US1468434A - Valve device - Google Patents

Description

Sem., 118 s, 1923, Mgfi@ J. ZANDER VALVE DEVICE Filced April 6; 1923.

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Patented Sept. A18, 1923.

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TOEN ZANDER, 0F CHICAGO, ILLINOIS.

vALvE Application ined April 6,

invented a new anduseful Improvement inA Valve Devices, of which the following is a My invention relates more particularly to valve devices adapted for use more especially as fluid pressure controllers for insuring the uniform 'flow of Huid pressure to its point of use from a source of fluid pressure regardless of variations in pressure of the iiuid at thesource, variations in back-pressure, or both.'

:I have devised my invention for use more especially, though not to the exclusion of such other uses to which it may be put, in connection with artificial refrigerating sys tems wherein a' refrigei'ating agent such as ammonia is employed and involves for performing the refrigerating function the expansion of liquefied refrigerant into `aI gaseous condition and for such functioning employs a so-called expansion Valve in which my invention maybe embodied and used to great advantage. y y primary. object is to provide valve mechanism' especially tov constitute the expansion .valve of such a system, which shall operate accurately and effect uniform flow of Huid pressure, regardless of variations in the pressure of the supply, back-pressure where it exists, .or both, and which shall not be liable to impairment; and other objects as will be manifest from the following description. i

Referring to the accompanying drawings, Figure lis a view in sectional elevation of valve mechanism, shown as of the eiipansion type referred to, and constructed in accordance with my invention; and Fig. 2, a section takenat the line 2 2 of Fig. l and viewed in the directioniof the arrows, onehalf of the diaphragm of the device being omitted.

The device according to t-he preferred illustrated embodiment of my invention, is

formed of a casing represented at 4 and preferably-provided in sections represented at 5 and 6, these sections fitting flatwise together at disk portions 7 and 8 respectively' 'thereof at which they are secured together as through the medium of bolts 9 passing its marginal edges between the nevica.

1921. "Serial N'o. 458,943.

through themarginal edges of these disks.

The opposed surfaces of the disks 7 and 8 are recessed as represented at Jl0 and 11 and extending across the space provided by these recesses, is a flexible diaphragm of any suitable material and represented at 12, this diaphragm being clamped by the bolts 9 at annular portipns of the disks 7 and 8 surrounding. the recesses 10 and 11, the diaphragm 12 coni taining a centrally disposed opening 13 which forms the` sole means of communication between the chambers afforded by the recesses 10 and 11 and which cooperates with a valve represented at 15. The valve referred to is formedwith a conical portion 16 concentrically disposed relative to the opening 13 and carried on the lower end of a stem 17 which has screw-threaded connection at a threaded portion 18 with an opening 19 inthe section 6, the upper end of the stem 17 cooperating with a stufiing-box 2O and carrying a pointer 21 which turns with the valve and which may, in practice cooperate with indications (not shown) on -a dial member 22 carried by the upper end of the casing section 6. As hereinafter described, the adjustment of the stem 17 length'- wise, by turning it in the section 6, controls the rate of flow through the outlet of the casing, and the vdial 22 may present such matter thereon, for cooperation with the pointer, as to indicate the position to which the stem 17 is turned foreifectingthe desired rate of flow through4 the outlet.

The inlet of the valve device is represented at 23 and opens into the space provided by therecess 11, the outlet of the device being represented at 24, this outlet communicating with a relatively small passage 25 in a plug,

426 screwed into the outlet 24. The passage 25 opens into a socket 27 in the plug 26 and open at its top, this socket communicating at a port 28 in the wall of the plug` with .the reduced portion 29 of the recess 10. The

through the inlet 23 operates against. the

12, under the action of a coiled spring 36 surrounding the plug 26 and confined'between an annular shoulder 37 provided by the section 5, and tlie bottom of the disk 33.

In the normal position offfthe parts of the valve device, namely, when no fluid pressure is being supplied thereto, the valve 31 will extend out of engagement with the seat 30.

