the said latch whereby the latch is disengaged by the closing movement of the valve. f

FRANK O. GRAHAM.