The flow of liuid pressure to the device uppervside of the diaphragm 12 with the result of flexing the latter, in opposition to the spring 36, in a direction to move the diaphragm 1 2 away from the valve 15, and consequently permit `fluid pressure to flow` .through theopening 13 and into 'the space provided between the disk 33 and the diaphragm 12 thence out through the holes 35 into the recess 10 from which it passes through the port 28 into the socket 27. -Thus operating the diaphragm causes the valve 31 to be forced'to closed position, andthe liuid -pressure continues to iiow into the recess 1 until the pressure existing in this recess is suiiicier t, in vcombination with thepressurc produced by the spring 36 ifn tending to expand, to equalize the pressure of the incoming fluid exerted against the upper side of the diaphragm 12. The valve 3L thus becomes unseatcd and permits of the tlow of fluid pressure-from the recess 10 tp and through the outlet 2 4. The drop in pressure of the fluid thereby produced in the recess 10 by the opening of the valve 31 permits the iiuid 1n entering the recess 11 to force4 the diaphragm 12 downwardly and supply more fluid to the recess 10 and as the pressure increases in the recess 10 as hei-einbefore stated, the diaphragm 12 moves back toward normal position. lt will thus be understood from the foregoing that the differential pressure at opposite sides of the diaphragm 'being a constant and the opening therethrough also a constant, a uniform rate of iiow of the fluid through opening 13 and also the outlet 24 will be maintained regardless of variations in the pressure of the Huid supplied to the device through the inlet 23, back-pressure at`the outlet 24. or a combination of both. The rate of dow y through the device may be varied either by tid varying the tension of the spring 3G, or, and as the device is shown preferably, by adjusting the valve 15 toward and away from the diaphragm 12, or by a combination of these adjustments, it being understood that the closer the valve 15 is adjusted toward the diaphragm 12, thc less the rate of llow through the outlet 24. By the adjustments referred to the constant of differential pressure of the fluid at opposite sides of the diaphragm 12 may be varied as desired. and lby adjusting the valve 18 the constant of the opening aorded through the diaphragm -valve 32 which is positively guided and enf gages at all times at the disk portion 33 with the diaphragm 12, is of advantage as thereby distortion of the diaphragm 12 which might otherwise occur is prevented.

Vhere the valve shown is used in a refrigerating system of the intermittent absorption type wherein the gasified refrigerant is placed in solution and from which it is boiled off in any one part of the cycle of operations, an effect which causes a reverse llow of fluid tothe valve would be produced, the valve operates automatically as a check to prevent the flow of the fluid through thel valve dei/ice.

While I haveillustrated and described a' also be varied as desired, thereby to particular construction embodying my invention, I do not wish to be understood as intending to limit it thereto as the same may be variously modified and altered without departing from the spirit of my invention.

'What ll claim as new and desire to secure by Letters Patent'is: y

1. A valve mechanism comprising a casing containing an inlet and an outlet, a, chamber between said inlet and outlet, a valve controlling said outlet, and means for controlling said valve comprising a movable member in said chamber against which the fluid operates at opposite faces thereof, said member being so arranged/that the pressure of the iin-coming fluid is exerted against one face thereof and operates to produce the floivof fluid to said valve and movement of said valve toward closed position, the pressure of the fluid between said member and valve being exerted against the opposite face of said. member, said valve in the building up of the pressure against said last-referred-to face of said member moving in a direction opposite to closing.

2. A valve mechanism comprising a casing containing an inlet and an outlet, and :r chamber between said inlet and outlet, a member movable in said chamber and containinf,T an opening. the pressure of the fluid in said chamber operating against the opposite faces of said member, a valve co-operating with said opening, said member tending to move toward a position in which said valve closes said opening and a second valve controlling said outlet. said second valve being controlled by said member and mov- .we p

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incense ing in a direction away from closed position I secured infrom closed position of pressure between it toward closed position upon reduction 'of upon the building up of pressure between it and said member and toward closed position upon reduction of pressure between said member and said last-named valve.

3. A valve vmechanism comprising a casing containing an inlet and an outlet and a chamber between said inlet andoutlet, a member movable in said chamber and containing an opening, the pressure of the iiuid in said chamber operatingV against-the opposite faces of said member, a valve co-operating with said opening, spring means tending to move said member toward a position in whichsaid valve closes said opening, and a second valve controlling saidoutlet, sa1d seconfd valve being controlle by said member and moving in a direction away upon the building up and said member and pressure between said named valve. a

4. A valve mechanism comprising a casing containing an inlet and an outlet and a chamber between said inlet and outlet, a member movable in said taining an opening, the pressure of the iiuid in said chamber operating against the opposite .faces of said member` a valve cooperating with said opening, a second valve controlling said outlet, and a spring tending memlber and said lasttomove said last-named valve to open condition and move said member in opposition to the flow of Huid' into the said chamber,-

said second valve being controlled by said member and moving in a direction away from closed position upon the building up of pressure between it and said member and toward closed position uponreduction of pressure bet-weensaid member and said lastnamed valve.

5. A valve mechanism comprising a casing containing an inlet and an outlet and a chamberbetween said inlet and' outlet, a diaphragm located Within said chamber and place therein at its marginal edges, said diaphragm containing an openy ing, tmhe pressure ofdthe fluid in said chamber operating against the opposite faces of said diaphragm, a valve copperating with said opening, said diaphragm tending to move toward a position in which said valve closes said opening, and a second valve con* trolling said outlet, said second valve being controlled by said diaphragm and moving in a direction away from closed position upon the building np of pressure between it and said diaphragm ytoward closed position upon reduction of pressure between said diaphragm and said last-named valve.

A valve mechanism comprising a casing containing an Iinlet and an outlet and a chamber between said inlet and outlet, a diaphragm located within said chamber and chamber and consecured in' place therein at secured in place therein at its marginal edges, saidldiaphragm containing an opening, the pressure of the Fluid in said chamber operating against the opposite faces of said diaphragm, a valve co-operating with said opening, spring means tending to move said diaphragm toward a position in which said valve closes said opening, and aI second valve controlling said outlet, said second valve being controlled by said diaphragm and moving in a direction away from closed position upon the building up of pressure between it and said diaphragm toward closed position upon reduction of pressure between said diaphragm and said last-named valve.

7. A valve mechanism comprising a casing containing an inlet and an outlet and. a chamber between said inlet and outlet, a diaphragm located within said chamber and secured in place therein at its marginal edges, said diaphragm containing an opening, the pressure of the Huid in said chamber operatingfagainst the opposite faces of said diaphragm, a valve co-operatirig with said opening, a second valve controlling said outlet, and a spring tending to move said last-namedv valve to open condition and move said diaphragm in opposition to the fiow of fluid into valve being controlled by said diaphragm and moving in a direction away from closed position upon the building up of pressure between it and said diaphragm toward closed position upon reduction of pressure betlween said diaphragm and said'last-named va ve.

8. A valve mechanism comprising a casing containing an inlet and an outlet and a chamber between said inlet and outlet, a

diaphragm located within said chamber and edges,'said diaphragm containing an opening, the pressure of the fluid in said chamber operating against the opposite faces of said diaphragm, a valve co-operating with said opening, a second valve controlling said outlet and movable in a direction at angles to the plane of said diaphragm and abutting said diaphragm, and a spring operating against said second valve and operating tomove the latter toward open con-f said chamber, said second its marginal' totl Illltl phragin containing`r an opening, whereby the portlons of said Chamber at opposite sides oi said diaphragm are 1n communication ywith each other. a valve of taper forni extending info sziid opening. a second, receptacle valve controlling said ouilet and si spring tending to move said second valve toward open condition, said second valve abutting, under the action of said spring, against the face of said diaphragm opposite to the face thereof nearest said inlet, whereby upon the building up of pressure, between said diaphragm and said second `Valve, said second valve moves in a direction away from closed position, and upon reduction of pressure between said diaphragm and said second valve, moves toward open position.

JUHN ZANDER.

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